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http-push: do not SEGV after fetching a bad pack idx file
[git/jrn.git] / http-push.c
blob281e153eb3655d0aa2b94d62a292672ae6ef768e
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 int ret = 0;
962 char *hex = xstrdup(sha1_to_hex(sha1));
963 char *filename;
964 char *url;
965 char tmpfile[PATH_MAX];
966 long prev_posn = 0;
967 char range[RANGE_HEADER_SIZE];
968 struct curl_slist *range_header = NULL;
969
970 FILE *indexfile;
971 struct active_request_slot *slot;
972 struct slot_results results;
973
974 /* Don't use the index if the pack isn't there */
975 url = xmalloc(strlen(repo->url) + 64);
976 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
977 slot = get_active_slot();
978 slot->results = &results;
979 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
980 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
981 if (start_active_slot(slot)) {
982 run_active_slot(slot);
983 if (results.curl_result != CURLE_OK) {
984 ret = error("Unable to verify pack %s is available",
985 hex);
986 goto cleanup_pack;
987 }
988 } else {
989 ret = error("Unable to start request");
990 goto cleanup_pack;
991 }
992
993 if (has_pack_index(sha1)) {
994 ret = 0;
995 goto cleanup_pack;
996 }
997
998 if (push_verbosely)
999 fprintf(stderr, "Getting index for pack %s\n", hex);
1000
1001 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
1002
1003 filename = sha1_pack_index_name(sha1);
1004 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
1005 indexfile = fopen(tmpfile, "a");
1006 if (!indexfile) {
1007 ret = error("Unable to open local file %s for pack index",
1008 tmpfile);
1009 goto cleanup_pack;
1010 }
1011
1012 slot = get_active_slot();
1013 slot->results = &results;
1014 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1015 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1016 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
1017 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1018 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1019 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1020 slot->local = indexfile;
1021
1022 /*
1023 * If there is data present from a previous transfer attempt,
1024 * resume where it left off
1025 */
1026 prev_posn = ftell(indexfile);
1027 if (prev_posn>0) {
1028 if (push_verbosely)
1029 fprintf(stderr,
1030 "Resuming fetch of index for pack %s at byte %ld\n",
1031 hex, prev_posn);
1032 sprintf(range, "Range: bytes=%ld-", prev_posn);
1033 range_header = curl_slist_append(range_header, range);
1034 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
1035 }
1036
1037 if (start_active_slot(slot)) {
1038 run_active_slot(slot);
1039 if (results.curl_result != CURLE_OK) {
1040 ret = error("Unable to get pack index %s\n%s", url,
1041 curl_errorstr);
1042 goto cleanup_index;
1043 }
1044 } else {
1045 ret = error("Unable to start request");
1046 goto cleanup_index;
1047 }
1048
1049 ret = move_temp_to_file(tmpfile, filename);
1050
1051 cleanup_index:
1052 fclose(indexfile);
1053 slot->local = NULL;
1054 cleanup_pack:
1055 free(url);
1056 free(hex);
1057 return ret;
1058 }
1059
1060 static int setup_index(unsigned char *sha1)
1061 {
1062 struct packed_git *new_pack;
1063
1064 if (fetch_index(sha1))
1065 return -1;
1066
1067 new_pack = parse_pack_index(sha1);
1068 if (!new_pack)
1069 return -1; /* parse_pack_index() already issued error message */
1070 new_pack->next = repo->packs;
1071 repo->packs = new_pack;
1072 return 0;
1073 }
1074
1075 static int fetch_indices(void)
1076 {
1077 unsigned char sha1[20];
1078 char *url;
1079 struct strbuf buffer = STRBUF_INIT;
1080 char *data;
1081 int i = 0;
1082
1083 struct active_request_slot *slot;
1084 struct slot_results results;
1085
1086 if (push_verbosely)
1087 fprintf(stderr, "Getting pack list\n");
1088
1089 url = xmalloc(strlen(repo->url) + 20);
1090 sprintf(url, "%sobjects/info/packs", repo->url);
1091
1092 slot = get_active_slot();
1093 slot->results = &results;
1094 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1095 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1096 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1097 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1098 if (start_active_slot(slot)) {
1099 run_active_slot(slot);
1100 if (results.curl_result != CURLE_OK) {
1101 strbuf_release(&buffer);
1102 free(url);
1103 if (results.http_code == 404)
1104 return 0;
1105 else
1106 return error("%s", curl_errorstr);
1107 }
1108 } else {
1109 strbuf_release(&buffer);
1110 free(url);
1111 return error("Unable to start request");
1112 }
1113 free(url);
1114
1115 data = buffer.buf;
1116 while (i < buffer.len) {
1117 switch (data[i]) {
1118 case 'P':
1119 i++;
1120 if (i + 52 < buffer.len &&
1121 !prefixcmp(data + i, " pack-") &&
1122 !prefixcmp(data + i + 46, ".pack\n")) {
1123 get_sha1_hex(data + i + 6, sha1);
1124 setup_index(sha1);
1125 i += 51;
1126 break;
1127 }
1128 default:
1129 while (data[i] != '\n')
1130 i++;
1131 }
1132 i++;
1133 }
1134
1135 strbuf_release(&buffer);
1136 return 0;
1137 }
1138
1139 static void one_remote_object(const char *hex)
1140 {
1141 unsigned char sha1[20];
1142 struct object *obj;
1143
1144 if (get_sha1_hex(hex, sha1) != 0)
1145 return;
1146
1147 obj = lookup_object(sha1);
1148 if (!obj)
1149 obj = parse_object(sha1);
1150
1151 /* Ignore remote objects that don't exist locally */
1152 if (!obj)
1153 return;
1154
1155 obj->flags |= REMOTE;
1156 if (!object_list_contains(objects, obj))
1157 object_list_insert(obj, &objects);
1158 }
1159
1160 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1161 {
1162 int *lock_flags = (int *)ctx->userData;
1163
1164 if (tag_closed) {
1165 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1166 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1167 (*lock_flags & DAV_PROP_LOCKWR)) {
1168 *lock_flags |= DAV_LOCK_OK;
1169 }
1170 *lock_flags &= DAV_LOCK_OK;
1171 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1172 *lock_flags |= DAV_PROP_LOCKWR;
1173 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1174 *lock_flags |= DAV_PROP_LOCKEX;
1175 }
1176 }
1177 }
1178
1179 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1180 {
1181 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1182 git_SHA_CTX sha_ctx;
1183 unsigned char lock_token_sha1[20];
1184
1185 if (tag_closed && ctx->cdata) {
1186 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1187 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1188 strcpy(lock->owner, ctx->cdata);
1189 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1190 if (!prefixcmp(ctx->cdata, "Second-"))
1191 lock->timeout =
1192 strtol(ctx->cdata + 7, NULL, 10);
1193 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1194 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1195 strcpy(lock->token, ctx->cdata);
1196
1197 git_SHA1_Init(&sha_ctx);
1198 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1199 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1200
1201 lock->tmpfile_suffix[0] = '_';
1202 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1203 }
1204 }
1205 }
1206
1207 static void one_remote_ref(char *refname);
1208
1209 static void
1210 xml_start_tag(void *userData, const char *name, const char **atts)
1211 {
1212 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1213 const char *c = strchr(name, ':');
1214 int new_len;
1215
1216 if (c == NULL)
1217 c = name;
1218 else
1219 c++;
1220
1221 new_len = strlen(ctx->name) + strlen(c) + 2;
1222
1223 if (new_len > ctx->len) {
1224 ctx->name = xrealloc(ctx->name, new_len);
1225 ctx->len = new_len;
1226 }
1227 strcat(ctx->name, ".");
1228 strcat(ctx->name, c);
1229
1230 free(ctx->cdata);
1231 ctx->cdata = NULL;
1232
1233 ctx->userFunc(ctx, 0);
1234 }
1235
1236 static void
1237 xml_end_tag(void *userData, const char *name)
1238 {
1239 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1240 const char *c = strchr(name, ':');
1241 char *ep;
1242
1243 ctx->userFunc(ctx, 1);
1244
1245 if (c == NULL)
1246 c = name;
1247 else
1248 c++;
1249
1250 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1251 *ep = 0;
1252 }
1253
1254 static void
1255 xml_cdata(void *userData, const XML_Char *s, int len)
1256 {
1257 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1258 free(ctx->cdata);
1259 ctx->cdata = xmemdupz(s, len);
1260 }
1261
1262 static struct remote_lock *lock_remote(const char *path, long timeout)
1263 {
1264 struct active_request_slot *slot;
1265 struct slot_results results;
1266 struct buffer out_buffer = { STRBUF_INIT, 0 };
1267 struct strbuf in_buffer = STRBUF_INIT;
1268 char *url;
1269 char *ep;
1270 char timeout_header[25];
1271 struct remote_lock *lock = NULL;
1272 struct curl_slist *dav_headers = NULL;
1273 struct xml_ctx ctx;
1274 char *escaped;
1275
1276 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1277 sprintf(url, "%s%s", repo->url, path);
1278
1279 /* Make sure leading directories exist for the remote ref */
1280 ep = strchr(url + strlen(repo->url) + 1, '/');
1281 while (ep) {
1282 char saved_character = ep[1];
1283 ep[1] = '\0';
1284 slot = get_active_slot();
1285 slot->results = &results;
1286 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1287 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1288 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1289 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1290 if (start_active_slot(slot)) {
1291 run_active_slot(slot);
1292 if (results.curl_result != CURLE_OK &&
1293 results.http_code != 405) {
1294 fprintf(stderr,
1295 "Unable to create branch path %s\n",
1296 url);
1297 free(url);
1298 return NULL;
1299 }
1300 } else {
1301 fprintf(stderr, "Unable to start MKCOL request\n");
1302 free(url);
1303 return NULL;
1304 }
1305 ep[1] = saved_character;
1306 ep = strchr(ep + 1, '/');
1307 }
1308
1309 escaped = xml_entities(git_default_email);
1310 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
1311 free(escaped);
1312
1313 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1314 dav_headers = curl_slist_append(dav_headers, timeout_header);
1315 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1316
1317 slot = get_active_slot();
1318 slot->results = &results;
1319 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1320 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1321 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1322 #ifndef NO_CURL_IOCTL
1323 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1324 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1325 #endif
1326 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1327 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1329 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1330 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1331 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1332
1333 lock = xcalloc(1, sizeof(*lock));
1334 lock->timeout = -1;
1335
1336 if (start_active_slot(slot)) {
1337 run_active_slot(slot);
1338 if (results.curl_result == CURLE_OK) {
1339 XML_Parser parser = XML_ParserCreate(NULL);
1340 enum XML_Status result;
1341 ctx.name = xcalloc(10, 1);
1342 ctx.len = 0;
1343 ctx.cdata = NULL;
1344 ctx.userFunc = handle_new_lock_ctx;
1345 ctx.userData = lock;
1346 XML_SetUserData(parser, &ctx);
1347 XML_SetElementHandler(parser, xml_start_tag,
1348 xml_end_tag);
1349 XML_SetCharacterDataHandler(parser, xml_cdata);
1350 result = XML_Parse(parser, in_buffer.buf,
1351 in_buffer.len, 1);
1352 free(ctx.name);
1353 if (result != XML_STATUS_OK) {
1354 fprintf(stderr, "XML error: %s\n",
1355 XML_ErrorString(
1356 XML_GetErrorCode(parser)));
1357 lock->timeout = -1;
1358 }
1359 XML_ParserFree(parser);
1360 }
1361 } else {
1362 fprintf(stderr, "Unable to start LOCK request\n");
1363 }
1364
1365 curl_slist_free_all(dav_headers);
1366 strbuf_release(&out_buffer.buf);
1367 strbuf_release(&in_buffer);
1368
1369 if (lock->token == NULL || lock->timeout <= 0) {
1370 free(lock->token);
1371 free(lock->owner);
1372 free(url);
1373 free(lock);
1374 lock = NULL;
1375 } else {
1376 lock->url = url;
1377 lock->start_time = time(NULL);
1378 lock->next = repo->locks;
1379 repo->locks = lock;
1380 }
1381
1382 return lock;
1383 }
1384
1385 static int unlock_remote(struct remote_lock *lock)
1386 {
1387 struct active_request_slot *slot;
1388 struct slot_results results;
1389 struct remote_lock *prev = repo->locks;
1390 struct curl_slist *dav_headers;
1391 int rc = 0;
1392
1393 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1394
1395 slot = get_active_slot();
1396 slot->results = &results;
1397 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1398 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1399 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1400 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1401
1402 if (start_active_slot(slot)) {
1403 run_active_slot(slot);
1404 if (results.curl_result == CURLE_OK)
1405 rc = 1;
1406 else
1407 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1408 results.http_code);
1409 } else {
1410 fprintf(stderr, "Unable to start UNLOCK request\n");
1411 }
1412
1413 curl_slist_free_all(dav_headers);
1414
1415 if (repo->locks == lock) {
1416 repo->locks = lock->next;
1417 } else {
1418 while (prev && prev->next != lock)
1419 prev = prev->next;
1420 if (prev)
1421 prev->next = prev->next->next;
1422 }
1423
1424 free(lock->owner);
1425 free(lock->url);
1426 free(lock->token);
1427 free(lock);
1428
1429 return rc;
1430 }
1431
1432 static void remove_locks(void)
1433 {
1434 struct remote_lock *lock = repo->locks;
1435
1436 fprintf(stderr, "Removing remote locks...\n");
1437 while (lock) {
1438 unlock_remote(lock);
1439 lock = lock->next;
1440 }
1441 }
1442
1443 static void remove_locks_on_signal(int signo)
1444 {
1445 remove_locks();
1446 sigchain_pop(signo);
1447 raise(signo);
1448 }
1449
1450 static void remote_ls(const char *path, int flags,
1451 void (*userFunc)(struct remote_ls_ctx *ls),
1452 void *userData);
1453
1454 static void process_ls_object(struct remote_ls_ctx *ls)
1455 {
1456 unsigned int *parent = (unsigned int *)ls->userData;
1457 char *path = ls->dentry_name;
1458 char *obj_hex;
1459
1460 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1461 remote_dir_exists[*parent] = 1;
1462 return;
1463 }
1464
1465 if (strlen(path) != 49)
1466 return;
1467 path += 8;
1468 obj_hex = xmalloc(strlen(path));
1469 /* NB: path is not null-terminated, can not use strlcpy here */
1470 memcpy(obj_hex, path, 2);
1471 strcpy(obj_hex + 2, path + 3);
1472 one_remote_object(obj_hex);
1473 free(obj_hex);
1474 }
1475
1476 static void process_ls_ref(struct remote_ls_ctx *ls)
1477 {
1478 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1479 fprintf(stderr, " %s\n", ls->dentry_name);
1480 return;
1481 }
1482
1483 if (!(ls->dentry_flags & IS_DIR))
1484 one_remote_ref(ls->dentry_name);
1485 }
1486
1487 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1488 {
1489 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1490
1491 if (tag_closed) {
1492 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1493 if (ls->dentry_flags & IS_DIR) {
1494 if (ls->flags & PROCESS_DIRS) {
1495 ls->userFunc(ls);
1496 }
1497 if (strcmp(ls->dentry_name, ls->path) &&
1498 ls->flags & RECURSIVE) {
1499 remote_ls(ls->dentry_name,
1500 ls->flags,
1501 ls->userFunc,
1502 ls->userData);
1503 }
1504 } else if (ls->flags & PROCESS_FILES) {
1505 ls->userFunc(ls);
1506 }
1507 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1508 char *path = ctx->cdata;
1509 if (*ctx->cdata == 'h') {
1510 path = strstr(path, "//");
1511 if (path) {
1512 path = strchr(path+2, '/');
1513 }
1514 }
1515 if (path) {
1516 path += repo->path_len;
1517 ls->dentry_name = xstrdup(path);
1518 }
1519 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1520 ls->dentry_flags |= IS_DIR;
1521 }
1522 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1523 free(ls->dentry_name);
1524 ls->dentry_name = NULL;
1525 ls->dentry_flags = 0;
1526 }
1527 }
1528
1529 /*
1530 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1531 * should _only_ heed the information from that file, instead of trying to
1532 * determine the refs from the remote file system (badly: it does not even
1533 * know about packed-refs).
1534 */
1535 static void remote_ls(const char *path, int flags,
1536 void (*userFunc)(struct remote_ls_ctx *ls),
1537 void *userData)
1538 {
1539 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1540 struct active_request_slot *slot;
1541 struct slot_results results;
1542 struct strbuf in_buffer = STRBUF_INIT;
1543 struct buffer out_buffer = { STRBUF_INIT, 0 };
1544 struct curl_slist *dav_headers = NULL;
1545 struct xml_ctx ctx;
1546 struct remote_ls_ctx ls;
1547
1548 ls.flags = flags;
1549 ls.path = xstrdup(path);
1550 ls.dentry_name = NULL;
1551 ls.dentry_flags = 0;
1552 ls.userData = userData;
1553 ls.userFunc = userFunc;
1554
1555 sprintf(url, "%s%s", repo->url, path);
1556
1557 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1558
1559 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1560 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1561
1562 slot = get_active_slot();
1563 slot->results = &results;
1564 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1565 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1566 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1567 #ifndef NO_CURL_IOCTL
1568 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1569 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1570 #endif
1571 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1573 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1574 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1575 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1576 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1577
1578 if (start_active_slot(slot)) {
1579 run_active_slot(slot);
1580 if (results.curl_result == CURLE_OK) {
1581 XML_Parser parser = XML_ParserCreate(NULL);
1582 enum XML_Status result;
1583 ctx.name = xcalloc(10, 1);
1584 ctx.len = 0;
1585 ctx.cdata = NULL;
1586 ctx.userFunc = handle_remote_ls_ctx;
1587 ctx.userData = &ls;
1588 XML_SetUserData(parser, &ctx);
1589 XML_SetElementHandler(parser, xml_start_tag,
1590 xml_end_tag);
1591 XML_SetCharacterDataHandler(parser, xml_cdata);
1592 result = XML_Parse(parser, in_buffer.buf,
1593 in_buffer.len, 1);
1594 free(ctx.name);
1595
1596 if (result != XML_STATUS_OK) {
1597 fprintf(stderr, "XML error: %s\n",
1598 XML_ErrorString(
1599 XML_GetErrorCode(parser)));
1600 }
1601 XML_ParserFree(parser);
1602 }
1603 } else {
1604 fprintf(stderr, "Unable to start PROPFIND request\n");
1605 }
1606
1607 free(ls.path);
1608 free(url);
1609 strbuf_release(&out_buffer.buf);
1610 strbuf_release(&in_buffer);
1611 curl_slist_free_all(dav_headers);
1612 }
1613
1614 static void get_remote_object_list(unsigned char parent)
1615 {
1616 char path[] = "objects/XX/";
1617 static const char hex[] = "0123456789abcdef";
1618 unsigned int val = parent;
1619
1620 path[8] = hex[val >> 4];
1621 path[9] = hex[val & 0xf];
1622 remote_dir_exists[val] = 0;
1623 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1624 process_ls_object, &val);
1625 }
1626
1627 static int locking_available(void)
1628 {
1629 struct active_request_slot *slot;
1630 struct slot_results results;
1631 struct strbuf in_buffer = STRBUF_INIT;
1632 struct buffer out_buffer = { STRBUF_INIT, 0 };
1633 struct curl_slist *dav_headers = NULL;
1634 struct xml_ctx ctx;
1635 int lock_flags = 0;
1636 char *escaped;
1637
1638 escaped = xml_entities(repo->url);
1639 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1640 free(escaped);
1641
1642 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1643 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1644
1645 slot = get_active_slot();
1646 slot->results = &results;
1647 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1648 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1649 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1650 #ifndef NO_CURL_IOCTL
1651 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1652 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1653 #endif
1654 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1655 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1656 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1657 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1658 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1659 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1660
1661 if (start_active_slot(slot)) {
1662 run_active_slot(slot);
1663 if (results.curl_result == CURLE_OK) {
1664 XML_Parser parser = XML_ParserCreate(NULL);
1665 enum XML_Status result;
1666 ctx.name = xcalloc(10, 1);
1667 ctx.len = 0;
1668 ctx.cdata = NULL;
1669 ctx.userFunc = handle_lockprop_ctx;
1670 ctx.userData = &lock_flags;
1671 XML_SetUserData(parser, &ctx);
1672 XML_SetElementHandler(parser, xml_start_tag,
1673 xml_end_tag);
1674 result = XML_Parse(parser, in_buffer.buf,
1675 in_buffer.len, 1);
1676 free(ctx.name);
1677
1678 if (result != XML_STATUS_OK) {
1679 fprintf(stderr, "XML error: %s\n",
1680 XML_ErrorString(
1681 XML_GetErrorCode(parser)));
1682 lock_flags = 0;
1683 }
1684 XML_ParserFree(parser);
1685 if (!lock_flags)
1686 error("no DAV locking support on %s",
1687 repo->url);
1688
1689 } else {
1690 error("Cannot access URL %s, return code %d",
1691 repo->url, results.curl_result);
1692 lock_flags = 0;
1693 }
1694 } else {
1695 error("Unable to start PROPFIND request on %s", repo->url);
1696 }
1697
1698 strbuf_release(&out_buffer.buf);
1699 strbuf_release(&in_buffer);
1700 curl_slist_free_all(dav_headers);
1701
1702 return lock_flags;
1703 }
1704
1705 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1706 {
1707 struct object_list *entry = xmalloc(sizeof(struct object_list));
1708 entry->item = obj;
1709 entry->next = *p;
1710 *p = entry;
1711 return &entry->next;
1712 }
1713
1714 static struct object_list **process_blob(struct blob *blob,
1715 struct object_list **p,
1716 struct name_path *path,
1717 const char *name)
1718 {
1719 struct object *obj = &blob->object;
1720
1721 obj->flags |= LOCAL;
1722
1723 if (obj->flags & (UNINTERESTING | SEEN))
1724 return p;
1725
1726 obj->flags |= SEEN;
1727 return add_one_object(obj, p);
1728 }
1729
1730 static struct object_list **process_tree(struct tree *tree,
1731 struct object_list **p,
1732 struct name_path *path,
1733 const char *name)
1734 {
1735 struct object *obj = &tree->object;
1736 struct tree_desc desc;
1737 struct name_entry entry;
1738 struct name_path me;
1739
1740 obj->flags |= LOCAL;
1741
1742 if (obj->flags & (UNINTERESTING | SEEN))
1743 return p;
1744 if (parse_tree(tree) < 0)
1745 die("bad tree object %s", sha1_to_hex(obj->sha1));
1746
1747 obj->flags |= SEEN;
1748 name = xstrdup(name);
1749 p = add_one_object(obj, p);
1750 me.up = path;
1751 me.elem = name;
1752 me.elem_len = strlen(name);
1753
1754 init_tree_desc(&desc, tree->buffer, tree->size);
1755
1756 while (tree_entry(&desc, &entry))
1757 switch (object_type(entry.mode)) {
1758 case OBJ_TREE:
1759 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1760 break;
1761 case OBJ_BLOB:
1762 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1763 break;
1764 default:
1765 /* Subproject commit - not in this repository */
1766 break;
1767 }
1768
1769 free(tree->buffer);
1770 tree->buffer = NULL;
1771 return p;
1772 }
1773
1774 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1775 {
1776 int i;
1777 struct commit *commit;
1778 struct object_list **p = &objects;
1779 int count = 0;
1780
1781 while ((commit = get_revision(revs)) != NULL) {
1782 p = process_tree(commit->tree, p, NULL, "");
1783 commit->object.flags |= LOCAL;
1784 if (!(commit->object.flags & UNINTERESTING))
1785 count += add_send_request(&commit->object, lock);
1786 }
1787
1788 for (i = 0; i < revs->pending.nr; i++) {
1789 struct object_array_entry *entry = revs->pending.objects + i;
1790 struct object *obj = entry->item;
1791 const char *name = entry->name;
1792
1793 if (obj->flags & (UNINTERESTING | SEEN))
1794 continue;
1795 if (obj->type == OBJ_TAG) {
1796 obj->flags |= SEEN;
1797 p = add_one_object(obj, p);
1798 continue;
1799 }
1800 if (obj->type == OBJ_TREE) {
1801 p = process_tree((struct tree *)obj, p, NULL, name);
1802 continue;
1803 }
1804 if (obj->type == OBJ_BLOB) {
1805 p = process_blob((struct blob *)obj, p, NULL, name);
1806 continue;
1807 }
1808 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1809 }
1810
1811 while (objects) {
1812 if (!(objects->item->flags & UNINTERESTING))
1813 count += add_send_request(objects->item, lock);
1814 objects = objects->next;
1815 }
1816
1817 return count;
1818 }
1819
1820 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1821 {
1822 struct active_request_slot *slot;
1823 struct slot_results results;
1824 struct buffer out_buffer = { STRBUF_INIT, 0 };
1825 struct curl_slist *dav_headers;
1826
1827 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1828
1829 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1830
1831 slot = get_active_slot();
1832 slot->results = &results;
1833 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1834 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1835 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1836 #ifndef NO_CURL_IOCTL
1837 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1838 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1839 #endif
1840 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1841 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1842 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1843 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1844 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1845 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1846
1847 if (start_active_slot(slot)) {
1848 run_active_slot(slot);
1849 strbuf_release(&out_buffer.buf);
1850 if (results.curl_result != CURLE_OK) {
1851 fprintf(stderr,
1852 "PUT error: curl result=%d, HTTP code=%ld\n",
1853 results.curl_result, results.http_code);
1854 /* We should attempt recovery? */
1855 return 0;
1856 }
1857 } else {
1858 strbuf_release(&out_buffer.buf);
1859 fprintf(stderr, "Unable to start PUT request\n");
1860 return 0;
1861 }
1862
1863 return 1;
1864 }
1865
1866 static struct ref *remote_refs, **remote_tail;
1867
1868 static void one_remote_ref(char *refname)
1869 {
1870 struct ref *ref;
1871 struct object *obj;
1872
1873 ref = alloc_ref(refname);
1874
1875 if (http_fetch_ref(repo->url, ref) != 0) {
1876 fprintf(stderr,
1877 "Unable to fetch ref %s from %s\n",
1878 refname, repo->url);
1879 free(ref);
1880 return;
1881 }
1882
1883 /*
1884 * Fetch a copy of the object if it doesn't exist locally - it
1885 * may be required for updating server info later.
1886 */
1887 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1888 obj = lookup_unknown_object(ref->old_sha1);
1889 if (obj) {
1890 fprintf(stderr, " fetch %s for %s\n",
1891 sha1_to_hex(ref->old_sha1), refname);
1892 add_fetch_request(obj);
1893 }
1894 }
1895
1896 *remote_tail = ref;
1897 remote_tail = &ref->next;
1898 }
1899
1900 static void get_dav_remote_heads(void)
1901 {
1902 remote_tail = &remote_refs;
1903 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1904 }
1905
1906 static int is_zero_sha1(const unsigned char *sha1)
1907 {
1908 int i;
1909
1910 for (i = 0; i < 20; i++) {
1911 if (*sha1++)
1912 return 0;
1913 }
1914 return 1;
1915 }
1916
1917 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1918 {
1919 struct strbuf *buf = (struct strbuf *)ls->userData;
1920 struct object *o;
1921 int len;
1922 char *ref_info;
1923 struct ref *ref;
1924
1925 ref = alloc_ref(ls->dentry_name);
1926
1927 if (http_fetch_ref(repo->url, ref) != 0) {
1928 fprintf(stderr,
1929 "Unable to fetch ref %s from %s\n",
1930 ls->dentry_name, repo->url);
1931 aborted = 1;
1932 free(ref);
1933 return;
1934 }
1935
1936 o = parse_object(ref->old_sha1);
1937 if (!o) {
1938 fprintf(stderr,
1939 "Unable to parse object %s for remote ref %s\n",
1940 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1941 aborted = 1;
1942 free(ref);
1943 return;
1944 }
1945
1946 len = strlen(ls->dentry_name) + 42;
1947 ref_info = xcalloc(len + 1, 1);
1948 sprintf(ref_info, "%s %s\n",
1949 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1950 fwrite_buffer(ref_info, 1, len, buf);
1951 free(ref_info);
1952
1953 if (o->type == OBJ_TAG) {
1954 o = deref_tag(o, ls->dentry_name, 0);
1955 if (o) {
1956 len = strlen(ls->dentry_name) + 45;
1957 ref_info = xcalloc(len + 1, 1);
1958 sprintf(ref_info, "%s %s^{}\n",
1959 sha1_to_hex(o->sha1), ls->dentry_name);
1960 fwrite_buffer(ref_info, 1, len, buf);
1961 free(ref_info);
1962 }
1963 }
1964 free(ref);
1965 }
1966
1967 static void update_remote_info_refs(struct remote_lock *lock)
1968 {
1969 struct buffer buffer = { STRBUF_INIT, 0 };
1970 struct active_request_slot *slot;
1971 struct slot_results results;
1972 struct curl_slist *dav_headers;
1973
1974 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1975 add_remote_info_ref, &buffer.buf);
1976 if (!aborted) {
1977 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1978
1979 slot = get_active_slot();
1980 slot->results = &results;
1981 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1982 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1983 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1984 #ifndef NO_CURL_IOCTL
1985 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1986 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1987 #endif
1988 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1989 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1990 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1991 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1992 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1993 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1994
1995 if (start_active_slot(slot)) {
1996 run_active_slot(slot);
1997 if (results.curl_result != CURLE_OK) {
1998 fprintf(stderr,
1999 "PUT error: curl result=%d, HTTP code=%ld\n",
2000 results.curl_result, results.http_code);
2001 }
2002 }
2003 }
2004 strbuf_release(&buffer.buf);
2005 }
2006
2007 static int remote_exists(const char *path)
2008 {
2009 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2010 struct active_request_slot *slot;
2011 struct slot_results results;
2012 int ret = -1;
2013
2014 sprintf(url, "%s%s", repo->url, path);
2015
2016 slot = get_active_slot();
2017 slot->results = &results;
2018 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2019 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2020
2021 if (start_active_slot(slot)) {
2022 run_active_slot(slot);
2023 if (results.http_code == 404)
2024 ret = 0;
2025 else if (results.curl_result == CURLE_OK)
2026 ret = 1;
2027 else
2028 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2029 } else {
2030 fprintf(stderr, "Unable to start HEAD request\n");
2031 }
2032
2033 free(url);
2034 return ret;
2035 }
2036
2037 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2038 {
2039 char *url;
2040 struct strbuf buffer = STRBUF_INIT;
2041 struct active_request_slot *slot;
2042 struct slot_results results;
2043
2044 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2045 sprintf(url, "%s%s", repo->url, path);
2046
2047 slot = get_active_slot();
2048 slot->results = &results;
2049 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2050 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2051 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2052 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2053 if (start_active_slot(slot)) {
2054 run_active_slot(slot);
2055 if (results.curl_result != CURLE_OK) {
2056 die("Couldn't get %s for remote symref\n%s",
2057 url, curl_errorstr);
2058 }
2059 } else {
2060 die("Unable to start remote symref request");
2061 }
2062 free(url);
2063
2064 free(*symref);
2065 *symref = NULL;
2066 hashclr(sha1);
2067
2068 if (buffer.len == 0)
2069 return;
2070
2071 /* If it's a symref, set the refname; otherwise try for a sha1 */
2072 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2073 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2074 } else {
2075 get_sha1_hex(buffer.buf, sha1);
2076 }
2077
2078 strbuf_release(&buffer);
2079 }
2080
2081 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2082 {
2083 struct commit *head = lookup_commit(head_sha1);
2084 struct commit *branch = lookup_commit(branch_sha1);
2085 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2086
2087 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2088 }
2089
2090 static int delete_remote_branch(char *pattern, int force)
2091 {
2092 struct ref *refs = remote_refs;
2093 struct ref *remote_ref = NULL;
2094 unsigned char head_sha1[20];
2095 char *symref = NULL;
2096 int match;
2097 int patlen = strlen(pattern);
2098 int i;
2099 struct active_request_slot *slot;
2100 struct slot_results results;
2101 char *url;
2102
2103 /* Find the remote branch(es) matching the specified branch name */
2104 for (match = 0; refs; refs = refs->next) {
2105 char *name = refs->name;
2106 int namelen = strlen(name);
2107 if (namelen < patlen ||
2108 memcmp(name + namelen - patlen, pattern, patlen))
2109 continue;
2110 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2111 continue;
2112 match++;
2113 remote_ref = refs;
2114 }
2115 if (match == 0)
2116 return error("No remote branch matches %s", pattern);
2117 if (match != 1)
2118 return error("More than one remote branch matches %s",
2119 pattern);
2120
2121 /*
2122 * Remote HEAD must be a symref (not exactly foolproof; a remote
2123 * symlink to a symref will look like a symref)
2124 */
2125 fetch_symref("HEAD", &symref, head_sha1);
2126 if (!symref)
2127 return error("Remote HEAD is not a symref");
2128
2129 /* Remote branch must not be the remote HEAD */
2130 for (i=0; symref && i<MAXDEPTH; i++) {
2131 if (!strcmp(remote_ref->name, symref))
2132 return error("Remote branch %s is the current HEAD",
2133 remote_ref->name);
2134 fetch_symref(symref, &symref, head_sha1);
2135 }
2136
2137 /* Run extra sanity checks if delete is not forced */
2138 if (!force) {
2139 /* Remote HEAD must resolve to a known object */
2140 if (symref)
2141 return error("Remote HEAD symrefs too deep");
2142 if (is_zero_sha1(head_sha1))
2143 return error("Unable to resolve remote HEAD");
2144 if (!has_sha1_file(head_sha1))
2145 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2146
2147 /* Remote branch must resolve to a known object */
2148 if (is_zero_sha1(remote_ref->old_sha1))
2149 return error("Unable to resolve remote branch %s",
2150 remote_ref->name);
2151 if (!has_sha1_file(remote_ref->old_sha1))
2152 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));
2153
2154 /* Remote branch must be an ancestor of remote HEAD */
2155 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2156 return error("The branch '%s' is not an ancestor "
2157 "of your current HEAD.\n"
2158 "If you are sure you want to delete it,"
2159 " run:\n\t'git http-push -D %s %s'",
2160 remote_ref->name, repo->url, pattern);
2161 }
2162 }
2163
2164 /* Send delete request */
2165 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2166 if (dry_run)
2167 return 0;
2168 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2169 sprintf(url, "%s%s", repo->url, remote_ref->name);
2170 slot = get_active_slot();
2171 slot->results = &results;
2172 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2173 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2174 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2175 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2176 if (start_active_slot(slot)) {
2177 run_active_slot(slot);
2178 free(url);
2179 if (results.curl_result != CURLE_OK)
2180 return error("DELETE request failed (%d/%ld)\n",
2181 results.curl_result, results.http_code);
2182 } else {
2183 free(url);
2184 return error("Unable to start DELETE request");
2185 }
2186
2187 return 0;
2188 }
2189
2190 void run_request_queue(void)
2191 {
2192 #ifdef USE_CURL_MULTI
2193 is_running_queue = 1;
2194 fill_active_slots();
2195 add_fill_function(NULL, fill_active_slot);
2196 #endif
2197 do {
2198 finish_all_active_slots();
2199 #ifdef USE_CURL_MULTI
2200 fill_active_slots();
2201 #endif
2202 } while (request_queue_head && !aborted);
2203
2204 #ifdef USE_CURL_MULTI
2205 is_running_queue = 0;
2206 #endif
2207 }
2208
2209 int main(int argc, char **argv)
2210 {
2211 struct transfer_request *request;
2212 struct transfer_request *next_request;
2213 int nr_refspec = 0;
2214 char **refspec = NULL;
2215 struct remote_lock *ref_lock = NULL;
2216 struct remote_lock *info_ref_lock = NULL;
2217 struct rev_info revs;
2218 int delete_branch = 0;
2219 int force_delete = 0;
2220 int objects_to_send;
2221 int rc = 0;
2222 int i;
2223 int new_refs;
2224 struct ref *ref, *local_refs;
2225 struct remote *remote;
2226 char *rewritten_url = NULL;
2227
2228 git_extract_argv0_path(argv[0]);
2229
2230 setup_git_directory();
2231
2232 repo = xcalloc(sizeof(*repo), 1);
2233
2234 argv++;
2235 for (i = 1; i < argc; i++, argv++) {
2236 char *arg = *argv;
2237
2238 if (*arg == '-') {
2239 if (!strcmp(arg, "--all")) {
2240 push_all = MATCH_REFS_ALL;
2241 continue;
2242 }
2243 if (!strcmp(arg, "--force")) {
2244 force_all = 1;
2245 continue;
2246 }
2247 if (!strcmp(arg, "--dry-run")) {
2248 dry_run = 1;
2249 continue;
2250 }
2251 if (!strcmp(arg, "--verbose")) {
2252 push_verbosely = 1;
2253 continue;
2254 }
2255 if (!strcmp(arg, "-d")) {
2256 delete_branch = 1;
2257 continue;
2258 }
2259 if (!strcmp(arg, "-D")) {
2260 delete_branch = 1;
2261 force_delete = 1;
2262 continue;
2263 }
2264 }
2265 if (!repo->url) {
2266 char *path = strstr(arg, "//");
2267 repo->url = arg;
2268 repo->path_len = strlen(arg);
2269 if (path) {
2270 repo->path = strchr(path+2, '/');
2271 if (repo->path)
2272 repo->path_len = strlen(repo->path);
2273 }
2274 continue;
2275 }
2276 refspec = argv;
2277 nr_refspec = argc - i;
2278 break;
2279 }
2280
2281 #ifndef USE_CURL_MULTI
2282 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2283 #endif
2284
2285 if (!repo->url)
2286 usage(http_push_usage);
2287
2288 if (delete_branch && nr_refspec != 1)
2289 die("You must specify only one branch name when deleting a remote branch");
2290
2291 memset(remote_dir_exists, -1, 256);
2292
2293 /*
2294 * Create a minimum remote by hand to give to http_init(),
2295 * primarily to allow it to look at the URL.
2296 */
2297 remote = xcalloc(sizeof(*remote), 1);
2298 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2299 remote->url[remote->url_nr++] = repo->url;
2300 http_init(remote);
2301
2302 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2303
2304 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2305 rewritten_url = xmalloc(strlen(repo->url)+2);
2306 strcpy(rewritten_url, repo->url);
2307 strcat(rewritten_url, "/");
2308 repo->path = rewritten_url + (repo->path - repo->url);
2309 repo->path_len++;
2310 repo->url = rewritten_url;
2311 }
2312
2313 #ifdef USE_CURL_MULTI
2314 is_running_queue = 0;
2315 #endif
2316
2317 /* Verify DAV compliance/lock support */
2318 if (!locking_available()) {
2319 rc = 1;
2320 goto cleanup;
2321 }
2322
2323 sigchain_push_common(remove_locks_on_signal);
2324
2325 /* Check whether the remote has server info files */
2326 repo->can_update_info_refs = 0;
2327 repo->has_info_refs = remote_exists("info/refs");
2328 repo->has_info_packs = remote_exists("objects/info/packs");
2329 if (repo->has_info_refs) {
2330 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2331 if (info_ref_lock)
2332 repo->can_update_info_refs = 1;
2333 else {
2334 error("cannot lock existing info/refs");
2335 rc = 1;
2336 goto cleanup;
2337 }
2338 }
2339 if (repo->has_info_packs)
2340 fetch_indices();
2341
2342 /* Get a list of all local and remote heads to validate refspecs */
2343 local_refs = get_local_heads();
2344 fprintf(stderr, "Fetching remote heads...\n");
2345 get_dav_remote_heads();
2346 run_request_queue();
2347
2348 /* Remove a remote branch if -d or -D was specified */
2349 if (delete_branch) {
2350 if (delete_remote_branch(refspec[0], force_delete) == -1)
2351 fprintf(stderr, "Unable to delete remote branch %s\n",
2352 refspec[0]);
2353 goto cleanup;
2354 }
2355
2356 /* match them up */
2357 if (!remote_tail)
2358 remote_tail = &remote_refs;
2359 if (match_refs(local_refs, remote_refs, &remote_tail,
2360 nr_refspec, (const char **) refspec, push_all)) {
2361 rc = -1;
2362 goto cleanup;
2363 }
2364 if (!remote_refs) {
2365 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2366 rc = 0;
2367 goto cleanup;
2368 }
2369
2370 new_refs = 0;
2371 for (ref = remote_refs; ref; ref = ref->next) {
2372 char old_hex[60], *new_hex;
2373 const char *commit_argv[4];
2374 int commit_argc;
2375 char *new_sha1_hex, *old_sha1_hex;
2376
2377 if (!ref->peer_ref)
2378 continue;
2379
2380 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2381 if (delete_remote_branch(ref->name, 1) == -1) {
2382 error("Could not remove %s", ref->name);
2383 rc = -4;
2384 }
2385 new_refs++;
2386 continue;
2387 }
2388
2389 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2390 if (push_verbosely || 1)
2391 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2392 continue;
2393 }
2394
2395 if (!force_all &&
2396 !is_zero_sha1(ref->old_sha1) &&
2397 !ref->force) {
2398 if (!has_sha1_file(ref->old_sha1) ||
2399 !ref_newer(ref->peer_ref->new_sha1,
2400 ref->old_sha1)) {
2401 /*
2402 * We do not have the remote ref, or
2403 * we know that the remote ref is not
2404 * an ancestor of what we are trying to
2405 * push. Either way this can be losing
2406 * commits at the remote end and likely
2407 * we were not up to date to begin with.
2408 */
2409 error("remote '%s' is not an ancestor of\n"
2410 "local '%s'.\n"
2411 "Maybe you are not up-to-date and "
2412 "need to pull first?",
2413 ref->name,
2414 ref->peer_ref->name);
2415 rc = -2;
2416 continue;
2417 }
2418 }
2419 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2420 new_refs++;
2421 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2422 new_hex = sha1_to_hex(ref->new_sha1);
2423
2424 fprintf(stderr, "updating '%s'", ref->name);
2425 if (strcmp(ref->name, ref->peer_ref->name))
2426 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2427 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2428 if (dry_run)
2429 continue;
2430
2431 /* Lock remote branch ref */
2432 ref_lock = lock_remote(ref->name, LOCK_TIME);
2433 if (ref_lock == NULL) {
2434 fprintf(stderr, "Unable to lock remote branch %s\n",
2435 ref->name);
2436 rc = 1;
2437 continue;
2438 }
2439
2440 /* Set up revision info for this refspec */
2441 commit_argc = 3;
2442 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2443 old_sha1_hex = NULL;
2444 commit_argv[1] = "--objects";
2445 commit_argv[2] = new_sha1_hex;
2446 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2447 old_sha1_hex = xmalloc(42);
2448 sprintf(old_sha1_hex, "^%s",
2449 sha1_to_hex(ref->old_sha1));
2450 commit_argv[3] = old_sha1_hex;
2451 commit_argc++;
2452 }
2453 init_revisions(&revs, setup_git_directory());
2454 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2455 revs.edge_hint = 0; /* just in case */
2456 free(new_sha1_hex);
2457 if (old_sha1_hex) {
2458 free(old_sha1_hex);
2459 commit_argv[1] = NULL;
2460 }
2461
2462 /* Generate a list of objects that need to be pushed */
2463 pushing = 0;
2464 if (prepare_revision_walk(&revs))
2465 die("revision walk setup failed");
2466 mark_edges_uninteresting(revs.commits, &revs, NULL);
2467 objects_to_send = get_delta(&revs, ref_lock);
2468 finish_all_active_slots();
2469
2470 /* Push missing objects to remote, this would be a
2471 convenient time to pack them first if appropriate. */
2472 pushing = 1;
2473 if (objects_to_send)
2474 fprintf(stderr, " sending %d objects\n",
2475 objects_to_send);
2476
2477 run_request_queue();
2478
2479 /* Update the remote branch if all went well */
2480 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2481 rc = 1;
2482
2483 if (!rc)
2484 fprintf(stderr, " done\n");
2485 unlock_remote(ref_lock);
2486 check_locks();
2487 }
2488
2489 /* Update remote server info if appropriate */
2490 if (repo->has_info_refs && new_refs) {
2491 if (info_ref_lock && repo->can_update_info_refs) {
2492 fprintf(stderr, "Updating remote server info\n");
2493 if (!dry_run)
2494 update_remote_info_refs(info_ref_lock);
2495 } else {
2496 fprintf(stderr, "Unable to update server info\n");
2497 }
2498 }
2499
2500 cleanup:
2501 free(rewritten_url);
2502 if (info_ref_lock)
2503 unlock_remote(info_ref_lock);
2504 free(repo);
2505
2506 curl_slist_free_all(no_pragma_header);
2507
2508 http_cleanup();
2509
2510 request = request_queue_head;
2511 while (request != NULL) {
2512 next_request = request->next;
2513 release_request(request);
2514 request = next_request;
2515 }
2516
2517 return rc;
2518 }
Jonathan Nieder’s miscellaneous git branches