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Make fetch-pack a builtin with an internal API
[git/mingw.git] / http-push.c
blob8e1fdfddf5402add6b6ce787647c522c9a0116ae
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78 static struct curl_slist *default_headers;
79
80 static int push_verbosely;
81 static int push_all;
82 static int force_all;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 filename);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 request->buffer.buffer = xmalloc(size);
498
499 /* Compress it */
500 stream.next_out = request->buffer.buffer;
501 stream.avail_out = size;
502
503 /* First header.. */
504 stream.next_in = (void *)hdr;
505 stream.avail_in = hdrlen;
506 while (deflate(&stream, 0) == Z_OK)
507 /* nothing */;
508
509 /* Then the data itself.. */
510 stream.next_in = unpacked;
511 stream.avail_in = len;
512 while (deflate(&stream, Z_FINISH) == Z_OK)
513 /* nothing */;
514 deflateEnd(&stream);
515 free(unpacked);
516
517 request->buffer.size = stream.total_out;
518 request->buffer.posn = 0;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 if (request->url != NULL)
668 free(request->url);
669 free(request);
670 }
671
672 static void finish_request(struct transfer_request *request)
673 {
674 struct stat st;
675 struct packed_git *target;
676 struct packed_git **lst;
677
678 request->curl_result = request->slot->curl_result;
679 request->http_code = request->slot->http_code;
680 request->slot = NULL;
681
682 /* Keep locks active */
683 check_locks();
684
685 if (request->headers != NULL)
686 curl_slist_free_all(request->headers);
687
688 /* URL is reused for MOVE after PUT */
689 if (request->state != RUN_PUT) {
690 free(request->url);
691 request->url = NULL;
692 }
693
694 if (request->state == RUN_MKCOL) {
695 if (request->curl_result == CURLE_OK ||
696 request->http_code == 405) {
697 remote_dir_exists[request->obj->sha1[0]] = 1;
698 start_put(request);
699 } else {
700 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
701 sha1_to_hex(request->obj->sha1),
702 request->curl_result, request->http_code);
703 request->state = ABORTED;
704 aborted = 1;
705 }
706 } else if (request->state == RUN_PUT) {
707 if (request->curl_result == CURLE_OK) {
708 start_move(request);
709 } else {
710 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
711 sha1_to_hex(request->obj->sha1),
712 request->curl_result, request->http_code);
713 request->state = ABORTED;
714 aborted = 1;
715 }
716 } else if (request->state == RUN_MOVE) {
717 if (request->curl_result == CURLE_OK) {
718 if (push_verbosely)
719 fprintf(stderr, " sent %s\n",
720 sha1_to_hex(request->obj->sha1));
721 request->obj->flags |= REMOTE;
722 release_request(request);
723 } else {
724 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_FETCH_LOOSE) {
731 fchmod(request->local_fileno, 0444);
732 close(request->local_fileno); request->local_fileno = -1;
733
734 if (request->curl_result != CURLE_OK &&
735 request->http_code != 416) {
736 if (stat(request->tmpfile, &st) == 0) {
737 if (st.st_size == 0)
738 unlink(request->tmpfile);
739 }
740 } else {
741 if (request->http_code == 416)
742 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
743
744 inflateEnd(&request->stream);
745 SHA1_Final(request->real_sha1, &request->c);
746 if (request->zret != Z_STREAM_END) {
747 unlink(request->tmpfile);
748 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
749 unlink(request->tmpfile);
750 } else {
751 request->rename =
752 move_temp_to_file(
753 request->tmpfile,
754 request->filename);
755 if (request->rename == 0) {
756 request->obj->flags |= (LOCAL | REMOTE);
757 }
758 }
759 }
760
761 /* Try fetching packed if necessary */
762 if (request->obj->flags & LOCAL)
763 release_request(request);
764 else
765 start_fetch_packed(request);
766
767 } else if (request->state == RUN_FETCH_PACKED) {
768 if (request->curl_result != CURLE_OK) {
769 fprintf(stderr, "Unable to get pack file %s\n%s",
770 request->url, curl_errorstr);
771 remote->can_update_info_refs = 0;
772 } else {
773 off_t pack_size = ftell(request->local_stream);
774
775 fclose(request->local_stream);
776 request->local_stream = NULL;
777 if (!move_temp_to_file(request->tmpfile,
778 request->filename)) {
779 target = (struct packed_git *)request->userData;
780 target->pack_size = pack_size;
781 lst = &remote->packs;
782 while (*lst != target)
783 lst = &((*lst)->next);
784 *lst = (*lst)->next;
785
786 if (!verify_pack(target, 0))
787 install_packed_git(target);
788 else
789 remote->can_update_info_refs = 0;
790 }
791 }
792 release_request(request);
793 }
794 }
795
796 #ifdef USE_CURL_MULTI
797 static int fill_active_slot(void *unused)
798 {
799 struct transfer_request *request = request_queue_head;
800
801 if (aborted)
802 return 0;
803
804 for (request = request_queue_head; request; request = request->next) {
805 if (request->state == NEED_FETCH) {
806 start_fetch_loose(request);
807 return 1;
808 } else if (pushing && request->state == NEED_PUSH) {
809 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
810 start_put(request);
811 } else {
812 start_mkcol(request);
813 }
814 return 1;
815 }
816 }
817 return 0;
818 }
819 #endif
820
821 static void get_remote_object_list(unsigned char parent);
822
823 static void add_fetch_request(struct object *obj)
824 {
825 struct transfer_request *request;
826
827 check_locks();
828
829 /*
830 * Don't fetch the object if it's known to exist locally
831 * or is already in the request queue
832 */
833 if (remote_dir_exists[obj->sha1[0]] == -1)
834 get_remote_object_list(obj->sha1[0]);
835 if (obj->flags & (LOCAL | FETCHING))
836 return;
837
838 obj->flags |= FETCHING;
839 request = xmalloc(sizeof(*request));
840 request->obj = obj;
841 request->url = NULL;
842 request->lock = NULL;
843 request->headers = NULL;
844 request->local_fileno = -1;
845 request->local_stream = NULL;
846 request->state = NEED_FETCH;
847 request->next = request_queue_head;
848 request_queue_head = request;
849
850 #ifdef USE_CURL_MULTI
851 fill_active_slots();
852 step_active_slots();
853 #endif
854 }
855
856 static int add_send_request(struct object *obj, struct remote_lock *lock)
857 {
858 struct transfer_request *request = request_queue_head;
859 struct packed_git *target;
860
861 /* Keep locks active */
862 check_locks();
863
864 /*
865 * Don't push the object if it's known to exist on the remote
866 * or is already in the request queue
867 */
868 if (remote_dir_exists[obj->sha1[0]] == -1)
869 get_remote_object_list(obj->sha1[0]);
870 if (obj->flags & (REMOTE | PUSHING))
871 return 0;
872 target = find_sha1_pack(obj->sha1, remote->packs);
873 if (target) {
874 obj->flags |= REMOTE;
875 return 0;
876 }
877
878 obj->flags |= PUSHING;
879 request = xmalloc(sizeof(*request));
880 request->obj = obj;
881 request->url = NULL;
882 request->lock = lock;
883 request->headers = NULL;
884 request->local_fileno = -1;
885 request->local_stream = NULL;
886 request->state = NEED_PUSH;
887 request->next = request_queue_head;
888 request_queue_head = request;
889
890 #ifdef USE_CURL_MULTI
891 fill_active_slots();
892 step_active_slots();
893 #endif
894
895 return 1;
896 }
897
898 static int fetch_index(unsigned char *sha1)
899 {
900 char *hex = sha1_to_hex(sha1);
901 char *filename;
902 char *url;
903 char tmpfile[PATH_MAX];
904 long prev_posn = 0;
905 char range[RANGE_HEADER_SIZE];
906 struct curl_slist *range_header = NULL;
907
908 FILE *indexfile;
909 struct active_request_slot *slot;
910 struct slot_results results;
911
912 /* Don't use the index if the pack isn't there */
913 url = xmalloc(strlen(remote->url) + 64);
914 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
915 slot = get_active_slot();
916 slot->results = &results;
917 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
918 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
919 if (start_active_slot(slot)) {
920 run_active_slot(slot);
921 if (results.curl_result != CURLE_OK) {
922 free(url);
923 return error("Unable to verify pack %s is available",
924 hex);
925 }
926 } else {
927 return error("Unable to start request");
928 }
929
930 if (has_pack_index(sha1))
931 return 0;
932
933 if (push_verbosely)
934 fprintf(stderr, "Getting index for pack %s\n", hex);
935
936 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
937
938 filename = sha1_pack_index_name(sha1);
939 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
940 indexfile = fopen(tmpfile, "a");
941 if (!indexfile)
942 return error("Unable to open local file %s for pack index",
943 filename);
944
945 slot = get_active_slot();
946 slot->results = &results;
947 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
948 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
949 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
950 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
951 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
952 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
953 slot->local = indexfile;
954
955 /* If there is data present from a previous transfer attempt,
956 resume where it left off */
957 prev_posn = ftell(indexfile);
958 if (prev_posn>0) {
959 if (push_verbosely)
960 fprintf(stderr,
961 "Resuming fetch of index for pack %s at byte %ld\n",
962 hex, prev_posn);
963 sprintf(range, "Range: bytes=%ld-", prev_posn);
964 range_header = curl_slist_append(range_header, range);
965 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
966 }
967
968 if (start_active_slot(slot)) {
969 run_active_slot(slot);
970 if (results.curl_result != CURLE_OK) {
971 free(url);
972 fclose(indexfile);
973 return error("Unable to get pack index %s\n%s", url,
974 curl_errorstr);
975 }
976 } else {
977 free(url);
978 fclose(indexfile);
979 return error("Unable to start request");
980 }
981
982 free(url);
983 fclose(indexfile);
984
985 return move_temp_to_file(tmpfile, filename);
986 }
987
988 static int setup_index(unsigned char *sha1)
989 {
990 struct packed_git *new_pack;
991
992 if (fetch_index(sha1))
993 return -1;
994
995 new_pack = parse_pack_index(sha1);
996 new_pack->next = remote->packs;
997 remote->packs = new_pack;
998 return 0;
999 }
1000
1001 static int fetch_indices(void)
1002 {
1003 unsigned char sha1[20];
1004 char *url;
1005 struct buffer buffer;
1006 char *data;
1007 int i = 0;
1008
1009 struct active_request_slot *slot;
1010 struct slot_results results;
1011
1012 data = xcalloc(1, 4096);
1013 buffer.size = 4096;
1014 buffer.posn = 0;
1015 buffer.buffer = data;
1016
1017 if (push_verbosely)
1018 fprintf(stderr, "Getting pack list\n");
1019
1020 url = xmalloc(strlen(remote->url) + 20);
1021 sprintf(url, "%sobjects/info/packs", remote->url);
1022
1023 slot = get_active_slot();
1024 slot->results = &results;
1025 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1026 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1028 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1029 if (start_active_slot(slot)) {
1030 run_active_slot(slot);
1031 if (results.curl_result != CURLE_OK) {
1032 free(buffer.buffer);
1033 free(url);
1034 if (results.http_code == 404)
1035 return 0;
1036 else
1037 return error("%s", curl_errorstr);
1038 }
1039 } else {
1040 free(buffer.buffer);
1041 free(url);
1042 return error("Unable to start request");
1043 }
1044 free(url);
1045
1046 data = buffer.buffer;
1047 while (i < buffer.posn) {
1048 switch (data[i]) {
1049 case 'P':
1050 i++;
1051 if (i + 52 < buffer.posn &&
1052 !prefixcmp(data + i, " pack-") &&
1053 !prefixcmp(data + i + 46, ".pack\n")) {
1054 get_sha1_hex(data + i + 6, sha1);
1055 setup_index(sha1);
1056 i += 51;
1057 break;
1058 }
1059 default:
1060 while (data[i] != '\n')
1061 i++;
1062 }
1063 i++;
1064 }
1065
1066 free(buffer.buffer);
1067 return 0;
1068 }
1069
1070 static inline int needs_quote(int ch)
1071 {
1072 if (((ch >= 'A') && (ch <= 'Z'))
1073 || ((ch >= 'a') && (ch <= 'z'))
1074 || ((ch >= '0') && (ch <= '9'))
1075 || (ch == '/')
1076 || (ch == '-')
1077 || (ch == '.'))
1078 return 0;
1079 return 1;
1080 }
1081
1082 static inline int hex(int v)
1083 {
1084 if (v < 10) return '0' + v;
1085 else return 'A' + v - 10;
1086 }
1087
1088 static char *quote_ref_url(const char *base, const char *ref)
1089 {
1090 const char *cp;
1091 char *dp, *qref;
1092 int len, baselen, ch;
1093
1094 baselen = strlen(base);
1095 len = baselen + 1;
1096 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1097 if (needs_quote(ch))
1098 len += 2; /* extra two hex plus replacement % */
1099 qref = xmalloc(len);
1100 memcpy(qref, base, baselen);
1101 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1102 if (needs_quote(ch)) {
1103 *dp++ = '%';
1104 *dp++ = hex((ch >> 4) & 0xF);
1105 *dp++ = hex(ch & 0xF);
1106 }
1107 else
1108 *dp++ = ch;
1109 }
1110 *dp = 0;
1111
1112 return qref;
1113 }
1114
1115 int fetch_ref(char *ref, unsigned char *sha1)
1116 {
1117 char *url;
1118 char hex[42];
1119 struct buffer buffer;
1120 char *base = remote->url;
1121 struct active_request_slot *slot;
1122 struct slot_results results;
1123 buffer.size = 41;
1124 buffer.posn = 0;
1125 buffer.buffer = hex;
1126 hex[41] = '\0';
1127
1128 url = quote_ref_url(base, ref);
1129 slot = get_active_slot();
1130 slot->results = &results;
1131 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1132 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1133 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1134 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1135 if (start_active_slot(slot)) {
1136 run_active_slot(slot);
1137 if (results.curl_result != CURLE_OK)
1138 return error("Couldn't get %s for %s\n%s",
1139 url, ref, curl_errorstr);
1140 } else {
1141 return error("Unable to start request");
1142 }
1143
1144 hex[40] = '\0';
1145 get_sha1_hex(hex, sha1);
1146 return 0;
1147 }
1148
1149 static void one_remote_object(const char *hex)
1150 {
1151 unsigned char sha1[20];
1152 struct object *obj;
1153
1154 if (get_sha1_hex(hex, sha1) != 0)
1155 return;
1156
1157 obj = lookup_object(sha1);
1158 if (!obj)
1159 obj = parse_object(sha1);
1160
1161 /* Ignore remote objects that don't exist locally */
1162 if (!obj)
1163 return;
1164
1165 obj->flags |= REMOTE;
1166 if (!object_list_contains(objects, obj))
1167 object_list_insert(obj, &objects);
1168 }
1169
1170 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1171 {
1172 int *lock_flags = (int *)ctx->userData;
1173
1174 if (tag_closed) {
1175 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1176 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1177 (*lock_flags & DAV_PROP_LOCKWR)) {
1178 *lock_flags |= DAV_LOCK_OK;
1179 }
1180 *lock_flags &= DAV_LOCK_OK;
1181 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1182 *lock_flags |= DAV_PROP_LOCKWR;
1183 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1184 *lock_flags |= DAV_PROP_LOCKEX;
1185 }
1186 }
1187 }
1188
1189 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1190 {
1191 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1192
1193 if (tag_closed && ctx->cdata) {
1194 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1195 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1196 strcpy(lock->owner, ctx->cdata);
1197 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1198 if (!prefixcmp(ctx->cdata, "Second-"))
1199 lock->timeout =
1200 strtol(ctx->cdata + 7, NULL, 10);
1201 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1202 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1203 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1204 strcpy(lock->token, ctx->cdata + 16);
1205 }
1206 }
1207 }
1208 }
1209
1210 static void one_remote_ref(char *refname);
1211
1212 static void
1213 xml_start_tag(void *userData, const char *name, const char **atts)
1214 {
1215 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1216 const char *c = strchr(name, ':');
1217 int new_len;
1218
1219 if (c == NULL)
1220 c = name;
1221 else
1222 c++;
1223
1224 new_len = strlen(ctx->name) + strlen(c) + 2;
1225
1226 if (new_len > ctx->len) {
1227 ctx->name = xrealloc(ctx->name, new_len);
1228 ctx->len = new_len;
1229 }
1230 strcat(ctx->name, ".");
1231 strcat(ctx->name, c);
1232
1233 free(ctx->cdata);
1234 ctx->cdata = NULL;
1235
1236 ctx->userFunc(ctx, 0);
1237 }
1238
1239 static void
1240 xml_end_tag(void *userData, const char *name)
1241 {
1242 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1243 const char *c = strchr(name, ':');
1244 char *ep;
1245
1246 ctx->userFunc(ctx, 1);
1247
1248 if (c == NULL)
1249 c = name;
1250 else
1251 c++;
1252
1253 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1254 *ep = 0;
1255 }
1256
1257 static void
1258 xml_cdata(void *userData, const XML_Char *s, int len)
1259 {
1260 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1261 free(ctx->cdata);
1262 ctx->cdata = xmalloc(len + 1);
1263 /* NB: 's' is not null-terminated, can not use strlcpy here */
1264 memcpy(ctx->cdata, s, len);
1265 ctx->cdata[len] = '\0';
1266 }
1267
1268 static struct remote_lock *lock_remote(const char *path, long timeout)
1269 {
1270 struct active_request_slot *slot;
1271 struct slot_results results;
1272 struct buffer out_buffer;
1273 struct buffer in_buffer;
1274 char *out_data;
1275 char *in_data;
1276 char *url;
1277 char *ep;
1278 char timeout_header[25];
1279 struct remote_lock *lock = NULL;
1280 XML_Parser parser = XML_ParserCreate(NULL);
1281 enum XML_Status result;
1282 struct curl_slist *dav_headers = NULL;
1283 struct xml_ctx ctx;
1284
1285 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1286 sprintf(url, "%s%s", remote->url, path);
1287
1288 /* Make sure leading directories exist for the remote ref */
1289 ep = strchr(url + strlen(remote->url) + 1, '/');
1290 while (ep) {
1291 *ep = 0;
1292 slot = get_active_slot();
1293 slot->results = &results;
1294 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1295 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1296 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1297 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1298 if (start_active_slot(slot)) {
1299 run_active_slot(slot);
1300 if (results.curl_result != CURLE_OK &&
1301 results.http_code != 405) {
1302 fprintf(stderr,
1303 "Unable to create branch path %s\n",
1304 url);
1305 free(url);
1306 return NULL;
1307 }
1308 } else {
1309 fprintf(stderr, "Unable to start MKCOL request\n");
1310 free(url);
1311 return NULL;
1312 }
1313 *ep = '/';
1314 ep = strchr(ep + 1, '/');
1315 }
1316
1317 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1318 out_data = xmalloc(out_buffer.size + 1);
1319 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1320 out_buffer.posn = 0;
1321 out_buffer.buffer = out_data;
1322
1323 in_buffer.size = 4096;
1324 in_data = xmalloc(in_buffer.size);
1325 in_buffer.posn = 0;
1326 in_buffer.buffer = in_data;
1327
1328 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1329 dav_headers = curl_slist_append(dav_headers, timeout_header);
1330 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1331
1332 slot = get_active_slot();
1333 slot->results = &results;
1334 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1335 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1336 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1337 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1338 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1339 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1340 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1341 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1342 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1343
1344 lock = xcalloc(1, sizeof(*lock));
1345 lock->timeout = -1;
1346
1347 if (start_active_slot(slot)) {
1348 run_active_slot(slot);
1349 if (results.curl_result == CURLE_OK) {
1350 ctx.name = xcalloc(10, 1);
1351 ctx.len = 0;
1352 ctx.cdata = NULL;
1353 ctx.userFunc = handle_new_lock_ctx;
1354 ctx.userData = lock;
1355 XML_SetUserData(parser, &ctx);
1356 XML_SetElementHandler(parser, xml_start_tag,
1357 xml_end_tag);
1358 XML_SetCharacterDataHandler(parser, xml_cdata);
1359 result = XML_Parse(parser, in_buffer.buffer,
1360 in_buffer.posn, 1);
1361 free(ctx.name);
1362 if (result != XML_STATUS_OK) {
1363 fprintf(stderr, "XML error: %s\n",
1364 XML_ErrorString(
1365 XML_GetErrorCode(parser)));
1366 lock->timeout = -1;
1367 }
1368 }
1369 } else {
1370 fprintf(stderr, "Unable to start LOCK request\n");
1371 }
1372
1373 curl_slist_free_all(dav_headers);
1374 free(out_data);
1375 free(in_data);
1376
1377 if (lock->token == NULL || lock->timeout <= 0) {
1378 if (lock->token != NULL)
1379 free(lock->token);
1380 if (lock->owner != NULL)
1381 free(lock->owner);
1382 free(url);
1383 free(lock);
1384 lock = NULL;
1385 } else {
1386 lock->url = url;
1387 lock->start_time = time(NULL);
1388 lock->next = remote->locks;
1389 remote->locks = lock;
1390 }
1391
1392 return lock;
1393 }
1394
1395 static int unlock_remote(struct remote_lock *lock)
1396 {
1397 struct active_request_slot *slot;
1398 struct slot_results results;
1399 struct remote_lock *prev = remote->locks;
1400 char *lock_token_header;
1401 struct curl_slist *dav_headers = NULL;
1402 int rc = 0;
1403
1404 lock_token_header = xmalloc(strlen(lock->token) + 31);
1405 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1406 lock->token);
1407 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1408
1409 slot = get_active_slot();
1410 slot->results = &results;
1411 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1412 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1413 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1414 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1415
1416 if (start_active_slot(slot)) {
1417 run_active_slot(slot);
1418 if (results.curl_result == CURLE_OK)
1419 rc = 1;
1420 else
1421 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1422 results.http_code);
1423 } else {
1424 fprintf(stderr, "Unable to start UNLOCK request\n");
1425 }
1426
1427 curl_slist_free_all(dav_headers);
1428 free(lock_token_header);
1429
1430 if (remote->locks == lock) {
1431 remote->locks = lock->next;
1432 } else {
1433 while (prev && prev->next != lock)
1434 prev = prev->next;
1435 if (prev)
1436 prev->next = prev->next->next;
1437 }
1438
1439 if (lock->owner != NULL)
1440 free(lock->owner);
1441 free(lock->url);
1442 free(lock->token);
1443 free(lock);
1444
1445 return rc;
1446 }
1447
1448 static void remote_ls(const char *path, int flags,
1449 void (*userFunc)(struct remote_ls_ctx *ls),
1450 void *userData);
1451
1452 static void process_ls_object(struct remote_ls_ctx *ls)
1453 {
1454 unsigned int *parent = (unsigned int *)ls->userData;
1455 char *path = ls->dentry_name;
1456 char *obj_hex;
1457
1458 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1459 remote_dir_exists[*parent] = 1;
1460 return;
1461 }
1462
1463 if (strlen(path) != 49)
1464 return;
1465 path += 8;
1466 obj_hex = xmalloc(strlen(path));
1467 /* NB: path is not null-terminated, can not use strlcpy here */
1468 memcpy(obj_hex, path, 2);
1469 strcpy(obj_hex + 2, path + 3);
1470 one_remote_object(obj_hex);
1471 free(obj_hex);
1472 }
1473
1474 static void process_ls_ref(struct remote_ls_ctx *ls)
1475 {
1476 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1477 fprintf(stderr, " %s\n", ls->dentry_name);
1478 return;
1479 }
1480
1481 if (!(ls->dentry_flags & IS_DIR))
1482 one_remote_ref(ls->dentry_name);
1483 }
1484
1485 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1486 {
1487 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1488
1489 if (tag_closed) {
1490 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1491 if (ls->dentry_flags & IS_DIR) {
1492 if (ls->flags & PROCESS_DIRS) {
1493 ls->userFunc(ls);
1494 }
1495 if (strcmp(ls->dentry_name, ls->path) &&
1496 ls->flags & RECURSIVE) {
1497 remote_ls(ls->dentry_name,
1498 ls->flags,
1499 ls->userFunc,
1500 ls->userData);
1501 }
1502 } else if (ls->flags & PROCESS_FILES) {
1503 ls->userFunc(ls);
1504 }
1505 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1506 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1507 remote->path_len + 1);
1508 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1509 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1510 ls->dentry_flags |= IS_DIR;
1511 }
1512 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1513 free(ls->dentry_name);
1514 ls->dentry_name = NULL;
1515 ls->dentry_flags = 0;
1516 }
1517 }
1518
1519 static void remote_ls(const char *path, int flags,
1520 void (*userFunc)(struct remote_ls_ctx *ls),
1521 void *userData)
1522 {
1523 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1524 struct active_request_slot *slot;
1525 struct slot_results results;
1526 struct buffer in_buffer;
1527 struct buffer out_buffer;
1528 char *in_data;
1529 char *out_data;
1530 XML_Parser parser = XML_ParserCreate(NULL);
1531 enum XML_Status result;
1532 struct curl_slist *dav_headers = NULL;
1533 struct xml_ctx ctx;
1534 struct remote_ls_ctx ls;
1535
1536 ls.flags = flags;
1537 ls.path = xstrdup(path);
1538 ls.dentry_name = NULL;
1539 ls.dentry_flags = 0;
1540 ls.userData = userData;
1541 ls.userFunc = userFunc;
1542
1543 sprintf(url, "%s%s", remote->url, path);
1544
1545 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1546 out_data = xmalloc(out_buffer.size + 1);
1547 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1548 out_buffer.posn = 0;
1549 out_buffer.buffer = out_data;
1550
1551 in_buffer.size = 4096;
1552 in_data = xmalloc(in_buffer.size);
1553 in_buffer.posn = 0;
1554 in_buffer.buffer = in_data;
1555
1556 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
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.size);
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, 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 ctx.name = xcalloc(10, 1);
1575 ctx.len = 0;
1576 ctx.cdata = NULL;
1577 ctx.userFunc = handle_remote_ls_ctx;
1578 ctx.userData = &ls;
1579 XML_SetUserData(parser, &ctx);
1580 XML_SetElementHandler(parser, xml_start_tag,
1581 xml_end_tag);
1582 XML_SetCharacterDataHandler(parser, xml_cdata);
1583 result = XML_Parse(parser, in_buffer.buffer,
1584 in_buffer.posn, 1);
1585 free(ctx.name);
1586
1587 if (result != XML_STATUS_OK) {
1588 fprintf(stderr, "XML error: %s\n",
1589 XML_ErrorString(
1590 XML_GetErrorCode(parser)));
1591 }
1592 }
1593 } else {
1594 fprintf(stderr, "Unable to start PROPFIND request\n");
1595 }
1596
1597 free(ls.path);
1598 free(url);
1599 free(out_data);
1600 free(in_buffer.buffer);
1601 curl_slist_free_all(dav_headers);
1602 }
1603
1604 static void get_remote_object_list(unsigned char parent)
1605 {
1606 char path[] = "objects/XX/";
1607 static const char hex[] = "0123456789abcdef";
1608 unsigned int val = parent;
1609
1610 path[8] = hex[val >> 4];
1611 path[9] = hex[val & 0xf];
1612 remote_dir_exists[val] = 0;
1613 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1614 process_ls_object, &val);
1615 }
1616
1617 static int locking_available(void)
1618 {
1619 struct active_request_slot *slot;
1620 struct slot_results results;
1621 struct buffer in_buffer;
1622 struct buffer out_buffer;
1623 char *in_data;
1624 char *out_data;
1625 XML_Parser parser = XML_ParserCreate(NULL);
1626 enum XML_Status result;
1627 struct curl_slist *dav_headers = NULL;
1628 struct xml_ctx ctx;
1629 int lock_flags = 0;
1630
1631 out_buffer.size =
1632 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1633 strlen(remote->url) - 2;
1634 out_data = xmalloc(out_buffer.size + 1);
1635 snprintf(out_data, out_buffer.size + 1,
1636 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1637 out_buffer.posn = 0;
1638 out_buffer.buffer = out_data;
1639
1640 in_buffer.size = 4096;
1641 in_data = xmalloc(in_buffer.size);
1642 in_buffer.posn = 0;
1643 in_buffer.buffer = in_data;
1644
1645 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1646 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1647
1648 slot = get_active_slot();
1649 slot->results = &results;
1650 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1651 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1652 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1653 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1654 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1655 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1656 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1657 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1658 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1659
1660 if (start_active_slot(slot)) {
1661 run_active_slot(slot);
1662 if (results.curl_result == CURLE_OK) {
1663 ctx.name = xcalloc(10, 1);
1664 ctx.len = 0;
1665 ctx.cdata = NULL;
1666 ctx.userFunc = handle_lockprop_ctx;
1667 ctx.userData = &lock_flags;
1668 XML_SetUserData(parser, &ctx);
1669 XML_SetElementHandler(parser, xml_start_tag,
1670 xml_end_tag);
1671 result = XML_Parse(parser, in_buffer.buffer,
1672 in_buffer.posn, 1);
1673 free(ctx.name);
1674
1675 if (result != XML_STATUS_OK) {
1676 fprintf(stderr, "XML error: %s\n",
1677 XML_ErrorString(
1678 XML_GetErrorCode(parser)));
1679 lock_flags = 0;
1680 }
1681 }
1682 } else {
1683 fprintf(stderr, "Unable to start PROPFIND request\n");
1684 }
1685
1686 free(out_data);
1687 free(in_buffer.buffer);
1688 curl_slist_free_all(dav_headers);
1689
1690 return lock_flags;
1691 }
1692
1693 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1694 {
1695 struct object_list *entry = xmalloc(sizeof(struct object_list));
1696 entry->item = obj;
1697 entry->next = *p;
1698 *p = entry;
1699 return &entry->next;
1700 }
1701
1702 static struct object_list **process_blob(struct blob *blob,
1703 struct object_list **p,
1704 struct name_path *path,
1705 const char *name)
1706 {
1707 struct object *obj = &blob->object;
1708
1709 obj->flags |= LOCAL;
1710
1711 if (obj->flags & (UNINTERESTING | SEEN))
1712 return p;
1713
1714 obj->flags |= SEEN;
1715 return add_one_object(obj, p);
1716 }
1717
1718 static struct object_list **process_tree(struct tree *tree,
1719 struct object_list **p,
1720 struct name_path *path,
1721 const char *name)
1722 {
1723 struct object *obj = &tree->object;
1724 struct tree_desc desc;
1725 struct name_entry entry;
1726 struct name_path me;
1727
1728 obj->flags |= LOCAL;
1729
1730 if (obj->flags & (UNINTERESTING | SEEN))
1731 return p;
1732 if (parse_tree(tree) < 0)
1733 die("bad tree object %s", sha1_to_hex(obj->sha1));
1734
1735 obj->flags |= SEEN;
1736 name = xstrdup(name);
1737 p = add_one_object(obj, p);
1738 me.up = path;
1739 me.elem = name;
1740 me.elem_len = strlen(name);
1741
1742 init_tree_desc(&desc, tree->buffer, tree->size);
1743
1744 while (tree_entry(&desc, &entry)) {
1745 if (S_ISDIR(entry.mode))
1746 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1747 else
1748 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1749 }
1750 free(tree->buffer);
1751 tree->buffer = NULL;
1752 return p;
1753 }
1754
1755 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1756 {
1757 int i;
1758 struct commit *commit;
1759 struct object_list **p = &objects;
1760 int count = 0;
1761
1762 while ((commit = get_revision(revs)) != NULL) {
1763 p = process_tree(commit->tree, p, NULL, "");
1764 commit->object.flags |= LOCAL;
1765 if (!(commit->object.flags & UNINTERESTING))
1766 count += add_send_request(&commit->object, lock);
1767 }
1768
1769 for (i = 0; i < revs->pending.nr; i++) {
1770 struct object_array_entry *entry = revs->pending.objects + i;
1771 struct object *obj = entry->item;
1772 const char *name = entry->name;
1773
1774 if (obj->flags & (UNINTERESTING | SEEN))
1775 continue;
1776 if (obj->type == OBJ_TAG) {
1777 obj->flags |= SEEN;
1778 p = add_one_object(obj, p);
1779 continue;
1780 }
1781 if (obj->type == OBJ_TREE) {
1782 p = process_tree((struct tree *)obj, p, NULL, name);
1783 continue;
1784 }
1785 if (obj->type == OBJ_BLOB) {
1786 p = process_blob((struct blob *)obj, p, NULL, name);
1787 continue;
1788 }
1789 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1790 }
1791
1792 while (objects) {
1793 if (!(objects->item->flags & UNINTERESTING))
1794 count += add_send_request(objects->item, lock);
1795 objects = objects->next;
1796 }
1797
1798 return count;
1799 }
1800
1801 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1802 {
1803 struct active_request_slot *slot;
1804 struct slot_results results;
1805 char *out_data;
1806 char *if_header;
1807 struct buffer out_buffer;
1808 struct curl_slist *dav_headers = NULL;
1809 int i;
1810
1811 if_header = xmalloc(strlen(lock->token) + 25);
1812 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1813 dav_headers = curl_slist_append(dav_headers, if_header);
1814
1815 out_buffer.size = 41;
1816 out_data = xmalloc(out_buffer.size + 1);
1817 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1818 if (i != out_buffer.size) {
1819 fprintf(stderr, "Unable to initialize PUT request body\n");
1820 return 0;
1821 }
1822 out_buffer.posn = 0;
1823 out_buffer.buffer = out_data;
1824
1825 slot = get_active_slot();
1826 slot->results = &results;
1827 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1828 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1829 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1830 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1831 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1832 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1833 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1834 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1835 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1836
1837 if (start_active_slot(slot)) {
1838 run_active_slot(slot);
1839 free(out_data);
1840 free(if_header);
1841 if (results.curl_result != CURLE_OK) {
1842 fprintf(stderr,
1843 "PUT error: curl result=%d, HTTP code=%ld\n",
1844 results.curl_result, results.http_code);
1845 /* We should attempt recovery? */
1846 return 0;
1847 }
1848 } else {
1849 free(out_data);
1850 free(if_header);
1851 fprintf(stderr, "Unable to start PUT request\n");
1852 return 0;
1853 }
1854
1855 return 1;
1856 }
1857
1858 static struct ref *local_refs, **local_tail;
1859 static struct ref *remote_refs, **remote_tail;
1860
1861 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1862 {
1863 struct ref *ref;
1864 int len = strlen(refname) + 1;
1865 ref = xcalloc(1, sizeof(*ref) + len);
1866 hashcpy(ref->new_sha1, sha1);
1867 memcpy(ref->name, refname, len);
1868 *local_tail = ref;
1869 local_tail = &ref->next;
1870 return 0;
1871 }
1872
1873 static void one_remote_ref(char *refname)
1874 {
1875 struct ref *ref;
1876 unsigned char remote_sha1[20];
1877 struct object *obj;
1878 int len = strlen(refname) + 1;
1879
1880 if (fetch_ref(refname, remote_sha1) != 0) {
1881 fprintf(stderr,
1882 "Unable to fetch ref %s from %s\n",
1883 refname, remote->url);
1884 return;
1885 }
1886
1887 /*
1888 * Fetch a copy of the object if it doesn't exist locally - it
1889 * may be required for updating server info later.
1890 */
1891 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1892 obj = lookup_unknown_object(remote_sha1);
1893 if (obj) {
1894 fprintf(stderr, " fetch %s for %s\n",
1895 sha1_to_hex(remote_sha1), refname);
1896 add_fetch_request(obj);
1897 }
1898 }
1899
1900 ref = xcalloc(1, sizeof(*ref) + len);
1901 hashcpy(ref->old_sha1, remote_sha1);
1902 memcpy(ref->name, refname, len);
1903 *remote_tail = ref;
1904 remote_tail = &ref->next;
1905 }
1906
1907 static void get_local_heads(void)
1908 {
1909 local_tail = &local_refs;
1910 for_each_ref(one_local_ref, NULL);
1911 }
1912
1913 static void get_dav_remote_heads(void)
1914 {
1915 remote_tail = &remote_refs;
1916 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1917 }
1918
1919 static int is_zero_sha1(const unsigned char *sha1)
1920 {
1921 int i;
1922
1923 for (i = 0; i < 20; i++) {
1924 if (*sha1++)
1925 return 0;
1926 }
1927 return 1;
1928 }
1929
1930 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1931 {
1932 while (list) {
1933 struct commit_list *temp = list;
1934 temp->item->object.flags &= ~mark;
1935 list = temp->next;
1936 free(temp);
1937 }
1938 }
1939
1940 static int ref_newer(const unsigned char *new_sha1,
1941 const unsigned char *old_sha1)
1942 {
1943 struct object *o;
1944 struct commit *old, *new;
1945 struct commit_list *list, *used;
1946 int found = 0;
1947
1948 /* Both new and old must be commit-ish and new is descendant of
1949 * old. Otherwise we require --force.
1950 */
1951 o = deref_tag(parse_object(old_sha1), NULL, 0);
1952 if (!o || o->type != OBJ_COMMIT)
1953 return 0;
1954 old = (struct commit *) o;
1955
1956 o = deref_tag(parse_object(new_sha1), NULL, 0);
1957 if (!o || o->type != OBJ_COMMIT)
1958 return 0;
1959 new = (struct commit *) o;
1960
1961 if (parse_commit(new) < 0)
1962 return 0;
1963
1964 used = list = NULL;
1965 commit_list_insert(new, &list);
1966 while (list) {
1967 new = pop_most_recent_commit(&list, TMP_MARK);
1968 commit_list_insert(new, &used);
1969 if (new == old) {
1970 found = 1;
1971 break;
1972 }
1973 }
1974 unmark_and_free(list, TMP_MARK);
1975 unmark_and_free(used, TMP_MARK);
1976 return found;
1977 }
1978
1979 static void mark_edge_parents_uninteresting(struct commit *commit)
1980 {
1981 struct commit_list *parents;
1982
1983 for (parents = commit->parents; parents; parents = parents->next) {
1984 struct commit *parent = parents->item;
1985 if (!(parent->object.flags & UNINTERESTING))
1986 continue;
1987 mark_tree_uninteresting(parent->tree);
1988 }
1989 }
1990
1991 static void mark_edges_uninteresting(struct commit_list *list)
1992 {
1993 for ( ; list; list = list->next) {
1994 struct commit *commit = list->item;
1995
1996 if (commit->object.flags & UNINTERESTING) {
1997 mark_tree_uninteresting(commit->tree);
1998 continue;
1999 }
2000 mark_edge_parents_uninteresting(commit);
2001 }
2002 }
2003
2004 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2005 {
2006 struct buffer *buf = (struct buffer *)ls->userData;
2007 unsigned char remote_sha1[20];
2008 struct object *o;
2009 int len;
2010 char *ref_info;
2011
2012 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2013 fprintf(stderr,
2014 "Unable to fetch ref %s from %s\n",
2015 ls->dentry_name, remote->url);
2016 aborted = 1;
2017 return;
2018 }
2019
2020 o = parse_object(remote_sha1);
2021 if (!o) {
2022 fprintf(stderr,
2023 "Unable to parse object %s for remote ref %s\n",
2024 sha1_to_hex(remote_sha1), ls->dentry_name);
2025 aborted = 1;
2026 return;
2027 }
2028
2029 len = strlen(ls->dentry_name) + 42;
2030 ref_info = xcalloc(len + 1, 1);
2031 sprintf(ref_info, "%s %s\n",
2032 sha1_to_hex(remote_sha1), ls->dentry_name);
2033 fwrite_buffer(ref_info, 1, len, buf);
2034 free(ref_info);
2035
2036 if (o->type == OBJ_TAG) {
2037 o = deref_tag(o, ls->dentry_name, 0);
2038 if (o) {
2039 len = strlen(ls->dentry_name) + 45;
2040 ref_info = xcalloc(len + 1, 1);
2041 sprintf(ref_info, "%s %s^{}\n",
2042 sha1_to_hex(o->sha1), ls->dentry_name);
2043 fwrite_buffer(ref_info, 1, len, buf);
2044 free(ref_info);
2045 }
2046 }
2047 }
2048
2049 static void update_remote_info_refs(struct remote_lock *lock)
2050 {
2051 struct buffer buffer;
2052 struct active_request_slot *slot;
2053 struct slot_results results;
2054 char *if_header;
2055 struct curl_slist *dav_headers = NULL;
2056
2057 buffer.buffer = xcalloc(1, 4096);
2058 buffer.size = 4096;
2059 buffer.posn = 0;
2060 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2061 add_remote_info_ref, &buffer);
2062 if (!aborted) {
2063 if_header = xmalloc(strlen(lock->token) + 25);
2064 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2065 dav_headers = curl_slist_append(dav_headers, if_header);
2066
2067 slot = get_active_slot();
2068 slot->results = &results;
2069 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2070 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2071 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2072 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2073 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2074 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2075 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2076 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2077 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2078
2079 buffer.posn = 0;
2080
2081 if (start_active_slot(slot)) {
2082 run_active_slot(slot);
2083 if (results.curl_result != CURLE_OK) {
2084 fprintf(stderr,
2085 "PUT error: curl result=%d, HTTP code=%ld\n",
2086 results.curl_result, results.http_code);
2087 }
2088 }
2089 free(if_header);
2090 }
2091 free(buffer.buffer);
2092 }
2093
2094 static int remote_exists(const char *path)
2095 {
2096 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2097 struct active_request_slot *slot;
2098 struct slot_results results;
2099
2100 sprintf(url, "%s%s", remote->url, path);
2101
2102 slot = get_active_slot();
2103 slot->results = &results;
2104 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2105 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2106
2107 if (start_active_slot(slot)) {
2108 run_active_slot(slot);
2109 if (results.http_code == 404)
2110 return 0;
2111 else if (results.curl_result == CURLE_OK)
2112 return 1;
2113 else
2114 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2115 } else {
2116 fprintf(stderr, "Unable to start HEAD request\n");
2117 }
2118
2119 return -1;
2120 }
2121
2122 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2123 {
2124 char *url;
2125 struct buffer buffer;
2126 struct active_request_slot *slot;
2127 struct slot_results results;
2128
2129 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2130 sprintf(url, "%s%s", remote->url, path);
2131
2132 buffer.size = 4096;
2133 buffer.posn = 0;
2134 buffer.buffer = xmalloc(buffer.size);
2135
2136 slot = get_active_slot();
2137 slot->results = &results;
2138 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2139 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2140 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2141 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2142 if (start_active_slot(slot)) {
2143 run_active_slot(slot);
2144 if (results.curl_result != CURLE_OK) {
2145 die("Couldn't get %s for remote symref\n%s",
2146 url, curl_errorstr);
2147 }
2148 } else {
2149 die("Unable to start remote symref request");
2150 }
2151 free(url);
2152
2153 if (*symref != NULL)
2154 free(*symref);
2155 *symref = NULL;
2156 hashclr(sha1);
2157
2158 if (buffer.posn == 0)
2159 return;
2160
2161 /* If it's a symref, set the refname; otherwise try for a sha1 */
2162 if (!prefixcmp((char *)buffer.buffer, "ref: ")) {
2163 *symref = xmalloc(buffer.posn - 5);
2164 memcpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 6);
2165 (*symref)[buffer.posn - 6] = '\0';
2166 } else {
2167 get_sha1_hex(buffer.buffer, sha1);
2168 }
2169
2170 free(buffer.buffer);
2171 }
2172
2173 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2174 {
2175 struct commit *head = lookup_commit(head_sha1);
2176 struct commit *branch = lookup_commit(branch_sha1);
2177 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2178
2179 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2180 }
2181
2182 static int delete_remote_branch(char *pattern, int force)
2183 {
2184 struct ref *refs = remote_refs;
2185 struct ref *remote_ref = NULL;
2186 unsigned char head_sha1[20];
2187 char *symref = NULL;
2188 int match;
2189 int patlen = strlen(pattern);
2190 int i;
2191 struct active_request_slot *slot;
2192 struct slot_results results;
2193 char *url;
2194
2195 /* Find the remote branch(es) matching the specified branch name */
2196 for (match = 0; refs; refs = refs->next) {
2197 char *name = refs->name;
2198 int namelen = strlen(name);
2199 if (namelen < patlen ||
2200 memcmp(name + namelen - patlen, pattern, patlen))
2201 continue;
2202 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2203 continue;
2204 match++;
2205 remote_ref = refs;
2206 }
2207 if (match == 0)
2208 return error("No remote branch matches %s", pattern);
2209 if (match != 1)
2210 return error("More than one remote branch matches %s",
2211 pattern);
2212
2213 /*
2214 * Remote HEAD must be a symref (not exactly foolproof; a remote
2215 * symlink to a symref will look like a symref)
2216 */
2217 fetch_symref("HEAD", &symref, head_sha1);
2218 if (!symref)
2219 return error("Remote HEAD is not a symref");
2220
2221 /* Remote branch must not be the remote HEAD */
2222 for (i=0; symref && i<MAXDEPTH; i++) {
2223 if (!strcmp(remote_ref->name, symref))
2224 return error("Remote branch %s is the current HEAD",
2225 remote_ref->name);
2226 fetch_symref(symref, &symref, head_sha1);
2227 }
2228
2229 /* Run extra sanity checks if delete is not forced */
2230 if (!force) {
2231 /* Remote HEAD must resolve to a known object */
2232 if (symref)
2233 return error("Remote HEAD symrefs too deep");
2234 if (is_zero_sha1(head_sha1))
2235 return error("Unable to resolve remote HEAD");
2236 if (!has_sha1_file(head_sha1))
2237 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2238
2239 /* Remote branch must resolve to a known object */
2240 if (is_zero_sha1(remote_ref->old_sha1))
2241 return error("Unable to resolve remote branch %s",
2242 remote_ref->name);
2243 if (!has_sha1_file(remote_ref->old_sha1))
2244 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));
2245
2246 /* Remote branch must be an ancestor of remote HEAD */
2247 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2248 return error("The branch '%s' is not a strict subset of your current HEAD.\nIf you are sure you want to delete it, run:\n\t'git http-push -D %s %s'", remote_ref->name, remote->url, pattern);
2249 }
2250 }
2251
2252 /* Send delete request */
2253 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2254 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2255 sprintf(url, "%s%s", remote->url, remote_ref->name);
2256 slot = get_active_slot();
2257 slot->results = &results;
2258 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2259 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2260 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2261 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2262 if (start_active_slot(slot)) {
2263 run_active_slot(slot);
2264 free(url);
2265 if (results.curl_result != CURLE_OK)
2266 return error("DELETE request failed (%d/%ld)\n",
2267 results.curl_result, results.http_code);
2268 } else {
2269 free(url);
2270 return error("Unable to start DELETE request");
2271 }
2272
2273 return 0;
2274 }
2275
2276 int main(int argc, char **argv)
2277 {
2278 struct transfer_request *request;
2279 struct transfer_request *next_request;
2280 int nr_refspec = 0;
2281 char **refspec = NULL;
2282 struct remote_lock *ref_lock = NULL;
2283 struct remote_lock *info_ref_lock = NULL;
2284 struct rev_info revs;
2285 int delete_branch = 0;
2286 int force_delete = 0;
2287 int objects_to_send;
2288 int rc = 0;
2289 int i;
2290 int new_refs;
2291 struct ref *ref;
2292
2293 setup_git_directory();
2294
2295 remote = xcalloc(sizeof(*remote), 1);
2296
2297 argv++;
2298 for (i = 1; i < argc; i++, argv++) {
2299 char *arg = *argv;
2300
2301 if (*arg == '-') {
2302 if (!strcmp(arg, "--all")) {
2303 push_all = 1;
2304 continue;
2305 }
2306 if (!strcmp(arg, "--force")) {
2307 force_all = 1;
2308 continue;
2309 }
2310 if (!strcmp(arg, "--verbose")) {
2311 push_verbosely = 1;
2312 continue;
2313 }
2314 if (!strcmp(arg, "-d")) {
2315 delete_branch = 1;
2316 continue;
2317 }
2318 if (!strcmp(arg, "-D")) {
2319 delete_branch = 1;
2320 force_delete = 1;
2321 continue;
2322 }
2323 }
2324 if (!remote->url) {
2325 char *path = strstr(arg, "//");
2326 remote->url = arg;
2327 if (path) {
2328 path = strchr(path+2, '/');
2329 if (path)
2330 remote->path_len = strlen(path);
2331 }
2332 continue;
2333 }
2334 refspec = argv;
2335 nr_refspec = argc - i;
2336 break;
2337 }
2338
2339 if (!remote->url)
2340 usage(http_push_usage);
2341
2342 if (delete_branch && nr_refspec != 1)
2343 die("You must specify only one branch name when deleting a remote branch");
2344
2345 memset(remote_dir_exists, -1, 256);
2346
2347 http_init();
2348
2349 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2350 default_headers = curl_slist_append(default_headers, "Range:");
2351 default_headers = curl_slist_append(default_headers, "Destination:");
2352 default_headers = curl_slist_append(default_headers, "If:");
2353 default_headers = curl_slist_append(default_headers,
2354 "Pragma: no-cache");
2355
2356 /* Verify DAV compliance/lock support */
2357 if (!locking_available()) {
2358 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2359 rc = 1;
2360 goto cleanup;
2361 }
2362
2363 /* Check whether the remote has server info files */
2364 remote->can_update_info_refs = 0;
2365 remote->has_info_refs = remote_exists("info/refs");
2366 remote->has_info_packs = remote_exists("objects/info/packs");
2367 if (remote->has_info_refs) {
2368 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2369 if (info_ref_lock)
2370 remote->can_update_info_refs = 1;
2371 }
2372 if (remote->has_info_packs)
2373 fetch_indices();
2374
2375 /* Get a list of all local and remote heads to validate refspecs */
2376 get_local_heads();
2377 fprintf(stderr, "Fetching remote heads...\n");
2378 get_dav_remote_heads();
2379
2380 /* Remove a remote branch if -d or -D was specified */
2381 if (delete_branch) {
2382 if (delete_remote_branch(refspec[0], force_delete) == -1)
2383 fprintf(stderr, "Unable to delete remote branch %s\n",
2384 refspec[0]);
2385 goto cleanup;
2386 }
2387
2388 /* match them up */
2389 if (!remote_tail)
2390 remote_tail = &remote_refs;
2391 if (match_refs(local_refs, remote_refs, &remote_tail,
2392 nr_refspec, refspec, push_all))
2393 return -1;
2394 if (!remote_refs) {
2395 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2396 return 0;
2397 }
2398
2399 new_refs = 0;
2400 for (ref = remote_refs; ref; ref = ref->next) {
2401 char old_hex[60], *new_hex;
2402 const char *commit_argv[4];
2403 int commit_argc;
2404 char *new_sha1_hex, *old_sha1_hex;
2405
2406 if (!ref->peer_ref)
2407 continue;
2408 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2409 if (push_verbosely || 1)
2410 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2411 continue;
2412 }
2413
2414 if (!force_all &&
2415 !is_zero_sha1(ref->old_sha1) &&
2416 !ref->force) {
2417 if (!has_sha1_file(ref->old_sha1) ||
2418 !ref_newer(ref->peer_ref->new_sha1,
2419 ref->old_sha1)) {
2420 /* We do not have the remote ref, or
2421 * we know that the remote ref is not
2422 * an ancestor of what we are trying to
2423 * push. Either way this can be losing
2424 * commits at the remote end and likely
2425 * we were not up to date to begin with.
2426 */
2427 error("remote '%s' is not a strict "
2428 "subset of local ref '%s'. "
2429 "maybe you are not up-to-date and "
2430 "need to pull first?",
2431 ref->name,
2432 ref->peer_ref->name);
2433 rc = -2;
2434 continue;
2435 }
2436 }
2437 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2438 if (is_zero_sha1(ref->new_sha1)) {
2439 error("cannot happen anymore");
2440 rc = -3;
2441 continue;
2442 }
2443 new_refs++;
2444 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2445 new_hex = sha1_to_hex(ref->new_sha1);
2446
2447 fprintf(stderr, "updating '%s'", ref->name);
2448 if (strcmp(ref->name, ref->peer_ref->name))
2449 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2450 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2451
2452
2453 /* Lock remote branch ref */
2454 ref_lock = lock_remote(ref->name, LOCK_TIME);
2455 if (ref_lock == NULL) {
2456 fprintf(stderr, "Unable to lock remote branch %s\n",
2457 ref->name);
2458 rc = 1;
2459 continue;
2460 }
2461
2462 /* Set up revision info for this refspec */
2463 commit_argc = 3;
2464 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2465 old_sha1_hex = NULL;
2466 commit_argv[1] = "--objects";
2467 commit_argv[2] = new_sha1_hex;
2468 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2469 old_sha1_hex = xmalloc(42);
2470 sprintf(old_sha1_hex, "^%s",
2471 sha1_to_hex(ref->old_sha1));
2472 commit_argv[3] = old_sha1_hex;
2473 commit_argc++;
2474 }
2475 init_revisions(&revs, setup_git_directory());
2476 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2477 free(new_sha1_hex);
2478 if (old_sha1_hex) {
2479 free(old_sha1_hex);
2480 commit_argv[1] = NULL;
2481 }
2482
2483 /* Generate a list of objects that need to be pushed */
2484 pushing = 0;
2485 prepare_revision_walk(&revs);
2486 mark_edges_uninteresting(revs.commits);
2487 objects_to_send = get_delta(&revs, ref_lock);
2488 finish_all_active_slots();
2489
2490 /* Push missing objects to remote, this would be a
2491 convenient time to pack them first if appropriate. */
2492 pushing = 1;
2493 if (objects_to_send)
2494 fprintf(stderr, " sending %d objects\n",
2495 objects_to_send);
2496 #ifdef USE_CURL_MULTI
2497 fill_active_slots();
2498 add_fill_function(NULL, fill_active_slot);
2499 #endif
2500 finish_all_active_slots();
2501
2502 /* Update the remote branch if all went well */
2503 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2504 rc = 1;
2505 goto unlock;
2506 }
2507
2508 unlock:
2509 if (!rc)
2510 fprintf(stderr, " done\n");
2511 unlock_remote(ref_lock);
2512 check_locks();
2513 }
2514
2515 /* Update remote server info if appropriate */
2516 if (remote->has_info_refs && new_refs) {
2517 if (info_ref_lock && remote->can_update_info_refs) {
2518 fprintf(stderr, "Updating remote server info\n");
2519 update_remote_info_refs(info_ref_lock);
2520 } else {
2521 fprintf(stderr, "Unable to update server info\n");
2522 }
2523 }
2524 if (info_ref_lock)
2525 unlock_remote(info_ref_lock);
2526
2527 cleanup:
2528 free(remote);
2529
2530 curl_slist_free_all(no_pragma_header);
2531 curl_slist_free_all(default_headers);
2532
2533 http_cleanup();
2534
2535 request = request_queue_head;
2536 while (request != NULL) {
2537 next_request = request->next;
2538 release_request(request);
2539 request = next_request;
2540 }
2541
2542 return rc;
2543 }
MinGW port of GIT