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Merge branch 'maint'
[git/raj.git] / http-push.c
blob5b230380ccd33d8b04f8dfce24050237ae9206ad
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78
79 static int push_verbosely;
80 static int push_all = MATCH_REFS_NONE;
81 static int force_all;
82 static int dry_run;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 request->tmpfile);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 strbuf_init(&request->buffer.buf, size);
498 request->buffer.posn = 0;
499
500 /* Compress it */
501 stream.next_out = (unsigned char *)request->buffer.buf.buf;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.buf.len = stream.total_out;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 free(request->url);
668 free(request);
669 }
670
671 static void finish_request(struct transfer_request *request)
672 {
673 struct stat st;
674 struct packed_git *target;
675 struct packed_git **lst;
676
677 request->curl_result = request->slot->curl_result;
678 request->http_code = request->slot->http_code;
679 request->slot = NULL;
680
681 /* Keep locks active */
682 check_locks();
683
684 if (request->headers != NULL)
685 curl_slist_free_all(request->headers);
686
687 /* URL is reused for MOVE after PUT */
688 if (request->state != RUN_PUT) {
689 free(request->url);
690 request->url = NULL;
691 }
692
693 if (request->state == RUN_MKCOL) {
694 if (request->curl_result == CURLE_OK ||
695 request->http_code == 405) {
696 remote_dir_exists[request->obj->sha1[0]] = 1;
697 start_put(request);
698 } else {
699 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
700 sha1_to_hex(request->obj->sha1),
701 request->curl_result, request->http_code);
702 request->state = ABORTED;
703 aborted = 1;
704 }
705 } else if (request->state == RUN_PUT) {
706 if (request->curl_result == CURLE_OK) {
707 start_move(request);
708 } else {
709 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
710 sha1_to_hex(request->obj->sha1),
711 request->curl_result, request->http_code);
712 request->state = ABORTED;
713 aborted = 1;
714 }
715 } else if (request->state == RUN_MOVE) {
716 if (request->curl_result == CURLE_OK) {
717 if (push_verbosely)
718 fprintf(stderr, " sent %s\n",
719 sha1_to_hex(request->obj->sha1));
720 request->obj->flags |= REMOTE;
721 release_request(request);
722 } else {
723 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
724 sha1_to_hex(request->obj->sha1),
725 request->curl_result, request->http_code);
726 request->state = ABORTED;
727 aborted = 1;
728 }
729 } else if (request->state == RUN_FETCH_LOOSE) {
730 fchmod(request->local_fileno, 0444);
731 close(request->local_fileno); request->local_fileno = -1;
732
733 if (request->curl_result != CURLE_OK &&
734 request->http_code != 416) {
735 if (stat(request->tmpfile, &st) == 0) {
736 if (st.st_size == 0)
737 unlink(request->tmpfile);
738 }
739 } else {
740 if (request->http_code == 416)
741 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
742
743 inflateEnd(&request->stream);
744 SHA1_Final(request->real_sha1, &request->c);
745 if (request->zret != Z_STREAM_END) {
746 unlink(request->tmpfile);
747 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
748 unlink(request->tmpfile);
749 } else {
750 request->rename =
751 move_temp_to_file(
752 request->tmpfile,
753 request->filename);
754 if (request->rename == 0) {
755 request->obj->flags |= (LOCAL | REMOTE);
756 }
757 }
758 }
759
760 /* Try fetching packed if necessary */
761 if (request->obj->flags & LOCAL)
762 release_request(request);
763 else
764 start_fetch_packed(request);
765
766 } else if (request->state == RUN_FETCH_PACKED) {
767 if (request->curl_result != CURLE_OK) {
768 fprintf(stderr, "Unable to get pack file %s\n%s",
769 request->url, curl_errorstr);
770 remote->can_update_info_refs = 0;
771 } else {
772 off_t pack_size = ftell(request->local_stream);
773
774 fclose(request->local_stream);
775 request->local_stream = NULL;
776 if (!move_temp_to_file(request->tmpfile,
777 request->filename)) {
778 target = (struct packed_git *)request->userData;
779 target->pack_size = pack_size;
780 lst = &remote->packs;
781 while (*lst != target)
782 lst = &((*lst)->next);
783 *lst = (*lst)->next;
784
785 if (!verify_pack(target, 0))
786 install_packed_git(target);
787 else
788 remote->can_update_info_refs = 0;
789 }
790 }
791 release_request(request);
792 }
793 }
794
795 #ifdef USE_CURL_MULTI
796 static int fill_active_slot(void *unused)
797 {
798 struct transfer_request *request = request_queue_head;
799
800 if (aborted)
801 return 0;
802
803 for (request = request_queue_head; request; request = request->next) {
804 if (request->state == NEED_FETCH) {
805 start_fetch_loose(request);
806 return 1;
807 } else if (pushing && request->state == NEED_PUSH) {
808 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
809 start_put(request);
810 } else {
811 start_mkcol(request);
812 }
813 return 1;
814 }
815 }
816 return 0;
817 }
818 #endif
819
820 static void get_remote_object_list(unsigned char parent);
821
822 static void add_fetch_request(struct object *obj)
823 {
824 struct transfer_request *request;
825
826 check_locks();
827
828 /*
829 * Don't fetch the object if it's known to exist locally
830 * or is already in the request queue
831 */
832 if (remote_dir_exists[obj->sha1[0]] == -1)
833 get_remote_object_list(obj->sha1[0]);
834 if (obj->flags & (LOCAL | FETCHING))
835 return;
836
837 obj->flags |= FETCHING;
838 request = xmalloc(sizeof(*request));
839 request->obj = obj;
840 request->url = NULL;
841 request->lock = NULL;
842 request->headers = NULL;
843 request->local_fileno = -1;
844 request->local_stream = NULL;
845 request->state = NEED_FETCH;
846 request->next = request_queue_head;
847 request_queue_head = request;
848
849 #ifdef USE_CURL_MULTI
850 fill_active_slots();
851 step_active_slots();
852 #endif
853 }
854
855 static int add_send_request(struct object *obj, struct remote_lock *lock)
856 {
857 struct transfer_request *request = request_queue_head;
858 struct packed_git *target;
859
860 /* Keep locks active */
861 check_locks();
862
863 /*
864 * Don't push the object if it's known to exist on the remote
865 * or is already in the request queue
866 */
867 if (remote_dir_exists[obj->sha1[0]] == -1)
868 get_remote_object_list(obj->sha1[0]);
869 if (obj->flags & (REMOTE | PUSHING))
870 return 0;
871 target = find_sha1_pack(obj->sha1, remote->packs);
872 if (target) {
873 obj->flags |= REMOTE;
874 return 0;
875 }
876
877 obj->flags |= PUSHING;
878 request = xmalloc(sizeof(*request));
879 request->obj = obj;
880 request->url = NULL;
881 request->lock = lock;
882 request->headers = NULL;
883 request->local_fileno = -1;
884 request->local_stream = NULL;
885 request->state = NEED_PUSH;
886 request->next = request_queue_head;
887 request_queue_head = request;
888
889 #ifdef USE_CURL_MULTI
890 fill_active_slots();
891 step_active_slots();
892 #endif
893
894 return 1;
895 }
896
897 static int fetch_index(unsigned char *sha1)
898 {
899 char *hex = sha1_to_hex(sha1);
900 char *filename;
901 char *url;
902 char tmpfile[PATH_MAX];
903 long prev_posn = 0;
904 char range[RANGE_HEADER_SIZE];
905 struct curl_slist *range_header = NULL;
906
907 FILE *indexfile;
908 struct active_request_slot *slot;
909 struct slot_results results;
910
911 /* Don't use the index if the pack isn't there */
912 url = xmalloc(strlen(remote->url) + 64);
913 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
914 slot = get_active_slot();
915 slot->results = &results;
916 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
917 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
918 if (start_active_slot(slot)) {
919 run_active_slot(slot);
920 if (results.curl_result != CURLE_OK) {
921 free(url);
922 return error("Unable to verify pack %s is available",
923 hex);
924 }
925 } else {
926 free(url);
927 return error("Unable to start request");
928 }
929
930 if (has_pack_index(sha1)) {
931 free(url);
932 return 0;
933 }
934
935 if (push_verbosely)
936 fprintf(stderr, "Getting index for pack %s\n", hex);
937
938 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
939
940 filename = sha1_pack_index_name(sha1);
941 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
942 indexfile = fopen(tmpfile, "a");
943 if (!indexfile) {
944 free(url);
945 return error("Unable to open local file %s for pack index",
946 tmpfile);
947 }
948
949 slot = get_active_slot();
950 slot->results = &results;
951 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
952 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
953 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
954 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
955 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
956 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
957 slot->local = indexfile;
958
959 /* If there is data present from a previous transfer attempt,
960 resume where it left off */
961 prev_posn = ftell(indexfile);
962 if (prev_posn>0) {
963 if (push_verbosely)
964 fprintf(stderr,
965 "Resuming fetch of index for pack %s at byte %ld\n",
966 hex, prev_posn);
967 sprintf(range, "Range: bytes=%ld-", prev_posn);
968 range_header = curl_slist_append(range_header, range);
969 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
970 }
971
972 if (start_active_slot(slot)) {
973 run_active_slot(slot);
974 if (results.curl_result != CURLE_OK) {
975 free(url);
976 fclose(indexfile);
977 return error("Unable to get pack index %s\n%s", url,
978 curl_errorstr);
979 }
980 } else {
981 free(url);
982 fclose(indexfile);
983 return error("Unable to start request");
984 }
985
986 free(url);
987 fclose(indexfile);
988
989 return move_temp_to_file(tmpfile, filename);
990 }
991
992 static int setup_index(unsigned char *sha1)
993 {
994 struct packed_git *new_pack;
995
996 if (fetch_index(sha1))
997 return -1;
998
999 new_pack = parse_pack_index(sha1);
1000 new_pack->next = remote->packs;
1001 remote->packs = new_pack;
1002 return 0;
1003 }
1004
1005 static int fetch_indices(void)
1006 {
1007 unsigned char sha1[20];
1008 char *url;
1009 struct strbuf buffer = STRBUF_INIT;
1010 char *data;
1011 int i = 0;
1012
1013 struct active_request_slot *slot;
1014 struct slot_results results;
1015
1016 if (push_verbosely)
1017 fprintf(stderr, "Getting pack list\n");
1018
1019 url = xmalloc(strlen(remote->url) + 20);
1020 sprintf(url, "%sobjects/info/packs", remote->url);
1021
1022 slot = get_active_slot();
1023 slot->results = &results;
1024 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1025 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1027 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1028 if (start_active_slot(slot)) {
1029 run_active_slot(slot);
1030 if (results.curl_result != CURLE_OK) {
1031 strbuf_release(&buffer);
1032 free(url);
1033 if (results.http_code == 404)
1034 return 0;
1035 else
1036 return error("%s", curl_errorstr);
1037 }
1038 } else {
1039 strbuf_release(&buffer);
1040 free(url);
1041 return error("Unable to start request");
1042 }
1043 free(url);
1044
1045 data = buffer.buf;
1046 while (i < buffer.len) {
1047 switch (data[i]) {
1048 case 'P':
1049 i++;
1050 if (i + 52 < buffer.len &&
1051 !prefixcmp(data + i, " pack-") &&
1052 !prefixcmp(data + i + 46, ".pack\n")) {
1053 get_sha1_hex(data + i + 6, sha1);
1054 setup_index(sha1);
1055 i += 51;
1056 break;
1057 }
1058 default:
1059 while (data[i] != '\n')
1060 i++;
1061 }
1062 i++;
1063 }
1064
1065 strbuf_release(&buffer);
1066 return 0;
1067 }
1068
1069 static void one_remote_object(const char *hex)
1070 {
1071 unsigned char sha1[20];
1072 struct object *obj;
1073
1074 if (get_sha1_hex(hex, sha1) != 0)
1075 return;
1076
1077 obj = lookup_object(sha1);
1078 if (!obj)
1079 obj = parse_object(sha1);
1080
1081 /* Ignore remote objects that don't exist locally */
1082 if (!obj)
1083 return;
1084
1085 obj->flags |= REMOTE;
1086 if (!object_list_contains(objects, obj))
1087 object_list_insert(obj, &objects);
1088 }
1089
1090 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1091 {
1092 int *lock_flags = (int *)ctx->userData;
1093
1094 if (tag_closed) {
1095 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1096 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1097 (*lock_flags & DAV_PROP_LOCKWR)) {
1098 *lock_flags |= DAV_LOCK_OK;
1099 }
1100 *lock_flags &= DAV_LOCK_OK;
1101 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1102 *lock_flags |= DAV_PROP_LOCKWR;
1103 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1104 *lock_flags |= DAV_PROP_LOCKEX;
1105 }
1106 }
1107 }
1108
1109 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1110 {
1111 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1112
1113 if (tag_closed && ctx->cdata) {
1114 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1115 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1116 strcpy(lock->owner, ctx->cdata);
1117 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1118 if (!prefixcmp(ctx->cdata, "Second-"))
1119 lock->timeout =
1120 strtol(ctx->cdata + 7, NULL, 10);
1121 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1122 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1123 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1124 strcpy(lock->token, ctx->cdata + 16);
1125 }
1126 }
1127 }
1128 }
1129
1130 static void one_remote_ref(char *refname);
1131
1132 static void
1133 xml_start_tag(void *userData, const char *name, const char **atts)
1134 {
1135 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1136 const char *c = strchr(name, ':');
1137 int new_len;
1138
1139 if (c == NULL)
1140 c = name;
1141 else
1142 c++;
1143
1144 new_len = strlen(ctx->name) + strlen(c) + 2;
1145
1146 if (new_len > ctx->len) {
1147 ctx->name = xrealloc(ctx->name, new_len);
1148 ctx->len = new_len;
1149 }
1150 strcat(ctx->name, ".");
1151 strcat(ctx->name, c);
1152
1153 free(ctx->cdata);
1154 ctx->cdata = NULL;
1155
1156 ctx->userFunc(ctx, 0);
1157 }
1158
1159 static void
1160 xml_end_tag(void *userData, const char *name)
1161 {
1162 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1163 const char *c = strchr(name, ':');
1164 char *ep;
1165
1166 ctx->userFunc(ctx, 1);
1167
1168 if (c == NULL)
1169 c = name;
1170 else
1171 c++;
1172
1173 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1174 *ep = 0;
1175 }
1176
1177 static void
1178 xml_cdata(void *userData, const XML_Char *s, int len)
1179 {
1180 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1181 free(ctx->cdata);
1182 ctx->cdata = xmemdupz(s, len);
1183 }
1184
1185 static struct remote_lock *lock_remote(const char *path, long timeout)
1186 {
1187 struct active_request_slot *slot;
1188 struct slot_results results;
1189 struct buffer out_buffer = { STRBUF_INIT, 0 };
1190 struct strbuf in_buffer = STRBUF_INIT;
1191 char *url;
1192 char *ep;
1193 char timeout_header[25];
1194 struct remote_lock *lock = NULL;
1195 struct curl_slist *dav_headers = NULL;
1196 struct xml_ctx ctx;
1197
1198 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1199 sprintf(url, "%s%s", remote->url, path);
1200
1201 /* Make sure leading directories exist for the remote ref */
1202 ep = strchr(url + strlen(remote->url) + 1, '/');
1203 while (ep) {
1204 *ep = 0;
1205 slot = get_active_slot();
1206 slot->results = &results;
1207 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1208 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1209 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1210 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1211 if (start_active_slot(slot)) {
1212 run_active_slot(slot);
1213 if (results.curl_result != CURLE_OK &&
1214 results.http_code != 405) {
1215 fprintf(stderr,
1216 "Unable to create branch path %s\n",
1217 url);
1218 free(url);
1219 return NULL;
1220 }
1221 } else {
1222 fprintf(stderr, "Unable to start MKCOL request\n");
1223 free(url);
1224 return NULL;
1225 }
1226 *ep = '/';
1227 ep = strchr(ep + 1, '/');
1228 }
1229
1230 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1231
1232 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1233 dav_headers = curl_slist_append(dav_headers, timeout_header);
1234 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1235
1236 slot = get_active_slot();
1237 slot->results = &results;
1238 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1240 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1241 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1244 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1245 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1246 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1247
1248 lock = xcalloc(1, sizeof(*lock));
1249 lock->timeout = -1;
1250
1251 if (start_active_slot(slot)) {
1252 run_active_slot(slot);
1253 if (results.curl_result == CURLE_OK) {
1254 XML_Parser parser = XML_ParserCreate(NULL);
1255 enum XML_Status result;
1256 ctx.name = xcalloc(10, 1);
1257 ctx.len = 0;
1258 ctx.cdata = NULL;
1259 ctx.userFunc = handle_new_lock_ctx;
1260 ctx.userData = lock;
1261 XML_SetUserData(parser, &ctx);
1262 XML_SetElementHandler(parser, xml_start_tag,
1263 xml_end_tag);
1264 XML_SetCharacterDataHandler(parser, xml_cdata);
1265 result = XML_Parse(parser, in_buffer.buf,
1266 in_buffer.len, 1);
1267 free(ctx.name);
1268 if (result != XML_STATUS_OK) {
1269 fprintf(stderr, "XML error: %s\n",
1270 XML_ErrorString(
1271 XML_GetErrorCode(parser)));
1272 lock->timeout = -1;
1273 }
1274 XML_ParserFree(parser);
1275 }
1276 } else {
1277 fprintf(stderr, "Unable to start LOCK request\n");
1278 }
1279
1280 curl_slist_free_all(dav_headers);
1281 strbuf_release(&out_buffer.buf);
1282 strbuf_release(&in_buffer);
1283
1284 if (lock->token == NULL || lock->timeout <= 0) {
1285 free(lock->token);
1286 free(lock->owner);
1287 free(url);
1288 free(lock);
1289 lock = NULL;
1290 } else {
1291 lock->url = url;
1292 lock->start_time = time(NULL);
1293 lock->next = remote->locks;
1294 remote->locks = lock;
1295 }
1296
1297 return lock;
1298 }
1299
1300 static int unlock_remote(struct remote_lock *lock)
1301 {
1302 struct active_request_slot *slot;
1303 struct slot_results results;
1304 struct remote_lock *prev = remote->locks;
1305 char *lock_token_header;
1306 struct curl_slist *dav_headers = NULL;
1307 int rc = 0;
1308
1309 lock_token_header = xmalloc(strlen(lock->token) + 31);
1310 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1311 lock->token);
1312 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1313
1314 slot = get_active_slot();
1315 slot->results = &results;
1316 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1317 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1318 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1319 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1320
1321 if (start_active_slot(slot)) {
1322 run_active_slot(slot);
1323 if (results.curl_result == CURLE_OK)
1324 rc = 1;
1325 else
1326 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1327 results.http_code);
1328 } else {
1329 fprintf(stderr, "Unable to start UNLOCK request\n");
1330 }
1331
1332 curl_slist_free_all(dav_headers);
1333 free(lock_token_header);
1334
1335 if (remote->locks == lock) {
1336 remote->locks = lock->next;
1337 } else {
1338 while (prev && prev->next != lock)
1339 prev = prev->next;
1340 if (prev)
1341 prev->next = prev->next->next;
1342 }
1343
1344 free(lock->owner);
1345 free(lock->url);
1346 free(lock->token);
1347 free(lock);
1348
1349 return rc;
1350 }
1351
1352 static void remote_ls(const char *path, int flags,
1353 void (*userFunc)(struct remote_ls_ctx *ls),
1354 void *userData);
1355
1356 static void process_ls_object(struct remote_ls_ctx *ls)
1357 {
1358 unsigned int *parent = (unsigned int *)ls->userData;
1359 char *path = ls->dentry_name;
1360 char *obj_hex;
1361
1362 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1363 remote_dir_exists[*parent] = 1;
1364 return;
1365 }
1366
1367 if (strlen(path) != 49)
1368 return;
1369 path += 8;
1370 obj_hex = xmalloc(strlen(path));
1371 /* NB: path is not null-terminated, can not use strlcpy here */
1372 memcpy(obj_hex, path, 2);
1373 strcpy(obj_hex + 2, path + 3);
1374 one_remote_object(obj_hex);
1375 free(obj_hex);
1376 }
1377
1378 static void process_ls_ref(struct remote_ls_ctx *ls)
1379 {
1380 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1381 fprintf(stderr, " %s\n", ls->dentry_name);
1382 return;
1383 }
1384
1385 if (!(ls->dentry_flags & IS_DIR))
1386 one_remote_ref(ls->dentry_name);
1387 }
1388
1389 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1390 {
1391 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1392
1393 if (tag_closed) {
1394 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1395 if (ls->dentry_flags & IS_DIR) {
1396 if (ls->flags & PROCESS_DIRS) {
1397 ls->userFunc(ls);
1398 }
1399 if (strcmp(ls->dentry_name, ls->path) &&
1400 ls->flags & RECURSIVE) {
1401 remote_ls(ls->dentry_name,
1402 ls->flags,
1403 ls->userFunc,
1404 ls->userData);
1405 }
1406 } else if (ls->flags & PROCESS_FILES) {
1407 ls->userFunc(ls);
1408 }
1409 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1410 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1411 remote->path_len + 1);
1412 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1413 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1414 ls->dentry_flags |= IS_DIR;
1415 }
1416 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1417 free(ls->dentry_name);
1418 ls->dentry_name = NULL;
1419 ls->dentry_flags = 0;
1420 }
1421 }
1422
1423 static void remote_ls(const char *path, int flags,
1424 void (*userFunc)(struct remote_ls_ctx *ls),
1425 void *userData)
1426 {
1427 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1428 struct active_request_slot *slot;
1429 struct slot_results results;
1430 struct strbuf in_buffer = STRBUF_INIT;
1431 struct buffer out_buffer = { STRBUF_INIT, 0 };
1432 struct curl_slist *dav_headers = NULL;
1433 struct xml_ctx ctx;
1434 struct remote_ls_ctx ls;
1435
1436 ls.flags = flags;
1437 ls.path = xstrdup(path);
1438 ls.dentry_name = NULL;
1439 ls.dentry_flags = 0;
1440 ls.userData = userData;
1441 ls.userFunc = userFunc;
1442
1443 sprintf(url, "%s%s", remote->url, path);
1444
1445 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1446
1447 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1448 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1449
1450 slot = get_active_slot();
1451 slot->results = &results;
1452 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1453 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1454 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1455 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1456 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1457 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1458 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1459 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1460 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1461
1462 if (start_active_slot(slot)) {
1463 run_active_slot(slot);
1464 if (results.curl_result == CURLE_OK) {
1465 XML_Parser parser = XML_ParserCreate(NULL);
1466 enum XML_Status result;
1467 ctx.name = xcalloc(10, 1);
1468 ctx.len = 0;
1469 ctx.cdata = NULL;
1470 ctx.userFunc = handle_remote_ls_ctx;
1471 ctx.userData = &ls;
1472 XML_SetUserData(parser, &ctx);
1473 XML_SetElementHandler(parser, xml_start_tag,
1474 xml_end_tag);
1475 XML_SetCharacterDataHandler(parser, xml_cdata);
1476 result = XML_Parse(parser, in_buffer.buf,
1477 in_buffer.len, 1);
1478 free(ctx.name);
1479
1480 if (result != XML_STATUS_OK) {
1481 fprintf(stderr, "XML error: %s\n",
1482 XML_ErrorString(
1483 XML_GetErrorCode(parser)));
1484 }
1485 XML_ParserFree(parser);
1486 }
1487 } else {
1488 fprintf(stderr, "Unable to start PROPFIND request\n");
1489 }
1490
1491 free(ls.path);
1492 free(url);
1493 strbuf_release(&out_buffer.buf);
1494 strbuf_release(&in_buffer);
1495 curl_slist_free_all(dav_headers);
1496 }
1497
1498 static void get_remote_object_list(unsigned char parent)
1499 {
1500 char path[] = "objects/XX/";
1501 static const char hex[] = "0123456789abcdef";
1502 unsigned int val = parent;
1503
1504 path[8] = hex[val >> 4];
1505 path[9] = hex[val & 0xf];
1506 remote_dir_exists[val] = 0;
1507 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1508 process_ls_object, &val);
1509 }
1510
1511 static int locking_available(void)
1512 {
1513 struct active_request_slot *slot;
1514 struct slot_results results;
1515 struct strbuf in_buffer = STRBUF_INIT;
1516 struct buffer out_buffer = { STRBUF_INIT, 0 };
1517 struct curl_slist *dav_headers = NULL;
1518 struct xml_ctx ctx;
1519 int lock_flags = 0;
1520
1521 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1522
1523 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1524 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1525
1526 slot = get_active_slot();
1527 slot->results = &results;
1528 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1529 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1530 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1531 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1532 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1533 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1534 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1535 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1536 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1537
1538 if (start_active_slot(slot)) {
1539 run_active_slot(slot);
1540 if (results.curl_result == CURLE_OK) {
1541 XML_Parser parser = XML_ParserCreate(NULL);
1542 enum XML_Status result;
1543 ctx.name = xcalloc(10, 1);
1544 ctx.len = 0;
1545 ctx.cdata = NULL;
1546 ctx.userFunc = handle_lockprop_ctx;
1547 ctx.userData = &lock_flags;
1548 XML_SetUserData(parser, &ctx);
1549 XML_SetElementHandler(parser, xml_start_tag,
1550 xml_end_tag);
1551 result = XML_Parse(parser, in_buffer.buf,
1552 in_buffer.len, 1);
1553 free(ctx.name);
1554
1555 if (result != XML_STATUS_OK) {
1556 fprintf(stderr, "XML error: %s\n",
1557 XML_ErrorString(
1558 XML_GetErrorCode(parser)));
1559 lock_flags = 0;
1560 }
1561 XML_ParserFree(parser);
1562 if (!lock_flags)
1563 error("Error: no DAV locking support on %s",
1564 remote->url);
1565
1566 } else {
1567 error("Cannot access URL %s, return code %d",
1568 remote->url, results.curl_result);
1569 lock_flags = 0;
1570 }
1571 } else {
1572 error("Unable to start PROPFIND request on %s", remote->url);
1573 }
1574
1575 strbuf_release(&out_buffer.buf);
1576 strbuf_release(&in_buffer);
1577 curl_slist_free_all(dav_headers);
1578
1579 return lock_flags;
1580 }
1581
1582 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1583 {
1584 struct object_list *entry = xmalloc(sizeof(struct object_list));
1585 entry->item = obj;
1586 entry->next = *p;
1587 *p = entry;
1588 return &entry->next;
1589 }
1590
1591 static struct object_list **process_blob(struct blob *blob,
1592 struct object_list **p,
1593 struct name_path *path,
1594 const char *name)
1595 {
1596 struct object *obj = &blob->object;
1597
1598 obj->flags |= LOCAL;
1599
1600 if (obj->flags & (UNINTERESTING | SEEN))
1601 return p;
1602
1603 obj->flags |= SEEN;
1604 return add_one_object(obj, p);
1605 }
1606
1607 static struct object_list **process_tree(struct tree *tree,
1608 struct object_list **p,
1609 struct name_path *path,
1610 const char *name)
1611 {
1612 struct object *obj = &tree->object;
1613 struct tree_desc desc;
1614 struct name_entry entry;
1615 struct name_path me;
1616
1617 obj->flags |= LOCAL;
1618
1619 if (obj->flags & (UNINTERESTING | SEEN))
1620 return p;
1621 if (parse_tree(tree) < 0)
1622 die("bad tree object %s", sha1_to_hex(obj->sha1));
1623
1624 obj->flags |= SEEN;
1625 name = xstrdup(name);
1626 p = add_one_object(obj, p);
1627 me.up = path;
1628 me.elem = name;
1629 me.elem_len = strlen(name);
1630
1631 init_tree_desc(&desc, tree->buffer, tree->size);
1632
1633 while (tree_entry(&desc, &entry))
1634 switch (object_type(entry.mode)) {
1635 case OBJ_TREE:
1636 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1637 break;
1638 case OBJ_BLOB:
1639 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1640 break;
1641 default:
1642 /* Subproject commit - not in this repository */
1643 break;
1644 }
1645
1646 free(tree->buffer);
1647 tree->buffer = NULL;
1648 return p;
1649 }
1650
1651 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1652 {
1653 int i;
1654 struct commit *commit;
1655 struct object_list **p = &objects;
1656 int count = 0;
1657
1658 while ((commit = get_revision(revs)) != NULL) {
1659 p = process_tree(commit->tree, p, NULL, "");
1660 commit->object.flags |= LOCAL;
1661 if (!(commit->object.flags & UNINTERESTING))
1662 count += add_send_request(&commit->object, lock);
1663 }
1664
1665 for (i = 0; i < revs->pending.nr; i++) {
1666 struct object_array_entry *entry = revs->pending.objects + i;
1667 struct object *obj = entry->item;
1668 const char *name = entry->name;
1669
1670 if (obj->flags & (UNINTERESTING | SEEN))
1671 continue;
1672 if (obj->type == OBJ_TAG) {
1673 obj->flags |= SEEN;
1674 p = add_one_object(obj, p);
1675 continue;
1676 }
1677 if (obj->type == OBJ_TREE) {
1678 p = process_tree((struct tree *)obj, p, NULL, name);
1679 continue;
1680 }
1681 if (obj->type == OBJ_BLOB) {
1682 p = process_blob((struct blob *)obj, p, NULL, name);
1683 continue;
1684 }
1685 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1686 }
1687
1688 while (objects) {
1689 if (!(objects->item->flags & UNINTERESTING))
1690 count += add_send_request(objects->item, lock);
1691 objects = objects->next;
1692 }
1693
1694 return count;
1695 }
1696
1697 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1698 {
1699 struct active_request_slot *slot;
1700 struct slot_results results;
1701 char *if_header;
1702 struct buffer out_buffer = { STRBUF_INIT, 0 };
1703 struct curl_slist *dav_headers = NULL;
1704
1705 if_header = xmalloc(strlen(lock->token) + 25);
1706 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1707 dav_headers = curl_slist_append(dav_headers, if_header);
1708
1709 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1710
1711 slot = get_active_slot();
1712 slot->results = &results;
1713 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1714 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1715 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1716 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1717 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1718 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1719 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1720 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1721 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1722
1723 if (start_active_slot(slot)) {
1724 run_active_slot(slot);
1725 strbuf_release(&out_buffer.buf);
1726 free(if_header);
1727 if (results.curl_result != CURLE_OK) {
1728 fprintf(stderr,
1729 "PUT error: curl result=%d, HTTP code=%ld\n",
1730 results.curl_result, results.http_code);
1731 /* We should attempt recovery? */
1732 return 0;
1733 }
1734 } else {
1735 strbuf_release(&out_buffer.buf);
1736 free(if_header);
1737 fprintf(stderr, "Unable to start PUT request\n");
1738 return 0;
1739 }
1740
1741 return 1;
1742 }
1743
1744 static struct ref *local_refs, **local_tail;
1745 static struct ref *remote_refs, **remote_tail;
1746
1747 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1748 {
1749 struct ref *ref;
1750 int len = strlen(refname) + 1;
1751 ref = xcalloc(1, sizeof(*ref) + len);
1752 hashcpy(ref->new_sha1, sha1);
1753 memcpy(ref->name, refname, len);
1754 *local_tail = ref;
1755 local_tail = &ref->next;
1756 return 0;
1757 }
1758
1759 static void one_remote_ref(char *refname)
1760 {
1761 struct ref *ref;
1762 unsigned char remote_sha1[20];
1763 struct object *obj;
1764 int len = strlen(refname) + 1;
1765
1766 if (http_fetch_ref(remote->url, refname + 5 /* "refs/" */,
1767 remote_sha1) != 0) {
1768 fprintf(stderr,
1769 "Unable to fetch ref %s from %s\n",
1770 refname, remote->url);
1771 return;
1772 }
1773
1774 /*
1775 * Fetch a copy of the object if it doesn't exist locally - it
1776 * may be required for updating server info later.
1777 */
1778 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1779 obj = lookup_unknown_object(remote_sha1);
1780 if (obj) {
1781 fprintf(stderr, " fetch %s for %s\n",
1782 sha1_to_hex(remote_sha1), refname);
1783 add_fetch_request(obj);
1784 }
1785 }
1786
1787 ref = xcalloc(1, sizeof(*ref) + len);
1788 hashcpy(ref->old_sha1, remote_sha1);
1789 memcpy(ref->name, refname, len);
1790 *remote_tail = ref;
1791 remote_tail = &ref->next;
1792 }
1793
1794 static void get_local_heads(void)
1795 {
1796 local_tail = &local_refs;
1797 for_each_ref(one_local_ref, NULL);
1798 }
1799
1800 static void get_dav_remote_heads(void)
1801 {
1802 remote_tail = &remote_refs;
1803 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1804 }
1805
1806 static int is_zero_sha1(const unsigned char *sha1)
1807 {
1808 int i;
1809
1810 for (i = 0; i < 20; i++) {
1811 if (*sha1++)
1812 return 0;
1813 }
1814 return 1;
1815 }
1816
1817 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1818 {
1819 while (list) {
1820 struct commit_list *temp = list;
1821 temp->item->object.flags &= ~mark;
1822 list = temp->next;
1823 free(temp);
1824 }
1825 }
1826
1827 static int ref_newer(const unsigned char *new_sha1,
1828 const unsigned char *old_sha1)
1829 {
1830 struct object *o;
1831 struct commit *old, *new;
1832 struct commit_list *list, *used;
1833 int found = 0;
1834
1835 /* Both new and old must be commit-ish and new is descendant of
1836 * old. Otherwise we require --force.
1837 */
1838 o = deref_tag(parse_object(old_sha1), NULL, 0);
1839 if (!o || o->type != OBJ_COMMIT)
1840 return 0;
1841 old = (struct commit *) o;
1842
1843 o = deref_tag(parse_object(new_sha1), NULL, 0);
1844 if (!o || o->type != OBJ_COMMIT)
1845 return 0;
1846 new = (struct commit *) o;
1847
1848 if (parse_commit(new) < 0)
1849 return 0;
1850
1851 used = list = NULL;
1852 commit_list_insert(new, &list);
1853 while (list) {
1854 new = pop_most_recent_commit(&list, TMP_MARK);
1855 commit_list_insert(new, &used);
1856 if (new == old) {
1857 found = 1;
1858 break;
1859 }
1860 }
1861 unmark_and_free(list, TMP_MARK);
1862 unmark_and_free(used, TMP_MARK);
1863 return found;
1864 }
1865
1866 static void mark_edge_parents_uninteresting(struct commit *commit)
1867 {
1868 struct commit_list *parents;
1869
1870 for (parents = commit->parents; parents; parents = parents->next) {
1871 struct commit *parent = parents->item;
1872 if (!(parent->object.flags & UNINTERESTING))
1873 continue;
1874 mark_tree_uninteresting(parent->tree);
1875 }
1876 }
1877
1878 static void mark_edges_uninteresting(struct commit_list *list)
1879 {
1880 for ( ; list; list = list->next) {
1881 struct commit *commit = list->item;
1882
1883 if (commit->object.flags & UNINTERESTING) {
1884 mark_tree_uninteresting(commit->tree);
1885 continue;
1886 }
1887 mark_edge_parents_uninteresting(commit);
1888 }
1889 }
1890
1891 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1892 {
1893 struct strbuf *buf = (struct strbuf *)ls->userData;
1894 unsigned char remote_sha1[20];
1895 struct object *o;
1896 int len;
1897 char *ref_info;
1898
1899 if (http_fetch_ref(remote->url, ls->dentry_name + 5 /* "refs/" */,
1900 remote_sha1) != 0) {
1901 fprintf(stderr,
1902 "Unable to fetch ref %s from %s\n",
1903 ls->dentry_name, remote->url);
1904 aborted = 1;
1905 return;
1906 }
1907
1908 o = parse_object(remote_sha1);
1909 if (!o) {
1910 fprintf(stderr,
1911 "Unable to parse object %s for remote ref %s\n",
1912 sha1_to_hex(remote_sha1), ls->dentry_name);
1913 aborted = 1;
1914 return;
1915 }
1916
1917 len = strlen(ls->dentry_name) + 42;
1918 ref_info = xcalloc(len + 1, 1);
1919 sprintf(ref_info, "%s %s\n",
1920 sha1_to_hex(remote_sha1), ls->dentry_name);
1921 fwrite_buffer(ref_info, 1, len, buf);
1922 free(ref_info);
1923
1924 if (o->type == OBJ_TAG) {
1925 o = deref_tag(o, ls->dentry_name, 0);
1926 if (o) {
1927 len = strlen(ls->dentry_name) + 45;
1928 ref_info = xcalloc(len + 1, 1);
1929 sprintf(ref_info, "%s %s^{}\n",
1930 sha1_to_hex(o->sha1), ls->dentry_name);
1931 fwrite_buffer(ref_info, 1, len, buf);
1932 free(ref_info);
1933 }
1934 }
1935 }
1936
1937 static void update_remote_info_refs(struct remote_lock *lock)
1938 {
1939 struct buffer buffer = { STRBUF_INIT, 0 };
1940 struct active_request_slot *slot;
1941 struct slot_results results;
1942 char *if_header;
1943 struct curl_slist *dav_headers = NULL;
1944
1945 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1946 add_remote_info_ref, &buffer.buf);
1947 if (!aborted) {
1948 if_header = xmalloc(strlen(lock->token) + 25);
1949 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1950 dav_headers = curl_slist_append(dav_headers, if_header);
1951
1952 slot = get_active_slot();
1953 slot->results = &results;
1954 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1955 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1956 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1957 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1958 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1959 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1960 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1961 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1962 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1963
1964 if (start_active_slot(slot)) {
1965 run_active_slot(slot);
1966 if (results.curl_result != CURLE_OK) {
1967 fprintf(stderr,
1968 "PUT error: curl result=%d, HTTP code=%ld\n",
1969 results.curl_result, results.http_code);
1970 }
1971 }
1972 free(if_header);
1973 }
1974 strbuf_release(&buffer.buf);
1975 }
1976
1977 static int remote_exists(const char *path)
1978 {
1979 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1980 struct active_request_slot *slot;
1981 struct slot_results results;
1982 int ret = -1;
1983
1984 sprintf(url, "%s%s", remote->url, path);
1985
1986 slot = get_active_slot();
1987 slot->results = &results;
1988 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1989 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1990
1991 if (start_active_slot(slot)) {
1992 run_active_slot(slot);
1993 if (results.http_code == 404)
1994 ret = 0;
1995 else if (results.curl_result == CURLE_OK)
1996 ret = 1;
1997 else
1998 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1999 } else {
2000 fprintf(stderr, "Unable to start HEAD request\n");
2001 }
2002
2003 free(url);
2004 return ret;
2005 }
2006
2007 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2008 {
2009 char *url;
2010 struct strbuf buffer = STRBUF_INIT;
2011 struct active_request_slot *slot;
2012 struct slot_results results;
2013
2014 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2015 sprintf(url, "%s%s", remote->url, path);
2016
2017 slot = get_active_slot();
2018 slot->results = &results;
2019 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2020 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2021 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2022 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2023 if (start_active_slot(slot)) {
2024 run_active_slot(slot);
2025 if (results.curl_result != CURLE_OK) {
2026 die("Couldn't get %s for remote symref\n%s",
2027 url, curl_errorstr);
2028 }
2029 } else {
2030 die("Unable to start remote symref request");
2031 }
2032 free(url);
2033
2034 free(*symref);
2035 *symref = NULL;
2036 hashclr(sha1);
2037
2038 if (buffer.len == 0)
2039 return;
2040
2041 /* If it's a symref, set the refname; otherwise try for a sha1 */
2042 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2043 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2044 } else {
2045 get_sha1_hex(buffer.buf, sha1);
2046 }
2047
2048 strbuf_release(&buffer);
2049 }
2050
2051 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2052 {
2053 struct commit *head = lookup_commit(head_sha1);
2054 struct commit *branch = lookup_commit(branch_sha1);
2055 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2056
2057 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2058 }
2059
2060 static int delete_remote_branch(char *pattern, int force)
2061 {
2062 struct ref *refs = remote_refs;
2063 struct ref *remote_ref = NULL;
2064 unsigned char head_sha1[20];
2065 char *symref = NULL;
2066 int match;
2067 int patlen = strlen(pattern);
2068 int i;
2069 struct active_request_slot *slot;
2070 struct slot_results results;
2071 char *url;
2072
2073 /* Find the remote branch(es) matching the specified branch name */
2074 for (match = 0; refs; refs = refs->next) {
2075 char *name = refs->name;
2076 int namelen = strlen(name);
2077 if (namelen < patlen ||
2078 memcmp(name + namelen - patlen, pattern, patlen))
2079 continue;
2080 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2081 continue;
2082 match++;
2083 remote_ref = refs;
2084 }
2085 if (match == 0)
2086 return error("No remote branch matches %s", pattern);
2087 if (match != 1)
2088 return error("More than one remote branch matches %s",
2089 pattern);
2090
2091 /*
2092 * Remote HEAD must be a symref (not exactly foolproof; a remote
2093 * symlink to a symref will look like a symref)
2094 */
2095 fetch_symref("HEAD", &symref, head_sha1);
2096 if (!symref)
2097 return error("Remote HEAD is not a symref");
2098
2099 /* Remote branch must not be the remote HEAD */
2100 for (i=0; symref && i<MAXDEPTH; i++) {
2101 if (!strcmp(remote_ref->name, symref))
2102 return error("Remote branch %s is the current HEAD",
2103 remote_ref->name);
2104 fetch_symref(symref, &symref, head_sha1);
2105 }
2106
2107 /* Run extra sanity checks if delete is not forced */
2108 if (!force) {
2109 /* Remote HEAD must resolve to a known object */
2110 if (symref)
2111 return error("Remote HEAD symrefs too deep");
2112 if (is_zero_sha1(head_sha1))
2113 return error("Unable to resolve remote HEAD");
2114 if (!has_sha1_file(head_sha1))
2115 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2116
2117 /* Remote branch must resolve to a known object */
2118 if (is_zero_sha1(remote_ref->old_sha1))
2119 return error("Unable to resolve remote branch %s",
2120 remote_ref->name);
2121 if (!has_sha1_file(remote_ref->old_sha1))
2122 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));
2123
2124 /* Remote branch must be an ancestor of remote HEAD */
2125 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2126 return error("The branch '%s' is not an ancestor "
2127 "of your current HEAD.\n"
2128 "If you are sure you want to delete it,"
2129 " run:\n\t'git http-push -D %s %s'",
2130 remote_ref->name, remote->url, pattern);
2131 }
2132 }
2133
2134 /* Send delete request */
2135 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2136 if (dry_run)
2137 return 0;
2138 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2139 sprintf(url, "%s%s", remote->url, remote_ref->name);
2140 slot = get_active_slot();
2141 slot->results = &results;
2142 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2143 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2144 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2145 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2146 if (start_active_slot(slot)) {
2147 run_active_slot(slot);
2148 free(url);
2149 if (results.curl_result != CURLE_OK)
2150 return error("DELETE request failed (%d/%ld)\n",
2151 results.curl_result, results.http_code);
2152 } else {
2153 free(url);
2154 return error("Unable to start DELETE request");
2155 }
2156
2157 return 0;
2158 }
2159
2160 int main(int argc, char **argv)
2161 {
2162 struct transfer_request *request;
2163 struct transfer_request *next_request;
2164 int nr_refspec = 0;
2165 char **refspec = NULL;
2166 struct remote_lock *ref_lock = NULL;
2167 struct remote_lock *info_ref_lock = NULL;
2168 struct rev_info revs;
2169 int delete_branch = 0;
2170 int force_delete = 0;
2171 int objects_to_send;
2172 int rc = 0;
2173 int i;
2174 int new_refs;
2175 struct ref *ref;
2176 char *rewritten_url = NULL;
2177
2178 setup_git_directory();
2179
2180 remote = xcalloc(sizeof(*remote), 1);
2181
2182 argv++;
2183 for (i = 1; i < argc; i++, argv++) {
2184 char *arg = *argv;
2185
2186 if (*arg == '-') {
2187 if (!strcmp(arg, "--all")) {
2188 push_all = MATCH_REFS_ALL;
2189 continue;
2190 }
2191 if (!strcmp(arg, "--force")) {
2192 force_all = 1;
2193 continue;
2194 }
2195 if (!strcmp(arg, "--dry-run")) {
2196 dry_run = 1;
2197 continue;
2198 }
2199 if (!strcmp(arg, "--verbose")) {
2200 push_verbosely = 1;
2201 continue;
2202 }
2203 if (!strcmp(arg, "-d")) {
2204 delete_branch = 1;
2205 continue;
2206 }
2207 if (!strcmp(arg, "-D")) {
2208 delete_branch = 1;
2209 force_delete = 1;
2210 continue;
2211 }
2212 }
2213 if (!remote->url) {
2214 char *path = strstr(arg, "//");
2215 remote->url = arg;
2216 if (path) {
2217 path = strchr(path+2, '/');
2218 if (path)
2219 remote->path_len = strlen(path);
2220 }
2221 continue;
2222 }
2223 refspec = argv;
2224 nr_refspec = argc - i;
2225 break;
2226 }
2227
2228 #ifndef USE_CURL_MULTI
2229 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2230 #endif
2231
2232 if (!remote->url)
2233 usage(http_push_usage);
2234
2235 if (delete_branch && nr_refspec != 1)
2236 die("You must specify only one branch name when deleting a remote branch");
2237
2238 memset(remote_dir_exists, -1, 256);
2239
2240 http_init(NULL);
2241
2242 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2243
2244 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2245 rewritten_url = malloc(strlen(remote->url)+2);
2246 strcpy(rewritten_url, remote->url);
2247 strcat(rewritten_url, "/");
2248 remote->url = rewritten_url;
2249 ++remote->path_len;
2250 }
2251
2252 /* Verify DAV compliance/lock support */
2253 if (!locking_available()) {
2254 rc = 1;
2255 goto cleanup;
2256 }
2257
2258 /* Check whether the remote has server info files */
2259 remote->can_update_info_refs = 0;
2260 remote->has_info_refs = remote_exists("info/refs");
2261 remote->has_info_packs = remote_exists("objects/info/packs");
2262 if (remote->has_info_refs) {
2263 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2264 if (info_ref_lock)
2265 remote->can_update_info_refs = 1;
2266 else {
2267 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2268 rc = 1;
2269 goto cleanup;
2270 }
2271 }
2272 if (remote->has_info_packs)
2273 fetch_indices();
2274
2275 /* Get a list of all local and remote heads to validate refspecs */
2276 get_local_heads();
2277 fprintf(stderr, "Fetching remote heads...\n");
2278 get_dav_remote_heads();
2279
2280 /* Remove a remote branch if -d or -D was specified */
2281 if (delete_branch) {
2282 if (delete_remote_branch(refspec[0], force_delete) == -1)
2283 fprintf(stderr, "Unable to delete remote branch %s\n",
2284 refspec[0]);
2285 goto cleanup;
2286 }
2287
2288 /* match them up */
2289 if (!remote_tail)
2290 remote_tail = &remote_refs;
2291 if (match_refs(local_refs, remote_refs, &remote_tail,
2292 nr_refspec, (const char **) refspec, push_all)) {
2293 rc = -1;
2294 goto cleanup;
2295 }
2296 if (!remote_refs) {
2297 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2298 rc = 0;
2299 goto cleanup;
2300 }
2301
2302 new_refs = 0;
2303 for (ref = remote_refs; ref; ref = ref->next) {
2304 char old_hex[60], *new_hex;
2305 const char *commit_argv[4];
2306 int commit_argc;
2307 char *new_sha1_hex, *old_sha1_hex;
2308
2309 if (!ref->peer_ref)
2310 continue;
2311
2312 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2313 if (delete_remote_branch(ref->name, 1) == -1) {
2314 error("Could not remove %s", ref->name);
2315 rc = -4;
2316 }
2317 new_refs++;
2318 continue;
2319 }
2320
2321 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2322 if (push_verbosely || 1)
2323 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2324 continue;
2325 }
2326
2327 if (!force_all &&
2328 !is_zero_sha1(ref->old_sha1) &&
2329 !ref->force) {
2330 if (!has_sha1_file(ref->old_sha1) ||
2331 !ref_newer(ref->peer_ref->new_sha1,
2332 ref->old_sha1)) {
2333 /*
2334 * We do not have the remote ref, or
2335 * we know that the remote ref is not
2336 * an ancestor of what we are trying to
2337 * push. Either way this can be losing
2338 * commits at the remote end and likely
2339 * we were not up to date to begin with.
2340 */
2341 error("remote '%s' is not an ancestor of\n"
2342 "local '%s'.\n"
2343 "Maybe you are not up-to-date and "
2344 "need to pull first?",
2345 ref->name,
2346 ref->peer_ref->name);
2347 rc = -2;
2348 continue;
2349 }
2350 }
2351 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2352 new_refs++;
2353 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2354 new_hex = sha1_to_hex(ref->new_sha1);
2355
2356 fprintf(stderr, "updating '%s'", ref->name);
2357 if (strcmp(ref->name, ref->peer_ref->name))
2358 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2359 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2360 if (dry_run)
2361 continue;
2362
2363 /* Lock remote branch ref */
2364 ref_lock = lock_remote(ref->name, LOCK_TIME);
2365 if (ref_lock == NULL) {
2366 fprintf(stderr, "Unable to lock remote branch %s\n",
2367 ref->name);
2368 rc = 1;
2369 continue;
2370 }
2371
2372 /* Set up revision info for this refspec */
2373 commit_argc = 3;
2374 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2375 old_sha1_hex = NULL;
2376 commit_argv[1] = "--objects";
2377 commit_argv[2] = new_sha1_hex;
2378 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2379 old_sha1_hex = xmalloc(42);
2380 sprintf(old_sha1_hex, "^%s",
2381 sha1_to_hex(ref->old_sha1));
2382 commit_argv[3] = old_sha1_hex;
2383 commit_argc++;
2384 }
2385 init_revisions(&revs, setup_git_directory());
2386 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2387 free(new_sha1_hex);
2388 if (old_sha1_hex) {
2389 free(old_sha1_hex);
2390 commit_argv[1] = NULL;
2391 }
2392
2393 /* Generate a list of objects that need to be pushed */
2394 pushing = 0;
2395 if (prepare_revision_walk(&revs))
2396 die("revision walk setup failed");
2397 mark_edges_uninteresting(revs.commits);
2398 objects_to_send = get_delta(&revs, ref_lock);
2399 finish_all_active_slots();
2400
2401 /* Push missing objects to remote, this would be a
2402 convenient time to pack them first if appropriate. */
2403 pushing = 1;
2404 if (objects_to_send)
2405 fprintf(stderr, " sending %d objects\n",
2406 objects_to_send);
2407 #ifdef USE_CURL_MULTI
2408 fill_active_slots();
2409 add_fill_function(NULL, fill_active_slot);
2410 #endif
2411 do {
2412 finish_all_active_slots();
2413 #ifdef USE_CURL_MULTI
2414 fill_active_slots();
2415 #endif
2416 } while (request_queue_head && !aborted);
2417
2418 /* Update the remote branch if all went well */
2419 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2420 rc = 1;
2421
2422 if (!rc)
2423 fprintf(stderr, " done\n");
2424 unlock_remote(ref_lock);
2425 check_locks();
2426 }
2427
2428 /* Update remote server info if appropriate */
2429 if (remote->has_info_refs && new_refs) {
2430 if (info_ref_lock && remote->can_update_info_refs) {
2431 fprintf(stderr, "Updating remote server info\n");
2432 if (!dry_run)
2433 update_remote_info_refs(info_ref_lock);
2434 } else {
2435 fprintf(stderr, "Unable to update server info\n");
2436 }
2437 }
2438
2439 cleanup:
2440 free(rewritten_url);
2441 if (info_ref_lock)
2442 unlock_remote(info_ref_lock);
2443 free(remote);
2444
2445 curl_slist_free_all(no_pragma_header);
2446
2447 http_cleanup();
2448
2449 request = request_queue_head;
2450 while (request != NULL) {
2451 next_request = request->next;
2452 release_request(request);
2453 request = next_request;
2454 }
2455
2456 return rc;
2457 }
ramsay's fork of git