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gitweb: Fix "next" link on bottom of page
[git/jnareb-git/bp-gitweb.git] / http-push.c
blobc93e781c3b503bae6ee7c6735fa058aa0a98e026
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
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #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>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #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>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78
79 static int push_verbosely;
80 static int push_all = MATCH_REFS_NONE;
81 static int force_all;
82 static int dry_run;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 request->tmpfile);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 strbuf_init(&request->buffer.buf, size);
498 request->buffer.posn = 0;
499
500 /* Compress it */
501 stream.next_out = (unsigned char *)request->buffer.buf.buf;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.buf.len = stream.total_out;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = 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_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 free(request->url);
668 free(request);
669 }
670
671 static void finish_request(struct transfer_request *request)
672 {
673 struct stat st;
674 struct packed_git *target;
675 struct packed_git **lst;
676
677 request->curl_result = request->slot->curl_result;
678 request->http_code = request->slot->http_code;
679 request->slot = NULL;
680
681 /* Keep locks active */
682 check_locks();
683
684 if (request->headers != NULL)
685 curl_slist_free_all(request->headers);
686
687 /* URL is reused for MOVE after PUT */
688 if (request->state != RUN_PUT) {
689 free(request->url);
690 request->url = NULL;
691 }
692
693 if (request->state == RUN_MKCOL) {
694 if (request->curl_result == CURLE_OK ||
695 request->http_code == 405) {
696 remote_dir_exists[request->obj->sha1[0]] = 1;
697 start_put(request);
698 } else {
699 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
700 sha1_to_hex(request->obj->sha1),
701 request->curl_result, request->http_code);
702 request->state = ABORTED;
703 aborted = 1;
704 }
705 } else if (request->state == RUN_PUT) {
706 if (request->curl_result == CURLE_OK) {
707 start_move(request);
708 } else {
709 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
710 sha1_to_hex(request->obj->sha1),
711 request->curl_result, request->http_code);
712 request->state = ABORTED;
713 aborted = 1;
714 }
715 } else if (request->state == RUN_MOVE) {
716 if (request->curl_result == CURLE_OK) {
717 if (push_verbosely)
718 fprintf(stderr, " sent %s\n",
719 sha1_to_hex(request->obj->sha1));
720 request->obj->flags |= REMOTE;
721 release_request(request);
722 } else {
723 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
724 sha1_to_hex(request->obj->sha1),
725 request->curl_result, request->http_code);
726 request->state = ABORTED;
727 aborted = 1;
728 }
729 } else if (request->state == RUN_FETCH_LOOSE) {
730 fchmod(request->local_fileno, 0444);
731 close(request->local_fileno); request->local_fileno = -1;
732
733 if (request->curl_result != CURLE_OK &&
734 request->http_code != 416) {
735 if (stat(request->tmpfile, &st) == 0) {
736 if (st.st_size == 0)
737 unlink(request->tmpfile);
738 }
739 } else {
740 if (request->http_code == 416)
741 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
742
743 inflateEnd(&request->stream);
744 SHA1_Final(request->real_sha1, &request->c);
745 if (request->zret != Z_STREAM_END) {
746 unlink(request->tmpfile);
747 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
748 unlink(request->tmpfile);
749 } else {
750 request->rename =
751 move_temp_to_file(
752 request->tmpfile,
753 request->filename);
754 if (request->rename == 0) {
755 request->obj->flags |= (LOCAL | REMOTE);
756 }
757 }
758 }
759
760 /* Try fetching packed if necessary */
761 if (request->obj->flags & LOCAL)
762 release_request(request);
763 else
764 start_fetch_packed(request);
765
766 } else if (request->state == RUN_FETCH_PACKED) {
767 if (request->curl_result != CURLE_OK) {
768 fprintf(stderr, "Unable to get pack file %s\n%s",
769 request->url, curl_errorstr);
770 remote->can_update_info_refs = 0;
771 } else {
772 off_t pack_size = ftell(request->local_stream);
773
774 fclose(request->local_stream);
775 request->local_stream = NULL;
776 if (!move_temp_to_file(request->tmpfile,
777 request->filename)) {
778 target = (struct packed_git *)request->userData;
779 target->pack_size = pack_size;
780 lst = &remote->packs;
781 while (*lst != target)
782 lst = &((*lst)->next);
783 *lst = (*lst)->next;
784
785 if (!verify_pack(target, 0))
786 install_packed_git(target);
787 else
788 remote->can_update_info_refs = 0;
789 }
790 }
791 release_request(request);
792 }
793 }
794
795 #ifdef USE_CURL_MULTI
796 static int fill_active_slot(void *unused)
797 {
798 struct transfer_request *request = request_queue_head;
799
800 if (aborted)
801 return 0;
802
803 for (request = request_queue_head; request; request = request->next) {
804 if (request->state == NEED_FETCH) {
805 start_fetch_loose(request);
806 return 1;
807 } else if (pushing && request->state == NEED_PUSH) {
808 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
809 start_put(request);
810 } else {
811 start_mkcol(request);
812 }
813 return 1;
814 }
815 }
816 return 0;
817 }
818 #endif
819
820 static void get_remote_object_list(unsigned char parent);
821
822 static void add_fetch_request(struct object *obj)
823 {
824 struct transfer_request *request;
825
826 check_locks();
827
828 /*
829 * Don't fetch the object if it's known to exist locally
830 * or is already in the request queue
831 */
832 if (remote_dir_exists[obj->sha1[0]] == -1)
833 get_remote_object_list(obj->sha1[0]);
834 if (obj->flags & (LOCAL | FETCHING))
835 return;
836
837 obj->flags |= FETCHING;
838 request = xmalloc(sizeof(*request));
839 request->obj = obj;
840 request->url = NULL;
841 request->lock = NULL;
842 request->headers = NULL;
843 request->local_fileno = -1;
844 request->local_stream = NULL;
845 request->state = NEED_FETCH;
846 request->next = request_queue_head;
847 request_queue_head = request;
848
849 #ifdef USE_CURL_MULTI
850 fill_active_slots();
851 step_active_slots();
852 #endif
853 }
854
855 static int add_send_request(struct object *obj, struct remote_lock *lock)
856 {
857 struct transfer_request *request = request_queue_head;
858 struct packed_git *target;
859
860 /* Keep locks active */
861 check_locks();
862
863 /*
864 * Don't push the object if it's known to exist on the remote
865 * or is already in the request queue
866 */
867 if (remote_dir_exists[obj->sha1[0]] == -1)
868 get_remote_object_list(obj->sha1[0]);
869 if (obj->flags & (REMOTE | PUSHING))
870 return 0;
871 target = find_sha1_pack(obj->sha1, remote->packs);
872 if (target) {
873 obj->flags |= REMOTE;
874 return 0;
875 }
876
877 obj->flags |= PUSHING;
878 request = xmalloc(sizeof(*request));
879 request->obj = obj;
880 request->url = NULL;
881 request->lock = lock;
882 request->headers = NULL;
883 request->local_fileno = -1;
884 request->local_stream = NULL;
885 request->state = NEED_PUSH;
886 request->next = request_queue_head;
887 request_queue_head = request;
888
889 #ifdef USE_CURL_MULTI
890 fill_active_slots();
891 step_active_slots();
892 #endif
893
894 return 1;
895 }
896
897 static int fetch_index(unsigned char *sha1)
898 {
899 char *hex = sha1_to_hex(sha1);
900 char *filename;
901 char *url;
902 char tmpfile[PATH_MAX];
903 long prev_posn = 0;
904 char range[RANGE_HEADER_SIZE];
905 struct curl_slist *range_header = NULL;
906
907 FILE *indexfile;
908 struct active_request_slot *slot;
909 struct slot_results results;
910
911 /* Don't use the index if the pack isn't there */
912 url = xmalloc(strlen(remote->url) + 64);
913 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
914 slot = get_active_slot();
915 slot->results = &results;
916 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
917 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
918 if (start_active_slot(slot)) {
919 run_active_slot(slot);
920 if (results.curl_result != CURLE_OK) {
921 free(url);
922 return error("Unable to verify pack %s is available",
923 hex);
924 }
925 } else {
926 free(url);
927 return error("Unable to start request");
928 }
929
930 if (has_pack_index(sha1)) {
931 free(url);
932 return 0;
933 }
934
935 if (push_verbosely)
936 fprintf(stderr, "Getting index for pack %s\n", hex);
937
938 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
939
940 filename = sha1_pack_index_name(sha1);
941 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
942 indexfile = fopen(tmpfile, "a");
943 if (!indexfile) {
944 free(url);
945 return error("Unable to open local file %s for pack index",
946 tmpfile);
947 }
948
949 slot = get_active_slot();
950 slot->results = &results;
951 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
952 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
953 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
954 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
955 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
956 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
957 slot->local = indexfile;
958
959 /* If there is data present from a previous transfer attempt,
960 resume where it left off */
961 prev_posn = ftell(indexfile);
962 if (prev_posn>0) {
963 if (push_verbosely)
964 fprintf(stderr,
965 "Resuming fetch of index for pack %s at byte %ld\n",
966 hex, prev_posn);
967 sprintf(range, "Range: bytes=%ld-", prev_posn);
968 range_header = curl_slist_append(range_header, range);
969 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
970 }
971
972 if (start_active_slot(slot)) {
973 run_active_slot(slot);
974 if (results.curl_result != CURLE_OK) {
975 free(url);
976 fclose(indexfile);
977 return error("Unable to get pack index %s\n%s", url,
978 curl_errorstr);
979 }
980 } else {
981 free(url);
982 fclose(indexfile);
983 return error("Unable to start request");
984 }
985
986 free(url);
987 fclose(indexfile);
988
989 return move_temp_to_file(tmpfile, filename);
990 }
991
992 static int setup_index(unsigned char *sha1)
993 {
994 struct packed_git *new_pack;
995
996 if (fetch_index(sha1))
997 return -1;
998
999 new_pack = parse_pack_index(sha1);
1000 new_pack->next = remote->packs;
1001 remote->packs = new_pack;
1002 return 0;
1003 }
1004
1005 static int fetch_indices(void)
1006 {
1007 unsigned char sha1[20];
1008 char *url;
1009 struct strbuf buffer = STRBUF_INIT;
1010 char *data;
1011 int i = 0;
1012
1013 struct active_request_slot *slot;
1014 struct slot_results results;
1015
1016 if (push_verbosely)
1017 fprintf(stderr, "Getting pack list\n");
1018
1019 url = xmalloc(strlen(remote->url) + 20);
1020 sprintf(url, "%sobjects/info/packs", remote->url);
1021
1022 slot = get_active_slot();
1023 slot->results = &results;
1024 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1025 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1027 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1028 if (start_active_slot(slot)) {
1029 run_active_slot(slot);
1030 if (results.curl_result != CURLE_OK) {
1031 strbuf_release(&buffer);
1032 free(url);
1033 if (results.http_code == 404)
1034 return 0;
1035 else
1036 return error("%s", curl_errorstr);
1037 }
1038 } else {
1039 strbuf_release(&buffer);
1040 free(url);
1041 return error("Unable to start request");
1042 }
1043 free(url);
1044
1045 data = buffer.buf;
1046 while (i < buffer.len) {
1047 switch (data[i]) {
1048 case 'P':
1049 i++;
1050 if (i + 52 < buffer.len &&
1051 !prefixcmp(data + i, " pack-") &&
1052 !prefixcmp(data + i + 46, ".pack\n")) {
1053 get_sha1_hex(data + i + 6, sha1);
1054 setup_index(sha1);
1055 i += 51;
1056 break;
1057 }
1058 default:
1059 while (data[i] != '\n')
1060 i++;
1061 }
1062 i++;
1063 }
1064
1065 strbuf_release(&buffer);
1066 return 0;
1067 }
1068
1069 static void one_remote_object(const char *hex)
1070 {
1071 unsigned char sha1[20];
1072 struct object *obj;
1073
1074 if (get_sha1_hex(hex, sha1) != 0)
1075 return;
1076
1077 obj = lookup_object(sha1);
1078 if (!obj)
1079 obj = parse_object(sha1);
1080
1081 /* Ignore remote objects that don't exist locally */
1082 if (!obj)
1083 return;
1084
1085 obj->flags |= REMOTE;
1086 if (!object_list_contains(objects, obj))
1087 object_list_insert(obj, &objects);
1088 }
1089
1090 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1091 {
1092 int *lock_flags = (int *)ctx->userData;
1093
1094 if (tag_closed) {
1095 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1096 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1097 (*lock_flags & DAV_PROP_LOCKWR)) {
1098 *lock_flags |= DAV_LOCK_OK;
1099 }
1100 *lock_flags &= DAV_LOCK_OK;
1101 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1102 *lock_flags |= DAV_PROP_LOCKWR;
1103 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1104 *lock_flags |= DAV_PROP_LOCKEX;
1105 }
1106 }
1107 }
1108
1109 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1110 {
1111 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1112
1113 if (tag_closed && ctx->cdata) {
1114 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1115 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1116 strcpy(lock->owner, ctx->cdata);
1117 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1118 if (!prefixcmp(ctx->cdata, "Second-"))
1119 lock->timeout =
1120 strtol(ctx->cdata + 7, NULL, 10);
1121 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1122 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1123 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1124 strcpy(lock->token, ctx->cdata + 16);
1125 }
1126 }
1127 }
1128 }
1129
1130 static void one_remote_ref(char *refname);
1131
1132 static void
1133 xml_start_tag(void *userData, const char *name, const char **atts)
1134 {
1135 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1136 const char *c = strchr(name, ':');
1137 int new_len;
1138
1139 if (c == NULL)
1140 c = name;
1141 else
1142 c++;
1143
1144 new_len = strlen(ctx->name) + strlen(c) + 2;
1145
1146 if (new_len > ctx->len) {
1147 ctx->name = xrealloc(ctx->name, new_len);
1148 ctx->len = new_len;
1149 }
1150 strcat(ctx->name, ".");
1151 strcat(ctx->name, c);
1152
1153 free(ctx->cdata);
1154 ctx->cdata = NULL;
1155
1156 ctx->userFunc(ctx, 0);
1157 }
1158
1159 static void
1160 xml_end_tag(void *userData, const char *name)
1161 {
1162 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1163 const char *c = strchr(name, ':');
1164 char *ep;
1165
1166 ctx->userFunc(ctx, 1);
1167
1168 if (c == NULL)
1169 c = name;
1170 else
1171 c++;
1172
1173 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1174 *ep = 0;
1175 }
1176
1177 static void
1178 xml_cdata(void *userData, const XML_Char *s, int len)
1179 {
1180 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1181 free(ctx->cdata);
1182 ctx->cdata = xmemdupz(s, len);
1183 }
1184
1185 static struct remote_lock *lock_remote(const char *path, long timeout)
1186 {
1187 struct active_request_slot *slot;
1188 struct slot_results results;
1189 struct buffer out_buffer = { STRBUF_INIT, 0 };
1190 struct strbuf in_buffer = STRBUF_INIT;
1191 char *url;
1192 char *ep;
1193 char timeout_header[25];
1194 struct remote_lock *lock = NULL;
1195 struct curl_slist *dav_headers = NULL;
1196 struct xml_ctx ctx;
1197
1198 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1199 sprintf(url, "%s%s", remote->url, path);
1200
1201 /* Make sure leading directories exist for the remote ref */
1202 ep = strchr(url + strlen(remote->url) + 1, '/');
1203 while (ep) {
1204 *ep = 0;
1205 slot = get_active_slot();
1206 slot->results = &results;
1207 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1208 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1209 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1210 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1211 if (start_active_slot(slot)) {
1212 run_active_slot(slot);
1213 if (results.curl_result != CURLE_OK &&
1214 results.http_code != 405) {
1215 fprintf(stderr,
1216 "Unable to create branch path %s\n",
1217 url);
1218 free(url);
1219 return NULL;
1220 }
1221 } else {
1222 fprintf(stderr, "Unable to start MKCOL request\n");
1223 free(url);
1224 return NULL;
1225 }
1226 *ep = '/';
1227 ep = strchr(ep + 1, '/');
1228 }
1229
1230 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1231
1232 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1233 dav_headers = curl_slist_append(dav_headers, timeout_header);
1234 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1235
1236 slot = get_active_slot();
1237 slot->results = &results;
1238 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1240 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1241 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1244 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1245 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1246 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1247
1248 lock = xcalloc(1, sizeof(*lock));
1249 lock->timeout = -1;
1250
1251 if (start_active_slot(slot)) {
1252 run_active_slot(slot);
1253 if (results.curl_result == CURLE_OK) {
1254 XML_Parser parser = XML_ParserCreate(NULL);
1255 enum XML_Status result;
1256 ctx.name = xcalloc(10, 1);
1257 ctx.len = 0;
1258 ctx.cdata = NULL;
1259 ctx.userFunc = handle_new_lock_ctx;
1260 ctx.userData = lock;
1261 XML_SetUserData(parser, &ctx);
1262 XML_SetElementHandler(parser, xml_start_tag,
1263 xml_end_tag);
1264 XML_SetCharacterDataHandler(parser, xml_cdata);
1265 result = XML_Parse(parser, in_buffer.buf,
1266 in_buffer.len, 1);
1267 free(ctx.name);
1268 if (result != XML_STATUS_OK) {
1269 fprintf(stderr, "XML error: %s\n",
1270 XML_ErrorString(
1271 XML_GetErrorCode(parser)));
1272 lock->timeout = -1;
1273 }
1274 XML_ParserFree(parser);
1275 }
1276 } else {
1277 fprintf(stderr, "Unable to start LOCK request\n");
1278 }
1279
1280 curl_slist_free_all(dav_headers);
1281 strbuf_release(&out_buffer.buf);
1282 strbuf_release(&in_buffer);
1283
1284 if (lock->token == NULL || lock->timeout <= 0) {
1285 free(lock->token);
1286 free(lock->owner);
1287 free(url);
1288 free(lock);
1289 lock = NULL;
1290 } else {
1291 lock->url = url;
1292 lock->start_time = time(NULL);
1293 lock->next = remote->locks;
1294 remote->locks = lock;
1295 }
1296
1297 return lock;
1298 }
1299
1300 static int unlock_remote(struct remote_lock *lock)
1301 {
1302 struct active_request_slot *slot;
1303 struct slot_results results;
1304 struct remote_lock *prev = remote->locks;
1305 char *lock_token_header;
1306 struct curl_slist *dav_headers = NULL;
1307 int rc = 0;
1308
1309 lock_token_header = xmalloc(strlen(lock->token) + 31);
1310 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1311 lock->token);
1312 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1313
1314 slot = get_active_slot();
1315 slot->results = &results;
1316 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1317 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1318 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1319 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1320
1321 if (start_active_slot(slot)) {
1322 run_active_slot(slot);
1323 if (results.curl_result == CURLE_OK)
1324 rc = 1;
1325 else
1326 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1327 results.http_code);
1328 } else {
1329 fprintf(stderr, "Unable to start UNLOCK request\n");
1330 }
1331
1332 curl_slist_free_all(dav_headers);
1333 free(lock_token_header);
1334
1335 if (remote->locks == lock) {
1336 remote->locks = lock->next;
1337 } else {
1338 while (prev && prev->next != lock)
1339 prev = prev->next;
1340 if (prev)
1341 prev->next = prev->next->next;
1342 }
1343
1344 free(lock->owner);
1345 free(lock->url);
1346 free(lock->token);
1347 free(lock);
1348
1349 return rc;
1350 }
1351
1352 static void remove_locks(void)
1353 {
1354 struct remote_lock *lock = remote->locks;
1355
1356 fprintf(stderr, "Removing remote locks...\n");
1357 while (lock) {
1358 unlock_remote(lock);
1359 lock = lock->next;
1360 }
1361 }
1362
1363 static void remove_locks_on_signal(int signo)
1364 {
1365 remove_locks();
1366 signal(signo, SIG_DFL);
1367 raise(signo);
1368 }
1369
1370 static void remote_ls(const char *path, int flags,
1371 void (*userFunc)(struct remote_ls_ctx *ls),
1372 void *userData);
1373
1374 static void process_ls_object(struct remote_ls_ctx *ls)
1375 {
1376 unsigned int *parent = (unsigned int *)ls->userData;
1377 char *path = ls->dentry_name;
1378 char *obj_hex;
1379
1380 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1381 remote_dir_exists[*parent] = 1;
1382 return;
1383 }
1384
1385 if (strlen(path) != 49)
1386 return;
1387 path += 8;
1388 obj_hex = xmalloc(strlen(path));
1389 /* NB: path is not null-terminated, can not use strlcpy here */
1390 memcpy(obj_hex, path, 2);
1391 strcpy(obj_hex + 2, path + 3);
1392 one_remote_object(obj_hex);
1393 free(obj_hex);
1394 }
1395
1396 static void process_ls_ref(struct remote_ls_ctx *ls)
1397 {
1398 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1399 fprintf(stderr, " %s\n", ls->dentry_name);
1400 return;
1401 }
1402
1403 if (!(ls->dentry_flags & IS_DIR))
1404 one_remote_ref(ls->dentry_name);
1405 }
1406
1407 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1408 {
1409 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1410
1411 if (tag_closed) {
1412 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1413 if (ls->dentry_flags & IS_DIR) {
1414 if (ls->flags & PROCESS_DIRS) {
1415 ls->userFunc(ls);
1416 }
1417 if (strcmp(ls->dentry_name, ls->path) &&
1418 ls->flags & RECURSIVE) {
1419 remote_ls(ls->dentry_name,
1420 ls->flags,
1421 ls->userFunc,
1422 ls->userData);
1423 }
1424 } else if (ls->flags & PROCESS_FILES) {
1425 ls->userFunc(ls);
1426 }
1427 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1428 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1429 remote->path_len + 1);
1430 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1431 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1432 ls->dentry_flags |= IS_DIR;
1433 }
1434 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1435 free(ls->dentry_name);
1436 ls->dentry_name = NULL;
1437 ls->dentry_flags = 0;
1438 }
1439 }
1440
1441 static void remote_ls(const char *path, int flags,
1442 void (*userFunc)(struct remote_ls_ctx *ls),
1443 void *userData)
1444 {
1445 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1446 struct active_request_slot *slot;
1447 struct slot_results results;
1448 struct strbuf in_buffer = STRBUF_INIT;
1449 struct buffer out_buffer = { STRBUF_INIT, 0 };
1450 struct curl_slist *dav_headers = NULL;
1451 struct xml_ctx ctx;
1452 struct remote_ls_ctx ls;
1453
1454 ls.flags = flags;
1455 ls.path = xstrdup(path);
1456 ls.dentry_name = NULL;
1457 ls.dentry_flags = 0;
1458 ls.userData = userData;
1459 ls.userFunc = userFunc;
1460
1461 sprintf(url, "%s%s", remote->url, path);
1462
1463 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1464
1465 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1466 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1467
1468 slot = get_active_slot();
1469 slot->results = &results;
1470 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1471 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1472 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1473 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1474 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1475 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1476 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1477 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1478 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1479
1480 if (start_active_slot(slot)) {
1481 run_active_slot(slot);
1482 if (results.curl_result == CURLE_OK) {
1483 XML_Parser parser = XML_ParserCreate(NULL);
1484 enum XML_Status result;
1485 ctx.name = xcalloc(10, 1);
1486 ctx.len = 0;
1487 ctx.cdata = NULL;
1488 ctx.userFunc = handle_remote_ls_ctx;
1489 ctx.userData = &ls;
1490 XML_SetUserData(parser, &ctx);
1491 XML_SetElementHandler(parser, xml_start_tag,
1492 xml_end_tag);
1493 XML_SetCharacterDataHandler(parser, xml_cdata);
1494 result = XML_Parse(parser, in_buffer.buf,
1495 in_buffer.len, 1);
1496 free(ctx.name);
1497
1498 if (result != XML_STATUS_OK) {
1499 fprintf(stderr, "XML error: %s\n",
1500 XML_ErrorString(
1501 XML_GetErrorCode(parser)));
1502 }
1503 XML_ParserFree(parser);
1504 }
1505 } else {
1506 fprintf(stderr, "Unable to start PROPFIND request\n");
1507 }
1508
1509 free(ls.path);
1510 free(url);
1511 strbuf_release(&out_buffer.buf);
1512 strbuf_release(&in_buffer);
1513 curl_slist_free_all(dav_headers);
1514 }
1515
1516 static void get_remote_object_list(unsigned char parent)
1517 {
1518 char path[] = "objects/XX/";
1519 static const char hex[] = "0123456789abcdef";
1520 unsigned int val = parent;
1521
1522 path[8] = hex[val >> 4];
1523 path[9] = hex[val & 0xf];
1524 remote_dir_exists[val] = 0;
1525 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1526 process_ls_object, &val);
1527 }
1528
1529 static int locking_available(void)
1530 {
1531 struct active_request_slot *slot;
1532 struct slot_results results;
1533 struct strbuf in_buffer = STRBUF_INIT;
1534 struct buffer out_buffer = { STRBUF_INIT, 0 };
1535 struct curl_slist *dav_headers = NULL;
1536 struct xml_ctx ctx;
1537 int lock_flags = 0;
1538
1539 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1540
1541 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1542 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1543
1544 slot = get_active_slot();
1545 slot->results = &results;
1546 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1547 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1548 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1549 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1550 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1551 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1552 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1553 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1554 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1555
1556 if (start_active_slot(slot)) {
1557 run_active_slot(slot);
1558 if (results.curl_result == CURLE_OK) {
1559 XML_Parser parser = XML_ParserCreate(NULL);
1560 enum XML_Status result;
1561 ctx.name = xcalloc(10, 1);
1562 ctx.len = 0;
1563 ctx.cdata = NULL;
1564 ctx.userFunc = handle_lockprop_ctx;
1565 ctx.userData = &lock_flags;
1566 XML_SetUserData(parser, &ctx);
1567 XML_SetElementHandler(parser, xml_start_tag,
1568 xml_end_tag);
1569 result = XML_Parse(parser, in_buffer.buf,
1570 in_buffer.len, 1);
1571 free(ctx.name);
1572
1573 if (result != XML_STATUS_OK) {
1574 fprintf(stderr, "XML error: %s\n",
1575 XML_ErrorString(
1576 XML_GetErrorCode(parser)));
1577 lock_flags = 0;
1578 }
1579 XML_ParserFree(parser);
1580 if (!lock_flags)
1581 error("Error: no DAV locking support on %s",
1582 remote->url);
1583
1584 } else {
1585 error("Cannot access URL %s, return code %d",
1586 remote->url, results.curl_result);
1587 lock_flags = 0;
1588 }
1589 } else {
1590 error("Unable to start PROPFIND request on %s", remote->url);
1591 }
1592
1593 strbuf_release(&out_buffer.buf);
1594 strbuf_release(&in_buffer);
1595 curl_slist_free_all(dav_headers);
1596
1597 return lock_flags;
1598 }
1599
1600 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1601 {
1602 struct object_list *entry = xmalloc(sizeof(struct object_list));
1603 entry->item = obj;
1604 entry->next = *p;
1605 *p = entry;
1606 return &entry->next;
1607 }
1608
1609 static struct object_list **process_blob(struct blob *blob,
1610 struct object_list **p,
1611 struct name_path *path,
1612 const char *name)
1613 {
1614 struct object *obj = &blob->object;
1615
1616 obj->flags |= LOCAL;
1617
1618 if (obj->flags & (UNINTERESTING | SEEN))
1619 return p;
1620
1621 obj->flags |= SEEN;
1622 return add_one_object(obj, p);
1623 }
1624
1625 static struct object_list **process_tree(struct tree *tree,
1626 struct object_list **p,
1627 struct name_path *path,
1628 const char *name)
1629 {
1630 struct object *obj = &tree->object;
1631 struct tree_desc desc;
1632 struct name_entry entry;
1633 struct name_path me;
1634
1635 obj->flags |= LOCAL;
1636
1637 if (obj->flags & (UNINTERESTING | SEEN))
1638 return p;
1639 if (parse_tree(tree) < 0)
1640 die("bad tree object %s", sha1_to_hex(obj->sha1));
1641
1642 obj->flags |= SEEN;
1643 name = xstrdup(name);
1644 p = add_one_object(obj, p);
1645 me.up = path;
1646 me.elem = name;
1647 me.elem_len = strlen(name);
1648
1649 init_tree_desc(&desc, tree->buffer, tree->size);
1650
1651 while (tree_entry(&desc, &entry))
1652 switch (object_type(entry.mode)) {
1653 case OBJ_TREE:
1654 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1655 break;
1656 case OBJ_BLOB:
1657 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1658 break;
1659 default:
1660 /* Subproject commit - not in this repository */
1661 break;
1662 }
1663
1664 free(tree->buffer);
1665 tree->buffer = NULL;
1666 return p;
1667 }
1668
1669 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1670 {
1671 int i;
1672 struct commit *commit;
1673 struct object_list **p = &objects;
1674 int count = 0;
1675
1676 while ((commit = get_revision(revs)) != NULL) {
1677 p = process_tree(commit->tree, p, NULL, "");
1678 commit->object.flags |= LOCAL;
1679 if (!(commit->object.flags & UNINTERESTING))
1680 count += add_send_request(&commit->object, lock);
1681 }
1682
1683 for (i = 0; i < revs->pending.nr; i++) {
1684 struct object_array_entry *entry = revs->pending.objects + i;
1685 struct object *obj = entry->item;
1686 const char *name = entry->name;
1687
1688 if (obj->flags & (UNINTERESTING | SEEN))
1689 continue;
1690 if (obj->type == OBJ_TAG) {
1691 obj->flags |= SEEN;
1692 p = add_one_object(obj, p);
1693 continue;
1694 }
1695 if (obj->type == OBJ_TREE) {
1696 p = process_tree((struct tree *)obj, p, NULL, name);
1697 continue;
1698 }
1699 if (obj->type == OBJ_BLOB) {
1700 p = process_blob((struct blob *)obj, p, NULL, name);
1701 continue;
1702 }
1703 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1704 }
1705
1706 while (objects) {
1707 if (!(objects->item->flags & UNINTERESTING))
1708 count += add_send_request(objects->item, lock);
1709 objects = objects->next;
1710 }
1711
1712 return count;
1713 }
1714
1715 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1716 {
1717 struct active_request_slot *slot;
1718 struct slot_results results;
1719 char *if_header;
1720 struct buffer out_buffer = { STRBUF_INIT, 0 };
1721 struct curl_slist *dav_headers = NULL;
1722
1723 if_header = xmalloc(strlen(lock->token) + 25);
1724 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1725 dav_headers = curl_slist_append(dav_headers, if_header);
1726
1727 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1728
1729 slot = get_active_slot();
1730 slot->results = &results;
1731 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1732 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1733 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1734 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1735 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1736 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1737 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1738 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1739 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1740
1741 if (start_active_slot(slot)) {
1742 run_active_slot(slot);
1743 strbuf_release(&out_buffer.buf);
1744 free(if_header);
1745 if (results.curl_result != CURLE_OK) {
1746 fprintf(stderr,
1747 "PUT error: curl result=%d, HTTP code=%ld\n",
1748 results.curl_result, results.http_code);
1749 /* We should attempt recovery? */
1750 return 0;
1751 }
1752 } else {
1753 strbuf_release(&out_buffer.buf);
1754 free(if_header);
1755 fprintf(stderr, "Unable to start PUT request\n");
1756 return 0;
1757 }
1758
1759 return 1;
1760 }
1761
1762 static struct ref *local_refs, **local_tail;
1763 static struct ref *remote_refs, **remote_tail;
1764
1765 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1766 {
1767 struct ref *ref;
1768 int len = strlen(refname) + 1;
1769 ref = xcalloc(1, sizeof(*ref) + len);
1770 hashcpy(ref->new_sha1, sha1);
1771 memcpy(ref->name, refname, len);
1772 *local_tail = ref;
1773 local_tail = &ref->next;
1774 return 0;
1775 }
1776
1777 static void one_remote_ref(char *refname)
1778 {
1779 struct ref *ref;
1780 struct object *obj;
1781
1782 ref = alloc_ref_from_str(refname);
1783
1784 if (http_fetch_ref(remote->url, ref) != 0) {
1785 fprintf(stderr,
1786 "Unable to fetch ref %s from %s\n",
1787 refname, remote->url);
1788 free(ref);
1789 return;
1790 }
1791
1792 /*
1793 * Fetch a copy of the object if it doesn't exist locally - it
1794 * may be required for updating server info later.
1795 */
1796 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1797 obj = lookup_unknown_object(ref->old_sha1);
1798 if (obj) {
1799 fprintf(stderr, " fetch %s for %s\n",
1800 sha1_to_hex(ref->old_sha1), refname);
1801 add_fetch_request(obj);
1802 }
1803 }
1804
1805 *remote_tail = ref;
1806 remote_tail = &ref->next;
1807 }
1808
1809 static void get_local_heads(void)
1810 {
1811 local_tail = &local_refs;
1812 for_each_ref(one_local_ref, NULL);
1813 }
1814
1815 static void get_dav_remote_heads(void)
1816 {
1817 remote_tail = &remote_refs;
1818 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1819 }
1820
1821 static int is_zero_sha1(const unsigned char *sha1)
1822 {
1823 int i;
1824
1825 for (i = 0; i < 20; i++) {
1826 if (*sha1++)
1827 return 0;
1828 }
1829 return 1;
1830 }
1831
1832 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1833 {
1834 while (list) {
1835 struct commit_list *temp = list;
1836 temp->item->object.flags &= ~mark;
1837 list = temp->next;
1838 free(temp);
1839 }
1840 }
1841
1842 static int ref_newer(const unsigned char *new_sha1,
1843 const unsigned char *old_sha1)
1844 {
1845 struct object *o;
1846 struct commit *old, *new;
1847 struct commit_list *list, *used;
1848 int found = 0;
1849
1850 /* Both new and old must be commit-ish and new is descendant of
1851 * old. Otherwise we require --force.
1852 */
1853 o = deref_tag(parse_object(old_sha1), NULL, 0);
1854 if (!o || o->type != OBJ_COMMIT)
1855 return 0;
1856 old = (struct commit *) o;
1857
1858 o = deref_tag(parse_object(new_sha1), NULL, 0);
1859 if (!o || o->type != OBJ_COMMIT)
1860 return 0;
1861 new = (struct commit *) o;
1862
1863 if (parse_commit(new) < 0)
1864 return 0;
1865
1866 used = list = NULL;
1867 commit_list_insert(new, &list);
1868 while (list) {
1869 new = pop_most_recent_commit(&list, TMP_MARK);
1870 commit_list_insert(new, &used);
1871 if (new == old) {
1872 found = 1;
1873 break;
1874 }
1875 }
1876 unmark_and_free(list, TMP_MARK);
1877 unmark_and_free(used, TMP_MARK);
1878 return found;
1879 }
1880
1881 static void mark_edge_parents_uninteresting(struct commit *commit)
1882 {
1883 struct commit_list *parents;
1884
1885 for (parents = commit->parents; parents; parents = parents->next) {
1886 struct commit *parent = parents->item;
1887 if (!(parent->object.flags & UNINTERESTING))
1888 continue;
1889 mark_tree_uninteresting(parent->tree);
1890 }
1891 }
1892
1893 static void mark_edges_uninteresting(struct commit_list *list)
1894 {
1895 for ( ; list; list = list->next) {
1896 struct commit *commit = list->item;
1897
1898 if (commit->object.flags & UNINTERESTING) {
1899 mark_tree_uninteresting(commit->tree);
1900 continue;
1901 }
1902 mark_edge_parents_uninteresting(commit);
1903 }
1904 }
1905
1906 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1907 {
1908 struct strbuf *buf = (struct strbuf *)ls->userData;
1909 struct object *o;
1910 int len;
1911 char *ref_info;
1912 struct ref *ref;
1913
1914 ref = alloc_ref_from_str(ls->dentry_name);
1915
1916 if (http_fetch_ref(remote->url, ref) != 0) {
1917 fprintf(stderr,
1918 "Unable to fetch ref %s from %s\n",
1919 ls->dentry_name, remote->url);
1920 aborted = 1;
1921 free(ref);
1922 return;
1923 }
1924
1925 o = parse_object(ref->old_sha1);
1926 if (!o) {
1927 fprintf(stderr,
1928 "Unable to parse object %s for remote ref %s\n",
1929 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1930 aborted = 1;
1931 free(ref);
1932 return;
1933 }
1934
1935 len = strlen(ls->dentry_name) + 42;
1936 ref_info = xcalloc(len + 1, 1);
1937 sprintf(ref_info, "%s %s\n",
1938 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1939 fwrite_buffer(ref_info, 1, len, buf);
1940 free(ref_info);
1941
1942 if (o->type == OBJ_TAG) {
1943 o = deref_tag(o, ls->dentry_name, 0);
1944 if (o) {
1945 len = strlen(ls->dentry_name) + 45;
1946 ref_info = xcalloc(len + 1, 1);
1947 sprintf(ref_info, "%s %s^{}\n",
1948 sha1_to_hex(o->sha1), ls->dentry_name);
1949 fwrite_buffer(ref_info, 1, len, buf);
1950 free(ref_info);
1951 }
1952 }
1953 free(ref);
1954 }
1955
1956 static void update_remote_info_refs(struct remote_lock *lock)
1957 {
1958 struct buffer buffer = { STRBUF_INIT, 0 };
1959 struct active_request_slot *slot;
1960 struct slot_results results;
1961 char *if_header;
1962 struct curl_slist *dav_headers = NULL;
1963
1964 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1965 add_remote_info_ref, &buffer.buf);
1966 if (!aborted) {
1967 if_header = xmalloc(strlen(lock->token) + 25);
1968 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1969 dav_headers = curl_slist_append(dav_headers, if_header);
1970
1971 slot = get_active_slot();
1972 slot->results = &results;
1973 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1974 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1975 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1976 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1977 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1978 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1979 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1980 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1981 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1982
1983 if (start_active_slot(slot)) {
1984 run_active_slot(slot);
1985 if (results.curl_result != CURLE_OK) {
1986 fprintf(stderr,
1987 "PUT error: curl result=%d, HTTP code=%ld\n",
1988 results.curl_result, results.http_code);
1989 }
1990 }
1991 free(if_header);
1992 }
1993 strbuf_release(&buffer.buf);
1994 }
1995
1996 static int remote_exists(const char *path)
1997 {
1998 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1999 struct active_request_slot *slot;
2000 struct slot_results results;
2001 int ret = -1;
2002
2003 sprintf(url, "%s%s", remote->url, path);
2004
2005 slot = get_active_slot();
2006 slot->results = &results;
2007 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2008 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2009
2010 if (start_active_slot(slot)) {
2011 run_active_slot(slot);
2012 if (results.http_code == 404)
2013 ret = 0;
2014 else if (results.curl_result == CURLE_OK)
2015 ret = 1;
2016 else
2017 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2018 } else {
2019 fprintf(stderr, "Unable to start HEAD request\n");
2020 }
2021
2022 free(url);
2023 return ret;
2024 }
2025
2026 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2027 {
2028 char *url;
2029 struct strbuf buffer = STRBUF_INIT;
2030 struct active_request_slot *slot;
2031 struct slot_results results;
2032
2033 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2034 sprintf(url, "%s%s", remote->url, path);
2035
2036 slot = get_active_slot();
2037 slot->results = &results;
2038 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2039 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2040 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2041 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2042 if (start_active_slot(slot)) {
2043 run_active_slot(slot);
2044 if (results.curl_result != CURLE_OK) {
2045 die("Couldn't get %s for remote symref\n%s",
2046 url, curl_errorstr);
2047 }
2048 } else {
2049 die("Unable to start remote symref request");
2050 }
2051 free(url);
2052
2053 free(*symref);
2054 *symref = NULL;
2055 hashclr(sha1);
2056
2057 if (buffer.len == 0)
2058 return;
2059
2060 /* If it's a symref, set the refname; otherwise try for a sha1 */
2061 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2062 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2063 } else {
2064 get_sha1_hex(buffer.buf, sha1);
2065 }
2066
2067 strbuf_release(&buffer);
2068 }
2069
2070 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2071 {
2072 struct commit *head = lookup_commit(head_sha1);
2073 struct commit *branch = lookup_commit(branch_sha1);
2074 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2075
2076 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2077 }
2078
2079 static int delete_remote_branch(char *pattern, int force)
2080 {
2081 struct ref *refs = remote_refs;
2082 struct ref *remote_ref = NULL;
2083 unsigned char head_sha1[20];
2084 char *symref = NULL;
2085 int match;
2086 int patlen = strlen(pattern);
2087 int i;
2088 struct active_request_slot *slot;
2089 struct slot_results results;
2090 char *url;
2091
2092 /* Find the remote branch(es) matching the specified branch name */
2093 for (match = 0; refs; refs = refs->next) {
2094 char *name = refs->name;
2095 int namelen = strlen(name);
2096 if (namelen < patlen ||
2097 memcmp(name + namelen - patlen, pattern, patlen))
2098 continue;
2099 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2100 continue;
2101 match++;
2102 remote_ref = refs;
2103 }
2104 if (match == 0)
2105 return error("No remote branch matches %s", pattern);
2106 if (match != 1)
2107 return error("More than one remote branch matches %s",
2108 pattern);
2109
2110 /*
2111 * Remote HEAD must be a symref (not exactly foolproof; a remote
2112 * symlink to a symref will look like a symref)
2113 */
2114 fetch_symref("HEAD", &symref, head_sha1);
2115 if (!symref)
2116 return error("Remote HEAD is not a symref");
2117
2118 /* Remote branch must not be the remote HEAD */
2119 for (i=0; symref && i<MAXDEPTH; i++) {
2120 if (!strcmp(remote_ref->name, symref))
2121 return error("Remote branch %s is the current HEAD",
2122 remote_ref->name);
2123 fetch_symref(symref, &symref, head_sha1);
2124 }
2125
2126 /* Run extra sanity checks if delete is not forced */
2127 if (!force) {
2128 /* Remote HEAD must resolve to a known object */
2129 if (symref)
2130 return error("Remote HEAD symrefs too deep");
2131 if (is_zero_sha1(head_sha1))
2132 return error("Unable to resolve remote HEAD");
2133 if (!has_sha1_file(head_sha1))
2134 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2135
2136 /* Remote branch must resolve to a known object */
2137 if (is_zero_sha1(remote_ref->old_sha1))
2138 return error("Unable to resolve remote branch %s",
2139 remote_ref->name);
2140 if (!has_sha1_file(remote_ref->old_sha1))
2141 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));
2142
2143 /* Remote branch must be an ancestor of remote HEAD */
2144 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2145 return error("The branch '%s' is not an ancestor "
2146 "of your current HEAD.\n"
2147 "If you are sure you want to delete it,"
2148 " run:\n\t'git http-push -D %s %s'",
2149 remote_ref->name, remote->url, pattern);
2150 }
2151 }
2152
2153 /* Send delete request */
2154 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2155 if (dry_run)
2156 return 0;
2157 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2158 sprintf(url, "%s%s", remote->url, remote_ref->name);
2159 slot = get_active_slot();
2160 slot->results = &results;
2161 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2162 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2163 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2164 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2165 if (start_active_slot(slot)) {
2166 run_active_slot(slot);
2167 free(url);
2168 if (results.curl_result != CURLE_OK)
2169 return error("DELETE request failed (%d/%ld)\n",
2170 results.curl_result, results.http_code);
2171 } else {
2172 free(url);
2173 return error("Unable to start DELETE request");
2174 }
2175
2176 return 0;
2177 }
2178
2179 int main(int argc, char **argv)
2180 {
2181 struct transfer_request *request;
2182 struct transfer_request *next_request;
2183 int nr_refspec = 0;
2184 char **refspec = NULL;
2185 struct remote_lock *ref_lock = NULL;
2186 struct remote_lock *info_ref_lock = NULL;
2187 struct rev_info revs;
2188 int delete_branch = 0;
2189 int force_delete = 0;
2190 int objects_to_send;
2191 int rc = 0;
2192 int i;
2193 int new_refs;
2194 struct ref *ref;
2195 char *rewritten_url = NULL;
2196
2197 setup_git_directory();
2198
2199 remote = xcalloc(sizeof(*remote), 1);
2200
2201 argv++;
2202 for (i = 1; i < argc; i++, argv++) {
2203 char *arg = *argv;
2204
2205 if (*arg == '-') {
2206 if (!strcmp(arg, "--all")) {
2207 push_all = MATCH_REFS_ALL;
2208 continue;
2209 }
2210 if (!strcmp(arg, "--force")) {
2211 force_all = 1;
2212 continue;
2213 }
2214 if (!strcmp(arg, "--dry-run")) {
2215 dry_run = 1;
2216 continue;
2217 }
2218 if (!strcmp(arg, "--verbose")) {
2219 push_verbosely = 1;
2220 continue;
2221 }
2222 if (!strcmp(arg, "-d")) {
2223 delete_branch = 1;
2224 continue;
2225 }
2226 if (!strcmp(arg, "-D")) {
2227 delete_branch = 1;
2228 force_delete = 1;
2229 continue;
2230 }
2231 }
2232 if (!remote->url) {
2233 char *path = strstr(arg, "//");
2234 remote->url = arg;
2235 if (path) {
2236 path = strchr(path+2, '/');
2237 if (path)
2238 remote->path_len = strlen(path);
2239 }
2240 continue;
2241 }
2242 refspec = argv;
2243 nr_refspec = argc - i;
2244 break;
2245 }
2246
2247 #ifndef USE_CURL_MULTI
2248 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2249 #endif
2250
2251 if (!remote->url)
2252 usage(http_push_usage);
2253
2254 if (delete_branch && nr_refspec != 1)
2255 die("You must specify only one branch name when deleting a remote branch");
2256
2257 memset(remote_dir_exists, -1, 256);
2258
2259 http_init(NULL);
2260
2261 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2262
2263 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2264 rewritten_url = malloc(strlen(remote->url)+2);
2265 strcpy(rewritten_url, remote->url);
2266 strcat(rewritten_url, "/");
2267 remote->url = rewritten_url;
2268 ++remote->path_len;
2269 }
2270
2271 /* Verify DAV compliance/lock support */
2272 if (!locking_available()) {
2273 rc = 1;
2274 goto cleanup;
2275 }
2276
2277 signal(SIGINT, remove_locks_on_signal);
2278 signal(SIGHUP, remove_locks_on_signal);
2279 signal(SIGQUIT, remove_locks_on_signal);
2280 signal(SIGTERM, remove_locks_on_signal);
2281
2282 /* Check whether the remote has server info files */
2283 remote->can_update_info_refs = 0;
2284 remote->has_info_refs = remote_exists("info/refs");
2285 remote->has_info_packs = remote_exists("objects/info/packs");
2286 if (remote->has_info_refs) {
2287 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2288 if (info_ref_lock)
2289 remote->can_update_info_refs = 1;
2290 else {
2291 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2292 rc = 1;
2293 goto cleanup;
2294 }
2295 }
2296 if (remote->has_info_packs)
2297 fetch_indices();
2298
2299 /* Get a list of all local and remote heads to validate refspecs */
2300 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 free(new_sha1_hex);
2412 if (old_sha1_hex) {
2413 free(old_sha1_hex);
2414 commit_argv[1] = NULL;
2415 }
2416
2417 /* Generate a list of objects that need to be pushed */
2418 pushing = 0;
2419 if (prepare_revision_walk(&revs))
2420 die("revision walk setup failed");
2421 mark_edges_uninteresting(revs.commits);
2422 objects_to_send = get_delta(&revs, ref_lock);
2423 finish_all_active_slots();
2424
2425 /* Push missing objects to remote, this would be a
2426 convenient time to pack them first if appropriate. */
2427 pushing = 1;
2428 if (objects_to_send)
2429 fprintf(stderr, " sending %d objects\n",
2430 objects_to_send);
2431 #ifdef USE_CURL_MULTI
2432 fill_active_slots();
2433 add_fill_function(NULL, fill_active_slot);
2434 #endif
2435 do {
2436 finish_all_active_slots();
2437 #ifdef USE_CURL_MULTI
2438 fill_active_slots();
2439 #endif
2440 } while (request_queue_head && !aborted);
2441
2442 /* Update the remote branch if all went well */
2443 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2444 rc = 1;
2445
2446 if (!rc)
2447 fprintf(stderr, " done\n");
2448 unlock_remote(ref_lock);
2449 check_locks();
2450 }
2451
2452 /* Update remote server info if appropriate */
2453 if (remote->has_info_refs && new_refs) {
2454 if (info_ref_lock && remote->can_update_info_refs) {
2455 fprintf(stderr, "Updating remote server info\n");
2456 if (!dry_run)
2457 update_remote_info_refs(info_ref_lock);
2458 } else {
2459 fprintf(stderr, "Unable to update server info\n");
2460 }
2461 }
2462
2463 cleanup:
2464 free(rewritten_url);
2465 if (info_ref_lock)
2466 unlock_remote(info_ref_lock);
2467 free(remote);
2468
2469 curl_slist_free_all(no_pragma_header);
2470
2471 http_cleanup();
2472
2473 request = request_queue_head;
2474 while (request != NULL) {
2475 next_request = request->next;
2476 release_request(request);
2477 request = next_request;
2478 }
2479
2480 return rc;
2481 }