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Reimplement rename()
[git/pclouds.git] / http-push.c
blob7c3720f602bb8f50ed54a4f7e7a85c7e08d1c07b
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 #include "remote.h"
13
14 #include <expat.h>
15
16 static const char http_push_usage[] =
17 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
18
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21 XML_STATUS_OK = 1,
22 XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK 1
25 #define XML_STATUS_ERROR 0
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
39
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
44
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
55
56 /* DAV request body templates */
57 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
60
61 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
63
64 /* bits #0-15 in revision.h */
65
66 #define LOCAL (1u<<16)
67 #define REMOTE (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING (1u<<19)
70
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
73
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
77
78 static struct curl_slist *no_pragma_header;
79 static struct curl_slist *default_headers;
80
81 static int push_verbosely;
82 static int push_all;
83 static int force_all;
84
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 int path_len;
91 int has_info_refs;
92 int can_update_info_refs;
93 int has_info_packs;
94 struct packed_git *packs;
95 struct remote_lock *locks;
96 };
97
98 static struct repo *remote;
99
100 enum transfer_state {
101 NEED_FETCH,
102 RUN_FETCH_LOOSE,
103 RUN_FETCH_PACKED,
104 NEED_PUSH,
105 RUN_MKCOL,
106 RUN_PUT,
107 RUN_MOVE,
108 ABORTED,
109 COMPLETE,
110 };
111
112 struct transfer_request
113 {
114 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 char filename[PATH_MAX];
121 char tmpfile[PATH_MAX];
122 int local_fileno;
123 FILE *local_stream;
124 enum transfer_state state;
125 CURLcode curl_result;
126 char errorstr[CURL_ERROR_SIZE];
127 long http_code;
128 unsigned char real_sha1[20];
129 SHA_CTX c;
130 z_stream stream;
131 int zret;
132 int rename;
133 void *userData;
134 struct active_request_slot *slot;
135 struct transfer_request *next;
136 };
137
138 static struct transfer_request *request_queue_head;
139
140 struct xml_ctx
141 {
142 char *name;
143 int len;
144 char *cdata;
145 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
146 void *userData;
147 };
148
149 struct remote_lock
150 {
151 char *url;
152 char *owner;
153 char *token;
154 time_t start_time;
155 long timeout;
156 int refreshing;
157 struct remote_lock *next;
158 };
159
160 /* Flags that control remote_ls processing */
161 #define PROCESS_FILES (1u << 0)
162 #define PROCESS_DIRS (1u << 1)
163 #define RECURSIVE (1u << 2)
164
165 /* Flags that remote_ls passes to callback functions */
166 #define IS_DIR (1u << 0)
167
168 struct remote_ls_ctx
169 {
170 char *path;
171 void (*userFunc)(struct remote_ls_ctx *ls);
172 void *userData;
173 int flags;
174 char *dentry_name;
175 int dentry_flags;
176 struct remote_ls_ctx *parent;
177 };
178
179 static void finish_request(struct transfer_request *request);
180 static void release_request(struct transfer_request *request);
181
182 static void process_response(void *callback_data)
183 {
184 struct transfer_request *request =
185 (struct transfer_request *)callback_data;
186
187 finish_request(request);
188 }
189
190 #ifdef USE_CURL_MULTI
191 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
192 void *data)
193 {
194 unsigned char expn[4096];
195 size_t size = eltsize * nmemb;
196 int posn = 0;
197 struct transfer_request *request = (struct transfer_request *)data;
198 do {
199 ssize_t retval = xwrite(request->local_fileno,
200 (char *) ptr + posn, size - posn);
201 if (retval < 0)
202 return posn;
203 posn += retval;
204 } while (posn < size);
205
206 request->stream.avail_in = size;
207 request->stream.next_in = ptr;
208 do {
209 request->stream.next_out = expn;
210 request->stream.avail_out = sizeof(expn);
211 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
212 SHA1_Update(&request->c, expn,
213 sizeof(expn) - request->stream.avail_out);
214 } while (request->stream.avail_in && request->zret == Z_OK);
215 data_received++;
216 return size;
217 }
218
219 static void start_fetch_loose(struct transfer_request *request)
220 {
221 char *hex = sha1_to_hex(request->obj->sha1);
222 char *filename;
223 char prevfile[PATH_MAX];
224 char *url;
225 char *posn;
226 int prevlocal;
227 unsigned char prev_buf[PREV_BUF_SIZE];
228 ssize_t prev_read = 0;
229 long prev_posn = 0;
230 char range[RANGE_HEADER_SIZE];
231 struct curl_slist *range_header = NULL;
232 struct active_request_slot *slot;
233
234 filename = sha1_file_name(request->obj->sha1);
235 snprintf(request->filename, sizeof(request->filename), "%s", filename);
236 snprintf(request->tmpfile, sizeof(request->tmpfile),
237 "%s.temp", filename);
238
239 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
240 unlink(prevfile);
241 rename(request->tmpfile, prevfile);
242 unlink(request->tmpfile);
243
244 if (request->local_fileno != -1)
245 error("fd leakage in start: %d", request->local_fileno);
246 request->local_fileno = open(request->tmpfile,
247 O_WRONLY | O_CREAT | O_EXCL, 0666);
248 /* This could have failed due to the "lazy directory creation";
249 * try to mkdir the last path component.
250 */
251 if (request->local_fileno < 0 && errno == ENOENT) {
252 char *dir = strrchr(request->tmpfile, '/');
253 if (dir) {
254 *dir = 0;
255 mkdir(request->tmpfile, 0777);
256 *dir = '/';
257 }
258 request->local_fileno = open(request->tmpfile,
259 O_WRONLY | O_CREAT | O_EXCL, 0666);
260 }
261
262 if (request->local_fileno < 0) {
263 request->state = ABORTED;
264 error("Couldn't create temporary file %s for %s: %s",
265 request->tmpfile, request->filename, strerror(errno));
266 return;
267 }
268
269 memset(&request->stream, 0, sizeof(request->stream));
270
271 inflateInit(&request->stream);
272
273 SHA1_Init(&request->c);
274
275 url = xmalloc(strlen(remote->url) + 50);
276 request->url = xmalloc(strlen(remote->url) + 50);
277 strcpy(url, remote->url);
278 posn = url + strlen(remote->url);
279 strcpy(posn, "objects/");
280 posn += 8;
281 memcpy(posn, hex, 2);
282 posn += 2;
283 *(posn++) = '/';
284 strcpy(posn, hex + 2);
285 strcpy(request->url, url);
286
287 /* If a previous temp file is present, process what was already
288 fetched. */
289 prevlocal = open(prevfile, O_RDONLY);
290 if (prevlocal != -1) {
291 do {
292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
293 if (prev_read>0) {
294 if (fwrite_sha1_file(prev_buf,
295 1,
296 prev_read,
297 request) == prev_read) {
298 prev_posn += prev_read;
299 } else {
300 prev_read = -1;
301 }
302 }
303 } while (prev_read > 0);
304 close(prevlocal);
305 }
306 unlink(prevfile);
307
308 /* Reset inflate/SHA1 if there was an error reading the previous temp
309 file; also rewind to the beginning of the local file. */
310 if (prev_read == -1) {
311 memset(&request->stream, 0, sizeof(request->stream));
312 inflateInit(&request->stream);
313 SHA1_Init(&request->c);
314 if (prev_posn>0) {
315 prev_posn = 0;
316 lseek(request->local_fileno, 0, SEEK_SET);
317 ftruncate(request->local_fileno, 0);
318 }
319 }
320
321 slot = get_active_slot();
322 slot->callback_func = process_response;
323 slot->callback_data = request;
324 request->slot = slot;
325
326 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
327 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
328 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
329 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
330 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
331
332 /* If we have successfully processed data from a previous fetch
333 attempt, only fetch the data we don't already have. */
334 if (prev_posn>0) {
335 if (push_verbosely)
336 fprintf(stderr,
337 "Resuming fetch of object %s at byte %ld\n",
338 hex, prev_posn);
339 sprintf(range, "Range: bytes=%ld-", prev_posn);
340 range_header = curl_slist_append(range_header, range);
341 curl_easy_setopt(slot->curl,
342 CURLOPT_HTTPHEADER, range_header);
343 }
344
345 /* Try to get the request started, abort the request on error */
346 request->state = RUN_FETCH_LOOSE;
347 if (!start_active_slot(slot)) {
348 fprintf(stderr, "Unable to start GET request\n");
349 remote->can_update_info_refs = 0;
350 release_request(request);
351 }
352 }
353
354 static void start_mkcol(struct transfer_request *request)
355 {
356 char *hex = sha1_to_hex(request->obj->sha1);
357 struct active_request_slot *slot;
358 char *posn;
359
360 request->url = xmalloc(strlen(remote->url) + 13);
361 strcpy(request->url, remote->url);
362 posn = request->url + strlen(remote->url);
363 strcpy(posn, "objects/");
364 posn += 8;
365 memcpy(posn, hex, 2);
366 posn += 2;
367 strcpy(posn, "/");
368
369 slot = get_active_slot();
370 slot->callback_func = process_response;
371 slot->callback_data = request;
372 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
373 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
374 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
375 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
376 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
377
378 if (start_active_slot(slot)) {
379 request->slot = slot;
380 request->state = RUN_MKCOL;
381 } else {
382 request->state = ABORTED;
383 free(request->url);
384 request->url = NULL;
385 }
386 }
387 #endif
388
389 static void start_fetch_packed(struct transfer_request *request)
390 {
391 char *url;
392 struct packed_git *target;
393 FILE *packfile;
394 char *filename;
395 long prev_posn = 0;
396 char range[RANGE_HEADER_SIZE];
397 struct curl_slist *range_header = NULL;
398
399 struct transfer_request *check_request = request_queue_head;
400 struct active_request_slot *slot;
401
402 target = find_sha1_pack(request->obj->sha1, remote->packs);
403 if (!target) {
404 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
405 remote->can_update_info_refs = 0;
406 release_request(request);
407 return;
408 }
409
410 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
411 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
412
413 filename = sha1_pack_name(target->sha1);
414 snprintf(request->filename, sizeof(request->filename), "%s", filename);
415 snprintf(request->tmpfile, sizeof(request->tmpfile),
416 "%s.temp", filename);
417
418 url = xmalloc(strlen(remote->url) + 64);
419 sprintf(url, "%sobjects/pack/pack-%s.pack",
420 remote->url, sha1_to_hex(target->sha1));
421
422 /* Make sure there isn't another open request for this pack */
423 while (check_request) {
424 if (check_request->state == RUN_FETCH_PACKED &&
425 !strcmp(check_request->url, url)) {
426 free(url);
427 release_request(request);
428 return;
429 }
430 check_request = check_request->next;
431 }
432
433 packfile = fopen(request->tmpfile, "a");
434 if (!packfile) {
435 fprintf(stderr, "Unable to open local file %s for pack",
436 filename);
437 remote->can_update_info_refs = 0;
438 free(url);
439 return;
440 }
441
442 slot = get_active_slot();
443 slot->callback_func = process_response;
444 slot->callback_data = request;
445 request->slot = slot;
446 request->local_stream = packfile;
447 request->userData = target;
448
449 request->url = url;
450 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
451 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
452 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
454 slot->local = packfile;
455
456 /* If there is data present from a previous transfer attempt,
457 resume where it left off */
458 prev_posn = ftell(packfile);
459 if (prev_posn>0) {
460 if (push_verbosely)
461 fprintf(stderr,
462 "Resuming fetch of pack %s at byte %ld\n",
463 sha1_to_hex(target->sha1), prev_posn);
464 sprintf(range, "Range: bytes=%ld-", prev_posn);
465 range_header = curl_slist_append(range_header, range);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
467 }
468
469 /* Try to get the request started, abort the request on error */
470 request->state = RUN_FETCH_PACKED;
471 if (!start_active_slot(slot)) {
472 fprintf(stderr, "Unable to start GET request\n");
473 remote->can_update_info_refs = 0;
474 release_request(request);
475 }
476 }
477
478 static void start_put(struct transfer_request *request)
479 {
480 char *hex = sha1_to_hex(request->obj->sha1);
481 struct active_request_slot *slot;
482 char *posn;
483 enum object_type type;
484 char hdr[50];
485 void *unpacked;
486 unsigned long len;
487 int hdrlen;
488 ssize_t size;
489 z_stream stream;
490
491 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
492 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
493
494 /* Set it up */
495 memset(&stream, 0, sizeof(stream));
496 deflateInit(&stream, zlib_compression_level);
497 size = deflateBound(&stream, len + hdrlen);
498 request->buffer.buffer = xmalloc(size);
499
500 /* Compress it */
501 stream.next_out = request->buffer.buffer;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.size = stream.total_out;
519 request->buffer.posn = 0;
520
521 request->url = xmalloc(strlen(remote->url) +
522 strlen(request->lock->token) + 51);
523 strcpy(request->url, remote->url);
524 posn = request->url + strlen(remote->url);
525 strcpy(posn, "objects/");
526 posn += 8;
527 memcpy(posn, hex, 2);
528 posn += 2;
529 *(posn++) = '/';
530 strcpy(posn, hex + 2);
531 request->dest = xmalloc(strlen(request->url) + 14);
532 sprintf(request->dest, "Destination: %s", request->url);
533 posn += 38;
534 *(posn++) = '_';
535 strcpy(posn, request->lock->token);
536
537 slot = get_active_slot();
538 slot->callback_func = process_response;
539 slot->callback_data = request;
540 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
541 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
543 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
544 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
545 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
547 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
548 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
549
550 if (start_active_slot(slot)) {
551 request->slot = slot;
552 request->state = RUN_PUT;
553 } else {
554 request->state = ABORTED;
555 free(request->url);
556 request->url = NULL;
557 }
558 }
559
560 static void start_move(struct transfer_request *request)
561 {
562 struct active_request_slot *slot;
563 struct curl_slist *dav_headers = NULL;
564
565 slot = get_active_slot();
566 slot->callback_func = process_response;
567 slot->callback_data = request;
568 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
569 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
570 dav_headers = curl_slist_append(dav_headers, request->dest);
571 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
572 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
573 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
574 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
575
576 if (start_active_slot(slot)) {
577 request->slot = slot;
578 request->state = RUN_MOVE;
579 } else {
580 request->state = ABORTED;
581 free(request->url);
582 request->url = NULL;
583 }
584 }
585
586 static int refresh_lock(struct remote_lock *lock)
587 {
588 struct active_request_slot *slot;
589 struct slot_results results;
590 char *if_header;
591 char timeout_header[25];
592 struct curl_slist *dav_headers = NULL;
593 int rc = 0;
594
595 lock->refreshing = 1;
596
597 if_header = xmalloc(strlen(lock->token) + 25);
598 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
599 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
600 dav_headers = curl_slist_append(dav_headers, if_header);
601 dav_headers = curl_slist_append(dav_headers, timeout_header);
602
603 slot = get_active_slot();
604 slot->results = &results;
605 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
606 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
607 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
608 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
609 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
610
611 if (start_active_slot(slot)) {
612 run_active_slot(slot);
613 if (results.curl_result != CURLE_OK) {
614 fprintf(stderr, "LOCK HTTP error %ld\n",
615 results.http_code);
616 } else {
617 lock->start_time = time(NULL);
618 rc = 1;
619 }
620 }
621
622 lock->refreshing = 0;
623 curl_slist_free_all(dav_headers);
624 free(if_header);
625
626 return rc;
627 }
628
629 static void check_locks(void)
630 {
631 struct remote_lock *lock = remote->locks;
632 time_t current_time = time(NULL);
633 int time_remaining;
634
635 while (lock) {
636 time_remaining = lock->start_time + lock->timeout -
637 current_time;
638 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
639 if (!refresh_lock(lock)) {
640 fprintf(stderr,
641 "Unable to refresh lock for %s\n",
642 lock->url);
643 aborted = 1;
644 return;
645 }
646 }
647 lock = lock->next;
648 }
649 }
650
651 static void release_request(struct transfer_request *request)
652 {
653 struct transfer_request *entry = request_queue_head;
654
655 if (request == request_queue_head) {
656 request_queue_head = request->next;
657 } else {
658 while (entry->next != NULL && entry->next != request)
659 entry = entry->next;
660 if (entry->next == request)
661 entry->next = entry->next->next;
662 }
663
664 if (request->local_fileno != -1)
665 close(request->local_fileno);
666 if (request->local_stream)
667 fclose(request->local_stream);
668 if (request->url != NULL)
669 free(request->url);
670 free(request);
671 }
672
673 static void finish_request(struct transfer_request *request)
674 {
675 struct stat st;
676 struct packed_git *target;
677 struct packed_git **lst;
678
679 request->curl_result = request->slot->curl_result;
680 request->http_code = request->slot->http_code;
681 request->slot = NULL;
682
683 /* Keep locks active */
684 check_locks();
685
686 if (request->headers != NULL)
687 curl_slist_free_all(request->headers);
688
689 /* URL is reused for MOVE after PUT */
690 if (request->state != RUN_PUT) {
691 free(request->url);
692 request->url = NULL;
693 }
694
695 if (request->state == RUN_MKCOL) {
696 if (request->curl_result == CURLE_OK ||
697 request->http_code == 405) {
698 remote_dir_exists[request->obj->sha1[0]] = 1;
699 start_put(request);
700 } else {
701 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
702 sha1_to_hex(request->obj->sha1),
703 request->curl_result, request->http_code);
704 request->state = ABORTED;
705 aborted = 1;
706 }
707 } else if (request->state == RUN_PUT) {
708 if (request->curl_result == CURLE_OK) {
709 start_move(request);
710 } else {
711 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
712 sha1_to_hex(request->obj->sha1),
713 request->curl_result, request->http_code);
714 request->state = ABORTED;
715 aborted = 1;
716 }
717 } else if (request->state == RUN_MOVE) {
718 if (request->curl_result == CURLE_OK) {
719 if (push_verbosely)
720 fprintf(stderr, " sent %s\n",
721 sha1_to_hex(request->obj->sha1));
722 request->obj->flags |= REMOTE;
723 release_request(request);
724 } else {
725 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
726 sha1_to_hex(request->obj->sha1),
727 request->curl_result, request->http_code);
728 request->state = ABORTED;
729 aborted = 1;
730 }
731 } else if (request->state == RUN_FETCH_LOOSE) {
732 fchmod(request->local_fileno, 0444);
733 close(request->local_fileno); request->local_fileno = -1;
734
735 if (request->curl_result != CURLE_OK &&
736 request->http_code != 416) {
737 if (stat(request->tmpfile, &st) == 0) {
738 if (st.st_size == 0)
739 unlink(request->tmpfile);
740 }
741 } else {
742 if (request->http_code == 416)
743 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
744
745 inflateEnd(&request->stream);
746 SHA1_Final(request->real_sha1, &request->c);
747 if (request->zret != Z_STREAM_END) {
748 unlink(request->tmpfile);
749 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
750 unlink(request->tmpfile);
751 } else {
752 request->rename =
753 move_temp_to_file(
754 request->tmpfile,
755 request->filename);
756 if (request->rename == 0) {
757 request->obj->flags |= (LOCAL | REMOTE);
758 }
759 }
760 }
761
762 /* Try fetching packed if necessary */
763 if (request->obj->flags & LOCAL)
764 release_request(request);
765 else
766 start_fetch_packed(request);
767
768 } else if (request->state == RUN_FETCH_PACKED) {
769 if (request->curl_result != CURLE_OK) {
770 fprintf(stderr, "Unable to get pack file %s\n%s",
771 request->url, curl_errorstr);
772 remote->can_update_info_refs = 0;
773 } else {
774 off_t pack_size = ftell(request->local_stream);
775
776 fclose(request->local_stream);
777 request->local_stream = NULL;
778 if (!move_temp_to_file(request->tmpfile,
779 request->filename)) {
780 target = (struct packed_git *)request->userData;
781 target->pack_size = pack_size;
782 lst = &remote->packs;
783 while (*lst != target)
784 lst = &((*lst)->next);
785 *lst = (*lst)->next;
786
787 if (!verify_pack(target, 0))
788 install_packed_git(target);
789 else
790 remote->can_update_info_refs = 0;
791 }
792 }
793 release_request(request);
794 }
795 }
796
797 #ifdef USE_CURL_MULTI
798 void fill_active_slots(void)
799 {
800 struct transfer_request *request = request_queue_head;
801 struct transfer_request *next;
802 struct active_request_slot *slot = active_queue_head;
803 int num_transfers;
804
805 if (aborted)
806 return;
807
808 while (active_requests < max_requests && request != NULL) {
809 next = request->next;
810 if (request->state == NEED_FETCH) {
811 start_fetch_loose(request);
812 } else if (pushing && request->state == NEED_PUSH) {
813 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
814 start_put(request);
815 } else {
816 start_mkcol(request);
817 }
818 curl_multi_perform(curlm, &num_transfers);
819 }
820 request = next;
821 }
822
823 while (slot != NULL) {
824 if (!slot->in_use && slot->curl != NULL) {
825 curl_easy_cleanup(slot->curl);
826 slot->curl = NULL;
827 }
828 slot = slot->next;
829 }
830 }
831 #endif
832
833 static void get_remote_object_list(unsigned char parent);
834
835 static void add_fetch_request(struct object *obj)
836 {
837 struct transfer_request *request;
838
839 check_locks();
840
841 /*
842 * Don't fetch the object if it's known to exist locally
843 * or is already in the request queue
844 */
845 if (remote_dir_exists[obj->sha1[0]] == -1)
846 get_remote_object_list(obj->sha1[0]);
847 if (obj->flags & (LOCAL | FETCHING))
848 return;
849
850 obj->flags |= FETCHING;
851 request = xmalloc(sizeof(*request));
852 request->obj = obj;
853 request->url = NULL;
854 request->lock = NULL;
855 request->headers = NULL;
856 request->local_fileno = -1;
857 request->local_stream = NULL;
858 request->state = NEED_FETCH;
859 request->next = request_queue_head;
860 request_queue_head = request;
861
862 #ifdef USE_CURL_MULTI
863 fill_active_slots();
864 step_active_slots();
865 #endif
866 }
867
868 static int add_send_request(struct object *obj, struct remote_lock *lock)
869 {
870 struct transfer_request *request = request_queue_head;
871 struct packed_git *target;
872
873 /* Keep locks active */
874 check_locks();
875
876 /*
877 * Don't push the object if it's known to exist on the remote
878 * or is already in the request queue
879 */
880 if (remote_dir_exists[obj->sha1[0]] == -1)
881 get_remote_object_list(obj->sha1[0]);
882 if (obj->flags & (REMOTE | PUSHING))
883 return 0;
884 target = find_sha1_pack(obj->sha1, remote->packs);
885 if (target) {
886 obj->flags |= REMOTE;
887 return 0;
888 }
889
890 obj->flags |= PUSHING;
891 request = xmalloc(sizeof(*request));
892 request->obj = obj;
893 request->url = NULL;
894 request->lock = lock;
895 request->headers = NULL;
896 request->local_fileno = -1;
897 request->local_stream = NULL;
898 request->state = NEED_PUSH;
899 request->next = request_queue_head;
900 request_queue_head = request;
901
902 #ifdef USE_CURL_MULTI
903 fill_active_slots();
904 step_active_slots();
905 #endif
906
907 return 1;
908 }
909
910 static int fetch_index(unsigned char *sha1)
911 {
912 char *hex = sha1_to_hex(sha1);
913 char *filename;
914 char *url;
915 char tmpfile[PATH_MAX];
916 long prev_posn = 0;
917 char range[RANGE_HEADER_SIZE];
918 struct curl_slist *range_header = NULL;
919
920 FILE *indexfile;
921 struct active_request_slot *slot;
922 struct slot_results results;
923
924 /* Don't use the index if the pack isn't there */
925 url = xmalloc(strlen(remote->url) + 64);
926 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
927 slot = get_active_slot();
928 slot->results = &results;
929 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
930 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
931 if (start_active_slot(slot)) {
932 run_active_slot(slot);
933 if (results.curl_result != CURLE_OK) {
934 free(url);
935 return error("Unable to verify pack %s is available",
936 hex);
937 }
938 } else {
939 return error("Unable to start request");
940 }
941
942 if (has_pack_index(sha1))
943 return 0;
944
945 if (push_verbosely)
946 fprintf(stderr, "Getting index for pack %s\n", hex);
947
948 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
949
950 filename = sha1_pack_index_name(sha1);
951 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
952 indexfile = fopen(tmpfile, "a");
953 if (!indexfile)
954 return error("Unable to open local file %s for pack index",
955 filename);
956
957 slot = get_active_slot();
958 slot->results = &results;
959 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
960 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
961 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
962 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
963 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
964 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
965 slot->local = indexfile;
966
967 /* If there is data present from a previous transfer attempt,
968 resume where it left off */
969 prev_posn = ftell(indexfile);
970 if (prev_posn>0) {
971 if (push_verbosely)
972 fprintf(stderr,
973 "Resuming fetch of index for pack %s at byte %ld\n",
974 hex, prev_posn);
975 sprintf(range, "Range: bytes=%ld-", prev_posn);
976 range_header = curl_slist_append(range_header, range);
977 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
978 }
979
980 if (start_active_slot(slot)) {
981 run_active_slot(slot);
982 if (results.curl_result != CURLE_OK) {
983 free(url);
984 fclose(indexfile);
985 return error("Unable to get pack index %s\n%s", url,
986 curl_errorstr);
987 }
988 } else {
989 free(url);
990 fclose(indexfile);
991 return error("Unable to start request");
992 }
993
994 free(url);
995 fclose(indexfile);
996
997 return move_temp_to_file(tmpfile, filename);
998 }
999
1000 static int setup_index(unsigned char *sha1)
1001 {
1002 struct packed_git *new_pack;
1003
1004 if (fetch_index(sha1))
1005 return -1;
1006
1007 new_pack = parse_pack_index(sha1);
1008 new_pack->next = remote->packs;
1009 remote->packs = new_pack;
1010 return 0;
1011 }
1012
1013 static int fetch_indices(void)
1014 {
1015 unsigned char sha1[20];
1016 char *url;
1017 struct buffer buffer;
1018 char *data;
1019 int i = 0;
1020
1021 struct active_request_slot *slot;
1022 struct slot_results results;
1023
1024 data = xcalloc(1, 4096);
1025 buffer.size = 4096;
1026 buffer.posn = 0;
1027 buffer.buffer = data;
1028
1029 if (push_verbosely)
1030 fprintf(stderr, "Getting pack list\n");
1031
1032 url = xmalloc(strlen(remote->url) + 20);
1033 sprintf(url, "%sobjects/info/packs", remote->url);
1034
1035 slot = get_active_slot();
1036 slot->results = &results;
1037 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1038 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1039 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1040 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1041 if (start_active_slot(slot)) {
1042 run_active_slot(slot);
1043 if (results.curl_result != CURLE_OK) {
1044 free(buffer.buffer);
1045 free(url);
1046 if (results.http_code == 404)
1047 return 0;
1048 else
1049 return error("%s", curl_errorstr);
1050 }
1051 } else {
1052 free(buffer.buffer);
1053 free(url);
1054 return error("Unable to start request");
1055 }
1056 free(url);
1057
1058 data = buffer.buffer;
1059 while (i < buffer.posn) {
1060 switch (data[i]) {
1061 case 'P':
1062 i++;
1063 if (i + 52 < buffer.posn &&
1064 !prefixcmp(data + i, " pack-") &&
1065 !prefixcmp(data + i + 46, ".pack\n")) {
1066 get_sha1_hex(data + i + 6, sha1);
1067 setup_index(sha1);
1068 i += 51;
1069 break;
1070 }
1071 default:
1072 while (data[i] != '\n')
1073 i++;
1074 }
1075 i++;
1076 }
1077
1078 free(buffer.buffer);
1079 return 0;
1080 }
1081
1082 static inline int needs_quote(int ch)
1083 {
1084 if (((ch >= 'A') && (ch <= 'Z'))
1085 || ((ch >= 'a') && (ch <= 'z'))
1086 || ((ch >= '0') && (ch <= '9'))
1087 || (ch == '/')
1088 || (ch == '-')
1089 || (ch == '.'))
1090 return 0;
1091 return 1;
1092 }
1093
1094 static inline int hex(int v)
1095 {
1096 if (v < 10) return '0' + v;
1097 else return 'A' + v - 10;
1098 }
1099
1100 static char *quote_ref_url(const char *base, const char *ref)
1101 {
1102 const char *cp;
1103 char *dp, *qref;
1104 int len, baselen, ch;
1105
1106 baselen = strlen(base);
1107 len = baselen + 1;
1108 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1109 if (needs_quote(ch))
1110 len += 2; /* extra two hex plus replacement % */
1111 qref = xmalloc(len);
1112 memcpy(qref, base, baselen);
1113 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1114 if (needs_quote(ch)) {
1115 *dp++ = '%';
1116 *dp++ = hex((ch >> 4) & 0xF);
1117 *dp++ = hex(ch & 0xF);
1118 }
1119 else
1120 *dp++ = ch;
1121 }
1122 *dp = 0;
1123
1124 return qref;
1125 }
1126
1127 int fetch_ref(char *ref, unsigned char *sha1)
1128 {
1129 char *url;
1130 char hex[42];
1131 struct buffer buffer;
1132 char *base = remote->url;
1133 struct active_request_slot *slot;
1134 struct slot_results results;
1135 buffer.size = 41;
1136 buffer.posn = 0;
1137 buffer.buffer = hex;
1138 hex[41] = '\0';
1139
1140 url = quote_ref_url(base, ref);
1141 slot = get_active_slot();
1142 slot->results = &results;
1143 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1144 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1145 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1146 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1147 if (start_active_slot(slot)) {
1148 run_active_slot(slot);
1149 if (results.curl_result != CURLE_OK)
1150 return error("Couldn't get %s for %s\n%s",
1151 url, ref, curl_errorstr);
1152 } else {
1153 return error("Unable to start request");
1154 }
1155
1156 hex[40] = '\0';
1157 get_sha1_hex(hex, sha1);
1158 return 0;
1159 }
1160
1161 static void one_remote_object(const char *hex)
1162 {
1163 unsigned char sha1[20];
1164 struct object *obj;
1165
1166 if (get_sha1_hex(hex, sha1) != 0)
1167 return;
1168
1169 obj = lookup_object(sha1);
1170 if (!obj)
1171 obj = parse_object(sha1);
1172
1173 /* Ignore remote objects that don't exist locally */
1174 if (!obj)
1175 return;
1176
1177 obj->flags |= REMOTE;
1178 if (!object_list_contains(objects, obj))
1179 object_list_insert(obj, &objects);
1180 }
1181
1182 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1183 {
1184 int *lock_flags = (int *)ctx->userData;
1185
1186 if (tag_closed) {
1187 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1188 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1189 (*lock_flags & DAV_PROP_LOCKWR)) {
1190 *lock_flags |= DAV_LOCK_OK;
1191 }
1192 *lock_flags &= DAV_LOCK_OK;
1193 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1194 *lock_flags |= DAV_PROP_LOCKWR;
1195 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1196 *lock_flags |= DAV_PROP_LOCKEX;
1197 }
1198 }
1199 }
1200
1201 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1202 {
1203 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1204
1205 if (tag_closed && ctx->cdata) {
1206 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1207 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1208 strcpy(lock->owner, ctx->cdata);
1209 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1210 if (!prefixcmp(ctx->cdata, "Second-"))
1211 lock->timeout =
1212 strtol(ctx->cdata + 7, NULL, 10);
1213 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1214 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1215 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1216 strcpy(lock->token, ctx->cdata + 16);
1217 }
1218 }
1219 }
1220 }
1221
1222 static void one_remote_ref(char *refname);
1223
1224 static void
1225 xml_start_tag(void *userData, const char *name, const char **atts)
1226 {
1227 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1228 const char *c = strchr(name, ':');
1229 int new_len;
1230
1231 if (c == NULL)
1232 c = name;
1233 else
1234 c++;
1235
1236 new_len = strlen(ctx->name) + strlen(c) + 2;
1237
1238 if (new_len > ctx->len) {
1239 ctx->name = xrealloc(ctx->name, new_len);
1240 ctx->len = new_len;
1241 }
1242 strcat(ctx->name, ".");
1243 strcat(ctx->name, c);
1244
1245 free(ctx->cdata);
1246 ctx->cdata = NULL;
1247
1248 ctx->userFunc(ctx, 0);
1249 }
1250
1251 static void
1252 xml_end_tag(void *userData, const char *name)
1253 {
1254 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1255 const char *c = strchr(name, ':');
1256 char *ep;
1257
1258 ctx->userFunc(ctx, 1);
1259
1260 if (c == NULL)
1261 c = name;
1262 else
1263 c++;
1264
1265 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1266 *ep = 0;
1267 }
1268
1269 static void
1270 xml_cdata(void *userData, const XML_Char *s, int len)
1271 {
1272 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1273 free(ctx->cdata);
1274 ctx->cdata = xmalloc(len + 1);
1275 /* NB: 's' is not null-terminated, can not use strlcpy here */
1276 memcpy(ctx->cdata, s, len);
1277 ctx->cdata[len] = '\0';
1278 }
1279
1280 static struct remote_lock *lock_remote(const char *path, long timeout)
1281 {
1282 struct active_request_slot *slot;
1283 struct slot_results results;
1284 struct buffer out_buffer;
1285 struct buffer in_buffer;
1286 char *out_data;
1287 char *in_data;
1288 char *url;
1289 char *ep;
1290 char timeout_header[25];
1291 struct remote_lock *lock = NULL;
1292 XML_Parser parser = XML_ParserCreate(NULL);
1293 enum XML_Status result;
1294 struct curl_slist *dav_headers = NULL;
1295 struct xml_ctx ctx;
1296
1297 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1298 sprintf(url, "%s%s", remote->url, path);
1299
1300 /* Make sure leading directories exist for the remote ref */
1301 ep = strchr(url + strlen(remote->url) + 1, '/');
1302 while (ep) {
1303 *ep = 0;
1304 slot = get_active_slot();
1305 slot->results = &results;
1306 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1307 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1308 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1309 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1310 if (start_active_slot(slot)) {
1311 run_active_slot(slot);
1312 if (results.curl_result != CURLE_OK &&
1313 results.http_code != 405) {
1314 fprintf(stderr,
1315 "Unable to create branch path %s\n",
1316 url);
1317 free(url);
1318 return NULL;
1319 }
1320 } else {
1321 fprintf(stderr, "Unable to start MKCOL request\n");
1322 free(url);
1323 return NULL;
1324 }
1325 *ep = '/';
1326 ep = strchr(ep + 1, '/');
1327 }
1328
1329 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1330 out_data = xmalloc(out_buffer.size + 1);
1331 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1332 out_buffer.posn = 0;
1333 out_buffer.buffer = out_data;
1334
1335 in_buffer.size = 4096;
1336 in_data = xmalloc(in_buffer.size);
1337 in_buffer.posn = 0;
1338 in_buffer.buffer = in_data;
1339
1340 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1341 dav_headers = curl_slist_append(dav_headers, timeout_header);
1342 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1343
1344 slot = get_active_slot();
1345 slot->results = &results;
1346 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1347 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1348 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1349 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1350 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1351 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1352 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1353 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1354 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1355
1356 lock = xcalloc(1, sizeof(*lock));
1357 lock->timeout = -1;
1358
1359 if (start_active_slot(slot)) {
1360 run_active_slot(slot);
1361 if (results.curl_result == CURLE_OK) {
1362 ctx.name = xcalloc(10, 1);
1363 ctx.len = 0;
1364 ctx.cdata = NULL;
1365 ctx.userFunc = handle_new_lock_ctx;
1366 ctx.userData = lock;
1367 XML_SetUserData(parser, &ctx);
1368 XML_SetElementHandler(parser, xml_start_tag,
1369 xml_end_tag);
1370 XML_SetCharacterDataHandler(parser, xml_cdata);
1371 result = XML_Parse(parser, in_buffer.buffer,
1372 in_buffer.posn, 1);
1373 free(ctx.name);
1374 if (result != XML_STATUS_OK) {
1375 fprintf(stderr, "XML error: %s\n",
1376 XML_ErrorString(
1377 XML_GetErrorCode(parser)));
1378 lock->timeout = -1;
1379 }
1380 }
1381 } else {
1382 fprintf(stderr, "Unable to start LOCK request\n");
1383 }
1384
1385 curl_slist_free_all(dav_headers);
1386 free(out_data);
1387 free(in_data);
1388
1389 if (lock->token == NULL || lock->timeout <= 0) {
1390 if (lock->token != NULL)
1391 free(lock->token);
1392 if (lock->owner != NULL)
1393 free(lock->owner);
1394 free(url);
1395 free(lock);
1396 lock = NULL;
1397 } else {
1398 lock->url = url;
1399 lock->start_time = time(NULL);
1400 lock->next = remote->locks;
1401 remote->locks = lock;
1402 }
1403
1404 return lock;
1405 }
1406
1407 static int unlock_remote(struct remote_lock *lock)
1408 {
1409 struct active_request_slot *slot;
1410 struct slot_results results;
1411 struct remote_lock *prev = remote->locks;
1412 char *lock_token_header;
1413 struct curl_slist *dav_headers = NULL;
1414 int rc = 0;
1415
1416 lock_token_header = xmalloc(strlen(lock->token) + 31);
1417 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1418 lock->token);
1419 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1420
1421 slot = get_active_slot();
1422 slot->results = &results;
1423 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1424 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1425 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1426 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1427
1428 if (start_active_slot(slot)) {
1429 run_active_slot(slot);
1430 if (results.curl_result == CURLE_OK)
1431 rc = 1;
1432 else
1433 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1434 results.http_code);
1435 } else {
1436 fprintf(stderr, "Unable to start UNLOCK request\n");
1437 }
1438
1439 curl_slist_free_all(dav_headers);
1440 free(lock_token_header);
1441
1442 if (remote->locks == lock) {
1443 remote->locks = lock->next;
1444 } else {
1445 while (prev && prev->next != lock)
1446 prev = prev->next;
1447 if (prev)
1448 prev->next = prev->next->next;
1449 }
1450
1451 if (lock->owner != NULL)
1452 free(lock->owner);
1453 free(lock->url);
1454 free(lock->token);
1455 free(lock);
1456
1457 return rc;
1458 }
1459
1460 static void remote_ls(const char *path, int flags,
1461 void (*userFunc)(struct remote_ls_ctx *ls),
1462 void *userData);
1463
1464 static void process_ls_object(struct remote_ls_ctx *ls)
1465 {
1466 unsigned int *parent = (unsigned int *)ls->userData;
1467 char *path = ls->dentry_name;
1468 char *obj_hex;
1469
1470 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1471 remote_dir_exists[*parent] = 1;
1472 return;
1473 }
1474
1475 if (strlen(path) != 49)
1476 return;
1477 path += 8;
1478 obj_hex = xmalloc(strlen(path));
1479 /* NB: path is not null-terminated, can not use strlcpy here */
1480 memcpy(obj_hex, path, 2);
1481 strcpy(obj_hex + 2, path + 3);
1482 one_remote_object(obj_hex);
1483 free(obj_hex);
1484 }
1485
1486 static void process_ls_ref(struct remote_ls_ctx *ls)
1487 {
1488 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1489 fprintf(stderr, " %s\n", ls->dentry_name);
1490 return;
1491 }
1492
1493 if (!(ls->dentry_flags & IS_DIR))
1494 one_remote_ref(ls->dentry_name);
1495 }
1496
1497 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1498 {
1499 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1500
1501 if (tag_closed) {
1502 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1503 if (ls->dentry_flags & IS_DIR) {
1504 if (ls->flags & PROCESS_DIRS) {
1505 ls->userFunc(ls);
1506 }
1507 if (strcmp(ls->dentry_name, ls->path) &&
1508 ls->flags & RECURSIVE) {
1509 remote_ls(ls->dentry_name,
1510 ls->flags,
1511 ls->userFunc,
1512 ls->userData);
1513 }
1514 } else if (ls->flags & PROCESS_FILES) {
1515 ls->userFunc(ls);
1516 }
1517 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1518 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1519 remote->path_len + 1);
1520 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1521 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1522 ls->dentry_flags |= IS_DIR;
1523 }
1524 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1525 free(ls->dentry_name);
1526 ls->dentry_name = NULL;
1527 ls->dentry_flags = 0;
1528 }
1529 }
1530
1531 static void remote_ls(const char *path, int flags,
1532 void (*userFunc)(struct remote_ls_ctx *ls),
1533 void *userData)
1534 {
1535 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1536 struct active_request_slot *slot;
1537 struct slot_results results;
1538 struct buffer in_buffer;
1539 struct buffer out_buffer;
1540 char *in_data;
1541 char *out_data;
1542 XML_Parser parser = XML_ParserCreate(NULL);
1543 enum XML_Status result;
1544 struct curl_slist *dav_headers = NULL;
1545 struct xml_ctx ctx;
1546 struct remote_ls_ctx ls;
1547
1548 ls.flags = flags;
1549 ls.path = xstrdup(path);
1550 ls.dentry_name = NULL;
1551 ls.dentry_flags = 0;
1552 ls.userData = userData;
1553 ls.userFunc = userFunc;
1554
1555 sprintf(url, "%s%s", remote->url, path);
1556
1557 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1558 out_data = xmalloc(out_buffer.size + 1);
1559 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1560 out_buffer.posn = 0;
1561 out_buffer.buffer = out_data;
1562
1563 in_buffer.size = 4096;
1564 in_data = xmalloc(in_buffer.size);
1565 in_buffer.posn = 0;
1566 in_buffer.buffer = in_data;
1567
1568 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1569 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1570
1571 slot = get_active_slot();
1572 slot->results = &results;
1573 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1574 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1575 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1576 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1577 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1578 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1579 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1580 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1581 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1582
1583 if (start_active_slot(slot)) {
1584 run_active_slot(slot);
1585 if (results.curl_result == CURLE_OK) {
1586 ctx.name = xcalloc(10, 1);
1587 ctx.len = 0;
1588 ctx.cdata = NULL;
1589 ctx.userFunc = handle_remote_ls_ctx;
1590 ctx.userData = &ls;
1591 XML_SetUserData(parser, &ctx);
1592 XML_SetElementHandler(parser, xml_start_tag,
1593 xml_end_tag);
1594 XML_SetCharacterDataHandler(parser, xml_cdata);
1595 result = XML_Parse(parser, in_buffer.buffer,
1596 in_buffer.posn, 1);
1597 free(ctx.name);
1598
1599 if (result != XML_STATUS_OK) {
1600 fprintf(stderr, "XML error: %s\n",
1601 XML_ErrorString(
1602 XML_GetErrorCode(parser)));
1603 }
1604 }
1605 } else {
1606 fprintf(stderr, "Unable to start PROPFIND request\n");
1607 }
1608
1609 free(ls.path);
1610 free(url);
1611 free(out_data);
1612 free(in_buffer.buffer);
1613 curl_slist_free_all(dav_headers);
1614 }
1615
1616 static void get_remote_object_list(unsigned char parent)
1617 {
1618 char path[] = "objects/XX/";
1619 static const char hex[] = "0123456789abcdef";
1620 unsigned int val = parent;
1621
1622 path[8] = hex[val >> 4];
1623 path[9] = hex[val & 0xf];
1624 remote_dir_exists[val] = 0;
1625 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1626 process_ls_object, &val);
1627 }
1628
1629 static int locking_available(void)
1630 {
1631 struct active_request_slot *slot;
1632 struct slot_results results;
1633 struct buffer in_buffer;
1634 struct buffer out_buffer;
1635 char *in_data;
1636 char *out_data;
1637 XML_Parser parser = XML_ParserCreate(NULL);
1638 enum XML_Status result;
1639 struct curl_slist *dav_headers = NULL;
1640 struct xml_ctx ctx;
1641 int lock_flags = 0;
1642
1643 out_buffer.size =
1644 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1645 strlen(remote->url) - 2;
1646 out_data = xmalloc(out_buffer.size + 1);
1647 snprintf(out_data, out_buffer.size + 1,
1648 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1649 out_buffer.posn = 0;
1650 out_buffer.buffer = out_data;
1651
1652 in_buffer.size = 4096;
1653 in_data = xmalloc(in_buffer.size);
1654 in_buffer.posn = 0;
1655 in_buffer.buffer = in_data;
1656
1657 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1658 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1659
1660 slot = get_active_slot();
1661 slot->results = &results;
1662 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1663 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1664 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1665 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1666 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1667 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1668 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1669 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1670 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1671
1672 if (start_active_slot(slot)) {
1673 run_active_slot(slot);
1674 if (results.curl_result == CURLE_OK) {
1675 ctx.name = xcalloc(10, 1);
1676 ctx.len = 0;
1677 ctx.cdata = NULL;
1678 ctx.userFunc = handle_lockprop_ctx;
1679 ctx.userData = &lock_flags;
1680 XML_SetUserData(parser, &ctx);
1681 XML_SetElementHandler(parser, xml_start_tag,
1682 xml_end_tag);
1683 result = XML_Parse(parser, in_buffer.buffer,
1684 in_buffer.posn, 1);
1685 free(ctx.name);
1686
1687 if (result != XML_STATUS_OK) {
1688 fprintf(stderr, "XML error: %s\n",
1689 XML_ErrorString(
1690 XML_GetErrorCode(parser)));
1691 lock_flags = 0;
1692 }
1693 }
1694 } else {
1695 fprintf(stderr, "Unable to start PROPFIND request\n");
1696 }
1697
1698 free(out_data);
1699 free(in_buffer.buffer);
1700 curl_slist_free_all(dav_headers);
1701
1702 return lock_flags;
1703 }
1704
1705 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1706 {
1707 struct object_list *entry = xmalloc(sizeof(struct object_list));
1708 entry->item = obj;
1709 entry->next = *p;
1710 *p = entry;
1711 return &entry->next;
1712 }
1713
1714 static struct object_list **process_blob(struct blob *blob,
1715 struct object_list **p,
1716 struct name_path *path,
1717 const char *name)
1718 {
1719 struct object *obj = &blob->object;
1720
1721 obj->flags |= LOCAL;
1722
1723 if (obj->flags & (UNINTERESTING | SEEN))
1724 return p;
1725
1726 obj->flags |= SEEN;
1727 return add_one_object(obj, p);
1728 }
1729
1730 static struct object_list **process_tree(struct tree *tree,
1731 struct object_list **p,
1732 struct name_path *path,
1733 const char *name)
1734 {
1735 struct object *obj = &tree->object;
1736 struct tree_desc desc;
1737 struct name_entry entry;
1738 struct name_path me;
1739
1740 obj->flags |= LOCAL;
1741
1742 if (obj->flags & (UNINTERESTING | SEEN))
1743 return p;
1744 if (parse_tree(tree) < 0)
1745 die("bad tree object %s", sha1_to_hex(obj->sha1));
1746
1747 obj->flags |= SEEN;
1748 name = xstrdup(name);
1749 p = add_one_object(obj, p);
1750 me.up = path;
1751 me.elem = name;
1752 me.elem_len = strlen(name);
1753
1754 init_tree_desc(&desc, tree->buffer, tree->size);
1755
1756 while (tree_entry(&desc, &entry)) {
1757 if (S_ISDIR(entry.mode))
1758 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1759 else
1760 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1761 }
1762 free(tree->buffer);
1763 tree->buffer = NULL;
1764 return p;
1765 }
1766
1767 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1768 {
1769 int i;
1770 struct commit *commit;
1771 struct object_list **p = &objects;
1772 int count = 0;
1773
1774 while ((commit = get_revision(revs)) != NULL) {
1775 p = process_tree(commit->tree, p, NULL, "");
1776 commit->object.flags |= LOCAL;
1777 if (!(commit->object.flags & UNINTERESTING))
1778 count += add_send_request(&commit->object, lock);
1779 }
1780
1781 for (i = 0; i < revs->pending.nr; i++) {
1782 struct object_array_entry *entry = revs->pending.objects + i;
1783 struct object *obj = entry->item;
1784 const char *name = entry->name;
1785
1786 if (obj->flags & (UNINTERESTING | SEEN))
1787 continue;
1788 if (obj->type == OBJ_TAG) {
1789 obj->flags |= SEEN;
1790 p = add_one_object(obj, p);
1791 continue;
1792 }
1793 if (obj->type == OBJ_TREE) {
1794 p = process_tree((struct tree *)obj, p, NULL, name);
1795 continue;
1796 }
1797 if (obj->type == OBJ_BLOB) {
1798 p = process_blob((struct blob *)obj, p, NULL, name);
1799 continue;
1800 }
1801 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1802 }
1803
1804 while (objects) {
1805 if (!(objects->item->flags & UNINTERESTING))
1806 count += add_send_request(objects->item, lock);
1807 objects = objects->next;
1808 }
1809
1810 return count;
1811 }
1812
1813 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1814 {
1815 struct active_request_slot *slot;
1816 struct slot_results results;
1817 char *out_data;
1818 char *if_header;
1819 struct buffer out_buffer;
1820 struct curl_slist *dav_headers = NULL;
1821 int i;
1822
1823 if_header = xmalloc(strlen(lock->token) + 25);
1824 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1825 dav_headers = curl_slist_append(dav_headers, if_header);
1826
1827 out_buffer.size = 41;
1828 out_data = xmalloc(out_buffer.size + 1);
1829 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1830 if (i != out_buffer.size) {
1831 fprintf(stderr, "Unable to initialize PUT request body\n");
1832 return 0;
1833 }
1834 out_buffer.posn = 0;
1835 out_buffer.buffer = out_data;
1836
1837 slot = get_active_slot();
1838 slot->results = &results;
1839 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1840 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1841 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1842 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1843 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1844 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1845 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1846 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1847 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1848
1849 if (start_active_slot(slot)) {
1850 run_active_slot(slot);
1851 free(out_data);
1852 free(if_header);
1853 if (results.curl_result != CURLE_OK) {
1854 fprintf(stderr,
1855 "PUT error: curl result=%d, HTTP code=%ld\n",
1856 results.curl_result, results.http_code);
1857 /* We should attempt recovery? */
1858 return 0;
1859 }
1860 } else {
1861 free(out_data);
1862 free(if_header);
1863 fprintf(stderr, "Unable to start PUT request\n");
1864 return 0;
1865 }
1866
1867 return 1;
1868 }
1869
1870 static struct ref *local_refs, **local_tail;
1871 static struct ref *remote_refs, **remote_tail;
1872
1873 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1874 {
1875 struct ref *ref;
1876 int len = strlen(refname) + 1;
1877 ref = xcalloc(1, sizeof(*ref) + len);
1878 hashcpy(ref->new_sha1, sha1);
1879 memcpy(ref->name, refname, len);
1880 *local_tail = ref;
1881 local_tail = &ref->next;
1882 return 0;
1883 }
1884
1885 static void one_remote_ref(char *refname)
1886 {
1887 struct ref *ref;
1888 unsigned char remote_sha1[20];
1889 struct object *obj;
1890 int len = strlen(refname) + 1;
1891
1892 if (fetch_ref(refname, remote_sha1) != 0) {
1893 fprintf(stderr,
1894 "Unable to fetch ref %s from %s\n",
1895 refname, remote->url);
1896 return;
1897 }
1898
1899 /*
1900 * Fetch a copy of the object if it doesn't exist locally - it
1901 * may be required for updating server info later.
1902 */
1903 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1904 obj = lookup_unknown_object(remote_sha1);
1905 if (obj) {
1906 fprintf(stderr, " fetch %s for %s\n",
1907 sha1_to_hex(remote_sha1), refname);
1908 add_fetch_request(obj);
1909 }
1910 }
1911
1912 ref = xcalloc(1, sizeof(*ref) + len);
1913 hashcpy(ref->old_sha1, remote_sha1);
1914 memcpy(ref->name, refname, len);
1915 *remote_tail = ref;
1916 remote_tail = &ref->next;
1917 }
1918
1919 static void get_local_heads(void)
1920 {
1921 local_tail = &local_refs;
1922 for_each_ref(one_local_ref, NULL);
1923 }
1924
1925 static void get_dav_remote_heads(void)
1926 {
1927 remote_tail = &remote_refs;
1928 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1929 }
1930
1931 static int is_zero_sha1(const unsigned char *sha1)
1932 {
1933 int i;
1934
1935 for (i = 0; i < 20; i++) {
1936 if (*sha1++)
1937 return 0;
1938 }
1939 return 1;
1940 }
1941
1942 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1943 {
1944 while (list) {
1945 struct commit_list *temp = list;
1946 temp->item->object.flags &= ~mark;
1947 list = temp->next;
1948 free(temp);
1949 }
1950 }
1951
1952 static int ref_newer(const unsigned char *new_sha1,
1953 const unsigned char *old_sha1)
1954 {
1955 struct object *o;
1956 struct commit *old, *new;
1957 struct commit_list *list, *used;
1958 int found = 0;
1959
1960 /* Both new and old must be commit-ish and new is descendant of
1961 * old. Otherwise we require --force.
1962 */
1963 o = deref_tag(parse_object(old_sha1), NULL, 0);
1964 if (!o || o->type != OBJ_COMMIT)
1965 return 0;
1966 old = (struct commit *) o;
1967
1968 o = deref_tag(parse_object(new_sha1), NULL, 0);
1969 if (!o || o->type != OBJ_COMMIT)
1970 return 0;
1971 new = (struct commit *) o;
1972
1973 if (parse_commit(new) < 0)
1974 return 0;
1975
1976 used = list = NULL;
1977 commit_list_insert(new, &list);
1978 while (list) {
1979 new = pop_most_recent_commit(&list, TMP_MARK);
1980 commit_list_insert(new, &used);
1981 if (new == old) {
1982 found = 1;
1983 break;
1984 }
1985 }
1986 unmark_and_free(list, TMP_MARK);
1987 unmark_and_free(used, TMP_MARK);
1988 return found;
1989 }
1990
1991 static void mark_edge_parents_uninteresting(struct commit *commit)
1992 {
1993 struct commit_list *parents;
1994
1995 for (parents = commit->parents; parents; parents = parents->next) {
1996 struct commit *parent = parents->item;
1997 if (!(parent->object.flags & UNINTERESTING))
1998 continue;
1999 mark_tree_uninteresting(parent->tree);
2000 }
2001 }
2002
2003 static void mark_edges_uninteresting(struct commit_list *list)
2004 {
2005 for ( ; list; list = list->next) {
2006 struct commit *commit = list->item;
2007
2008 if (commit->object.flags & UNINTERESTING) {
2009 mark_tree_uninteresting(commit->tree);
2010 continue;
2011 }
2012 mark_edge_parents_uninteresting(commit);
2013 }
2014 }
2015
2016 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2017 {
2018 struct buffer *buf = (struct buffer *)ls->userData;
2019 unsigned char remote_sha1[20];
2020 struct object *o;
2021 int len;
2022 char *ref_info;
2023
2024 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2025 fprintf(stderr,
2026 "Unable to fetch ref %s from %s\n",
2027 ls->dentry_name, remote->url);
2028 aborted = 1;
2029 return;
2030 }
2031
2032 o = parse_object(remote_sha1);
2033 if (!o) {
2034 fprintf(stderr,
2035 "Unable to parse object %s for remote ref %s\n",
2036 sha1_to_hex(remote_sha1), ls->dentry_name);
2037 aborted = 1;
2038 return;
2039 }
2040
2041 len = strlen(ls->dentry_name) + 42;
2042 ref_info = xcalloc(len + 1, 1);
2043 sprintf(ref_info, "%s %s\n",
2044 sha1_to_hex(remote_sha1), ls->dentry_name);
2045 fwrite_buffer(ref_info, 1, len, buf);
2046 free(ref_info);
2047
2048 if (o->type == OBJ_TAG) {
2049 o = deref_tag(o, ls->dentry_name, 0);
2050 if (o) {
2051 len = strlen(ls->dentry_name) + 45;
2052 ref_info = xcalloc(len + 1, 1);
2053 sprintf(ref_info, "%s %s^{}\n",
2054 sha1_to_hex(o->sha1), ls->dentry_name);
2055 fwrite_buffer(ref_info, 1, len, buf);
2056 free(ref_info);
2057 }
2058 }
2059 }
2060
2061 static void update_remote_info_refs(struct remote_lock *lock)
2062 {
2063 struct buffer buffer;
2064 struct active_request_slot *slot;
2065 struct slot_results results;
2066 char *if_header;
2067 struct curl_slist *dav_headers = NULL;
2068
2069 buffer.buffer = xcalloc(1, 4096);
2070 buffer.size = 4096;
2071 buffer.posn = 0;
2072 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2073 add_remote_info_ref, &buffer);
2074 if (!aborted) {
2075 if_header = xmalloc(strlen(lock->token) + 25);
2076 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2077 dav_headers = curl_slist_append(dav_headers, if_header);
2078
2079 slot = get_active_slot();
2080 slot->results = &results;
2081 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2082 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2083 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2084 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2085 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2086 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2087 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2088 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2089 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2090
2091 buffer.posn = 0;
2092
2093 if (start_active_slot(slot)) {
2094 run_active_slot(slot);
2095 if (results.curl_result != CURLE_OK) {
2096 fprintf(stderr,
2097 "PUT error: curl result=%d, HTTP code=%ld\n",
2098 results.curl_result, results.http_code);
2099 }
2100 }
2101 free(if_header);
2102 }
2103 free(buffer.buffer);
2104 }
2105
2106 static int remote_exists(const char *path)
2107 {
2108 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2109 struct active_request_slot *slot;
2110 struct slot_results results;
2111
2112 sprintf(url, "%s%s", remote->url, path);
2113
2114 slot = get_active_slot();
2115 slot->results = &results;
2116 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2117 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2118
2119 if (start_active_slot(slot)) {
2120 run_active_slot(slot);
2121 if (results.http_code == 404)
2122 return 0;
2123 else if (results.curl_result == CURLE_OK)
2124 return 1;
2125 else
2126 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2127 } else {
2128 fprintf(stderr, "Unable to start HEAD request\n");
2129 }
2130
2131 return -1;
2132 }
2133
2134 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2135 {
2136 char *url;
2137 struct buffer buffer;
2138 struct active_request_slot *slot;
2139 struct slot_results results;
2140
2141 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2142 sprintf(url, "%s%s", remote->url, path);
2143
2144 buffer.size = 4096;
2145 buffer.posn = 0;
2146 buffer.buffer = xmalloc(buffer.size);
2147
2148 slot = get_active_slot();
2149 slot->results = &results;
2150 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2151 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2152 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2153 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2154 if (start_active_slot(slot)) {
2155 run_active_slot(slot);
2156 if (results.curl_result != CURLE_OK) {
2157 die("Couldn't get %s for remote symref\n%s",
2158 url, curl_errorstr);
2159 }
2160 } else {
2161 die("Unable to start remote symref request");
2162 }
2163 free(url);
2164
2165 if (*symref != NULL)
2166 free(*symref);
2167 *symref = NULL;
2168 hashclr(sha1);
2169
2170 if (buffer.posn == 0)
2171 return;
2172
2173 /* If it's a symref, set the refname; otherwise try for a sha1 */
2174 if (!prefixcmp((char *)buffer.buffer, "ref: ")) {
2175 *symref = xmalloc(buffer.posn - 5);
2176 memcpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 6);
2177 (*symref)[buffer.posn - 6] = '\0';
2178 } else {
2179 get_sha1_hex(buffer.buffer, sha1);
2180 }
2181
2182 free(buffer.buffer);
2183 }
2184
2185 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2186 {
2187 struct commit *head = lookup_commit(head_sha1);
2188 struct commit *branch = lookup_commit(branch_sha1);
2189 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2190
2191 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2192 }
2193
2194 static int delete_remote_branch(char *pattern, int force)
2195 {
2196 struct ref *refs = remote_refs;
2197 struct ref *remote_ref = NULL;
2198 unsigned char head_sha1[20];
2199 char *symref = NULL;
2200 int match;
2201 int patlen = strlen(pattern);
2202 int i;
2203 struct active_request_slot *slot;
2204 struct slot_results results;
2205 char *url;
2206
2207 /* Find the remote branch(es) matching the specified branch name */
2208 for (match = 0; refs; refs = refs->next) {
2209 char *name = refs->name;
2210 int namelen = strlen(name);
2211 if (namelen < patlen ||
2212 memcmp(name + namelen - patlen, pattern, patlen))
2213 continue;
2214 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2215 continue;
2216 match++;
2217 remote_ref = refs;
2218 }
2219 if (match == 0)
2220 return error("No remote branch matches %s", pattern);
2221 if (match != 1)
2222 return error("More than one remote branch matches %s",
2223 pattern);
2224
2225 /*
2226 * Remote HEAD must be a symref (not exactly foolproof; a remote
2227 * symlink to a symref will look like a symref)
2228 */
2229 fetch_symref("HEAD", &symref, head_sha1);
2230 if (!symref)
2231 return error("Remote HEAD is not a symref");
2232
2233 /* Remote branch must not be the remote HEAD */
2234 for (i=0; symref && i<MAXDEPTH; i++) {
2235 if (!strcmp(remote_ref->name, symref))
2236 return error("Remote branch %s is the current HEAD",
2237 remote_ref->name);
2238 fetch_symref(symref, &symref, head_sha1);
2239 }
2240
2241 /* Run extra sanity checks if delete is not forced */
2242 if (!force) {
2243 /* Remote HEAD must resolve to a known object */
2244 if (symref)
2245 return error("Remote HEAD symrefs too deep");
2246 if (is_zero_sha1(head_sha1))
2247 return error("Unable to resolve remote HEAD");
2248 if (!has_sha1_file(head_sha1))
2249 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2250
2251 /* Remote branch must resolve to a known object */
2252 if (is_zero_sha1(remote_ref->old_sha1))
2253 return error("Unable to resolve remote branch %s",
2254 remote_ref->name);
2255 if (!has_sha1_file(remote_ref->old_sha1))
2256 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));
2257
2258 /* Remote branch must be an ancestor of remote HEAD */
2259 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2260 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);
2261 }
2262 }
2263
2264 /* Send delete request */
2265 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2266 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2267 sprintf(url, "%s%s", remote->url, remote_ref->name);
2268 slot = get_active_slot();
2269 slot->results = &results;
2270 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2271 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2272 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2273 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2274 if (start_active_slot(slot)) {
2275 run_active_slot(slot);
2276 free(url);
2277 if (results.curl_result != CURLE_OK)
2278 return error("DELETE request failed (%d/%ld)\n",
2279 results.curl_result, results.http_code);
2280 } else {
2281 free(url);
2282 return error("Unable to start DELETE request");
2283 }
2284
2285 return 0;
2286 }
2287
2288 int main(int argc, char **argv)
2289 {
2290 struct transfer_request *request;
2291 struct transfer_request *next_request;
2292 int nr_refspec = 0;
2293 char **refspec = NULL;
2294 struct remote_lock *ref_lock = NULL;
2295 struct remote_lock *info_ref_lock = NULL;
2296 struct rev_info revs;
2297 int delete_branch = 0;
2298 int force_delete = 0;
2299 int objects_to_send;
2300 int rc = 0;
2301 int i;
2302 int new_refs;
2303 struct ref *ref;
2304
2305 setup_git_directory();
2306
2307 remote = xcalloc(sizeof(*remote), 1);
2308
2309 argv++;
2310 for (i = 1; i < argc; i++, argv++) {
2311 char *arg = *argv;
2312
2313 if (*arg == '-') {
2314 if (!strcmp(arg, "--all")) {
2315 push_all = 1;
2316 continue;
2317 }
2318 if (!strcmp(arg, "--force")) {
2319 force_all = 1;
2320 continue;
2321 }
2322 if (!strcmp(arg, "--verbose")) {
2323 push_verbosely = 1;
2324 continue;
2325 }
2326 if (!strcmp(arg, "-d")) {
2327 delete_branch = 1;
2328 continue;
2329 }
2330 if (!strcmp(arg, "-D")) {
2331 delete_branch = 1;
2332 force_delete = 1;
2333 continue;
2334 }
2335 }
2336 if (!remote->url) {
2337 char *path = strstr(arg, "//");
2338 remote->url = arg;
2339 if (path) {
2340 path = strchr(path+2, '/');
2341 if (path)
2342 remote->path_len = strlen(path);
2343 }
2344 continue;
2345 }
2346 refspec = argv;
2347 nr_refspec = argc - i;
2348 break;
2349 }
2350
2351 if (!remote->url)
2352 usage(http_push_usage);
2353
2354 if (delete_branch && nr_refspec != 1)
2355 die("You must specify only one branch name when deleting a remote branch");
2356
2357 memset(remote_dir_exists, -1, 256);
2358
2359 http_init();
2360
2361 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2362 default_headers = curl_slist_append(default_headers, "Range:");
2363 default_headers = curl_slist_append(default_headers, "Destination:");
2364 default_headers = curl_slist_append(default_headers, "If:");
2365 default_headers = curl_slist_append(default_headers,
2366 "Pragma: no-cache");
2367
2368 /* Verify DAV compliance/lock support */
2369 if (!locking_available()) {
2370 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2371 rc = 1;
2372 goto cleanup;
2373 }
2374
2375 /* Check whether the remote has server info files */
2376 remote->can_update_info_refs = 0;
2377 remote->has_info_refs = remote_exists("info/refs");
2378 remote->has_info_packs = remote_exists("objects/info/packs");
2379 if (remote->has_info_refs) {
2380 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2381 if (info_ref_lock)
2382 remote->can_update_info_refs = 1;
2383 }
2384 if (remote->has_info_packs)
2385 fetch_indices();
2386
2387 /* Get a list of all local and remote heads to validate refspecs */
2388 get_local_heads();
2389 fprintf(stderr, "Fetching remote heads...\n");
2390 get_dav_remote_heads();
2391
2392 /* Remove a remote branch if -d or -D was specified */
2393 if (delete_branch) {
2394 if (delete_remote_branch(refspec[0], force_delete) == -1)
2395 fprintf(stderr, "Unable to delete remote branch %s\n",
2396 refspec[0]);
2397 goto cleanup;
2398 }
2399
2400 /* match them up */
2401 if (!remote_tail)
2402 remote_tail = &remote_refs;
2403 if (match_refs(local_refs, remote_refs, &remote_tail,
2404 nr_refspec, refspec, push_all))
2405 return -1;
2406 if (!remote_refs) {
2407 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2408 return 0;
2409 }
2410
2411 new_refs = 0;
2412 for (ref = remote_refs; ref; ref = ref->next) {
2413 char old_hex[60], *new_hex;
2414 const char *commit_argv[4];
2415 int commit_argc;
2416 char *new_sha1_hex, *old_sha1_hex;
2417
2418 if (!ref->peer_ref)
2419 continue;
2420 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2421 if (push_verbosely || 1)
2422 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2423 continue;
2424 }
2425
2426 if (!force_all &&
2427 !is_zero_sha1(ref->old_sha1) &&
2428 !ref->force) {
2429 if (!has_sha1_file(ref->old_sha1) ||
2430 !ref_newer(ref->peer_ref->new_sha1,
2431 ref->old_sha1)) {
2432 /* We do not have the remote ref, or
2433 * we know that the remote ref is not
2434 * an ancestor of what we are trying to
2435 * push. Either way this can be losing
2436 * commits at the remote end and likely
2437 * we were not up to date to begin with.
2438 */
2439 error("remote '%s' is not a strict "
2440 "subset of local ref '%s'. "
2441 "maybe you are not up-to-date and "
2442 "need to pull first?",
2443 ref->name,
2444 ref->peer_ref->name);
2445 rc = -2;
2446 continue;
2447 }
2448 }
2449 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2450 if (is_zero_sha1(ref->new_sha1)) {
2451 error("cannot happen anymore");
2452 rc = -3;
2453 continue;
2454 }
2455 new_refs++;
2456 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2457 new_hex = sha1_to_hex(ref->new_sha1);
2458
2459 fprintf(stderr, "updating '%s'", ref->name);
2460 if (strcmp(ref->name, ref->peer_ref->name))
2461 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2462 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2463
2464
2465 /* Lock remote branch ref */
2466 ref_lock = lock_remote(ref->name, LOCK_TIME);
2467 if (ref_lock == NULL) {
2468 fprintf(stderr, "Unable to lock remote branch %s\n",
2469 ref->name);
2470 rc = 1;
2471 continue;
2472 }
2473
2474 /* Set up revision info for this refspec */
2475 commit_argc = 3;
2476 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2477 old_sha1_hex = NULL;
2478 commit_argv[1] = "--objects";
2479 commit_argv[2] = new_sha1_hex;
2480 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2481 old_sha1_hex = xmalloc(42);
2482 sprintf(old_sha1_hex, "^%s",
2483 sha1_to_hex(ref->old_sha1));
2484 commit_argv[3] = old_sha1_hex;
2485 commit_argc++;
2486 }
2487 init_revisions(&revs, setup_git_directory());
2488 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2489 free(new_sha1_hex);
2490 if (old_sha1_hex) {
2491 free(old_sha1_hex);
2492 commit_argv[1] = NULL;
2493 }
2494
2495 /* Generate a list of objects that need to be pushed */
2496 pushing = 0;
2497 prepare_revision_walk(&revs);
2498 mark_edges_uninteresting(revs.commits);
2499 objects_to_send = get_delta(&revs, ref_lock);
2500 finish_all_active_slots();
2501
2502 /* Push missing objects to remote, this would be a
2503 convenient time to pack them first if appropriate. */
2504 pushing = 1;
2505 if (objects_to_send)
2506 fprintf(stderr, " sending %d objects\n",
2507 objects_to_send);
2508 #ifdef USE_CURL_MULTI
2509 fill_active_slots();
2510 #endif
2511 finish_all_active_slots();
2512
2513 /* Update the remote branch if all went well */
2514 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2515 rc = 1;
2516 goto unlock;
2517 }
2518
2519 unlock:
2520 if (!rc)
2521 fprintf(stderr, " done\n");
2522 unlock_remote(ref_lock);
2523 check_locks();
2524 }
2525
2526 /* Update remote server info if appropriate */
2527 if (remote->has_info_refs && new_refs) {
2528 if (info_ref_lock && remote->can_update_info_refs) {
2529 fprintf(stderr, "Updating remote server info\n");
2530 update_remote_info_refs(info_ref_lock);
2531 } else {
2532 fprintf(stderr, "Unable to update server info\n");
2533 }
2534 }
2535 if (info_ref_lock)
2536 unlock_remote(info_ref_lock);
2537
2538 cleanup:
2539 free(remote);
2540
2541 curl_slist_free_all(no_pragma_header);
2542 curl_slist_free_all(default_headers);
2543
2544 http_cleanup();
2545
2546 request = request_queue_head;
2547 while (request != NULL) {
2548 next_request = request->next;
2549 release_request(request);
2550 request = next_request;
2551 }
2552
2553 return rc;
2554 }
pclouds' git