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http-push: fail when info/refs exists and is already locked
[git/spearce.git] / http-push.c
blobe1984d3a0036d2852d13f2a4e0cfd0c61ea66c07
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78
79 static int push_verbosely;
80 static int push_all = MATCH_REFS_NONE;
81 static int force_all;
82 static int dry_run;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 request->tmpfile);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 strbuf_init(&request->buffer.buf, size);
498 request->buffer.posn = 0;
499
500 /* Compress it */
501 stream.next_out = (unsigned char *)request->buffer.buf.buf;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.buf.len = stream.total_out;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 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 strbuf buffer = STRBUF_INIT;
1011 char *data;
1012 int i = 0;
1013
1014 struct active_request_slot *slot;
1015 struct slot_results results;
1016
1017 if (push_verbosely)
1018 fprintf(stderr, "Getting pack list\n");
1019
1020 url = xmalloc(strlen(remote->url) + 20);
1021 sprintf(url, "%sobjects/info/packs", remote->url);
1022
1023 slot = get_active_slot();
1024 slot->results = &results;
1025 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1028 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1029 if (start_active_slot(slot)) {
1030 run_active_slot(slot);
1031 if (results.curl_result != CURLE_OK) {
1032 strbuf_release(&buffer);
1033 free(url);
1034 if (results.http_code == 404)
1035 return 0;
1036 else
1037 return error("%s", curl_errorstr);
1038 }
1039 } else {
1040 strbuf_release(&buffer);
1041 free(url);
1042 return error("Unable to start request");
1043 }
1044 free(url);
1045
1046 data = buffer.buf;
1047 while (i < buffer.len) {
1048 switch (data[i]) {
1049 case 'P':
1050 i++;
1051 if (i + 52 < buffer.len &&
1052 !prefixcmp(data + i, " pack-") &&
1053 !prefixcmp(data + i + 46, ".pack\n")) {
1054 get_sha1_hex(data + i + 6, sha1);
1055 setup_index(sha1);
1056 i += 51;
1057 break;
1058 }
1059 default:
1060 while (data[i] != '\n')
1061 i++;
1062 }
1063 i++;
1064 }
1065
1066 strbuf_release(&buffer);
1067 return 0;
1068 }
1069
1070 static void one_remote_object(const char *hex)
1071 {
1072 unsigned char sha1[20];
1073 struct object *obj;
1074
1075 if (get_sha1_hex(hex, sha1) != 0)
1076 return;
1077
1078 obj = lookup_object(sha1);
1079 if (!obj)
1080 obj = parse_object(sha1);
1081
1082 /* Ignore remote objects that don't exist locally */
1083 if (!obj)
1084 return;
1085
1086 obj->flags |= REMOTE;
1087 if (!object_list_contains(objects, obj))
1088 object_list_insert(obj, &objects);
1089 }
1090
1091 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1092 {
1093 int *lock_flags = (int *)ctx->userData;
1094
1095 if (tag_closed) {
1096 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1097 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1098 (*lock_flags & DAV_PROP_LOCKWR)) {
1099 *lock_flags |= DAV_LOCK_OK;
1100 }
1101 *lock_flags &= DAV_LOCK_OK;
1102 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1103 *lock_flags |= DAV_PROP_LOCKWR;
1104 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1105 *lock_flags |= DAV_PROP_LOCKEX;
1106 }
1107 }
1108 }
1109
1110 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1111 {
1112 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1113
1114 if (tag_closed && ctx->cdata) {
1115 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1116 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1117 strcpy(lock->owner, ctx->cdata);
1118 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1119 if (!prefixcmp(ctx->cdata, "Second-"))
1120 lock->timeout =
1121 strtol(ctx->cdata + 7, NULL, 10);
1122 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1123 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1124 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1125 strcpy(lock->token, ctx->cdata + 16);
1126 }
1127 }
1128 }
1129 }
1130
1131 static void one_remote_ref(char *refname);
1132
1133 static void
1134 xml_start_tag(void *userData, const char *name, const char **atts)
1135 {
1136 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1137 const char *c = strchr(name, ':');
1138 int new_len;
1139
1140 if (c == NULL)
1141 c = name;
1142 else
1143 c++;
1144
1145 new_len = strlen(ctx->name) + strlen(c) + 2;
1146
1147 if (new_len > ctx->len) {
1148 ctx->name = xrealloc(ctx->name, new_len);
1149 ctx->len = new_len;
1150 }
1151 strcat(ctx->name, ".");
1152 strcat(ctx->name, c);
1153
1154 free(ctx->cdata);
1155 ctx->cdata = NULL;
1156
1157 ctx->userFunc(ctx, 0);
1158 }
1159
1160 static void
1161 xml_end_tag(void *userData, const char *name)
1162 {
1163 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1164 const char *c = strchr(name, ':');
1165 char *ep;
1166
1167 ctx->userFunc(ctx, 1);
1168
1169 if (c == NULL)
1170 c = name;
1171 else
1172 c++;
1173
1174 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1175 *ep = 0;
1176 }
1177
1178 static void
1179 xml_cdata(void *userData, const XML_Char *s, int len)
1180 {
1181 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1182 free(ctx->cdata);
1183 ctx->cdata = xmemdupz(s, len);
1184 }
1185
1186 static struct remote_lock *lock_remote(const char *path, long timeout)
1187 {
1188 struct active_request_slot *slot;
1189 struct slot_results results;
1190 struct buffer out_buffer = { STRBUF_INIT, 0 };
1191 struct strbuf in_buffer = STRBUF_INIT;
1192 char *url;
1193 char *ep;
1194 char timeout_header[25];
1195 struct remote_lock *lock = NULL;
1196 struct curl_slist *dav_headers = NULL;
1197 struct xml_ctx ctx;
1198
1199 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1200 sprintf(url, "%s%s", remote->url, path);
1201
1202 /* Make sure leading directories exist for the remote ref */
1203 ep = strchr(url + strlen(remote->url) + 1, '/');
1204 while (ep) {
1205 *ep = 0;
1206 slot = get_active_slot();
1207 slot->results = &results;
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1209 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1210 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1211 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1212 if (start_active_slot(slot)) {
1213 run_active_slot(slot);
1214 if (results.curl_result != CURLE_OK &&
1215 results.http_code != 405) {
1216 fprintf(stderr,
1217 "Unable to create branch path %s\n",
1218 url);
1219 free(url);
1220 return NULL;
1221 }
1222 } else {
1223 fprintf(stderr, "Unable to start MKCOL request\n");
1224 free(url);
1225 return NULL;
1226 }
1227 *ep = '/';
1228 ep = strchr(ep + 1, '/');
1229 }
1230
1231 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232
1233 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1234 dav_headers = curl_slist_append(dav_headers, timeout_header);
1235 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1240 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1241 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1244 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1245 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1246 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1247 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248
1249 lock = xcalloc(1, sizeof(*lock));
1250 lock->timeout = -1;
1251
1252 if (start_active_slot(slot)) {
1253 run_active_slot(slot);
1254 if (results.curl_result == CURLE_OK) {
1255 XML_Parser parser = XML_ParserCreate(NULL);
1256 enum XML_Status result;
1257 ctx.name = xcalloc(10, 1);
1258 ctx.len = 0;
1259 ctx.cdata = NULL;
1260 ctx.userFunc = handle_new_lock_ctx;
1261 ctx.userData = lock;
1262 XML_SetUserData(parser, &ctx);
1263 XML_SetElementHandler(parser, xml_start_tag,
1264 xml_end_tag);
1265 XML_SetCharacterDataHandler(parser, xml_cdata);
1266 result = XML_Parse(parser, in_buffer.buf,
1267 in_buffer.len, 1);
1268 free(ctx.name);
1269 if (result != XML_STATUS_OK) {
1270 fprintf(stderr, "XML error: %s\n",
1271 XML_ErrorString(
1272 XML_GetErrorCode(parser)));
1273 lock->timeout = -1;
1274 }
1275 XML_ParserFree(parser);
1276 }
1277 } else {
1278 fprintf(stderr, "Unable to start LOCK request\n");
1279 }
1280
1281 curl_slist_free_all(dav_headers);
1282 strbuf_release(&out_buffer.buf);
1283 strbuf_release(&in_buffer);
1284
1285 if (lock->token == NULL || lock->timeout <= 0) {
1286 if (lock->token != NULL)
1287 free(lock->token);
1288 if (lock->owner != NULL)
1289 free(lock->owner);
1290 free(url);
1291 free(lock);
1292 lock = NULL;
1293 } else {
1294 lock->url = url;
1295 lock->start_time = time(NULL);
1296 lock->next = remote->locks;
1297 remote->locks = lock;
1298 }
1299
1300 return lock;
1301 }
1302
1303 static int unlock_remote(struct remote_lock *lock)
1304 {
1305 struct active_request_slot *slot;
1306 struct slot_results results;
1307 struct remote_lock *prev = remote->locks;
1308 char *lock_token_header;
1309 struct curl_slist *dav_headers = NULL;
1310 int rc = 0;
1311
1312 lock_token_header = xmalloc(strlen(lock->token) + 31);
1313 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1314 lock->token);
1315 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1316
1317 slot = get_active_slot();
1318 slot->results = &results;
1319 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1320 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1321 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1322 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1323
1324 if (start_active_slot(slot)) {
1325 run_active_slot(slot);
1326 if (results.curl_result == CURLE_OK)
1327 rc = 1;
1328 else
1329 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1330 results.http_code);
1331 } else {
1332 fprintf(stderr, "Unable to start UNLOCK request\n");
1333 }
1334
1335 curl_slist_free_all(dav_headers);
1336 free(lock_token_header);
1337
1338 if (remote->locks == lock) {
1339 remote->locks = lock->next;
1340 } else {
1341 while (prev && prev->next != lock)
1342 prev = prev->next;
1343 if (prev)
1344 prev->next = prev->next->next;
1345 }
1346
1347 if (lock->owner != NULL)
1348 free(lock->owner);
1349 free(lock->url);
1350 free(lock->token);
1351 free(lock);
1352
1353 return rc;
1354 }
1355
1356 static void remote_ls(const char *path, int flags,
1357 void (*userFunc)(struct remote_ls_ctx *ls),
1358 void *userData);
1359
1360 static void process_ls_object(struct remote_ls_ctx *ls)
1361 {
1362 unsigned int *parent = (unsigned int *)ls->userData;
1363 char *path = ls->dentry_name;
1364 char *obj_hex;
1365
1366 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1367 remote_dir_exists[*parent] = 1;
1368 return;
1369 }
1370
1371 if (strlen(path) != 49)
1372 return;
1373 path += 8;
1374 obj_hex = xmalloc(strlen(path));
1375 /* NB: path is not null-terminated, can not use strlcpy here */
1376 memcpy(obj_hex, path, 2);
1377 strcpy(obj_hex + 2, path + 3);
1378 one_remote_object(obj_hex);
1379 free(obj_hex);
1380 }
1381
1382 static void process_ls_ref(struct remote_ls_ctx *ls)
1383 {
1384 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1385 fprintf(stderr, " %s\n", ls->dentry_name);
1386 return;
1387 }
1388
1389 if (!(ls->dentry_flags & IS_DIR))
1390 one_remote_ref(ls->dentry_name);
1391 }
1392
1393 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1394 {
1395 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1396
1397 if (tag_closed) {
1398 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1399 if (ls->dentry_flags & IS_DIR) {
1400 if (ls->flags & PROCESS_DIRS) {
1401 ls->userFunc(ls);
1402 }
1403 if (strcmp(ls->dentry_name, ls->path) &&
1404 ls->flags & RECURSIVE) {
1405 remote_ls(ls->dentry_name,
1406 ls->flags,
1407 ls->userFunc,
1408 ls->userData);
1409 }
1410 } else if (ls->flags & PROCESS_FILES) {
1411 ls->userFunc(ls);
1412 }
1413 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1414 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1415 remote->path_len + 1);
1416 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1417 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1418 ls->dentry_flags |= IS_DIR;
1419 }
1420 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1421 free(ls->dentry_name);
1422 ls->dentry_name = NULL;
1423 ls->dentry_flags = 0;
1424 }
1425 }
1426
1427 static void remote_ls(const char *path, int flags,
1428 void (*userFunc)(struct remote_ls_ctx *ls),
1429 void *userData)
1430 {
1431 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1432 struct active_request_slot *slot;
1433 struct slot_results results;
1434 struct strbuf in_buffer = STRBUF_INIT;
1435 struct buffer out_buffer = { STRBUF_INIT, 0 };
1436 struct curl_slist *dav_headers = NULL;
1437 struct xml_ctx ctx;
1438 struct remote_ls_ctx ls;
1439
1440 ls.flags = flags;
1441 ls.path = xstrdup(path);
1442 ls.dentry_name = NULL;
1443 ls.dentry_flags = 0;
1444 ls.userData = userData;
1445 ls.userFunc = userFunc;
1446
1447 sprintf(url, "%s%s", remote->url, path);
1448
1449 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1450
1451 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1452 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1453
1454 slot = get_active_slot();
1455 slot->results = &results;
1456 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1457 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1458 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1459 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1460 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1461 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1462 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1463 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1464 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1465
1466 if (start_active_slot(slot)) {
1467 run_active_slot(slot);
1468 if (results.curl_result == CURLE_OK) {
1469 XML_Parser parser = XML_ParserCreate(NULL);
1470 enum XML_Status result;
1471 ctx.name = xcalloc(10, 1);
1472 ctx.len = 0;
1473 ctx.cdata = NULL;
1474 ctx.userFunc = handle_remote_ls_ctx;
1475 ctx.userData = &ls;
1476 XML_SetUserData(parser, &ctx);
1477 XML_SetElementHandler(parser, xml_start_tag,
1478 xml_end_tag);
1479 XML_SetCharacterDataHandler(parser, xml_cdata);
1480 result = XML_Parse(parser, in_buffer.buf,
1481 in_buffer.len, 1);
1482 free(ctx.name);
1483
1484 if (result != XML_STATUS_OK) {
1485 fprintf(stderr, "XML error: %s\n",
1486 XML_ErrorString(
1487 XML_GetErrorCode(parser)));
1488 }
1489 XML_ParserFree(parser);
1490 }
1491 } else {
1492 fprintf(stderr, "Unable to start PROPFIND request\n");
1493 }
1494
1495 free(ls.path);
1496 free(url);
1497 strbuf_release(&out_buffer.buf);
1498 strbuf_release(&in_buffer);
1499 curl_slist_free_all(dav_headers);
1500 }
1501
1502 static void get_remote_object_list(unsigned char parent)
1503 {
1504 char path[] = "objects/XX/";
1505 static const char hex[] = "0123456789abcdef";
1506 unsigned int val = parent;
1507
1508 path[8] = hex[val >> 4];
1509 path[9] = hex[val & 0xf];
1510 remote_dir_exists[val] = 0;
1511 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1512 process_ls_object, &val);
1513 }
1514
1515 static int locking_available(void)
1516 {
1517 struct active_request_slot *slot;
1518 struct slot_results results;
1519 struct strbuf in_buffer = STRBUF_INIT;
1520 struct buffer out_buffer = { STRBUF_INIT, 0 };
1521 struct curl_slist *dav_headers = NULL;
1522 struct xml_ctx ctx;
1523 int lock_flags = 0;
1524
1525 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1526
1527 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1528 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1529
1530 slot = get_active_slot();
1531 slot->results = &results;
1532 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1533 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1534 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1535 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1536 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1537 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1538 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1539 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1540 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1541
1542 if (start_active_slot(slot)) {
1543 run_active_slot(slot);
1544 if (results.curl_result == CURLE_OK) {
1545 XML_Parser parser = XML_ParserCreate(NULL);
1546 enum XML_Status result;
1547 ctx.name = xcalloc(10, 1);
1548 ctx.len = 0;
1549 ctx.cdata = NULL;
1550 ctx.userFunc = handle_lockprop_ctx;
1551 ctx.userData = &lock_flags;
1552 XML_SetUserData(parser, &ctx);
1553 XML_SetElementHandler(parser, xml_start_tag,
1554 xml_end_tag);
1555 result = XML_Parse(parser, in_buffer.buf,
1556 in_buffer.len, 1);
1557 free(ctx.name);
1558
1559 if (result != XML_STATUS_OK) {
1560 fprintf(stderr, "XML error: %s\n",
1561 XML_ErrorString(
1562 XML_GetErrorCode(parser)));
1563 lock_flags = 0;
1564 }
1565 XML_ParserFree(parser);
1566 }
1567 } else {
1568 fprintf(stderr, "Unable to start PROPFIND request\n");
1569 }
1570
1571 strbuf_release(&out_buffer.buf);
1572 strbuf_release(&in_buffer);
1573 curl_slist_free_all(dav_headers);
1574
1575 return lock_flags;
1576 }
1577
1578 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1579 {
1580 struct object_list *entry = xmalloc(sizeof(struct object_list));
1581 entry->item = obj;
1582 entry->next = *p;
1583 *p = entry;
1584 return &entry->next;
1585 }
1586
1587 static struct object_list **process_blob(struct blob *blob,
1588 struct object_list **p,
1589 struct name_path *path,
1590 const char *name)
1591 {
1592 struct object *obj = &blob->object;
1593
1594 obj->flags |= LOCAL;
1595
1596 if (obj->flags & (UNINTERESTING | SEEN))
1597 return p;
1598
1599 obj->flags |= SEEN;
1600 return add_one_object(obj, p);
1601 }
1602
1603 static struct object_list **process_tree(struct tree *tree,
1604 struct object_list **p,
1605 struct name_path *path,
1606 const char *name)
1607 {
1608 struct object *obj = &tree->object;
1609 struct tree_desc desc;
1610 struct name_entry entry;
1611 struct name_path me;
1612
1613 obj->flags |= LOCAL;
1614
1615 if (obj->flags & (UNINTERESTING | SEEN))
1616 return p;
1617 if (parse_tree(tree) < 0)
1618 die("bad tree object %s", sha1_to_hex(obj->sha1));
1619
1620 obj->flags |= SEEN;
1621 name = xstrdup(name);
1622 p = add_one_object(obj, p);
1623 me.up = path;
1624 me.elem = name;
1625 me.elem_len = strlen(name);
1626
1627 init_tree_desc(&desc, tree->buffer, tree->size);
1628
1629 while (tree_entry(&desc, &entry)) {
1630 if (S_ISDIR(entry.mode))
1631 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1632 else
1633 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1634 }
1635 free(tree->buffer);
1636 tree->buffer = NULL;
1637 return p;
1638 }
1639
1640 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1641 {
1642 int i;
1643 struct commit *commit;
1644 struct object_list **p = &objects;
1645 int count = 0;
1646
1647 while ((commit = get_revision(revs)) != NULL) {
1648 p = process_tree(commit->tree, p, NULL, "");
1649 commit->object.flags |= LOCAL;
1650 if (!(commit->object.flags & UNINTERESTING))
1651 count += add_send_request(&commit->object, lock);
1652 }
1653
1654 for (i = 0; i < revs->pending.nr; i++) {
1655 struct object_array_entry *entry = revs->pending.objects + i;
1656 struct object *obj = entry->item;
1657 const char *name = entry->name;
1658
1659 if (obj->flags & (UNINTERESTING | SEEN))
1660 continue;
1661 if (obj->type == OBJ_TAG) {
1662 obj->flags |= SEEN;
1663 p = add_one_object(obj, p);
1664 continue;
1665 }
1666 if (obj->type == OBJ_TREE) {
1667 p = process_tree((struct tree *)obj, p, NULL, name);
1668 continue;
1669 }
1670 if (obj->type == OBJ_BLOB) {
1671 p = process_blob((struct blob *)obj, p, NULL, name);
1672 continue;
1673 }
1674 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1675 }
1676
1677 while (objects) {
1678 if (!(objects->item->flags & UNINTERESTING))
1679 count += add_send_request(objects->item, lock);
1680 objects = objects->next;
1681 }
1682
1683 return count;
1684 }
1685
1686 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1687 {
1688 struct active_request_slot *slot;
1689 struct slot_results results;
1690 char *if_header;
1691 struct buffer out_buffer = { STRBUF_INIT, 0 };
1692 struct curl_slist *dav_headers = NULL;
1693
1694 if_header = xmalloc(strlen(lock->token) + 25);
1695 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1696 dav_headers = curl_slist_append(dav_headers, if_header);
1697
1698 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1699
1700 slot = get_active_slot();
1701 slot->results = &results;
1702 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1703 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1704 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1705 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1706 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1707 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1708 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1709 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1710 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1711
1712 if (start_active_slot(slot)) {
1713 run_active_slot(slot);
1714 strbuf_release(&out_buffer.buf);
1715 free(if_header);
1716 if (results.curl_result != CURLE_OK) {
1717 fprintf(stderr,
1718 "PUT error: curl result=%d, HTTP code=%ld\n",
1719 results.curl_result, results.http_code);
1720 /* We should attempt recovery? */
1721 return 0;
1722 }
1723 } else {
1724 strbuf_release(&out_buffer.buf);
1725 free(if_header);
1726 fprintf(stderr, "Unable to start PUT request\n");
1727 return 0;
1728 }
1729
1730 return 1;
1731 }
1732
1733 static struct ref *local_refs, **local_tail;
1734 static struct ref *remote_refs, **remote_tail;
1735
1736 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1737 {
1738 struct ref *ref;
1739 int len = strlen(refname) + 1;
1740 ref = xcalloc(1, sizeof(*ref) + len);
1741 hashcpy(ref->new_sha1, sha1);
1742 memcpy(ref->name, refname, len);
1743 *local_tail = ref;
1744 local_tail = &ref->next;
1745 return 0;
1746 }
1747
1748 static void one_remote_ref(char *refname)
1749 {
1750 struct ref *ref;
1751 unsigned char remote_sha1[20];
1752 struct object *obj;
1753 int len = strlen(refname) + 1;
1754
1755 if (http_fetch_ref(remote->url, refname + 5 /* "refs/" */,
1756 remote_sha1) != 0) {
1757 fprintf(stderr,
1758 "Unable to fetch ref %s from %s\n",
1759 refname, remote->url);
1760 return;
1761 }
1762
1763 /*
1764 * Fetch a copy of the object if it doesn't exist locally - it
1765 * may be required for updating server info later.
1766 */
1767 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1768 obj = lookup_unknown_object(remote_sha1);
1769 if (obj) {
1770 fprintf(stderr, " fetch %s for %s\n",
1771 sha1_to_hex(remote_sha1), refname);
1772 add_fetch_request(obj);
1773 }
1774 }
1775
1776 ref = xcalloc(1, sizeof(*ref) + len);
1777 hashcpy(ref->old_sha1, remote_sha1);
1778 memcpy(ref->name, refname, len);
1779 *remote_tail = ref;
1780 remote_tail = &ref->next;
1781 }
1782
1783 static void get_local_heads(void)
1784 {
1785 local_tail = &local_refs;
1786 for_each_ref(one_local_ref, NULL);
1787 }
1788
1789 static void get_dav_remote_heads(void)
1790 {
1791 remote_tail = &remote_refs;
1792 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1793 }
1794
1795 static int is_zero_sha1(const unsigned char *sha1)
1796 {
1797 int i;
1798
1799 for (i = 0; i < 20; i++) {
1800 if (*sha1++)
1801 return 0;
1802 }
1803 return 1;
1804 }
1805
1806 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1807 {
1808 while (list) {
1809 struct commit_list *temp = list;
1810 temp->item->object.flags &= ~mark;
1811 list = temp->next;
1812 free(temp);
1813 }
1814 }
1815
1816 static int ref_newer(const unsigned char *new_sha1,
1817 const unsigned char *old_sha1)
1818 {
1819 struct object *o;
1820 struct commit *old, *new;
1821 struct commit_list *list, *used;
1822 int found = 0;
1823
1824 /* Both new and old must be commit-ish and new is descendant of
1825 * old. Otherwise we require --force.
1826 */
1827 o = deref_tag(parse_object(old_sha1), NULL, 0);
1828 if (!o || o->type != OBJ_COMMIT)
1829 return 0;
1830 old = (struct commit *) o;
1831
1832 o = deref_tag(parse_object(new_sha1), NULL, 0);
1833 if (!o || o->type != OBJ_COMMIT)
1834 return 0;
1835 new = (struct commit *) o;
1836
1837 if (parse_commit(new) < 0)
1838 return 0;
1839
1840 used = list = NULL;
1841 commit_list_insert(new, &list);
1842 while (list) {
1843 new = pop_most_recent_commit(&list, TMP_MARK);
1844 commit_list_insert(new, &used);
1845 if (new == old) {
1846 found = 1;
1847 break;
1848 }
1849 }
1850 unmark_and_free(list, TMP_MARK);
1851 unmark_and_free(used, TMP_MARK);
1852 return found;
1853 }
1854
1855 static void mark_edge_parents_uninteresting(struct commit *commit)
1856 {
1857 struct commit_list *parents;
1858
1859 for (parents = commit->parents; parents; parents = parents->next) {
1860 struct commit *parent = parents->item;
1861 if (!(parent->object.flags & UNINTERESTING))
1862 continue;
1863 mark_tree_uninteresting(parent->tree);
1864 }
1865 }
1866
1867 static void mark_edges_uninteresting(struct commit_list *list)
1868 {
1869 for ( ; list; list = list->next) {
1870 struct commit *commit = list->item;
1871
1872 if (commit->object.flags & UNINTERESTING) {
1873 mark_tree_uninteresting(commit->tree);
1874 continue;
1875 }
1876 mark_edge_parents_uninteresting(commit);
1877 }
1878 }
1879
1880 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1881 {
1882 struct strbuf *buf = (struct strbuf *)ls->userData;
1883 unsigned char remote_sha1[20];
1884 struct object *o;
1885 int len;
1886 char *ref_info;
1887
1888 if (http_fetch_ref(remote->url, ls->dentry_name + 5 /* "refs/" */,
1889 remote_sha1) != 0) {
1890 fprintf(stderr,
1891 "Unable to fetch ref %s from %s\n",
1892 ls->dentry_name, remote->url);
1893 aborted = 1;
1894 return;
1895 }
1896
1897 o = parse_object(remote_sha1);
1898 if (!o) {
1899 fprintf(stderr,
1900 "Unable to parse object %s for remote ref %s\n",
1901 sha1_to_hex(remote_sha1), ls->dentry_name);
1902 aborted = 1;
1903 return;
1904 }
1905
1906 len = strlen(ls->dentry_name) + 42;
1907 ref_info = xcalloc(len + 1, 1);
1908 sprintf(ref_info, "%s %s\n",
1909 sha1_to_hex(remote_sha1), ls->dentry_name);
1910 fwrite_buffer(ref_info, 1, len, buf);
1911 free(ref_info);
1912
1913 if (o->type == OBJ_TAG) {
1914 o = deref_tag(o, ls->dentry_name, 0);
1915 if (o) {
1916 len = strlen(ls->dentry_name) + 45;
1917 ref_info = xcalloc(len + 1, 1);
1918 sprintf(ref_info, "%s %s^{}\n",
1919 sha1_to_hex(o->sha1), ls->dentry_name);
1920 fwrite_buffer(ref_info, 1, len, buf);
1921 free(ref_info);
1922 }
1923 }
1924 }
1925
1926 static void update_remote_info_refs(struct remote_lock *lock)
1927 {
1928 struct buffer buffer = { STRBUF_INIT, 0 };
1929 struct active_request_slot *slot;
1930 struct slot_results results;
1931 char *if_header;
1932 struct curl_slist *dav_headers = NULL;
1933
1934 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1935 add_remote_info_ref, &buffer.buf);
1936 if (!aborted) {
1937 if_header = xmalloc(strlen(lock->token) + 25);
1938 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1939 dav_headers = curl_slist_append(dav_headers, if_header);
1940
1941 slot = get_active_slot();
1942 slot->results = &results;
1943 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1944 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1945 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1946 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1947 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1948 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1949 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1950 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1951 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1952
1953 if (start_active_slot(slot)) {
1954 run_active_slot(slot);
1955 if (results.curl_result != CURLE_OK) {
1956 fprintf(stderr,
1957 "PUT error: curl result=%d, HTTP code=%ld\n",
1958 results.curl_result, results.http_code);
1959 }
1960 }
1961 free(if_header);
1962 }
1963 strbuf_release(&buffer.buf);
1964 }
1965
1966 static int remote_exists(const char *path)
1967 {
1968 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1969 struct active_request_slot *slot;
1970 struct slot_results results;
1971 int ret = -1;
1972
1973 sprintf(url, "%s%s", remote->url, path);
1974
1975 slot = get_active_slot();
1976 slot->results = &results;
1977 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1978 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1979
1980 if (start_active_slot(slot)) {
1981 run_active_slot(slot);
1982 if (results.http_code == 404)
1983 ret = 0;
1984 else if (results.curl_result == CURLE_OK)
1985 ret = 1;
1986 else
1987 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1988 } else {
1989 fprintf(stderr, "Unable to start HEAD request\n");
1990 }
1991
1992 free(url);
1993 return ret;
1994 }
1995
1996 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1997 {
1998 char *url;
1999 struct strbuf buffer = STRBUF_INIT;
2000 struct active_request_slot *slot;
2001 struct slot_results results;
2002
2003 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2004 sprintf(url, "%s%s", remote->url, path);
2005
2006 slot = get_active_slot();
2007 slot->results = &results;
2008 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2009 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2010 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2011 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2012 if (start_active_slot(slot)) {
2013 run_active_slot(slot);
2014 if (results.curl_result != CURLE_OK) {
2015 die("Couldn't get %s for remote symref\n%s",
2016 url, curl_errorstr);
2017 }
2018 } else {
2019 die("Unable to start remote symref request");
2020 }
2021 free(url);
2022
2023 if (*symref != NULL)
2024 free(*symref);
2025 *symref = NULL;
2026 hashclr(sha1);
2027
2028 if (buffer.len == 0)
2029 return;
2030
2031 /* If it's a symref, set the refname; otherwise try for a sha1 */
2032 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2033 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2034 } else {
2035 get_sha1_hex(buffer.buf, sha1);
2036 }
2037
2038 strbuf_release(&buffer);
2039 }
2040
2041 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2042 {
2043 struct commit *head = lookup_commit(head_sha1);
2044 struct commit *branch = lookup_commit(branch_sha1);
2045 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2046
2047 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2048 }
2049
2050 static int delete_remote_branch(char *pattern, int force)
2051 {
2052 struct ref *refs = remote_refs;
2053 struct ref *remote_ref = NULL;
2054 unsigned char head_sha1[20];
2055 char *symref = NULL;
2056 int match;
2057 int patlen = strlen(pattern);
2058 int i;
2059 struct active_request_slot *slot;
2060 struct slot_results results;
2061 char *url;
2062
2063 /* Find the remote branch(es) matching the specified branch name */
2064 for (match = 0; refs; refs = refs->next) {
2065 char *name = refs->name;
2066 int namelen = strlen(name);
2067 if (namelen < patlen ||
2068 memcmp(name + namelen - patlen, pattern, patlen))
2069 continue;
2070 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2071 continue;
2072 match++;
2073 remote_ref = refs;
2074 }
2075 if (match == 0)
2076 return error("No remote branch matches %s", pattern);
2077 if (match != 1)
2078 return error("More than one remote branch matches %s",
2079 pattern);
2080
2081 /*
2082 * Remote HEAD must be a symref (not exactly foolproof; a remote
2083 * symlink to a symref will look like a symref)
2084 */
2085 fetch_symref("HEAD", &symref, head_sha1);
2086 if (!symref)
2087 return error("Remote HEAD is not a symref");
2088
2089 /* Remote branch must not be the remote HEAD */
2090 for (i=0; symref && i<MAXDEPTH; i++) {
2091 if (!strcmp(remote_ref->name, symref))
2092 return error("Remote branch %s is the current HEAD",
2093 remote_ref->name);
2094 fetch_symref(symref, &symref, head_sha1);
2095 }
2096
2097 /* Run extra sanity checks if delete is not forced */
2098 if (!force) {
2099 /* Remote HEAD must resolve to a known object */
2100 if (symref)
2101 return error("Remote HEAD symrefs too deep");
2102 if (is_zero_sha1(head_sha1))
2103 return error("Unable to resolve remote HEAD");
2104 if (!has_sha1_file(head_sha1))
2105 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2106
2107 /* Remote branch must resolve to a known object */
2108 if (is_zero_sha1(remote_ref->old_sha1))
2109 return error("Unable to resolve remote branch %s",
2110 remote_ref->name);
2111 if (!has_sha1_file(remote_ref->old_sha1))
2112 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));
2113
2114 /* Remote branch must be an ancestor of remote HEAD */
2115 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2116 return error("The branch '%s' is not an ancestor "
2117 "of your current HEAD.\n"
2118 "If you are sure you want to delete it,"
2119 " run:\n\t'git http-push -D %s %s'",
2120 remote_ref->name, remote->url, pattern);
2121 }
2122 }
2123
2124 /* Send delete request */
2125 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2126 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2127 sprintf(url, "%s%s", remote->url, remote_ref->name);
2128 slot = get_active_slot();
2129 slot->results = &results;
2130 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2131 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2132 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2133 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2134 if (start_active_slot(slot)) {
2135 run_active_slot(slot);
2136 free(url);
2137 if (results.curl_result != CURLE_OK)
2138 return error("DELETE request failed (%d/%ld)\n",
2139 results.curl_result, results.http_code);
2140 } else {
2141 free(url);
2142 return error("Unable to start DELETE request");
2143 }
2144
2145 return 0;
2146 }
2147
2148 int main(int argc, char **argv)
2149 {
2150 struct transfer_request *request;
2151 struct transfer_request *next_request;
2152 int nr_refspec = 0;
2153 char **refspec = NULL;
2154 struct remote_lock *ref_lock = NULL;
2155 struct remote_lock *info_ref_lock = NULL;
2156 struct rev_info revs;
2157 int delete_branch = 0;
2158 int force_delete = 0;
2159 int objects_to_send;
2160 int rc = 0;
2161 int i;
2162 int new_refs;
2163 struct ref *ref;
2164
2165 setup_git_directory();
2166
2167 remote = xcalloc(sizeof(*remote), 1);
2168
2169 argv++;
2170 for (i = 1; i < argc; i++, argv++) {
2171 char *arg = *argv;
2172
2173 if (*arg == '-') {
2174 if (!strcmp(arg, "--all")) {
2175 push_all = MATCH_REFS_ALL;
2176 continue;
2177 }
2178 if (!strcmp(arg, "--force")) {
2179 force_all = 1;
2180 continue;
2181 }
2182 if (!strcmp(arg, "--dry-run")) {
2183 dry_run = 1;
2184 continue;
2185 }
2186 if (!strcmp(arg, "--verbose")) {
2187 push_verbosely = 1;
2188 continue;
2189 }
2190 if (!strcmp(arg, "-d")) {
2191 delete_branch = 1;
2192 continue;
2193 }
2194 if (!strcmp(arg, "-D")) {
2195 delete_branch = 1;
2196 force_delete = 1;
2197 continue;
2198 }
2199 }
2200 if (!remote->url) {
2201 char *path = strstr(arg, "//");
2202 remote->url = arg;
2203 if (path) {
2204 path = strchr(path+2, '/');
2205 if (path)
2206 remote->path_len = strlen(path);
2207 }
2208 continue;
2209 }
2210 refspec = argv;
2211 nr_refspec = argc - i;
2212 break;
2213 }
2214
2215 #ifndef USE_CURL_MULTI
2216 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2217 #endif
2218
2219 if (!remote->url)
2220 usage(http_push_usage);
2221
2222 if (delete_branch && nr_refspec != 1)
2223 die("You must specify only one branch name when deleting a remote branch");
2224
2225 memset(remote_dir_exists, -1, 256);
2226
2227 http_init();
2228
2229 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2230
2231 /* Verify DAV compliance/lock support */
2232 if (!locking_available()) {
2233 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2234 rc = 1;
2235 goto cleanup;
2236 }
2237
2238 /* Check whether the remote has server info files */
2239 remote->can_update_info_refs = 0;
2240 remote->has_info_refs = remote_exists("info/refs");
2241 remote->has_info_packs = remote_exists("objects/info/packs");
2242 if (remote->has_info_refs) {
2243 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2244 if (info_ref_lock)
2245 remote->can_update_info_refs = 1;
2246 else {
2247 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2248 rc = 1;
2249 goto cleanup;
2250 }
2251 }
2252 if (remote->has_info_packs)
2253 fetch_indices();
2254
2255 /* Get a list of all local and remote heads to validate refspecs */
2256 get_local_heads();
2257 fprintf(stderr, "Fetching remote heads...\n");
2258 get_dav_remote_heads();
2259
2260 /* Remove a remote branch if -d or -D was specified */
2261 if (delete_branch) {
2262 if (delete_remote_branch(refspec[0], force_delete) == -1)
2263 fprintf(stderr, "Unable to delete remote branch %s\n",
2264 refspec[0]);
2265 goto cleanup;
2266 }
2267
2268 /* match them up */
2269 if (!remote_tail)
2270 remote_tail = &remote_refs;
2271 if (match_refs(local_refs, remote_refs, &remote_tail,
2272 nr_refspec, (const char **) refspec, push_all)) {
2273 rc = -1;
2274 goto cleanup;
2275 }
2276 if (!remote_refs) {
2277 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2278 rc = 0;
2279 goto cleanup;
2280 }
2281
2282 new_refs = 0;
2283 for (ref = remote_refs; ref; ref = ref->next) {
2284 char old_hex[60], *new_hex;
2285 const char *commit_argv[4];
2286 int commit_argc;
2287 char *new_sha1_hex, *old_sha1_hex;
2288
2289 if (!ref->peer_ref)
2290 continue;
2291 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2292 if (push_verbosely || 1)
2293 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2294 continue;
2295 }
2296
2297 if (!force_all &&
2298 !is_zero_sha1(ref->old_sha1) &&
2299 !ref->force) {
2300 if (!has_sha1_file(ref->old_sha1) ||
2301 !ref_newer(ref->peer_ref->new_sha1,
2302 ref->old_sha1)) {
2303 /*
2304 * We do not have the remote ref, or
2305 * we know that the remote ref is not
2306 * an ancestor of what we are trying to
2307 * push. Either way this can be losing
2308 * commits at the remote end and likely
2309 * we were not up to date to begin with.
2310 */
2311 error("remote '%s' is not an ancestor of\n"
2312 "local '%s'.\n"
2313 "Maybe you are not up-to-date and "
2314 "need to pull first?",
2315 ref->name,
2316 ref->peer_ref->name);
2317 rc = -2;
2318 continue;
2319 }
2320 }
2321 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2322 if (is_zero_sha1(ref->new_sha1)) {
2323 error("cannot happen anymore");
2324 rc = -3;
2325 continue;
2326 }
2327 new_refs++;
2328 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2329 new_hex = sha1_to_hex(ref->new_sha1);
2330
2331 fprintf(stderr, "updating '%s'", ref->name);
2332 if (strcmp(ref->name, ref->peer_ref->name))
2333 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2334 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2335 if (dry_run)
2336 continue;
2337
2338 /* Lock remote branch ref */
2339 ref_lock = lock_remote(ref->name, LOCK_TIME);
2340 if (ref_lock == NULL) {
2341 fprintf(stderr, "Unable to lock remote branch %s\n",
2342 ref->name);
2343 rc = 1;
2344 continue;
2345 }
2346
2347 /* Set up revision info for this refspec */
2348 commit_argc = 3;
2349 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2350 old_sha1_hex = NULL;
2351 commit_argv[1] = "--objects";
2352 commit_argv[2] = new_sha1_hex;
2353 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2354 old_sha1_hex = xmalloc(42);
2355 sprintf(old_sha1_hex, "^%s",
2356 sha1_to_hex(ref->old_sha1));
2357 commit_argv[3] = old_sha1_hex;
2358 commit_argc++;
2359 }
2360 init_revisions(&revs, setup_git_directory());
2361 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2362 free(new_sha1_hex);
2363 if (old_sha1_hex) {
2364 free(old_sha1_hex);
2365 commit_argv[1] = NULL;
2366 }
2367
2368 /* Generate a list of objects that need to be pushed */
2369 pushing = 0;
2370 prepare_revision_walk(&revs);
2371 mark_edges_uninteresting(revs.commits);
2372 objects_to_send = get_delta(&revs, ref_lock);
2373 finish_all_active_slots();
2374
2375 /* Push missing objects to remote, this would be a
2376 convenient time to pack them first if appropriate. */
2377 pushing = 1;
2378 if (objects_to_send)
2379 fprintf(stderr, " sending %d objects\n",
2380 objects_to_send);
2381 #ifdef USE_CURL_MULTI
2382 fill_active_slots();
2383 add_fill_function(NULL, fill_active_slot);
2384 #endif
2385 finish_all_active_slots();
2386
2387 /* Update the remote branch if all went well */
2388 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2389 rc = 1;
2390 goto unlock;
2391 }
2392
2393 unlock:
2394 if (!rc)
2395 fprintf(stderr, " done\n");
2396 unlock_remote(ref_lock);
2397 check_locks();
2398 }
2399
2400 /* Update remote server info if appropriate */
2401 if (remote->has_info_refs && new_refs) {
2402 if (info_ref_lock && remote->can_update_info_refs) {
2403 fprintf(stderr, "Updating remote server info\n");
2404 if (!dry_run)
2405 update_remote_info_refs(info_ref_lock);
2406 } else {
2407 fprintf(stderr, "Unable to update server info\n");
2408 }
2409 }
2410
2411 cleanup:
2412 if (info_ref_lock)
2413 unlock_remote(info_ref_lock);
2414 free(remote);
2415
2416 curl_slist_free_all(no_pragma_header);
2417
2418 http_cleanup();
2419
2420 request = request_queue_head;
2421 while (request != NULL) {
2422 next_request = request->next;
2423 release_request(request);
2424 request = next_request;
2425 }
2426
2427 return rc;
2428 }
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