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Fix some more memory leaks in http-push.c
[git.git] / http-push.c
blobfc60bfd5f476abc94c3f70b5ea95373bd444e16f
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 static struct curl_slist *default_headers;
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 request->buffer.buffer = xmalloc(size);
499
500 /* Compress it */
501 stream.next_out = request->buffer.buffer;
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.size = stream.total_out;
519 request->buffer.posn = 0;
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.size);
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 if (request->url != NULL)
669 free(request->url);
670 free(request);
671 }
672
673 static void finish_request(struct transfer_request *request)
674 {
675 struct stat st;
676 struct packed_git *target;
677 struct packed_git **lst;
678
679 request->curl_result = request->slot->curl_result;
680 request->http_code = request->slot->http_code;
681 request->slot = NULL;
682
683 /* Keep locks active */
684 check_locks();
685
686 if (request->headers != NULL)
687 curl_slist_free_all(request->headers);
688
689 /* URL is reused for MOVE after PUT */
690 if (request->state != RUN_PUT) {
691 free(request->url);
692 request->url = NULL;
693 }
694
695 if (request->state == RUN_MKCOL) {
696 if (request->curl_result == CURLE_OK ||
697 request->http_code == 405) {
698 remote_dir_exists[request->obj->sha1[0]] = 1;
699 start_put(request);
700 } else {
701 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
702 sha1_to_hex(request->obj->sha1),
703 request->curl_result, request->http_code);
704 request->state = ABORTED;
705 aborted = 1;
706 }
707 } else if (request->state == RUN_PUT) {
708 if (request->curl_result == CURLE_OK) {
709 start_move(request);
710 } else {
711 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
712 sha1_to_hex(request->obj->sha1),
713 request->curl_result, request->http_code);
714 request->state = ABORTED;
715 aborted = 1;
716 }
717 } else if (request->state == RUN_MOVE) {
718 if (request->curl_result == CURLE_OK) {
719 if (push_verbosely)
720 fprintf(stderr, " sent %s\n",
721 sha1_to_hex(request->obj->sha1));
722 request->obj->flags |= REMOTE;
723 release_request(request);
724 } else {
725 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
726 sha1_to_hex(request->obj->sha1),
727 request->curl_result, request->http_code);
728 request->state = ABORTED;
729 aborted = 1;
730 }
731 } else if (request->state == RUN_FETCH_LOOSE) {
732 fchmod(request->local_fileno, 0444);
733 close(request->local_fileno); request->local_fileno = -1;
734
735 if (request->curl_result != CURLE_OK &&
736 request->http_code != 416) {
737 if (stat(request->tmpfile, &st) == 0) {
738 if (st.st_size == 0)
739 unlink(request->tmpfile);
740 }
741 } else {
742 if (request->http_code == 416)
743 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
744
745 inflateEnd(&request->stream);
746 SHA1_Final(request->real_sha1, &request->c);
747 if (request->zret != Z_STREAM_END) {
748 unlink(request->tmpfile);
749 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
750 unlink(request->tmpfile);
751 } else {
752 request->rename =
753 move_temp_to_file(
754 request->tmpfile,
755 request->filename);
756 if (request->rename == 0) {
757 request->obj->flags |= (LOCAL | REMOTE);
758 }
759 }
760 }
761
762 /* Try fetching packed if necessary */
763 if (request->obj->flags & LOCAL)
764 release_request(request);
765 else
766 start_fetch_packed(request);
767
768 } else if (request->state == RUN_FETCH_PACKED) {
769 if (request->curl_result != CURLE_OK) {
770 fprintf(stderr, "Unable to get pack file %s\n%s",
771 request->url, curl_errorstr);
772 remote->can_update_info_refs = 0;
773 } else {
774 off_t pack_size = ftell(request->local_stream);
775
776 fclose(request->local_stream);
777 request->local_stream = NULL;
778 if (!move_temp_to_file(request->tmpfile,
779 request->filename)) {
780 target = (struct packed_git *)request->userData;
781 target->pack_size = pack_size;
782 lst = &remote->packs;
783 while (*lst != target)
784 lst = &((*lst)->next);
785 *lst = (*lst)->next;
786
787 if (!verify_pack(target, 0))
788 install_packed_git(target);
789 else
790 remote->can_update_info_refs = 0;
791 }
792 }
793 release_request(request);
794 }
795 }
796
797 #ifdef USE_CURL_MULTI
798 static int fill_active_slot(void *unused)
799 {
800 struct transfer_request *request = request_queue_head;
801
802 if (aborted)
803 return 0;
804
805 for (request = request_queue_head; request; request = request->next) {
806 if (request->state == NEED_FETCH) {
807 start_fetch_loose(request);
808 return 1;
809 } else if (pushing && request->state == NEED_PUSH) {
810 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
811 start_put(request);
812 } else {
813 start_mkcol(request);
814 }
815 return 1;
816 }
817 }
818 return 0;
819 }
820 #endif
821
822 static void get_remote_object_list(unsigned char parent);
823
824 static void add_fetch_request(struct object *obj)
825 {
826 struct transfer_request *request;
827
828 check_locks();
829
830 /*
831 * Don't fetch the object if it's known to exist locally
832 * or is already in the request queue
833 */
834 if (remote_dir_exists[obj->sha1[0]] == -1)
835 get_remote_object_list(obj->sha1[0]);
836 if (obj->flags & (LOCAL | FETCHING))
837 return;
838
839 obj->flags |= FETCHING;
840 request = xmalloc(sizeof(*request));
841 request->obj = obj;
842 request->url = NULL;
843 request->lock = NULL;
844 request->headers = NULL;
845 request->local_fileno = -1;
846 request->local_stream = NULL;
847 request->state = NEED_FETCH;
848 request->next = request_queue_head;
849 request_queue_head = request;
850
851 #ifdef USE_CURL_MULTI
852 fill_active_slots();
853 step_active_slots();
854 #endif
855 }
856
857 static int add_send_request(struct object *obj, struct remote_lock *lock)
858 {
859 struct transfer_request *request = request_queue_head;
860 struct packed_git *target;
861
862 /* Keep locks active */
863 check_locks();
864
865 /*
866 * Don't push the object if it's known to exist on the remote
867 * or is already in the request queue
868 */
869 if (remote_dir_exists[obj->sha1[0]] == -1)
870 get_remote_object_list(obj->sha1[0]);
871 if (obj->flags & (REMOTE | PUSHING))
872 return 0;
873 target = find_sha1_pack(obj->sha1, remote->packs);
874 if (target) {
875 obj->flags |= REMOTE;
876 return 0;
877 }
878
879 obj->flags |= PUSHING;
880 request = xmalloc(sizeof(*request));
881 request->obj = obj;
882 request->url = NULL;
883 request->lock = lock;
884 request->headers = NULL;
885 request->local_fileno = -1;
886 request->local_stream = NULL;
887 request->state = NEED_PUSH;
888 request->next = request_queue_head;
889 request_queue_head = request;
890
891 #ifdef USE_CURL_MULTI
892 fill_active_slots();
893 step_active_slots();
894 #endif
895
896 return 1;
897 }
898
899 static int fetch_index(unsigned char *sha1)
900 {
901 char *hex = sha1_to_hex(sha1);
902 char *filename;
903 char *url;
904 char tmpfile[PATH_MAX];
905 long prev_posn = 0;
906 char range[RANGE_HEADER_SIZE];
907 struct curl_slist *range_header = NULL;
908
909 FILE *indexfile;
910 struct active_request_slot *slot;
911 struct slot_results results;
912
913 /* Don't use the index if the pack isn't there */
914 url = xmalloc(strlen(remote->url) + 64);
915 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
916 slot = get_active_slot();
917 slot->results = &results;
918 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
919 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
920 if (start_active_slot(slot)) {
921 run_active_slot(slot);
922 if (results.curl_result != CURLE_OK) {
923 free(url);
924 return error("Unable to verify pack %s is available",
925 hex);
926 }
927 } else {
928 free(url);
929 return error("Unable to start request");
930 }
931
932 if (has_pack_index(sha1)) {
933 free(url);
934 return 0;
935 }
936
937 if (push_verbosely)
938 fprintf(stderr, "Getting index for pack %s\n", hex);
939
940 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
941
942 filename = sha1_pack_index_name(sha1);
943 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
944 indexfile = fopen(tmpfile, "a");
945 if (!indexfile) {
946 free(url);
947 return error("Unable to open local file %s for pack index",
948 tmpfile);
949 }
950
951 slot = get_active_slot();
952 slot->results = &results;
953 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
954 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
955 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
956 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
957 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
958 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
959 slot->local = indexfile;
960
961 /* If there is data present from a previous transfer attempt,
962 resume where it left off */
963 prev_posn = ftell(indexfile);
964 if (prev_posn>0) {
965 if (push_verbosely)
966 fprintf(stderr,
967 "Resuming fetch of index for pack %s at byte %ld\n",
968 hex, prev_posn);
969 sprintf(range, "Range: bytes=%ld-", prev_posn);
970 range_header = curl_slist_append(range_header, range);
971 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
972 }
973
974 if (start_active_slot(slot)) {
975 run_active_slot(slot);
976 if (results.curl_result != CURLE_OK) {
977 free(url);
978 fclose(indexfile);
979 return error("Unable to get pack index %s\n%s", url,
980 curl_errorstr);
981 }
982 } else {
983 free(url);
984 fclose(indexfile);
985 return error("Unable to start request");
986 }
987
988 free(url);
989 fclose(indexfile);
990
991 return move_temp_to_file(tmpfile, filename);
992 }
993
994 static int setup_index(unsigned char *sha1)
995 {
996 struct packed_git *new_pack;
997
998 if (fetch_index(sha1))
999 return -1;
1000
1001 new_pack = parse_pack_index(sha1);
1002 new_pack->next = remote->packs;
1003 remote->packs = new_pack;
1004 return 0;
1005 }
1006
1007 static int fetch_indices(void)
1008 {
1009 unsigned char sha1[20];
1010 char *url;
1011 struct buffer buffer;
1012 char *data;
1013 int i = 0;
1014
1015 struct active_request_slot *slot;
1016 struct slot_results results;
1017
1018 data = xcalloc(1, 4096);
1019 buffer.size = 4096;
1020 buffer.posn = 0;
1021 buffer.buffer = data;
1022
1023 if (push_verbosely)
1024 fprintf(stderr, "Getting pack list\n");
1025
1026 url = xmalloc(strlen(remote->url) + 20);
1027 sprintf(url, "%sobjects/info/packs", remote->url);
1028
1029 slot = get_active_slot();
1030 slot->results = &results;
1031 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1032 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1033 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1034 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1035 if (start_active_slot(slot)) {
1036 run_active_slot(slot);
1037 if (results.curl_result != CURLE_OK) {
1038 free(buffer.buffer);
1039 free(url);
1040 if (results.http_code == 404)
1041 return 0;
1042 else
1043 return error("%s", curl_errorstr);
1044 }
1045 } else {
1046 free(buffer.buffer);
1047 free(url);
1048 return error("Unable to start request");
1049 }
1050 free(url);
1051
1052 data = buffer.buffer;
1053 while (i < buffer.posn) {
1054 switch (data[i]) {
1055 case 'P':
1056 i++;
1057 if (i + 52 < buffer.posn &&
1058 !prefixcmp(data + i, " pack-") &&
1059 !prefixcmp(data + i + 46, ".pack\n")) {
1060 get_sha1_hex(data + i + 6, sha1);
1061 setup_index(sha1);
1062 i += 51;
1063 break;
1064 }
1065 default:
1066 while (data[i] != '\n')
1067 i++;
1068 }
1069 i++;
1070 }
1071
1072 free(buffer.buffer);
1073 return 0;
1074 }
1075
1076 static inline int needs_quote(int ch)
1077 {
1078 if (((ch >= 'A') && (ch <= 'Z'))
1079 || ((ch >= 'a') && (ch <= 'z'))
1080 || ((ch >= '0') && (ch <= '9'))
1081 || (ch == '/')
1082 || (ch == '-')
1083 || (ch == '.'))
1084 return 0;
1085 return 1;
1086 }
1087
1088 static inline int hex(int v)
1089 {
1090 if (v < 10) return '0' + v;
1091 else return 'A' + v - 10;
1092 }
1093
1094 static char *quote_ref_url(const char *base, const char *ref)
1095 {
1096 const char *cp;
1097 char *dp, *qref;
1098 int len, baselen, ch;
1099
1100 baselen = strlen(base);
1101 len = baselen + 1;
1102 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1103 if (needs_quote(ch))
1104 len += 2; /* extra two hex plus replacement % */
1105 qref = xmalloc(len);
1106 memcpy(qref, base, baselen);
1107 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1108 if (needs_quote(ch)) {
1109 *dp++ = '%';
1110 *dp++ = hex((ch >> 4) & 0xF);
1111 *dp++ = hex(ch & 0xF);
1112 }
1113 else
1114 *dp++ = ch;
1115 }
1116 *dp = 0;
1117
1118 return qref;
1119 }
1120
1121 int fetch_ref(char *ref, unsigned char *sha1)
1122 {
1123 char *url;
1124 char hex[42];
1125 struct buffer buffer;
1126 char *base = remote->url;
1127 struct active_request_slot *slot;
1128 struct slot_results results;
1129 buffer.size = 41;
1130 buffer.posn = 0;
1131 buffer.buffer = hex;
1132 hex[41] = '\0';
1133
1134 url = quote_ref_url(base, ref);
1135 slot = get_active_slot();
1136 slot->results = &results;
1137 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1138 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1139 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1140 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1141 if (start_active_slot(slot)) {
1142 run_active_slot(slot);
1143 free(url);
1144 if (results.curl_result != CURLE_OK)
1145 return error("Couldn't get %s for %s\n%s",
1146 url, ref, curl_errorstr);
1147 } else {
1148 free(url);
1149 return error("Unable to start request");
1150 }
1151
1152 hex[40] = '\0';
1153 get_sha1_hex(hex, sha1);
1154 return 0;
1155 }
1156
1157 static void one_remote_object(const char *hex)
1158 {
1159 unsigned char sha1[20];
1160 struct object *obj;
1161
1162 if (get_sha1_hex(hex, sha1) != 0)
1163 return;
1164
1165 obj = lookup_object(sha1);
1166 if (!obj)
1167 obj = parse_object(sha1);
1168
1169 /* Ignore remote objects that don't exist locally */
1170 if (!obj)
1171 return;
1172
1173 obj->flags |= REMOTE;
1174 if (!object_list_contains(objects, obj))
1175 object_list_insert(obj, &objects);
1176 }
1177
1178 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1179 {
1180 int *lock_flags = (int *)ctx->userData;
1181
1182 if (tag_closed) {
1183 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1184 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1185 (*lock_flags & DAV_PROP_LOCKWR)) {
1186 *lock_flags |= DAV_LOCK_OK;
1187 }
1188 *lock_flags &= DAV_LOCK_OK;
1189 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1190 *lock_flags |= DAV_PROP_LOCKWR;
1191 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1192 *lock_flags |= DAV_PROP_LOCKEX;
1193 }
1194 }
1195 }
1196
1197 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1198 {
1199 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1200
1201 if (tag_closed && ctx->cdata) {
1202 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1203 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1204 strcpy(lock->owner, ctx->cdata);
1205 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1206 if (!prefixcmp(ctx->cdata, "Second-"))
1207 lock->timeout =
1208 strtol(ctx->cdata + 7, NULL, 10);
1209 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1210 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1211 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1212 strcpy(lock->token, ctx->cdata + 16);
1213 }
1214 }
1215 }
1216 }
1217
1218 static void one_remote_ref(char *refname);
1219
1220 static void
1221 xml_start_tag(void *userData, const char *name, const char **atts)
1222 {
1223 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1224 const char *c = strchr(name, ':');
1225 int new_len;
1226
1227 if (c == NULL)
1228 c = name;
1229 else
1230 c++;
1231
1232 new_len = strlen(ctx->name) + strlen(c) + 2;
1233
1234 if (new_len > ctx->len) {
1235 ctx->name = xrealloc(ctx->name, new_len);
1236 ctx->len = new_len;
1237 }
1238 strcat(ctx->name, ".");
1239 strcat(ctx->name, c);
1240
1241 free(ctx->cdata);
1242 ctx->cdata = NULL;
1243
1244 ctx->userFunc(ctx, 0);
1245 }
1246
1247 static void
1248 xml_end_tag(void *userData, const char *name)
1249 {
1250 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1251 const char *c = strchr(name, ':');
1252 char *ep;
1253
1254 ctx->userFunc(ctx, 1);
1255
1256 if (c == NULL)
1257 c = name;
1258 else
1259 c++;
1260
1261 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1262 *ep = 0;
1263 }
1264
1265 static void
1266 xml_cdata(void *userData, const XML_Char *s, int len)
1267 {
1268 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1269 free(ctx->cdata);
1270 ctx->cdata = xmemdupz(s, len);
1271 }
1272
1273 static struct remote_lock *lock_remote(const char *path, long timeout)
1274 {
1275 struct active_request_slot *slot;
1276 struct slot_results results;
1277 struct buffer out_buffer;
1278 struct buffer in_buffer;
1279 char *out_data;
1280 char *in_data;
1281 char *url;
1282 char *ep;
1283 char timeout_header[25];
1284 struct remote_lock *lock = NULL;
1285 struct curl_slist *dav_headers = NULL;
1286 struct xml_ctx ctx;
1287
1288 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1289 sprintf(url, "%s%s", remote->url, path);
1290
1291 /* Make sure leading directories exist for the remote ref */
1292 ep = strchr(url + strlen(remote->url) + 1, '/');
1293 while (ep) {
1294 *ep = 0;
1295 slot = get_active_slot();
1296 slot->results = &results;
1297 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1298 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1299 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1300 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1301 if (start_active_slot(slot)) {
1302 run_active_slot(slot);
1303 if (results.curl_result != CURLE_OK &&
1304 results.http_code != 405) {
1305 fprintf(stderr,
1306 "Unable to create branch path %s\n",
1307 url);
1308 free(url);
1309 return NULL;
1310 }
1311 } else {
1312 fprintf(stderr, "Unable to start MKCOL request\n");
1313 free(url);
1314 return NULL;
1315 }
1316 *ep = '/';
1317 ep = strchr(ep + 1, '/');
1318 }
1319
1320 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1321 out_data = xmalloc(out_buffer.size + 1);
1322 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1323 out_buffer.posn = 0;
1324 out_buffer.buffer = out_data;
1325
1326 in_buffer.size = 4096;
1327 in_data = xmalloc(in_buffer.size);
1328 in_buffer.posn = 0;
1329 in_buffer.buffer = in_data;
1330
1331 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1332 dav_headers = curl_slist_append(dav_headers, timeout_header);
1333 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1334
1335 slot = get_active_slot();
1336 slot->results = &results;
1337 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1338 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1339 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1340 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1341 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1342 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1343 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1344 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1345 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1346
1347 lock = xcalloc(1, sizeof(*lock));
1348 lock->timeout = -1;
1349
1350 if (start_active_slot(slot)) {
1351 run_active_slot(slot);
1352 if (results.curl_result == CURLE_OK) {
1353 XML_Parser parser = XML_ParserCreate(NULL);
1354 enum XML_Status result;
1355 ctx.name = xcalloc(10, 1);
1356 ctx.len = 0;
1357 ctx.cdata = NULL;
1358 ctx.userFunc = handle_new_lock_ctx;
1359 ctx.userData = lock;
1360 XML_SetUserData(parser, &ctx);
1361 XML_SetElementHandler(parser, xml_start_tag,
1362 xml_end_tag);
1363 XML_SetCharacterDataHandler(parser, xml_cdata);
1364 result = XML_Parse(parser, in_buffer.buffer,
1365 in_buffer.posn, 1);
1366 free(ctx.name);
1367 if (result != XML_STATUS_OK) {
1368 fprintf(stderr, "XML error: %s\n",
1369 XML_ErrorString(
1370 XML_GetErrorCode(parser)));
1371 lock->timeout = -1;
1372 }
1373 XML_ParserFree(parser);
1374 }
1375 } else {
1376 fprintf(stderr, "Unable to start LOCK request\n");
1377 }
1378
1379 curl_slist_free_all(dav_headers);
1380 free(out_data);
1381 free(in_data);
1382
1383 if (lock->token == NULL || lock->timeout <= 0) {
1384 if (lock->token != NULL)
1385 free(lock->token);
1386 if (lock->owner != NULL)
1387 free(lock->owner);
1388 free(url);
1389 free(lock);
1390 lock = NULL;
1391 } else {
1392 lock->url = url;
1393 lock->start_time = time(NULL);
1394 lock->next = remote->locks;
1395 remote->locks = lock;
1396 }
1397
1398 return lock;
1399 }
1400
1401 static int unlock_remote(struct remote_lock *lock)
1402 {
1403 struct active_request_slot *slot;
1404 struct slot_results results;
1405 struct remote_lock *prev = remote->locks;
1406 char *lock_token_header;
1407 struct curl_slist *dav_headers = NULL;
1408 int rc = 0;
1409
1410 lock_token_header = xmalloc(strlen(lock->token) + 31);
1411 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1412 lock->token);
1413 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1414
1415 slot = get_active_slot();
1416 slot->results = &results;
1417 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1418 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1419 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1420 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1421
1422 if (start_active_slot(slot)) {
1423 run_active_slot(slot);
1424 if (results.curl_result == CURLE_OK)
1425 rc = 1;
1426 else
1427 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1428 results.http_code);
1429 } else {
1430 fprintf(stderr, "Unable to start UNLOCK request\n");
1431 }
1432
1433 curl_slist_free_all(dav_headers);
1434 free(lock_token_header);
1435
1436 if (remote->locks == lock) {
1437 remote->locks = lock->next;
1438 } else {
1439 while (prev && prev->next != lock)
1440 prev = prev->next;
1441 if (prev)
1442 prev->next = prev->next->next;
1443 }
1444
1445 if (lock->owner != NULL)
1446 free(lock->owner);
1447 free(lock->url);
1448 free(lock->token);
1449 free(lock);
1450
1451 return rc;
1452 }
1453
1454 static void remote_ls(const char *path, int flags,
1455 void (*userFunc)(struct remote_ls_ctx *ls),
1456 void *userData);
1457
1458 static void process_ls_object(struct remote_ls_ctx *ls)
1459 {
1460 unsigned int *parent = (unsigned int *)ls->userData;
1461 char *path = ls->dentry_name;
1462 char *obj_hex;
1463
1464 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1465 remote_dir_exists[*parent] = 1;
1466 return;
1467 }
1468
1469 if (strlen(path) != 49)
1470 return;
1471 path += 8;
1472 obj_hex = xmalloc(strlen(path));
1473 /* NB: path is not null-terminated, can not use strlcpy here */
1474 memcpy(obj_hex, path, 2);
1475 strcpy(obj_hex + 2, path + 3);
1476 one_remote_object(obj_hex);
1477 free(obj_hex);
1478 }
1479
1480 static void process_ls_ref(struct remote_ls_ctx *ls)
1481 {
1482 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1483 fprintf(stderr, " %s\n", ls->dentry_name);
1484 return;
1485 }
1486
1487 if (!(ls->dentry_flags & IS_DIR))
1488 one_remote_ref(ls->dentry_name);
1489 }
1490
1491 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1492 {
1493 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1494
1495 if (tag_closed) {
1496 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1497 if (ls->dentry_flags & IS_DIR) {
1498 if (ls->flags & PROCESS_DIRS) {
1499 ls->userFunc(ls);
1500 }
1501 if (strcmp(ls->dentry_name, ls->path) &&
1502 ls->flags & RECURSIVE) {
1503 remote_ls(ls->dentry_name,
1504 ls->flags,
1505 ls->userFunc,
1506 ls->userData);
1507 }
1508 } else if (ls->flags & PROCESS_FILES) {
1509 ls->userFunc(ls);
1510 }
1511 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1512 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1513 remote->path_len + 1);
1514 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1515 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1516 ls->dentry_flags |= IS_DIR;
1517 }
1518 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1519 free(ls->dentry_name);
1520 ls->dentry_name = NULL;
1521 ls->dentry_flags = 0;
1522 }
1523 }
1524
1525 static void remote_ls(const char *path, int flags,
1526 void (*userFunc)(struct remote_ls_ctx *ls),
1527 void *userData)
1528 {
1529 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1530 struct active_request_slot *slot;
1531 struct slot_results results;
1532 struct buffer in_buffer;
1533 struct buffer out_buffer;
1534 char *in_data;
1535 char *out_data;
1536 struct curl_slist *dav_headers = NULL;
1537 struct xml_ctx ctx;
1538 struct remote_ls_ctx ls;
1539
1540 ls.flags = flags;
1541 ls.path = xstrdup(path);
1542 ls.dentry_name = NULL;
1543 ls.dentry_flags = 0;
1544 ls.userData = userData;
1545 ls.userFunc = userFunc;
1546
1547 sprintf(url, "%s%s", remote->url, path);
1548
1549 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1550 out_data = xmalloc(out_buffer.size + 1);
1551 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1552 out_buffer.posn = 0;
1553 out_buffer.buffer = out_data;
1554
1555 in_buffer.size = 4096;
1556 in_data = xmalloc(in_buffer.size);
1557 in_buffer.posn = 0;
1558 in_buffer.buffer = in_data;
1559
1560 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1561 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1562
1563 slot = get_active_slot();
1564 slot->results = &results;
1565 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1566 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1567 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1568 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1569 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1570 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1571 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1572 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1573 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1574
1575 if (start_active_slot(slot)) {
1576 run_active_slot(slot);
1577 if (results.curl_result == CURLE_OK) {
1578 XML_Parser parser = XML_ParserCreate(NULL);
1579 enum XML_Status result;
1580 ctx.name = xcalloc(10, 1);
1581 ctx.len = 0;
1582 ctx.cdata = NULL;
1583 ctx.userFunc = handle_remote_ls_ctx;
1584 ctx.userData = &ls;
1585 XML_SetUserData(parser, &ctx);
1586 XML_SetElementHandler(parser, xml_start_tag,
1587 xml_end_tag);
1588 XML_SetCharacterDataHandler(parser, xml_cdata);
1589 result = XML_Parse(parser, in_buffer.buffer,
1590 in_buffer.posn, 1);
1591 free(ctx.name);
1592
1593 if (result != XML_STATUS_OK) {
1594 fprintf(stderr, "XML error: %s\n",
1595 XML_ErrorString(
1596 XML_GetErrorCode(parser)));
1597 }
1598 XML_ParserFree(parser);
1599 }
1600 } else {
1601 fprintf(stderr, "Unable to start PROPFIND request\n");
1602 }
1603
1604 free(ls.path);
1605 free(url);
1606 free(out_data);
1607 free(in_buffer.buffer);
1608 curl_slist_free_all(dav_headers);
1609 }
1610
1611 static void get_remote_object_list(unsigned char parent)
1612 {
1613 char path[] = "objects/XX/";
1614 static const char hex[] = "0123456789abcdef";
1615 unsigned int val = parent;
1616
1617 path[8] = hex[val >> 4];
1618 path[9] = hex[val & 0xf];
1619 remote_dir_exists[val] = 0;
1620 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1621 process_ls_object, &val);
1622 }
1623
1624 static int locking_available(void)
1625 {
1626 struct active_request_slot *slot;
1627 struct slot_results results;
1628 struct buffer in_buffer;
1629 struct buffer out_buffer;
1630 char *in_data;
1631 char *out_data;
1632 struct curl_slist *dav_headers = NULL;
1633 struct xml_ctx ctx;
1634 int lock_flags = 0;
1635
1636 out_buffer.size =
1637 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1638 strlen(remote->url) - 2;
1639 out_data = xmalloc(out_buffer.size + 1);
1640 snprintf(out_data, out_buffer.size + 1,
1641 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1642 out_buffer.posn = 0;
1643 out_buffer.buffer = out_data;
1644
1645 in_buffer.size = 4096;
1646 in_data = xmalloc(in_buffer.size);
1647 in_buffer.posn = 0;
1648 in_buffer.buffer = in_data;
1649
1650 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1651 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1652
1653 slot = get_active_slot();
1654 slot->results = &results;
1655 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1656 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1657 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1658 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1659 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1660 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1661 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1662 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1663 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1664
1665 if (start_active_slot(slot)) {
1666 run_active_slot(slot);
1667 if (results.curl_result == CURLE_OK) {
1668 XML_Parser parser = XML_ParserCreate(NULL);
1669 enum XML_Status result;
1670 ctx.name = xcalloc(10, 1);
1671 ctx.len = 0;
1672 ctx.cdata = NULL;
1673 ctx.userFunc = handle_lockprop_ctx;
1674 ctx.userData = &lock_flags;
1675 XML_SetUserData(parser, &ctx);
1676 XML_SetElementHandler(parser, xml_start_tag,
1677 xml_end_tag);
1678 result = XML_Parse(parser, in_buffer.buffer,
1679 in_buffer.posn, 1);
1680 free(ctx.name);
1681
1682 if (result != XML_STATUS_OK) {
1683 fprintf(stderr, "XML error: %s\n",
1684 XML_ErrorString(
1685 XML_GetErrorCode(parser)));
1686 lock_flags = 0;
1687 }
1688 XML_ParserFree(parser);
1689 }
1690 } else {
1691 fprintf(stderr, "Unable to start PROPFIND request\n");
1692 }
1693
1694 free(out_data);
1695 free(in_buffer.buffer);
1696 curl_slist_free_all(dav_headers);
1697
1698 return lock_flags;
1699 }
1700
1701 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1702 {
1703 struct object_list *entry = xmalloc(sizeof(struct object_list));
1704 entry->item = obj;
1705 entry->next = *p;
1706 *p = entry;
1707 return &entry->next;
1708 }
1709
1710 static struct object_list **process_blob(struct blob *blob,
1711 struct object_list **p,
1712 struct name_path *path,
1713 const char *name)
1714 {
1715 struct object *obj = &blob->object;
1716
1717 obj->flags |= LOCAL;
1718
1719 if (obj->flags & (UNINTERESTING | SEEN))
1720 return p;
1721
1722 obj->flags |= SEEN;
1723 return add_one_object(obj, p);
1724 }
1725
1726 static struct object_list **process_tree(struct tree *tree,
1727 struct object_list **p,
1728 struct name_path *path,
1729 const char *name)
1730 {
1731 struct object *obj = &tree->object;
1732 struct tree_desc desc;
1733 struct name_entry entry;
1734 struct name_path me;
1735
1736 obj->flags |= LOCAL;
1737
1738 if (obj->flags & (UNINTERESTING | SEEN))
1739 return p;
1740 if (parse_tree(tree) < 0)
1741 die("bad tree object %s", sha1_to_hex(obj->sha1));
1742
1743 obj->flags |= SEEN;
1744 name = xstrdup(name);
1745 p = add_one_object(obj, p);
1746 me.up = path;
1747 me.elem = name;
1748 me.elem_len = strlen(name);
1749
1750 init_tree_desc(&desc, tree->buffer, tree->size);
1751
1752 while (tree_entry(&desc, &entry)) {
1753 if (S_ISDIR(entry.mode))
1754 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1755 else
1756 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1757 }
1758 free(tree->buffer);
1759 tree->buffer = NULL;
1760 return p;
1761 }
1762
1763 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1764 {
1765 int i;
1766 struct commit *commit;
1767 struct object_list **p = &objects;
1768 int count = 0;
1769
1770 while ((commit = get_revision(revs)) != NULL) {
1771 p = process_tree(commit->tree, p, NULL, "");
1772 commit->object.flags |= LOCAL;
1773 if (!(commit->object.flags & UNINTERESTING))
1774 count += add_send_request(&commit->object, lock);
1775 }
1776
1777 for (i = 0; i < revs->pending.nr; i++) {
1778 struct object_array_entry *entry = revs->pending.objects + i;
1779 struct object *obj = entry->item;
1780 const char *name = entry->name;
1781
1782 if (obj->flags & (UNINTERESTING | SEEN))
1783 continue;
1784 if (obj->type == OBJ_TAG) {
1785 obj->flags |= SEEN;
1786 p = add_one_object(obj, p);
1787 continue;
1788 }
1789 if (obj->type == OBJ_TREE) {
1790 p = process_tree((struct tree *)obj, p, NULL, name);
1791 continue;
1792 }
1793 if (obj->type == OBJ_BLOB) {
1794 p = process_blob((struct blob *)obj, p, NULL, name);
1795 continue;
1796 }
1797 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1798 }
1799
1800 while (objects) {
1801 if (!(objects->item->flags & UNINTERESTING))
1802 count += add_send_request(objects->item, lock);
1803 objects = objects->next;
1804 }
1805
1806 return count;
1807 }
1808
1809 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1810 {
1811 struct active_request_slot *slot;
1812 struct slot_results results;
1813 char *out_data;
1814 char *if_header;
1815 struct buffer out_buffer;
1816 struct curl_slist *dav_headers = NULL;
1817 int i;
1818
1819 if_header = xmalloc(strlen(lock->token) + 25);
1820 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1821 dav_headers = curl_slist_append(dav_headers, if_header);
1822
1823 out_buffer.size = 41;
1824 out_data = xmalloc(out_buffer.size + 1);
1825 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1826 if (i != out_buffer.size) {
1827 fprintf(stderr, "Unable to initialize PUT request body\n");
1828 return 0;
1829 }
1830 out_buffer.posn = 0;
1831 out_buffer.buffer = out_data;
1832
1833 slot = get_active_slot();
1834 slot->results = &results;
1835 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1836 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1837 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1838 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1839 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1840 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1841 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1842 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1843 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1844
1845 if (start_active_slot(slot)) {
1846 run_active_slot(slot);
1847 free(out_data);
1848 free(if_header);
1849 if (results.curl_result != CURLE_OK) {
1850 fprintf(stderr,
1851 "PUT error: curl result=%d, HTTP code=%ld\n",
1852 results.curl_result, results.http_code);
1853 /* We should attempt recovery? */
1854 return 0;
1855 }
1856 } else {
1857 free(out_data);
1858 free(if_header);
1859 fprintf(stderr, "Unable to start PUT request\n");
1860 return 0;
1861 }
1862
1863 return 1;
1864 }
1865
1866 static struct ref *local_refs, **local_tail;
1867 static struct ref *remote_refs, **remote_tail;
1868
1869 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1870 {
1871 struct ref *ref;
1872 int len = strlen(refname) + 1;
1873 ref = xcalloc(1, sizeof(*ref) + len);
1874 hashcpy(ref->new_sha1, sha1);
1875 memcpy(ref->name, refname, len);
1876 *local_tail = ref;
1877 local_tail = &ref->next;
1878 return 0;
1879 }
1880
1881 static void one_remote_ref(char *refname)
1882 {
1883 struct ref *ref;
1884 unsigned char remote_sha1[20];
1885 struct object *obj;
1886 int len = strlen(refname) + 1;
1887
1888 if (fetch_ref(refname, remote_sha1) != 0) {
1889 fprintf(stderr,
1890 "Unable to fetch ref %s from %s\n",
1891 refname, remote->url);
1892 return;
1893 }
1894
1895 /*
1896 * Fetch a copy of the object if it doesn't exist locally - it
1897 * may be required for updating server info later.
1898 */
1899 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1900 obj = lookup_unknown_object(remote_sha1);
1901 if (obj) {
1902 fprintf(stderr, " fetch %s for %s\n",
1903 sha1_to_hex(remote_sha1), refname);
1904 add_fetch_request(obj);
1905 }
1906 }
1907
1908 ref = xcalloc(1, sizeof(*ref) + len);
1909 hashcpy(ref->old_sha1, remote_sha1);
1910 memcpy(ref->name, refname, len);
1911 *remote_tail = ref;
1912 remote_tail = &ref->next;
1913 }
1914
1915 static void get_local_heads(void)
1916 {
1917 local_tail = &local_refs;
1918 for_each_ref(one_local_ref, NULL);
1919 }
1920
1921 static void get_dav_remote_heads(void)
1922 {
1923 remote_tail = &remote_refs;
1924 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1925 }
1926
1927 static int is_zero_sha1(const unsigned char *sha1)
1928 {
1929 int i;
1930
1931 for (i = 0; i < 20; i++) {
1932 if (*sha1++)
1933 return 0;
1934 }
1935 return 1;
1936 }
1937
1938 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1939 {
1940 while (list) {
1941 struct commit_list *temp = list;
1942 temp->item->object.flags &= ~mark;
1943 list = temp->next;
1944 free(temp);
1945 }
1946 }
1947
1948 static int ref_newer(const unsigned char *new_sha1,
1949 const unsigned char *old_sha1)
1950 {
1951 struct object *o;
1952 struct commit *old, *new;
1953 struct commit_list *list, *used;
1954 int found = 0;
1955
1956 /* Both new and old must be commit-ish and new is descendant of
1957 * old. Otherwise we require --force.
1958 */
1959 o = deref_tag(parse_object(old_sha1), NULL, 0);
1960 if (!o || o->type != OBJ_COMMIT)
1961 return 0;
1962 old = (struct commit *) o;
1963
1964 o = deref_tag(parse_object(new_sha1), NULL, 0);
1965 if (!o || o->type != OBJ_COMMIT)
1966 return 0;
1967 new = (struct commit *) o;
1968
1969 if (parse_commit(new) < 0)
1970 return 0;
1971
1972 used = list = NULL;
1973 commit_list_insert(new, &list);
1974 while (list) {
1975 new = pop_most_recent_commit(&list, TMP_MARK);
1976 commit_list_insert(new, &used);
1977 if (new == old) {
1978 found = 1;
1979 break;
1980 }
1981 }
1982 unmark_and_free(list, TMP_MARK);
1983 unmark_and_free(used, TMP_MARK);
1984 return found;
1985 }
1986
1987 static void mark_edge_parents_uninteresting(struct commit *commit)
1988 {
1989 struct commit_list *parents;
1990
1991 for (parents = commit->parents; parents; parents = parents->next) {
1992 struct commit *parent = parents->item;
1993 if (!(parent->object.flags & UNINTERESTING))
1994 continue;
1995 mark_tree_uninteresting(parent->tree);
1996 }
1997 }
1998
1999 static void mark_edges_uninteresting(struct commit_list *list)
2000 {
2001 for ( ; list; list = list->next) {
2002 struct commit *commit = list->item;
2003
2004 if (commit->object.flags & UNINTERESTING) {
2005 mark_tree_uninteresting(commit->tree);
2006 continue;
2007 }
2008 mark_edge_parents_uninteresting(commit);
2009 }
2010 }
2011
2012 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2013 {
2014 struct buffer *buf = (struct buffer *)ls->userData;
2015 unsigned char remote_sha1[20];
2016 struct object *o;
2017 int len;
2018 char *ref_info;
2019
2020 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2021 fprintf(stderr,
2022 "Unable to fetch ref %s from %s\n",
2023 ls->dentry_name, remote->url);
2024 aborted = 1;
2025 return;
2026 }
2027
2028 o = parse_object(remote_sha1);
2029 if (!o) {
2030 fprintf(stderr,
2031 "Unable to parse object %s for remote ref %s\n",
2032 sha1_to_hex(remote_sha1), ls->dentry_name);
2033 aborted = 1;
2034 return;
2035 }
2036
2037 len = strlen(ls->dentry_name) + 42;
2038 ref_info = xcalloc(len + 1, 1);
2039 sprintf(ref_info, "%s %s\n",
2040 sha1_to_hex(remote_sha1), ls->dentry_name);
2041 fwrite_buffer(ref_info, 1, len, buf);
2042 free(ref_info);
2043
2044 if (o->type == OBJ_TAG) {
2045 o = deref_tag(o, ls->dentry_name, 0);
2046 if (o) {
2047 len = strlen(ls->dentry_name) + 45;
2048 ref_info = xcalloc(len + 1, 1);
2049 sprintf(ref_info, "%s %s^{}\n",
2050 sha1_to_hex(o->sha1), ls->dentry_name);
2051 fwrite_buffer(ref_info, 1, len, buf);
2052 free(ref_info);
2053 }
2054 }
2055 }
2056
2057 static void update_remote_info_refs(struct remote_lock *lock)
2058 {
2059 struct buffer buffer;
2060 struct active_request_slot *slot;
2061 struct slot_results results;
2062 char *if_header;
2063 struct curl_slist *dav_headers = NULL;
2064
2065 buffer.buffer = xcalloc(1, 4096);
2066 buffer.size = 4096;
2067 buffer.posn = 0;
2068 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2069 add_remote_info_ref, &buffer);
2070 if (!aborted) {
2071 if_header = xmalloc(strlen(lock->token) + 25);
2072 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2073 dav_headers = curl_slist_append(dav_headers, if_header);
2074
2075 slot = get_active_slot();
2076 slot->results = &results;
2077 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2078 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2079 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2080 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2081 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2082 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2083 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2084 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2085 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2086
2087 buffer.posn = 0;
2088
2089 if (start_active_slot(slot)) {
2090 run_active_slot(slot);
2091 if (results.curl_result != CURLE_OK) {
2092 fprintf(stderr,
2093 "PUT error: curl result=%d, HTTP code=%ld\n",
2094 results.curl_result, results.http_code);
2095 }
2096 }
2097 free(if_header);
2098 }
2099 free(buffer.buffer);
2100 }
2101
2102 static int remote_exists(const char *path)
2103 {
2104 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2105 struct active_request_slot *slot;
2106 struct slot_results results;
2107
2108 sprintf(url, "%s%s", remote->url, path);
2109
2110 slot = get_active_slot();
2111 slot->results = &results;
2112 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2113 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2114
2115 if (start_active_slot(slot)) {
2116 run_active_slot(slot);
2117 free(url);
2118 if (results.http_code == 404)
2119 return 0;
2120 else if (results.curl_result == CURLE_OK)
2121 return 1;
2122 else
2123 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2124 } else {
2125 free(url);
2126 fprintf(stderr, "Unable to start HEAD request\n");
2127 }
2128
2129 return -1;
2130 }
2131
2132 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2133 {
2134 char *url;
2135 struct buffer buffer;
2136 struct active_request_slot *slot;
2137 struct slot_results results;
2138
2139 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2140 sprintf(url, "%s%s", remote->url, path);
2141
2142 buffer.size = 4096;
2143 buffer.posn = 0;
2144 buffer.buffer = xmalloc(buffer.size);
2145
2146 slot = get_active_slot();
2147 slot->results = &results;
2148 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2149 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2150 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2151 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2152 if (start_active_slot(slot)) {
2153 run_active_slot(slot);
2154 if (results.curl_result != CURLE_OK) {
2155 die("Couldn't get %s for remote symref\n%s",
2156 url, curl_errorstr);
2157 }
2158 } else {
2159 die("Unable to start remote symref request");
2160 }
2161 free(url);
2162
2163 if (*symref != NULL)
2164 free(*symref);
2165 *symref = NULL;
2166 hashclr(sha1);
2167
2168 if (buffer.posn == 0)
2169 return;
2170
2171 /* If it's a symref, set the refname; otherwise try for a sha1 */
2172 if (!prefixcmp((char *)buffer.buffer, "ref: ")) {
2173 *symref = xmemdupz((char *)buffer.buffer + 5, buffer.posn - 6);
2174 } else {
2175 get_sha1_hex(buffer.buffer, sha1);
2176 }
2177
2178 free(buffer.buffer);
2179 }
2180
2181 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2182 {
2183 struct commit *head = lookup_commit(head_sha1);
2184 struct commit *branch = lookup_commit(branch_sha1);
2185 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2186
2187 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2188 }
2189
2190 static int delete_remote_branch(char *pattern, int force)
2191 {
2192 struct ref *refs = remote_refs;
2193 struct ref *remote_ref = NULL;
2194 unsigned char head_sha1[20];
2195 char *symref = NULL;
2196 int match;
2197 int patlen = strlen(pattern);
2198 int i;
2199 struct active_request_slot *slot;
2200 struct slot_results results;
2201 char *url;
2202
2203 /* Find the remote branch(es) matching the specified branch name */
2204 for (match = 0; refs; refs = refs->next) {
2205 char *name = refs->name;
2206 int namelen = strlen(name);
2207 if (namelen < patlen ||
2208 memcmp(name + namelen - patlen, pattern, patlen))
2209 continue;
2210 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2211 continue;
2212 match++;
2213 remote_ref = refs;
2214 }
2215 if (match == 0)
2216 return error("No remote branch matches %s", pattern);
2217 if (match != 1)
2218 return error("More than one remote branch matches %s",
2219 pattern);
2220
2221 /*
2222 * Remote HEAD must be a symref (not exactly foolproof; a remote
2223 * symlink to a symref will look like a symref)
2224 */
2225 fetch_symref("HEAD", &symref, head_sha1);
2226 if (!symref)
2227 return error("Remote HEAD is not a symref");
2228
2229 /* Remote branch must not be the remote HEAD */
2230 for (i=0; symref && i<MAXDEPTH; i++) {
2231 if (!strcmp(remote_ref->name, symref))
2232 return error("Remote branch %s is the current HEAD",
2233 remote_ref->name);
2234 fetch_symref(symref, &symref, head_sha1);
2235 }
2236
2237 /* Run extra sanity checks if delete is not forced */
2238 if (!force) {
2239 /* Remote HEAD must resolve to a known object */
2240 if (symref)
2241 return error("Remote HEAD symrefs too deep");
2242 if (is_zero_sha1(head_sha1))
2243 return error("Unable to resolve remote HEAD");
2244 if (!has_sha1_file(head_sha1))
2245 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2246
2247 /* Remote branch must resolve to a known object */
2248 if (is_zero_sha1(remote_ref->old_sha1))
2249 return error("Unable to resolve remote branch %s",
2250 remote_ref->name);
2251 if (!has_sha1_file(remote_ref->old_sha1))
2252 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));
2253
2254 /* Remote branch must be an ancestor of remote HEAD */
2255 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2256 return error("The branch '%s' is not an ancestor "
2257 "of your current HEAD.\n"
2258 "If you are sure you want to delete it,"
2259 " run:\n\t'git http-push -D %s %s'",
2260 remote_ref->name, remote->url, pattern);
2261 }
2262 }
2263
2264 /* Send delete request */
2265 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2266 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2267 sprintf(url, "%s%s", remote->url, remote_ref->name);
2268 slot = get_active_slot();
2269 slot->results = &results;
2270 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2271 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2272 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2273 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2274 if (start_active_slot(slot)) {
2275 run_active_slot(slot);
2276 free(url);
2277 if (results.curl_result != CURLE_OK)
2278 return error("DELETE request failed (%d/%ld)\n",
2279 results.curl_result, results.http_code);
2280 } else {
2281 free(url);
2282 return error("Unable to start DELETE request");
2283 }
2284
2285 return 0;
2286 }
2287
2288 int main(int argc, char **argv)
2289 {
2290 struct transfer_request *request;
2291 struct transfer_request *next_request;
2292 int nr_refspec = 0;
2293 char **refspec = NULL;
2294 struct remote_lock *ref_lock = NULL;
2295 struct remote_lock *info_ref_lock = NULL;
2296 struct rev_info revs;
2297 int delete_branch = 0;
2298 int force_delete = 0;
2299 int objects_to_send;
2300 int rc = 0;
2301 int i;
2302 int new_refs;
2303 struct ref *ref;
2304
2305 setup_git_directory();
2306
2307 remote = xcalloc(sizeof(*remote), 1);
2308
2309 argv++;
2310 for (i = 1; i < argc; i++, argv++) {
2311 char *arg = *argv;
2312
2313 if (*arg == '-') {
2314 if (!strcmp(arg, "--all")) {
2315 push_all = MATCH_REFS_ALL;
2316 continue;
2317 }
2318 if (!strcmp(arg, "--force")) {
2319 force_all = 1;
2320 continue;
2321 }
2322 if (!strcmp(arg, "--dry-run")) {
2323 dry_run = 1;
2324 continue;
2325 }
2326 if (!strcmp(arg, "--verbose")) {
2327 push_verbosely = 1;
2328 continue;
2329 }
2330 if (!strcmp(arg, "-d")) {
2331 delete_branch = 1;
2332 continue;
2333 }
2334 if (!strcmp(arg, "-D")) {
2335 delete_branch = 1;
2336 force_delete = 1;
2337 continue;
2338 }
2339 }
2340 if (!remote->url) {
2341 char *path = strstr(arg, "//");
2342 remote->url = arg;
2343 if (path) {
2344 path = strchr(path+2, '/');
2345 if (path)
2346 remote->path_len = strlen(path);
2347 }
2348 continue;
2349 }
2350 refspec = argv;
2351 nr_refspec = argc - i;
2352 break;
2353 }
2354
2355 if (!remote->url)
2356 usage(http_push_usage);
2357
2358 if (delete_branch && nr_refspec != 1)
2359 die("You must specify only one branch name when deleting a remote branch");
2360
2361 memset(remote_dir_exists, -1, 256);
2362
2363 http_init();
2364
2365 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2366 default_headers = curl_slist_append(default_headers, "Range:");
2367 default_headers = curl_slist_append(default_headers, "Destination:");
2368 default_headers = curl_slist_append(default_headers, "If:");
2369 default_headers = curl_slist_append(default_headers,
2370 "Pragma: no-cache");
2371
2372 /* Verify DAV compliance/lock support */
2373 if (!locking_available()) {
2374 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2375 rc = 1;
2376 goto cleanup;
2377 }
2378
2379 /* Check whether the remote has server info files */
2380 remote->can_update_info_refs = 0;
2381 remote->has_info_refs = remote_exists("info/refs");
2382 remote->has_info_packs = remote_exists("objects/info/packs");
2383 if (remote->has_info_refs) {
2384 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2385 if (info_ref_lock)
2386 remote->can_update_info_refs = 1;
2387 }
2388 if (remote->has_info_packs)
2389 fetch_indices();
2390
2391 /* Get a list of all local and remote heads to validate refspecs */
2392 get_local_heads();
2393 fprintf(stderr, "Fetching remote heads...\n");
2394 get_dav_remote_heads();
2395
2396 /* Remove a remote branch if -d or -D was specified */
2397 if (delete_branch) {
2398 if (delete_remote_branch(refspec[0], force_delete) == -1)
2399 fprintf(stderr, "Unable to delete remote branch %s\n",
2400 refspec[0]);
2401 goto cleanup;
2402 }
2403
2404 /* match them up */
2405 if (!remote_tail)
2406 remote_tail = &remote_refs;
2407 if (match_refs(local_refs, remote_refs, &remote_tail,
2408 nr_refspec, (const char **) refspec, push_all))
2409 return -1;
2410 if (!remote_refs) {
2411 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2412 return 0;
2413 }
2414
2415 new_refs = 0;
2416 for (ref = remote_refs; ref; ref = ref->next) {
2417 char old_hex[60], *new_hex;
2418 const char *commit_argv[4];
2419 int commit_argc;
2420 char *new_sha1_hex, *old_sha1_hex;
2421
2422 if (!ref->peer_ref)
2423 continue;
2424 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2425 if (push_verbosely || 1)
2426 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2427 continue;
2428 }
2429
2430 if (!force_all &&
2431 !is_zero_sha1(ref->old_sha1) &&
2432 !ref->force) {
2433 if (!has_sha1_file(ref->old_sha1) ||
2434 !ref_newer(ref->peer_ref->new_sha1,
2435 ref->old_sha1)) {
2436 /*
2437 * We do not have the remote ref, or
2438 * we know that the remote ref is not
2439 * an ancestor of what we are trying to
2440 * push. Either way this can be losing
2441 * commits at the remote end and likely
2442 * we were not up to date to begin with.
2443 */
2444 error("remote '%s' is not an ancestor of\n"
2445 "local '%s'.\n"
2446 "Maybe you are not up-to-date and "
2447 "need to pull first?",
2448 ref->name,
2449 ref->peer_ref->name);
2450 rc = -2;
2451 continue;
2452 }
2453 }
2454 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2455 if (is_zero_sha1(ref->new_sha1)) {
2456 error("cannot happen anymore");
2457 rc = -3;
2458 continue;
2459 }
2460 new_refs++;
2461 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2462 new_hex = sha1_to_hex(ref->new_sha1);
2463
2464 fprintf(stderr, "updating '%s'", ref->name);
2465 if (strcmp(ref->name, ref->peer_ref->name))
2466 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2467 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2468 if (dry_run)
2469 continue;
2470
2471 /* Lock remote branch ref */
2472 ref_lock = lock_remote(ref->name, LOCK_TIME);
2473 if (ref_lock == NULL) {
2474 fprintf(stderr, "Unable to lock remote branch %s\n",
2475 ref->name);
2476 rc = 1;
2477 continue;
2478 }
2479
2480 /* Set up revision info for this refspec */
2481 commit_argc = 3;
2482 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2483 old_sha1_hex = NULL;
2484 commit_argv[1] = "--objects";
2485 commit_argv[2] = new_sha1_hex;
2486 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2487 old_sha1_hex = xmalloc(42);
2488 sprintf(old_sha1_hex, "^%s",
2489 sha1_to_hex(ref->old_sha1));
2490 commit_argv[3] = old_sha1_hex;
2491 commit_argc++;
2492 }
2493 init_revisions(&revs, setup_git_directory());
2494 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2495 free(new_sha1_hex);
2496 if (old_sha1_hex) {
2497 free(old_sha1_hex);
2498 commit_argv[1] = NULL;
2499 }
2500
2501 /* Generate a list of objects that need to be pushed */
2502 pushing = 0;
2503 prepare_revision_walk(&revs);
2504 mark_edges_uninteresting(revs.commits);
2505 objects_to_send = get_delta(&revs, ref_lock);
2506 finish_all_active_slots();
2507
2508 /* Push missing objects to remote, this would be a
2509 convenient time to pack them first if appropriate. */
2510 pushing = 1;
2511 if (objects_to_send)
2512 fprintf(stderr, " sending %d objects\n",
2513 objects_to_send);
2514 #ifdef USE_CURL_MULTI
2515 fill_active_slots();
2516 add_fill_function(NULL, fill_active_slot);
2517 #endif
2518 finish_all_active_slots();
2519
2520 /* Update the remote branch if all went well */
2521 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2522 rc = 1;
2523 goto unlock;
2524 }
2525
2526 unlock:
2527 if (!rc)
2528 fprintf(stderr, " done\n");
2529 unlock_remote(ref_lock);
2530 check_locks();
2531 }
2532
2533 /* Update remote server info if appropriate */
2534 if (remote->has_info_refs && new_refs) {
2535 if (info_ref_lock && remote->can_update_info_refs) {
2536 fprintf(stderr, "Updating remote server info\n");
2537 if (!dry_run)
2538 update_remote_info_refs(info_ref_lock);
2539 } else {
2540 fprintf(stderr, "Unable to update server info\n");
2541 }
2542 }
2543 if (info_ref_lock)
2544 unlock_remote(info_ref_lock);
2545
2546 cleanup:
2547 free(remote);
2548
2549 curl_slist_free_all(no_pragma_header);
2550 curl_slist_free_all(default_headers);
2551
2552 http_cleanup();
2553
2554 request = request_queue_head;
2555 while (request != NULL) {
2556 next_request = request->next;
2557 release_request(request);
2558 request = next_request;
2559 }
2560
2561 return rc;
2562 }
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