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[mod_webdav] workaround Microsoft-WebDAV-MiniRedir
[lighttpd.git] / src / mod_webdav.c
blob592df188e868f6a76ba1d33d90a7a53275cadc6f
1 /*
2 * mod_webdav
3 */
4
5 /*
6 * Note: This plugin is a basic implementation of [RFC4918] WebDAV
7 *
8 * Version Control System (VCS) backing WebDAV is recommended instead
9 * and Subversion (svn) is one such VCS supporting WebDAV.
10 *
11 * status: *** EXPERIMENTAL *** (and likely insecure encoding/decoding)
12 *
13 * future:
14 *
15 * TODO: moving props should delete any existing props instead of
16 * preserving any that are not overwritten with UPDATE OR REPLACE
17 * (and, if merging directories, be careful when doing so)
18 * TODO: add proper support for locks with "shared" lockscope
19 * (instead of treating match of any shared lock as sufficient,
20 * even when there are different lockroots)
21 * TODO: does libxml2 xml-decode (html-decode),
22 * or must I do so to normalize input?
23 * TODO: add strict enforcement of property names to be valid XML tags
24 * (or encode as such before putting into database)
25 * & " < >
26 * TODO: should we be using xmlNodeListGetString() or xmlBufNodeDump()
27 * and how does it handle encoding and entity-inlining of external refs?
28 * Must xml decode/encode (normalize) before storing user data in database
29 * if going to add that data verbatim to xml doc returned in queries
30 * TODO: when walking xml nodes, should add checks for "DAV:" namespace
31 * TODO: consider where it might be useful/informative to check
32 * SQLITE_OK != sqlite3_reset() or SQLITE_OK != sqlite3_bind_...() or ...
33 * (in some cases no rows returned is ok, while in other cases it is not)
34 * TODO: Unsupported: !con->conf.follow_symlink is not currently honored;
35 * symlinks are followed. Supporting !con->conf.follow_symlinks would
36 * require operating system support for POSIX.1-2008 *at() commands,
37 * and reworking the mod_webdav code to exclusively operate with *at()
38 * commands, for example, replacing unlink() with unlinkat().
39 *
40 * RFE: add config option whether or not to include locktoken and ownerinfo
41 * in PROPFIND lockdiscovery
42 *
43 * deficiencies
44 * - incomplete "shared" lock support
45 * - review code for proper decoding/encoding of elements from/to XML and db
46 * - preserve XML info in scope on dead properties, e.g. xml:lang
47 *
48 * [RFC4918] 4.3 Property Values
49 * Servers MUST preserve the following XML Information Items (using the
50 * terminology from [REC-XML-INFOSET]) in storage and transmission of dead
51 * properties: ...
52 * [RFC4918] 14.26 set XML Element
53 * The 'set' element MUST contain only a 'prop' element. The elements
54 * contained by the 'prop' element inside the 'set' element MUST specify the
55 * name and value of properties that are set on the resource identified by
56 * Request-URI. If a property already exists, then its value is replaced.
57 * Language tagging information appearing in the scope of the 'prop' element
58 * (in the "xml:lang" attribute, if present) MUST be persistently stored along
59 * with the property, and MUST be subsequently retrievable using PROPFIND.
60 * [RFC4918] F.2 Changes for Server Implementations
61 * Strengthened server requirements for storage of property values, in
62 * particular persistence of language information (xml:lang), whitespace, and
63 * XML namespace information (see Section 4.3).
64 *
65 * resource usage containment
66 * - filesystem I/O operations might take a non-trivial amount of time,
67 * blocking the server from responding to other requests during this time.
68 * Potential solution: have a thread dedicated to handling webdav requests
69 * and serialize such requests in each thread dedicated to handling webdav.
70 * (Limit number of such dedicated threads.) Remove write interest from
71 * connection during this period so that server will not trigger any timeout
72 * on the connection.
73 * - recursive directory operations are depth-first and may consume a large
74 * number of file descriptors if the directory hierarchy is deep.
75 * Potential solution: serialize webdav requests into dedicated thread (above)
76 * Potential solution: perform breadth-first directory traversal and pwrite()
77 * directory paths into a temporary file. After reading each directory,
78 * close() the dirhandle and pread() next directory from temporary file.
79 * (Keeping list of directories in memory might result in large memory usage)
80 * - flush response to client (or to intermediate temporary file) at regular
81 * intervals or triggers to avoid response consume large amount of memory
82 * during operations on large collection hierarchies (with lots of nested
83 * directories)
84 *
85 * beware of security concerns involved in enabling WebDAV
86 * on publicly accessible servers
87 * - (general) [RFC4918] 20 Security Considersations
88 * - (specifically) [RFC4918] 20.6 Implications of XML Entities
89 * - TODO review usage of xml libs for security, resource usage, containment
90 * libxml2 vs expat vs ...
91 * http://xmlbench.sourceforge.net/
92 * http://stackoverflow.com/questions/399704/xml-parser-for-c
93 * http://tibleiz.net/asm-xml/index.html
94 * http://dev.yorhel.nl/yxml
95 * - how might mod_webdav be affected by mod_openssl setting REMOTE_USER?
96 * - when encoding href in responses, also ensure proper XML encoding
97 * (do we need to ENCODING_REL_URI and then ENCODING_MINIMAL_XML?)
98 * - TODO: any (non-numeric) data that goes into database should be encoded
99 * before being sent back to user, not just href. Perhaps anything that
100 * is not an href should be stored in database in XML-encoded form.
101 *
102 * consider implementing a set of (reasonable) limits on such things as
103 * - max number of collections
104 * - max number of objects in a collection
105 * - max number of properties per object
106 * - max length of property name
107 * - max length of property value
108 * - max length of locktoken, lockroot, ownerinfo
109 * - max number of locks held by a client, or by an owner
110 * - max number of locks on a resource (shared locks)
111 * - ...
112 *
113 * robustness
114 * - should check return value from sqlite3_reset(stmt) for REPLACE, UPDATE,
115 * DELETE statements (which is when commit occurs and locks are obtained/fail)
116 * - handle SQLITE_BUSY (e.g. other processes modifying db and hold locks)
117 * https://www.sqlite.org/lang_transaction.html
118 * https://www.sqlite.org/rescode.html#busy
119 * https://www.sqlite.org/c3ref/busy_handler.html
120 * https://www.sqlite.org/c3ref/busy_timeout.html
121 * - periodically execute query to delete expired locks
122 * (MOD_WEBDAV_SQLITE_LOCKS_DELETE_EXPIRED)
123 * (should defend against removing locks protecting long-running operations
124 * that are in progress on the server)
125 * - having all requests go through database, including GET and HEAD would allow
126 * for better transactional semantics, instead of the current race conditions
127 * inherent in multiple (and many) filesystem operations. All queries would
128 * go through database, which would map to objects on disk, and copy and move
129 * would simply be database entries to objects with reference counts and
130 * copy-on-write semantics (instead of potential hard-links on disk).
131 * lstat() information could also be stored in database. Right now, if a file
132 * is copied or moved or deleted, the status of the property update in the db
133 * is discarded, whether it succeeds or not, since file operation succeeded.
134 * (Then again, it might also be okay if props do not exist on a given file.)
135 * On the other hand, if everything went through database, then etag could be
136 * stored in database and could be updated upon PUT (or MOVE/COPY/DELETE).
137 * There would also need to be a way to trigger a rescan of filesystem to
138 * bring the database into sync with any out-of-band changes.
139 *
140 *
141 * notes:
142 *
143 * - lstat() used instead of stat_cache_*() since the stat_cache might have
144 * expired data, as stat_cache is not invalidated by outside modifications,
145 * such as WebDAV PUT method (unless FAM is used)
146 *
147 * - SQLite database can be run in WAL mode (https://sqlite.org/wal.html)
148 * though mod_webdav does not provide a mechanism to configure WAL.
149 * Instead, once lighttpd starts up mod_webdav and creates the database,
150 * set WAL mode on the database from the command and then restart lighttpd.
151 */
152
153
154 /* linkat() fstatat() unlinkat() fdopendir() NAME_MAX */
155 #if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE-0 < 700
156 #undef _XOPEN_SOURCE
157 #define _XOPEN_SOURCE 700
158 #endif
159 /* DT_UNKNOWN DTTOIF() */
160 #ifndef _GNU_SOURCE
161 #define _GNU_SOURCE
162 #endif
163
164 #include "first.h" /* first */
165 #include "sys-mmap.h"
166 #include <sys/types.h>
167 #include <sys/stat.h>
168 #include <dirent.h>
169 #include <errno.h>
170 #include <fcntl.h>
171 #include <stdio.h> /* rename() */
172 #include <stdlib.h> /* strtol() */
173 #include <string.h>
174 #include <strings.h> /* strncasecmp() */
175 #include <unistd.h> /* getpid() linkat() rmdir() unlinkat() */
176
177 #ifndef _D_EXACT_NAMLEN
178 #ifdef _DIRENT_HAVE_D_NAMLEN
179 #define _D_EXACT_NAMLEN(d) ((d)->d_namlen)
180 #else
181 #define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name))
182 #endif
183 #endif
184
185 #if defined(HAVE_LIBXML_H) && defined(HAVE_SQLITE3_H)
186
187 #define USE_PROPPATCH
188 /* minor: libxml2 includes stdlib.h in headers, too */
189 #include <libxml/tree.h>
190 #include <libxml/parser.h>
191 #include <sqlite3.h>
192
193 #if defined(HAVE_LIBUUID) && defined(HAVE_UUID_UUID_H)
194 #define USE_LOCKS
195 #include <uuid/uuid.h>
196 #endif
197
198 #endif /* defined(HAVE_LIBXML_H) && defined(HAVE_SQLITE3_H) */
199
200 #include "base.h"
201 #include "buffer.h"
202 #include "chunk.h"
203 #include "fdevent.h"
204 #include "http_header.h"
205 #include "etag.h"
206 #include "log.h"
207 #include "connections.h"/* connection_handle_read_post_state() */
208 #include "request.h"
209 #include "response.h" /* http_response_redirect_to_directory() */
210 #include "stat_cache.h" /* stat_cache_mimetype_by_ext() */
211
212 #include "configfile.h"
213 #include "plugin.h"
214
215 #define http_status_get(con) ((con)->http_status)
216 #define http_status_set_fin(con, code) ((con)->file_finished = 1, \
217 (con)->mode = DIRECT, \
218 (con)->http_status = (code))
219 #define http_status_set(con, code) ((con)->http_status = (code))
220 #define http_status_unset(con) ((con)->http_status = 0)
221 #define http_status_is_set(con) (0 != (con)->http_status)
222 __attribute_cold__
223 __attribute_noinline__
224 static int http_status_set_error (connection *con, int status) {
225 return http_status_set_fin(con, status);
226 }
227
228 typedef physical physical_st;
229
230 INIT_FUNC(mod_webdav_init);
231 FREE_FUNC(mod_webdav_free);
232 SETDEFAULTS_FUNC(mod_webdav_set_defaults);
233 SERVER_FUNC(mod_webdav_worker_init);
234 URIHANDLER_FUNC(mod_webdav_uri_handler);
235 PHYSICALPATH_FUNC(mod_webdav_physical_handler);
236 SUBREQUEST_FUNC(mod_webdav_subrequest_handler);
237 CONNECTION_FUNC(mod_webdav_handle_reset);
238
239 int mod_webdav_plugin_init(plugin *p);
240 int mod_webdav_plugin_init(plugin *p) {
241 p->version = LIGHTTPD_VERSION_ID;
242 p->name = buffer_init_string("webdav");
243
244 p->init = mod_webdav_init;
245 p->cleanup = mod_webdav_free;
246 p->set_defaults = mod_webdav_set_defaults;
247 p->worker_init = mod_webdav_worker_init;
248 p->handle_uri_clean = mod_webdav_uri_handler;
249 p->handle_physical = mod_webdav_physical_handler;
250 p->handle_subrequest = mod_webdav_subrequest_handler;
251 p->connection_reset = mod_webdav_handle_reset;
252
253 p->data = NULL;
254
255 return 0;
256 }
257
258
259 #define WEBDAV_FILE_MODE S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH
260 #define WEBDAV_DIR_MODE S_IRWXU|S_IRWXG|S_IRWXO
261
262 #define WEBDAV_FLAG_LC_NAMES 0x01
263 #define WEBDAV_FLAG_OVERWRITE 0x02
264 #define WEBDAV_FLAG_MOVE_RENAME 0x04
265 #define WEBDAV_FLAG_COPY_LINK 0x08
266 #define WEBDAV_FLAG_MOVE_XDEV 0x10
267 #define WEBDAV_FLAG_COPY_XDEV 0x20
268
269 #define webdav_xmlstrcmp_fixed(s, fixed) \
270 strncmp((const char *)(s), (fixed), sizeof(fixed))
271
272 #include <ctype.h> /* isupper() tolower() */
273 static void
274 webdav_str_len_to_lower (char * const restrict s, const uint32_t len)
275 {
276 /*(caller must ensure that len not truncated to (int);
277 * for current intended use, NAME_MAX typically <= 255)*/
278 for (int i = 0; i < (int)len; ++i) {
279 if (isupper(s[i]))
280 s[i] = tolower(s[i]);
281 }
282 }
283
284 typedef struct {
285 #ifdef USE_PROPPATCH
286 sqlite3 *sqlh;
287 sqlite3_stmt *stmt_props_select_propnames;
288 sqlite3_stmt *stmt_props_select_props;
289 sqlite3_stmt *stmt_props_select_prop;
290 sqlite3_stmt *stmt_props_update_prop;
291 sqlite3_stmt *stmt_props_delete_prop;
292
293 sqlite3_stmt *stmt_props_copy;
294 sqlite3_stmt *stmt_props_move;
295 sqlite3_stmt *stmt_props_move_col;
296 sqlite3_stmt *stmt_props_delete;
297
298 sqlite3_stmt *stmt_locks_acquire;
299 sqlite3_stmt *stmt_locks_refresh;
300 sqlite3_stmt *stmt_locks_release;
301 sqlite3_stmt *stmt_locks_read;
302 sqlite3_stmt *stmt_locks_read_uri;
303 sqlite3_stmt *stmt_locks_read_uri_infinity;
304 sqlite3_stmt *stmt_locks_read_uri_members;
305 sqlite3_stmt *stmt_locks_delete_uri;
306 sqlite3_stmt *stmt_locks_delete_uri_col;
307 #else
308 int dummy;
309 #endif
310 } sql_config;
311
312 /* plugin config for all request/connections */
313
314 typedef struct {
315 int config_context_idx;
316 uint32_t directives;
317 unsigned short enabled;
318 unsigned short is_readonly;
319 unsigned short log_xml;
320 unsigned short deprecated_unsafe_partial_put_compat;
321
322 sql_config *sql;
323 server *srv;
324 buffer *tmpb;
325 buffer *sqlite_db_name; /* not used after worker init */
326 array *opts;
327 } plugin_config;
328
329 typedef struct {
330 PLUGIN_DATA;
331 int nconfig;
332 plugin_config **config_storage;
333 } plugin_data;
334
335
336 /* init the plugin data */
337 INIT_FUNC(mod_webdav_init) {
338 return calloc(1, sizeof(plugin_data));
339 }
340
341
342 /* destroy the plugin data */
343 FREE_FUNC(mod_webdav_free) {
344 plugin_data *p = (plugin_data *)p_d;
345 if (!p) return HANDLER_GO_ON;
346
347 if (p->config_storage) {
348 #ifdef USE_PROPPATCH
349 for (int i = 0; i < p->nconfig; ++i) {
350 plugin_config * const s = p->config_storage[i];
351 if (NULL == s) continue;
352 buffer_free(s->sqlite_db_name);
353 array_free(s->opts);
354
355 sql_config * const sql = s->sql;
356 if (!sql || !sql->sqlh) {
357 free(sql);
358 continue;
359 }
360
361 sqlite3_finalize(sql->stmt_props_select_propnames);
362 sqlite3_finalize(sql->stmt_props_select_props);
363 sqlite3_finalize(sql->stmt_props_select_prop);
364 sqlite3_finalize(sql->stmt_props_update_prop);
365 sqlite3_finalize(sql->stmt_props_delete_prop);
366 sqlite3_finalize(sql->stmt_props_copy);
367 sqlite3_finalize(sql->stmt_props_move);
368 sqlite3_finalize(sql->stmt_props_move_col);
369 sqlite3_finalize(sql->stmt_props_delete);
370
371 sqlite3_finalize(sql->stmt_locks_acquire);
372 sqlite3_finalize(sql->stmt_locks_refresh);
373 sqlite3_finalize(sql->stmt_locks_release);
374 sqlite3_finalize(sql->stmt_locks_read);
375 sqlite3_finalize(sql->stmt_locks_read_uri);
376 sqlite3_finalize(sql->stmt_locks_read_uri_infinity);
377 sqlite3_finalize(sql->stmt_locks_read_uri_members);
378 sqlite3_finalize(sql->stmt_locks_delete_uri);
379 sqlite3_finalize(sql->stmt_locks_delete_uri_col);
380 sqlite3_close(sql->sqlh);
381 free(sql);
382 }
383 #endif
384 free(p->config_storage);
385 }
386
387 free(p);
388
389 UNUSED(srv);
390 return HANDLER_GO_ON;
391 }
392
393
394 __attribute_cold__
395 static handler_t mod_webdav_sqlite3_init (plugin_config * restrict s, log_error_st *errh);
396
397 /* handle plugin config and check values */
398 SETDEFAULTS_FUNC(mod_webdav_set_defaults) {
399
400 #ifdef USE_PROPPATCH
401 int sqlrc = sqlite3_config(SQLITE_CONFIG_SINGLETHREAD);
402 if (sqlrc != SQLITE_OK) {
403 log_error(srv->errh, __FILE__, __LINE__, "sqlite3_config(): %s",
404 sqlite3_errstr(sqlrc));
405 /*(performance option since our use is not threaded; not fatal)*/
406 /*return HANDLER_ERROR;*/
407 }
408 #endif
409
410 config_values_t cv[] = {
411 { "webdav.activate", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION },
412 { "webdav.is-readonly", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION },
413 { "webdav.log-xml", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION },
414 { "webdav.sqlite-db-name", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
415 { "webdav.opts", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },
416
417 { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
418 };
419
420 plugin_data * const p = (plugin_data *)p_d;
421 p->config_storage = calloc(srv->config_context->used, sizeof(plugin_config *));
422 force_assert(p->config_storage);
423
424 const size_t n_context = p->nconfig = srv->config_context->used;
425 for (size_t i = 0; i < n_context; ++i) {
426 data_config const *config =
427 (data_config const *)srv->config_context->data[i];
428 plugin_config * const restrict s = calloc(1, sizeof(plugin_config));
429 force_assert(s);
430 p->config_storage[i] = s;
431 s->sqlite_db_name = buffer_init();
432 s->opts = array_init();
433
434 cv[0].destination = &(s->enabled);
435 cv[1].destination = &(s->is_readonly);
436 cv[2].destination = &(s->log_xml);
437 cv[3].destination = s->sqlite_db_name;
438 cv[4].destination = s->opts;
439
440 if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
441 return HANDLER_ERROR;
442 }
443
444 if (!buffer_is_empty(s->sqlite_db_name)) {
445 if (mod_webdav_sqlite3_init(s, srv->errh) == HANDLER_ERROR)
446 return HANDLER_ERROR;
447 }
448
449 for (size_t j = 0, used = s->opts->used; j < used; ++j) {
450 data_string *ds = (data_string *)s->opts->data[j];
451 if (buffer_is_equal_string(ds->key,
452 CONST_STR_LEN("deprecated-unsafe-partial-put"))
453 && buffer_is_equal_string(ds->value, CONST_STR_LEN("enable"))) {
454 s->deprecated_unsafe_partial_put_compat = 1;
455 continue;
456 }
457 log_error(srv->errh, __FILE__, __LINE__,
458 "unrecognized webdav.opts: %.*s",
459 BUFFER_INTLEN_PTR(ds->key));
460 return HANDLER_ERROR;
461 }
462 }
463 if (n_context) {
464 p->config_storage[0]->srv = srv;
465 p->config_storage[0]->tmpb = srv->tmp_buf;
466 }
467
468 return HANDLER_GO_ON;
469 }
470
471
472 #define PATCH_OPTION(x) pconf->x = s->x;
473 static void
474 mod_webdav_patch_connection (server * const restrict srv,
475 connection * const restrict con,
476 const plugin_data * const restrict p,
477 plugin_config * const restrict pconf)
478 {
479 const plugin_config *s = p->config_storage[0];
480 memcpy(pconf, s, sizeof(*s));
481 data_config ** const restrict context_data =
482 (data_config **)srv->config_context->data;
483
484 for (size_t i = 1; i < srv->config_context->used; ++i) {
485 data_config * const dc = context_data[i];
486 if (!config_check_cond(srv, con, dc))
487 continue; /* condition did not match */
488
489 s = p->config_storage[i];
490
491 /* merge config */
492 for (size_t j = 0; j < dc->value->used; ++j) {
493 data_unset *du = dc->value->data[j];
494 if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.activate"))) {
495 PATCH_OPTION(enabled);
496 } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.is-readonly"))) {
497 PATCH_OPTION(is_readonly);
498 } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.log-xml"))) {
499 PATCH_OPTION(log_xml);
500 #ifdef USE_PROPPATCH
501 } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.sqlite-db-name"))) {
502 PATCH_OPTION(sql);
503 #endif
504 } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("webdav.opts"))) {
505 PATCH_OPTION(deprecated_unsafe_partial_put_compat);
506 }
507 }
508 }
509 }
510
511
512 URIHANDLER_FUNC(mod_webdav_uri_handler)
513 {
514 UNUSED(srv);
515 if (con->request.http_method != HTTP_METHOD_OPTIONS)
516 return HANDLER_GO_ON;
517
518 plugin_config pconf;
519 mod_webdav_patch_connection(srv, con, (plugin_data *)p_d, &pconf);
520 if (!pconf.enabled) return HANDLER_GO_ON;
521
522 /* [RFC4918] 18 DAV Compliance Classes */
523 http_header_response_set(con, HTTP_HEADER_OTHER,
524 CONST_STR_LEN("DAV"),
525 #ifdef USE_LOCKS
526 CONST_STR_LEN("1,2,3")
527 #else
528 CONST_STR_LEN("1,3")
529 #endif
530 );
531
532 /* instruct MS Office Web Folders to use DAV
533 * (instead of MS FrontPage Extensions)
534 * http://www.zorched.net/2006/03/01/more-webdav-tips-tricks-and-bugs/ */
535 http_header_response_set(con, HTTP_HEADER_OTHER,
536 CONST_STR_LEN("MS-Author-Via"),
537 CONST_STR_LEN("DAV"));
538
539 if (pconf.is_readonly)
540 http_header_response_append(con, HTTP_HEADER_OTHER,
541 CONST_STR_LEN("Allow"),
542 CONST_STR_LEN("PROPFIND"));
543 else
544 http_header_response_append(con, HTTP_HEADER_OTHER,
545 CONST_STR_LEN("Allow"),
546 #ifdef USE_PROPPATCH
547 #ifdef USE_LOCKS
548 CONST_STR_LEN(
549 "PROPFIND, DELETE, MKCOL, PUT, MOVE, COPY, PROPPATCH, LOCK, UNLOCK")
550 #else
551 CONST_STR_LEN(
552 "PROPFIND, DELETE, MKCOL, PUT, MOVE, COPY, PROPPATCH")
553 #endif
554 #else
555 CONST_STR_LEN(
556 "PROPFIND, DELETE, MKCOL, PUT, MOVE, COPY")
557 #endif
558 );
559
560 return HANDLER_GO_ON;
561 }
562
563
564 #ifdef USE_LOCKS
565
566 typedef struct webdav_lockdata {
567 buffer locktoken;
568 buffer lockroot;
569 buffer ownerinfo;
570 buffer *owner;
571 const buffer *lockscope; /* future: might use enum, store int in db */
572 const buffer *locktype; /* future: might use enum, store int in db */
573 int depth;
574 int timeout; /* offset from now, not absolute time_t */
575 } webdav_lockdata;
576
577 typedef struct { const char *ptr; uint32_t used; uint32_t size; } tagb;
578
579 static const tagb lockscope_exclusive =
580 { "exclusive", sizeof("exclusive"), 0 };
581 static const tagb lockscope_shared =
582 { "shared", sizeof("shared"), 0 };
583 static const tagb locktype_write =
584 { "write", sizeof("write"), 0 };
585
586 #endif
587
588 typedef struct {
589 const char *ns;
590 const char *name;
591 uint32_t nslen;
592 uint32_t namelen;
593 } webdav_property_name;
594
595 typedef struct {
596 webdav_property_name *ptr;
597 int used;
598 int size;
599 } webdav_property_names;
600
601 /*
602 * http://www.w3.org/TR/1998/NOTE-XML-data-0105/
603 * The datatype attribute "dt" is defined in the namespace named
604 * "urn:uuid:C2F41010-65B3-11d1-A29F-00AA00C14882/".
605 * (See the XML Namespaces Note at the W3C site for details of namespaces.)
606 * The full URN of the attribute is
607 * "urn:uuid:C2F41010-65B3-11d1-A29F-00AA00C14882/dt".
608 * http://www.w3.org/TR/1998/NOTE-xml-names-0119
609 * http://www.w3.org/TR/1998/WD-xml-names-19980327
610 * http://lists.xml.org/archives/xml-dev/200101/msg00924.html
611 * http://lists.xml.org/archives/xml-dev/200101/msg00929.html
612 * http://lists.xml.org/archives/xml-dev/200101/msg00930.html
613 * (Microsoft) Namespace Guidelines
614 * https://msdn.microsoft.com/en-us/library/ms879470%28v=exchg.65%29.aspx
615 * (Microsoft) XML Persistence Format
616 * https://msdn.microsoft.com/en-us/library/ms676547%28v=vs.85%29.aspx
617 * http://www.xml.com/pub/a/2002/06/26/vocabularies.html
618 * The "Uuid" namespaces is the namespace
619 * "uuid:C2F41010-65B3-11d1-A29F-00AA00C14882",
620 * mainly found in association with the MS Office
621 * namespace on the http://www.omg.org website.
622 * http://www.data2type.de/en/xml-xslt-xslfo/wordml/wordml-introduction/the-root-element/
623 * xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882"
624 * By using the prefix dt, the namespace declares an attribute which
625 * determines the data type of a value. The name of the underlying schema
626 * is dt.xsd and it can be found in the folder for Excel schemas.
627 */
628 #define MOD_WEBDAV_XMLNS_NS0 "xmlns:ns0=\"urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/\""
629
630
631 static void
632 webdav_xml_doctype (buffer * const b, connection * const con)
633 {
634 http_header_response_set(con, HTTP_HEADER_CONTENT_TYPE,
635 CONST_STR_LEN("Content-Type"),
636 CONST_STR_LEN("application/xml; charset=\"utf-8\""));
637
638 buffer_copy_string_len(b, CONST_STR_LEN(
639 "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"));
640 }
641
642
643 static void
644 webdav_xml_prop (buffer * const b,
645 const webdav_property_name * const prop,
646 const char * const value, const uint32_t vlen)
647 {
648 buffer_append_string_len(b, CONST_STR_LEN("<"));
649 buffer_append_string_len(b, prop->name, prop->namelen);
650 buffer_append_string_len(b, CONST_STR_LEN(" xmlns=\""));
651 buffer_append_string_len(b, prop->ns, prop->nslen);
652 if (0 == vlen) {
653 buffer_append_string_len(b, CONST_STR_LEN("\"/>"));
654 }
655 else {
656 buffer_append_string_len(b, CONST_STR_LEN("\">"));
657 buffer_append_string_len(b, value, vlen);
658 buffer_append_string_len(b, CONST_STR_LEN("</"));
659 buffer_append_string_len(b, prop->name, prop->namelen);
660 buffer_append_string_len(b, CONST_STR_LEN(">"));
661 }
662 }
663
664
665 #ifdef USE_LOCKS
666 static void
667 webdav_xml_href_raw (buffer * const b, const buffer * const href)
668 {
669 buffer_append_string_len(b, CONST_STR_LEN(
670 "<D:href>"));
671 buffer_append_string_len(b, CONST_BUF_LEN(href));
672 buffer_append_string_len(b, CONST_STR_LEN(
673 "</D:href>\n"));
674 }
675 #endif
676
677
678 static void
679 webdav_xml_href (buffer * const b, const buffer * const href)
680 {
681 buffer_append_string_len(b, CONST_STR_LEN(
682 "<D:href>"));
683 buffer_append_string_encoded(b, CONST_BUF_LEN(href), ENCODING_REL_URI);
684 buffer_append_string_len(b, CONST_STR_LEN(
685 "</D:href>\n"));
686 }
687
688
689 static void
690 webdav_xml_status (buffer * const b, const int status)
691 {
692 buffer_append_string_len(b, CONST_STR_LEN(
693 "<D:status>HTTP/1.1 "));
694 http_status_append(b, status);
695 buffer_append_string_len(b, CONST_STR_LEN(
696 "</D:status>\n"));
697 }
698
699
700 #ifdef USE_PROPPATCH
701 __attribute_cold__
702 static void
703 webdav_xml_propstat_protected (buffer * const b, const char * const propname,
704 const uint32_t len, const int status)
705 {
706 buffer_append_string_len(b, CONST_STR_LEN(
707 "<D:propstat>\n"
708 "<D:prop><DAV:"));
709 buffer_append_string_len(b, propname, len);
710 buffer_append_string_len(b, CONST_STR_LEN(
711 "/></D:prop>\n"
712 "<D:error><DAV:cannot-modify-protected-property/></D:error>\n"));
713 webdav_xml_status(b, status); /* 403 */
714 buffer_append_string_len(b, CONST_STR_LEN(
715 "</D:propstat>\n"));
716 }
717 #endif
718
719
720 #ifdef USE_PROPPATCH
721 __attribute_cold__
722 static void
723 webdav_xml_propstat_status (buffer * const b, const char * const ns,
724 const char * const name, const int status)
725 {
726 buffer_append_string_len(b, CONST_STR_LEN(
727 "<D:propstat>\n"
728 "<D:prop><"));
729 buffer_append_string(b, ns);
730 buffer_append_string(b, name);
731 buffer_append_string_len(b, CONST_STR_LEN(
732 "/></D:prop>\n"));
733 webdav_xml_status(b, status);
734 buffer_append_string_len(b, CONST_STR_LEN(
735 "</D:propstat>\n"));
736 }
737 #endif
738
739
740 static void
741 webdav_xml_propstat (buffer * const b, buffer * const value, const int status)
742 {
743 buffer_append_string_len(b, CONST_STR_LEN(
744 "<D:propstat>\n"
745 "<D:prop>\n"));
746 buffer_append_string_buffer(b, value);
747 buffer_append_string_len(b, CONST_STR_LEN(
748 "</D:prop>\n"));
749 webdav_xml_status(b, status);
750 buffer_append_string_len(b, CONST_STR_LEN(
751 "</D:propstat>\n"));
752 }
753
754
755 __attribute_cold__
756 static void
757 webdav_xml_response_status (buffer * const b,
758 const buffer * const href,
759 const int status)
760 {
761 buffer_append_string_len(b, CONST_STR_LEN(
762 "<D:response>\n"));
763 webdav_xml_href(b, href);
764 webdav_xml_status(b, status);
765 buffer_append_string_len(b, CONST_STR_LEN(
766 "</D:response>\n"));
767 }
768
769
770 #ifdef USE_LOCKS
771 static void
772 webdav_xml_activelock (buffer * const b,
773 const webdav_lockdata * const lockdata,
774 const char * const tbuf, uint32_t tbuf_len)
775 {
776 buffer_append_string_len(b, CONST_STR_LEN(
777 "<D:activelock>\n"
778 "<D:lockscope>"
779 "<D:"));
780 buffer_append_string_buffer(b, lockdata->lockscope);
781 buffer_append_string_len(b, CONST_STR_LEN(
782 "/>"
783 "</D:lockscope>\n"
784 "<D:locktype>"
785 "<D:"));
786 buffer_append_string_buffer(b, lockdata->locktype);
787 buffer_append_string_len(b, CONST_STR_LEN(
788 "/>"
789 "</D:locktype>\n"
790 "<D:depth>"));
791 if (0 == lockdata->depth)
792 buffer_append_string_len(b, CONST_STR_LEN("0"));
793 else
794 buffer_append_string_len(b, CONST_STR_LEN("infinity"));
795 buffer_append_string_len(b, CONST_STR_LEN(
796 "</D:depth>\n"
797 "<D:timeout>"));
798 if (0 != tbuf_len)
799 buffer_append_string_len(b, tbuf, tbuf_len); /* "Second-..." */
800 else {
801 buffer_append_string_len(b, CONST_STR_LEN("Second-"));
802 buffer_append_int(b, lockdata->timeout);
803 }
804 buffer_append_string_len(b, CONST_STR_LEN(
805 "</D:timeout>\n"
806 "<D:owner>"));
807 if (!buffer_string_is_empty(&lockdata->ownerinfo))
808 buffer_append_string_buffer(b, &lockdata->ownerinfo);
809 buffer_append_string_len(b, CONST_STR_LEN(
810 "</D:owner>\n"
811 "<D:locktoken>\n"));
812 webdav_xml_href_raw(b, &lockdata->locktoken); /*(as-is; not URL-encoded)*/
813 buffer_append_string_len(b, CONST_STR_LEN(
814 "</D:locktoken>\n"
815 "<D:lockroot>\n"));
816 webdav_xml_href(b, &lockdata->lockroot);
817 buffer_append_string_len(b, CONST_STR_LEN(
818 "</D:lockroot>\n"
819 "</D:activelock>\n"));
820 }
821 #endif
822
823
824 static void
825 webdav_xml_doc_multistatus (connection * const con,
826 const plugin_config * const pconf,
827 buffer * const ms)
828 {
829 http_status_set_fin(con, 207); /* Multi-status */
830
831 buffer * const b = /*(optimization; buf extended as needed)*/
832 chunkqueue_append_buffer_open_sz(con->write_queue, 128 + ms->used);
833
834 webdav_xml_doctype(b, con);
835 buffer_append_string_len(b, CONST_STR_LEN(
836 "<D:multistatus xmlns:D=\"DAV:\">\n"));
837 buffer_append_string_buffer(b, ms);
838 buffer_append_string_len(b, CONST_STR_LEN(
839 "</D:multistatus>\n"));
840
841 if (pconf->log_xml)
842 log_error(con->errh, __FILE__, __LINE__,
843 "XML-response-body: %.*s", BUFFER_INTLEN_PTR(b));
844
845 chunkqueue_append_buffer_commit(con->write_queue);
846 }
847
848
849 #ifdef USE_PROPPATCH
850 static void
851 webdav_xml_doc_multistatus_response (connection * const con,
852 const plugin_config * const pconf,
853 buffer * const ms)
854 {
855 http_status_set_fin(con, 207); /* Multi-status */
856
857 buffer * const b = /*(optimization; buf extended as needed)*/
858 chunkqueue_append_buffer_open_sz(con->write_queue, 128 + ms->used);
859
860 webdav_xml_doctype(b, con);
861 buffer_append_string_len(b, CONST_STR_LEN(
862 "<D:multistatus xmlns:D=\"DAV:\">\n"
863 "<D:response>\n"));
864 webdav_xml_href(b, con->physical.rel_path);
865 buffer_append_string_buffer(b, ms);
866 buffer_append_string_len(b, CONST_STR_LEN(
867 "</D:response>\n"
868 "</D:multistatus>\n"));
869
870 if (pconf->log_xml)
871 log_error(con->errh, __FILE__, __LINE__,
872 "XML-response-body: %.*s", BUFFER_INTLEN_PTR(b));
873
874 chunkqueue_append_buffer_commit(con->write_queue);
875 }
876 #endif
877
878
879 #ifdef USE_LOCKS
880 static void
881 webdav_xml_doc_lock_acquired (connection * const con,
882 const plugin_config * const pconf,
883 const webdav_lockdata * const lockdata)
884 {
885 /*(http_status is set by caller to 200 OK or 201 Created)*/
886
887 char tbuf[32] = "Second-";
888 li_itostrn(tbuf+sizeof("Second-")-1, sizeof(tbuf)-(sizeof("Second-")-1),
889 lockdata->timeout);
890 const uint32_t tbuf_len = strlen(tbuf);
891 http_header_response_set(con, HTTP_HEADER_OTHER,
892 CONST_STR_LEN("Timeout"),
893 tbuf, tbuf_len);
894
895 buffer * const b =
896 chunkqueue_append_buffer_open_sz(con->write_queue, 1024);
897
898 webdav_xml_doctype(b, con);
899 buffer_append_string_len(b, CONST_STR_LEN(
900 "<D:prop xmlns:D=\"DAV:\">\n"
901 "<D:lockdiscovery>\n"));
902 webdav_xml_activelock(b, lockdata, tbuf, tbuf_len);
903 buffer_append_string_len(b, CONST_STR_LEN(
904 "</D:lockdiscovery>\n"
905 "</D:prop>\n"));
906
907 if (pconf->log_xml)
908 log_error(con->errh, __FILE__, __LINE__,
909 "XML-response-body: %.*s", BUFFER_INTLEN_PTR(b));
910
911 chunkqueue_append_buffer_commit(con->write_queue);
912 }
913 #endif
914
915
916 /*
917 * [RFC4918] 16 Precondition/Postcondition XML Elements
918 */
919
920
921 /*
922 * 403 Forbidden
923 * "<D:error><DAV:cannot-modify-protected-property/></D:error>"
924 *
925 * 403 Forbidden
926 * "<D:error><DAV:no-external-entities/></D:error>"
927 *
928 * 409 Conflict
929 * "<D:error><DAV:preserved-live-properties/></D:error>"
930 */
931
932
933 __attribute_cold__
934 static void
935 webdav_xml_doc_error_propfind_finite_depth (connection * const con)
936 {
937 http_status_set(con, 403); /* Forbidden */
938 con->file_finished = 1;
939
940 buffer * const b =
941 chunkqueue_append_buffer_open_sz(con->write_queue, 256);
942 webdav_xml_doctype(b, con);
943 buffer_append_string_len(b, CONST_STR_LEN(
944 "<D:error><DAV:propfind-finite-depth/></D:error>\n"));
945 chunkqueue_append_buffer_commit(con->write_queue);
946 }
947
948
949 #ifdef USE_LOCKS
950 __attribute_cold__
951 static void
952 webdav_xml_doc_error_lock_token_matches_request_uri (connection * const con)
953 {
954 http_status_set(con, 409); /* Conflict */
955 con->file_finished = 1;
956
957 buffer * const b =
958 chunkqueue_append_buffer_open_sz(con->write_queue, 256);
959 webdav_xml_doctype(b, con);
960 buffer_append_string_len(b, CONST_STR_LEN(
961 "<D:error><DAV:lock-token-matches-request-uri/></D:error>\n"));
962 chunkqueue_append_buffer_commit(con->write_queue);
963 }
964 #endif
965
966
967 #ifdef USE_LOCKS
968 __attribute_cold__
969 static void
970 webdav_xml_doc_423_locked (connection * const con, buffer * const hrefs,
971 const char * const errtag, const uint32_t errtaglen)
972 {
973 http_status_set(con, 423); /* Locked */
974 con->file_finished = 1;
975
976 buffer * const b = /*(optimization; buf extended as needed)*/
977 chunkqueue_append_buffer_open_sz(con->write_queue, 256 + hrefs->used);
978
979 webdav_xml_doctype(b, con);
980 buffer_append_string_len(b, CONST_STR_LEN(
981 "<D:error xmlns:D=\"DAV:\">\n"
982 "<D:"));
983 buffer_append_string_len(b, errtag, errtaglen);
984 buffer_append_string_len(b, CONST_STR_LEN(
985 ">\n"));
986 buffer_append_string_buffer(b, hrefs);
987 buffer_append_string_len(b, CONST_STR_LEN(
988 "</D:"));
989 buffer_append_string_len(b, errtag, errtaglen);
990 buffer_append_string_len(b, CONST_STR_LEN(
991 ">\n"
992 "</D:error>\n"));
993
994 chunkqueue_append_buffer_commit(con->write_queue);
995 }
996 #endif
997
998
999 #ifdef USE_LOCKS
1000 __attribute_cold__
1001 static void
1002 webdav_xml_doc_error_lock_token_submitted (connection * const con,
1003 buffer * const hrefs)
1004 {
1005 webdav_xml_doc_423_locked(con, hrefs,
1006 CONST_STR_LEN("lock-token-submitted"));
1007 }
1008 #endif
1009
1010
1011 #ifdef USE_LOCKS
1012 __attribute_cold__
1013 static void
1014 webdav_xml_doc_error_no_conflicting_lock (connection * const con,
1015 buffer * const hrefs)
1016 {
1017 webdav_xml_doc_423_locked(con, hrefs,
1018 CONST_STR_LEN("no-conflicting-lock"));
1019 }
1020 #endif
1021
1022
1023 #ifdef USE_PROPPATCH
1024
1025 #define MOD_WEBDAV_SQLITE_CREATE_TABLE_PROPERTIES \
1026 "CREATE TABLE IF NOT EXISTS properties (" \
1027 " resource TEXT NOT NULL," \
1028 " prop TEXT NOT NULL," \
1029 " ns TEXT NOT NULL," \
1030 " value TEXT NOT NULL," \
1031 " PRIMARY KEY(resource, prop, ns))"
1032
1033 #define MOD_WEBDAV_SQLITE_CREATE_TABLE_LOCKS \
1034 "CREATE TABLE IF NOT EXISTS locks (" \
1035 " locktoken TEXT NOT NULL," \
1036 " resource TEXT NOT NULL," \
1037 " lockscope TEXT NOT NULL," \
1038 " locktype TEXT NOT NULL," \
1039 " owner TEXT NOT NULL," \
1040 " ownerinfo TEXT NOT NULL," \
1041 " depth INT NOT NULL," \
1042 " timeout TIMESTAMP NOT NULL," \
1043 " PRIMARY KEY(locktoken))"
1044
1045 #define MOD_WEBDAV_SQLITE_PROPS_SELECT_PROPNAMES \
1046 "SELECT prop, ns FROM properties WHERE resource = ?"
1047
1048 #define MOD_WEBDAV_SQLITE_PROPS_SELECT_PROP \
1049 "SELECT value FROM properties WHERE resource = ? AND prop = ? AND ns = ?"
1050
1051 #define MOD_WEBDAV_SQLITE_PROPS_SELECT_PROPS \
1052 "SELECT prop, ns, value FROM properties WHERE resource = ?"
1053
1054 #define MOD_WEBDAV_SQLITE_PROPS_UPDATE_PROP \
1055 "REPLACE INTO properties (resource, prop, ns, value) VALUES (?, ?, ?, ?)"
1056
1057 #define MOD_WEBDAV_SQLITE_PROPS_DELETE_PROP \
1058 "DELETE FROM properties WHERE resource = ? AND prop = ? AND ns = ?"
1059
1060 #define MOD_WEBDAV_SQLITE_PROPS_DELETE \
1061 "DELETE FROM properties WHERE resource = ?"
1062
1063 #define MOD_WEBDAV_SQLITE_PROPS_COPY \
1064 "INSERT INTO properties" \
1065 " SELECT ?, prop, ns, value FROM properties WHERE resource = ?"
1066
1067 #define MOD_WEBDAV_SQLITE_PROPS_MOVE \
1068 "UPDATE OR REPLACE properties SET resource = ? WHERE resource = ?"
1069
1070 #define MOD_WEBDAV_SQLITE_PROPS_MOVE_COL \
1071 "UPDATE OR REPLACE properties SET resource = ? || SUBSTR(resource, ?)" \
1072 " WHERE SUBSTR(resource, 1, ?) = ?"
1073
1074 #define MOD_WEBDAV_SQLITE_LOCKS_ACQUIRE \
1075 "INSERT INTO locks" \
1076 " (locktoken,resource,lockscope,locktype,owner,ownerinfo,depth,timeout)" \
1077 " VALUES (?,?,?,?,?,?,?, CURRENT_TIME + ?)"
1078
1079 #define MOD_WEBDAV_SQLITE_LOCKS_REFRESH \
1080 "UPDATE locks SET timeout = CURRENT_TIME + ? WHERE locktoken = ?"
1081
1082 #define MOD_WEBDAV_SQLITE_LOCKS_RELEASE \
1083 "DELETE FROM locks WHERE locktoken = ?"
1084
1085 #define MOD_WEBDAV_SQLITE_LOCKS_READ \
1086 "SELECT resource, owner, depth" \
1087 " FROM locks WHERE locktoken = ?"
1088
1089 #define MOD_WEBDAV_SQLITE_LOCKS_READ_URI \
1090 "SELECT" \
1091 " locktoken,resource,lockscope,locktype,owner,ownerinfo,depth," \
1092 "timeout - CURRENT_TIME" \
1093 " FROM locks WHERE resource = ?"
1094
1095 #define MOD_WEBDAV_SQLITE_LOCKS_READ_URI_INFINITY \
1096 "SELECT" \
1097 " locktoken,resource,lockscope,locktype,owner,ownerinfo,depth," \
1098 "timeout - CURRENT_TIME" \
1099 " FROM locks" \
1100 " WHERE depth = -1 AND resource = SUBSTR(?, 1, LENGTH(resource))"
1101
1102 #define MOD_WEBDAV_SQLITE_LOCKS_READ_URI_MEMBERS \
1103 "SELECT" \
1104 " locktoken,resource,lockscope,locktype,owner,ownerinfo,depth," \
1105 "timeout - CURRENT_TIME" \
1106 " FROM locks WHERE SUBSTR(resource, 1, ?) = ?"
1107
1108 #define MOD_WEBDAV_SQLITE_LOCKS_DELETE_URI \
1109 "DELETE FROM locks WHERE resource = ?"
1110
1111 #define MOD_WEBDAV_SQLITE_LOCKS_DELETE_URI_COL \
1112 "DELETE FROM locks WHERE SUBSTR(resource, 1, ?) = ?"
1113 /*"DELETE FROM locks WHERE locktoken LIKE ? || '%'"*/
1114
1115 /*(not currently used)*/
1116 #define MOD_WEBDAV_SQLITE_LOCKS_DELETE_EXPIRED \
1117 "DELETE FROM locks WHERE timeout < CURRENT_TIME"
1118
1119 #endif /* USE_PROPPATCH */
1120
1121
1122 __attribute_cold__
1123 static handler_t
1124 mod_webdav_sqlite3_init (plugin_config * const restrict s,
1125 log_error_st * const errh)
1126 {
1127 #ifndef USE_PROPPATCH
1128
1129 log_error(errh, __FILE__, __LINE__,
1130 "Sorry, no sqlite3 and libxml2 support include, "
1131 "compile with --with-webdav-props");
1132 UNUSED(s);
1133 return HANDLER_ERROR;
1134
1135 #else /* USE_PROPPATCH */
1136
1137 /*(expects (plugin_config *s) (log_error_st *errh) (char *err))*/
1138 #define MOD_WEBDAV_SQLITE_CREATE_TABLE(query, label) \
1139 if (sqlite3_exec(sql->sqlh, query, NULL, NULL, &err) != SQLITE_OK) { \
1140 if (0 != strcmp(err, "table " label " already exists")) { \
1141 log_error(errh, __FILE__, __LINE__, \
1142 "create table " label ": %s", err); \
1143 sqlite3_free(err); \
1144 return HANDLER_ERROR; \
1145 } \
1146 sqlite3_free(err); \
1147 }
1148
1149 sql_config * const sql = s->sql = (sql_config *)calloc(1, sizeof(*sql));
1150 force_assert(sql);
1151 int sqlrc = sqlite3_open_v2(s->sqlite_db_name->ptr, &sql->sqlh,
1152 SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE, NULL);
1153 if (sqlrc != SQLITE_OK) {
1154 log_error(errh, __FILE__, __LINE__, "sqlite3_open() '%.*s': %s",
1155 BUFFER_INTLEN_PTR(s->sqlite_db_name),
1156 sql->sqlh
1157 ? sqlite3_errmsg(sql->sqlh)
1158 : sqlite3_errstr(sqlrc));
1159 return HANDLER_ERROR;
1160 }
1161
1162 char *err = NULL;
1163 MOD_WEBDAV_SQLITE_CREATE_TABLE( MOD_WEBDAV_SQLITE_CREATE_TABLE_PROPERTIES,
1164 "properties");
1165 MOD_WEBDAV_SQLITE_CREATE_TABLE( MOD_WEBDAV_SQLITE_CREATE_TABLE_LOCKS,
1166 "locks");
1167
1168 /* add ownerinfo column to locks table (update older mod_webdav sqlite db)
1169 * (could check if 'PRAGMA user_version;' is 0, add column, and increment)*/
1170 #define MOD_WEBDAV_SQLITE_SELECT_LOCKS_OWNERINFO_TEST \
1171 "SELECT COUNT(*) FROM locks WHERE ownerinfo = \"\""
1172 #define MOD_WEBDAV_SQLITE_ALTER_TABLE_LOCKS \
1173 "ALTER TABLE locks ADD COLUMN ownerinfo TEXT NOT NULL DEFAULT \"\""
1174 if (sqlite3_exec(sql->sqlh, MOD_WEBDAV_SQLITE_SELECT_LOCKS_OWNERINFO_TEST,
1175 NULL, NULL, &err) != SQLITE_OK) {
1176 sqlite3_free(err); /* "no such column: ownerinfo" */
1177 if (sqlite3_exec(sql->sqlh, MOD_WEBDAV_SQLITE_ALTER_TABLE_LOCKS,
1178 NULL, NULL, &err) != SQLITE_OK) {
1179 log_error(errh, __FILE__, __LINE__, "alter table locks: %s", err);
1180 sqlite3_free(err);
1181 return HANDLER_ERROR;
1182 }
1183 }
1184
1185 sqlite3_close(sql->sqlh);
1186 sql->sqlh = NULL;
1187
1188 return HANDLER_GO_ON;
1189
1190 #endif /* USE_PROPPATCH */
1191 }
1192
1193
1194 #ifdef USE_PROPPATCH
1195 __attribute_cold__
1196 static handler_t
1197 mod_webdav_sqlite3_prep (sql_config * const restrict sql,
1198 const buffer * const sqlite_db_name,
1199 log_error_st * const errh)
1200 {
1201 /*(expects (plugin_config *s) (log_error_st *errh))*/
1202 #define MOD_WEBDAV_SQLITE_PREPARE_STMT(query, stmt) \
1203 if (sqlite3_prepare_v2(sql->sqlh, query, sizeof(query)-1, &stmt, NULL) \
1204 != SQLITE_OK) { \
1205 log_error(errh, __FILE__, __LINE__, "sqlite3_prepare_v2(): %s", \
1206 sqlite3_errmsg(sql->sqlh)); \
1207 return HANDLER_ERROR; \
1208 }
1209
1210 int sqlrc = sqlite3_open_v2(sqlite_db_name->ptr, &sql->sqlh,
1211 SQLITE_OPEN_READWRITE, NULL);
1212 if (sqlrc != SQLITE_OK) {
1213 log_error(errh, __FILE__, __LINE__, "sqlite3_open() '%.*s': %s",
1214 BUFFER_INTLEN_PTR(sqlite_db_name),
1215 sql->sqlh
1216 ? sqlite3_errmsg(sql->sqlh)
1217 : sqlite3_errstr(sqlrc));
1218 return HANDLER_ERROR;
1219 }
1220
1221 /* future: perhaps not all statements should be prepared;
1222 * infrequently executed statements could be run with sqlite3_exec(),
1223 * or prepared and finalized on each use, as needed */
1224
1225 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_SELECT_PROPNAMES,
1226 sql->stmt_props_select_propnames);
1227 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_SELECT_PROPS,
1228 sql->stmt_props_select_props);
1229 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_SELECT_PROP,
1230 sql->stmt_props_select_prop);
1231 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_UPDATE_PROP,
1232 sql->stmt_props_update_prop);
1233 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_DELETE_PROP,
1234 sql->stmt_props_delete_prop);
1235 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_COPY,
1236 sql->stmt_props_copy);
1237 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_MOVE,
1238 sql->stmt_props_move);
1239 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_MOVE_COL,
1240 sql->stmt_props_move_col);
1241 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_PROPS_DELETE,
1242 sql->stmt_props_delete);
1243 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_ACQUIRE,
1244 sql->stmt_locks_acquire);
1245 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_REFRESH,
1246 sql->stmt_locks_refresh);
1247 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_RELEASE,
1248 sql->stmt_locks_release);
1249 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_READ,
1250 sql->stmt_locks_read);
1251 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_READ_URI,
1252 sql->stmt_locks_read_uri);
1253 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_READ_URI_INFINITY,
1254 sql->stmt_locks_read_uri_infinity);
1255 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_READ_URI_MEMBERS,
1256 sql->stmt_locks_read_uri_members);
1257 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_DELETE_URI,
1258 sql->stmt_locks_delete_uri);
1259 MOD_WEBDAV_SQLITE_PREPARE_STMT( MOD_WEBDAV_SQLITE_LOCKS_DELETE_URI_COL,
1260 sql->stmt_locks_delete_uri_col);
1261
1262 return HANDLER_GO_ON;
1263
1264 }
1265 #endif /* USE_PROPPATCH */
1266
1267
1268 SERVER_FUNC(mod_webdav_worker_init)
1269 {
1270 #ifdef USE_PROPPATCH
1271 /* open sqlite databases and prepare SQL statements in each worker process
1272 *
1273 * https://www.sqlite.org/faq.html
1274 * Under Unix, you should not carry an open SQLite database
1275 * across a fork() system call into the child process.
1276 */
1277 plugin_data * const p = (plugin_data *)p_d;
1278 plugin_config *s = p->config_storage[0];
1279 for (int n_context = p->nconfig+1; --n_context; ++s) {
1280 if (!buffer_is_empty(s->sqlite_db_name)
1281 && mod_webdav_sqlite3_prep(s->sql, s->sqlite_db_name, srv->errh)
1282 == HANDLER_ERROR)
1283 return HANDLER_ERROR;
1284 }
1285 #else
1286 UNUSED(srv);
1287 UNUSED(p_d);
1288 #endif /* USE_PROPPATCH */
1289 return HANDLER_GO_ON;
1290 }
1291
1292
1293 #ifdef USE_PROPPATCH
1294 static int
1295 webdav_db_transaction (const plugin_config * const pconf,
1296 const char * const action)
1297 {
1298 if (!pconf->sql)
1299 return 1;
1300 char *err = NULL;
1301 if (SQLITE_OK == sqlite3_exec(pconf->sql->sqlh, action, NULL, NULL, &err))
1302 return 1;
1303 else {
1304 #if 0
1305 fprintf(stderr, "%s: %s: %s\n", __func__, action, err);
1306 log_error(pconf->errh, __FILE__, __LINE__,
1307 "%s: %s: %s\n", __func__, action, err);
1308 #endif
1309 sqlite3_free(err);
1310 return 0;
1311 }
1312 }
1313
1314 #define webdav_db_transaction_begin(pconf) \
1315 webdav_db_transaction(pconf, "BEGIN;")
1316
1317 #define webdav_db_transaction_begin_immediate(pconf) \
1318 webdav_db_transaction(pconf, "BEGIN IMMEDIATE;")
1319
1320 #define webdav_db_transaction_commit(pconf) \
1321 webdav_db_transaction(pconf, "COMMIT;")
1322
1323 #define webdav_db_transaction_rollback(pconf) \
1324 webdav_db_transaction(pconf, "ROLLBACK;")
1325
1326 #else
1327
1328 #define webdav_db_transaction_begin(pconf) 1
1329 #define webdav_db_transaction_begin_immediate(pconf) 1
1330 #define webdav_db_transaction_commit(pconf) 1
1331 #define webdav_db_transaction_rollback(pconf) 1
1332
1333 #endif
1334
1335
1336 #ifdef USE_LOCKS
1337 static int
1338 webdav_lock_match (const plugin_config * const pconf,
1339 const webdav_lockdata * const lockdata)
1340 {
1341 if (!pconf->sql)
1342 return 0;
1343 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_read;
1344 if (!stmt)
1345 return 0;
1346
1347 sqlite3_bind_text(
1348 stmt, 1, CONST_BUF_LEN(&lockdata->locktoken), SQLITE_STATIC);
1349
1350 int status = -1; /* if lock does not exist */
1351 if (SQLITE_ROW == sqlite3_step(stmt)) {
1352 const char *text = (char *)sqlite3_column_text(stmt, 0); /* resource */
1353 uint32_t text_len = (uint32_t) sqlite3_column_bytes(stmt, 0);
1354 if (text_len < lockdata->lockroot.used
1355 && 0 == memcmp(lockdata->lockroot.ptr, text, text_len)
1356 && (text_len == lockdata->lockroot.used-1
1357 || -1 == sqlite3_column_int(stmt, 2))) { /* depth */
1358 text = (char *)sqlite3_column_text(stmt, 1); /* owner */
1359 text_len = (uint32_t)sqlite3_column_bytes(stmt, 1);
1360 if (0 == text_len /*(if no auth required to lock; not recommended)*/
1361 || buffer_is_equal_string(lockdata->owner, text, text_len))
1362 status = 0; /* success; lock match */
1363 else {
1364 /*(future: might check if owner is a privileged admin user)*/
1365 status = -3; /* not lock owner; not authorized */
1366 }
1367 }
1368 else
1369 status = -2; /* URI is not in scope of lock */
1370 }
1371
1372 sqlite3_reset(stmt);
1373
1374 /* status
1375 * 0 lock exists and uri in scope and owner is privileged/owns lock
1376 * -1 lock does not exist
1377 * -2 URI is not in scope of lock
1378 * -3 owner does not own lock/is not privileged
1379 */
1380 return status;
1381 }
1382 #endif
1383
1384
1385 #ifdef USE_LOCKS
1386 static void
1387 webdav_lock_activelocks_lockdata (sqlite3_stmt * const stmt,
1388 webdav_lockdata * const lockdata)
1389 {
1390 lockdata->locktoken.ptr = (char *)sqlite3_column_text(stmt, 0);
1391 lockdata->locktoken.used = sqlite3_column_bytes(stmt, 0);
1392 lockdata->lockroot.ptr = (char *)sqlite3_column_text(stmt, 1);
1393 lockdata->lockroot.used = sqlite3_column_bytes(stmt, 1);
1394 lockdata->lockscope =
1395 (sqlite3_column_bytes(stmt, 2) == (int)sizeof("exclusive")-1)
1396 ? (const buffer *)&lockscope_exclusive
1397 : (const buffer *)&lockscope_shared;
1398 lockdata->locktype = (const buffer *)&locktype_write;
1399 lockdata->owner->ptr = (char *)sqlite3_column_text(stmt, 4);
1400 lockdata->owner->used = sqlite3_column_bytes(stmt, 4);
1401 lockdata->ownerinfo.ptr = (char *)sqlite3_column_text(stmt, 5);
1402 lockdata->ownerinfo.used = sqlite3_column_bytes(stmt, 5);
1403 lockdata->depth = sqlite3_column_int(stmt, 6);
1404 lockdata->timeout = sqlite3_column_int(stmt, 7);
1405
1406 if (lockdata->locktoken.used) ++lockdata->locktoken.used;
1407 if (lockdata->lockroot.used) ++lockdata->lockroot.used;
1408 if (lockdata->owner->used) ++lockdata->owner->used;
1409 if (lockdata->ownerinfo.used) ++lockdata->ownerinfo.used;
1410 }
1411
1412
1413 typedef
1414 void webdav_lock_activelocks_cb(void * const vdata,
1415 const webdav_lockdata * const lockdata);
1416
1417 static void
1418 webdav_lock_activelocks (const plugin_config * const pconf,
1419 const buffer * const uri,
1420 const int expand_checks,
1421 webdav_lock_activelocks_cb * const lock_cb,
1422 void * const vdata)
1423 {
1424 webdav_lockdata lockdata;
1425 buffer owner = { NULL, 0, 0 };
1426 lockdata.locktoken.size = 0;
1427 lockdata.lockroot.size = 0;
1428 lockdata.ownerinfo.size = 0;
1429 lockdata.owner = &owner;
1430
1431 if (!pconf->sql)
1432 return;
1433
1434 /* check for locks with Depth: 0 (and Depth: infinity if 0==expand_checks)*/
1435 sqlite3_stmt *stmt = pconf->sql->stmt_locks_read_uri;
1436 if (!stmt || !pconf->sql->stmt_locks_read_uri_infinity
1437 || !pconf->sql->stmt_locks_read_uri_members)
1438 return;
1439
1440 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1441
1442 while (SQLITE_ROW == sqlite3_step(stmt)) {
1443 /* (avoid duplication with query below if infinity lock on collection)
1444 * (infinity locks are rejected on non-collections elsewhere) */
1445 if (0 != expand_checks && -1 == sqlite3_column_int(stmt, 6) /*depth*/)
1446 continue;
1447
1448 webdav_lock_activelocks_lockdata(stmt, &lockdata);
1449 if (lockdata.timeout > 0)
1450 lock_cb(vdata, &lockdata);
1451 }
1452
1453 sqlite3_reset(stmt);
1454
1455 if (0 == expand_checks)
1456 return;
1457
1458 /* check for locks with Depth: infinity
1459 * (i.e. collections: self (if collection) or containing collections) */
1460 stmt = pconf->sql->stmt_locks_read_uri_infinity;
1461
1462 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1463
1464 while (SQLITE_ROW == sqlite3_step(stmt)) {
1465 webdav_lock_activelocks_lockdata(stmt, &lockdata);
1466 if (lockdata.timeout > 0)
1467 lock_cb(vdata, &lockdata);
1468 }
1469
1470 sqlite3_reset(stmt);
1471
1472 if (1 == expand_checks)
1473 return;
1474
1475 #ifdef __COVERITY__
1476 force_assert(0 != uri->used);
1477 #endif
1478
1479 /* check for locks on members within (internal to) collection */
1480 stmt = pconf->sql->stmt_locks_read_uri_members;
1481
1482 sqlite3_bind_int( stmt, 1, (int)uri->used-1);
1483 sqlite3_bind_text(stmt, 2, CONST_BUF_LEN(uri), SQLITE_STATIC);
1484
1485 while (SQLITE_ROW == sqlite3_step(stmt)) {
1486 /* (avoid duplication with query above for exact resource match) */
1487 if (uri->used-1 == (uint32_t)sqlite3_column_bytes(stmt, 1) /*resource*/)
1488 continue;
1489
1490 webdav_lock_activelocks_lockdata(stmt, &lockdata);
1491 if (lockdata.timeout > 0)
1492 lock_cb(vdata, &lockdata);
1493 }
1494
1495 sqlite3_reset(stmt);
1496 }
1497 #endif
1498
1499
1500 static int
1501 webdav_lock_delete_uri (const plugin_config * const pconf,
1502 const buffer * const uri)
1503 {
1504 #ifdef USE_LOCKS
1505
1506 if (!pconf->sql)
1507 return 0;
1508 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_delete_uri;
1509 if (!stmt)
1510 return 0;
1511
1512 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1513
1514 int status = 1;
1515 while (SQLITE_DONE != sqlite3_step(stmt)) {
1516 status = 0;
1517 #if 0
1518 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1519 log_error(pconf->errh, __FILE__, __LINE__,
1520 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1521 #endif
1522 }
1523
1524 sqlite3_reset(stmt);
1525
1526 return status;
1527
1528 #else
1529 UNUSED(pconf);
1530 UNUSED(uri);
1531 return 1;
1532 #endif
1533 }
1534
1535
1536 static int
1537 webdav_lock_delete_uri_col (const plugin_config * const pconf,
1538 const buffer * const uri)
1539 {
1540 #ifdef USE_LOCKS
1541
1542 if (!pconf->sql)
1543 return 0;
1544 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_delete_uri_col;
1545 if (!stmt)
1546 return 0;
1547
1548 #ifdef __COVERITY__
1549 force_assert(0 != uri->used);
1550 #endif
1551
1552 sqlite3_bind_int( stmt, 1, (int)uri->used-1);
1553 sqlite3_bind_text(stmt, 2, CONST_BUF_LEN(uri), SQLITE_STATIC);
1554
1555 int status = 1;
1556 while (SQLITE_DONE != sqlite3_step(stmt)) {
1557 status = 0;
1558 #if 0
1559 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1560 log_error(pconf->errh, __FILE__, __LINE__,
1561 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1562 #endif
1563 }
1564
1565 sqlite3_reset(stmt);
1566
1567 return status;
1568
1569 #else
1570 UNUSED(pconf);
1571 UNUSED(uri);
1572 return 1;
1573 #endif
1574 }
1575
1576
1577 #ifdef USE_LOCKS
1578 static int
1579 webdav_lock_acquire (const plugin_config * const pconf,
1580 const webdav_lockdata * const lockdata)
1581 {
1582 /*
1583 * future:
1584 * only lockscope:"exclusive" and locktype:"write" currently supported,
1585 * so inserting strings into database is extraneous, and anyway should
1586 * be enums instead of strings, since there are limited supported values
1587 */
1588
1589 if (!pconf->sql)
1590 return 0;
1591 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_acquire;
1592 if (!stmt)
1593 return 0;
1594
1595 sqlite3_bind_text(
1596 stmt, 1, CONST_BUF_LEN(&lockdata->locktoken), SQLITE_STATIC);
1597 sqlite3_bind_text(
1598 stmt, 2, CONST_BUF_LEN(&lockdata->lockroot), SQLITE_STATIC);
1599 sqlite3_bind_text(
1600 stmt, 3, CONST_BUF_LEN(lockdata->lockscope), SQLITE_STATIC);
1601 sqlite3_bind_text(
1602 stmt, 4, CONST_BUF_LEN(lockdata->locktype), SQLITE_STATIC);
1603 if (lockdata->owner->used)
1604 sqlite3_bind_text(
1605 stmt, 5, CONST_BUF_LEN(lockdata->owner), SQLITE_STATIC);
1606 else
1607 sqlite3_bind_text(
1608 stmt, 5, CONST_STR_LEN(""), SQLITE_STATIC);
1609 if (lockdata->ownerinfo.used)
1610 sqlite3_bind_text(
1611 stmt, 6, CONST_BUF_LEN(&lockdata->ownerinfo), SQLITE_STATIC);
1612 else
1613 sqlite3_bind_text(
1614 stmt, 6, CONST_STR_LEN(""), SQLITE_STATIC);
1615 sqlite3_bind_int(
1616 stmt, 7, lockdata->depth);
1617 sqlite3_bind_int(
1618 stmt, 8, lockdata->timeout);
1619
1620 int status = 1;
1621 if (SQLITE_DONE != sqlite3_step(stmt)) {
1622 status = 0;
1623 #if 0
1624 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1625 log_error(pconf->errh, __FILE__, __LINE__,
1626 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1627 #endif
1628 }
1629
1630 sqlite3_reset(stmt);
1631
1632 return status;
1633 }
1634 #endif
1635
1636
1637 #ifdef USE_LOCKS
1638 static int
1639 webdav_lock_refresh (const plugin_config * const pconf,
1640 webdav_lockdata * const lockdata)
1641 {
1642 if (!pconf->sql)
1643 return 0;
1644 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_refresh;
1645 if (!stmt)
1646 return 0;
1647
1648 const buffer * const locktoken = &lockdata->locktoken;
1649 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(locktoken), SQLITE_STATIC);
1650 sqlite3_bind_int( stmt, 2, lockdata->timeout);
1651
1652 int status = 1;
1653 if (SQLITE_DONE != sqlite3_step(stmt)) {
1654 status = 0;
1655 #if 0
1656 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1657 log_error(pconf->errh, __FILE__, __LINE__,
1658 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1659 #endif
1660 }
1661
1662 sqlite3_reset(stmt);
1663
1664 /*(future: fill in lockscope, locktype, depth from database)*/
1665
1666 return status;
1667 }
1668 #endif
1669
1670
1671 #ifdef USE_LOCKS
1672 static int
1673 webdav_lock_release (const plugin_config * const pconf,
1674 const webdav_lockdata * const lockdata)
1675 {
1676 if (!pconf->sql)
1677 return 0;
1678 sqlite3_stmt * const stmt = pconf->sql->stmt_locks_release;
1679 if (!stmt)
1680 return 0;
1681
1682 sqlite3_bind_text(
1683 stmt, 1, CONST_BUF_LEN(&lockdata->locktoken), SQLITE_STATIC);
1684
1685 int status = 0;
1686 if (SQLITE_DONE == sqlite3_step(stmt))
1687 status = (0 != sqlite3_changes(pconf->sql->sqlh));
1688 else {
1689 #if 0
1690 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1691 log_error(pconf->errh, __FILE__, __LINE__,
1692 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1693 #endif
1694 }
1695
1696 sqlite3_reset(stmt);
1697
1698 return status;
1699 }
1700 #endif
1701
1702
1703 static int
1704 webdav_prop_move_uri (const plugin_config * const pconf,
1705 const buffer * const src,
1706 const buffer * const dst)
1707 {
1708 #ifdef USE_PROPPATCH
1709 if (!pconf->sql)
1710 return 0;
1711 sqlite3_stmt * const stmt = pconf->sql->stmt_props_move;
1712 if (!stmt)
1713 return 0;
1714
1715 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(dst), SQLITE_STATIC);
1716 sqlite3_bind_text(stmt, 2, CONST_BUF_LEN(src), SQLITE_STATIC);
1717
1718 if (SQLITE_DONE != sqlite3_step(stmt)) {
1719 #if 0
1720 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1721 log_error(pconf->errh, __FILE__, __LINE__,
1722 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1723 #endif
1724 }
1725
1726 sqlite3_reset(stmt);
1727
1728 #else
1729 UNUSED(pconf);
1730 UNUSED(src);
1731 UNUSED(dst);
1732 #endif
1733
1734 return 0;
1735 }
1736
1737
1738 static int
1739 webdav_prop_move_uri_col (const plugin_config * const pconf,
1740 const buffer * const src,
1741 const buffer * const dst)
1742 {
1743 #ifdef USE_PROPPATCH
1744 if (!pconf->sql)
1745 return 0;
1746 sqlite3_stmt * const stmt = pconf->sql->stmt_props_move_col;
1747 if (!stmt)
1748 return 0;
1749
1750 #ifdef __COVERITY__
1751 force_assert(0 != src->used);
1752 #endif
1753
1754 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(dst), SQLITE_STATIC);
1755 sqlite3_bind_int( stmt, 2, (int)src->used);
1756 sqlite3_bind_int( stmt, 3, (int)src->used-1);
1757 sqlite3_bind_text(stmt, 4, CONST_BUF_LEN(src), SQLITE_STATIC);
1758
1759 if (SQLITE_DONE != sqlite3_step(stmt)) {
1760 #if 0
1761 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1762 log_error(pconf->errh, __FILE__, __LINE__,
1763 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1764 #endif
1765 }
1766
1767 sqlite3_reset(stmt);
1768
1769 #else
1770 UNUSED(pconf);
1771 UNUSED(src);
1772 UNUSED(dst);
1773 #endif
1774
1775 return 0;
1776 }
1777
1778
1779 static int
1780 webdav_prop_delete_uri (const plugin_config * const pconf,
1781 const buffer * const uri)
1782 {
1783 #ifdef USE_PROPPATCH
1784 if (!pconf->sql)
1785 return 0;
1786 sqlite3_stmt * const stmt = pconf->sql->stmt_props_delete;
1787 if (!stmt)
1788 return 0;
1789
1790 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1791
1792 if (SQLITE_DONE != sqlite3_step(stmt)) {
1793 #if 0
1794 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1795 log_error(pconf->errh, __FILE__, __LINE__,
1796 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1797 #endif
1798 }
1799
1800 sqlite3_reset(stmt);
1801
1802 #else
1803 UNUSED(pconf);
1804 UNUSED(uri);
1805 #endif
1806
1807 return 0;
1808 }
1809
1810
1811 static int
1812 webdav_prop_copy_uri (const plugin_config * const pconf,
1813 const buffer * const src,
1814 const buffer * const dst)
1815 {
1816 #ifdef USE_PROPPATCH
1817 if (!pconf->sql)
1818 return 0;
1819 sqlite3_stmt * const stmt = pconf->sql->stmt_props_copy;
1820 if (!stmt)
1821 return 0;
1822
1823 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(dst), SQLITE_STATIC);
1824 sqlite3_bind_text(stmt, 2, CONST_BUF_LEN(src), SQLITE_STATIC);
1825
1826 if (SQLITE_DONE != sqlite3_step(stmt)) {
1827 #if 0
1828 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1829 log_error(pconf->errh, __FILE__, __LINE__,
1830 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1831 #endif
1832 }
1833
1834 sqlite3_reset(stmt);
1835
1836 #else
1837 UNUSED(pconf);
1838 UNUSED(dst);
1839 UNUSED(src);
1840 #endif
1841
1842 return 0;
1843 }
1844
1845
1846 #ifdef USE_PROPPATCH
1847 static int
1848 webdav_prop_delete (const plugin_config * const pconf,
1849 const buffer * const uri,
1850 const char * const prop_name,
1851 const char * const prop_ns)
1852 {
1853 if (!pconf->sql)
1854 return 0;
1855 sqlite3_stmt * const stmt = pconf->sql->stmt_props_delete_prop;
1856 if (!stmt)
1857 return 0;
1858
1859 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1860 sqlite3_bind_text(stmt, 2, prop_name, strlen(prop_name), SQLITE_STATIC);
1861 sqlite3_bind_text(stmt, 3, prop_ns, strlen(prop_ns), SQLITE_STATIC);
1862
1863 if (SQLITE_DONE != sqlite3_step(stmt)) {
1864 #if 0
1865 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1866 log_error(pconf->errh, __FILE__, __LINE__,
1867 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1868 #endif
1869 }
1870
1871 sqlite3_reset(stmt);
1872
1873 return 0;
1874 }
1875 #endif
1876
1877
1878 #ifdef USE_PROPPATCH
1879 static int
1880 webdav_prop_update (const plugin_config * const pconf,
1881 const buffer * const uri,
1882 const char * const prop_name,
1883 const char * const prop_ns,
1884 const char * const prop_value)
1885 {
1886 if (!pconf->sql)
1887 return 0;
1888 sqlite3_stmt * const stmt = pconf->sql->stmt_props_update_prop;
1889 if (!stmt)
1890 return 0;
1891
1892 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1893 sqlite3_bind_text(stmt, 2, prop_name, strlen(prop_name), SQLITE_STATIC);
1894 sqlite3_bind_text(stmt, 3, prop_ns, strlen(prop_ns), SQLITE_STATIC);
1895 sqlite3_bind_text(stmt, 4, prop_value, strlen(prop_value), SQLITE_STATIC);
1896
1897 if (SQLITE_DONE != sqlite3_step(stmt)) {
1898 #if 0
1899 fprintf(stderr, "%s: %s\n", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1900 log_error(pconf->errh, __FILE__, __LINE__,
1901 "%s: %s", __func__, sqlite3_errmsg(pconf->sql->sqlh));
1902 #endif
1903 }
1904
1905 sqlite3_reset(stmt);
1906
1907 return 0;
1908 }
1909 #endif
1910
1911
1912 static int
1913 webdav_prop_select_prop (const plugin_config * const pconf,
1914 const buffer * const uri,
1915 const webdav_property_name * const prop,
1916 buffer * const b)
1917 {
1918 #ifdef USE_PROPPATCH
1919 if (!pconf->sql)
1920 return -1;
1921 sqlite3_stmt * const stmt = pconf->sql->stmt_props_select_prop;
1922 if (!stmt)
1923 return -1; /* not found */
1924
1925 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1926 sqlite3_bind_text(stmt, 2, prop->name, prop->namelen, SQLITE_STATIC);
1927 sqlite3_bind_text(stmt, 3, prop->ns, prop->nslen, SQLITE_STATIC);
1928
1929 if (SQLITE_ROW == sqlite3_step(stmt)) {
1930 webdav_xml_prop(b, prop, (char *)sqlite3_column_text(stmt, 0),
1931 (uint32_t)sqlite3_column_bytes(stmt, 0));
1932 sqlite3_reset(stmt);
1933 return 0; /* found */
1934 }
1935 sqlite3_reset(stmt);
1936 #else
1937 UNUSED(pconf);
1938 UNUSED(uri);
1939 UNUSED(prop);
1940 UNUSED(b);
1941 #endif
1942 return -1; /* not found */
1943 }
1944
1945
1946 static void
1947 webdav_prop_select_props (const plugin_config * const pconf,
1948 const buffer * const uri,
1949 buffer * const b)
1950 {
1951 #ifdef USE_PROPPATCH
1952 if (!pconf->sql)
1953 return;
1954 sqlite3_stmt * const stmt = pconf->sql->stmt_props_select_props;
1955 if (!stmt)
1956 return;
1957
1958 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1959
1960 while (SQLITE_ROW == sqlite3_step(stmt)) {
1961 webdav_property_name prop;
1962 prop.ns = (char *)sqlite3_column_text(stmt, 1);
1963 prop.name = (char *)sqlite3_column_text(stmt, 0);
1964 prop.nslen = (uint32_t)sqlite3_column_bytes(stmt, 1);
1965 prop.namelen = (uint32_t)sqlite3_column_bytes(stmt, 0);
1966 webdav_xml_prop(b, &prop, (char *)sqlite3_column_text(stmt, 2),
1967 (uint32_t)sqlite3_column_bytes(stmt, 2));
1968 }
1969
1970 sqlite3_reset(stmt);
1971 #else
1972 UNUSED(pconf);
1973 UNUSED(uri);
1974 UNUSED(b);
1975 #endif
1976 }
1977
1978
1979 static int
1980 webdav_prop_select_propnames (const plugin_config * const pconf,
1981 const buffer * const uri,
1982 buffer * const b)
1983 {
1984 #ifdef USE_PROPPATCH
1985 if (!pconf->sql)
1986 return 0;
1987 sqlite3_stmt * const stmt = pconf->sql->stmt_props_select_propnames;
1988 if (!stmt)
1989 return 0;
1990
1991 /* get all property names (EMPTY) */
1992 sqlite3_bind_text(stmt, 1, CONST_BUF_LEN(uri), SQLITE_STATIC);
1993
1994 while (SQLITE_ROW == sqlite3_step(stmt)) {
1995 webdav_property_name prop;
1996 prop.ns = (char *)sqlite3_column_text(stmt, 1);
1997 prop.name = (char *)sqlite3_column_text(stmt, 0);
1998 prop.nslen = (uint32_t)sqlite3_column_bytes(stmt, 1);
1999 prop.namelen = (uint32_t)sqlite3_column_bytes(stmt, 0);
2000 webdav_xml_prop(b, &prop, NULL, 0);
2001 }
2002
2003 sqlite3_reset(stmt);
2004
2005 #else
2006 UNUSED(pconf);
2007 UNUSED(uri);
2008 UNUSED(b);
2009 #endif
2010
2011 return 0;
2012 }
2013
2014
2015 #if defined(__APPLE__) && defined(__MACH__)
2016 #include <copyfile.h> /* fcopyfile() *//* OS X 10.5+ */
2017 #endif
2018 #ifdef HAVE_ELFTC_COPYFILE/* __FreeBSD__ */
2019 #include <libelftc.h> /* elftc_copyfile() */
2020 #endif
2021 #ifdef __linux__
2022 #include <sys/sendfile.h> /* sendfile() */
2023 #endif
2024
2025 /* file copy (blocking)
2026 * fds should point to regular files (S_ISREG()) (not dir, symlink, or other)
2027 * fds should not have O_NONBLOCK flag set
2028 * (unless O_NONBLOCK not relevant for files on a given operating system)
2029 * isz should be size of input file, and is a param to avoid extra fstat()
2030 * since size is needed for Linux sendfile(), as well as posix_fadvise().
2031 * caller should handler fchmod() and copying extended attribute, if desired
2032 */
2033 __attribute_noinline__
2034 static int
2035 webdav_fcopyfile_sz (int ifd, int ofd, off_t isz)
2036 {
2037 if (0 == isz)
2038 return 0;
2039
2040 #ifdef _WIN32
2041 /* Windows CopyFile() not usable here; operates on filenames, not fds */
2042 #else
2043 /*(file descriptors to *regular files* on most OS ignore O_NONBLOCK)*/
2044 /*fcntl(ifd, F_SETFL, fcntl(ifd, F_GETFL, 0) & ~O_NONBLOCK);*/
2045 /*fcntl(ofd, F_SETFL, fcntl(ofd, F_GETFL, 0) & ~O_NONBLOCK);*/
2046 #endif
2047
2048 #if defined(__APPLE__) && defined(__MACH__)
2049 if (0 == fcopyfile(ifd, ofd, NULL, COPYFILE_ALL))
2050 return 0;
2051
2052 if (0 != lseek(ifd, 0, SEEK_SET)) return -1;
2053 if (0 != lseek(ofd, 0, SEEK_SET)) return -1;
2054 #endif
2055
2056 #ifdef HAVE_ELFTC_COPYFILE /* __FreeBSD__ */
2057 if (0 == elftc_copyfile(ifd, ofd))
2058 return 0;
2059
2060 if (0 != lseek(ifd, 0, SEEK_SET)) return -1;
2061 if (0 != lseek(ofd, 0, SEEK_SET)) return -1;
2062 #endif
2063
2064 #ifdef __linux__ /* Linux 2.6.33+ sendfile() supports file-to-file copy */
2065 off_t offset = 0;
2066 while (offset < isz && sendfile(ifd,ofd,&offset,(size_t)(isz-offset)) >= 0);
2067 if (offset == isz)
2068 return 0;
2069
2070 /*lseek(ifd, 0, SEEK_SET);*/ /*(ifd offset not modified due to &offset arg)*/
2071 if (0 != lseek(ofd, 0, SEEK_SET)) return -1;
2072 #endif
2073
2074 ssize_t rd, wr, off;
2075 char buf[16384];
2076 do {
2077 do {
2078 rd = read(ifd, buf, sizeof(buf));
2079 } while (-1 == rd && errno == EINTR);
2080 if (rd < 0) return rd;
2081
2082 off = 0;
2083 do {
2084 wr = write(ofd, buf+off, (size_t)(rd-off));
2085 } while (wr >= 0 ? (off += wr) != rd : errno == EINTR);
2086 if (wr < 0) return -1;
2087 } while (rd > 0);
2088 return rd;
2089 }
2090
2091
2092 static int
2093 webdav_if_match_or_unmodified_since (connection * const con, struct stat *st)
2094 {
2095 buffer *im = (0 != con->etag_flags)
2096 ? http_header_request_get(con, HTTP_HEADER_OTHER,
2097 CONST_STR_LEN("If-Match"))
2098 : NULL;
2099
2100 buffer *inm = (0 != con->etag_flags)
2101 ? http_header_request_get(con, HTTP_HEADER_IF_NONE_MATCH,
2102 CONST_STR_LEN("If-None-Match"))
2103 : NULL;
2104
2105 buffer *ius =
2106 http_header_request_get(con, HTTP_HEADER_OTHER,
2107 CONST_STR_LEN("If-Unmodified-Since"));
2108
2109 if (NULL == im && NULL == inm && NULL == ius) return 0;
2110
2111 struct stat stp;
2112 if (NULL == st)
2113 st = (0 == lstat(con->physical.path->ptr, &stp)) ? &stp : NULL;
2114
2115 buffer *etagb = con->physical.etag;
2116 if (NULL != st && (NULL != im || NULL != inm)) {
2117 etag_create(etagb, st, con->etag_flags);
2118 etag_mutate(etagb, etagb);
2119 }
2120
2121 if (NULL != im) {
2122 if (NULL == st || !etag_is_equal(etagb, im->ptr, 0))
2123 return 412; /* Precondition Failed */
2124 }
2125
2126 if (NULL != inm) {
2127 if (NULL == st
2128 ? !buffer_is_equal_string(inm,CONST_STR_LEN("*"))
2129 || (errno != ENOENT && errno != ENOTDIR)
2130 : etag_is_equal(etagb, inm->ptr, 1))
2131 return 412; /* Precondition Failed */
2132 }
2133
2134 if (NULL != ius) {
2135 if (NULL == st)
2136 return 412; /* Precondition Failed */
2137 struct tm itm, *ftm = gmtime(&st->st_mtime);
2138 if (NULL == strptime(ius->ptr, "%a, %d %b %Y %H:%M:%S GMT", &itm)
2139 || mktime(ftm) > mktime(&itm)) { /* timegm() not standard */
2140 return 412; /* Precondition Failed */
2141 }
2142 }
2143
2144 return 0;
2145 }
2146
2147
2148 static void
2149 webdav_response_etag (server *srv, connection * const con, struct stat *st)
2150 {
2151 if (0 != con->etag_flags) {
2152 buffer *etagb = con->physical.etag;
2153 etag_create(etagb, st, con->etag_flags);
2154 stat_cache_update_entry(srv,CONST_BUF_LEN(con->physical.path),st,etagb);
2155 etag_mutate(etagb, etagb);
2156 http_header_response_set(con, HTTP_HEADER_ETAG,
2157 CONST_STR_LEN("ETag"),
2158 CONST_BUF_LEN(etagb));
2159 }
2160 }
2161
2162
2163 static int
2164 webdav_parse_Depth (connection * const con)
2165 {
2166 /* Depth = "Depth" ":" ("0" | "1" | "infinity") */
2167 const buffer * const h =
2168 http_header_request_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Depth"));
2169 if (NULL != h) {
2170 /* (leading LWS is removed during header parsing in request.c) */
2171 switch (*h->ptr) {
2172 case '0': return 0;
2173 case '1': return 1;
2174 /*case 'i':*/ /* e.g. "infinity" */
2175 /*case 'I':*/ /* e.g. "Infinity" */
2176 default: return -1;/* treat not-'0' and not-'1' as "infinity" */
2177 }
2178 }
2179
2180 return -1; /* default value is -1 to represent "infinity" */
2181 }
2182
2183
2184 static int
2185 webdav_unlinkat (const plugin_config * const pconf, const buffer * const uri,
2186 const int dfd, const char * const d_name, size_t len)
2187 {
2188 if (0 == unlinkat(dfd, d_name, 0)) {
2189 stat_cache_delete_entry(pconf->srv, d_name, len);
2190 return webdav_prop_delete_uri(pconf, uri);
2191 }
2192
2193 switch(errno) {
2194 case EACCES: case EPERM: return 403; /* Forbidden */
2195 case ENOENT: return 404; /* Not Found */
2196 default: return 501; /* Not Implemented */
2197 }
2198 }
2199
2200
2201 static int
2202 webdav_delete_file (const plugin_config * const pconf,
2203 const physical_st * const dst)
2204 {
2205 if (0 == unlink(dst->path->ptr)) {
2206 stat_cache_delete_entry(pconf->srv, CONST_BUF_LEN(dst->path));
2207 return webdav_prop_delete_uri(pconf, dst->rel_path);
2208 }
2209
2210 switch(errno) {
2211 case EACCES: case EPERM: return 403; /* Forbidden */
2212 case ENOENT: return 404; /* Not Found */
2213 default: return 501; /* Not Implemented */
2214 }
2215 }
2216
2217
2218 static int
2219 webdav_delete_dir (const plugin_config * const pconf,
2220 physical_st * const dst,
2221 buffer * const b,
2222 const int flags)
2223 {
2224 int multi_status = 0;
2225 const int dfd = fdevent_open_dirname(dst->path->ptr, 0);
2226 DIR * const dir = (dfd >= 0) ? fdopendir(dfd) : NULL;
2227 if (NULL == dir) {
2228 if (dfd >= 0) close(dfd);
2229 webdav_xml_response_status(b, dst->rel_path, 403);
2230 return 1;
2231 }
2232
2233 /* dst is modified in place to extend path,
2234 * so be sure to restore to base each loop iter */
2235 const uint32_t dst_path_used = dst->path->used;
2236 const uint32_t dst_rel_path_used = dst->rel_path->used;
2237 int s_isdir;
2238 struct dirent *de;
2239 while (NULL != (de = readdir(dir))) {
2240 if (de->d_name[0] == '.'
2241 && (de->d_name[1] == '\0'
2242 || (de->d_name[1] == '.' && de->d_name[2] == '\0')))
2243 continue; /* ignore "." and ".." */
2244
2245 #ifdef _DIRENT_HAVE_D_TYPE
2246 if (de->d_type != DT_UNKNOWN)
2247 s_isdir = (de->d_type == DT_DIR);
2248 else
2249 #endif
2250 {
2251 struct stat st;
2252 if (0 != fstatat(dfd, de->d_name, &st, AT_SYMLINK_NOFOLLOW))
2253 continue; /* file *just* disappeared? */
2254 /* parent rmdir() will fail later if file still exists
2255 * and fstatat() failed for other reasons */
2256 s_isdir = S_ISDIR(st.st_mode);
2257 }
2258
2259 const uint32_t len = (uint32_t) _D_EXACT_NAMLEN(de);
2260 if (flags & WEBDAV_FLAG_LC_NAMES) /*(needed at least for rel_path)*/
2261 webdav_str_len_to_lower(de->d_name, len);
2262 buffer_append_string_len(dst->path, de->d_name, len);
2263 buffer_append_string_len(dst->rel_path, de->d_name, len);
2264
2265 if (s_isdir) {
2266 buffer_append_string_len(dst->path, CONST_STR_LEN("/"));
2267 buffer_append_string_len(dst->rel_path, CONST_STR_LEN("/"));
2268 multi_status |= webdav_delete_dir(pconf, dst, b, flags);
2269 }
2270 else {
2271 int status =
2272 webdav_unlinkat(pconf, dst->rel_path, dfd, de->d_name, len);
2273 if (0 != status) {
2274 webdav_xml_response_status(b, dst->rel_path, status);
2275 multi_status = 1;
2276 }
2277 }
2278
2279 dst->path->ptr[ (dst->path->used = dst_path_used) -1] = '\0';
2280 dst->rel_path->ptr[(dst->rel_path->used = dst_rel_path_used)-1] = '\0';
2281 }
2282 closedir(dir);
2283
2284 if (0 == multi_status) {
2285 int rmdir_status;
2286 if (0 == rmdir(dst->path->ptr))
2287 rmdir_status = webdav_prop_delete_uri(pconf, dst->rel_path);
2288 else {
2289 switch(errno) {
2290 case EACCES:
2291 case EPERM: rmdir_status = 403; break; /* Forbidden */
2292 case ENOENT: rmdir_status = 404; break; /* Not Found */
2293 default: rmdir_status = 501; break; /* Not Implemented */
2294 }
2295 }
2296 if (0 != rmdir_status) {
2297 webdav_xml_response_status(b, dst->rel_path, rmdir_status);
2298 multi_status = 1;
2299 }
2300 }
2301
2302 return multi_status;
2303 }
2304
2305
2306 static int
2307 webdav_linktmp_rename (const plugin_config * const pconf,
2308 const buffer * const src,
2309 const buffer * const dst)
2310 {
2311 buffer * const tmpb = pconf->tmpb;
2312 int rc = -1; /*(not zero)*/
2313
2314 buffer_copy_buffer(tmpb, dst);
2315 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
2316 buffer_append_int(tmpb, (long)getpid());
2317 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
2318 buffer_append_uint_hex_lc(tmpb, (uintptr_t)pconf); /*(stack/heap addr)*/
2319 buffer_append_string_len(tmpb, CONST_STR_LEN("~"));
2320 if (buffer_string_length(tmpb) < PATH_MAX
2321 && 0 == linkat(AT_FDCWD, src->ptr, AT_FDCWD, tmpb->ptr, 0)) {
2322
2323 rc = rename(tmpb->ptr, dst->ptr);
2324
2325 /* unconditionally unlink() src if rename() succeeds, just in case
2326 * dst previously existed and was already hard-linked to src. From
2327 * 'man -s 2 rename':
2328 * If oldpath and newpath are existing hard links referring to the
2329 * same file, then rename() does nothing, and returns a success
2330 * status.
2331 * This introduces a small race condition between the rename() and
2332 * unlink() should new file have been created at src in the middle,
2333 * though unlikely if locks are used since locks have not yet been
2334 * released. */
2335 unlink(tmpb->ptr);
2336 }
2337 return rc;
2338 }
2339
2340
2341 static int
2342 webdav_copytmp_rename (const plugin_config * const pconf,
2343 const physical_st * const src,
2344 const physical_st * const dst,
2345 const int overwrite)
2346 {
2347 buffer * const tmpb = pconf->tmpb;
2348 buffer_copy_buffer(tmpb, dst->path);
2349 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
2350 buffer_append_int(tmpb, (long)getpid());
2351 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
2352 buffer_append_uint_hex_lc(tmpb, (uintptr_t)pconf); /*(stack/heap addr)*/
2353 buffer_append_string_len(tmpb, CONST_STR_LEN("~"));
2354 if (buffer_string_length(tmpb) >= PATH_MAX)
2355 return 414; /* URI Too Long */
2356
2357 /* code does not currently support symlinks in webdav collections;
2358 * disallow symlinks as target when opening src and dst */
2359 struct stat st;
2360 const int ifd = fdevent_open_cloexec(src->path->ptr, 0, O_RDONLY, 0);
2361 if (ifd < 0)
2362 return 403; /* Forbidden */
2363 if (0 != fstat(ifd, &st) || !S_ISREG(st.st_mode)) {
2364 close(ifd);
2365 return 403; /* Forbidden */
2366 }
2367 const int ofd = fdevent_open_cloexec(tmpb->ptr, 0,
2368 O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
2369 WEBDAV_FILE_MODE);
2370 if (ofd < 0) {
2371 close(ifd);
2372 return 403; /* Forbidden */
2373 }
2374
2375 /* perform *blocking* copy (not O_NONBLOCK);
2376 * blocks server from doing any other work until after copy completes
2377 * (should reach here only if unable to use link() and rename()
2378 * due to copy/move crossing device boundaries within the workspace) */
2379 int rc = webdav_fcopyfile_sz(ifd, ofd, st.st_size);
2380
2381 close(ifd);
2382 const int wc = close(ofd);
2383
2384 if (0 != rc || 0 != wc) {
2385 /* error reading or writing files */
2386 rc = (0 != wc && wc == ENOSPC) ? 507 : 403;
2387 unlink(tmpb->ptr);
2388 return rc;
2389 }
2390
2391 #ifndef RENAME_NOREPLACE /*(renameat2() not well-supported yet)*/
2392 if (!overwrite) {
2393 struct stat stb;
2394 if (0 == lstat(dst->path->ptr, &stb) || errno != ENOENT)
2395 return 412; /* Precondition Failed */
2396 /* TOC-TOU race between lstat() and rename(),
2397 * but this is reasonable attempt to not overwrite existing entity */
2398 }
2399 if (0 == rename(tmpb->ptr, dst->path->ptr))
2400 #else
2401 if (0 == renameat2(AT_FDCWD, tmpb->ptr,
2402 AT_FDCWD, dst->path->ptr,
2403 overwrite ? 0 : RENAME_NOREPLACE))
2404 #endif
2405 {
2406 /* unconditional stat cache deletion
2407 * (not worth extra syscall/race to detect overwritten or not) */
2408 stat_cache_delete_entry(pconf->srv, CONST_BUF_LEN(dst->path));
2409 return 0;
2410 }
2411 else {
2412 const int errnum = errno;
2413 unlink(tmpb->ptr);
2414 switch (errnum) {
2415 case ENOENT:
2416 case ENOTDIR:
2417 case EISDIR: return 409; /* Conflict */
2418 case EEXIST: return 412; /* Precondition Failed */
2419 default: return 403; /* Forbidden */
2420 }
2421 }
2422 }
2423
2424
2425 static int
2426 webdav_copymove_file (const plugin_config * const pconf,
2427 const physical_st * const src,
2428 const physical_st * const dst,
2429 int * const flags)
2430 {
2431 const int overwrite = (*flags & WEBDAV_FLAG_OVERWRITE);
2432 if (*flags & WEBDAV_FLAG_MOVE_RENAME) {
2433 #ifndef RENAME_NOREPLACE /*(renameat2() not well-supported yet)*/
2434 if (!overwrite) {
2435 struct stat st;
2436 if (0 == lstat(dst->path->ptr, &st) || errno != ENOENT)
2437 return 412; /* Precondition Failed */
2438 /* TOC-TOU race between lstat() and rename(),
2439 * but this is reasonable attempt to not overwrite existing entity*/
2440 }
2441 if (0 == rename(src->path->ptr, dst->path->ptr))
2442 #else
2443 if (0 == renameat2(AT_FDCWD, src->path->ptr,
2444 AT_FDCWD, dst->path->ptr,
2445 overwrite ? 0 : RENAME_NOREPLACE))
2446 #endif
2447 {
2448 /* unconditionally unlink() src if rename() succeeds, just in case
2449 * dst previously existed and was already hard-linked to src. From
2450 * 'man -s 2 rename':
2451 * If oldpath and newpath are existing hard links referring to the
2452 * same file, then rename() does nothing, and returns a success
2453 * status.
2454 * This introduces a small race condition between the rename() and
2455 * unlink() should new file have been created at src in the middle,
2456 * though unlikely if locks are used since locks have not yet been
2457 * released. */
2458 if (overwrite) unlink(src->path->ptr);
2459 /* unconditional stat cache deletion
2460 * (not worth extra syscall/race to detect overwritten or not) */
2461 stat_cache_delete_entry(pconf->srv, CONST_BUF_LEN(dst->path));
2462 stat_cache_delete_entry(pconf->srv, CONST_BUF_LEN(src->path));
2463 webdav_prop_move_uri(pconf, src->rel_path, dst->rel_path);
2464 return 0;
2465 }
2466 else if (errno == EEXIST)
2467 return 412; /* Precondition Failed */
2468 }
2469 else if (*flags & WEBDAV_FLAG_COPY_LINK) {
2470 if (0 == linkat(AT_FDCWD, src->path->ptr, AT_FDCWD, dst->path->ptr, 0)){
2471 webdav_prop_copy_uri(pconf, src->rel_path, dst->rel_path);
2472 return 0;
2473 }
2474 else if (errno == EEXIST) {
2475 if (!overwrite)
2476 return 412; /* Precondition Failed */
2477 if (0 == webdav_linktmp_rename(pconf, src->path, dst->path)) {
2478 webdav_prop_copy_uri(pconf, src->rel_path, dst->rel_path);
2479 return 0;
2480 }
2481 }
2482 else if (errno == EXDEV) {
2483 *flags &= ~WEBDAV_FLAG_COPY_LINK;
2484 *flags |= WEBDAV_FLAG_COPY_XDEV;
2485 }
2486 }
2487
2488 /* link() or rename() failed; fall back to copy to tempfile and rename() */
2489 int status = webdav_copytmp_rename(pconf, src, dst, overwrite);
2490 if (0 == status) {
2491 webdav_prop_copy_uri(pconf, src->rel_path, dst->rel_path);
2492 if (*flags & (WEBDAV_FLAG_MOVE_RENAME|WEBDAV_FLAG_MOVE_XDEV))
2493 webdav_delete_file(pconf, src);
2494 /*(copy successful, but how should we report if delete fails?)*/
2495 }
2496 return status;
2497 }
2498
2499
2500 static int
2501 webdav_mkdir (const plugin_config * const pconf,
2502 const physical_st * const dst,
2503 const int overwrite)
2504 {
2505 if (0 == mkdir(dst->path->ptr, WEBDAV_DIR_MODE))
2506 return 0;
2507
2508 switch (errno) {
2509 case EEXIST:
2510 case ENOTDIR: break;
2511 case ENOENT: return 409; /* Conflict */
2512 case EPERM:
2513 default: return 403; /* Forbidden */
2514 }
2515
2516 /* [RFC4918] 9.3.1 MKCOL Status Codes
2517 * 405 (Method Not Allowed) -
2518 * MKCOL can only be executed on an unmapped URL.
2519 */
2520 if (overwrite < 0) /*(mod_webdav_mkcol() passes overwrite = -1)*/
2521 return (errno != ENOTDIR)
2522 ? 405 /* Method Not Allowed */
2523 : 409; /* Conflict */
2524
2525 #ifdef __COVERITY__
2526 force_assert(2 <= dst->path->used);
2527 force_assert(2 <= dst->rel_path->used);
2528 #endif
2529
2530 struct stat st;
2531 int status;
2532 dst->path->ptr[dst->path->used-2] = '\0'; /*(trailing slash)*/
2533 status = lstat(dst->path->ptr, &st);
2534 dst->path->ptr[dst->path->used-2] = '/'; /*(restore slash)*/
2535 if (0 != status) /* still ENOTDIR or *just* disappeared */
2536 return 409; /* Conflict */
2537
2538 if (!overwrite) /* copying into a non-dir ? */
2539 return 409; /* Conflict */
2540
2541 if (S_ISDIR(st.st_mode))
2542 return 0;
2543
2544 dst->path->ptr[dst->path->used-2] = '\0'; /*(trailing slash)*/
2545 dst->rel_path->ptr[dst->rel_path->used-2] = '\0';
2546 status = webdav_delete_file(pconf, dst);
2547 dst->path->ptr[dst->path->used-2] = '/'; /*(restore slash)*/
2548 dst->rel_path->ptr[dst->rel_path->used-2] = '/';
2549 if (0 != status)
2550 return status;
2551
2552 return (0 == mkdir(dst->path->ptr, WEBDAV_DIR_MODE))
2553 ? 0
2554 : 409; /* Conflict */
2555 }
2556
2557
2558 static int
2559 webdav_copymove_dir (const plugin_config * const pconf,
2560 physical_st * const src,
2561 physical_st * const dst,
2562 buffer * const b,
2563 int flags)
2564 {
2565 /* NOTE: merging collections is NON-CONFORMANT behavior
2566 * (specified in [RFC4918])
2567 *
2568 * However, merging collections during COPY/MOVE might be expected behavior
2569 * by client, as merging is the behavior of unix cp -r (recursive copy) as
2570 * well as how Microsoft Windows Explorer performs folder copies.
2571 *
2572 * [RFC4918] 9.8.4 COPY and Overwriting Destination Resources
2573 * When a collection is overwritten, the membership of the destination
2574 * collection after the successful COPY request MUST be the same
2575 * membership as the source collection immediately before the COPY. Thus,
2576 * merging the membership of the source and destination collections
2577 * together in the destination is not a compliant behavior.
2578 * [Ed: strange how non-compliance statement is immediately followed by:]
2579 * In general, if clients require the state of the destination URL to be
2580 * wiped out prior to a COPY (e.g., to force live properties to be reset),
2581 * then the client could send a DELETE to the destination before the COPY
2582 * request to ensure this reset.
2583 * [Ed: if non-compliant merge behavior is the default here, and were it to
2584 * not be desired by client, client could send a DELETE to the destination
2585 * before issuing COPY. There is no easy way to obtain merge behavior
2586 * (were it not the non-compliant default here) unless the client recurses
2587 * into the source and destination, and creates a list of objects that need
2588 * to be copied. This could fail or miss files due to racing with other
2589 * clients. All of this might forget to emphasize that wiping out an
2590 * existing destination collection (a recursive operation) is dangerous and
2591 * would happen if the client set Overwrite: T or omitted setting Overwrite
2592 * since Overwrite: T is default (client must explicitly set Overwrite: F)]
2593 * [RFC4918] 9.9.3 MOVE and the Overwrite Header
2594 * If a resource exists at the destination and the Overwrite header is
2595 * "T", then prior to performing the move, the server MUST perform a
2596 * DELETE with "Depth: infinity" on the destination resource. If the
2597 * Overwrite header is set to "F", then the operation will fail.
2598 */
2599
2600 /* NOTE: aborting if 507 Insufficient Storage is NON-CONFORMANT behavior
2601 * [RFC4918] specifies that as much as possible of COPY or MOVE
2602 * should be completed.
2603 */
2604
2605 /* ??? upon encountering errors, should src->rel_path or dst->rel_path
2606 * be used in XML error ??? */
2607
2608 struct stat st;
2609 int status;
2610 int dfd;
2611
2612 int make_destdir = 1;
2613 const int overwrite = (flags & WEBDAV_FLAG_OVERWRITE);
2614 if (flags & WEBDAV_FLAG_MOVE_RENAME) {
2615 #ifndef RENAME_NOREPLACE /*(renameat2() not well-supported yet)*/
2616 if (!overwrite) {
2617 if (0 == lstat(dst->path->ptr, &st) || errno != ENOENT) {
2618 webdav_xml_response_status(b, src->rel_path, 412);
2619 return 412; /* Precondition Failed */
2620 }
2621 /* TOC-TOU race between lstat() and rename(),
2622 * but this is reasonable attempt to not overwrite existing entity*/
2623 }
2624 if (0 == rename(src->path->ptr, dst->path->ptr))
2625 #else
2626 if (0 == renameat2(AT_FDCWD, src->path->ptr,
2627 AT_FDCWD, dst->path->ptr,
2628 overwrite ? 0 : RENAME_NOREPLACE))
2629 #endif
2630 {
2631 webdav_prop_move_uri_col(pconf, src->rel_path, dst->rel_path);
2632 return 0;
2633 }
2634 else {
2635 switch (errno) {
2636 case EEXIST:
2637 case ENOTEMPTY:
2638 if (!overwrite) {
2639 webdav_xml_response_status(b, src->rel_path, 412);
2640 return 412; /* Precondition Failed */
2641 }
2642 make_destdir = 0;
2643 break;
2644 case ENOTDIR:
2645 if (!overwrite) {
2646 webdav_xml_response_status(b, src->rel_path, 409);
2647 return 409; /* Conflict */
2648 }
2649
2650 #ifdef __COVERITY__
2651 force_assert(2 <= dst->path->used);
2652 #endif
2653
2654 dst->path->ptr[dst->path->used-2] = '\0'; /*(trailing slash)*/
2655 status = lstat(dst->path->ptr, &st);
2656 dst->path->ptr[dst->path->used-2] = '/'; /*(restore slash)*/
2657 if (0 == status) {
2658 if (S_ISDIR(st.st_mode)) {
2659 make_destdir = 0;
2660 break;
2661 }
2662
2663 #ifdef __COVERITY__
2664 force_assert(2 <= dst->rel_path->used);
2665 #endif
2666
2667 dst->path->ptr[dst->path->used-2] = '\0'; /*(remove slash)*/
2668 dst->rel_path->ptr[dst->rel_path->used-2] = '\0';
2669 status = webdav_delete_file(pconf, dst);
2670 dst->path->ptr[dst->path->used-2] = '/'; /*(restore slash)*/
2671 dst->rel_path->ptr[dst->rel_path->used-2] = '/';
2672 if (0 != status) {
2673 webdav_xml_response_status(b, src->rel_path, status);
2674 return status;
2675 }
2676
2677 if (0 == rename(src->path->ptr, dst->path->ptr)) {
2678 webdav_prop_move_uri_col(pconf, src->rel_path,
2679 dst->rel_path);
2680 return 0;
2681 }
2682 }
2683 break;
2684 case EXDEV:
2685 flags &= ~WEBDAV_FLAG_MOVE_RENAME;
2686 flags |= WEBDAV_FLAG_MOVE_XDEV;
2687 /* (if overwrite, then could switch to WEBDAV_FLAG_COPY_XDEV
2688 * and set a flag so that before returning from this routine,
2689 * directory is deleted recursively, instead of deleting each
2690 * file after each copy. Only reliable if overwrite is set
2691 * since if it is not set, an error would leave file copies in
2692 * two places and would be difficult to recover if !overwrite)
2693 * (collections typically do not cross devices, so this is not
2694 * expected to be a common case) */
2695 break;
2696 default:
2697 break;
2698 }
2699 }
2700 }
2701
2702 if (make_destdir) {
2703 if (0 != (status = webdav_mkdir(pconf, dst, overwrite))) {
2704 webdav_xml_response_status(b, src->rel_path, status);
2705 return status;
2706 }
2707 }
2708
2709 webdav_prop_copy_uri(pconf, src->rel_path, dst->rel_path);
2710
2711 /* copy from src to dst (and, if move, then delete src)
2712 * src and dst are modified in place to extend path,
2713 * so be sure to restore to base each loop iter */
2714
2715 const uint32_t src_path_used = src->path->used;
2716 const uint32_t src_rel_path_used = src->rel_path->used;
2717 const uint32_t dst_path_used = dst->path->used;
2718 const uint32_t dst_rel_path_used = dst->rel_path->used;
2719
2720 dfd = fdevent_open_dirname(src->path->ptr, 0);
2721 DIR * const srcdir = (dfd >= 0) ? fdopendir(dfd) : NULL;
2722 if (NULL == srcdir) {
2723 if (dfd >= 0) close(dfd);
2724 webdav_xml_response_status(b, src->rel_path, 403);
2725 return 403; /* Forbidden */
2726 }
2727 mode_t d_type;
2728 int multi_status = 0;
2729 struct dirent *de;
2730 while (NULL != (de = readdir(srcdir))) {
2731 if (de->d_name[0] == '.'
2732 && (de->d_name[1] == '\0'
2733 || (de->d_name[1] == '.' && de->d_name[2] == '\0')))
2734 continue; /* ignore "." and ".." */
2735
2736 #ifdef _DIRENT_HAVE_D_TYPE
2737 if (de->d_type != DT_UNKNOWN)
2738 d_type = DTTOIF(de->d_type);
2739 else
2740 #endif
2741 {
2742 if (0 != fstatat(dfd, de->d_name, &st, AT_SYMLINK_NOFOLLOW))
2743 continue; /* file *just* disappeared? */
2744 d_type = st.st_mode;
2745 }
2746
2747 const uint32_t len = (uint32_t) _D_EXACT_NAMLEN(de);
2748 if (flags & WEBDAV_FLAG_LC_NAMES) /*(needed at least for rel_path)*/
2749 webdav_str_len_to_lower(de->d_name, len);
2750
2751 buffer_append_string_len(src->path, de->d_name, len);
2752 buffer_append_string_len(dst->path, de->d_name, len);
2753 buffer_append_string_len(src->rel_path, de->d_name, len);
2754 buffer_append_string_len(dst->rel_path, de->d_name, len);
2755
2756 if (S_ISDIR(d_type)) { /* recursive call; depth first */
2757 buffer_append_string_len(src->path, CONST_STR_LEN("/"));
2758 buffer_append_string_len(dst->path, CONST_STR_LEN("/"));
2759 buffer_append_string_len(src->rel_path, CONST_STR_LEN("/"));
2760 buffer_append_string_len(dst->rel_path, CONST_STR_LEN("/"));
2761 status = webdav_copymove_dir(pconf, src, dst, b, flags);
2762 if (0 != status)
2763 multi_status = 1;
2764 }
2765 else if (S_ISREG(d_type)) {
2766 status = webdav_copymove_file(pconf, src, dst, &flags);
2767 if (0 != status)
2768 webdav_xml_response_status(b, src->rel_path, status);
2769 }
2770 #if 0
2771 else if (S_ISLNK(d_type)) {
2772 /*(might entertain support in future, including readlink()
2773 * and changing dst symlink to be relative to new location.
2774 * (or, if absolute to the old location, then absolute to new)
2775 * Be sure to hard-link using linkat() w/o AT_SYMLINK_FOLLOW)*/
2776 }
2777 #endif
2778 else {
2779 status = 0;
2780 }
2781
2782 src->path->ptr[ (src->path->used = src_path_used) -1] = '\0';
2783 src->rel_path->ptr[(src->rel_path->used = src_rel_path_used)-1] = '\0';
2784 dst->path->ptr[ (dst->path->used = dst_path_used) -1] = '\0';
2785 dst->rel_path->ptr[(dst->rel_path->used = dst_rel_path_used)-1] = '\0';
2786
2787 if (507 == status) {
2788 multi_status = 507; /* Insufficient Storage */
2789 break;
2790 }
2791 }
2792 closedir(srcdir);
2793
2794 if (0 == multi_status) {
2795 if (flags & (WEBDAV_FLAG_MOVE_RENAME|WEBDAV_FLAG_MOVE_XDEV)) {
2796 status = webdav_delete_dir(pconf, src, b, flags); /* content */
2797 if (0 != status) {
2798 webdav_xml_response_status(b, src->rel_path, status);
2799 multi_status = 1;
2800 }
2801 }
2802 }
2803
2804 return multi_status;
2805 }
2806
2807
2808 typedef struct webdav_propfind_bufs {
2809 connection * restrict con;
2810 const plugin_config * restrict pconf;
2811 physical_st * restrict dst;
2812 buffer * restrict b;
2813 buffer * restrict b_200;
2814 buffer * restrict b_404;
2815 webdav_property_names proplist;
2816 int allprop;
2817 int propname;
2818 int lockdiscovery;
2819 int depth;
2820 struct stat st;
2821 } webdav_propfind_bufs;
2822
2823
2824 enum webdav_live_props_e {
2825 WEBDAV_PROP_UNSET = -1 /* (enum value to avoid compiler warning)*/
2826 ,WEBDAV_PROP_ALL = 0 /* (ALL not really a prop; internal use) */
2827 /*,WEBDAV_PROP_CREATIONDATE*/ /* (located in database, if present) */
2828 /*,WEBDAV_PROP_DISPLAYNAME*/ /* (located in database, if present) */
2829 /*,WEBDAV_PROP_GETCONTENTLANGUAGE*/ /* (located in database, if present) */
2830 ,WEBDAV_PROP_GETCONTENTLENGTH
2831 ,WEBDAV_PROP_GETCONTENTTYPE
2832 ,WEBDAV_PROP_GETETAG
2833 ,WEBDAV_PROP_GETLASTMODIFIED
2834 /*,WEBDAV_PROP_LOCKDISCOVERY*/ /* (located in database, if present) */
2835 ,WEBDAV_PROP_RESOURCETYPE
2836 /*,WEBDAV_PROP_SOURCE*/ /* not implemented; removed in RFC4918 */
2837 ,WEBDAV_PROP_SUPPORTEDLOCK
2838 };
2839
2840
2841 #ifdef USE_PROPPATCH
2842
2843 struct live_prop_list {
2844 const char *prop;
2845 const uint32_t len;
2846 enum webdav_live_props_e pnum;
2847 };
2848
2849 static const struct live_prop_list live_properties[] = { /*(namespace "DAV:")*/
2850 /* { CONST_STR_LEN("creationdate"), WEBDAV_PROP_CREATIONDATE }*/
2851 /*,{ CONST_STR_LEN("displayname"), WEBDAV_PROP_DISPLAYNAME }*/
2852 /*,{ CONST_STR_LEN("getcontentlanguage"), WEBDAV_PROP_GETCONTENTLANGUAGE}*/
2853 { CONST_STR_LEN("getcontentlength"), WEBDAV_PROP_GETCONTENTLENGTH }
2854 ,{ CONST_STR_LEN("getcontenttype"), WEBDAV_PROP_GETCONTENTTYPE }
2855 ,{ CONST_STR_LEN("getetag"), WEBDAV_PROP_GETETAG }
2856 ,{ CONST_STR_LEN("getlastmodified"), WEBDAV_PROP_GETLASTMODIFIED }
2857 #ifdef USE_LOCKS
2858 /*,{ CONST_STR_LEN("lockdiscovery"), WEBDAV_PROP_LOCKDISCOVERY }*/
2859 #endif
2860 ,{ CONST_STR_LEN("resourcetype"), WEBDAV_PROP_RESOURCETYPE }
2861 /*,{ CONST_STR_LEN("source"), WEBDAV_PROP_SOURCE }*/
2862 #ifdef USE_LOCKS
2863 ,{ CONST_STR_LEN("supportedlock"), WEBDAV_PROP_SUPPORTEDLOCK }
2864 #endif
2865
2866 ,{ NULL, 0, WEBDAV_PROP_UNSET }
2867 };
2868
2869 /* protected live properties
2870 * (must also protect creationdate and lockdiscovery in database) */
2871 static const struct live_prop_list protected_props[] = { /*(namespace "DAV:")*/
2872 { CONST_STR_LEN("creationdate"), WEBDAV_PROP_UNSET
2873 /*WEBDAV_PROP_CREATIONDATE*/ }
2874 /*,{ CONST_STR_LEN("displayname"), WEBDAV_PROP_DISPLAYNAME }*/
2875 /*,{ CONST_STR_LEN("getcontentlanguage"), WEBDAV_PROP_GETCONTENTLANGUAGE}*/
2876 ,{ CONST_STR_LEN("getcontentlength"), WEBDAV_PROP_GETCONTENTLENGTH }
2877 ,{ CONST_STR_LEN("getcontenttype"), WEBDAV_PROP_GETCONTENTTYPE }
2878 ,{ CONST_STR_LEN("getetag"), WEBDAV_PROP_GETETAG }
2879 ,{ CONST_STR_LEN("getlastmodified"), WEBDAV_PROP_GETLASTMODIFIED }
2880 ,{ CONST_STR_LEN("lockdiscovery"), WEBDAV_PROP_UNSET
2881 /*WEBDAV_PROP_LOCKDISCOVERY*/ }
2882 ,{ CONST_STR_LEN("resourcetype"), WEBDAV_PROP_RESOURCETYPE }
2883 /*,{ CONST_STR_LEN("source"), WEBDAV_PROP_SOURCE }*/
2884 ,{ CONST_STR_LEN("supportedlock"), WEBDAV_PROP_SUPPORTEDLOCK }
2885
2886 ,{ NULL, 0, WEBDAV_PROP_UNSET }
2887 };
2888
2889 #endif
2890
2891
2892 static int
2893 webdav_propfind_live_props (const webdav_propfind_bufs * const restrict pb,
2894 const enum webdav_live_props_e pnum)
2895 {
2896 buffer * const restrict b = pb->b_200;
2897 switch (pnum) {
2898 case WEBDAV_PROP_ALL:
2899 /*(fall through)*/
2900 /*case WEBDAV_PROP_CREATIONDATE:*/ /* (located in database, if present)*/
2901 #if 0
2902 case WEBDAV_PROP_CREATIONDATE: {
2903 /* st->st_ctim
2904 * defined by POSIX.1-2008 as last file status change timestamp
2905 * and is no long create-time (as it may have been on older filesystems)
2906 * Therefore, this should return Not Found.
2907 * [RFC4918] 15.1 creationdate Property
2908 * The DAV:creationdate property SHOULD be defined on all DAV
2909 * compliant resources. If present, it contains a timestamp of the
2910 * moment when the resource was created. Servers that are incapable
2911 * of persistently recording the creation date SHOULD instead leave
2912 * it undefined (i.e. report "Not Found").
2913 * (future: might store creationdate in database when PUT creates file
2914 * or LOCK creates empty file, or MKCOL creates collection (dir),
2915 * i.e. wherever the status is 201 Created)
2916 */
2917 struct tm tm;
2918 char ctime_buf[sizeof("2005-08-18T07:27:16Z")];
2919 if (__builtin_expect( (NULL != gmtime_r(&pb->st.st_ctime, &tm)), 1)) {
2920 buffer_append_string_len(b, CONST_STR_LEN(
2921 "<D:creationdate ns0:dt=\"dateTime.tz\">"));
2922 buffer_append_string_len(b, ctime_buf,
2923 strftime(ctime_buf, sizeof(ctime_buf),
2924 "%Y-%m-%dT%TZ", &tm));
2925 buffer_append_string_len(b, CONST_STR_LEN(
2926 "</D:creationdate>"));
2927 }
2928 else if (pnum != WEBDAV_PROP_ALL)
2929 return -1; /* invalid; report 'not found' */
2930 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
2931 __attribute_fallthrough__
2932 }
2933 #endif
2934 /*case WEBDAV_PROP_DISPLAYNAME:*/ /* (located in database, if present)*/
2935 /*case WEBDAV_PROP_GETCONTENTLANGUAGE:*/ /* (located in db, if present)*/
2936 #if 0
2937 case WEBDAV_PROP_GETCONTENTLANGUAGE:
2938 /* [RFC4918] 15.3 getcontentlanguage Property
2939 * SHOULD NOT be protected, so that clients can reset the language.
2940 * [...]
2941 * The DAV:getcontentlanguage property MUST be defined on any
2942 * DAV-compliant resource that returns the Content-Language header on
2943 * a GET.
2944 * (future: server does not currently set Content-Language and this
2945 * module would need to somehow find out if another module set it)
2946 */
2947 buffer_append_string_len(b, CONST_STR_LEN(
2948 "<D:getcontentlanguage>en</D:getcontentlanguage>"));
2949 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
2950 __attribute_fallthrough__
2951 #endif
2952 case WEBDAV_PROP_GETCONTENTLENGTH:
2953 buffer_append_string_len(b, CONST_STR_LEN(
2954 "<D:getcontentlength>"));
2955 buffer_append_int(b, pb->st.st_size);
2956 buffer_append_string_len(b, CONST_STR_LEN(
2957 "</D:getcontentlength>"));
2958 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
2959 __attribute_fallthrough__
2960 case WEBDAV_PROP_GETCONTENTTYPE:
2961 /* [RFC4918] 15.5 getcontenttype Property
2962 * Potentially protected if the server prefers to assign content types
2963 * on its own (see also discussion in Section 9.7.1).
2964 * (server currently assigns content types)
2965 *
2966 * [RFC4918] 15 DAV Properties
2967 * For properties defined based on HTTP GET response headers
2968 * (DAV:get*), the header value could include LWS as defined
2969 * in [RFC2616], Section 4.2. Server implementors SHOULD strip
2970 * LWS from these values before using as WebDAV property
2971 * values.
2972 * e.g. application/xml;charset="utf-8"
2973 * instead of: application/xml; charset="utf-8"
2974 * (documentation-only; no check is done here to remove LWS)
2975 */
2976 if (S_ISDIR(pb->st.st_mode)) {
2977 buffer_append_string_len(b, CONST_STR_LEN(
2978 "<D:getcontenttype>httpd/unix-directory</D:getcontenttype>"));
2979 }
2980 else {
2981 /* provide content type by extension
2982 * Note: not currently supporting filesystem xattr */
2983 const buffer *ct =
2984 stat_cache_mimetype_by_ext(pb->con, CONST_BUF_LEN(pb->dst->path));
2985 if (NULL != ct) {
2986 buffer_append_string_len(b, CONST_STR_LEN(
2987 "<D:getcontenttype>"));
2988 buffer_append_string_buffer(b, ct);
2989 buffer_append_string_len(b, CONST_STR_LEN(
2990 "</D:getcontenttype>"));
2991 }
2992 else {
2993 if (pnum != WEBDAV_PROP_ALL)
2994 return -1; /* invalid; report 'not found' */
2995 }
2996 }
2997 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
2998 __attribute_fallthrough__
2999 case WEBDAV_PROP_GETETAG:
3000 if (0 != pb->con->etag_flags) {
3001 buffer *etagb = pb->con->physical.etag;
3002 etag_create(etagb, &pb->st, pb->con->etag_flags);
3003 etag_mutate(etagb, etagb);
3004 buffer_append_string_len(b, CONST_STR_LEN(
3005 "<D:getetag>"));
3006 buffer_append_string_buffer(b, etagb);
3007 buffer_append_string_len(b, CONST_STR_LEN(
3008 "</D:getetag>"));
3009 buffer_clear(etagb);
3010 }
3011 else if (pnum != WEBDAV_PROP_ALL)
3012 return -1; /* invalid; report 'not found' */
3013 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
3014 __attribute_fallthrough__
3015 case WEBDAV_PROP_GETLASTMODIFIED:
3016 {
3017 buffer_append_string_len(b, CONST_STR_LEN(
3018 "<D:getlastmodified ns0:dt=\"dateTime.rfc1123\">"));
3019 buffer_append_strftime(b, "%a, %d %b %Y %H:%M:%S GMT",
3020 gmtime(&pb->st.st_mtime));
3021 buffer_append_string_len(b, CONST_STR_LEN(
3022 "</D:getlastmodified>"));
3023 }
3024 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
3025 __attribute_fallthrough__
3026 #if 0
3027 #ifdef USE_LOCKS
3028 case WEBDAV_PROP_LOCKDISCOVERY:
3029 /* database query for locks occurs in webdav_propfind_resource_props()*/
3030 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
3031 __attribute_fallthrough__
3032 #endif
3033 #endif
3034 case WEBDAV_PROP_RESOURCETYPE:
3035 if (S_ISDIR(pb->st.st_mode))
3036 buffer_append_string_len(b, CONST_STR_LEN(
3037 "<D:resourcetype><D:collection/></D:resourcetype>"));
3038 else
3039 buffer_append_string_len(b, CONST_STR_LEN(
3040 "<D:resourcetype/>"));
3041 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
3042 __attribute_fallthrough__
3043 /*case WEBDAV_PROP_SOURCE:*/ /* not impl; removed in RFC4918 */
3044 #ifdef USE_LOCKS
3045 case WEBDAV_PROP_SUPPORTEDLOCK:
3046 buffer_append_string_len(b, CONST_STR_LEN(
3047 "<D:supportedlock>"
3048 "<D:lockentry>"
3049 "<D:lockscope><D:exclusive/></D:lockscope>"
3050 "<D:locktype><D:write/></D:locktype>"
3051 "</D:lockentry>"
3052 "<D:lockentry>"
3053 "<D:lockscope><D:shared/></D:lockscope>"
3054 "<D:locktype><D:write/></D:locktype>"
3055 "</D:lockentry>"
3056 "</D:supportedlock>"));
3057 if (pnum != WEBDAV_PROP_ALL) return 0;/* found *//*(else fall through)*/
3058 __attribute_fallthrough__
3059 #endif
3060 default: /* WEBDAV_PROP_UNSET */
3061 return -1; /* not found */
3062 }
3063 return 0; /* found (WEBDAV_PROP_ALL) */
3064 }
3065
3066
3067 #ifdef USE_LOCKS
3068 static void
3069 webdav_propfind_lockdiscovery_cb (void * const vdata,
3070 const webdav_lockdata * const lockdata)
3071 {
3072 webdav_xml_activelock((buffer *)vdata, lockdata, NULL, 0);
3073 }
3074 #endif
3075
3076
3077 static void
3078 webdav_propfind_resource_props (const webdav_propfind_bufs * const restrict pb)
3079 {
3080 const webdav_property_names * const props = &pb->proplist;
3081 if (props->used) { /* "props" or "allprop"+"include" */
3082 const webdav_property_name *prop = props->ptr;
3083 for (int i = 0; i < props->used; ++i, ++prop) {
3084 if (NULL == prop->name /*(flag indicating prop is live prop enum)*/
3085 ? 0 == webdav_propfind_live_props(pb, (enum webdav_live_props_e)
3086 prop->namelen)
3087 : 0 == webdav_prop_select_prop(pb->pconf, pb->dst->rel_path,
3088 prop, pb->b_200))
3089 continue;
3090
3091 /*(error obtaining prop if reached)*/
3092 webdav_xml_prop(pb->b_404, prop, NULL, 0);
3093 }
3094 }
3095
3096 if (pb->allprop) {
3097 webdav_propfind_live_props(pb, WEBDAV_PROP_ALL);
3098 webdav_prop_select_props(pb->pconf, pb->dst->rel_path, pb->b_200);
3099 }
3100
3101 #ifdef USE_LOCKS
3102 if (pb->lockdiscovery) {
3103 /* pb->lockdiscovery > 0:
3104 * report locks resource or containing (parent) collections
3105 * pb->lockdiscovery < 0:
3106 * report only those locks on specific resource
3107 * While this is not compliant with RFC, it may reduces quite a bit of
3108 * redundancy for propfind on Depth: 1 and Depth: infinity when there
3109 * are locks on parent collections. The client receiving this propfind
3110 * XML response should easily know that locks on collections apply to
3111 * the members of those collections and to further nested collections
3112 *
3113 * future: might be many, many fewer database queries if make a single
3114 * query for the locks in the collection directory tree and parse the
3115 * results, rather than querying the database for each resource */
3116 buffer_append_string_len(pb->b_200, CONST_STR_LEN(
3117 "<D:lockdiscovery>"));
3118 webdav_lock_activelocks(pb->pconf, pb->dst->rel_path,
3119 (pb->lockdiscovery > 0),
3120 webdav_propfind_lockdiscovery_cb, pb->b_200);
3121 buffer_append_string_len(pb->b_200, CONST_STR_LEN(
3122 "</D:lockdiscovery>"));
3123 }
3124 #endif
3125 }
3126
3127
3128 static void
3129 webdav_propfind_resource_propnames (const webdav_propfind_bufs *
3130 const restrict pb)
3131 {
3132 static const char live_propnames[] =
3133 "<getcontentlength/>\n"
3134 "<getcontenttype/>\n"
3135 "<getetag/>\n"
3136 "<getlastmodified/>\n"
3137 "<resourcetype/>\n"
3138 #ifdef USE_LOCKS
3139 "<supportedlock/>\n"
3140 "<lockdiscovery/>\n"
3141 #endif
3142 ;
3143 /* list live_properties which are not in database, plus "lockdiscovery" */
3144 buffer_append_string_len(pb->b_200,live_propnames,sizeof(live_propnames)-1);
3145
3146 /* list properties in database 'properties' table for resource */
3147 webdav_prop_select_propnames(pb->pconf, pb->dst->rel_path, pb->b_200);
3148 }
3149
3150
3151 __attribute_cold__
3152 static void
3153 webdav_propfind_resource_403 (const webdav_propfind_bufs * const restrict pb)
3154 {
3155 buffer * const restrict b = pb->b;
3156 buffer_append_string_len(b, CONST_STR_LEN(
3157 "<D:response>\n"));
3158 webdav_xml_href(b, pb->dst->rel_path);
3159 buffer_append_string_len(b, CONST_STR_LEN(
3160 "<D:propstat>\n"));
3161 webdav_xml_status(b, 403); /* Forbidden */
3162 buffer_append_string_len(b, CONST_STR_LEN(
3163 "</D:propstat>\n"
3164 "</D:response>\n"));
3165 }
3166
3167
3168 static void
3169 webdav_propfind_resource (const webdav_propfind_bufs * const restrict pb)
3170 {
3171 buffer_clear(pb->b_200);
3172 buffer_clear(pb->b_404);
3173
3174 if (!pb->propname)
3175 webdav_propfind_resource_props(pb);
3176 else
3177 webdav_propfind_resource_propnames(pb);
3178
3179 /* buffer could get very large for large directory (or Depth: infinity)
3180 * attempt to allocate in 8K chunks, rather than default realloc in
3181 * 64-byte chunks (see buffer.h) which will lead to exponentially more
3182 * expensive copy behavior as buffer is resized over and over and over
3183 *
3184 * future: avoid (potential) excessive memory usage by accumulating output
3185 * in temporary file
3186 */
3187 buffer * const restrict b = pb->b;
3188 buffer * const restrict b_200 = pb->b_200;
3189 buffer * const restrict b_404 = pb->b_404;
3190 if (b->size - b->used < b_200->used + b_404->used + 1024) {
3191 size_t sz = b->used + BUFFER_MAX_REUSE_SIZE
3192 + b_200->used + b_404->used + 1024;
3193 /*(optimization; buffer is extended as needed)*/
3194 buffer_string_prepare_append(b, sz & (BUFFER_MAX_REUSE_SIZE-1));
3195 }
3196
3197 buffer_append_string_len(b, CONST_STR_LEN(
3198 "<D:response>\n"));
3199 webdav_xml_href(b, pb->dst->rel_path);
3200 if (b_200->used > 1) /* !unset and !blank */
3201 webdav_xml_propstat(b, b_200, 200);
3202 if (b_404->used > 1) /* !unset and !blank */
3203 webdav_xml_propstat(b, b_404, 404);
3204 buffer_append_string_len(b, CONST_STR_LEN(
3205 "</D:response>\n"));
3206 }
3207
3208
3209 static void
3210 webdav_propfind_dir (webdav_propfind_bufs * const restrict pb)
3211 {
3212 const physical_st * const dst = pb->dst;
3213 const int dfd = fdevent_open_dirname(dst->path->ptr, 0);
3214 DIR * const dir = (dfd >= 0) ? fdopendir(dfd) : NULL;
3215 if (NULL == dir) {
3216 int errnum = errno;
3217 if (dfd >= 0) close(dfd);
3218 if (errnum != ENOENT)
3219 webdav_propfind_resource_403(pb); /* Forbidden */
3220 return;
3221 }
3222
3223 webdav_propfind_resource(pb);
3224
3225 if (pb->lockdiscovery > 0)
3226 pb->lockdiscovery = -pb->lockdiscovery; /*(check locks on node only)*/
3227
3228 /* dst is modified in place to extend path,
3229 * so be sure to restore to base each loop iter */
3230 const uint32_t dst_path_used = dst->path->used;
3231 const uint32_t dst_rel_path_used = dst->rel_path->used;
3232 const int flags =
3233 (pb->con->conf.force_lowercase_filenames ? WEBDAV_FLAG_LC_NAMES : 0);
3234 struct dirent *de;
3235 while (NULL != (de = readdir(dir))) {
3236 if (de->d_name[0] == '.'
3237 && (de->d_name[1] == '\0'
3238 || (de->d_name[1] == '.' && de->d_name[2] == '\0')))
3239 continue; /* ignore "." and ".." */
3240
3241 if (0 != fstatat(dfd, de->d_name, &pb->st, AT_SYMLINK_NOFOLLOW))
3242 continue; /* file *just* disappeared? */
3243
3244 const uint32_t len = (uint32_t) _D_EXACT_NAMLEN(de);
3245 if (flags & WEBDAV_FLAG_LC_NAMES) /*(needed by rel_path)*/
3246 webdav_str_len_to_lower(de->d_name, len);
3247 buffer_append_string_len(dst->path, de->d_name, len);
3248 buffer_append_string_len(dst->rel_path, de->d_name, len);
3249 if (S_ISDIR(pb->st.st_mode)) {
3250 buffer_append_string_len(dst->path, CONST_STR_LEN("/"));
3251 buffer_append_string_len(dst->rel_path, CONST_STR_LEN("/"));
3252 }
3253
3254 if (S_ISDIR(pb->st.st_mode) && -1 == pb->depth)
3255 webdav_propfind_dir(pb); /* recurse */
3256 else
3257 webdav_propfind_resource(pb);
3258
3259 dst->path->ptr[ (dst->path->used = dst_path_used) -1] = '\0';
3260 dst->rel_path->ptr[(dst->rel_path->used = dst_rel_path_used)-1] = '\0';
3261 }
3262 closedir(dir);
3263 }
3264
3265
3266 static int
3267 webdav_open_chunk_file_rd (chunk * const c)
3268 {
3269 if (c->file.fd < 0) /* open file if not already open *//*permit symlink*/
3270 c->file.fd = fdevent_open_cloexec(c->mem->ptr, 1, O_RDONLY, 0);
3271 return c->file.fd;
3272 }
3273
3274
3275 static int
3276 webdav_mmap_file_rd (void ** const addr, const size_t length,
3277 const int fd, const off_t offset)
3278 {
3279 /*(caller must ensure offset is properly aligned to mmap requirements)*/
3280
3281 if (0 == length) {
3282 *addr = NULL; /*(something other than MAP_FAILED)*/
3283 return 0;
3284 }
3285
3286 #ifdef HAVE_MMAP
3287
3288 *addr = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, offset);
3289 if (*addr == MAP_FAILED && errno == EINVAL)
3290 *addr = mmap(NULL, length, PROT_READ, MAP_PRIVATE, fd, offset);
3291 return (*addr != MAP_FAILED ? 0 : -1);
3292
3293 #else
3294
3295 return -1;
3296
3297 #endif
3298 }
3299
3300
3301 static char *
3302 webdav_mmap_file_chunk (chunk * const c)
3303 {
3304 /*(request body provided in temporary file, so ok to mmap().
3305 * Otherwise, must check defined(ENABLE_MMAP)) */
3306 /* chunk_reset() or chunk_free() will clean up mmap'd chunk */
3307 /* close c->file.fd only faster mmap() succeeds, since it will not
3308 * be able to be re-opened if it was a tmpfile that was unlinked */
3309 /*assert(c->type == FILE_CHUNK);*/
3310 if (MAP_FAILED != c->file.mmap.start)
3311 return c->file.mmap.start + c->offset;
3312
3313 if (webdav_open_chunk_file_rd(c) < 0)
3314 return NULL;
3315
3316 webdav_mmap_file_rd((void **)&c->file.mmap.start, (size_t)c->file.length,
3317 c->file.fd, 0);
3318
3319 if (MAP_FAILED == c->file.mmap.start)
3320 return NULL;
3321
3322 close(c->file.fd);
3323 c->file.fd = -1;
3324 c->file.mmap.length = c->file.length;
3325 return c->file.mmap.start + c->offset;
3326 }
3327
3328
3329 #if defined(USE_PROPPATCH) || defined(USE_LOCKS)
3330 __attribute_noinline__
3331 static xmlDoc *
3332 webdav_parse_chunkqueue (connection * const con,
3333 const plugin_config * const pconf)
3334 {
3335 /* read the chunks in to the XML document */
3336 xmlParserCtxtPtr ctxt = xmlCreatePushParserCtxt(NULL, NULL, NULL, 0, NULL);
3337 /* XXX: evaluate adding more xmlParserOptions */
3338 xmlCtxtUseOptions(ctxt, XML_PARSE_NOERROR | XML_PARSE_NOWARNING
3339 | XML_PARSE_PEDANTIC| XML_PARSE_NONET);
3340 char *xmlstr;
3341 chunkqueue * const cq = con->request_content_queue;
3342 size_t weWant = cq->bytes_in - cq->bytes_out;
3343 int err = XML_ERR_OK;
3344
3345 while (weWant) {
3346 size_t weHave = 0;
3347 chunk *c = cq->first;
3348 char buf[16384];
3349 #ifdef __COVERITY__
3350 force_assert(0 == weWant || c != NULL);
3351 #endif
3352
3353 if (c->type == MEM_CHUNK) {
3354 xmlstr = c->mem->ptr + c->offset;
3355 weHave = buffer_string_length(c->mem) - c->offset;
3356 }
3357 else if (c->type == FILE_CHUNK) {
3358 xmlstr = webdav_mmap_file_chunk(c);
3359 /*xmlstr = c->file.mmap.start + c->offset;*/
3360 if (NULL != xmlstr) {
3361 weHave = c->file.length - c->offset;
3362 }
3363 else {
3364 switch (errno) {
3365 case ENOSYS: case ENODEV: case EINVAL: break;
3366 default:
3367 log_perror(con->errh, __FILE__, __LINE__,
3368 "open() or mmap() '%*.s'",
3369 BUFFER_INTLEN_PTR(c->mem));
3370 }
3371 if (webdav_open_chunk_file_rd(c) < 0) {
3372 log_perror(con->errh, __FILE__, __LINE__,
3373 "open() '%*.s'",
3374 BUFFER_INTLEN_PTR(c->mem));
3375 err = XML_IO_UNKNOWN;
3376 break;
3377 }
3378 ssize_t rd = -1;
3379 do {
3380 if (-1 ==lseek(c->file.fd,c->file.start+c->offset,SEEK_SET))
3381 break;
3382 off_t len = c->file.length - c->offset;
3383 if (len > (off_t)sizeof(buf)) len = (off_t)sizeof(buf);
3384 rd = read(c->file.fd, buf, (size_t)len);
3385 } while (-1 == rd && errno == EINTR);
3386 if (rd >= 0) {
3387 xmlstr = buf;
3388 weHave = (size_t)rd;
3389 }
3390 else {
3391 log_perror(con->errh, __FILE__, __LINE__,
3392 "read() '%*.s'",
3393 BUFFER_INTLEN_PTR(c->mem));
3394 err = XML_IO_UNKNOWN;
3395 break;
3396 }
3397 }
3398 }
3399 else {
3400 log_error(con->errh, __FILE__, __LINE__,
3401 "unrecognized chunk type: %d", c->type);
3402 err = XML_IO_UNKNOWN;
3403 break;
3404 }
3405
3406 if (weHave > weWant) weHave = weWant;
3407
3408 if (pconf->log_xml)
3409 log_error(con->errh, __FILE__, __LINE__,
3410 "XML-request-body: %.*s", (int)weHave, xmlstr);
3411
3412 if (XML_ERR_OK != (err = xmlParseChunk(ctxt, xmlstr, weHave, 0))) {
3413 log_error(con->errh, __FILE__, __LINE__,
3414 "xmlParseChunk failed at: %lld %zu %d",
3415 (long long int)cq->bytes_out, weHave, err);
3416 break;
3417 }
3418
3419 weWant -= weHave;
3420 chunkqueue_mark_written(cq, weHave);
3421 chunkqueue_remove_finished_chunks(cq);
3422 }
3423
3424 if (XML_ERR_OK == err) {
3425 switch ((err = xmlParseChunk(ctxt, 0, 0, 1))) {
3426 case XML_ERR_DOCUMENT_END:
3427 case XML_ERR_OK:
3428 if (ctxt->wellFormed) {
3429 xmlDoc * const xml = ctxt->myDoc;
3430 xmlFreeParserCtxt(ctxt);
3431 return xml;
3432 }
3433 break;
3434 default:
3435 log_error(con->errh, __FILE__, __LINE__,
3436 "xmlParseChunk failed at final packet: %d", err);
3437 break;
3438 }
3439 }
3440
3441 xmlFreeDoc(ctxt->myDoc);
3442 xmlFreeParserCtxt(ctxt);
3443 return NULL;
3444 }
3445 #endif
3446
3447
3448 #ifdef USE_LOCKS
3449
3450 struct webdav_lock_token_submitted_st {
3451 buffer *tokens;
3452 int used;
3453 int size;
3454 const buffer *authn_user;
3455 buffer *b;
3456 int nlocks;
3457 int slocks;
3458 int smatch;
3459 };
3460
3461
3462 static void
3463 webdav_lock_token_submitted_cb (void * const vdata,
3464 const webdav_lockdata * const lockdata)
3465 {
3466 /* RFE: improve support for shared locks
3467 * (instead of treating match of any shared lock as sufficient,
3468 * even when there are different lockroots)
3469 * keep track of matched shared locks and unmatched shared locks and
3470 * ensure that each lockroot with shared locks has at least one match
3471 * (Will need to allocate strings for each URI with shared lock and keep
3472 * track whether or not a shared lock has been matched for that URI.
3473 * After walking all locks, must walk looking for unmatched URIs,
3474 * and must free these strings) */
3475
3476 /* [RFC4918] 6.4 Lock Creator and Privileges
3477 * When a locked resource is modified, a server MUST check that the
3478 * authenticated principal matches the lock creator (in addition to
3479 * checking for valid lock token submission).
3480 */
3481
3482 struct webdav_lock_token_submitted_st * const cbdata =
3483 (struct webdav_lock_token_submitted_st *)vdata;
3484 const buffer * const locktoken = &lockdata->locktoken;
3485 const int shared = (lockdata->lockscope->used != sizeof("exclusive"));
3486
3487 ++cbdata->nlocks;
3488 if (shared) ++cbdata->slocks;
3489
3490 for (int i = 0; i < cbdata->used; ++i) {
3491 const buffer * const token = &cbdata->tokens[i];
3492 /* locktoken match (locktoken not '\0' terminated) */
3493 if (buffer_is_equal_string(token, CONST_BUF_LEN(locktoken))) {
3494 /*(0 length owner if no auth required to lock; not recommended)*/
3495 if (buffer_string_is_empty(lockdata->owner)/*no lock owner;match*/
3496 || buffer_is_equal_string(cbdata->authn_user,
3497 CONST_BUF_LEN(lockdata->owner))) {
3498 if (shared) ++cbdata->smatch;
3499 return; /* authenticated lock owner match */
3500 }
3501 }
3502 }
3503
3504 /* no match with lock tokens in request */
3505 if (!shared)
3506 webdav_xml_href(cbdata->b, &lockdata->lockroot);
3507 }
3508
3509
3510 /**
3511 * check if request provides necessary locks to access the resource
3512 */
3513 static int
3514 webdav_has_lock (connection * const con,
3515 const plugin_config * const pconf,
3516 const buffer * const uri)
3517 {
3518 /* Note with regard to exclusive locks on collections: client should not be
3519 * able to obtain an exclusive lock on a collection if there are existing
3520 * locks on resource members inside the collection. Therefore, there is no
3521 * need to check here for locks on resource members inside collections.
3522 * (This ignores the possibility that an admin or some other privileged
3523 * or out-of-band process has added locks in spite of lock on collection.)
3524 * Revisit to properly support shared locks. */
3525
3526 struct webdav_lock_token_submitted_st cbdata;
3527 cbdata.b = buffer_init();
3528 cbdata.tokens = NULL;
3529 cbdata.used = 0;
3530 cbdata.size = 0;
3531 cbdata.nlocks = 0;
3532 cbdata.slocks = 0;
3533 cbdata.smatch = 0;
3534
3535 /* XXX: maybe add config switch to require that authentication occurred? */
3536 buffer owner = { NULL, 0, 0 };/*owner (not authenticated)(auth_user unset)*/
3537 data_string * const authn_user = (data_string *)
3538 array_get_element_klen(con->environment,
3539 CONST_STR_LEN("REMOTE_USER"));
3540 cbdata.authn_user = authn_user ? authn_user->value : &owner;
3541
3542 const buffer * const h =
3543 http_header_request_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("If"));
3544
3545 if (!buffer_is_empty(h)) {
3546 /* parse "If" request header for submitted lock tokens
3547 * While the below not a pedantic, validating parse, if the header
3548 * is non-conformant or contains unencoded characters, the result
3549 * will be misidentified or ignored lock tokens, which will result
3550 * in fail closed -- secure default behavior -- if those lock
3551 * tokens are required. It is highly unlikely that misparsing the "If"
3552 * request header will result in a valid lock token since lock tokens
3553 * should be unique, and opaquelocktoken should be globally unique */
3554 char *p = h->ptr;
3555 do {
3556 #if 0
3557 while (*p == ' ' || *p == '\t') ++p;
3558 if (*p == '<') { /* Resource-Tag */
3559 do { ++p; } while (*p != '>' && *p != '\0');
3560 if (*p == '\0') break;
3561 do { ++p; } while (*p == ' ' || *p == '\t');
3562 }
3563 #endif
3564
3565 while (*p != '(' && *p != '\0') ++p;
3566
3567 /* begin List in No-tag-list or Tagged-list
3568 * List = "(" 1*Condition ")"
3569 * Condition = ["Not"] (State-token | "[" entity-tag "]")
3570 */
3571 int notflag = 0;
3572 while (*p != '\0' && *++p != ')') {
3573 while (*p == ' ' || *p == '\t') ++p;
3574 if ( (p[0] & 0xdf) == 'N'
3575 && (p[1] & 0xdf) == 'O'
3576 && (p[2] & 0xdf) == 'T') {
3577 notflag = 1;
3578 p += 3;
3579 while (*p == ' ' || *p == '\t') ++p;
3580 }
3581 if (*p != '<') { /* '<' begins State-token (Coded-URL) */
3582 if (*p != '[') break; /* invalid syntax */
3583 /* '[' and ']' wrap entity-tag */
3584 char *etag = p+1;
3585 do { ++p; } while (*p != ']' && *p != '\0');
3586 if (*p != ']') break; /* invalid syntax */
3587 if (p == etag) continue; /* ignore entity-tag if empty */
3588 if (notflag) continue;/* ignore entity-tag in NOT context */
3589 if (0 == con->etag_flags) continue; /* ignore entity-tag */
3590 struct stat st;
3591 if (0 != lstat(con->physical.path->ptr, &st)) {
3592 http_status_set_error(con,412);/* Precondition Failed */
3593 return 0;
3594 }
3595 if (S_ISDIR(st.st_mode)) continue;/*we ignore etag if dir*/
3596 buffer *etagb = con->physical.etag;
3597 etag_create(etagb, &st, con->etag_flags);
3598 etag_mutate(etagb, etagb);
3599 *p = '\0';
3600 int ematch = etag_is_equal(etagb, etag, 0);
3601 *p = ']';
3602 if (!ematch) {
3603 http_status_set_error(con,412);/* Precondition Failed */
3604 return 0;
3605 }
3606 continue;
3607 }
3608
3609 if (p[1] == 'D'
3610 && 0 == strncmp(p, "<DAV:no-lock>",
3611 sizeof("<DAV:no-lock>")-1)) {
3612 if (0 == notflag) {
3613 http_status_set_error(con,412);/* Precondition Failed */
3614 return 0;
3615 }
3616 p += sizeof("<DAV:no-lock>")-2; /* point p to '>' */
3617 continue;
3618 }
3619
3620 /* State-token (Coded-URL)
3621 * Coded-URL = "<" absolute-URI ">"
3622 * ; No linear whitespace (LWS) allowed in Coded-URL
3623 * ; absolute-URI defined in RFC 3986, Section 4.3
3624 */
3625 if (cbdata.size == cbdata.used) {
3626 if (cbdata.size == 16) { /* arbitrary limit */
3627 http_status_set_error(con, 400); /* Bad Request */
3628 return 0;
3629 }
3630 cbdata.tokens =
3631 realloc(cbdata.tokens, sizeof(*(cbdata.tokens)) * 16);
3632 force_assert(cbdata.tokens); /*(see above limit)*/
3633 }
3634 cbdata.tokens[cbdata.used].ptr = p+1;
3635
3636 do { ++p; } while (*p != '>' && *p != '\0');
3637 if (*p == '\0') break; /* (*p != '>') */
3638
3639 cbdata.tokens[cbdata.used].used =
3640 (uint32_t)(p - cbdata.tokens[cbdata.used].ptr + 1);
3641 ++cbdata.used;
3642 }
3643 } while (*p++ == ')'); /* end of List in No-tag-list or Tagged-list */
3644 }
3645
3646 webdav_lock_activelocks(pconf, uri, 1,
3647 webdav_lock_token_submitted_cb, &cbdata);
3648
3649 if (NULL != cbdata.tokens)
3650 free(cbdata.tokens);
3651
3652 int has_lock = 1;
3653
3654 if (0 != cbdata.b->used)
3655 has_lock = 0;
3656 else if (0 == cbdata.nlocks) { /* resource is not locked at all */
3657 /* error if lock provided on source and no locks present on source;
3658 * not error if no locks on Destination, but "If" provided for source */
3659 if (cbdata.used && uri == con->physical.rel_path) {
3660 has_lock = -1;
3661 http_status_set_error(con, 412); /* Precondition Failed */
3662 }
3663 #if 0 /*(treat no locks as if caller is holding an appropriate lock)*/
3664 else {
3665 has_lock = 0;
3666 webdav_xml_href(cbdata.b, uri);
3667 }
3668 #endif
3669 }
3670
3671 /*(XXX: overly simplistic shared lock matching allows any match of shared
3672 * locks even when there are shared locks on multiple different lockroots.
3673 * Failure is misreported since unmatched shared locks are not added to
3674 * cbdata.b) */
3675 if (cbdata.slocks && !cbdata.smatch)
3676 has_lock = 0;
3677
3678 if (!has_lock)
3679 webdav_xml_doc_error_lock_token_submitted(con, cbdata.b);
3680
3681 buffer_free(cbdata.b);
3682
3683 return (has_lock > 0);
3684 }
3685
3686 #else /* ! defined(USE_LOCKS) */
3687
3688 #define webdav_has_lock(con, pconf, uri) 1
3689
3690 #endif /* ! defined(USE_LOCKS) */
3691
3692
3693 static handler_t
3694 mod_webdav_propfind (connection * const con, const plugin_config * const pconf)
3695 {
3696 if (con->request.content_length) {
3697 #ifdef USE_PROPPATCH
3698 if (con->state == CON_STATE_READ_POST) {
3699 handler_t rc = connection_handle_read_post_state(pconf->srv, con);
3700 if (rc != HANDLER_GO_ON) return rc;
3701 }
3702 #else
3703 /* PROPFIND is idempotent and safe, so even if parsing XML input is not
3704 * supported, live properties can still be produced, so treat as allprop
3705 * request. NOTE: this behavior is NOT RFC CONFORMANT (and, well, if
3706 * compiled without XML support, this WebDAV implementation is already
3707 * non-compliant since it is missing support for XML request body).
3708 * RFC-compliant behavior would reject an ignored request body with
3709 * 415 Unsupported Media Type */
3710 #if 0
3711 http_status_set_error(con, 415); /* Unsupported Media Type */
3712 return HANDLER_FINISHED;
3713 #endif
3714 #endif
3715 }
3716
3717 webdav_propfind_bufs pb;
3718
3719 /* [RFC4918] 9.1 PROPFIND Method
3720 * Servers MUST support "0" and "1" depth requests on WebDAV-compliant
3721 * resources and SHOULD support "infinity" requests. In practice, support
3722 * for infinite-depth requests MAY be disabled, due to the performance and
3723 * security concerns associated with this behavior. Servers SHOULD treat
3724 * a request without a Depth header as if a "Depth: infinity" header was
3725 * included.
3726 */
3727 pb.allprop = 0;
3728 pb.propname = 0;
3729 pb.lockdiscovery= 0;
3730 pb.depth = webdav_parse_Depth(con);
3731
3732 /* future: might add config option to enable Depth: infinity
3733 * (Depth: infinity is supported if this rejection is removed) */
3734 if (-1 == pb.depth) {
3735 webdav_xml_doc_error_propfind_finite_depth(con);
3736 return HANDLER_FINISHED;
3737 }
3738
3739 if (0 != lstat(con->physical.path->ptr, &pb.st)) {
3740 http_status_set_error(con, (errno == ENOENT) ? 404 : 403);
3741 return HANDLER_FINISHED;
3742 }
3743 else if (S_ISDIR(pb.st.st_mode)) {
3744 if (con->physical.path->ptr[con->physical.path->used - 2] != '/') {
3745 buffer *vb = http_header_request_get(con, HTTP_HEADER_OTHER,
3746 CONST_STR_LEN("User-Agent"));
3747 if (vb && 0 == strncmp(vb->ptr, "Microsoft-WebDAV-MiniRedir/",
3748 sizeof("Microsoft-WebDAV-MiniRedir/")-1)) {
3749 /* workaround Microsoft-WebDAV-MiniRedir bug */
3750 http_response_redirect_to_directory(pconf->srv, con, 308);
3751 return HANDLER_FINISHED;
3752 }
3753 /* set "Content-Location" instead of sending 308 redirect to dir */
3754 if (!http_response_redirect_to_directory(pconf->srv, con, 0))
3755 return HANDLER_FINISHED;
3756 buffer_append_string_len(con->physical.path, CONST_STR_LEN("/"));
3757 buffer_append_string_len(con->physical.rel_path,CONST_STR_LEN("/"));
3758 }
3759 }
3760 else if (con->physical.path->ptr[con->physical.path->used - 2] == '/') {
3761 http_status_set_error(con, 403);
3762 return HANDLER_FINISHED;
3763 }
3764 else if (0 != pb.depth) {
3765 http_status_set_error(con, 403);
3766 return HANDLER_FINISHED;
3767 }
3768
3769 pb.proplist.ptr = NULL;
3770 pb.proplist.used = 0;
3771 pb.proplist.size = 0;
3772
3773 #ifdef USE_PROPPATCH
3774 xmlDocPtr xml = NULL;
3775 const xmlNode *rootnode = NULL;
3776 if (con->request.content_length) {
3777 if (NULL == (xml = webdav_parse_chunkqueue(con, pconf))) {
3778 http_status_set_error(con, 400); /* Bad Request */
3779 return HANDLER_FINISHED;
3780 }
3781 rootnode = xmlDocGetRootElement(xml);
3782 }
3783
3784 if (NULL != rootnode
3785 && 0 == webdav_xmlstrcmp_fixed(rootnode->name, "propfind")) {
3786 for (const xmlNode *cmd = rootnode->children; cmd; cmd = cmd->next) {
3787 if (0 == webdav_xmlstrcmp_fixed(cmd->name, "allprop"))
3788 pb.allprop = pb.lockdiscovery = 1;
3789 else if (0 == webdav_xmlstrcmp_fixed(cmd->name, "propname"))
3790 pb.propname = 1;
3791 else if (0 != webdav_xmlstrcmp_fixed(cmd->name, "prop")
3792 && 0 != webdav_xmlstrcmp_fixed(cmd->name, "include"))
3793 continue;
3794
3795 /* "prop" or "include": get prop by name */
3796 for (const xmlNode *prop = cmd->children; prop; prop = prop->next) {
3797 if (prop->type == XML_TEXT_NODE)
3798 continue; /* ignore WS */
3799
3800 if (prop->ns && '\0' == *(char *)prop->ns->href
3801 && '\0' != *(char *)prop->ns->prefix) {
3802 log_error(con->errh, __FILE__, __LINE__,
3803 "no name space for: %s", prop->name);
3804 /* 422 Unprocessable Entity */
3805 http_status_set_error(con, 422);
3806 free(pb.proplist.ptr);
3807 xmlFreeDoc(xml);
3808 return HANDLER_FINISHED;
3809 }
3810
3811 /* add property to requested list */
3812 if (pb.proplist.size == pb.proplist.used) {
3813 if (pb.proplist.size == 32) {
3814 /* arbitrarily chosen limit of 32 */
3815 log_error(con->errh, __FILE__, __LINE__,
3816 "too many properties in request (> 32)");
3817 http_status_set_error(con, 400); /* Bad Request */
3818 free(pb.proplist.ptr);
3819 xmlFreeDoc(xml);
3820 return HANDLER_FINISHED;
3821 }
3822 pb.proplist.ptr =
3823 realloc(pb.proplist.ptr, sizeof(*(pb.proplist.ptr)) * 32);
3824 force_assert(pb.proplist.ptr); /*(see above limit)*/
3825 }
3826
3827 const size_t namelen = strlen((char *)prop->name);
3828 if (prop->ns && 0 == strcmp((char *)prop->ns->href, "DAV:")) {
3829 if (namelen == sizeof("lockdiscovery")-1
3830 && 0 == memcmp(prop->name,
3831 CONST_STR_LEN("lockdiscovery"))) {
3832 pb.lockdiscovery = 1;
3833 continue;
3834 }
3835 const struct live_prop_list *list = live_properties;
3836 while (0 != list->len
3837 && (list->len != namelen
3838 || 0 != memcmp(prop->name,list->prop,list->len)))
3839 ++list;
3840 if (NULL != list->prop) {
3841 if (cmd->name[0] == 'p') { /* "prop", not "include" */
3842 pb.proplist.ptr[pb.proplist.used].name = NULL;
3843 pb.proplist.ptr[pb.proplist.used].namelen =
3844 list->pnum;
3845 pb.proplist.used++;
3846 } /* (else skip; will already be part of allprop) */
3847 continue;
3848 }
3849 if (cmd->name[0] == 'i') /* allprop "include", not "prop" */
3850 continue; /*(all props in db returned with allprop)*/
3851 /* dead props or props in "DAV:" ns not handed above */
3852 }
3853
3854 /* save pointers directly into parsed xmlDoc
3855 * Therefore, MUST NOT call xmlFreeDoc(xml)
3856 * until also done with pb.proplist */
3857 webdav_property_name * const propname =
3858 pb.proplist.ptr + pb.proplist.used++;
3859 if (prop->ns) {
3860 propname->ns = (char *)prop->ns->href;
3861 propname->nslen = strlen(propname->ns);
3862 }
3863 else {
3864 propname->ns = "";
3865 propname->nslen = 0;
3866 }
3867 propname->name = (char *)prop->name;
3868 propname->namelen = namelen;
3869 }
3870 }
3871 }
3872 #endif
3873
3874 if (NULL == pb.proplist.ptr && !pb.propname)
3875 pb.allprop = pb.lockdiscovery = 1;
3876
3877 pb.con = con;
3878 pb.pconf = pconf;
3879 pb.dst = &con->physical;
3880 pb.b = /*(optimization; buf extended as needed)*/
3881 chunkqueue_append_buffer_open_sz(con->write_queue, BUFFER_MAX_REUSE_SIZE);
3882 pb.b_200 = buffer_init();
3883 pb.b_404 = buffer_init();
3884
3885 buffer_string_prepare_copy(pb.b_200, BUFFER_MAX_REUSE_SIZE-1);
3886 buffer_string_prepare_copy(pb.b_404, BUFFER_MAX_REUSE_SIZE-1);
3887
3888 webdav_xml_doctype(pb.b, con);
3889 buffer_append_string_len(pb.b, CONST_STR_LEN(
3890 "<D:multistatus xmlns:D=\"DAV:\" " MOD_WEBDAV_XMLNS_NS0 ">\n"));
3891
3892 if (0 != pb.depth) /*(must be collection or else error returned above)*/
3893 webdav_propfind_dir(&pb);
3894 else
3895 webdav_propfind_resource(&pb);
3896
3897 buffer_append_string_len(pb.b, CONST_STR_LEN(
3898 "</D:multistatus>\n"));
3899
3900 if (pconf->log_xml)
3901 log_error(con->errh, __FILE__, __LINE__, "XML-response-body: %.*s",
3902 BUFFER_INTLEN_PTR(pb.b));
3903
3904 http_status_set_fin(con, 207); /* Multi-status */
3905
3906 buffer_free(pb.b_404);
3907 buffer_free(pb.b_200);
3908 #ifdef USE_PROPPATCH
3909 if (pb.proplist.ptr)
3910 free(pb.proplist.ptr);
3911 if (NULL != xml)
3912 xmlFreeDoc(xml);
3913 #endif
3914
3915 return HANDLER_FINISHED;
3916 }
3917
3918
3919 static handler_t
3920 mod_webdav_mkcol (connection * const con, const plugin_config * const pconf)
3921 {
3922 const int status = webdav_mkdir(pconf, &con->physical, -1);
3923 if (0 == status)
3924 http_status_set_fin(con, 201); /* Created */
3925 else
3926 http_status_set_error(con, status);
3927
3928 return HANDLER_FINISHED;
3929 }
3930
3931
3932 static handler_t
3933 mod_webdav_delete (connection * const con, const plugin_config * const pconf)
3934 {
3935 /* reject DELETE if original URI sent with fragment ('litmus' warning) */
3936 if (NULL != strchr(con->request.orig_uri->ptr, '#')) {
3937 http_status_set_error(con, 403);
3938 return HANDLER_FINISHED;
3939 }
3940
3941 struct stat st;
3942 if (-1 == lstat(con->physical.path->ptr, &st)) {
3943 http_status_set_error(con, (errno == ENOENT) ? 404 : 403);
3944 return HANDLER_FINISHED;
3945 }
3946
3947 if (0 != webdav_if_match_or_unmodified_since(con, &st)) {
3948 http_status_set_error(con, 412); /* Precondition Failed */
3949 return HANDLER_FINISHED;
3950 }
3951
3952 if (S_ISDIR(st.st_mode)) {
3953 if (con->physical.path->ptr[con->physical.path->used - 2] != '/') {
3954 #if 0 /*(issues warning for /usr/bin/litmus copymove test)*/
3955 http_response_redirect_to_directory(pconf->srv, con, 308);
3956 return HANDLER_FINISHED; /* 308 Permanent Redirect */
3957 /* Alternatively, could append '/' to con->physical.path
3958 * and con->physical.rel_path, set Content-Location in
3959 * response headers, and continue to serve the request */
3960 #else
3961 buffer_append_string_len(con->physical.path, CONST_STR_LEN("/"));
3962 buffer_append_string_len(con->physical.rel_path,CONST_STR_LEN("/"));
3963 #if 0 /*(Content-Location not very useful to client after DELETE)*/
3964 /*(? should it be request.uri or orig_uri ?)*/
3965 /*(should be url-encoded path)*/
3966 buffer_append_string_len(con->request.uri, CONST_STR_LEN("/"));
3967 http_header_response_set(con, HTTP_HEADER_CONTENT_LOCATION,
3968 CONST_STR_LEN("Content-Location"),
3969 CONST_BUF_LEN(con->request.uri));
3970 #endif
3971 #endif
3972 }
3973 /* require "infinity" if Depth request header provided */
3974 if (-1 != webdav_parse_Depth(con)) {
3975 /* [RFC4918] 9.6.1 DELETE for Collections
3976 * The DELETE method on a collection MUST act as if a
3977 * "Depth: infinity" header was used on it. A client MUST NOT
3978 * submit a Depth header with a DELETE on a collection with any
3979 * value but infinity.
3980 */
3981 http_status_set_error(con, 400); /* Bad Request */
3982 return HANDLER_FINISHED;
3983 }
3984
3985 buffer * const ms = buffer_init(); /* multi-status */
3986
3987 const int flags = (con->conf.force_lowercase_filenames)
3988 ? WEBDAV_FLAG_LC_NAMES
3989 : 0;
3990 if (0 == webdav_delete_dir(pconf, &con->physical, ms, flags)) {
3991 /* Note: this does not destroy locks if an error occurs,
3992 * which is not a problem if lock is only on the collection
3993 * being moved, but might need finer updates if there are
3994 * locks on internal elements that are successfully deleted */
3995 webdav_lock_delete_uri_col(pconf, con->physical.rel_path);
3996 http_status_set_fin(con, 204); /* No Content */
3997 }
3998 else {
3999 webdav_xml_doc_multistatus(con, pconf, ms); /* 207 Multi-status */
4000 }
4001
4002 buffer_free(ms);
4003 /* invalidate stat cache of src if DELETE, whether or not successful */
4004 stat_cache_delete_dir(pconf->srv, CONST_BUF_LEN(con->physical.path));
4005 }
4006 else if (con->physical.path->ptr[con->physical.path->used - 2] == '/')
4007 http_status_set_error(con, 403);
4008 else {
4009 const int status = webdav_delete_file(pconf, &con->physical);
4010 if (0 == status) {
4011 webdav_lock_delete_uri(pconf, con->physical.rel_path);
4012 http_status_set_fin(con, 204); /* No Content */
4013 }
4014 else
4015 http_status_set_error(con, status);
4016 }
4017
4018 return HANDLER_FINISHED;
4019 }
4020
4021
4022 static ssize_t
4023 mod_webdav_write_cq_first_chunk (connection * const con, chunkqueue * const cq,
4024 const int fd)
4025 {
4026 /* (Note: copying might take some time, temporarily pausing server) */
4027 chunk *c = cq->first;
4028 ssize_t wr = 0;
4029
4030 switch(c->type) {
4031 case FILE_CHUNK:
4032 if (NULL != webdav_mmap_file_chunk(c)) {
4033 do {
4034 wr = write(fd, c->file.mmap.start+c->offset,
4035 c->file.length - c->offset);
4036 } while (-1 == wr && errno == EINTR);
4037 break;
4038 }
4039 else {
4040 switch (errno) {
4041 case ENOSYS: case ENODEV: case EINVAL: break;
4042 default:
4043 log_perror(con->errh, __FILE__, __LINE__,
4044 "open() or mmap() '%*.s'",
4045 BUFFER_INTLEN_PTR(c->mem));
4046 }
4047
4048 if (webdav_open_chunk_file_rd(c) < 0) {
4049 http_status_set_error(con, 500); /* Internal Server Error */
4050 return -1;
4051 }
4052 ssize_t rd = -1;
4053 char buf[16384];
4054 do {
4055 if (-1 == lseek(c->file.fd, c->file.start+c->offset, SEEK_SET))
4056 break;
4057 off_t len = c->file.length - c->offset;
4058 if (len > (off_t)sizeof(buf)) len = (off_t)sizeof(buf);
4059 rd = read(c->file.fd, buf, (size_t)len);
4060 } while (-1 == rd && errno == EINTR);
4061 if (rd >= 0) {
4062 do {
4063 wr = write(fd, buf, (size_t)rd);
4064 } while (-1 == wr && errno == EINTR);
4065 break;
4066 }
4067 else {
4068 log_perror(con->errh, __FILE__, __LINE__,
4069 "read() '%*.s'",
4070 BUFFER_INTLEN_PTR(c->mem));
4071 http_status_set_error(con, 500); /* Internal Server Error */
4072 return -1;
4073 }
4074 }
4075 case MEM_CHUNK:
4076 do {
4077 wr = write(fd, c->mem->ptr + c->offset,
4078 buffer_string_length(c->mem) - c->offset);
4079 } while (-1 == wr && errno == EINTR);
4080 break;
4081 }
4082
4083 if (wr > 0) {
4084 chunkqueue_mark_written(cq, wr);
4085 chunkqueue_remove_finished_chunks(cq);
4086 }
4087 else if (wr < 0)
4088 http_status_set_error(con, (errno == ENOSPC) ? 507 : 403);
4089
4090 return wr;
4091 }
4092
4093
4094 __attribute_noinline__
4095 static int
4096 mod_webdav_write_cq (connection* const con, chunkqueue* const cq, const int fd)
4097 {
4098 chunkqueue_remove_finished_chunks(cq);
4099 while (!chunkqueue_is_empty(cq)) {
4100 if (mod_webdav_write_cq_first_chunk(con, cq, fd) < 0) return 0;
4101 }
4102 return 1;
4103 }
4104
4105
4106 #if (defined(__linux__) || defined(__CYGWIN__)) && defined(O_TMPFILE)
4107 static int
4108 mod_webdav_write_single_file_chunk (connection* const con, chunkqueue* const cq)
4109 {
4110 /* cq might have mem chunks after initial tempfile chunk
4111 * due to chunkqueue_steal() if request body is small */
4112 /*assert(cq->first->type == FILE_CHUNK);*/
4113 /*assert(cq->first->next != NULL);*/
4114 chunk * const c = cq->first;
4115 cq->first = c->next;
4116 if (mod_webdav_write_cq(con, cq, c->file.fd)) {
4117 /*assert(cq->first == NULL);*/
4118 c->next = NULL;
4119 cq->first = cq->last = c;
4120 return 1;
4121 }
4122 else {
4123 /*assert(cq->first != NULL);*/
4124 c->next = cq->first;
4125 cq->first = c;
4126 return 0;
4127 }
4128 }
4129 #endif
4130
4131
4132 static handler_t
4133 mod_webdav_put_0 (connection * const con, const plugin_config * const pconf)
4134 {
4135 if (0 != webdav_if_match_or_unmodified_since(con, NULL)) {
4136 http_status_set_error(con, 412); /* Precondition Failed */
4137 return HANDLER_FINISHED;
4138 }
4139
4140 /* special-case PUT 0-length file */
4141 int fd;
4142 fd = fdevent_open_cloexec(con->physical.path->ptr, 0,
4143 O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
4144 WEBDAV_FILE_MODE);
4145 if (fd >= 0) {
4146 if (0 != con->etag_flags) {
4147 /*(skip sending etag if fstat() error; not expected)*/
4148 struct stat st;
4149 if (0 == fstat(fd, &st)) webdav_response_etag(pconf->srv, con, &st);
4150 }
4151 close(fd);
4152 http_status_set_fin(con, 201); /* Created */
4153 return HANDLER_FINISHED;
4154 }
4155 else if (errno == EISDIR) {
4156 http_status_set_error(con, 405); /* Method Not Allowed */
4157 return HANDLER_FINISHED;
4158 }
4159
4160 if (errno == ELOOP)
4161 webdav_delete_file(pconf, &con->physical); /*(ignore result)*/
4162 /*(attempt unlink(); target might be symlink
4163 * and above O_NOFOLLOW resulted in ELOOP)*/
4164
4165 fd = fdevent_open_cloexec(con->physical.path->ptr, 0,
4166 O_WRONLY | O_CREAT | O_TRUNC,
4167 WEBDAV_FILE_MODE);
4168 if (fd >= 0) {
4169 close(fd);
4170 http_status_set_fin(con, 204); /* No Content */
4171 return HANDLER_FINISHED;
4172 }
4173
4174 http_status_set_error(con, 500); /* Internal Server Error */
4175 return HANDLER_FINISHED;
4176 }
4177
4178
4179 static handler_t
4180 mod_webdav_put_prep (connection * const con, const plugin_config * const pconf)
4181 {
4182 if (NULL != http_header_request_get(con, HTTP_HEADER_OTHER,
4183 CONST_STR_LEN("Content-Range"))) {
4184 if (pconf->deprecated_unsafe_partial_put_compat) return HANDLER_GO_ON;
4185 /* [RFC7231] 4.3.4 PUT
4186 * An origin server that allows PUT on a given target resource MUST
4187 * send a 400 (Bad Request) response to a PUT request that contains a
4188 * Content-Range header field (Section 4.2 of [RFC7233]), since the
4189 * payload is likely to be partial content that has been mistakenly
4190 * PUT as a full representation.
4191 */
4192 http_status_set_error(con, 400); /* Bad Request */
4193 return HANDLER_FINISHED;
4194 }
4195
4196 const uint32_t used = con->physical.path->used;
4197 char *slash = con->physical.path->ptr + used - 2;
4198 if (*slash == '/') { /* disallow PUT on a collection (path ends in '/') */
4199 http_status_set_error(con, 400); /* Bad Request */
4200 return HANDLER_FINISHED;
4201 }
4202
4203 /* special-case PUT 0-length file */
4204 if (0 == con->request.content_length)
4205 return mod_webdav_put_0(con, pconf);
4206
4207 /* Create temporary file in target directory (to store reqbody as received)
4208 * Temporary file is unlinked so that if receiving reqbody fails,
4209 * temp file is automatically cleaned up when fd is closed.
4210 * While being received, temporary file is not part of directory listings.
4211 * While this might result in extra copying, it is simple and robust. */
4212 int fd;
4213 size_t len = buffer_string_length(con->physical.path);
4214 #if (defined(__linux__) || defined(__CYGWIN__)) && defined(O_TMPFILE)
4215 slash = memrchr(con->physical.path->ptr, '/', len);
4216 if (slash == con->physical.path->ptr) slash = NULL;
4217 if (slash) *slash = '\0';
4218 fd = fdevent_open_cloexec(con->physical.path->ptr, 1,
4219 O_RDWR | O_TMPFILE | O_APPEND, WEBDAV_FILE_MODE);
4220 if (slash) *slash = '/';
4221 if (fd < 0)
4222 #endif
4223 {
4224 buffer_append_string_len(con->physical.path, CONST_STR_LEN("-XXXXXX"));
4225 fd = fdevent_mkstemp_append(con->physical.path->ptr);
4226 if (fd >= 0) unlink(con->physical.path->ptr);
4227 buffer_string_set_length(con->physical.path, len);
4228 }
4229 if (fd < 0) {
4230 http_status_set_error(con, 500); /* Internal Server Error */
4231 return HANDLER_FINISHED;
4232 }
4233
4234 /* copy all chunks even though expecting (at most) single MEM_CHUNK chunk
4235 * (still, loop on partial writes)
4236 * (Note: copying might take some time, temporarily pausing server)
4237 * (error status is set if error occurs) */
4238 chunkqueue * const cq = con->request_content_queue;
4239 off_t cqlen = chunkqueue_length(cq);
4240 if (!mod_webdav_write_cq(con, cq, fd)) {
4241 close(fd);
4242 return HANDLER_FINISHED;
4243 }
4244
4245 chunkqueue_reset(cq);
4246 if (0 != cqlen) /*(con->physical.path copied, then c->mem cleared below)*/
4247 chunkqueue_append_file_fd(cq, con->physical.path, fd, 0, cqlen);
4248 else {
4249 /*(must be non-zero for fd to be appended, then reset to 0-length)*/
4250 chunkqueue_append_file_fd(cq, con->physical.path, fd, 0, 1);
4251 cq->last->file.length = 0;
4252 cq->bytes_in = 0;
4253 }
4254 buffer_clear(cq->last->mem); /* file already unlink()ed */
4255 chunkqueue_set_tempdirs(cq, cq->tempdirs, INTMAX_MAX);
4256 cq->last->file.is_temp = 1;
4257
4258 return HANDLER_GO_ON;
4259 }
4260
4261
4262 #if (defined(__linux__) || defined(__CYGWIN__)) && defined(O_TMPFILE)
4263 static int
4264 mod_webdav_put_linkat_rename (connection * const con,
4265 const plugin_config * const pconf,
4266 const char * const pathtemp)
4267 {
4268 chunkqueue * const cq = con->request_content_queue;
4269 chunk *c = cq->first;
4270
4271 char pathproc[32] = "/proc/self/fd/";
4272 li_itostrn(pathproc+sizeof("/proc/self/fd/")-1,
4273 sizeof(pathproc)-(sizeof("/proc/self/fd/")-1), (long)c->file.fd);
4274 if (0 == linkat(AT_FDCWD, pathproc, AT_FDCWD, pathtemp, AT_SYMLINK_FOLLOW)){
4275 struct stat st;
4276 #ifdef RENAME_NOREPLACE /*(renameat2() not well-supported yet)*/
4277 if (0 == renameat2(AT_FDCWD, pathtemp,
4278 AT_FDCWD, con->physical.path->ptr, RENAME_NOREPLACE))
4279 http_status_set_fin(con, 201); /* Created */
4280 else if (0 == rename(pathtemp, con->physical.path->ptr))
4281 http_status_set_fin(con, 204); /* No Content */ /*(replaced)*/
4282 else
4283 #else
4284 http_status_set_fin(con, 0 == lstat(con->physical.path->ptr, &st)
4285 ? 204 /* No Content */
4286 : 201); /* Created */
4287 if (0 != rename(pathtemp, con->physical.path->ptr))
4288 #endif
4289 {
4290 if (errno == EISDIR)
4291 http_status_set_error(con, 405); /* Method Not Allowed */
4292 else
4293 http_status_set_error(con, 403); /* Forbidden */
4294 unlink(pathtemp);
4295 }
4296
4297 if (0 != con->etag_flags && http_status_get(con) < 300) { /*(201, 204)*/
4298 /*(skip sending etag if fstat() error; not expected)*/
4299 if (0 == fstat(c->file.fd, &st))
4300 webdav_response_etag(pconf->srv, con, &st);
4301 }
4302
4303 chunkqueue_mark_written(cq, c->file.length);
4304 chunkqueue_remove_finished_chunks(cq);
4305 return 1;
4306 }
4307
4308 return 0;
4309 }
4310 #endif
4311
4312
4313 __attribute_cold__
4314 static handler_t
4315 mod_webdav_put_deprecated_unsafe_partial_put_compat (connection * const con,
4316 const plugin_config *pconf,
4317 const buffer * const h)
4318 {
4319 /* historical code performed very limited range parse (repeated here) */
4320 /* we only support <num>- ... */
4321 const char *num = h->ptr;
4322 off_t offset;
4323 char *err;
4324 if (0 != strncmp(num, "bytes", sizeof("bytes")-1)) {
4325 http_status_set_error(con, 501); /* Not Implemented */
4326 return HANDLER_FINISHED;
4327 }
4328 num += 5; /* +5 for "bytes" */
4329 offset = strtoll(num, &err, 10); /*(strtoll() ignores leading whitespace)*/
4330 if (num == err || *err != '-' || offset < 0) {
4331 http_status_set_error(con, 501); /* Not Implemented */
4332 return HANDLER_FINISHED;
4333 }
4334
4335 const int fd = fdevent_open_cloexec(con->physical.path->ptr, 0,
4336 O_WRONLY, WEBDAV_FILE_MODE);
4337 if (fd < 0) {
4338 http_status_set_error(con, (errno == ENOENT) ? 404 : 403);
4339 return HANDLER_FINISHED;
4340 }
4341
4342 if (-1 == lseek(fd, offset, SEEK_SET)) {
4343 close(fd);
4344 http_status_set_error(con, 500); /* Internal Server Error */
4345 return HANDLER_FINISHED;
4346 }
4347
4348 /* copy all chunks even though expecting single chunk
4349 * (still, loop on partial writes)
4350 * (Note: copying might take some time, temporarily pausing server)
4351 * (error status is set if error occurs) */
4352 mod_webdav_write_cq(con, con->request_content_queue, fd);
4353
4354 struct stat st;
4355 if (0 != con->etag_flags && !http_status_is_set(con)) {
4356 /*(skip sending etag if fstat() error; not expected)*/
4357 if (0 != fstat(fd, &st)) con->etag_flags = 0;
4358 }
4359
4360 const int wc = close(fd);
4361 if (0 != wc && !http_status_is_set(con))
4362 http_status_set_error(con, (errno == ENOSPC) ? 507 : 403);
4363
4364 if (!http_status_is_set(con)) {
4365 http_status_set_fin(con, 204); /* No Content */
4366 if (0 != con->etag_flags) webdav_response_etag(pconf->srv, con, &st);
4367 }
4368
4369 return HANDLER_FINISHED;
4370 }
4371
4372
4373 static handler_t
4374 mod_webdav_put (connection * const con, const plugin_config * const pconf)
4375 {
4376 if (con->state == CON_STATE_READ_POST) {
4377 int first_read = chunkqueue_is_empty(con->request_content_queue);
4378 handler_t rc = connection_handle_read_post_state(pconf->srv, con);
4379 if (rc != HANDLER_GO_ON) {
4380 if (first_read && rc == HANDLER_WAIT_FOR_EVENT
4381 && 0 != webdav_if_match_or_unmodified_since(con, NULL)) {
4382 http_status_set_error(con, 412); /* Precondition Failed */
4383 return HANDLER_FINISHED;
4384 }
4385 return rc;
4386 }
4387 }
4388
4389 if (0 != webdav_if_match_or_unmodified_since(con, NULL)) {
4390 http_status_set_error(con, 412); /* Precondition Failed */
4391 return HANDLER_FINISHED;
4392 }
4393
4394 if (pconf->deprecated_unsafe_partial_put_compat) {
4395 const buffer * const h =
4396 http_header_request_get(con, HTTP_HEADER_OTHER,
4397 CONST_STR_LEN("Content-Range"));
4398 if (NULL != h)
4399 return
4400 mod_webdav_put_deprecated_unsafe_partial_put_compat(con,pconf,h);
4401 }
4402
4403 /* construct temporary filename in same directory as target
4404 * (expect cq contains exactly one chunk:
4405 * the temporary FILE_CHUNK created in mod_webdav_put_prep())
4406 * (do not reuse c->mem buffer; if tmpfile was unlinked, c->mem is blank)
4407 * (since temporary file was unlinked, no guarantee of unique name,
4408 * so add pid and fd to avoid conflict with an unlikely parallel
4409 * PUT request being handled by same server pid (presumably by
4410 * same client using same lock token)) */
4411 chunkqueue * const cq = con->request_content_queue;
4412 chunk *c = cq->first;
4413
4414 /* future: might support client specifying getcontenttype property
4415 * using Content-Type request header. However, [RFC4918] 9.7.1 notes:
4416 * Many servers do not allow configuring the Content-Type on a
4417 * per-resource basis in the first place. Thus, clients can't always
4418 * rely on the ability to directly influence the content type by
4419 * including a Content-Type request header
4420 */
4421
4422 /*(similar to beginning of webdav_linktmp_rename())*/
4423 buffer * const tmpb = pconf->tmpb;
4424 buffer_copy_buffer(tmpb, con->physical.path);
4425 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
4426 buffer_append_int(tmpb, (long)getpid());
4427 buffer_append_string_len(tmpb, CONST_STR_LEN("."));
4428 if (c->type == MEM_CHUNK)
4429 buffer_append_uint_hex_lc(tmpb, (uintptr_t)pconf); /*(stack/heap addr)*/
4430 else
4431 buffer_append_int(tmpb, (long)c->file.fd);
4432 buffer_append_string_len(tmpb, CONST_STR_LEN("~"));
4433
4434 if (buffer_string_length(tmpb) >= PATH_MAX) { /*(temp file path too long)*/
4435 http_status_set_error(con, 500); /* Internal Server Error */
4436 return HANDLER_FINISHED;
4437 }
4438
4439 const char *pathtemp = tmpb->ptr;
4440
4441 #if (defined(__linux__) || defined(__CYGWIN__)) && defined(O_TMPFILE)
4442 if (c->type == FILE_CHUNK) { /*(reqbody contained in single tempfile)*/
4443 if (NULL != c->next) {
4444 /* if request body <= 64k, in-memory chunks might have been
4445 * moved to cq instead of appended to first chunk FILE_CHUNK */
4446 if (!mod_webdav_write_single_file_chunk(con, cq))
4447 return HANDLER_FINISHED;
4448 }
4449 if (mod_webdav_put_linkat_rename(con, pconf, pathtemp))
4450 return HANDLER_FINISHED;
4451 /* attempt traditional copy (below) if linkat() failed for any reason */
4452 }
4453 #endif
4454
4455 const int fd = fdevent_open_cloexec(pathtemp, 0,
4456 O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
4457 WEBDAV_FILE_MODE);
4458 if (fd < 0) {
4459 http_status_set_error(con, 500); /* Internal Server Error */
4460 return HANDLER_FINISHED;
4461 }
4462
4463 /* copy all chunks even though expecting single chunk
4464 * (still, loop on partial writes)
4465 * (Note: copying might take some time, temporarily pausing server)
4466 * (error status is set if error occurs) */
4467 mod_webdav_write_cq(con, cq, fd);
4468
4469 struct stat st;
4470 if (0 != con->etag_flags && !http_status_is_set(con)) {
4471 /*(skip sending etag if fstat() error; not expected)*/
4472 if (0 != fstat(fd, &st)) con->etag_flags = 0;
4473 }
4474
4475 const int wc = close(fd);
4476 if (0 != wc && !http_status_is_set(con))
4477 http_status_set_error(con, (errno == ENOSPC) ? 507 : 403);
4478
4479 if (!http_status_is_set(con)) {
4480 struct stat ste;
4481 http_status_set_fin(con, 0 == lstat(con->physical.path->ptr, &ste)
4482 ? 204 /* No Content */
4483 : 201); /* Created */
4484 if (0 == rename(pathtemp, con->physical.path->ptr)) {
4485 if (0 != con->etag_flags) webdav_response_etag(pconf->srv,con,&st);
4486 }
4487 else {
4488 if (errno == EISDIR)
4489 http_status_set_error(con, 405); /* Method Not Allowed */
4490 else
4491 http_status_set_error(con, 500); /* Internal Server Error */
4492 unlink(pathtemp);
4493 }
4494 }
4495 else
4496 unlink(pathtemp);
4497
4498 return HANDLER_FINISHED;
4499 }
4500
4501
4502 static handler_t
4503 mod_webdav_copymove_b (connection * const con, const plugin_config * const pconf, buffer * const dst_path, buffer * const dst_rel_path)
4504 {
4505 int flags = WEBDAV_FLAG_OVERWRITE /*(default)*/
4506 | (con->conf.force_lowercase_filenames
4507 ? WEBDAV_FLAG_LC_NAMES
4508 : 0)
4509 | (con->request.http_method == HTTP_METHOD_MOVE
4510 ? WEBDAV_FLAG_MOVE_RENAME
4511 : WEBDAV_FLAG_COPY_LINK);
4512
4513 const buffer * const h =
4514 http_header_request_get(con,HTTP_HEADER_OTHER,CONST_STR_LEN("Overwrite"));
4515 if (NULL != h) {
4516 if (h->used != 2
4517 || ((h->ptr[0] & 0xdf) != 'F' && (h->ptr[0] & 0xdf) != 'T')) {
4518 http_status_set_error(con, 400); /* Bad Request */
4519 return HANDLER_FINISHED;
4520 }
4521 if ((h->ptr[0] & 0xdf) == 'F')
4522 flags &= ~WEBDAV_FLAG_OVERWRITE;
4523 }
4524
4525 /* parse Destination
4526 *
4527 * http://127.0.0.1:1025/dav/litmus/copydest
4528 *
4529 * - host has to match Host: header in request
4530 * (or else would need to check that Destination is reachable from server
4531 * and authentication credentials grant privileges on Destination)
4532 * - query string on Destination, if present, is discarded
4533 *
4534 * NOTE: Destination path is relative to document root and IS NOT re-run
4535 * through other modules on server (such as aliasing or rewrite or userdir)
4536 */
4537 const buffer * const destination =
4538 http_header_request_get(con, HTTP_HEADER_OTHER,
4539 CONST_STR_LEN("Destination"));
4540 if (NULL == destination) {
4541 http_status_set_error(con, 400); /* Bad Request */
4542 return HANDLER_FINISHED;
4543 }
4544 #ifdef __COVERITY__
4545 force_assert(2 <= destination->used);
4546 #endif
4547
4548 const char *sep = destination->ptr, *start;
4549 if (*sep != '/') { /* path-absolute or absolute-URI form */
4550 start = sep;
4551 sep = start + buffer_string_length(con->uri.scheme);
4552 if (0 != strncmp(start, con->uri.scheme->ptr, sep - start)
4553 || sep[0] != ':' || sep[1] != '/' || sep[2] != '/') {
4554 http_status_set_error(con, 400); /* Bad Request */
4555 return HANDLER_FINISHED;
4556 }
4557 start = sep + 3;
4558
4559 if (NULL == (sep = strchr(start, '/'))) {
4560 http_status_set_error(con, 400); /* Bad Request */
4561 return HANDLER_FINISHED;
4562 }
4563 if (!buffer_is_equal_string(con->uri.authority, start, sep - start)
4564 /* skip login info (even though it should not be present) */
4565 && (NULL == (start = (char *)memchr(start, '@', sep - start))
4566 || (++start, !buffer_is_equal_string(con->uri.authority,
4567 start, sep - start)))) {
4568 /* not the same host */
4569 http_status_set_error(con, 502); /* Bad Gateway */
4570 return HANDLER_FINISHED;
4571 }
4572 }
4573 start = sep; /* starts with '/' */
4574
4575 physical_st dst;
4576 dst.path = dst_path;
4577 dst.rel_path = dst_rel_path;
4578
4579 /* destination: remove query string, urldecode, path_simplify
4580 * and (maybe) lowercase for consistent destination URI path */
4581 buffer_copy_string_len(dst_rel_path, start,
4582 NULL == (sep = strchr(start, '?'))
4583 ? destination->ptr + destination->used-1 - start
4584 : sep - start);
4585 if (buffer_string_length(dst_rel_path) >= PATH_MAX) {
4586 http_status_set_error(con, 403); /* Forbidden */
4587 return HANDLER_FINISHED;
4588 }
4589 buffer_urldecode_path(dst_rel_path);
4590 if (!buffer_is_valid_UTF8(dst_rel_path)) {
4591 /* invalid UTF-8 after url-decode */
4592 http_status_set_error(con, 400);
4593 return HANDLER_FINISHED;
4594 }
4595 buffer_path_simplify(dst_rel_path, dst_rel_path);
4596 if (buffer_string_is_empty(dst_rel_path) || dst_rel_path->ptr[0] != '/') {
4597 http_status_set_error(con, 400);
4598 return HANDLER_FINISHED;
4599 }
4600
4601 if (flags & WEBDAV_FLAG_LC_NAMES)
4602 buffer_to_lower(dst_rel_path);
4603
4604 /* Destination physical path
4605 * src con->physical.path might have been remapped with mod_alias.
4606 * (but mod_alias does not modify con->physical.rel_path)
4607 * Find matching prefix to support use of mod_alias to remap webdav root.
4608 * Aliasing of paths underneath the webdav root might not work.
4609 * Likewise, mod_rewrite URL rewriting might thwart this comparison.
4610 * Use mod_redirect instead of mod_alias to remap paths *under* webdav root.
4611 * Use mod_redirect instead of mod_rewrite on *any* parts of path to webdav.
4612 * (Related, use mod_auth to protect webdav root, but avoid attempting to
4613 * use mod_auth on paths underneath webdav root, as Destination is not
4614 * validated with mod_auth)
4615 *
4616 * tl;dr: webdav paths and webdav properties are managed by mod_webdav,
4617 * so do not modify paths externally or else undefined behavior
4618 * or corruption may occur
4619 *
4620 * find matching URI prefix (lowercased if WEBDAV_FLAG_LC_NAMES)
4621 * (con->physical.rel_path and dst_rel_path will always match leading '/')
4622 * check if remaining con->physical.rel_path matches suffix of
4623 * con->physical.path so that we can use the prefix to remap
4624 * Destination physical path */
4625 #ifdef __COVERITY__
4626 force_assert(0 != con->physical.rel_path->used);
4627 #endif
4628 uint32_t i, remain;
4629 {
4630 const char * const p1 = con->physical.rel_path->ptr;
4631 const char * const p2 = dst_rel_path->ptr;
4632 for (i = 0; p1[i] && p1[i] == p2[i]; ++i) ;
4633 while (i != 0 && p1[--i] != '/') ; /* find matching directory path */
4634 }
4635 remain = con->physical.rel_path->used - 1 - i;
4636 if (con->physical.path->used - 1 <= remain) { /*(should not happen)*/
4637 http_status_set_error(con, 403); /* Forbidden */
4638 return HANDLER_FINISHED;
4639 }
4640 if (0 == memcmp(con->physical.rel_path->ptr+i, /*(suffix match)*/
4641 con->physical.path->ptr + con->physical.path->used-1-remain,
4642 remain)) { /*(suffix match)*/
4643 #ifdef __COVERITY__
4644 force_assert(2 <= dst_rel_path->used);
4645 #endif
4646 buffer_copy_string_len(dst_path, con->physical.path->ptr,
4647 con->physical.path->used - 1 - remain);
4648 buffer_append_string_len(dst_path,
4649 dst_rel_path->ptr+i,
4650 dst_rel_path->used - 1 - i);
4651 if (buffer_string_length(dst_path) >= PATH_MAX) {
4652 http_status_set_error(con, 403); /* Forbidden */
4653 return HANDLER_FINISHED;
4654 }
4655 }
4656 else { /*(not expected; some other module mucked with path or rel_path)*/
4657 /* unable to perform physical path remap here;
4658 * assume doc_root/rel_path and no remapping */
4659 #ifdef __COVERITY__
4660 force_assert(2 <= con->physical.doc_root->used);
4661 force_assert(2 <= dst_path->used);
4662 #endif
4663 buffer_copy_buffer(dst_path, con->physical.doc_root);
4664 if (dst_path->ptr[dst_path->used-2] == '/')
4665 --dst_path->used; /* since dst_rel_path begins with '/' */
4666 buffer_append_string_buffer(dst_path, dst_rel_path);
4667 if (buffer_string_length(dst_rel_path) >= PATH_MAX) {
4668 http_status_set_error(con, 403); /* Forbidden */
4669 return HANDLER_FINISHED;
4670 }
4671 }
4672
4673 if (con->physical.path->used <= dst_path->used
4674 && 0 == memcmp(con->physical.path->ptr, dst_path->ptr,
4675 con->physical.path->used-1)
4676 && (con->physical.path->ptr[con->physical.path->used-2] == '/'
4677 || dst_path->ptr[con->physical.path->used-1] == '/'
4678 || dst_path->ptr[con->physical.path->used-1] == '\0')) {
4679 /* dst must not be nested under (or same as) src */
4680 http_status_set_error(con, 403); /* Forbidden */
4681 return HANDLER_FINISHED;
4682 }
4683
4684 struct stat st;
4685 if (-1 == lstat(con->physical.path->ptr, &st)) {
4686 /* don't known about it yet, unlink will fail too */
4687 http_status_set_error(con, (errno == ENOENT) ? 404 : 403);
4688 return HANDLER_FINISHED;
4689 }
4690
4691 if (0 != webdav_if_match_or_unmodified_since(con, &st)) {
4692 http_status_set_error(con, 412); /* Precondition Failed */
4693 return HANDLER_FINISHED;
4694 }
4695
4696 if (S_ISDIR(st.st_mode)) {
4697 if (con->physical.path->ptr[con->physical.path->used - 2] != '/') {
4698 http_response_redirect_to_directory(pconf->srv, con, 308);
4699 return HANDLER_FINISHED; /* 308 Permanent Redirect */
4700 /* Alternatively, could append '/' to con->physical.path
4701 * and con->physical.rel_path, set Content-Location in
4702 * response headers, and continue to serve the request. */
4703 }
4704
4705 /* ensure Destination paths end with '/' since dst is a collection */
4706 #ifdef __COVERITY__
4707 force_assert(2 <= dst_rel_path->used);
4708 #endif
4709 if (dst_rel_path->ptr[dst_rel_path->used - 2] != '/') {
4710 buffer_append_slash(dst_rel_path);
4711 buffer_append_slash(dst_path);
4712 }
4713
4714 /* check for lock on destination (after ensuring dst ends in '/') */
4715 if (!webdav_has_lock(con, pconf, dst_rel_path))
4716 return HANDLER_FINISHED; /* 423 Locked */
4717
4718 const int depth = webdav_parse_Depth(con);
4719 if (1 == depth) {
4720 http_status_set_error(con, 400); /* Bad Request */
4721 return HANDLER_FINISHED;
4722 }
4723 if (0 == depth) {
4724 if (con->request.http_method == HTTP_METHOD_MOVE) {
4725 http_status_set_error(con, 400); /* Bad Request */
4726 return HANDLER_FINISHED;
4727 }
4728 /* optionally create collection, then copy properties */
4729 int status;
4730 if (0 == lstat(dst_path->ptr, &st)) {
4731 if (S_ISDIR(st.st_mode))
4732 status = 204; /* No Content */
4733 else if (flags & WEBDAV_FLAG_OVERWRITE) {
4734 status = webdav_mkdir(pconf, &dst, 1);
4735 if (0 == status) status = 204; /* No Content */
4736 }
4737 else
4738 status = 412; /* Precondition Failed */
4739 }
4740 else if (errno == ENOENT) {
4741 status = webdav_mkdir(pconf, &dst,
4742 !!(flags & WEBDAV_FLAG_OVERWRITE));
4743 if (0 == status) status = 201; /* Created */
4744 }
4745 else
4746 status = 403; /* Forbidden */
4747 if (status < 300) {
4748 http_status_set_fin(con, status);
4749 webdav_prop_copy_uri(pconf,con->physical.rel_path,dst.rel_path);
4750 }
4751 else
4752 http_status_set_error(con, status);
4753 return HANDLER_FINISHED;
4754 }
4755
4756 /* ensure destination is not nested in source */
4757 if (dst_rel_path->ptr[dst_rel_path->used - 2] != '/') {
4758 buffer_append_slash(dst_rel_path);
4759 buffer_append_slash(dst_path);
4760 }
4761
4762 buffer * const ms = buffer_init(); /* multi-status */
4763 if (0 == webdav_copymove_dir(pconf, &con->physical, &dst, ms, flags)) {
4764 if (con->request.http_method == HTTP_METHOD_MOVE)
4765 webdav_lock_delete_uri_col(pconf, con->physical.rel_path);
4766 /*(requiring lock on destination requires MKCOL create dst first)
4767 *(if no lock support, return 200 OK unconditionally
4768 * instead of 200 OK or 201 Created; not fully RFC-conformant)*/
4769 http_status_set_fin(con, 200); /* OK */
4770 }
4771 else {
4772 /* Note: this does not destroy any locks if any error occurs,
4773 * which is not a problem if lock is only on the collection
4774 * being moved, but might need finer updates if there are
4775 * locks on internal elements that are successfully moved */
4776 webdav_xml_doc_multistatus(con, pconf, ms); /* 207 Multi-status */
4777 }
4778 buffer_free(ms);
4779 /* invalidate stat cache of src if MOVE, whether or not successful */
4780 if (con->request.http_method == HTTP_METHOD_MOVE)
4781 stat_cache_delete_dir(pconf->srv,CONST_BUF_LEN(con->physical.path));
4782 return HANDLER_FINISHED;
4783 }
4784 else if (con->physical.path->ptr[con->physical.path->used - 2] == '/') {
4785 http_status_set_error(con, 403); /* Forbidden */
4786 return HANDLER_FINISHED;
4787 }
4788 else {
4789 /* check if client has lock for destination
4790 * Note: requiring a lock on non-collection means that destination
4791 * should always exist since the issuance of the lock creates the
4792 * resource, so client will always have to provide Overwrite: T
4793 * for direct operations on non-collections (files) */
4794 if (!webdav_has_lock(con, pconf, dst_rel_path))
4795 return HANDLER_FINISHED; /* 423 Locked */
4796
4797 /* check if destination exists
4798 * (Destination should exist since lock is required,
4799 * and obtaining a lock will create the resource) */
4800 int rc = lstat(dst_path->ptr, &st);
4801 if (0 == rc && S_ISDIR(st.st_mode)) {
4802 /* file to dir/
4803 * append basename to physical path
4804 * future: might set Content-Location if dst_path does not end '/'*/
4805 if (NULL != (sep = strrchr(con->physical.path->ptr, '/'))) {
4806 #ifdef __COVERITY__
4807 force_assert(0 != dst_path->used);
4808 #endif
4809 size_t len = con->physical.path->used - 1
4810 - (sep - con->physical.path->ptr);
4811 if (dst_path->ptr[dst_path->used-1] == '/') {
4812 ++sep; /*(avoid double-slash in path)*/
4813 --len;
4814 }
4815 buffer_append_string_len(dst_path, sep, len);
4816 buffer_append_string_len(dst_rel_path, sep, len);
4817 if (buffer_string_length(dst_path) >= PATH_MAX) {
4818 http_status_set_error(con, 403); /* Forbidden */
4819 return HANDLER_FINISHED;
4820 }
4821 rc = lstat(dst_path->ptr, &st);
4822 /* target (parent collection) already exists */
4823 http_status_set_fin(con, 204); /* No Content */
4824 }
4825 }
4826
4827 if (-1 == rc) {
4828 char *slash;
4829 switch (errno) {
4830 case ENOENT:
4831 if (http_status_is_set(con)) break;
4832 /* check that parent collection exists */
4833 if ((slash = strrchr(dst_path->ptr, '/'))) {
4834 *slash = '\0';
4835 if (0 == lstat(dst_path->ptr, &st) && S_ISDIR(st.st_mode)) {
4836 *slash = '/';
4837 /* new entity will be created */
4838 if (!http_status_is_set(con))
4839 http_status_set_fin(con, 201); /* Created */
4840 break;
4841 }
4842 }
4843 /* fall through */
4844 /*case ENOTDIR:*/
4845 default:
4846 http_status_set_error(con, 409); /* Conflict */
4847 return HANDLER_FINISHED;
4848 }
4849 }
4850 else if (!(flags & WEBDAV_FLAG_OVERWRITE)) {
4851 /* destination exists, but overwrite is not set */
4852 http_status_set_error(con, 412); /* Precondition Failed */
4853 return HANDLER_FINISHED;
4854 }
4855 else if (S_ISDIR(st.st_mode)) {
4856 /* destination exists, but is a dir, not a file */
4857 http_status_set_error(con, 409); /* Conflict */
4858 return HANDLER_FINISHED;
4859 }
4860 else { /* resource already exists */
4861 http_status_set_fin(con, 204); /* No Content */
4862 }
4863
4864 rc = webdav_copymove_file(pconf, &con->physical, &dst, &flags);
4865 if (0 == rc) {
4866 if (con->request.http_method == HTTP_METHOD_MOVE)
4867 webdav_lock_delete_uri(pconf, con->physical.rel_path);
4868 }
4869 else
4870 http_status_set_error(con, rc);
4871
4872 return HANDLER_FINISHED;
4873 }
4874 }
4875
4876
4877 static handler_t
4878 mod_webdav_copymove (connection * const con, const plugin_config * const pconf)
4879 {
4880 buffer *dst_path = buffer_init();
4881 buffer *dst_rel_path = buffer_init();
4882 handler_t rc = mod_webdav_copymove_b(con, pconf, dst_path, dst_rel_path);
4883 buffer_free(dst_rel_path);
4884 buffer_free(dst_path);
4885 return rc;
4886 }
4887
4888
4889 #ifdef USE_PROPPATCH
4890 static handler_t
4891 mod_webdav_proppatch (connection * const con, const plugin_config * const pconf)
4892 {
4893 if (!pconf->sql) {
4894 http_header_response_set(con, HTTP_HEADER_OTHER,
4895 CONST_STR_LEN("Allow"),
4896 CONST_STR_LEN("GET, HEAD, PROPFIND, DELETE, "
4897 "MKCOL, PUT, MOVE, COPY"));
4898 http_status_set_error(con, 405); /* Method Not Allowed */
4899 return HANDLER_FINISHED;
4900 }
4901
4902 if (0 == con->request.content_length) {
4903 http_status_set_error(con, 400); /* Bad Request */
4904 return HANDLER_FINISHED;
4905 }
4906
4907 if (con->state == CON_STATE_READ_POST) {
4908 handler_t rc = connection_handle_read_post_state(pconf->srv, con);
4909 if (rc != HANDLER_GO_ON) return rc;
4910 }
4911
4912 struct stat st;
4913 if (0 != lstat(con->physical.path->ptr, &st)) {
4914 http_status_set_error(con, (errno == ENOENT) ? 404 : 403);
4915 return HANDLER_FINISHED;
4916 }
4917
4918 if (0 != webdav_if_match_or_unmodified_since(con, &st)) {
4919 http_status_set_error(con, 412); /* Precondition Failed */
4920 return HANDLER_FINISHED;
4921 }
4922
4923 if (S_ISDIR(st.st_mode)) {
4924 if (con->physical.path->ptr[con->physical.path->used - 2] != '/') {
4925 buffer *vb = http_header_request_get(con, HTTP_HEADER_OTHER,
4926 CONST_STR_LEN("User-Agent"));
4927 if (vb && 0 == strncmp(vb->ptr, "Microsoft-WebDAV-MiniRedir/",
4928 sizeof("Microsoft-WebDAV-MiniRedir/")-1)) {
4929 /* workaround Microsoft-WebDAV-MiniRedir bug */
4930 /* (might not be necessary for PROPPATCH here,
4931 * but match behavior in mod_webdav_propfind() for PROPFIND) */
4932 http_response_redirect_to_directory(pconf->srv, con, 308);
4933 return HANDLER_FINISHED;
4934 }
4935 /* set "Content-Location" instead of sending 308 redirect to dir */
4936 if (!http_response_redirect_to_directory(pconf->srv, con, 0))
4937 return HANDLER_FINISHED;
4938 buffer_append_string_len(con->physical.path, CONST_STR_LEN("/"));
4939 buffer_append_string_len(con->physical.rel_path,CONST_STR_LEN("/"));
4940 }
4941 }
4942 else if (con->physical.path->ptr[con->physical.path->used - 2] == '/') {
4943 http_status_set_error(con, 403);
4944 return HANDLER_FINISHED;
4945 }
4946
4947 xmlDocPtr const xml = webdav_parse_chunkqueue(con, pconf);
4948 if (NULL == xml) {
4949 http_status_set_error(con, 400); /* Bad Request */
4950 return HANDLER_FINISHED;
4951 }
4952
4953 const xmlNode * const rootnode = xmlDocGetRootElement(xml);
4954 if (NULL == rootnode
4955 || 0 != webdav_xmlstrcmp_fixed(rootnode->name, "propertyupdate")) {
4956 http_status_set_error(con, 422); /* Unprocessable Entity */
4957 xmlFreeDoc(xml);
4958 return HANDLER_FINISHED;
4959 }
4960
4961 if (!webdav_db_transaction_begin_immediate(pconf)) {
4962 http_status_set_error(con, 500); /* Internal Server Error */
4963 xmlFreeDoc(xml);
4964 return HANDLER_FINISHED;
4965 }
4966
4967 /* NOTE: selectively providing multi-status response is NON-CONFORMANT
4968 * (specified in [RFC4918])
4969 * However, PROPPATCH is all-or-nothing, so client should be able to
4970 * unequivocably know that all items in PROPPATCH succeeded if it receives
4971 * 204 No Content, or that items that are not listed with a failure status
4972 * in a multi-status response have the status of 424 Failed Dependency,
4973 * without the server having to be explicit. */
4974
4975 /* UPDATE request, we know 'set' and 'remove' */
4976 buffer *ms = NULL; /*(multi-status)*/
4977 int update;
4978 for (const xmlNode *cmd = rootnode->children; cmd; cmd = cmd->next) {
4979 if (!(update = (0 == webdav_xmlstrcmp_fixed(cmd->name, "set")))) {
4980 if (0 != webdav_xmlstrcmp_fixed(cmd->name, "remove"))
4981 continue; /* skip; not "set" or "remove" */
4982 }
4983
4984 for (const xmlNode *props = cmd->children; props; props = props->next) {
4985 if (0 != webdav_xmlstrcmp_fixed(props->name, "prop"))
4986 continue;
4987
4988 const xmlNode *prop = props->children;
4989 /* libxml2 will keep those blank (whitespace only) nodes */
4990 while (NULL != prop && xmlIsBlankNode(prop))
4991 prop = prop->next;
4992 if (NULL == prop)
4993 continue;
4994 if (prop->ns && '\0' == *(char *)prop->ns->href
4995 && '\0' != *(char *)prop->ns->prefix) {
4996 /* error: missing namespace for property */
4997 log_error(con->errh, __FILE__, __LINE__,
4998 "no namespace for: %s", prop->name);
4999 if (!ms) ms = buffer_init(); /* Unprocessable Entity */
5000 webdav_xml_propstat_status(ms, "", (char *)prop->name, 422);
5001 continue;
5002 }
5003
5004 /* XXX: ??? should blank namespace be normalized to "DAV:" ???
5005 * ??? should this also be done in propfind requests ??? */
5006
5007 if (prop->ns && 0 == strcmp((char *)prop->ns->href, "DAV:")) {
5008 const size_t namelen = strlen((char *)prop->name);
5009 const struct live_prop_list *list = protected_props;
5010 while (0 != list->len
5011 && (list->len != namelen
5012 || 0 != memcmp(prop->name, list->prop, list->len)))
5013 ++list;
5014 if (NULL != list->prop) {
5015 /* error <DAV:cannot-modify-protected-property/> */
5016 if (!ms) ms = buffer_init();
5017 webdav_xml_propstat_protected(ms, (char *)prop->name,
5018 namelen, 403); /* Forbidden */
5019 continue;
5020 }
5021 }
5022
5023 if (update) {
5024 if (!prop->children) continue;
5025 char * const propval = prop->children
5026 ? (char *)xmlNodeListGetString(xml, prop->children, 0)
5027 : NULL;
5028 webdav_prop_update(pconf, con->physical.rel_path,
5029 (char *)prop->name,
5030 prop->ns ? (char *)prop->ns->href : "",
5031 propval ? propval : "");
5032 xmlFree(propval);
5033 }
5034 else
5035 webdav_prop_delete(pconf, con->physical.rel_path,
5036 (char *)prop->name,
5037 prop->ns ? (char *)prop->ns->href : "");
5038 }
5039 }
5040
5041 if (NULL == ms
5042 ? webdav_db_transaction_commit(pconf)
5043 : webdav_db_transaction_rollback(pconf)) {
5044 if (NULL == ms) {
5045 buffer *vb = http_header_request_get(con, HTTP_HEADER_OTHER,
5046 CONST_STR_LEN("User-Agent"));
5047 if (vb && 0 == strncmp(vb->ptr, "Microsoft-WebDAV-MiniRedir/",
5048 sizeof("Microsoft-WebDAV-MiniRedir/")-1)) {
5049 /* workaround Microsoft-WebDAV-MiniRedir bug; 204 not handled */
5050 ms = buffer_init(); /* 207 Multi-status */
5051 webdav_xml_response_status(ms, con->physical.path, 200);
5052 }
5053 }
5054 if (NULL == ms)
5055 http_status_set_fin(con, 204); /* No Content */
5056 else /* 207 Multi-status */
5057 webdav_xml_doc_multistatus_response(con, pconf, ms);
5058 }
5059 else
5060 http_status_set_error(con, 500); /* Internal Server Error */
5061
5062 if (NULL != ms)
5063 buffer_free(ms);
5064
5065 xmlFreeDoc(xml);
5066 return HANDLER_FINISHED;
5067 }
5068 #endif
5069
5070
5071 #ifdef USE_LOCKS
5072 struct webdav_conflicting_lock_st {
5073 webdav_lockdata *lockdata;
5074 buffer *b;
5075 };
5076
5077
5078 static void
5079 webdav_conflicting_lock_cb (void * const vdata,
5080 const webdav_lockdata * const lockdata)
5081 {
5082 /* lock is not available if someone else has exclusive lock or if
5083 * client requested exclusive lock and others have shared locks */
5084 struct webdav_conflicting_lock_st * const cbdata =
5085 (struct webdav_conflicting_lock_st *)vdata;
5086 if (lockdata->lockscope->used == sizeof("exclusive")
5087 || cbdata->lockdata->lockscope->used == sizeof("exclusive"))
5088 webdav_xml_href(cbdata->b, &lockdata->lockroot);
5089 }
5090
5091
5092 static handler_t
5093 mod_webdav_lock (connection * const con, const plugin_config * const pconf)
5094 {
5095 /**
5096 * a mac wants to write
5097 *
5098 * LOCK /dav/expire.txt HTTP/1.1\r\n
5099 * User-Agent: WebDAVFS/1.3 (01308000) Darwin/8.1.0 (Power Macintosh)\r\n
5100 * Accept: * / *\r\n
5101 * Depth: 0\r\n
5102 * Timeout: Second-600\r\n
5103 * Content-Type: text/xml; charset=\"utf-8\"\r\n
5104 * Content-Length: 229\r\n
5105 * Connection: keep-alive\r\n
5106 * Host: 192.168.178.23:1025\r\n
5107 * \r\n
5108 * <?xml version=\"1.0\" encoding=\"utf-8\"?>\n
5109 * <D:lockinfo xmlns:D=\"DAV:\">\n
5110 * <D:lockscope><D:exclusive/></D:lockscope>\n
5111 * <D:locktype><D:write/></D:locktype>\n
5112 * <D:owner>\n
5113 * <D:href>http://www.apple.com/webdav_fs/</D:href>\n
5114 * </D:owner>\n
5115 * </D:lockinfo>\n
5116 */
5117
5118 if (con->request.content_length) {
5119 if (con->state == CON_STATE_READ_POST) {
5120 handler_t rc = connection_handle_read_post_state(pconf->srv, con);
5121 if (rc != HANDLER_GO_ON) return rc;
5122 }
5123 }
5124
5125 /* XXX: maybe add config switch to require that authentication occurred? */
5126 buffer owner = { NULL, 0, 0 };/*owner (not authenticated)(auth_user unset)*/
5127 data_string * const authn_user = (data_string *)
5128 array_get_element_klen(con->environment, CONST_STR_LEN("REMOTE_USER"));
5129
5130 /* future: make max timeout configurable (e.g. pconf->lock_timeout_max)
5131 *
5132 * [RFC4918] 10.7 Timeout Request Header
5133 * The "Second" TimeType specifies the number of seconds that will elapse
5134 * between granting of the lock at the server, and the automatic removal
5135 * of the lock. The timeout value for TimeType "Second" MUST NOT be
5136 * greater than 2^32-1.
5137 */
5138
5139 webdav_lockdata lockdata = {
5140 { NULL, 0, 0 }, /* locktoken */
5141 { con->physical.rel_path->ptr,con->physical.rel_path->used,0},/*lockroot*/
5142 { NULL, 0, 0 }, /* ownerinfo */
5143 (authn_user ? authn_user->value : &owner), /* owner */
5144 NULL, /* lockscope */
5145 NULL, /* locktype */
5146 -1, /* depth */
5147 600 /* timeout (arbitrary default lock timeout: 10 minutes) */
5148 };
5149
5150 const buffer *h =
5151 http_header_request_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Timeout"));
5152 if (!buffer_is_empty(h)) {
5153 /* loosely parse Timeout request header and ignore "infinity" timeout */
5154 /* future: might implement config param for upper limit for timeout */
5155 const char *p = h->ptr;
5156 do {
5157 if ((*p | 0x20) == 's'
5158 && 0 == strncasecmp(p, CONST_STR_LEN("second-"))) {
5159 long t = strtol(p+sizeof("second-")-1, NULL, 10);
5160 if (0 < t && t < lockdata.timeout)
5161 lockdata.timeout = t > 5 ? t : 5;
5162 /*(arbitrary min timeout: 5 secs)*/
5163 else if (sizeof(long) != sizeof(int) && t > INT32_MAX)
5164 lockdata.timeout = INT32_MAX;
5165 /* while UINT32_MAX is actual limit in RFC4918,
5166 * sqlite more easily supports int, though could be
5167 * changed to use int64 to for the timeout param.
5168 * The "limitation" between timeouts that are many
5169 * *years* long does not really matter in reality. */
5170 break;
5171 }
5172 #if 0
5173 else if ((*p | 0x20) == 'i'
5174 && 0 == strncasecmp(p, CONST_STR_LEN("infinity"))) {
5175 lockdata.timeout = INT32_MAX;
5176 break;
5177 }
5178 #endif
5179 while (*p != ',' && *p != '\0') ++p;
5180 while (*p == ' ' || *p == '\t') ++p;
5181 } while (*p != '\0');
5182 }
5183
5184 if (con->request.content_length) {
5185 lockdata.depth = webdav_parse_Depth(con);
5186 if (1 == lockdata.depth) {
5187 /* [RFC4918] 9.10.3 Depth and Locking
5188 * Values other than 0 or infinity MUST NOT be used
5189 * with the Depth header on a LOCK method.
5190 */
5191 http_status_set_error(con, 400); /* Bad Request */
5192 return HANDLER_FINISHED;
5193 }
5194
5195 xmlDocPtr const xml = webdav_parse_chunkqueue(con, pconf);
5196 if (NULL == xml) {
5197 http_status_set_error(con, 400); /* Bad Request */
5198 return HANDLER_FINISHED;
5199 }
5200
5201 const xmlNode * const rootnode = xmlDocGetRootElement(xml);
5202 if (NULL == rootnode
5203 || 0 != webdav_xmlstrcmp_fixed(rootnode->name, "lockinfo")) {
5204 http_status_set_error(con, 422); /* Unprocessable Entity */
5205 xmlFreeDoc(xml);
5206 return HANDLER_FINISHED;
5207 }
5208
5209 const xmlNode *lockinfo = rootnode->children;
5210 for (; lockinfo; lockinfo = lockinfo->next) {
5211 if (0 == webdav_xmlstrcmp_fixed(lockinfo->name, "lockscope")) {
5212 const xmlNode *value = lockinfo->children;
5213 for (; value; value = value->next) {
5214 if (0 == webdav_xmlstrcmp_fixed(value->name, "exclusive"))
5215 lockdata.lockscope=(const buffer *)&lockscope_exclusive;
5216 else if (0 == webdav_xmlstrcmp_fixed(value->name, "shared"))
5217 lockdata.lockscope=(const buffer *)&lockscope_shared;
5218 else {
5219 lockdata.lockscope=NULL; /* trigger error below loop */
5220 break;
5221 }
5222 }
5223 }
5224 else if (0 == webdav_xmlstrcmp_fixed(lockinfo->name, "locktype")) {
5225 const xmlNode *value = lockinfo->children;
5226 for (; value; value = value->next) {
5227 if (0 == webdav_xmlstrcmp_fixed(value->name, "write"))
5228 lockdata.locktype = (const buffer *)&locktype_write;
5229 else {
5230 lockdata.locktype = NULL;/* trigger error below loop */
5231 break;
5232 }
5233 }
5234 }
5235 else if (0 == webdav_xmlstrcmp_fixed(lockinfo->name, "owner")) {
5236 if (lockinfo->children)
5237 lockdata.ownerinfo.ptr =
5238 (char *)xmlNodeListGetString(xml, lockinfo->children, 0);
5239 if (lockdata.ownerinfo.ptr)
5240 lockdata.ownerinfo.used = strlen(lockdata.ownerinfo.ptr)+1;
5241 }
5242 }
5243
5244 do { /*(resources are cleaned up after code block)*/
5245
5246 if (NULL == lockdata.lockscope || NULL == lockdata.locktype) {
5247 /*(missing lockscope and locktype in lock request)*/
5248 http_status_set_error(con, 422); /* Unprocessable Entity */
5249 break; /* clean up resources and return HANDLER_FINISHED */
5250 }
5251
5252 /* check lock prior to potentially creating new resource,
5253 * and prior to using entropy to create uuid */
5254 struct webdav_conflicting_lock_st cbdata;
5255 cbdata.lockdata = &lockdata;
5256 cbdata.b = buffer_init();
5257 webdav_lock_activelocks(pconf, &lockdata.lockroot,
5258 (0 == lockdata.depth ? 1 : -1),
5259 webdav_conflicting_lock_cb, &cbdata);
5260 if (0 != cbdata.b->used) {
5261 /* 423 Locked */
5262 webdav_xml_doc_error_no_conflicting_lock(con, cbdata.b);
5263 buffer_free(cbdata.b);
5264 break; /* clean up resources and return HANDLER_FINISHED */
5265 }
5266 buffer_free(cbdata.b);
5267
5268 int created = 0;
5269 struct stat st;
5270 if (0 != lstat(con->physical.path->ptr, &st)) {
5271 /* [RFC4918] 7.3 Write Locks and Unmapped URLs
5272 * A successful lock request to an unmapped URL MUST result in
5273 * the creation of a locked (non-collection) resource with empty
5274 * content.
5275 * [...]
5276 * The response MUST indicate that a resource was created, by
5277 * use of the "201 Created" response code (a LOCK request to an
5278 * existing resource instead will result in 200 OK).
5279 * [RFC4918] 9.10.4 Locking Unmapped URLs
5280 * A successful LOCK method MUST result in the creation of an
5281 * empty resource that is locked (and that is not a collection)
5282 * when a resource did not previously exist at that URL. Later on,
5283 * the lock may go away but the empty resource remains. Empty
5284 * resources MUST then appear in PROPFIND responses including that
5285 * URL in the response scope. A server MUST respond successfully
5286 * to a GET request to an empty resource, either by using a 204
5287 * No Content response, or by using 200 OK with a Content-Length
5288 * header indicating zero length
5289 *
5290 * unmapped resource; create empty file
5291 * (open() should fail if path ends in '/', but does not on some OS.
5292 * This is desired behavior since collection should be created
5293 * with MKCOL, and not via LOCK on an unmapped resource) */
5294 const int fd =
5295 (errno == ENOENT
5296 && con->physical.path->ptr[con->physical.path->used-2] != '/')
5297 ? fdevent_open_cloexec(con->physical.path->ptr, 0,
5298 O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
5299 WEBDAV_FILE_MODE)
5300 : -1;
5301 if (fd >= 0) {
5302 /*(skip sending etag if fstat() error; not expected)*/
5303 if (0 != fstat(fd, &st)) con->etag_flags = 0;
5304 close(fd);
5305 created = 1;
5306 }
5307 else if (errno != EEXIST) {
5308 http_status_set_error(con, 403); /* Forbidden */
5309 break; /* clean up resources and return HANDLER_FINISHED */
5310 }
5311 else if (0 != lstat(con->physical.path->ptr, &st)) {
5312 http_status_set_error(con, 403); /* Forbidden */
5313 break; /* clean up resources and return HANDLER_FINISHED */
5314 }
5315 lockdata.depth = 0; /* force Depth: 0 on non-collections */
5316 }
5317
5318 if (!created) {
5319 if (0 != webdav_if_match_or_unmodified_since(con, &st)) {
5320 http_status_set_error(con, 412); /* Precondition Failed */
5321 break; /* clean up resources and return HANDLER_FINISHED */
5322 }
5323 }
5324
5325 if (created) {
5326 }
5327 else if (S_ISDIR(st.st_mode)) {
5328 if (con->physical.path->ptr[con->physical.path->used - 2] != '/') {
5329 /* 308 Permanent Redirect */
5330 http_response_redirect_to_directory(pconf->srv, con, 308);
5331 break; /* clean up resources and return HANDLER_FINISHED */
5332 /* Alternatively, could append '/' to con->physical.path
5333 * and con->physical.rel_path, set Content-Location in
5334 * response headers, and continue to serve the request */
5335 }
5336 }
5337 else if (con->physical.path->ptr[con->physical.path->used - 2] == '/') {
5338 http_status_set_error(con, 403); /* Forbidden */
5339 break; /* clean up resources and return HANDLER_FINISHED */
5340 }
5341 else if (0 != lockdata.depth)
5342 lockdata.depth = 0; /* force Depth: 0 on non-collections */
5343
5344 /* create locktoken
5345 * (uuid_unparse() output is 36 chars + '\0') */
5346 uuid_t id;
5347 char lockstr[sizeof("<urn:uuid:>") + 36] = "<urn:uuid:";
5348 lockdata.locktoken.ptr = lockstr+1; /*(without surrounding <>)*/
5349 lockdata.locktoken.used = sizeof(lockstr)-2;/*(without surrounding <>)*/
5350 uuid_generate(id);
5351 uuid_unparse(id, lockstr+sizeof("<urn:uuid:")-1);
5352
5353 /* XXX: consider fix TOC-TOU race condition by starting transaction
5354 * and re-running webdav_lock_activelocks() check before running
5355 * webdav_lock_acquire() (but both routines would need to be modified
5356 * to defer calling sqlite3_reset(stmt) to be part of transaction) */
5357 if (webdav_lock_acquire(pconf, &lockdata)) {
5358 lockstr[sizeof(lockstr)-2] = '>';
5359 http_header_response_set(con, HTTP_HEADER_OTHER,
5360 CONST_STR_LEN("Lock-Token"),
5361 lockstr, sizeof(lockstr)-1);
5362 webdav_xml_doc_lock_acquired(con, pconf, &lockdata);
5363 if (0 != con->etag_flags && !S_ISDIR(st.st_mode))
5364 webdav_response_etag(pconf->srv, con, &st);
5365 http_status_set_fin(con, created ? 201 : 200); /* Created | OK */
5366 }
5367 else /*(database error obtaining lock)*/
5368 http_status_set_error(con, 500); /* Internal Server Error */
5369
5370 } while (0); /*(resources are cleaned up after code block)*/
5371
5372 xmlFree(lockdata.ownerinfo.ptr);
5373 xmlFreeDoc(xml);
5374 return HANDLER_FINISHED;
5375 }
5376 else {
5377 h = http_header_request_get(con,HTTP_HEADER_OTHER,CONST_STR_LEN("If"));
5378 if (NULL == h
5379 || h->used < 6 || h->ptr[1] != '<' || h->ptr[h->used-3] != '>') {
5380 /*(rejects value with trailing LWS, even though RFC-permitted)*/
5381 http_status_set_error(con, 400); /* Bad Request */
5382 return HANDLER_FINISHED;
5383 }
5384 /* remove (< >) around token */
5385 lockdata.locktoken.ptr = h->ptr+2;
5386 lockdata.locktoken.used = h->used-4;
5387 /*(future: fill in from database, though exclusive write lock is the
5388 * only lock supported at the moment)*/
5389 lockdata.lockscope = (const buffer *)&lockscope_exclusive;
5390 lockdata.locktype = (const buffer *)&locktype_write;
5391 lockdata.depth = 0;
5392
5393 if (webdav_lock_refresh(pconf, &lockdata)) {
5394 webdav_xml_doc_lock_acquired(con, pconf, &lockdata);
5395 http_status_set_fin(con, 200); /* OK */
5396 }
5397 else
5398 http_status_set_error(con, 412); /* Precondition Failed */
5399
5400 return HANDLER_FINISHED;
5401 }
5402 }
5403 #endif
5404
5405
5406 #ifdef USE_LOCKS
5407 static handler_t
5408 mod_webdav_unlock (connection * const con, const plugin_config * const pconf)
5409 {
5410 const buffer * const h =
5411 http_header_request_get(con, HTTP_HEADER_OTHER,
5412 CONST_STR_LEN("Lock-Token"));
5413 if (NULL == h
5414 || h->used < 4 || h->ptr[0] != '<' || h->ptr[h->used-2] != '>') {
5415 /*(rejects value with trailing LWS, even though RFC-permitted)*/
5416 http_status_set_error(con, 400); /* Bad Request */
5417 return HANDLER_FINISHED;
5418 }
5419
5420 buffer owner = { NULL, 0, 0 };/*owner (not authenticated)(auth_user unset)*/
5421 data_string * const authn_user = (data_string *)
5422 array_get_element_klen(con->environment, CONST_STR_LEN("REMOTE_USER"));
5423
5424 webdav_lockdata lockdata = {
5425 { h->ptr+1, h->used-2, 0 }, /* locktoken (remove < > around token) */
5426 { con->physical.rel_path->ptr,con->physical.rel_path->used,0},/*lockroot*/
5427 { NULL, 0, 0 }, /* ownerinfo (unused for unlock) */
5428 (authn_user ? authn_user->value : &owner), /* owner */
5429 NULL, /* lockscope (unused for unlock) */
5430 NULL, /* locktype (unused for unlock) */
5431 0, /* depth (unused for unlock) */
5432 0 /* timeout (unused for unlock) */
5433 };
5434
5435 /* check URI (lockroot) and depth in scope for locktoken and authorized */
5436 switch (webdav_lock_match(pconf, &lockdata)) {
5437 case 0:
5438 if (webdav_lock_release(pconf, &lockdata)) {
5439 http_status_set_fin(con, 204); /* No Content */
5440 return HANDLER_FINISHED;
5441 }
5442 /* fall through */
5443 default:
5444 case -1: /* lock does not exist */
5445 case -2: /* URI not in scope of locktoken and depth */
5446 /* 409 Conflict */
5447 webdav_xml_doc_error_lock_token_matches_request_uri(con);
5448 return HANDLER_FINISHED;
5449 case -3: /* not owner/not authorized to remove lock */
5450 http_status_set_error(con, 403); /* Forbidden */
5451 return HANDLER_FINISHED;
5452 }
5453 }
5454 #endif
5455
5456
5457 SUBREQUEST_FUNC(mod_webdav_subrequest_handler)
5458 {
5459 const plugin_config * const pconf =
5460 (plugin_config *)con->plugin_ctx[((plugin_data *)p_d)->id];
5461 if (NULL == pconf) return HANDLER_GO_ON; /*(should not happen)*/
5462 UNUSED(srv);
5463
5464 switch (con->request.http_method) {
5465 case HTTP_METHOD_PROPFIND:
5466 return mod_webdav_propfind(con, pconf);
5467 case HTTP_METHOD_MKCOL:
5468 return mod_webdav_mkcol(con, pconf);
5469 case HTTP_METHOD_DELETE:
5470 return mod_webdav_delete(con, pconf);
5471 case HTTP_METHOD_PUT:
5472 return mod_webdav_put(con, pconf);
5473 case HTTP_METHOD_MOVE:
5474 case HTTP_METHOD_COPY:
5475 return mod_webdav_copymove(con, pconf);
5476 #ifdef USE_PROPPATCH
5477 case HTTP_METHOD_PROPPATCH:
5478 return mod_webdav_proppatch(con, pconf);
5479 #endif
5480 #ifdef USE_LOCKS
5481 case HTTP_METHOD_LOCK:
5482 return mod_webdav_lock(con, pconf);
5483 case HTTP_METHOD_UNLOCK:
5484 return mod_webdav_unlock(con, pconf);
5485 #endif
5486 default:
5487 http_status_set_error(con, 501); /* Not Implemented */
5488 return HANDLER_FINISHED;
5489 }
5490 }
5491
5492
5493 PHYSICALPATH_FUNC(mod_webdav_physical_handler)
5494 {
5495 /* physical path is set up */
5496 /*assert(0 != con->physical.path->used);*/
5497 #ifdef __COVERITY__
5498 force_assert(2 <= con->physical.path->used);
5499 #endif
5500
5501 int check_readonly = 0;
5502 int check_lock_src = 0;
5503 int reject_reqbody = 0;
5504
5505 /* check for WebDAV request methods handled by this module */
5506 switch (con->request.http_method) {
5507 case HTTP_METHOD_GET:
5508 case HTTP_METHOD_HEAD:
5509 case HTTP_METHOD_POST:
5510 default:
5511 return HANDLER_GO_ON;
5512 case HTTP_METHOD_PROPFIND:
5513 case HTTP_METHOD_LOCK:
5514 break;
5515 case HTTP_METHOD_UNLOCK:
5516 reject_reqbody = 1;
5517 break;
5518 case HTTP_METHOD_DELETE:
5519 case HTTP_METHOD_MOVE:
5520 reject_reqbody = 1; /*(fall through)*/ __attribute_fallthrough__
5521 case HTTP_METHOD_PROPPATCH:
5522 case HTTP_METHOD_PUT:
5523 check_readonly = check_lock_src = 1;
5524 break;
5525 case HTTP_METHOD_COPY:
5526 case HTTP_METHOD_MKCOL:
5527 check_readonly = reject_reqbody = 1;
5528 break;
5529 }
5530
5531 plugin_config pconf;
5532 mod_webdav_patch_connection(srv, con, (plugin_data *)p_d, &pconf);
5533 if (!pconf.enabled) return HANDLER_GO_ON;
5534
5535 if (check_readonly && pconf.is_readonly) {
5536 http_status_set_error(con, 403); /* Forbidden */
5537 return HANDLER_FINISHED;
5538 }
5539
5540 if (reject_reqbody && con->request.content_length) {
5541 /* [RFC4918] 8.4 Required Bodies in Requests
5542 * Servers MUST examine all requests for a body, even when a
5543 * body was not expected. In cases where a request body is
5544 * present but would be ignored by a server, the server MUST
5545 * reject the request with 415 (Unsupported Media Type).
5546 */
5547 http_status_set_error(con, 415); /* Unsupported Media Type */
5548 return HANDLER_FINISHED;
5549 }
5550
5551 if (check_lock_src && !webdav_has_lock(con, &pconf, con->physical.rel_path))
5552 return HANDLER_FINISHED; /* 423 Locked */
5553
5554 /* initial setup for methods */
5555 switch (con->request.http_method) {
5556 case HTTP_METHOD_PUT:
5557 if (mod_webdav_put_prep(con, &pconf) == HANDLER_FINISHED)
5558 return HANDLER_FINISHED;
5559 break;
5560 default:
5561 break;
5562 }
5563
5564 con->mode = ((plugin_data *)p_d)->id;
5565 con->conf.stream_request_body = 0;
5566 con->plugin_ctx[((plugin_data *)p_d)->id] = &pconf;
5567 const handler_t rc =
5568 mod_webdav_subrequest_handler(srv, con, p_d); /*p->handle_subrequest()*/
5569 if (rc == HANDLER_FINISHED || rc == HANDLER_ERROR)
5570 con->plugin_ctx[((plugin_data *)p_d)->id] = NULL;
5571 else { /* e.g. HANDLER_WAIT_FOR_RD */
5572 plugin_config * const save_pconf =
5573 (plugin_config *)malloc(sizeof(pconf));
5574 force_assert(save_pconf);
5575 memcpy(save_pconf, &pconf, sizeof(pconf));
5576 con->plugin_ctx[((plugin_data *)p_d)->id] = save_pconf;
5577 }
5578 return rc;
5579 }
5580
5581
5582 CONNECTION_FUNC(mod_webdav_handle_reset) {
5583 /* free plugin_config if allocated and saved to per-request storage */
5584 void ** const restrict dptr = &con->plugin_ctx[((plugin_data *)p_d)->id];
5585 if (*dptr) {
5586 free(*dptr);
5587 *dptr = NULL;
5588 chunkqueue_set_tempdirs(con->request_content_queue, /* reset sz */
5589 con->request_content_queue->tempdirs, 0);
5590 }
5591 UNUSED(srv);
5592 return HANDLER_GO_ON;
5593 }
A fast webserver with minimal memory-footprint (lighttpd)