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Use strbuf in http code
[alt-git.git] / http-push.c
blob0257291b9ba9258558632b1e428df6479a28b9db
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78
79 static int push_verbosely;
80 static int push_all = MATCH_REFS_NONE;
81 static int force_all;
82 static int dry_run;
83
84 static struct object_list *objects;
85
86 struct repo
87 {
88 char *url;
89 int path_len;
90 int has_info_refs;
91 int can_update_info_refs;
92 int has_info_packs;
93 struct packed_git *packs;
94 struct remote_lock *locks;
95 };
96
97 static struct repo *remote;
98
99 enum transfer_state {
100 NEED_FETCH,
101 RUN_FETCH_LOOSE,
102 RUN_FETCH_PACKED,
103 NEED_PUSH,
104 RUN_MKCOL,
105 RUN_PUT,
106 RUN_MOVE,
107 ABORTED,
108 COMPLETE,
109 };
110
111 struct transfer_request
112 {
113 struct object *obj;
114 char *url;
115 char *dest;
116 struct remote_lock *lock;
117 struct curl_slist *headers;
118 struct buffer buffer;
119 char filename[PATH_MAX];
120 char tmpfile[PATH_MAX];
121 int local_fileno;
122 FILE *local_stream;
123 enum transfer_state state;
124 CURLcode curl_result;
125 char errorstr[CURL_ERROR_SIZE];
126 long http_code;
127 unsigned char real_sha1[20];
128 SHA_CTX c;
129 z_stream stream;
130 int zret;
131 int rename;
132 void *userData;
133 struct active_request_slot *slot;
134 struct transfer_request *next;
135 };
136
137 static struct transfer_request *request_queue_head;
138
139 struct xml_ctx
140 {
141 char *name;
142 int len;
143 char *cdata;
144 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
145 void *userData;
146 };
147
148 struct remote_lock
149 {
150 char *url;
151 char *owner;
152 char *token;
153 time_t start_time;
154 long timeout;
155 int refreshing;
156 struct remote_lock *next;
157 };
158
159 /* Flags that control remote_ls processing */
160 #define PROCESS_FILES (1u << 0)
161 #define PROCESS_DIRS (1u << 1)
162 #define RECURSIVE (1u << 2)
163
164 /* Flags that remote_ls passes to callback functions */
165 #define IS_DIR (1u << 0)
166
167 struct remote_ls_ctx
168 {
169 char *path;
170 void (*userFunc)(struct remote_ls_ctx *ls);
171 void *userData;
172 int flags;
173 char *dentry_name;
174 int dentry_flags;
175 struct remote_ls_ctx *parent;
176 };
177
178 static void finish_request(struct transfer_request *request);
179 static void release_request(struct transfer_request *request);
180
181 static void process_response(void *callback_data)
182 {
183 struct transfer_request *request =
184 (struct transfer_request *)callback_data;
185
186 finish_request(request);
187 }
188
189 #ifdef USE_CURL_MULTI
190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
191 void *data)
192 {
193 unsigned char expn[4096];
194 size_t size = eltsize * nmemb;
195 int posn = 0;
196 struct transfer_request *request = (struct transfer_request *)data;
197 do {
198 ssize_t retval = xwrite(request->local_fileno,
199 (char *) ptr + posn, size - posn);
200 if (retval < 0)
201 return posn;
202 posn += retval;
203 } while (posn < size);
204
205 request->stream.avail_in = size;
206 request->stream.next_in = ptr;
207 do {
208 request->stream.next_out = expn;
209 request->stream.avail_out = sizeof(expn);
210 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
211 SHA1_Update(&request->c, expn,
212 sizeof(expn) - request->stream.avail_out);
213 } while (request->stream.avail_in && request->zret == Z_OK);
214 data_received++;
215 return size;
216 }
217
218 static void start_fetch_loose(struct transfer_request *request)
219 {
220 char *hex = sha1_to_hex(request->obj->sha1);
221 char *filename;
222 char prevfile[PATH_MAX];
223 char *url;
224 char *posn;
225 int prevlocal;
226 unsigned char prev_buf[PREV_BUF_SIZE];
227 ssize_t prev_read = 0;
228 long prev_posn = 0;
229 char range[RANGE_HEADER_SIZE];
230 struct curl_slist *range_header = NULL;
231 struct active_request_slot *slot;
232
233 filename = sha1_file_name(request->obj->sha1);
234 snprintf(request->filename, sizeof(request->filename), "%s", filename);
235 snprintf(request->tmpfile, sizeof(request->tmpfile),
236 "%s.temp", filename);
237
238 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
239 unlink(prevfile);
240 rename(request->tmpfile, prevfile);
241 unlink(request->tmpfile);
242
243 if (request->local_fileno != -1)
244 error("fd leakage in start: %d", request->local_fileno);
245 request->local_fileno = open(request->tmpfile,
246 O_WRONLY | O_CREAT | O_EXCL, 0666);
247 /* This could have failed due to the "lazy directory creation";
248 * try to mkdir the last path component.
249 */
250 if (request->local_fileno < 0 && errno == ENOENT) {
251 char *dir = strrchr(request->tmpfile, '/');
252 if (dir) {
253 *dir = 0;
254 mkdir(request->tmpfile, 0777);
255 *dir = '/';
256 }
257 request->local_fileno = open(request->tmpfile,
258 O_WRONLY | O_CREAT | O_EXCL, 0666);
259 }
260
261 if (request->local_fileno < 0) {
262 request->state = ABORTED;
263 error("Couldn't create temporary file %s for %s: %s",
264 request->tmpfile, request->filename, strerror(errno));
265 return;
266 }
267
268 memset(&request->stream, 0, sizeof(request->stream));
269
270 inflateInit(&request->stream);
271
272 SHA1_Init(&request->c);
273
274 url = xmalloc(strlen(remote->url) + 50);
275 request->url = xmalloc(strlen(remote->url) + 50);
276 strcpy(url, remote->url);
277 posn = url + strlen(remote->url);
278 strcpy(posn, "objects/");
279 posn += 8;
280 memcpy(posn, hex, 2);
281 posn += 2;
282 *(posn++) = '/';
283 strcpy(posn, hex + 2);
284 strcpy(request->url, url);
285
286 /* If a previous temp file is present, process what was already
287 fetched. */
288 prevlocal = open(prevfile, O_RDONLY);
289 if (prevlocal != -1) {
290 do {
291 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
292 if (prev_read>0) {
293 if (fwrite_sha1_file(prev_buf,
294 1,
295 prev_read,
296 request) == prev_read) {
297 prev_posn += prev_read;
298 } else {
299 prev_read = -1;
300 }
301 }
302 } while (prev_read > 0);
303 close(prevlocal);
304 }
305 unlink(prevfile);
306
307 /* Reset inflate/SHA1 if there was an error reading the previous temp
308 file; also rewind to the beginning of the local file. */
309 if (prev_read == -1) {
310 memset(&request->stream, 0, sizeof(request->stream));
311 inflateInit(&request->stream);
312 SHA1_Init(&request->c);
313 if (prev_posn>0) {
314 prev_posn = 0;
315 lseek(request->local_fileno, 0, SEEK_SET);
316 ftruncate(request->local_fileno, 0);
317 }
318 }
319
320 slot = get_active_slot();
321 slot->callback_func = process_response;
322 slot->callback_data = request;
323 request->slot = slot;
324
325 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
326 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
327 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
328 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
330
331 /* If we have successfully processed data from a previous fetch
332 attempt, only fetch the data we don't already have. */
333 if (prev_posn>0) {
334 if (push_verbosely)
335 fprintf(stderr,
336 "Resuming fetch of object %s at byte %ld\n",
337 hex, prev_posn);
338 sprintf(range, "Range: bytes=%ld-", prev_posn);
339 range_header = curl_slist_append(range_header, range);
340 curl_easy_setopt(slot->curl,
341 CURLOPT_HTTPHEADER, range_header);
342 }
343
344 /* Try to get the request started, abort the request on error */
345 request->state = RUN_FETCH_LOOSE;
346 if (!start_active_slot(slot)) {
347 fprintf(stderr, "Unable to start GET request\n");
348 remote->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_mkcol(struct transfer_request *request)
354 {
355 char *hex = sha1_to_hex(request->obj->sha1);
356 struct active_request_slot *slot;
357 char *posn;
358
359 request->url = xmalloc(strlen(remote->url) + 13);
360 strcpy(request->url, remote->url);
361 posn = request->url + strlen(remote->url);
362 strcpy(posn, "objects/");
363 posn += 8;
364 memcpy(posn, hex, 2);
365 posn += 2;
366 strcpy(posn, "/");
367
368 slot = get_active_slot();
369 slot->callback_func = process_response;
370 slot->callback_data = request;
371 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
372 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
373 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
374 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
375 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
376
377 if (start_active_slot(slot)) {
378 request->slot = slot;
379 request->state = RUN_MKCOL;
380 } else {
381 request->state = ABORTED;
382 free(request->url);
383 request->url = NULL;
384 }
385 }
386 #endif
387
388 static void start_fetch_packed(struct transfer_request *request)
389 {
390 char *url;
391 struct packed_git *target;
392 FILE *packfile;
393 char *filename;
394 long prev_posn = 0;
395 char range[RANGE_HEADER_SIZE];
396 struct curl_slist *range_header = NULL;
397
398 struct transfer_request *check_request = request_queue_head;
399 struct active_request_slot *slot;
400
401 target = find_sha1_pack(request->obj->sha1, remote->packs);
402 if (!target) {
403 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
404 remote->can_update_info_refs = 0;
405 release_request(request);
406 return;
407 }
408
409 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
410 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
411
412 filename = sha1_pack_name(target->sha1);
413 snprintf(request->filename, sizeof(request->filename), "%s", filename);
414 snprintf(request->tmpfile, sizeof(request->tmpfile),
415 "%s.temp", filename);
416
417 url = xmalloc(strlen(remote->url) + 64);
418 sprintf(url, "%sobjects/pack/pack-%s.pack",
419 remote->url, sha1_to_hex(target->sha1));
420
421 /* Make sure there isn't another open request for this pack */
422 while (check_request) {
423 if (check_request->state == RUN_FETCH_PACKED &&
424 !strcmp(check_request->url, url)) {
425 free(url);
426 release_request(request);
427 return;
428 }
429 check_request = check_request->next;
430 }
431
432 packfile = fopen(request->tmpfile, "a");
433 if (!packfile) {
434 fprintf(stderr, "Unable to open local file %s for pack",
435 request->tmpfile);
436 remote->can_update_info_refs = 0;
437 free(url);
438 return;
439 }
440
441 slot = get_active_slot();
442 slot->callback_func = process_response;
443 slot->callback_data = request;
444 request->slot = slot;
445 request->local_stream = packfile;
446 request->userData = target;
447
448 request->url = url;
449 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
450 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
451 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
453 slot->local = packfile;
454
455 /* If there is data present from a previous transfer attempt,
456 resume where it left off */
457 prev_posn = ftell(packfile);
458 if (prev_posn>0) {
459 if (push_verbosely)
460 fprintf(stderr,
461 "Resuming fetch of pack %s at byte %ld\n",
462 sha1_to_hex(target->sha1), prev_posn);
463 sprintf(range, "Range: bytes=%ld-", prev_posn);
464 range_header = curl_slist_append(range_header, range);
465 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
466 }
467
468 /* Try to get the request started, abort the request on error */
469 request->state = RUN_FETCH_PACKED;
470 if (!start_active_slot(slot)) {
471 fprintf(stderr, "Unable to start GET request\n");
472 remote->can_update_info_refs = 0;
473 release_request(request);
474 }
475 }
476
477 static void start_put(struct transfer_request *request)
478 {
479 char *hex = sha1_to_hex(request->obj->sha1);
480 struct active_request_slot *slot;
481 char *posn;
482 enum object_type type;
483 char hdr[50];
484 void *unpacked;
485 unsigned long len;
486 int hdrlen;
487 ssize_t size;
488 z_stream stream;
489
490 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
491 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
492
493 /* Set it up */
494 memset(&stream, 0, sizeof(stream));
495 deflateInit(&stream, zlib_compression_level);
496 size = deflateBound(&stream, len + hdrlen);
497 strbuf_init(&request->buffer.buf, size);
498 request->buffer.posn = 0;
499
500 /* Compress it */
501 stream.next_out = (unsigned char *)request->buffer.buf.buf;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.buf.len = stream.total_out;
519
520 request->url = xmalloc(strlen(remote->url) +
521 strlen(request->lock->token) + 51);
522 strcpy(request->url, remote->url);
523 posn = request->url + strlen(remote->url);
524 strcpy(posn, "objects/");
525 posn += 8;
526 memcpy(posn, hex, 2);
527 posn += 2;
528 *(posn++) = '/';
529 strcpy(posn, hex + 2);
530 request->dest = xmalloc(strlen(request->url) + 14);
531 sprintf(request->dest, "Destination: %s", request->url);
532 posn += 38;
533 *(posn++) = '_';
534 strcpy(posn, request->lock->token);
535
536 slot = get_active_slot();
537 slot->callback_func = process_response;
538 slot->callback_data = request;
539 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
540 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
541 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
543 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
545 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
548
549 if (start_active_slot(slot)) {
550 request->slot = slot;
551 request->state = RUN_PUT;
552 } else {
553 request->state = ABORTED;
554 free(request->url);
555 request->url = NULL;
556 }
557 }
558
559 static void start_move(struct transfer_request *request)
560 {
561 struct active_request_slot *slot;
562 struct curl_slist *dav_headers = NULL;
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
568 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
569 dav_headers = curl_slist_append(dav_headers, request->dest);
570 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
571 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
572 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
573 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
574
575 if (start_active_slot(slot)) {
576 request->slot = slot;
577 request->state = RUN_MOVE;
578 } else {
579 request->state = ABORTED;
580 free(request->url);
581 request->url = NULL;
582 }
583 }
584
585 static int refresh_lock(struct remote_lock *lock)
586 {
587 struct active_request_slot *slot;
588 struct slot_results results;
589 char *if_header;
590 char timeout_header[25];
591 struct curl_slist *dav_headers = NULL;
592 int rc = 0;
593
594 lock->refreshing = 1;
595
596 if_header = xmalloc(strlen(lock->token) + 25);
597 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
598 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
599 dav_headers = curl_slist_append(dav_headers, if_header);
600 dav_headers = curl_slist_append(dav_headers, timeout_header);
601
602 slot = get_active_slot();
603 slot->results = &results;
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
606 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
607 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
608 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
609
610 if (start_active_slot(slot)) {
611 run_active_slot(slot);
612 if (results.curl_result != CURLE_OK) {
613 fprintf(stderr, "LOCK HTTP error %ld\n",
614 results.http_code);
615 } else {
616 lock->start_time = time(NULL);
617 rc = 1;
618 }
619 }
620
621 lock->refreshing = 0;
622 curl_slist_free_all(dav_headers);
623 free(if_header);
624
625 return rc;
626 }
627
628 static void check_locks(void)
629 {
630 struct remote_lock *lock = remote->locks;
631 time_t current_time = time(NULL);
632 int time_remaining;
633
634 while (lock) {
635 time_remaining = lock->start_time + lock->timeout -
636 current_time;
637 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
638 if (!refresh_lock(lock)) {
639 fprintf(stderr,
640 "Unable to refresh lock for %s\n",
641 lock->url);
642 aborted = 1;
643 return;
644 }
645 }
646 lock = lock->next;
647 }
648 }
649
650 static void release_request(struct transfer_request *request)
651 {
652 struct transfer_request *entry = request_queue_head;
653
654 if (request == request_queue_head) {
655 request_queue_head = request->next;
656 } else {
657 while (entry->next != NULL && entry->next != request)
658 entry = entry->next;
659 if (entry->next == request)
660 entry->next = entry->next->next;
661 }
662
663 if (request->local_fileno != -1)
664 close(request->local_fileno);
665 if (request->local_stream)
666 fclose(request->local_stream);
667 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 free(url);
928 return error("Unable to start request");
929 }
930
931 if (has_pack_index(sha1)) {
932 free(url);
933 return 0;
934 }
935
936 if (push_verbosely)
937 fprintf(stderr, "Getting index for pack %s\n", hex);
938
939 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
940
941 filename = sha1_pack_index_name(sha1);
942 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
943 indexfile = fopen(tmpfile, "a");
944 if (!indexfile) {
945 free(url);
946 return error("Unable to open local file %s for pack index",
947 tmpfile);
948 }
949
950 slot = get_active_slot();
951 slot->results = &results;
952 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
953 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
954 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
955 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
956 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
957 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
958 slot->local = indexfile;
959
960 /* If there is data present from a previous transfer attempt,
961 resume where it left off */
962 prev_posn = ftell(indexfile);
963 if (prev_posn>0) {
964 if (push_verbosely)
965 fprintf(stderr,
966 "Resuming fetch of index for pack %s at byte %ld\n",
967 hex, prev_posn);
968 sprintf(range, "Range: bytes=%ld-", prev_posn);
969 range_header = curl_slist_append(range_header, range);
970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
971 }
972
973 if (start_active_slot(slot)) {
974 run_active_slot(slot);
975 if (results.curl_result != CURLE_OK) {
976 free(url);
977 fclose(indexfile);
978 return error("Unable to get pack index %s\n%s", url,
979 curl_errorstr);
980 }
981 } else {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to start request");
985 }
986
987 free(url);
988 fclose(indexfile);
989
990 return move_temp_to_file(tmpfile, filename);
991 }
992
993 static int setup_index(unsigned char *sha1)
994 {
995 struct packed_git *new_pack;
996
997 if (fetch_index(sha1))
998 return -1;
999
1000 new_pack = parse_pack_index(sha1);
1001 new_pack->next = remote->packs;
1002 remote->packs = new_pack;
1003 return 0;
1004 }
1005
1006 static int fetch_indices(void)
1007 {
1008 unsigned char sha1[20];
1009 char *url;
1010 struct strbuf buffer = STRBUF_INIT;
1011 char *data;
1012 int i = 0;
1013
1014 struct active_request_slot *slot;
1015 struct slot_results results;
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 strbuf_release(&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 strbuf_release(&buffer);
1041 free(url);
1042 return error("Unable to start request");
1043 }
1044 free(url);
1045
1046 data = buffer.buf;
1047 while (i < buffer.len) {
1048 switch (data[i]) {
1049 case 'P':
1050 i++;
1051 if (i + 52 < buffer.len &&
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 strbuf_release(&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 struct strbuf buffer = STRBUF_INIT;
1119 char *base = remote->url;
1120 struct active_request_slot *slot;
1121 struct slot_results results;
1122
1123 url = quote_ref_url(base, ref);
1124 slot = get_active_slot();
1125 slot->results = &results;
1126 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1127 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1128 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1129 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1130 if (start_active_slot(slot)) {
1131 run_active_slot(slot);
1132 free(url);
1133 if (results.curl_result != CURLE_OK)
1134 return error("Couldn't get %s for %s\n%s",
1135 url, ref, curl_errorstr);
1136 } else {
1137 free(url);
1138 return error("Unable to start request");
1139 }
1140
1141 strbuf_rtrim(&buffer);
1142 if (buffer.len != 40)
1143 return 1;
1144 return get_sha1_hex(buffer.buf, sha1);
1145 }
1146
1147 static void one_remote_object(const char *hex)
1148 {
1149 unsigned char sha1[20];
1150 struct object *obj;
1151
1152 if (get_sha1_hex(hex, sha1) != 0)
1153 return;
1154
1155 obj = lookup_object(sha1);
1156 if (!obj)
1157 obj = parse_object(sha1);
1158
1159 /* Ignore remote objects that don't exist locally */
1160 if (!obj)
1161 return;
1162
1163 obj->flags |= REMOTE;
1164 if (!object_list_contains(objects, obj))
1165 object_list_insert(obj, &objects);
1166 }
1167
1168 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1169 {
1170 int *lock_flags = (int *)ctx->userData;
1171
1172 if (tag_closed) {
1173 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1174 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1175 (*lock_flags & DAV_PROP_LOCKWR)) {
1176 *lock_flags |= DAV_LOCK_OK;
1177 }
1178 *lock_flags &= DAV_LOCK_OK;
1179 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1180 *lock_flags |= DAV_PROP_LOCKWR;
1181 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1182 *lock_flags |= DAV_PROP_LOCKEX;
1183 }
1184 }
1185 }
1186
1187 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1188 {
1189 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1190
1191 if (tag_closed && ctx->cdata) {
1192 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1193 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1194 strcpy(lock->owner, ctx->cdata);
1195 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1196 if (!prefixcmp(ctx->cdata, "Second-"))
1197 lock->timeout =
1198 strtol(ctx->cdata + 7, NULL, 10);
1199 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1200 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1201 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1202 strcpy(lock->token, ctx->cdata + 16);
1203 }
1204 }
1205 }
1206 }
1207
1208 static void one_remote_ref(char *refname);
1209
1210 static void
1211 xml_start_tag(void *userData, const char *name, const char **atts)
1212 {
1213 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1214 const char *c = strchr(name, ':');
1215 int new_len;
1216
1217 if (c == NULL)
1218 c = name;
1219 else
1220 c++;
1221
1222 new_len = strlen(ctx->name) + strlen(c) + 2;
1223
1224 if (new_len > ctx->len) {
1225 ctx->name = xrealloc(ctx->name, new_len);
1226 ctx->len = new_len;
1227 }
1228 strcat(ctx->name, ".");
1229 strcat(ctx->name, c);
1230
1231 free(ctx->cdata);
1232 ctx->cdata = NULL;
1233
1234 ctx->userFunc(ctx, 0);
1235 }
1236
1237 static void
1238 xml_end_tag(void *userData, const char *name)
1239 {
1240 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1241 const char *c = strchr(name, ':');
1242 char *ep;
1243
1244 ctx->userFunc(ctx, 1);
1245
1246 if (c == NULL)
1247 c = name;
1248 else
1249 c++;
1250
1251 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1252 *ep = 0;
1253 }
1254
1255 static void
1256 xml_cdata(void *userData, const XML_Char *s, int len)
1257 {
1258 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1259 free(ctx->cdata);
1260 ctx->cdata = xmemdupz(s, len);
1261 }
1262
1263 static struct remote_lock *lock_remote(const char *path, long timeout)
1264 {
1265 struct active_request_slot *slot;
1266 struct slot_results results;
1267 struct buffer out_buffer = { STRBUF_INIT, 0 };
1268 struct strbuf in_buffer = STRBUF_INIT;
1269 char *url;
1270 char *ep;
1271 char timeout_header[25];
1272 struct remote_lock *lock = NULL;
1273 struct curl_slist *dav_headers = NULL;
1274 struct xml_ctx ctx;
1275
1276 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1277 sprintf(url, "%s%s", remote->url, path);
1278
1279 /* Make sure leading directories exist for the remote ref */
1280 ep = strchr(url + strlen(remote->url) + 1, '/');
1281 while (ep) {
1282 *ep = 0;
1283 slot = get_active_slot();
1284 slot->results = &results;
1285 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1286 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1287 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1288 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1289 if (start_active_slot(slot)) {
1290 run_active_slot(slot);
1291 if (results.curl_result != CURLE_OK &&
1292 results.http_code != 405) {
1293 fprintf(stderr,
1294 "Unable to create branch path %s\n",
1295 url);
1296 free(url);
1297 return NULL;
1298 }
1299 } else {
1300 fprintf(stderr, "Unable to start MKCOL request\n");
1301 free(url);
1302 return NULL;
1303 }
1304 *ep = '/';
1305 ep = strchr(ep + 1, '/');
1306 }
1307
1308 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1309
1310 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1311 dav_headers = curl_slist_append(dav_headers, timeout_header);
1312 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1313
1314 slot = get_active_slot();
1315 slot->results = &results;
1316 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1317 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1318 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1319 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1320 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1321 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1322 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1323 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1324 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1325
1326 lock = xcalloc(1, sizeof(*lock));
1327 lock->timeout = -1;
1328
1329 if (start_active_slot(slot)) {
1330 run_active_slot(slot);
1331 if (results.curl_result == CURLE_OK) {
1332 XML_Parser parser = XML_ParserCreate(NULL);
1333 enum XML_Status result;
1334 ctx.name = xcalloc(10, 1);
1335 ctx.len = 0;
1336 ctx.cdata = NULL;
1337 ctx.userFunc = handle_new_lock_ctx;
1338 ctx.userData = lock;
1339 XML_SetUserData(parser, &ctx);
1340 XML_SetElementHandler(parser, xml_start_tag,
1341 xml_end_tag);
1342 XML_SetCharacterDataHandler(parser, xml_cdata);
1343 result = XML_Parse(parser, in_buffer.buf,
1344 in_buffer.len, 1);
1345 free(ctx.name);
1346 if (result != XML_STATUS_OK) {
1347 fprintf(stderr, "XML error: %s\n",
1348 XML_ErrorString(
1349 XML_GetErrorCode(parser)));
1350 lock->timeout = -1;
1351 }
1352 XML_ParserFree(parser);
1353 }
1354 } else {
1355 fprintf(stderr, "Unable to start LOCK request\n");
1356 }
1357
1358 curl_slist_free_all(dav_headers);
1359 strbuf_release(&out_buffer.buf);
1360 strbuf_release(&in_buffer);
1361
1362 if (lock->token == NULL || lock->timeout <= 0) {
1363 if (lock->token != NULL)
1364 free(lock->token);
1365 if (lock->owner != NULL)
1366 free(lock->owner);
1367 free(url);
1368 free(lock);
1369 lock = NULL;
1370 } else {
1371 lock->url = url;
1372 lock->start_time = time(NULL);
1373 lock->next = remote->locks;
1374 remote->locks = lock;
1375 }
1376
1377 return lock;
1378 }
1379
1380 static int unlock_remote(struct remote_lock *lock)
1381 {
1382 struct active_request_slot *slot;
1383 struct slot_results results;
1384 struct remote_lock *prev = remote->locks;
1385 char *lock_token_header;
1386 struct curl_slist *dav_headers = NULL;
1387 int rc = 0;
1388
1389 lock_token_header = xmalloc(strlen(lock->token) + 31);
1390 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1391 lock->token);
1392 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1393
1394 slot = get_active_slot();
1395 slot->results = &results;
1396 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1397 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1398 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1399 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1400
1401 if (start_active_slot(slot)) {
1402 run_active_slot(slot);
1403 if (results.curl_result == CURLE_OK)
1404 rc = 1;
1405 else
1406 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1407 results.http_code);
1408 } else {
1409 fprintf(stderr, "Unable to start UNLOCK request\n");
1410 }
1411
1412 curl_slist_free_all(dav_headers);
1413 free(lock_token_header);
1414
1415 if (remote->locks == lock) {
1416 remote->locks = lock->next;
1417 } else {
1418 while (prev && prev->next != lock)
1419 prev = prev->next;
1420 if (prev)
1421 prev->next = prev->next->next;
1422 }
1423
1424 if (lock->owner != NULL)
1425 free(lock->owner);
1426 free(lock->url);
1427 free(lock->token);
1428 free(lock);
1429
1430 return rc;
1431 }
1432
1433 static void remote_ls(const char *path, int flags,
1434 void (*userFunc)(struct remote_ls_ctx *ls),
1435 void *userData);
1436
1437 static void process_ls_object(struct remote_ls_ctx *ls)
1438 {
1439 unsigned int *parent = (unsigned int *)ls->userData;
1440 char *path = ls->dentry_name;
1441 char *obj_hex;
1442
1443 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1444 remote_dir_exists[*parent] = 1;
1445 return;
1446 }
1447
1448 if (strlen(path) != 49)
1449 return;
1450 path += 8;
1451 obj_hex = xmalloc(strlen(path));
1452 /* NB: path is not null-terminated, can not use strlcpy here */
1453 memcpy(obj_hex, path, 2);
1454 strcpy(obj_hex + 2, path + 3);
1455 one_remote_object(obj_hex);
1456 free(obj_hex);
1457 }
1458
1459 static void process_ls_ref(struct remote_ls_ctx *ls)
1460 {
1461 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1462 fprintf(stderr, " %s\n", ls->dentry_name);
1463 return;
1464 }
1465
1466 if (!(ls->dentry_flags & IS_DIR))
1467 one_remote_ref(ls->dentry_name);
1468 }
1469
1470 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1471 {
1472 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1473
1474 if (tag_closed) {
1475 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1476 if (ls->dentry_flags & IS_DIR) {
1477 if (ls->flags & PROCESS_DIRS) {
1478 ls->userFunc(ls);
1479 }
1480 if (strcmp(ls->dentry_name, ls->path) &&
1481 ls->flags & RECURSIVE) {
1482 remote_ls(ls->dentry_name,
1483 ls->flags,
1484 ls->userFunc,
1485 ls->userData);
1486 }
1487 } else if (ls->flags & PROCESS_FILES) {
1488 ls->userFunc(ls);
1489 }
1490 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1491 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1492 remote->path_len + 1);
1493 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1494 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1495 ls->dentry_flags |= IS_DIR;
1496 }
1497 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1498 free(ls->dentry_name);
1499 ls->dentry_name = NULL;
1500 ls->dentry_flags = 0;
1501 }
1502 }
1503
1504 static void remote_ls(const char *path, int flags,
1505 void (*userFunc)(struct remote_ls_ctx *ls),
1506 void *userData)
1507 {
1508 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1509 struct active_request_slot *slot;
1510 struct slot_results results;
1511 struct strbuf in_buffer = STRBUF_INIT;
1512 struct buffer out_buffer = { STRBUF_INIT, 0 };
1513 struct curl_slist *dav_headers = NULL;
1514 struct xml_ctx ctx;
1515 struct remote_ls_ctx ls;
1516
1517 ls.flags = flags;
1518 ls.path = xstrdup(path);
1519 ls.dentry_name = NULL;
1520 ls.dentry_flags = 0;
1521 ls.userData = userData;
1522 ls.userFunc = userFunc;
1523
1524 sprintf(url, "%s%s", remote->url, path);
1525
1526 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1527
1528 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1529 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1530
1531 slot = get_active_slot();
1532 slot->results = &results;
1533 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1534 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1535 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1536 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1537 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1538 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1539 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1540 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1541 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1542
1543 if (start_active_slot(slot)) {
1544 run_active_slot(slot);
1545 if (results.curl_result == CURLE_OK) {
1546 XML_Parser parser = XML_ParserCreate(NULL);
1547 enum XML_Status result;
1548 ctx.name = xcalloc(10, 1);
1549 ctx.len = 0;
1550 ctx.cdata = NULL;
1551 ctx.userFunc = handle_remote_ls_ctx;
1552 ctx.userData = &ls;
1553 XML_SetUserData(parser, &ctx);
1554 XML_SetElementHandler(parser, xml_start_tag,
1555 xml_end_tag);
1556 XML_SetCharacterDataHandler(parser, xml_cdata);
1557 result = XML_Parse(parser, in_buffer.buf,
1558 in_buffer.len, 1);
1559 free(ctx.name);
1560
1561 if (result != XML_STATUS_OK) {
1562 fprintf(stderr, "XML error: %s\n",
1563 XML_ErrorString(
1564 XML_GetErrorCode(parser)));
1565 }
1566 XML_ParserFree(parser);
1567 }
1568 } else {
1569 fprintf(stderr, "Unable to start PROPFIND request\n");
1570 }
1571
1572 free(ls.path);
1573 free(url);
1574 strbuf_release(&out_buffer.buf);
1575 strbuf_release(&in_buffer);
1576 curl_slist_free_all(dav_headers);
1577 }
1578
1579 static void get_remote_object_list(unsigned char parent)
1580 {
1581 char path[] = "objects/XX/";
1582 static const char hex[] = "0123456789abcdef";
1583 unsigned int val = parent;
1584
1585 path[8] = hex[val >> 4];
1586 path[9] = hex[val & 0xf];
1587 remote_dir_exists[val] = 0;
1588 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1589 process_ls_object, &val);
1590 }
1591
1592 static int locking_available(void)
1593 {
1594 struct active_request_slot *slot;
1595 struct slot_results results;
1596 struct strbuf in_buffer = STRBUF_INIT;
1597 struct buffer out_buffer = { STRBUF_INIT, 0 };
1598 struct curl_slist *dav_headers = NULL;
1599 struct xml_ctx ctx;
1600 int lock_flags = 0;
1601
1602 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1603
1604 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1605 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1606
1607 slot = get_active_slot();
1608 slot->results = &results;
1609 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1610 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1611 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1612 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1613 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1614 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1615 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1616 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1617 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1618
1619 if (start_active_slot(slot)) {
1620 run_active_slot(slot);
1621 if (results.curl_result == CURLE_OK) {
1622 XML_Parser parser = XML_ParserCreate(NULL);
1623 enum XML_Status result;
1624 ctx.name = xcalloc(10, 1);
1625 ctx.len = 0;
1626 ctx.cdata = NULL;
1627 ctx.userFunc = handle_lockprop_ctx;
1628 ctx.userData = &lock_flags;
1629 XML_SetUserData(parser, &ctx);
1630 XML_SetElementHandler(parser, xml_start_tag,
1631 xml_end_tag);
1632 result = XML_Parse(parser, in_buffer.buf,
1633 in_buffer.len, 1);
1634 free(ctx.name);
1635
1636 if (result != XML_STATUS_OK) {
1637 fprintf(stderr, "XML error: %s\n",
1638 XML_ErrorString(
1639 XML_GetErrorCode(parser)));
1640 lock_flags = 0;
1641 }
1642 XML_ParserFree(parser);
1643 }
1644 } else {
1645 fprintf(stderr, "Unable to start PROPFIND request\n");
1646 }
1647
1648 strbuf_release(&out_buffer.buf);
1649 strbuf_release(&in_buffer);
1650 curl_slist_free_all(dav_headers);
1651
1652 return lock_flags;
1653 }
1654
1655 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1656 {
1657 struct object_list *entry = xmalloc(sizeof(struct object_list));
1658 entry->item = obj;
1659 entry->next = *p;
1660 *p = entry;
1661 return &entry->next;
1662 }
1663
1664 static struct object_list **process_blob(struct blob *blob,
1665 struct object_list **p,
1666 struct name_path *path,
1667 const char *name)
1668 {
1669 struct object *obj = &blob->object;
1670
1671 obj->flags |= LOCAL;
1672
1673 if (obj->flags & (UNINTERESTING | SEEN))
1674 return p;
1675
1676 obj->flags |= SEEN;
1677 return add_one_object(obj, p);
1678 }
1679
1680 static struct object_list **process_tree(struct tree *tree,
1681 struct object_list **p,
1682 struct name_path *path,
1683 const char *name)
1684 {
1685 struct object *obj = &tree->object;
1686 struct tree_desc desc;
1687 struct name_entry entry;
1688 struct name_path me;
1689
1690 obj->flags |= LOCAL;
1691
1692 if (obj->flags & (UNINTERESTING | SEEN))
1693 return p;
1694 if (parse_tree(tree) < 0)
1695 die("bad tree object %s", sha1_to_hex(obj->sha1));
1696
1697 obj->flags |= SEEN;
1698 name = xstrdup(name);
1699 p = add_one_object(obj, p);
1700 me.up = path;
1701 me.elem = name;
1702 me.elem_len = strlen(name);
1703
1704 init_tree_desc(&desc, tree->buffer, tree->size);
1705
1706 while (tree_entry(&desc, &entry)) {
1707 if (S_ISDIR(entry.mode))
1708 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1709 else
1710 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1711 }
1712 free(tree->buffer);
1713 tree->buffer = NULL;
1714 return p;
1715 }
1716
1717 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1718 {
1719 int i;
1720 struct commit *commit;
1721 struct object_list **p = &objects;
1722 int count = 0;
1723
1724 while ((commit = get_revision(revs)) != NULL) {
1725 p = process_tree(commit->tree, p, NULL, "");
1726 commit->object.flags |= LOCAL;
1727 if (!(commit->object.flags & UNINTERESTING))
1728 count += add_send_request(&commit->object, lock);
1729 }
1730
1731 for (i = 0; i < revs->pending.nr; i++) {
1732 struct object_array_entry *entry = revs->pending.objects + i;
1733 struct object *obj = entry->item;
1734 const char *name = entry->name;
1735
1736 if (obj->flags & (UNINTERESTING | SEEN))
1737 continue;
1738 if (obj->type == OBJ_TAG) {
1739 obj->flags |= SEEN;
1740 p = add_one_object(obj, p);
1741 continue;
1742 }
1743 if (obj->type == OBJ_TREE) {
1744 p = process_tree((struct tree *)obj, p, NULL, name);
1745 continue;
1746 }
1747 if (obj->type == OBJ_BLOB) {
1748 p = process_blob((struct blob *)obj, p, NULL, name);
1749 continue;
1750 }
1751 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1752 }
1753
1754 while (objects) {
1755 if (!(objects->item->flags & UNINTERESTING))
1756 count += add_send_request(objects->item, lock);
1757 objects = objects->next;
1758 }
1759
1760 return count;
1761 }
1762
1763 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1764 {
1765 struct active_request_slot *slot;
1766 struct slot_results results;
1767 char *if_header;
1768 struct buffer out_buffer = { STRBUF_INIT, 0 };
1769 struct curl_slist *dav_headers = NULL;
1770
1771 if_header = xmalloc(strlen(lock->token) + 25);
1772 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1773 dav_headers = curl_slist_append(dav_headers, if_header);
1774
1775 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1776
1777 slot = get_active_slot();
1778 slot->results = &results;
1779 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1780 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1781 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1782 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1783 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1784 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1785 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1786 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1787 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1788
1789 if (start_active_slot(slot)) {
1790 run_active_slot(slot);
1791 strbuf_release(&out_buffer.buf);
1792 free(if_header);
1793 if (results.curl_result != CURLE_OK) {
1794 fprintf(stderr,
1795 "PUT error: curl result=%d, HTTP code=%ld\n",
1796 results.curl_result, results.http_code);
1797 /* We should attempt recovery? */
1798 return 0;
1799 }
1800 } else {
1801 strbuf_release(&out_buffer.buf);
1802 free(if_header);
1803 fprintf(stderr, "Unable to start PUT request\n");
1804 return 0;
1805 }
1806
1807 return 1;
1808 }
1809
1810 static struct ref *local_refs, **local_tail;
1811 static struct ref *remote_refs, **remote_tail;
1812
1813 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1814 {
1815 struct ref *ref;
1816 int len = strlen(refname) + 1;
1817 ref = xcalloc(1, sizeof(*ref) + len);
1818 hashcpy(ref->new_sha1, sha1);
1819 memcpy(ref->name, refname, len);
1820 *local_tail = ref;
1821 local_tail = &ref->next;
1822 return 0;
1823 }
1824
1825 static void one_remote_ref(char *refname)
1826 {
1827 struct ref *ref;
1828 unsigned char remote_sha1[20];
1829 struct object *obj;
1830 int len = strlen(refname) + 1;
1831
1832 if (fetch_ref(refname, remote_sha1) != 0) {
1833 fprintf(stderr,
1834 "Unable to fetch ref %s from %s\n",
1835 refname, remote->url);
1836 return;
1837 }
1838
1839 /*
1840 * Fetch a copy of the object if it doesn't exist locally - it
1841 * may be required for updating server info later.
1842 */
1843 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1844 obj = lookup_unknown_object(remote_sha1);
1845 if (obj) {
1846 fprintf(stderr, " fetch %s for %s\n",
1847 sha1_to_hex(remote_sha1), refname);
1848 add_fetch_request(obj);
1849 }
1850 }
1851
1852 ref = xcalloc(1, sizeof(*ref) + len);
1853 hashcpy(ref->old_sha1, remote_sha1);
1854 memcpy(ref->name, refname, len);
1855 *remote_tail = ref;
1856 remote_tail = &ref->next;
1857 }
1858
1859 static void get_local_heads(void)
1860 {
1861 local_tail = &local_refs;
1862 for_each_ref(one_local_ref, NULL);
1863 }
1864
1865 static void get_dav_remote_heads(void)
1866 {
1867 remote_tail = &remote_refs;
1868 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1869 }
1870
1871 static int is_zero_sha1(const unsigned char *sha1)
1872 {
1873 int i;
1874
1875 for (i = 0; i < 20; i++) {
1876 if (*sha1++)
1877 return 0;
1878 }
1879 return 1;
1880 }
1881
1882 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1883 {
1884 while (list) {
1885 struct commit_list *temp = list;
1886 temp->item->object.flags &= ~mark;
1887 list = temp->next;
1888 free(temp);
1889 }
1890 }
1891
1892 static int ref_newer(const unsigned char *new_sha1,
1893 const unsigned char *old_sha1)
1894 {
1895 struct object *o;
1896 struct commit *old, *new;
1897 struct commit_list *list, *used;
1898 int found = 0;
1899
1900 /* Both new and old must be commit-ish and new is descendant of
1901 * old. Otherwise we require --force.
1902 */
1903 o = deref_tag(parse_object(old_sha1), NULL, 0);
1904 if (!o || o->type != OBJ_COMMIT)
1905 return 0;
1906 old = (struct commit *) o;
1907
1908 o = deref_tag(parse_object(new_sha1), NULL, 0);
1909 if (!o || o->type != OBJ_COMMIT)
1910 return 0;
1911 new = (struct commit *) o;
1912
1913 if (parse_commit(new) < 0)
1914 return 0;
1915
1916 used = list = NULL;
1917 commit_list_insert(new, &list);
1918 while (list) {
1919 new = pop_most_recent_commit(&list, TMP_MARK);
1920 commit_list_insert(new, &used);
1921 if (new == old) {
1922 found = 1;
1923 break;
1924 }
1925 }
1926 unmark_and_free(list, TMP_MARK);
1927 unmark_and_free(used, TMP_MARK);
1928 return found;
1929 }
1930
1931 static void mark_edge_parents_uninteresting(struct commit *commit)
1932 {
1933 struct commit_list *parents;
1934
1935 for (parents = commit->parents; parents; parents = parents->next) {
1936 struct commit *parent = parents->item;
1937 if (!(parent->object.flags & UNINTERESTING))
1938 continue;
1939 mark_tree_uninteresting(parent->tree);
1940 }
1941 }
1942
1943 static void mark_edges_uninteresting(struct commit_list *list)
1944 {
1945 for ( ; list; list = list->next) {
1946 struct commit *commit = list->item;
1947
1948 if (commit->object.flags & UNINTERESTING) {
1949 mark_tree_uninteresting(commit->tree);
1950 continue;
1951 }
1952 mark_edge_parents_uninteresting(commit);
1953 }
1954 }
1955
1956 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1957 {
1958 struct strbuf *buf = (struct strbuf *)ls->userData;
1959 unsigned char remote_sha1[20];
1960 struct object *o;
1961 int len;
1962 char *ref_info;
1963
1964 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
1965 fprintf(stderr,
1966 "Unable to fetch ref %s from %s\n",
1967 ls->dentry_name, remote->url);
1968 aborted = 1;
1969 return;
1970 }
1971
1972 o = parse_object(remote_sha1);
1973 if (!o) {
1974 fprintf(stderr,
1975 "Unable to parse object %s for remote ref %s\n",
1976 sha1_to_hex(remote_sha1), ls->dentry_name);
1977 aborted = 1;
1978 return;
1979 }
1980
1981 len = strlen(ls->dentry_name) + 42;
1982 ref_info = xcalloc(len + 1, 1);
1983 sprintf(ref_info, "%s %s\n",
1984 sha1_to_hex(remote_sha1), ls->dentry_name);
1985 fwrite_buffer(ref_info, 1, len, buf);
1986 free(ref_info);
1987
1988 if (o->type == OBJ_TAG) {
1989 o = deref_tag(o, ls->dentry_name, 0);
1990 if (o) {
1991 len = strlen(ls->dentry_name) + 45;
1992 ref_info = xcalloc(len + 1, 1);
1993 sprintf(ref_info, "%s %s^{}\n",
1994 sha1_to_hex(o->sha1), ls->dentry_name);
1995 fwrite_buffer(ref_info, 1, len, buf);
1996 free(ref_info);
1997 }
1998 }
1999 }
2000
2001 static void update_remote_info_refs(struct remote_lock *lock)
2002 {
2003 struct buffer buffer = { STRBUF_INIT, 0 };
2004 struct active_request_slot *slot;
2005 struct slot_results results;
2006 char *if_header;
2007 struct curl_slist *dav_headers = NULL;
2008
2009 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2010 add_remote_info_ref, &buffer.buf);
2011 if (!aborted) {
2012 if_header = xmalloc(strlen(lock->token) + 25);
2013 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2014 dav_headers = curl_slist_append(dav_headers, if_header);
2015
2016 slot = get_active_slot();
2017 slot->results = &results;
2018 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2019 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
2020 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2021 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2022 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2023 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2024 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2025 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2026 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2027
2028 if (start_active_slot(slot)) {
2029 run_active_slot(slot);
2030 if (results.curl_result != CURLE_OK) {
2031 fprintf(stderr,
2032 "PUT error: curl result=%d, HTTP code=%ld\n",
2033 results.curl_result, results.http_code);
2034 }
2035 }
2036 free(if_header);
2037 }
2038 strbuf_release(&buffer.buf);
2039 }
2040
2041 static int remote_exists(const char *path)
2042 {
2043 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2044 struct active_request_slot *slot;
2045 struct slot_results results;
2046
2047 sprintf(url, "%s%s", remote->url, path);
2048
2049 slot = get_active_slot();
2050 slot->results = &results;
2051 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2052 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2053
2054 if (start_active_slot(slot)) {
2055 run_active_slot(slot);
2056 free(url);
2057 if (results.http_code == 404)
2058 return 0;
2059 else if (results.curl_result == CURLE_OK)
2060 return 1;
2061 else
2062 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2063 } else {
2064 free(url);
2065 fprintf(stderr, "Unable to start HEAD request\n");
2066 }
2067
2068 return -1;
2069 }
2070
2071 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2072 {
2073 char *url;
2074 struct strbuf buffer = STRBUF_INIT;
2075 struct active_request_slot *slot;
2076 struct slot_results results;
2077
2078 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2079 sprintf(url, "%s%s", remote->url, path);
2080
2081 slot = get_active_slot();
2082 slot->results = &results;
2083 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2084 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2085 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2086 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2087 if (start_active_slot(slot)) {
2088 run_active_slot(slot);
2089 if (results.curl_result != CURLE_OK) {
2090 die("Couldn't get %s for remote symref\n%s",
2091 url, curl_errorstr);
2092 }
2093 } else {
2094 die("Unable to start remote symref request");
2095 }
2096 free(url);
2097
2098 if (*symref != NULL)
2099 free(*symref);
2100 *symref = NULL;
2101 hashclr(sha1);
2102
2103 if (buffer.len == 0)
2104 return;
2105
2106 /* If it's a symref, set the refname; otherwise try for a sha1 */
2107 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2108 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2109 } else {
2110 get_sha1_hex(buffer.buf, sha1);
2111 }
2112
2113 strbuf_release(&buffer);
2114 }
2115
2116 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2117 {
2118 struct commit *head = lookup_commit(head_sha1);
2119 struct commit *branch = lookup_commit(branch_sha1);
2120 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2121
2122 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2123 }
2124
2125 static int delete_remote_branch(char *pattern, int force)
2126 {
2127 struct ref *refs = remote_refs;
2128 struct ref *remote_ref = NULL;
2129 unsigned char head_sha1[20];
2130 char *symref = NULL;
2131 int match;
2132 int patlen = strlen(pattern);
2133 int i;
2134 struct active_request_slot *slot;
2135 struct slot_results results;
2136 char *url;
2137
2138 /* Find the remote branch(es) matching the specified branch name */
2139 for (match = 0; refs; refs = refs->next) {
2140 char *name = refs->name;
2141 int namelen = strlen(name);
2142 if (namelen < patlen ||
2143 memcmp(name + namelen - patlen, pattern, patlen))
2144 continue;
2145 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2146 continue;
2147 match++;
2148 remote_ref = refs;
2149 }
2150 if (match == 0)
2151 return error("No remote branch matches %s", pattern);
2152 if (match != 1)
2153 return error("More than one remote branch matches %s",
2154 pattern);
2155
2156 /*
2157 * Remote HEAD must be a symref (not exactly foolproof; a remote
2158 * symlink to a symref will look like a symref)
2159 */
2160 fetch_symref("HEAD", &symref, head_sha1);
2161 if (!symref)
2162 return error("Remote HEAD is not a symref");
2163
2164 /* Remote branch must not be the remote HEAD */
2165 for (i=0; symref && i<MAXDEPTH; i++) {
2166 if (!strcmp(remote_ref->name, symref))
2167 return error("Remote branch %s is the current HEAD",
2168 remote_ref->name);
2169 fetch_symref(symref, &symref, head_sha1);
2170 }
2171
2172 /* Run extra sanity checks if delete is not forced */
2173 if (!force) {
2174 /* Remote HEAD must resolve to a known object */
2175 if (symref)
2176 return error("Remote HEAD symrefs too deep");
2177 if (is_zero_sha1(head_sha1))
2178 return error("Unable to resolve remote HEAD");
2179 if (!has_sha1_file(head_sha1))
2180 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2181
2182 /* Remote branch must resolve to a known object */
2183 if (is_zero_sha1(remote_ref->old_sha1))
2184 return error("Unable to resolve remote branch %s",
2185 remote_ref->name);
2186 if (!has_sha1_file(remote_ref->old_sha1))
2187 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));
2188
2189 /* Remote branch must be an ancestor of remote HEAD */
2190 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2191 return error("The branch '%s' is not an ancestor "
2192 "of your current HEAD.\n"
2193 "If you are sure you want to delete it,"
2194 " run:\n\t'git http-push -D %s %s'",
2195 remote_ref->name, remote->url, pattern);
2196 }
2197 }
2198
2199 /* Send delete request */
2200 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2201 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2202 sprintf(url, "%s%s", remote->url, remote_ref->name);
2203 slot = get_active_slot();
2204 slot->results = &results;
2205 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2206 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2207 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2208 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2209 if (start_active_slot(slot)) {
2210 run_active_slot(slot);
2211 free(url);
2212 if (results.curl_result != CURLE_OK)
2213 return error("DELETE request failed (%d/%ld)\n",
2214 results.curl_result, results.http_code);
2215 } else {
2216 free(url);
2217 return error("Unable to start DELETE request");
2218 }
2219
2220 return 0;
2221 }
2222
2223 int main(int argc, char **argv)
2224 {
2225 struct transfer_request *request;
2226 struct transfer_request *next_request;
2227 int nr_refspec = 0;
2228 char **refspec = NULL;
2229 struct remote_lock *ref_lock = NULL;
2230 struct remote_lock *info_ref_lock = NULL;
2231 struct rev_info revs;
2232 int delete_branch = 0;
2233 int force_delete = 0;
2234 int objects_to_send;
2235 int rc = 0;
2236 int i;
2237 int new_refs;
2238 struct ref *ref;
2239
2240 setup_git_directory();
2241
2242 remote = xcalloc(sizeof(*remote), 1);
2243
2244 argv++;
2245 for (i = 1; i < argc; i++, argv++) {
2246 char *arg = *argv;
2247
2248 if (*arg == '-') {
2249 if (!strcmp(arg, "--all")) {
2250 push_all = MATCH_REFS_ALL;
2251 continue;
2252 }
2253 if (!strcmp(arg, "--force")) {
2254 force_all = 1;
2255 continue;
2256 }
2257 if (!strcmp(arg, "--dry-run")) {
2258 dry_run = 1;
2259 continue;
2260 }
2261 if (!strcmp(arg, "--verbose")) {
2262 push_verbosely = 1;
2263 continue;
2264 }
2265 if (!strcmp(arg, "-d")) {
2266 delete_branch = 1;
2267 continue;
2268 }
2269 if (!strcmp(arg, "-D")) {
2270 delete_branch = 1;
2271 force_delete = 1;
2272 continue;
2273 }
2274 }
2275 if (!remote->url) {
2276 char *path = strstr(arg, "//");
2277 remote->url = arg;
2278 if (path) {
2279 path = strchr(path+2, '/');
2280 if (path)
2281 remote->path_len = strlen(path);
2282 }
2283 continue;
2284 }
2285 refspec = argv;
2286 nr_refspec = argc - i;
2287 break;
2288 }
2289
2290 if (!remote->url)
2291 usage(http_push_usage);
2292
2293 if (delete_branch && nr_refspec != 1)
2294 die("You must specify only one branch name when deleting a remote branch");
2295
2296 memset(remote_dir_exists, -1, 256);
2297
2298 http_init();
2299
2300 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2301
2302 /* Verify DAV compliance/lock support */
2303 if (!locking_available()) {
2304 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2305 rc = 1;
2306 goto cleanup;
2307 }
2308
2309 /* Check whether the remote has server info files */
2310 remote->can_update_info_refs = 0;
2311 remote->has_info_refs = remote_exists("info/refs");
2312 remote->has_info_packs = remote_exists("objects/info/packs");
2313 if (remote->has_info_refs) {
2314 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2315 if (info_ref_lock)
2316 remote->can_update_info_refs = 1;
2317 }
2318 if (remote->has_info_packs)
2319 fetch_indices();
2320
2321 /* Get a list of all local and remote heads to validate refspecs */
2322 get_local_heads();
2323 fprintf(stderr, "Fetching remote heads...\n");
2324 get_dav_remote_heads();
2325
2326 /* Remove a remote branch if -d or -D was specified */
2327 if (delete_branch) {
2328 if (delete_remote_branch(refspec[0], force_delete) == -1)
2329 fprintf(stderr, "Unable to delete remote branch %s\n",
2330 refspec[0]);
2331 goto cleanup;
2332 }
2333
2334 /* match them up */
2335 if (!remote_tail)
2336 remote_tail = &remote_refs;
2337 if (match_refs(local_refs, remote_refs, &remote_tail,
2338 nr_refspec, (const char **) refspec, push_all))
2339 return -1;
2340 if (!remote_refs) {
2341 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2342 return 0;
2343 }
2344
2345 new_refs = 0;
2346 for (ref = remote_refs; ref; ref = ref->next) {
2347 char old_hex[60], *new_hex;
2348 const char *commit_argv[4];
2349 int commit_argc;
2350 char *new_sha1_hex, *old_sha1_hex;
2351
2352 if (!ref->peer_ref)
2353 continue;
2354 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2355 if (push_verbosely || 1)
2356 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2357 continue;
2358 }
2359
2360 if (!force_all &&
2361 !is_zero_sha1(ref->old_sha1) &&
2362 !ref->force) {
2363 if (!has_sha1_file(ref->old_sha1) ||
2364 !ref_newer(ref->peer_ref->new_sha1,
2365 ref->old_sha1)) {
2366 /*
2367 * We do not have the remote ref, or
2368 * we know that the remote ref is not
2369 * an ancestor of what we are trying to
2370 * push. Either way this can be losing
2371 * commits at the remote end and likely
2372 * we were not up to date to begin with.
2373 */
2374 error("remote '%s' is not an ancestor of\n"
2375 "local '%s'.\n"
2376 "Maybe you are not up-to-date and "
2377 "need to pull first?",
2378 ref->name,
2379 ref->peer_ref->name);
2380 rc = -2;
2381 continue;
2382 }
2383 }
2384 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2385 if (is_zero_sha1(ref->new_sha1)) {
2386 error("cannot happen anymore");
2387 rc = -3;
2388 continue;
2389 }
2390 new_refs++;
2391 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2392 new_hex = sha1_to_hex(ref->new_sha1);
2393
2394 fprintf(stderr, "updating '%s'", ref->name);
2395 if (strcmp(ref->name, ref->peer_ref->name))
2396 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2397 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2398 if (dry_run)
2399 continue;
2400
2401 /* Lock remote branch ref */
2402 ref_lock = lock_remote(ref->name, LOCK_TIME);
2403 if (ref_lock == NULL) {
2404 fprintf(stderr, "Unable to lock remote branch %s\n",
2405 ref->name);
2406 rc = 1;
2407 continue;
2408 }
2409
2410 /* Set up revision info for this refspec */
2411 commit_argc = 3;
2412 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2413 old_sha1_hex = NULL;
2414 commit_argv[1] = "--objects";
2415 commit_argv[2] = new_sha1_hex;
2416 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2417 old_sha1_hex = xmalloc(42);
2418 sprintf(old_sha1_hex, "^%s",
2419 sha1_to_hex(ref->old_sha1));
2420 commit_argv[3] = old_sha1_hex;
2421 commit_argc++;
2422 }
2423 init_revisions(&revs, setup_git_directory());
2424 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2425 free(new_sha1_hex);
2426 if (old_sha1_hex) {
2427 free(old_sha1_hex);
2428 commit_argv[1] = NULL;
2429 }
2430
2431 /* Generate a list of objects that need to be pushed */
2432 pushing = 0;
2433 prepare_revision_walk(&revs);
2434 mark_edges_uninteresting(revs.commits);
2435 objects_to_send = get_delta(&revs, ref_lock);
2436 finish_all_active_slots();
2437
2438 /* Push missing objects to remote, this would be a
2439 convenient time to pack them first if appropriate. */
2440 pushing = 1;
2441 if (objects_to_send)
2442 fprintf(stderr, " sending %d objects\n",
2443 objects_to_send);
2444 #ifdef USE_CURL_MULTI
2445 fill_active_slots();
2446 add_fill_function(NULL, fill_active_slot);
2447 #endif
2448 finish_all_active_slots();
2449
2450 /* Update the remote branch if all went well */
2451 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2452 rc = 1;
2453 goto unlock;
2454 }
2455
2456 unlock:
2457 if (!rc)
2458 fprintf(stderr, " done\n");
2459 unlock_remote(ref_lock);
2460 check_locks();
2461 }
2462
2463 /* Update remote server info if appropriate */
2464 if (remote->has_info_refs && new_refs) {
2465 if (info_ref_lock && remote->can_update_info_refs) {
2466 fprintf(stderr, "Updating remote server info\n");
2467 if (!dry_run)
2468 update_remote_info_refs(info_ref_lock);
2469 } else {
2470 fprintf(stderr, "Unable to update server info\n");
2471 }
2472 }
2473 if (info_ref_lock)
2474 unlock_remote(info_ref_lock);
2475
2476 cleanup:
2477 free(remote);
2478
2479 curl_slist_free_all(no_pragma_header);
2480
2481 http_cleanup();
2482
2483 request = request_queue_head;
2484 while (request != NULL) {
2485 next_request = request->next;
2486 release_request(request);
2487 request = next_request;
2488 }
2489
2490 return rc;
2491 }
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