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Allow curl to rewind the read buffers
[git/dscho.git] / http-push.c
blob7dc0dd4ec7e32d7f962fae5fa5d03228c03c8185
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 struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
190 {
191 struct strbuf buf = STRBUF_INIT;
192 struct curl_slist *dav_headers = NULL;
193
194 if (options & DAV_HEADER_IF) {
195 strbuf_addf(&buf, "If: (<%s>)", lock->token);
196 dav_headers = curl_slist_append(dav_headers, buf.buf);
197 strbuf_reset(&buf);
198 }
199 if (options & DAV_HEADER_LOCK) {
200 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
201 dav_headers = curl_slist_append(dav_headers, buf.buf);
202 strbuf_reset(&buf);
203 }
204 if (options & DAV_HEADER_TIMEOUT) {
205 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
206 dav_headers = curl_slist_append(dav_headers, buf.buf);
207 strbuf_reset(&buf);
208 }
209 strbuf_release(&buf);
210
211 return dav_headers;
212 }
213
214 static void append_remote_object_url(struct strbuf *buf, const char *url,
215 const char *hex,
216 int only_two_digit_prefix)
217 {
218 strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
219 if (!only_two_digit_prefix)
220 strbuf_addf(buf, "%s", hex+2);
221 }
222
223 static void finish_request(struct transfer_request *request);
224 static void release_request(struct transfer_request *request);
225
226 static void process_response(void *callback_data)
227 {
228 struct transfer_request *request =
229 (struct transfer_request *)callback_data;
230
231 finish_request(request);
232 }
233
234 #ifdef USE_CURL_MULTI
235
236 static char *get_remote_object_url(const char *url, const char *hex,
237 int only_two_digit_prefix)
238 {
239 struct strbuf buf = STRBUF_INIT;
240 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
241 return strbuf_detach(&buf, NULL);
242 }
243
244 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
245 void *data)
246 {
247 unsigned char expn[4096];
248 size_t size = eltsize * nmemb;
249 int posn = 0;
250 struct transfer_request *request = (struct transfer_request *)data;
251 do {
252 ssize_t retval = xwrite(request->local_fileno,
253 (char *) ptr + posn, size - posn);
254 if (retval < 0)
255 return posn;
256 posn += retval;
257 } while (posn < size);
258
259 request->stream.avail_in = size;
260 request->stream.next_in = ptr;
261 do {
262 request->stream.next_out = expn;
263 request->stream.avail_out = sizeof(expn);
264 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
265 git_SHA1_Update(&request->c, expn,
266 sizeof(expn) - request->stream.avail_out);
267 } while (request->stream.avail_in && request->zret == Z_OK);
268 data_received++;
269 return size;
270 }
271
272 static void start_fetch_loose(struct transfer_request *request)
273 {
274 char *hex = sha1_to_hex(request->obj->sha1);
275 char *filename;
276 char prevfile[PATH_MAX];
277 char *url;
278 int prevlocal;
279 unsigned char prev_buf[PREV_BUF_SIZE];
280 ssize_t prev_read = 0;
281 long prev_posn = 0;
282 char range[RANGE_HEADER_SIZE];
283 struct curl_slist *range_header = NULL;
284 struct active_request_slot *slot;
285
286 filename = sha1_file_name(request->obj->sha1);
287 snprintf(request->filename, sizeof(request->filename), "%s", filename);
288 snprintf(request->tmpfile, sizeof(request->tmpfile),
289 "%s.temp", filename);
290
291 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
292 unlink(prevfile);
293 rename(request->tmpfile, prevfile);
294 unlink(request->tmpfile);
295
296 if (request->local_fileno != -1)
297 error("fd leakage in start: %d", request->local_fileno);
298 request->local_fileno = open(request->tmpfile,
299 O_WRONLY | O_CREAT | O_EXCL, 0666);
300 /* This could have failed due to the "lazy directory creation";
301 * try to mkdir the last path component.
302 */
303 if (request->local_fileno < 0 && errno == ENOENT) {
304 char *dir = strrchr(request->tmpfile, '/');
305 if (dir) {
306 *dir = 0;
307 mkdir(request->tmpfile, 0777);
308 *dir = '/';
309 }
310 request->local_fileno = open(request->tmpfile,
311 O_WRONLY | O_CREAT | O_EXCL, 0666);
312 }
313
314 if (request->local_fileno < 0) {
315 request->state = ABORTED;
316 error("Couldn't create temporary file %s for %s: %s",
317 request->tmpfile, request->filename, strerror(errno));
318 return;
319 }
320
321 memset(&request->stream, 0, sizeof(request->stream));
322
323 git_inflate_init(&request->stream);
324
325 git_SHA1_Init(&request->c);
326
327 url = get_remote_object_url(repo->url, hex, 0);
328 request->url = xstrdup(url);
329
330 /* If a previous temp file is present, process what was already
331 fetched. */
332 prevlocal = open(prevfile, O_RDONLY);
333 if (prevlocal != -1) {
334 do {
335 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
336 if (prev_read>0) {
337 if (fwrite_sha1_file(prev_buf,
338 1,
339 prev_read,
340 request) == prev_read) {
341 prev_posn += prev_read;
342 } else {
343 prev_read = -1;
344 }
345 }
346 } while (prev_read > 0);
347 close(prevlocal);
348 }
349 unlink(prevfile);
350
351 /* Reset inflate/SHA1 if there was an error reading the previous temp
352 file; also rewind to the beginning of the local file. */
353 if (prev_read == -1) {
354 memset(&request->stream, 0, sizeof(request->stream));
355 git_inflate_init(&request->stream);
356 git_SHA1_Init(&request->c);
357 if (prev_posn>0) {
358 prev_posn = 0;
359 lseek(request->local_fileno, 0, SEEK_SET);
360 ftruncate(request->local_fileno, 0);
361 }
362 }
363
364 slot = get_active_slot();
365 slot->callback_func = process_response;
366 slot->callback_data = request;
367 request->slot = slot;
368
369 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
370 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
371 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
372 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
373 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
374
375 /* If we have successfully processed data from a previous fetch
376 attempt, only fetch the data we don't already have. */
377 if (prev_posn>0) {
378 if (push_verbosely)
379 fprintf(stderr,
380 "Resuming fetch of object %s at byte %ld\n",
381 hex, prev_posn);
382 sprintf(range, "Range: bytes=%ld-", prev_posn);
383 range_header = curl_slist_append(range_header, range);
384 curl_easy_setopt(slot->curl,
385 CURLOPT_HTTPHEADER, range_header);
386 }
387
388 /* Try to get the request started, abort the request on error */
389 request->state = RUN_FETCH_LOOSE;
390 if (!start_active_slot(slot)) {
391 fprintf(stderr, "Unable to start GET request\n");
392 repo->can_update_info_refs = 0;
393 release_request(request);
394 }
395 }
396
397 static void start_mkcol(struct transfer_request *request)
398 {
399 char *hex = sha1_to_hex(request->obj->sha1);
400 struct active_request_slot *slot;
401
402 request->url = get_remote_object_url(repo->url, hex, 1);
403
404 slot = get_active_slot();
405 slot->callback_func = process_response;
406 slot->callback_data = request;
407 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
408 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
409 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
410 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
411 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
412
413 if (start_active_slot(slot)) {
414 request->slot = slot;
415 request->state = RUN_MKCOL;
416 } else {
417 request->state = ABORTED;
418 free(request->url);
419 request->url = NULL;
420 }
421 }
422 #endif
423
424 static void start_fetch_packed(struct transfer_request *request)
425 {
426 char *url;
427 struct packed_git *target;
428 FILE *packfile;
429 char *filename;
430 long prev_posn = 0;
431 char range[RANGE_HEADER_SIZE];
432 struct curl_slist *range_header = NULL;
433
434 struct transfer_request *check_request = request_queue_head;
435 struct active_request_slot *slot;
436
437 target = find_sha1_pack(request->obj->sha1, repo->packs);
438 if (!target) {
439 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
440 repo->can_update_info_refs = 0;
441 release_request(request);
442 return;
443 }
444
445 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
446 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
447
448 filename = sha1_pack_name(target->sha1);
449 snprintf(request->filename, sizeof(request->filename), "%s", filename);
450 snprintf(request->tmpfile, sizeof(request->tmpfile),
451 "%s.temp", filename);
452
453 url = xmalloc(strlen(repo->url) + 64);
454 sprintf(url, "%sobjects/pack/pack-%s.pack",
455 repo->url, sha1_to_hex(target->sha1));
456
457 /* Make sure there isn't another open request for this pack */
458 while (check_request) {
459 if (check_request->state == RUN_FETCH_PACKED &&
460 !strcmp(check_request->url, url)) {
461 free(url);
462 release_request(request);
463 return;
464 }
465 check_request = check_request->next;
466 }
467
468 packfile = fopen(request->tmpfile, "a");
469 if (!packfile) {
470 fprintf(stderr, "Unable to open local file %s for pack",
471 request->tmpfile);
472 repo->can_update_info_refs = 0;
473 free(url);
474 return;
475 }
476
477 slot = get_active_slot();
478 slot->callback_func = process_response;
479 slot->callback_data = request;
480 request->slot = slot;
481 request->local_stream = packfile;
482 request->userData = target;
483
484 request->url = url;
485 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
486 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
487 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
488 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
489 slot->local = packfile;
490
491 /* If there is data present from a previous transfer attempt,
492 resume where it left off */
493 prev_posn = ftell(packfile);
494 if (prev_posn>0) {
495 if (push_verbosely)
496 fprintf(stderr,
497 "Resuming fetch of pack %s at byte %ld\n",
498 sha1_to_hex(target->sha1), prev_posn);
499 sprintf(range, "Range: bytes=%ld-", prev_posn);
500 range_header = curl_slist_append(range_header, range);
501 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
502 }
503
504 /* Try to get the request started, abort the request on error */
505 request->state = RUN_FETCH_PACKED;
506 if (!start_active_slot(slot)) {
507 fprintf(stderr, "Unable to start GET request\n");
508 repo->can_update_info_refs = 0;
509 release_request(request);
510 }
511 }
512
513 static void start_put(struct transfer_request *request)
514 {
515 char *hex = sha1_to_hex(request->obj->sha1);
516 struct active_request_slot *slot;
517 struct strbuf buf = STRBUF_INIT;
518 enum object_type type;
519 char hdr[50];
520 void *unpacked;
521 unsigned long len;
522 int hdrlen;
523 ssize_t size;
524 z_stream stream;
525
526 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
527 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
528
529 /* Set it up */
530 memset(&stream, 0, sizeof(stream));
531 deflateInit(&stream, zlib_compression_level);
532 size = deflateBound(&stream, len + hdrlen);
533 strbuf_init(&request->buffer.buf, size);
534 request->buffer.posn = 0;
535
536 /* Compress it */
537 stream.next_out = (unsigned char *)request->buffer.buf.buf;
538 stream.avail_out = size;
539
540 /* First header.. */
541 stream.next_in = (void *)hdr;
542 stream.avail_in = hdrlen;
543 while (deflate(&stream, 0) == Z_OK)
544 /* nothing */;
545
546 /* Then the data itself.. */
547 stream.next_in = unpacked;
548 stream.avail_in = len;
549 while (deflate(&stream, Z_FINISH) == Z_OK)
550 /* nothing */;
551 deflateEnd(&stream);
552 free(unpacked);
553
554 request->buffer.buf.len = stream.total_out;
555
556 strbuf_addstr(&buf, "Destination: ");
557 append_remote_object_url(&buf, repo->url, hex, 0);
558 request->dest = strbuf_detach(&buf, NULL);
559
560 append_remote_object_url(&buf, repo->url, hex, 0);
561 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
562 request->url = strbuf_detach(&buf, NULL);
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
568 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
569 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
570 #ifndef NO_CURL_IOCTL
571 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
572 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
573 #endif
574 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
575 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
576 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
577 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
578 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
579 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
580
581 if (start_active_slot(slot)) {
582 request->slot = slot;
583 request->state = RUN_PUT;
584 } else {
585 request->state = ABORTED;
586 free(request->url);
587 request->url = NULL;
588 }
589 }
590
591 static void start_move(struct transfer_request *request)
592 {
593 struct active_request_slot *slot;
594 struct curl_slist *dav_headers = NULL;
595
596 slot = get_active_slot();
597 slot->callback_func = process_response;
598 slot->callback_data = request;
599 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
600 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
601 dav_headers = curl_slist_append(dav_headers, request->dest);
602 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
603 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
604 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
605 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
606
607 if (start_active_slot(slot)) {
608 request->slot = slot;
609 request->state = RUN_MOVE;
610 } else {
611 request->state = ABORTED;
612 free(request->url);
613 request->url = NULL;
614 }
615 }
616
617 static int refresh_lock(struct remote_lock *lock)
618 {
619 struct active_request_slot *slot;
620 struct slot_results results;
621 struct curl_slist *dav_headers;
622 int rc = 0;
623
624 lock->refreshing = 1;
625
626 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
627
628 slot = get_active_slot();
629 slot->results = &results;
630 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
631 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
632 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
633 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
634 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
635
636 if (start_active_slot(slot)) {
637 run_active_slot(slot);
638 if (results.curl_result != CURLE_OK) {
639 fprintf(stderr, "LOCK HTTP error %ld\n",
640 results.http_code);
641 } else {
642 lock->start_time = time(NULL);
643 rc = 1;
644 }
645 }
646
647 lock->refreshing = 0;
648 curl_slist_free_all(dav_headers);
649
650 return rc;
651 }
652
653 static void check_locks(void)
654 {
655 struct remote_lock *lock = repo->locks;
656 time_t current_time = time(NULL);
657 int time_remaining;
658
659 while (lock) {
660 time_remaining = lock->start_time + lock->timeout -
661 current_time;
662 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
663 if (!refresh_lock(lock)) {
664 fprintf(stderr,
665 "Unable to refresh lock for %s\n",
666 lock->url);
667 aborted = 1;
668 return;
669 }
670 }
671 lock = lock->next;
672 }
673 }
674
675 static void release_request(struct transfer_request *request)
676 {
677 struct transfer_request *entry = request_queue_head;
678
679 if (request == request_queue_head) {
680 request_queue_head = request->next;
681 } else {
682 while (entry->next != NULL && entry->next != request)
683 entry = entry->next;
684 if (entry->next == request)
685 entry->next = entry->next->next;
686 }
687
688 if (request->local_fileno != -1)
689 close(request->local_fileno);
690 if (request->local_stream)
691 fclose(request->local_stream);
692 free(request->url);
693 free(request);
694 }
695
696 static void finish_request(struct transfer_request *request)
697 {
698 struct stat st;
699 struct packed_git *target;
700 struct packed_git **lst;
701
702 request->curl_result = request->slot->curl_result;
703 request->http_code = request->slot->http_code;
704 request->slot = NULL;
705
706 /* Keep locks active */
707 check_locks();
708
709 if (request->headers != NULL)
710 curl_slist_free_all(request->headers);
711
712 /* URL is reused for MOVE after PUT */
713 if (request->state != RUN_PUT) {
714 free(request->url);
715 request->url = NULL;
716 }
717
718 if (request->state == RUN_MKCOL) {
719 if (request->curl_result == CURLE_OK ||
720 request->http_code == 405) {
721 remote_dir_exists[request->obj->sha1[0]] = 1;
722 start_put(request);
723 } else {
724 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_PUT) {
731 if (request->curl_result == CURLE_OK) {
732 start_move(request);
733 } else {
734 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
735 sha1_to_hex(request->obj->sha1),
736 request->curl_result, request->http_code);
737 request->state = ABORTED;
738 aborted = 1;
739 }
740 } else if (request->state == RUN_MOVE) {
741 if (request->curl_result == CURLE_OK) {
742 if (push_verbosely)
743 fprintf(stderr, " sent %s\n",
744 sha1_to_hex(request->obj->sha1));
745 request->obj->flags |= REMOTE;
746 release_request(request);
747 } else {
748 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
749 sha1_to_hex(request->obj->sha1),
750 request->curl_result, request->http_code);
751 request->state = ABORTED;
752 aborted = 1;
753 }
754 } else if (request->state == RUN_FETCH_LOOSE) {
755 fchmod(request->local_fileno, 0444);
756 close(request->local_fileno); request->local_fileno = -1;
757
758 if (request->curl_result != CURLE_OK &&
759 request->http_code != 416) {
760 if (stat(request->tmpfile, &st) == 0) {
761 if (st.st_size == 0)
762 unlink(request->tmpfile);
763 }
764 } else {
765 if (request->http_code == 416)
766 warning("requested range invalid; we may already have all the data.");
767
768 git_inflate_end(&request->stream);
769 git_SHA1_Final(request->real_sha1, &request->c);
770 if (request->zret != Z_STREAM_END) {
771 unlink(request->tmpfile);
772 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
773 unlink(request->tmpfile);
774 } else {
775 request->rename =
776 move_temp_to_file(
777 request->tmpfile,
778 request->filename);
779 if (request->rename == 0) {
780 request->obj->flags |= (LOCAL | REMOTE);
781 }
782 }
783 }
784
785 /* Try fetching packed if necessary */
786 if (request->obj->flags & LOCAL)
787 release_request(request);
788 else
789 start_fetch_packed(request);
790
791 } else if (request->state == RUN_FETCH_PACKED) {
792 if (request->curl_result != CURLE_OK) {
793 fprintf(stderr, "Unable to get pack file %s\n%s",
794 request->url, curl_errorstr);
795 repo->can_update_info_refs = 0;
796 } else {
797 off_t pack_size = ftell(request->local_stream);
798
799 fclose(request->local_stream);
800 request->local_stream = NULL;
801 if (!move_temp_to_file(request->tmpfile,
802 request->filename)) {
803 target = (struct packed_git *)request->userData;
804 target->pack_size = pack_size;
805 lst = &repo->packs;
806 while (*lst != target)
807 lst = &((*lst)->next);
808 *lst = (*lst)->next;
809
810 if (!verify_pack(target))
811 install_packed_git(target);
812 else
813 repo->can_update_info_refs = 0;
814 }
815 }
816 release_request(request);
817 }
818 }
819
820 #ifdef USE_CURL_MULTI
821 static int fill_active_slot(void *unused)
822 {
823 struct transfer_request *request;
824
825 if (aborted)
826 return 0;
827
828 for (request = request_queue_head; request; request = request->next) {
829 if (request->state == NEED_FETCH) {
830 start_fetch_loose(request);
831 return 1;
832 } else if (pushing && request->state == NEED_PUSH) {
833 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
834 start_put(request);
835 } else {
836 start_mkcol(request);
837 }
838 return 1;
839 }
840 }
841 return 0;
842 }
843 #endif
844
845 static void get_remote_object_list(unsigned char parent);
846
847 static void add_fetch_request(struct object *obj)
848 {
849 struct transfer_request *request;
850
851 check_locks();
852
853 /*
854 * Don't fetch the object if it's known to exist locally
855 * or is already in the request queue
856 */
857 if (remote_dir_exists[obj->sha1[0]] == -1)
858 get_remote_object_list(obj->sha1[0]);
859 if (obj->flags & (LOCAL | FETCHING))
860 return;
861
862 obj->flags |= FETCHING;
863 request = xmalloc(sizeof(*request));
864 request->obj = obj;
865 request->url = NULL;
866 request->lock = NULL;
867 request->headers = NULL;
868 request->local_fileno = -1;
869 request->local_stream = NULL;
870 request->state = NEED_FETCH;
871 request->next = request_queue_head;
872 request_queue_head = request;
873
874 #ifdef USE_CURL_MULTI
875 fill_active_slots();
876 step_active_slots();
877 #endif
878 }
879
880 static int add_send_request(struct object *obj, struct remote_lock *lock)
881 {
882 struct transfer_request *request = request_queue_head;
883 struct packed_git *target;
884
885 /* Keep locks active */
886 check_locks();
887
888 /*
889 * Don't push the object if it's known to exist on the remote
890 * or is already in the request queue
891 */
892 if (remote_dir_exists[obj->sha1[0]] == -1)
893 get_remote_object_list(obj->sha1[0]);
894 if (obj->flags & (REMOTE | PUSHING))
895 return 0;
896 target = find_sha1_pack(obj->sha1, repo->packs);
897 if (target) {
898 obj->flags |= REMOTE;
899 return 0;
900 }
901
902 obj->flags |= PUSHING;
903 request = xmalloc(sizeof(*request));
904 request->obj = obj;
905 request->url = NULL;
906 request->lock = lock;
907 request->headers = NULL;
908 request->local_fileno = -1;
909 request->local_stream = NULL;
910 request->state = NEED_PUSH;
911 request->next = request_queue_head;
912 request_queue_head = request;
913
914 #ifdef USE_CURL_MULTI
915 fill_active_slots();
916 step_active_slots();
917 #endif
918
919 return 1;
920 }
921
922 static int fetch_index(unsigned char *sha1)
923 {
924 char *hex = sha1_to_hex(sha1);
925 char *filename;
926 char *url;
927 char tmpfile[PATH_MAX];
928 long prev_posn = 0;
929 char range[RANGE_HEADER_SIZE];
930 struct curl_slist *range_header = NULL;
931
932 FILE *indexfile;
933 struct active_request_slot *slot;
934 struct slot_results results;
935
936 /* Don't use the index if the pack isn't there */
937 url = xmalloc(strlen(repo->url) + 64);
938 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
939 slot = get_active_slot();
940 slot->results = &results;
941 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
942 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
943 if (start_active_slot(slot)) {
944 run_active_slot(slot);
945 if (results.curl_result != CURLE_OK) {
946 free(url);
947 return error("Unable to verify pack %s is available",
948 hex);
949 }
950 } else {
951 free(url);
952 return error("Unable to start request");
953 }
954
955 if (has_pack_index(sha1)) {
956 free(url);
957 return 0;
958 }
959
960 if (push_verbosely)
961 fprintf(stderr, "Getting index for pack %s\n", hex);
962
963 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
964
965 filename = sha1_pack_index_name(sha1);
966 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
967 indexfile = fopen(tmpfile, "a");
968 if (!indexfile) {
969 free(url);
970 return error("Unable to open local file %s for pack index",
971 tmpfile);
972 }
973
974 slot = get_active_slot();
975 slot->results = &results;
976 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
977 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
978 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
979 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
980 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
981 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
982 slot->local = indexfile;
983
984 /* If there is data present from a previous transfer attempt,
985 resume where it left off */
986 prev_posn = ftell(indexfile);
987 if (prev_posn>0) {
988 if (push_verbosely)
989 fprintf(stderr,
990 "Resuming fetch of index for pack %s at byte %ld\n",
991 hex, prev_posn);
992 sprintf(range, "Range: bytes=%ld-", prev_posn);
993 range_header = curl_slist_append(range_header, range);
994 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
995 }
996
997 if (start_active_slot(slot)) {
998 run_active_slot(slot);
999 if (results.curl_result != CURLE_OK) {
1000 free(url);
1001 fclose(indexfile);
1002 return error("Unable to get pack index %s\n%s", url,
1003 curl_errorstr);
1004 }
1005 } else {
1006 free(url);
1007 fclose(indexfile);
1008 return error("Unable to start request");
1009 }
1010
1011 free(url);
1012 fclose(indexfile);
1013
1014 return move_temp_to_file(tmpfile, filename);
1015 }
1016
1017 static int setup_index(unsigned char *sha1)
1018 {
1019 struct packed_git *new_pack;
1020
1021 if (fetch_index(sha1))
1022 return -1;
1023
1024 new_pack = parse_pack_index(sha1);
1025 new_pack->next = repo->packs;
1026 repo->packs = new_pack;
1027 return 0;
1028 }
1029
1030 static int fetch_indices(void)
1031 {
1032 unsigned char sha1[20];
1033 char *url;
1034 struct strbuf buffer = STRBUF_INIT;
1035 char *data;
1036 int i = 0;
1037
1038 struct active_request_slot *slot;
1039 struct slot_results results;
1040
1041 if (push_verbosely)
1042 fprintf(stderr, "Getting pack list\n");
1043
1044 url = xmalloc(strlen(repo->url) + 20);
1045 sprintf(url, "%sobjects/info/packs", repo->url);
1046
1047 slot = get_active_slot();
1048 slot->results = &results;
1049 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1050 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1051 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1052 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1053 if (start_active_slot(slot)) {
1054 run_active_slot(slot);
1055 if (results.curl_result != CURLE_OK) {
1056 strbuf_release(&buffer);
1057 free(url);
1058 if (results.http_code == 404)
1059 return 0;
1060 else
1061 return error("%s", curl_errorstr);
1062 }
1063 } else {
1064 strbuf_release(&buffer);
1065 free(url);
1066 return error("Unable to start request");
1067 }
1068 free(url);
1069
1070 data = buffer.buf;
1071 while (i < buffer.len) {
1072 switch (data[i]) {
1073 case 'P':
1074 i++;
1075 if (i + 52 < buffer.len &&
1076 !prefixcmp(data + i, " pack-") &&
1077 !prefixcmp(data + i + 46, ".pack\n")) {
1078 get_sha1_hex(data + i + 6, sha1);
1079 setup_index(sha1);
1080 i += 51;
1081 break;
1082 }
1083 default:
1084 while (data[i] != '\n')
1085 i++;
1086 }
1087 i++;
1088 }
1089
1090 strbuf_release(&buffer);
1091 return 0;
1092 }
1093
1094 static void one_remote_object(const char *hex)
1095 {
1096 unsigned char sha1[20];
1097 struct object *obj;
1098
1099 if (get_sha1_hex(hex, sha1) != 0)
1100 return;
1101
1102 obj = lookup_object(sha1);
1103 if (!obj)
1104 obj = parse_object(sha1);
1105
1106 /* Ignore remote objects that don't exist locally */
1107 if (!obj)
1108 return;
1109
1110 obj->flags |= REMOTE;
1111 if (!object_list_contains(objects, obj))
1112 object_list_insert(obj, &objects);
1113 }
1114
1115 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1116 {
1117 int *lock_flags = (int *)ctx->userData;
1118
1119 if (tag_closed) {
1120 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1121 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1122 (*lock_flags & DAV_PROP_LOCKWR)) {
1123 *lock_flags |= DAV_LOCK_OK;
1124 }
1125 *lock_flags &= DAV_LOCK_OK;
1126 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1127 *lock_flags |= DAV_PROP_LOCKWR;
1128 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1129 *lock_flags |= DAV_PROP_LOCKEX;
1130 }
1131 }
1132 }
1133
1134 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1135 {
1136 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1137 git_SHA_CTX sha_ctx;
1138 unsigned char lock_token_sha1[20];
1139
1140 if (tag_closed && ctx->cdata) {
1141 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1142 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1143 strcpy(lock->owner, ctx->cdata);
1144 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1145 if (!prefixcmp(ctx->cdata, "Second-"))
1146 lock->timeout =
1147 strtol(ctx->cdata + 7, NULL, 10);
1148 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1149 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1150 strcpy(lock->token, ctx->cdata);
1151
1152 git_SHA1_Init(&sha_ctx);
1153 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1154 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1155
1156 lock->tmpfile_suffix[0] = '_';
1157 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1158 }
1159 }
1160 }
1161
1162 static void one_remote_ref(char *refname);
1163
1164 static void
1165 xml_start_tag(void *userData, const char *name, const char **atts)
1166 {
1167 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1168 const char *c = strchr(name, ':');
1169 int new_len;
1170
1171 if (c == NULL)
1172 c = name;
1173 else
1174 c++;
1175
1176 new_len = strlen(ctx->name) + strlen(c) + 2;
1177
1178 if (new_len > ctx->len) {
1179 ctx->name = xrealloc(ctx->name, new_len);
1180 ctx->len = new_len;
1181 }
1182 strcat(ctx->name, ".");
1183 strcat(ctx->name, c);
1184
1185 free(ctx->cdata);
1186 ctx->cdata = NULL;
1187
1188 ctx->userFunc(ctx, 0);
1189 }
1190
1191 static void
1192 xml_end_tag(void *userData, const char *name)
1193 {
1194 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1195 const char *c = strchr(name, ':');
1196 char *ep;
1197
1198 ctx->userFunc(ctx, 1);
1199
1200 if (c == NULL)
1201 c = name;
1202 else
1203 c++;
1204
1205 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1206 *ep = 0;
1207 }
1208
1209 static void
1210 xml_cdata(void *userData, const XML_Char *s, int len)
1211 {
1212 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1213 free(ctx->cdata);
1214 ctx->cdata = xmemdupz(s, len);
1215 }
1216
1217 static struct remote_lock *lock_remote(const char *path, long timeout)
1218 {
1219 struct active_request_slot *slot;
1220 struct slot_results results;
1221 struct buffer out_buffer = { STRBUF_INIT, 0 };
1222 struct strbuf in_buffer = STRBUF_INIT;
1223 char *url;
1224 char *ep;
1225 char timeout_header[25];
1226 struct remote_lock *lock = NULL;
1227 struct curl_slist *dav_headers = NULL;
1228 struct xml_ctx ctx;
1229
1230 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1231 sprintf(url, "%s%s", repo->url, path);
1232
1233 /* Make sure leading directories exist for the remote ref */
1234 ep = strchr(url + strlen(repo->url) + 1, '/');
1235 while (ep) {
1236 char saved_character = ep[1];
1237 ep[1] = '\0';
1238 slot = get_active_slot();
1239 slot->results = &results;
1240 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1241 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1242 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1244 if (start_active_slot(slot)) {
1245 run_active_slot(slot);
1246 if (results.curl_result != CURLE_OK &&
1247 results.http_code != 405) {
1248 fprintf(stderr,
1249 "Unable to create branch path %s\n",
1250 url);
1251 free(url);
1252 return NULL;
1253 }
1254 } else {
1255 fprintf(stderr, "Unable to start MKCOL request\n");
1256 free(url);
1257 return NULL;
1258 }
1259 ep[1] = saved_character;
1260 ep = strchr(ep + 1, '/');
1261 }
1262
1263 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1264
1265 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1266 dav_headers = curl_slist_append(dav_headers, timeout_header);
1267 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1268
1269 slot = get_active_slot();
1270 slot->results = &results;
1271 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1272 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1273 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1274 #ifndef NO_CURL_IOCTL
1275 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1276 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1277 #endif
1278 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1279 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1280 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1281 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1282 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1283 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1284
1285 lock = xcalloc(1, sizeof(*lock));
1286 lock->timeout = -1;
1287
1288 if (start_active_slot(slot)) {
1289 run_active_slot(slot);
1290 if (results.curl_result == CURLE_OK) {
1291 XML_Parser parser = XML_ParserCreate(NULL);
1292 enum XML_Status result;
1293 ctx.name = xcalloc(10, 1);
1294 ctx.len = 0;
1295 ctx.cdata = NULL;
1296 ctx.userFunc = handle_new_lock_ctx;
1297 ctx.userData = lock;
1298 XML_SetUserData(parser, &ctx);
1299 XML_SetElementHandler(parser, xml_start_tag,
1300 xml_end_tag);
1301 XML_SetCharacterDataHandler(parser, xml_cdata);
1302 result = XML_Parse(parser, in_buffer.buf,
1303 in_buffer.len, 1);
1304 free(ctx.name);
1305 if (result != XML_STATUS_OK) {
1306 fprintf(stderr, "XML error: %s\n",
1307 XML_ErrorString(
1308 XML_GetErrorCode(parser)));
1309 lock->timeout = -1;
1310 }
1311 XML_ParserFree(parser);
1312 }
1313 } else {
1314 fprintf(stderr, "Unable to start LOCK request\n");
1315 }
1316
1317 curl_slist_free_all(dav_headers);
1318 strbuf_release(&out_buffer.buf);
1319 strbuf_release(&in_buffer);
1320
1321 if (lock->token == NULL || lock->timeout <= 0) {
1322 free(lock->token);
1323 free(lock->owner);
1324 free(url);
1325 free(lock);
1326 lock = NULL;
1327 } else {
1328 lock->url = url;
1329 lock->start_time = time(NULL);
1330 lock->next = repo->locks;
1331 repo->locks = lock;
1332 }
1333
1334 return lock;
1335 }
1336
1337 static int unlock_remote(struct remote_lock *lock)
1338 {
1339 struct active_request_slot *slot;
1340 struct slot_results results;
1341 struct remote_lock *prev = repo->locks;
1342 struct curl_slist *dav_headers;
1343 int rc = 0;
1344
1345 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1346
1347 slot = get_active_slot();
1348 slot->results = &results;
1349 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1350 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1351 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1352 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1353
1354 if (start_active_slot(slot)) {
1355 run_active_slot(slot);
1356 if (results.curl_result == CURLE_OK)
1357 rc = 1;
1358 else
1359 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1360 results.http_code);
1361 } else {
1362 fprintf(stderr, "Unable to start UNLOCK request\n");
1363 }
1364
1365 curl_slist_free_all(dav_headers);
1366
1367 if (repo->locks == lock) {
1368 repo->locks = lock->next;
1369 } else {
1370 while (prev && prev->next != lock)
1371 prev = prev->next;
1372 if (prev)
1373 prev->next = prev->next->next;
1374 }
1375
1376 free(lock->owner);
1377 free(lock->url);
1378 free(lock->token);
1379 free(lock);
1380
1381 return rc;
1382 }
1383
1384 static void remove_locks(void)
1385 {
1386 struct remote_lock *lock = repo->locks;
1387
1388 fprintf(stderr, "Removing remote locks...\n");
1389 while (lock) {
1390 unlock_remote(lock);
1391 lock = lock->next;
1392 }
1393 }
1394
1395 static void remove_locks_on_signal(int signo)
1396 {
1397 remove_locks();
1398 sigchain_pop(signo);
1399 raise(signo);
1400 }
1401
1402 static void remote_ls(const char *path, int flags,
1403 void (*userFunc)(struct remote_ls_ctx *ls),
1404 void *userData);
1405
1406 static void process_ls_object(struct remote_ls_ctx *ls)
1407 {
1408 unsigned int *parent = (unsigned int *)ls->userData;
1409 char *path = ls->dentry_name;
1410 char *obj_hex;
1411
1412 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1413 remote_dir_exists[*parent] = 1;
1414 return;
1415 }
1416
1417 if (strlen(path) != 49)
1418 return;
1419 path += 8;
1420 obj_hex = xmalloc(strlen(path));
1421 /* NB: path is not null-terminated, can not use strlcpy here */
1422 memcpy(obj_hex, path, 2);
1423 strcpy(obj_hex + 2, path + 3);
1424 one_remote_object(obj_hex);
1425 free(obj_hex);
1426 }
1427
1428 static void process_ls_ref(struct remote_ls_ctx *ls)
1429 {
1430 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1431 fprintf(stderr, " %s\n", ls->dentry_name);
1432 return;
1433 }
1434
1435 if (!(ls->dentry_flags & IS_DIR))
1436 one_remote_ref(ls->dentry_name);
1437 }
1438
1439 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1440 {
1441 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1442
1443 if (tag_closed) {
1444 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1445 if (ls->dentry_flags & IS_DIR) {
1446 if (ls->flags & PROCESS_DIRS) {
1447 ls->userFunc(ls);
1448 }
1449 if (strcmp(ls->dentry_name, ls->path) &&
1450 ls->flags & RECURSIVE) {
1451 remote_ls(ls->dentry_name,
1452 ls->flags,
1453 ls->userFunc,
1454 ls->userData);
1455 }
1456 } else if (ls->flags & PROCESS_FILES) {
1457 ls->userFunc(ls);
1458 }
1459 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1460 char *path = ctx->cdata;
1461 if (*ctx->cdata == 'h') {
1462 path = strstr(path, "//");
1463 if (path) {
1464 path = strchr(path+2, '/');
1465 }
1466 }
1467 if (path) {
1468 path += repo->path_len;
1469 ls->dentry_name = xstrdup(path);
1470 }
1471 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1472 ls->dentry_flags |= IS_DIR;
1473 }
1474 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1475 free(ls->dentry_name);
1476 ls->dentry_name = NULL;
1477 ls->dentry_flags = 0;
1478 }
1479 }
1480
1481 /*
1482 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1483 * should _only_ heed the information from that file, instead of trying to
1484 * determine the refs from the remote file system (badly: it does not even
1485 * know about packed-refs).
1486 */
1487 static void remote_ls(const char *path, int flags,
1488 void (*userFunc)(struct remote_ls_ctx *ls),
1489 void *userData)
1490 {
1491 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1492 struct active_request_slot *slot;
1493 struct slot_results results;
1494 struct strbuf in_buffer = STRBUF_INIT;
1495 struct buffer out_buffer = { STRBUF_INIT, 0 };
1496 struct curl_slist *dav_headers = NULL;
1497 struct xml_ctx ctx;
1498 struct remote_ls_ctx ls;
1499
1500 ls.flags = flags;
1501 ls.path = xstrdup(path);
1502 ls.dentry_name = NULL;
1503 ls.dentry_flags = 0;
1504 ls.userData = userData;
1505 ls.userFunc = userFunc;
1506
1507 sprintf(url, "%s%s", repo->url, path);
1508
1509 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1510
1511 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1512 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1513
1514 slot = get_active_slot();
1515 slot->results = &results;
1516 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1517 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1518 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1519 #ifndef NO_CURL_IOCTL
1520 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1521 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1522 #endif
1523 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1524 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1525 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1526 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1527 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1528 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1529
1530 if (start_active_slot(slot)) {
1531 run_active_slot(slot);
1532 if (results.curl_result == CURLE_OK) {
1533 XML_Parser parser = XML_ParserCreate(NULL);
1534 enum XML_Status result;
1535 ctx.name = xcalloc(10, 1);
1536 ctx.len = 0;
1537 ctx.cdata = NULL;
1538 ctx.userFunc = handle_remote_ls_ctx;
1539 ctx.userData = &ls;
1540 XML_SetUserData(parser, &ctx);
1541 XML_SetElementHandler(parser, xml_start_tag,
1542 xml_end_tag);
1543 XML_SetCharacterDataHandler(parser, xml_cdata);
1544 result = XML_Parse(parser, in_buffer.buf,
1545 in_buffer.len, 1);
1546 free(ctx.name);
1547
1548 if (result != XML_STATUS_OK) {
1549 fprintf(stderr, "XML error: %s\n",
1550 XML_ErrorString(
1551 XML_GetErrorCode(parser)));
1552 }
1553 XML_ParserFree(parser);
1554 }
1555 } else {
1556 fprintf(stderr, "Unable to start PROPFIND request\n");
1557 }
1558
1559 free(ls.path);
1560 free(url);
1561 strbuf_release(&out_buffer.buf);
1562 strbuf_release(&in_buffer);
1563 curl_slist_free_all(dav_headers);
1564 }
1565
1566 static void get_remote_object_list(unsigned char parent)
1567 {
1568 char path[] = "objects/XX/";
1569 static const char hex[] = "0123456789abcdef";
1570 unsigned int val = parent;
1571
1572 path[8] = hex[val >> 4];
1573 path[9] = hex[val & 0xf];
1574 remote_dir_exists[val] = 0;
1575 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1576 process_ls_object, &val);
1577 }
1578
1579 static int locking_available(void)
1580 {
1581 struct active_request_slot *slot;
1582 struct slot_results results;
1583 struct strbuf in_buffer = STRBUF_INIT;
1584 struct buffer out_buffer = { STRBUF_INIT, 0 };
1585 struct curl_slist *dav_headers = NULL;
1586 struct xml_ctx ctx;
1587 int lock_flags = 0;
1588
1589 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, repo->url);
1590
1591 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1592 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1593
1594 slot = get_active_slot();
1595 slot->results = &results;
1596 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1597 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1598 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1599 #ifndef NO_CURL_IOCTL
1600 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1601 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1602 #endif
1603 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1604 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1605 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1606 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1609
1610 if (start_active_slot(slot)) {
1611 run_active_slot(slot);
1612 if (results.curl_result == CURLE_OK) {
1613 XML_Parser parser = XML_ParserCreate(NULL);
1614 enum XML_Status result;
1615 ctx.name = xcalloc(10, 1);
1616 ctx.len = 0;
1617 ctx.cdata = NULL;
1618 ctx.userFunc = handle_lockprop_ctx;
1619 ctx.userData = &lock_flags;
1620 XML_SetUserData(parser, &ctx);
1621 XML_SetElementHandler(parser, xml_start_tag,
1622 xml_end_tag);
1623 result = XML_Parse(parser, in_buffer.buf,
1624 in_buffer.len, 1);
1625 free(ctx.name);
1626
1627 if (result != XML_STATUS_OK) {
1628 fprintf(stderr, "XML error: %s\n",
1629 XML_ErrorString(
1630 XML_GetErrorCode(parser)));
1631 lock_flags = 0;
1632 }
1633 XML_ParserFree(parser);
1634 if (!lock_flags)
1635 error("no DAV locking support on %s",
1636 repo->url);
1637
1638 } else {
1639 error("Cannot access URL %s, return code %d",
1640 repo->url, results.curl_result);
1641 lock_flags = 0;
1642 }
1643 } else {
1644 error("Unable to start PROPFIND request on %s", repo->url);
1645 }
1646
1647 strbuf_release(&out_buffer.buf);
1648 strbuf_release(&in_buffer);
1649 curl_slist_free_all(dav_headers);
1650
1651 return lock_flags;
1652 }
1653
1654 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1655 {
1656 struct object_list *entry = xmalloc(sizeof(struct object_list));
1657 entry->item = obj;
1658 entry->next = *p;
1659 *p = entry;
1660 return &entry->next;
1661 }
1662
1663 static struct object_list **process_blob(struct blob *blob,
1664 struct object_list **p,
1665 struct name_path *path,
1666 const char *name)
1667 {
1668 struct object *obj = &blob->object;
1669
1670 obj->flags |= LOCAL;
1671
1672 if (obj->flags & (UNINTERESTING | SEEN))
1673 return p;
1674
1675 obj->flags |= SEEN;
1676 return add_one_object(obj, p);
1677 }
1678
1679 static struct object_list **process_tree(struct tree *tree,
1680 struct object_list **p,
1681 struct name_path *path,
1682 const char *name)
1683 {
1684 struct object *obj = &tree->object;
1685 struct tree_desc desc;
1686 struct name_entry entry;
1687 struct name_path me;
1688
1689 obj->flags |= LOCAL;
1690
1691 if (obj->flags & (UNINTERESTING | SEEN))
1692 return p;
1693 if (parse_tree(tree) < 0)
1694 die("bad tree object %s", sha1_to_hex(obj->sha1));
1695
1696 obj->flags |= SEEN;
1697 name = xstrdup(name);
1698 p = add_one_object(obj, p);
1699 me.up = path;
1700 me.elem = name;
1701 me.elem_len = strlen(name);
1702
1703 init_tree_desc(&desc, tree->buffer, tree->size);
1704
1705 while (tree_entry(&desc, &entry))
1706 switch (object_type(entry.mode)) {
1707 case OBJ_TREE:
1708 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1709 break;
1710 case OBJ_BLOB:
1711 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1712 break;
1713 default:
1714 /* Subproject commit - not in this repository */
1715 break;
1716 }
1717
1718 free(tree->buffer);
1719 tree->buffer = NULL;
1720 return p;
1721 }
1722
1723 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1724 {
1725 int i;
1726 struct commit *commit;
1727 struct object_list **p = &objects;
1728 int count = 0;
1729
1730 while ((commit = get_revision(revs)) != NULL) {
1731 p = process_tree(commit->tree, p, NULL, "");
1732 commit->object.flags |= LOCAL;
1733 if (!(commit->object.flags & UNINTERESTING))
1734 count += add_send_request(&commit->object, lock);
1735 }
1736
1737 for (i = 0; i < revs->pending.nr; i++) {
1738 struct object_array_entry *entry = revs->pending.objects + i;
1739 struct object *obj = entry->item;
1740 const char *name = entry->name;
1741
1742 if (obj->flags & (UNINTERESTING | SEEN))
1743 continue;
1744 if (obj->type == OBJ_TAG) {
1745 obj->flags |= SEEN;
1746 p = add_one_object(obj, p);
1747 continue;
1748 }
1749 if (obj->type == OBJ_TREE) {
1750 p = process_tree((struct tree *)obj, p, NULL, name);
1751 continue;
1752 }
1753 if (obj->type == OBJ_BLOB) {
1754 p = process_blob((struct blob *)obj, p, NULL, name);
1755 continue;
1756 }
1757 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1758 }
1759
1760 while (objects) {
1761 if (!(objects->item->flags & UNINTERESTING))
1762 count += add_send_request(objects->item, lock);
1763 objects = objects->next;
1764 }
1765
1766 return count;
1767 }
1768
1769 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1770 {
1771 struct active_request_slot *slot;
1772 struct slot_results results;
1773 struct buffer out_buffer = { STRBUF_INIT, 0 };
1774 struct curl_slist *dav_headers;
1775
1776 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1777
1778 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1779
1780 slot = get_active_slot();
1781 slot->results = &results;
1782 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1783 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1784 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1785 #ifndef NO_CURL_IOCTL
1786 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1787 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1788 #endif
1789 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1790 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1791 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1792 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1793 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1794 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1795
1796 if (start_active_slot(slot)) {
1797 run_active_slot(slot);
1798 strbuf_release(&out_buffer.buf);
1799 if (results.curl_result != CURLE_OK) {
1800 fprintf(stderr,
1801 "PUT error: curl result=%d, HTTP code=%ld\n",
1802 results.curl_result, results.http_code);
1803 /* We should attempt recovery? */
1804 return 0;
1805 }
1806 } else {
1807 strbuf_release(&out_buffer.buf);
1808 fprintf(stderr, "Unable to start PUT request\n");
1809 return 0;
1810 }
1811
1812 return 1;
1813 }
1814
1815 static struct ref *remote_refs, **remote_tail;
1816
1817 static void one_remote_ref(char *refname)
1818 {
1819 struct ref *ref;
1820 struct object *obj;
1821
1822 ref = alloc_ref(refname);
1823
1824 if (http_fetch_ref(repo->url, ref) != 0) {
1825 fprintf(stderr,
1826 "Unable to fetch ref %s from %s\n",
1827 refname, repo->url);
1828 free(ref);
1829 return;
1830 }
1831
1832 /*
1833 * Fetch a copy of the object if it doesn't exist locally - it
1834 * may be required for updating server info later.
1835 */
1836 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1837 obj = lookup_unknown_object(ref->old_sha1);
1838 if (obj) {
1839 fprintf(stderr, " fetch %s for %s\n",
1840 sha1_to_hex(ref->old_sha1), refname);
1841 add_fetch_request(obj);
1842 }
1843 }
1844
1845 *remote_tail = ref;
1846 remote_tail = &ref->next;
1847 }
1848
1849 static void get_dav_remote_heads(void)
1850 {
1851 remote_tail = &remote_refs;
1852 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1853 }
1854
1855 static int is_zero_sha1(const unsigned char *sha1)
1856 {
1857 int i;
1858
1859 for (i = 0; i < 20; i++) {
1860 if (*sha1++)
1861 return 0;
1862 }
1863 return 1;
1864 }
1865
1866 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1867 {
1868 struct strbuf *buf = (struct strbuf *)ls->userData;
1869 struct object *o;
1870 int len;
1871 char *ref_info;
1872 struct ref *ref;
1873
1874 ref = alloc_ref(ls->dentry_name);
1875
1876 if (http_fetch_ref(repo->url, ref) != 0) {
1877 fprintf(stderr,
1878 "Unable to fetch ref %s from %s\n",
1879 ls->dentry_name, repo->url);
1880 aborted = 1;
1881 free(ref);
1882 return;
1883 }
1884
1885 o = parse_object(ref->old_sha1);
1886 if (!o) {
1887 fprintf(stderr,
1888 "Unable to parse object %s for remote ref %s\n",
1889 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1890 aborted = 1;
1891 free(ref);
1892 return;
1893 }
1894
1895 len = strlen(ls->dentry_name) + 42;
1896 ref_info = xcalloc(len + 1, 1);
1897 sprintf(ref_info, "%s %s\n",
1898 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1899 fwrite_buffer(ref_info, 1, len, buf);
1900 free(ref_info);
1901
1902 if (o->type == OBJ_TAG) {
1903 o = deref_tag(o, ls->dentry_name, 0);
1904 if (o) {
1905 len = strlen(ls->dentry_name) + 45;
1906 ref_info = xcalloc(len + 1, 1);
1907 sprintf(ref_info, "%s %s^{}\n",
1908 sha1_to_hex(o->sha1), ls->dentry_name);
1909 fwrite_buffer(ref_info, 1, len, buf);
1910 free(ref_info);
1911 }
1912 }
1913 free(ref);
1914 }
1915
1916 static void update_remote_info_refs(struct remote_lock *lock)
1917 {
1918 struct buffer buffer = { STRBUF_INIT, 0 };
1919 struct active_request_slot *slot;
1920 struct slot_results results;
1921 struct curl_slist *dav_headers;
1922
1923 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1924 add_remote_info_ref, &buffer.buf);
1925 if (!aborted) {
1926 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1927
1928 slot = get_active_slot();
1929 slot->results = &results;
1930 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1931 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1932 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1933 #ifndef NO_CURL_IOCTL
1934 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1935 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1936 #endif
1937 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1938 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1939 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1940 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1941 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1942 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1943
1944 if (start_active_slot(slot)) {
1945 run_active_slot(slot);
1946 if (results.curl_result != CURLE_OK) {
1947 fprintf(stderr,
1948 "PUT error: curl result=%d, HTTP code=%ld\n",
1949 results.curl_result, results.http_code);
1950 }
1951 }
1952 }
1953 strbuf_release(&buffer.buf);
1954 }
1955
1956 static int remote_exists(const char *path)
1957 {
1958 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1959 struct active_request_slot *slot;
1960 struct slot_results results;
1961 int ret = -1;
1962
1963 sprintf(url, "%s%s", repo->url, path);
1964
1965 slot = get_active_slot();
1966 slot->results = &results;
1967 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1968 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1969
1970 if (start_active_slot(slot)) {
1971 run_active_slot(slot);
1972 if (results.http_code == 404)
1973 ret = 0;
1974 else if (results.curl_result == CURLE_OK)
1975 ret = 1;
1976 else
1977 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1978 } else {
1979 fprintf(stderr, "Unable to start HEAD request\n");
1980 }
1981
1982 free(url);
1983 return ret;
1984 }
1985
1986 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1987 {
1988 char *url;
1989 struct strbuf buffer = STRBUF_INIT;
1990 struct active_request_slot *slot;
1991 struct slot_results results;
1992
1993 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1994 sprintf(url, "%s%s", repo->url, path);
1995
1996 slot = get_active_slot();
1997 slot->results = &results;
1998 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1999 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2000 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2001 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2002 if (start_active_slot(slot)) {
2003 run_active_slot(slot);
2004 if (results.curl_result != CURLE_OK) {
2005 die("Couldn't get %s for remote symref\n%s",
2006 url, curl_errorstr);
2007 }
2008 } else {
2009 die("Unable to start remote symref request");
2010 }
2011 free(url);
2012
2013 free(*symref);
2014 *symref = NULL;
2015 hashclr(sha1);
2016
2017 if (buffer.len == 0)
2018 return;
2019
2020 /* If it's a symref, set the refname; otherwise try for a sha1 */
2021 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2022 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2023 } else {
2024 get_sha1_hex(buffer.buf, sha1);
2025 }
2026
2027 strbuf_release(&buffer);
2028 }
2029
2030 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2031 {
2032 struct commit *head = lookup_commit(head_sha1);
2033 struct commit *branch = lookup_commit(branch_sha1);
2034 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2035
2036 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2037 }
2038
2039 static int delete_remote_branch(char *pattern, int force)
2040 {
2041 struct ref *refs = remote_refs;
2042 struct ref *remote_ref = NULL;
2043 unsigned char head_sha1[20];
2044 char *symref = NULL;
2045 int match;
2046 int patlen = strlen(pattern);
2047 int i;
2048 struct active_request_slot *slot;
2049 struct slot_results results;
2050 char *url;
2051
2052 /* Find the remote branch(es) matching the specified branch name */
2053 for (match = 0; refs; refs = refs->next) {
2054 char *name = refs->name;
2055 int namelen = strlen(name);
2056 if (namelen < patlen ||
2057 memcmp(name + namelen - patlen, pattern, patlen))
2058 continue;
2059 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2060 continue;
2061 match++;
2062 remote_ref = refs;
2063 }
2064 if (match == 0)
2065 return error("No remote branch matches %s", pattern);
2066 if (match != 1)
2067 return error("More than one remote branch matches %s",
2068 pattern);
2069
2070 /*
2071 * Remote HEAD must be a symref (not exactly foolproof; a remote
2072 * symlink to a symref will look like a symref)
2073 */
2074 fetch_symref("HEAD", &symref, head_sha1);
2075 if (!symref)
2076 return error("Remote HEAD is not a symref");
2077
2078 /* Remote branch must not be the remote HEAD */
2079 for (i=0; symref && i<MAXDEPTH; i++) {
2080 if (!strcmp(remote_ref->name, symref))
2081 return error("Remote branch %s is the current HEAD",
2082 remote_ref->name);
2083 fetch_symref(symref, &symref, head_sha1);
2084 }
2085
2086 /* Run extra sanity checks if delete is not forced */
2087 if (!force) {
2088 /* Remote HEAD must resolve to a known object */
2089 if (symref)
2090 return error("Remote HEAD symrefs too deep");
2091 if (is_zero_sha1(head_sha1))
2092 return error("Unable to resolve remote HEAD");
2093 if (!has_sha1_file(head_sha1))
2094 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2095
2096 /* Remote branch must resolve to a known object */
2097 if (is_zero_sha1(remote_ref->old_sha1))
2098 return error("Unable to resolve remote branch %s",
2099 remote_ref->name);
2100 if (!has_sha1_file(remote_ref->old_sha1))
2101 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));
2102
2103 /* Remote branch must be an ancestor of remote HEAD */
2104 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2105 return error("The branch '%s' is not an ancestor "
2106 "of your current HEAD.\n"
2107 "If you are sure you want to delete it,"
2108 " run:\n\t'git http-push -D %s %s'",
2109 remote_ref->name, repo->url, pattern);
2110 }
2111 }
2112
2113 /* Send delete request */
2114 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2115 if (dry_run)
2116 return 0;
2117 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2118 sprintf(url, "%s%s", repo->url, remote_ref->name);
2119 slot = get_active_slot();
2120 slot->results = &results;
2121 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2122 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2123 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2124 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2125 if (start_active_slot(slot)) {
2126 run_active_slot(slot);
2127 free(url);
2128 if (results.curl_result != CURLE_OK)
2129 return error("DELETE request failed (%d/%ld)\n",
2130 results.curl_result, results.http_code);
2131 } else {
2132 free(url);
2133 return error("Unable to start DELETE request");
2134 }
2135
2136 return 0;
2137 }
2138
2139 int main(int argc, char **argv)
2140 {
2141 struct transfer_request *request;
2142 struct transfer_request *next_request;
2143 int nr_refspec = 0;
2144 char **refspec = NULL;
2145 struct remote_lock *ref_lock = NULL;
2146 struct remote_lock *info_ref_lock = NULL;
2147 struct rev_info revs;
2148 int delete_branch = 0;
2149 int force_delete = 0;
2150 int objects_to_send;
2151 int rc = 0;
2152 int i;
2153 int new_refs;
2154 struct ref *ref, *local_refs;
2155 struct remote *remote;
2156 char *rewritten_url = NULL;
2157
2158 git_extract_argv0_path(argv[0]);
2159
2160 setup_git_directory();
2161
2162 repo = xcalloc(sizeof(*repo), 1);
2163
2164 argv++;
2165 for (i = 1; i < argc; i++, argv++) {
2166 char *arg = *argv;
2167
2168 if (*arg == '-') {
2169 if (!strcmp(arg, "--all")) {
2170 push_all = MATCH_REFS_ALL;
2171 continue;
2172 }
2173 if (!strcmp(arg, "--force")) {
2174 force_all = 1;
2175 continue;
2176 }
2177 if (!strcmp(arg, "--dry-run")) {
2178 dry_run = 1;
2179 continue;
2180 }
2181 if (!strcmp(arg, "--verbose")) {
2182 push_verbosely = 1;
2183 continue;
2184 }
2185 if (!strcmp(arg, "-d")) {
2186 delete_branch = 1;
2187 continue;
2188 }
2189 if (!strcmp(arg, "-D")) {
2190 delete_branch = 1;
2191 force_delete = 1;
2192 continue;
2193 }
2194 }
2195 if (!repo->url) {
2196 char *path = strstr(arg, "//");
2197 repo->url = arg;
2198 repo->path_len = strlen(arg);
2199 if (path) {
2200 repo->path = strchr(path+2, '/');
2201 if (repo->path)
2202 repo->path_len = strlen(repo->path);
2203 }
2204 continue;
2205 }
2206 refspec = argv;
2207 nr_refspec = argc - i;
2208 break;
2209 }
2210
2211 #ifndef USE_CURL_MULTI
2212 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2213 #endif
2214
2215 if (!repo->url)
2216 usage(http_push_usage);
2217
2218 if (delete_branch && nr_refspec != 1)
2219 die("You must specify only one branch name when deleting a remote branch");
2220
2221 memset(remote_dir_exists, -1, 256);
2222
2223 /*
2224 * Create a minimum remote by hand to give to http_init(),
2225 * primarily to allow it to look at the URL.
2226 */
2227 remote = xcalloc(sizeof(*remote), 1);
2228 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2229 remote->url[remote->url_nr++] = repo->url;
2230 http_init(remote);
2231
2232 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2233
2234 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2235 rewritten_url = xmalloc(strlen(repo->url)+2);
2236 strcpy(rewritten_url, repo->url);
2237 strcat(rewritten_url, "/");
2238 repo->path = rewritten_url + (repo->path - repo->url);
2239 repo->path_len++;
2240 repo->url = rewritten_url;
2241 }
2242
2243 /* Verify DAV compliance/lock support */
2244 if (!locking_available()) {
2245 rc = 1;
2246 goto cleanup;
2247 }
2248
2249 sigchain_push_common(remove_locks_on_signal);
2250
2251 /* Check whether the remote has server info files */
2252 repo->can_update_info_refs = 0;
2253 repo->has_info_refs = remote_exists("info/refs");
2254 repo->has_info_packs = remote_exists("objects/info/packs");
2255 if (repo->has_info_refs) {
2256 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2257 if (info_ref_lock)
2258 repo->can_update_info_refs = 1;
2259 else {
2260 error("cannot lock existing info/refs");
2261 rc = 1;
2262 goto cleanup;
2263 }
2264 }
2265 if (repo->has_info_packs)
2266 fetch_indices();
2267
2268 /* Get a list of all local and remote heads to validate refspecs */
2269 local_refs = get_local_heads();
2270 fprintf(stderr, "Fetching remote heads...\n");
2271 get_dav_remote_heads();
2272
2273 /* Remove a remote branch if -d or -D was specified */
2274 if (delete_branch) {
2275 if (delete_remote_branch(refspec[0], force_delete) == -1)
2276 fprintf(stderr, "Unable to delete remote branch %s\n",
2277 refspec[0]);
2278 goto cleanup;
2279 }
2280
2281 /* match them up */
2282 if (!remote_tail)
2283 remote_tail = &remote_refs;
2284 if (match_refs(local_refs, remote_refs, &remote_tail,
2285 nr_refspec, (const char **) refspec, push_all)) {
2286 rc = -1;
2287 goto cleanup;
2288 }
2289 if (!remote_refs) {
2290 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2291 rc = 0;
2292 goto cleanup;
2293 }
2294
2295 new_refs = 0;
2296 for (ref = remote_refs; ref; ref = ref->next) {
2297 char old_hex[60], *new_hex;
2298 const char *commit_argv[4];
2299 int commit_argc;
2300 char *new_sha1_hex, *old_sha1_hex;
2301
2302 if (!ref->peer_ref)
2303 continue;
2304
2305 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2306 if (delete_remote_branch(ref->name, 1) == -1) {
2307 error("Could not remove %s", ref->name);
2308 rc = -4;
2309 }
2310 new_refs++;
2311 continue;
2312 }
2313
2314 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2315 if (push_verbosely || 1)
2316 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2317 continue;
2318 }
2319
2320 if (!force_all &&
2321 !is_zero_sha1(ref->old_sha1) &&
2322 !ref->force) {
2323 if (!has_sha1_file(ref->old_sha1) ||
2324 !ref_newer(ref->peer_ref->new_sha1,
2325 ref->old_sha1)) {
2326 /*
2327 * We do not have the remote ref, or
2328 * we know that the remote ref is not
2329 * an ancestor of what we are trying to
2330 * push. Either way this can be losing
2331 * commits at the remote end and likely
2332 * we were not up to date to begin with.
2333 */
2334 error("remote '%s' is not an ancestor of\n"
2335 "local '%s'.\n"
2336 "Maybe you are not up-to-date and "
2337 "need to pull first?",
2338 ref->name,
2339 ref->peer_ref->name);
2340 rc = -2;
2341 continue;
2342 }
2343 }
2344 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2345 new_refs++;
2346 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2347 new_hex = sha1_to_hex(ref->new_sha1);
2348
2349 fprintf(stderr, "updating '%s'", ref->name);
2350 if (strcmp(ref->name, ref->peer_ref->name))
2351 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2352 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2353 if (dry_run)
2354 continue;
2355
2356 /* Lock remote branch ref */
2357 ref_lock = lock_remote(ref->name, LOCK_TIME);
2358 if (ref_lock == NULL) {
2359 fprintf(stderr, "Unable to lock remote branch %s\n",
2360 ref->name);
2361 rc = 1;
2362 continue;
2363 }
2364
2365 /* Set up revision info for this refspec */
2366 commit_argc = 3;
2367 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2368 old_sha1_hex = NULL;
2369 commit_argv[1] = "--objects";
2370 commit_argv[2] = new_sha1_hex;
2371 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2372 old_sha1_hex = xmalloc(42);
2373 sprintf(old_sha1_hex, "^%s",
2374 sha1_to_hex(ref->old_sha1));
2375 commit_argv[3] = old_sha1_hex;
2376 commit_argc++;
2377 }
2378 init_revisions(&revs, setup_git_directory());
2379 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2380 revs.edge_hint = 0; /* just in case */
2381 free(new_sha1_hex);
2382 if (old_sha1_hex) {
2383 free(old_sha1_hex);
2384 commit_argv[1] = NULL;
2385 }
2386
2387 /* Generate a list of objects that need to be pushed */
2388 pushing = 0;
2389 if (prepare_revision_walk(&revs))
2390 die("revision walk setup failed");
2391 mark_edges_uninteresting(revs.commits, &revs, NULL);
2392 objects_to_send = get_delta(&revs, ref_lock);
2393 finish_all_active_slots();
2394
2395 /* Push missing objects to remote, this would be a
2396 convenient time to pack them first if appropriate. */
2397 pushing = 1;
2398 if (objects_to_send)
2399 fprintf(stderr, " sending %d objects\n",
2400 objects_to_send);
2401 #ifdef USE_CURL_MULTI
2402 fill_active_slots();
2403 add_fill_function(NULL, fill_active_slot);
2404 #endif
2405 do {
2406 finish_all_active_slots();
2407 #ifdef USE_CURL_MULTI
2408 fill_active_slots();
2409 #endif
2410 } while (request_queue_head && !aborted);
2411
2412 /* Update the remote branch if all went well */
2413 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2414 rc = 1;
2415
2416 if (!rc)
2417 fprintf(stderr, " done\n");
2418 unlock_remote(ref_lock);
2419 check_locks();
2420 }
2421
2422 /* Update remote server info if appropriate */
2423 if (repo->has_info_refs && new_refs) {
2424 if (info_ref_lock && repo->can_update_info_refs) {
2425 fprintf(stderr, "Updating remote server info\n");
2426 if (!dry_run)
2427 update_remote_info_refs(info_ref_lock);
2428 } else {
2429 fprintf(stderr, "Unable to update server info\n");
2430 }
2431 }
2432
2433 cleanup:
2434 free(rewritten_url);
2435 if (info_ref_lock)
2436 unlock_remote(info_ref_lock);
2437 free(repo);
2438
2439 curl_slist_free_all(no_pragma_header);
2440
2441 http_cleanup();
2442
2443 request = request_queue_head;
2444 while (request != NULL) {
2445 next_request = request->next;
2446 release_request(request);
2447 request = next_request;
2448 }
2449
2450 return rc;
2451 }
Dscho's miscellaneous git branches