http-push: use strbuf instead of fwrite_buffer
[git/git.git] / http-push.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "tag.h"
4 #include "blob.h"
5 #include "http.h"
6 #include "refs.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "exec_cmd.h"
10 #include "remote.h"
11 #include "list-objects.h"
12 #include "sigchain.h"
13
14 #ifdef EXPAT_NEEDS_XMLPARSE_H
15 #include <xmlparse.h>
16 #else
17 #include <expat.h>
18 #endif
19
20 static const char http_push_usage[] =
21 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
22
23 #ifndef XML_STATUS_OK
24 enum XML_Status {
25 XML_STATUS_OK = 1,
26 XML_STATUS_ERROR = 0
27 };
28 #define XML_STATUS_OK 1
29 #define XML_STATUS_ERROR 0
30 #endif
31
32 #define PREV_BUF_SIZE 4096
33
34 /* DAV methods */
35 #define DAV_LOCK "LOCK"
36 #define DAV_MKCOL "MKCOL"
37 #define DAV_MOVE "MOVE"
38 #define DAV_PROPFIND "PROPFIND"
39 #define DAV_PUT "PUT"
40 #define DAV_UNLOCK "UNLOCK"
41 #define DAV_DELETE "DELETE"
42
43 /* DAV lock flags */
44 #define DAV_PROP_LOCKWR (1u << 0)
45 #define DAV_PROP_LOCKEX (1u << 1)
46 #define DAV_LOCK_OK (1u << 2)
47
48 /* DAV XML properties */
49 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
50 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
51 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
52 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
53 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
54 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
55 #define DAV_PROPFIND_RESP ".multistatus.response"
56 #define DAV_PROPFIND_NAME ".multistatus.response.href"
57 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
58
59 /* DAV request body templates */
60 #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>"
61 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
62 #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>"
63
64 #define LOCK_TIME 600
65 #define LOCK_REFRESH 30
66
67 /* Remember to update object flag allocation in object.h */
68 #define LOCAL (1u<<16)
69 #define REMOTE (1u<<17)
70 #define FETCHING (1u<<18)
71 #define PUSHING (1u<<19)
72
73 /* We allow "recursive" symbolic refs. Only within reason, though */
74 #define MAXDEPTH 5
75
76 static int pushing;
77 static int aborted;
78 static signed char remote_dir_exists[256];
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 static int helper_status;
85
86 static struct object_list *objects;
87
88 struct repo {
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 *repo;
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 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 enum transfer_state state;
121 CURLcode curl_result;
122 char errorstr[CURL_ERROR_SIZE];
123 long http_code;
124 void *userData;
125 struct active_request_slot *slot;
126 struct transfer_request *next;
127 };
128
129 static struct transfer_request *request_queue_head;
130
131 struct xml_ctx {
132 char *name;
133 int len;
134 char *cdata;
135 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
136 void *userData;
137 };
138
139 struct remote_lock {
140 char *url;
141 char *owner;
142 char *token;
143 char tmpfile_suffix[41];
144 time_t start_time;
145 long timeout;
146 int refreshing;
147 struct remote_lock *next;
148 };
149
150 /* Flags that control remote_ls processing */
151 #define PROCESS_FILES (1u << 0)
152 #define PROCESS_DIRS (1u << 1)
153 #define RECURSIVE (1u << 2)
154
155 /* Flags that remote_ls passes to callback functions */
156 #define IS_DIR (1u << 0)
157
158 struct remote_ls_ctx {
159 char *path;
160 void (*userFunc)(struct remote_ls_ctx *ls);
161 void *userData;
162 int flags;
163 char *dentry_name;
164 int dentry_flags;
165 struct remote_ls_ctx *parent;
166 };
167
168 /* get_dav_token_headers options */
169 enum dav_header_flag {
170 DAV_HEADER_IF = (1u << 0),
171 DAV_HEADER_LOCK = (1u << 1),
172 DAV_HEADER_TIMEOUT = (1u << 2)
173 };
174
175 static char *xml_entities(const char *s)
176 {
177 struct strbuf buf = STRBUF_INIT;
178 strbuf_addstr_xml_quoted(&buf, s);
179 return strbuf_detach(&buf, NULL);
180 }
181
182 static void curl_setup_http_get(CURL *curl, const char *url,
183 const char *custom_req)
184 {
185 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
186 curl_easy_setopt(curl, CURLOPT_URL, url);
187 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
188 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
189 }
190
191 static void curl_setup_http(CURL *curl, const char *url,
192 const char *custom_req, struct buffer *buffer,
193 curl_write_callback write_fn)
194 {
195 curl_easy_setopt(curl, CURLOPT_PUT, 1);
196 curl_easy_setopt(curl, CURLOPT_URL, url);
197 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
198 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
199 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
200 #ifndef NO_CURL_IOCTL
201 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
202 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
203 #endif
204 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
205 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
206 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
207 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
208 }
209
210 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
211 {
212 struct strbuf buf = STRBUF_INIT;
213 struct curl_slist *dav_headers = NULL;
214
215 if (options & DAV_HEADER_IF) {
216 strbuf_addf(&buf, "If: (<%s>)", lock->token);
217 dav_headers = curl_slist_append(dav_headers, buf.buf);
218 strbuf_reset(&buf);
219 }
220 if (options & DAV_HEADER_LOCK) {
221 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_TIMEOUT) {
226 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 strbuf_release(&buf);
231
232 return dav_headers;
233 }
234
235 static void finish_request(struct transfer_request *request);
236 static void release_request(struct transfer_request *request);
237
238 static void process_response(void *callback_data)
239 {
240 struct transfer_request *request =
241 (struct transfer_request *)callback_data;
242
243 finish_request(request);
244 }
245
246 #ifdef USE_CURL_MULTI
247
248 static void start_fetch_loose(struct transfer_request *request)
249 {
250 struct active_request_slot *slot;
251 struct http_object_request *obj_req;
252
253 obj_req = new_http_object_request(repo->url, request->obj->sha1);
254 if (obj_req == NULL) {
255 request->state = ABORTED;
256 return;
257 }
258
259 slot = obj_req->slot;
260 slot->callback_func = process_response;
261 slot->callback_data = request;
262 request->slot = slot;
263 request->userData = obj_req;
264
265 /* Try to get the request started, abort the request on error */
266 request->state = RUN_FETCH_LOOSE;
267 if (!start_active_slot(slot)) {
268 fprintf(stderr, "Unable to start GET request\n");
269 repo->can_update_info_refs = 0;
270 release_http_object_request(obj_req);
271 release_request(request);
272 }
273 }
274
275 static void start_mkcol(struct transfer_request *request)
276 {
277 char *hex = sha1_to_hex(request->obj->sha1);
278 struct active_request_slot *slot;
279
280 request->url = get_remote_object_url(repo->url, hex, 1);
281
282 slot = get_active_slot();
283 slot->callback_func = process_response;
284 slot->callback_data = request;
285 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
286 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
287
288 if (start_active_slot(slot)) {
289 request->slot = slot;
290 request->state = RUN_MKCOL;
291 } else {
292 request->state = ABORTED;
293 free(request->url);
294 request->url = NULL;
295 }
296 }
297 #endif
298
299 static void start_fetch_packed(struct transfer_request *request)
300 {
301 struct packed_git *target;
302
303 struct transfer_request *check_request = request_queue_head;
304 struct http_pack_request *preq;
305
306 target = find_sha1_pack(request->obj->sha1, repo->packs);
307 if (!target) {
308 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
309 repo->can_update_info_refs = 0;
310 release_request(request);
311 return;
312 }
313
314 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
315 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
316
317 preq = new_http_pack_request(target, repo->url);
318 if (preq == NULL) {
319 repo->can_update_info_refs = 0;
320 return;
321 }
322 preq->lst = &repo->packs;
323
324 /* Make sure there isn't another open request for this pack */
325 while (check_request) {
326 if (check_request->state == RUN_FETCH_PACKED &&
327 !strcmp(check_request->url, preq->url)) {
328 release_http_pack_request(preq);
329 release_request(request);
330 return;
331 }
332 check_request = check_request->next;
333 }
334
335 preq->slot->callback_func = process_response;
336 preq->slot->callback_data = request;
337 request->slot = preq->slot;
338 request->userData = preq;
339
340 /* Try to get the request started, abort the request on error */
341 request->state = RUN_FETCH_PACKED;
342 if (!start_active_slot(preq->slot)) {
343 fprintf(stderr, "Unable to start GET request\n");
344 release_http_pack_request(preq);
345 repo->can_update_info_refs = 0;
346 release_request(request);
347 }
348 }
349
350 static void start_put(struct transfer_request *request)
351 {
352 char *hex = sha1_to_hex(request->obj->sha1);
353 struct active_request_slot *slot;
354 struct strbuf buf = STRBUF_INIT;
355 enum object_type type;
356 char hdr[50];
357 void *unpacked;
358 unsigned long len;
359 int hdrlen;
360 ssize_t size;
361 git_zstream stream;
362
363 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
364 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
365
366 /* Set it up */
367 git_deflate_init(&stream, zlib_compression_level);
368 size = git_deflate_bound(&stream, len + hdrlen);
369 strbuf_init(&request->buffer.buf, size);
370 request->buffer.posn = 0;
371
372 /* Compress it */
373 stream.next_out = (unsigned char *)request->buffer.buf.buf;
374 stream.avail_out = size;
375
376 /* First header.. */
377 stream.next_in = (void *)hdr;
378 stream.avail_in = hdrlen;
379 while (git_deflate(&stream, 0) == Z_OK)
380 ; /* nothing */
381
382 /* Then the data itself.. */
383 stream.next_in = unpacked;
384 stream.avail_in = len;
385 while (git_deflate(&stream, Z_FINISH) == Z_OK)
386 ; /* nothing */
387 git_deflate_end(&stream);
388 free(unpacked);
389
390 request->buffer.buf.len = stream.total_out;
391
392 strbuf_addstr(&buf, "Destination: ");
393 append_remote_object_url(&buf, repo->url, hex, 0);
394 request->dest = strbuf_detach(&buf, NULL);
395
396 append_remote_object_url(&buf, repo->url, hex, 0);
397 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
398 request->url = strbuf_detach(&buf, NULL);
399
400 slot = get_active_slot();
401 slot->callback_func = process_response;
402 slot->callback_data = request;
403 curl_setup_http(slot->curl, request->url, DAV_PUT,
404 &request->buffer, fwrite_null);
405
406 if (start_active_slot(slot)) {
407 request->slot = slot;
408 request->state = RUN_PUT;
409 } else {
410 request->state = ABORTED;
411 free(request->url);
412 request->url = NULL;
413 }
414 }
415
416 static void start_move(struct transfer_request *request)
417 {
418 struct active_request_slot *slot;
419 struct curl_slist *dav_headers = NULL;
420
421 slot = get_active_slot();
422 slot->callback_func = process_response;
423 slot->callback_data = request;
424 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
425 dav_headers = curl_slist_append(dav_headers, request->dest);
426 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
427 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
428
429 if (start_active_slot(slot)) {
430 request->slot = slot;
431 request->state = RUN_MOVE;
432 } else {
433 request->state = ABORTED;
434 free(request->url);
435 request->url = NULL;
436 }
437 }
438
439 static int refresh_lock(struct remote_lock *lock)
440 {
441 struct active_request_slot *slot;
442 struct slot_results results;
443 struct curl_slist *dav_headers;
444 int rc = 0;
445
446 lock->refreshing = 1;
447
448 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
449
450 slot = get_active_slot();
451 slot->results = &results;
452 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
454
455 if (start_active_slot(slot)) {
456 run_active_slot(slot);
457 if (results.curl_result != CURLE_OK) {
458 fprintf(stderr, "LOCK HTTP error %ld\n",
459 results.http_code);
460 } else {
461 lock->start_time = time(NULL);
462 rc = 1;
463 }
464 }
465
466 lock->refreshing = 0;
467 curl_slist_free_all(dav_headers);
468
469 return rc;
470 }
471
472 static void check_locks(void)
473 {
474 struct remote_lock *lock = repo->locks;
475 time_t current_time = time(NULL);
476 int time_remaining;
477
478 while (lock) {
479 time_remaining = lock->start_time + lock->timeout -
480 current_time;
481 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
482 if (!refresh_lock(lock)) {
483 fprintf(stderr,
484 "Unable to refresh lock for %s\n",
485 lock->url);
486 aborted = 1;
487 return;
488 }
489 }
490 lock = lock->next;
491 }
492 }
493
494 static void release_request(struct transfer_request *request)
495 {
496 struct transfer_request *entry = request_queue_head;
497
498 if (request == request_queue_head) {
499 request_queue_head = request->next;
500 } else {
501 while (entry->next != NULL && entry->next != request)
502 entry = entry->next;
503 if (entry->next == request)
504 entry->next = entry->next->next;
505 }
506
507 free(request->url);
508 free(request);
509 }
510
511 static void finish_request(struct transfer_request *request)
512 {
513 struct http_pack_request *preq;
514 struct http_object_request *obj_req;
515
516 request->curl_result = request->slot->curl_result;
517 request->http_code = request->slot->http_code;
518 request->slot = NULL;
519
520 /* Keep locks active */
521 check_locks();
522
523 if (request->headers != NULL)
524 curl_slist_free_all(request->headers);
525
526 /* URL is reused for MOVE after PUT */
527 if (request->state != RUN_PUT) {
528 free(request->url);
529 request->url = NULL;
530 }
531
532 if (request->state == RUN_MKCOL) {
533 if (request->curl_result == CURLE_OK ||
534 request->http_code == 405) {
535 remote_dir_exists[request->obj->sha1[0]] = 1;
536 start_put(request);
537 } else {
538 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
539 sha1_to_hex(request->obj->sha1),
540 request->curl_result, request->http_code);
541 request->state = ABORTED;
542 aborted = 1;
543 }
544 } else if (request->state == RUN_PUT) {
545 if (request->curl_result == CURLE_OK) {
546 start_move(request);
547 } else {
548 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
549 sha1_to_hex(request->obj->sha1),
550 request->curl_result, request->http_code);
551 request->state = ABORTED;
552 aborted = 1;
553 }
554 } else if (request->state == RUN_MOVE) {
555 if (request->curl_result == CURLE_OK) {
556 if (push_verbosely)
557 fprintf(stderr, " sent %s\n",
558 sha1_to_hex(request->obj->sha1));
559 request->obj->flags |= REMOTE;
560 release_request(request);
561 } else {
562 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
563 sha1_to_hex(request->obj->sha1),
564 request->curl_result, request->http_code);
565 request->state = ABORTED;
566 aborted = 1;
567 }
568 } else if (request->state == RUN_FETCH_LOOSE) {
569 obj_req = (struct http_object_request *)request->userData;
570
571 if (finish_http_object_request(obj_req) == 0)
572 if (obj_req->rename == 0)
573 request->obj->flags |= (LOCAL | REMOTE);
574
575 /* Try fetching packed if necessary */
576 if (request->obj->flags & LOCAL) {
577 release_http_object_request(obj_req);
578 release_request(request);
579 } else
580 start_fetch_packed(request);
581
582 } else if (request->state == RUN_FETCH_PACKED) {
583 int fail = 1;
584 if (request->curl_result != CURLE_OK) {
585 fprintf(stderr, "Unable to get pack file %s\n%s",
586 request->url, curl_errorstr);
587 } else {
588 preq = (struct http_pack_request *)request->userData;
589
590 if (preq) {
591 if (finish_http_pack_request(preq) == 0)
592 fail = 0;
593 release_http_pack_request(preq);
594 }
595 }
596 if (fail)
597 repo->can_update_info_refs = 0;
598 release_request(request);
599 }
600 }
601
602 #ifdef USE_CURL_MULTI
603 static int is_running_queue;
604 static int fill_active_slot(void *unused)
605 {
606 struct transfer_request *request;
607
608 if (aborted || !is_running_queue)
609 return 0;
610
611 for (request = request_queue_head; request; request = request->next) {
612 if (request->state == NEED_FETCH) {
613 start_fetch_loose(request);
614 return 1;
615 } else if (pushing && request->state == NEED_PUSH) {
616 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
617 start_put(request);
618 } else {
619 start_mkcol(request);
620 }
621 return 1;
622 }
623 }
624 return 0;
625 }
626 #endif
627
628 static void get_remote_object_list(unsigned char parent);
629
630 static void add_fetch_request(struct object *obj)
631 {
632 struct transfer_request *request;
633
634 check_locks();
635
636 /*
637 * Don't fetch the object if it's known to exist locally
638 * or is already in the request queue
639 */
640 if (remote_dir_exists[obj->sha1[0]] == -1)
641 get_remote_object_list(obj->sha1[0]);
642 if (obj->flags & (LOCAL | FETCHING))
643 return;
644
645 obj->flags |= FETCHING;
646 request = xmalloc(sizeof(*request));
647 request->obj = obj;
648 request->url = NULL;
649 request->lock = NULL;
650 request->headers = NULL;
651 request->state = NEED_FETCH;
652 request->next = request_queue_head;
653 request_queue_head = request;
654
655 #ifdef USE_CURL_MULTI
656 fill_active_slots();
657 step_active_slots();
658 #endif
659 }
660
661 static int add_send_request(struct object *obj, struct remote_lock *lock)
662 {
663 struct transfer_request *request;
664 struct packed_git *target;
665
666 /* Keep locks active */
667 check_locks();
668
669 /*
670 * Don't push the object if it's known to exist on the remote
671 * or is already in the request queue
672 */
673 if (remote_dir_exists[obj->sha1[0]] == -1)
674 get_remote_object_list(obj->sha1[0]);
675 if (obj->flags & (REMOTE | PUSHING))
676 return 0;
677 target = find_sha1_pack(obj->sha1, repo->packs);
678 if (target) {
679 obj->flags |= REMOTE;
680 return 0;
681 }
682
683 obj->flags |= PUSHING;
684 request = xmalloc(sizeof(*request));
685 request->obj = obj;
686 request->url = NULL;
687 request->lock = lock;
688 request->headers = NULL;
689 request->state = NEED_PUSH;
690 request->next = request_queue_head;
691 request_queue_head = request;
692
693 #ifdef USE_CURL_MULTI
694 fill_active_slots();
695 step_active_slots();
696 #endif
697
698 return 1;
699 }
700
701 static int fetch_indices(void)
702 {
703 int ret;
704
705 if (push_verbosely)
706 fprintf(stderr, "Getting pack list\n");
707
708 switch (http_get_info_packs(repo->url, &repo->packs)) {
709 case HTTP_OK:
710 case HTTP_MISSING_TARGET:
711 ret = 0;
712 break;
713 default:
714 ret = -1;
715 }
716
717 return ret;
718 }
719
720 static void one_remote_object(const unsigned char *sha1)
721 {
722 struct object *obj;
723
724 obj = lookup_object(sha1);
725 if (!obj)
726 obj = parse_object(sha1);
727
728 /* Ignore remote objects that don't exist locally */
729 if (!obj)
730 return;
731
732 obj->flags |= REMOTE;
733 if (!object_list_contains(objects, obj))
734 object_list_insert(obj, &objects);
735 }
736
737 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
738 {
739 int *lock_flags = (int *)ctx->userData;
740
741 if (tag_closed) {
742 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
743 if ((*lock_flags & DAV_PROP_LOCKEX) &&
744 (*lock_flags & DAV_PROP_LOCKWR)) {
745 *lock_flags |= DAV_LOCK_OK;
746 }
747 *lock_flags &= DAV_LOCK_OK;
748 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
749 *lock_flags |= DAV_PROP_LOCKWR;
750 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
751 *lock_flags |= DAV_PROP_LOCKEX;
752 }
753 }
754 }
755
756 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
757 {
758 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
759 git_SHA_CTX sha_ctx;
760 unsigned char lock_token_sha1[20];
761
762 if (tag_closed && ctx->cdata) {
763 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
764 lock->owner = xstrdup(ctx->cdata);
765 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
766 const char *arg;
767 if (skip_prefix(ctx->cdata, "Second-", &arg))
768 lock->timeout = strtol(arg, NULL, 10);
769 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
770 lock->token = xstrdup(ctx->cdata);
771
772 git_SHA1_Init(&sha_ctx);
773 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
774 git_SHA1_Final(lock_token_sha1, &sha_ctx);
775
776 lock->tmpfile_suffix[0] = '_';
777 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
778 }
779 }
780 }
781
782 static void one_remote_ref(const char *refname);
783
784 static void
785 xml_start_tag(void *userData, const char *name, const char **atts)
786 {
787 struct xml_ctx *ctx = (struct xml_ctx *)userData;
788 const char *c = strchr(name, ':');
789 int old_namelen, new_len;
790
791 if (c == NULL)
792 c = name;
793 else
794 c++;
795
796 old_namelen = strlen(ctx->name);
797 new_len = old_namelen + strlen(c) + 2;
798
799 if (new_len > ctx->len) {
800 ctx->name = xrealloc(ctx->name, new_len);
801 ctx->len = new_len;
802 }
803 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
804
805 free(ctx->cdata);
806 ctx->cdata = NULL;
807
808 ctx->userFunc(ctx, 0);
809 }
810
811 static void
812 xml_end_tag(void *userData, const char *name)
813 {
814 struct xml_ctx *ctx = (struct xml_ctx *)userData;
815 const char *c = strchr(name, ':');
816 char *ep;
817
818 ctx->userFunc(ctx, 1);
819
820 if (c == NULL)
821 c = name;
822 else
823 c++;
824
825 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
826 *ep = 0;
827 }
828
829 static void
830 xml_cdata(void *userData, const XML_Char *s, int len)
831 {
832 struct xml_ctx *ctx = (struct xml_ctx *)userData;
833 free(ctx->cdata);
834 ctx->cdata = xmemdupz(s, len);
835 }
836
837 static struct remote_lock *lock_remote(const char *path, long timeout)
838 {
839 struct active_request_slot *slot;
840 struct slot_results results;
841 struct buffer out_buffer = { STRBUF_INIT, 0 };
842 struct strbuf in_buffer = STRBUF_INIT;
843 char *url;
844 char *ep;
845 char timeout_header[25];
846 struct remote_lock *lock = NULL;
847 struct curl_slist *dav_headers = NULL;
848 struct xml_ctx ctx;
849 char *escaped;
850
851 url = xstrfmt("%s%s", repo->url, path);
852
853 /* Make sure leading directories exist for the remote ref */
854 ep = strchr(url + strlen(repo->url) + 1, '/');
855 while (ep) {
856 char saved_character = ep[1];
857 ep[1] = '\0';
858 slot = get_active_slot();
859 slot->results = &results;
860 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
861 if (start_active_slot(slot)) {
862 run_active_slot(slot);
863 if (results.curl_result != CURLE_OK &&
864 results.http_code != 405) {
865 fprintf(stderr,
866 "Unable to create branch path %s\n",
867 url);
868 free(url);
869 return NULL;
870 }
871 } else {
872 fprintf(stderr, "Unable to start MKCOL request\n");
873 free(url);
874 return NULL;
875 }
876 ep[1] = saved_character;
877 ep = strchr(ep + 1, '/');
878 }
879
880 escaped = xml_entities(ident_default_email());
881 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
882 free(escaped);
883
884 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
885 dav_headers = curl_slist_append(dav_headers, timeout_header);
886 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
887
888 slot = get_active_slot();
889 slot->results = &results;
890 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
891 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
892 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
893
894 lock = xcalloc(1, sizeof(*lock));
895 lock->timeout = -1;
896
897 if (start_active_slot(slot)) {
898 run_active_slot(slot);
899 if (results.curl_result == CURLE_OK) {
900 XML_Parser parser = XML_ParserCreate(NULL);
901 enum XML_Status result;
902 ctx.name = xcalloc(10, 1);
903 ctx.len = 0;
904 ctx.cdata = NULL;
905 ctx.userFunc = handle_new_lock_ctx;
906 ctx.userData = lock;
907 XML_SetUserData(parser, &ctx);
908 XML_SetElementHandler(parser, xml_start_tag,
909 xml_end_tag);
910 XML_SetCharacterDataHandler(parser, xml_cdata);
911 result = XML_Parse(parser, in_buffer.buf,
912 in_buffer.len, 1);
913 free(ctx.name);
914 if (result != XML_STATUS_OK) {
915 fprintf(stderr, "XML error: %s\n",
916 XML_ErrorString(
917 XML_GetErrorCode(parser)));
918 lock->timeout = -1;
919 }
920 XML_ParserFree(parser);
921 }
922 } else {
923 fprintf(stderr, "Unable to start LOCK request\n");
924 }
925
926 curl_slist_free_all(dav_headers);
927 strbuf_release(&out_buffer.buf);
928 strbuf_release(&in_buffer);
929
930 if (lock->token == NULL || lock->timeout <= 0) {
931 free(lock->token);
932 free(lock->owner);
933 free(url);
934 free(lock);
935 lock = NULL;
936 } else {
937 lock->url = url;
938 lock->start_time = time(NULL);
939 lock->next = repo->locks;
940 repo->locks = lock;
941 }
942
943 return lock;
944 }
945
946 static int unlock_remote(struct remote_lock *lock)
947 {
948 struct active_request_slot *slot;
949 struct slot_results results;
950 struct remote_lock *prev = repo->locks;
951 struct curl_slist *dav_headers;
952 int rc = 0;
953
954 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
955
956 slot = get_active_slot();
957 slot->results = &results;
958 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
960
961 if (start_active_slot(slot)) {
962 run_active_slot(slot);
963 if (results.curl_result == CURLE_OK)
964 rc = 1;
965 else
966 fprintf(stderr, "UNLOCK HTTP error %ld\n",
967 results.http_code);
968 } else {
969 fprintf(stderr, "Unable to start UNLOCK request\n");
970 }
971
972 curl_slist_free_all(dav_headers);
973
974 if (repo->locks == lock) {
975 repo->locks = lock->next;
976 } else {
977 while (prev && prev->next != lock)
978 prev = prev->next;
979 if (prev)
980 prev->next = prev->next->next;
981 }
982
983 free(lock->owner);
984 free(lock->url);
985 free(lock->token);
986 free(lock);
987
988 return rc;
989 }
990
991 static void remove_locks(void)
992 {
993 struct remote_lock *lock = repo->locks;
994
995 fprintf(stderr, "Removing remote locks...\n");
996 while (lock) {
997 struct remote_lock *next = lock->next;
998 unlock_remote(lock);
999 lock = next;
1000 }
1001 }
1002
1003 static void remove_locks_on_signal(int signo)
1004 {
1005 remove_locks();
1006 sigchain_pop(signo);
1007 raise(signo);
1008 }
1009
1010 static void remote_ls(const char *path, int flags,
1011 void (*userFunc)(struct remote_ls_ctx *ls),
1012 void *userData);
1013
1014 /* extract hex from sharded "xx/x{40}" filename */
1015 static int get_sha1_hex_from_objpath(const char *path, unsigned char *sha1)
1016 {
1017 char hex[40];
1018
1019 if (strlen(path) != 41)
1020 return -1;
1021
1022 memcpy(hex, path, 2);
1023 path += 2;
1024 path++; /* skip '/' */
1025 memcpy(hex, path, 38);
1026
1027 return get_sha1_hex(hex, sha1);
1028 }
1029
1030 static void process_ls_object(struct remote_ls_ctx *ls)
1031 {
1032 unsigned int *parent = (unsigned int *)ls->userData;
1033 const char *path = ls->dentry_name;
1034 unsigned char sha1[20];
1035
1036 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1037 remote_dir_exists[*parent] = 1;
1038 return;
1039 }
1040
1041 if (!skip_prefix(path, "objects/", &path) ||
1042 get_sha1_hex_from_objpath(path, sha1))
1043 return;
1044
1045 one_remote_object(sha1);
1046 }
1047
1048 static void process_ls_ref(struct remote_ls_ctx *ls)
1049 {
1050 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1051 fprintf(stderr, " %s\n", ls->dentry_name);
1052 return;
1053 }
1054
1055 if (!(ls->dentry_flags & IS_DIR))
1056 one_remote_ref(ls->dentry_name);
1057 }
1058
1059 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1060 {
1061 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1062
1063 if (tag_closed) {
1064 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1065 if (ls->dentry_flags & IS_DIR) {
1066
1067 /* ensure collection names end with slash */
1068 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1069
1070 if (ls->flags & PROCESS_DIRS) {
1071 ls->userFunc(ls);
1072 }
1073 if (strcmp(ls->dentry_name, ls->path) &&
1074 ls->flags & RECURSIVE) {
1075 remote_ls(ls->dentry_name,
1076 ls->flags,
1077 ls->userFunc,
1078 ls->userData);
1079 }
1080 } else if (ls->flags & PROCESS_FILES) {
1081 ls->userFunc(ls);
1082 }
1083 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1084 char *path = ctx->cdata;
1085 if (*ctx->cdata == 'h') {
1086 path = strstr(path, "//");
1087 if (path) {
1088 path = strchr(path+2, '/');
1089 }
1090 }
1091 if (path) {
1092 const char *url = repo->url;
1093 if (repo->path)
1094 url = repo->path;
1095 if (strncmp(path, url, repo->path_len))
1096 error("Parsed path '%s' does not match url: '%s'",
1097 path, url);
1098 else {
1099 path += repo->path_len;
1100 ls->dentry_name = xstrdup(path);
1101 }
1102 }
1103 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1104 ls->dentry_flags |= IS_DIR;
1105 }
1106 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1107 free(ls->dentry_name);
1108 ls->dentry_name = NULL;
1109 ls->dentry_flags = 0;
1110 }
1111 }
1112
1113 /*
1114 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1115 * should _only_ heed the information from that file, instead of trying to
1116 * determine the refs from the remote file system (badly: it does not even
1117 * know about packed-refs).
1118 */
1119 static void remote_ls(const char *path, int flags,
1120 void (*userFunc)(struct remote_ls_ctx *ls),
1121 void *userData)
1122 {
1123 char *url = xstrfmt("%s%s", repo->url, path);
1124 struct active_request_slot *slot;
1125 struct slot_results results;
1126 struct strbuf in_buffer = STRBUF_INIT;
1127 struct buffer out_buffer = { STRBUF_INIT, 0 };
1128 struct curl_slist *dav_headers = NULL;
1129 struct xml_ctx ctx;
1130 struct remote_ls_ctx ls;
1131
1132 ls.flags = flags;
1133 ls.path = xstrdup(path);
1134 ls.dentry_name = NULL;
1135 ls.dentry_flags = 0;
1136 ls.userData = userData;
1137 ls.userFunc = userFunc;
1138
1139 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1140
1141 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1142 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1143
1144 slot = get_active_slot();
1145 slot->results = &results;
1146 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1147 &out_buffer, fwrite_buffer);
1148 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1149 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1150
1151 if (start_active_slot(slot)) {
1152 run_active_slot(slot);
1153 if (results.curl_result == CURLE_OK) {
1154 XML_Parser parser = XML_ParserCreate(NULL);
1155 enum XML_Status result;
1156 ctx.name = xcalloc(10, 1);
1157 ctx.len = 0;
1158 ctx.cdata = NULL;
1159 ctx.userFunc = handle_remote_ls_ctx;
1160 ctx.userData = &ls;
1161 XML_SetUserData(parser, &ctx);
1162 XML_SetElementHandler(parser, xml_start_tag,
1163 xml_end_tag);
1164 XML_SetCharacterDataHandler(parser, xml_cdata);
1165 result = XML_Parse(parser, in_buffer.buf,
1166 in_buffer.len, 1);
1167 free(ctx.name);
1168
1169 if (result != XML_STATUS_OK) {
1170 fprintf(stderr, "XML error: %s\n",
1171 XML_ErrorString(
1172 XML_GetErrorCode(parser)));
1173 }
1174 XML_ParserFree(parser);
1175 }
1176 } else {
1177 fprintf(stderr, "Unable to start PROPFIND request\n");
1178 }
1179
1180 free(ls.path);
1181 free(url);
1182 strbuf_release(&out_buffer.buf);
1183 strbuf_release(&in_buffer);
1184 curl_slist_free_all(dav_headers);
1185 }
1186
1187 static void get_remote_object_list(unsigned char parent)
1188 {
1189 char path[] = "objects/XX/";
1190 static const char hex[] = "0123456789abcdef";
1191 unsigned int val = parent;
1192
1193 path[8] = hex[val >> 4];
1194 path[9] = hex[val & 0xf];
1195 remote_dir_exists[val] = 0;
1196 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1197 process_ls_object, &val);
1198 }
1199
1200 static int locking_available(void)
1201 {
1202 struct active_request_slot *slot;
1203 struct slot_results results;
1204 struct strbuf in_buffer = STRBUF_INIT;
1205 struct buffer out_buffer = { STRBUF_INIT, 0 };
1206 struct curl_slist *dav_headers = NULL;
1207 struct xml_ctx ctx;
1208 int lock_flags = 0;
1209 char *escaped;
1210
1211 escaped = xml_entities(repo->url);
1212 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1213 free(escaped);
1214
1215 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1216 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1217
1218 slot = get_active_slot();
1219 slot->results = &results;
1220 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1221 &out_buffer, fwrite_buffer);
1222 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1223 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1224
1225 if (start_active_slot(slot)) {
1226 run_active_slot(slot);
1227 if (results.curl_result == CURLE_OK) {
1228 XML_Parser parser = XML_ParserCreate(NULL);
1229 enum XML_Status result;
1230 ctx.name = xcalloc(10, 1);
1231 ctx.len = 0;
1232 ctx.cdata = NULL;
1233 ctx.userFunc = handle_lockprop_ctx;
1234 ctx.userData = &lock_flags;
1235 XML_SetUserData(parser, &ctx);
1236 XML_SetElementHandler(parser, xml_start_tag,
1237 xml_end_tag);
1238 result = XML_Parse(parser, in_buffer.buf,
1239 in_buffer.len, 1);
1240 free(ctx.name);
1241
1242 if (result != XML_STATUS_OK) {
1243 fprintf(stderr, "XML error: %s\n",
1244 XML_ErrorString(
1245 XML_GetErrorCode(parser)));
1246 lock_flags = 0;
1247 }
1248 XML_ParserFree(parser);
1249 if (!lock_flags)
1250 error("no DAV locking support on %s",
1251 repo->url);
1252
1253 } else {
1254 error("Cannot access URL %s, return code %d",
1255 repo->url, results.curl_result);
1256 lock_flags = 0;
1257 }
1258 } else {
1259 error("Unable to start PROPFIND request on %s", repo->url);
1260 }
1261
1262 strbuf_release(&out_buffer.buf);
1263 strbuf_release(&in_buffer);
1264 curl_slist_free_all(dav_headers);
1265
1266 return lock_flags;
1267 }
1268
1269 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1270 {
1271 struct object_list *entry = xmalloc(sizeof(struct object_list));
1272 entry->item = obj;
1273 entry->next = *p;
1274 *p = entry;
1275 return &entry->next;
1276 }
1277
1278 static struct object_list **process_blob(struct blob *blob,
1279 struct object_list **p,
1280 struct name_path *path,
1281 const char *name)
1282 {
1283 struct object *obj = &blob->object;
1284
1285 obj->flags |= LOCAL;
1286
1287 if (obj->flags & (UNINTERESTING | SEEN))
1288 return p;
1289
1290 obj->flags |= SEEN;
1291 return add_one_object(obj, p);
1292 }
1293
1294 static struct object_list **process_tree(struct tree *tree,
1295 struct object_list **p,
1296 struct name_path *path,
1297 const char *name)
1298 {
1299 struct object *obj = &tree->object;
1300 struct tree_desc desc;
1301 struct name_entry entry;
1302 struct name_path me;
1303
1304 obj->flags |= LOCAL;
1305
1306 if (obj->flags & (UNINTERESTING | SEEN))
1307 return p;
1308 if (parse_tree(tree) < 0)
1309 die("bad tree object %s", sha1_to_hex(obj->sha1));
1310
1311 obj->flags |= SEEN;
1312 name = xstrdup(name);
1313 p = add_one_object(obj, p);
1314 me.up = path;
1315 me.elem = name;
1316 me.elem_len = strlen(name);
1317
1318 init_tree_desc(&desc, tree->buffer, tree->size);
1319
1320 while (tree_entry(&desc, &entry))
1321 switch (object_type(entry.mode)) {
1322 case OBJ_TREE:
1323 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1324 break;
1325 case OBJ_BLOB:
1326 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1327 break;
1328 default:
1329 /* Subproject commit - not in this repository */
1330 break;
1331 }
1332
1333 free_tree_buffer(tree);
1334 return p;
1335 }
1336
1337 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1338 {
1339 int i;
1340 struct commit *commit;
1341 struct object_list **p = &objects;
1342 int count = 0;
1343
1344 while ((commit = get_revision(revs)) != NULL) {
1345 p = process_tree(commit->tree, p, NULL, "");
1346 commit->object.flags |= LOCAL;
1347 if (!(commit->object.flags & UNINTERESTING))
1348 count += add_send_request(&commit->object, lock);
1349 }
1350
1351 for (i = 0; i < revs->pending.nr; i++) {
1352 struct object_array_entry *entry = revs->pending.objects + i;
1353 struct object *obj = entry->item;
1354 const char *name = entry->name;
1355
1356 if (obj->flags & (UNINTERESTING | SEEN))
1357 continue;
1358 if (obj->type == OBJ_TAG) {
1359 obj->flags |= SEEN;
1360 p = add_one_object(obj, p);
1361 continue;
1362 }
1363 if (obj->type == OBJ_TREE) {
1364 p = process_tree((struct tree *)obj, p, NULL, name);
1365 continue;
1366 }
1367 if (obj->type == OBJ_BLOB) {
1368 p = process_blob((struct blob *)obj, p, NULL, name);
1369 continue;
1370 }
1371 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1372 }
1373
1374 while (objects) {
1375 if (!(objects->item->flags & UNINTERESTING))
1376 count += add_send_request(objects->item, lock);
1377 objects = objects->next;
1378 }
1379
1380 return count;
1381 }
1382
1383 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1384 {
1385 struct active_request_slot *slot;
1386 struct slot_results results;
1387 struct buffer out_buffer = { STRBUF_INIT, 0 };
1388 struct curl_slist *dav_headers;
1389
1390 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1391
1392 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1393
1394 slot = get_active_slot();
1395 slot->results = &results;
1396 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1397 &out_buffer, fwrite_null);
1398 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1399
1400 if (start_active_slot(slot)) {
1401 run_active_slot(slot);
1402 strbuf_release(&out_buffer.buf);
1403 if (results.curl_result != CURLE_OK) {
1404 fprintf(stderr,
1405 "PUT error: curl result=%d, HTTP code=%ld\n",
1406 results.curl_result, results.http_code);
1407 /* We should attempt recovery? */
1408 return 0;
1409 }
1410 } else {
1411 strbuf_release(&out_buffer.buf);
1412 fprintf(stderr, "Unable to start PUT request\n");
1413 return 0;
1414 }
1415
1416 return 1;
1417 }
1418
1419 static struct ref *remote_refs;
1420
1421 static void one_remote_ref(const char *refname)
1422 {
1423 struct ref *ref;
1424 struct object *obj;
1425
1426 ref = alloc_ref(refname);
1427
1428 if (http_fetch_ref(repo->url, ref) != 0) {
1429 fprintf(stderr,
1430 "Unable to fetch ref %s from %s\n",
1431 refname, repo->url);
1432 free(ref);
1433 return;
1434 }
1435
1436 /*
1437 * Fetch a copy of the object if it doesn't exist locally - it
1438 * may be required for updating server info later.
1439 */
1440 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1441 obj = lookup_unknown_object(ref->old_sha1);
1442 if (obj) {
1443 fprintf(stderr, " fetch %s for %s\n",
1444 sha1_to_hex(ref->old_sha1), refname);
1445 add_fetch_request(obj);
1446 }
1447 }
1448
1449 ref->next = remote_refs;
1450 remote_refs = ref;
1451 }
1452
1453 static void get_dav_remote_heads(void)
1454 {
1455 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1456 }
1457
1458 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1459 {
1460 struct strbuf *buf = (struct strbuf *)ls->userData;
1461 struct object *o;
1462 struct ref *ref;
1463
1464 ref = alloc_ref(ls->dentry_name);
1465
1466 if (http_fetch_ref(repo->url, ref) != 0) {
1467 fprintf(stderr,
1468 "Unable to fetch ref %s from %s\n",
1469 ls->dentry_name, repo->url);
1470 aborted = 1;
1471 free(ref);
1472 return;
1473 }
1474
1475 o = parse_object(ref->old_sha1);
1476 if (!o) {
1477 fprintf(stderr,
1478 "Unable to parse object %s for remote ref %s\n",
1479 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1480 aborted = 1;
1481 free(ref);
1482 return;
1483 }
1484
1485 strbuf_addf(buf, "%s\t%s\n",
1486 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1487
1488 if (o->type == OBJ_TAG) {
1489 o = deref_tag(o, ls->dentry_name, 0);
1490 if (o)
1491 strbuf_addf(buf, "%s\t%s^{}\n",
1492 sha1_to_hex(o->sha1), ls->dentry_name);
1493 }
1494 free(ref);
1495 }
1496
1497 static void update_remote_info_refs(struct remote_lock *lock)
1498 {
1499 struct buffer buffer = { STRBUF_INIT, 0 };
1500 struct active_request_slot *slot;
1501 struct slot_results results;
1502 struct curl_slist *dav_headers;
1503
1504 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1505 add_remote_info_ref, &buffer.buf);
1506 if (!aborted) {
1507 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1508
1509 slot = get_active_slot();
1510 slot->results = &results;
1511 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1512 &buffer, fwrite_null);
1513 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1514
1515 if (start_active_slot(slot)) {
1516 run_active_slot(slot);
1517 if (results.curl_result != CURLE_OK) {
1518 fprintf(stderr,
1519 "PUT error: curl result=%d, HTTP code=%ld\n",
1520 results.curl_result, results.http_code);
1521 }
1522 }
1523 }
1524 strbuf_release(&buffer.buf);
1525 }
1526
1527 static int remote_exists(const char *path)
1528 {
1529 char *url = xstrfmt("%s%s", repo->url, path);
1530 int ret;
1531
1532
1533 switch (http_get_strbuf(url, NULL, NULL)) {
1534 case HTTP_OK:
1535 ret = 1;
1536 break;
1537 case HTTP_MISSING_TARGET:
1538 ret = 0;
1539 break;
1540 case HTTP_ERROR:
1541 error("unable to access '%s': %s", url, curl_errorstr);
1542 default:
1543 ret = -1;
1544 }
1545 free(url);
1546 return ret;
1547 }
1548
1549 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1550 {
1551 char *url = xstrfmt("%s%s", repo->url, path);
1552 struct strbuf buffer = STRBUF_INIT;
1553 const char *name;
1554
1555 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1556 die("Couldn't get %s for remote symref\n%s", url,
1557 curl_errorstr);
1558 free(url);
1559
1560 free(*symref);
1561 *symref = NULL;
1562 hashclr(sha1);
1563
1564 if (buffer.len == 0)
1565 return;
1566
1567 /* Cut off trailing newline. */
1568 strbuf_rtrim(&buffer);
1569
1570 /* If it's a symref, set the refname; otherwise try for a sha1 */
1571 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1572 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1573 } else {
1574 get_sha1_hex(buffer.buf, sha1);
1575 }
1576
1577 strbuf_release(&buffer);
1578 }
1579
1580 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1581 {
1582 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1583 struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1584
1585 return in_merge_bases(branch, head);
1586 }
1587
1588 static int delete_remote_branch(const char *pattern, int force)
1589 {
1590 struct ref *refs = remote_refs;
1591 struct ref *remote_ref = NULL;
1592 unsigned char head_sha1[20];
1593 char *symref = NULL;
1594 int match;
1595 int patlen = strlen(pattern);
1596 int i;
1597 struct active_request_slot *slot;
1598 struct slot_results results;
1599 char *url;
1600
1601 /* Find the remote branch(es) matching the specified branch name */
1602 for (match = 0; refs; refs = refs->next) {
1603 char *name = refs->name;
1604 int namelen = strlen(name);
1605 if (namelen < patlen ||
1606 memcmp(name + namelen - patlen, pattern, patlen))
1607 continue;
1608 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1609 continue;
1610 match++;
1611 remote_ref = refs;
1612 }
1613 if (match == 0)
1614 return error("No remote branch matches %s", pattern);
1615 if (match != 1)
1616 return error("More than one remote branch matches %s",
1617 pattern);
1618
1619 /*
1620 * Remote HEAD must be a symref (not exactly foolproof; a remote
1621 * symlink to a symref will look like a symref)
1622 */
1623 fetch_symref("HEAD", &symref, head_sha1);
1624 if (!symref)
1625 return error("Remote HEAD is not a symref");
1626
1627 /* Remote branch must not be the remote HEAD */
1628 for (i = 0; symref && i < MAXDEPTH; i++) {
1629 if (!strcmp(remote_ref->name, symref))
1630 return error("Remote branch %s is the current HEAD",
1631 remote_ref->name);
1632 fetch_symref(symref, &symref, head_sha1);
1633 }
1634
1635 /* Run extra sanity checks if delete is not forced */
1636 if (!force) {
1637 /* Remote HEAD must resolve to a known object */
1638 if (symref)
1639 return error("Remote HEAD symrefs too deep");
1640 if (is_null_sha1(head_sha1))
1641 return error("Unable to resolve remote HEAD");
1642 if (!has_sha1_file(head_sha1))
1643 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1644
1645 /* Remote branch must resolve to a known object */
1646 if (is_null_sha1(remote_ref->old_sha1))
1647 return error("Unable to resolve remote branch %s",
1648 remote_ref->name);
1649 if (!has_sha1_file(remote_ref->old_sha1))
1650 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));
1651
1652 /* Remote branch must be an ancestor of remote HEAD */
1653 if (!verify_merge_base(head_sha1, remote_ref)) {
1654 return error("The branch '%s' is not an ancestor "
1655 "of your current HEAD.\n"
1656 "If you are sure you want to delete it,"
1657 " run:\n\t'git http-push -D %s %s'",
1658 remote_ref->name, repo->url, pattern);
1659 }
1660 }
1661
1662 /* Send delete request */
1663 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1664 if (dry_run)
1665 return 0;
1666 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1667 slot = get_active_slot();
1668 slot->results = &results;
1669 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1670 if (start_active_slot(slot)) {
1671 run_active_slot(slot);
1672 free(url);
1673 if (results.curl_result != CURLE_OK)
1674 return error("DELETE request failed (%d/%ld)",
1675 results.curl_result, results.http_code);
1676 } else {
1677 free(url);
1678 return error("Unable to start DELETE request");
1679 }
1680
1681 return 0;
1682 }
1683
1684 static void run_request_queue(void)
1685 {
1686 #ifdef USE_CURL_MULTI
1687 is_running_queue = 1;
1688 fill_active_slots();
1689 add_fill_function(NULL, fill_active_slot);
1690 #endif
1691 do {
1692 finish_all_active_slots();
1693 #ifdef USE_CURL_MULTI
1694 fill_active_slots();
1695 #endif
1696 } while (request_queue_head && !aborted);
1697
1698 #ifdef USE_CURL_MULTI
1699 is_running_queue = 0;
1700 #endif
1701 }
1702
1703 int main(int argc, char **argv)
1704 {
1705 struct transfer_request *request;
1706 struct transfer_request *next_request;
1707 int nr_refspec = 0;
1708 char **refspec = NULL;
1709 struct remote_lock *ref_lock = NULL;
1710 struct remote_lock *info_ref_lock = NULL;
1711 struct rev_info revs;
1712 int delete_branch = 0;
1713 int force_delete = 0;
1714 int objects_to_send;
1715 int rc = 0;
1716 int i;
1717 int new_refs;
1718 struct ref *ref, *local_refs;
1719
1720 git_setup_gettext();
1721
1722 git_extract_argv0_path(argv[0]);
1723
1724 repo = xcalloc(1, sizeof(*repo));
1725
1726 argv++;
1727 for (i = 1; i < argc; i++, argv++) {
1728 char *arg = *argv;
1729
1730 if (*arg == '-') {
1731 if (!strcmp(arg, "--all")) {
1732 push_all = MATCH_REFS_ALL;
1733 continue;
1734 }
1735 if (!strcmp(arg, "--force")) {
1736 force_all = 1;
1737 continue;
1738 }
1739 if (!strcmp(arg, "--dry-run")) {
1740 dry_run = 1;
1741 continue;
1742 }
1743 if (!strcmp(arg, "--helper-status")) {
1744 helper_status = 1;
1745 continue;
1746 }
1747 if (!strcmp(arg, "--verbose")) {
1748 push_verbosely = 1;
1749 http_is_verbose = 1;
1750 continue;
1751 }
1752 if (!strcmp(arg, "-d")) {
1753 delete_branch = 1;
1754 continue;
1755 }
1756 if (!strcmp(arg, "-D")) {
1757 delete_branch = 1;
1758 force_delete = 1;
1759 continue;
1760 }
1761 if (!strcmp(arg, "-h"))
1762 usage(http_push_usage);
1763 }
1764 if (!repo->url) {
1765 char *path = strstr(arg, "//");
1766 str_end_url_with_slash(arg, &repo->url);
1767 repo->path_len = strlen(repo->url);
1768 if (path) {
1769 repo->path = strchr(path+2, '/');
1770 if (repo->path)
1771 repo->path_len = strlen(repo->path);
1772 }
1773 continue;
1774 }
1775 refspec = argv;
1776 nr_refspec = argc - i;
1777 break;
1778 }
1779
1780 #ifndef USE_CURL_MULTI
1781 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1782 #endif
1783
1784 if (!repo->url)
1785 usage(http_push_usage);
1786
1787 if (delete_branch && nr_refspec != 1)
1788 die("You must specify only one branch name when deleting a remote branch");
1789
1790 setup_git_directory();
1791
1792 memset(remote_dir_exists, -1, 256);
1793
1794 http_init(NULL, repo->url, 1);
1795
1796 #ifdef USE_CURL_MULTI
1797 is_running_queue = 0;
1798 #endif
1799
1800 /* Verify DAV compliance/lock support */
1801 if (!locking_available()) {
1802 rc = 1;
1803 goto cleanup;
1804 }
1805
1806 sigchain_push_common(remove_locks_on_signal);
1807
1808 /* Check whether the remote has server info files */
1809 repo->can_update_info_refs = 0;
1810 repo->has_info_refs = remote_exists("info/refs");
1811 repo->has_info_packs = remote_exists("objects/info/packs");
1812 if (repo->has_info_refs) {
1813 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1814 if (info_ref_lock)
1815 repo->can_update_info_refs = 1;
1816 else {
1817 error("cannot lock existing info/refs");
1818 rc = 1;
1819 goto cleanup;
1820 }
1821 }
1822 if (repo->has_info_packs)
1823 fetch_indices();
1824
1825 /* Get a list of all local and remote heads to validate refspecs */
1826 local_refs = get_local_heads();
1827 fprintf(stderr, "Fetching remote heads...\n");
1828 get_dav_remote_heads();
1829 run_request_queue();
1830
1831 /* Remove a remote branch if -d or -D was specified */
1832 if (delete_branch) {
1833 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1834 fprintf(stderr, "Unable to delete remote branch %s\n",
1835 refspec[0]);
1836 if (helper_status)
1837 printf("error %s cannot remove\n", refspec[0]);
1838 }
1839 goto cleanup;
1840 }
1841
1842 /* match them up */
1843 if (match_push_refs(local_refs, &remote_refs,
1844 nr_refspec, (const char **) refspec, push_all)) {
1845 rc = -1;
1846 goto cleanup;
1847 }
1848 if (!remote_refs) {
1849 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1850 if (helper_status)
1851 printf("error null no match\n");
1852 rc = 0;
1853 goto cleanup;
1854 }
1855
1856 new_refs = 0;
1857 for (ref = remote_refs; ref; ref = ref->next) {
1858 char old_hex[60], *new_hex;
1859 const char *commit_argv[5];
1860 int commit_argc;
1861 char *new_sha1_hex, *old_sha1_hex;
1862
1863 if (!ref->peer_ref)
1864 continue;
1865
1866 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1867 if (delete_remote_branch(ref->name, 1) == -1) {
1868 error("Could not remove %s", ref->name);
1869 if (helper_status)
1870 printf("error %s cannot remove\n", ref->name);
1871 rc = -4;
1872 }
1873 else if (helper_status)
1874 printf("ok %s\n", ref->name);
1875 new_refs++;
1876 continue;
1877 }
1878
1879 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1880 if (push_verbosely)
1881 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1882 if (helper_status)
1883 printf("ok %s up to date\n", ref->name);
1884 continue;
1885 }
1886
1887 if (!force_all &&
1888 !is_null_sha1(ref->old_sha1) &&
1889 !ref->force) {
1890 if (!has_sha1_file(ref->old_sha1) ||
1891 !ref_newer(ref->peer_ref->new_sha1,
1892 ref->old_sha1)) {
1893 /*
1894 * We do not have the remote ref, or
1895 * we know that the remote ref is not
1896 * an ancestor of what we are trying to
1897 * push. Either way this can be losing
1898 * commits at the remote end and likely
1899 * we were not up to date to begin with.
1900 */
1901 error("remote '%s' is not an ancestor of\n"
1902 "local '%s'.\n"
1903 "Maybe you are not up-to-date and "
1904 "need to pull first?",
1905 ref->name,
1906 ref->peer_ref->name);
1907 if (helper_status)
1908 printf("error %s non-fast forward\n", ref->name);
1909 rc = -2;
1910 continue;
1911 }
1912 }
1913 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1914 new_refs++;
1915 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1916 new_hex = sha1_to_hex(ref->new_sha1);
1917
1918 fprintf(stderr, "updating '%s'", ref->name);
1919 if (strcmp(ref->name, ref->peer_ref->name))
1920 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1921 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1922 if (dry_run) {
1923 if (helper_status)
1924 printf("ok %s\n", ref->name);
1925 continue;
1926 }
1927
1928 /* Lock remote branch ref */
1929 ref_lock = lock_remote(ref->name, LOCK_TIME);
1930 if (ref_lock == NULL) {
1931 fprintf(stderr, "Unable to lock remote branch %s\n",
1932 ref->name);
1933 if (helper_status)
1934 printf("error %s lock error\n", ref->name);
1935 rc = 1;
1936 continue;
1937 }
1938
1939 /* Set up revision info for this refspec */
1940 commit_argc = 3;
1941 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1942 old_sha1_hex = NULL;
1943 commit_argv[1] = "--objects";
1944 commit_argv[2] = new_sha1_hex;
1945 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1946 old_sha1_hex = xmalloc(42);
1947 sprintf(old_sha1_hex, "^%s",
1948 sha1_to_hex(ref->old_sha1));
1949 commit_argv[3] = old_sha1_hex;
1950 commit_argc++;
1951 }
1952 commit_argv[commit_argc] = NULL;
1953 init_revisions(&revs, setup_git_directory());
1954 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1955 revs.edge_hint = 0; /* just in case */
1956 free(new_sha1_hex);
1957 if (old_sha1_hex) {
1958 free(old_sha1_hex);
1959 commit_argv[1] = NULL;
1960 }
1961
1962 /* Generate a list of objects that need to be pushed */
1963 pushing = 0;
1964 if (prepare_revision_walk(&revs))
1965 die("revision walk setup failed");
1966 mark_edges_uninteresting(&revs, NULL);
1967 objects_to_send = get_delta(&revs, ref_lock);
1968 finish_all_active_slots();
1969
1970 /* Push missing objects to remote, this would be a
1971 convenient time to pack them first if appropriate. */
1972 pushing = 1;
1973 if (objects_to_send)
1974 fprintf(stderr, " sending %d objects\n",
1975 objects_to_send);
1976
1977 run_request_queue();
1978
1979 /* Update the remote branch if all went well */
1980 if (aborted || !update_remote(ref->new_sha1, ref_lock))
1981 rc = 1;
1982
1983 if (!rc)
1984 fprintf(stderr, " done\n");
1985 if (helper_status)
1986 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1987 unlock_remote(ref_lock);
1988 check_locks();
1989 }
1990
1991 /* Update remote server info if appropriate */
1992 if (repo->has_info_refs && new_refs) {
1993 if (info_ref_lock && repo->can_update_info_refs) {
1994 fprintf(stderr, "Updating remote server info\n");
1995 if (!dry_run)
1996 update_remote_info_refs(info_ref_lock);
1997 } else {
1998 fprintf(stderr, "Unable to update server info\n");
1999 }
2000 }
2001
2002 cleanup:
2003 if (info_ref_lock)
2004 unlock_remote(info_ref_lock);
2005 free(repo);
2006
2007 http_cleanup();
2008
2009 request = request_queue_head;
2010 while (request != NULL) {
2011 next_request = request->next;
2012 release_request(request);
2013 request = next_request;
2014 }
2015
2016 return rc;
2017 }