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commit: add function to unparse a commit and its parents
[git/jnareb-git.git] / http-push.c
blob5138224cc372482fb60afd350fa40e37d019f367
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(prevfile);
319 rename(request->tmpfile, prevfile);
320 unlink(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 /* This could have failed due to the "lazy directory creation";
327 * try to mkdir the last path component.
328 */
329 if (request->local_fileno < 0 && errno == ENOENT) {
330 char *dir = strrchr(request->tmpfile, '/');
331 if (dir) {
332 *dir = 0;
333 mkdir(request->tmpfile, 0777);
334 *dir = '/';
335 }
336 request->local_fileno = open(request->tmpfile,
337 O_WRONLY | O_CREAT | O_EXCL, 0666);
338 }
339
340 if (request->local_fileno < 0) {
341 request->state = ABORTED;
342 error("Couldn't create temporary file %s for %s: %s",
343 request->tmpfile, request->filename, strerror(errno));
344 return;
345 }
346
347 memset(&request->stream, 0, sizeof(request->stream));
348
349 git_inflate_init(&request->stream);
350
351 git_SHA1_Init(&request->c);
352
353 url = get_remote_object_url(repo->url, hex, 0);
354 request->url = xstrdup(url);
355
356 /* If a previous temp file is present, process what was already
357 fetched. */
358 prevlocal = open(prevfile, O_RDONLY);
359 if (prevlocal != -1) {
360 do {
361 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
362 if (prev_read>0) {
363 if (fwrite_sha1_file(prev_buf,
364 1,
365 prev_read,
366 request) == prev_read) {
367 prev_posn += prev_read;
368 } else {
369 prev_read = -1;
370 }
371 }
372 } while (prev_read > 0);
373 close(prevlocal);
374 }
375 unlink(prevfile);
376
377 /* Reset inflate/SHA1 if there was an error reading the previous temp
378 file; also rewind to the beginning of the local file. */
379 if (prev_read == -1) {
380 memset(&request->stream, 0, sizeof(request->stream));
381 git_inflate_init(&request->stream);
382 git_SHA1_Init(&request->c);
383 if (prev_posn>0) {
384 prev_posn = 0;
385 lseek(request->local_fileno, 0, SEEK_SET);
386 ftruncate(request->local_fileno, 0);
387 }
388 }
389
390 slot = get_active_slot();
391 slot->callback_func = process_response;
392 slot->callback_data = request;
393 request->slot = slot;
394
395 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
396 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
397 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
398 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
399 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
400
401 /* If we have successfully processed data from a previous fetch
402 attempt, only fetch the data we don't already have. */
403 if (prev_posn>0) {
404 if (push_verbosely)
405 fprintf(stderr,
406 "Resuming fetch of object %s at byte %ld\n",
407 hex, prev_posn);
408 sprintf(range, "Range: bytes=%ld-", prev_posn);
409 range_header = curl_slist_append(range_header, range);
410 curl_easy_setopt(slot->curl,
411 CURLOPT_HTTPHEADER, range_header);
412 }
413
414 /* Try to get the request started, abort the request on error */
415 request->state = RUN_FETCH_LOOSE;
416 if (!start_active_slot(slot)) {
417 fprintf(stderr, "Unable to start GET request\n");
418 repo->can_update_info_refs = 0;
419 release_request(request);
420 }
421 }
422
423 static void start_mkcol(struct transfer_request *request)
424 {
425 char *hex = sha1_to_hex(request->obj->sha1);
426 struct active_request_slot *slot;
427
428 request->url = get_remote_object_url(repo->url, hex, 1);
429
430 slot = get_active_slot();
431 slot->callback_func = process_response;
432 slot->callback_data = request;
433 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
434 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
435 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
436 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
437 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
438
439 if (start_active_slot(slot)) {
440 request->slot = slot;
441 request->state = RUN_MKCOL;
442 } else {
443 request->state = ABORTED;
444 free(request->url);
445 request->url = NULL;
446 }
447 }
448 #endif
449
450 static void start_fetch_packed(struct transfer_request *request)
451 {
452 char *url;
453 struct packed_git *target;
454 FILE *packfile;
455 char *filename;
456 long prev_posn = 0;
457 char range[RANGE_HEADER_SIZE];
458 struct curl_slist *range_header = NULL;
459
460 struct transfer_request *check_request = request_queue_head;
461 struct active_request_slot *slot;
462
463 target = find_sha1_pack(request->obj->sha1, repo->packs);
464 if (!target) {
465 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
466 repo->can_update_info_refs = 0;
467 release_request(request);
468 return;
469 }
470
471 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
472 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
473
474 filename = sha1_pack_name(target->sha1);
475 snprintf(request->filename, sizeof(request->filename), "%s", filename);
476 snprintf(request->tmpfile, sizeof(request->tmpfile),
477 "%s.temp", filename);
478
479 url = xmalloc(strlen(repo->url) + 64);
480 sprintf(url, "%sobjects/pack/pack-%s.pack",
481 repo->url, sha1_to_hex(target->sha1));
482
483 /* Make sure there isn't another open request for this pack */
484 while (check_request) {
485 if (check_request->state == RUN_FETCH_PACKED &&
486 !strcmp(check_request->url, url)) {
487 free(url);
488 release_request(request);
489 return;
490 }
491 check_request = check_request->next;
492 }
493
494 packfile = fopen(request->tmpfile, "a");
495 if (!packfile) {
496 fprintf(stderr, "Unable to open local file %s for pack",
497 request->tmpfile);
498 repo->can_update_info_refs = 0;
499 free(url);
500 return;
501 }
502
503 slot = get_active_slot();
504 slot->callback_func = process_response;
505 slot->callback_data = request;
506 request->slot = slot;
507 request->local_stream = packfile;
508 request->userData = target;
509
510 request->url = url;
511 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
512 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
513 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
514 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
515 slot->local = packfile;
516
517 /* If there is data present from a previous transfer attempt,
518 resume where it left off */
519 prev_posn = ftell(packfile);
520 if (prev_posn>0) {
521 if (push_verbosely)
522 fprintf(stderr,
523 "Resuming fetch of pack %s at byte %ld\n",
524 sha1_to_hex(target->sha1), prev_posn);
525 sprintf(range, "Range: bytes=%ld-", prev_posn);
526 range_header = curl_slist_append(range_header, range);
527 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
528 }
529
530 /* Try to get the request started, abort the request on error */
531 request->state = RUN_FETCH_PACKED;
532 if (!start_active_slot(slot)) {
533 fprintf(stderr, "Unable to start GET request\n");
534 repo->can_update_info_refs = 0;
535 release_request(request);
536 }
537 }
538
539 static void start_put(struct transfer_request *request)
540 {
541 char *hex = sha1_to_hex(request->obj->sha1);
542 struct active_request_slot *slot;
543 struct strbuf buf = STRBUF_INIT;
544 enum object_type type;
545 char hdr[50];
546 void *unpacked;
547 unsigned long len;
548 int hdrlen;
549 ssize_t size;
550 z_stream stream;
551
552 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
553 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
554
555 /* Set it up */
556 memset(&stream, 0, sizeof(stream));
557 deflateInit(&stream, zlib_compression_level);
558 size = deflateBound(&stream, len + hdrlen);
559 strbuf_init(&request->buffer.buf, size);
560 request->buffer.posn = 0;
561
562 /* Compress it */
563 stream.next_out = (unsigned char *)request->buffer.buf.buf;
564 stream.avail_out = size;
565
566 /* First header.. */
567 stream.next_in = (void *)hdr;
568 stream.avail_in = hdrlen;
569 while (deflate(&stream, 0) == Z_OK)
570 /* nothing */;
571
572 /* Then the data itself.. */
573 stream.next_in = unpacked;
574 stream.avail_in = len;
575 while (deflate(&stream, Z_FINISH) == Z_OK)
576 /* nothing */;
577 deflateEnd(&stream);
578 free(unpacked);
579
580 request->buffer.buf.len = stream.total_out;
581
582 strbuf_addstr(&buf, "Destination: ");
583 append_remote_object_url(&buf, repo->url, hex, 0);
584 request->dest = strbuf_detach(&buf, NULL);
585
586 append_remote_object_url(&buf, repo->url, hex, 0);
587 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
588 request->url = strbuf_detach(&buf, NULL);
589
590 slot = get_active_slot();
591 slot->callback_func = process_response;
592 slot->callback_data = request;
593 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
594 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
595 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
596 #ifndef NO_CURL_IOCTL
597 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
598 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
599 #endif
600 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
601 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
602 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
603 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
604 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
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_PUT;
610 } else {
611 request->state = ABORTED;
612 free(request->url);
613 request->url = NULL;
614 }
615 }
616
617 static void start_move(struct transfer_request *request)
618 {
619 struct active_request_slot *slot;
620 struct curl_slist *dav_headers = NULL;
621
622 slot = get_active_slot();
623 slot->callback_func = process_response;
624 slot->callback_data = request;
625 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
626 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
627 dav_headers = curl_slist_append(dav_headers, request->dest);
628 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
629 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
630 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
631 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
632
633 if (start_active_slot(slot)) {
634 request->slot = slot;
635 request->state = RUN_MOVE;
636 } else {
637 request->state = ABORTED;
638 free(request->url);
639 request->url = NULL;
640 }
641 }
642
643 static int refresh_lock(struct remote_lock *lock)
644 {
645 struct active_request_slot *slot;
646 struct slot_results results;
647 struct curl_slist *dav_headers;
648 int rc = 0;
649
650 lock->refreshing = 1;
651
652 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
653
654 slot = get_active_slot();
655 slot->results = &results;
656 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
657 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
658 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
659 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
660 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
661
662 if (start_active_slot(slot)) {
663 run_active_slot(slot);
664 if (results.curl_result != CURLE_OK) {
665 fprintf(stderr, "LOCK HTTP error %ld\n",
666 results.http_code);
667 } else {
668 lock->start_time = time(NULL);
669 rc = 1;
670 }
671 }
672
673 lock->refreshing = 0;
674 curl_slist_free_all(dav_headers);
675
676 return rc;
677 }
678
679 static void check_locks(void)
680 {
681 struct remote_lock *lock = repo->locks;
682 time_t current_time = time(NULL);
683 int time_remaining;
684
685 while (lock) {
686 time_remaining = lock->start_time + lock->timeout -
687 current_time;
688 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
689 if (!refresh_lock(lock)) {
690 fprintf(stderr,
691 "Unable to refresh lock for %s\n",
692 lock->url);
693 aborted = 1;
694 return;
695 }
696 }
697 lock = lock->next;
698 }
699 }
700
701 static void release_request(struct transfer_request *request)
702 {
703 struct transfer_request *entry = request_queue_head;
704
705 if (request == request_queue_head) {
706 request_queue_head = request->next;
707 } else {
708 while (entry->next != NULL && entry->next != request)
709 entry = entry->next;
710 if (entry->next == request)
711 entry->next = entry->next->next;
712 }
713
714 if (request->local_fileno != -1)
715 close(request->local_fileno);
716 if (request->local_stream)
717 fclose(request->local_stream);
718 free(request->url);
719 free(request);
720 }
721
722 static void finish_request(struct transfer_request *request)
723 {
724 struct stat st;
725 struct packed_git *target;
726 struct packed_git **lst;
727
728 request->curl_result = request->slot->curl_result;
729 request->http_code = request->slot->http_code;
730 request->slot = NULL;
731
732 /* Keep locks active */
733 check_locks();
734
735 if (request->headers != NULL)
736 curl_slist_free_all(request->headers);
737
738 /* URL is reused for MOVE after PUT */
739 if (request->state != RUN_PUT) {
740 free(request->url);
741 request->url = NULL;
742 }
743
744 if (request->state == RUN_MKCOL) {
745 if (request->curl_result == CURLE_OK ||
746 request->http_code == 405) {
747 remote_dir_exists[request->obj->sha1[0]] = 1;
748 start_put(request);
749 } else {
750 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
751 sha1_to_hex(request->obj->sha1),
752 request->curl_result, request->http_code);
753 request->state = ABORTED;
754 aborted = 1;
755 }
756 } else if (request->state == RUN_PUT) {
757 if (request->curl_result == CURLE_OK) {
758 start_move(request);
759 } else {
760 fprintf(stderr, "PUT %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_MOVE) {
767 if (request->curl_result == CURLE_OK) {
768 if (push_verbosely)
769 fprintf(stderr, " sent %s\n",
770 sha1_to_hex(request->obj->sha1));
771 request->obj->flags |= REMOTE;
772 release_request(request);
773 } else {
774 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
775 sha1_to_hex(request->obj->sha1),
776 request->curl_result, request->http_code);
777 request->state = ABORTED;
778 aborted = 1;
779 }
780 } else if (request->state == RUN_FETCH_LOOSE) {
781 close(request->local_fileno); request->local_fileno = -1;
782
783 if (request->curl_result != CURLE_OK &&
784 request->http_code != 416) {
785 if (stat(request->tmpfile, &st) == 0) {
786 if (st.st_size == 0)
787 unlink(request->tmpfile);
788 }
789 } else {
790 if (request->http_code == 416)
791 warning("requested range invalid; we may already have all the data.");
792
793 git_inflate_end(&request->stream);
794 git_SHA1_Final(request->real_sha1, &request->c);
795 if (request->zret != Z_STREAM_END) {
796 unlink(request->tmpfile);
797 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
798 unlink(request->tmpfile);
799 } else {
800 request->rename =
801 move_temp_to_file(
802 request->tmpfile,
803 request->filename);
804 if (request->rename == 0) {
805 request->obj->flags |= (LOCAL | REMOTE);
806 }
807 }
808 }
809
810 /* Try fetching packed if necessary */
811 if (request->obj->flags & LOCAL)
812 release_request(request);
813 else
814 start_fetch_packed(request);
815
816 } else if (request->state == RUN_FETCH_PACKED) {
817 if (request->curl_result != CURLE_OK) {
818 fprintf(stderr, "Unable to get pack file %s\n%s",
819 request->url, curl_errorstr);
820 repo->can_update_info_refs = 0;
821 } else {
822 off_t pack_size = ftell(request->local_stream);
823
824 fclose(request->local_stream);
825 request->local_stream = NULL;
826 if (!move_temp_to_file(request->tmpfile,
827 request->filename)) {
828 target = (struct packed_git *)request->userData;
829 target->pack_size = pack_size;
830 lst = &repo->packs;
831 while (*lst != target)
832 lst = &((*lst)->next);
833 *lst = (*lst)->next;
834
835 if (!verify_pack(target))
836 install_packed_git(target);
837 else
838 repo->can_update_info_refs = 0;
839 }
840 }
841 release_request(request);
842 }
843 }
844
845 #ifdef USE_CURL_MULTI
846 static int fill_active_slot(void *unused)
847 {
848 struct transfer_request *request;
849
850 if (aborted)
851 return 0;
852
853 for (request = request_queue_head; request; request = request->next) {
854 if (request->state == NEED_FETCH) {
855 start_fetch_loose(request);
856 return 1;
857 } else if (pushing && request->state == NEED_PUSH) {
858 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
859 start_put(request);
860 } else {
861 start_mkcol(request);
862 }
863 return 1;
864 }
865 }
866 return 0;
867 }
868 #endif
869
870 static void get_remote_object_list(unsigned char parent);
871
872 static void add_fetch_request(struct object *obj)
873 {
874 struct transfer_request *request;
875
876 check_locks();
877
878 /*
879 * Don't fetch the object if it's known to exist locally
880 * or is already in the request queue
881 */
882 if (remote_dir_exists[obj->sha1[0]] == -1)
883 get_remote_object_list(obj->sha1[0]);
884 if (obj->flags & (LOCAL | FETCHING))
885 return;
886
887 obj->flags |= FETCHING;
888 request = xmalloc(sizeof(*request));
889 request->obj = obj;
890 request->url = NULL;
891 request->lock = NULL;
892 request->headers = NULL;
893 request->local_fileno = -1;
894 request->local_stream = NULL;
895 request->state = NEED_FETCH;
896 request->next = request_queue_head;
897 request_queue_head = request;
898
899 #ifdef USE_CURL_MULTI
900 fill_active_slots();
901 step_active_slots();
902 #endif
903 }
904
905 static int add_send_request(struct object *obj, struct remote_lock *lock)
906 {
907 struct transfer_request *request = request_queue_head;
908 struct packed_git *target;
909
910 /* Keep locks active */
911 check_locks();
912
913 /*
914 * Don't push the object if it's known to exist on the remote
915 * or is already in the request queue
916 */
917 if (remote_dir_exists[obj->sha1[0]] == -1)
918 get_remote_object_list(obj->sha1[0]);
919 if (obj->flags & (REMOTE | PUSHING))
920 return 0;
921 target = find_sha1_pack(obj->sha1, repo->packs);
922 if (target) {
923 obj->flags |= REMOTE;
924 return 0;
925 }
926
927 obj->flags |= PUSHING;
928 request = xmalloc(sizeof(*request));
929 request->obj = obj;
930 request->url = NULL;
931 request->lock = lock;
932 request->headers = NULL;
933 request->local_fileno = -1;
934 request->local_stream = NULL;
935 request->state = NEED_PUSH;
936 request->next = request_queue_head;
937 request_queue_head = request;
938
939 #ifdef USE_CURL_MULTI
940 fill_active_slots();
941 step_active_slots();
942 #endif
943
944 return 1;
945 }
946
947 static int fetch_index(unsigned char *sha1)
948 {
949 char *hex = sha1_to_hex(sha1);
950 char *filename;
951 char *url;
952 char tmpfile[PATH_MAX];
953 long prev_posn = 0;
954 char range[RANGE_HEADER_SIZE];
955 struct curl_slist *range_header = NULL;
956
957 FILE *indexfile;
958 struct active_request_slot *slot;
959 struct slot_results results;
960
961 /* Don't use the index if the pack isn't there */
962 url = xmalloc(strlen(repo->url) + 64);
963 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
964 slot = get_active_slot();
965 slot->results = &results;
966 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
967 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
968 if (start_active_slot(slot)) {
969 run_active_slot(slot);
970 if (results.curl_result != CURLE_OK) {
971 free(url);
972 return error("Unable to verify pack %s is available",
973 hex);
974 }
975 } else {
976 free(url);
977 return error("Unable to start request");
978 }
979
980 if (has_pack_index(sha1)) {
981 free(url);
982 return 0;
983 }
984
985 if (push_verbosely)
986 fprintf(stderr, "Getting index for pack %s\n", hex);
987
988 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
989
990 filename = sha1_pack_index_name(sha1);
991 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
992 indexfile = fopen(tmpfile, "a");
993 if (!indexfile) {
994 free(url);
995 return error("Unable to open local file %s for pack index",
996 tmpfile);
997 }
998
999 slot = get_active_slot();
1000 slot->results = &results;
1001 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1002 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1003 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
1004 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1005 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1006 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1007 slot->local = indexfile;
1008
1009 /* If there is data present from a previous transfer attempt,
1010 resume where it left off */
1011 prev_posn = ftell(indexfile);
1012 if (prev_posn>0) {
1013 if (push_verbosely)
1014 fprintf(stderr,
1015 "Resuming fetch of index for pack %s at byte %ld\n",
1016 hex, prev_posn);
1017 sprintf(range, "Range: bytes=%ld-", prev_posn);
1018 range_header = curl_slist_append(range_header, range);
1019 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
1020 }
1021
1022 if (start_active_slot(slot)) {
1023 run_active_slot(slot);
1024 if (results.curl_result != CURLE_OK) {
1025 free(url);
1026 fclose(indexfile);
1027 return error("Unable to get pack index %s\n%s", url,
1028 curl_errorstr);
1029 }
1030 } else {
1031 free(url);
1032 fclose(indexfile);
1033 return error("Unable to start request");
1034 }
1035
1036 free(url);
1037 fclose(indexfile);
1038
1039 return move_temp_to_file(tmpfile, filename);
1040 }
1041
1042 static int setup_index(unsigned char *sha1)
1043 {
1044 struct packed_git *new_pack;
1045
1046 if (fetch_index(sha1))
1047 return -1;
1048
1049 new_pack = parse_pack_index(sha1);
1050 new_pack->next = repo->packs;
1051 repo->packs = new_pack;
1052 return 0;
1053 }
1054
1055 static int fetch_indices(void)
1056 {
1057 unsigned char sha1[20];
1058 char *url;
1059 struct strbuf buffer = STRBUF_INIT;
1060 char *data;
1061 int i = 0;
1062
1063 struct active_request_slot *slot;
1064 struct slot_results results;
1065
1066 if (push_verbosely)
1067 fprintf(stderr, "Getting pack list\n");
1068
1069 url = xmalloc(strlen(repo->url) + 20);
1070 sprintf(url, "%sobjects/info/packs", repo->url);
1071
1072 slot = get_active_slot();
1073 slot->results = &results;
1074 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1075 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1076 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1077 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1078 if (start_active_slot(slot)) {
1079 run_active_slot(slot);
1080 if (results.curl_result != CURLE_OK) {
1081 strbuf_release(&buffer);
1082 free(url);
1083 if (results.http_code == 404)
1084 return 0;
1085 else
1086 return error("%s", curl_errorstr);
1087 }
1088 } else {
1089 strbuf_release(&buffer);
1090 free(url);
1091 return error("Unable to start request");
1092 }
1093 free(url);
1094
1095 data = buffer.buf;
1096 while (i < buffer.len) {
1097 switch (data[i]) {
1098 case 'P':
1099 i++;
1100 if (i + 52 < buffer.len &&
1101 !prefixcmp(data + i, " pack-") &&
1102 !prefixcmp(data + i + 46, ".pack\n")) {
1103 get_sha1_hex(data + i + 6, sha1);
1104 setup_index(sha1);
1105 i += 51;
1106 break;
1107 }
1108 default:
1109 while (data[i] != '\n')
1110 i++;
1111 }
1112 i++;
1113 }
1114
1115 strbuf_release(&buffer);
1116 return 0;
1117 }
1118
1119 static void one_remote_object(const char *hex)
1120 {
1121 unsigned char sha1[20];
1122 struct object *obj;
1123
1124 if (get_sha1_hex(hex, sha1) != 0)
1125 return;
1126
1127 obj = lookup_object(sha1);
1128 if (!obj)
1129 obj = parse_object(sha1);
1130
1131 /* Ignore remote objects that don't exist locally */
1132 if (!obj)
1133 return;
1134
1135 obj->flags |= REMOTE;
1136 if (!object_list_contains(objects, obj))
1137 object_list_insert(obj, &objects);
1138 }
1139
1140 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1141 {
1142 int *lock_flags = (int *)ctx->userData;
1143
1144 if (tag_closed) {
1145 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1146 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1147 (*lock_flags & DAV_PROP_LOCKWR)) {
1148 *lock_flags |= DAV_LOCK_OK;
1149 }
1150 *lock_flags &= DAV_LOCK_OK;
1151 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1152 *lock_flags |= DAV_PROP_LOCKWR;
1153 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1154 *lock_flags |= DAV_PROP_LOCKEX;
1155 }
1156 }
1157 }
1158
1159 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1160 {
1161 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1162 git_SHA_CTX sha_ctx;
1163 unsigned char lock_token_sha1[20];
1164
1165 if (tag_closed && ctx->cdata) {
1166 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1167 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1168 strcpy(lock->owner, ctx->cdata);
1169 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1170 if (!prefixcmp(ctx->cdata, "Second-"))
1171 lock->timeout =
1172 strtol(ctx->cdata + 7, NULL, 10);
1173 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1174 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1175 strcpy(lock->token, ctx->cdata);
1176
1177 git_SHA1_Init(&sha_ctx);
1178 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1179 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1180
1181 lock->tmpfile_suffix[0] = '_';
1182 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1183 }
1184 }
1185 }
1186
1187 static void one_remote_ref(char *refname);
1188
1189 static void
1190 xml_start_tag(void *userData, const char *name, const char **atts)
1191 {
1192 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1193 const char *c = strchr(name, ':');
1194 int new_len;
1195
1196 if (c == NULL)
1197 c = name;
1198 else
1199 c++;
1200
1201 new_len = strlen(ctx->name) + strlen(c) + 2;
1202
1203 if (new_len > ctx->len) {
1204 ctx->name = xrealloc(ctx->name, new_len);
1205 ctx->len = new_len;
1206 }
1207 strcat(ctx->name, ".");
1208 strcat(ctx->name, c);
1209
1210 free(ctx->cdata);
1211 ctx->cdata = NULL;
1212
1213 ctx->userFunc(ctx, 0);
1214 }
1215
1216 static void
1217 xml_end_tag(void *userData, const char *name)
1218 {
1219 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1220 const char *c = strchr(name, ':');
1221 char *ep;
1222
1223 ctx->userFunc(ctx, 1);
1224
1225 if (c == NULL)
1226 c = name;
1227 else
1228 c++;
1229
1230 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1231 *ep = 0;
1232 }
1233
1234 static void
1235 xml_cdata(void *userData, const XML_Char *s, int len)
1236 {
1237 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1238 free(ctx->cdata);
1239 ctx->cdata = xmemdupz(s, len);
1240 }
1241
1242 static struct remote_lock *lock_remote(const char *path, long timeout)
1243 {
1244 struct active_request_slot *slot;
1245 struct slot_results results;
1246 struct buffer out_buffer = { STRBUF_INIT, 0 };
1247 struct strbuf in_buffer = STRBUF_INIT;
1248 char *url;
1249 char *ep;
1250 char timeout_header[25];
1251 struct remote_lock *lock = NULL;
1252 struct curl_slist *dav_headers = NULL;
1253 struct xml_ctx ctx;
1254 char *escaped;
1255
1256 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1257 sprintf(url, "%s%s", repo->url, path);
1258
1259 /* Make sure leading directories exist for the remote ref */
1260 ep = strchr(url + strlen(repo->url) + 1, '/');
1261 while (ep) {
1262 char saved_character = ep[1];
1263 ep[1] = '\0';
1264 slot = get_active_slot();
1265 slot->results = &results;
1266 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1267 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1268 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1269 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1270 if (start_active_slot(slot)) {
1271 run_active_slot(slot);
1272 if (results.curl_result != CURLE_OK &&
1273 results.http_code != 405) {
1274 fprintf(stderr,
1275 "Unable to create branch path %s\n",
1276 url);
1277 free(url);
1278 return NULL;
1279 }
1280 } else {
1281 fprintf(stderr, "Unable to start MKCOL request\n");
1282 free(url);
1283 return NULL;
1284 }
1285 ep[1] = saved_character;
1286 ep = strchr(ep + 1, '/');
1287 }
1288
1289 escaped = xml_entities(git_default_email);
1290 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
1291 free(escaped);
1292
1293 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1294 dav_headers = curl_slist_append(dav_headers, timeout_header);
1295 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1296
1297 slot = get_active_slot();
1298 slot->results = &results;
1299 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1300 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1301 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1302 #ifndef NO_CURL_IOCTL
1303 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1304 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1305 #endif
1306 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1307 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1308 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1309 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1310 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1311 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1312
1313 lock = xcalloc(1, sizeof(*lock));
1314 lock->timeout = -1;
1315
1316 if (start_active_slot(slot)) {
1317 run_active_slot(slot);
1318 if (results.curl_result == CURLE_OK) {
1319 XML_Parser parser = XML_ParserCreate(NULL);
1320 enum XML_Status result;
1321 ctx.name = xcalloc(10, 1);
1322 ctx.len = 0;
1323 ctx.cdata = NULL;
1324 ctx.userFunc = handle_new_lock_ctx;
1325 ctx.userData = lock;
1326 XML_SetUserData(parser, &ctx);
1327 XML_SetElementHandler(parser, xml_start_tag,
1328 xml_end_tag);
1329 XML_SetCharacterDataHandler(parser, xml_cdata);
1330 result = XML_Parse(parser, in_buffer.buf,
1331 in_buffer.len, 1);
1332 free(ctx.name);
1333 if (result != XML_STATUS_OK) {
1334 fprintf(stderr, "XML error: %s\n",
1335 XML_ErrorString(
1336 XML_GetErrorCode(parser)));
1337 lock->timeout = -1;
1338 }
1339 XML_ParserFree(parser);
1340 }
1341 } else {
1342 fprintf(stderr, "Unable to start LOCK request\n");
1343 }
1344
1345 curl_slist_free_all(dav_headers);
1346 strbuf_release(&out_buffer.buf);
1347 strbuf_release(&in_buffer);
1348
1349 if (lock->token == NULL || lock->timeout <= 0) {
1350 free(lock->token);
1351 free(lock->owner);
1352 free(url);
1353 free(lock);
1354 lock = NULL;
1355 } else {
1356 lock->url = url;
1357 lock->start_time = time(NULL);
1358 lock->next = repo->locks;
1359 repo->locks = lock;
1360 }
1361
1362 return lock;
1363 }
1364
1365 static int unlock_remote(struct remote_lock *lock)
1366 {
1367 struct active_request_slot *slot;
1368 struct slot_results results;
1369 struct remote_lock *prev = repo->locks;
1370 struct curl_slist *dav_headers;
1371 int rc = 0;
1372
1373 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1374
1375 slot = get_active_slot();
1376 slot->results = &results;
1377 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1378 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1379 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1380 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1381
1382 if (start_active_slot(slot)) {
1383 run_active_slot(slot);
1384 if (results.curl_result == CURLE_OK)
1385 rc = 1;
1386 else
1387 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1388 results.http_code);
1389 } else {
1390 fprintf(stderr, "Unable to start UNLOCK request\n");
1391 }
1392
1393 curl_slist_free_all(dav_headers);
1394
1395 if (repo->locks == lock) {
1396 repo->locks = lock->next;
1397 } else {
1398 while (prev && prev->next != lock)
1399 prev = prev->next;
1400 if (prev)
1401 prev->next = prev->next->next;
1402 }
1403
1404 free(lock->owner);
1405 free(lock->url);
1406 free(lock->token);
1407 free(lock);
1408
1409 return rc;
1410 }
1411
1412 static void remove_locks(void)
1413 {
1414 struct remote_lock *lock = repo->locks;
1415
1416 fprintf(stderr, "Removing remote locks...\n");
1417 while (lock) {
1418 unlock_remote(lock);
1419 lock = lock->next;
1420 }
1421 }
1422
1423 static void remove_locks_on_signal(int signo)
1424 {
1425 remove_locks();
1426 sigchain_pop(signo);
1427 raise(signo);
1428 }
1429
1430 static void remote_ls(const char *path, int flags,
1431 void (*userFunc)(struct remote_ls_ctx *ls),
1432 void *userData);
1433
1434 static void process_ls_object(struct remote_ls_ctx *ls)
1435 {
1436 unsigned int *parent = (unsigned int *)ls->userData;
1437 char *path = ls->dentry_name;
1438 char *obj_hex;
1439
1440 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1441 remote_dir_exists[*parent] = 1;
1442 return;
1443 }
1444
1445 if (strlen(path) != 49)
1446 return;
1447 path += 8;
1448 obj_hex = xmalloc(strlen(path));
1449 /* NB: path is not null-terminated, can not use strlcpy here */
1450 memcpy(obj_hex, path, 2);
1451 strcpy(obj_hex + 2, path + 3);
1452 one_remote_object(obj_hex);
1453 free(obj_hex);
1454 }
1455
1456 static void process_ls_ref(struct remote_ls_ctx *ls)
1457 {
1458 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1459 fprintf(stderr, " %s\n", ls->dentry_name);
1460 return;
1461 }
1462
1463 if (!(ls->dentry_flags & IS_DIR))
1464 one_remote_ref(ls->dentry_name);
1465 }
1466
1467 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1468 {
1469 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1470
1471 if (tag_closed) {
1472 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1473 if (ls->dentry_flags & IS_DIR) {
1474 if (ls->flags & PROCESS_DIRS) {
1475 ls->userFunc(ls);
1476 }
1477 if (strcmp(ls->dentry_name, ls->path) &&
1478 ls->flags & RECURSIVE) {
1479 remote_ls(ls->dentry_name,
1480 ls->flags,
1481 ls->userFunc,
1482 ls->userData);
1483 }
1484 } else if (ls->flags & PROCESS_FILES) {
1485 ls->userFunc(ls);
1486 }
1487 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1488 char *path = ctx->cdata;
1489 if (*ctx->cdata == 'h') {
1490 path = strstr(path, "//");
1491 if (path) {
1492 path = strchr(path+2, '/');
1493 }
1494 }
1495 if (path) {
1496 path += repo->path_len;
1497 ls->dentry_name = xstrdup(path);
1498 }
1499 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1500 ls->dentry_flags |= IS_DIR;
1501 }
1502 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1503 free(ls->dentry_name);
1504 ls->dentry_name = NULL;
1505 ls->dentry_flags = 0;
1506 }
1507 }
1508
1509 /*
1510 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1511 * should _only_ heed the information from that file, instead of trying to
1512 * determine the refs from the remote file system (badly: it does not even
1513 * know about packed-refs).
1514 */
1515 static void remote_ls(const char *path, int flags,
1516 void (*userFunc)(struct remote_ls_ctx *ls),
1517 void *userData)
1518 {
1519 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1520 struct active_request_slot *slot;
1521 struct slot_results results;
1522 struct strbuf in_buffer = STRBUF_INIT;
1523 struct buffer out_buffer = { STRBUF_INIT, 0 };
1524 struct curl_slist *dav_headers = NULL;
1525 struct xml_ctx ctx;
1526 struct remote_ls_ctx ls;
1527
1528 ls.flags = flags;
1529 ls.path = xstrdup(path);
1530 ls.dentry_name = NULL;
1531 ls.dentry_flags = 0;
1532 ls.userData = userData;
1533 ls.userFunc = userFunc;
1534
1535 sprintf(url, "%s%s", repo->url, path);
1536
1537 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1538
1539 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1540 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1541
1542 slot = get_active_slot();
1543 slot->results = &results;
1544 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1545 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1546 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1547 #ifndef NO_CURL_IOCTL
1548 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1549 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1550 #endif
1551 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1552 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1553 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1554 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1555 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1556 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1557
1558 if (start_active_slot(slot)) {
1559 run_active_slot(slot);
1560 if (results.curl_result == CURLE_OK) {
1561 XML_Parser parser = XML_ParserCreate(NULL);
1562 enum XML_Status result;
1563 ctx.name = xcalloc(10, 1);
1564 ctx.len = 0;
1565 ctx.cdata = NULL;
1566 ctx.userFunc = handle_remote_ls_ctx;
1567 ctx.userData = &ls;
1568 XML_SetUserData(parser, &ctx);
1569 XML_SetElementHandler(parser, xml_start_tag,
1570 xml_end_tag);
1571 XML_SetCharacterDataHandler(parser, xml_cdata);
1572 result = XML_Parse(parser, in_buffer.buf,
1573 in_buffer.len, 1);
1574 free(ctx.name);
1575
1576 if (result != XML_STATUS_OK) {
1577 fprintf(stderr, "XML error: %s\n",
1578 XML_ErrorString(
1579 XML_GetErrorCode(parser)));
1580 }
1581 XML_ParserFree(parser);
1582 }
1583 } else {
1584 fprintf(stderr, "Unable to start PROPFIND request\n");
1585 }
1586
1587 free(ls.path);
1588 free(url);
1589 strbuf_release(&out_buffer.buf);
1590 strbuf_release(&in_buffer);
1591 curl_slist_free_all(dav_headers);
1592 }
1593
1594 static void get_remote_object_list(unsigned char parent)
1595 {
1596 char path[] = "objects/XX/";
1597 static const char hex[] = "0123456789abcdef";
1598 unsigned int val = parent;
1599
1600 path[8] = hex[val >> 4];
1601 path[9] = hex[val & 0xf];
1602 remote_dir_exists[val] = 0;
1603 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1604 process_ls_object, &val);
1605 }
1606
1607 static int locking_available(void)
1608 {
1609 struct active_request_slot *slot;
1610 struct slot_results results;
1611 struct strbuf in_buffer = STRBUF_INIT;
1612 struct buffer out_buffer = { STRBUF_INIT, 0 };
1613 struct curl_slist *dav_headers = NULL;
1614 struct xml_ctx ctx;
1615 int lock_flags = 0;
1616 char *escaped;
1617
1618 escaped = xml_entities(repo->url);
1619 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1620 free(escaped);
1621
1622 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1623 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1624
1625 slot = get_active_slot();
1626 slot->results = &results;
1627 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1628 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1629 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1630 #ifndef NO_CURL_IOCTL
1631 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1632 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1633 #endif
1634 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1635 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1636 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1637 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1638 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1639 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1640
1641 if (start_active_slot(slot)) {
1642 run_active_slot(slot);
1643 if (results.curl_result == CURLE_OK) {
1644 XML_Parser parser = XML_ParserCreate(NULL);
1645 enum XML_Status result;
1646 ctx.name = xcalloc(10, 1);
1647 ctx.len = 0;
1648 ctx.cdata = NULL;
1649 ctx.userFunc = handle_lockprop_ctx;
1650 ctx.userData = &lock_flags;
1651 XML_SetUserData(parser, &ctx);
1652 XML_SetElementHandler(parser, xml_start_tag,
1653 xml_end_tag);
1654 result = XML_Parse(parser, in_buffer.buf,
1655 in_buffer.len, 1);
1656 free(ctx.name);
1657
1658 if (result != XML_STATUS_OK) {
1659 fprintf(stderr, "XML error: %s\n",
1660 XML_ErrorString(
1661 XML_GetErrorCode(parser)));
1662 lock_flags = 0;
1663 }
1664 XML_ParserFree(parser);
1665 if (!lock_flags)
1666 error("no DAV locking support on %s",
1667 repo->url);
1668
1669 } else {
1670 error("Cannot access URL %s, return code %d",
1671 repo->url, results.curl_result);
1672 lock_flags = 0;
1673 }
1674 } else {
1675 error("Unable to start PROPFIND request on %s", repo->url);
1676 }
1677
1678 strbuf_release(&out_buffer.buf);
1679 strbuf_release(&in_buffer);
1680 curl_slist_free_all(dav_headers);
1681
1682 return lock_flags;
1683 }
1684
1685 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1686 {
1687 struct object_list *entry = xmalloc(sizeof(struct object_list));
1688 entry->item = obj;
1689 entry->next = *p;
1690 *p = entry;
1691 return &entry->next;
1692 }
1693
1694 static struct object_list **process_blob(struct blob *blob,
1695 struct object_list **p,
1696 struct name_path *path,
1697 const char *name)
1698 {
1699 struct object *obj = &blob->object;
1700
1701 obj->flags |= LOCAL;
1702
1703 if (obj->flags & (UNINTERESTING | SEEN))
1704 return p;
1705
1706 obj->flags |= SEEN;
1707 return add_one_object(obj, p);
1708 }
1709
1710 static struct object_list **process_tree(struct tree *tree,
1711 struct object_list **p,
1712 struct name_path *path,
1713 const char *name)
1714 {
1715 struct object *obj = &tree->object;
1716 struct tree_desc desc;
1717 struct name_entry entry;
1718 struct name_path me;
1719
1720 obj->flags |= LOCAL;
1721
1722 if (obj->flags & (UNINTERESTING | SEEN))
1723 return p;
1724 if (parse_tree(tree) < 0)
1725 die("bad tree object %s", sha1_to_hex(obj->sha1));
1726
1727 obj->flags |= SEEN;
1728 name = xstrdup(name);
1729 p = add_one_object(obj, p);
1730 me.up = path;
1731 me.elem = name;
1732 me.elem_len = strlen(name);
1733
1734 init_tree_desc(&desc, tree->buffer, tree->size);
1735
1736 while (tree_entry(&desc, &entry))
1737 switch (object_type(entry.mode)) {
1738 case OBJ_TREE:
1739 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1740 break;
1741 case OBJ_BLOB:
1742 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1743 break;
1744 default:
1745 /* Subproject commit - not in this repository */
1746 break;
1747 }
1748
1749 free(tree->buffer);
1750 tree->buffer = NULL;
1751 return p;
1752 }
1753
1754 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1755 {
1756 int i;
1757 struct commit *commit;
1758 struct object_list **p = &objects;
1759 int count = 0;
1760
1761 while ((commit = get_revision(revs)) != NULL) {
1762 p = process_tree(commit->tree, p, NULL, "");
1763 commit->object.flags |= LOCAL;
1764 if (!(commit->object.flags & UNINTERESTING))
1765 count += add_send_request(&commit->object, lock);
1766 }
1767
1768 for (i = 0; i < revs->pending.nr; i++) {
1769 struct object_array_entry *entry = revs->pending.objects + i;
1770 struct object *obj = entry->item;
1771 const char *name = entry->name;
1772
1773 if (obj->flags & (UNINTERESTING | SEEN))
1774 continue;
1775 if (obj->type == OBJ_TAG) {
1776 obj->flags |= SEEN;
1777 p = add_one_object(obj, p);
1778 continue;
1779 }
1780 if (obj->type == OBJ_TREE) {
1781 p = process_tree((struct tree *)obj, p, NULL, name);
1782 continue;
1783 }
1784 if (obj->type == OBJ_BLOB) {
1785 p = process_blob((struct blob *)obj, p, NULL, name);
1786 continue;
1787 }
1788 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1789 }
1790
1791 while (objects) {
1792 if (!(objects->item->flags & UNINTERESTING))
1793 count += add_send_request(objects->item, lock);
1794 objects = objects->next;
1795 }
1796
1797 return count;
1798 }
1799
1800 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1801 {
1802 struct active_request_slot *slot;
1803 struct slot_results results;
1804 struct buffer out_buffer = { STRBUF_INIT, 0 };
1805 struct curl_slist *dav_headers;
1806
1807 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1808
1809 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1810
1811 slot = get_active_slot();
1812 slot->results = &results;
1813 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1814 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1815 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1816 #ifndef NO_CURL_IOCTL
1817 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1818 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1819 #endif
1820 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1821 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1822 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1823 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1824 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1825 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1826
1827 if (start_active_slot(slot)) {
1828 run_active_slot(slot);
1829 strbuf_release(&out_buffer.buf);
1830 if (results.curl_result != CURLE_OK) {
1831 fprintf(stderr,
1832 "PUT error: curl result=%d, HTTP code=%ld\n",
1833 results.curl_result, results.http_code);
1834 /* We should attempt recovery? */
1835 return 0;
1836 }
1837 } else {
1838 strbuf_release(&out_buffer.buf);
1839 fprintf(stderr, "Unable to start PUT request\n");
1840 return 0;
1841 }
1842
1843 return 1;
1844 }
1845
1846 static struct ref *remote_refs, **remote_tail;
1847
1848 static void one_remote_ref(char *refname)
1849 {
1850 struct ref *ref;
1851 struct object *obj;
1852
1853 ref = alloc_ref(refname);
1854
1855 if (http_fetch_ref(repo->url, ref) != 0) {
1856 fprintf(stderr,
1857 "Unable to fetch ref %s from %s\n",
1858 refname, repo->url);
1859 free(ref);
1860 return;
1861 }
1862
1863 /*
1864 * Fetch a copy of the object if it doesn't exist locally - it
1865 * may be required for updating server info later.
1866 */
1867 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1868 obj = lookup_unknown_object(ref->old_sha1);
1869 if (obj) {
1870 fprintf(stderr, " fetch %s for %s\n",
1871 sha1_to_hex(ref->old_sha1), refname);
1872 add_fetch_request(obj);
1873 }
1874 }
1875
1876 *remote_tail = ref;
1877 remote_tail = &ref->next;
1878 }
1879
1880 static void get_dav_remote_heads(void)
1881 {
1882 remote_tail = &remote_refs;
1883 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1884 }
1885
1886 static int is_zero_sha1(const unsigned char *sha1)
1887 {
1888 int i;
1889
1890 for (i = 0; i < 20; i++) {
1891 if (*sha1++)
1892 return 0;
1893 }
1894 return 1;
1895 }
1896
1897 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1898 {
1899 struct strbuf *buf = (struct strbuf *)ls->userData;
1900 struct object *o;
1901 int len;
1902 char *ref_info;
1903 struct ref *ref;
1904
1905 ref = alloc_ref(ls->dentry_name);
1906
1907 if (http_fetch_ref(repo->url, ref) != 0) {
1908 fprintf(stderr,
1909 "Unable to fetch ref %s from %s\n",
1910 ls->dentry_name, repo->url);
1911 aborted = 1;
1912 free(ref);
1913 return;
1914 }
1915
1916 o = parse_object(ref->old_sha1);
1917 if (!o) {
1918 fprintf(stderr,
1919 "Unable to parse object %s for remote ref %s\n",
1920 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1921 aborted = 1;
1922 free(ref);
1923 return;
1924 }
1925
1926 len = strlen(ls->dentry_name) + 42;
1927 ref_info = xcalloc(len + 1, 1);
1928 sprintf(ref_info, "%s %s\n",
1929 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1930 fwrite_buffer(ref_info, 1, len, buf);
1931 free(ref_info);
1932
1933 if (o->type == OBJ_TAG) {
1934 o = deref_tag(o, ls->dentry_name, 0);
1935 if (o) {
1936 len = strlen(ls->dentry_name) + 45;
1937 ref_info = xcalloc(len + 1, 1);
1938 sprintf(ref_info, "%s %s^{}\n",
1939 sha1_to_hex(o->sha1), ls->dentry_name);
1940 fwrite_buffer(ref_info, 1, len, buf);
1941 free(ref_info);
1942 }
1943 }
1944 free(ref);
1945 }
1946
1947 static void update_remote_info_refs(struct remote_lock *lock)
1948 {
1949 struct buffer buffer = { STRBUF_INIT, 0 };
1950 struct active_request_slot *slot;
1951 struct slot_results results;
1952 struct curl_slist *dav_headers;
1953
1954 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1955 add_remote_info_ref, &buffer.buf);
1956 if (!aborted) {
1957 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1958
1959 slot = get_active_slot();
1960 slot->results = &results;
1961 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1962 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1963 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1964 #ifndef NO_CURL_IOCTL
1965 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1966 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1967 #endif
1968 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1969 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1971 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1972 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1973 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1974
1975 if (start_active_slot(slot)) {
1976 run_active_slot(slot);
1977 if (results.curl_result != CURLE_OK) {
1978 fprintf(stderr,
1979 "PUT error: curl result=%d, HTTP code=%ld\n",
1980 results.curl_result, results.http_code);
1981 }
1982 }
1983 }
1984 strbuf_release(&buffer.buf);
1985 }
1986
1987 static int remote_exists(const char *path)
1988 {
1989 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1990 struct active_request_slot *slot;
1991 struct slot_results results;
1992 int ret = -1;
1993
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_URL, url);
1999 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2000
2001 if (start_active_slot(slot)) {
2002 run_active_slot(slot);
2003 if (results.http_code == 404)
2004 ret = 0;
2005 else if (results.curl_result == CURLE_OK)
2006 ret = 1;
2007 else
2008 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2009 } else {
2010 fprintf(stderr, "Unable to start HEAD request\n");
2011 }
2012
2013 free(url);
2014 return ret;
2015 }
2016
2017 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2018 {
2019 char *url;
2020 struct strbuf buffer = STRBUF_INIT;
2021 struct active_request_slot *slot;
2022 struct slot_results results;
2023
2024 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2025 sprintf(url, "%s%s", repo->url, path);
2026
2027 slot = get_active_slot();
2028 slot->results = &results;
2029 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2030 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2031 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2032 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2033 if (start_active_slot(slot)) {
2034 run_active_slot(slot);
2035 if (results.curl_result != CURLE_OK) {
2036 die("Couldn't get %s for remote symref\n%s",
2037 url, curl_errorstr);
2038 }
2039 } else {
2040 die("Unable to start remote symref request");
2041 }
2042 free(url);
2043
2044 free(*symref);
2045 *symref = NULL;
2046 hashclr(sha1);
2047
2048 if (buffer.len == 0)
2049 return;
2050
2051 /* If it's a symref, set the refname; otherwise try for a sha1 */
2052 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2053 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2054 } else {
2055 get_sha1_hex(buffer.buf, sha1);
2056 }
2057
2058 strbuf_release(&buffer);
2059 }
2060
2061 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2062 {
2063 struct commit *head = lookup_commit(head_sha1);
2064 struct commit *branch = lookup_commit(branch_sha1);
2065 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2066
2067 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2068 }
2069
2070 static int delete_remote_branch(char *pattern, int force)
2071 {
2072 struct ref *refs = remote_refs;
2073 struct ref *remote_ref = NULL;
2074 unsigned char head_sha1[20];
2075 char *symref = NULL;
2076 int match;
2077 int patlen = strlen(pattern);
2078 int i;
2079 struct active_request_slot *slot;
2080 struct slot_results results;
2081 char *url;
2082
2083 /* Find the remote branch(es) matching the specified branch name */
2084 for (match = 0; refs; refs = refs->next) {
2085 char *name = refs->name;
2086 int namelen = strlen(name);
2087 if (namelen < patlen ||
2088 memcmp(name + namelen - patlen, pattern, patlen))
2089 continue;
2090 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2091 continue;
2092 match++;
2093 remote_ref = refs;
2094 }
2095 if (match == 0)
2096 return error("No remote branch matches %s", pattern);
2097 if (match != 1)
2098 return error("More than one remote branch matches %s",
2099 pattern);
2100
2101 /*
2102 * Remote HEAD must be a symref (not exactly foolproof; a remote
2103 * symlink to a symref will look like a symref)
2104 */
2105 fetch_symref("HEAD", &symref, head_sha1);
2106 if (!symref)
2107 return error("Remote HEAD is not a symref");
2108
2109 /* Remote branch must not be the remote HEAD */
2110 for (i=0; symref && i<MAXDEPTH; i++) {
2111 if (!strcmp(remote_ref->name, symref))
2112 return error("Remote branch %s is the current HEAD",
2113 remote_ref->name);
2114 fetch_symref(symref, &symref, head_sha1);
2115 }
2116
2117 /* Run extra sanity checks if delete is not forced */
2118 if (!force) {
2119 /* Remote HEAD must resolve to a known object */
2120 if (symref)
2121 return error("Remote HEAD symrefs too deep");
2122 if (is_zero_sha1(head_sha1))
2123 return error("Unable to resolve remote HEAD");
2124 if (!has_sha1_file(head_sha1))
2125 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2126
2127 /* Remote branch must resolve to a known object */
2128 if (is_zero_sha1(remote_ref->old_sha1))
2129 return error("Unable to resolve remote branch %s",
2130 remote_ref->name);
2131 if (!has_sha1_file(remote_ref->old_sha1))
2132 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));
2133
2134 /* Remote branch must be an ancestor of remote HEAD */
2135 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2136 return error("The branch '%s' is not an ancestor "
2137 "of your current HEAD.\n"
2138 "If you are sure you want to delete it,"
2139 " run:\n\t'git http-push -D %s %s'",
2140 remote_ref->name, repo->url, pattern);
2141 }
2142 }
2143
2144 /* Send delete request */
2145 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2146 if (dry_run)
2147 return 0;
2148 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2149 sprintf(url, "%s%s", repo->url, remote_ref->name);
2150 slot = get_active_slot();
2151 slot->results = &results;
2152 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2153 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2154 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2155 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2156 if (start_active_slot(slot)) {
2157 run_active_slot(slot);
2158 free(url);
2159 if (results.curl_result != CURLE_OK)
2160 return error("DELETE request failed (%d/%ld)\n",
2161 results.curl_result, results.http_code);
2162 } else {
2163 free(url);
2164 return error("Unable to start DELETE request");
2165 }
2166
2167 return 0;
2168 }
2169
2170 int main(int argc, char **argv)
2171 {
2172 struct transfer_request *request;
2173 struct transfer_request *next_request;
2174 int nr_refspec = 0;
2175 char **refspec = NULL;
2176 struct remote_lock *ref_lock = NULL;
2177 struct remote_lock *info_ref_lock = NULL;
2178 struct rev_info revs;
2179 int delete_branch = 0;
2180 int force_delete = 0;
2181 int objects_to_send;
2182 int rc = 0;
2183 int i;
2184 int new_refs;
2185 struct ref *ref, *local_refs;
2186 struct remote *remote;
2187 char *rewritten_url = NULL;
2188
2189 git_extract_argv0_path(argv[0]);
2190
2191 setup_git_directory();
2192
2193 repo = xcalloc(sizeof(*repo), 1);
2194
2195 argv++;
2196 for (i = 1; i < argc; i++, argv++) {
2197 char *arg = *argv;
2198
2199 if (*arg == '-') {
2200 if (!strcmp(arg, "--all")) {
2201 push_all = MATCH_REFS_ALL;
2202 continue;
2203 }
2204 if (!strcmp(arg, "--force")) {
2205 force_all = 1;
2206 continue;
2207 }
2208 if (!strcmp(arg, "--dry-run")) {
2209 dry_run = 1;
2210 continue;
2211 }
2212 if (!strcmp(arg, "--verbose")) {
2213 push_verbosely = 1;
2214 continue;
2215 }
2216 if (!strcmp(arg, "-d")) {
2217 delete_branch = 1;
2218 continue;
2219 }
2220 if (!strcmp(arg, "-D")) {
2221 delete_branch = 1;
2222 force_delete = 1;
2223 continue;
2224 }
2225 }
2226 if (!repo->url) {
2227 char *path = strstr(arg, "//");
2228 repo->url = arg;
2229 repo->path_len = strlen(arg);
2230 if (path) {
2231 repo->path = strchr(path+2, '/');
2232 if (repo->path)
2233 repo->path_len = strlen(repo->path);
2234 }
2235 continue;
2236 }
2237 refspec = argv;
2238 nr_refspec = argc - i;
2239 break;
2240 }
2241
2242 #ifndef USE_CURL_MULTI
2243 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2244 #endif
2245
2246 if (!repo->url)
2247 usage(http_push_usage);
2248
2249 if (delete_branch && nr_refspec != 1)
2250 die("You must specify only one branch name when deleting a remote branch");
2251
2252 memset(remote_dir_exists, -1, 256);
2253
2254 /*
2255 * Create a minimum remote by hand to give to http_init(),
2256 * primarily to allow it to look at the URL.
2257 */
2258 remote = xcalloc(sizeof(*remote), 1);
2259 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2260 remote->url[remote->url_nr++] = repo->url;
2261 http_init(remote);
2262
2263 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2264
2265 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2266 rewritten_url = xmalloc(strlen(repo->url)+2);
2267 strcpy(rewritten_url, repo->url);
2268 strcat(rewritten_url, "/");
2269 repo->path = rewritten_url + (repo->path - repo->url);
2270 repo->path_len++;
2271 repo->url = rewritten_url;
2272 }
2273
2274 /* Verify DAV compliance/lock support */
2275 if (!locking_available()) {
2276 rc = 1;
2277 goto cleanup;
2278 }
2279
2280 sigchain_push_common(remove_locks_on_signal);
2281
2282 /* Check whether the remote has server info files */
2283 repo->can_update_info_refs = 0;
2284 repo->has_info_refs = remote_exists("info/refs");
2285 repo->has_info_packs = remote_exists("objects/info/packs");
2286 if (repo->has_info_refs) {
2287 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2288 if (info_ref_lock)
2289 repo->can_update_info_refs = 1;
2290 else {
2291 error("cannot lock existing info/refs");
2292 rc = 1;
2293 goto cleanup;
2294 }
2295 }
2296 if (repo->has_info_packs)
2297 fetch_indices();
2298
2299 /* Get a list of all local and remote heads to validate refspecs */
2300 local_refs = get_local_heads();
2301 fprintf(stderr, "Fetching remote heads...\n");
2302 get_dav_remote_heads();
2303
2304 /* Remove a remote branch if -d or -D was specified */
2305 if (delete_branch) {
2306 if (delete_remote_branch(refspec[0], force_delete) == -1)
2307 fprintf(stderr, "Unable to delete remote branch %s\n",
2308 refspec[0]);
2309 goto cleanup;
2310 }
2311
2312 /* match them up */
2313 if (!remote_tail)
2314 remote_tail = &remote_refs;
2315 if (match_refs(local_refs, remote_refs, &remote_tail,
2316 nr_refspec, (const char **) refspec, push_all)) {
2317 rc = -1;
2318 goto cleanup;
2319 }
2320 if (!remote_refs) {
2321 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2322 rc = 0;
2323 goto cleanup;
2324 }
2325
2326 new_refs = 0;
2327 for (ref = remote_refs; ref; ref = ref->next) {
2328 char old_hex[60], *new_hex;
2329 const char *commit_argv[4];
2330 int commit_argc;
2331 char *new_sha1_hex, *old_sha1_hex;
2332
2333 if (!ref->peer_ref)
2334 continue;
2335
2336 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2337 if (delete_remote_branch(ref->name, 1) == -1) {
2338 error("Could not remove %s", ref->name);
2339 rc = -4;
2340 }
2341 new_refs++;
2342 continue;
2343 }
2344
2345 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2346 if (push_verbosely || 1)
2347 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2348 continue;
2349 }
2350
2351 if (!force_all &&
2352 !is_zero_sha1(ref->old_sha1) &&
2353 !ref->force) {
2354 if (!has_sha1_file(ref->old_sha1) ||
2355 !ref_newer(ref->peer_ref->new_sha1,
2356 ref->old_sha1)) {
2357 /*
2358 * We do not have the remote ref, or
2359 * we know that the remote ref is not
2360 * an ancestor of what we are trying to
2361 * push. Either way this can be losing
2362 * commits at the remote end and likely
2363 * we were not up to date to begin with.
2364 */
2365 error("remote '%s' is not an ancestor of\n"
2366 "local '%s'.\n"
2367 "Maybe you are not up-to-date and "
2368 "need to pull first?",
2369 ref->name,
2370 ref->peer_ref->name);
2371 rc = -2;
2372 continue;
2373 }
2374 }
2375 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2376 new_refs++;
2377 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2378 new_hex = sha1_to_hex(ref->new_sha1);
2379
2380 fprintf(stderr, "updating '%s'", ref->name);
2381 if (strcmp(ref->name, ref->peer_ref->name))
2382 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2383 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2384 if (dry_run)
2385 continue;
2386
2387 /* Lock remote branch ref */
2388 ref_lock = lock_remote(ref->name, LOCK_TIME);
2389 if (ref_lock == NULL) {
2390 fprintf(stderr, "Unable to lock remote branch %s\n",
2391 ref->name);
2392 rc = 1;
2393 continue;
2394 }
2395
2396 /* Set up revision info for this refspec */
2397 commit_argc = 3;
2398 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2399 old_sha1_hex = NULL;
2400 commit_argv[1] = "--objects";
2401 commit_argv[2] = new_sha1_hex;
2402 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2403 old_sha1_hex = xmalloc(42);
2404 sprintf(old_sha1_hex, "^%s",
2405 sha1_to_hex(ref->old_sha1));
2406 commit_argv[3] = old_sha1_hex;
2407 commit_argc++;
2408 }
2409 init_revisions(&revs, setup_git_directory());
2410 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2411 revs.edge_hint = 0; /* just in case */
2412 free(new_sha1_hex);
2413 if (old_sha1_hex) {
2414 free(old_sha1_hex);
2415 commit_argv[1] = NULL;
2416 }
2417
2418 /* Generate a list of objects that need to be pushed */
2419 pushing = 0;
2420 if (prepare_revision_walk(&revs))
2421 die("revision walk setup failed");
2422 mark_edges_uninteresting(revs.commits, &revs, NULL);
2423 objects_to_send = get_delta(&revs, ref_lock);
2424 finish_all_active_slots();
2425
2426 /* Push missing objects to remote, this would be a
2427 convenient time to pack them first if appropriate. */
2428 pushing = 1;
2429 if (objects_to_send)
2430 fprintf(stderr, " sending %d objects\n",
2431 objects_to_send);
2432 #ifdef USE_CURL_MULTI
2433 fill_active_slots();
2434 add_fill_function(NULL, fill_active_slot);
2435 #endif
2436 do {
2437 finish_all_active_slots();
2438 #ifdef USE_CURL_MULTI
2439 fill_active_slots();
2440 #endif
2441 } while (request_queue_head && !aborted);
2442
2443 /* Update the remote branch if all went well */
2444 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2445 rc = 1;
2446
2447 if (!rc)
2448 fprintf(stderr, " done\n");
2449 unlock_remote(ref_lock);
2450 check_locks();
2451 }
2452
2453 /* Update remote server info if appropriate */
2454 if (repo->has_info_refs && new_refs) {
2455 if (info_ref_lock && repo->can_update_info_refs) {
2456 fprintf(stderr, "Updating remote server info\n");
2457 if (!dry_run)
2458 update_remote_info_refs(info_ref_lock);
2459 } else {
2460 fprintf(stderr, "Unable to update server info\n");
2461 }
2462 }
2463
2464 cleanup:
2465 free(rewritten_url);
2466 if (info_ref_lock)
2467 unlock_remote(info_ref_lock);
2468 free(repo);
2469
2470 curl_slist_free_all(no_pragma_header);
2471
2472 http_cleanup();
2473
2474 request = request_queue_head;
2475 while (request != NULL) {
2476 next_request = request->next;
2477 release_request(request);
2478 request = next_request;
2479 }
2480
2481 return rc;
2482 }
git with Jakub Narębski modifications