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git-svn: avoid filling up the disk with temp files.
[git.git] / http-push.c
blob665712a85de3fb4bba3a879753b60ece64a4243a
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
14 #include <expat.h>
15
16 static const char http_push_usage[] =
17 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
18
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21 XML_STATUS_OK = 1,
22 XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK 1
25 #define XML_STATUS_ERROR 0
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
39
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
44
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
55
56 /* DAV request body templates */
57 #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>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #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>"
60
61 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
63
64 /* bits #0-15 in revision.h */
65
66 #define LOCAL (1u<<16)
67 #define REMOTE (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING (1u<<19)
70
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
73
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
77
78 static struct curl_slist *no_pragma_header;
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 int path_len;
91 int has_info_refs;
92 int can_update_info_refs;
93 int has_info_packs;
94 struct packed_git *packs;
95 struct remote_lock *locks;
96 };
97
98 static struct repo *remote;
99
100 enum transfer_state {
101 NEED_FETCH,
102 RUN_FETCH_LOOSE,
103 RUN_FETCH_PACKED,
104 NEED_PUSH,
105 RUN_MKCOL,
106 RUN_PUT,
107 RUN_MOVE,
108 ABORTED,
109 COMPLETE,
110 };
111
112 struct transfer_request
113 {
114 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 char filename[PATH_MAX];
121 char tmpfile[PATH_MAX];
122 int local_fileno;
123 FILE *local_stream;
124 enum transfer_state state;
125 CURLcode curl_result;
126 char errorstr[CURL_ERROR_SIZE];
127 long http_code;
128 unsigned char real_sha1[20];
129 SHA_CTX c;
130 z_stream stream;
131 int zret;
132 int rename;
133 void *userData;
134 struct active_request_slot *slot;
135 struct transfer_request *next;
136 };
137
138 static struct transfer_request *request_queue_head;
139
140 struct xml_ctx
141 {
142 char *name;
143 int len;
144 char *cdata;
145 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
146 void *userData;
147 };
148
149 struct remote_lock
150 {
151 char *url;
152 char *owner;
153 char *token;
154 time_t start_time;
155 long timeout;
156 int refreshing;
157 struct remote_lock *next;
158 };
159
160 /* Flags that control remote_ls processing */
161 #define PROCESS_FILES (1u << 0)
162 #define PROCESS_DIRS (1u << 1)
163 #define RECURSIVE (1u << 2)
164
165 /* Flags that remote_ls passes to callback functions */
166 #define IS_DIR (1u << 0)
167
168 struct remote_ls_ctx
169 {
170 char *path;
171 void (*userFunc)(struct remote_ls_ctx *ls);
172 void *userData;
173 int flags;
174 char *dentry_name;
175 int dentry_flags;
176 struct remote_ls_ctx *parent;
177 };
178
179 static void finish_request(struct transfer_request *request);
180 static void release_request(struct transfer_request *request);
181
182 static void process_response(void *callback_data)
183 {
184 struct transfer_request *request =
185 (struct transfer_request *)callback_data;
186
187 finish_request(request);
188 }
189
190 #ifdef USE_CURL_MULTI
191 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
192 void *data)
193 {
194 unsigned char expn[4096];
195 size_t size = eltsize * nmemb;
196 int posn = 0;
197 struct transfer_request *request = (struct transfer_request *)data;
198 do {
199 ssize_t retval = xwrite(request->local_fileno,
200 (char *) ptr + posn, size - posn);
201 if (retval < 0)
202 return posn;
203 posn += retval;
204 } while (posn < size);
205
206 request->stream.avail_in = size;
207 request->stream.next_in = ptr;
208 do {
209 request->stream.next_out = expn;
210 request->stream.avail_out = sizeof(expn);
211 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
212 SHA1_Update(&request->c, expn,
213 sizeof(expn) - request->stream.avail_out);
214 } while (request->stream.avail_in && request->zret == Z_OK);
215 data_received++;
216 return size;
217 }
218
219 static void start_fetch_loose(struct transfer_request *request)
220 {
221 char *hex = sha1_to_hex(request->obj->sha1);
222 char *filename;
223 char prevfile[PATH_MAX];
224 char *url;
225 char *posn;
226 int prevlocal;
227 unsigned char prev_buf[PREV_BUF_SIZE];
228 ssize_t prev_read = 0;
229 long prev_posn = 0;
230 char range[RANGE_HEADER_SIZE];
231 struct curl_slist *range_header = NULL;
232 struct active_request_slot *slot;
233
234 filename = sha1_file_name(request->obj->sha1);
235 snprintf(request->filename, sizeof(request->filename), "%s", filename);
236 snprintf(request->tmpfile, sizeof(request->tmpfile),
237 "%s.temp", filename);
238
239 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
240 unlink(prevfile);
241 rename(request->tmpfile, prevfile);
242 unlink(request->tmpfile);
243
244 if (request->local_fileno != -1)
245 error("fd leakage in start: %d", request->local_fileno);
246 request->local_fileno = open(request->tmpfile,
247 O_WRONLY | O_CREAT | O_EXCL, 0666);
248 /* This could have failed due to the "lazy directory creation";
249 * try to mkdir the last path component.
250 */
251 if (request->local_fileno < 0 && errno == ENOENT) {
252 char *dir = strrchr(request->tmpfile, '/');
253 if (dir) {
254 *dir = 0;
255 mkdir(request->tmpfile, 0777);
256 *dir = '/';
257 }
258 request->local_fileno = open(request->tmpfile,
259 O_WRONLY | O_CREAT | O_EXCL, 0666);
260 }
261
262 if (request->local_fileno < 0) {
263 request->state = ABORTED;
264 error("Couldn't create temporary file %s for %s: %s",
265 request->tmpfile, request->filename, strerror(errno));
266 return;
267 }
268
269 memset(&request->stream, 0, sizeof(request->stream));
270
271 inflateInit(&request->stream);
272
273 SHA1_Init(&request->c);
274
275 url = xmalloc(strlen(remote->url) + 50);
276 request->url = xmalloc(strlen(remote->url) + 50);
277 strcpy(url, remote->url);
278 posn = url + strlen(remote->url);
279 strcpy(posn, "objects/");
280 posn += 8;
281 memcpy(posn, hex, 2);
282 posn += 2;
283 *(posn++) = '/';
284 strcpy(posn, hex + 2);
285 strcpy(request->url, url);
286
287 /* If a previous temp file is present, process what was already
288 fetched. */
289 prevlocal = open(prevfile, O_RDONLY);
290 if (prevlocal != -1) {
291 do {
292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
293 if (prev_read>0) {
294 if (fwrite_sha1_file(prev_buf,
295 1,
296 prev_read,
297 request) == prev_read) {
298 prev_posn += prev_read;
299 } else {
300 prev_read = -1;
301 }
302 }
303 } while (prev_read > 0);
304 close(prevlocal);
305 }
306 unlink(prevfile);
307
308 /* Reset inflate/SHA1 if there was an error reading the previous temp
309 file; also rewind to the beginning of the local file. */
310 if (prev_read == -1) {
311 memset(&request->stream, 0, sizeof(request->stream));
312 inflateInit(&request->stream);
313 SHA1_Init(&request->c);
314 if (prev_posn>0) {
315 prev_posn = 0;
316 lseek(request->local_fileno, 0, SEEK_SET);
317 ftruncate(request->local_fileno, 0);
318 }
319 }
320
321 slot = get_active_slot();
322 slot->callback_func = process_response;
323 slot->callback_data = request;
324 request->slot = slot;
325
326 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
327 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
328 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
329 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
330 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
331
332 /* If we have successfully processed data from a previous fetch
333 attempt, only fetch the data we don't already have. */
334 if (prev_posn>0) {
335 if (push_verbosely)
336 fprintf(stderr,
337 "Resuming fetch of object %s at byte %ld\n",
338 hex, prev_posn);
339 sprintf(range, "Range: bytes=%ld-", prev_posn);
340 range_header = curl_slist_append(range_header, range);
341 curl_easy_setopt(slot->curl,
342 CURLOPT_HTTPHEADER, range_header);
343 }
344
345 /* Try to get the request started, abort the request on error */
346 request->state = RUN_FETCH_LOOSE;
347 if (!start_active_slot(slot)) {
348 fprintf(stderr, "Unable to start GET request\n");
349 remote->can_update_info_refs = 0;
350 release_request(request);
351 }
352 }
353
354 static void start_mkcol(struct transfer_request *request)
355 {
356 char *hex = sha1_to_hex(request->obj->sha1);
357 struct active_request_slot *slot;
358 char *posn;
359
360 request->url = xmalloc(strlen(remote->url) + 13);
361 strcpy(request->url, remote->url);
362 posn = request->url + strlen(remote->url);
363 strcpy(posn, "objects/");
364 posn += 8;
365 memcpy(posn, hex, 2);
366 posn += 2;
367 strcpy(posn, "/");
368
369 slot = get_active_slot();
370 slot->callback_func = process_response;
371 slot->callback_data = request;
372 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
373 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
374 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
375 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
376 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
377
378 if (start_active_slot(slot)) {
379 request->slot = slot;
380 request->state = RUN_MKCOL;
381 } else {
382 request->state = ABORTED;
383 free(request->url);
384 request->url = NULL;
385 }
386 }
387 #endif
388
389 static void start_fetch_packed(struct transfer_request *request)
390 {
391 char *url;
392 struct packed_git *target;
393 FILE *packfile;
394 char *filename;
395 long prev_posn = 0;
396 char range[RANGE_HEADER_SIZE];
397 struct curl_slist *range_header = NULL;
398
399 struct transfer_request *check_request = request_queue_head;
400 struct active_request_slot *slot;
401
402 target = find_sha1_pack(request->obj->sha1, remote->packs);
403 if (!target) {
404 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
405 remote->can_update_info_refs = 0;
406 release_request(request);
407 return;
408 }
409
410 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
411 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
412
413 filename = sha1_pack_name(target->sha1);
414 snprintf(request->filename, sizeof(request->filename), "%s", filename);
415 snprintf(request->tmpfile, sizeof(request->tmpfile),
416 "%s.temp", filename);
417
418 url = xmalloc(strlen(remote->url) + 64);
419 sprintf(url, "%sobjects/pack/pack-%s.pack",
420 remote->url, sha1_to_hex(target->sha1));
421
422 /* Make sure there isn't another open request for this pack */
423 while (check_request) {
424 if (check_request->state == RUN_FETCH_PACKED &&
425 !strcmp(check_request->url, url)) {
426 free(url);
427 release_request(request);
428 return;
429 }
430 check_request = check_request->next;
431 }
432
433 packfile = fopen(request->tmpfile, "a");
434 if (!packfile) {
435 fprintf(stderr, "Unable to open local file %s for pack",
436 request->tmpfile);
437 remote->can_update_info_refs = 0;
438 free(url);
439 return;
440 }
441
442 slot = get_active_slot();
443 slot->callback_func = process_response;
444 slot->callback_data = request;
445 request->slot = slot;
446 request->local_stream = packfile;
447 request->userData = target;
448
449 request->url = url;
450 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
451 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
452 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
454 slot->local = packfile;
455
456 /* If there is data present from a previous transfer attempt,
457 resume where it left off */
458 prev_posn = ftell(packfile);
459 if (prev_posn>0) {
460 if (push_verbosely)
461 fprintf(stderr,
462 "Resuming fetch of pack %s at byte %ld\n",
463 sha1_to_hex(target->sha1), prev_posn);
464 sprintf(range, "Range: bytes=%ld-", prev_posn);
465 range_header = curl_slist_append(range_header, range);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
467 }
468
469 /* Try to get the request started, abort the request on error */
470 request->state = RUN_FETCH_PACKED;
471 if (!start_active_slot(slot)) {
472 fprintf(stderr, "Unable to start GET request\n");
473 remote->can_update_info_refs = 0;
474 release_request(request);
475 }
476 }
477
478 static void start_put(struct transfer_request *request)
479 {
480 char *hex = sha1_to_hex(request->obj->sha1);
481 struct active_request_slot *slot;
482 char *posn;
483 enum object_type type;
484 char hdr[50];
485 void *unpacked;
486 unsigned long len;
487 int hdrlen;
488 ssize_t size;
489 z_stream stream;
490
491 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
492 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
493
494 /* Set it up */
495 memset(&stream, 0, sizeof(stream));
496 deflateInit(&stream, zlib_compression_level);
497 size = deflateBound(&stream, len + hdrlen);
498 strbuf_init(&request->buffer.buf, size);
499 request->buffer.posn = 0;
500
501 /* Compress it */
502 stream.next_out = (unsigned char *)request->buffer.buf.buf;
503 stream.avail_out = size;
504
505 /* First header.. */
506 stream.next_in = (void *)hdr;
507 stream.avail_in = hdrlen;
508 while (deflate(&stream, 0) == Z_OK)
509 /* nothing */;
510
511 /* Then the data itself.. */
512 stream.next_in = unpacked;
513 stream.avail_in = len;
514 while (deflate(&stream, Z_FINISH) == Z_OK)
515 /* nothing */;
516 deflateEnd(&stream);
517 free(unpacked);
518
519 request->buffer.buf.len = stream.total_out;
520
521 request->url = xmalloc(strlen(remote->url) +
522 strlen(request->lock->token) + 51);
523 strcpy(request->url, remote->url);
524 posn = request->url + strlen(remote->url);
525 strcpy(posn, "objects/");
526 posn += 8;
527 memcpy(posn, hex, 2);
528 posn += 2;
529 *(posn++) = '/';
530 strcpy(posn, hex + 2);
531 request->dest = xmalloc(strlen(request->url) + 14);
532 sprintf(request->dest, "Destination: %s", request->url);
533 posn += 38;
534 *(posn++) = '_';
535 strcpy(posn, request->lock->token);
536
537 slot = get_active_slot();
538 slot->callback_func = process_response;
539 slot->callback_data = request;
540 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
541 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
543 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
544 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
545 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
547 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
548 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
549
550 if (start_active_slot(slot)) {
551 request->slot = slot;
552 request->state = RUN_PUT;
553 } else {
554 request->state = ABORTED;
555 free(request->url);
556 request->url = NULL;
557 }
558 }
559
560 static void start_move(struct transfer_request *request)
561 {
562 struct active_request_slot *slot;
563 struct curl_slist *dav_headers = NULL;
564
565 slot = get_active_slot();
566 slot->callback_func = process_response;
567 slot->callback_data = request;
568 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
569 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
570 dav_headers = curl_slist_append(dav_headers, request->dest);
571 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
572 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
573 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
574 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
575
576 if (start_active_slot(slot)) {
577 request->slot = slot;
578 request->state = RUN_MOVE;
579 } else {
580 request->state = ABORTED;
581 free(request->url);
582 request->url = NULL;
583 }
584 }
585
586 static int refresh_lock(struct remote_lock *lock)
587 {
588 struct active_request_slot *slot;
589 struct slot_results results;
590 char *if_header;
591 char timeout_header[25];
592 struct curl_slist *dav_headers = NULL;
593 int rc = 0;
594
595 lock->refreshing = 1;
596
597 if_header = xmalloc(strlen(lock->token) + 25);
598 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
599 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
600 dav_headers = curl_slist_append(dav_headers, if_header);
601 dav_headers = curl_slist_append(dav_headers, timeout_header);
602
603 slot = get_active_slot();
604 slot->results = &results;
605 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
606 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
607 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
608 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
609 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
610
611 if (start_active_slot(slot)) {
612 run_active_slot(slot);
613 if (results.curl_result != CURLE_OK) {
614 fprintf(stderr, "LOCK HTTP error %ld\n",
615 results.http_code);
616 } else {
617 lock->start_time = time(NULL);
618 rc = 1;
619 }
620 }
621
622 lock->refreshing = 0;
623 curl_slist_free_all(dav_headers);
624 free(if_header);
625
626 return rc;
627 }
628
629 static void check_locks(void)
630 {
631 struct remote_lock *lock = remote->locks;
632 time_t current_time = time(NULL);
633 int time_remaining;
634
635 while (lock) {
636 time_remaining = lock->start_time + lock->timeout -
637 current_time;
638 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
639 if (!refresh_lock(lock)) {
640 fprintf(stderr,
641 "Unable to refresh lock for %s\n",
642 lock->url);
643 aborted = 1;
644 return;
645 }
646 }
647 lock = lock->next;
648 }
649 }
650
651 static void release_request(struct transfer_request *request)
652 {
653 struct transfer_request *entry = request_queue_head;
654
655 if (request == request_queue_head) {
656 request_queue_head = request->next;
657 } else {
658 while (entry->next != NULL && entry->next != request)
659 entry = entry->next;
660 if (entry->next == request)
661 entry->next = entry->next->next;
662 }
663
664 if (request->local_fileno != -1)
665 close(request->local_fileno);
666 if (request->local_stream)
667 fclose(request->local_stream);
668 free(request->url);
669 free(request);
670 }
671
672 static void finish_request(struct transfer_request *request)
673 {
674 struct stat st;
675 struct packed_git *target;
676 struct packed_git **lst;
677
678 request->curl_result = request->slot->curl_result;
679 request->http_code = request->slot->http_code;
680 request->slot = NULL;
681
682 /* Keep locks active */
683 check_locks();
684
685 if (request->headers != NULL)
686 curl_slist_free_all(request->headers);
687
688 /* URL is reused for MOVE after PUT */
689 if (request->state != RUN_PUT) {
690 free(request->url);
691 request->url = NULL;
692 }
693
694 if (request->state == RUN_MKCOL) {
695 if (request->curl_result == CURLE_OK ||
696 request->http_code == 405) {
697 remote_dir_exists[request->obj->sha1[0]] = 1;
698 start_put(request);
699 } else {
700 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
701 sha1_to_hex(request->obj->sha1),
702 request->curl_result, request->http_code);
703 request->state = ABORTED;
704 aborted = 1;
705 }
706 } else if (request->state == RUN_PUT) {
707 if (request->curl_result == CURLE_OK) {
708 start_move(request);
709 } else {
710 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
711 sha1_to_hex(request->obj->sha1),
712 request->curl_result, request->http_code);
713 request->state = ABORTED;
714 aborted = 1;
715 }
716 } else if (request->state == RUN_MOVE) {
717 if (request->curl_result == CURLE_OK) {
718 if (push_verbosely)
719 fprintf(stderr, " sent %s\n",
720 sha1_to_hex(request->obj->sha1));
721 request->obj->flags |= REMOTE;
722 release_request(request);
723 } else {
724 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_FETCH_LOOSE) {
731 fchmod(request->local_fileno, 0444);
732 close(request->local_fileno); request->local_fileno = -1;
733
734 if (request->curl_result != CURLE_OK &&
735 request->http_code != 416) {
736 if (stat(request->tmpfile, &st) == 0) {
737 if (st.st_size == 0)
738 unlink(request->tmpfile);
739 }
740 } else {
741 if (request->http_code == 416)
742 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
743
744 inflateEnd(&request->stream);
745 SHA1_Final(request->real_sha1, &request->c);
746 if (request->zret != Z_STREAM_END) {
747 unlink(request->tmpfile);
748 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
749 unlink(request->tmpfile);
750 } else {
751 request->rename =
752 move_temp_to_file(
753 request->tmpfile,
754 request->filename);
755 if (request->rename == 0) {
756 request->obj->flags |= (LOCAL | REMOTE);
757 }
758 }
759 }
760
761 /* Try fetching packed if necessary */
762 if (request->obj->flags & LOCAL)
763 release_request(request);
764 else
765 start_fetch_packed(request);
766
767 } else if (request->state == RUN_FETCH_PACKED) {
768 if (request->curl_result != CURLE_OK) {
769 fprintf(stderr, "Unable to get pack file %s\n%s",
770 request->url, curl_errorstr);
771 remote->can_update_info_refs = 0;
772 } else {
773 off_t pack_size = ftell(request->local_stream);
774
775 fclose(request->local_stream);
776 request->local_stream = NULL;
777 if (!move_temp_to_file(request->tmpfile,
778 request->filename)) {
779 target = (struct packed_git *)request->userData;
780 target->pack_size = pack_size;
781 lst = &remote->packs;
782 while (*lst != target)
783 lst = &((*lst)->next);
784 *lst = (*lst)->next;
785
786 if (!verify_pack(target, 0))
787 install_packed_git(target);
788 else
789 remote->can_update_info_refs = 0;
790 }
791 }
792 release_request(request);
793 }
794 }
795
796 #ifdef USE_CURL_MULTI
797 static int fill_active_slot(void *unused)
798 {
799 struct transfer_request *request = request_queue_head;
800
801 if (aborted)
802 return 0;
803
804 for (request = request_queue_head; request; request = request->next) {
805 if (request->state == NEED_FETCH) {
806 start_fetch_loose(request);
807 return 1;
808 } else if (pushing && request->state == NEED_PUSH) {
809 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
810 start_put(request);
811 } else {
812 start_mkcol(request);
813 }
814 return 1;
815 }
816 }
817 return 0;
818 }
819 #endif
820
821 static void get_remote_object_list(unsigned char parent);
822
823 static void add_fetch_request(struct object *obj)
824 {
825 struct transfer_request *request;
826
827 check_locks();
828
829 /*
830 * Don't fetch the object if it's known to exist locally
831 * or is already in the request queue
832 */
833 if (remote_dir_exists[obj->sha1[0]] == -1)
834 get_remote_object_list(obj->sha1[0]);
835 if (obj->flags & (LOCAL | FETCHING))
836 return;
837
838 obj->flags |= FETCHING;
839 request = xmalloc(sizeof(*request));
840 request->obj = obj;
841 request->url = NULL;
842 request->lock = NULL;
843 request->headers = NULL;
844 request->local_fileno = -1;
845 request->local_stream = NULL;
846 request->state = NEED_FETCH;
847 request->next = request_queue_head;
848 request_queue_head = request;
849
850 #ifdef USE_CURL_MULTI
851 fill_active_slots();
852 step_active_slots();
853 #endif
854 }
855
856 static int add_send_request(struct object *obj, struct remote_lock *lock)
857 {
858 struct transfer_request *request = request_queue_head;
859 struct packed_git *target;
860
861 /* Keep locks active */
862 check_locks();
863
864 /*
865 * Don't push the object if it's known to exist on the remote
866 * or is already in the request queue
867 */
868 if (remote_dir_exists[obj->sha1[0]] == -1)
869 get_remote_object_list(obj->sha1[0]);
870 if (obj->flags & (REMOTE | PUSHING))
871 return 0;
872 target = find_sha1_pack(obj->sha1, remote->packs);
873 if (target) {
874 obj->flags |= REMOTE;
875 return 0;
876 }
877
878 obj->flags |= PUSHING;
879 request = xmalloc(sizeof(*request));
880 request->obj = obj;
881 request->url = NULL;
882 request->lock = lock;
883 request->headers = NULL;
884 request->local_fileno = -1;
885 request->local_stream = NULL;
886 request->state = NEED_PUSH;
887 request->next = request_queue_head;
888 request_queue_head = request;
889
890 #ifdef USE_CURL_MULTI
891 fill_active_slots();
892 step_active_slots();
893 #endif
894
895 return 1;
896 }
897
898 static int fetch_index(unsigned char *sha1)
899 {
900 char *hex = sha1_to_hex(sha1);
901 char *filename;
902 char *url;
903 char tmpfile[PATH_MAX];
904 long prev_posn = 0;
905 char range[RANGE_HEADER_SIZE];
906 struct curl_slist *range_header = NULL;
907
908 FILE *indexfile;
909 struct active_request_slot *slot;
910 struct slot_results results;
911
912 /* Don't use the index if the pack isn't there */
913 url = xmalloc(strlen(remote->url) + 64);
914 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
915 slot = get_active_slot();
916 slot->results = &results;
917 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
918 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
919 if (start_active_slot(slot)) {
920 run_active_slot(slot);
921 if (results.curl_result != CURLE_OK) {
922 free(url);
923 return error("Unable to verify pack %s is available",
924 hex);
925 }
926 } else {
927 free(url);
928 return error("Unable to start request");
929 }
930
931 if (has_pack_index(sha1)) {
932 free(url);
933 return 0;
934 }
935
936 if (push_verbosely)
937 fprintf(stderr, "Getting index for pack %s\n", hex);
938
939 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
940
941 filename = sha1_pack_index_name(sha1);
942 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
943 indexfile = fopen(tmpfile, "a");
944 if (!indexfile) {
945 free(url);
946 return error("Unable to open local file %s for pack index",
947 tmpfile);
948 }
949
950 slot = get_active_slot();
951 slot->results = &results;
952 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
953 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
954 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
955 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
956 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
957 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
958 slot->local = indexfile;
959
960 /* If there is data present from a previous transfer attempt,
961 resume where it left off */
962 prev_posn = ftell(indexfile);
963 if (prev_posn>0) {
964 if (push_verbosely)
965 fprintf(stderr,
966 "Resuming fetch of index for pack %s at byte %ld\n",
967 hex, prev_posn);
968 sprintf(range, "Range: bytes=%ld-", prev_posn);
969 range_header = curl_slist_append(range_header, range);
970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
971 }
972
973 if (start_active_slot(slot)) {
974 run_active_slot(slot);
975 if (results.curl_result != CURLE_OK) {
976 free(url);
977 fclose(indexfile);
978 return error("Unable to get pack index %s\n%s", url,
979 curl_errorstr);
980 }
981 } else {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to start request");
985 }
986
987 free(url);
988 fclose(indexfile);
989
990 return move_temp_to_file(tmpfile, filename);
991 }
992
993 static int setup_index(unsigned char *sha1)
994 {
995 struct packed_git *new_pack;
996
997 if (fetch_index(sha1))
998 return -1;
999
1000 new_pack = parse_pack_index(sha1);
1001 new_pack->next = remote->packs;
1002 remote->packs = new_pack;
1003 return 0;
1004 }
1005
1006 static int fetch_indices(void)
1007 {
1008 unsigned char sha1[20];
1009 char *url;
1010 struct strbuf buffer = STRBUF_INIT;
1011 char *data;
1012 int i = 0;
1013
1014 struct active_request_slot *slot;
1015 struct slot_results results;
1016
1017 if (push_verbosely)
1018 fprintf(stderr, "Getting pack list\n");
1019
1020 url = xmalloc(strlen(remote->url) + 20);
1021 sprintf(url, "%sobjects/info/packs", remote->url);
1022
1023 slot = get_active_slot();
1024 slot->results = &results;
1025 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1028 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1029 if (start_active_slot(slot)) {
1030 run_active_slot(slot);
1031 if (results.curl_result != CURLE_OK) {
1032 strbuf_release(&buffer);
1033 free(url);
1034 if (results.http_code == 404)
1035 return 0;
1036 else
1037 return error("%s", curl_errorstr);
1038 }
1039 } else {
1040 strbuf_release(&buffer);
1041 free(url);
1042 return error("Unable to start request");
1043 }
1044 free(url);
1045
1046 data = buffer.buf;
1047 while (i < buffer.len) {
1048 switch (data[i]) {
1049 case 'P':
1050 i++;
1051 if (i + 52 < buffer.len &&
1052 !prefixcmp(data + i, " pack-") &&
1053 !prefixcmp(data + i + 46, ".pack\n")) {
1054 get_sha1_hex(data + i + 6, sha1);
1055 setup_index(sha1);
1056 i += 51;
1057 break;
1058 }
1059 default:
1060 while (data[i] != '\n')
1061 i++;
1062 }
1063 i++;
1064 }
1065
1066 strbuf_release(&buffer);
1067 return 0;
1068 }
1069
1070 static void one_remote_object(const char *hex)
1071 {
1072 unsigned char sha1[20];
1073 struct object *obj;
1074
1075 if (get_sha1_hex(hex, sha1) != 0)
1076 return;
1077
1078 obj = lookup_object(sha1);
1079 if (!obj)
1080 obj = parse_object(sha1);
1081
1082 /* Ignore remote objects that don't exist locally */
1083 if (!obj)
1084 return;
1085
1086 obj->flags |= REMOTE;
1087 if (!object_list_contains(objects, obj))
1088 object_list_insert(obj, &objects);
1089 }
1090
1091 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1092 {
1093 int *lock_flags = (int *)ctx->userData;
1094
1095 if (tag_closed) {
1096 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1097 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1098 (*lock_flags & DAV_PROP_LOCKWR)) {
1099 *lock_flags |= DAV_LOCK_OK;
1100 }
1101 *lock_flags &= DAV_LOCK_OK;
1102 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1103 *lock_flags |= DAV_PROP_LOCKWR;
1104 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1105 *lock_flags |= DAV_PROP_LOCKEX;
1106 }
1107 }
1108 }
1109
1110 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1111 {
1112 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1113
1114 if (tag_closed && ctx->cdata) {
1115 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1116 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1117 strcpy(lock->owner, ctx->cdata);
1118 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1119 if (!prefixcmp(ctx->cdata, "Second-"))
1120 lock->timeout =
1121 strtol(ctx->cdata + 7, NULL, 10);
1122 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1123 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1124 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1125 strcpy(lock->token, ctx->cdata + 16);
1126 }
1127 }
1128 }
1129 }
1130
1131 static void one_remote_ref(char *refname);
1132
1133 static void
1134 xml_start_tag(void *userData, const char *name, const char **atts)
1135 {
1136 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1137 const char *c = strchr(name, ':');
1138 int new_len;
1139
1140 if (c == NULL)
1141 c = name;
1142 else
1143 c++;
1144
1145 new_len = strlen(ctx->name) + strlen(c) + 2;
1146
1147 if (new_len > ctx->len) {
1148 ctx->name = xrealloc(ctx->name, new_len);
1149 ctx->len = new_len;
1150 }
1151 strcat(ctx->name, ".");
1152 strcat(ctx->name, c);
1153
1154 free(ctx->cdata);
1155 ctx->cdata = NULL;
1156
1157 ctx->userFunc(ctx, 0);
1158 }
1159
1160 static void
1161 xml_end_tag(void *userData, const char *name)
1162 {
1163 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1164 const char *c = strchr(name, ':');
1165 char *ep;
1166
1167 ctx->userFunc(ctx, 1);
1168
1169 if (c == NULL)
1170 c = name;
1171 else
1172 c++;
1173
1174 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1175 *ep = 0;
1176 }
1177
1178 static void
1179 xml_cdata(void *userData, const XML_Char *s, int len)
1180 {
1181 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1182 free(ctx->cdata);
1183 ctx->cdata = xmemdupz(s, len);
1184 }
1185
1186 static struct remote_lock *lock_remote(const char *path, long timeout)
1187 {
1188 struct active_request_slot *slot;
1189 struct slot_results results;
1190 struct buffer out_buffer = { STRBUF_INIT, 0 };
1191 struct strbuf in_buffer = STRBUF_INIT;
1192 char *url;
1193 char *ep;
1194 char timeout_header[25];
1195 struct remote_lock *lock = NULL;
1196 struct curl_slist *dav_headers = NULL;
1197 struct xml_ctx ctx;
1198
1199 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1200 sprintf(url, "%s%s", remote->url, path);
1201
1202 /* Make sure leading directories exist for the remote ref */
1203 ep = strchr(url + strlen(remote->url) + 1, '/');
1204 while (ep) {
1205 *ep = 0;
1206 slot = get_active_slot();
1207 slot->results = &results;
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1209 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1210 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1211 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1212 if (start_active_slot(slot)) {
1213 run_active_slot(slot);
1214 if (results.curl_result != CURLE_OK &&
1215 results.http_code != 405) {
1216 fprintf(stderr,
1217 "Unable to create branch path %s\n",
1218 url);
1219 free(url);
1220 return NULL;
1221 }
1222 } else {
1223 fprintf(stderr, "Unable to start MKCOL request\n");
1224 free(url);
1225 return NULL;
1226 }
1227 *ep = '/';
1228 ep = strchr(ep + 1, '/');
1229 }
1230
1231 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232
1233 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1234 dav_headers = curl_slist_append(dav_headers, timeout_header);
1235 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1240 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1241 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1244 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1245 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1246 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1247 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248
1249 lock = xcalloc(1, sizeof(*lock));
1250 lock->timeout = -1;
1251
1252 if (start_active_slot(slot)) {
1253 run_active_slot(slot);
1254 if (results.curl_result == CURLE_OK) {
1255 XML_Parser parser = XML_ParserCreate(NULL);
1256 enum XML_Status result;
1257 ctx.name = xcalloc(10, 1);
1258 ctx.len = 0;
1259 ctx.cdata = NULL;
1260 ctx.userFunc = handle_new_lock_ctx;
1261 ctx.userData = lock;
1262 XML_SetUserData(parser, &ctx);
1263 XML_SetElementHandler(parser, xml_start_tag,
1264 xml_end_tag);
1265 XML_SetCharacterDataHandler(parser, xml_cdata);
1266 result = XML_Parse(parser, in_buffer.buf,
1267 in_buffer.len, 1);
1268 free(ctx.name);
1269 if (result != XML_STATUS_OK) {
1270 fprintf(stderr, "XML error: %s\n",
1271 XML_ErrorString(
1272 XML_GetErrorCode(parser)));
1273 lock->timeout = -1;
1274 }
1275 XML_ParserFree(parser);
1276 }
1277 } else {
1278 fprintf(stderr, "Unable to start LOCK request\n");
1279 }
1280
1281 curl_slist_free_all(dav_headers);
1282 strbuf_release(&out_buffer.buf);
1283 strbuf_release(&in_buffer);
1284
1285 if (lock->token == NULL || lock->timeout <= 0) {
1286 free(lock->token);
1287 free(lock->owner);
1288 free(url);
1289 free(lock);
1290 lock = NULL;
1291 } else {
1292 lock->url = url;
1293 lock->start_time = time(NULL);
1294 lock->next = remote->locks;
1295 remote->locks = lock;
1296 }
1297
1298 return lock;
1299 }
1300
1301 static int unlock_remote(struct remote_lock *lock)
1302 {
1303 struct active_request_slot *slot;
1304 struct slot_results results;
1305 struct remote_lock *prev = remote->locks;
1306 char *lock_token_header;
1307 struct curl_slist *dav_headers = NULL;
1308 int rc = 0;
1309
1310 lock_token_header = xmalloc(strlen(lock->token) + 31);
1311 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1312 lock->token);
1313 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1314
1315 slot = get_active_slot();
1316 slot->results = &results;
1317 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1318 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1319 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1320 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1321
1322 if (start_active_slot(slot)) {
1323 run_active_slot(slot);
1324 if (results.curl_result == CURLE_OK)
1325 rc = 1;
1326 else
1327 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1328 results.http_code);
1329 } else {
1330 fprintf(stderr, "Unable to start UNLOCK request\n");
1331 }
1332
1333 curl_slist_free_all(dav_headers);
1334 free(lock_token_header);
1335
1336 if (remote->locks == lock) {
1337 remote->locks = lock->next;
1338 } else {
1339 while (prev && prev->next != lock)
1340 prev = prev->next;
1341 if (prev)
1342 prev->next = prev->next->next;
1343 }
1344
1345 free(lock->owner);
1346 free(lock->url);
1347 free(lock->token);
1348 free(lock);
1349
1350 return rc;
1351 }
1352
1353 static void remove_locks(void)
1354 {
1355 struct remote_lock *lock = remote->locks;
1356
1357 fprintf(stderr, "Removing remote locks...\n");
1358 while (lock) {
1359 unlock_remote(lock);
1360 lock = lock->next;
1361 }
1362 }
1363
1364 static void remove_locks_on_signal(int signo)
1365 {
1366 remove_locks();
1367 signal(signo, SIG_DFL);
1368 raise(signo);
1369 }
1370
1371 static void remote_ls(const char *path, int flags,
1372 void (*userFunc)(struct remote_ls_ctx *ls),
1373 void *userData);
1374
1375 static void process_ls_object(struct remote_ls_ctx *ls)
1376 {
1377 unsigned int *parent = (unsigned int *)ls->userData;
1378 char *path = ls->dentry_name;
1379 char *obj_hex;
1380
1381 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1382 remote_dir_exists[*parent] = 1;
1383 return;
1384 }
1385
1386 if (strlen(path) != 49)
1387 return;
1388 path += 8;
1389 obj_hex = xmalloc(strlen(path));
1390 /* NB: path is not null-terminated, can not use strlcpy here */
1391 memcpy(obj_hex, path, 2);
1392 strcpy(obj_hex + 2, path + 3);
1393 one_remote_object(obj_hex);
1394 free(obj_hex);
1395 }
1396
1397 static void process_ls_ref(struct remote_ls_ctx *ls)
1398 {
1399 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1400 fprintf(stderr, " %s\n", ls->dentry_name);
1401 return;
1402 }
1403
1404 if (!(ls->dentry_flags & IS_DIR))
1405 one_remote_ref(ls->dentry_name);
1406 }
1407
1408 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1409 {
1410 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1411
1412 if (tag_closed) {
1413 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1414 if (ls->dentry_flags & IS_DIR) {
1415 if (ls->flags & PROCESS_DIRS) {
1416 ls->userFunc(ls);
1417 }
1418 if (strcmp(ls->dentry_name, ls->path) &&
1419 ls->flags & RECURSIVE) {
1420 remote_ls(ls->dentry_name,
1421 ls->flags,
1422 ls->userFunc,
1423 ls->userData);
1424 }
1425 } else if (ls->flags & PROCESS_FILES) {
1426 ls->userFunc(ls);
1427 }
1428 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1429 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1430 remote->path_len + 1);
1431 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1432 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1433 ls->dentry_flags |= IS_DIR;
1434 }
1435 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1436 free(ls->dentry_name);
1437 ls->dentry_name = NULL;
1438 ls->dentry_flags = 0;
1439 }
1440 }
1441
1442 static void remote_ls(const char *path, int flags,
1443 void (*userFunc)(struct remote_ls_ctx *ls),
1444 void *userData)
1445 {
1446 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1447 struct active_request_slot *slot;
1448 struct slot_results results;
1449 struct strbuf in_buffer = STRBUF_INIT;
1450 struct buffer out_buffer = { STRBUF_INIT, 0 };
1451 struct curl_slist *dav_headers = NULL;
1452 struct xml_ctx ctx;
1453 struct remote_ls_ctx ls;
1454
1455 ls.flags = flags;
1456 ls.path = xstrdup(path);
1457 ls.dentry_name = NULL;
1458 ls.dentry_flags = 0;
1459 ls.userData = userData;
1460 ls.userFunc = userFunc;
1461
1462 sprintf(url, "%s%s", remote->url, path);
1463
1464 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1465
1466 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1467 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1468
1469 slot = get_active_slot();
1470 slot->results = &results;
1471 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1472 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1473 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1474 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1475 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1476 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1477 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1478 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1479 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1480
1481 if (start_active_slot(slot)) {
1482 run_active_slot(slot);
1483 if (results.curl_result == CURLE_OK) {
1484 XML_Parser parser = XML_ParserCreate(NULL);
1485 enum XML_Status result;
1486 ctx.name = xcalloc(10, 1);
1487 ctx.len = 0;
1488 ctx.cdata = NULL;
1489 ctx.userFunc = handle_remote_ls_ctx;
1490 ctx.userData = &ls;
1491 XML_SetUserData(parser, &ctx);
1492 XML_SetElementHandler(parser, xml_start_tag,
1493 xml_end_tag);
1494 XML_SetCharacterDataHandler(parser, xml_cdata);
1495 result = XML_Parse(parser, in_buffer.buf,
1496 in_buffer.len, 1);
1497 free(ctx.name);
1498
1499 if (result != XML_STATUS_OK) {
1500 fprintf(stderr, "XML error: %s\n",
1501 XML_ErrorString(
1502 XML_GetErrorCode(parser)));
1503 }
1504 XML_ParserFree(parser);
1505 }
1506 } else {
1507 fprintf(stderr, "Unable to start PROPFIND request\n");
1508 }
1509
1510 free(ls.path);
1511 free(url);
1512 strbuf_release(&out_buffer.buf);
1513 strbuf_release(&in_buffer);
1514 curl_slist_free_all(dav_headers);
1515 }
1516
1517 static void get_remote_object_list(unsigned char parent)
1518 {
1519 char path[] = "objects/XX/";
1520 static const char hex[] = "0123456789abcdef";
1521 unsigned int val = parent;
1522
1523 path[8] = hex[val >> 4];
1524 path[9] = hex[val & 0xf];
1525 remote_dir_exists[val] = 0;
1526 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1527 process_ls_object, &val);
1528 }
1529
1530 static int locking_available(void)
1531 {
1532 struct active_request_slot *slot;
1533 struct slot_results results;
1534 struct strbuf in_buffer = STRBUF_INIT;
1535 struct buffer out_buffer = { STRBUF_INIT, 0 };
1536 struct curl_slist *dav_headers = NULL;
1537 struct xml_ctx ctx;
1538 int lock_flags = 0;
1539
1540 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1541
1542 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1543 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1544
1545 slot = get_active_slot();
1546 slot->results = &results;
1547 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1548 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1549 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1550 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1551 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1552 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1553 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1554 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1555 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1556
1557 if (start_active_slot(slot)) {
1558 run_active_slot(slot);
1559 if (results.curl_result == CURLE_OK) {
1560 XML_Parser parser = XML_ParserCreate(NULL);
1561 enum XML_Status result;
1562 ctx.name = xcalloc(10, 1);
1563 ctx.len = 0;
1564 ctx.cdata = NULL;
1565 ctx.userFunc = handle_lockprop_ctx;
1566 ctx.userData = &lock_flags;
1567 XML_SetUserData(parser, &ctx);
1568 XML_SetElementHandler(parser, xml_start_tag,
1569 xml_end_tag);
1570 result = XML_Parse(parser, in_buffer.buf,
1571 in_buffer.len, 1);
1572 free(ctx.name);
1573
1574 if (result != XML_STATUS_OK) {
1575 fprintf(stderr, "XML error: %s\n",
1576 XML_ErrorString(
1577 XML_GetErrorCode(parser)));
1578 lock_flags = 0;
1579 }
1580 XML_ParserFree(parser);
1581 if (!lock_flags)
1582 error("Error: no DAV locking support on %s",
1583 remote->url);
1584
1585 } else {
1586 error("Cannot access URL %s, return code %d",
1587 remote->url, results.curl_result);
1588 lock_flags = 0;
1589 }
1590 } else {
1591 error("Unable to start PROPFIND request on %s", remote->url);
1592 }
1593
1594 strbuf_release(&out_buffer.buf);
1595 strbuf_release(&in_buffer);
1596 curl_slist_free_all(dav_headers);
1597
1598 return lock_flags;
1599 }
1600
1601 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1602 {
1603 struct object_list *entry = xmalloc(sizeof(struct object_list));
1604 entry->item = obj;
1605 entry->next = *p;
1606 *p = entry;
1607 return &entry->next;
1608 }
1609
1610 static struct object_list **process_blob(struct blob *blob,
1611 struct object_list **p,
1612 struct name_path *path,
1613 const char *name)
1614 {
1615 struct object *obj = &blob->object;
1616
1617 obj->flags |= LOCAL;
1618
1619 if (obj->flags & (UNINTERESTING | SEEN))
1620 return p;
1621
1622 obj->flags |= SEEN;
1623 return add_one_object(obj, p);
1624 }
1625
1626 static struct object_list **process_tree(struct tree *tree,
1627 struct object_list **p,
1628 struct name_path *path,
1629 const char *name)
1630 {
1631 struct object *obj = &tree->object;
1632 struct tree_desc desc;
1633 struct name_entry entry;
1634 struct name_path me;
1635
1636 obj->flags |= LOCAL;
1637
1638 if (obj->flags & (UNINTERESTING | SEEN))
1639 return p;
1640 if (parse_tree(tree) < 0)
1641 die("bad tree object %s", sha1_to_hex(obj->sha1));
1642
1643 obj->flags |= SEEN;
1644 name = xstrdup(name);
1645 p = add_one_object(obj, p);
1646 me.up = path;
1647 me.elem = name;
1648 me.elem_len = strlen(name);
1649
1650 init_tree_desc(&desc, tree->buffer, tree->size);
1651
1652 while (tree_entry(&desc, &entry))
1653 switch (object_type(entry.mode)) {
1654 case OBJ_TREE:
1655 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1656 break;
1657 case OBJ_BLOB:
1658 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1659 break;
1660 default:
1661 /* Subproject commit - not in this repository */
1662 break;
1663 }
1664
1665 free(tree->buffer);
1666 tree->buffer = NULL;
1667 return p;
1668 }
1669
1670 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1671 {
1672 int i;
1673 struct commit *commit;
1674 struct object_list **p = &objects;
1675 int count = 0;
1676
1677 while ((commit = get_revision(revs)) != NULL) {
1678 p = process_tree(commit->tree, p, NULL, "");
1679 commit->object.flags |= LOCAL;
1680 if (!(commit->object.flags & UNINTERESTING))
1681 count += add_send_request(&commit->object, lock);
1682 }
1683
1684 for (i = 0; i < revs->pending.nr; i++) {
1685 struct object_array_entry *entry = revs->pending.objects + i;
1686 struct object *obj = entry->item;
1687 const char *name = entry->name;
1688
1689 if (obj->flags & (UNINTERESTING | SEEN))
1690 continue;
1691 if (obj->type == OBJ_TAG) {
1692 obj->flags |= SEEN;
1693 p = add_one_object(obj, p);
1694 continue;
1695 }
1696 if (obj->type == OBJ_TREE) {
1697 p = process_tree((struct tree *)obj, p, NULL, name);
1698 continue;
1699 }
1700 if (obj->type == OBJ_BLOB) {
1701 p = process_blob((struct blob *)obj, p, NULL, name);
1702 continue;
1703 }
1704 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1705 }
1706
1707 while (objects) {
1708 if (!(objects->item->flags & UNINTERESTING))
1709 count += add_send_request(objects->item, lock);
1710 objects = objects->next;
1711 }
1712
1713 return count;
1714 }
1715
1716 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1717 {
1718 struct active_request_slot *slot;
1719 struct slot_results results;
1720 char *if_header;
1721 struct buffer out_buffer = { STRBUF_INIT, 0 };
1722 struct curl_slist *dav_headers = NULL;
1723
1724 if_header = xmalloc(strlen(lock->token) + 25);
1725 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1726 dav_headers = curl_slist_append(dav_headers, if_header);
1727
1728 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1729
1730 slot = get_active_slot();
1731 slot->results = &results;
1732 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1733 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1734 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1735 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1736 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1737 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1738 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1739 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1740 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1741
1742 if (start_active_slot(slot)) {
1743 run_active_slot(slot);
1744 strbuf_release(&out_buffer.buf);
1745 free(if_header);
1746 if (results.curl_result != CURLE_OK) {
1747 fprintf(stderr,
1748 "PUT error: curl result=%d, HTTP code=%ld\n",
1749 results.curl_result, results.http_code);
1750 /* We should attempt recovery? */
1751 return 0;
1752 }
1753 } else {
1754 strbuf_release(&out_buffer.buf);
1755 free(if_header);
1756 fprintf(stderr, "Unable to start PUT request\n");
1757 return 0;
1758 }
1759
1760 return 1;
1761 }
1762
1763 static struct ref *local_refs, **local_tail;
1764 static struct ref *remote_refs, **remote_tail;
1765
1766 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1767 {
1768 struct ref *ref;
1769 int len = strlen(refname) + 1;
1770 ref = xcalloc(1, sizeof(*ref) + len);
1771 hashcpy(ref->new_sha1, sha1);
1772 memcpy(ref->name, refname, len);
1773 *local_tail = ref;
1774 local_tail = &ref->next;
1775 return 0;
1776 }
1777
1778 static void one_remote_ref(char *refname)
1779 {
1780 struct ref *ref;
1781 struct object *obj;
1782
1783 ref = alloc_ref_from_str(refname);
1784
1785 if (http_fetch_ref(remote->url, ref) != 0) {
1786 fprintf(stderr,
1787 "Unable to fetch ref %s from %s\n",
1788 refname, remote->url);
1789 free(ref);
1790 return;
1791 }
1792
1793 /*
1794 * Fetch a copy of the object if it doesn't exist locally - it
1795 * may be required for updating server info later.
1796 */
1797 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1798 obj = lookup_unknown_object(ref->old_sha1);
1799 if (obj) {
1800 fprintf(stderr, " fetch %s for %s\n",
1801 sha1_to_hex(ref->old_sha1), refname);
1802 add_fetch_request(obj);
1803 }
1804 }
1805
1806 *remote_tail = ref;
1807 remote_tail = &ref->next;
1808 }
1809
1810 static void get_local_heads(void)
1811 {
1812 local_tail = &local_refs;
1813 for_each_ref(one_local_ref, NULL);
1814 }
1815
1816 static void get_dav_remote_heads(void)
1817 {
1818 remote_tail = &remote_refs;
1819 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1820 }
1821
1822 static int is_zero_sha1(const unsigned char *sha1)
1823 {
1824 int i;
1825
1826 for (i = 0; i < 20; i++) {
1827 if (*sha1++)
1828 return 0;
1829 }
1830 return 1;
1831 }
1832
1833 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1834 {
1835 while (list) {
1836 struct commit_list *temp = list;
1837 temp->item->object.flags &= ~mark;
1838 list = temp->next;
1839 free(temp);
1840 }
1841 }
1842
1843 static int ref_newer(const unsigned char *new_sha1,
1844 const unsigned char *old_sha1)
1845 {
1846 struct object *o;
1847 struct commit *old, *new;
1848 struct commit_list *list, *used;
1849 int found = 0;
1850
1851 /* Both new and old must be commit-ish and new is descendant of
1852 * old. Otherwise we require --force.
1853 */
1854 o = deref_tag(parse_object(old_sha1), NULL, 0);
1855 if (!o || o->type != OBJ_COMMIT)
1856 return 0;
1857 old = (struct commit *) o;
1858
1859 o = deref_tag(parse_object(new_sha1), NULL, 0);
1860 if (!o || o->type != OBJ_COMMIT)
1861 return 0;
1862 new = (struct commit *) o;
1863
1864 if (parse_commit(new) < 0)
1865 return 0;
1866
1867 used = list = NULL;
1868 commit_list_insert(new, &list);
1869 while (list) {
1870 new = pop_most_recent_commit(&list, TMP_MARK);
1871 commit_list_insert(new, &used);
1872 if (new == old) {
1873 found = 1;
1874 break;
1875 }
1876 }
1877 unmark_and_free(list, TMP_MARK);
1878 unmark_and_free(used, TMP_MARK);
1879 return found;
1880 }
1881
1882 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1883 {
1884 struct strbuf *buf = (struct strbuf *)ls->userData;
1885 struct object *o;
1886 int len;
1887 char *ref_info;
1888 struct ref *ref;
1889
1890 ref = alloc_ref_from_str(ls->dentry_name);
1891
1892 if (http_fetch_ref(remote->url, ref) != 0) {
1893 fprintf(stderr,
1894 "Unable to fetch ref %s from %s\n",
1895 ls->dentry_name, remote->url);
1896 aborted = 1;
1897 free(ref);
1898 return;
1899 }
1900
1901 o = parse_object(ref->old_sha1);
1902 if (!o) {
1903 fprintf(stderr,
1904 "Unable to parse object %s for remote ref %s\n",
1905 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1906 aborted = 1;
1907 free(ref);
1908 return;
1909 }
1910
1911 len = strlen(ls->dentry_name) + 42;
1912 ref_info = xcalloc(len + 1, 1);
1913 sprintf(ref_info, "%s %s\n",
1914 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1915 fwrite_buffer(ref_info, 1, len, buf);
1916 free(ref_info);
1917
1918 if (o->type == OBJ_TAG) {
1919 o = deref_tag(o, ls->dentry_name, 0);
1920 if (o) {
1921 len = strlen(ls->dentry_name) + 45;
1922 ref_info = xcalloc(len + 1, 1);
1923 sprintf(ref_info, "%s %s^{}\n",
1924 sha1_to_hex(o->sha1), ls->dentry_name);
1925 fwrite_buffer(ref_info, 1, len, buf);
1926 free(ref_info);
1927 }
1928 }
1929 free(ref);
1930 }
1931
1932 static void update_remote_info_refs(struct remote_lock *lock)
1933 {
1934 struct buffer buffer = { STRBUF_INIT, 0 };
1935 struct active_request_slot *slot;
1936 struct slot_results results;
1937 char *if_header;
1938 struct curl_slist *dav_headers = NULL;
1939
1940 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1941 add_remote_info_ref, &buffer.buf);
1942 if (!aborted) {
1943 if_header = xmalloc(strlen(lock->token) + 25);
1944 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1945 dav_headers = curl_slist_append(dav_headers, if_header);
1946
1947 slot = get_active_slot();
1948 slot->results = &results;
1949 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1950 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1951 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1952 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1953 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1954 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1955 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1956 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1957 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1958
1959 if (start_active_slot(slot)) {
1960 run_active_slot(slot);
1961 if (results.curl_result != CURLE_OK) {
1962 fprintf(stderr,
1963 "PUT error: curl result=%d, HTTP code=%ld\n",
1964 results.curl_result, results.http_code);
1965 }
1966 }
1967 free(if_header);
1968 }
1969 strbuf_release(&buffer.buf);
1970 }
1971
1972 static int remote_exists(const char *path)
1973 {
1974 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1975 struct active_request_slot *slot;
1976 struct slot_results results;
1977 int ret = -1;
1978
1979 sprintf(url, "%s%s", remote->url, path);
1980
1981 slot = get_active_slot();
1982 slot->results = &results;
1983 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1984 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1985
1986 if (start_active_slot(slot)) {
1987 run_active_slot(slot);
1988 if (results.http_code == 404)
1989 ret = 0;
1990 else if (results.curl_result == CURLE_OK)
1991 ret = 1;
1992 else
1993 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1994 } else {
1995 fprintf(stderr, "Unable to start HEAD request\n");
1996 }
1997
1998 free(url);
1999 return ret;
2000 }
2001
2002 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2003 {
2004 char *url;
2005 struct strbuf buffer = STRBUF_INIT;
2006 struct active_request_slot *slot;
2007 struct slot_results results;
2008
2009 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2010 sprintf(url, "%s%s", remote->url, path);
2011
2012 slot = get_active_slot();
2013 slot->results = &results;
2014 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2015 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2016 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2017 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2018 if (start_active_slot(slot)) {
2019 run_active_slot(slot);
2020 if (results.curl_result != CURLE_OK) {
2021 die("Couldn't get %s for remote symref\n%s",
2022 url, curl_errorstr);
2023 }
2024 } else {
2025 die("Unable to start remote symref request");
2026 }
2027 free(url);
2028
2029 free(*symref);
2030 *symref = NULL;
2031 hashclr(sha1);
2032
2033 if (buffer.len == 0)
2034 return;
2035
2036 /* If it's a symref, set the refname; otherwise try for a sha1 */
2037 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2038 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2039 } else {
2040 get_sha1_hex(buffer.buf, sha1);
2041 }
2042
2043 strbuf_release(&buffer);
2044 }
2045
2046 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2047 {
2048 struct commit *head = lookup_commit(head_sha1);
2049 struct commit *branch = lookup_commit(branch_sha1);
2050 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2051
2052 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2053 }
2054
2055 static int delete_remote_branch(char *pattern, int force)
2056 {
2057 struct ref *refs = remote_refs;
2058 struct ref *remote_ref = NULL;
2059 unsigned char head_sha1[20];
2060 char *symref = NULL;
2061 int match;
2062 int patlen = strlen(pattern);
2063 int i;
2064 struct active_request_slot *slot;
2065 struct slot_results results;
2066 char *url;
2067
2068 /* Find the remote branch(es) matching the specified branch name */
2069 for (match = 0; refs; refs = refs->next) {
2070 char *name = refs->name;
2071 int namelen = strlen(name);
2072 if (namelen < patlen ||
2073 memcmp(name + namelen - patlen, pattern, patlen))
2074 continue;
2075 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2076 continue;
2077 match++;
2078 remote_ref = refs;
2079 }
2080 if (match == 0)
2081 return error("No remote branch matches %s", pattern);
2082 if (match != 1)
2083 return error("More than one remote branch matches %s",
2084 pattern);
2085
2086 /*
2087 * Remote HEAD must be a symref (not exactly foolproof; a remote
2088 * symlink to a symref will look like a symref)
2089 */
2090 fetch_symref("HEAD", &symref, head_sha1);
2091 if (!symref)
2092 return error("Remote HEAD is not a symref");
2093
2094 /* Remote branch must not be the remote HEAD */
2095 for (i=0; symref && i<MAXDEPTH; i++) {
2096 if (!strcmp(remote_ref->name, symref))
2097 return error("Remote branch %s is the current HEAD",
2098 remote_ref->name);
2099 fetch_symref(symref, &symref, head_sha1);
2100 }
2101
2102 /* Run extra sanity checks if delete is not forced */
2103 if (!force) {
2104 /* Remote HEAD must resolve to a known object */
2105 if (symref)
2106 return error("Remote HEAD symrefs too deep");
2107 if (is_zero_sha1(head_sha1))
2108 return error("Unable to resolve remote HEAD");
2109 if (!has_sha1_file(head_sha1))
2110 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2111
2112 /* Remote branch must resolve to a known object */
2113 if (is_zero_sha1(remote_ref->old_sha1))
2114 return error("Unable to resolve remote branch %s",
2115 remote_ref->name);
2116 if (!has_sha1_file(remote_ref->old_sha1))
2117 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));
2118
2119 /* Remote branch must be an ancestor of remote HEAD */
2120 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2121 return error("The branch '%s' is not an ancestor "
2122 "of your current HEAD.\n"
2123 "If you are sure you want to delete it,"
2124 " run:\n\t'git http-push -D %s %s'",
2125 remote_ref->name, remote->url, pattern);
2126 }
2127 }
2128
2129 /* Send delete request */
2130 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2131 if (dry_run)
2132 return 0;
2133 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2134 sprintf(url, "%s%s", remote->url, remote_ref->name);
2135 slot = get_active_slot();
2136 slot->results = &results;
2137 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2138 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2139 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2140 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2141 if (start_active_slot(slot)) {
2142 run_active_slot(slot);
2143 free(url);
2144 if (results.curl_result != CURLE_OK)
2145 return error("DELETE request failed (%d/%ld)\n",
2146 results.curl_result, results.http_code);
2147 } else {
2148 free(url);
2149 return error("Unable to start DELETE request");
2150 }
2151
2152 return 0;
2153 }
2154
2155 int main(int argc, char **argv)
2156 {
2157 struct transfer_request *request;
2158 struct transfer_request *next_request;
2159 int nr_refspec = 0;
2160 char **refspec = NULL;
2161 struct remote_lock *ref_lock = NULL;
2162 struct remote_lock *info_ref_lock = NULL;
2163 struct rev_info revs;
2164 int delete_branch = 0;
2165 int force_delete = 0;
2166 int objects_to_send;
2167 int rc = 0;
2168 int i;
2169 int new_refs;
2170 struct ref *ref;
2171 char *rewritten_url = NULL;
2172
2173 setup_git_directory();
2174
2175 remote = xcalloc(sizeof(*remote), 1);
2176
2177 argv++;
2178 for (i = 1; i < argc; i++, argv++) {
2179 char *arg = *argv;
2180
2181 if (*arg == '-') {
2182 if (!strcmp(arg, "--all")) {
2183 push_all = MATCH_REFS_ALL;
2184 continue;
2185 }
2186 if (!strcmp(arg, "--force")) {
2187 force_all = 1;
2188 continue;
2189 }
2190 if (!strcmp(arg, "--dry-run")) {
2191 dry_run = 1;
2192 continue;
2193 }
2194 if (!strcmp(arg, "--verbose")) {
2195 push_verbosely = 1;
2196 continue;
2197 }
2198 if (!strcmp(arg, "-d")) {
2199 delete_branch = 1;
2200 continue;
2201 }
2202 if (!strcmp(arg, "-D")) {
2203 delete_branch = 1;
2204 force_delete = 1;
2205 continue;
2206 }
2207 }
2208 if (!remote->url) {
2209 char *path = strstr(arg, "//");
2210 remote->url = arg;
2211 if (path) {
2212 path = strchr(path+2, '/');
2213 if (path)
2214 remote->path_len = strlen(path);
2215 }
2216 continue;
2217 }
2218 refspec = argv;
2219 nr_refspec = argc - i;
2220 break;
2221 }
2222
2223 #ifndef USE_CURL_MULTI
2224 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2225 #endif
2226
2227 if (!remote->url)
2228 usage(http_push_usage);
2229
2230 if (delete_branch && nr_refspec != 1)
2231 die("You must specify only one branch name when deleting a remote branch");
2232
2233 memset(remote_dir_exists, -1, 256);
2234
2235 http_init(NULL);
2236
2237 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2238
2239 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2240 rewritten_url = malloc(strlen(remote->url)+2);
2241 strcpy(rewritten_url, remote->url);
2242 strcat(rewritten_url, "/");
2243 remote->url = rewritten_url;
2244 ++remote->path_len;
2245 }
2246
2247 /* Verify DAV compliance/lock support */
2248 if (!locking_available()) {
2249 rc = 1;
2250 goto cleanup;
2251 }
2252
2253 signal(SIGINT, remove_locks_on_signal);
2254 signal(SIGHUP, remove_locks_on_signal);
2255 signal(SIGQUIT, remove_locks_on_signal);
2256 signal(SIGTERM, remove_locks_on_signal);
2257
2258 /* Check whether the remote has server info files */
2259 remote->can_update_info_refs = 0;
2260 remote->has_info_refs = remote_exists("info/refs");
2261 remote->has_info_packs = remote_exists("objects/info/packs");
2262 if (remote->has_info_refs) {
2263 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2264 if (info_ref_lock)
2265 remote->can_update_info_refs = 1;
2266 else {
2267 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2268 rc = 1;
2269 goto cleanup;
2270 }
2271 }
2272 if (remote->has_info_packs)
2273 fetch_indices();
2274
2275 /* Get a list of all local and remote heads to validate refspecs */
2276 get_local_heads();
2277 fprintf(stderr, "Fetching remote heads...\n");
2278 get_dav_remote_heads();
2279
2280 /* Remove a remote branch if -d or -D was specified */
2281 if (delete_branch) {
2282 if (delete_remote_branch(refspec[0], force_delete) == -1)
2283 fprintf(stderr, "Unable to delete remote branch %s\n",
2284 refspec[0]);
2285 goto cleanup;
2286 }
2287
2288 /* match them up */
2289 if (!remote_tail)
2290 remote_tail = &remote_refs;
2291 if (match_refs(local_refs, remote_refs, &remote_tail,
2292 nr_refspec, (const char **) refspec, push_all)) {
2293 rc = -1;
2294 goto cleanup;
2295 }
2296 if (!remote_refs) {
2297 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2298 rc = 0;
2299 goto cleanup;
2300 }
2301
2302 new_refs = 0;
2303 for (ref = remote_refs; ref; ref = ref->next) {
2304 char old_hex[60], *new_hex;
2305 const char *commit_argv[4];
2306 int commit_argc;
2307 char *new_sha1_hex, *old_sha1_hex;
2308
2309 if (!ref->peer_ref)
2310 continue;
2311
2312 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2313 if (delete_remote_branch(ref->name, 1) == -1) {
2314 error("Could not remove %s", ref->name);
2315 rc = -4;
2316 }
2317 new_refs++;
2318 continue;
2319 }
2320
2321 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2322 if (push_verbosely || 1)
2323 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2324 continue;
2325 }
2326
2327 if (!force_all &&
2328 !is_zero_sha1(ref->old_sha1) &&
2329 !ref->force) {
2330 if (!has_sha1_file(ref->old_sha1) ||
2331 !ref_newer(ref->peer_ref->new_sha1,
2332 ref->old_sha1)) {
2333 /*
2334 * We do not have the remote ref, or
2335 * we know that the remote ref is not
2336 * an ancestor of what we are trying to
2337 * push. Either way this can be losing
2338 * commits at the remote end and likely
2339 * we were not up to date to begin with.
2340 */
2341 error("remote '%s' is not an ancestor of\n"
2342 "local '%s'.\n"
2343 "Maybe you are not up-to-date and "
2344 "need to pull first?",
2345 ref->name,
2346 ref->peer_ref->name);
2347 rc = -2;
2348 continue;
2349 }
2350 }
2351 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2352 new_refs++;
2353 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2354 new_hex = sha1_to_hex(ref->new_sha1);
2355
2356 fprintf(stderr, "updating '%s'", ref->name);
2357 if (strcmp(ref->name, ref->peer_ref->name))
2358 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2359 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2360 if (dry_run)
2361 continue;
2362
2363 /* Lock remote branch ref */
2364 ref_lock = lock_remote(ref->name, LOCK_TIME);
2365 if (ref_lock == NULL) {
2366 fprintf(stderr, "Unable to lock remote branch %s\n",
2367 ref->name);
2368 rc = 1;
2369 continue;
2370 }
2371
2372 /* Set up revision info for this refspec */
2373 commit_argc = 3;
2374 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2375 old_sha1_hex = NULL;
2376 commit_argv[1] = "--objects";
2377 commit_argv[2] = new_sha1_hex;
2378 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2379 old_sha1_hex = xmalloc(42);
2380 sprintf(old_sha1_hex, "^%s",
2381 sha1_to_hex(ref->old_sha1));
2382 commit_argv[3] = old_sha1_hex;
2383 commit_argc++;
2384 }
2385 init_revisions(&revs, setup_git_directory());
2386 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2387 revs.edge_hint = 0; /* just in case */
2388 free(new_sha1_hex);
2389 if (old_sha1_hex) {
2390 free(old_sha1_hex);
2391 commit_argv[1] = NULL;
2392 }
2393
2394 /* Generate a list of objects that need to be pushed */
2395 pushing = 0;
2396 if (prepare_revision_walk(&revs))
2397 die("revision walk setup failed");
2398 mark_edges_uninteresting(revs.commits, &revs, NULL);
2399 objects_to_send = get_delta(&revs, ref_lock);
2400 finish_all_active_slots();
2401
2402 /* Push missing objects to remote, this would be a
2403 convenient time to pack them first if appropriate. */
2404 pushing = 1;
2405 if (objects_to_send)
2406 fprintf(stderr, " sending %d objects\n",
2407 objects_to_send);
2408 #ifdef USE_CURL_MULTI
2409 fill_active_slots();
2410 add_fill_function(NULL, fill_active_slot);
2411 #endif
2412 do {
2413 finish_all_active_slots();
2414 #ifdef USE_CURL_MULTI
2415 fill_active_slots();
2416 #endif
2417 } while (request_queue_head && !aborted);
2418
2419 /* Update the remote branch if all went well */
2420 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2421 rc = 1;
2422
2423 if (!rc)
2424 fprintf(stderr, " done\n");
2425 unlock_remote(ref_lock);
2426 check_locks();
2427 }
2428
2429 /* Update remote server info if appropriate */
2430 if (remote->has_info_refs && new_refs) {
2431 if (info_ref_lock && remote->can_update_info_refs) {
2432 fprintf(stderr, "Updating remote server info\n");
2433 if (!dry_run)
2434 update_remote_info_refs(info_ref_lock);
2435 } else {
2436 fprintf(stderr, "Unable to update server info\n");
2437 }
2438 }
2439
2440 cleanup:
2441 free(rewritten_url);
2442 if (info_ref_lock)
2443 unlock_remote(info_ref_lock);
2444 free(remote);
2445
2446 curl_slist_free_all(no_pragma_header);
2447
2448 http_cleanup();
2449
2450 request = request_queue_head;
2451 while (request != NULL) {
2452 next_request = request->next;
2453 release_request(request);
2454 request = next_request;
2455 }
2456
2457 return rc;
2458 }
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