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get_tree_entry: map blank requested entry to tree root
[git/peff.git] / http-push.c
blob7e73eac9c3476053c337a361106397c35ae3ee79
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 char type[20];
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", 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 fclose(request->local_stream);
774 request->local_stream = NULL;
775 if (!move_temp_to_file(request->tmpfile,
776 request->filename)) {
777 target = (struct packed_git *)request->userData;
778 lst = &remote->packs;
779 while (*lst != target)
780 lst = &((*lst)->next);
781 *lst = (*lst)->next;
782
783 if (!verify_pack(target, 0))
784 install_packed_git(target);
785 else
786 remote->can_update_info_refs = 0;
787 }
788 }
789 release_request(request);
790 }
791 }
792
793 #ifdef USE_CURL_MULTI
794 void fill_active_slots(void)
795 {
796 struct transfer_request *request = request_queue_head;
797 struct transfer_request *next;
798 struct active_request_slot *slot = active_queue_head;
799 int num_transfers;
800
801 if (aborted)
802 return;
803
804 while (active_requests < max_requests && request != NULL) {
805 next = request->next;
806 if (request->state == NEED_FETCH) {
807 start_fetch_loose(request);
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 curl_multi_perform(curlm, &num_transfers);
815 }
816 request = next;
817 }
818
819 while (slot != NULL) {
820 if (!slot->in_use && slot->curl != NULL) {
821 curl_easy_cleanup(slot->curl);
822 slot->curl = NULL;
823 }
824 slot = slot->next;
825 }
826 }
827 #endif
828
829 static void get_remote_object_list(unsigned char parent);
830
831 static void add_fetch_request(struct object *obj)
832 {
833 struct transfer_request *request;
834
835 check_locks();
836
837 /*
838 * Don't fetch the object if it's known to exist locally
839 * or is already in the request queue
840 */
841 if (remote_dir_exists[obj->sha1[0]] == -1)
842 get_remote_object_list(obj->sha1[0]);
843 if (obj->flags & (LOCAL | FETCHING))
844 return;
845
846 obj->flags |= FETCHING;
847 request = xmalloc(sizeof(*request));
848 request->obj = obj;
849 request->url = NULL;
850 request->lock = NULL;
851 request->headers = NULL;
852 request->local_fileno = -1;
853 request->local_stream = NULL;
854 request->state = NEED_FETCH;
855 request->next = request_queue_head;
856 request_queue_head = request;
857
858 #ifdef USE_CURL_MULTI
859 fill_active_slots();
860 step_active_slots();
861 #endif
862 }
863
864 static int add_send_request(struct object *obj, struct remote_lock *lock)
865 {
866 struct transfer_request *request = request_queue_head;
867 struct packed_git *target;
868
869 /* Keep locks active */
870 check_locks();
871
872 /*
873 * Don't push the object if it's known to exist on the remote
874 * or is already in the request queue
875 */
876 if (remote_dir_exists[obj->sha1[0]] == -1)
877 get_remote_object_list(obj->sha1[0]);
878 if (obj->flags & (REMOTE | PUSHING))
879 return 0;
880 target = find_sha1_pack(obj->sha1, remote->packs);
881 if (target) {
882 obj->flags |= REMOTE;
883 return 0;
884 }
885
886 obj->flags |= PUSHING;
887 request = xmalloc(sizeof(*request));
888 request->obj = obj;
889 request->url = NULL;
890 request->lock = lock;
891 request->headers = NULL;
892 request->local_fileno = -1;
893 request->local_stream = NULL;
894 request->state = NEED_PUSH;
895 request->next = request_queue_head;
896 request_queue_head = request;
897
898 #ifdef USE_CURL_MULTI
899 fill_active_slots();
900 step_active_slots();
901 #endif
902
903 return 1;
904 }
905
906 static int fetch_index(unsigned char *sha1)
907 {
908 char *hex = sha1_to_hex(sha1);
909 char *filename;
910 char *url;
911 char tmpfile[PATH_MAX];
912 long prev_posn = 0;
913 char range[RANGE_HEADER_SIZE];
914 struct curl_slist *range_header = NULL;
915
916 FILE *indexfile;
917 struct active_request_slot *slot;
918 struct slot_results results;
919
920 /* Don't use the index if the pack isn't there */
921 url = xmalloc(strlen(remote->url) + 64);
922 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
923 slot = get_active_slot();
924 slot->results = &results;
925 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
926 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
927 if (start_active_slot(slot)) {
928 run_active_slot(slot);
929 if (results.curl_result != CURLE_OK) {
930 free(url);
931 return error("Unable to verify pack %s is available",
932 hex);
933 }
934 } else {
935 return error("Unable to start request");
936 }
937
938 if (has_pack_index(sha1))
939 return 0;
940
941 if (push_verbosely)
942 fprintf(stderr, "Getting index for pack %s\n", hex);
943
944 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
945
946 filename = sha1_pack_index_name(sha1);
947 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
948 indexfile = fopen(tmpfile, "a");
949 if (!indexfile)
950 return error("Unable to open local file %s for pack index",
951 filename);
952
953 slot = get_active_slot();
954 slot->results = &results;
955 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
956 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
957 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
958 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
959 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
960 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
961 slot->local = indexfile;
962
963 /* If there is data present from a previous transfer attempt,
964 resume where it left off */
965 prev_posn = ftell(indexfile);
966 if (prev_posn>0) {
967 if (push_verbosely)
968 fprintf(stderr,
969 "Resuming fetch of index for pack %s at byte %ld\n",
970 hex, prev_posn);
971 sprintf(range, "Range: bytes=%ld-", prev_posn);
972 range_header = curl_slist_append(range_header, range);
973 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
974 }
975
976 if (start_active_slot(slot)) {
977 run_active_slot(slot);
978 if (results.curl_result != CURLE_OK) {
979 free(url);
980 fclose(indexfile);
981 return error("Unable to get pack index %s\n%s", url,
982 curl_errorstr);
983 }
984 } else {
985 free(url);
986 fclose(indexfile);
987 return error("Unable to start request");
988 }
989
990 free(url);
991 fclose(indexfile);
992
993 return move_temp_to_file(tmpfile, filename);
994 }
995
996 static int setup_index(unsigned char *sha1)
997 {
998 struct packed_git *new_pack;
999
1000 if (fetch_index(sha1))
1001 return -1;
1002
1003 new_pack = parse_pack_index(sha1);
1004 new_pack->next = remote->packs;
1005 remote->packs = new_pack;
1006 return 0;
1007 }
1008
1009 static int fetch_indices(void)
1010 {
1011 unsigned char sha1[20];
1012 char *url;
1013 struct buffer buffer;
1014 char *data;
1015 int i = 0;
1016
1017 struct active_request_slot *slot;
1018 struct slot_results results;
1019
1020 data = xcalloc(1, 4096);
1021 buffer.size = 4096;
1022 buffer.posn = 0;
1023 buffer.buffer = data;
1024
1025 if (push_verbosely)
1026 fprintf(stderr, "Getting pack list\n");
1027
1028 url = xmalloc(strlen(remote->url) + 20);
1029 sprintf(url, "%sobjects/info/packs", remote->url);
1030
1031 slot = get_active_slot();
1032 slot->results = &results;
1033 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1034 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1035 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1036 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1037 if (start_active_slot(slot)) {
1038 run_active_slot(slot);
1039 if (results.curl_result != CURLE_OK) {
1040 free(buffer.buffer);
1041 free(url);
1042 if (results.http_code == 404)
1043 return 0;
1044 else
1045 return error("%s", curl_errorstr);
1046 }
1047 } else {
1048 free(buffer.buffer);
1049 free(url);
1050 return error("Unable to start request");
1051 }
1052 free(url);
1053
1054 data = buffer.buffer;
1055 while (i < buffer.posn) {
1056 switch (data[i]) {
1057 case 'P':
1058 i++;
1059 if (i + 52 < buffer.posn &&
1060 !strncmp(data + i, " pack-", 6) &&
1061 !strncmp(data + i + 46, ".pack\n", 6)) {
1062 get_sha1_hex(data + i + 6, sha1);
1063 setup_index(sha1);
1064 i += 51;
1065 break;
1066 }
1067 default:
1068 while (data[i] != '\n')
1069 i++;
1070 }
1071 i++;
1072 }
1073
1074 free(buffer.buffer);
1075 return 0;
1076 }
1077
1078 static inline int needs_quote(int ch)
1079 {
1080 if (((ch >= 'A') && (ch <= 'Z'))
1081 || ((ch >= 'a') && (ch <= 'z'))
1082 || ((ch >= '0') && (ch <= '9'))
1083 || (ch == '/')
1084 || (ch == '-')
1085 || (ch == '.'))
1086 return 0;
1087 return 1;
1088 }
1089
1090 static inline int hex(int v)
1091 {
1092 if (v < 10) return '0' + v;
1093 else return 'A' + v - 10;
1094 }
1095
1096 static char *quote_ref_url(const char *base, const char *ref)
1097 {
1098 const char *cp;
1099 char *dp, *qref;
1100 int len, baselen, ch;
1101
1102 baselen = strlen(base);
1103 len = baselen + 1;
1104 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1105 if (needs_quote(ch))
1106 len += 2; /* extra two hex plus replacement % */
1107 qref = xmalloc(len);
1108 memcpy(qref, base, baselen);
1109 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1110 if (needs_quote(ch)) {
1111 *dp++ = '%';
1112 *dp++ = hex((ch >> 4) & 0xF);
1113 *dp++ = hex(ch & 0xF);
1114 }
1115 else
1116 *dp++ = ch;
1117 }
1118 *dp = 0;
1119
1120 return qref;
1121 }
1122
1123 int fetch_ref(char *ref, unsigned char *sha1)
1124 {
1125 char *url;
1126 char hex[42];
1127 struct buffer buffer;
1128 char *base = remote->url;
1129 struct active_request_slot *slot;
1130 struct slot_results results;
1131 buffer.size = 41;
1132 buffer.posn = 0;
1133 buffer.buffer = hex;
1134 hex[41] = '\0';
1135
1136 url = quote_ref_url(base, ref);
1137 slot = get_active_slot();
1138 slot->results = &results;
1139 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1140 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1141 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1142 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1143 if (start_active_slot(slot)) {
1144 run_active_slot(slot);
1145 if (results.curl_result != CURLE_OK)
1146 return error("Couldn't get %s for %s\n%s",
1147 url, ref, curl_errorstr);
1148 } else {
1149 return error("Unable to start request");
1150 }
1151
1152 hex[40] = '\0';
1153 get_sha1_hex(hex, sha1);
1154 return 0;
1155 }
1156
1157 static void one_remote_object(const char *hex)
1158 {
1159 unsigned char sha1[20];
1160 struct object *obj;
1161
1162 if (get_sha1_hex(hex, sha1) != 0)
1163 return;
1164
1165 obj = lookup_object(sha1);
1166 if (!obj)
1167 obj = parse_object(sha1);
1168
1169 /* Ignore remote objects that don't exist locally */
1170 if (!obj)
1171 return;
1172
1173 obj->flags |= REMOTE;
1174 if (!object_list_contains(objects, obj))
1175 object_list_insert(obj, &objects);
1176 }
1177
1178 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1179 {
1180 int *lock_flags = (int *)ctx->userData;
1181
1182 if (tag_closed) {
1183 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1184 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1185 (*lock_flags & DAV_PROP_LOCKWR)) {
1186 *lock_flags |= DAV_LOCK_OK;
1187 }
1188 *lock_flags &= DAV_LOCK_OK;
1189 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1190 *lock_flags |= DAV_PROP_LOCKWR;
1191 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1192 *lock_flags |= DAV_PROP_LOCKEX;
1193 }
1194 }
1195 }
1196
1197 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1198 {
1199 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1200
1201 if (tag_closed && ctx->cdata) {
1202 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1203 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1204 strcpy(lock->owner, ctx->cdata);
1205 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1206 if (!strncmp(ctx->cdata, "Second-", 7))
1207 lock->timeout =
1208 strtol(ctx->cdata + 7, NULL, 10);
1209 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1210 if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
1211 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1212 strcpy(lock->token, ctx->cdata + 16);
1213 }
1214 }
1215 }
1216 }
1217
1218 static void one_remote_ref(char *refname);
1219
1220 static void
1221 xml_start_tag(void *userData, const char *name, const char **atts)
1222 {
1223 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1224 const char *c = strchr(name, ':');
1225 int new_len;
1226
1227 if (c == NULL)
1228 c = name;
1229 else
1230 c++;
1231
1232 new_len = strlen(ctx->name) + strlen(c) + 2;
1233
1234 if (new_len > ctx->len) {
1235 ctx->name = xrealloc(ctx->name, new_len);
1236 ctx->len = new_len;
1237 }
1238 strcat(ctx->name, ".");
1239 strcat(ctx->name, c);
1240
1241 free(ctx->cdata);
1242 ctx->cdata = NULL;
1243
1244 ctx->userFunc(ctx, 0);
1245 }
1246
1247 static void
1248 xml_end_tag(void *userData, const char *name)
1249 {
1250 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1251 const char *c = strchr(name, ':');
1252 char *ep;
1253
1254 ctx->userFunc(ctx, 1);
1255
1256 if (c == NULL)
1257 c = name;
1258 else
1259 c++;
1260
1261 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1262 *ep = 0;
1263 }
1264
1265 static void
1266 xml_cdata(void *userData, const XML_Char *s, int len)
1267 {
1268 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1269 free(ctx->cdata);
1270 ctx->cdata = xmalloc(len + 1);
1271 strlcpy(ctx->cdata, s, len + 1);
1272 }
1273
1274 static struct remote_lock *lock_remote(const char *path, long timeout)
1275 {
1276 struct active_request_slot *slot;
1277 struct slot_results results;
1278 struct buffer out_buffer;
1279 struct buffer in_buffer;
1280 char *out_data;
1281 char *in_data;
1282 char *url;
1283 char *ep;
1284 char timeout_header[25];
1285 struct remote_lock *lock = NULL;
1286 XML_Parser parser = XML_ParserCreate(NULL);
1287 enum XML_Status result;
1288 struct curl_slist *dav_headers = NULL;
1289 struct xml_ctx ctx;
1290
1291 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1292 sprintf(url, "%s%s", remote->url, path);
1293
1294 /* Make sure leading directories exist for the remote ref */
1295 ep = strchr(url + strlen(remote->url) + 11, '/');
1296 while (ep) {
1297 *ep = 0;
1298 slot = get_active_slot();
1299 slot->results = &results;
1300 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1301 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1302 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1303 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1304 if (start_active_slot(slot)) {
1305 run_active_slot(slot);
1306 if (results.curl_result != CURLE_OK &&
1307 results.http_code != 405) {
1308 fprintf(stderr,
1309 "Unable to create branch path %s\n",
1310 url);
1311 free(url);
1312 return NULL;
1313 }
1314 } else {
1315 fprintf(stderr, "Unable to start MKCOL request\n");
1316 free(url);
1317 return NULL;
1318 }
1319 *ep = '/';
1320 ep = strchr(ep + 1, '/');
1321 }
1322
1323 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1324 out_data = xmalloc(out_buffer.size + 1);
1325 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1326 out_buffer.posn = 0;
1327 out_buffer.buffer = out_data;
1328
1329 in_buffer.size = 4096;
1330 in_data = xmalloc(in_buffer.size);
1331 in_buffer.posn = 0;
1332 in_buffer.buffer = in_data;
1333
1334 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1335 dav_headers = curl_slist_append(dav_headers, timeout_header);
1336 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1337
1338 slot = get_active_slot();
1339 slot->results = &results;
1340 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1341 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1342 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1343 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1344 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1345 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1346 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1347 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1348 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1349
1350 lock = xcalloc(1, sizeof(*lock));
1351 lock->timeout = -1;
1352
1353 if (start_active_slot(slot)) {
1354 run_active_slot(slot);
1355 if (results.curl_result == CURLE_OK) {
1356 ctx.name = xcalloc(10, 1);
1357 ctx.len = 0;
1358 ctx.cdata = NULL;
1359 ctx.userFunc = handle_new_lock_ctx;
1360 ctx.userData = lock;
1361 XML_SetUserData(parser, &ctx);
1362 XML_SetElementHandler(parser, xml_start_tag,
1363 xml_end_tag);
1364 XML_SetCharacterDataHandler(parser, xml_cdata);
1365 result = XML_Parse(parser, in_buffer.buffer,
1366 in_buffer.posn, 1);
1367 free(ctx.name);
1368 if (result != XML_STATUS_OK) {
1369 fprintf(stderr, "XML error: %s\n",
1370 XML_ErrorString(
1371 XML_GetErrorCode(parser)));
1372 lock->timeout = -1;
1373 }
1374 }
1375 } else {
1376 fprintf(stderr, "Unable to start LOCK request\n");
1377 }
1378
1379 curl_slist_free_all(dav_headers);
1380 free(out_data);
1381 free(in_data);
1382
1383 if (lock->token == NULL || lock->timeout <= 0) {
1384 if (lock->token != NULL)
1385 free(lock->token);
1386 if (lock->owner != NULL)
1387 free(lock->owner);
1388 free(url);
1389 free(lock);
1390 lock = NULL;
1391 } else {
1392 lock->url = url;
1393 lock->start_time = time(NULL);
1394 lock->next = remote->locks;
1395 remote->locks = lock;
1396 }
1397
1398 return lock;
1399 }
1400
1401 static int unlock_remote(struct remote_lock *lock)
1402 {
1403 struct active_request_slot *slot;
1404 struct slot_results results;
1405 struct remote_lock *prev = remote->locks;
1406 char *lock_token_header;
1407 struct curl_slist *dav_headers = NULL;
1408 int rc = 0;
1409
1410 lock_token_header = xmalloc(strlen(lock->token) + 31);
1411 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1412 lock->token);
1413 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1414
1415 slot = get_active_slot();
1416 slot->results = &results;
1417 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1418 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1419 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1420 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1421
1422 if (start_active_slot(slot)) {
1423 run_active_slot(slot);
1424 if (results.curl_result == CURLE_OK)
1425 rc = 1;
1426 else
1427 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1428 results.http_code);
1429 } else {
1430 fprintf(stderr, "Unable to start UNLOCK request\n");
1431 }
1432
1433 curl_slist_free_all(dav_headers);
1434 free(lock_token_header);
1435
1436 if (remote->locks == lock) {
1437 remote->locks = lock->next;
1438 } else {
1439 while (prev && prev->next != lock)
1440 prev = prev->next;
1441 if (prev)
1442 prev->next = prev->next->next;
1443 }
1444
1445 if (lock->owner != NULL)
1446 free(lock->owner);
1447 free(lock->url);
1448 free(lock->token);
1449 free(lock);
1450
1451 return rc;
1452 }
1453
1454 static void remote_ls(const char *path, int flags,
1455 void (*userFunc)(struct remote_ls_ctx *ls),
1456 void *userData);
1457
1458 static void process_ls_object(struct remote_ls_ctx *ls)
1459 {
1460 unsigned int *parent = (unsigned int *)ls->userData;
1461 char *path = ls->dentry_name;
1462 char *obj_hex;
1463
1464 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1465 remote_dir_exists[*parent] = 1;
1466 return;
1467 }
1468
1469 if (strlen(path) != 49)
1470 return;
1471 path += 8;
1472 obj_hex = xmalloc(strlen(path));
1473 strlcpy(obj_hex, path, 3);
1474 strcpy(obj_hex + 2, path + 3);
1475 one_remote_object(obj_hex);
1476 free(obj_hex);
1477 }
1478
1479 static void process_ls_ref(struct remote_ls_ctx *ls)
1480 {
1481 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1482 fprintf(stderr, " %s\n", ls->dentry_name);
1483 return;
1484 }
1485
1486 if (!(ls->dentry_flags & IS_DIR))
1487 one_remote_ref(ls->dentry_name);
1488 }
1489
1490 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1491 {
1492 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1493
1494 if (tag_closed) {
1495 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1496 if (ls->dentry_flags & IS_DIR) {
1497 if (ls->flags & PROCESS_DIRS) {
1498 ls->userFunc(ls);
1499 }
1500 if (strcmp(ls->dentry_name, ls->path) &&
1501 ls->flags & RECURSIVE) {
1502 remote_ls(ls->dentry_name,
1503 ls->flags,
1504 ls->userFunc,
1505 ls->userData);
1506 }
1507 } else if (ls->flags & PROCESS_FILES) {
1508 ls->userFunc(ls);
1509 }
1510 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1511 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1512 remote->path_len + 1);
1513 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1514 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1515 ls->dentry_flags |= IS_DIR;
1516 }
1517 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1518 free(ls->dentry_name);
1519 ls->dentry_name = NULL;
1520 ls->dentry_flags = 0;
1521 }
1522 }
1523
1524 static void remote_ls(const char *path, int flags,
1525 void (*userFunc)(struct remote_ls_ctx *ls),
1526 void *userData)
1527 {
1528 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1529 struct active_request_slot *slot;
1530 struct slot_results results;
1531 struct buffer in_buffer;
1532 struct buffer out_buffer;
1533 char *in_data;
1534 char *out_data;
1535 XML_Parser parser = XML_ParserCreate(NULL);
1536 enum XML_Status result;
1537 struct curl_slist *dav_headers = NULL;
1538 struct xml_ctx ctx;
1539 struct remote_ls_ctx ls;
1540
1541 ls.flags = flags;
1542 ls.path = xstrdup(path);
1543 ls.dentry_name = NULL;
1544 ls.dentry_flags = 0;
1545 ls.userData = userData;
1546 ls.userFunc = userFunc;
1547
1548 sprintf(url, "%s%s", remote->url, path);
1549
1550 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1551 out_data = xmalloc(out_buffer.size + 1);
1552 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1553 out_buffer.posn = 0;
1554 out_buffer.buffer = out_data;
1555
1556 in_buffer.size = 4096;
1557 in_data = xmalloc(in_buffer.size);
1558 in_buffer.posn = 0;
1559 in_buffer.buffer = in_data;
1560
1561 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1562 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1563
1564 slot = get_active_slot();
1565 slot->results = &results;
1566 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1567 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1568 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1569 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1570 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1571 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1572 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1573 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1574 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1575
1576 if (start_active_slot(slot)) {
1577 run_active_slot(slot);
1578 if (results.curl_result == CURLE_OK) {
1579 ctx.name = xcalloc(10, 1);
1580 ctx.len = 0;
1581 ctx.cdata = NULL;
1582 ctx.userFunc = handle_remote_ls_ctx;
1583 ctx.userData = &ls;
1584 XML_SetUserData(parser, &ctx);
1585 XML_SetElementHandler(parser, xml_start_tag,
1586 xml_end_tag);
1587 XML_SetCharacterDataHandler(parser, xml_cdata);
1588 result = XML_Parse(parser, in_buffer.buffer,
1589 in_buffer.posn, 1);
1590 free(ctx.name);
1591
1592 if (result != XML_STATUS_OK) {
1593 fprintf(stderr, "XML error: %s\n",
1594 XML_ErrorString(
1595 XML_GetErrorCode(parser)));
1596 }
1597 }
1598 } else {
1599 fprintf(stderr, "Unable to start PROPFIND request\n");
1600 }
1601
1602 free(ls.path);
1603 free(url);
1604 free(out_data);
1605 free(in_buffer.buffer);
1606 curl_slist_free_all(dav_headers);
1607 }
1608
1609 static void get_remote_object_list(unsigned char parent)
1610 {
1611 char path[] = "objects/XX/";
1612 static const char hex[] = "0123456789abcdef";
1613 unsigned int val = parent;
1614
1615 path[8] = hex[val >> 4];
1616 path[9] = hex[val & 0xf];
1617 remote_dir_exists[val] = 0;
1618 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1619 process_ls_object, &val);
1620 }
1621
1622 static int locking_available(void)
1623 {
1624 struct active_request_slot *slot;
1625 struct slot_results results;
1626 struct buffer in_buffer;
1627 struct buffer out_buffer;
1628 char *in_data;
1629 char *out_data;
1630 XML_Parser parser = XML_ParserCreate(NULL);
1631 enum XML_Status result;
1632 struct curl_slist *dav_headers = NULL;
1633 struct xml_ctx ctx;
1634 int lock_flags = 0;
1635
1636 out_buffer.size =
1637 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1638 strlen(remote->url) - 2;
1639 out_data = xmalloc(out_buffer.size + 1);
1640 snprintf(out_data, out_buffer.size + 1,
1641 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1642 out_buffer.posn = 0;
1643 out_buffer.buffer = out_data;
1644
1645 in_buffer.size = 4096;
1646 in_data = xmalloc(in_buffer.size);
1647 in_buffer.posn = 0;
1648 in_buffer.buffer = in_data;
1649
1650 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1651 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1652
1653 slot = get_active_slot();
1654 slot->results = &results;
1655 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1656 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1657 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1658 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1659 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1660 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1661 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1662 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1663 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1664
1665 if (start_active_slot(slot)) {
1666 run_active_slot(slot);
1667 if (results.curl_result == CURLE_OK) {
1668 ctx.name = xcalloc(10, 1);
1669 ctx.len = 0;
1670 ctx.cdata = NULL;
1671 ctx.userFunc = handle_lockprop_ctx;
1672 ctx.userData = &lock_flags;
1673 XML_SetUserData(parser, &ctx);
1674 XML_SetElementHandler(parser, xml_start_tag,
1675 xml_end_tag);
1676 result = XML_Parse(parser, in_buffer.buffer,
1677 in_buffer.posn, 1);
1678 free(ctx.name);
1679
1680 if (result != XML_STATUS_OK) {
1681 fprintf(stderr, "XML error: %s\n",
1682 XML_ErrorString(
1683 XML_GetErrorCode(parser)));
1684 lock_flags = 0;
1685 }
1686 }
1687 } else {
1688 fprintf(stderr, "Unable to start PROPFIND request\n");
1689 }
1690
1691 free(out_data);
1692 free(in_buffer.buffer);
1693 curl_slist_free_all(dav_headers);
1694
1695 return lock_flags;
1696 }
1697
1698 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1699 {
1700 struct object_list *entry = xmalloc(sizeof(struct object_list));
1701 entry->item = obj;
1702 entry->next = *p;
1703 *p = entry;
1704 return &entry->next;
1705 }
1706
1707 static struct object_list **process_blob(struct blob *blob,
1708 struct object_list **p,
1709 struct name_path *path,
1710 const char *name)
1711 {
1712 struct object *obj = &blob->object;
1713
1714 obj->flags |= LOCAL;
1715
1716 if (obj->flags & (UNINTERESTING | SEEN))
1717 return p;
1718
1719 obj->flags |= SEEN;
1720 return add_one_object(obj, p);
1721 }
1722
1723 static struct object_list **process_tree(struct tree *tree,
1724 struct object_list **p,
1725 struct name_path *path,
1726 const char *name)
1727 {
1728 struct object *obj = &tree->object;
1729 struct tree_desc desc;
1730 struct name_entry entry;
1731 struct name_path me;
1732
1733 obj->flags |= LOCAL;
1734
1735 if (obj->flags & (UNINTERESTING | SEEN))
1736 return p;
1737 if (parse_tree(tree) < 0)
1738 die("bad tree object %s", sha1_to_hex(obj->sha1));
1739
1740 obj->flags |= SEEN;
1741 name = xstrdup(name);
1742 p = add_one_object(obj, p);
1743 me.up = path;
1744 me.elem = name;
1745 me.elem_len = strlen(name);
1746
1747 desc.buf = tree->buffer;
1748 desc.size = tree->size;
1749
1750 while (tree_entry(&desc, &entry)) {
1751 if (S_ISDIR(entry.mode))
1752 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1753 else
1754 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1755 }
1756 free(tree->buffer);
1757 tree->buffer = NULL;
1758 return p;
1759 }
1760
1761 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1762 {
1763 int i;
1764 struct commit *commit;
1765 struct object_list **p = &objects;
1766 int count = 0;
1767
1768 while ((commit = get_revision(revs)) != NULL) {
1769 p = process_tree(commit->tree, p, NULL, "");
1770 commit->object.flags |= LOCAL;
1771 if (!(commit->object.flags & UNINTERESTING))
1772 count += add_send_request(&commit->object, lock);
1773 }
1774
1775 for (i = 0; i < revs->pending.nr; i++) {
1776 struct object_array_entry *entry = revs->pending.objects + i;
1777 struct object *obj = entry->item;
1778 const char *name = entry->name;
1779
1780 if (obj->flags & (UNINTERESTING | SEEN))
1781 continue;
1782 if (obj->type == OBJ_TAG) {
1783 obj->flags |= SEEN;
1784 p = add_one_object(obj, p);
1785 continue;
1786 }
1787 if (obj->type == OBJ_TREE) {
1788 p = process_tree((struct tree *)obj, p, NULL, name);
1789 continue;
1790 }
1791 if (obj->type == OBJ_BLOB) {
1792 p = process_blob((struct blob *)obj, p, NULL, name);
1793 continue;
1794 }
1795 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1796 }
1797
1798 while (objects) {
1799 if (!(objects->item->flags & UNINTERESTING))
1800 count += add_send_request(objects->item, lock);
1801 objects = objects->next;
1802 }
1803
1804 return count;
1805 }
1806
1807 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1808 {
1809 struct active_request_slot *slot;
1810 struct slot_results results;
1811 char *out_data;
1812 char *if_header;
1813 struct buffer out_buffer;
1814 struct curl_slist *dav_headers = NULL;
1815 int i;
1816
1817 if_header = xmalloc(strlen(lock->token) + 25);
1818 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1819 dav_headers = curl_slist_append(dav_headers, if_header);
1820
1821 out_buffer.size = 41;
1822 out_data = xmalloc(out_buffer.size + 1);
1823 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1824 if (i != out_buffer.size) {
1825 fprintf(stderr, "Unable to initialize PUT request body\n");
1826 return 0;
1827 }
1828 out_buffer.posn = 0;
1829 out_buffer.buffer = out_data;
1830
1831 slot = get_active_slot();
1832 slot->results = &results;
1833 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1834 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1835 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1836 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1837 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1838 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1839 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1840 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1841 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1842
1843 if (start_active_slot(slot)) {
1844 run_active_slot(slot);
1845 free(out_data);
1846 free(if_header);
1847 if (results.curl_result != CURLE_OK) {
1848 fprintf(stderr,
1849 "PUT error: curl result=%d, HTTP code=%ld\n",
1850 results.curl_result, results.http_code);
1851 /* We should attempt recovery? */
1852 return 0;
1853 }
1854 } else {
1855 free(out_data);
1856 free(if_header);
1857 fprintf(stderr, "Unable to start PUT request\n");
1858 return 0;
1859 }
1860
1861 return 1;
1862 }
1863
1864 static struct ref *local_refs, **local_tail;
1865 static struct ref *remote_refs, **remote_tail;
1866
1867 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1868 {
1869 struct ref *ref;
1870 int len = strlen(refname) + 1;
1871 ref = xcalloc(1, sizeof(*ref) + len);
1872 hashcpy(ref->new_sha1, sha1);
1873 memcpy(ref->name, refname, len);
1874 *local_tail = ref;
1875 local_tail = &ref->next;
1876 return 0;
1877 }
1878
1879 static void one_remote_ref(char *refname)
1880 {
1881 struct ref *ref;
1882 unsigned char remote_sha1[20];
1883 struct object *obj;
1884 int len = strlen(refname) + 1;
1885
1886 if (fetch_ref(refname, remote_sha1) != 0) {
1887 fprintf(stderr,
1888 "Unable to fetch ref %s from %s\n",
1889 refname, remote->url);
1890 return;
1891 }
1892
1893 /*
1894 * Fetch a copy of the object if it doesn't exist locally - it
1895 * may be required for updating server info later.
1896 */
1897 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1898 obj = lookup_unknown_object(remote_sha1);
1899 if (obj) {
1900 fprintf(stderr, " fetch %s for %s\n",
1901 sha1_to_hex(remote_sha1), refname);
1902 add_fetch_request(obj);
1903 }
1904 }
1905
1906 ref = xcalloc(1, sizeof(*ref) + len);
1907 hashcpy(ref->old_sha1, remote_sha1);
1908 memcpy(ref->name, refname, len);
1909 *remote_tail = ref;
1910 remote_tail = &ref->next;
1911 }
1912
1913 static void get_local_heads(void)
1914 {
1915 local_tail = &local_refs;
1916 for_each_ref(one_local_ref, NULL);
1917 }
1918
1919 static void get_dav_remote_heads(void)
1920 {
1921 remote_tail = &remote_refs;
1922 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1923 }
1924
1925 static int is_zero_sha1(const unsigned char *sha1)
1926 {
1927 int i;
1928
1929 for (i = 0; i < 20; i++) {
1930 if (*sha1++)
1931 return 0;
1932 }
1933 return 1;
1934 }
1935
1936 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1937 {
1938 while (list) {
1939 struct commit_list *temp = list;
1940 temp->item->object.flags &= ~mark;
1941 list = temp->next;
1942 free(temp);
1943 }
1944 }
1945
1946 static int ref_newer(const unsigned char *new_sha1,
1947 const unsigned char *old_sha1)
1948 {
1949 struct object *o;
1950 struct commit *old, *new;
1951 struct commit_list *list, *used;
1952 int found = 0;
1953
1954 /* Both new and old must be commit-ish and new is descendant of
1955 * old. Otherwise we require --force.
1956 */
1957 o = deref_tag(parse_object(old_sha1), NULL, 0);
1958 if (!o || o->type != OBJ_COMMIT)
1959 return 0;
1960 old = (struct commit *) o;
1961
1962 o = deref_tag(parse_object(new_sha1), NULL, 0);
1963 if (!o || o->type != OBJ_COMMIT)
1964 return 0;
1965 new = (struct commit *) o;
1966
1967 if (parse_commit(new) < 0)
1968 return 0;
1969
1970 used = list = NULL;
1971 commit_list_insert(new, &list);
1972 while (list) {
1973 new = pop_most_recent_commit(&list, TMP_MARK);
1974 commit_list_insert(new, &used);
1975 if (new == old) {
1976 found = 1;
1977 break;
1978 }
1979 }
1980 unmark_and_free(list, TMP_MARK);
1981 unmark_and_free(used, TMP_MARK);
1982 return found;
1983 }
1984
1985 static void mark_edge_parents_uninteresting(struct commit *commit)
1986 {
1987 struct commit_list *parents;
1988
1989 for (parents = commit->parents; parents; parents = parents->next) {
1990 struct commit *parent = parents->item;
1991 if (!(parent->object.flags & UNINTERESTING))
1992 continue;
1993 mark_tree_uninteresting(parent->tree);
1994 }
1995 }
1996
1997 static void mark_edges_uninteresting(struct commit_list *list)
1998 {
1999 for ( ; list; list = list->next) {
2000 struct commit *commit = list->item;
2001
2002 if (commit->object.flags & UNINTERESTING) {
2003 mark_tree_uninteresting(commit->tree);
2004 continue;
2005 }
2006 mark_edge_parents_uninteresting(commit);
2007 }
2008 }
2009
2010 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2011 {
2012 struct buffer *buf = (struct buffer *)ls->userData;
2013 unsigned char remote_sha1[20];
2014 struct object *o;
2015 int len;
2016 char *ref_info;
2017
2018 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2019 fprintf(stderr,
2020 "Unable to fetch ref %s from %s\n",
2021 ls->dentry_name, remote->url);
2022 aborted = 1;
2023 return;
2024 }
2025
2026 o = parse_object(remote_sha1);
2027 if (!o) {
2028 fprintf(stderr,
2029 "Unable to parse object %s for remote ref %s\n",
2030 sha1_to_hex(remote_sha1), ls->dentry_name);
2031 aborted = 1;
2032 return;
2033 }
2034
2035 len = strlen(ls->dentry_name) + 42;
2036 ref_info = xcalloc(len + 1, 1);
2037 sprintf(ref_info, "%s %s\n",
2038 sha1_to_hex(remote_sha1), ls->dentry_name);
2039 fwrite_buffer(ref_info, 1, len, buf);
2040 free(ref_info);
2041
2042 if (o->type == OBJ_TAG) {
2043 o = deref_tag(o, ls->dentry_name, 0);
2044 if (o) {
2045 len = strlen(ls->dentry_name) + 45;
2046 ref_info = xcalloc(len + 1, 1);
2047 sprintf(ref_info, "%s %s^{}\n",
2048 sha1_to_hex(o->sha1), ls->dentry_name);
2049 fwrite_buffer(ref_info, 1, len, buf);
2050 free(ref_info);
2051 }
2052 }
2053 }
2054
2055 static void update_remote_info_refs(struct remote_lock *lock)
2056 {
2057 struct buffer buffer;
2058 struct active_request_slot *slot;
2059 struct slot_results results;
2060 char *if_header;
2061 struct curl_slist *dav_headers = NULL;
2062
2063 buffer.buffer = xcalloc(1, 4096);
2064 buffer.size = 4096;
2065 buffer.posn = 0;
2066 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2067 add_remote_info_ref, &buffer);
2068 if (!aborted) {
2069 if_header = xmalloc(strlen(lock->token) + 25);
2070 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2071 dav_headers = curl_slist_append(dav_headers, if_header);
2072
2073 slot = get_active_slot();
2074 slot->results = &results;
2075 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2076 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2077 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2078 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2079 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2080 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2081 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2082 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2083 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2084
2085 buffer.posn = 0;
2086
2087 if (start_active_slot(slot)) {
2088 run_active_slot(slot);
2089 if (results.curl_result != CURLE_OK) {
2090 fprintf(stderr,
2091 "PUT error: curl result=%d, HTTP code=%ld\n",
2092 results.curl_result, results.http_code);
2093 }
2094 }
2095 free(if_header);
2096 }
2097 free(buffer.buffer);
2098 }
2099
2100 static int remote_exists(const char *path)
2101 {
2102 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2103 struct active_request_slot *slot;
2104 struct slot_results results;
2105
2106 sprintf(url, "%s%s", remote->url, path);
2107
2108 slot = get_active_slot();
2109 slot->results = &results;
2110 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2111 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2112
2113 if (start_active_slot(slot)) {
2114 run_active_slot(slot);
2115 if (results.http_code == 404)
2116 return 0;
2117 else if (results.curl_result == CURLE_OK)
2118 return 1;
2119 else
2120 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2121 } else {
2122 fprintf(stderr, "Unable to start HEAD request\n");
2123 }
2124
2125 return -1;
2126 }
2127
2128 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2129 {
2130 char *url;
2131 struct buffer buffer;
2132 struct active_request_slot *slot;
2133 struct slot_results results;
2134
2135 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2136 sprintf(url, "%s%s", remote->url, path);
2137
2138 buffer.size = 4096;
2139 buffer.posn = 0;
2140 buffer.buffer = xmalloc(buffer.size);
2141
2142 slot = get_active_slot();
2143 slot->results = &results;
2144 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2145 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2146 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2147 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2148 if (start_active_slot(slot)) {
2149 run_active_slot(slot);
2150 if (results.curl_result != CURLE_OK) {
2151 die("Couldn't get %s for remote symref\n%s",
2152 url, curl_errorstr);
2153 }
2154 } else {
2155 die("Unable to start remote symref request");
2156 }
2157 free(url);
2158
2159 if (*symref != NULL)
2160 free(*symref);
2161 *symref = NULL;
2162 hashclr(sha1);
2163
2164 if (buffer.posn == 0)
2165 return;
2166
2167 /* If it's a symref, set the refname; otherwise try for a sha1 */
2168 if (!strncmp((char *)buffer.buffer, "ref: ", 5)) {
2169 *symref = xmalloc(buffer.posn - 5);
2170 strlcpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 5);
2171 } else {
2172 get_sha1_hex(buffer.buffer, sha1);
2173 }
2174
2175 free(buffer.buffer);
2176 }
2177
2178 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2179 {
2180 struct commit *head = lookup_commit(head_sha1);
2181 struct commit *branch = lookup_commit(branch_sha1);
2182 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2183
2184 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2185 }
2186
2187 static int delete_remote_branch(char *pattern, int force)
2188 {
2189 struct ref *refs = remote_refs;
2190 struct ref *remote_ref = NULL;
2191 unsigned char head_sha1[20];
2192 char *symref = NULL;
2193 int match;
2194 int patlen = strlen(pattern);
2195 int i;
2196 struct active_request_slot *slot;
2197 struct slot_results results;
2198 char *url;
2199
2200 /* Find the remote branch(es) matching the specified branch name */
2201 for (match = 0; refs; refs = refs->next) {
2202 char *name = refs->name;
2203 int namelen = strlen(name);
2204 if (namelen < patlen ||
2205 memcmp(name + namelen - patlen, pattern, patlen))
2206 continue;
2207 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2208 continue;
2209 match++;
2210 remote_ref = refs;
2211 }
2212 if (match == 0)
2213 return error("No remote branch matches %s", pattern);
2214 if (match != 1)
2215 return error("More than one remote branch matches %s",
2216 pattern);
2217
2218 /*
2219 * Remote HEAD must be a symref (not exactly foolproof; a remote
2220 * symlink to a symref will look like a symref)
2221 */
2222 fetch_symref("HEAD", &symref, head_sha1);
2223 if (!symref)
2224 return error("Remote HEAD is not a symref");
2225
2226 /* Remote branch must not be the remote HEAD */
2227 for (i=0; symref && i<MAXDEPTH; i++) {
2228 if (!strcmp(remote_ref->name, symref))
2229 return error("Remote branch %s is the current HEAD",
2230 remote_ref->name);
2231 fetch_symref(symref, &symref, head_sha1);
2232 }
2233
2234 /* Run extra sanity checks if delete is not forced */
2235 if (!force) {
2236 /* Remote HEAD must resolve to a known object */
2237 if (symref)
2238 return error("Remote HEAD symrefs too deep");
2239 if (is_zero_sha1(head_sha1))
2240 return error("Unable to resolve remote HEAD");
2241 if (!has_sha1_file(head_sha1))
2242 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2243
2244 /* Remote branch must resolve to a known object */
2245 if (is_zero_sha1(remote_ref->old_sha1))
2246 return error("Unable to resolve remote branch %s",
2247 remote_ref->name);
2248 if (!has_sha1_file(remote_ref->old_sha1))
2249 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));
2250
2251 /* Remote branch must be an ancestor of remote HEAD */
2252 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2253 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);
2254 }
2255 }
2256
2257 /* Send delete request */
2258 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2259 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2260 sprintf(url, "%s%s", remote->url, remote_ref->name);
2261 slot = get_active_slot();
2262 slot->results = &results;
2263 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2264 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2265 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2266 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2267 if (start_active_slot(slot)) {
2268 run_active_slot(slot);
2269 free(url);
2270 if (results.curl_result != CURLE_OK)
2271 return error("DELETE request failed (%d/%ld)\n",
2272 results.curl_result, results.http_code);
2273 } else {
2274 free(url);
2275 return error("Unable to start DELETE request");
2276 }
2277
2278 return 0;
2279 }
2280
2281 int main(int argc, char **argv)
2282 {
2283 struct transfer_request *request;
2284 struct transfer_request *next_request;
2285 int nr_refspec = 0;
2286 char **refspec = NULL;
2287 struct remote_lock *ref_lock = NULL;
2288 struct remote_lock *info_ref_lock = NULL;
2289 struct rev_info revs;
2290 int delete_branch = 0;
2291 int force_delete = 0;
2292 int objects_to_send;
2293 int rc = 0;
2294 int i;
2295 int new_refs;
2296 struct ref *ref;
2297
2298 setup_git_directory();
2299 setup_ident();
2300
2301 remote = xcalloc(sizeof(*remote), 1);
2302
2303 argv++;
2304 for (i = 1; i < argc; i++, argv++) {
2305 char *arg = *argv;
2306
2307 if (*arg == '-') {
2308 if (!strcmp(arg, "--all")) {
2309 push_all = 1;
2310 continue;
2311 }
2312 if (!strcmp(arg, "--force")) {
2313 force_all = 1;
2314 continue;
2315 }
2316 if (!strcmp(arg, "--verbose")) {
2317 push_verbosely = 1;
2318 continue;
2319 }
2320 if (!strcmp(arg, "-d")) {
2321 delete_branch = 1;
2322 continue;
2323 }
2324 if (!strcmp(arg, "-D")) {
2325 delete_branch = 1;
2326 force_delete = 1;
2327 continue;
2328 }
2329 }
2330 if (!remote->url) {
2331 char *path = strstr(arg, "//");
2332 remote->url = arg;
2333 if (path) {
2334 path = strchr(path+2, '/');
2335 if (path)
2336 remote->path_len = strlen(path);
2337 }
2338 continue;
2339 }
2340 refspec = argv;
2341 nr_refspec = argc - i;
2342 break;
2343 }
2344
2345 if (!remote->url)
2346 usage(http_push_usage);
2347
2348 if (delete_branch && nr_refspec != 1)
2349 die("You must specify only one branch name when deleting a remote branch");
2350
2351 memset(remote_dir_exists, -1, 256);
2352
2353 http_init();
2354
2355 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2356 default_headers = curl_slist_append(default_headers, "Range:");
2357 default_headers = curl_slist_append(default_headers, "Destination:");
2358 default_headers = curl_slist_append(default_headers, "If:");
2359 default_headers = curl_slist_append(default_headers,
2360 "Pragma: no-cache");
2361
2362 /* Verify DAV compliance/lock support */
2363 if (!locking_available()) {
2364 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2365 rc = 1;
2366 goto cleanup;
2367 }
2368
2369 /* Check whether the remote has server info files */
2370 remote->can_update_info_refs = 0;
2371 remote->has_info_refs = remote_exists("info/refs");
2372 remote->has_info_packs = remote_exists("objects/info/packs");
2373 if (remote->has_info_refs) {
2374 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2375 if (info_ref_lock)
2376 remote->can_update_info_refs = 1;
2377 }
2378 if (remote->has_info_packs)
2379 fetch_indices();
2380
2381 /* Get a list of all local and remote heads to validate refspecs */
2382 get_local_heads();
2383 fprintf(stderr, "Fetching remote heads...\n");
2384 get_dav_remote_heads();
2385
2386 /* Remove a remote branch if -d or -D was specified */
2387 if (delete_branch) {
2388 if (delete_remote_branch(refspec[0], force_delete) == -1)
2389 fprintf(stderr, "Unable to delete remote branch %s\n",
2390 refspec[0]);
2391 goto cleanup;
2392 }
2393
2394 /* match them up */
2395 if (!remote_tail)
2396 remote_tail = &remote_refs;
2397 if (match_refs(local_refs, remote_refs, &remote_tail,
2398 nr_refspec, refspec, push_all))
2399 return -1;
2400 if (!remote_refs) {
2401 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2402 return 0;
2403 }
2404
2405 new_refs = 0;
2406 for (ref = remote_refs; ref; ref = ref->next) {
2407 char old_hex[60], *new_hex;
2408 const char *commit_argv[4];
2409 int commit_argc;
2410 char *new_sha1_hex, *old_sha1_hex;
2411
2412 if (!ref->peer_ref)
2413 continue;
2414 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2415 if (push_verbosely || 1)
2416 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2417 continue;
2418 }
2419
2420 if (!force_all &&
2421 !is_zero_sha1(ref->old_sha1) &&
2422 !ref->force) {
2423 if (!has_sha1_file(ref->old_sha1) ||
2424 !ref_newer(ref->peer_ref->new_sha1,
2425 ref->old_sha1)) {
2426 /* We do not have the remote ref, or
2427 * we know that the remote ref is not
2428 * an ancestor of what we are trying to
2429 * push. Either way this can be losing
2430 * commits at the remote end and likely
2431 * we were not up to date to begin with.
2432 */
2433 error("remote '%s' is not a strict "
2434 "subset of local ref '%s'. "
2435 "maybe you are not up-to-date and "
2436 "need to pull first?",
2437 ref->name,
2438 ref->peer_ref->name);
2439 rc = -2;
2440 continue;
2441 }
2442 }
2443 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2444 if (is_zero_sha1(ref->new_sha1)) {
2445 error("cannot happen anymore");
2446 rc = -3;
2447 continue;
2448 }
2449 new_refs++;
2450 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2451 new_hex = sha1_to_hex(ref->new_sha1);
2452
2453 fprintf(stderr, "updating '%s'", ref->name);
2454 if (strcmp(ref->name, ref->peer_ref->name))
2455 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2456 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2457
2458
2459 /* Lock remote branch ref */
2460 ref_lock = lock_remote(ref->name, LOCK_TIME);
2461 if (ref_lock == NULL) {
2462 fprintf(stderr, "Unable to lock remote branch %s\n",
2463 ref->name);
2464 rc = 1;
2465 continue;
2466 }
2467
2468 /* Set up revision info for this refspec */
2469 commit_argc = 3;
2470 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2471 old_sha1_hex = NULL;
2472 commit_argv[1] = "--objects";
2473 commit_argv[2] = new_sha1_hex;
2474 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2475 old_sha1_hex = xmalloc(42);
2476 sprintf(old_sha1_hex, "^%s",
2477 sha1_to_hex(ref->old_sha1));
2478 commit_argv[3] = old_sha1_hex;
2479 commit_argc++;
2480 }
2481 init_revisions(&revs, setup_git_directory());
2482 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2483 free(new_sha1_hex);
2484 if (old_sha1_hex) {
2485 free(old_sha1_hex);
2486 commit_argv[1] = NULL;
2487 }
2488
2489 /* Generate a list of objects that need to be pushed */
2490 pushing = 0;
2491 prepare_revision_walk(&revs);
2492 mark_edges_uninteresting(revs.commits);
2493 objects_to_send = get_delta(&revs, ref_lock);
2494 finish_all_active_slots();
2495
2496 /* Push missing objects to remote, this would be a
2497 convenient time to pack them first if appropriate. */
2498 pushing = 1;
2499 if (objects_to_send)
2500 fprintf(stderr, " sending %d objects\n",
2501 objects_to_send);
2502 #ifdef USE_CURL_MULTI
2503 fill_active_slots();
2504 #endif
2505 finish_all_active_slots();
2506
2507 /* Update the remote branch if all went well */
2508 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2509 rc = 1;
2510 goto unlock;
2511 }
2512
2513 unlock:
2514 if (!rc)
2515 fprintf(stderr, " done\n");
2516 unlock_remote(ref_lock);
2517 check_locks();
2518 }
2519
2520 /* Update remote server info if appropriate */
2521 if (remote->has_info_refs && new_refs) {
2522 if (info_ref_lock && remote->can_update_info_refs) {
2523 fprintf(stderr, "Updating remote server info\n");
2524 update_remote_info_refs(info_ref_lock);
2525 } else {
2526 fprintf(stderr, "Unable to update server info\n");
2527 }
2528 }
2529 if (info_ref_lock)
2530 unlock_remote(info_ref_lock);
2531
2532 cleanup:
2533 free(remote);
2534
2535 curl_slist_free_all(no_pragma_header);
2536 curl_slist_free_all(default_headers);
2537
2538 http_cleanup();
2539
2540 request = request_queue_head;
2541 while (request != NULL) {
2542 next_request = request->next;
2543 release_request(request);
2544 request = next_request;
2545 }
2546
2547 return rc;
2548 }
peff's git enhancements