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some doc updates
[git/peff.git] / http-push.c
blob0a15f5378288992826e7042a3b9dff92fef4c080
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "fetch.h"
5 #include "tag.h"
6 #include "blob.h"
7 #include "http.h"
8 #include "refs.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "exec_cmd.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, SEEK_SET, 0);
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 char type[20];
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", 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 void fill_active_slots(void)
798 {
799 struct transfer_request *request = request_queue_head;
800 struct transfer_request *next;
801 struct active_request_slot *slot = active_queue_head;
802 int num_transfers;
803
804 if (aborted)
805 return;
806
807 while (active_requests < max_requests && request != NULL) {
808 next = request->next;
809 if (request->state == NEED_FETCH) {
810 start_fetch_loose(request);
811 } else if (pushing && request->state == NEED_PUSH) {
812 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
813 start_put(request);
814 } else {
815 start_mkcol(request);
816 }
817 curl_multi_perform(curlm, &num_transfers);
818 }
819 request = next;
820 }
821
822 while (slot != NULL) {
823 if (!slot->in_use && slot->curl != NULL) {
824 curl_easy_cleanup(slot->curl);
825 slot->curl = NULL;
826 }
827 slot = slot->next;
828 }
829 }
830 #endif
831
832 static void get_remote_object_list(unsigned char parent);
833
834 static void add_fetch_request(struct object *obj)
835 {
836 struct transfer_request *request;
837
838 check_locks();
839
840 /*
841 * Don't fetch the object if it's known to exist locally
842 * or is already in the request queue
843 */
844 if (remote_dir_exists[obj->sha1[0]] == -1)
845 get_remote_object_list(obj->sha1[0]);
846 if (obj->flags & (LOCAL | FETCHING))
847 return;
848
849 obj->flags |= FETCHING;
850 request = xmalloc(sizeof(*request));
851 request->obj = obj;
852 request->url = NULL;
853 request->lock = NULL;
854 request->headers = NULL;
855 request->local_fileno = -1;
856 request->local_stream = NULL;
857 request->state = NEED_FETCH;
858 request->next = request_queue_head;
859 request_queue_head = request;
860
861 #ifdef USE_CURL_MULTI
862 fill_active_slots();
863 step_active_slots();
864 #endif
865 }
866
867 static int add_send_request(struct object *obj, struct remote_lock *lock)
868 {
869 struct transfer_request *request = request_queue_head;
870 struct packed_git *target;
871
872 /* Keep locks active */
873 check_locks();
874
875 /*
876 * Don't push the object if it's known to exist on the remote
877 * or is already in the request queue
878 */
879 if (remote_dir_exists[obj->sha1[0]] == -1)
880 get_remote_object_list(obj->sha1[0]);
881 if (obj->flags & (REMOTE | PUSHING))
882 return 0;
883 target = find_sha1_pack(obj->sha1, remote->packs);
884 if (target) {
885 obj->flags |= REMOTE;
886 return 0;
887 }
888
889 obj->flags |= PUSHING;
890 request = xmalloc(sizeof(*request));
891 request->obj = obj;
892 request->url = NULL;
893 request->lock = lock;
894 request->headers = NULL;
895 request->local_fileno = -1;
896 request->local_stream = NULL;
897 request->state = NEED_PUSH;
898 request->next = request_queue_head;
899 request_queue_head = request;
900
901 #ifdef USE_CURL_MULTI
902 fill_active_slots();
903 step_active_slots();
904 #endif
905
906 return 1;
907 }
908
909 static int fetch_index(unsigned char *sha1)
910 {
911 char *hex = sha1_to_hex(sha1);
912 char *filename;
913 char *url;
914 char tmpfile[PATH_MAX];
915 long prev_posn = 0;
916 char range[RANGE_HEADER_SIZE];
917 struct curl_slist *range_header = NULL;
918
919 FILE *indexfile;
920 struct active_request_slot *slot;
921 struct slot_results results;
922
923 /* Don't use the index if the pack isn't there */
924 url = xmalloc(strlen(remote->url) + 64);
925 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
926 slot = get_active_slot();
927 slot->results = &results;
928 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
929 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
930 if (start_active_slot(slot)) {
931 run_active_slot(slot);
932 if (results.curl_result != CURLE_OK) {
933 free(url);
934 return error("Unable to verify pack %s is available",
935 hex);
936 }
937 } else {
938 return error("Unable to start request");
939 }
940
941 if (has_pack_index(sha1))
942 return 0;
943
944 if (push_verbosely)
945 fprintf(stderr, "Getting index for pack %s\n", hex);
946
947 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
948
949 filename = sha1_pack_index_name(sha1);
950 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
951 indexfile = fopen(tmpfile, "a");
952 if (!indexfile)
953 return error("Unable to open local file %s for pack index",
954 filename);
955
956 slot = get_active_slot();
957 slot->results = &results;
958 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
960 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
961 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
962 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
963 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
964 slot->local = indexfile;
965
966 /* If there is data present from a previous transfer attempt,
967 resume where it left off */
968 prev_posn = ftell(indexfile);
969 if (prev_posn>0) {
970 if (push_verbosely)
971 fprintf(stderr,
972 "Resuming fetch of index for pack %s at byte %ld\n",
973 hex, prev_posn);
974 sprintf(range, "Range: bytes=%ld-", prev_posn);
975 range_header = curl_slist_append(range_header, range);
976 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
977 }
978
979 if (start_active_slot(slot)) {
980 run_active_slot(slot);
981 if (results.curl_result != CURLE_OK) {
982 free(url);
983 fclose(indexfile);
984 return error("Unable to get pack index %s\n%s", url,
985 curl_errorstr);
986 }
987 } else {
988 free(url);
989 fclose(indexfile);
990 return error("Unable to start request");
991 }
992
993 free(url);
994 fclose(indexfile);
995
996 return move_temp_to_file(tmpfile, filename);
997 }
998
999 static int setup_index(unsigned char *sha1)
1000 {
1001 struct packed_git *new_pack;
1002
1003 if (fetch_index(sha1))
1004 return -1;
1005
1006 new_pack = parse_pack_index(sha1);
1007 new_pack->next = remote->packs;
1008 remote->packs = new_pack;
1009 return 0;
1010 }
1011
1012 static int fetch_indices(void)
1013 {
1014 unsigned char sha1[20];
1015 char *url;
1016 struct buffer buffer;
1017 char *data;
1018 int i = 0;
1019
1020 struct active_request_slot *slot;
1021 struct slot_results results;
1022
1023 data = xcalloc(1, 4096);
1024 buffer.size = 4096;
1025 buffer.posn = 0;
1026 buffer.buffer = data;
1027
1028 if (push_verbosely)
1029 fprintf(stderr, "Getting pack list\n");
1030
1031 url = xmalloc(strlen(remote->url) + 20);
1032 sprintf(url, "%sobjects/info/packs", remote->url);
1033
1034 slot = get_active_slot();
1035 slot->results = &results;
1036 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1037 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1038 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1039 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1040 if (start_active_slot(slot)) {
1041 run_active_slot(slot);
1042 if (results.curl_result != CURLE_OK) {
1043 free(buffer.buffer);
1044 free(url);
1045 if (results.http_code == 404)
1046 return 0;
1047 else
1048 return error("%s", curl_errorstr);
1049 }
1050 } else {
1051 free(buffer.buffer);
1052 free(url);
1053 return error("Unable to start request");
1054 }
1055 free(url);
1056
1057 data = buffer.buffer;
1058 while (i < buffer.posn) {
1059 switch (data[i]) {
1060 case 'P':
1061 i++;
1062 if (i + 52 < buffer.posn &&
1063 !strncmp(data + i, " pack-", 6) &&
1064 !strncmp(data + i + 46, ".pack\n", 6)) {
1065 get_sha1_hex(data + i + 6, sha1);
1066 setup_index(sha1);
1067 i += 51;
1068 break;
1069 }
1070 default:
1071 while (data[i] != '\n')
1072 i++;
1073 }
1074 i++;
1075 }
1076
1077 free(buffer.buffer);
1078 return 0;
1079 }
1080
1081 static inline int needs_quote(int ch)
1082 {
1083 if (((ch >= 'A') && (ch <= 'Z'))
1084 || ((ch >= 'a') && (ch <= 'z'))
1085 || ((ch >= '0') && (ch <= '9'))
1086 || (ch == '/')
1087 || (ch == '-')
1088 || (ch == '.'))
1089 return 0;
1090 return 1;
1091 }
1092
1093 static inline int hex(int v)
1094 {
1095 if (v < 10) return '0' + v;
1096 else return 'A' + v - 10;
1097 }
1098
1099 static char *quote_ref_url(const char *base, const char *ref)
1100 {
1101 const char *cp;
1102 char *dp, *qref;
1103 int len, baselen, ch;
1104
1105 baselen = strlen(base);
1106 len = baselen + 1;
1107 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1108 if (needs_quote(ch))
1109 len += 2; /* extra two hex plus replacement % */
1110 qref = xmalloc(len);
1111 memcpy(qref, base, baselen);
1112 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1113 if (needs_quote(ch)) {
1114 *dp++ = '%';
1115 *dp++ = hex((ch >> 4) & 0xF);
1116 *dp++ = hex(ch & 0xF);
1117 }
1118 else
1119 *dp++ = ch;
1120 }
1121 *dp = 0;
1122
1123 return qref;
1124 }
1125
1126 int fetch_ref(char *ref, unsigned char *sha1)
1127 {
1128 char *url;
1129 char hex[42];
1130 struct buffer buffer;
1131 char *base = remote->url;
1132 struct active_request_slot *slot;
1133 struct slot_results results;
1134 buffer.size = 41;
1135 buffer.posn = 0;
1136 buffer.buffer = hex;
1137 hex[41] = '\0';
1138
1139 url = quote_ref_url(base, ref);
1140 slot = get_active_slot();
1141 slot->results = &results;
1142 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1143 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1144 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1145 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1146 if (start_active_slot(slot)) {
1147 run_active_slot(slot);
1148 if (results.curl_result != CURLE_OK)
1149 return error("Couldn't get %s for %s\n%s",
1150 url, ref, curl_errorstr);
1151 } else {
1152 return error("Unable to start request");
1153 }
1154
1155 hex[40] = '\0';
1156 get_sha1_hex(hex, sha1);
1157 return 0;
1158 }
1159
1160 static void one_remote_object(const char *hex)
1161 {
1162 unsigned char sha1[20];
1163 struct object *obj;
1164
1165 if (get_sha1_hex(hex, sha1) != 0)
1166 return;
1167
1168 obj = lookup_object(sha1);
1169 if (!obj)
1170 obj = parse_object(sha1);
1171
1172 /* Ignore remote objects that don't exist locally */
1173 if (!obj)
1174 return;
1175
1176 obj->flags |= REMOTE;
1177 if (!object_list_contains(objects, obj))
1178 object_list_insert(obj, &objects);
1179 }
1180
1181 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1182 {
1183 int *lock_flags = (int *)ctx->userData;
1184
1185 if (tag_closed) {
1186 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1187 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1188 (*lock_flags & DAV_PROP_LOCKWR)) {
1189 *lock_flags |= DAV_LOCK_OK;
1190 }
1191 *lock_flags &= DAV_LOCK_OK;
1192 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1193 *lock_flags |= DAV_PROP_LOCKWR;
1194 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1195 *lock_flags |= DAV_PROP_LOCKEX;
1196 }
1197 }
1198 }
1199
1200 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1201 {
1202 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1203
1204 if (tag_closed && ctx->cdata) {
1205 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1206 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1207 strcpy(lock->owner, ctx->cdata);
1208 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1209 if (!strncmp(ctx->cdata, "Second-", 7))
1210 lock->timeout =
1211 strtol(ctx->cdata + 7, NULL, 10);
1212 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1213 if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
1214 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1215 strcpy(lock->token, ctx->cdata + 16);
1216 }
1217 }
1218 }
1219 }
1220
1221 static void one_remote_ref(char *refname);
1222
1223 static void
1224 xml_start_tag(void *userData, const char *name, const char **atts)
1225 {
1226 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1227 const char *c = strchr(name, ':');
1228 int new_len;
1229
1230 if (c == NULL)
1231 c = name;
1232 else
1233 c++;
1234
1235 new_len = strlen(ctx->name) + strlen(c) + 2;
1236
1237 if (new_len > ctx->len) {
1238 ctx->name = xrealloc(ctx->name, new_len);
1239 ctx->len = new_len;
1240 }
1241 strcat(ctx->name, ".");
1242 strcat(ctx->name, c);
1243
1244 free(ctx->cdata);
1245 ctx->cdata = NULL;
1246
1247 ctx->userFunc(ctx, 0);
1248 }
1249
1250 static void
1251 xml_end_tag(void *userData, const char *name)
1252 {
1253 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1254 const char *c = strchr(name, ':');
1255 char *ep;
1256
1257 ctx->userFunc(ctx, 1);
1258
1259 if (c == NULL)
1260 c = name;
1261 else
1262 c++;
1263
1264 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1265 *ep = 0;
1266 }
1267
1268 static void
1269 xml_cdata(void *userData, const XML_Char *s, int len)
1270 {
1271 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1272 free(ctx->cdata);
1273 ctx->cdata = xmalloc(len + 1);
1274 strlcpy(ctx->cdata, s, len + 1);
1275 }
1276
1277 static struct remote_lock *lock_remote(const char *path, long timeout)
1278 {
1279 struct active_request_slot *slot;
1280 struct slot_results results;
1281 struct buffer out_buffer;
1282 struct buffer in_buffer;
1283 char *out_data;
1284 char *in_data;
1285 char *url;
1286 char *ep;
1287 char timeout_header[25];
1288 struct remote_lock *lock = NULL;
1289 XML_Parser parser = XML_ParserCreate(NULL);
1290 enum XML_Status result;
1291 struct curl_slist *dav_headers = NULL;
1292 struct xml_ctx ctx;
1293
1294 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1295 sprintf(url, "%s%s", remote->url, path);
1296
1297 /* Make sure leading directories exist for the remote ref */
1298 ep = strchr(url + strlen(remote->url) + 11, '/');
1299 while (ep) {
1300 *ep = 0;
1301 slot = get_active_slot();
1302 slot->results = &results;
1303 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1304 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1305 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1306 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1307 if (start_active_slot(slot)) {
1308 run_active_slot(slot);
1309 if (results.curl_result != CURLE_OK &&
1310 results.http_code != 405) {
1311 fprintf(stderr,
1312 "Unable to create branch path %s\n",
1313 url);
1314 free(url);
1315 return NULL;
1316 }
1317 } else {
1318 fprintf(stderr, "Unable to start MKCOL request\n");
1319 free(url);
1320 return NULL;
1321 }
1322 *ep = '/';
1323 ep = strchr(ep + 1, '/');
1324 }
1325
1326 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1327 out_data = xmalloc(out_buffer.size + 1);
1328 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1329 out_buffer.posn = 0;
1330 out_buffer.buffer = out_data;
1331
1332 in_buffer.size = 4096;
1333 in_data = xmalloc(in_buffer.size);
1334 in_buffer.posn = 0;
1335 in_buffer.buffer = in_data;
1336
1337 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1338 dav_headers = curl_slist_append(dav_headers, timeout_header);
1339 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1340
1341 slot = get_active_slot();
1342 slot->results = &results;
1343 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1344 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1345 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1346 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1347 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1348 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1349 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1350 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1351 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1352
1353 lock = xcalloc(1, sizeof(*lock));
1354 lock->timeout = -1;
1355
1356 if (start_active_slot(slot)) {
1357 run_active_slot(slot);
1358 if (results.curl_result == CURLE_OK) {
1359 ctx.name = xcalloc(10, 1);
1360 ctx.len = 0;
1361 ctx.cdata = NULL;
1362 ctx.userFunc = handle_new_lock_ctx;
1363 ctx.userData = lock;
1364 XML_SetUserData(parser, &ctx);
1365 XML_SetElementHandler(parser, xml_start_tag,
1366 xml_end_tag);
1367 XML_SetCharacterDataHandler(parser, xml_cdata);
1368 result = XML_Parse(parser, in_buffer.buffer,
1369 in_buffer.posn, 1);
1370 free(ctx.name);
1371 if (result != XML_STATUS_OK) {
1372 fprintf(stderr, "XML error: %s\n",
1373 XML_ErrorString(
1374 XML_GetErrorCode(parser)));
1375 lock->timeout = -1;
1376 }
1377 }
1378 } else {
1379 fprintf(stderr, "Unable to start LOCK request\n");
1380 }
1381
1382 curl_slist_free_all(dav_headers);
1383 free(out_data);
1384 free(in_data);
1385
1386 if (lock->token == NULL || lock->timeout <= 0) {
1387 if (lock->token != NULL)
1388 free(lock->token);
1389 if (lock->owner != NULL)
1390 free(lock->owner);
1391 free(url);
1392 free(lock);
1393 lock = NULL;
1394 } else {
1395 lock->url = url;
1396 lock->start_time = time(NULL);
1397 lock->next = remote->locks;
1398 remote->locks = lock;
1399 }
1400
1401 return lock;
1402 }
1403
1404 static int unlock_remote(struct remote_lock *lock)
1405 {
1406 struct active_request_slot *slot;
1407 struct slot_results results;
1408 struct remote_lock *prev = remote->locks;
1409 char *lock_token_header;
1410 struct curl_slist *dav_headers = NULL;
1411 int rc = 0;
1412
1413 lock_token_header = xmalloc(strlen(lock->token) + 31);
1414 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1415 lock->token);
1416 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1417
1418 slot = get_active_slot();
1419 slot->results = &results;
1420 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1421 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1422 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1423 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1424
1425 if (start_active_slot(slot)) {
1426 run_active_slot(slot);
1427 if (results.curl_result == CURLE_OK)
1428 rc = 1;
1429 else
1430 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1431 results.http_code);
1432 } else {
1433 fprintf(stderr, "Unable to start UNLOCK request\n");
1434 }
1435
1436 curl_slist_free_all(dav_headers);
1437 free(lock_token_header);
1438
1439 if (remote->locks == lock) {
1440 remote->locks = lock->next;
1441 } else {
1442 while (prev && prev->next != lock)
1443 prev = prev->next;
1444 if (prev)
1445 prev->next = prev->next->next;
1446 }
1447
1448 if (lock->owner != NULL)
1449 free(lock->owner);
1450 free(lock->url);
1451 free(lock->token);
1452 free(lock);
1453
1454 return rc;
1455 }
1456
1457 static void remote_ls(const char *path, int flags,
1458 void (*userFunc)(struct remote_ls_ctx *ls),
1459 void *userData);
1460
1461 static void process_ls_object(struct remote_ls_ctx *ls)
1462 {
1463 unsigned int *parent = (unsigned int *)ls->userData;
1464 char *path = ls->dentry_name;
1465 char *obj_hex;
1466
1467 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1468 remote_dir_exists[*parent] = 1;
1469 return;
1470 }
1471
1472 if (strlen(path) != 49)
1473 return;
1474 path += 8;
1475 obj_hex = xmalloc(strlen(path));
1476 strlcpy(obj_hex, path, 3);
1477 strcpy(obj_hex + 2, path + 3);
1478 one_remote_object(obj_hex);
1479 free(obj_hex);
1480 }
1481
1482 static void process_ls_ref(struct remote_ls_ctx *ls)
1483 {
1484 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1485 fprintf(stderr, " %s\n", ls->dentry_name);
1486 return;
1487 }
1488
1489 if (!(ls->dentry_flags & IS_DIR))
1490 one_remote_ref(ls->dentry_name);
1491 }
1492
1493 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1494 {
1495 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1496
1497 if (tag_closed) {
1498 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1499 if (ls->dentry_flags & IS_DIR) {
1500 if (ls->flags & PROCESS_DIRS) {
1501 ls->userFunc(ls);
1502 }
1503 if (strcmp(ls->dentry_name, ls->path) &&
1504 ls->flags & RECURSIVE) {
1505 remote_ls(ls->dentry_name,
1506 ls->flags,
1507 ls->userFunc,
1508 ls->userData);
1509 }
1510 } else if (ls->flags & PROCESS_FILES) {
1511 ls->userFunc(ls);
1512 }
1513 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1514 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1515 remote->path_len + 1);
1516 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1517 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1518 ls->dentry_flags |= IS_DIR;
1519 }
1520 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1521 free(ls->dentry_name);
1522 ls->dentry_name = NULL;
1523 ls->dentry_flags = 0;
1524 }
1525 }
1526
1527 static void remote_ls(const char *path, int flags,
1528 void (*userFunc)(struct remote_ls_ctx *ls),
1529 void *userData)
1530 {
1531 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1532 struct active_request_slot *slot;
1533 struct slot_results results;
1534 struct buffer in_buffer;
1535 struct buffer out_buffer;
1536 char *in_data;
1537 char *out_data;
1538 XML_Parser parser = XML_ParserCreate(NULL);
1539 enum XML_Status result;
1540 struct curl_slist *dav_headers = NULL;
1541 struct xml_ctx ctx;
1542 struct remote_ls_ctx ls;
1543
1544 ls.flags = flags;
1545 ls.path = xstrdup(path);
1546 ls.dentry_name = NULL;
1547 ls.dentry_flags = 0;
1548 ls.userData = userData;
1549 ls.userFunc = userFunc;
1550
1551 sprintf(url, "%s%s", remote->url, path);
1552
1553 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1554 out_data = xmalloc(out_buffer.size + 1);
1555 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1556 out_buffer.posn = 0;
1557 out_buffer.buffer = out_data;
1558
1559 in_buffer.size = 4096;
1560 in_data = xmalloc(in_buffer.size);
1561 in_buffer.posn = 0;
1562 in_buffer.buffer = in_data;
1563
1564 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1565 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1566
1567 slot = get_active_slot();
1568 slot->results = &results;
1569 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1570 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1571 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1572 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1573 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1574 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1575 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1576 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1577 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1578
1579 if (start_active_slot(slot)) {
1580 run_active_slot(slot);
1581 if (results.curl_result == CURLE_OK) {
1582 ctx.name = xcalloc(10, 1);
1583 ctx.len = 0;
1584 ctx.cdata = NULL;
1585 ctx.userFunc = handle_remote_ls_ctx;
1586 ctx.userData = &ls;
1587 XML_SetUserData(parser, &ctx);
1588 XML_SetElementHandler(parser, xml_start_tag,
1589 xml_end_tag);
1590 XML_SetCharacterDataHandler(parser, xml_cdata);
1591 result = XML_Parse(parser, in_buffer.buffer,
1592 in_buffer.posn, 1);
1593 free(ctx.name);
1594
1595 if (result != XML_STATUS_OK) {
1596 fprintf(stderr, "XML error: %s\n",
1597 XML_ErrorString(
1598 XML_GetErrorCode(parser)));
1599 }
1600 }
1601 } else {
1602 fprintf(stderr, "Unable to start PROPFIND request\n");
1603 }
1604
1605 free(ls.path);
1606 free(url);
1607 free(out_data);
1608 free(in_buffer.buffer);
1609 curl_slist_free_all(dav_headers);
1610 }
1611
1612 static void get_remote_object_list(unsigned char parent)
1613 {
1614 char path[] = "objects/XX/";
1615 static const char hex[] = "0123456789abcdef";
1616 unsigned int val = parent;
1617
1618 path[8] = hex[val >> 4];
1619 path[9] = hex[val & 0xf];
1620 remote_dir_exists[val] = 0;
1621 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1622 process_ls_object, &val);
1623 }
1624
1625 static int locking_available(void)
1626 {
1627 struct active_request_slot *slot;
1628 struct slot_results results;
1629 struct buffer in_buffer;
1630 struct buffer out_buffer;
1631 char *in_data;
1632 char *out_data;
1633 XML_Parser parser = XML_ParserCreate(NULL);
1634 enum XML_Status result;
1635 struct curl_slist *dav_headers = NULL;
1636 struct xml_ctx ctx;
1637 int lock_flags = 0;
1638
1639 out_buffer.size =
1640 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1641 strlen(remote->url) - 2;
1642 out_data = xmalloc(out_buffer.size + 1);
1643 snprintf(out_data, out_buffer.size + 1,
1644 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1645 out_buffer.posn = 0;
1646 out_buffer.buffer = out_data;
1647
1648 in_buffer.size = 4096;
1649 in_data = xmalloc(in_buffer.size);
1650 in_buffer.posn = 0;
1651 in_buffer.buffer = in_data;
1652
1653 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1654 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1655
1656 slot = get_active_slot();
1657 slot->results = &results;
1658 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1659 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1660 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1661 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1662 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1663 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1664 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1665 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1666 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1667
1668 if (start_active_slot(slot)) {
1669 run_active_slot(slot);
1670 if (results.curl_result == CURLE_OK) {
1671 ctx.name = xcalloc(10, 1);
1672 ctx.len = 0;
1673 ctx.cdata = NULL;
1674 ctx.userFunc = handle_lockprop_ctx;
1675 ctx.userData = &lock_flags;
1676 XML_SetUserData(parser, &ctx);
1677 XML_SetElementHandler(parser, xml_start_tag,
1678 xml_end_tag);
1679 result = XML_Parse(parser, in_buffer.buffer,
1680 in_buffer.posn, 1);
1681 free(ctx.name);
1682
1683 if (result != XML_STATUS_OK) {
1684 fprintf(stderr, "XML error: %s\n",
1685 XML_ErrorString(
1686 XML_GetErrorCode(parser)));
1687 lock_flags = 0;
1688 }
1689 }
1690 } else {
1691 fprintf(stderr, "Unable to start PROPFIND request\n");
1692 }
1693
1694 free(out_data);
1695 free(in_buffer.buffer);
1696 curl_slist_free_all(dav_headers);
1697
1698 return lock_flags;
1699 }
1700
1701 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1702 {
1703 struct object_list *entry = xmalloc(sizeof(struct object_list));
1704 entry->item = obj;
1705 entry->next = *p;
1706 *p = entry;
1707 return &entry->next;
1708 }
1709
1710 static struct object_list **process_blob(struct blob *blob,
1711 struct object_list **p,
1712 struct name_path *path,
1713 const char *name)
1714 {
1715 struct object *obj = &blob->object;
1716
1717 obj->flags |= LOCAL;
1718
1719 if (obj->flags & (UNINTERESTING | SEEN))
1720 return p;
1721
1722 obj->flags |= SEEN;
1723 return add_one_object(obj, p);
1724 }
1725
1726 static struct object_list **process_tree(struct tree *tree,
1727 struct object_list **p,
1728 struct name_path *path,
1729 const char *name)
1730 {
1731 struct object *obj = &tree->object;
1732 struct tree_desc desc;
1733 struct name_entry entry;
1734 struct name_path me;
1735
1736 obj->flags |= LOCAL;
1737
1738 if (obj->flags & (UNINTERESTING | SEEN))
1739 return p;
1740 if (parse_tree(tree) < 0)
1741 die("bad tree object %s", sha1_to_hex(obj->sha1));
1742
1743 obj->flags |= SEEN;
1744 name = xstrdup(name);
1745 p = add_one_object(obj, p);
1746 me.up = path;
1747 me.elem = name;
1748 me.elem_len = strlen(name);
1749
1750 desc.buf = tree->buffer;
1751 desc.size = tree->size;
1752
1753 while (tree_entry(&desc, &entry)) {
1754 if (S_ISDIR(entry.mode))
1755 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1756 else
1757 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1758 }
1759 free(tree->buffer);
1760 tree->buffer = NULL;
1761 return p;
1762 }
1763
1764 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1765 {
1766 int i;
1767 struct commit *commit;
1768 struct object_list **p = &objects;
1769 int count = 0;
1770
1771 while ((commit = get_revision(revs)) != NULL) {
1772 p = process_tree(commit->tree, p, NULL, "");
1773 commit->object.flags |= LOCAL;
1774 if (!(commit->object.flags & UNINTERESTING))
1775 count += add_send_request(&commit->object, lock);
1776 }
1777
1778 for (i = 0; i < revs->pending.nr; i++) {
1779 struct object_array_entry *entry = revs->pending.objects + i;
1780 struct object *obj = entry->item;
1781 const char *name = entry->name;
1782
1783 if (obj->flags & (UNINTERESTING | SEEN))
1784 continue;
1785 if (obj->type == OBJ_TAG) {
1786 obj->flags |= SEEN;
1787 p = add_one_object(obj, p);
1788 continue;
1789 }
1790 if (obj->type == OBJ_TREE) {
1791 p = process_tree((struct tree *)obj, p, NULL, name);
1792 continue;
1793 }
1794 if (obj->type == OBJ_BLOB) {
1795 p = process_blob((struct blob *)obj, p, NULL, name);
1796 continue;
1797 }
1798 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1799 }
1800
1801 while (objects) {
1802 if (!(objects->item->flags & UNINTERESTING))
1803 count += add_send_request(objects->item, lock);
1804 objects = objects->next;
1805 }
1806
1807 return count;
1808 }
1809
1810 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1811 {
1812 struct active_request_slot *slot;
1813 struct slot_results results;
1814 char *out_data;
1815 char *if_header;
1816 struct buffer out_buffer;
1817 struct curl_slist *dav_headers = NULL;
1818 int i;
1819
1820 if_header = xmalloc(strlen(lock->token) + 25);
1821 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1822 dav_headers = curl_slist_append(dav_headers, if_header);
1823
1824 out_buffer.size = 41;
1825 out_data = xmalloc(out_buffer.size + 1);
1826 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1827 if (i != out_buffer.size) {
1828 fprintf(stderr, "Unable to initialize PUT request body\n");
1829 return 0;
1830 }
1831 out_buffer.posn = 0;
1832 out_buffer.buffer = out_data;
1833
1834 slot = get_active_slot();
1835 slot->results = &results;
1836 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1837 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1838 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1839 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1840 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1841 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1842 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1843 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1844 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1845
1846 if (start_active_slot(slot)) {
1847 run_active_slot(slot);
1848 free(out_data);
1849 free(if_header);
1850 if (results.curl_result != CURLE_OK) {
1851 fprintf(stderr,
1852 "PUT error: curl result=%d, HTTP code=%ld\n",
1853 results.curl_result, results.http_code);
1854 /* We should attempt recovery? */
1855 return 0;
1856 }
1857 } else {
1858 free(out_data);
1859 free(if_header);
1860 fprintf(stderr, "Unable to start PUT request\n");
1861 return 0;
1862 }
1863
1864 return 1;
1865 }
1866
1867 static struct ref *local_refs, **local_tail;
1868 static struct ref *remote_refs, **remote_tail;
1869
1870 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1871 {
1872 struct ref *ref;
1873 int len = strlen(refname) + 1;
1874 ref = xcalloc(1, sizeof(*ref) + len);
1875 hashcpy(ref->new_sha1, sha1);
1876 memcpy(ref->name, refname, len);
1877 *local_tail = ref;
1878 local_tail = &ref->next;
1879 return 0;
1880 }
1881
1882 static void one_remote_ref(char *refname)
1883 {
1884 struct ref *ref;
1885 unsigned char remote_sha1[20];
1886 struct object *obj;
1887 int len = strlen(refname) + 1;
1888
1889 if (fetch_ref(refname, remote_sha1) != 0) {
1890 fprintf(stderr,
1891 "Unable to fetch ref %s from %s\n",
1892 refname, remote->url);
1893 return;
1894 }
1895
1896 /*
1897 * Fetch a copy of the object if it doesn't exist locally - it
1898 * may be required for updating server info later.
1899 */
1900 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1901 obj = lookup_unknown_object(remote_sha1);
1902 if (obj) {
1903 fprintf(stderr, " fetch %s for %s\n",
1904 sha1_to_hex(remote_sha1), refname);
1905 add_fetch_request(obj);
1906 }
1907 }
1908
1909 ref = xcalloc(1, sizeof(*ref) + len);
1910 hashcpy(ref->old_sha1, remote_sha1);
1911 memcpy(ref->name, refname, len);
1912 *remote_tail = ref;
1913 remote_tail = &ref->next;
1914 }
1915
1916 static void get_local_heads(void)
1917 {
1918 local_tail = &local_refs;
1919 for_each_ref(one_local_ref, NULL);
1920 }
1921
1922 static void get_dav_remote_heads(void)
1923 {
1924 remote_tail = &remote_refs;
1925 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1926 }
1927
1928 static int is_zero_sha1(const unsigned char *sha1)
1929 {
1930 int i;
1931
1932 for (i = 0; i < 20; i++) {
1933 if (*sha1++)
1934 return 0;
1935 }
1936 return 1;
1937 }
1938
1939 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1940 {
1941 while (list) {
1942 struct commit_list *temp = list;
1943 temp->item->object.flags &= ~mark;
1944 list = temp->next;
1945 free(temp);
1946 }
1947 }
1948
1949 static int ref_newer(const unsigned char *new_sha1,
1950 const unsigned char *old_sha1)
1951 {
1952 struct object *o;
1953 struct commit *old, *new;
1954 struct commit_list *list, *used;
1955 int found = 0;
1956
1957 /* Both new and old must be commit-ish and new is descendant of
1958 * old. Otherwise we require --force.
1959 */
1960 o = deref_tag(parse_object(old_sha1), NULL, 0);
1961 if (!o || o->type != OBJ_COMMIT)
1962 return 0;
1963 old = (struct commit *) o;
1964
1965 o = deref_tag(parse_object(new_sha1), NULL, 0);
1966 if (!o || o->type != OBJ_COMMIT)
1967 return 0;
1968 new = (struct commit *) o;
1969
1970 if (parse_commit(new) < 0)
1971 return 0;
1972
1973 used = list = NULL;
1974 commit_list_insert(new, &list);
1975 while (list) {
1976 new = pop_most_recent_commit(&list, TMP_MARK);
1977 commit_list_insert(new, &used);
1978 if (new == old) {
1979 found = 1;
1980 break;
1981 }
1982 }
1983 unmark_and_free(list, TMP_MARK);
1984 unmark_and_free(used, TMP_MARK);
1985 return found;
1986 }
1987
1988 static void mark_edge_parents_uninteresting(struct commit *commit)
1989 {
1990 struct commit_list *parents;
1991
1992 for (parents = commit->parents; parents; parents = parents->next) {
1993 struct commit *parent = parents->item;
1994 if (!(parent->object.flags & UNINTERESTING))
1995 continue;
1996 mark_tree_uninteresting(parent->tree);
1997 }
1998 }
1999
2000 static void mark_edges_uninteresting(struct commit_list *list)
2001 {
2002 for ( ; list; list = list->next) {
2003 struct commit *commit = list->item;
2004
2005 if (commit->object.flags & UNINTERESTING) {
2006 mark_tree_uninteresting(commit->tree);
2007 continue;
2008 }
2009 mark_edge_parents_uninteresting(commit);
2010 }
2011 }
2012
2013 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2014 {
2015 struct buffer *buf = (struct buffer *)ls->userData;
2016 unsigned char remote_sha1[20];
2017 struct object *o;
2018 int len;
2019 char *ref_info;
2020
2021 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2022 fprintf(stderr,
2023 "Unable to fetch ref %s from %s\n",
2024 ls->dentry_name, remote->url);
2025 aborted = 1;
2026 return;
2027 }
2028
2029 o = parse_object(remote_sha1);
2030 if (!o) {
2031 fprintf(stderr,
2032 "Unable to parse object %s for remote ref %s\n",
2033 sha1_to_hex(remote_sha1), ls->dentry_name);
2034 aborted = 1;
2035 return;
2036 }
2037
2038 len = strlen(ls->dentry_name) + 42;
2039 ref_info = xcalloc(len + 1, 1);
2040 sprintf(ref_info, "%s %s\n",
2041 sha1_to_hex(remote_sha1), ls->dentry_name);
2042 fwrite_buffer(ref_info, 1, len, buf);
2043 free(ref_info);
2044
2045 if (o->type == OBJ_TAG) {
2046 o = deref_tag(o, ls->dentry_name, 0);
2047 if (o) {
2048 len = strlen(ls->dentry_name) + 45;
2049 ref_info = xcalloc(len + 1, 1);
2050 sprintf(ref_info, "%s %s^{}\n",
2051 sha1_to_hex(o->sha1), ls->dentry_name);
2052 fwrite_buffer(ref_info, 1, len, buf);
2053 free(ref_info);
2054 }
2055 }
2056 }
2057
2058 static void update_remote_info_refs(struct remote_lock *lock)
2059 {
2060 struct buffer buffer;
2061 struct active_request_slot *slot;
2062 struct slot_results results;
2063 char *if_header;
2064 struct curl_slist *dav_headers = NULL;
2065
2066 buffer.buffer = xcalloc(1, 4096);
2067 buffer.size = 4096;
2068 buffer.posn = 0;
2069 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2070 add_remote_info_ref, &buffer);
2071 if (!aborted) {
2072 if_header = xmalloc(strlen(lock->token) + 25);
2073 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2074 dav_headers = curl_slist_append(dav_headers, if_header);
2075
2076 slot = get_active_slot();
2077 slot->results = &results;
2078 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2079 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2080 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2081 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2082 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2083 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2084 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2085 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2086 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2087
2088 buffer.posn = 0;
2089
2090 if (start_active_slot(slot)) {
2091 run_active_slot(slot);
2092 if (results.curl_result != CURLE_OK) {
2093 fprintf(stderr,
2094 "PUT error: curl result=%d, HTTP code=%ld\n",
2095 results.curl_result, results.http_code);
2096 }
2097 }
2098 free(if_header);
2099 }
2100 free(buffer.buffer);
2101 }
2102
2103 static int remote_exists(const char *path)
2104 {
2105 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2106 struct active_request_slot *slot;
2107 struct slot_results results;
2108
2109 sprintf(url, "%s%s", remote->url, path);
2110
2111 slot = get_active_slot();
2112 slot->results = &results;
2113 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2114 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2115
2116 if (start_active_slot(slot)) {
2117 run_active_slot(slot);
2118 if (results.http_code == 404)
2119 return 0;
2120 else if (results.curl_result == CURLE_OK)
2121 return 1;
2122 else
2123 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2124 } else {
2125 fprintf(stderr, "Unable to start HEAD request\n");
2126 }
2127
2128 return -1;
2129 }
2130
2131 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2132 {
2133 char *url;
2134 struct buffer buffer;
2135 struct active_request_slot *slot;
2136 struct slot_results results;
2137
2138 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2139 sprintf(url, "%s%s", remote->url, path);
2140
2141 buffer.size = 4096;
2142 buffer.posn = 0;
2143 buffer.buffer = xmalloc(buffer.size);
2144
2145 slot = get_active_slot();
2146 slot->results = &results;
2147 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2148 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2149 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2150 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2151 if (start_active_slot(slot)) {
2152 run_active_slot(slot);
2153 if (results.curl_result != CURLE_OK) {
2154 die("Couldn't get %s for remote symref\n%s",
2155 url, curl_errorstr);
2156 }
2157 } else {
2158 die("Unable to start remote symref request");
2159 }
2160 free(url);
2161
2162 if (*symref != NULL)
2163 free(*symref);
2164 *symref = NULL;
2165 hashclr(sha1);
2166
2167 if (buffer.posn == 0)
2168 return;
2169
2170 /* If it's a symref, set the refname; otherwise try for a sha1 */
2171 if (!strncmp((char *)buffer.buffer, "ref: ", 5)) {
2172 *symref = xmalloc(buffer.posn - 5);
2173 strlcpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 5);
2174 } else {
2175 get_sha1_hex(buffer.buffer, sha1);
2176 }
2177
2178 free(buffer.buffer);
2179 }
2180
2181 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2182 {
2183 struct commit *head = lookup_commit(head_sha1);
2184 struct commit *branch = lookup_commit(branch_sha1);
2185 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2186
2187 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2188 }
2189
2190 static int delete_remote_branch(char *pattern, int force)
2191 {
2192 struct ref *refs = remote_refs;
2193 struct ref *remote_ref = NULL;
2194 unsigned char head_sha1[20];
2195 char *symref = NULL;
2196 int match;
2197 int patlen = strlen(pattern);
2198 int i;
2199 struct active_request_slot *slot;
2200 struct slot_results results;
2201 char *url;
2202
2203 /* Find the remote branch(es) matching the specified branch name */
2204 for (match = 0; refs; refs = refs->next) {
2205 char *name = refs->name;
2206 int namelen = strlen(name);
2207 if (namelen < patlen ||
2208 memcmp(name + namelen - patlen, pattern, patlen))
2209 continue;
2210 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2211 continue;
2212 match++;
2213 remote_ref = refs;
2214 }
2215 if (match == 0)
2216 return error("No remote branch matches %s", pattern);
2217 if (match != 1)
2218 return error("More than one remote branch matches %s",
2219 pattern);
2220
2221 /*
2222 * Remote HEAD must be a symref (not exactly foolproof; a remote
2223 * symlink to a symref will look like a symref)
2224 */
2225 fetch_symref("HEAD", &symref, head_sha1);
2226 if (!symref)
2227 return error("Remote HEAD is not a symref");
2228
2229 /* Remote branch must not be the remote HEAD */
2230 for (i=0; symref && i<MAXDEPTH; i++) {
2231 if (!strcmp(remote_ref->name, symref))
2232 return error("Remote branch %s is the current HEAD",
2233 remote_ref->name);
2234 fetch_symref(symref, &symref, head_sha1);
2235 }
2236
2237 /* Run extra sanity checks if delete is not forced */
2238 if (!force) {
2239 /* Remote HEAD must resolve to a known object */
2240 if (symref)
2241 return error("Remote HEAD symrefs too deep");
2242 if (is_zero_sha1(head_sha1))
2243 return error("Unable to resolve remote HEAD");
2244 if (!has_sha1_file(head_sha1))
2245 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2246
2247 /* Remote branch must resolve to a known object */
2248 if (is_zero_sha1(remote_ref->old_sha1))
2249 return error("Unable to resolve remote branch %s",
2250 remote_ref->name);
2251 if (!has_sha1_file(remote_ref->old_sha1))
2252 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));
2253
2254 /* Remote branch must be an ancestor of remote HEAD */
2255 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2256 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);
2257 }
2258 }
2259
2260 /* Send delete request */
2261 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2262 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2263 sprintf(url, "%s%s", remote->url, remote_ref->name);
2264 slot = get_active_slot();
2265 slot->results = &results;
2266 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2267 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2268 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2269 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2270 if (start_active_slot(slot)) {
2271 run_active_slot(slot);
2272 free(url);
2273 if (results.curl_result != CURLE_OK)
2274 return error("DELETE request failed (%d/%ld)\n",
2275 results.curl_result, results.http_code);
2276 } else {
2277 free(url);
2278 return error("Unable to start DELETE request");
2279 }
2280
2281 return 0;
2282 }
2283
2284 int main(int argc, char **argv)
2285 {
2286 struct transfer_request *request;
2287 struct transfer_request *next_request;
2288 int nr_refspec = 0;
2289 char **refspec = NULL;
2290 struct remote_lock *ref_lock = NULL;
2291 struct remote_lock *info_ref_lock = NULL;
2292 struct rev_info revs;
2293 int delete_branch = 0;
2294 int force_delete = 0;
2295 int objects_to_send;
2296 int rc = 0;
2297 int i;
2298 int new_refs;
2299 struct ref *ref;
2300
2301 setup_git_directory();
2302 setup_ident();
2303
2304 remote = xcalloc(sizeof(*remote), 1);
2305
2306 argv++;
2307 for (i = 1; i < argc; i++, argv++) {
2308 char *arg = *argv;
2309
2310 if (*arg == '-') {
2311 if (!strcmp(arg, "--all")) {
2312 push_all = 1;
2313 continue;
2314 }
2315 if (!strcmp(arg, "--force")) {
2316 force_all = 1;
2317 continue;
2318 }
2319 if (!strcmp(arg, "--verbose")) {
2320 push_verbosely = 1;
2321 continue;
2322 }
2323 if (!strcmp(arg, "-d")) {
2324 delete_branch = 1;
2325 continue;
2326 }
2327 if (!strcmp(arg, "-D")) {
2328 delete_branch = 1;
2329 force_delete = 1;
2330 continue;
2331 }
2332 }
2333 if (!remote->url) {
2334 char *path = strstr(arg, "//");
2335 remote->url = arg;
2336 if (path) {
2337 path = strchr(path+2, '/');
2338 if (path)
2339 remote->path_len = strlen(path);
2340 }
2341 continue;
2342 }
2343 refspec = argv;
2344 nr_refspec = argc - i;
2345 break;
2346 }
2347
2348 if (!remote->url)
2349 usage(http_push_usage);
2350
2351 if (delete_branch && nr_refspec != 1)
2352 die("You must specify only one branch name when deleting a remote branch");
2353
2354 memset(remote_dir_exists, -1, 256);
2355
2356 http_init();
2357
2358 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2359 default_headers = curl_slist_append(default_headers, "Range:");
2360 default_headers = curl_slist_append(default_headers, "Destination:");
2361 default_headers = curl_slist_append(default_headers, "If:");
2362 default_headers = curl_slist_append(default_headers,
2363 "Pragma: no-cache");
2364
2365 /* Verify DAV compliance/lock support */
2366 if (!locking_available()) {
2367 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2368 rc = 1;
2369 goto cleanup;
2370 }
2371
2372 /* Check whether the remote has server info files */
2373 remote->can_update_info_refs = 0;
2374 remote->has_info_refs = remote_exists("info/refs");
2375 remote->has_info_packs = remote_exists("objects/info/packs");
2376 if (remote->has_info_refs) {
2377 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2378 if (info_ref_lock)
2379 remote->can_update_info_refs = 1;
2380 }
2381 if (remote->has_info_packs)
2382 fetch_indices();
2383
2384 /* Get a list of all local and remote heads to validate refspecs */
2385 get_local_heads();
2386 fprintf(stderr, "Fetching remote heads...\n");
2387 get_dav_remote_heads();
2388
2389 /* Remove a remote branch if -d or -D was specified */
2390 if (delete_branch) {
2391 if (delete_remote_branch(refspec[0], force_delete) == -1)
2392 fprintf(stderr, "Unable to delete remote branch %s\n",
2393 refspec[0]);
2394 goto cleanup;
2395 }
2396
2397 /* match them up */
2398 if (!remote_tail)
2399 remote_tail = &remote_refs;
2400 if (match_refs(local_refs, remote_refs, &remote_tail,
2401 nr_refspec, refspec, push_all))
2402 return -1;
2403 if (!remote_refs) {
2404 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2405 return 0;
2406 }
2407
2408 new_refs = 0;
2409 for (ref = remote_refs; ref; ref = ref->next) {
2410 char old_hex[60], *new_hex;
2411 const char *commit_argv[4];
2412 int commit_argc;
2413 char *new_sha1_hex, *old_sha1_hex;
2414
2415 if (!ref->peer_ref)
2416 continue;
2417 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2418 if (push_verbosely || 1)
2419 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2420 continue;
2421 }
2422
2423 if (!force_all &&
2424 !is_zero_sha1(ref->old_sha1) &&
2425 !ref->force) {
2426 if (!has_sha1_file(ref->old_sha1) ||
2427 !ref_newer(ref->peer_ref->new_sha1,
2428 ref->old_sha1)) {
2429 /* We do not have the remote ref, or
2430 * we know that the remote ref is not
2431 * an ancestor of what we are trying to
2432 * push. Either way this can be losing
2433 * commits at the remote end and likely
2434 * we were not up to date to begin with.
2435 */
2436 error("remote '%s' is not a strict "
2437 "subset of local ref '%s'. "
2438 "maybe you are not up-to-date and "
2439 "need to pull first?",
2440 ref->name,
2441 ref->peer_ref->name);
2442 rc = -2;
2443 continue;
2444 }
2445 }
2446 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2447 if (is_zero_sha1(ref->new_sha1)) {
2448 error("cannot happen anymore");
2449 rc = -3;
2450 continue;
2451 }
2452 new_refs++;
2453 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2454 new_hex = sha1_to_hex(ref->new_sha1);
2455
2456 fprintf(stderr, "updating '%s'", ref->name);
2457 if (strcmp(ref->name, ref->peer_ref->name))
2458 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2459 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2460
2461
2462 /* Lock remote branch ref */
2463 ref_lock = lock_remote(ref->name, LOCK_TIME);
2464 if (ref_lock == NULL) {
2465 fprintf(stderr, "Unable to lock remote branch %s\n",
2466 ref->name);
2467 rc = 1;
2468 continue;
2469 }
2470
2471 /* Set up revision info for this refspec */
2472 commit_argc = 3;
2473 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2474 old_sha1_hex = NULL;
2475 commit_argv[1] = "--objects";
2476 commit_argv[2] = new_sha1_hex;
2477 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2478 old_sha1_hex = xmalloc(42);
2479 sprintf(old_sha1_hex, "^%s",
2480 sha1_to_hex(ref->old_sha1));
2481 commit_argv[3] = old_sha1_hex;
2482 commit_argc++;
2483 }
2484 init_revisions(&revs, setup_git_directory());
2485 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2486 free(new_sha1_hex);
2487 if (old_sha1_hex) {
2488 free(old_sha1_hex);
2489 commit_argv[1] = NULL;
2490 }
2491
2492 /* Generate a list of objects that need to be pushed */
2493 pushing = 0;
2494 prepare_revision_walk(&revs);
2495 mark_edges_uninteresting(revs.commits);
2496 objects_to_send = get_delta(&revs, ref_lock);
2497 finish_all_active_slots();
2498
2499 /* Push missing objects to remote, this would be a
2500 convenient time to pack them first if appropriate. */
2501 pushing = 1;
2502 if (objects_to_send)
2503 fprintf(stderr, " sending %d objects\n",
2504 objects_to_send);
2505 #ifdef USE_CURL_MULTI
2506 fill_active_slots();
2507 #endif
2508 finish_all_active_slots();
2509
2510 /* Update the remote branch if all went well */
2511 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2512 rc = 1;
2513 goto unlock;
2514 }
2515
2516 unlock:
2517 if (!rc)
2518 fprintf(stderr, " done\n");
2519 unlock_remote(ref_lock);
2520 check_locks();
2521 }
2522
2523 /* Update remote server info if appropriate */
2524 if (remote->has_info_refs && new_refs) {
2525 if (info_ref_lock && remote->can_update_info_refs) {
2526 fprintf(stderr, "Updating remote server info\n");
2527 update_remote_info_refs(info_ref_lock);
2528 } else {
2529 fprintf(stderr, "Unable to update server info\n");
2530 }
2531 }
2532 if (info_ref_lock)
2533 unlock_remote(info_ref_lock);
2534
2535 cleanup:
2536 free(remote);
2537
2538 curl_slist_free_all(no_pragma_header);
2539 curl_slist_free_all(default_headers);
2540
2541 http_cleanup();
2542
2543 request = request_queue_head;
2544 while (request != NULL) {
2545 next_request = request->next;
2546 release_request(request);
2547 request = next_request;
2548 }
2549
2550 return rc;
2551 }
peff's git enhancements