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Merge branch 'bs/maint-1.6.0-tree-walk-prefix' into maint-1.6.1
[git/kirr.git] / http-push.c
blobcb5bf95a736c571259aef51884cc20e4169bf707
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12 #include "list-objects.h"
13
14 #include <expat.h>
15
16 static const char http_push_usage[] =
17 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
18
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21 XML_STATUS_OK = 1,
22 XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK 1
25 #define XML_STATUS_ERROR 0
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
39
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
44
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
55
56 /* DAV request body templates */
57 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
60
61 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
63
64 /* bits #0-15 in revision.h */
65
66 #define LOCAL (1u<<16)
67 #define REMOTE (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING (1u<<19)
70
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
73
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
77
78 static struct curl_slist *no_pragma_header;
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 char *path;
91 int path_len;
92 int has_info_refs;
93 int can_update_info_refs;
94 int has_info_packs;
95 struct packed_git *packs;
96 struct remote_lock *locks;
97 };
98
99 static struct repo *remote;
100
101 enum transfer_state {
102 NEED_FETCH,
103 RUN_FETCH_LOOSE,
104 RUN_FETCH_PACKED,
105 NEED_PUSH,
106 RUN_MKCOL,
107 RUN_PUT,
108 RUN_MOVE,
109 ABORTED,
110 COMPLETE,
111 };
112
113 struct transfer_request
114 {
115 struct object *obj;
116 char *url;
117 char *dest;
118 struct remote_lock *lock;
119 struct curl_slist *headers;
120 struct buffer buffer;
121 char filename[PATH_MAX];
122 char tmpfile[PATH_MAX];
123 int local_fileno;
124 FILE *local_stream;
125 enum transfer_state state;
126 CURLcode curl_result;
127 char errorstr[CURL_ERROR_SIZE];
128 long http_code;
129 unsigned char real_sha1[20];
130 git_SHA_CTX c;
131 z_stream stream;
132 int zret;
133 int rename;
134 void *userData;
135 struct active_request_slot *slot;
136 struct transfer_request *next;
137 };
138
139 static struct transfer_request *request_queue_head;
140
141 struct xml_ctx
142 {
143 char *name;
144 int len;
145 char *cdata;
146 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
147 void *userData;
148 };
149
150 struct remote_lock
151 {
152 char *url;
153 char *owner;
154 char *token;
155 time_t start_time;
156 long timeout;
157 int refreshing;
158 struct remote_lock *next;
159 };
160
161 /* Flags that control remote_ls processing */
162 #define PROCESS_FILES (1u << 0)
163 #define PROCESS_DIRS (1u << 1)
164 #define RECURSIVE (1u << 2)
165
166 /* Flags that remote_ls passes to callback functions */
167 #define IS_DIR (1u << 0)
168
169 struct remote_ls_ctx
170 {
171 char *path;
172 void (*userFunc)(struct remote_ls_ctx *ls);
173 void *userData;
174 int flags;
175 char *dentry_name;
176 int dentry_flags;
177 struct remote_ls_ctx *parent;
178 };
179
180 static void finish_request(struct transfer_request *request);
181 static void release_request(struct transfer_request *request);
182
183 static void process_response(void *callback_data)
184 {
185 struct transfer_request *request =
186 (struct transfer_request *)callback_data;
187
188 finish_request(request);
189 }
190
191 #ifdef USE_CURL_MULTI
192 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
193 void *data)
194 {
195 unsigned char expn[4096];
196 size_t size = eltsize * nmemb;
197 int posn = 0;
198 struct transfer_request *request = (struct transfer_request *)data;
199 do {
200 ssize_t retval = xwrite(request->local_fileno,
201 (char *) ptr + posn, size - posn);
202 if (retval < 0)
203 return posn;
204 posn += retval;
205 } while (posn < size);
206
207 request->stream.avail_in = size;
208 request->stream.next_in = ptr;
209 do {
210 request->stream.next_out = expn;
211 request->stream.avail_out = sizeof(expn);
212 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
213 git_SHA1_Update(&request->c, expn,
214 sizeof(expn) - request->stream.avail_out);
215 } while (request->stream.avail_in && request->zret == Z_OK);
216 data_received++;
217 return size;
218 }
219
220 static void start_fetch_loose(struct transfer_request *request)
221 {
222 char *hex = sha1_to_hex(request->obj->sha1);
223 char *filename;
224 char prevfile[PATH_MAX];
225 char *url;
226 char *posn;
227 int prevlocal;
228 unsigned char prev_buf[PREV_BUF_SIZE];
229 ssize_t prev_read = 0;
230 long prev_posn = 0;
231 char range[RANGE_HEADER_SIZE];
232 struct curl_slist *range_header = NULL;
233 struct active_request_slot *slot;
234
235 filename = sha1_file_name(request->obj->sha1);
236 snprintf(request->filename, sizeof(request->filename), "%s", filename);
237 snprintf(request->tmpfile, sizeof(request->tmpfile),
238 "%s.temp", filename);
239
240 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
241 unlink(prevfile);
242 rename(request->tmpfile, prevfile);
243 unlink(request->tmpfile);
244
245 if (request->local_fileno != -1)
246 error("fd leakage in start: %d", request->local_fileno);
247 request->local_fileno = open(request->tmpfile,
248 O_WRONLY | O_CREAT | O_EXCL, 0666);
249 /* This could have failed due to the "lazy directory creation";
250 * try to mkdir the last path component.
251 */
252 if (request->local_fileno < 0 && errno == ENOENT) {
253 char *dir = strrchr(request->tmpfile, '/');
254 if (dir) {
255 *dir = 0;
256 mkdir(request->tmpfile, 0777);
257 *dir = '/';
258 }
259 request->local_fileno = open(request->tmpfile,
260 O_WRONLY | O_CREAT | O_EXCL, 0666);
261 }
262
263 if (request->local_fileno < 0) {
264 request->state = ABORTED;
265 error("Couldn't create temporary file %s for %s: %s",
266 request->tmpfile, request->filename, strerror(errno));
267 return;
268 }
269
270 memset(&request->stream, 0, sizeof(request->stream));
271
272 git_inflate_init(&request->stream);
273
274 git_SHA1_Init(&request->c);
275
276 url = xmalloc(strlen(remote->url) + 50);
277 request->url = xmalloc(strlen(remote->url) + 50);
278 strcpy(url, remote->url);
279 posn = url + strlen(remote->url);
280 strcpy(posn, "objects/");
281 posn += 8;
282 memcpy(posn, hex, 2);
283 posn += 2;
284 *(posn++) = '/';
285 strcpy(posn, hex + 2);
286 strcpy(request->url, url);
287
288 /* If a previous temp file is present, process what was already
289 fetched. */
290 prevlocal = open(prevfile, O_RDONLY);
291 if (prevlocal != -1) {
292 do {
293 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
294 if (prev_read>0) {
295 if (fwrite_sha1_file(prev_buf,
296 1,
297 prev_read,
298 request) == prev_read) {
299 prev_posn += prev_read;
300 } else {
301 prev_read = -1;
302 }
303 }
304 } while (prev_read > 0);
305 close(prevlocal);
306 }
307 unlink(prevfile);
308
309 /* Reset inflate/SHA1 if there was an error reading the previous temp
310 file; also rewind to the beginning of the local file. */
311 if (prev_read == -1) {
312 memset(&request->stream, 0, sizeof(request->stream));
313 git_inflate_init(&request->stream);
314 git_SHA1_Init(&request->c);
315 if (prev_posn>0) {
316 prev_posn = 0;
317 lseek(request->local_fileno, 0, SEEK_SET);
318 ftruncate(request->local_fileno, 0);
319 }
320 }
321
322 slot = get_active_slot();
323 slot->callback_func = process_response;
324 slot->callback_data = request;
325 request->slot = slot;
326
327 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
328 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
329 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
330 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
331 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
332
333 /* If we have successfully processed data from a previous fetch
334 attempt, only fetch the data we don't already have. */
335 if (prev_posn>0) {
336 if (push_verbosely)
337 fprintf(stderr,
338 "Resuming fetch of object %s at byte %ld\n",
339 hex, prev_posn);
340 sprintf(range, "Range: bytes=%ld-", prev_posn);
341 range_header = curl_slist_append(range_header, range);
342 curl_easy_setopt(slot->curl,
343 CURLOPT_HTTPHEADER, range_header);
344 }
345
346 /* Try to get the request started, abort the request on error */
347 request->state = RUN_FETCH_LOOSE;
348 if (!start_active_slot(slot)) {
349 fprintf(stderr, "Unable to start GET request\n");
350 remote->can_update_info_refs = 0;
351 release_request(request);
352 }
353 }
354
355 static void start_mkcol(struct transfer_request *request)
356 {
357 char *hex = sha1_to_hex(request->obj->sha1);
358 struct active_request_slot *slot;
359 char *posn;
360
361 request->url = xmalloc(strlen(remote->url) + 13);
362 strcpy(request->url, remote->url);
363 posn = request->url + strlen(remote->url);
364 strcpy(posn, "objects/");
365 posn += 8;
366 memcpy(posn, hex, 2);
367 posn += 2;
368 strcpy(posn, "/");
369
370 slot = get_active_slot();
371 slot->callback_func = process_response;
372 slot->callback_data = request;
373 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
374 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
375 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
376 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
377 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
378
379 if (start_active_slot(slot)) {
380 request->slot = slot;
381 request->state = RUN_MKCOL;
382 } else {
383 request->state = ABORTED;
384 free(request->url);
385 request->url = NULL;
386 }
387 }
388 #endif
389
390 static void start_fetch_packed(struct transfer_request *request)
391 {
392 char *url;
393 struct packed_git *target;
394 FILE *packfile;
395 char *filename;
396 long prev_posn = 0;
397 char range[RANGE_HEADER_SIZE];
398 struct curl_slist *range_header = NULL;
399
400 struct transfer_request *check_request = request_queue_head;
401 struct active_request_slot *slot;
402
403 target = find_sha1_pack(request->obj->sha1, remote->packs);
404 if (!target) {
405 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
406 remote->can_update_info_refs = 0;
407 release_request(request);
408 return;
409 }
410
411 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
412 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
413
414 filename = sha1_pack_name(target->sha1);
415 snprintf(request->filename, sizeof(request->filename), "%s", filename);
416 snprintf(request->tmpfile, sizeof(request->tmpfile),
417 "%s.temp", filename);
418
419 url = xmalloc(strlen(remote->url) + 64);
420 sprintf(url, "%sobjects/pack/pack-%s.pack",
421 remote->url, sha1_to_hex(target->sha1));
422
423 /* Make sure there isn't another open request for this pack */
424 while (check_request) {
425 if (check_request->state == RUN_FETCH_PACKED &&
426 !strcmp(check_request->url, url)) {
427 free(url);
428 release_request(request);
429 return;
430 }
431 check_request = check_request->next;
432 }
433
434 packfile = fopen(request->tmpfile, "a");
435 if (!packfile) {
436 fprintf(stderr, "Unable to open local file %s for pack",
437 request->tmpfile);
438 remote->can_update_info_refs = 0;
439 free(url);
440 return;
441 }
442
443 slot = get_active_slot();
444 slot->callback_func = process_response;
445 slot->callback_data = request;
446 request->slot = slot;
447 request->local_stream = packfile;
448 request->userData = target;
449
450 request->url = url;
451 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
452 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
453 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
454 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
455 slot->local = packfile;
456
457 /* If there is data present from a previous transfer attempt,
458 resume where it left off */
459 prev_posn = ftell(packfile);
460 if (prev_posn>0) {
461 if (push_verbosely)
462 fprintf(stderr,
463 "Resuming fetch of pack %s at byte %ld\n",
464 sha1_to_hex(target->sha1), prev_posn);
465 sprintf(range, "Range: bytes=%ld-", prev_posn);
466 range_header = curl_slist_append(range_header, range);
467 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
468 }
469
470 /* Try to get the request started, abort the request on error */
471 request->state = RUN_FETCH_PACKED;
472 if (!start_active_slot(slot)) {
473 fprintf(stderr, "Unable to start GET request\n");
474 remote->can_update_info_refs = 0;
475 release_request(request);
476 }
477 }
478
479 static void start_put(struct transfer_request *request)
480 {
481 char *hex = sha1_to_hex(request->obj->sha1);
482 struct active_request_slot *slot;
483 char *posn;
484 enum object_type type;
485 char hdr[50];
486 void *unpacked;
487 unsigned long len;
488 int hdrlen;
489 ssize_t size;
490 z_stream stream;
491
492 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
493 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
494
495 /* Set it up */
496 memset(&stream, 0, sizeof(stream));
497 deflateInit(&stream, zlib_compression_level);
498 size = deflateBound(&stream, len + hdrlen);
499 strbuf_init(&request->buffer.buf, size);
500 request->buffer.posn = 0;
501
502 /* Compress it */
503 stream.next_out = (unsigned char *)request->buffer.buf.buf;
504 stream.avail_out = size;
505
506 /* First header.. */
507 stream.next_in = (void *)hdr;
508 stream.avail_in = hdrlen;
509 while (deflate(&stream, 0) == Z_OK)
510 /* nothing */;
511
512 /* Then the data itself.. */
513 stream.next_in = unpacked;
514 stream.avail_in = len;
515 while (deflate(&stream, Z_FINISH) == Z_OK)
516 /* nothing */;
517 deflateEnd(&stream);
518 free(unpacked);
519
520 request->buffer.buf.len = stream.total_out;
521
522 request->url = xmalloc(strlen(remote->url) +
523 strlen(request->lock->token) + 51);
524 strcpy(request->url, remote->url);
525 posn = request->url + strlen(remote->url);
526 strcpy(posn, "objects/");
527 posn += 8;
528 memcpy(posn, hex, 2);
529 posn += 2;
530 *(posn++) = '/';
531 strcpy(posn, hex + 2);
532 request->dest = xmalloc(strlen(request->url) + 14);
533 sprintf(request->dest, "Destination: %s", request->url);
534 posn += 38;
535 *(posn++) = '_';
536 strcpy(posn, request->lock->token);
537
538 slot = get_active_slot();
539 slot->callback_func = process_response;
540 slot->callback_data = request;
541 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
543 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
544 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
545 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
546 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
547 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
548 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
549 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
550
551 if (start_active_slot(slot)) {
552 request->slot = slot;
553 request->state = RUN_PUT;
554 } else {
555 request->state = ABORTED;
556 free(request->url);
557 request->url = NULL;
558 }
559 }
560
561 static void start_move(struct transfer_request *request)
562 {
563 struct active_request_slot *slot;
564 struct curl_slist *dav_headers = NULL;
565
566 slot = get_active_slot();
567 slot->callback_func = process_response;
568 slot->callback_data = request;
569 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
570 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
571 dav_headers = curl_slist_append(dav_headers, request->dest);
572 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
573 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
574 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
575 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
576
577 if (start_active_slot(slot)) {
578 request->slot = slot;
579 request->state = RUN_MOVE;
580 } else {
581 request->state = ABORTED;
582 free(request->url);
583 request->url = NULL;
584 }
585 }
586
587 static int refresh_lock(struct remote_lock *lock)
588 {
589 struct active_request_slot *slot;
590 struct slot_results results;
591 char *if_header;
592 char timeout_header[25];
593 struct curl_slist *dav_headers = NULL;
594 int rc = 0;
595
596 lock->refreshing = 1;
597
598 if_header = xmalloc(strlen(lock->token) + 25);
599 sprintf(if_header, "If: (<%s>)", lock->token);
600 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
601 dav_headers = curl_slist_append(dav_headers, if_header);
602 dav_headers = curl_slist_append(dav_headers, timeout_header);
603
604 slot = get_active_slot();
605 slot->results = &results;
606 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
607 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
608 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
609 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
610 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
611
612 if (start_active_slot(slot)) {
613 run_active_slot(slot);
614 if (results.curl_result != CURLE_OK) {
615 fprintf(stderr, "LOCK HTTP error %ld\n",
616 results.http_code);
617 } else {
618 lock->start_time = time(NULL);
619 rc = 1;
620 }
621 }
622
623 lock->refreshing = 0;
624 curl_slist_free_all(dav_headers);
625 free(if_header);
626
627 return rc;
628 }
629
630 static void check_locks(void)
631 {
632 struct remote_lock *lock = remote->locks;
633 time_t current_time = time(NULL);
634 int time_remaining;
635
636 while (lock) {
637 time_remaining = lock->start_time + lock->timeout -
638 current_time;
639 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
640 if (!refresh_lock(lock)) {
641 fprintf(stderr,
642 "Unable to refresh lock for %s\n",
643 lock->url);
644 aborted = 1;
645 return;
646 }
647 }
648 lock = lock->next;
649 }
650 }
651
652 static void release_request(struct transfer_request *request)
653 {
654 struct transfer_request *entry = request_queue_head;
655
656 if (request == request_queue_head) {
657 request_queue_head = request->next;
658 } else {
659 while (entry->next != NULL && entry->next != request)
660 entry = entry->next;
661 if (entry->next == request)
662 entry->next = entry->next->next;
663 }
664
665 if (request->local_fileno != -1)
666 close(request->local_fileno);
667 if (request->local_stream)
668 fclose(request->local_stream);
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 git_inflate_end(&request->stream);
746 git_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))
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 static int fill_active_slot(void *unused)
799 {
800 struct transfer_request *request = request_queue_head;
801
802 if (aborted)
803 return 0;
804
805 for (request = request_queue_head; request; request = request->next) {
806 if (request->state == NEED_FETCH) {
807 start_fetch_loose(request);
808 return 1;
809 } else if (pushing && request->state == NEED_PUSH) {
810 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
811 start_put(request);
812 } else {
813 start_mkcol(request);
814 }
815 return 1;
816 }
817 }
818 return 0;
819 }
820 #endif
821
822 static void get_remote_object_list(unsigned char parent);
823
824 static void add_fetch_request(struct object *obj)
825 {
826 struct transfer_request *request;
827
828 check_locks();
829
830 /*
831 * Don't fetch the object if it's known to exist locally
832 * or is already in the request queue
833 */
834 if (remote_dir_exists[obj->sha1[0]] == -1)
835 get_remote_object_list(obj->sha1[0]);
836 if (obj->flags & (LOCAL | FETCHING))
837 return;
838
839 obj->flags |= FETCHING;
840 request = xmalloc(sizeof(*request));
841 request->obj = obj;
842 request->url = NULL;
843 request->lock = NULL;
844 request->headers = NULL;
845 request->local_fileno = -1;
846 request->local_stream = NULL;
847 request->state = NEED_FETCH;
848 request->next = request_queue_head;
849 request_queue_head = request;
850
851 #ifdef USE_CURL_MULTI
852 fill_active_slots();
853 step_active_slots();
854 #endif
855 }
856
857 static int add_send_request(struct object *obj, struct remote_lock *lock)
858 {
859 struct transfer_request *request = request_queue_head;
860 struct packed_git *target;
861
862 /* Keep locks active */
863 check_locks();
864
865 /*
866 * Don't push the object if it's known to exist on the remote
867 * or is already in the request queue
868 */
869 if (remote_dir_exists[obj->sha1[0]] == -1)
870 get_remote_object_list(obj->sha1[0]);
871 if (obj->flags & (REMOTE | PUSHING))
872 return 0;
873 target = find_sha1_pack(obj->sha1, remote->packs);
874 if (target) {
875 obj->flags |= REMOTE;
876 return 0;
877 }
878
879 obj->flags |= PUSHING;
880 request = xmalloc(sizeof(*request));
881 request->obj = obj;
882 request->url = NULL;
883 request->lock = lock;
884 request->headers = NULL;
885 request->local_fileno = -1;
886 request->local_stream = NULL;
887 request->state = NEED_PUSH;
888 request->next = request_queue_head;
889 request_queue_head = request;
890
891 #ifdef USE_CURL_MULTI
892 fill_active_slots();
893 step_active_slots();
894 #endif
895
896 return 1;
897 }
898
899 static int fetch_index(unsigned char *sha1)
900 {
901 char *hex = sha1_to_hex(sha1);
902 char *filename;
903 char *url;
904 char tmpfile[PATH_MAX];
905 long prev_posn = 0;
906 char range[RANGE_HEADER_SIZE];
907 struct curl_slist *range_header = NULL;
908
909 FILE *indexfile;
910 struct active_request_slot *slot;
911 struct slot_results results;
912
913 /* Don't use the index if the pack isn't there */
914 url = xmalloc(strlen(remote->url) + 64);
915 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
916 slot = get_active_slot();
917 slot->results = &results;
918 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
919 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
920 if (start_active_slot(slot)) {
921 run_active_slot(slot);
922 if (results.curl_result != CURLE_OK) {
923 free(url);
924 return error("Unable to verify pack %s is available",
925 hex);
926 }
927 } else {
928 free(url);
929 return error("Unable to start request");
930 }
931
932 if (has_pack_index(sha1)) {
933 free(url);
934 return 0;
935 }
936
937 if (push_verbosely)
938 fprintf(stderr, "Getting index for pack %s\n", hex);
939
940 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
941
942 filename = sha1_pack_index_name(sha1);
943 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
944 indexfile = fopen(tmpfile, "a");
945 if (!indexfile) {
946 free(url);
947 return error("Unable to open local file %s for pack index",
948 tmpfile);
949 }
950
951 slot = get_active_slot();
952 slot->results = &results;
953 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
954 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
955 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
956 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
957 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
958 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
959 slot->local = indexfile;
960
961 /* If there is data present from a previous transfer attempt,
962 resume where it left off */
963 prev_posn = ftell(indexfile);
964 if (prev_posn>0) {
965 if (push_verbosely)
966 fprintf(stderr,
967 "Resuming fetch of index for pack %s at byte %ld\n",
968 hex, prev_posn);
969 sprintf(range, "Range: bytes=%ld-", prev_posn);
970 range_header = curl_slist_append(range_header, range);
971 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
972 }
973
974 if (start_active_slot(slot)) {
975 run_active_slot(slot);
976 if (results.curl_result != CURLE_OK) {
977 free(url);
978 fclose(indexfile);
979 return error("Unable to get pack index %s\n%s", url,
980 curl_errorstr);
981 }
982 } else {
983 free(url);
984 fclose(indexfile);
985 return error("Unable to start request");
986 }
987
988 free(url);
989 fclose(indexfile);
990
991 return move_temp_to_file(tmpfile, filename);
992 }
993
994 static int setup_index(unsigned char *sha1)
995 {
996 struct packed_git *new_pack;
997
998 if (fetch_index(sha1))
999 return -1;
1000
1001 new_pack = parse_pack_index(sha1);
1002 new_pack->next = remote->packs;
1003 remote->packs = new_pack;
1004 return 0;
1005 }
1006
1007 static int fetch_indices(void)
1008 {
1009 unsigned char sha1[20];
1010 char *url;
1011 struct strbuf buffer = STRBUF_INIT;
1012 char *data;
1013 int i = 0;
1014
1015 struct active_request_slot *slot;
1016 struct slot_results results;
1017
1018 if (push_verbosely)
1019 fprintf(stderr, "Getting pack list\n");
1020
1021 url = xmalloc(strlen(remote->url) + 20);
1022 sprintf(url, "%sobjects/info/packs", remote->url);
1023
1024 slot = get_active_slot();
1025 slot->results = &results;
1026 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1028 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1029 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1030 if (start_active_slot(slot)) {
1031 run_active_slot(slot);
1032 if (results.curl_result != CURLE_OK) {
1033 strbuf_release(&buffer);
1034 free(url);
1035 if (results.http_code == 404)
1036 return 0;
1037 else
1038 return error("%s", curl_errorstr);
1039 }
1040 } else {
1041 strbuf_release(&buffer);
1042 free(url);
1043 return error("Unable to start request");
1044 }
1045 free(url);
1046
1047 data = buffer.buf;
1048 while (i < buffer.len) {
1049 switch (data[i]) {
1050 case 'P':
1051 i++;
1052 if (i + 52 < buffer.len &&
1053 !prefixcmp(data + i, " pack-") &&
1054 !prefixcmp(data + i + 46, ".pack\n")) {
1055 get_sha1_hex(data + i + 6, sha1);
1056 setup_index(sha1);
1057 i += 51;
1058 break;
1059 }
1060 default:
1061 while (data[i] != '\n')
1062 i++;
1063 }
1064 i++;
1065 }
1066
1067 strbuf_release(&buffer);
1068 return 0;
1069 }
1070
1071 static void one_remote_object(const char *hex)
1072 {
1073 unsigned char sha1[20];
1074 struct object *obj;
1075
1076 if (get_sha1_hex(hex, sha1) != 0)
1077 return;
1078
1079 obj = lookup_object(sha1);
1080 if (!obj)
1081 obj = parse_object(sha1);
1082
1083 /* Ignore remote objects that don't exist locally */
1084 if (!obj)
1085 return;
1086
1087 obj->flags |= REMOTE;
1088 if (!object_list_contains(objects, obj))
1089 object_list_insert(obj, &objects);
1090 }
1091
1092 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1093 {
1094 int *lock_flags = (int *)ctx->userData;
1095
1096 if (tag_closed) {
1097 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1098 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1099 (*lock_flags & DAV_PROP_LOCKWR)) {
1100 *lock_flags |= DAV_LOCK_OK;
1101 }
1102 *lock_flags &= DAV_LOCK_OK;
1103 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1104 *lock_flags |= DAV_PROP_LOCKWR;
1105 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1106 *lock_flags |= DAV_PROP_LOCKEX;
1107 }
1108 }
1109 }
1110
1111 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1112 {
1113 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1114
1115 if (tag_closed && ctx->cdata) {
1116 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1117 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1118 strcpy(lock->owner, ctx->cdata);
1119 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1120 if (!prefixcmp(ctx->cdata, "Second-"))
1121 lock->timeout =
1122 strtol(ctx->cdata + 7, NULL, 10);
1123 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1124 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1125 strcpy(lock->token, ctx->cdata);
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 char saved_character = ep[1];
1205 ep[1] = '\0';
1206 slot = get_active_slot();
1207 slot->results = &results;
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1209 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1210 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1211 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1212 if (start_active_slot(slot)) {
1213 run_active_slot(slot);
1214 if (results.curl_result != CURLE_OK &&
1215 results.http_code != 405) {
1216 fprintf(stderr,
1217 "Unable to create branch path %s\n",
1218 url);
1219 free(url);
1220 return NULL;
1221 }
1222 } else {
1223 fprintf(stderr, "Unable to start MKCOL request\n");
1224 free(url);
1225 return NULL;
1226 }
1227 ep[1] = saved_character;
1228 ep = strchr(ep + 1, '/');
1229 }
1230
1231 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232
1233 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1234 dav_headers = curl_slist_append(dav_headers, timeout_header);
1235 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1240 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1241 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1244 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1245 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1246 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1247 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248
1249 lock = xcalloc(1, sizeof(*lock));
1250 lock->timeout = -1;
1251
1252 if (start_active_slot(slot)) {
1253 run_active_slot(slot);
1254 if (results.curl_result == CURLE_OK) {
1255 XML_Parser parser = XML_ParserCreate(NULL);
1256 enum XML_Status result;
1257 ctx.name = xcalloc(10, 1);
1258 ctx.len = 0;
1259 ctx.cdata = NULL;
1260 ctx.userFunc = handle_new_lock_ctx;
1261 ctx.userData = lock;
1262 XML_SetUserData(parser, &ctx);
1263 XML_SetElementHandler(parser, xml_start_tag,
1264 xml_end_tag);
1265 XML_SetCharacterDataHandler(parser, xml_cdata);
1266 result = XML_Parse(parser, in_buffer.buf,
1267 in_buffer.len, 1);
1268 free(ctx.name);
1269 if (result != XML_STATUS_OK) {
1270 fprintf(stderr, "XML error: %s\n",
1271 XML_ErrorString(
1272 XML_GetErrorCode(parser)));
1273 lock->timeout = -1;
1274 }
1275 XML_ParserFree(parser);
1276 }
1277 } else {
1278 fprintf(stderr, "Unable to start LOCK request\n");
1279 }
1280
1281 curl_slist_free_all(dav_headers);
1282 strbuf_release(&out_buffer.buf);
1283 strbuf_release(&in_buffer);
1284
1285 if (lock->token == NULL || lock->timeout <= 0) {
1286 free(lock->token);
1287 free(lock->owner);
1288 free(url);
1289 free(lock);
1290 lock = NULL;
1291 } else {
1292 lock->url = url;
1293 lock->start_time = time(NULL);
1294 lock->next = remote->locks;
1295 remote->locks = lock;
1296 }
1297
1298 return lock;
1299 }
1300
1301 static int unlock_remote(struct remote_lock *lock)
1302 {
1303 struct active_request_slot *slot;
1304 struct slot_results results;
1305 struct remote_lock *prev = remote->locks;
1306 char *lock_token_header;
1307 struct curl_slist *dav_headers = NULL;
1308 int rc = 0;
1309
1310 lock_token_header = xmalloc(strlen(lock->token) + 31);
1311 sprintf(lock_token_header, "Lock-Token: <%s>",
1312 lock->token);
1313 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1314
1315 slot = get_active_slot();
1316 slot->results = &results;
1317 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1318 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1319 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1320 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1321
1322 if (start_active_slot(slot)) {
1323 run_active_slot(slot);
1324 if (results.curl_result == CURLE_OK)
1325 rc = 1;
1326 else
1327 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1328 results.http_code);
1329 } else {
1330 fprintf(stderr, "Unable to start UNLOCK request\n");
1331 }
1332
1333 curl_slist_free_all(dav_headers);
1334 free(lock_token_header);
1335
1336 if (remote->locks == lock) {
1337 remote->locks = lock->next;
1338 } else {
1339 while (prev && prev->next != lock)
1340 prev = prev->next;
1341 if (prev)
1342 prev->next = prev->next->next;
1343 }
1344
1345 free(lock->owner);
1346 free(lock->url);
1347 free(lock->token);
1348 free(lock);
1349
1350 return rc;
1351 }
1352
1353 static void remove_locks(void)
1354 {
1355 struct remote_lock *lock = remote->locks;
1356
1357 fprintf(stderr, "Removing remote locks...\n");
1358 while (lock) {
1359 unlock_remote(lock);
1360 lock = lock->next;
1361 }
1362 }
1363
1364 static void remove_locks_on_signal(int signo)
1365 {
1366 remove_locks();
1367 signal(signo, SIG_DFL);
1368 raise(signo);
1369 }
1370
1371 static void remote_ls(const char *path, int flags,
1372 void (*userFunc)(struct remote_ls_ctx *ls),
1373 void *userData);
1374
1375 static void process_ls_object(struct remote_ls_ctx *ls)
1376 {
1377 unsigned int *parent = (unsigned int *)ls->userData;
1378 char *path = ls->dentry_name;
1379 char *obj_hex;
1380
1381 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1382 remote_dir_exists[*parent] = 1;
1383 return;
1384 }
1385
1386 if (strlen(path) != 49)
1387 return;
1388 path += 8;
1389 obj_hex = xmalloc(strlen(path));
1390 /* NB: path is not null-terminated, can not use strlcpy here */
1391 memcpy(obj_hex, path, 2);
1392 strcpy(obj_hex + 2, path + 3);
1393 one_remote_object(obj_hex);
1394 free(obj_hex);
1395 }
1396
1397 static void process_ls_ref(struct remote_ls_ctx *ls)
1398 {
1399 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1400 fprintf(stderr, " %s\n", ls->dentry_name);
1401 return;
1402 }
1403
1404 if (!(ls->dentry_flags & IS_DIR))
1405 one_remote_ref(ls->dentry_name);
1406 }
1407
1408 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1409 {
1410 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1411
1412 if (tag_closed) {
1413 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1414 if (ls->dentry_flags & IS_DIR) {
1415 if (ls->flags & PROCESS_DIRS) {
1416 ls->userFunc(ls);
1417 }
1418 if (strcmp(ls->dentry_name, ls->path) &&
1419 ls->flags & RECURSIVE) {
1420 remote_ls(ls->dentry_name,
1421 ls->flags,
1422 ls->userFunc,
1423 ls->userData);
1424 }
1425 } else if (ls->flags & PROCESS_FILES) {
1426 ls->userFunc(ls);
1427 }
1428 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1429 char *path = ctx->cdata;
1430 if (*ctx->cdata == 'h') {
1431 path = strstr(path, "//");
1432 if (path) {
1433 path = strchr(path+2, '/');
1434 }
1435 }
1436 if (path) {
1437 path += remote->path_len;
1438 ls->dentry_name = xstrdup(path);
1439 }
1440 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1441 ls->dentry_flags |= IS_DIR;
1442 }
1443 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1444 free(ls->dentry_name);
1445 ls->dentry_name = NULL;
1446 ls->dentry_flags = 0;
1447 }
1448 }
1449
1450 /*
1451 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1452 * should _only_ heed the information from that file, instead of trying to
1453 * determine the refs from the remote file system (badly: it does not even
1454 * know about packed-refs).
1455 */
1456 static void remote_ls(const char *path, int flags,
1457 void (*userFunc)(struct remote_ls_ctx *ls),
1458 void *userData)
1459 {
1460 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1461 struct active_request_slot *slot;
1462 struct slot_results results;
1463 struct strbuf in_buffer = STRBUF_INIT;
1464 struct buffer out_buffer = { STRBUF_INIT, 0 };
1465 struct curl_slist *dav_headers = NULL;
1466 struct xml_ctx ctx;
1467 struct remote_ls_ctx ls;
1468
1469 ls.flags = flags;
1470 ls.path = xstrdup(path);
1471 ls.dentry_name = NULL;
1472 ls.dentry_flags = 0;
1473 ls.userData = userData;
1474 ls.userFunc = userFunc;
1475
1476 sprintf(url, "%s%s", remote->url, path);
1477
1478 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1479
1480 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1481 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1482
1483 slot = get_active_slot();
1484 slot->results = &results;
1485 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1486 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1487 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1488 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1489 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1490 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1491 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1492 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1493 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1494
1495 if (start_active_slot(slot)) {
1496 run_active_slot(slot);
1497 if (results.curl_result == CURLE_OK) {
1498 XML_Parser parser = XML_ParserCreate(NULL);
1499 enum XML_Status result;
1500 ctx.name = xcalloc(10, 1);
1501 ctx.len = 0;
1502 ctx.cdata = NULL;
1503 ctx.userFunc = handle_remote_ls_ctx;
1504 ctx.userData = &ls;
1505 XML_SetUserData(parser, &ctx);
1506 XML_SetElementHandler(parser, xml_start_tag,
1507 xml_end_tag);
1508 XML_SetCharacterDataHandler(parser, xml_cdata);
1509 result = XML_Parse(parser, in_buffer.buf,
1510 in_buffer.len, 1);
1511 free(ctx.name);
1512
1513 if (result != XML_STATUS_OK) {
1514 fprintf(stderr, "XML error: %s\n",
1515 XML_ErrorString(
1516 XML_GetErrorCode(parser)));
1517 }
1518 XML_ParserFree(parser);
1519 }
1520 } else {
1521 fprintf(stderr, "Unable to start PROPFIND request\n");
1522 }
1523
1524 free(ls.path);
1525 free(url);
1526 strbuf_release(&out_buffer.buf);
1527 strbuf_release(&in_buffer);
1528 curl_slist_free_all(dav_headers);
1529 }
1530
1531 static void get_remote_object_list(unsigned char parent)
1532 {
1533 char path[] = "objects/XX/";
1534 static const char hex[] = "0123456789abcdef";
1535 unsigned int val = parent;
1536
1537 path[8] = hex[val >> 4];
1538 path[9] = hex[val & 0xf];
1539 remote_dir_exists[val] = 0;
1540 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1541 process_ls_object, &val);
1542 }
1543
1544 static int locking_available(void)
1545 {
1546 struct active_request_slot *slot;
1547 struct slot_results results;
1548 struct strbuf in_buffer = STRBUF_INIT;
1549 struct buffer out_buffer = { STRBUF_INIT, 0 };
1550 struct curl_slist *dav_headers = NULL;
1551 struct xml_ctx ctx;
1552 int lock_flags = 0;
1553
1554 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1555
1556 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1557 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1558
1559 slot = get_active_slot();
1560 slot->results = &results;
1561 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1562 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1563 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1564 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1565 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1566 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1567 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1569 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1570
1571 if (start_active_slot(slot)) {
1572 run_active_slot(slot);
1573 if (results.curl_result == CURLE_OK) {
1574 XML_Parser parser = XML_ParserCreate(NULL);
1575 enum XML_Status result;
1576 ctx.name = xcalloc(10, 1);
1577 ctx.len = 0;
1578 ctx.cdata = NULL;
1579 ctx.userFunc = handle_lockprop_ctx;
1580 ctx.userData = &lock_flags;
1581 XML_SetUserData(parser, &ctx);
1582 XML_SetElementHandler(parser, xml_start_tag,
1583 xml_end_tag);
1584 result = XML_Parse(parser, in_buffer.buf,
1585 in_buffer.len, 1);
1586 free(ctx.name);
1587
1588 if (result != XML_STATUS_OK) {
1589 fprintf(stderr, "XML error: %s\n",
1590 XML_ErrorString(
1591 XML_GetErrorCode(parser)));
1592 lock_flags = 0;
1593 }
1594 XML_ParserFree(parser);
1595 if (!lock_flags)
1596 error("Error: no DAV locking support on %s",
1597 remote->url);
1598
1599 } else {
1600 error("Cannot access URL %s, return code %d",
1601 remote->url, results.curl_result);
1602 lock_flags = 0;
1603 }
1604 } else {
1605 error("Unable to start PROPFIND request on %s", remote->url);
1606 }
1607
1608 strbuf_release(&out_buffer.buf);
1609 strbuf_release(&in_buffer);
1610 curl_slist_free_all(dav_headers);
1611
1612 return lock_flags;
1613 }
1614
1615 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1616 {
1617 struct object_list *entry = xmalloc(sizeof(struct object_list));
1618 entry->item = obj;
1619 entry->next = *p;
1620 *p = entry;
1621 return &entry->next;
1622 }
1623
1624 static struct object_list **process_blob(struct blob *blob,
1625 struct object_list **p,
1626 struct name_path *path,
1627 const char *name)
1628 {
1629 struct object *obj = &blob->object;
1630
1631 obj->flags |= LOCAL;
1632
1633 if (obj->flags & (UNINTERESTING | SEEN))
1634 return p;
1635
1636 obj->flags |= SEEN;
1637 return add_one_object(obj, p);
1638 }
1639
1640 static struct object_list **process_tree(struct tree *tree,
1641 struct object_list **p,
1642 struct name_path *path,
1643 const char *name)
1644 {
1645 struct object *obj = &tree->object;
1646 struct tree_desc desc;
1647 struct name_entry entry;
1648 struct name_path me;
1649
1650 obj->flags |= LOCAL;
1651
1652 if (obj->flags & (UNINTERESTING | SEEN))
1653 return p;
1654 if (parse_tree(tree) < 0)
1655 die("bad tree object %s", sha1_to_hex(obj->sha1));
1656
1657 obj->flags |= SEEN;
1658 name = xstrdup(name);
1659 p = add_one_object(obj, p);
1660 me.up = path;
1661 me.elem = name;
1662 me.elem_len = strlen(name);
1663
1664 init_tree_desc(&desc, tree->buffer, tree->size);
1665
1666 while (tree_entry(&desc, &entry))
1667 switch (object_type(entry.mode)) {
1668 case OBJ_TREE:
1669 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1670 break;
1671 case OBJ_BLOB:
1672 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1673 break;
1674 default:
1675 /* Subproject commit - not in this repository */
1676 break;
1677 }
1678
1679 free(tree->buffer);
1680 tree->buffer = NULL;
1681 return p;
1682 }
1683
1684 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1685 {
1686 int i;
1687 struct commit *commit;
1688 struct object_list **p = &objects;
1689 int count = 0;
1690
1691 while ((commit = get_revision(revs)) != NULL) {
1692 p = process_tree(commit->tree, p, NULL, "");
1693 commit->object.flags |= LOCAL;
1694 if (!(commit->object.flags & UNINTERESTING))
1695 count += add_send_request(&commit->object, lock);
1696 }
1697
1698 for (i = 0; i < revs->pending.nr; i++) {
1699 struct object_array_entry *entry = revs->pending.objects + i;
1700 struct object *obj = entry->item;
1701 const char *name = entry->name;
1702
1703 if (obj->flags & (UNINTERESTING | SEEN))
1704 continue;
1705 if (obj->type == OBJ_TAG) {
1706 obj->flags |= SEEN;
1707 p = add_one_object(obj, p);
1708 continue;
1709 }
1710 if (obj->type == OBJ_TREE) {
1711 p = process_tree((struct tree *)obj, p, NULL, name);
1712 continue;
1713 }
1714 if (obj->type == OBJ_BLOB) {
1715 p = process_blob((struct blob *)obj, p, NULL, name);
1716 continue;
1717 }
1718 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1719 }
1720
1721 while (objects) {
1722 if (!(objects->item->flags & UNINTERESTING))
1723 count += add_send_request(objects->item, lock);
1724 objects = objects->next;
1725 }
1726
1727 return count;
1728 }
1729
1730 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1731 {
1732 struct active_request_slot *slot;
1733 struct slot_results results;
1734 char *if_header;
1735 struct buffer out_buffer = { STRBUF_INIT, 0 };
1736 struct curl_slist *dav_headers = NULL;
1737
1738 if_header = xmalloc(strlen(lock->token) + 25);
1739 sprintf(if_header, "If: (<%s>)", lock->token);
1740 dav_headers = curl_slist_append(dav_headers, if_header);
1741
1742 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1743
1744 slot = get_active_slot();
1745 slot->results = &results;
1746 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1747 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1748 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1749 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1750 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1751 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1752 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1753 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1754 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1755
1756 if (start_active_slot(slot)) {
1757 run_active_slot(slot);
1758 strbuf_release(&out_buffer.buf);
1759 free(if_header);
1760 if (results.curl_result != CURLE_OK) {
1761 fprintf(stderr,
1762 "PUT error: curl result=%d, HTTP code=%ld\n",
1763 results.curl_result, results.http_code);
1764 /* We should attempt recovery? */
1765 return 0;
1766 }
1767 } else {
1768 strbuf_release(&out_buffer.buf);
1769 free(if_header);
1770 fprintf(stderr, "Unable to start PUT request\n");
1771 return 0;
1772 }
1773
1774 return 1;
1775 }
1776
1777 static struct ref *local_refs, **local_tail;
1778 static struct ref *remote_refs, **remote_tail;
1779
1780 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1781 {
1782 struct ref *ref;
1783 int len = strlen(refname) + 1;
1784 ref = xcalloc(1, sizeof(*ref) + len);
1785 hashcpy(ref->new_sha1, sha1);
1786 memcpy(ref->name, refname, len);
1787 *local_tail = ref;
1788 local_tail = &ref->next;
1789 return 0;
1790 }
1791
1792 static void one_remote_ref(char *refname)
1793 {
1794 struct ref *ref;
1795 struct object *obj;
1796
1797 ref = alloc_ref(refname);
1798
1799 if (http_fetch_ref(remote->url, ref) != 0) {
1800 fprintf(stderr,
1801 "Unable to fetch ref %s from %s\n",
1802 refname, remote->url);
1803 free(ref);
1804 return;
1805 }
1806
1807 /*
1808 * Fetch a copy of the object if it doesn't exist locally - it
1809 * may be required for updating server info later.
1810 */
1811 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1812 obj = lookup_unknown_object(ref->old_sha1);
1813 if (obj) {
1814 fprintf(stderr, " fetch %s for %s\n",
1815 sha1_to_hex(ref->old_sha1), refname);
1816 add_fetch_request(obj);
1817 }
1818 }
1819
1820 *remote_tail = ref;
1821 remote_tail = &ref->next;
1822 }
1823
1824 static void get_local_heads(void)
1825 {
1826 local_tail = &local_refs;
1827 for_each_ref(one_local_ref, NULL);
1828 }
1829
1830 static void get_dav_remote_heads(void)
1831 {
1832 remote_tail = &remote_refs;
1833 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1834 }
1835
1836 static int is_zero_sha1(const unsigned char *sha1)
1837 {
1838 int i;
1839
1840 for (i = 0; i < 20; i++) {
1841 if (*sha1++)
1842 return 0;
1843 }
1844 return 1;
1845 }
1846
1847 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1848 {
1849 while (list) {
1850 struct commit_list *temp = list;
1851 temp->item->object.flags &= ~mark;
1852 list = temp->next;
1853 free(temp);
1854 }
1855 }
1856
1857 static int ref_newer(const unsigned char *new_sha1,
1858 const unsigned char *old_sha1)
1859 {
1860 struct object *o;
1861 struct commit *old, *new;
1862 struct commit_list *list, *used;
1863 int found = 0;
1864
1865 /* Both new and old must be commit-ish and new is descendant of
1866 * old. Otherwise we require --force.
1867 */
1868 o = deref_tag(parse_object(old_sha1), NULL, 0);
1869 if (!o || o->type != OBJ_COMMIT)
1870 return 0;
1871 old = (struct commit *) o;
1872
1873 o = deref_tag(parse_object(new_sha1), NULL, 0);
1874 if (!o || o->type != OBJ_COMMIT)
1875 return 0;
1876 new = (struct commit *) o;
1877
1878 if (parse_commit(new) < 0)
1879 return 0;
1880
1881 used = list = NULL;
1882 commit_list_insert(new, &list);
1883 while (list) {
1884 new = pop_most_recent_commit(&list, TMP_MARK);
1885 commit_list_insert(new, &used);
1886 if (new == old) {
1887 found = 1;
1888 break;
1889 }
1890 }
1891 unmark_and_free(list, TMP_MARK);
1892 unmark_and_free(used, TMP_MARK);
1893 return found;
1894 }
1895
1896 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1897 {
1898 struct strbuf *buf = (struct strbuf *)ls->userData;
1899 struct object *o;
1900 int len;
1901 char *ref_info;
1902 struct ref *ref;
1903
1904 ref = alloc_ref(ls->dentry_name);
1905
1906 if (http_fetch_ref(remote->url, ref) != 0) {
1907 fprintf(stderr,
1908 "Unable to fetch ref %s from %s\n",
1909 ls->dentry_name, remote->url);
1910 aborted = 1;
1911 free(ref);
1912 return;
1913 }
1914
1915 o = parse_object(ref->old_sha1);
1916 if (!o) {
1917 fprintf(stderr,
1918 "Unable to parse object %s for remote ref %s\n",
1919 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1920 aborted = 1;
1921 free(ref);
1922 return;
1923 }
1924
1925 len = strlen(ls->dentry_name) + 42;
1926 ref_info = xcalloc(len + 1, 1);
1927 sprintf(ref_info, "%s %s\n",
1928 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1929 fwrite_buffer(ref_info, 1, len, buf);
1930 free(ref_info);
1931
1932 if (o->type == OBJ_TAG) {
1933 o = deref_tag(o, ls->dentry_name, 0);
1934 if (o) {
1935 len = strlen(ls->dentry_name) + 45;
1936 ref_info = xcalloc(len + 1, 1);
1937 sprintf(ref_info, "%s %s^{}\n",
1938 sha1_to_hex(o->sha1), ls->dentry_name);
1939 fwrite_buffer(ref_info, 1, len, buf);
1940 free(ref_info);
1941 }
1942 }
1943 free(ref);
1944 }
1945
1946 static void update_remote_info_refs(struct remote_lock *lock)
1947 {
1948 struct buffer buffer = { STRBUF_INIT, 0 };
1949 struct active_request_slot *slot;
1950 struct slot_results results;
1951 char *if_header;
1952 struct curl_slist *dav_headers = NULL;
1953
1954 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1955 add_remote_info_ref, &buffer.buf);
1956 if (!aborted) {
1957 if_header = xmalloc(strlen(lock->token) + 25);
1958 sprintf(if_header, "If: (<%s>)", lock->token);
1959 dav_headers = curl_slist_append(dav_headers, if_header);
1960
1961 slot = get_active_slot();
1962 slot->results = &results;
1963 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1964 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1965 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1966 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1967 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1968 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1969 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1970 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1971 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1972
1973 if (start_active_slot(slot)) {
1974 run_active_slot(slot);
1975 if (results.curl_result != CURLE_OK) {
1976 fprintf(stderr,
1977 "PUT error: curl result=%d, HTTP code=%ld\n",
1978 results.curl_result, results.http_code);
1979 }
1980 }
1981 free(if_header);
1982 }
1983 strbuf_release(&buffer.buf);
1984 }
1985
1986 static int remote_exists(const char *path)
1987 {
1988 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1989 struct active_request_slot *slot;
1990 struct slot_results results;
1991 int ret = -1;
1992
1993 sprintf(url, "%s%s", remote->url, path);
1994
1995 slot = get_active_slot();
1996 slot->results = &results;
1997 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1998 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1999
2000 if (start_active_slot(slot)) {
2001 run_active_slot(slot);
2002 if (results.http_code == 404)
2003 ret = 0;
2004 else if (results.curl_result == CURLE_OK)
2005 ret = 1;
2006 else
2007 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2008 } else {
2009 fprintf(stderr, "Unable to start HEAD request\n");
2010 }
2011
2012 free(url);
2013 return ret;
2014 }
2015
2016 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2017 {
2018 char *url;
2019 struct strbuf buffer = STRBUF_INIT;
2020 struct active_request_slot *slot;
2021 struct slot_results results;
2022
2023 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2024 sprintf(url, "%s%s", remote->url, path);
2025
2026 slot = get_active_slot();
2027 slot->results = &results;
2028 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2029 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2030 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2031 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2032 if (start_active_slot(slot)) {
2033 run_active_slot(slot);
2034 if (results.curl_result != CURLE_OK) {
2035 die("Couldn't get %s for remote symref\n%s",
2036 url, curl_errorstr);
2037 }
2038 } else {
2039 die("Unable to start remote symref request");
2040 }
2041 free(url);
2042
2043 free(*symref);
2044 *symref = NULL;
2045 hashclr(sha1);
2046
2047 if (buffer.len == 0)
2048 return;
2049
2050 /* If it's a symref, set the refname; otherwise try for a sha1 */
2051 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2052 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2053 } else {
2054 get_sha1_hex(buffer.buf, sha1);
2055 }
2056
2057 strbuf_release(&buffer);
2058 }
2059
2060 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2061 {
2062 struct commit *head = lookup_commit(head_sha1);
2063 struct commit *branch = lookup_commit(branch_sha1);
2064 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2065
2066 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2067 }
2068
2069 static int delete_remote_branch(char *pattern, int force)
2070 {
2071 struct ref *refs = remote_refs;
2072 struct ref *remote_ref = NULL;
2073 unsigned char head_sha1[20];
2074 char *symref = NULL;
2075 int match;
2076 int patlen = strlen(pattern);
2077 int i;
2078 struct active_request_slot *slot;
2079 struct slot_results results;
2080 char *url;
2081
2082 /* Find the remote branch(es) matching the specified branch name */
2083 for (match = 0; refs; refs = refs->next) {
2084 char *name = refs->name;
2085 int namelen = strlen(name);
2086 if (namelen < patlen ||
2087 memcmp(name + namelen - patlen, pattern, patlen))
2088 continue;
2089 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2090 continue;
2091 match++;
2092 remote_ref = refs;
2093 }
2094 if (match == 0)
2095 return error("No remote branch matches %s", pattern);
2096 if (match != 1)
2097 return error("More than one remote branch matches %s",
2098 pattern);
2099
2100 /*
2101 * Remote HEAD must be a symref (not exactly foolproof; a remote
2102 * symlink to a symref will look like a symref)
2103 */
2104 fetch_symref("HEAD", &symref, head_sha1);
2105 if (!symref)
2106 return error("Remote HEAD is not a symref");
2107
2108 /* Remote branch must not be the remote HEAD */
2109 for (i=0; symref && i<MAXDEPTH; i++) {
2110 if (!strcmp(remote_ref->name, symref))
2111 return error("Remote branch %s is the current HEAD",
2112 remote_ref->name);
2113 fetch_symref(symref, &symref, head_sha1);
2114 }
2115
2116 /* Run extra sanity checks if delete is not forced */
2117 if (!force) {
2118 /* Remote HEAD must resolve to a known object */
2119 if (symref)
2120 return error("Remote HEAD symrefs too deep");
2121 if (is_zero_sha1(head_sha1))
2122 return error("Unable to resolve remote HEAD");
2123 if (!has_sha1_file(head_sha1))
2124 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2125
2126 /* Remote branch must resolve to a known object */
2127 if (is_zero_sha1(remote_ref->old_sha1))
2128 return error("Unable to resolve remote branch %s",
2129 remote_ref->name);
2130 if (!has_sha1_file(remote_ref->old_sha1))
2131 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));
2132
2133 /* Remote branch must be an ancestor of remote HEAD */
2134 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2135 return error("The branch '%s' is not an ancestor "
2136 "of your current HEAD.\n"
2137 "If you are sure you want to delete it,"
2138 " run:\n\t'git http-push -D %s %s'",
2139 remote_ref->name, remote->url, pattern);
2140 }
2141 }
2142
2143 /* Send delete request */
2144 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2145 if (dry_run)
2146 return 0;
2147 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2148 sprintf(url, "%s%s", remote->url, remote_ref->name);
2149 slot = get_active_slot();
2150 slot->results = &results;
2151 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2152 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2153 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2154 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2155 if (start_active_slot(slot)) {
2156 run_active_slot(slot);
2157 free(url);
2158 if (results.curl_result != CURLE_OK)
2159 return error("DELETE request failed (%d/%ld)\n",
2160 results.curl_result, results.http_code);
2161 } else {
2162 free(url);
2163 return error("Unable to start DELETE request");
2164 }
2165
2166 return 0;
2167 }
2168
2169 int main(int argc, char **argv)
2170 {
2171 struct transfer_request *request;
2172 struct transfer_request *next_request;
2173 int nr_refspec = 0;
2174 char **refspec = NULL;
2175 struct remote_lock *ref_lock = NULL;
2176 struct remote_lock *info_ref_lock = NULL;
2177 struct rev_info revs;
2178 int delete_branch = 0;
2179 int force_delete = 0;
2180 int objects_to_send;
2181 int rc = 0;
2182 int i;
2183 int new_refs;
2184 struct ref *ref;
2185 char *rewritten_url = NULL;
2186
2187 setup_git_directory();
2188
2189 remote = xcalloc(sizeof(*remote), 1);
2190
2191 argv++;
2192 for (i = 1; i < argc; i++, argv++) {
2193 char *arg = *argv;
2194
2195 if (*arg == '-') {
2196 if (!strcmp(arg, "--all")) {
2197 push_all = MATCH_REFS_ALL;
2198 continue;
2199 }
2200 if (!strcmp(arg, "--force")) {
2201 force_all = 1;
2202 continue;
2203 }
2204 if (!strcmp(arg, "--dry-run")) {
2205 dry_run = 1;
2206 continue;
2207 }
2208 if (!strcmp(arg, "--verbose")) {
2209 push_verbosely = 1;
2210 continue;
2211 }
2212 if (!strcmp(arg, "-d")) {
2213 delete_branch = 1;
2214 continue;
2215 }
2216 if (!strcmp(arg, "-D")) {
2217 delete_branch = 1;
2218 force_delete = 1;
2219 continue;
2220 }
2221 }
2222 if (!remote->url) {
2223 char *path = strstr(arg, "//");
2224 remote->url = arg;
2225 remote->path_len = strlen(arg);
2226 if (path) {
2227 remote->path = strchr(path+2, '/');
2228 if (remote->path)
2229 remote->path_len = strlen(remote->path);
2230 }
2231 continue;
2232 }
2233 refspec = argv;
2234 nr_refspec = argc - i;
2235 break;
2236 }
2237
2238 #ifndef USE_CURL_MULTI
2239 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2240 #endif
2241
2242 if (!remote->url)
2243 usage(http_push_usage);
2244
2245 if (delete_branch && nr_refspec != 1)
2246 die("You must specify only one branch name when deleting a remote branch");
2247
2248 memset(remote_dir_exists, -1, 256);
2249
2250 http_init(NULL);
2251
2252 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2253
2254 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2255 rewritten_url = xmalloc(strlen(remote->url)+2);
2256 strcpy(rewritten_url, remote->url);
2257 strcat(rewritten_url, "/");
2258 remote->path = rewritten_url + (remote->path - remote->url);
2259 remote->path_len++;
2260 remote->url = rewritten_url;
2261 }
2262
2263 /* Verify DAV compliance/lock support */
2264 if (!locking_available()) {
2265 rc = 1;
2266 goto cleanup;
2267 }
2268
2269 signal(SIGINT, remove_locks_on_signal);
2270 signal(SIGHUP, remove_locks_on_signal);
2271 signal(SIGQUIT, remove_locks_on_signal);
2272 signal(SIGTERM, remove_locks_on_signal);
2273
2274 /* Check whether the remote has server info files */
2275 remote->can_update_info_refs = 0;
2276 remote->has_info_refs = remote_exists("info/refs");
2277 remote->has_info_packs = remote_exists("objects/info/packs");
2278 if (remote->has_info_refs) {
2279 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2280 if (info_ref_lock)
2281 remote->can_update_info_refs = 1;
2282 else {
2283 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2284 rc = 1;
2285 goto cleanup;
2286 }
2287 }
2288 if (remote->has_info_packs)
2289 fetch_indices();
2290
2291 /* Get a list of all local and remote heads to validate refspecs */
2292 get_local_heads();
2293 fprintf(stderr, "Fetching remote heads...\n");
2294 get_dav_remote_heads();
2295
2296 /* Remove a remote branch if -d or -D was specified */
2297 if (delete_branch) {
2298 if (delete_remote_branch(refspec[0], force_delete) == -1)
2299 fprintf(stderr, "Unable to delete remote branch %s\n",
2300 refspec[0]);
2301 goto cleanup;
2302 }
2303
2304 /* match them up */
2305 if (!remote_tail)
2306 remote_tail = &remote_refs;
2307 if (match_refs(local_refs, remote_refs, &remote_tail,
2308 nr_refspec, (const char **) refspec, push_all)) {
2309 rc = -1;
2310 goto cleanup;
2311 }
2312 if (!remote_refs) {
2313 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2314 rc = 0;
2315 goto cleanup;
2316 }
2317
2318 new_refs = 0;
2319 for (ref = remote_refs; ref; ref = ref->next) {
2320 char old_hex[60], *new_hex;
2321 const char *commit_argv[4];
2322 int commit_argc;
2323 char *new_sha1_hex, *old_sha1_hex;
2324
2325 if (!ref->peer_ref)
2326 continue;
2327
2328 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2329 if (delete_remote_branch(ref->name, 1) == -1) {
2330 error("Could not remove %s", ref->name);
2331 rc = -4;
2332 }
2333 new_refs++;
2334 continue;
2335 }
2336
2337 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2338 if (push_verbosely || 1)
2339 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2340 continue;
2341 }
2342
2343 if (!force_all &&
2344 !is_zero_sha1(ref->old_sha1) &&
2345 !ref->force) {
2346 if (!has_sha1_file(ref->old_sha1) ||
2347 !ref_newer(ref->peer_ref->new_sha1,
2348 ref->old_sha1)) {
2349 /*
2350 * We do not have the remote ref, or
2351 * we know that the remote ref is not
2352 * an ancestor of what we are trying to
2353 * push. Either way this can be losing
2354 * commits at the remote end and likely
2355 * we were not up to date to begin with.
2356 */
2357 error("remote '%s' is not an ancestor of\n"
2358 "local '%s'.\n"
2359 "Maybe you are not up-to-date and "
2360 "need to pull first?",
2361 ref->name,
2362 ref->peer_ref->name);
2363 rc = -2;
2364 continue;
2365 }
2366 }
2367 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2368 new_refs++;
2369 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2370 new_hex = sha1_to_hex(ref->new_sha1);
2371
2372 fprintf(stderr, "updating '%s'", ref->name);
2373 if (strcmp(ref->name, ref->peer_ref->name))
2374 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2375 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2376 if (dry_run)
2377 continue;
2378
2379 /* Lock remote branch ref */
2380 ref_lock = lock_remote(ref->name, LOCK_TIME);
2381 if (ref_lock == NULL) {
2382 fprintf(stderr, "Unable to lock remote branch %s\n",
2383 ref->name);
2384 rc = 1;
2385 continue;
2386 }
2387
2388 /* Set up revision info for this refspec */
2389 commit_argc = 3;
2390 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2391 old_sha1_hex = NULL;
2392 commit_argv[1] = "--objects";
2393 commit_argv[2] = new_sha1_hex;
2394 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2395 old_sha1_hex = xmalloc(42);
2396 sprintf(old_sha1_hex, "^%s",
2397 sha1_to_hex(ref->old_sha1));
2398 commit_argv[3] = old_sha1_hex;
2399 commit_argc++;
2400 }
2401 init_revisions(&revs, setup_git_directory());
2402 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2403 revs.edge_hint = 0; /* just in case */
2404 free(new_sha1_hex);
2405 if (old_sha1_hex) {
2406 free(old_sha1_hex);
2407 commit_argv[1] = NULL;
2408 }
2409
2410 /* Generate a list of objects that need to be pushed */
2411 pushing = 0;
2412 if (prepare_revision_walk(&revs))
2413 die("revision walk setup failed");
2414 mark_edges_uninteresting(revs.commits, &revs, NULL);
2415 objects_to_send = get_delta(&revs, ref_lock);
2416 finish_all_active_slots();
2417
2418 /* Push missing objects to remote, this would be a
2419 convenient time to pack them first if appropriate. */
2420 pushing = 1;
2421 if (objects_to_send)
2422 fprintf(stderr, " sending %d objects\n",
2423 objects_to_send);
2424 #ifdef USE_CURL_MULTI
2425 fill_active_slots();
2426 add_fill_function(NULL, fill_active_slot);
2427 #endif
2428 do {
2429 finish_all_active_slots();
2430 #ifdef USE_CURL_MULTI
2431 fill_active_slots();
2432 #endif
2433 } while (request_queue_head && !aborted);
2434
2435 /* Update the remote branch if all went well */
2436 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2437 rc = 1;
2438
2439 if (!rc)
2440 fprintf(stderr, " done\n");
2441 unlock_remote(ref_lock);
2442 check_locks();
2443 }
2444
2445 /* Update remote server info if appropriate */
2446 if (remote->has_info_refs && new_refs) {
2447 if (info_ref_lock && remote->can_update_info_refs) {
2448 fprintf(stderr, "Updating remote server info\n");
2449 if (!dry_run)
2450 update_remote_info_refs(info_ref_lock);
2451 } else {
2452 fprintf(stderr, "Unable to update server info\n");
2453 }
2454 }
2455
2456 cleanup:
2457 free(rewritten_url);
2458 if (info_ref_lock)
2459 unlock_remote(info_ref_lock);
2460 free(remote);
2461
2462 curl_slist_free_all(no_pragma_header);
2463
2464 http_cleanup();
2465
2466 request = request_queue_head;
2467 while (request != NULL) {
2468 next_request = request->next;
2469 release_request(request);
2470 request = next_request;
2471 }
2472
2473 return rc;
2474 }
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