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t5510: harden the way verify-pack is used
[alt-git.git] / http-push.c
blob0696da0fec5a4e1f2f089b1f47ff6bb88d1032e7
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12 #include "list-objects.h"
13
14 #include <expat.h>
15
16 static const char http_push_usage[] =
17 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
18
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21 XML_STATUS_OK = 1,
22 XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK 1
25 #define XML_STATUS_ERROR 0
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
39
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
44
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
55
56 /* DAV request body templates */
57 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
60
61 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
63
64 /* bits #0-15 in revision.h */
65
66 #define LOCAL (1u<<16)
67 #define REMOTE (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING (1u<<19)
70
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
73
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
77
78 static struct curl_slist *no_pragma_header;
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 int path_len;
91 int has_info_refs;
92 int can_update_info_refs;
93 int has_info_packs;
94 struct packed_git *packs;
95 struct remote_lock *locks;
96 };
97
98 static struct repo *remote;
99
100 enum transfer_state {
101 NEED_FETCH,
102 RUN_FETCH_LOOSE,
103 RUN_FETCH_PACKED,
104 NEED_PUSH,
105 RUN_MKCOL,
106 RUN_PUT,
107 RUN_MOVE,
108 ABORTED,
109 COMPLETE,
110 };
111
112 struct transfer_request
113 {
114 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 char filename[PATH_MAX];
121 char tmpfile[PATH_MAX];
122 int local_fileno;
123 FILE *local_stream;
124 enum transfer_state state;
125 CURLcode curl_result;
126 char errorstr[CURL_ERROR_SIZE];
127 long http_code;
128 unsigned char real_sha1[20];
129 SHA_CTX c;
130 z_stream stream;
131 int zret;
132 int rename;
133 void *userData;
134 struct active_request_slot *slot;
135 struct transfer_request *next;
136 };
137
138 static struct transfer_request *request_queue_head;
139
140 struct xml_ctx
141 {
142 char *name;
143 int len;
144 char *cdata;
145 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
146 void *userData;
147 };
148
149 struct remote_lock
150 {
151 char *url;
152 char *owner;
153 char *token;
154 time_t start_time;
155 long timeout;
156 int refreshing;
157 struct remote_lock *next;
158 };
159
160 /* Flags that control remote_ls processing */
161 #define PROCESS_FILES (1u << 0)
162 #define PROCESS_DIRS (1u << 1)
163 #define RECURSIVE (1u << 2)
164
165 /* Flags that remote_ls passes to callback functions */
166 #define IS_DIR (1u << 0)
167
168 struct remote_ls_ctx
169 {
170 char *path;
171 void (*userFunc)(struct remote_ls_ctx *ls);
172 void *userData;
173 int flags;
174 char *dentry_name;
175 int dentry_flags;
176 struct remote_ls_ctx *parent;
177 };
178
179 static void finish_request(struct transfer_request *request);
180 static void release_request(struct transfer_request *request);
181
182 static void process_response(void *callback_data)
183 {
184 struct transfer_request *request =
185 (struct transfer_request *)callback_data;
186
187 finish_request(request);
188 }
189
190 #ifdef USE_CURL_MULTI
191 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
192 void *data)
193 {
194 unsigned char expn[4096];
195 size_t size = eltsize * nmemb;
196 int posn = 0;
197 struct transfer_request *request = (struct transfer_request *)data;
198 do {
199 ssize_t retval = xwrite(request->local_fileno,
200 (char *) ptr + posn, size - posn);
201 if (retval < 0)
202 return posn;
203 posn += retval;
204 } while (posn < size);
205
206 request->stream.avail_in = size;
207 request->stream.next_in = ptr;
208 do {
209 request->stream.next_out = expn;
210 request->stream.avail_out = sizeof(expn);
211 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
212 SHA1_Update(&request->c, expn,
213 sizeof(expn) - request->stream.avail_out);
214 } while (request->stream.avail_in && request->zret == Z_OK);
215 data_received++;
216 return size;
217 }
218
219 static void start_fetch_loose(struct transfer_request *request)
220 {
221 char *hex = sha1_to_hex(request->obj->sha1);
222 char *filename;
223 char prevfile[PATH_MAX];
224 char *url;
225 char *posn;
226 int prevlocal;
227 unsigned char prev_buf[PREV_BUF_SIZE];
228 ssize_t prev_read = 0;
229 long prev_posn = 0;
230 char range[RANGE_HEADER_SIZE];
231 struct curl_slist *range_header = NULL;
232 struct active_request_slot *slot;
233
234 filename = sha1_file_name(request->obj->sha1);
235 snprintf(request->filename, sizeof(request->filename), "%s", filename);
236 snprintf(request->tmpfile, sizeof(request->tmpfile),
237 "%s.temp", filename);
238
239 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
240 unlink(prevfile);
241 rename(request->tmpfile, prevfile);
242 unlink(request->tmpfile);
243
244 if (request->local_fileno != -1)
245 error("fd leakage in start: %d", request->local_fileno);
246 request->local_fileno = open(request->tmpfile,
247 O_WRONLY | O_CREAT | O_EXCL, 0666);
248 /* This could have failed due to the "lazy directory creation";
249 * try to mkdir the last path component.
250 */
251 if (request->local_fileno < 0 && errno == ENOENT) {
252 char *dir = strrchr(request->tmpfile, '/');
253 if (dir) {
254 *dir = 0;
255 mkdir(request->tmpfile, 0777);
256 *dir = '/';
257 }
258 request->local_fileno = open(request->tmpfile,
259 O_WRONLY | O_CREAT | O_EXCL, 0666);
260 }
261
262 if (request->local_fileno < 0) {
263 request->state = ABORTED;
264 error("Couldn't create temporary file %s for %s: %s",
265 request->tmpfile, request->filename, strerror(errno));
266 return;
267 }
268
269 memset(&request->stream, 0, sizeof(request->stream));
270
271 inflateInit(&request->stream);
272
273 SHA1_Init(&request->c);
274
275 url = xmalloc(strlen(remote->url) + 50);
276 request->url = xmalloc(strlen(remote->url) + 50);
277 strcpy(url, remote->url);
278 posn = url + strlen(remote->url);
279 strcpy(posn, "objects/");
280 posn += 8;
281 memcpy(posn, hex, 2);
282 posn += 2;
283 *(posn++) = '/';
284 strcpy(posn, hex + 2);
285 strcpy(request->url, url);
286
287 /* If a previous temp file is present, process what was already
288 fetched. */
289 prevlocal = open(prevfile, O_RDONLY);
290 if (prevlocal != -1) {
291 do {
292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
293 if (prev_read>0) {
294 if (fwrite_sha1_file(prev_buf,
295 1,
296 prev_read,
297 request) == prev_read) {
298 prev_posn += prev_read;
299 } else {
300 prev_read = -1;
301 }
302 }
303 } while (prev_read > 0);
304 close(prevlocal);
305 }
306 unlink(prevfile);
307
308 /* Reset inflate/SHA1 if there was an error reading the previous temp
309 file; also rewind to the beginning of the local file. */
310 if (prev_read == -1) {
311 memset(&request->stream, 0, sizeof(request->stream));
312 inflateInit(&request->stream);
313 SHA1_Init(&request->c);
314 if (prev_posn>0) {
315 prev_posn = 0;
316 lseek(request->local_fileno, 0, SEEK_SET);
317 ftruncate(request->local_fileno, 0);
318 }
319 }
320
321 slot = get_active_slot();
322 slot->callback_func = process_response;
323 slot->callback_data = request;
324 request->slot = slot;
325
326 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
327 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
328 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
329 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
330 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
331
332 /* If we have successfully processed data from a previous fetch
333 attempt, only fetch the data we don't already have. */
334 if (prev_posn>0) {
335 if (push_verbosely)
336 fprintf(stderr,
337 "Resuming fetch of object %s at byte %ld\n",
338 hex, prev_posn);
339 sprintf(range, "Range: bytes=%ld-", prev_posn);
340 range_header = curl_slist_append(range_header, range);
341 curl_easy_setopt(slot->curl,
342 CURLOPT_HTTPHEADER, range_header);
343 }
344
345 /* Try to get the request started, abort the request on error */
346 request->state = RUN_FETCH_LOOSE;
347 if (!start_active_slot(slot)) {
348 fprintf(stderr, "Unable to start GET request\n");
349 remote->can_update_info_refs = 0;
350 release_request(request);
351 }
352 }
353
354 static void start_mkcol(struct transfer_request *request)
355 {
356 char *hex = sha1_to_hex(request->obj->sha1);
357 struct active_request_slot *slot;
358 char *posn;
359
360 request->url = xmalloc(strlen(remote->url) + 13);
361 strcpy(request->url, remote->url);
362 posn = request->url + strlen(remote->url);
363 strcpy(posn, "objects/");
364 posn += 8;
365 memcpy(posn, hex, 2);
366 posn += 2;
367 strcpy(posn, "/");
368
369 slot = get_active_slot();
370 slot->callback_func = process_response;
371 slot->callback_data = request;
372 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
373 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
374 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
375 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
376 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
377
378 if (start_active_slot(slot)) {
379 request->slot = slot;
380 request->state = RUN_MKCOL;
381 } else {
382 request->state = ABORTED;
383 free(request->url);
384 request->url = NULL;
385 }
386 }
387 #endif
388
389 static void start_fetch_packed(struct transfer_request *request)
390 {
391 char *url;
392 struct packed_git *target;
393 FILE *packfile;
394 char *filename;
395 long prev_posn = 0;
396 char range[RANGE_HEADER_SIZE];
397 struct curl_slist *range_header = NULL;
398
399 struct transfer_request *check_request = request_queue_head;
400 struct active_request_slot *slot;
401
402 target = find_sha1_pack(request->obj->sha1, remote->packs);
403 if (!target) {
404 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
405 remote->can_update_info_refs = 0;
406 release_request(request);
407 return;
408 }
409
410 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
411 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
412
413 filename = sha1_pack_name(target->sha1);
414 snprintf(request->filename, sizeof(request->filename), "%s", filename);
415 snprintf(request->tmpfile, sizeof(request->tmpfile),
416 "%s.temp", filename);
417
418 url = xmalloc(strlen(remote->url) + 64);
419 sprintf(url, "%sobjects/pack/pack-%s.pack",
420 remote->url, sha1_to_hex(target->sha1));
421
422 /* Make sure there isn't another open request for this pack */
423 while (check_request) {
424 if (check_request->state == RUN_FETCH_PACKED &&
425 !strcmp(check_request->url, url)) {
426 free(url);
427 release_request(request);
428 return;
429 }
430 check_request = check_request->next;
431 }
432
433 packfile = fopen(request->tmpfile, "a");
434 if (!packfile) {
435 fprintf(stderr, "Unable to open local file %s for pack",
436 request->tmpfile);
437 remote->can_update_info_refs = 0;
438 free(url);
439 return;
440 }
441
442 slot = get_active_slot();
443 slot->callback_func = process_response;
444 slot->callback_data = request;
445 request->slot = slot;
446 request->local_stream = packfile;
447 request->userData = target;
448
449 request->url = url;
450 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
451 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
452 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
454 slot->local = packfile;
455
456 /* If there is data present from a previous transfer attempt,
457 resume where it left off */
458 prev_posn = ftell(packfile);
459 if (prev_posn>0) {
460 if (push_verbosely)
461 fprintf(stderr,
462 "Resuming fetch of pack %s at byte %ld\n",
463 sha1_to_hex(target->sha1), prev_posn);
464 sprintf(range, "Range: bytes=%ld-", prev_posn);
465 range_header = curl_slist_append(range_header, range);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
467 }
468
469 /* Try to get the request started, abort the request on error */
470 request->state = RUN_FETCH_PACKED;
471 if (!start_active_slot(slot)) {
472 fprintf(stderr, "Unable to start GET request\n");
473 remote->can_update_info_refs = 0;
474 release_request(request);
475 }
476 }
477
478 static void start_put(struct transfer_request *request)
479 {
480 char *hex = sha1_to_hex(request->obj->sha1);
481 struct active_request_slot *slot;
482 char *posn;
483 enum object_type type;
484 char hdr[50];
485 void *unpacked;
486 unsigned long len;
487 int hdrlen;
488 ssize_t size;
489 z_stream stream;
490
491 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
492 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
493
494 /* Set it up */
495 memset(&stream, 0, sizeof(stream));
496 deflateInit(&stream, zlib_compression_level);
497 size = deflateBound(&stream, len + hdrlen);
498 strbuf_init(&request->buffer.buf, size);
499 request->buffer.posn = 0;
500
501 /* Compress it */
502 stream.next_out = (unsigned char *)request->buffer.buf.buf;
503 stream.avail_out = size;
504
505 /* First header.. */
506 stream.next_in = (void *)hdr;
507 stream.avail_in = hdrlen;
508 while (deflate(&stream, 0) == Z_OK)
509 /* nothing */;
510
511 /* Then the data itself.. */
512 stream.next_in = unpacked;
513 stream.avail_in = len;
514 while (deflate(&stream, Z_FINISH) == Z_OK)
515 /* nothing */;
516 deflateEnd(&stream);
517 free(unpacked);
518
519 request->buffer.buf.len = stream.total_out;
520
521 request->url = xmalloc(strlen(remote->url) +
522 strlen(request->lock->token) + 51);
523 strcpy(request->url, remote->url);
524 posn = request->url + strlen(remote->url);
525 strcpy(posn, "objects/");
526 posn += 8;
527 memcpy(posn, hex, 2);
528 posn += 2;
529 *(posn++) = '/';
530 strcpy(posn, hex + 2);
531 request->dest = xmalloc(strlen(request->url) + 14);
532 sprintf(request->dest, "Destination: %s", request->url);
533 posn += 38;
534 *(posn++) = '_';
535 strcpy(posn, request->lock->token);
536
537 slot = get_active_slot();
538 slot->callback_func = process_response;
539 slot->callback_data = request;
540 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
541 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
543 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
544 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
545 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
547 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
548 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
549
550 if (start_active_slot(slot)) {
551 request->slot = slot;
552 request->state = RUN_PUT;
553 } else {
554 request->state = ABORTED;
555 free(request->url);
556 request->url = NULL;
557 }
558 }
559
560 static void start_move(struct transfer_request *request)
561 {
562 struct active_request_slot *slot;
563 struct curl_slist *dav_headers = NULL;
564
565 slot = get_active_slot();
566 slot->callback_func = process_response;
567 slot->callback_data = request;
568 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
569 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
570 dav_headers = curl_slist_append(dav_headers, request->dest);
571 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
572 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
573 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
574 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
575
576 if (start_active_slot(slot)) {
577 request->slot = slot;
578 request->state = RUN_MOVE;
579 } else {
580 request->state = ABORTED;
581 free(request->url);
582 request->url = NULL;
583 }
584 }
585
586 static int refresh_lock(struct remote_lock *lock)
587 {
588 struct active_request_slot *slot;
589 struct slot_results results;
590 char *if_header;
591 char timeout_header[25];
592 struct curl_slist *dav_headers = NULL;
593 int rc = 0;
594
595 lock->refreshing = 1;
596
597 if_header = xmalloc(strlen(lock->token) + 25);
598 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
599 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
600 dav_headers = curl_slist_append(dav_headers, if_header);
601 dav_headers = curl_slist_append(dav_headers, timeout_header);
602
603 slot = get_active_slot();
604 slot->results = &results;
605 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
606 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
607 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
608 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
609 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
610
611 if (start_active_slot(slot)) {
612 run_active_slot(slot);
613 if (results.curl_result != CURLE_OK) {
614 fprintf(stderr, "LOCK HTTP error %ld\n",
615 results.http_code);
616 } else {
617 lock->start_time = time(NULL);
618 rc = 1;
619 }
620 }
621
622 lock->refreshing = 0;
623 curl_slist_free_all(dav_headers);
624 free(if_header);
625
626 return rc;
627 }
628
629 static void check_locks(void)
630 {
631 struct remote_lock *lock = remote->locks;
632 time_t current_time = time(NULL);
633 int time_remaining;
634
635 while (lock) {
636 time_remaining = lock->start_time + lock->timeout -
637 current_time;
638 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
639 if (!refresh_lock(lock)) {
640 fprintf(stderr,
641 "Unable to refresh lock for %s\n",
642 lock->url);
643 aborted = 1;
644 return;
645 }
646 }
647 lock = lock->next;
648 }
649 }
650
651 static void release_request(struct transfer_request *request)
652 {
653 struct transfer_request *entry = request_queue_head;
654
655 if (request == request_queue_head) {
656 request_queue_head = request->next;
657 } else {
658 while (entry->next != NULL && entry->next != request)
659 entry = entry->next;
660 if (entry->next == request)
661 entry->next = entry->next->next;
662 }
663
664 if (request->local_fileno != -1)
665 close(request->local_fileno);
666 if (request->local_stream)
667 fclose(request->local_stream);
668 free(request->url);
669 free(request);
670 }
671
672 static void finish_request(struct transfer_request *request)
673 {
674 struct stat st;
675 struct packed_git *target;
676 struct packed_git **lst;
677
678 request->curl_result = request->slot->curl_result;
679 request->http_code = request->slot->http_code;
680 request->slot = NULL;
681
682 /* Keep locks active */
683 check_locks();
684
685 if (request->headers != NULL)
686 curl_slist_free_all(request->headers);
687
688 /* URL is reused for MOVE after PUT */
689 if (request->state != RUN_PUT) {
690 free(request->url);
691 request->url = NULL;
692 }
693
694 if (request->state == RUN_MKCOL) {
695 if (request->curl_result == CURLE_OK ||
696 request->http_code == 405) {
697 remote_dir_exists[request->obj->sha1[0]] = 1;
698 start_put(request);
699 } else {
700 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
701 sha1_to_hex(request->obj->sha1),
702 request->curl_result, request->http_code);
703 request->state = ABORTED;
704 aborted = 1;
705 }
706 } else if (request->state == RUN_PUT) {
707 if (request->curl_result == CURLE_OK) {
708 start_move(request);
709 } else {
710 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
711 sha1_to_hex(request->obj->sha1),
712 request->curl_result, request->http_code);
713 request->state = ABORTED;
714 aborted = 1;
715 }
716 } else if (request->state == RUN_MOVE) {
717 if (request->curl_result == CURLE_OK) {
718 if (push_verbosely)
719 fprintf(stderr, " sent %s\n",
720 sha1_to_hex(request->obj->sha1));
721 request->obj->flags |= REMOTE;
722 release_request(request);
723 } else {
724 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_FETCH_LOOSE) {
731 fchmod(request->local_fileno, 0444);
732 close(request->local_fileno); request->local_fileno = -1;
733
734 if (request->curl_result != CURLE_OK &&
735 request->http_code != 416) {
736 if (stat(request->tmpfile, &st) == 0) {
737 if (st.st_size == 0)
738 unlink(request->tmpfile);
739 }
740 } else {
741 if (request->http_code == 416)
742 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
743
744 inflateEnd(&request->stream);
745 SHA1_Final(request->real_sha1, &request->c);
746 if (request->zret != Z_STREAM_END) {
747 unlink(request->tmpfile);
748 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
749 unlink(request->tmpfile);
750 } else {
751 request->rename =
752 move_temp_to_file(
753 request->tmpfile,
754 request->filename);
755 if (request->rename == 0) {
756 request->obj->flags |= (LOCAL | REMOTE);
757 }
758 }
759 }
760
761 /* Try fetching packed if necessary */
762 if (request->obj->flags & LOCAL)
763 release_request(request);
764 else
765 start_fetch_packed(request);
766
767 } else if (request->state == RUN_FETCH_PACKED) {
768 if (request->curl_result != CURLE_OK) {
769 fprintf(stderr, "Unable to get pack file %s\n%s",
770 request->url, curl_errorstr);
771 remote->can_update_info_refs = 0;
772 } else {
773 off_t pack_size = ftell(request->local_stream);
774
775 fclose(request->local_stream);
776 request->local_stream = NULL;
777 if (!move_temp_to_file(request->tmpfile,
778 request->filename)) {
779 target = (struct packed_git *)request->userData;
780 target->pack_size = pack_size;
781 lst = &remote->packs;
782 while (*lst != target)
783 lst = &((*lst)->next);
784 *lst = (*lst)->next;
785
786 if (!verify_pack(target))
787 install_packed_git(target);
788 else
789 remote->can_update_info_refs = 0;
790 }
791 }
792 release_request(request);
793 }
794 }
795
796 #ifdef USE_CURL_MULTI
797 static int fill_active_slot(void *unused)
798 {
799 struct transfer_request *request = request_queue_head;
800
801 if (aborted)
802 return 0;
803
804 for (request = request_queue_head; request; request = request->next) {
805 if (request->state == NEED_FETCH) {
806 start_fetch_loose(request);
807 return 1;
808 } else if (pushing && request->state == NEED_PUSH) {
809 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
810 start_put(request);
811 } else {
812 start_mkcol(request);
813 }
814 return 1;
815 }
816 }
817 return 0;
818 }
819 #endif
820
821 static void get_remote_object_list(unsigned char parent);
822
823 static void add_fetch_request(struct object *obj)
824 {
825 struct transfer_request *request;
826
827 check_locks();
828
829 /*
830 * Don't fetch the object if it's known to exist locally
831 * or is already in the request queue
832 */
833 if (remote_dir_exists[obj->sha1[0]] == -1)
834 get_remote_object_list(obj->sha1[0]);
835 if (obj->flags & (LOCAL | FETCHING))
836 return;
837
838 obj->flags |= FETCHING;
839 request = xmalloc(sizeof(*request));
840 request->obj = obj;
841 request->url = NULL;
842 request->lock = NULL;
843 request->headers = NULL;
844 request->local_fileno = -1;
845 request->local_stream = NULL;
846 request->state = NEED_FETCH;
847 request->next = request_queue_head;
848 request_queue_head = request;
849
850 #ifdef USE_CURL_MULTI
851 fill_active_slots();
852 step_active_slots();
853 #endif
854 }
855
856 static int add_send_request(struct object *obj, struct remote_lock *lock)
857 {
858 struct transfer_request *request = request_queue_head;
859 struct packed_git *target;
860
861 /* Keep locks active */
862 check_locks();
863
864 /*
865 * Don't push the object if it's known to exist on the remote
866 * or is already in the request queue
867 */
868 if (remote_dir_exists[obj->sha1[0]] == -1)
869 get_remote_object_list(obj->sha1[0]);
870 if (obj->flags & (REMOTE | PUSHING))
871 return 0;
872 target = find_sha1_pack(obj->sha1, remote->packs);
873 if (target) {
874 obj->flags |= REMOTE;
875 return 0;
876 }
877
878 obj->flags |= PUSHING;
879 request = xmalloc(sizeof(*request));
880 request->obj = obj;
881 request->url = NULL;
882 request->lock = lock;
883 request->headers = NULL;
884 request->local_fileno = -1;
885 request->local_stream = NULL;
886 request->state = NEED_PUSH;
887 request->next = request_queue_head;
888 request_queue_head = request;
889
890 #ifdef USE_CURL_MULTI
891 fill_active_slots();
892 step_active_slots();
893 #endif
894
895 return 1;
896 }
897
898 static int fetch_index(unsigned char *sha1)
899 {
900 char *hex = sha1_to_hex(sha1);
901 char *filename;
902 char *url;
903 char tmpfile[PATH_MAX];
904 long prev_posn = 0;
905 char range[RANGE_HEADER_SIZE];
906 struct curl_slist *range_header = NULL;
907
908 FILE *indexfile;
909 struct active_request_slot *slot;
910 struct slot_results results;
911
912 /* Don't use the index if the pack isn't there */
913 url = xmalloc(strlen(remote->url) + 64);
914 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
915 slot = get_active_slot();
916 slot->results = &results;
917 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
918 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
919 if (start_active_slot(slot)) {
920 run_active_slot(slot);
921 if (results.curl_result != CURLE_OK) {
922 free(url);
923 return error("Unable to verify pack %s is available",
924 hex);
925 }
926 } else {
927 free(url);
928 return error("Unable to start request");
929 }
930
931 if (has_pack_index(sha1)) {
932 free(url);
933 return 0;
934 }
935
936 if (push_verbosely)
937 fprintf(stderr, "Getting index for pack %s\n", hex);
938
939 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
940
941 filename = sha1_pack_index_name(sha1);
942 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
943 indexfile = fopen(tmpfile, "a");
944 if (!indexfile) {
945 free(url);
946 return error("Unable to open local file %s for pack index",
947 tmpfile);
948 }
949
950 slot = get_active_slot();
951 slot->results = &results;
952 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
953 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
954 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
955 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
956 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
957 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
958 slot->local = indexfile;
959
960 /* If there is data present from a previous transfer attempt,
961 resume where it left off */
962 prev_posn = ftell(indexfile);
963 if (prev_posn>0) {
964 if (push_verbosely)
965 fprintf(stderr,
966 "Resuming fetch of index for pack %s at byte %ld\n",
967 hex, prev_posn);
968 sprintf(range, "Range: bytes=%ld-", prev_posn);
969 range_header = curl_slist_append(range_header, range);
970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
971 }
972
973 if (start_active_slot(slot)) {
974 run_active_slot(slot);
975 if (results.curl_result != CURLE_OK) {
976 free(url);
977 fclose(indexfile);
978 return error("Unable to get pack index %s\n%s", url,
979 curl_errorstr);
980 }
981 } else {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to start request");
985 }
986
987 free(url);
988 fclose(indexfile);
989
990 return move_temp_to_file(tmpfile, filename);
991 }
992
993 static int setup_index(unsigned char *sha1)
994 {
995 struct packed_git *new_pack;
996
997 if (fetch_index(sha1))
998 return -1;
999
1000 new_pack = parse_pack_index(sha1);
1001 new_pack->next = remote->packs;
1002 remote->packs = new_pack;
1003 return 0;
1004 }
1005
1006 static int fetch_indices(void)
1007 {
1008 unsigned char sha1[20];
1009 char *url;
1010 struct strbuf buffer = STRBUF_INIT;
1011 char *data;
1012 int i = 0;
1013
1014 struct active_request_slot *slot;
1015 struct slot_results results;
1016
1017 if (push_verbosely)
1018 fprintf(stderr, "Getting pack list\n");
1019
1020 url = xmalloc(strlen(remote->url) + 20);
1021 sprintf(url, "%sobjects/info/packs", remote->url);
1022
1023 slot = get_active_slot();
1024 slot->results = &results;
1025 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1028 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1029 if (start_active_slot(slot)) {
1030 run_active_slot(slot);
1031 if (results.curl_result != CURLE_OK) {
1032 strbuf_release(&buffer);
1033 free(url);
1034 if (results.http_code == 404)
1035 return 0;
1036 else
1037 return error("%s", curl_errorstr);
1038 }
1039 } else {
1040 strbuf_release(&buffer);
1041 free(url);
1042 return error("Unable to start request");
1043 }
1044 free(url);
1045
1046 data = buffer.buf;
1047 while (i < buffer.len) {
1048 switch (data[i]) {
1049 case 'P':
1050 i++;
1051 if (i + 52 < buffer.len &&
1052 !prefixcmp(data + i, " pack-") &&
1053 !prefixcmp(data + i + 46, ".pack\n")) {
1054 get_sha1_hex(data + i + 6, sha1);
1055 setup_index(sha1);
1056 i += 51;
1057 break;
1058 }
1059 default:
1060 while (data[i] != '\n')
1061 i++;
1062 }
1063 i++;
1064 }
1065
1066 strbuf_release(&buffer);
1067 return 0;
1068 }
1069
1070 static void one_remote_object(const char *hex)
1071 {
1072 unsigned char sha1[20];
1073 struct object *obj;
1074
1075 if (get_sha1_hex(hex, sha1) != 0)
1076 return;
1077
1078 obj = lookup_object(sha1);
1079 if (!obj)
1080 obj = parse_object(sha1);
1081
1082 /* Ignore remote objects that don't exist locally */
1083 if (!obj)
1084 return;
1085
1086 obj->flags |= REMOTE;
1087 if (!object_list_contains(objects, obj))
1088 object_list_insert(obj, &objects);
1089 }
1090
1091 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1092 {
1093 int *lock_flags = (int *)ctx->userData;
1094
1095 if (tag_closed) {
1096 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1097 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1098 (*lock_flags & DAV_PROP_LOCKWR)) {
1099 *lock_flags |= DAV_LOCK_OK;
1100 }
1101 *lock_flags &= DAV_LOCK_OK;
1102 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1103 *lock_flags |= DAV_PROP_LOCKWR;
1104 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1105 *lock_flags |= DAV_PROP_LOCKEX;
1106 }
1107 }
1108 }
1109
1110 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1111 {
1112 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1113
1114 if (tag_closed && ctx->cdata) {
1115 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1116 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1117 strcpy(lock->owner, ctx->cdata);
1118 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1119 if (!prefixcmp(ctx->cdata, "Second-"))
1120 lock->timeout =
1121 strtol(ctx->cdata + 7, NULL, 10);
1122 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1123 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1124 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1125 strcpy(lock->token, ctx->cdata + 16);
1126 }
1127 }
1128 }
1129 }
1130
1131 static void one_remote_ref(char *refname);
1132
1133 static void
1134 xml_start_tag(void *userData, const char *name, const char **atts)
1135 {
1136 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1137 const char *c = strchr(name, ':');
1138 int new_len;
1139
1140 if (c == NULL)
1141 c = name;
1142 else
1143 c++;
1144
1145 new_len = strlen(ctx->name) + strlen(c) + 2;
1146
1147 if (new_len > ctx->len) {
1148 ctx->name = xrealloc(ctx->name, new_len);
1149 ctx->len = new_len;
1150 }
1151 strcat(ctx->name, ".");
1152 strcat(ctx->name, c);
1153
1154 free(ctx->cdata);
1155 ctx->cdata = NULL;
1156
1157 ctx->userFunc(ctx, 0);
1158 }
1159
1160 static void
1161 xml_end_tag(void *userData, const char *name)
1162 {
1163 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1164 const char *c = strchr(name, ':');
1165 char *ep;
1166
1167 ctx->userFunc(ctx, 1);
1168
1169 if (c == NULL)
1170 c = name;
1171 else
1172 c++;
1173
1174 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1175 *ep = 0;
1176 }
1177
1178 static void
1179 xml_cdata(void *userData, const XML_Char *s, int len)
1180 {
1181 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1182 free(ctx->cdata);
1183 ctx->cdata = xmemdupz(s, len);
1184 }
1185
1186 static struct remote_lock *lock_remote(const char *path, long timeout)
1187 {
1188 struct active_request_slot *slot;
1189 struct slot_results results;
1190 struct buffer out_buffer = { STRBUF_INIT, 0 };
1191 struct strbuf in_buffer = STRBUF_INIT;
1192 char *url;
1193 char *ep;
1194 char timeout_header[25];
1195 struct remote_lock *lock = NULL;
1196 struct curl_slist *dav_headers = NULL;
1197 struct xml_ctx ctx;
1198
1199 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1200 sprintf(url, "%s%s", remote->url, path);
1201
1202 /* Make sure leading directories exist for the remote ref */
1203 ep = strchr(url + strlen(remote->url) + 1, '/');
1204 while (ep) {
1205 *ep = 0;
1206 slot = get_active_slot();
1207 slot->results = &results;
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1209 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1210 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1211 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1212 if (start_active_slot(slot)) {
1213 run_active_slot(slot);
1214 if (results.curl_result != CURLE_OK &&
1215 results.http_code != 405) {
1216 fprintf(stderr,
1217 "Unable to create branch path %s\n",
1218 url);
1219 free(url);
1220 return NULL;
1221 }
1222 } else {
1223 fprintf(stderr, "Unable to start MKCOL request\n");
1224 free(url);
1225 return NULL;
1226 }
1227 *ep = '/';
1228 ep = strchr(ep + 1, '/');
1229 }
1230
1231 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232
1233 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1234 dav_headers = curl_slist_append(dav_headers, timeout_header);
1235 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1240 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1241 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1244 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1245 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1246 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1247 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248
1249 lock = xcalloc(1, sizeof(*lock));
1250 lock->timeout = -1;
1251
1252 if (start_active_slot(slot)) {
1253 run_active_slot(slot);
1254 if (results.curl_result == CURLE_OK) {
1255 XML_Parser parser = XML_ParserCreate(NULL);
1256 enum XML_Status result;
1257 ctx.name = xcalloc(10, 1);
1258 ctx.len = 0;
1259 ctx.cdata = NULL;
1260 ctx.userFunc = handle_new_lock_ctx;
1261 ctx.userData = lock;
1262 XML_SetUserData(parser, &ctx);
1263 XML_SetElementHandler(parser, xml_start_tag,
1264 xml_end_tag);
1265 XML_SetCharacterDataHandler(parser, xml_cdata);
1266 result = XML_Parse(parser, in_buffer.buf,
1267 in_buffer.len, 1);
1268 free(ctx.name);
1269 if (result != XML_STATUS_OK) {
1270 fprintf(stderr, "XML error: %s\n",
1271 XML_ErrorString(
1272 XML_GetErrorCode(parser)));
1273 lock->timeout = -1;
1274 }
1275 XML_ParserFree(parser);
1276 }
1277 } else {
1278 fprintf(stderr, "Unable to start LOCK request\n");
1279 }
1280
1281 curl_slist_free_all(dav_headers);
1282 strbuf_release(&out_buffer.buf);
1283 strbuf_release(&in_buffer);
1284
1285 if (lock->token == NULL || lock->timeout <= 0) {
1286 free(lock->token);
1287 free(lock->owner);
1288 free(url);
1289 free(lock);
1290 lock = NULL;
1291 } else {
1292 lock->url = url;
1293 lock->start_time = time(NULL);
1294 lock->next = remote->locks;
1295 remote->locks = lock;
1296 }
1297
1298 return lock;
1299 }
1300
1301 static int unlock_remote(struct remote_lock *lock)
1302 {
1303 struct active_request_slot *slot;
1304 struct slot_results results;
1305 struct remote_lock *prev = remote->locks;
1306 char *lock_token_header;
1307 struct curl_slist *dav_headers = NULL;
1308 int rc = 0;
1309
1310 lock_token_header = xmalloc(strlen(lock->token) + 31);
1311 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1312 lock->token);
1313 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1314
1315 slot = get_active_slot();
1316 slot->results = &results;
1317 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1318 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1319 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1320 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1321
1322 if (start_active_slot(slot)) {
1323 run_active_slot(slot);
1324 if (results.curl_result == CURLE_OK)
1325 rc = 1;
1326 else
1327 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1328 results.http_code);
1329 } else {
1330 fprintf(stderr, "Unable to start UNLOCK request\n");
1331 }
1332
1333 curl_slist_free_all(dav_headers);
1334 free(lock_token_header);
1335
1336 if (remote->locks == lock) {
1337 remote->locks = lock->next;
1338 } else {
1339 while (prev && prev->next != lock)
1340 prev = prev->next;
1341 if (prev)
1342 prev->next = prev->next->next;
1343 }
1344
1345 free(lock->owner);
1346 free(lock->url);
1347 free(lock->token);
1348 free(lock);
1349
1350 return rc;
1351 }
1352
1353 static void remove_locks(void)
1354 {
1355 struct remote_lock *lock = remote->locks;
1356
1357 fprintf(stderr, "Removing remote locks...\n");
1358 while (lock) {
1359 struct remote_lock *next = lock->next;
1360 unlock_remote(lock);
1361 lock = next;
1362 }
1363 }
1364
1365 static void remove_locks_on_signal(int signo)
1366 {
1367 remove_locks();
1368 signal(signo, SIG_DFL);
1369 raise(signo);
1370 }
1371
1372 static void remote_ls(const char *path, int flags,
1373 void (*userFunc)(struct remote_ls_ctx *ls),
1374 void *userData);
1375
1376 static void process_ls_object(struct remote_ls_ctx *ls)
1377 {
1378 unsigned int *parent = (unsigned int *)ls->userData;
1379 char *path = ls->dentry_name;
1380 char *obj_hex;
1381
1382 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1383 remote_dir_exists[*parent] = 1;
1384 return;
1385 }
1386
1387 if (strlen(path) != 49)
1388 return;
1389 path += 8;
1390 obj_hex = xmalloc(strlen(path));
1391 /* NB: path is not null-terminated, can not use strlcpy here */
1392 memcpy(obj_hex, path, 2);
1393 strcpy(obj_hex + 2, path + 3);
1394 one_remote_object(obj_hex);
1395 free(obj_hex);
1396 }
1397
1398 static void process_ls_ref(struct remote_ls_ctx *ls)
1399 {
1400 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1401 fprintf(stderr, " %s\n", ls->dentry_name);
1402 return;
1403 }
1404
1405 if (!(ls->dentry_flags & IS_DIR))
1406 one_remote_ref(ls->dentry_name);
1407 }
1408
1409 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1410 {
1411 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1412
1413 if (tag_closed) {
1414 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1415 if (ls->dentry_flags & IS_DIR) {
1416 if (ls->flags & PROCESS_DIRS) {
1417 ls->userFunc(ls);
1418 }
1419 if (strcmp(ls->dentry_name, ls->path) &&
1420 ls->flags & RECURSIVE) {
1421 remote_ls(ls->dentry_name,
1422 ls->flags,
1423 ls->userFunc,
1424 ls->userData);
1425 }
1426 } else if (ls->flags & PROCESS_FILES) {
1427 ls->userFunc(ls);
1428 }
1429 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1430 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1431 remote->path_len + 1);
1432 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1433 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1434 ls->dentry_flags |= IS_DIR;
1435 }
1436 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1437 free(ls->dentry_name);
1438 ls->dentry_name = NULL;
1439 ls->dentry_flags = 0;
1440 }
1441 }
1442
1443 static void remote_ls(const char *path, int flags,
1444 void (*userFunc)(struct remote_ls_ctx *ls),
1445 void *userData)
1446 {
1447 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1448 struct active_request_slot *slot;
1449 struct slot_results results;
1450 struct strbuf in_buffer = STRBUF_INIT;
1451 struct buffer out_buffer = { STRBUF_INIT, 0 };
1452 struct curl_slist *dav_headers = NULL;
1453 struct xml_ctx ctx;
1454 struct remote_ls_ctx ls;
1455
1456 ls.flags = flags;
1457 ls.path = xstrdup(path);
1458 ls.dentry_name = NULL;
1459 ls.dentry_flags = 0;
1460 ls.userData = userData;
1461 ls.userFunc = userFunc;
1462
1463 sprintf(url, "%s%s", remote->url, path);
1464
1465 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1466
1467 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1468 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1469
1470 slot = get_active_slot();
1471 slot->results = &results;
1472 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1473 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1474 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1475 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1476 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1477 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1478 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1479 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1480 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1481
1482 if (start_active_slot(slot)) {
1483 run_active_slot(slot);
1484 if (results.curl_result == CURLE_OK) {
1485 XML_Parser parser = XML_ParserCreate(NULL);
1486 enum XML_Status result;
1487 ctx.name = xcalloc(10, 1);
1488 ctx.len = 0;
1489 ctx.cdata = NULL;
1490 ctx.userFunc = handle_remote_ls_ctx;
1491 ctx.userData = &ls;
1492 XML_SetUserData(parser, &ctx);
1493 XML_SetElementHandler(parser, xml_start_tag,
1494 xml_end_tag);
1495 XML_SetCharacterDataHandler(parser, xml_cdata);
1496 result = XML_Parse(parser, in_buffer.buf,
1497 in_buffer.len, 1);
1498 free(ctx.name);
1499
1500 if (result != XML_STATUS_OK) {
1501 fprintf(stderr, "XML error: %s\n",
1502 XML_ErrorString(
1503 XML_GetErrorCode(parser)));
1504 }
1505 XML_ParserFree(parser);
1506 }
1507 } else {
1508 fprintf(stderr, "Unable to start PROPFIND request\n");
1509 }
1510
1511 free(ls.path);
1512 free(url);
1513 strbuf_release(&out_buffer.buf);
1514 strbuf_release(&in_buffer);
1515 curl_slist_free_all(dav_headers);
1516 }
1517
1518 static void get_remote_object_list(unsigned char parent)
1519 {
1520 char path[] = "objects/XX/";
1521 static const char hex[] = "0123456789abcdef";
1522 unsigned int val = parent;
1523
1524 path[8] = hex[val >> 4];
1525 path[9] = hex[val & 0xf];
1526 remote_dir_exists[val] = 0;
1527 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1528 process_ls_object, &val);
1529 }
1530
1531 static int locking_available(void)
1532 {
1533 struct active_request_slot *slot;
1534 struct slot_results results;
1535 struct strbuf in_buffer = STRBUF_INIT;
1536 struct buffer out_buffer = { STRBUF_INIT, 0 };
1537 struct curl_slist *dav_headers = NULL;
1538 struct xml_ctx ctx;
1539 int lock_flags = 0;
1540
1541 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1542
1543 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1544 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1545
1546 slot = get_active_slot();
1547 slot->results = &results;
1548 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1549 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1550 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1551 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1552 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1553 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1554 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1555 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1556 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1557
1558 if (start_active_slot(slot)) {
1559 run_active_slot(slot);
1560 if (results.curl_result == CURLE_OK) {
1561 XML_Parser parser = XML_ParserCreate(NULL);
1562 enum XML_Status result;
1563 ctx.name = xcalloc(10, 1);
1564 ctx.len = 0;
1565 ctx.cdata = NULL;
1566 ctx.userFunc = handle_lockprop_ctx;
1567 ctx.userData = &lock_flags;
1568 XML_SetUserData(parser, &ctx);
1569 XML_SetElementHandler(parser, xml_start_tag,
1570 xml_end_tag);
1571 result = XML_Parse(parser, in_buffer.buf,
1572 in_buffer.len, 1);
1573 free(ctx.name);
1574
1575 if (result != XML_STATUS_OK) {
1576 fprintf(stderr, "XML error: %s\n",
1577 XML_ErrorString(
1578 XML_GetErrorCode(parser)));
1579 lock_flags = 0;
1580 }
1581 XML_ParserFree(parser);
1582 if (!lock_flags)
1583 error("Error: no DAV locking support on %s",
1584 remote->url);
1585
1586 } else {
1587 error("Cannot access URL %s, return code %d",
1588 remote->url, results.curl_result);
1589 lock_flags = 0;
1590 }
1591 } else {
1592 error("Unable to start PROPFIND request on %s", remote->url);
1593 }
1594
1595 strbuf_release(&out_buffer.buf);
1596 strbuf_release(&in_buffer);
1597 curl_slist_free_all(dav_headers);
1598
1599 return lock_flags;
1600 }
1601
1602 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1603 {
1604 struct object_list *entry = xmalloc(sizeof(struct object_list));
1605 entry->item = obj;
1606 entry->next = *p;
1607 *p = entry;
1608 return &entry->next;
1609 }
1610
1611 static struct object_list **process_blob(struct blob *blob,
1612 struct object_list **p,
1613 struct name_path *path,
1614 const char *name)
1615 {
1616 struct object *obj = &blob->object;
1617
1618 obj->flags |= LOCAL;
1619
1620 if (obj->flags & (UNINTERESTING | SEEN))
1621 return p;
1622
1623 obj->flags |= SEEN;
1624 return add_one_object(obj, p);
1625 }
1626
1627 static struct object_list **process_tree(struct tree *tree,
1628 struct object_list **p,
1629 struct name_path *path,
1630 const char *name)
1631 {
1632 struct object *obj = &tree->object;
1633 struct tree_desc desc;
1634 struct name_entry entry;
1635 struct name_path me;
1636
1637 obj->flags |= LOCAL;
1638
1639 if (obj->flags & (UNINTERESTING | SEEN))
1640 return p;
1641 if (parse_tree(tree) < 0)
1642 die("bad tree object %s", sha1_to_hex(obj->sha1));
1643
1644 obj->flags |= SEEN;
1645 name = xstrdup(name);
1646 p = add_one_object(obj, p);
1647 me.up = path;
1648 me.elem = name;
1649 me.elem_len = strlen(name);
1650
1651 init_tree_desc(&desc, tree->buffer, tree->size);
1652
1653 while (tree_entry(&desc, &entry))
1654 switch (object_type(entry.mode)) {
1655 case OBJ_TREE:
1656 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1657 break;
1658 case OBJ_BLOB:
1659 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1660 break;
1661 default:
1662 /* Subproject commit - not in this repository */
1663 break;
1664 }
1665
1666 free(tree->buffer);
1667 tree->buffer = NULL;
1668 return p;
1669 }
1670
1671 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1672 {
1673 int i;
1674 struct commit *commit;
1675 struct object_list **p = &objects;
1676 int count = 0;
1677
1678 while ((commit = get_revision(revs)) != NULL) {
1679 p = process_tree(commit->tree, p, NULL, "");
1680 commit->object.flags |= LOCAL;
1681 if (!(commit->object.flags & UNINTERESTING))
1682 count += add_send_request(&commit->object, lock);
1683 }
1684
1685 for (i = 0; i < revs->pending.nr; i++) {
1686 struct object_array_entry *entry = revs->pending.objects + i;
1687 struct object *obj = entry->item;
1688 const char *name = entry->name;
1689
1690 if (obj->flags & (UNINTERESTING | SEEN))
1691 continue;
1692 if (obj->type == OBJ_TAG) {
1693 obj->flags |= SEEN;
1694 p = add_one_object(obj, p);
1695 continue;
1696 }
1697 if (obj->type == OBJ_TREE) {
1698 p = process_tree((struct tree *)obj, p, NULL, name);
1699 continue;
1700 }
1701 if (obj->type == OBJ_BLOB) {
1702 p = process_blob((struct blob *)obj, p, NULL, name);
1703 continue;
1704 }
1705 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1706 }
1707
1708 while (objects) {
1709 if (!(objects->item->flags & UNINTERESTING))
1710 count += add_send_request(objects->item, lock);
1711 objects = objects->next;
1712 }
1713
1714 return count;
1715 }
1716
1717 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1718 {
1719 struct active_request_slot *slot;
1720 struct slot_results results;
1721 char *if_header;
1722 struct buffer out_buffer = { STRBUF_INIT, 0 };
1723 struct curl_slist *dav_headers = NULL;
1724
1725 if_header = xmalloc(strlen(lock->token) + 25);
1726 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1727 dav_headers = curl_slist_append(dav_headers, if_header);
1728
1729 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1730
1731 slot = get_active_slot();
1732 slot->results = &results;
1733 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1734 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1735 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1736 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1737 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1738 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1739 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1740 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1741 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1742
1743 if (start_active_slot(slot)) {
1744 run_active_slot(slot);
1745 strbuf_release(&out_buffer.buf);
1746 free(if_header);
1747 if (results.curl_result != CURLE_OK) {
1748 fprintf(stderr,
1749 "PUT error: curl result=%d, HTTP code=%ld\n",
1750 results.curl_result, results.http_code);
1751 /* We should attempt recovery? */
1752 return 0;
1753 }
1754 } else {
1755 strbuf_release(&out_buffer.buf);
1756 free(if_header);
1757 fprintf(stderr, "Unable to start PUT request\n");
1758 return 0;
1759 }
1760
1761 return 1;
1762 }
1763
1764 static struct ref *local_refs, **local_tail;
1765 static struct ref *remote_refs, **remote_tail;
1766
1767 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1768 {
1769 struct ref *ref;
1770 int len = strlen(refname) + 1;
1771 ref = xcalloc(1, sizeof(*ref) + len);
1772 hashcpy(ref->new_sha1, sha1);
1773 memcpy(ref->name, refname, len);
1774 *local_tail = ref;
1775 local_tail = &ref->next;
1776 return 0;
1777 }
1778
1779 static void one_remote_ref(char *refname)
1780 {
1781 struct ref *ref;
1782 struct object *obj;
1783
1784 ref = alloc_ref_from_str(refname);
1785
1786 if (http_fetch_ref(remote->url, ref) != 0) {
1787 fprintf(stderr,
1788 "Unable to fetch ref %s from %s\n",
1789 refname, remote->url);
1790 free(ref);
1791 return;
1792 }
1793
1794 /*
1795 * Fetch a copy of the object if it doesn't exist locally - it
1796 * may be required for updating server info later.
1797 */
1798 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1799 obj = lookup_unknown_object(ref->old_sha1);
1800 if (obj) {
1801 fprintf(stderr, " fetch %s for %s\n",
1802 sha1_to_hex(ref->old_sha1), refname);
1803 add_fetch_request(obj);
1804 }
1805 }
1806
1807 *remote_tail = ref;
1808 remote_tail = &ref->next;
1809 }
1810
1811 static void get_local_heads(void)
1812 {
1813 local_tail = &local_refs;
1814 for_each_ref(one_local_ref, NULL);
1815 }
1816
1817 static void get_dav_remote_heads(void)
1818 {
1819 remote_tail = &remote_refs;
1820 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1821 }
1822
1823 static int is_zero_sha1(const unsigned char *sha1)
1824 {
1825 int i;
1826
1827 for (i = 0; i < 20; i++) {
1828 if (*sha1++)
1829 return 0;
1830 }
1831 return 1;
1832 }
1833
1834 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1835 {
1836 while (list) {
1837 struct commit_list *temp = list;
1838 temp->item->object.flags &= ~mark;
1839 list = temp->next;
1840 free(temp);
1841 }
1842 }
1843
1844 static int ref_newer(const unsigned char *new_sha1,
1845 const unsigned char *old_sha1)
1846 {
1847 struct object *o;
1848 struct commit *old, *new;
1849 struct commit_list *list, *used;
1850 int found = 0;
1851
1852 /* Both new and old must be commit-ish and new is descendant of
1853 * old. Otherwise we require --force.
1854 */
1855 o = deref_tag(parse_object(old_sha1), NULL, 0);
1856 if (!o || o->type != OBJ_COMMIT)
1857 return 0;
1858 old = (struct commit *) o;
1859
1860 o = deref_tag(parse_object(new_sha1), NULL, 0);
1861 if (!o || o->type != OBJ_COMMIT)
1862 return 0;
1863 new = (struct commit *) o;
1864
1865 if (parse_commit(new) < 0)
1866 return 0;
1867
1868 used = list = NULL;
1869 commit_list_insert(new, &list);
1870 while (list) {
1871 new = pop_most_recent_commit(&list, TMP_MARK);
1872 commit_list_insert(new, &used);
1873 if (new == old) {
1874 found = 1;
1875 break;
1876 }
1877 }
1878 unmark_and_free(list, TMP_MARK);
1879 unmark_and_free(used, TMP_MARK);
1880 return found;
1881 }
1882
1883 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1884 {
1885 struct strbuf *buf = (struct strbuf *)ls->userData;
1886 struct object *o;
1887 int len;
1888 char *ref_info;
1889 struct ref *ref;
1890
1891 ref = alloc_ref_from_str(ls->dentry_name);
1892
1893 if (http_fetch_ref(remote->url, ref) != 0) {
1894 fprintf(stderr,
1895 "Unable to fetch ref %s from %s\n",
1896 ls->dentry_name, remote->url);
1897 aborted = 1;
1898 free(ref);
1899 return;
1900 }
1901
1902 o = parse_object(ref->old_sha1);
1903 if (!o) {
1904 fprintf(stderr,
1905 "Unable to parse object %s for remote ref %s\n",
1906 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1907 aborted = 1;
1908 free(ref);
1909 return;
1910 }
1911
1912 len = strlen(ls->dentry_name) + 42;
1913 ref_info = xcalloc(len + 1, 1);
1914 sprintf(ref_info, "%s %s\n",
1915 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1916 fwrite_buffer(ref_info, 1, len, buf);
1917 free(ref_info);
1918
1919 if (o->type == OBJ_TAG) {
1920 o = deref_tag(o, ls->dentry_name, 0);
1921 if (o) {
1922 len = strlen(ls->dentry_name) + 45;
1923 ref_info = xcalloc(len + 1, 1);
1924 sprintf(ref_info, "%s %s^{}\n",
1925 sha1_to_hex(o->sha1), ls->dentry_name);
1926 fwrite_buffer(ref_info, 1, len, buf);
1927 free(ref_info);
1928 }
1929 }
1930 free(ref);
1931 }
1932
1933 static void update_remote_info_refs(struct remote_lock *lock)
1934 {
1935 struct buffer buffer = { STRBUF_INIT, 0 };
1936 struct active_request_slot *slot;
1937 struct slot_results results;
1938 char *if_header;
1939 struct curl_slist *dav_headers = NULL;
1940
1941 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1942 add_remote_info_ref, &buffer.buf);
1943 if (!aborted) {
1944 if_header = xmalloc(strlen(lock->token) + 25);
1945 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1946 dav_headers = curl_slist_append(dav_headers, if_header);
1947
1948 slot = get_active_slot();
1949 slot->results = &results;
1950 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1951 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1952 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1953 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1954 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1955 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1956 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1957 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1958 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1959
1960 if (start_active_slot(slot)) {
1961 run_active_slot(slot);
1962 if (results.curl_result != CURLE_OK) {
1963 fprintf(stderr,
1964 "PUT error: curl result=%d, HTTP code=%ld\n",
1965 results.curl_result, results.http_code);
1966 }
1967 }
1968 free(if_header);
1969 }
1970 strbuf_release(&buffer.buf);
1971 }
1972
1973 static int remote_exists(const char *path)
1974 {
1975 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1976 struct active_request_slot *slot;
1977 struct slot_results results;
1978 int ret = -1;
1979
1980 sprintf(url, "%s%s", remote->url, path);
1981
1982 slot = get_active_slot();
1983 slot->results = &results;
1984 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1985 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1986
1987 if (start_active_slot(slot)) {
1988 run_active_slot(slot);
1989 if (results.http_code == 404)
1990 ret = 0;
1991 else if (results.curl_result == CURLE_OK)
1992 ret = 1;
1993 else
1994 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1995 } else {
1996 fprintf(stderr, "Unable to start HEAD request\n");
1997 }
1998
1999 free(url);
2000 return ret;
2001 }
2002
2003 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2004 {
2005 char *url;
2006 struct strbuf buffer = STRBUF_INIT;
2007 struct active_request_slot *slot;
2008 struct slot_results results;
2009
2010 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2011 sprintf(url, "%s%s", remote->url, path);
2012
2013 slot = get_active_slot();
2014 slot->results = &results;
2015 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2016 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2017 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2018 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2019 if (start_active_slot(slot)) {
2020 run_active_slot(slot);
2021 if (results.curl_result != CURLE_OK) {
2022 die("Couldn't get %s for remote symref\n%s",
2023 url, curl_errorstr);
2024 }
2025 } else {
2026 die("Unable to start remote symref request");
2027 }
2028 free(url);
2029
2030 free(*symref);
2031 *symref = NULL;
2032 hashclr(sha1);
2033
2034 if (buffer.len == 0)
2035 return;
2036
2037 /* If it's a symref, set the refname; otherwise try for a sha1 */
2038 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2039 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2040 } else {
2041 get_sha1_hex(buffer.buf, sha1);
2042 }
2043
2044 strbuf_release(&buffer);
2045 }
2046
2047 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2048 {
2049 struct commit *head = lookup_commit(head_sha1);
2050 struct commit *branch = lookup_commit(branch_sha1);
2051 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2052
2053 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2054 }
2055
2056 static int delete_remote_branch(char *pattern, int force)
2057 {
2058 struct ref *refs = remote_refs;
2059 struct ref *remote_ref = NULL;
2060 unsigned char head_sha1[20];
2061 char *symref = NULL;
2062 int match;
2063 int patlen = strlen(pattern);
2064 int i;
2065 struct active_request_slot *slot;
2066 struct slot_results results;
2067 char *url;
2068
2069 /* Find the remote branch(es) matching the specified branch name */
2070 for (match = 0; refs; refs = refs->next) {
2071 char *name = refs->name;
2072 int namelen = strlen(name);
2073 if (namelen < patlen ||
2074 memcmp(name + namelen - patlen, pattern, patlen))
2075 continue;
2076 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2077 continue;
2078 match++;
2079 remote_ref = refs;
2080 }
2081 if (match == 0)
2082 return error("No remote branch matches %s", pattern);
2083 if (match != 1)
2084 return error("More than one remote branch matches %s",
2085 pattern);
2086
2087 /*
2088 * Remote HEAD must be a symref (not exactly foolproof; a remote
2089 * symlink to a symref will look like a symref)
2090 */
2091 fetch_symref("HEAD", &symref, head_sha1);
2092 if (!symref)
2093 return error("Remote HEAD is not a symref");
2094
2095 /* Remote branch must not be the remote HEAD */
2096 for (i=0; symref && i<MAXDEPTH; i++) {
2097 if (!strcmp(remote_ref->name, symref))
2098 return error("Remote branch %s is the current HEAD",
2099 remote_ref->name);
2100 fetch_symref(symref, &symref, head_sha1);
2101 }
2102
2103 /* Run extra sanity checks if delete is not forced */
2104 if (!force) {
2105 /* Remote HEAD must resolve to a known object */
2106 if (symref)
2107 return error("Remote HEAD symrefs too deep");
2108 if (is_zero_sha1(head_sha1))
2109 return error("Unable to resolve remote HEAD");
2110 if (!has_sha1_file(head_sha1))
2111 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2112
2113 /* Remote branch must resolve to a known object */
2114 if (is_zero_sha1(remote_ref->old_sha1))
2115 return error("Unable to resolve remote branch %s",
2116 remote_ref->name);
2117 if (!has_sha1_file(remote_ref->old_sha1))
2118 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));
2119
2120 /* Remote branch must be an ancestor of remote HEAD */
2121 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2122 return error("The branch '%s' is not an ancestor "
2123 "of your current HEAD.\n"
2124 "If you are sure you want to delete it,"
2125 " run:\n\t'git http-push -D %s %s'",
2126 remote_ref->name, remote->url, pattern);
2127 }
2128 }
2129
2130 /* Send delete request */
2131 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2132 if (dry_run)
2133 return 0;
2134 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2135 sprintf(url, "%s%s", remote->url, remote_ref->name);
2136 slot = get_active_slot();
2137 slot->results = &results;
2138 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2139 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2140 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2141 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2142 if (start_active_slot(slot)) {
2143 run_active_slot(slot);
2144 free(url);
2145 if (results.curl_result != CURLE_OK)
2146 return error("DELETE request failed (%d/%ld)\n",
2147 results.curl_result, results.http_code);
2148 } else {
2149 free(url);
2150 return error("Unable to start DELETE request");
2151 }
2152
2153 return 0;
2154 }
2155
2156 int main(int argc, char **argv)
2157 {
2158 struct transfer_request *request;
2159 struct transfer_request *next_request;
2160 int nr_refspec = 0;
2161 char **refspec = NULL;
2162 struct remote_lock *ref_lock = NULL;
2163 struct remote_lock *info_ref_lock = NULL;
2164 struct rev_info revs;
2165 int delete_branch = 0;
2166 int force_delete = 0;
2167 int objects_to_send;
2168 int rc = 0;
2169 int i;
2170 int new_refs;
2171 struct ref *ref;
2172 char *rewritten_url = NULL;
2173
2174 setup_git_directory();
2175
2176 remote = xcalloc(sizeof(*remote), 1);
2177
2178 argv++;
2179 for (i = 1; i < argc; i++, argv++) {
2180 char *arg = *argv;
2181
2182 if (*arg == '-') {
2183 if (!strcmp(arg, "--all")) {
2184 push_all = MATCH_REFS_ALL;
2185 continue;
2186 }
2187 if (!strcmp(arg, "--force")) {
2188 force_all = 1;
2189 continue;
2190 }
2191 if (!strcmp(arg, "--dry-run")) {
2192 dry_run = 1;
2193 continue;
2194 }
2195 if (!strcmp(arg, "--verbose")) {
2196 push_verbosely = 1;
2197 continue;
2198 }
2199 if (!strcmp(arg, "-d")) {
2200 delete_branch = 1;
2201 continue;
2202 }
2203 if (!strcmp(arg, "-D")) {
2204 delete_branch = 1;
2205 force_delete = 1;
2206 continue;
2207 }
2208 }
2209 if (!remote->url) {
2210 char *path = strstr(arg, "//");
2211 remote->url = arg;
2212 if (path) {
2213 path = strchr(path+2, '/');
2214 if (path)
2215 remote->path_len = strlen(path);
2216 }
2217 continue;
2218 }
2219 refspec = argv;
2220 nr_refspec = argc - i;
2221 break;
2222 }
2223
2224 #ifndef USE_CURL_MULTI
2225 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2226 #endif
2227
2228 if (!remote->url)
2229 usage(http_push_usage);
2230
2231 if (delete_branch && nr_refspec != 1)
2232 die("You must specify only one branch name when deleting a remote branch");
2233
2234 memset(remote_dir_exists, -1, 256);
2235
2236 http_init(NULL);
2237
2238 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2239
2240 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2241 rewritten_url = malloc(strlen(remote->url)+2);
2242 strcpy(rewritten_url, remote->url);
2243 strcat(rewritten_url, "/");
2244 remote->url = rewritten_url;
2245 ++remote->path_len;
2246 }
2247
2248 /* Verify DAV compliance/lock support */
2249 if (!locking_available()) {
2250 rc = 1;
2251 goto cleanup;
2252 }
2253
2254 signal(SIGINT, remove_locks_on_signal);
2255 signal(SIGHUP, remove_locks_on_signal);
2256 signal(SIGQUIT, remove_locks_on_signal);
2257 signal(SIGTERM, remove_locks_on_signal);
2258
2259 /* Check whether the remote has server info files */
2260 remote->can_update_info_refs = 0;
2261 remote->has_info_refs = remote_exists("info/refs");
2262 remote->has_info_packs = remote_exists("objects/info/packs");
2263 if (remote->has_info_refs) {
2264 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2265 if (info_ref_lock)
2266 remote->can_update_info_refs = 1;
2267 else {
2268 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2269 rc = 1;
2270 goto cleanup;
2271 }
2272 }
2273 if (remote->has_info_packs)
2274 fetch_indices();
2275
2276 /* Get a list of all local and remote heads to validate refspecs */
2277 get_local_heads();
2278 fprintf(stderr, "Fetching remote heads...\n");
2279 get_dav_remote_heads();
2280
2281 /* Remove a remote branch if -d or -D was specified */
2282 if (delete_branch) {
2283 if (delete_remote_branch(refspec[0], force_delete) == -1)
2284 fprintf(stderr, "Unable to delete remote branch %s\n",
2285 refspec[0]);
2286 goto cleanup;
2287 }
2288
2289 /* match them up */
2290 if (!remote_tail)
2291 remote_tail = &remote_refs;
2292 if (match_refs(local_refs, remote_refs, &remote_tail,
2293 nr_refspec, (const char **) refspec, push_all)) {
2294 rc = -1;
2295 goto cleanup;
2296 }
2297 if (!remote_refs) {
2298 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2299 rc = 0;
2300 goto cleanup;
2301 }
2302
2303 new_refs = 0;
2304 for (ref = remote_refs; ref; ref = ref->next) {
2305 char old_hex[60], *new_hex;
2306 const char *commit_argv[4];
2307 int commit_argc;
2308 char *new_sha1_hex, *old_sha1_hex;
2309
2310 if (!ref->peer_ref)
2311 continue;
2312
2313 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2314 if (delete_remote_branch(ref->name, 1) == -1) {
2315 error("Could not remove %s", ref->name);
2316 rc = -4;
2317 }
2318 new_refs++;
2319 continue;
2320 }
2321
2322 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2323 if (push_verbosely || 1)
2324 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2325 continue;
2326 }
2327
2328 if (!force_all &&
2329 !is_zero_sha1(ref->old_sha1) &&
2330 !ref->force) {
2331 if (!has_sha1_file(ref->old_sha1) ||
2332 !ref_newer(ref->peer_ref->new_sha1,
2333 ref->old_sha1)) {
2334 /*
2335 * We do not have the remote ref, or
2336 * we know that the remote ref is not
2337 * an ancestor of what we are trying to
2338 * push. Either way this can be losing
2339 * commits at the remote end and likely
2340 * we were not up to date to begin with.
2341 */
2342 error("remote '%s' is not an ancestor of\n"
2343 "local '%s'.\n"
2344 "Maybe you are not up-to-date and "
2345 "need to pull first?",
2346 ref->name,
2347 ref->peer_ref->name);
2348 rc = -2;
2349 continue;
2350 }
2351 }
2352 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2353 new_refs++;
2354 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2355 new_hex = sha1_to_hex(ref->new_sha1);
2356
2357 fprintf(stderr, "updating '%s'", ref->name);
2358 if (strcmp(ref->name, ref->peer_ref->name))
2359 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2360 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2361 if (dry_run)
2362 continue;
2363
2364 /* Lock remote branch ref */
2365 ref_lock = lock_remote(ref->name, LOCK_TIME);
2366 if (ref_lock == NULL) {
2367 fprintf(stderr, "Unable to lock remote branch %s\n",
2368 ref->name);
2369 rc = 1;
2370 continue;
2371 }
2372
2373 /* Set up revision info for this refspec */
2374 commit_argc = 3;
2375 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2376 old_sha1_hex = NULL;
2377 commit_argv[1] = "--objects";
2378 commit_argv[2] = new_sha1_hex;
2379 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2380 old_sha1_hex = xmalloc(42);
2381 sprintf(old_sha1_hex, "^%s",
2382 sha1_to_hex(ref->old_sha1));
2383 commit_argv[3] = old_sha1_hex;
2384 commit_argc++;
2385 }
2386 init_revisions(&revs, setup_git_directory());
2387 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2388 revs.edge_hint = 0; /* just in case */
2389 free(new_sha1_hex);
2390 if (old_sha1_hex) {
2391 free(old_sha1_hex);
2392 commit_argv[1] = NULL;
2393 }
2394
2395 /* Generate a list of objects that need to be pushed */
2396 pushing = 0;
2397 if (prepare_revision_walk(&revs))
2398 die("revision walk setup failed");
2399 mark_edges_uninteresting(revs.commits, &revs, NULL);
2400 objects_to_send = get_delta(&revs, ref_lock);
2401 finish_all_active_slots();
2402
2403 /* Push missing objects to remote, this would be a
2404 convenient time to pack them first if appropriate. */
2405 pushing = 1;
2406 if (objects_to_send)
2407 fprintf(stderr, " sending %d objects\n",
2408 objects_to_send);
2409 #ifdef USE_CURL_MULTI
2410 fill_active_slots();
2411 add_fill_function(NULL, fill_active_slot);
2412 #endif
2413 do {
2414 finish_all_active_slots();
2415 #ifdef USE_CURL_MULTI
2416 fill_active_slots();
2417 #endif
2418 } while (request_queue_head && !aborted);
2419
2420 /* Update the remote branch if all went well */
2421 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2422 rc = 1;
2423
2424 if (!rc)
2425 fprintf(stderr, " done\n");
2426 unlock_remote(ref_lock);
2427 check_locks();
2428 }
2429
2430 /* Update remote server info if appropriate */
2431 if (remote->has_info_refs && new_refs) {
2432 if (info_ref_lock && remote->can_update_info_refs) {
2433 fprintf(stderr, "Updating remote server info\n");
2434 if (!dry_run)
2435 update_remote_info_refs(info_ref_lock);
2436 } else {
2437 fprintf(stderr, "Unable to update server info\n");
2438 }
2439 }
2440
2441 cleanup:
2442 free(rewritten_url);
2443 if (info_ref_lock)
2444 unlock_remote(info_ref_lock);
2445 free(remote);
2446
2447 curl_slist_free_all(no_pragma_header);
2448
2449 http_cleanup();
2450
2451 request = request_queue_head;
2452 while (request != NULL) {
2453 next_request = request->next;
2454 release_request(request);
2455 request = next_request;
2456 }
2457
2458 return rc;
2459 }
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