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git.el: Added a function to diff against the other heads in a merge.
[git/jrn.git] / http-push.c
blob42b0d59e8c15dff0d72b0d3a486d0248bd767dfe
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "fetch.h"
5 #include "tag.h"
6 #include "blob.h"
7 #include "http.h"
8 #include "refs.h"
9 #include "revision.h"
10
11 #include <expat.h>
12
13 static const char http_push_usage[] =
14 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
15
16 #ifndef XML_STATUS_OK
17 enum XML_Status {
18 XML_STATUS_OK = 1,
19 XML_STATUS_ERROR = 0
20 };
21 #define XML_STATUS_OK 1
22 #define XML_STATUS_ERROR 0
23 #endif
24
25 #define PREV_BUF_SIZE 4096
26 #define RANGE_HEADER_SIZE 30
27
28 /* DAV methods */
29 #define DAV_LOCK "LOCK"
30 #define DAV_MKCOL "MKCOL"
31 #define DAV_MOVE "MOVE"
32 #define DAV_PROPFIND "PROPFIND"
33 #define DAV_PUT "PUT"
34 #define DAV_UNLOCK "UNLOCK"
35
36 /* DAV lock flags */
37 #define DAV_PROP_LOCKWR (1u << 0)
38 #define DAV_PROP_LOCKEX (1u << 1)
39 #define DAV_LOCK_OK (1u << 2)
40
41 /* DAV XML properties */
42 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
43 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
44 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
45 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
46 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
47 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
48 #define DAV_PROPFIND_RESP ".multistatus.response"
49 #define DAV_PROPFIND_NAME ".multistatus.response.href"
50 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
51
52 /* DAV request body templates */
53 #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>"
54 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
55 #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>"
56
57 #define LOCK_TIME 600
58 #define LOCK_REFRESH 30
59
60 /* bits #0-4 in revision.h */
61
62 #define LOCAL (1u << 5)
63 #define REMOTE (1u << 6)
64 #define FETCHING (1u << 7)
65 #define PUSHING (1u << 8)
66
67 static int pushing = 0;
68 static int aborted = 0;
69 static char remote_dir_exists[256];
70
71 static struct curl_slist *no_pragma_header;
72 static struct curl_slist *default_headers;
73
74 static int push_verbosely = 0;
75 static int push_all = 0;
76 static int force_all = 0;
77
78 static struct object_list *objects = NULL;
79
80 struct repo
81 {
82 char *url;
83 int path_len;
84 int has_info_refs;
85 int can_update_info_refs;
86 int has_info_packs;
87 struct packed_git *packs;
88 struct remote_lock *locks;
89 };
90
91 static struct repo *remote = NULL;
92
93 enum transfer_state {
94 NEED_FETCH,
95 RUN_FETCH_LOOSE,
96 RUN_FETCH_PACKED,
97 NEED_PUSH,
98 RUN_MKCOL,
99 RUN_PUT,
100 RUN_MOVE,
101 ABORTED,
102 COMPLETE,
103 };
104
105 struct transfer_request
106 {
107 struct object *obj;
108 char *url;
109 char *dest;
110 struct remote_lock *lock;
111 struct curl_slist *headers;
112 struct buffer buffer;
113 char filename[PATH_MAX];
114 char tmpfile[PATH_MAX];
115 int local_fileno;
116 FILE *local_stream;
117 enum transfer_state state;
118 CURLcode curl_result;
119 char errorstr[CURL_ERROR_SIZE];
120 long http_code;
121 unsigned char real_sha1[20];
122 SHA_CTX c;
123 z_stream stream;
124 int zret;
125 int rename;
126 void *userData;
127 struct active_request_slot *slot;
128 struct transfer_request *next;
129 };
130
131 static struct transfer_request *request_queue_head = NULL;
132
133 struct xml_ctx
134 {
135 char *name;
136 int len;
137 char *cdata;
138 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
139 void *userData;
140 };
141
142 struct remote_lock
143 {
144 char *url;
145 char *owner;
146 char *token;
147 time_t start_time;
148 long timeout;
149 int refreshing;
150 struct remote_lock *next;
151 };
152
153 /* Flags that control remote_ls processing */
154 #define PROCESS_FILES (1u << 0)
155 #define PROCESS_DIRS (1u << 1)
156 #define RECURSIVE (1u << 2)
157
158 /* Flags that remote_ls passes to callback functions */
159 #define IS_DIR (1u << 0)
160
161 struct remote_ls_ctx
162 {
163 char *path;
164 void (*userFunc)(struct remote_ls_ctx *ls);
165 void *userData;
166 int flags;
167 char *dentry_name;
168 int dentry_flags;
169 struct remote_ls_ctx *parent;
170 };
171
172 static void finish_request(struct transfer_request *request);
173 static void release_request(struct transfer_request *request);
174
175 static void process_response(void *callback_data)
176 {
177 struct transfer_request *request =
178 (struct transfer_request *)callback_data;
179
180 finish_request(request);
181 }
182
183 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
184 void *data)
185 {
186 unsigned char expn[4096];
187 size_t size = eltsize * nmemb;
188 int posn = 0;
189 struct transfer_request *request = (struct transfer_request *)data;
190 do {
191 ssize_t retval = write(request->local_fileno,
192 ptr + posn, size - posn);
193 if (retval < 0)
194 return posn;
195 posn += retval;
196 } while (posn < size);
197
198 request->stream.avail_in = size;
199 request->stream.next_in = ptr;
200 do {
201 request->stream.next_out = expn;
202 request->stream.avail_out = sizeof(expn);
203 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
204 SHA1_Update(&request->c, expn,
205 sizeof(expn) - request->stream.avail_out);
206 } while (request->stream.avail_in && request->zret == Z_OK);
207 data_received++;
208 return size;
209 }
210
211 static void start_fetch_loose(struct transfer_request *request)
212 {
213 char *hex = sha1_to_hex(request->obj->sha1);
214 char *filename;
215 char prevfile[PATH_MAX];
216 char *url;
217 char *posn;
218 int prevlocal;
219 unsigned char prev_buf[PREV_BUF_SIZE];
220 ssize_t prev_read = 0;
221 long prev_posn = 0;
222 char range[RANGE_HEADER_SIZE];
223 struct curl_slist *range_header = NULL;
224 struct active_request_slot *slot;
225
226 filename = sha1_file_name(request->obj->sha1);
227 snprintf(request->filename, sizeof(request->filename), "%s", filename);
228 snprintf(request->tmpfile, sizeof(request->tmpfile),
229 "%s.temp", filename);
230
231 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
232 unlink(prevfile);
233 rename(request->tmpfile, prevfile);
234 unlink(request->tmpfile);
235
236 if (request->local_fileno != -1)
237 error("fd leakage in start: %d", request->local_fileno);
238 request->local_fileno = open(request->tmpfile,
239 O_WRONLY | O_CREAT | O_EXCL, 0666);
240 /* This could have failed due to the "lazy directory creation";
241 * try to mkdir the last path component.
242 */
243 if (request->local_fileno < 0 && errno == ENOENT) {
244 char *dir = strrchr(request->tmpfile, '/');
245 if (dir) {
246 *dir = 0;
247 mkdir(request->tmpfile, 0777);
248 *dir = '/';
249 }
250 request->local_fileno = open(request->tmpfile,
251 O_WRONLY | O_CREAT | O_EXCL, 0666);
252 }
253
254 if (request->local_fileno < 0) {
255 request->state = ABORTED;
256 error("Couldn't create temporary file %s for %s: %s",
257 request->tmpfile, request->filename, strerror(errno));
258 return;
259 }
260
261 memset(&request->stream, 0, sizeof(request->stream));
262
263 inflateInit(&request->stream);
264
265 SHA1_Init(&request->c);
266
267 url = xmalloc(strlen(remote->url) + 50);
268 request->url = xmalloc(strlen(remote->url) + 50);
269 strcpy(url, remote->url);
270 posn = url + strlen(remote->url);
271 strcpy(posn, "objects/");
272 posn += 8;
273 memcpy(posn, hex, 2);
274 posn += 2;
275 *(posn++) = '/';
276 strcpy(posn, hex + 2);
277 strcpy(request->url, url);
278
279 /* If a previous temp file is present, process what was already
280 fetched. */
281 prevlocal = open(prevfile, O_RDONLY);
282 if (prevlocal != -1) {
283 do {
284 prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
285 if (prev_read>0) {
286 if (fwrite_sha1_file(prev_buf,
287 1,
288 prev_read,
289 request) == prev_read) {
290 prev_posn += prev_read;
291 } else {
292 prev_read = -1;
293 }
294 }
295 } while (prev_read > 0);
296 close(prevlocal);
297 }
298 unlink(prevfile);
299
300 /* Reset inflate/SHA1 if there was an error reading the previous temp
301 file; also rewind to the beginning of the local file. */
302 if (prev_read == -1) {
303 memset(&request->stream, 0, sizeof(request->stream));
304 inflateInit(&request->stream);
305 SHA1_Init(&request->c);
306 if (prev_posn>0) {
307 prev_posn = 0;
308 lseek(request->local_fileno, SEEK_SET, 0);
309 ftruncate(request->local_fileno, 0);
310 }
311 }
312
313 slot = get_active_slot();
314 slot->callback_func = process_response;
315 slot->callback_data = request;
316 request->slot = slot;
317
318 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
319 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
320 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
321 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
322 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
323
324 /* If we have successfully processed data from a previous fetch
325 attempt, only fetch the data we don't already have. */
326 if (prev_posn>0) {
327 if (push_verbosely)
328 fprintf(stderr,
329 "Resuming fetch of object %s at byte %ld\n",
330 hex, prev_posn);
331 sprintf(range, "Range: bytes=%ld-", prev_posn);
332 range_header = curl_slist_append(range_header, range);
333 curl_easy_setopt(slot->curl,
334 CURLOPT_HTTPHEADER, range_header);
335 }
336
337 /* Try to get the request started, abort the request on error */
338 request->state = RUN_FETCH_LOOSE;
339 if (!start_active_slot(slot)) {
340 fprintf(stderr, "Unable to start GET request\n");
341 remote->can_update_info_refs = 0;
342 release_request(request);
343 }
344 }
345
346 static void start_fetch_packed(struct transfer_request *request)
347 {
348 char *url;
349 struct packed_git *target;
350 FILE *packfile;
351 char *filename;
352 long prev_posn = 0;
353 char range[RANGE_HEADER_SIZE];
354 struct curl_slist *range_header = NULL;
355
356 struct transfer_request *check_request = request_queue_head;
357 struct active_request_slot *slot;
358
359 target = find_sha1_pack(request->obj->sha1, remote->packs);
360 if (!target) {
361 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
362 remote->can_update_info_refs = 0;
363 release_request(request);
364 return;
365 }
366
367 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
368 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
369
370 filename = sha1_pack_name(target->sha1);
371 snprintf(request->filename, sizeof(request->filename), "%s", filename);
372 snprintf(request->tmpfile, sizeof(request->tmpfile),
373 "%s.temp", filename);
374
375 url = xmalloc(strlen(remote->url) + 64);
376 sprintf(url, "%sobjects/pack/pack-%s.pack",
377 remote->url, sha1_to_hex(target->sha1));
378
379 /* Make sure there isn't another open request for this pack */
380 while (check_request) {
381 if (check_request->state == RUN_FETCH_PACKED &&
382 !strcmp(check_request->url, url)) {
383 free(url);
384 release_request(request);
385 return;
386 }
387 check_request = check_request->next;
388 }
389
390 packfile = fopen(request->tmpfile, "a");
391 if (!packfile) {
392 fprintf(stderr, "Unable to open local file %s for pack",
393 filename);
394 remote->can_update_info_refs = 0;
395 free(url);
396 return;
397 }
398
399 slot = get_active_slot();
400 slot->callback_func = process_response;
401 slot->callback_data = request;
402 request->slot = slot;
403 request->local_stream = packfile;
404 request->userData = target;
405
406 request->url = url;
407 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
408 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
409 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
410 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
411 slot->local = packfile;
412
413 /* If there is data present from a previous transfer attempt,
414 resume where it left off */
415 prev_posn = ftell(packfile);
416 if (prev_posn>0) {
417 if (push_verbosely)
418 fprintf(stderr,
419 "Resuming fetch of pack %s at byte %ld\n",
420 sha1_to_hex(target->sha1), prev_posn);
421 sprintf(range, "Range: bytes=%ld-", prev_posn);
422 range_header = curl_slist_append(range_header, range);
423 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
424 }
425
426 /* Try to get the request started, abort the request on error */
427 request->state = RUN_FETCH_PACKED;
428 if (!start_active_slot(slot)) {
429 fprintf(stderr, "Unable to start GET request\n");
430 remote->can_update_info_refs = 0;
431 release_request(request);
432 }
433 }
434
435 static void start_mkcol(struct transfer_request *request)
436 {
437 char *hex = sha1_to_hex(request->obj->sha1);
438 struct active_request_slot *slot;
439 char *posn;
440
441 request->url = xmalloc(strlen(remote->url) + 13);
442 strcpy(request->url, remote->url);
443 posn = request->url + strlen(remote->url);
444 strcpy(posn, "objects/");
445 posn += 8;
446 memcpy(posn, hex, 2);
447 posn += 2;
448 strcpy(posn, "/");
449
450 slot = get_active_slot();
451 slot->callback_func = process_response;
452 slot->callback_data = request;
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
454 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
455 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
456 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
457 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
458
459 if (start_active_slot(slot)) {
460 request->slot = slot;
461 request->state = RUN_MKCOL;
462 } else {
463 request->state = ABORTED;
464 free(request->url);
465 request->url = NULL;
466 }
467 }
468
469 static void start_put(struct transfer_request *request)
470 {
471 char *hex = sha1_to_hex(request->obj->sha1);
472 struct active_request_slot *slot;
473 char *posn;
474 char type[20];
475 char hdr[50];
476 void *unpacked;
477 unsigned long len;
478 int hdrlen;
479 ssize_t size;
480 z_stream stream;
481
482 unpacked = read_sha1_file(request->obj->sha1, type, &len);
483 hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
484
485 /* Set it up */
486 memset(&stream, 0, sizeof(stream));
487 deflateInit(&stream, Z_BEST_COMPRESSION);
488 size = deflateBound(&stream, len + hdrlen);
489 request->buffer.buffer = xmalloc(size);
490
491 /* Compress it */
492 stream.next_out = request->buffer.buffer;
493 stream.avail_out = size;
494
495 /* First header.. */
496 stream.next_in = (void *)hdr;
497 stream.avail_in = hdrlen;
498 while (deflate(&stream, 0) == Z_OK)
499 /* nothing */;
500
501 /* Then the data itself.. */
502 stream.next_in = unpacked;
503 stream.avail_in = len;
504 while (deflate(&stream, Z_FINISH) == Z_OK)
505 /* nothing */;
506 deflateEnd(&stream);
507 free(unpacked);
508
509 request->buffer.size = stream.total_out;
510 request->buffer.posn = 0;
511
512 request->url = xmalloc(strlen(remote->url) +
513 strlen(request->lock->token) + 51);
514 strcpy(request->url, remote->url);
515 posn = request->url + strlen(remote->url);
516 strcpy(posn, "objects/");
517 posn += 8;
518 memcpy(posn, hex, 2);
519 posn += 2;
520 *(posn++) = '/';
521 strcpy(posn, hex + 2);
522 request->dest = xmalloc(strlen(request->url) + 14);
523 sprintf(request->dest, "Destination: %s", request->url);
524 posn += 38;
525 *(posn++) = '.';
526 strcpy(posn, request->lock->token);
527
528 slot = get_active_slot();
529 slot->callback_func = process_response;
530 slot->callback_data = request;
531 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
532 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
533 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
534 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
535 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
536 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
537 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
538 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
539 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
540
541 if (start_active_slot(slot)) {
542 request->slot = slot;
543 request->state = RUN_PUT;
544 } else {
545 request->state = ABORTED;
546 free(request->url);
547 request->url = NULL;
548 }
549 }
550
551 static void start_move(struct transfer_request *request)
552 {
553 struct active_request_slot *slot;
554 struct curl_slist *dav_headers = NULL;
555
556 slot = get_active_slot();
557 slot->callback_func = process_response;
558 slot->callback_data = request;
559 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
560 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
561 dav_headers = curl_slist_append(dav_headers, request->dest);
562 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
563 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
564 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
565 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
566
567 if (start_active_slot(slot)) {
568 request->slot = slot;
569 request->state = RUN_MOVE;
570 } else {
571 request->state = ABORTED;
572 free(request->url);
573 request->url = NULL;
574 }
575 }
576
577 static int refresh_lock(struct remote_lock *lock)
578 {
579 struct active_request_slot *slot;
580 struct slot_results results;
581 char *if_header;
582 char timeout_header[25];
583 struct curl_slist *dav_headers = NULL;
584 int rc = 0;
585
586 lock->refreshing = 1;
587
588 if_header = xmalloc(strlen(lock->token) + 25);
589 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
590 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
591 dav_headers = curl_slist_append(dav_headers, if_header);
592 dav_headers = curl_slist_append(dav_headers, timeout_header);
593
594 slot = get_active_slot();
595 slot->results = &results;
596 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
597 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
598 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
599 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
600 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
601
602 if (start_active_slot(slot)) {
603 run_active_slot(slot);
604 if (results.curl_result != CURLE_OK) {
605 fprintf(stderr, "LOCK HTTP error %ld\n",
606 results.http_code);
607 } else {
608 lock->start_time = time(NULL);
609 rc = 1;
610 }
611 }
612
613 lock->refreshing = 0;
614 curl_slist_free_all(dav_headers);
615 free(if_header);
616
617 return rc;
618 }
619
620 static void check_locks()
621 {
622 struct remote_lock *lock = remote->locks;
623 time_t current_time = time(NULL);
624 int time_remaining;
625
626 while (lock) {
627 time_remaining = lock->start_time + lock->timeout -
628 current_time;
629 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
630 if (!refresh_lock(lock)) {
631 fprintf(stderr,
632 "Unable to refresh lock for %s\n",
633 lock->url);
634 aborted = 1;
635 return;
636 }
637 }
638 lock = lock->next;
639 }
640 }
641
642 static void release_request(struct transfer_request *request)
643 {
644 struct transfer_request *entry = request_queue_head;
645
646 if (request == request_queue_head) {
647 request_queue_head = request->next;
648 } else {
649 while (entry->next != NULL && entry->next != request)
650 entry = entry->next;
651 if (entry->next == request)
652 entry->next = entry->next->next;
653 }
654
655 if (request->local_fileno != -1)
656 close(request->local_fileno);
657 if (request->local_stream)
658 fclose(request->local_stream);
659 if (request->url != NULL)
660 free(request->url);
661 free(request);
662 }
663
664 static void finish_request(struct transfer_request *request)
665 {
666 struct stat st;
667 struct packed_git *target;
668 struct packed_git **lst;
669
670 request->curl_result = request->slot->curl_result;
671 request->http_code = request->slot->http_code;
672 request->slot = NULL;
673
674 /* Keep locks active */
675 check_locks();
676
677 if (request->headers != NULL)
678 curl_slist_free_all(request->headers);
679
680 /* URL is reused for MOVE after PUT */
681 if (request->state != RUN_PUT) {
682 free(request->url);
683 request->url = NULL;
684 }
685
686 if (request->state == RUN_MKCOL) {
687 if (request->curl_result == CURLE_OK ||
688 request->http_code == 405) {
689 remote_dir_exists[request->obj->sha1[0]] = 1;
690 start_put(request);
691 } else {
692 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
693 sha1_to_hex(request->obj->sha1),
694 request->curl_result, request->http_code);
695 request->state = ABORTED;
696 aborted = 1;
697 }
698 } else if (request->state == RUN_PUT) {
699 if (request->curl_result == CURLE_OK) {
700 start_move(request);
701 } else {
702 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
703 sha1_to_hex(request->obj->sha1),
704 request->curl_result, request->http_code);
705 request->state = ABORTED;
706 aborted = 1;
707 }
708 } else if (request->state == RUN_MOVE) {
709 if (request->curl_result == CURLE_OK) {
710 if (push_verbosely)
711 fprintf(stderr, " sent %s\n",
712 sha1_to_hex(request->obj->sha1));
713 request->obj->flags |= REMOTE;
714 release_request(request);
715 } else {
716 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
717 sha1_to_hex(request->obj->sha1),
718 request->curl_result, request->http_code);
719 request->state = ABORTED;
720 aborted = 1;
721 }
722 } else if (request->state == RUN_FETCH_LOOSE) {
723 fchmod(request->local_fileno, 0444);
724 close(request->local_fileno); request->local_fileno = -1;
725
726 if (request->curl_result != CURLE_OK &&
727 request->http_code != 416) {
728 if (stat(request->tmpfile, &st) == 0) {
729 if (st.st_size == 0)
730 unlink(request->tmpfile);
731 }
732 } else {
733 if (request->http_code == 416)
734 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
735
736 inflateEnd(&request->stream);
737 SHA1_Final(request->real_sha1, &request->c);
738 if (request->zret != Z_STREAM_END) {
739 unlink(request->tmpfile);
740 } else if (memcmp(request->obj->sha1, request->real_sha1, 20)) {
741 unlink(request->tmpfile);
742 } else {
743 request->rename =
744 move_temp_to_file(
745 request->tmpfile,
746 request->filename);
747 if (request->rename == 0) {
748 request->obj->flags |= (LOCAL | REMOTE);
749 }
750 }
751 }
752
753 /* Try fetching packed if necessary */
754 if (request->obj->flags & LOCAL)
755 release_request(request);
756 else
757 start_fetch_packed(request);
758
759 } else if (request->state == RUN_FETCH_PACKED) {
760 if (request->curl_result != CURLE_OK) {
761 fprintf(stderr, "Unable to get pack file %s\n%s",
762 request->url, curl_errorstr);
763 remote->can_update_info_refs = 0;
764 } else {
765 fclose(request->local_stream);
766 request->local_stream = NULL;
767 if (!move_temp_to_file(request->tmpfile,
768 request->filename)) {
769 target = (struct packed_git *)request->userData;
770 lst = &remote->packs;
771 while (*lst != target)
772 lst = &((*lst)->next);
773 *lst = (*lst)->next;
774
775 if (!verify_pack(target, 0))
776 install_packed_git(target);
777 else
778 remote->can_update_info_refs = 0;
779 }
780 }
781 release_request(request);
782 }
783 }
784
785 void fill_active_slots(void)
786 {
787 struct transfer_request *request = request_queue_head;
788 struct transfer_request *next;
789 struct active_request_slot *slot = active_queue_head;
790 int num_transfers;
791
792 if (aborted)
793 return;
794
795 while (active_requests < max_requests && request != NULL) {
796 next = request->next;
797 if (request->state == NEED_FETCH) {
798 start_fetch_loose(request);
799 } else if (pushing && request->state == NEED_PUSH) {
800 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
801 start_put(request);
802 } else {
803 start_mkcol(request);
804 }
805 curl_multi_perform(curlm, &num_transfers);
806 }
807 request = next;
808 }
809
810 while (slot != NULL) {
811 if (!slot->in_use && slot->curl != NULL) {
812 curl_easy_cleanup(slot->curl);
813 slot->curl = NULL;
814 }
815 slot = slot->next;
816 }
817 }
818
819 static void get_remote_object_list(unsigned char parent);
820
821 static void add_fetch_request(struct object *obj)
822 {
823 struct transfer_request *request;
824
825 check_locks();
826
827 /*
828 * Don't fetch the object if it's known to exist locally
829 * or is already in the request queue
830 */
831 if (remote_dir_exists[obj->sha1[0]] == -1)
832 get_remote_object_list(obj->sha1[0]);
833 if (obj->flags & (LOCAL | FETCHING))
834 return;
835
836 obj->flags |= FETCHING;
837 request = xmalloc(sizeof(*request));
838 request->obj = obj;
839 request->url = NULL;
840 request->lock = NULL;
841 request->headers = NULL;
842 request->local_fileno = -1;
843 request->local_stream = NULL;
844 request->state = NEED_FETCH;
845 request->next = request_queue_head;
846 request_queue_head = request;
847
848 fill_active_slots();
849 step_active_slots();
850 }
851
852 static int add_send_request(struct object *obj, struct remote_lock *lock)
853 {
854 struct transfer_request *request = request_queue_head;
855 struct packed_git *target;
856
857 /* Keep locks active */
858 check_locks();
859
860 /*
861 * Don't push the object if it's known to exist on the remote
862 * or is already in the request queue
863 */
864 if (remote_dir_exists[obj->sha1[0]] == -1)
865 get_remote_object_list(obj->sha1[0]);
866 if (obj->flags & (REMOTE | PUSHING))
867 return 0;
868 target = find_sha1_pack(obj->sha1, remote->packs);
869 if (target) {
870 obj->flags |= REMOTE;
871 return 0;
872 }
873
874 obj->flags |= PUSHING;
875 request = xmalloc(sizeof(*request));
876 request->obj = obj;
877 request->url = NULL;
878 request->lock = lock;
879 request->headers = NULL;
880 request->local_fileno = -1;
881 request->local_stream = NULL;
882 request->state = NEED_PUSH;
883 request->next = request_queue_head;
884 request_queue_head = request;
885
886 fill_active_slots();
887 step_active_slots();
888
889 return 1;
890 }
891
892 static int fetch_index(unsigned char *sha1)
893 {
894 char *hex = sha1_to_hex(sha1);
895 char *filename;
896 char *url;
897 char tmpfile[PATH_MAX];
898 long prev_posn = 0;
899 char range[RANGE_HEADER_SIZE];
900 struct curl_slist *range_header = NULL;
901
902 FILE *indexfile;
903 struct active_request_slot *slot;
904 struct slot_results results;
905
906 /* Don't use the index if the pack isn't there */
907 url = xmalloc(strlen(remote->url) + 64);
908 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
909 slot = get_active_slot();
910 slot->results = &results;
911 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
912 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
913 if (start_active_slot(slot)) {
914 run_active_slot(slot);
915 if (results.curl_result != CURLE_OK) {
916 free(url);
917 return error("Unable to verify pack %s is available",
918 hex);
919 }
920 } else {
921 return error("Unable to start request");
922 }
923
924 if (has_pack_index(sha1))
925 return 0;
926
927 if (push_verbosely)
928 fprintf(stderr, "Getting index for pack %s\n", hex);
929
930 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
931
932 filename = sha1_pack_index_name(sha1);
933 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
934 indexfile = fopen(tmpfile, "a");
935 if (!indexfile)
936 return error("Unable to open local file %s for pack index",
937 filename);
938
939 slot = get_active_slot();
940 slot->results = &results;
941 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
942 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
943 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
944 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
945 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
946 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
947 slot->local = indexfile;
948
949 /* If there is data present from a previous transfer attempt,
950 resume where it left off */
951 prev_posn = ftell(indexfile);
952 if (prev_posn>0) {
953 if (push_verbosely)
954 fprintf(stderr,
955 "Resuming fetch of index for pack %s at byte %ld\n",
956 hex, prev_posn);
957 sprintf(range, "Range: bytes=%ld-", prev_posn);
958 range_header = curl_slist_append(range_header, range);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
960 }
961
962 if (start_active_slot(slot)) {
963 run_active_slot(slot);
964 if (results.curl_result != CURLE_OK) {
965 free(url);
966 fclose(indexfile);
967 return error("Unable to get pack index %s\n%s", url,
968 curl_errorstr);
969 }
970 } else {
971 free(url);
972 fclose(indexfile);
973 return error("Unable to start request");
974 }
975
976 free(url);
977 fclose(indexfile);
978
979 return move_temp_to_file(tmpfile, filename);
980 }
981
982 static int setup_index(unsigned char *sha1)
983 {
984 struct packed_git *new_pack;
985
986 if (fetch_index(sha1))
987 return -1;
988
989 new_pack = parse_pack_index(sha1);
990 new_pack->next = remote->packs;
991 remote->packs = new_pack;
992 return 0;
993 }
994
995 static int fetch_indices(void)
996 {
997 unsigned char sha1[20];
998 char *url;
999 struct buffer buffer;
1000 char *data;
1001 int i = 0;
1002
1003 struct active_request_slot *slot;
1004 struct slot_results results;
1005
1006 data = xmalloc(4096);
1007 memset(data, 0, 4096);
1008 buffer.size = 4096;
1009 buffer.posn = 0;
1010 buffer.buffer = data;
1011
1012 if (push_verbosely)
1013 fprintf(stderr, "Getting pack list\n");
1014
1015 url = xmalloc(strlen(remote->url) + 20);
1016 sprintf(url, "%sobjects/info/packs", remote->url);
1017
1018 slot = get_active_slot();
1019 slot->results = &results;
1020 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1021 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1022 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1023 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1024 if (start_active_slot(slot)) {
1025 run_active_slot(slot);
1026 if (results.curl_result != CURLE_OK) {
1027 free(buffer.buffer);
1028 free(url);
1029 if (results.http_code == 404)
1030 return 0;
1031 else
1032 return error("%s", curl_errorstr);
1033 }
1034 } else {
1035 free(buffer.buffer);
1036 free(url);
1037 return error("Unable to start request");
1038 }
1039 free(url);
1040
1041 data = buffer.buffer;
1042 while (i < buffer.posn) {
1043 switch (data[i]) {
1044 case 'P':
1045 i++;
1046 if (i + 52 < buffer.posn &&
1047 !strncmp(data + i, " pack-", 6) &&
1048 !strncmp(data + i + 46, ".pack\n", 6)) {
1049 get_sha1_hex(data + i + 6, sha1);
1050 setup_index(sha1);
1051 i += 51;
1052 break;
1053 }
1054 default:
1055 while (data[i] != '\n')
1056 i++;
1057 }
1058 i++;
1059 }
1060
1061 free(buffer.buffer);
1062 return 0;
1063 }
1064
1065 static inline int needs_quote(int ch)
1066 {
1067 switch (ch) {
1068 case '/': case '-': case '.':
1069 case 'A'...'Z': case 'a'...'z': case '0'...'9':
1070 return 0;
1071 default:
1072 return 1;
1073 }
1074 }
1075
1076 static inline int hex(int v)
1077 {
1078 if (v < 10) return '0' + v;
1079 else return 'A' + v - 10;
1080 }
1081
1082 static char *quote_ref_url(const char *base, const char *ref)
1083 {
1084 const char *cp;
1085 char *dp, *qref;
1086 int len, baselen, ch;
1087
1088 baselen = strlen(base);
1089 len = baselen + 1;
1090 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1091 if (needs_quote(ch))
1092 len += 2; /* extra two hex plus replacement % */
1093 qref = xmalloc(len);
1094 memcpy(qref, base, baselen);
1095 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1096 if (needs_quote(ch)) {
1097 *dp++ = '%';
1098 *dp++ = hex((ch >> 4) & 0xF);
1099 *dp++ = hex(ch & 0xF);
1100 }
1101 else
1102 *dp++ = ch;
1103 }
1104 *dp = 0;
1105
1106 return qref;
1107 }
1108
1109 int fetch_ref(char *ref, unsigned char *sha1)
1110 {
1111 char *url;
1112 char hex[42];
1113 struct buffer buffer;
1114 char *base = remote->url;
1115 struct active_request_slot *slot;
1116 struct slot_results results;
1117 buffer.size = 41;
1118 buffer.posn = 0;
1119 buffer.buffer = hex;
1120 hex[41] = '\0';
1121
1122 url = quote_ref_url(base, ref);
1123 slot = get_active_slot();
1124 slot->results = &results;
1125 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1126 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1127 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1128 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1129 if (start_active_slot(slot)) {
1130 run_active_slot(slot);
1131 if (results.curl_result != CURLE_OK)
1132 return error("Couldn't get %s for %s\n%s",
1133 url, ref, curl_errorstr);
1134 } else {
1135 return error("Unable to start request");
1136 }
1137
1138 hex[40] = '\0';
1139 get_sha1_hex(hex, sha1);
1140 return 0;
1141 }
1142
1143 static void one_remote_object(const char *hex)
1144 {
1145 unsigned char sha1[20];
1146 struct object *obj;
1147
1148 if (get_sha1_hex(hex, sha1) != 0)
1149 return;
1150
1151 obj = lookup_object(sha1);
1152 if (!obj)
1153 obj = parse_object(sha1);
1154
1155 /* Ignore remote objects that don't exist locally */
1156 if (!obj)
1157 return;
1158
1159 obj->flags |= REMOTE;
1160 if (!object_list_contains(objects, obj))
1161 add_object(obj, &objects, NULL, "");
1162 }
1163
1164 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1165 {
1166 int *lock_flags = (int *)ctx->userData;
1167
1168 if (tag_closed) {
1169 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1170 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1171 (*lock_flags & DAV_PROP_LOCKWR)) {
1172 *lock_flags |= DAV_LOCK_OK;
1173 }
1174 *lock_flags &= DAV_LOCK_OK;
1175 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1176 *lock_flags |= DAV_PROP_LOCKWR;
1177 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1178 *lock_flags |= DAV_PROP_LOCKEX;
1179 }
1180 }
1181 }
1182
1183 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1184 {
1185 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1186
1187 if (tag_closed && ctx->cdata) {
1188 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1189 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1190 strcpy(lock->owner, ctx->cdata);
1191 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1192 if (!strncmp(ctx->cdata, "Second-", 7))
1193 lock->timeout =
1194 strtol(ctx->cdata + 7, NULL, 10);
1195 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1196 if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
1197 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1198 strcpy(lock->token, ctx->cdata + 16);
1199 }
1200 }
1201 }
1202 }
1203
1204 static void one_remote_ref(char *refname);
1205
1206 static void
1207 xml_start_tag(void *userData, const char *name, const char **atts)
1208 {
1209 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1210 const char *c = index(name, ':');
1211 int new_len;
1212
1213 if (c == NULL)
1214 c = name;
1215 else
1216 c++;
1217
1218 new_len = strlen(ctx->name) + strlen(c) + 2;
1219
1220 if (new_len > ctx->len) {
1221 ctx->name = xrealloc(ctx->name, new_len);
1222 ctx->len = new_len;
1223 }
1224 strcat(ctx->name, ".");
1225 strcat(ctx->name, c);
1226
1227 if (ctx->cdata) {
1228 free(ctx->cdata);
1229 ctx->cdata = NULL;
1230 }
1231
1232 ctx->userFunc(ctx, 0);
1233 }
1234
1235 static void
1236 xml_end_tag(void *userData, const char *name)
1237 {
1238 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1239 const char *c = index(name, ':');
1240 char *ep;
1241
1242 ctx->userFunc(ctx, 1);
1243
1244 if (c == NULL)
1245 c = name;
1246 else
1247 c++;
1248
1249 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1250 *ep = 0;
1251 }
1252
1253 static void
1254 xml_cdata(void *userData, const XML_Char *s, int len)
1255 {
1256 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1257 if (ctx->cdata)
1258 free(ctx->cdata);
1259 ctx->cdata = xcalloc(len+1, 1);
1260 strncpy(ctx->cdata, s, len);
1261 }
1262
1263 static struct remote_lock *lock_remote(char *path, long timeout)
1264 {
1265 struct active_request_slot *slot;
1266 struct slot_results results;
1267 struct buffer out_buffer;
1268 struct buffer in_buffer;
1269 char *out_data;
1270 char *in_data;
1271 char *url;
1272 char *ep;
1273 char timeout_header[25];
1274 struct remote_lock *lock = NULL;
1275 XML_Parser parser = XML_ParserCreate(NULL);
1276 enum XML_Status result;
1277 struct curl_slist *dav_headers = NULL;
1278 struct xml_ctx ctx;
1279
1280 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1281 sprintf(url, "%s%s", remote->url, path);
1282
1283 /* Make sure leading directories exist for the remote ref */
1284 ep = strchr(url + strlen(remote->url) + 11, '/');
1285 while (ep) {
1286 *ep = 0;
1287 slot = get_active_slot();
1288 slot->results = &results;
1289 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1290 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1291 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1292 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1293 if (start_active_slot(slot)) {
1294 run_active_slot(slot);
1295 if (results.curl_result != CURLE_OK &&
1296 results.http_code != 405) {
1297 fprintf(stderr,
1298 "Unable to create branch path %s\n",
1299 url);
1300 free(url);
1301 return NULL;
1302 }
1303 } else {
1304 fprintf(stderr, "Unable to start MKCOL request\n");
1305 free(url);
1306 return NULL;
1307 }
1308 *ep = '/';
1309 ep = strchr(ep + 1, '/');
1310 }
1311
1312 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1313 out_data = xmalloc(out_buffer.size + 1);
1314 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1315 out_buffer.posn = 0;
1316 out_buffer.buffer = out_data;
1317
1318 in_buffer.size = 4096;
1319 in_data = xmalloc(in_buffer.size);
1320 in_buffer.posn = 0;
1321 in_buffer.buffer = in_data;
1322
1323 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1324 dav_headers = curl_slist_append(dav_headers, timeout_header);
1325 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1326
1327 slot = get_active_slot();
1328 slot->results = &results;
1329 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1330 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1331 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1332 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1333 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1334 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1335 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1336 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1337 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1338
1339 lock = xcalloc(1, sizeof(*lock));
1340 lock->timeout = -1;
1341
1342 if (start_active_slot(slot)) {
1343 run_active_slot(slot);
1344 if (results.curl_result == CURLE_OK) {
1345 ctx.name = xcalloc(10, 1);
1346 ctx.len = 0;
1347 ctx.cdata = NULL;
1348 ctx.userFunc = handle_new_lock_ctx;
1349 ctx.userData = lock;
1350 XML_SetUserData(parser, &ctx);
1351 XML_SetElementHandler(parser, xml_start_tag,
1352 xml_end_tag);
1353 XML_SetCharacterDataHandler(parser, xml_cdata);
1354 result = XML_Parse(parser, in_buffer.buffer,
1355 in_buffer.posn, 1);
1356 free(ctx.name);
1357 if (result != XML_STATUS_OK) {
1358 fprintf(stderr, "XML error: %s\n",
1359 XML_ErrorString(
1360 XML_GetErrorCode(parser)));
1361 lock->timeout = -1;
1362 }
1363 }
1364 } else {
1365 fprintf(stderr, "Unable to start LOCK request\n");
1366 }
1367
1368 curl_slist_free_all(dav_headers);
1369 free(out_data);
1370 free(in_data);
1371
1372 if (lock->token == NULL || lock->timeout <= 0) {
1373 if (lock->token != NULL)
1374 free(lock->token);
1375 if (lock->owner != NULL)
1376 free(lock->owner);
1377 free(url);
1378 free(lock);
1379 lock = NULL;
1380 } else {
1381 lock->url = url;
1382 lock->start_time = time(NULL);
1383 lock->next = remote->locks;
1384 remote->locks = lock;
1385 }
1386
1387 return lock;
1388 }
1389
1390 static int unlock_remote(struct remote_lock *lock)
1391 {
1392 struct active_request_slot *slot;
1393 struct slot_results results;
1394 struct remote_lock *prev = remote->locks;
1395 char *lock_token_header;
1396 struct curl_slist *dav_headers = NULL;
1397 int rc = 0;
1398
1399 lock_token_header = xmalloc(strlen(lock->token) + 31);
1400 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1401 lock->token);
1402 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1403
1404 slot = get_active_slot();
1405 slot->results = &results;
1406 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1407 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1408 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1409 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1410
1411 if (start_active_slot(slot)) {
1412 run_active_slot(slot);
1413 if (results.curl_result == CURLE_OK)
1414 rc = 1;
1415 else
1416 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1417 results.http_code);
1418 } else {
1419 fprintf(stderr, "Unable to start UNLOCK request\n");
1420 }
1421
1422 curl_slist_free_all(dav_headers);
1423 free(lock_token_header);
1424
1425 if (remote->locks == lock) {
1426 remote->locks = lock->next;
1427 } else {
1428 while (prev && prev->next != lock)
1429 prev = prev->next;
1430 if (prev)
1431 prev->next = prev->next->next;
1432 }
1433
1434 if (lock->owner != NULL)
1435 free(lock->owner);
1436 free(lock->url);
1437 free(lock->token);
1438 free(lock);
1439
1440 return rc;
1441 }
1442
1443 static void remote_ls(const char *path, int flags,
1444 void (*userFunc)(struct remote_ls_ctx *ls),
1445 void *userData);
1446
1447 static void process_ls_object(struct remote_ls_ctx *ls)
1448 {
1449 unsigned int *parent = (unsigned int *)ls->userData;
1450 char *path = ls->dentry_name;
1451 char *obj_hex;
1452
1453 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1454 remote_dir_exists[*parent] = 1;
1455 return;
1456 }
1457
1458 if (strlen(path) != 49)
1459 return;
1460 path += 8;
1461 obj_hex = xmalloc(strlen(path));
1462 strncpy(obj_hex, path, 2);
1463 strcpy(obj_hex + 2, path + 3);
1464 one_remote_object(obj_hex);
1465 free(obj_hex);
1466 }
1467
1468 static void process_ls_ref(struct remote_ls_ctx *ls)
1469 {
1470 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1471 fprintf(stderr, " %s\n", ls->dentry_name);
1472 return;
1473 }
1474
1475 if (!(ls->dentry_flags & IS_DIR))
1476 one_remote_ref(ls->dentry_name);
1477 }
1478
1479 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1480 {
1481 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1482
1483 if (tag_closed) {
1484 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1485 if (ls->dentry_flags & IS_DIR) {
1486 if (ls->flags & PROCESS_DIRS) {
1487 ls->userFunc(ls);
1488 }
1489 if (strcmp(ls->dentry_name, ls->path) &&
1490 ls->flags & RECURSIVE) {
1491 remote_ls(ls->dentry_name,
1492 ls->flags,
1493 ls->userFunc,
1494 ls->userData);
1495 }
1496 } else if (ls->flags & PROCESS_FILES) {
1497 ls->userFunc(ls);
1498 }
1499 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1500 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1501 remote->path_len + 1);
1502 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1503 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1504 ls->dentry_flags |= IS_DIR;
1505 }
1506 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1507 if (ls->dentry_name) {
1508 free(ls->dentry_name);
1509 }
1510 ls->dentry_name = NULL;
1511 ls->dentry_flags = 0;
1512 }
1513 }
1514
1515 static void remote_ls(const char *path, int flags,
1516 void (*userFunc)(struct remote_ls_ctx *ls),
1517 void *userData)
1518 {
1519 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1520 struct active_request_slot *slot;
1521 struct slot_results results;
1522 struct buffer in_buffer;
1523 struct buffer out_buffer;
1524 char *in_data;
1525 char *out_data;
1526 XML_Parser parser = XML_ParserCreate(NULL);
1527 enum XML_Status result;
1528 struct curl_slist *dav_headers = NULL;
1529 struct xml_ctx ctx;
1530 struct remote_ls_ctx ls;
1531
1532 ls.flags = flags;
1533 ls.path = strdup(path);
1534 ls.dentry_name = NULL;
1535 ls.dentry_flags = 0;
1536 ls.userData = userData;
1537 ls.userFunc = userFunc;
1538
1539 sprintf(url, "%s%s", remote->url, path);
1540
1541 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1542 out_data = xmalloc(out_buffer.size + 1);
1543 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1544 out_buffer.posn = 0;
1545 out_buffer.buffer = out_data;
1546
1547 in_buffer.size = 4096;
1548 in_data = xmalloc(in_buffer.size);
1549 in_buffer.posn = 0;
1550 in_buffer.buffer = in_data;
1551
1552 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1553 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1554
1555 slot = get_active_slot();
1556 slot->results = &results;
1557 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1558 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1559 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1560 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1561 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1562 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1563 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1564 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1565 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1566
1567 if (start_active_slot(slot)) {
1568 run_active_slot(slot);
1569 if (results.curl_result == CURLE_OK) {
1570 ctx.name = xcalloc(10, 1);
1571 ctx.len = 0;
1572 ctx.cdata = NULL;
1573 ctx.userFunc = handle_remote_ls_ctx;
1574 ctx.userData = &ls;
1575 XML_SetUserData(parser, &ctx);
1576 XML_SetElementHandler(parser, xml_start_tag,
1577 xml_end_tag);
1578 XML_SetCharacterDataHandler(parser, xml_cdata);
1579 result = XML_Parse(parser, in_buffer.buffer,
1580 in_buffer.posn, 1);
1581 free(ctx.name);
1582
1583 if (result != XML_STATUS_OK) {
1584 fprintf(stderr, "XML error: %s\n",
1585 XML_ErrorString(
1586 XML_GetErrorCode(parser)));
1587 }
1588 }
1589 } else {
1590 fprintf(stderr, "Unable to start PROPFIND request\n");
1591 }
1592
1593 free(ls.path);
1594 free(url);
1595 free(out_data);
1596 free(in_buffer.buffer);
1597 curl_slist_free_all(dav_headers);
1598 }
1599
1600 static void get_remote_object_list(unsigned char parent)
1601 {
1602 char path[] = "objects/XX/";
1603 static const char hex[] = "0123456789abcdef";
1604 unsigned int val = parent;
1605
1606 path[8] = hex[val >> 4];
1607 path[9] = hex[val & 0xf];
1608 remote_dir_exists[val] = 0;
1609 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1610 process_ls_object, &val);
1611 }
1612
1613 static int locking_available(void)
1614 {
1615 struct active_request_slot *slot;
1616 struct slot_results results;
1617 struct buffer in_buffer;
1618 struct buffer out_buffer;
1619 char *in_data;
1620 char *out_data;
1621 XML_Parser parser = XML_ParserCreate(NULL);
1622 enum XML_Status result;
1623 struct curl_slist *dav_headers = NULL;
1624 struct xml_ctx ctx;
1625 int lock_flags = 0;
1626
1627 out_buffer.size =
1628 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1629 strlen(remote->url) - 2;
1630 out_data = xmalloc(out_buffer.size + 1);
1631 snprintf(out_data, out_buffer.size + 1,
1632 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1633 out_buffer.posn = 0;
1634 out_buffer.buffer = out_data;
1635
1636 in_buffer.size = 4096;
1637 in_data = xmalloc(in_buffer.size);
1638 in_buffer.posn = 0;
1639 in_buffer.buffer = in_data;
1640
1641 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1642 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1643
1644 slot = get_active_slot();
1645 slot->results = &results;
1646 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1647 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1648 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1649 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1650 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1651 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1652 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1653 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1654 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1655
1656 if (start_active_slot(slot)) {
1657 run_active_slot(slot);
1658 if (results.curl_result == CURLE_OK) {
1659 ctx.name = xcalloc(10, 1);
1660 ctx.len = 0;
1661 ctx.cdata = NULL;
1662 ctx.userFunc = handle_lockprop_ctx;
1663 ctx.userData = &lock_flags;
1664 XML_SetUserData(parser, &ctx);
1665 XML_SetElementHandler(parser, xml_start_tag,
1666 xml_end_tag);
1667 result = XML_Parse(parser, in_buffer.buffer,
1668 in_buffer.posn, 1);
1669 free(ctx.name);
1670
1671 if (result != XML_STATUS_OK) {
1672 fprintf(stderr, "XML error: %s\n",
1673 XML_ErrorString(
1674 XML_GetErrorCode(parser)));
1675 lock_flags = 0;
1676 }
1677 }
1678 } else {
1679 fprintf(stderr, "Unable to start PROPFIND request\n");
1680 }
1681
1682 free(out_data);
1683 free(in_buffer.buffer);
1684 curl_slist_free_all(dav_headers);
1685
1686 return lock_flags;
1687 }
1688
1689 static struct object_list **process_blob(struct blob *blob,
1690 struct object_list **p,
1691 struct name_path *path,
1692 const char *name)
1693 {
1694 struct object *obj = &blob->object;
1695
1696 obj->flags |= LOCAL;
1697
1698 if (obj->flags & (UNINTERESTING | SEEN))
1699 return p;
1700
1701 obj->flags |= SEEN;
1702 return add_object(obj, p, path, name);
1703 }
1704
1705 static struct object_list **process_tree(struct tree *tree,
1706 struct object_list **p,
1707 struct name_path *path,
1708 const char *name)
1709 {
1710 struct object *obj = &tree->object;
1711 struct tree_entry_list *entry;
1712 struct name_path me;
1713
1714 obj->flags |= LOCAL;
1715
1716 if (obj->flags & (UNINTERESTING | SEEN))
1717 return p;
1718 if (parse_tree(tree) < 0)
1719 die("bad tree object %s", sha1_to_hex(obj->sha1));
1720
1721 obj->flags |= SEEN;
1722 p = add_object(obj, p, NULL, name);
1723 me.up = path;
1724 me.elem = name;
1725 me.elem_len = strlen(name);
1726 entry = tree->entries;
1727 tree->entries = NULL;
1728 while (entry) {
1729 struct tree_entry_list *next = entry->next;
1730 if (entry->directory)
1731 p = process_tree(entry->item.tree, p, &me, entry->name);
1732 else
1733 p = process_blob(entry->item.blob, p, &me, entry->name);
1734 free(entry);
1735 entry = next;
1736 }
1737 return p;
1738 }
1739
1740 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1741 {
1742 struct commit *commit;
1743 struct object_list **p = &objects, *pending;
1744 int count = 0;
1745
1746 while ((commit = get_revision(revs)) != NULL) {
1747 p = process_tree(commit->tree, p, NULL, "");
1748 commit->object.flags |= LOCAL;
1749 if (!(commit->object.flags & UNINTERESTING))
1750 count += add_send_request(&commit->object, lock);
1751 }
1752
1753 for (pending = revs->pending_objects; pending; pending = pending->next) {
1754 struct object *obj = pending->item;
1755 const char *name = pending->name;
1756
1757 if (obj->flags & (UNINTERESTING | SEEN))
1758 continue;
1759 if (obj->type == tag_type) {
1760 obj->flags |= SEEN;
1761 p = add_object(obj, p, NULL, name);
1762 continue;
1763 }
1764 if (obj->type == tree_type) {
1765 p = process_tree((struct tree *)obj, p, NULL, name);
1766 continue;
1767 }
1768 if (obj->type == blob_type) {
1769 p = process_blob((struct blob *)obj, p, NULL, name);
1770 continue;
1771 }
1772 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1773 }
1774
1775 while (objects) {
1776 if (!(objects->item->flags & UNINTERESTING))
1777 count += add_send_request(objects->item, lock);
1778 objects = objects->next;
1779 }
1780
1781 return count;
1782 }
1783
1784 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1785 {
1786 struct active_request_slot *slot;
1787 struct slot_results results;
1788 char *out_data;
1789 char *if_header;
1790 struct buffer out_buffer;
1791 struct curl_slist *dav_headers = NULL;
1792 int i;
1793
1794 if_header = xmalloc(strlen(lock->token) + 25);
1795 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1796 dav_headers = curl_slist_append(dav_headers, if_header);
1797
1798 out_buffer.size = 41;
1799 out_data = xmalloc(out_buffer.size + 1);
1800 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1801 if (i != out_buffer.size) {
1802 fprintf(stderr, "Unable to initialize PUT request body\n");
1803 return 0;
1804 }
1805 out_buffer.posn = 0;
1806 out_buffer.buffer = out_data;
1807
1808 slot = get_active_slot();
1809 slot->results = &results;
1810 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1811 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1812 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1813 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1814 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1815 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1816 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1817 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1818 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1819
1820 if (start_active_slot(slot)) {
1821 run_active_slot(slot);
1822 free(out_data);
1823 free(if_header);
1824 if (results.curl_result != CURLE_OK) {
1825 fprintf(stderr,
1826 "PUT error: curl result=%d, HTTP code=%ld\n",
1827 results.curl_result, results.http_code);
1828 /* We should attempt recovery? */
1829 return 0;
1830 }
1831 } else {
1832 free(out_data);
1833 free(if_header);
1834 fprintf(stderr, "Unable to start PUT request\n");
1835 return 0;
1836 }
1837
1838 return 1;
1839 }
1840
1841 static struct ref *local_refs, **local_tail;
1842 static struct ref *remote_refs, **remote_tail;
1843
1844 static int one_local_ref(const char *refname, const unsigned char *sha1)
1845 {
1846 struct ref *ref;
1847 int len = strlen(refname) + 1;
1848 ref = xcalloc(1, sizeof(*ref) + len);
1849 memcpy(ref->new_sha1, sha1, 20);
1850 memcpy(ref->name, refname, len);
1851 *local_tail = ref;
1852 local_tail = &ref->next;
1853 return 0;
1854 }
1855
1856 static void one_remote_ref(char *refname)
1857 {
1858 struct ref *ref;
1859 unsigned char remote_sha1[20];
1860 struct object *obj;
1861
1862 if (fetch_ref(refname, remote_sha1) != 0) {
1863 fprintf(stderr,
1864 "Unable to fetch ref %s from %s\n",
1865 refname, remote->url);
1866 return;
1867 }
1868
1869 /*
1870 * Fetch a copy of the object if it doesn't exist locally - it
1871 * may be required for updating server info later.
1872 */
1873 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1874 obj = lookup_unknown_object(remote_sha1);
1875 if (obj) {
1876 fprintf(stderr, " fetch %s for %s\n",
1877 sha1_to_hex(remote_sha1), refname);
1878 add_fetch_request(obj);
1879 }
1880 }
1881
1882 int len = strlen(refname) + 1;
1883 ref = xcalloc(1, sizeof(*ref) + len);
1884 memcpy(ref->old_sha1, remote_sha1, 20);
1885 memcpy(ref->name, refname, len);
1886 *remote_tail = ref;
1887 remote_tail = &ref->next;
1888 }
1889
1890 static void get_local_heads(void)
1891 {
1892 local_tail = &local_refs;
1893 for_each_ref(one_local_ref);
1894 }
1895
1896 static void get_dav_remote_heads(void)
1897 {
1898 remote_tail = &remote_refs;
1899 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1900 }
1901
1902 static int is_zero_sha1(const unsigned char *sha1)
1903 {
1904 int i;
1905
1906 for (i = 0; i < 20; i++) {
1907 if (*sha1++)
1908 return 0;
1909 }
1910 return 1;
1911 }
1912
1913 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1914 {
1915 while (list) {
1916 struct commit_list *temp = list;
1917 temp->item->object.flags &= ~mark;
1918 list = temp->next;
1919 free(temp);
1920 }
1921 }
1922
1923 static int ref_newer(const unsigned char *new_sha1,
1924 const unsigned char *old_sha1)
1925 {
1926 struct object *o;
1927 struct commit *old, *new;
1928 struct commit_list *list, *used;
1929 int found = 0;
1930
1931 /* Both new and old must be commit-ish and new is descendant of
1932 * old. Otherwise we require --force.
1933 */
1934 o = deref_tag(parse_object(old_sha1), NULL, 0);
1935 if (!o || o->type != commit_type)
1936 return 0;
1937 old = (struct commit *) o;
1938
1939 o = deref_tag(parse_object(new_sha1), NULL, 0);
1940 if (!o || o->type != commit_type)
1941 return 0;
1942 new = (struct commit *) o;
1943
1944 if (parse_commit(new) < 0)
1945 return 0;
1946
1947 used = list = NULL;
1948 commit_list_insert(new, &list);
1949 while (list) {
1950 new = pop_most_recent_commit(&list, TMP_MARK);
1951 commit_list_insert(new, &used);
1952 if (new == old) {
1953 found = 1;
1954 break;
1955 }
1956 }
1957 unmark_and_free(list, TMP_MARK);
1958 unmark_and_free(used, TMP_MARK);
1959 return found;
1960 }
1961
1962 static void mark_edge_parents_uninteresting(struct commit *commit)
1963 {
1964 struct commit_list *parents;
1965
1966 for (parents = commit->parents; parents; parents = parents->next) {
1967 struct commit *parent = parents->item;
1968 if (!(parent->object.flags & UNINTERESTING))
1969 continue;
1970 mark_tree_uninteresting(parent->tree);
1971 }
1972 }
1973
1974 static void mark_edges_uninteresting(struct commit_list *list)
1975 {
1976 for ( ; list; list = list->next) {
1977 struct commit *commit = list->item;
1978
1979 if (commit->object.flags & UNINTERESTING) {
1980 mark_tree_uninteresting(commit->tree);
1981 continue;
1982 }
1983 mark_edge_parents_uninteresting(commit);
1984 }
1985 }
1986
1987 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1988 {
1989 struct buffer *buf = (struct buffer *)ls->userData;
1990 unsigned char remote_sha1[20];
1991 struct object *o;
1992 int len;
1993 char *ref_info;
1994
1995 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
1996 fprintf(stderr,
1997 "Unable to fetch ref %s from %s\n",
1998 ls->dentry_name, remote->url);
1999 aborted = 1;
2000 return;
2001 }
2002
2003 o = parse_object(remote_sha1);
2004 if (!o) {
2005 fprintf(stderr,
2006 "Unable to parse object %s for remote ref %s\n",
2007 sha1_to_hex(remote_sha1), ls->dentry_name);
2008 aborted = 1;
2009 return;
2010 }
2011
2012 len = strlen(ls->dentry_name) + 42;
2013 ref_info = xcalloc(len + 1, 1);
2014 sprintf(ref_info, "%s %s\n",
2015 sha1_to_hex(remote_sha1), ls->dentry_name);
2016 fwrite_buffer(ref_info, 1, len, buf);
2017 free(ref_info);
2018
2019 if (o->type == tag_type) {
2020 o = deref_tag(o, ls->dentry_name, 0);
2021 if (o) {
2022 len = strlen(ls->dentry_name) + 45;
2023 ref_info = xcalloc(len + 1, 1);
2024 sprintf(ref_info, "%s %s^{}\n",
2025 sha1_to_hex(o->sha1), ls->dentry_name);
2026 fwrite_buffer(ref_info, 1, len, buf);
2027 free(ref_info);
2028 }
2029 }
2030 }
2031
2032 static void update_remote_info_refs(struct remote_lock *lock)
2033 {
2034 struct buffer buffer;
2035 struct active_request_slot *slot;
2036 struct slot_results results;
2037 char *if_header;
2038 struct curl_slist *dav_headers = NULL;
2039
2040 buffer.buffer = xmalloc(4096);
2041 memset(buffer.buffer, 0, 4096);
2042 buffer.size = 4096;
2043 buffer.posn = 0;
2044 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2045 add_remote_info_ref, &buffer);
2046 if (!aborted) {
2047 if_header = xmalloc(strlen(lock->token) + 25);
2048 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2049 dav_headers = curl_slist_append(dav_headers, if_header);
2050
2051 slot = get_active_slot();
2052 slot->results = &results;
2053 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2054 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2055 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2056 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2057 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2058 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2059 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2060 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2061 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2062
2063 buffer.posn = 0;
2064
2065 if (start_active_slot(slot)) {
2066 run_active_slot(slot);
2067 if (results.curl_result != CURLE_OK) {
2068 fprintf(stderr,
2069 "PUT error: curl result=%d, HTTP code=%ld\n",
2070 results.curl_result, results.http_code);
2071 }
2072 }
2073 free(if_header);
2074 }
2075 free(buffer.buffer);
2076 }
2077
2078 static int remote_exists(const char *path)
2079 {
2080 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2081 struct active_request_slot *slot;
2082 struct slot_results results;
2083
2084 sprintf(url, "%s%s", remote->url, path);
2085
2086 slot = get_active_slot();
2087 slot->results = &results;
2088 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2089 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2090
2091 if (start_active_slot(slot)) {
2092 run_active_slot(slot);
2093 if (results.http_code == 404)
2094 return 0;
2095 else if (results.curl_result == CURLE_OK)
2096 return 1;
2097 else
2098 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2099 } else {
2100 fprintf(stderr, "Unable to start HEAD request\n");
2101 }
2102
2103 return -1;
2104 }
2105
2106 int main(int argc, char **argv)
2107 {
2108 struct transfer_request *request;
2109 struct transfer_request *next_request;
2110 int nr_refspec = 0;
2111 char **refspec = NULL;
2112 struct remote_lock *ref_lock = NULL;
2113 struct remote_lock *info_ref_lock = NULL;
2114 struct rev_info revs;
2115 int objects_to_send;
2116 int rc = 0;
2117 int i;
2118
2119 setup_git_directory();
2120 setup_ident();
2121
2122 remote = xcalloc(sizeof(*remote), 1);
2123
2124 argv++;
2125 for (i = 1; i < argc; i++, argv++) {
2126 char *arg = *argv;
2127
2128 if (*arg == '-') {
2129 if (!strcmp(arg, "--all")) {
2130 push_all = 1;
2131 continue;
2132 }
2133 if (!strcmp(arg, "--force")) {
2134 force_all = 1;
2135 continue;
2136 }
2137 if (!strcmp(arg, "--verbose")) {
2138 push_verbosely = 1;
2139 continue;
2140 }
2141 usage(http_push_usage);
2142 }
2143 if (!remote->url) {
2144 remote->url = arg;
2145 char *path = strstr(arg, "//");
2146 if (path) {
2147 path = index(path+2, '/');
2148 if (path)
2149 remote->path_len = strlen(path);
2150 }
2151 continue;
2152 }
2153 refspec = argv;
2154 nr_refspec = argc - i;
2155 break;
2156 }
2157
2158 if (!remote->url)
2159 usage(http_push_usage);
2160
2161 memset(remote_dir_exists, -1, 256);
2162
2163 http_init();
2164
2165 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2166 default_headers = curl_slist_append(default_headers, "Range:");
2167 default_headers = curl_slist_append(default_headers, "Destination:");
2168 default_headers = curl_slist_append(default_headers, "If:");
2169 default_headers = curl_slist_append(default_headers,
2170 "Pragma: no-cache");
2171
2172 /* Verify DAV compliance/lock support */
2173 if (!locking_available()) {
2174 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2175 rc = 1;
2176 goto cleanup;
2177 }
2178
2179 /* Check whether the remote has server info files */
2180 remote->can_update_info_refs = 0;
2181 remote->has_info_refs = remote_exists("info/refs");
2182 remote->has_info_packs = remote_exists("objects/info/packs");
2183 if (remote->has_info_refs) {
2184 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2185 if (info_ref_lock)
2186 remote->can_update_info_refs = 1;
2187 }
2188 if (remote->has_info_packs)
2189 fetch_indices();
2190
2191 /* Get a list of all local and remote heads to validate refspecs */
2192 get_local_heads();
2193 fprintf(stderr, "Fetching remote heads...\n");
2194 get_dav_remote_heads();
2195
2196 /* match them up */
2197 if (!remote_tail)
2198 remote_tail = &remote_refs;
2199 if (match_refs(local_refs, remote_refs, &remote_tail,
2200 nr_refspec, refspec, push_all))
2201 return -1;
2202 if (!remote_refs) {
2203 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2204 return 0;
2205 }
2206
2207 int new_refs = 0;
2208 struct ref *ref;
2209 for (ref = remote_refs; ref; ref = ref->next) {
2210 char old_hex[60], *new_hex;
2211 if (!ref->peer_ref)
2212 continue;
2213 if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
2214 if (push_verbosely || 1)
2215 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2216 continue;
2217 }
2218
2219 if (!force_all &&
2220 !is_zero_sha1(ref->old_sha1) &&
2221 !ref->force) {
2222 if (!has_sha1_file(ref->old_sha1) ||
2223 !ref_newer(ref->peer_ref->new_sha1,
2224 ref->old_sha1)) {
2225 /* We do not have the remote ref, or
2226 * we know that the remote ref is not
2227 * an ancestor of what we are trying to
2228 * push. Either way this can be losing
2229 * commits at the remote end and likely
2230 * we were not up to date to begin with.
2231 */
2232 error("remote '%s' is not a strict "
2233 "subset of local ref '%s'. "
2234 "maybe you are not up-to-date and "
2235 "need to pull first?",
2236 ref->name,
2237 ref->peer_ref->name);
2238 rc = -2;
2239 continue;
2240 }
2241 }
2242 memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
2243 if (is_zero_sha1(ref->new_sha1)) {
2244 error("cannot happen anymore");
2245 rc = -3;
2246 continue;
2247 }
2248 new_refs++;
2249 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2250 new_hex = sha1_to_hex(ref->new_sha1);
2251
2252 fprintf(stderr, "updating '%s'", ref->name);
2253 if (strcmp(ref->name, ref->peer_ref->name))
2254 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2255 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2256
2257
2258 /* Lock remote branch ref */
2259 ref_lock = lock_remote(ref->name, LOCK_TIME);
2260 if (ref_lock == NULL) {
2261 fprintf(stderr, "Unable to lock remote branch %s\n",
2262 ref->name);
2263 rc = 1;
2264 continue;
2265 }
2266
2267 /* Set up revision info for this refspec */
2268 const char *commit_argv[4];
2269 int commit_argc = 3;
2270 char *new_sha1_hex = strdup(sha1_to_hex(ref->new_sha1));
2271 char *old_sha1_hex = NULL;
2272 commit_argv[1] = "--objects";
2273 commit_argv[2] = new_sha1_hex;
2274 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2275 old_sha1_hex = xmalloc(42);
2276 sprintf(old_sha1_hex, "^%s",
2277 sha1_to_hex(ref->old_sha1));
2278 commit_argv[3] = old_sha1_hex;
2279 commit_argc++;
2280 }
2281 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2282 free(new_sha1_hex);
2283 if (old_sha1_hex) {
2284 free(old_sha1_hex);
2285 commit_argv[1] = NULL;
2286 }
2287
2288 /* Generate a list of objects that need to be pushed */
2289 pushing = 0;
2290 prepare_revision_walk(&revs);
2291 mark_edges_uninteresting(revs.commits);
2292 objects_to_send = get_delta(&revs, ref_lock);
2293 finish_all_active_slots();
2294
2295 /* Push missing objects to remote, this would be a
2296 convenient time to pack them first if appropriate. */
2297 pushing = 1;
2298 if (objects_to_send)
2299 fprintf(stderr, " sending %d objects\n",
2300 objects_to_send);
2301 fill_active_slots();
2302 finish_all_active_slots();
2303
2304 /* Update the remote branch if all went well */
2305 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2306 rc = 1;
2307 goto unlock;
2308 }
2309
2310 unlock:
2311 if (!rc)
2312 fprintf(stderr, " done\n");
2313 unlock_remote(ref_lock);
2314 check_locks();
2315 }
2316
2317 /* Update remote server info if appropriate */
2318 if (remote->has_info_refs && new_refs) {
2319 if (info_ref_lock && remote->can_update_info_refs) {
2320 fprintf(stderr, "Updating remote server info\n");
2321 update_remote_info_refs(info_ref_lock);
2322 } else {
2323 fprintf(stderr, "Unable to update server info\n");
2324 }
2325 }
2326 if (info_ref_lock)
2327 unlock_remote(info_ref_lock);
2328
2329 cleanup:
2330 free(remote);
2331
2332 curl_slist_free_all(no_pragma_header);
2333 curl_slist_free_all(default_headers);
2334
2335 http_cleanup();
2336
2337 request = request_queue_head;
2338 while (request != NULL) {
2339 next_request = request->next;
2340 release_request(request);
2341 request = next_request;
2342 }
2343
2344 return rc;
2345 }
Jonathan Nieder’s miscellaneous git branches