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Remove the default_headers variable from http-push.c
[git.git] / http-push.c
blob176bb29fab011500e882d6fd6a3ed467b853bb18
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78
79 static int push_verbosely;
80 static int push_all = MATCH_REFS_NONE;
81 static int force_all;
82 static int dry_run;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 request->tmpfile);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 request->buffer.buffer = xmalloc(size);
498
499 /* Compress it */
500 stream.next_out = request->buffer.buffer;
501 stream.avail_out = size;
502
503 /* First header.. */
504 stream.next_in = (void *)hdr;
505 stream.avail_in = hdrlen;
506 while (deflate(&stream, 0) == Z_OK)
507 /* nothing */;
508
509 /* Then the data itself.. */
510 stream.next_in = unpacked;
511 stream.avail_in = len;
512 while (deflate(&stream, Z_FINISH) == Z_OK)
513 /* nothing */;
514 deflateEnd(&stream);
515 free(unpacked);
516
517 request->buffer.size = stream.total_out;
518 request->buffer.posn = 0;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 if (request->url != NULL)
668 free(request->url);
669 free(request);
670 }
671
672 static void finish_request(struct transfer_request *request)
673 {
674 struct stat st;
675 struct packed_git *target;
676 struct packed_git **lst;
677
678 request->curl_result = request->slot->curl_result;
679 request->http_code = request->slot->http_code;
680 request->slot = NULL;
681
682 /* Keep locks active */
683 check_locks();
684
685 if (request->headers != NULL)
686 curl_slist_free_all(request->headers);
687
688 /* URL is reused for MOVE after PUT */
689 if (request->state != RUN_PUT) {
690 free(request->url);
691 request->url = NULL;
692 }
693
694 if (request->state == RUN_MKCOL) {
695 if (request->curl_result == CURLE_OK ||
696 request->http_code == 405) {
697 remote_dir_exists[request->obj->sha1[0]] = 1;
698 start_put(request);
699 } else {
700 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
701 sha1_to_hex(request->obj->sha1),
702 request->curl_result, request->http_code);
703 request->state = ABORTED;
704 aborted = 1;
705 }
706 } else if (request->state == RUN_PUT) {
707 if (request->curl_result == CURLE_OK) {
708 start_move(request);
709 } else {
710 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
711 sha1_to_hex(request->obj->sha1),
712 request->curl_result, request->http_code);
713 request->state = ABORTED;
714 aborted = 1;
715 }
716 } else if (request->state == RUN_MOVE) {
717 if (request->curl_result == CURLE_OK) {
718 if (push_verbosely)
719 fprintf(stderr, " sent %s\n",
720 sha1_to_hex(request->obj->sha1));
721 request->obj->flags |= REMOTE;
722 release_request(request);
723 } else {
724 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_FETCH_LOOSE) {
731 fchmod(request->local_fileno, 0444);
732 close(request->local_fileno); request->local_fileno = -1;
733
734 if (request->curl_result != CURLE_OK &&
735 request->http_code != 416) {
736 if (stat(request->tmpfile, &st) == 0) {
737 if (st.st_size == 0)
738 unlink(request->tmpfile);
739 }
740 } else {
741 if (request->http_code == 416)
742 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
743
744 inflateEnd(&request->stream);
745 SHA1_Final(request->real_sha1, &request->c);
746 if (request->zret != Z_STREAM_END) {
747 unlink(request->tmpfile);
748 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
749 unlink(request->tmpfile);
750 } else {
751 request->rename =
752 move_temp_to_file(
753 request->tmpfile,
754 request->filename);
755 if (request->rename == 0) {
756 request->obj->flags |= (LOCAL | REMOTE);
757 }
758 }
759 }
760
761 /* Try fetching packed if necessary */
762 if (request->obj->flags & LOCAL)
763 release_request(request);
764 else
765 start_fetch_packed(request);
766
767 } else if (request->state == RUN_FETCH_PACKED) {
768 if (request->curl_result != CURLE_OK) {
769 fprintf(stderr, "Unable to get pack file %s\n%s",
770 request->url, curl_errorstr);
771 remote->can_update_info_refs = 0;
772 } else {
773 off_t pack_size = ftell(request->local_stream);
774
775 fclose(request->local_stream);
776 request->local_stream = NULL;
777 if (!move_temp_to_file(request->tmpfile,
778 request->filename)) {
779 target = (struct packed_git *)request->userData;
780 target->pack_size = pack_size;
781 lst = &remote->packs;
782 while (*lst != target)
783 lst = &((*lst)->next);
784 *lst = (*lst)->next;
785
786 if (!verify_pack(target, 0))
787 install_packed_git(target);
788 else
789 remote->can_update_info_refs = 0;
790 }
791 }
792 release_request(request);
793 }
794 }
795
796 #ifdef USE_CURL_MULTI
797 static int fill_active_slot(void *unused)
798 {
799 struct transfer_request *request = request_queue_head;
800
801 if (aborted)
802 return 0;
803
804 for (request = request_queue_head; request; request = request->next) {
805 if (request->state == NEED_FETCH) {
806 start_fetch_loose(request);
807 return 1;
808 } else if (pushing && request->state == NEED_PUSH) {
809 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
810 start_put(request);
811 } else {
812 start_mkcol(request);
813 }
814 return 1;
815 }
816 }
817 return 0;
818 }
819 #endif
820
821 static void get_remote_object_list(unsigned char parent);
822
823 static void add_fetch_request(struct object *obj)
824 {
825 struct transfer_request *request;
826
827 check_locks();
828
829 /*
830 * Don't fetch the object if it's known to exist locally
831 * or is already in the request queue
832 */
833 if (remote_dir_exists[obj->sha1[0]] == -1)
834 get_remote_object_list(obj->sha1[0]);
835 if (obj->flags & (LOCAL | FETCHING))
836 return;
837
838 obj->flags |= FETCHING;
839 request = xmalloc(sizeof(*request));
840 request->obj = obj;
841 request->url = NULL;
842 request->lock = NULL;
843 request->headers = NULL;
844 request->local_fileno = -1;
845 request->local_stream = NULL;
846 request->state = NEED_FETCH;
847 request->next = request_queue_head;
848 request_queue_head = request;
849
850 #ifdef USE_CURL_MULTI
851 fill_active_slots();
852 step_active_slots();
853 #endif
854 }
855
856 static int add_send_request(struct object *obj, struct remote_lock *lock)
857 {
858 struct transfer_request *request = request_queue_head;
859 struct packed_git *target;
860
861 /* Keep locks active */
862 check_locks();
863
864 /*
865 * Don't push the object if it's known to exist on the remote
866 * or is already in the request queue
867 */
868 if (remote_dir_exists[obj->sha1[0]] == -1)
869 get_remote_object_list(obj->sha1[0]);
870 if (obj->flags & (REMOTE | PUSHING))
871 return 0;
872 target = find_sha1_pack(obj->sha1, remote->packs);
873 if (target) {
874 obj->flags |= REMOTE;
875 return 0;
876 }
877
878 obj->flags |= PUSHING;
879 request = xmalloc(sizeof(*request));
880 request->obj = obj;
881 request->url = NULL;
882 request->lock = lock;
883 request->headers = NULL;
884 request->local_fileno = -1;
885 request->local_stream = NULL;
886 request->state = NEED_PUSH;
887 request->next = request_queue_head;
888 request_queue_head = request;
889
890 #ifdef USE_CURL_MULTI
891 fill_active_slots();
892 step_active_slots();
893 #endif
894
895 return 1;
896 }
897
898 static int fetch_index(unsigned char *sha1)
899 {
900 char *hex = sha1_to_hex(sha1);
901 char *filename;
902 char *url;
903 char tmpfile[PATH_MAX];
904 long prev_posn = 0;
905 char range[RANGE_HEADER_SIZE];
906 struct curl_slist *range_header = NULL;
907
908 FILE *indexfile;
909 struct active_request_slot *slot;
910 struct slot_results results;
911
912 /* Don't use the index if the pack isn't there */
913 url = xmalloc(strlen(remote->url) + 64);
914 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
915 slot = get_active_slot();
916 slot->results = &results;
917 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
918 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
919 if (start_active_slot(slot)) {
920 run_active_slot(slot);
921 if (results.curl_result != CURLE_OK) {
922 free(url);
923 return error("Unable to verify pack %s is available",
924 hex);
925 }
926 } else {
927 free(url);
928 return error("Unable to start request");
929 }
930
931 if (has_pack_index(sha1)) {
932 free(url);
933 return 0;
934 }
935
936 if (push_verbosely)
937 fprintf(stderr, "Getting index for pack %s\n", hex);
938
939 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
940
941 filename = sha1_pack_index_name(sha1);
942 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
943 indexfile = fopen(tmpfile, "a");
944 if (!indexfile) {
945 free(url);
946 return error("Unable to open local file %s for pack index",
947 tmpfile);
948 }
949
950 slot = get_active_slot();
951 slot->results = &results;
952 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
953 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
954 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
955 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
956 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
957 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
958 slot->local = indexfile;
959
960 /* If there is data present from a previous transfer attempt,
961 resume where it left off */
962 prev_posn = ftell(indexfile);
963 if (prev_posn>0) {
964 if (push_verbosely)
965 fprintf(stderr,
966 "Resuming fetch of index for pack %s at byte %ld\n",
967 hex, prev_posn);
968 sprintf(range, "Range: bytes=%ld-", prev_posn);
969 range_header = curl_slist_append(range_header, range);
970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
971 }
972
973 if (start_active_slot(slot)) {
974 run_active_slot(slot);
975 if (results.curl_result != CURLE_OK) {
976 free(url);
977 fclose(indexfile);
978 return error("Unable to get pack index %s\n%s", url,
979 curl_errorstr);
980 }
981 } else {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to start request");
985 }
986
987 free(url);
988 fclose(indexfile);
989
990 return move_temp_to_file(tmpfile, filename);
991 }
992
993 static int setup_index(unsigned char *sha1)
994 {
995 struct packed_git *new_pack;
996
997 if (fetch_index(sha1))
998 return -1;
999
1000 new_pack = parse_pack_index(sha1);
1001 new_pack->next = remote->packs;
1002 remote->packs = new_pack;
1003 return 0;
1004 }
1005
1006 static int fetch_indices(void)
1007 {
1008 unsigned char sha1[20];
1009 char *url;
1010 struct buffer buffer;
1011 char *data;
1012 int i = 0;
1013
1014 struct active_request_slot *slot;
1015 struct slot_results results;
1016
1017 data = xcalloc(1, 4096);
1018 buffer.size = 4096;
1019 buffer.posn = 0;
1020 buffer.buffer = data;
1021
1022 if (push_verbosely)
1023 fprintf(stderr, "Getting pack list\n");
1024
1025 url = xmalloc(strlen(remote->url) + 20);
1026 sprintf(url, "%sobjects/info/packs", remote->url);
1027
1028 slot = get_active_slot();
1029 slot->results = &results;
1030 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1031 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1032 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1033 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1034 if (start_active_slot(slot)) {
1035 run_active_slot(slot);
1036 if (results.curl_result != CURLE_OK) {
1037 free(buffer.buffer);
1038 free(url);
1039 if (results.http_code == 404)
1040 return 0;
1041 else
1042 return error("%s", curl_errorstr);
1043 }
1044 } else {
1045 free(buffer.buffer);
1046 free(url);
1047 return error("Unable to start request");
1048 }
1049 free(url);
1050
1051 data = buffer.buffer;
1052 while (i < buffer.posn) {
1053 switch (data[i]) {
1054 case 'P':
1055 i++;
1056 if (i + 52 < buffer.posn &&
1057 !prefixcmp(data + i, " pack-") &&
1058 !prefixcmp(data + i + 46, ".pack\n")) {
1059 get_sha1_hex(data + i + 6, sha1);
1060 setup_index(sha1);
1061 i += 51;
1062 break;
1063 }
1064 default:
1065 while (data[i] != '\n')
1066 i++;
1067 }
1068 i++;
1069 }
1070
1071 free(buffer.buffer);
1072 return 0;
1073 }
1074
1075 static inline int needs_quote(int ch)
1076 {
1077 if (((ch >= 'A') && (ch <= 'Z'))
1078 || ((ch >= 'a') && (ch <= 'z'))
1079 || ((ch >= '0') && (ch <= '9'))
1080 || (ch == '/')
1081 || (ch == '-')
1082 || (ch == '.'))
1083 return 0;
1084 return 1;
1085 }
1086
1087 static inline int hex(int v)
1088 {
1089 if (v < 10) return '0' + v;
1090 else return 'A' + v - 10;
1091 }
1092
1093 static char *quote_ref_url(const char *base, const char *ref)
1094 {
1095 const char *cp;
1096 char *dp, *qref;
1097 int len, baselen, ch;
1098
1099 baselen = strlen(base);
1100 len = baselen + 1;
1101 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1102 if (needs_quote(ch))
1103 len += 2; /* extra two hex plus replacement % */
1104 qref = xmalloc(len);
1105 memcpy(qref, base, baselen);
1106 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1107 if (needs_quote(ch)) {
1108 *dp++ = '%';
1109 *dp++ = hex((ch >> 4) & 0xF);
1110 *dp++ = hex(ch & 0xF);
1111 }
1112 else
1113 *dp++ = ch;
1114 }
1115 *dp = 0;
1116
1117 return qref;
1118 }
1119
1120 int fetch_ref(char *ref, unsigned char *sha1)
1121 {
1122 char *url;
1123 char hex[42];
1124 struct buffer buffer;
1125 char *base = remote->url;
1126 struct active_request_slot *slot;
1127 struct slot_results results;
1128 buffer.size = 41;
1129 buffer.posn = 0;
1130 buffer.buffer = hex;
1131 hex[41] = '\0';
1132
1133 url = quote_ref_url(base, ref);
1134 slot = get_active_slot();
1135 slot->results = &results;
1136 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1137 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1138 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1139 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1140 if (start_active_slot(slot)) {
1141 run_active_slot(slot);
1142 free(url);
1143 if (results.curl_result != CURLE_OK)
1144 return error("Couldn't get %s for %s\n%s",
1145 url, ref, curl_errorstr);
1146 } else {
1147 free(url);
1148 return error("Unable to start request");
1149 }
1150
1151 if (buffer.posn != 41)
1152 return 1;
1153 hex[40] = '\0';
1154 return get_sha1_hex(hex, sha1);
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
2367 /* Verify DAV compliance/lock support */
2368 if (!locking_available()) {
2369 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2370 rc = 1;
2371 goto cleanup;
2372 }
2373
2374 /* Check whether the remote has server info files */
2375 remote->can_update_info_refs = 0;
2376 remote->has_info_refs = remote_exists("info/refs");
2377 remote->has_info_packs = remote_exists("objects/info/packs");
2378 if (remote->has_info_refs) {
2379 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2380 if (info_ref_lock)
2381 remote->can_update_info_refs = 1;
2382 }
2383 if (remote->has_info_packs)
2384 fetch_indices();
2385
2386 /* Get a list of all local and remote heads to validate refspecs */
2387 get_local_heads();
2388 fprintf(stderr, "Fetching remote heads...\n");
2389 get_dav_remote_heads();
2390
2391 /* Remove a remote branch if -d or -D was specified */
2392 if (delete_branch) {
2393 if (delete_remote_branch(refspec[0], force_delete) == -1)
2394 fprintf(stderr, "Unable to delete remote branch %s\n",
2395 refspec[0]);
2396 goto cleanup;
2397 }
2398
2399 /* match them up */
2400 if (!remote_tail)
2401 remote_tail = &remote_refs;
2402 if (match_refs(local_refs, remote_refs, &remote_tail,
2403 nr_refspec, (const char **) refspec, push_all))
2404 return -1;
2405 if (!remote_refs) {
2406 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2407 return 0;
2408 }
2409
2410 new_refs = 0;
2411 for (ref = remote_refs; ref; ref = ref->next) {
2412 char old_hex[60], *new_hex;
2413 const char *commit_argv[4];
2414 int commit_argc;
2415 char *new_sha1_hex, *old_sha1_hex;
2416
2417 if (!ref->peer_ref)
2418 continue;
2419 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2420 if (push_verbosely || 1)
2421 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2422 continue;
2423 }
2424
2425 if (!force_all &&
2426 !is_zero_sha1(ref->old_sha1) &&
2427 !ref->force) {
2428 if (!has_sha1_file(ref->old_sha1) ||
2429 !ref_newer(ref->peer_ref->new_sha1,
2430 ref->old_sha1)) {
2431 /*
2432 * We do not have the remote ref, or
2433 * we know that the remote ref is not
2434 * an ancestor of what we are trying to
2435 * push. Either way this can be losing
2436 * commits at the remote end and likely
2437 * we were not up to date to begin with.
2438 */
2439 error("remote '%s' is not an ancestor of\n"
2440 "local '%s'.\n"
2441 "Maybe you are not up-to-date and "
2442 "need to pull first?",
2443 ref->name,
2444 ref->peer_ref->name);
2445 rc = -2;
2446 continue;
2447 }
2448 }
2449 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2450 if (is_zero_sha1(ref->new_sha1)) {
2451 error("cannot happen anymore");
2452 rc = -3;
2453 continue;
2454 }
2455 new_refs++;
2456 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2457 new_hex = sha1_to_hex(ref->new_sha1);
2458
2459 fprintf(stderr, "updating '%s'", ref->name);
2460 if (strcmp(ref->name, ref->peer_ref->name))
2461 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2462 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2463 if (dry_run)
2464 continue;
2465
2466 /* Lock remote branch ref */
2467 ref_lock = lock_remote(ref->name, LOCK_TIME);
2468 if (ref_lock == NULL) {
2469 fprintf(stderr, "Unable to lock remote branch %s\n",
2470 ref->name);
2471 rc = 1;
2472 continue;
2473 }
2474
2475 /* Set up revision info for this refspec */
2476 commit_argc = 3;
2477 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2478 old_sha1_hex = NULL;
2479 commit_argv[1] = "--objects";
2480 commit_argv[2] = new_sha1_hex;
2481 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2482 old_sha1_hex = xmalloc(42);
2483 sprintf(old_sha1_hex, "^%s",
2484 sha1_to_hex(ref->old_sha1));
2485 commit_argv[3] = old_sha1_hex;
2486 commit_argc++;
2487 }
2488 init_revisions(&revs, setup_git_directory());
2489 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2490 free(new_sha1_hex);
2491 if (old_sha1_hex) {
2492 free(old_sha1_hex);
2493 commit_argv[1] = NULL;
2494 }
2495
2496 /* Generate a list of objects that need to be pushed */
2497 pushing = 0;
2498 prepare_revision_walk(&revs);
2499 mark_edges_uninteresting(revs.commits);
2500 objects_to_send = get_delta(&revs, ref_lock);
2501 finish_all_active_slots();
2502
2503 /* Push missing objects to remote, this would be a
2504 convenient time to pack them first if appropriate. */
2505 pushing = 1;
2506 if (objects_to_send)
2507 fprintf(stderr, " sending %d objects\n",
2508 objects_to_send);
2509 #ifdef USE_CURL_MULTI
2510 fill_active_slots();
2511 add_fill_function(NULL, fill_active_slot);
2512 #endif
2513 finish_all_active_slots();
2514
2515 /* Update the remote branch if all went well */
2516 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2517 rc = 1;
2518 goto unlock;
2519 }
2520
2521 unlock:
2522 if (!rc)
2523 fprintf(stderr, " done\n");
2524 unlock_remote(ref_lock);
2525 check_locks();
2526 }
2527
2528 /* Update remote server info if appropriate */
2529 if (remote->has_info_refs && new_refs) {
2530 if (info_ref_lock && remote->can_update_info_refs) {
2531 fprintf(stderr, "Updating remote server info\n");
2532 if (!dry_run)
2533 update_remote_info_refs(info_ref_lock);
2534 } else {
2535 fprintf(stderr, "Unable to update server info\n");
2536 }
2537 }
2538 if (info_ref_lock)
2539 unlock_remote(info_ref_lock);
2540
2541 cleanup:
2542 free(remote);
2543
2544 curl_slist_free_all(no_pragma_header);
2545
2546 http_cleanup();
2547
2548 request = request_queue_head;
2549 while (request != NULL) {
2550 next_request = request->next;
2551 release_request(request);
2552 request = next_request;
2553 }
2554
2555 return rc;
2556 }
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