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http-push, http-walker: style fixes
[git/spearce.git] / http-push.c
blob64c9bb0f90d70c414aa9cbb15f188789ce087ad1
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12 #include "list-objects.h"
13 #include "sigchain.h"
14
15 #include <expat.h>
16
17 static const char http_push_usage[] =
18 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
19
20 #ifndef XML_STATUS_OK
21 enum XML_Status {
22 XML_STATUS_OK = 1,
23 XML_STATUS_ERROR = 0
24 };
25 #define XML_STATUS_OK 1
26 #define XML_STATUS_ERROR 0
27 #endif
28
29 #define PREV_BUF_SIZE 4096
30 #define RANGE_HEADER_SIZE 30
31
32 /* DAV methods */
33 #define DAV_LOCK "LOCK"
34 #define DAV_MKCOL "MKCOL"
35 #define DAV_MOVE "MOVE"
36 #define DAV_PROPFIND "PROPFIND"
37 #define DAV_PUT "PUT"
38 #define DAV_UNLOCK "UNLOCK"
39 #define DAV_DELETE "DELETE"
40
41 /* DAV lock flags */
42 #define DAV_PROP_LOCKWR (1u << 0)
43 #define DAV_PROP_LOCKEX (1u << 1)
44 #define DAV_LOCK_OK (1u << 2)
45
46 /* DAV XML properties */
47 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
48 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
49 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
50 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
51 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
52 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
53 #define DAV_PROPFIND_RESP ".multistatus.response"
54 #define DAV_PROPFIND_NAME ".multistatus.response.href"
55 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
56
57 /* DAV request body templates */
58 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
59 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
60 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
61
62 #define LOCK_TIME 600
63 #define LOCK_REFRESH 30
64
65 /* bits #0-15 in revision.h */
66
67 #define LOCAL (1u<<16)
68 #define REMOTE (1u<<17)
69 #define FETCHING (1u<<18)
70 #define PUSHING (1u<<19)
71
72 /* We allow "recursive" symbolic refs. Only within reason, though */
73 #define MAXDEPTH 5
74
75 static int pushing;
76 static int aborted;
77 static signed char remote_dir_exists[256];
78
79 static struct curl_slist *no_pragma_header;
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85
86 static struct object_list *objects;
87
88 struct repo
89 {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *repo;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE,
112 };
113
114 struct transfer_request
115 {
116 struct object *obj;
117 char *url;
118 char *dest;
119 struct remote_lock *lock;
120 struct curl_slist *headers;
121 struct buffer buffer;
122 char filename[PATH_MAX];
123 char tmpfile[PATH_MAX];
124 int local_fileno;
125 FILE *local_stream;
126 enum transfer_state state;
127 CURLcode curl_result;
128 char errorstr[CURL_ERROR_SIZE];
129 long http_code;
130 unsigned char real_sha1[20];
131 git_SHA_CTX c;
132 z_stream stream;
133 int zret;
134 int rename;
135 void *userData;
136 struct active_request_slot *slot;
137 struct transfer_request *next;
138 };
139
140 static struct transfer_request *request_queue_head;
141
142 struct xml_ctx
143 {
144 char *name;
145 int len;
146 char *cdata;
147 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
148 void *userData;
149 };
150
151 struct remote_lock
152 {
153 char *url;
154 char *owner;
155 char *token;
156 char tmpfile_suffix[41];
157 time_t start_time;
158 long timeout;
159 int refreshing;
160 struct remote_lock *next;
161 };
162
163 /* Flags that control remote_ls processing */
164 #define PROCESS_FILES (1u << 0)
165 #define PROCESS_DIRS (1u << 1)
166 #define RECURSIVE (1u << 2)
167
168 /* Flags that remote_ls passes to callback functions */
169 #define IS_DIR (1u << 0)
170
171 struct remote_ls_ctx
172 {
173 char *path;
174 void (*userFunc)(struct remote_ls_ctx *ls);
175 void *userData;
176 int flags;
177 char *dentry_name;
178 int dentry_flags;
179 struct remote_ls_ctx *parent;
180 };
181
182 /* get_dav_token_headers options */
183 enum dav_header_flag {
184 DAV_HEADER_IF = (1u << 0),
185 DAV_HEADER_LOCK = (1u << 1),
186 DAV_HEADER_TIMEOUT = (1u << 2)
187 };
188
189 static char *xml_entities(char *s)
190 {
191 struct strbuf buf = STRBUF_INIT;
192 while (*s) {
193 size_t len = strcspn(s, "\"<>&");
194 strbuf_add(&buf, s, len);
195 s += len;
196 switch (*s) {
197 case '"':
198 strbuf_addstr(&buf, "&quot;");
199 break;
200 case '<':
201 strbuf_addstr(&buf, "&lt;");
202 break;
203 case '>':
204 strbuf_addstr(&buf, "&gt;");
205 break;
206 case '&':
207 strbuf_addstr(&buf, "&amp;");
208 break;
209 }
210 s++;
211 }
212 return strbuf_detach(&buf, NULL);
213 }
214
215 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
216 {
217 struct strbuf buf = STRBUF_INIT;
218 struct curl_slist *dav_headers = NULL;
219
220 if (options & DAV_HEADER_IF) {
221 strbuf_addf(&buf, "If: (<%s>)", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_LOCK) {
226 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 if (options & DAV_HEADER_TIMEOUT) {
231 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
232 dav_headers = curl_slist_append(dav_headers, buf.buf);
233 strbuf_reset(&buf);
234 }
235 strbuf_release(&buf);
236
237 return dav_headers;
238 }
239
240 static void append_remote_object_url(struct strbuf *buf, const char *url,
241 const char *hex,
242 int only_two_digit_prefix)
243 {
244 strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
245 if (!only_two_digit_prefix)
246 strbuf_addf(buf, "%s", hex+2);
247 }
248
249 static void finish_request(struct transfer_request *request);
250 static void release_request(struct transfer_request *request);
251
252 static void process_response(void *callback_data)
253 {
254 struct transfer_request *request =
255 (struct transfer_request *)callback_data;
256
257 finish_request(request);
258 }
259
260 #ifdef USE_CURL_MULTI
261
262 static char *get_remote_object_url(const char *url, const char *hex,
263 int only_two_digit_prefix)
264 {
265 struct strbuf buf = STRBUF_INIT;
266 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
267 return strbuf_detach(&buf, NULL);
268 }
269
270 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
271 void *data)
272 {
273 unsigned char expn[4096];
274 size_t size = eltsize * nmemb;
275 int posn = 0;
276 struct transfer_request *request = (struct transfer_request *)data;
277 do {
278 ssize_t retval = xwrite(request->local_fileno,
279 (char *) ptr + posn, size - posn);
280 if (retval < 0)
281 return posn;
282 posn += retval;
283 } while (posn < size);
284
285 request->stream.avail_in = size;
286 request->stream.next_in = ptr;
287 do {
288 request->stream.next_out = expn;
289 request->stream.avail_out = sizeof(expn);
290 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
291 git_SHA1_Update(&request->c, expn,
292 sizeof(expn) - request->stream.avail_out);
293 } while (request->stream.avail_in && request->zret == Z_OK);
294 data_received++;
295 return size;
296 }
297
298 static void start_fetch_loose(struct transfer_request *request)
299 {
300 char *hex = sha1_to_hex(request->obj->sha1);
301 char *filename;
302 char prevfile[PATH_MAX];
303 char *url;
304 int prevlocal;
305 unsigned char prev_buf[PREV_BUF_SIZE];
306 ssize_t prev_read = 0;
307 long prev_posn = 0;
308 char range[RANGE_HEADER_SIZE];
309 struct curl_slist *range_header = NULL;
310 struct active_request_slot *slot;
311
312 filename = sha1_file_name(request->obj->sha1);
313 snprintf(request->filename, sizeof(request->filename), "%s", filename);
314 snprintf(request->tmpfile, sizeof(request->tmpfile),
315 "%s.temp", filename);
316
317 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
318 unlink_or_warn(prevfile);
319 rename(request->tmpfile, prevfile);
320 unlink_or_warn(request->tmpfile);
321
322 if (request->local_fileno != -1)
323 error("fd leakage in start: %d", request->local_fileno);
324 request->local_fileno = open(request->tmpfile,
325 O_WRONLY | O_CREAT | O_EXCL, 0666);
326 /*
327 * This could have failed due to the "lazy directory creation";
328 * try to mkdir the last path component.
329 */
330 if (request->local_fileno < 0 && errno == ENOENT) {
331 char *dir = strrchr(request->tmpfile, '/');
332 if (dir) {
333 *dir = 0;
334 mkdir(request->tmpfile, 0777);
335 *dir = '/';
336 }
337 request->local_fileno = open(request->tmpfile,
338 O_WRONLY | O_CREAT | O_EXCL, 0666);
339 }
340
341 if (request->local_fileno < 0) {
342 request->state = ABORTED;
343 error("Couldn't create temporary file %s for %s: %s",
344 request->tmpfile, request->filename, strerror(errno));
345 return;
346 }
347
348 memset(&request->stream, 0, sizeof(request->stream));
349
350 git_inflate_init(&request->stream);
351
352 git_SHA1_Init(&request->c);
353
354 url = get_remote_object_url(repo->url, hex, 0);
355 request->url = xstrdup(url);
356
357 /*
358 * If a previous temp file is present, process what was already
359 * fetched.
360 */
361 prevlocal = open(prevfile, O_RDONLY);
362 if (prevlocal != -1) {
363 do {
364 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
365 if (prev_read>0) {
366 if (fwrite_sha1_file(prev_buf,
367 1,
368 prev_read,
369 request) == prev_read)
370 prev_posn += prev_read;
371 else
372 prev_read = -1;
373 }
374 } while (prev_read > 0);
375 close(prevlocal);
376 }
377 unlink_or_warn(prevfile);
378
379 /*
380 * Reset inflate/SHA1 if there was an error reading the previous temp
381 * file; also rewind to the beginning of the local file.
382 */
383 if (prev_read == -1) {
384 memset(&request->stream, 0, sizeof(request->stream));
385 git_inflate_init(&request->stream);
386 git_SHA1_Init(&request->c);
387 if (prev_posn>0) {
388 prev_posn = 0;
389 lseek(request->local_fileno, 0, SEEK_SET);
390 ftruncate(request->local_fileno, 0);
391 }
392 }
393
394 slot = get_active_slot();
395 slot->callback_func = process_response;
396 slot->callback_data = request;
397 request->slot = slot;
398
399 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
400 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
401 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
402 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
403 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
404
405 /*
406 * If we have successfully processed data from a previous fetch
407 * attempt, only fetch the data we don't already have.
408 */
409 if (prev_posn>0) {
410 if (push_verbosely)
411 fprintf(stderr,
412 "Resuming fetch of object %s at byte %ld\n",
413 hex, prev_posn);
414 sprintf(range, "Range: bytes=%ld-", prev_posn);
415 range_header = curl_slist_append(range_header, range);
416 curl_easy_setopt(slot->curl,
417 CURLOPT_HTTPHEADER, range_header);
418 }
419
420 /* Try to get the request started, abort the request on error */
421 request->state = RUN_FETCH_LOOSE;
422 if (!start_active_slot(slot)) {
423 fprintf(stderr, "Unable to start GET request\n");
424 repo->can_update_info_refs = 0;
425 release_request(request);
426 }
427 }
428
429 static void start_mkcol(struct transfer_request *request)
430 {
431 char *hex = sha1_to_hex(request->obj->sha1);
432 struct active_request_slot *slot;
433
434 request->url = get_remote_object_url(repo->url, hex, 1);
435
436 slot = get_active_slot();
437 slot->callback_func = process_response;
438 slot->callback_data = request;
439 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
440 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
441 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
442 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
443 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
444
445 if (start_active_slot(slot)) {
446 request->slot = slot;
447 request->state = RUN_MKCOL;
448 } else {
449 request->state = ABORTED;
450 free(request->url);
451 request->url = NULL;
452 }
453 }
454 #endif
455
456 static void start_fetch_packed(struct transfer_request *request)
457 {
458 char *url;
459 struct packed_git *target;
460 FILE *packfile;
461 char *filename;
462 long prev_posn = 0;
463 char range[RANGE_HEADER_SIZE];
464 struct curl_slist *range_header = NULL;
465
466 struct transfer_request *check_request = request_queue_head;
467 struct active_request_slot *slot;
468
469 target = find_sha1_pack(request->obj->sha1, repo->packs);
470 if (!target) {
471 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
472 repo->can_update_info_refs = 0;
473 release_request(request);
474 return;
475 }
476
477 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
478 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
479
480 filename = sha1_pack_name(target->sha1);
481 snprintf(request->filename, sizeof(request->filename), "%s", filename);
482 snprintf(request->tmpfile, sizeof(request->tmpfile),
483 "%s.temp", filename);
484
485 url = xmalloc(strlen(repo->url) + 64);
486 sprintf(url, "%sobjects/pack/pack-%s.pack",
487 repo->url, sha1_to_hex(target->sha1));
488
489 /* Make sure there isn't another open request for this pack */
490 while (check_request) {
491 if (check_request->state == RUN_FETCH_PACKED &&
492 !strcmp(check_request->url, url)) {
493 free(url);
494 release_request(request);
495 return;
496 }
497 check_request = check_request->next;
498 }
499
500 packfile = fopen(request->tmpfile, "a");
501 if (!packfile) {
502 fprintf(stderr, "Unable to open local file %s for pack",
503 request->tmpfile);
504 repo->can_update_info_refs = 0;
505 free(url);
506 return;
507 }
508
509 slot = get_active_slot();
510 slot->callback_func = process_response;
511 slot->callback_data = request;
512 request->slot = slot;
513 request->local_stream = packfile;
514 request->userData = target;
515
516 request->url = url;
517 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
518 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
519 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
520 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
521 slot->local = packfile;
522
523 /*
524 * If there is data present from a previous transfer attempt,
525 * resume where it left off
526 */
527 prev_posn = ftell(packfile);
528 if (prev_posn>0) {
529 if (push_verbosely)
530 fprintf(stderr,
531 "Resuming fetch of pack %s at byte %ld\n",
532 sha1_to_hex(target->sha1), prev_posn);
533 sprintf(range, "Range: bytes=%ld-", prev_posn);
534 range_header = curl_slist_append(range_header, range);
535 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
536 }
537
538 /* Try to get the request started, abort the request on error */
539 request->state = RUN_FETCH_PACKED;
540 if (!start_active_slot(slot)) {
541 fprintf(stderr, "Unable to start GET request\n");
542 repo->can_update_info_refs = 0;
543 release_request(request);
544 }
545 }
546
547 static void start_put(struct transfer_request *request)
548 {
549 char *hex = sha1_to_hex(request->obj->sha1);
550 struct active_request_slot *slot;
551 struct strbuf buf = STRBUF_INIT;
552 enum object_type type;
553 char hdr[50];
554 void *unpacked;
555 unsigned long len;
556 int hdrlen;
557 ssize_t size;
558 z_stream stream;
559
560 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
561 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
562
563 /* Set it up */
564 memset(&stream, 0, sizeof(stream));
565 deflateInit(&stream, zlib_compression_level);
566 size = deflateBound(&stream, len + hdrlen);
567 strbuf_init(&request->buffer.buf, size);
568 request->buffer.posn = 0;
569
570 /* Compress it */
571 stream.next_out = (unsigned char *)request->buffer.buf.buf;
572 stream.avail_out = size;
573
574 /* First header.. */
575 stream.next_in = (void *)hdr;
576 stream.avail_in = hdrlen;
577 while (deflate(&stream, 0) == Z_OK)
578 /* nothing */;
579
580 /* Then the data itself.. */
581 stream.next_in = unpacked;
582 stream.avail_in = len;
583 while (deflate(&stream, Z_FINISH) == Z_OK)
584 /* nothing */;
585 deflateEnd(&stream);
586 free(unpacked);
587
588 request->buffer.buf.len = stream.total_out;
589
590 strbuf_addstr(&buf, "Destination: ");
591 append_remote_object_url(&buf, repo->url, hex, 0);
592 request->dest = strbuf_detach(&buf, NULL);
593
594 append_remote_object_url(&buf, repo->url, hex, 0);
595 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
596 request->url = strbuf_detach(&buf, NULL);
597
598 slot = get_active_slot();
599 slot->callback_func = process_response;
600 slot->callback_data = request;
601 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
602 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
603 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
604 #ifndef NO_CURL_IOCTL
605 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
606 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
607 #endif
608 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
609 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
610 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
611 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
612 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
613 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
614
615 if (start_active_slot(slot)) {
616 request->slot = slot;
617 request->state = RUN_PUT;
618 } else {
619 request->state = ABORTED;
620 free(request->url);
621 request->url = NULL;
622 }
623 }
624
625 static void start_move(struct transfer_request *request)
626 {
627 struct active_request_slot *slot;
628 struct curl_slist *dav_headers = NULL;
629
630 slot = get_active_slot();
631 slot->callback_func = process_response;
632 slot->callback_data = request;
633 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
634 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
635 dav_headers = curl_slist_append(dav_headers, request->dest);
636 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
637 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
638 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
639 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
640
641 if (start_active_slot(slot)) {
642 request->slot = slot;
643 request->state = RUN_MOVE;
644 } else {
645 request->state = ABORTED;
646 free(request->url);
647 request->url = NULL;
648 }
649 }
650
651 static int refresh_lock(struct remote_lock *lock)
652 {
653 struct active_request_slot *slot;
654 struct slot_results results;
655 struct curl_slist *dav_headers;
656 int rc = 0;
657
658 lock->refreshing = 1;
659
660 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
661
662 slot = get_active_slot();
663 slot->results = &results;
664 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
665 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
666 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
667 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
668 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
669
670 if (start_active_slot(slot)) {
671 run_active_slot(slot);
672 if (results.curl_result != CURLE_OK) {
673 fprintf(stderr, "LOCK HTTP error %ld\n",
674 results.http_code);
675 } else {
676 lock->start_time = time(NULL);
677 rc = 1;
678 }
679 }
680
681 lock->refreshing = 0;
682 curl_slist_free_all(dav_headers);
683
684 return rc;
685 }
686
687 static void check_locks(void)
688 {
689 struct remote_lock *lock = repo->locks;
690 time_t current_time = time(NULL);
691 int time_remaining;
692
693 while (lock) {
694 time_remaining = lock->start_time + lock->timeout -
695 current_time;
696 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
697 if (!refresh_lock(lock)) {
698 fprintf(stderr,
699 "Unable to refresh lock for %s\n",
700 lock->url);
701 aborted = 1;
702 return;
703 }
704 }
705 lock = lock->next;
706 }
707 }
708
709 static void release_request(struct transfer_request *request)
710 {
711 struct transfer_request *entry = request_queue_head;
712
713 if (request == request_queue_head) {
714 request_queue_head = request->next;
715 } else {
716 while (entry->next != NULL && entry->next != request)
717 entry = entry->next;
718 if (entry->next == request)
719 entry->next = entry->next->next;
720 }
721
722 if (request->local_fileno != -1)
723 close(request->local_fileno);
724 if (request->local_stream)
725 fclose(request->local_stream);
726 free(request->url);
727 free(request);
728 }
729
730 static void finish_request(struct transfer_request *request)
731 {
732 struct stat st;
733 struct packed_git *target;
734 struct packed_git **lst;
735 struct active_request_slot *slot;
736
737 request->curl_result = request->slot->curl_result;
738 request->http_code = request->slot->http_code;
739 slot = request->slot;
740 request->slot = NULL;
741
742 /* Keep locks active */
743 check_locks();
744
745 if (request->headers != NULL)
746 curl_slist_free_all(request->headers);
747
748 /* URL is reused for MOVE after PUT */
749 if (request->state != RUN_PUT) {
750 free(request->url);
751 request->url = NULL;
752 }
753
754 if (request->state == RUN_MKCOL) {
755 if (request->curl_result == CURLE_OK ||
756 request->http_code == 405) {
757 remote_dir_exists[request->obj->sha1[0]] = 1;
758 start_put(request);
759 } else {
760 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
761 sha1_to_hex(request->obj->sha1),
762 request->curl_result, request->http_code);
763 request->state = ABORTED;
764 aborted = 1;
765 }
766 } else if (request->state == RUN_PUT) {
767 if (request->curl_result == CURLE_OK) {
768 start_move(request);
769 } else {
770 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
771 sha1_to_hex(request->obj->sha1),
772 request->curl_result, request->http_code);
773 request->state = ABORTED;
774 aborted = 1;
775 }
776 } else if (request->state == RUN_MOVE) {
777 if (request->curl_result == CURLE_OK) {
778 if (push_verbosely)
779 fprintf(stderr, " sent %s\n",
780 sha1_to_hex(request->obj->sha1));
781 request->obj->flags |= REMOTE;
782 release_request(request);
783 } else {
784 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
785 sha1_to_hex(request->obj->sha1),
786 request->curl_result, request->http_code);
787 request->state = ABORTED;
788 aborted = 1;
789 }
790 } else if (request->state == RUN_FETCH_LOOSE) {
791 close(request->local_fileno);
792 request->local_fileno = -1;
793
794 if (request->curl_result != CURLE_OK &&
795 request->http_code != 416) {
796 if (stat(request->tmpfile, &st) == 0) {
797 if (st.st_size == 0)
798 unlink_or_warn(request->tmpfile);
799 }
800 } else {
801 if (request->http_code == 416)
802 warning("requested range invalid; we may already have all the data.");
803
804 git_inflate_end(&request->stream);
805 git_SHA1_Final(request->real_sha1, &request->c);
806 if (request->zret != Z_STREAM_END) {
807 unlink_or_warn(request->tmpfile);
808 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
809 unlink_or_warn(request->tmpfile);
810 } else {
811 request->rename =
812 move_temp_to_file(
813 request->tmpfile,
814 request->filename);
815 if (request->rename == 0)
816 request->obj->flags |= (LOCAL | REMOTE);
817 }
818 }
819
820 /* Try fetching packed if necessary */
821 if (request->obj->flags & LOCAL)
822 release_request(request);
823 else
824 start_fetch_packed(request);
825
826 } else if (request->state == RUN_FETCH_PACKED) {
827 if (request->curl_result != CURLE_OK) {
828 fprintf(stderr, "Unable to get pack file %s\n%s",
829 request->url, curl_errorstr);
830 repo->can_update_info_refs = 0;
831 } else {
832 off_t pack_size = ftell(request->local_stream);
833
834 fclose(request->local_stream);
835 request->local_stream = NULL;
836 slot->local = NULL;
837 if (!move_temp_to_file(request->tmpfile,
838 request->filename)) {
839 target = (struct packed_git *)request->userData;
840 target->pack_size = pack_size;
841 lst = &repo->packs;
842 while (*lst != target)
843 lst = &((*lst)->next);
844 *lst = (*lst)->next;
845
846 if (!verify_pack(target))
847 install_packed_git(target);
848 else
849 repo->can_update_info_refs = 0;
850 }
851 }
852 release_request(request);
853 }
854 }
855
856 #ifdef USE_CURL_MULTI
857 static int is_running_queue;
858 static int fill_active_slot(void *unused)
859 {
860 struct transfer_request *request;
861
862 if (aborted || !is_running_queue)
863 return 0;
864
865 for (request = request_queue_head; request; request = request->next) {
866 if (request->state == NEED_FETCH) {
867 start_fetch_loose(request);
868 return 1;
869 } else if (pushing && request->state == NEED_PUSH) {
870 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
871 start_put(request);
872 } else {
873 start_mkcol(request);
874 }
875 return 1;
876 }
877 }
878 return 0;
879 }
880 #endif
881
882 static void get_remote_object_list(unsigned char parent);
883
884 static void add_fetch_request(struct object *obj)
885 {
886 struct transfer_request *request;
887
888 check_locks();
889
890 /*
891 * Don't fetch the object if it's known to exist locally
892 * or is already in the request queue
893 */
894 if (remote_dir_exists[obj->sha1[0]] == -1)
895 get_remote_object_list(obj->sha1[0]);
896 if (obj->flags & (LOCAL | FETCHING))
897 return;
898
899 obj->flags |= FETCHING;
900 request = xmalloc(sizeof(*request));
901 request->obj = obj;
902 request->url = NULL;
903 request->lock = NULL;
904 request->headers = NULL;
905 request->local_fileno = -1;
906 request->local_stream = NULL;
907 request->state = NEED_FETCH;
908 request->next = request_queue_head;
909 request_queue_head = request;
910
911 #ifdef USE_CURL_MULTI
912 fill_active_slots();
913 step_active_slots();
914 #endif
915 }
916
917 static int add_send_request(struct object *obj, struct remote_lock *lock)
918 {
919 struct transfer_request *request = request_queue_head;
920 struct packed_git *target;
921
922 /* Keep locks active */
923 check_locks();
924
925 /*
926 * Don't push the object if it's known to exist on the remote
927 * or is already in the request queue
928 */
929 if (remote_dir_exists[obj->sha1[0]] == -1)
930 get_remote_object_list(obj->sha1[0]);
931 if (obj->flags & (REMOTE | PUSHING))
932 return 0;
933 target = find_sha1_pack(obj->sha1, repo->packs);
934 if (target) {
935 obj->flags |= REMOTE;
936 return 0;
937 }
938
939 obj->flags |= PUSHING;
940 request = xmalloc(sizeof(*request));
941 request->obj = obj;
942 request->url = NULL;
943 request->lock = lock;
944 request->headers = NULL;
945 request->local_fileno = -1;
946 request->local_stream = NULL;
947 request->state = NEED_PUSH;
948 request->next = request_queue_head;
949 request_queue_head = request;
950
951 #ifdef USE_CURL_MULTI
952 fill_active_slots();
953 step_active_slots();
954 #endif
955
956 return 1;
957 }
958
959 static int fetch_index(unsigned char *sha1)
960 {
961 char *hex = sha1_to_hex(sha1);
962 char *filename;
963 char *url;
964 char tmpfile[PATH_MAX];
965 long prev_posn = 0;
966 char range[RANGE_HEADER_SIZE];
967 struct curl_slist *range_header = NULL;
968
969 FILE *indexfile;
970 struct active_request_slot *slot;
971 struct slot_results results;
972
973 /* Don't use the index if the pack isn't there */
974 url = xmalloc(strlen(repo->url) + 64);
975 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
976 slot = get_active_slot();
977 slot->results = &results;
978 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
979 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
980 if (start_active_slot(slot)) {
981 run_active_slot(slot);
982 if (results.curl_result != CURLE_OK) {
983 free(url);
984 return error("Unable to verify pack %s is available",
985 hex);
986 }
987 } else {
988 free(url);
989 return error("Unable to start request");
990 }
991
992 if (has_pack_index(sha1)) {
993 free(url);
994 return 0;
995 }
996
997 if (push_verbosely)
998 fprintf(stderr, "Getting index for pack %s\n", hex);
999
1000 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
1001
1002 filename = sha1_pack_index_name(sha1);
1003 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
1004 indexfile = fopen(tmpfile, "a");
1005 if (!indexfile) {
1006 free(url);
1007 return error("Unable to open local file %s for pack index",
1008 tmpfile);
1009 }
1010
1011 slot = get_active_slot();
1012 slot->results = &results;
1013 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1014 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1015 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
1016 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1017 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1018 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1019 slot->local = indexfile;
1020
1021 /*
1022 * If there is data present from a previous transfer attempt,
1023 * resume where it left off
1024 */
1025 prev_posn = ftell(indexfile);
1026 if (prev_posn>0) {
1027 if (push_verbosely)
1028 fprintf(stderr,
1029 "Resuming fetch of index for pack %s at byte %ld\n",
1030 hex, prev_posn);
1031 sprintf(range, "Range: bytes=%ld-", prev_posn);
1032 range_header = curl_slist_append(range_header, range);
1033 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
1034 }
1035
1036 if (start_active_slot(slot)) {
1037 run_active_slot(slot);
1038 if (results.curl_result != CURLE_OK) {
1039 free(url);
1040 fclose(indexfile);
1041 slot->local = NULL;
1042 return error("Unable to get pack index %s\n%s", url,
1043 curl_errorstr);
1044 }
1045 } else {
1046 free(url);
1047 fclose(indexfile);
1048 slot->local = NULL;
1049 return error("Unable to start request");
1050 }
1051
1052 free(url);
1053 fclose(indexfile);
1054 slot->local = NULL;
1055
1056 return move_temp_to_file(tmpfile, filename);
1057 }
1058
1059 static int setup_index(unsigned char *sha1)
1060 {
1061 struct packed_git *new_pack;
1062
1063 if (fetch_index(sha1))
1064 return -1;
1065
1066 new_pack = parse_pack_index(sha1);
1067 new_pack->next = repo->packs;
1068 repo->packs = new_pack;
1069 return 0;
1070 }
1071
1072 static int fetch_indices(void)
1073 {
1074 unsigned char sha1[20];
1075 char *url;
1076 struct strbuf buffer = STRBUF_INIT;
1077 char *data;
1078 int i = 0;
1079
1080 struct active_request_slot *slot;
1081 struct slot_results results;
1082
1083 if (push_verbosely)
1084 fprintf(stderr, "Getting pack list\n");
1085
1086 url = xmalloc(strlen(repo->url) + 20);
1087 sprintf(url, "%sobjects/info/packs", repo->url);
1088
1089 slot = get_active_slot();
1090 slot->results = &results;
1091 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1092 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1093 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1094 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1095 if (start_active_slot(slot)) {
1096 run_active_slot(slot);
1097 if (results.curl_result != CURLE_OK) {
1098 strbuf_release(&buffer);
1099 free(url);
1100 if (results.http_code == 404)
1101 return 0;
1102 else
1103 return error("%s", curl_errorstr);
1104 }
1105 } else {
1106 strbuf_release(&buffer);
1107 free(url);
1108 return error("Unable to start request");
1109 }
1110 free(url);
1111
1112 data = buffer.buf;
1113 while (i < buffer.len) {
1114 switch (data[i]) {
1115 case 'P':
1116 i++;
1117 if (i + 52 < buffer.len &&
1118 !prefixcmp(data + i, " pack-") &&
1119 !prefixcmp(data + i + 46, ".pack\n")) {
1120 get_sha1_hex(data + i + 6, sha1);
1121 setup_index(sha1);
1122 i += 51;
1123 break;
1124 }
1125 default:
1126 while (data[i] != '\n')
1127 i++;
1128 }
1129 i++;
1130 }
1131
1132 strbuf_release(&buffer);
1133 return 0;
1134 }
1135
1136 static void one_remote_object(const char *hex)
1137 {
1138 unsigned char sha1[20];
1139 struct object *obj;
1140
1141 if (get_sha1_hex(hex, sha1) != 0)
1142 return;
1143
1144 obj = lookup_object(sha1);
1145 if (!obj)
1146 obj = parse_object(sha1);
1147
1148 /* Ignore remote objects that don't exist locally */
1149 if (!obj)
1150 return;
1151
1152 obj->flags |= REMOTE;
1153 if (!object_list_contains(objects, obj))
1154 object_list_insert(obj, &objects);
1155 }
1156
1157 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1158 {
1159 int *lock_flags = (int *)ctx->userData;
1160
1161 if (tag_closed) {
1162 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1163 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1164 (*lock_flags & DAV_PROP_LOCKWR)) {
1165 *lock_flags |= DAV_LOCK_OK;
1166 }
1167 *lock_flags &= DAV_LOCK_OK;
1168 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1169 *lock_flags |= DAV_PROP_LOCKWR;
1170 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1171 *lock_flags |= DAV_PROP_LOCKEX;
1172 }
1173 }
1174 }
1175
1176 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1177 {
1178 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1179 git_SHA_CTX sha_ctx;
1180 unsigned char lock_token_sha1[20];
1181
1182 if (tag_closed && ctx->cdata) {
1183 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1184 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1185 strcpy(lock->owner, ctx->cdata);
1186 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1187 if (!prefixcmp(ctx->cdata, "Second-"))
1188 lock->timeout =
1189 strtol(ctx->cdata + 7, NULL, 10);
1190 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1191 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1192 strcpy(lock->token, ctx->cdata);
1193
1194 git_SHA1_Init(&sha_ctx);
1195 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1196 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1197
1198 lock->tmpfile_suffix[0] = '_';
1199 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1200 }
1201 }
1202 }
1203
1204 static void one_remote_ref(char *refname);
1205
1206 static void
1207 xml_start_tag(void *userData, const char *name, const char **atts)
1208 {
1209 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1210 const char *c = strchr(name, ':');
1211 int new_len;
1212
1213 if (c == NULL)
1214 c = name;
1215 else
1216 c++;
1217
1218 new_len = strlen(ctx->name) + strlen(c) + 2;
1219
1220 if (new_len > ctx->len) {
1221 ctx->name = xrealloc(ctx->name, new_len);
1222 ctx->len = new_len;
1223 }
1224 strcat(ctx->name, ".");
1225 strcat(ctx->name, c);
1226
1227 free(ctx->cdata);
1228 ctx->cdata = NULL;
1229
1230 ctx->userFunc(ctx, 0);
1231 }
1232
1233 static void
1234 xml_end_tag(void *userData, const char *name)
1235 {
1236 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1237 const char *c = strchr(name, ':');
1238 char *ep;
1239
1240 ctx->userFunc(ctx, 1);
1241
1242 if (c == NULL)
1243 c = name;
1244 else
1245 c++;
1246
1247 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1248 *ep = 0;
1249 }
1250
1251 static void
1252 xml_cdata(void *userData, const XML_Char *s, int len)
1253 {
1254 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1255 free(ctx->cdata);
1256 ctx->cdata = xmemdupz(s, len);
1257 }
1258
1259 static struct remote_lock *lock_remote(const char *path, long timeout)
1260 {
1261 struct active_request_slot *slot;
1262 struct slot_results results;
1263 struct buffer out_buffer = { STRBUF_INIT, 0 };
1264 struct strbuf in_buffer = STRBUF_INIT;
1265 char *url;
1266 char *ep;
1267 char timeout_header[25];
1268 struct remote_lock *lock = NULL;
1269 struct curl_slist *dav_headers = NULL;
1270 struct xml_ctx ctx;
1271 char *escaped;
1272
1273 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1274 sprintf(url, "%s%s", repo->url, path);
1275
1276 /* Make sure leading directories exist for the remote ref */
1277 ep = strchr(url + strlen(repo->url) + 1, '/');
1278 while (ep) {
1279 char saved_character = ep[1];
1280 ep[1] = '\0';
1281 slot = get_active_slot();
1282 slot->results = &results;
1283 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1284 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1285 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1286 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1287 if (start_active_slot(slot)) {
1288 run_active_slot(slot);
1289 if (results.curl_result != CURLE_OK &&
1290 results.http_code != 405) {
1291 fprintf(stderr,
1292 "Unable to create branch path %s\n",
1293 url);
1294 free(url);
1295 return NULL;
1296 }
1297 } else {
1298 fprintf(stderr, "Unable to start MKCOL request\n");
1299 free(url);
1300 return NULL;
1301 }
1302 ep[1] = saved_character;
1303 ep = strchr(ep + 1, '/');
1304 }
1305
1306 escaped = xml_entities(git_default_email);
1307 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
1308 free(escaped);
1309
1310 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1311 dav_headers = curl_slist_append(dav_headers, timeout_header);
1312 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1313
1314 slot = get_active_slot();
1315 slot->results = &results;
1316 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1317 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1318 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1319 #ifndef NO_CURL_IOCTL
1320 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1321 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1322 #endif
1323 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1324 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1325 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1326 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1327 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1328 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1329
1330 lock = xcalloc(1, sizeof(*lock));
1331 lock->timeout = -1;
1332
1333 if (start_active_slot(slot)) {
1334 run_active_slot(slot);
1335 if (results.curl_result == CURLE_OK) {
1336 XML_Parser parser = XML_ParserCreate(NULL);
1337 enum XML_Status result;
1338 ctx.name = xcalloc(10, 1);
1339 ctx.len = 0;
1340 ctx.cdata = NULL;
1341 ctx.userFunc = handle_new_lock_ctx;
1342 ctx.userData = lock;
1343 XML_SetUserData(parser, &ctx);
1344 XML_SetElementHandler(parser, xml_start_tag,
1345 xml_end_tag);
1346 XML_SetCharacterDataHandler(parser, xml_cdata);
1347 result = XML_Parse(parser, in_buffer.buf,
1348 in_buffer.len, 1);
1349 free(ctx.name);
1350 if (result != XML_STATUS_OK) {
1351 fprintf(stderr, "XML error: %s\n",
1352 XML_ErrorString(
1353 XML_GetErrorCode(parser)));
1354 lock->timeout = -1;
1355 }
1356 XML_ParserFree(parser);
1357 }
1358 } else {
1359 fprintf(stderr, "Unable to start LOCK request\n");
1360 }
1361
1362 curl_slist_free_all(dav_headers);
1363 strbuf_release(&out_buffer.buf);
1364 strbuf_release(&in_buffer);
1365
1366 if (lock->token == NULL || lock->timeout <= 0) {
1367 free(lock->token);
1368 free(lock->owner);
1369 free(url);
1370 free(lock);
1371 lock = NULL;
1372 } else {
1373 lock->url = url;
1374 lock->start_time = time(NULL);
1375 lock->next = repo->locks;
1376 repo->locks = lock;
1377 }
1378
1379 return lock;
1380 }
1381
1382 static int unlock_remote(struct remote_lock *lock)
1383 {
1384 struct active_request_slot *slot;
1385 struct slot_results results;
1386 struct remote_lock *prev = repo->locks;
1387 struct curl_slist *dav_headers;
1388 int rc = 0;
1389
1390 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1391
1392 slot = get_active_slot();
1393 slot->results = &results;
1394 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1395 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1396 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1397 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1398
1399 if (start_active_slot(slot)) {
1400 run_active_slot(slot);
1401 if (results.curl_result == CURLE_OK)
1402 rc = 1;
1403 else
1404 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1405 results.http_code);
1406 } else {
1407 fprintf(stderr, "Unable to start UNLOCK request\n");
1408 }
1409
1410 curl_slist_free_all(dav_headers);
1411
1412 if (repo->locks == lock) {
1413 repo->locks = lock->next;
1414 } else {
1415 while (prev && prev->next != lock)
1416 prev = prev->next;
1417 if (prev)
1418 prev->next = prev->next->next;
1419 }
1420
1421 free(lock->owner);
1422 free(lock->url);
1423 free(lock->token);
1424 free(lock);
1425
1426 return rc;
1427 }
1428
1429 static void remove_locks(void)
1430 {
1431 struct remote_lock *lock = repo->locks;
1432
1433 fprintf(stderr, "Removing remote locks...\n");
1434 while (lock) {
1435 unlock_remote(lock);
1436 lock = lock->next;
1437 }
1438 }
1439
1440 static void remove_locks_on_signal(int signo)
1441 {
1442 remove_locks();
1443 sigchain_pop(signo);
1444 raise(signo);
1445 }
1446
1447 static void remote_ls(const char *path, int flags,
1448 void (*userFunc)(struct remote_ls_ctx *ls),
1449 void *userData);
1450
1451 static void process_ls_object(struct remote_ls_ctx *ls)
1452 {
1453 unsigned int *parent = (unsigned int *)ls->userData;
1454 char *path = ls->dentry_name;
1455 char *obj_hex;
1456
1457 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1458 remote_dir_exists[*parent] = 1;
1459 return;
1460 }
1461
1462 if (strlen(path) != 49)
1463 return;
1464 path += 8;
1465 obj_hex = xmalloc(strlen(path));
1466 /* NB: path is not null-terminated, can not use strlcpy here */
1467 memcpy(obj_hex, path, 2);
1468 strcpy(obj_hex + 2, path + 3);
1469 one_remote_object(obj_hex);
1470 free(obj_hex);
1471 }
1472
1473 static void process_ls_ref(struct remote_ls_ctx *ls)
1474 {
1475 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1476 fprintf(stderr, " %s\n", ls->dentry_name);
1477 return;
1478 }
1479
1480 if (!(ls->dentry_flags & IS_DIR))
1481 one_remote_ref(ls->dentry_name);
1482 }
1483
1484 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1485 {
1486 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1487
1488 if (tag_closed) {
1489 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1490 if (ls->dentry_flags & IS_DIR) {
1491 if (ls->flags & PROCESS_DIRS) {
1492 ls->userFunc(ls);
1493 }
1494 if (strcmp(ls->dentry_name, ls->path) &&
1495 ls->flags & RECURSIVE) {
1496 remote_ls(ls->dentry_name,
1497 ls->flags,
1498 ls->userFunc,
1499 ls->userData);
1500 }
1501 } else if (ls->flags & PROCESS_FILES) {
1502 ls->userFunc(ls);
1503 }
1504 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1505 char *path = ctx->cdata;
1506 if (*ctx->cdata == 'h') {
1507 path = strstr(path, "//");
1508 if (path) {
1509 path = strchr(path+2, '/');
1510 }
1511 }
1512 if (path) {
1513 path += repo->path_len;
1514 ls->dentry_name = xstrdup(path);
1515 }
1516 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1517 ls->dentry_flags |= IS_DIR;
1518 }
1519 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1520 free(ls->dentry_name);
1521 ls->dentry_name = NULL;
1522 ls->dentry_flags = 0;
1523 }
1524 }
1525
1526 /*
1527 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1528 * should _only_ heed the information from that file, instead of trying to
1529 * determine the refs from the remote file system (badly: it does not even
1530 * know about packed-refs).
1531 */
1532 static void remote_ls(const char *path, int flags,
1533 void (*userFunc)(struct remote_ls_ctx *ls),
1534 void *userData)
1535 {
1536 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1537 struct active_request_slot *slot;
1538 struct slot_results results;
1539 struct strbuf in_buffer = STRBUF_INIT;
1540 struct buffer out_buffer = { STRBUF_INIT, 0 };
1541 struct curl_slist *dav_headers = NULL;
1542 struct xml_ctx ctx;
1543 struct remote_ls_ctx ls;
1544
1545 ls.flags = flags;
1546 ls.path = xstrdup(path);
1547 ls.dentry_name = NULL;
1548 ls.dentry_flags = 0;
1549 ls.userData = userData;
1550 ls.userFunc = userFunc;
1551
1552 sprintf(url, "%s%s", repo->url, path);
1553
1554 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1555
1556 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1557 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1558
1559 slot = get_active_slot();
1560 slot->results = &results;
1561 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1562 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1563 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1564 #ifndef NO_CURL_IOCTL
1565 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1566 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1567 #endif
1568 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1569 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1570 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1571 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1572 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1573 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1574
1575 if (start_active_slot(slot)) {
1576 run_active_slot(slot);
1577 if (results.curl_result == CURLE_OK) {
1578 XML_Parser parser = XML_ParserCreate(NULL);
1579 enum XML_Status result;
1580 ctx.name = xcalloc(10, 1);
1581 ctx.len = 0;
1582 ctx.cdata = NULL;
1583 ctx.userFunc = handle_remote_ls_ctx;
1584 ctx.userData = &ls;
1585 XML_SetUserData(parser, &ctx);
1586 XML_SetElementHandler(parser, xml_start_tag,
1587 xml_end_tag);
1588 XML_SetCharacterDataHandler(parser, xml_cdata);
1589 result = XML_Parse(parser, in_buffer.buf,
1590 in_buffer.len, 1);
1591 free(ctx.name);
1592
1593 if (result != XML_STATUS_OK) {
1594 fprintf(stderr, "XML error: %s\n",
1595 XML_ErrorString(
1596 XML_GetErrorCode(parser)));
1597 }
1598 XML_ParserFree(parser);
1599 }
1600 } else {
1601 fprintf(stderr, "Unable to start PROPFIND request\n");
1602 }
1603
1604 free(ls.path);
1605 free(url);
1606 strbuf_release(&out_buffer.buf);
1607 strbuf_release(&in_buffer);
1608 curl_slist_free_all(dav_headers);
1609 }
1610
1611 static void get_remote_object_list(unsigned char parent)
1612 {
1613 char path[] = "objects/XX/";
1614 static const char hex[] = "0123456789abcdef";
1615 unsigned int val = parent;
1616
1617 path[8] = hex[val >> 4];
1618 path[9] = hex[val & 0xf];
1619 remote_dir_exists[val] = 0;
1620 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1621 process_ls_object, &val);
1622 }
1623
1624 static int locking_available(void)
1625 {
1626 struct active_request_slot *slot;
1627 struct slot_results results;
1628 struct strbuf in_buffer = STRBUF_INIT;
1629 struct buffer out_buffer = { STRBUF_INIT, 0 };
1630 struct curl_slist *dav_headers = NULL;
1631 struct xml_ctx ctx;
1632 int lock_flags = 0;
1633 char *escaped;
1634
1635 escaped = xml_entities(repo->url);
1636 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1637 free(escaped);
1638
1639 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1640 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1641
1642 slot = get_active_slot();
1643 slot->results = &results;
1644 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1645 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1646 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1647 #ifndef NO_CURL_IOCTL
1648 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1649 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1650 #endif
1651 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1652 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1653 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1654 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1655 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1656 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1657
1658 if (start_active_slot(slot)) {
1659 run_active_slot(slot);
1660 if (results.curl_result == CURLE_OK) {
1661 XML_Parser parser = XML_ParserCreate(NULL);
1662 enum XML_Status result;
1663 ctx.name = xcalloc(10, 1);
1664 ctx.len = 0;
1665 ctx.cdata = NULL;
1666 ctx.userFunc = handle_lockprop_ctx;
1667 ctx.userData = &lock_flags;
1668 XML_SetUserData(parser, &ctx);
1669 XML_SetElementHandler(parser, xml_start_tag,
1670 xml_end_tag);
1671 result = XML_Parse(parser, in_buffer.buf,
1672 in_buffer.len, 1);
1673 free(ctx.name);
1674
1675 if (result != XML_STATUS_OK) {
1676 fprintf(stderr, "XML error: %s\n",
1677 XML_ErrorString(
1678 XML_GetErrorCode(parser)));
1679 lock_flags = 0;
1680 }
1681 XML_ParserFree(parser);
1682 if (!lock_flags)
1683 error("no DAV locking support on %s",
1684 repo->url);
1685
1686 } else {
1687 error("Cannot access URL %s, return code %d",
1688 repo->url, results.curl_result);
1689 lock_flags = 0;
1690 }
1691 } else {
1692 error("Unable to start PROPFIND request on %s", repo->url);
1693 }
1694
1695 strbuf_release(&out_buffer.buf);
1696 strbuf_release(&in_buffer);
1697 curl_slist_free_all(dav_headers);
1698
1699 return lock_flags;
1700 }
1701
1702 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1703 {
1704 struct object_list *entry = xmalloc(sizeof(struct object_list));
1705 entry->item = obj;
1706 entry->next = *p;
1707 *p = entry;
1708 return &entry->next;
1709 }
1710
1711 static struct object_list **process_blob(struct blob *blob,
1712 struct object_list **p,
1713 struct name_path *path,
1714 const char *name)
1715 {
1716 struct object *obj = &blob->object;
1717
1718 obj->flags |= LOCAL;
1719
1720 if (obj->flags & (UNINTERESTING | SEEN))
1721 return p;
1722
1723 obj->flags |= SEEN;
1724 return add_one_object(obj, p);
1725 }
1726
1727 static struct object_list **process_tree(struct tree *tree,
1728 struct object_list **p,
1729 struct name_path *path,
1730 const char *name)
1731 {
1732 struct object *obj = &tree->object;
1733 struct tree_desc desc;
1734 struct name_entry entry;
1735 struct name_path me;
1736
1737 obj->flags |= LOCAL;
1738
1739 if (obj->flags & (UNINTERESTING | SEEN))
1740 return p;
1741 if (parse_tree(tree) < 0)
1742 die("bad tree object %s", sha1_to_hex(obj->sha1));
1743
1744 obj->flags |= SEEN;
1745 name = xstrdup(name);
1746 p = add_one_object(obj, p);
1747 me.up = path;
1748 me.elem = name;
1749 me.elem_len = strlen(name);
1750
1751 init_tree_desc(&desc, tree->buffer, tree->size);
1752
1753 while (tree_entry(&desc, &entry))
1754 switch (object_type(entry.mode)) {
1755 case OBJ_TREE:
1756 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1757 break;
1758 case OBJ_BLOB:
1759 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1760 break;
1761 default:
1762 /* Subproject commit - not in this repository */
1763 break;
1764 }
1765
1766 free(tree->buffer);
1767 tree->buffer = NULL;
1768 return p;
1769 }
1770
1771 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1772 {
1773 int i;
1774 struct commit *commit;
1775 struct object_list **p = &objects;
1776 int count = 0;
1777
1778 while ((commit = get_revision(revs)) != NULL) {
1779 p = process_tree(commit->tree, p, NULL, "");
1780 commit->object.flags |= LOCAL;
1781 if (!(commit->object.flags & UNINTERESTING))
1782 count += add_send_request(&commit->object, lock);
1783 }
1784
1785 for (i = 0; i < revs->pending.nr; i++) {
1786 struct object_array_entry *entry = revs->pending.objects + i;
1787 struct object *obj = entry->item;
1788 const char *name = entry->name;
1789
1790 if (obj->flags & (UNINTERESTING | SEEN))
1791 continue;
1792 if (obj->type == OBJ_TAG) {
1793 obj->flags |= SEEN;
1794 p = add_one_object(obj, p);
1795 continue;
1796 }
1797 if (obj->type == OBJ_TREE) {
1798 p = process_tree((struct tree *)obj, p, NULL, name);
1799 continue;
1800 }
1801 if (obj->type == OBJ_BLOB) {
1802 p = process_blob((struct blob *)obj, p, NULL, name);
1803 continue;
1804 }
1805 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1806 }
1807
1808 while (objects) {
1809 if (!(objects->item->flags & UNINTERESTING))
1810 count += add_send_request(objects->item, lock);
1811 objects = objects->next;
1812 }
1813
1814 return count;
1815 }
1816
1817 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1818 {
1819 struct active_request_slot *slot;
1820 struct slot_results results;
1821 struct buffer out_buffer = { STRBUF_INIT, 0 };
1822 struct curl_slist *dav_headers;
1823
1824 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1825
1826 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1827
1828 slot = get_active_slot();
1829 slot->results = &results;
1830 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1831 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1832 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1833 #ifndef NO_CURL_IOCTL
1834 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1835 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1836 #endif
1837 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1838 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1839 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1840 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1841 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1842 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1843
1844 if (start_active_slot(slot)) {
1845 run_active_slot(slot);
1846 strbuf_release(&out_buffer.buf);
1847 if (results.curl_result != CURLE_OK) {
1848 fprintf(stderr,
1849 "PUT error: curl result=%d, HTTP code=%ld\n",
1850 results.curl_result, results.http_code);
1851 /* We should attempt recovery? */
1852 return 0;
1853 }
1854 } else {
1855 strbuf_release(&out_buffer.buf);
1856 fprintf(stderr, "Unable to start PUT request\n");
1857 return 0;
1858 }
1859
1860 return 1;
1861 }
1862
1863 static struct ref *remote_refs, **remote_tail;
1864
1865 static void one_remote_ref(char *refname)
1866 {
1867 struct ref *ref;
1868 struct object *obj;
1869
1870 ref = alloc_ref(refname);
1871
1872 if (http_fetch_ref(repo->url, ref) != 0) {
1873 fprintf(stderr,
1874 "Unable to fetch ref %s from %s\n",
1875 refname, repo->url);
1876 free(ref);
1877 return;
1878 }
1879
1880 /*
1881 * Fetch a copy of the object if it doesn't exist locally - it
1882 * may be required for updating server info later.
1883 */
1884 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1885 obj = lookup_unknown_object(ref->old_sha1);
1886 if (obj) {
1887 fprintf(stderr, " fetch %s for %s\n",
1888 sha1_to_hex(ref->old_sha1), refname);
1889 add_fetch_request(obj);
1890 }
1891 }
1892
1893 *remote_tail = ref;
1894 remote_tail = &ref->next;
1895 }
1896
1897 static void get_dav_remote_heads(void)
1898 {
1899 remote_tail = &remote_refs;
1900 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1901 }
1902
1903 static int is_zero_sha1(const unsigned char *sha1)
1904 {
1905 int i;
1906
1907 for (i = 0; i < 20; i++) {
1908 if (*sha1++)
1909 return 0;
1910 }
1911 return 1;
1912 }
1913
1914 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1915 {
1916 struct strbuf *buf = (struct strbuf *)ls->userData;
1917 struct object *o;
1918 int len;
1919 char *ref_info;
1920 struct ref *ref;
1921
1922 ref = alloc_ref(ls->dentry_name);
1923
1924 if (http_fetch_ref(repo->url, ref) != 0) {
1925 fprintf(stderr,
1926 "Unable to fetch ref %s from %s\n",
1927 ls->dentry_name, repo->url);
1928 aborted = 1;
1929 free(ref);
1930 return;
1931 }
1932
1933 o = parse_object(ref->old_sha1);
1934 if (!o) {
1935 fprintf(stderr,
1936 "Unable to parse object %s for remote ref %s\n",
1937 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1938 aborted = 1;
1939 free(ref);
1940 return;
1941 }
1942
1943 len = strlen(ls->dentry_name) + 42;
1944 ref_info = xcalloc(len + 1, 1);
1945 sprintf(ref_info, "%s %s\n",
1946 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1947 fwrite_buffer(ref_info, 1, len, buf);
1948 free(ref_info);
1949
1950 if (o->type == OBJ_TAG) {
1951 o = deref_tag(o, ls->dentry_name, 0);
1952 if (o) {
1953 len = strlen(ls->dentry_name) + 45;
1954 ref_info = xcalloc(len + 1, 1);
1955 sprintf(ref_info, "%s %s^{}\n",
1956 sha1_to_hex(o->sha1), ls->dentry_name);
1957 fwrite_buffer(ref_info, 1, len, buf);
1958 free(ref_info);
1959 }
1960 }
1961 free(ref);
1962 }
1963
1964 static void update_remote_info_refs(struct remote_lock *lock)
1965 {
1966 struct buffer buffer = { STRBUF_INIT, 0 };
1967 struct active_request_slot *slot;
1968 struct slot_results results;
1969 struct curl_slist *dav_headers;
1970
1971 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1972 add_remote_info_ref, &buffer.buf);
1973 if (!aborted) {
1974 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1975
1976 slot = get_active_slot();
1977 slot->results = &results;
1978 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1979 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1980 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1981 #ifndef NO_CURL_IOCTL
1982 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1983 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1984 #endif
1985 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1986 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1987 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1988 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1989 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1990 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1991
1992 if (start_active_slot(slot)) {
1993 run_active_slot(slot);
1994 if (results.curl_result != CURLE_OK) {
1995 fprintf(stderr,
1996 "PUT error: curl result=%d, HTTP code=%ld\n",
1997 results.curl_result, results.http_code);
1998 }
1999 }
2000 }
2001 strbuf_release(&buffer.buf);
2002 }
2003
2004 static int remote_exists(const char *path)
2005 {
2006 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2007 struct active_request_slot *slot;
2008 struct slot_results results;
2009 int ret = -1;
2010
2011 sprintf(url, "%s%s", repo->url, path);
2012
2013 slot = get_active_slot();
2014 slot->results = &results;
2015 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2016 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2017
2018 if (start_active_slot(slot)) {
2019 run_active_slot(slot);
2020 if (results.http_code == 404)
2021 ret = 0;
2022 else if (results.curl_result == CURLE_OK)
2023 ret = 1;
2024 else
2025 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2026 } else {
2027 fprintf(stderr, "Unable to start HEAD request\n");
2028 }
2029
2030 free(url);
2031 return ret;
2032 }
2033
2034 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2035 {
2036 char *url;
2037 struct strbuf buffer = STRBUF_INIT;
2038 struct active_request_slot *slot;
2039 struct slot_results results;
2040
2041 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2042 sprintf(url, "%s%s", repo->url, path);
2043
2044 slot = get_active_slot();
2045 slot->results = &results;
2046 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2047 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2048 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2049 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2050 if (start_active_slot(slot)) {
2051 run_active_slot(slot);
2052 if (results.curl_result != CURLE_OK) {
2053 die("Couldn't get %s for remote symref\n%s",
2054 url, curl_errorstr);
2055 }
2056 } else {
2057 die("Unable to start remote symref request");
2058 }
2059 free(url);
2060
2061 free(*symref);
2062 *symref = NULL;
2063 hashclr(sha1);
2064
2065 if (buffer.len == 0)
2066 return;
2067
2068 /* If it's a symref, set the refname; otherwise try for a sha1 */
2069 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2070 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2071 } else {
2072 get_sha1_hex(buffer.buf, sha1);
2073 }
2074
2075 strbuf_release(&buffer);
2076 }
2077
2078 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2079 {
2080 struct commit *head = lookup_commit(head_sha1);
2081 struct commit *branch = lookup_commit(branch_sha1);
2082 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2083
2084 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2085 }
2086
2087 static int delete_remote_branch(char *pattern, int force)
2088 {
2089 struct ref *refs = remote_refs;
2090 struct ref *remote_ref = NULL;
2091 unsigned char head_sha1[20];
2092 char *symref = NULL;
2093 int match;
2094 int patlen = strlen(pattern);
2095 int i;
2096 struct active_request_slot *slot;
2097 struct slot_results results;
2098 char *url;
2099
2100 /* Find the remote branch(es) matching the specified branch name */
2101 for (match = 0; refs; refs = refs->next) {
2102 char *name = refs->name;
2103 int namelen = strlen(name);
2104 if (namelen < patlen ||
2105 memcmp(name + namelen - patlen, pattern, patlen))
2106 continue;
2107 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2108 continue;
2109 match++;
2110 remote_ref = refs;
2111 }
2112 if (match == 0)
2113 return error("No remote branch matches %s", pattern);
2114 if (match != 1)
2115 return error("More than one remote branch matches %s",
2116 pattern);
2117
2118 /*
2119 * Remote HEAD must be a symref (not exactly foolproof; a remote
2120 * symlink to a symref will look like a symref)
2121 */
2122 fetch_symref("HEAD", &symref, head_sha1);
2123 if (!symref)
2124 return error("Remote HEAD is not a symref");
2125
2126 /* Remote branch must not be the remote HEAD */
2127 for (i=0; symref && i<MAXDEPTH; i++) {
2128 if (!strcmp(remote_ref->name, symref))
2129 return error("Remote branch %s is the current HEAD",
2130 remote_ref->name);
2131 fetch_symref(symref, &symref, head_sha1);
2132 }
2133
2134 /* Run extra sanity checks if delete is not forced */
2135 if (!force) {
2136 /* Remote HEAD must resolve to a known object */
2137 if (symref)
2138 return error("Remote HEAD symrefs too deep");
2139 if (is_zero_sha1(head_sha1))
2140 return error("Unable to resolve remote HEAD");
2141 if (!has_sha1_file(head_sha1))
2142 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2143
2144 /* Remote branch must resolve to a known object */
2145 if (is_zero_sha1(remote_ref->old_sha1))
2146 return error("Unable to resolve remote branch %s",
2147 remote_ref->name);
2148 if (!has_sha1_file(remote_ref->old_sha1))
2149 return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
2150
2151 /* Remote branch must be an ancestor of remote HEAD */
2152 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2153 return error("The branch '%s' is not an ancestor "
2154 "of your current HEAD.\n"
2155 "If you are sure you want to delete it,"
2156 " run:\n\t'git http-push -D %s %s'",
2157 remote_ref->name, repo->url, pattern);
2158 }
2159 }
2160
2161 /* Send delete request */
2162 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2163 if (dry_run)
2164 return 0;
2165 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2166 sprintf(url, "%s%s", repo->url, remote_ref->name);
2167 slot = get_active_slot();
2168 slot->results = &results;
2169 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2170 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2171 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2172 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2173 if (start_active_slot(slot)) {
2174 run_active_slot(slot);
2175 free(url);
2176 if (results.curl_result != CURLE_OK)
2177 return error("DELETE request failed (%d/%ld)\n",
2178 results.curl_result, results.http_code);
2179 } else {
2180 free(url);
2181 return error("Unable to start DELETE request");
2182 }
2183
2184 return 0;
2185 }
2186
2187 void run_request_queue(void)
2188 {
2189 #ifdef USE_CURL_MULTI
2190 is_running_queue = 1;
2191 fill_active_slots();
2192 add_fill_function(NULL, fill_active_slot);
2193 #endif
2194 do {
2195 finish_all_active_slots();
2196 #ifdef USE_CURL_MULTI
2197 fill_active_slots();
2198 #endif
2199 } while (request_queue_head && !aborted);
2200
2201 #ifdef USE_CURL_MULTI
2202 is_running_queue = 0;
2203 #endif
2204 }
2205
2206 int main(int argc, char **argv)
2207 {
2208 struct transfer_request *request;
2209 struct transfer_request *next_request;
2210 int nr_refspec = 0;
2211 char **refspec = NULL;
2212 struct remote_lock *ref_lock = NULL;
2213 struct remote_lock *info_ref_lock = NULL;
2214 struct rev_info revs;
2215 int delete_branch = 0;
2216 int force_delete = 0;
2217 int objects_to_send;
2218 int rc = 0;
2219 int i;
2220 int new_refs;
2221 struct ref *ref, *local_refs;
2222 struct remote *remote;
2223 char *rewritten_url = NULL;
2224
2225 git_extract_argv0_path(argv[0]);
2226
2227 setup_git_directory();
2228
2229 repo = xcalloc(sizeof(*repo), 1);
2230
2231 argv++;
2232 for (i = 1; i < argc; i++, argv++) {
2233 char *arg = *argv;
2234
2235 if (*arg == '-') {
2236 if (!strcmp(arg, "--all")) {
2237 push_all = MATCH_REFS_ALL;
2238 continue;
2239 }
2240 if (!strcmp(arg, "--force")) {
2241 force_all = 1;
2242 continue;
2243 }
2244 if (!strcmp(arg, "--dry-run")) {
2245 dry_run = 1;
2246 continue;
2247 }
2248 if (!strcmp(arg, "--verbose")) {
2249 push_verbosely = 1;
2250 continue;
2251 }
2252 if (!strcmp(arg, "-d")) {
2253 delete_branch = 1;
2254 continue;
2255 }
2256 if (!strcmp(arg, "-D")) {
2257 delete_branch = 1;
2258 force_delete = 1;
2259 continue;
2260 }
2261 }
2262 if (!repo->url) {
2263 char *path = strstr(arg, "//");
2264 repo->url = arg;
2265 repo->path_len = strlen(arg);
2266 if (path) {
2267 repo->path = strchr(path+2, '/');
2268 if (repo->path)
2269 repo->path_len = strlen(repo->path);
2270 }
2271 continue;
2272 }
2273 refspec = argv;
2274 nr_refspec = argc - i;
2275 break;
2276 }
2277
2278 #ifndef USE_CURL_MULTI
2279 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2280 #endif
2281
2282 if (!repo->url)
2283 usage(http_push_usage);
2284
2285 if (delete_branch && nr_refspec != 1)
2286 die("You must specify only one branch name when deleting a remote branch");
2287
2288 memset(remote_dir_exists, -1, 256);
2289
2290 /*
2291 * Create a minimum remote by hand to give to http_init(),
2292 * primarily to allow it to look at the URL.
2293 */
2294 remote = xcalloc(sizeof(*remote), 1);
2295 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2296 remote->url[remote->url_nr++] = repo->url;
2297 http_init(remote);
2298
2299 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2300
2301 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2302 rewritten_url = xmalloc(strlen(repo->url)+2);
2303 strcpy(rewritten_url, repo->url);
2304 strcat(rewritten_url, "/");
2305 repo->path = rewritten_url + (repo->path - repo->url);
2306 repo->path_len++;
2307 repo->url = rewritten_url;
2308 }
2309
2310 #ifdef USE_CURL_MULTI
2311 is_running_queue = 0;
2312 #endif
2313
2314 /* Verify DAV compliance/lock support */
2315 if (!locking_available()) {
2316 rc = 1;
2317 goto cleanup;
2318 }
2319
2320 sigchain_push_common(remove_locks_on_signal);
2321
2322 /* Check whether the remote has server info files */
2323 repo->can_update_info_refs = 0;
2324 repo->has_info_refs = remote_exists("info/refs");
2325 repo->has_info_packs = remote_exists("objects/info/packs");
2326 if (repo->has_info_refs) {
2327 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2328 if (info_ref_lock)
2329 repo->can_update_info_refs = 1;
2330 else {
2331 error("cannot lock existing info/refs");
2332 rc = 1;
2333 goto cleanup;
2334 }
2335 }
2336 if (repo->has_info_packs)
2337 fetch_indices();
2338
2339 /* Get a list of all local and remote heads to validate refspecs */
2340 local_refs = get_local_heads();
2341 fprintf(stderr, "Fetching remote heads...\n");
2342 get_dav_remote_heads();
2343 run_request_queue();
2344
2345 /* Remove a remote branch if -d or -D was specified */
2346 if (delete_branch) {
2347 if (delete_remote_branch(refspec[0], force_delete) == -1)
2348 fprintf(stderr, "Unable to delete remote branch %s\n",
2349 refspec[0]);
2350 goto cleanup;
2351 }
2352
2353 /* match them up */
2354 if (!remote_tail)
2355 remote_tail = &remote_refs;
2356 if (match_refs(local_refs, remote_refs, &remote_tail,
2357 nr_refspec, (const char **) refspec, push_all)) {
2358 rc = -1;
2359 goto cleanup;
2360 }
2361 if (!remote_refs) {
2362 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2363 rc = 0;
2364 goto cleanup;
2365 }
2366
2367 new_refs = 0;
2368 for (ref = remote_refs; ref; ref = ref->next) {
2369 char old_hex[60], *new_hex;
2370 const char *commit_argv[4];
2371 int commit_argc;
2372 char *new_sha1_hex, *old_sha1_hex;
2373
2374 if (!ref->peer_ref)
2375 continue;
2376
2377 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2378 if (delete_remote_branch(ref->name, 1) == -1) {
2379 error("Could not remove %s", ref->name);
2380 rc = -4;
2381 }
2382 new_refs++;
2383 continue;
2384 }
2385
2386 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2387 if (push_verbosely || 1)
2388 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2389 continue;
2390 }
2391
2392 if (!force_all &&
2393 !is_zero_sha1(ref->old_sha1) &&
2394 !ref->force) {
2395 if (!has_sha1_file(ref->old_sha1) ||
2396 !ref_newer(ref->peer_ref->new_sha1,
2397 ref->old_sha1)) {
2398 /*
2399 * We do not have the remote ref, or
2400 * we know that the remote ref is not
2401 * an ancestor of what we are trying to
2402 * push. Either way this can be losing
2403 * commits at the remote end and likely
2404 * we were not up to date to begin with.
2405 */
2406 error("remote '%s' is not an ancestor of\n"
2407 "local '%s'.\n"
2408 "Maybe you are not up-to-date and "
2409 "need to pull first?",
2410 ref->name,
2411 ref->peer_ref->name);
2412 rc = -2;
2413 continue;
2414 }
2415 }
2416 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2417 new_refs++;
2418 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2419 new_hex = sha1_to_hex(ref->new_sha1);
2420
2421 fprintf(stderr, "updating '%s'", ref->name);
2422 if (strcmp(ref->name, ref->peer_ref->name))
2423 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2424 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2425 if (dry_run)
2426 continue;
2427
2428 /* Lock remote branch ref */
2429 ref_lock = lock_remote(ref->name, LOCK_TIME);
2430 if (ref_lock == NULL) {
2431 fprintf(stderr, "Unable to lock remote branch %s\n",
2432 ref->name);
2433 rc = 1;
2434 continue;
2435 }
2436
2437 /* Set up revision info for this refspec */
2438 commit_argc = 3;
2439 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2440 old_sha1_hex = NULL;
2441 commit_argv[1] = "--objects";
2442 commit_argv[2] = new_sha1_hex;
2443 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2444 old_sha1_hex = xmalloc(42);
2445 sprintf(old_sha1_hex, "^%s",
2446 sha1_to_hex(ref->old_sha1));
2447 commit_argv[3] = old_sha1_hex;
2448 commit_argc++;
2449 }
2450 init_revisions(&revs, setup_git_directory());
2451 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2452 revs.edge_hint = 0; /* just in case */
2453 free(new_sha1_hex);
2454 if (old_sha1_hex) {
2455 free(old_sha1_hex);
2456 commit_argv[1] = NULL;
2457 }
2458
2459 /* Generate a list of objects that need to be pushed */
2460 pushing = 0;
2461 if (prepare_revision_walk(&revs))
2462 die("revision walk setup failed");
2463 mark_edges_uninteresting(revs.commits, &revs, NULL);
2464 objects_to_send = get_delta(&revs, ref_lock);
2465 finish_all_active_slots();
2466
2467 /* Push missing objects to remote, this would be a
2468 convenient time to pack them first if appropriate. */
2469 pushing = 1;
2470 if (objects_to_send)
2471 fprintf(stderr, " sending %d objects\n",
2472 objects_to_send);
2473
2474 run_request_queue();
2475
2476 /* Update the remote branch if all went well */
2477 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2478 rc = 1;
2479
2480 if (!rc)
2481 fprintf(stderr, " done\n");
2482 unlock_remote(ref_lock);
2483 check_locks();
2484 }
2485
2486 /* Update remote server info if appropriate */
2487 if (repo->has_info_refs && new_refs) {
2488 if (info_ref_lock && repo->can_update_info_refs) {
2489 fprintf(stderr, "Updating remote server info\n");
2490 if (!dry_run)
2491 update_remote_info_refs(info_ref_lock);
2492 } else {
2493 fprintf(stderr, "Unable to update server info\n");
2494 }
2495 }
2496
2497 cleanup:
2498 free(rewritten_url);
2499 if (info_ref_lock)
2500 unlock_remote(info_ref_lock);
2501 free(repo);
2502
2503 curl_slist_free_all(no_pragma_header);
2504
2505 http_cleanup();
2506
2507 request = request_queue_head;
2508 while (request != NULL) {
2509 next_request = request->next;
2510 release_request(request);
2511 request = next_request;
2512 }
2513
2514 return rc;
2515 }
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