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mergetool: Add support for Apple Mac OS X's opendiff command
[git.git] / http-push.c
blob724720c562ab6da2b02e91b69f5365bc7bfee4f4
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "fetch.h"
5 #include "tag.h"
6 #include "blob.h"
7 #include "http.h"
8 #include "refs.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "exec_cmd.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78 static struct curl_slist *default_headers;
79
80 static int push_verbosely;
81 static int push_all;
82 static int force_all;
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, SEEK_SET, 0);
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 filename);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 request->buffer.buffer = xmalloc(size);
498
499 /* Compress it */
500 stream.next_out = request->buffer.buffer;
501 stream.avail_out = size;
502
503 /* First header.. */
504 stream.next_in = (void *)hdr;
505 stream.avail_in = hdrlen;
506 while (deflate(&stream, 0) == Z_OK)
507 /* nothing */;
508
509 /* Then the data itself.. */
510 stream.next_in = unpacked;
511 stream.avail_in = len;
512 while (deflate(&stream, Z_FINISH) == Z_OK)
513 /* nothing */;
514 deflateEnd(&stream);
515 free(unpacked);
516
517 request->buffer.size = stream.total_out;
518 request->buffer.posn = 0;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 if (request->url != NULL)
668 free(request->url);
669 free(request);
670 }
671
672 static void finish_request(struct transfer_request *request)
673 {
674 struct stat st;
675 struct packed_git *target;
676 struct packed_git **lst;
677
678 request->curl_result = request->slot->curl_result;
679 request->http_code = request->slot->http_code;
680 request->slot = NULL;
681
682 /* Keep locks active */
683 check_locks();
684
685 if (request->headers != NULL)
686 curl_slist_free_all(request->headers);
687
688 /* URL is reused for MOVE after PUT */
689 if (request->state != RUN_PUT) {
690 free(request->url);
691 request->url = NULL;
692 }
693
694 if (request->state == RUN_MKCOL) {
695 if (request->curl_result == CURLE_OK ||
696 request->http_code == 405) {
697 remote_dir_exists[request->obj->sha1[0]] = 1;
698 start_put(request);
699 } else {
700 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
701 sha1_to_hex(request->obj->sha1),
702 request->curl_result, request->http_code);
703 request->state = ABORTED;
704 aborted = 1;
705 }
706 } else if (request->state == RUN_PUT) {
707 if (request->curl_result == CURLE_OK) {
708 start_move(request);
709 } else {
710 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
711 sha1_to_hex(request->obj->sha1),
712 request->curl_result, request->http_code);
713 request->state = ABORTED;
714 aborted = 1;
715 }
716 } else if (request->state == RUN_MOVE) {
717 if (request->curl_result == CURLE_OK) {
718 if (push_verbosely)
719 fprintf(stderr, " sent %s\n",
720 sha1_to_hex(request->obj->sha1));
721 request->obj->flags |= REMOTE;
722 release_request(request);
723 } else {
724 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_FETCH_LOOSE) {
731 fchmod(request->local_fileno, 0444);
732 close(request->local_fileno); request->local_fileno = -1;
733
734 if (request->curl_result != CURLE_OK &&
735 request->http_code != 416) {
736 if (stat(request->tmpfile, &st) == 0) {
737 if (st.st_size == 0)
738 unlink(request->tmpfile);
739 }
740 } else {
741 if (request->http_code == 416)
742 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
743
744 inflateEnd(&request->stream);
745 SHA1_Final(request->real_sha1, &request->c);
746 if (request->zret != Z_STREAM_END) {
747 unlink(request->tmpfile);
748 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
749 unlink(request->tmpfile);
750 } else {
751 request->rename =
752 move_temp_to_file(
753 request->tmpfile,
754 request->filename);
755 if (request->rename == 0) {
756 request->obj->flags |= (LOCAL | REMOTE);
757 }
758 }
759 }
760
761 /* Try fetching packed if necessary */
762 if (request->obj->flags & LOCAL)
763 release_request(request);
764 else
765 start_fetch_packed(request);
766
767 } else if (request->state == RUN_FETCH_PACKED) {
768 if (request->curl_result != CURLE_OK) {
769 fprintf(stderr, "Unable to get pack file %s\n%s",
770 request->url, curl_errorstr);
771 remote->can_update_info_refs = 0;
772 } else {
773 off_t pack_size = ftell(request->local_stream);
774
775 fclose(request->local_stream);
776 request->local_stream = NULL;
777 if (!move_temp_to_file(request->tmpfile,
778 request->filename)) {
779 target = (struct packed_git *)request->userData;
780 target->pack_size = pack_size;
781 lst = &remote->packs;
782 while (*lst != target)
783 lst = &((*lst)->next);
784 *lst = (*lst)->next;
785
786 if (!verify_pack(target, 0))
787 install_packed_git(target);
788 else
789 remote->can_update_info_refs = 0;
790 }
791 }
792 release_request(request);
793 }
794 }
795
796 #ifdef USE_CURL_MULTI
797 void fill_active_slots(void)
798 {
799 struct transfer_request *request = request_queue_head;
800 struct transfer_request *next;
801 struct active_request_slot *slot = active_queue_head;
802 int num_transfers;
803
804 if (aborted)
805 return;
806
807 while (active_requests < max_requests && request != NULL) {
808 next = request->next;
809 if (request->state == NEED_FETCH) {
810 start_fetch_loose(request);
811 } else if (pushing && request->state == NEED_PUSH) {
812 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
813 start_put(request);
814 } else {
815 start_mkcol(request);
816 }
817 curl_multi_perform(curlm, &num_transfers);
818 }
819 request = next;
820 }
821
822 while (slot != NULL) {
823 if (!slot->in_use && slot->curl != NULL) {
824 curl_easy_cleanup(slot->curl);
825 slot->curl = NULL;
826 }
827 slot = slot->next;
828 }
829 }
830 #endif
831
832 static void get_remote_object_list(unsigned char parent);
833
834 static void add_fetch_request(struct object *obj)
835 {
836 struct transfer_request *request;
837
838 check_locks();
839
840 /*
841 * Don't fetch the object if it's known to exist locally
842 * or is already in the request queue
843 */
844 if (remote_dir_exists[obj->sha1[0]] == -1)
845 get_remote_object_list(obj->sha1[0]);
846 if (obj->flags & (LOCAL | FETCHING))
847 return;
848
849 obj->flags |= FETCHING;
850 request = xmalloc(sizeof(*request));
851 request->obj = obj;
852 request->url = NULL;
853 request->lock = NULL;
854 request->headers = NULL;
855 request->local_fileno = -1;
856 request->local_stream = NULL;
857 request->state = NEED_FETCH;
858 request->next = request_queue_head;
859 request_queue_head = request;
860
861 #ifdef USE_CURL_MULTI
862 fill_active_slots();
863 step_active_slots();
864 #endif
865 }
866
867 static int add_send_request(struct object *obj, struct remote_lock *lock)
868 {
869 struct transfer_request *request = request_queue_head;
870 struct packed_git *target;
871
872 /* Keep locks active */
873 check_locks();
874
875 /*
876 * Don't push the object if it's known to exist on the remote
877 * or is already in the request queue
878 */
879 if (remote_dir_exists[obj->sha1[0]] == -1)
880 get_remote_object_list(obj->sha1[0]);
881 if (obj->flags & (REMOTE | PUSHING))
882 return 0;
883 target = find_sha1_pack(obj->sha1, remote->packs);
884 if (target) {
885 obj->flags |= REMOTE;
886 return 0;
887 }
888
889 obj->flags |= PUSHING;
890 request = xmalloc(sizeof(*request));
891 request->obj = obj;
892 request->url = NULL;
893 request->lock = lock;
894 request->headers = NULL;
895 request->local_fileno = -1;
896 request->local_stream = NULL;
897 request->state = NEED_PUSH;
898 request->next = request_queue_head;
899 request_queue_head = request;
900
901 #ifdef USE_CURL_MULTI
902 fill_active_slots();
903 step_active_slots();
904 #endif
905
906 return 1;
907 }
908
909 static int fetch_index(unsigned char *sha1)
910 {
911 char *hex = sha1_to_hex(sha1);
912 char *filename;
913 char *url;
914 char tmpfile[PATH_MAX];
915 long prev_posn = 0;
916 char range[RANGE_HEADER_SIZE];
917 struct curl_slist *range_header = NULL;
918
919 FILE *indexfile;
920 struct active_request_slot *slot;
921 struct slot_results results;
922
923 /* Don't use the index if the pack isn't there */
924 url = xmalloc(strlen(remote->url) + 64);
925 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
926 slot = get_active_slot();
927 slot->results = &results;
928 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
929 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
930 if (start_active_slot(slot)) {
931 run_active_slot(slot);
932 if (results.curl_result != CURLE_OK) {
933 free(url);
934 return error("Unable to verify pack %s is available",
935 hex);
936 }
937 } else {
938 return error("Unable to start request");
939 }
940
941 if (has_pack_index(sha1))
942 return 0;
943
944 if (push_verbosely)
945 fprintf(stderr, "Getting index for pack %s\n", hex);
946
947 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
948
949 filename = sha1_pack_index_name(sha1);
950 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
951 indexfile = fopen(tmpfile, "a");
952 if (!indexfile)
953 return error("Unable to open local file %s for pack index",
954 filename);
955
956 slot = get_active_slot();
957 slot->results = &results;
958 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
960 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
961 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
962 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
963 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
964 slot->local = indexfile;
965
966 /* If there is data present from a previous transfer attempt,
967 resume where it left off */
968 prev_posn = ftell(indexfile);
969 if (prev_posn>0) {
970 if (push_verbosely)
971 fprintf(stderr,
972 "Resuming fetch of index for pack %s at byte %ld\n",
973 hex, prev_posn);
974 sprintf(range, "Range: bytes=%ld-", prev_posn);
975 range_header = curl_slist_append(range_header, range);
976 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
977 }
978
979 if (start_active_slot(slot)) {
980 run_active_slot(slot);
981 if (results.curl_result != CURLE_OK) {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to get pack index %s\n%s", url,
985 curl_errorstr);
986 }
987 } else {
988 free(url);
989 fclose(indexfile);
990 return error("Unable to start request");
991 }
992
993 free(url);
994 fclose(indexfile);
995
996 return move_temp_to_file(tmpfile, filename);
997 }
998
999 static int setup_index(unsigned char *sha1)
1000 {
1001 struct packed_git *new_pack;
1002
1003 if (fetch_index(sha1))
1004 return -1;
1005
1006 new_pack = parse_pack_index(sha1);
1007 new_pack->next = remote->packs;
1008 remote->packs = new_pack;
1009 return 0;
1010 }
1011
1012 static int fetch_indices(void)
1013 {
1014 unsigned char sha1[20];
1015 char *url;
1016 struct buffer buffer;
1017 char *data;
1018 int i = 0;
1019
1020 struct active_request_slot *slot;
1021 struct slot_results results;
1022
1023 data = xcalloc(1, 4096);
1024 buffer.size = 4096;
1025 buffer.posn = 0;
1026 buffer.buffer = data;
1027
1028 if (push_verbosely)
1029 fprintf(stderr, "Getting pack list\n");
1030
1031 url = xmalloc(strlen(remote->url) + 20);
1032 sprintf(url, "%sobjects/info/packs", remote->url);
1033
1034 slot = get_active_slot();
1035 slot->results = &results;
1036 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1037 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1038 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1039 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1040 if (start_active_slot(slot)) {
1041 run_active_slot(slot);
1042 if (results.curl_result != CURLE_OK) {
1043 free(buffer.buffer);
1044 free(url);
1045 if (results.http_code == 404)
1046 return 0;
1047 else
1048 return error("%s", curl_errorstr);
1049 }
1050 } else {
1051 free(buffer.buffer);
1052 free(url);
1053 return error("Unable to start request");
1054 }
1055 free(url);
1056
1057 data = buffer.buffer;
1058 while (i < buffer.posn) {
1059 switch (data[i]) {
1060 case 'P':
1061 i++;
1062 if (i + 52 < buffer.posn &&
1063 !prefixcmp(data + i, " pack-") &&
1064 !prefixcmp(data + i + 46, ".pack\n")) {
1065 get_sha1_hex(data + i + 6, sha1);
1066 setup_index(sha1);
1067 i += 51;
1068 break;
1069 }
1070 default:
1071 while (data[i] != '\n')
1072 i++;
1073 }
1074 i++;
1075 }
1076
1077 free(buffer.buffer);
1078 return 0;
1079 }
1080
1081 static inline int needs_quote(int ch)
1082 {
1083 if (((ch >= 'A') && (ch <= 'Z'))
1084 || ((ch >= 'a') && (ch <= 'z'))
1085 || ((ch >= '0') && (ch <= '9'))
1086 || (ch == '/')
1087 || (ch == '-')
1088 || (ch == '.'))
1089 return 0;
1090 return 1;
1091 }
1092
1093 static inline int hex(int v)
1094 {
1095 if (v < 10) return '0' + v;
1096 else return 'A' + v - 10;
1097 }
1098
1099 static char *quote_ref_url(const char *base, const char *ref)
1100 {
1101 const char *cp;
1102 char *dp, *qref;
1103 int len, baselen, ch;
1104
1105 baselen = strlen(base);
1106 len = baselen + 1;
1107 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1108 if (needs_quote(ch))
1109 len += 2; /* extra two hex plus replacement % */
1110 qref = xmalloc(len);
1111 memcpy(qref, base, baselen);
1112 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1113 if (needs_quote(ch)) {
1114 *dp++ = '%';
1115 *dp++ = hex((ch >> 4) & 0xF);
1116 *dp++ = hex(ch & 0xF);
1117 }
1118 else
1119 *dp++ = ch;
1120 }
1121 *dp = 0;
1122
1123 return qref;
1124 }
1125
1126 int fetch_ref(char *ref, unsigned char *sha1)
1127 {
1128 char *url;
1129 char hex[42];
1130 struct buffer buffer;
1131 char *base = remote->url;
1132 struct active_request_slot *slot;
1133 struct slot_results results;
1134 buffer.size = 41;
1135 buffer.posn = 0;
1136 buffer.buffer = hex;
1137 hex[41] = '\0';
1138
1139 url = quote_ref_url(base, ref);
1140 slot = get_active_slot();
1141 slot->results = &results;
1142 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1143 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1144 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1145 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1146 if (start_active_slot(slot)) {
1147 run_active_slot(slot);
1148 if (results.curl_result != CURLE_OK)
1149 return error("Couldn't get %s for %s\n%s",
1150 url, ref, curl_errorstr);
1151 } else {
1152 return error("Unable to start request");
1153 }
1154
1155 hex[40] = '\0';
1156 get_sha1_hex(hex, sha1);
1157 return 0;
1158 }
1159
1160 static void one_remote_object(const char *hex)
1161 {
1162 unsigned char sha1[20];
1163 struct object *obj;
1164
1165 if (get_sha1_hex(hex, sha1) != 0)
1166 return;
1167
1168 obj = lookup_object(sha1);
1169 if (!obj)
1170 obj = parse_object(sha1);
1171
1172 /* Ignore remote objects that don't exist locally */
1173 if (!obj)
1174 return;
1175
1176 obj->flags |= REMOTE;
1177 if (!object_list_contains(objects, obj))
1178 object_list_insert(obj, &objects);
1179 }
1180
1181 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1182 {
1183 int *lock_flags = (int *)ctx->userData;
1184
1185 if (tag_closed) {
1186 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1187 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1188 (*lock_flags & DAV_PROP_LOCKWR)) {
1189 *lock_flags |= DAV_LOCK_OK;
1190 }
1191 *lock_flags &= DAV_LOCK_OK;
1192 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1193 *lock_flags |= DAV_PROP_LOCKWR;
1194 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1195 *lock_flags |= DAV_PROP_LOCKEX;
1196 }
1197 }
1198 }
1199
1200 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1201 {
1202 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1203
1204 if (tag_closed && ctx->cdata) {
1205 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1206 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1207 strcpy(lock->owner, ctx->cdata);
1208 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1209 if (!prefixcmp(ctx->cdata, "Second-"))
1210 lock->timeout =
1211 strtol(ctx->cdata + 7, NULL, 10);
1212 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1213 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1214 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1215 strcpy(lock->token, ctx->cdata + 16);
1216 }
1217 }
1218 }
1219 }
1220
1221 static void one_remote_ref(char *refname);
1222
1223 static void
1224 xml_start_tag(void *userData, const char *name, const char **atts)
1225 {
1226 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1227 const char *c = strchr(name, ':');
1228 int new_len;
1229
1230 if (c == NULL)
1231 c = name;
1232 else
1233 c++;
1234
1235 new_len = strlen(ctx->name) + strlen(c) + 2;
1236
1237 if (new_len > ctx->len) {
1238 ctx->name = xrealloc(ctx->name, new_len);
1239 ctx->len = new_len;
1240 }
1241 strcat(ctx->name, ".");
1242 strcat(ctx->name, c);
1243
1244 free(ctx->cdata);
1245 ctx->cdata = NULL;
1246
1247 ctx->userFunc(ctx, 0);
1248 }
1249
1250 static void
1251 xml_end_tag(void *userData, const char *name)
1252 {
1253 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1254 const char *c = strchr(name, ':');
1255 char *ep;
1256
1257 ctx->userFunc(ctx, 1);
1258
1259 if (c == NULL)
1260 c = name;
1261 else
1262 c++;
1263
1264 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1265 *ep = 0;
1266 }
1267
1268 static void
1269 xml_cdata(void *userData, const XML_Char *s, int len)
1270 {
1271 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1272 free(ctx->cdata);
1273 ctx->cdata = xmalloc(len + 1);
1274 /* NB: 's' is not null-terminated, can not use strlcpy here */
1275 memcpy(ctx->cdata, s, len);
1276 ctx->cdata[len] = '\0';
1277 }
1278
1279 static struct remote_lock *lock_remote(const char *path, long timeout)
1280 {
1281 struct active_request_slot *slot;
1282 struct slot_results results;
1283 struct buffer out_buffer;
1284 struct buffer in_buffer;
1285 char *out_data;
1286 char *in_data;
1287 char *url;
1288 char *ep;
1289 char timeout_header[25];
1290 struct remote_lock *lock = NULL;
1291 XML_Parser parser = XML_ParserCreate(NULL);
1292 enum XML_Status result;
1293 struct curl_slist *dav_headers = NULL;
1294 struct xml_ctx ctx;
1295
1296 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1297 sprintf(url, "%s%s", remote->url, path);
1298
1299 /* Make sure leading directories exist for the remote ref */
1300 ep = strchr(url + strlen(remote->url) + 1, '/');
1301 while (ep) {
1302 *ep = 0;
1303 slot = get_active_slot();
1304 slot->results = &results;
1305 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1306 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1307 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1308 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1309 if (start_active_slot(slot)) {
1310 run_active_slot(slot);
1311 if (results.curl_result != CURLE_OK &&
1312 results.http_code != 405) {
1313 fprintf(stderr,
1314 "Unable to create branch path %s\n",
1315 url);
1316 free(url);
1317 return NULL;
1318 }
1319 } else {
1320 fprintf(stderr, "Unable to start MKCOL request\n");
1321 free(url);
1322 return NULL;
1323 }
1324 *ep = '/';
1325 ep = strchr(ep + 1, '/');
1326 }
1327
1328 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1329 out_data = xmalloc(out_buffer.size + 1);
1330 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1331 out_buffer.posn = 0;
1332 out_buffer.buffer = out_data;
1333
1334 in_buffer.size = 4096;
1335 in_data = xmalloc(in_buffer.size);
1336 in_buffer.posn = 0;
1337 in_buffer.buffer = in_data;
1338
1339 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1340 dav_headers = curl_slist_append(dav_headers, timeout_header);
1341 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1342
1343 slot = get_active_slot();
1344 slot->results = &results;
1345 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1346 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1347 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1348 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1349 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1350 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1351 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1352 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1353 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1354
1355 lock = xcalloc(1, sizeof(*lock));
1356 lock->timeout = -1;
1357
1358 if (start_active_slot(slot)) {
1359 run_active_slot(slot);
1360 if (results.curl_result == CURLE_OK) {
1361 ctx.name = xcalloc(10, 1);
1362 ctx.len = 0;
1363 ctx.cdata = NULL;
1364 ctx.userFunc = handle_new_lock_ctx;
1365 ctx.userData = lock;
1366 XML_SetUserData(parser, &ctx);
1367 XML_SetElementHandler(parser, xml_start_tag,
1368 xml_end_tag);
1369 XML_SetCharacterDataHandler(parser, xml_cdata);
1370 result = XML_Parse(parser, in_buffer.buffer,
1371 in_buffer.posn, 1);
1372 free(ctx.name);
1373 if (result != XML_STATUS_OK) {
1374 fprintf(stderr, "XML error: %s\n",
1375 XML_ErrorString(
1376 XML_GetErrorCode(parser)));
1377 lock->timeout = -1;
1378 }
1379 }
1380 } else {
1381 fprintf(stderr, "Unable to start LOCK request\n");
1382 }
1383
1384 curl_slist_free_all(dav_headers);
1385 free(out_data);
1386 free(in_data);
1387
1388 if (lock->token == NULL || lock->timeout <= 0) {
1389 if (lock->token != NULL)
1390 free(lock->token);
1391 if (lock->owner != NULL)
1392 free(lock->owner);
1393 free(url);
1394 free(lock);
1395 lock = NULL;
1396 } else {
1397 lock->url = url;
1398 lock->start_time = time(NULL);
1399 lock->next = remote->locks;
1400 remote->locks = lock;
1401 }
1402
1403 return lock;
1404 }
1405
1406 static int unlock_remote(struct remote_lock *lock)
1407 {
1408 struct active_request_slot *slot;
1409 struct slot_results results;
1410 struct remote_lock *prev = remote->locks;
1411 char *lock_token_header;
1412 struct curl_slist *dav_headers = NULL;
1413 int rc = 0;
1414
1415 lock_token_header = xmalloc(strlen(lock->token) + 31);
1416 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1417 lock->token);
1418 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1419
1420 slot = get_active_slot();
1421 slot->results = &results;
1422 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1423 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1424 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1425 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1426
1427 if (start_active_slot(slot)) {
1428 run_active_slot(slot);
1429 if (results.curl_result == CURLE_OK)
1430 rc = 1;
1431 else
1432 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1433 results.http_code);
1434 } else {
1435 fprintf(stderr, "Unable to start UNLOCK request\n");
1436 }
1437
1438 curl_slist_free_all(dav_headers);
1439 free(lock_token_header);
1440
1441 if (remote->locks == lock) {
1442 remote->locks = lock->next;
1443 } else {
1444 while (prev && prev->next != lock)
1445 prev = prev->next;
1446 if (prev)
1447 prev->next = prev->next->next;
1448 }
1449
1450 if (lock->owner != NULL)
1451 free(lock->owner);
1452 free(lock->url);
1453 free(lock->token);
1454 free(lock);
1455
1456 return rc;
1457 }
1458
1459 static void remote_ls(const char *path, int flags,
1460 void (*userFunc)(struct remote_ls_ctx *ls),
1461 void *userData);
1462
1463 static void process_ls_object(struct remote_ls_ctx *ls)
1464 {
1465 unsigned int *parent = (unsigned int *)ls->userData;
1466 char *path = ls->dentry_name;
1467 char *obj_hex;
1468
1469 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1470 remote_dir_exists[*parent] = 1;
1471 return;
1472 }
1473
1474 if (strlen(path) != 49)
1475 return;
1476 path += 8;
1477 obj_hex = xmalloc(strlen(path));
1478 /* NB: path is not null-terminated, can not use strlcpy here */
1479 memcpy(obj_hex, path, 2);
1480 strcpy(obj_hex + 2, path + 3);
1481 one_remote_object(obj_hex);
1482 free(obj_hex);
1483 }
1484
1485 static void process_ls_ref(struct remote_ls_ctx *ls)
1486 {
1487 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1488 fprintf(stderr, " %s\n", ls->dentry_name);
1489 return;
1490 }
1491
1492 if (!(ls->dentry_flags & IS_DIR))
1493 one_remote_ref(ls->dentry_name);
1494 }
1495
1496 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1497 {
1498 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1499
1500 if (tag_closed) {
1501 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1502 if (ls->dentry_flags & IS_DIR) {
1503 if (ls->flags & PROCESS_DIRS) {
1504 ls->userFunc(ls);
1505 }
1506 if (strcmp(ls->dentry_name, ls->path) &&
1507 ls->flags & RECURSIVE) {
1508 remote_ls(ls->dentry_name,
1509 ls->flags,
1510 ls->userFunc,
1511 ls->userData);
1512 }
1513 } else if (ls->flags & PROCESS_FILES) {
1514 ls->userFunc(ls);
1515 }
1516 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1517 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1518 remote->path_len + 1);
1519 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1520 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1521 ls->dentry_flags |= IS_DIR;
1522 }
1523 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1524 free(ls->dentry_name);
1525 ls->dentry_name = NULL;
1526 ls->dentry_flags = 0;
1527 }
1528 }
1529
1530 static void remote_ls(const char *path, int flags,
1531 void (*userFunc)(struct remote_ls_ctx *ls),
1532 void *userData)
1533 {
1534 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1535 struct active_request_slot *slot;
1536 struct slot_results results;
1537 struct buffer in_buffer;
1538 struct buffer out_buffer;
1539 char *in_data;
1540 char *out_data;
1541 XML_Parser parser = XML_ParserCreate(NULL);
1542 enum XML_Status result;
1543 struct curl_slist *dav_headers = NULL;
1544 struct xml_ctx ctx;
1545 struct remote_ls_ctx ls;
1546
1547 ls.flags = flags;
1548 ls.path = xstrdup(path);
1549 ls.dentry_name = NULL;
1550 ls.dentry_flags = 0;
1551 ls.userData = userData;
1552 ls.userFunc = userFunc;
1553
1554 sprintf(url, "%s%s", remote->url, path);
1555
1556 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1557 out_data = xmalloc(out_buffer.size + 1);
1558 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1559 out_buffer.posn = 0;
1560 out_buffer.buffer = out_data;
1561
1562 in_buffer.size = 4096;
1563 in_data = xmalloc(in_buffer.size);
1564 in_buffer.posn = 0;
1565 in_buffer.buffer = in_data;
1566
1567 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1568 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1569
1570 slot = get_active_slot();
1571 slot->results = &results;
1572 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1573 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1574 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1575 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1576 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1577 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1578 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1579 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1580 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1581
1582 if (start_active_slot(slot)) {
1583 run_active_slot(slot);
1584 if (results.curl_result == CURLE_OK) {
1585 ctx.name = xcalloc(10, 1);
1586 ctx.len = 0;
1587 ctx.cdata = NULL;
1588 ctx.userFunc = handle_remote_ls_ctx;
1589 ctx.userData = &ls;
1590 XML_SetUserData(parser, &ctx);
1591 XML_SetElementHandler(parser, xml_start_tag,
1592 xml_end_tag);
1593 XML_SetCharacterDataHandler(parser, xml_cdata);
1594 result = XML_Parse(parser, in_buffer.buffer,
1595 in_buffer.posn, 1);
1596 free(ctx.name);
1597
1598 if (result != XML_STATUS_OK) {
1599 fprintf(stderr, "XML error: %s\n",
1600 XML_ErrorString(
1601 XML_GetErrorCode(parser)));
1602 }
1603 }
1604 } else {
1605 fprintf(stderr, "Unable to start PROPFIND request\n");
1606 }
1607
1608 free(ls.path);
1609 free(url);
1610 free(out_data);
1611 free(in_buffer.buffer);
1612 curl_slist_free_all(dav_headers);
1613 }
1614
1615 static void get_remote_object_list(unsigned char parent)
1616 {
1617 char path[] = "objects/XX/";
1618 static const char hex[] = "0123456789abcdef";
1619 unsigned int val = parent;
1620
1621 path[8] = hex[val >> 4];
1622 path[9] = hex[val & 0xf];
1623 remote_dir_exists[val] = 0;
1624 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1625 process_ls_object, &val);
1626 }
1627
1628 static int locking_available(void)
1629 {
1630 struct active_request_slot *slot;
1631 struct slot_results results;
1632 struct buffer in_buffer;
1633 struct buffer out_buffer;
1634 char *in_data;
1635 char *out_data;
1636 XML_Parser parser = XML_ParserCreate(NULL);
1637 enum XML_Status result;
1638 struct curl_slist *dav_headers = NULL;
1639 struct xml_ctx ctx;
1640 int lock_flags = 0;
1641
1642 out_buffer.size =
1643 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1644 strlen(remote->url) - 2;
1645 out_data = xmalloc(out_buffer.size + 1);
1646 snprintf(out_data, out_buffer.size + 1,
1647 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1648 out_buffer.posn = 0;
1649 out_buffer.buffer = out_data;
1650
1651 in_buffer.size = 4096;
1652 in_data = xmalloc(in_buffer.size);
1653 in_buffer.posn = 0;
1654 in_buffer.buffer = in_data;
1655
1656 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1657 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1658
1659 slot = get_active_slot();
1660 slot->results = &results;
1661 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1662 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1663 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1664 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1665 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1666 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1667 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1668 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1669 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1670
1671 if (start_active_slot(slot)) {
1672 run_active_slot(slot);
1673 if (results.curl_result == CURLE_OK) {
1674 ctx.name = xcalloc(10, 1);
1675 ctx.len = 0;
1676 ctx.cdata = NULL;
1677 ctx.userFunc = handle_lockprop_ctx;
1678 ctx.userData = &lock_flags;
1679 XML_SetUserData(parser, &ctx);
1680 XML_SetElementHandler(parser, xml_start_tag,
1681 xml_end_tag);
1682 result = XML_Parse(parser, in_buffer.buffer,
1683 in_buffer.posn, 1);
1684 free(ctx.name);
1685
1686 if (result != XML_STATUS_OK) {
1687 fprintf(stderr, "XML error: %s\n",
1688 XML_ErrorString(
1689 XML_GetErrorCode(parser)));
1690 lock_flags = 0;
1691 }
1692 }
1693 } else {
1694 fprintf(stderr, "Unable to start PROPFIND request\n");
1695 }
1696
1697 free(out_data);
1698 free(in_buffer.buffer);
1699 curl_slist_free_all(dav_headers);
1700
1701 return lock_flags;
1702 }
1703
1704 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1705 {
1706 struct object_list *entry = xmalloc(sizeof(struct object_list));
1707 entry->item = obj;
1708 entry->next = *p;
1709 *p = entry;
1710 return &entry->next;
1711 }
1712
1713 static struct object_list **process_blob(struct blob *blob,
1714 struct object_list **p,
1715 struct name_path *path,
1716 const char *name)
1717 {
1718 struct object *obj = &blob->object;
1719
1720 obj->flags |= LOCAL;
1721
1722 if (obj->flags & (UNINTERESTING | SEEN))
1723 return p;
1724
1725 obj->flags |= SEEN;
1726 return add_one_object(obj, p);
1727 }
1728
1729 static struct object_list **process_tree(struct tree *tree,
1730 struct object_list **p,
1731 struct name_path *path,
1732 const char *name)
1733 {
1734 struct object *obj = &tree->object;
1735 struct tree_desc desc;
1736 struct name_entry entry;
1737 struct name_path me;
1738
1739 obj->flags |= LOCAL;
1740
1741 if (obj->flags & (UNINTERESTING | SEEN))
1742 return p;
1743 if (parse_tree(tree) < 0)
1744 die("bad tree object %s", sha1_to_hex(obj->sha1));
1745
1746 obj->flags |= SEEN;
1747 name = xstrdup(name);
1748 p = add_one_object(obj, p);
1749 me.up = path;
1750 me.elem = name;
1751 me.elem_len = strlen(name);
1752
1753 init_tree_desc(&desc, tree->buffer, tree->size);
1754
1755 while (tree_entry(&desc, &entry)) {
1756 if (S_ISDIR(entry.mode))
1757 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1758 else
1759 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1760 }
1761 free(tree->buffer);
1762 tree->buffer = NULL;
1763 return p;
1764 }
1765
1766 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1767 {
1768 int i;
1769 struct commit *commit;
1770 struct object_list **p = &objects;
1771 int count = 0;
1772
1773 while ((commit = get_revision(revs)) != NULL) {
1774 p = process_tree(commit->tree, p, NULL, "");
1775 commit->object.flags |= LOCAL;
1776 if (!(commit->object.flags & UNINTERESTING))
1777 count += add_send_request(&commit->object, lock);
1778 }
1779
1780 for (i = 0; i < revs->pending.nr; i++) {
1781 struct object_array_entry *entry = revs->pending.objects + i;
1782 struct object *obj = entry->item;
1783 const char *name = entry->name;
1784
1785 if (obj->flags & (UNINTERESTING | SEEN))
1786 continue;
1787 if (obj->type == OBJ_TAG) {
1788 obj->flags |= SEEN;
1789 p = add_one_object(obj, p);
1790 continue;
1791 }
1792 if (obj->type == OBJ_TREE) {
1793 p = process_tree((struct tree *)obj, p, NULL, name);
1794 continue;
1795 }
1796 if (obj->type == OBJ_BLOB) {
1797 p = process_blob((struct blob *)obj, p, NULL, name);
1798 continue;
1799 }
1800 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1801 }
1802
1803 while (objects) {
1804 if (!(objects->item->flags & UNINTERESTING))
1805 count += add_send_request(objects->item, lock);
1806 objects = objects->next;
1807 }
1808
1809 return count;
1810 }
1811
1812 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1813 {
1814 struct active_request_slot *slot;
1815 struct slot_results results;
1816 char *out_data;
1817 char *if_header;
1818 struct buffer out_buffer;
1819 struct curl_slist *dav_headers = NULL;
1820 int i;
1821
1822 if_header = xmalloc(strlen(lock->token) + 25);
1823 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1824 dav_headers = curl_slist_append(dav_headers, if_header);
1825
1826 out_buffer.size = 41;
1827 out_data = xmalloc(out_buffer.size + 1);
1828 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1829 if (i != out_buffer.size) {
1830 fprintf(stderr, "Unable to initialize PUT request body\n");
1831 return 0;
1832 }
1833 out_buffer.posn = 0;
1834 out_buffer.buffer = out_data;
1835
1836 slot = get_active_slot();
1837 slot->results = &results;
1838 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1839 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1840 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1841 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1842 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1843 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1844 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1845 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1846 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1847
1848 if (start_active_slot(slot)) {
1849 run_active_slot(slot);
1850 free(out_data);
1851 free(if_header);
1852 if (results.curl_result != CURLE_OK) {
1853 fprintf(stderr,
1854 "PUT error: curl result=%d, HTTP code=%ld\n",
1855 results.curl_result, results.http_code);
1856 /* We should attempt recovery? */
1857 return 0;
1858 }
1859 } else {
1860 free(out_data);
1861 free(if_header);
1862 fprintf(stderr, "Unable to start PUT request\n");
1863 return 0;
1864 }
1865
1866 return 1;
1867 }
1868
1869 static struct ref *local_refs, **local_tail;
1870 static struct ref *remote_refs, **remote_tail;
1871
1872 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1873 {
1874 struct ref *ref;
1875 int len = strlen(refname) + 1;
1876 ref = xcalloc(1, sizeof(*ref) + len);
1877 hashcpy(ref->new_sha1, sha1);
1878 memcpy(ref->name, refname, len);
1879 *local_tail = ref;
1880 local_tail = &ref->next;
1881 return 0;
1882 }
1883
1884 static void one_remote_ref(char *refname)
1885 {
1886 struct ref *ref;
1887 unsigned char remote_sha1[20];
1888 struct object *obj;
1889 int len = strlen(refname) + 1;
1890
1891 if (fetch_ref(refname, remote_sha1) != 0) {
1892 fprintf(stderr,
1893 "Unable to fetch ref %s from %s\n",
1894 refname, remote->url);
1895 return;
1896 }
1897
1898 /*
1899 * Fetch a copy of the object if it doesn't exist locally - it
1900 * may be required for updating server info later.
1901 */
1902 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1903 obj = lookup_unknown_object(remote_sha1);
1904 if (obj) {
1905 fprintf(stderr, " fetch %s for %s\n",
1906 sha1_to_hex(remote_sha1), refname);
1907 add_fetch_request(obj);
1908 }
1909 }
1910
1911 ref = xcalloc(1, sizeof(*ref) + len);
1912 hashcpy(ref->old_sha1, remote_sha1);
1913 memcpy(ref->name, refname, len);
1914 *remote_tail = ref;
1915 remote_tail = &ref->next;
1916 }
1917
1918 static void get_local_heads(void)
1919 {
1920 local_tail = &local_refs;
1921 for_each_ref(one_local_ref, NULL);
1922 }
1923
1924 static void get_dav_remote_heads(void)
1925 {
1926 remote_tail = &remote_refs;
1927 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1928 }
1929
1930 static int is_zero_sha1(const unsigned char *sha1)
1931 {
1932 int i;
1933
1934 for (i = 0; i < 20; i++) {
1935 if (*sha1++)
1936 return 0;
1937 }
1938 return 1;
1939 }
1940
1941 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1942 {
1943 while (list) {
1944 struct commit_list *temp = list;
1945 temp->item->object.flags &= ~mark;
1946 list = temp->next;
1947 free(temp);
1948 }
1949 }
1950
1951 static int ref_newer(const unsigned char *new_sha1,
1952 const unsigned char *old_sha1)
1953 {
1954 struct object *o;
1955 struct commit *old, *new;
1956 struct commit_list *list, *used;
1957 int found = 0;
1958
1959 /* Both new and old must be commit-ish and new is descendant of
1960 * old. Otherwise we require --force.
1961 */
1962 o = deref_tag(parse_object(old_sha1), NULL, 0);
1963 if (!o || o->type != OBJ_COMMIT)
1964 return 0;
1965 old = (struct commit *) o;
1966
1967 o = deref_tag(parse_object(new_sha1), NULL, 0);
1968 if (!o || o->type != OBJ_COMMIT)
1969 return 0;
1970 new = (struct commit *) o;
1971
1972 if (parse_commit(new) < 0)
1973 return 0;
1974
1975 used = list = NULL;
1976 commit_list_insert(new, &list);
1977 while (list) {
1978 new = pop_most_recent_commit(&list, TMP_MARK);
1979 commit_list_insert(new, &used);
1980 if (new == old) {
1981 found = 1;
1982 break;
1983 }
1984 }
1985 unmark_and_free(list, TMP_MARK);
1986 unmark_and_free(used, TMP_MARK);
1987 return found;
1988 }
1989
1990 static void mark_edge_parents_uninteresting(struct commit *commit)
1991 {
1992 struct commit_list *parents;
1993
1994 for (parents = commit->parents; parents; parents = parents->next) {
1995 struct commit *parent = parents->item;
1996 if (!(parent->object.flags & UNINTERESTING))
1997 continue;
1998 mark_tree_uninteresting(parent->tree);
1999 }
2000 }
2001
2002 static void mark_edges_uninteresting(struct commit_list *list)
2003 {
2004 for ( ; list; list = list->next) {
2005 struct commit *commit = list->item;
2006
2007 if (commit->object.flags & UNINTERESTING) {
2008 mark_tree_uninteresting(commit->tree);
2009 continue;
2010 }
2011 mark_edge_parents_uninteresting(commit);
2012 }
2013 }
2014
2015 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2016 {
2017 struct buffer *buf = (struct buffer *)ls->userData;
2018 unsigned char remote_sha1[20];
2019 struct object *o;
2020 int len;
2021 char *ref_info;
2022
2023 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2024 fprintf(stderr,
2025 "Unable to fetch ref %s from %s\n",
2026 ls->dentry_name, remote->url);
2027 aborted = 1;
2028 return;
2029 }
2030
2031 o = parse_object(remote_sha1);
2032 if (!o) {
2033 fprintf(stderr,
2034 "Unable to parse object %s for remote ref %s\n",
2035 sha1_to_hex(remote_sha1), ls->dentry_name);
2036 aborted = 1;
2037 return;
2038 }
2039
2040 len = strlen(ls->dentry_name) + 42;
2041 ref_info = xcalloc(len + 1, 1);
2042 sprintf(ref_info, "%s %s\n",
2043 sha1_to_hex(remote_sha1), ls->dentry_name);
2044 fwrite_buffer(ref_info, 1, len, buf);
2045 free(ref_info);
2046
2047 if (o->type == OBJ_TAG) {
2048 o = deref_tag(o, ls->dentry_name, 0);
2049 if (o) {
2050 len = strlen(ls->dentry_name) + 45;
2051 ref_info = xcalloc(len + 1, 1);
2052 sprintf(ref_info, "%s %s^{}\n",
2053 sha1_to_hex(o->sha1), ls->dentry_name);
2054 fwrite_buffer(ref_info, 1, len, buf);
2055 free(ref_info);
2056 }
2057 }
2058 }
2059
2060 static void update_remote_info_refs(struct remote_lock *lock)
2061 {
2062 struct buffer buffer;
2063 struct active_request_slot *slot;
2064 struct slot_results results;
2065 char *if_header;
2066 struct curl_slist *dav_headers = NULL;
2067
2068 buffer.buffer = xcalloc(1, 4096);
2069 buffer.size = 4096;
2070 buffer.posn = 0;
2071 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2072 add_remote_info_ref, &buffer);
2073 if (!aborted) {
2074 if_header = xmalloc(strlen(lock->token) + 25);
2075 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2076 dav_headers = curl_slist_append(dav_headers, if_header);
2077
2078 slot = get_active_slot();
2079 slot->results = &results;
2080 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2081 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2082 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2083 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2084 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2085 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2086 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2087 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2088 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2089
2090 buffer.posn = 0;
2091
2092 if (start_active_slot(slot)) {
2093 run_active_slot(slot);
2094 if (results.curl_result != CURLE_OK) {
2095 fprintf(stderr,
2096 "PUT error: curl result=%d, HTTP code=%ld\n",
2097 results.curl_result, results.http_code);
2098 }
2099 }
2100 free(if_header);
2101 }
2102 free(buffer.buffer);
2103 }
2104
2105 static int remote_exists(const char *path)
2106 {
2107 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2108 struct active_request_slot *slot;
2109 struct slot_results results;
2110
2111 sprintf(url, "%s%s", remote->url, path);
2112
2113 slot = get_active_slot();
2114 slot->results = &results;
2115 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2116 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2117
2118 if (start_active_slot(slot)) {
2119 run_active_slot(slot);
2120 if (results.http_code == 404)
2121 return 0;
2122 else if (results.curl_result == CURLE_OK)
2123 return 1;
2124 else
2125 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2126 } else {
2127 fprintf(stderr, "Unable to start HEAD request\n");
2128 }
2129
2130 return -1;
2131 }
2132
2133 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2134 {
2135 char *url;
2136 struct buffer buffer;
2137 struct active_request_slot *slot;
2138 struct slot_results results;
2139
2140 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2141 sprintf(url, "%s%s", remote->url, path);
2142
2143 buffer.size = 4096;
2144 buffer.posn = 0;
2145 buffer.buffer = xmalloc(buffer.size);
2146
2147 slot = get_active_slot();
2148 slot->results = &results;
2149 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2150 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2151 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2152 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2153 if (start_active_slot(slot)) {
2154 run_active_slot(slot);
2155 if (results.curl_result != CURLE_OK) {
2156 die("Couldn't get %s for remote symref\n%s",
2157 url, curl_errorstr);
2158 }
2159 } else {
2160 die("Unable to start remote symref request");
2161 }
2162 free(url);
2163
2164 if (*symref != NULL)
2165 free(*symref);
2166 *symref = NULL;
2167 hashclr(sha1);
2168
2169 if (buffer.posn == 0)
2170 return;
2171
2172 /* If it's a symref, set the refname; otherwise try for a sha1 */
2173 if (!prefixcmp((char *)buffer.buffer, "ref: ")) {
2174 *symref = xmalloc(buffer.posn - 5);
2175 memcpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 6);
2176 (*symref)[buffer.posn - 6] = '\0';
2177 } else {
2178 get_sha1_hex(buffer.buffer, sha1);
2179 }
2180
2181 free(buffer.buffer);
2182 }
2183
2184 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2185 {
2186 struct commit *head = lookup_commit(head_sha1);
2187 struct commit *branch = lookup_commit(branch_sha1);
2188 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2189
2190 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2191 }
2192
2193 static int delete_remote_branch(char *pattern, int force)
2194 {
2195 struct ref *refs = remote_refs;
2196 struct ref *remote_ref = NULL;
2197 unsigned char head_sha1[20];
2198 char *symref = NULL;
2199 int match;
2200 int patlen = strlen(pattern);
2201 int i;
2202 struct active_request_slot *slot;
2203 struct slot_results results;
2204 char *url;
2205
2206 /* Find the remote branch(es) matching the specified branch name */
2207 for (match = 0; refs; refs = refs->next) {
2208 char *name = refs->name;
2209 int namelen = strlen(name);
2210 if (namelen < patlen ||
2211 memcmp(name + namelen - patlen, pattern, patlen))
2212 continue;
2213 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2214 continue;
2215 match++;
2216 remote_ref = refs;
2217 }
2218 if (match == 0)
2219 return error("No remote branch matches %s", pattern);
2220 if (match != 1)
2221 return error("More than one remote branch matches %s",
2222 pattern);
2223
2224 /*
2225 * Remote HEAD must be a symref (not exactly foolproof; a remote
2226 * symlink to a symref will look like a symref)
2227 */
2228 fetch_symref("HEAD", &symref, head_sha1);
2229 if (!symref)
2230 return error("Remote HEAD is not a symref");
2231
2232 /* Remote branch must not be the remote HEAD */
2233 for (i=0; symref && i<MAXDEPTH; i++) {
2234 if (!strcmp(remote_ref->name, symref))
2235 return error("Remote branch %s is the current HEAD",
2236 remote_ref->name);
2237 fetch_symref(symref, &symref, head_sha1);
2238 }
2239
2240 /* Run extra sanity checks if delete is not forced */
2241 if (!force) {
2242 /* Remote HEAD must resolve to a known object */
2243 if (symref)
2244 return error("Remote HEAD symrefs too deep");
2245 if (is_zero_sha1(head_sha1))
2246 return error("Unable to resolve remote HEAD");
2247 if (!has_sha1_file(head_sha1))
2248 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2249
2250 /* Remote branch must resolve to a known object */
2251 if (is_zero_sha1(remote_ref->old_sha1))
2252 return error("Unable to resolve remote branch %s",
2253 remote_ref->name);
2254 if (!has_sha1_file(remote_ref->old_sha1))
2255 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));
2256
2257 /* Remote branch must be an ancestor of remote HEAD */
2258 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2259 return error("The branch '%s' is not a strict subset of your current HEAD.\nIf you are sure you want to delete it, run:\n\t'git http-push -D %s %s'", remote_ref->name, remote->url, pattern);
2260 }
2261 }
2262
2263 /* Send delete request */
2264 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2265 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2266 sprintf(url, "%s%s", remote->url, remote_ref->name);
2267 slot = get_active_slot();
2268 slot->results = &results;
2269 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2270 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2271 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2272 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2273 if (start_active_slot(slot)) {
2274 run_active_slot(slot);
2275 free(url);
2276 if (results.curl_result != CURLE_OK)
2277 return error("DELETE request failed (%d/%ld)\n",
2278 results.curl_result, results.http_code);
2279 } else {
2280 free(url);
2281 return error("Unable to start DELETE request");
2282 }
2283
2284 return 0;
2285 }
2286
2287 int main(int argc, char **argv)
2288 {
2289 struct transfer_request *request;
2290 struct transfer_request *next_request;
2291 int nr_refspec = 0;
2292 char **refspec = NULL;
2293 struct remote_lock *ref_lock = NULL;
2294 struct remote_lock *info_ref_lock = NULL;
2295 struct rev_info revs;
2296 int delete_branch = 0;
2297 int force_delete = 0;
2298 int objects_to_send;
2299 int rc = 0;
2300 int i;
2301 int new_refs;
2302 struct ref *ref;
2303
2304 setup_git_directory();
2305
2306 remote = xcalloc(sizeof(*remote), 1);
2307
2308 argv++;
2309 for (i = 1; i < argc; i++, argv++) {
2310 char *arg = *argv;
2311
2312 if (*arg == '-') {
2313 if (!strcmp(arg, "--all")) {
2314 push_all = 1;
2315 continue;
2316 }
2317 if (!strcmp(arg, "--force")) {
2318 force_all = 1;
2319 continue;
2320 }
2321 if (!strcmp(arg, "--verbose")) {
2322 push_verbosely = 1;
2323 continue;
2324 }
2325 if (!strcmp(arg, "-d")) {
2326 delete_branch = 1;
2327 continue;
2328 }
2329 if (!strcmp(arg, "-D")) {
2330 delete_branch = 1;
2331 force_delete = 1;
2332 continue;
2333 }
2334 }
2335 if (!remote->url) {
2336 char *path = strstr(arg, "//");
2337 remote->url = arg;
2338 if (path) {
2339 path = strchr(path+2, '/');
2340 if (path)
2341 remote->path_len = strlen(path);
2342 }
2343 continue;
2344 }
2345 refspec = argv;
2346 nr_refspec = argc - i;
2347 break;
2348 }
2349
2350 if (!remote->url)
2351 usage(http_push_usage);
2352
2353 if (delete_branch && nr_refspec != 1)
2354 die("You must specify only one branch name when deleting a remote branch");
2355
2356 memset(remote_dir_exists, -1, 256);
2357
2358 http_init();
2359
2360 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2361 default_headers = curl_slist_append(default_headers, "Range:");
2362 default_headers = curl_slist_append(default_headers, "Destination:");
2363 default_headers = curl_slist_append(default_headers, "If:");
2364 default_headers = curl_slist_append(default_headers,
2365 "Pragma: no-cache");
2366
2367 /* Verify DAV compliance/lock support */
2368 if (!locking_available()) {
2369 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2370 rc = 1;
2371 goto cleanup;
2372 }
2373
2374 /* Check whether the remote has server info files */
2375 remote->can_update_info_refs = 0;
2376 remote->has_info_refs = remote_exists("info/refs");
2377 remote->has_info_packs = remote_exists("objects/info/packs");
2378 if (remote->has_info_refs) {
2379 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2380 if (info_ref_lock)
2381 remote->can_update_info_refs = 1;
2382 }
2383 if (remote->has_info_packs)
2384 fetch_indices();
2385
2386 /* Get a list of all local and remote heads to validate refspecs */
2387 get_local_heads();
2388 fprintf(stderr, "Fetching remote heads...\n");
2389 get_dav_remote_heads();
2390
2391 /* Remove a remote branch if -d or -D was specified */
2392 if (delete_branch) {
2393 if (delete_remote_branch(refspec[0], force_delete) == -1)
2394 fprintf(stderr, "Unable to delete remote branch %s\n",
2395 refspec[0]);
2396 goto cleanup;
2397 }
2398
2399 /* match them up */
2400 if (!remote_tail)
2401 remote_tail = &remote_refs;
2402 if (match_refs(local_refs, remote_refs, &remote_tail,
2403 nr_refspec, refspec, push_all))
2404 return -1;
2405 if (!remote_refs) {
2406 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2407 return 0;
2408 }
2409
2410 new_refs = 0;
2411 for (ref = remote_refs; ref; ref = ref->next) {
2412 char old_hex[60], *new_hex;
2413 const char *commit_argv[4];
2414 int commit_argc;
2415 char *new_sha1_hex, *old_sha1_hex;
2416
2417 if (!ref->peer_ref)
2418 continue;
2419 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2420 if (push_verbosely || 1)
2421 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2422 continue;
2423 }
2424
2425 if (!force_all &&
2426 !is_zero_sha1(ref->old_sha1) &&
2427 !ref->force) {
2428 if (!has_sha1_file(ref->old_sha1) ||
2429 !ref_newer(ref->peer_ref->new_sha1,
2430 ref->old_sha1)) {
2431 /* We do not have the remote ref, or
2432 * we know that the remote ref is not
2433 * an ancestor of what we are trying to
2434 * push. Either way this can be losing
2435 * commits at the remote end and likely
2436 * we were not up to date to begin with.
2437 */
2438 error("remote '%s' is not a strict "
2439 "subset of local ref '%s'. "
2440 "maybe you are not up-to-date and "
2441 "need to pull first?",
2442 ref->name,
2443 ref->peer_ref->name);
2444 rc = -2;
2445 continue;
2446 }
2447 }
2448 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2449 if (is_zero_sha1(ref->new_sha1)) {
2450 error("cannot happen anymore");
2451 rc = -3;
2452 continue;
2453 }
2454 new_refs++;
2455 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2456 new_hex = sha1_to_hex(ref->new_sha1);
2457
2458 fprintf(stderr, "updating '%s'", ref->name);
2459 if (strcmp(ref->name, ref->peer_ref->name))
2460 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2461 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2462
2463
2464 /* Lock remote branch ref */
2465 ref_lock = lock_remote(ref->name, LOCK_TIME);
2466 if (ref_lock == NULL) {
2467 fprintf(stderr, "Unable to lock remote branch %s\n",
2468 ref->name);
2469 rc = 1;
2470 continue;
2471 }
2472
2473 /* Set up revision info for this refspec */
2474 commit_argc = 3;
2475 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2476 old_sha1_hex = NULL;
2477 commit_argv[1] = "--objects";
2478 commit_argv[2] = new_sha1_hex;
2479 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2480 old_sha1_hex = xmalloc(42);
2481 sprintf(old_sha1_hex, "^%s",
2482 sha1_to_hex(ref->old_sha1));
2483 commit_argv[3] = old_sha1_hex;
2484 commit_argc++;
2485 }
2486 init_revisions(&revs, setup_git_directory());
2487 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2488 free(new_sha1_hex);
2489 if (old_sha1_hex) {
2490 free(old_sha1_hex);
2491 commit_argv[1] = NULL;
2492 }
2493
2494 /* Generate a list of objects that need to be pushed */
2495 pushing = 0;
2496 prepare_revision_walk(&revs);
2497 mark_edges_uninteresting(revs.commits);
2498 objects_to_send = get_delta(&revs, ref_lock);
2499 finish_all_active_slots();
2500
2501 /* Push missing objects to remote, this would be a
2502 convenient time to pack them first if appropriate. */
2503 pushing = 1;
2504 if (objects_to_send)
2505 fprintf(stderr, " sending %d objects\n",
2506 objects_to_send);
2507 #ifdef USE_CURL_MULTI
2508 fill_active_slots();
2509 #endif
2510 finish_all_active_slots();
2511
2512 /* Update the remote branch if all went well */
2513 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2514 rc = 1;
2515 goto unlock;
2516 }
2517
2518 unlock:
2519 if (!rc)
2520 fprintf(stderr, " done\n");
2521 unlock_remote(ref_lock);
2522 check_locks();
2523 }
2524
2525 /* Update remote server info if appropriate */
2526 if (remote->has_info_refs && new_refs) {
2527 if (info_ref_lock && remote->can_update_info_refs) {
2528 fprintf(stderr, "Updating remote server info\n");
2529 update_remote_info_refs(info_ref_lock);
2530 } else {
2531 fprintf(stderr, "Unable to update server info\n");
2532 }
2533 }
2534 if (info_ref_lock)
2535 unlock_remote(info_ref_lock);
2536
2537 cleanup:
2538 free(remote);
2539
2540 curl_slist_free_all(no_pragma_header);
2541 curl_slist_free_all(default_headers);
2542
2543 http_cleanup();
2544
2545 request = request_queue_head;
2546 while (request != NULL) {
2547 next_request = request->next;
2548 release_request(request);
2549 request = next_request;
2550 }
2551
2552 return rc;
2553 }
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