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Fix various memory leaks in http-push.c and http-walker.c
[thirdparty/git.git] / http-push.c
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 int ret;
1123
1124 url = quote_ref_url(base, ref);
1125 slot = get_active_slot();
1126 slot->results = &results;
1127 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1128 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1129 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1130 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1131 if (start_active_slot(slot)) {
1132 run_active_slot(slot);
1133 if (results.curl_result == CURLE_OK) {
1134 strbuf_rtrim(&buffer);
1135 if (buffer.len == 40)
1136 ret = get_sha1_hex(buffer.buf, sha1);
1137 else
1138 ret = 1;
1139 } else {
1140 ret = error("Couldn't get %s for %s\n%s",
1141 url, ref, curl_errorstr);
1142 }
1143 } else {
1144 ret = error("Unable to start request");
1145 }
1146
1147 strbuf_release(&buffer);
1148 free(url);
1149 return ret;
1150 }
1151
1152 static void one_remote_object(const char *hex)
1153 {
1154 unsigned char sha1[20];
1155 struct object *obj;
1156
1157 if (get_sha1_hex(hex, sha1) != 0)
1158 return;
1159
1160 obj = lookup_object(sha1);
1161 if (!obj)
1162 obj = parse_object(sha1);
1163
1164 /* Ignore remote objects that don't exist locally */
1165 if (!obj)
1166 return;
1167
1168 obj->flags |= REMOTE;
1169 if (!object_list_contains(objects, obj))
1170 object_list_insert(obj, &objects);
1171 }
1172
1173 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1174 {
1175 int *lock_flags = (int *)ctx->userData;
1176
1177 if (tag_closed) {
1178 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1179 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1180 (*lock_flags & DAV_PROP_LOCKWR)) {
1181 *lock_flags |= DAV_LOCK_OK;
1182 }
1183 *lock_flags &= DAV_LOCK_OK;
1184 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1185 *lock_flags |= DAV_PROP_LOCKWR;
1186 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1187 *lock_flags |= DAV_PROP_LOCKEX;
1188 }
1189 }
1190 }
1191
1192 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1193 {
1194 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1195
1196 if (tag_closed && ctx->cdata) {
1197 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1198 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1199 strcpy(lock->owner, ctx->cdata);
1200 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1201 if (!prefixcmp(ctx->cdata, "Second-"))
1202 lock->timeout =
1203 strtol(ctx->cdata + 7, NULL, 10);
1204 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1205 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1206 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1207 strcpy(lock->token, ctx->cdata + 16);
1208 }
1209 }
1210 }
1211 }
1212
1213 static void one_remote_ref(char *refname);
1214
1215 static void
1216 xml_start_tag(void *userData, const char *name, const char **atts)
1217 {
1218 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1219 const char *c = strchr(name, ':');
1220 int new_len;
1221
1222 if (c == NULL)
1223 c = name;
1224 else
1225 c++;
1226
1227 new_len = strlen(ctx->name) + strlen(c) + 2;
1228
1229 if (new_len > ctx->len) {
1230 ctx->name = xrealloc(ctx->name, new_len);
1231 ctx->len = new_len;
1232 }
1233 strcat(ctx->name, ".");
1234 strcat(ctx->name, c);
1235
1236 free(ctx->cdata);
1237 ctx->cdata = NULL;
1238
1239 ctx->userFunc(ctx, 0);
1240 }
1241
1242 static void
1243 xml_end_tag(void *userData, const char *name)
1244 {
1245 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1246 const char *c = strchr(name, ':');
1247 char *ep;
1248
1249 ctx->userFunc(ctx, 1);
1250
1251 if (c == NULL)
1252 c = name;
1253 else
1254 c++;
1255
1256 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1257 *ep = 0;
1258 }
1259
1260 static void
1261 xml_cdata(void *userData, const XML_Char *s, int len)
1262 {
1263 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1264 free(ctx->cdata);
1265 ctx->cdata = xmemdupz(s, len);
1266 }
1267
1268 static struct remote_lock *lock_remote(const char *path, long timeout)
1269 {
1270 struct active_request_slot *slot;
1271 struct slot_results results;
1272 struct buffer out_buffer = { STRBUF_INIT, 0 };
1273 struct strbuf in_buffer = STRBUF_INIT;
1274 char *url;
1275 char *ep;
1276 char timeout_header[25];
1277 struct remote_lock *lock = NULL;
1278 struct curl_slist *dav_headers = NULL;
1279 struct xml_ctx ctx;
1280
1281 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1282 sprintf(url, "%s%s", remote->url, path);
1283
1284 /* Make sure leading directories exist for the remote ref */
1285 ep = strchr(url + strlen(remote->url) + 1, '/');
1286 while (ep) {
1287 *ep = 0;
1288 slot = get_active_slot();
1289 slot->results = &results;
1290 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1291 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1292 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1293 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1294 if (start_active_slot(slot)) {
1295 run_active_slot(slot);
1296 if (results.curl_result != CURLE_OK &&
1297 results.http_code != 405) {
1298 fprintf(stderr,
1299 "Unable to create branch path %s\n",
1300 url);
1301 free(url);
1302 return NULL;
1303 }
1304 } else {
1305 fprintf(stderr, "Unable to start MKCOL request\n");
1306 free(url);
1307 return NULL;
1308 }
1309 *ep = '/';
1310 ep = strchr(ep + 1, '/');
1311 }
1312
1313 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1314
1315 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1316 dav_headers = curl_slist_append(dav_headers, timeout_header);
1317 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1318
1319 slot = get_active_slot();
1320 slot->results = &results;
1321 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1322 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1323 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1324 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1325 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1326 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1327 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1328 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1329 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1330
1331 lock = xcalloc(1, sizeof(*lock));
1332 lock->timeout = -1;
1333
1334 if (start_active_slot(slot)) {
1335 run_active_slot(slot);
1336 if (results.curl_result == CURLE_OK) {
1337 XML_Parser parser = XML_ParserCreate(NULL);
1338 enum XML_Status result;
1339 ctx.name = xcalloc(10, 1);
1340 ctx.len = 0;
1341 ctx.cdata = NULL;
1342 ctx.userFunc = handle_new_lock_ctx;
1343 ctx.userData = lock;
1344 XML_SetUserData(parser, &ctx);
1345 XML_SetElementHandler(parser, xml_start_tag,
1346 xml_end_tag);
1347 XML_SetCharacterDataHandler(parser, xml_cdata);
1348 result = XML_Parse(parser, in_buffer.buf,
1349 in_buffer.len, 1);
1350 free(ctx.name);
1351 if (result != XML_STATUS_OK) {
1352 fprintf(stderr, "XML error: %s\n",
1353 XML_ErrorString(
1354 XML_GetErrorCode(parser)));
1355 lock->timeout = -1;
1356 }
1357 XML_ParserFree(parser);
1358 }
1359 } else {
1360 fprintf(stderr, "Unable to start LOCK request\n");
1361 }
1362
1363 curl_slist_free_all(dav_headers);
1364 strbuf_release(&out_buffer.buf);
1365 strbuf_release(&in_buffer);
1366
1367 if (lock->token == NULL || lock->timeout <= 0) {
1368 if (lock->token != NULL)
1369 free(lock->token);
1370 if (lock->owner != NULL)
1371 free(lock->owner);
1372 free(url);
1373 free(lock);
1374 lock = NULL;
1375 } else {
1376 lock->url = url;
1377 lock->start_time = time(NULL);
1378 lock->next = remote->locks;
1379 remote->locks = lock;
1380 }
1381
1382 return lock;
1383 }
1384
1385 static int unlock_remote(struct remote_lock *lock)
1386 {
1387 struct active_request_slot *slot;
1388 struct slot_results results;
1389 struct remote_lock *prev = remote->locks;
1390 char *lock_token_header;
1391 struct curl_slist *dav_headers = NULL;
1392 int rc = 0;
1393
1394 lock_token_header = xmalloc(strlen(lock->token) + 31);
1395 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1396 lock->token);
1397 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1398
1399 slot = get_active_slot();
1400 slot->results = &results;
1401 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1402 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1403 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1404 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1405
1406 if (start_active_slot(slot)) {
1407 run_active_slot(slot);
1408 if (results.curl_result == CURLE_OK)
1409 rc = 1;
1410 else
1411 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1412 results.http_code);
1413 } else {
1414 fprintf(stderr, "Unable to start UNLOCK request\n");
1415 }
1416
1417 curl_slist_free_all(dav_headers);
1418 free(lock_token_header);
1419
1420 if (remote->locks == lock) {
1421 remote->locks = lock->next;
1422 } else {
1423 while (prev && prev->next != lock)
1424 prev = prev->next;
1425 if (prev)
1426 prev->next = prev->next->next;
1427 }
1428
1429 if (lock->owner != NULL)
1430 free(lock->owner);
1431 free(lock->url);
1432 free(lock->token);
1433 free(lock);
1434
1435 return rc;
1436 }
1437
1438 static void remote_ls(const char *path, int flags,
1439 void (*userFunc)(struct remote_ls_ctx *ls),
1440 void *userData);
1441
1442 static void process_ls_object(struct remote_ls_ctx *ls)
1443 {
1444 unsigned int *parent = (unsigned int *)ls->userData;
1445 char *path = ls->dentry_name;
1446 char *obj_hex;
1447
1448 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1449 remote_dir_exists[*parent] = 1;
1450 return;
1451 }
1452
1453 if (strlen(path) != 49)
1454 return;
1455 path += 8;
1456 obj_hex = xmalloc(strlen(path));
1457 /* NB: path is not null-terminated, can not use strlcpy here */
1458 memcpy(obj_hex, path, 2);
1459 strcpy(obj_hex + 2, path + 3);
1460 one_remote_object(obj_hex);
1461 free(obj_hex);
1462 }
1463
1464 static void process_ls_ref(struct remote_ls_ctx *ls)
1465 {
1466 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1467 fprintf(stderr, " %s\n", ls->dentry_name);
1468 return;
1469 }
1470
1471 if (!(ls->dentry_flags & IS_DIR))
1472 one_remote_ref(ls->dentry_name);
1473 }
1474
1475 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1476 {
1477 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1478
1479 if (tag_closed) {
1480 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1481 if (ls->dentry_flags & IS_DIR) {
1482 if (ls->flags & PROCESS_DIRS) {
1483 ls->userFunc(ls);
1484 }
1485 if (strcmp(ls->dentry_name, ls->path) &&
1486 ls->flags & RECURSIVE) {
1487 remote_ls(ls->dentry_name,
1488 ls->flags,
1489 ls->userFunc,
1490 ls->userData);
1491 }
1492 } else if (ls->flags & PROCESS_FILES) {
1493 ls->userFunc(ls);
1494 }
1495 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1496 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1497 remote->path_len + 1);
1498 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1499 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1500 ls->dentry_flags |= IS_DIR;
1501 }
1502 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1503 free(ls->dentry_name);
1504 ls->dentry_name = NULL;
1505 ls->dentry_flags = 0;
1506 }
1507 }
1508
1509 static void remote_ls(const char *path, int flags,
1510 void (*userFunc)(struct remote_ls_ctx *ls),
1511 void *userData)
1512 {
1513 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1514 struct active_request_slot *slot;
1515 struct slot_results results;
1516 struct strbuf in_buffer = STRBUF_INIT;
1517 struct buffer out_buffer = { STRBUF_INIT, 0 };
1518 struct curl_slist *dav_headers = NULL;
1519 struct xml_ctx ctx;
1520 struct remote_ls_ctx ls;
1521
1522 ls.flags = flags;
1523 ls.path = xstrdup(path);
1524 ls.dentry_name = NULL;
1525 ls.dentry_flags = 0;
1526 ls.userData = userData;
1527 ls.userFunc = userFunc;
1528
1529 sprintf(url, "%s%s", remote->url, path);
1530
1531 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1532
1533 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1534 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1535
1536 slot = get_active_slot();
1537 slot->results = &results;
1538 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1539 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1540 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1541 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1542 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1543 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1544 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1545 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1546 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1547
1548 if (start_active_slot(slot)) {
1549 run_active_slot(slot);
1550 if (results.curl_result == CURLE_OK) {
1551 XML_Parser parser = XML_ParserCreate(NULL);
1552 enum XML_Status result;
1553 ctx.name = xcalloc(10, 1);
1554 ctx.len = 0;
1555 ctx.cdata = NULL;
1556 ctx.userFunc = handle_remote_ls_ctx;
1557 ctx.userData = &ls;
1558 XML_SetUserData(parser, &ctx);
1559 XML_SetElementHandler(parser, xml_start_tag,
1560 xml_end_tag);
1561 XML_SetCharacterDataHandler(parser, xml_cdata);
1562 result = XML_Parse(parser, in_buffer.buf,
1563 in_buffer.len, 1);
1564 free(ctx.name);
1565
1566 if (result != XML_STATUS_OK) {
1567 fprintf(stderr, "XML error: %s\n",
1568 XML_ErrorString(
1569 XML_GetErrorCode(parser)));
1570 }
1571 XML_ParserFree(parser);
1572 }
1573 } else {
1574 fprintf(stderr, "Unable to start PROPFIND request\n");
1575 }
1576
1577 free(ls.path);
1578 free(url);
1579 strbuf_release(&out_buffer.buf);
1580 strbuf_release(&in_buffer);
1581 curl_slist_free_all(dav_headers);
1582 }
1583
1584 static void get_remote_object_list(unsigned char parent)
1585 {
1586 char path[] = "objects/XX/";
1587 static const char hex[] = "0123456789abcdef";
1588 unsigned int val = parent;
1589
1590 path[8] = hex[val >> 4];
1591 path[9] = hex[val & 0xf];
1592 remote_dir_exists[val] = 0;
1593 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1594 process_ls_object, &val);
1595 }
1596
1597 static int locking_available(void)
1598 {
1599 struct active_request_slot *slot;
1600 struct slot_results results;
1601 struct strbuf in_buffer = STRBUF_INIT;
1602 struct buffer out_buffer = { STRBUF_INIT, 0 };
1603 struct curl_slist *dav_headers = NULL;
1604 struct xml_ctx ctx;
1605 int lock_flags = 0;
1606
1607 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1608
1609 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1610 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1611
1612 slot = get_active_slot();
1613 slot->results = &results;
1614 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1615 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1616 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1617 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1618 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1619 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1620 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1621 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1622 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1623
1624 if (start_active_slot(slot)) {
1625 run_active_slot(slot);
1626 if (results.curl_result == CURLE_OK) {
1627 XML_Parser parser = XML_ParserCreate(NULL);
1628 enum XML_Status result;
1629 ctx.name = xcalloc(10, 1);
1630 ctx.len = 0;
1631 ctx.cdata = NULL;
1632 ctx.userFunc = handle_lockprop_ctx;
1633 ctx.userData = &lock_flags;
1634 XML_SetUserData(parser, &ctx);
1635 XML_SetElementHandler(parser, xml_start_tag,
1636 xml_end_tag);
1637 result = XML_Parse(parser, in_buffer.buf,
1638 in_buffer.len, 1);
1639 free(ctx.name);
1640
1641 if (result != XML_STATUS_OK) {
1642 fprintf(stderr, "XML error: %s\n",
1643 XML_ErrorString(
1644 XML_GetErrorCode(parser)));
1645 lock_flags = 0;
1646 }
1647 XML_ParserFree(parser);
1648 }
1649 } else {
1650 fprintf(stderr, "Unable to start PROPFIND request\n");
1651 }
1652
1653 strbuf_release(&out_buffer.buf);
1654 strbuf_release(&in_buffer);
1655 curl_slist_free_all(dav_headers);
1656
1657 return lock_flags;
1658 }
1659
1660 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1661 {
1662 struct object_list *entry = xmalloc(sizeof(struct object_list));
1663 entry->item = obj;
1664 entry->next = *p;
1665 *p = entry;
1666 return &entry->next;
1667 }
1668
1669 static struct object_list **process_blob(struct blob *blob,
1670 struct object_list **p,
1671 struct name_path *path,
1672 const char *name)
1673 {
1674 struct object *obj = &blob->object;
1675
1676 obj->flags |= LOCAL;
1677
1678 if (obj->flags & (UNINTERESTING | SEEN))
1679 return p;
1680
1681 obj->flags |= SEEN;
1682 return add_one_object(obj, p);
1683 }
1684
1685 static struct object_list **process_tree(struct tree *tree,
1686 struct object_list **p,
1687 struct name_path *path,
1688 const char *name)
1689 {
1690 struct object *obj = &tree->object;
1691 struct tree_desc desc;
1692 struct name_entry entry;
1693 struct name_path me;
1694
1695 obj->flags |= LOCAL;
1696
1697 if (obj->flags & (UNINTERESTING | SEEN))
1698 return p;
1699 if (parse_tree(tree) < 0)
1700 die("bad tree object %s", sha1_to_hex(obj->sha1));
1701
1702 obj->flags |= SEEN;
1703 name = xstrdup(name);
1704 p = add_one_object(obj, p);
1705 me.up = path;
1706 me.elem = name;
1707 me.elem_len = strlen(name);
1708
1709 init_tree_desc(&desc, tree->buffer, tree->size);
1710
1711 while (tree_entry(&desc, &entry)) {
1712 if (S_ISDIR(entry.mode))
1713 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1714 else
1715 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1716 }
1717 free(tree->buffer);
1718 tree->buffer = NULL;
1719 return p;
1720 }
1721
1722 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1723 {
1724 int i;
1725 struct commit *commit;
1726 struct object_list **p = &objects;
1727 int count = 0;
1728
1729 while ((commit = get_revision(revs)) != NULL) {
1730 p = process_tree(commit->tree, p, NULL, "");
1731 commit->object.flags |= LOCAL;
1732 if (!(commit->object.flags & UNINTERESTING))
1733 count += add_send_request(&commit->object, lock);
1734 }
1735
1736 for (i = 0; i < revs->pending.nr; i++) {
1737 struct object_array_entry *entry = revs->pending.objects + i;
1738 struct object *obj = entry->item;
1739 const char *name = entry->name;
1740
1741 if (obj->flags & (UNINTERESTING | SEEN))
1742 continue;
1743 if (obj->type == OBJ_TAG) {
1744 obj->flags |= SEEN;
1745 p = add_one_object(obj, p);
1746 continue;
1747 }
1748 if (obj->type == OBJ_TREE) {
1749 p = process_tree((struct tree *)obj, p, NULL, name);
1750 continue;
1751 }
1752 if (obj->type == OBJ_BLOB) {
1753 p = process_blob((struct blob *)obj, p, NULL, name);
1754 continue;
1755 }
1756 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1757 }
1758
1759 while (objects) {
1760 if (!(objects->item->flags & UNINTERESTING))
1761 count += add_send_request(objects->item, lock);
1762 objects = objects->next;
1763 }
1764
1765 return count;
1766 }
1767
1768 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1769 {
1770 struct active_request_slot *slot;
1771 struct slot_results results;
1772 char *if_header;
1773 struct buffer out_buffer = { STRBUF_INIT, 0 };
1774 struct curl_slist *dav_headers = NULL;
1775
1776 if_header = xmalloc(strlen(lock->token) + 25);
1777 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1778 dav_headers = curl_slist_append(dav_headers, if_header);
1779
1780 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1781
1782 slot = get_active_slot();
1783 slot->results = &results;
1784 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1785 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1786 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1787 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1788 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1789 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1790 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1791 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1792 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1793
1794 if (start_active_slot(slot)) {
1795 run_active_slot(slot);
1796 strbuf_release(&out_buffer.buf);
1797 free(if_header);
1798 if (results.curl_result != CURLE_OK) {
1799 fprintf(stderr,
1800 "PUT error: curl result=%d, HTTP code=%ld\n",
1801 results.curl_result, results.http_code);
1802 /* We should attempt recovery? */
1803 return 0;
1804 }
1805 } else {
1806 strbuf_release(&out_buffer.buf);
1807 free(if_header);
1808 fprintf(stderr, "Unable to start PUT request\n");
1809 return 0;
1810 }
1811
1812 return 1;
1813 }
1814
1815 static struct ref *local_refs, **local_tail;
1816 static struct ref *remote_refs, **remote_tail;
1817
1818 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1819 {
1820 struct ref *ref;
1821 int len = strlen(refname) + 1;
1822 ref = xcalloc(1, sizeof(*ref) + len);
1823 hashcpy(ref->new_sha1, sha1);
1824 memcpy(ref->name, refname, len);
1825 *local_tail = ref;
1826 local_tail = &ref->next;
1827 return 0;
1828 }
1829
1830 static void one_remote_ref(char *refname)
1831 {
1832 struct ref *ref;
1833 unsigned char remote_sha1[20];
1834 struct object *obj;
1835 int len = strlen(refname) + 1;
1836
1837 if (fetch_ref(refname, remote_sha1) != 0) {
1838 fprintf(stderr,
1839 "Unable to fetch ref %s from %s\n",
1840 refname, remote->url);
1841 return;
1842 }
1843
1844 /*
1845 * Fetch a copy of the object if it doesn't exist locally - it
1846 * may be required for updating server info later.
1847 */
1848 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1849 obj = lookup_unknown_object(remote_sha1);
1850 if (obj) {
1851 fprintf(stderr, " fetch %s for %s\n",
1852 sha1_to_hex(remote_sha1), refname);
1853 add_fetch_request(obj);
1854 }
1855 }
1856
1857 ref = xcalloc(1, sizeof(*ref) + len);
1858 hashcpy(ref->old_sha1, remote_sha1);
1859 memcpy(ref->name, refname, len);
1860 *remote_tail = ref;
1861 remote_tail = &ref->next;
1862 }
1863
1864 static void get_local_heads(void)
1865 {
1866 local_tail = &local_refs;
1867 for_each_ref(one_local_ref, NULL);
1868 }
1869
1870 static void get_dav_remote_heads(void)
1871 {
1872 remote_tail = &remote_refs;
1873 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1874 }
1875
1876 static int is_zero_sha1(const unsigned char *sha1)
1877 {
1878 int i;
1879
1880 for (i = 0; i < 20; i++) {
1881 if (*sha1++)
1882 return 0;
1883 }
1884 return 1;
1885 }
1886
1887 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1888 {
1889 while (list) {
1890 struct commit_list *temp = list;
1891 temp->item->object.flags &= ~mark;
1892 list = temp->next;
1893 free(temp);
1894 }
1895 }
1896
1897 static int ref_newer(const unsigned char *new_sha1,
1898 const unsigned char *old_sha1)
1899 {
1900 struct object *o;
1901 struct commit *old, *new;
1902 struct commit_list *list, *used;
1903 int found = 0;
1904
1905 /* Both new and old must be commit-ish and new is descendant of
1906 * old. Otherwise we require --force.
1907 */
1908 o = deref_tag(parse_object(old_sha1), NULL, 0);
1909 if (!o || o->type != OBJ_COMMIT)
1910 return 0;
1911 old = (struct commit *) o;
1912
1913 o = deref_tag(parse_object(new_sha1), NULL, 0);
1914 if (!o || o->type != OBJ_COMMIT)
1915 return 0;
1916 new = (struct commit *) o;
1917
1918 if (parse_commit(new) < 0)
1919 return 0;
1920
1921 used = list = NULL;
1922 commit_list_insert(new, &list);
1923 while (list) {
1924 new = pop_most_recent_commit(&list, TMP_MARK);
1925 commit_list_insert(new, &used);
1926 if (new == old) {
1927 found = 1;
1928 break;
1929 }
1930 }
1931 unmark_and_free(list, TMP_MARK);
1932 unmark_and_free(used, TMP_MARK);
1933 return found;
1934 }
1935
1936 static void mark_edge_parents_uninteresting(struct commit *commit)
1937 {
1938 struct commit_list *parents;
1939
1940 for (parents = commit->parents; parents; parents = parents->next) {
1941 struct commit *parent = parents->item;
1942 if (!(parent->object.flags & UNINTERESTING))
1943 continue;
1944 mark_tree_uninteresting(parent->tree);
1945 }
1946 }
1947
1948 static void mark_edges_uninteresting(struct commit_list *list)
1949 {
1950 for ( ; list; list = list->next) {
1951 struct commit *commit = list->item;
1952
1953 if (commit->object.flags & UNINTERESTING) {
1954 mark_tree_uninteresting(commit->tree);
1955 continue;
1956 }
1957 mark_edge_parents_uninteresting(commit);
1958 }
1959 }
1960
1961 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1962 {
1963 struct strbuf *buf = (struct strbuf *)ls->userData;
1964 unsigned char remote_sha1[20];
1965 struct object *o;
1966 int len;
1967 char *ref_info;
1968
1969 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
1970 fprintf(stderr,
1971 "Unable to fetch ref %s from %s\n",
1972 ls->dentry_name, remote->url);
1973 aborted = 1;
1974 return;
1975 }
1976
1977 o = parse_object(remote_sha1);
1978 if (!o) {
1979 fprintf(stderr,
1980 "Unable to parse object %s for remote ref %s\n",
1981 sha1_to_hex(remote_sha1), ls->dentry_name);
1982 aborted = 1;
1983 return;
1984 }
1985
1986 len = strlen(ls->dentry_name) + 42;
1987 ref_info = xcalloc(len + 1, 1);
1988 sprintf(ref_info, "%s %s\n",
1989 sha1_to_hex(remote_sha1), ls->dentry_name);
1990 fwrite_buffer(ref_info, 1, len, buf);
1991 free(ref_info);
1992
1993 if (o->type == OBJ_TAG) {
1994 o = deref_tag(o, ls->dentry_name, 0);
1995 if (o) {
1996 len = strlen(ls->dentry_name) + 45;
1997 ref_info = xcalloc(len + 1, 1);
1998 sprintf(ref_info, "%s %s^{}\n",
1999 sha1_to_hex(o->sha1), ls->dentry_name);
2000 fwrite_buffer(ref_info, 1, len, buf);
2001 free(ref_info);
2002 }
2003 }
2004 }
2005
2006 static void update_remote_info_refs(struct remote_lock *lock)
2007 {
2008 struct buffer buffer = { STRBUF_INIT, 0 };
2009 struct active_request_slot *slot;
2010 struct slot_results results;
2011 char *if_header;
2012 struct curl_slist *dav_headers = NULL;
2013
2014 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2015 add_remote_info_ref, &buffer.buf);
2016 if (!aborted) {
2017 if_header = xmalloc(strlen(lock->token) + 25);
2018 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2019 dav_headers = curl_slist_append(dav_headers, if_header);
2020
2021 slot = get_active_slot();
2022 slot->results = &results;
2023 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2024 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
2025 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2026 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2027 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2028 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2029 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2030 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2031 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2032
2033 if (start_active_slot(slot)) {
2034 run_active_slot(slot);
2035 if (results.curl_result != CURLE_OK) {
2036 fprintf(stderr,
2037 "PUT error: curl result=%d, HTTP code=%ld\n",
2038 results.curl_result, results.http_code);
2039 }
2040 }
2041 free(if_header);
2042 }
2043 strbuf_release(&buffer.buf);
2044 }
2045
2046 static int remote_exists(const char *path)
2047 {
2048 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2049 struct active_request_slot *slot;
2050 struct slot_results results;
2051 int ret = -1;
2052
2053 sprintf(url, "%s%s", remote->url, path);
2054
2055 slot = get_active_slot();
2056 slot->results = &results;
2057 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2058 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2059
2060 if (start_active_slot(slot)) {
2061 run_active_slot(slot);
2062 free(url);
2063 if (results.http_code == 404)
2064 ret = 0;
2065 else if (results.curl_result == CURLE_OK)
2066 ret = 1;
2067 else
2068 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2069 } else {
2070 free(url);
2071 fprintf(stderr, "Unable to start HEAD request\n");
2072 }
2073
2074 free(url);
2075 return ret;
2076 }
2077
2078 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2079 {
2080 char *url;
2081 struct strbuf buffer = STRBUF_INIT;
2082 struct active_request_slot *slot;
2083 struct slot_results results;
2084
2085 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2086 sprintf(url, "%s%s", remote->url, path);
2087
2088 slot = get_active_slot();
2089 slot->results = &results;
2090 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2091 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2092 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2093 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2094 if (start_active_slot(slot)) {
2095 run_active_slot(slot);
2096 if (results.curl_result != CURLE_OK) {
2097 die("Couldn't get %s for remote symref\n%s",
2098 url, curl_errorstr);
2099 }
2100 } else {
2101 die("Unable to start remote symref request");
2102 }
2103 free(url);
2104
2105 if (*symref != NULL)
2106 free(*symref);
2107 *symref = NULL;
2108 hashclr(sha1);
2109
2110 if (buffer.len == 0)
2111 return;
2112
2113 /* If it's a symref, set the refname; otherwise try for a sha1 */
2114 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2115 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2116 } else {
2117 get_sha1_hex(buffer.buf, sha1);
2118 }
2119
2120 strbuf_release(&buffer);
2121 }
2122
2123 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2124 {
2125 struct commit *head = lookup_commit(head_sha1);
2126 struct commit *branch = lookup_commit(branch_sha1);
2127 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2128
2129 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2130 }
2131
2132 static int delete_remote_branch(char *pattern, int force)
2133 {
2134 struct ref *refs = remote_refs;
2135 struct ref *remote_ref = NULL;
2136 unsigned char head_sha1[20];
2137 char *symref = NULL;
2138 int match;
2139 int patlen = strlen(pattern);
2140 int i;
2141 struct active_request_slot *slot;
2142 struct slot_results results;
2143 char *url;
2144
2145 /* Find the remote branch(es) matching the specified branch name */
2146 for (match = 0; refs; refs = refs->next) {
2147 char *name = refs->name;
2148 int namelen = strlen(name);
2149 if (namelen < patlen ||
2150 memcmp(name + namelen - patlen, pattern, patlen))
2151 continue;
2152 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2153 continue;
2154 match++;
2155 remote_ref = refs;
2156 }
2157 if (match == 0)
2158 return error("No remote branch matches %s", pattern);
2159 if (match != 1)
2160 return error("More than one remote branch matches %s",
2161 pattern);
2162
2163 /*
2164 * Remote HEAD must be a symref (not exactly foolproof; a remote
2165 * symlink to a symref will look like a symref)
2166 */
2167 fetch_symref("HEAD", &symref, head_sha1);
2168 if (!symref)
2169 return error("Remote HEAD is not a symref");
2170
2171 /* Remote branch must not be the remote HEAD */
2172 for (i=0; symref && i<MAXDEPTH; i++) {
2173 if (!strcmp(remote_ref->name, symref))
2174 return error("Remote branch %s is the current HEAD",
2175 remote_ref->name);
2176 fetch_symref(symref, &symref, head_sha1);
2177 }
2178
2179 /* Run extra sanity checks if delete is not forced */
2180 if (!force) {
2181 /* Remote HEAD must resolve to a known object */
2182 if (symref)
2183 return error("Remote HEAD symrefs too deep");
2184 if (is_zero_sha1(head_sha1))
2185 return error("Unable to resolve remote HEAD");
2186 if (!has_sha1_file(head_sha1))
2187 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2188
2189 /* Remote branch must resolve to a known object */
2190 if (is_zero_sha1(remote_ref->old_sha1))
2191 return error("Unable to resolve remote branch %s",
2192 remote_ref->name);
2193 if (!has_sha1_file(remote_ref->old_sha1))
2194 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));
2195
2196 /* Remote branch must be an ancestor of remote HEAD */
2197 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2198 return error("The branch '%s' is not an ancestor "
2199 "of your current HEAD.\n"
2200 "If you are sure you want to delete it,"
2201 " run:\n\t'git http-push -D %s %s'",
2202 remote_ref->name, remote->url, pattern);
2203 }
2204 }
2205
2206 /* Send delete request */
2207 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2208 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2209 sprintf(url, "%s%s", remote->url, remote_ref->name);
2210 slot = get_active_slot();
2211 slot->results = &results;
2212 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2213 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2214 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2215 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2216 if (start_active_slot(slot)) {
2217 run_active_slot(slot);
2218 free(url);
2219 if (results.curl_result != CURLE_OK)
2220 return error("DELETE request failed (%d/%ld)\n",
2221 results.curl_result, results.http_code);
2222 } else {
2223 free(url);
2224 return error("Unable to start DELETE request");
2225 }
2226
2227 return 0;
2228 }
2229
2230 int main(int argc, char **argv)
2231 {
2232 struct transfer_request *request;
2233 struct transfer_request *next_request;
2234 int nr_refspec = 0;
2235 char **refspec = NULL;
2236 struct remote_lock *ref_lock = NULL;
2237 struct remote_lock *info_ref_lock = NULL;
2238 struct rev_info revs;
2239 int delete_branch = 0;
2240 int force_delete = 0;
2241 int objects_to_send;
2242 int rc = 0;
2243 int i;
2244 int new_refs;
2245 struct ref *ref;
2246
2247 setup_git_directory();
2248
2249 remote = xcalloc(sizeof(*remote), 1);
2250
2251 argv++;
2252 for (i = 1; i < argc; i++, argv++) {
2253 char *arg = *argv;
2254
2255 if (*arg == '-') {
2256 if (!strcmp(arg, "--all")) {
2257 push_all = MATCH_REFS_ALL;
2258 continue;
2259 }
2260 if (!strcmp(arg, "--force")) {
2261 force_all = 1;
2262 continue;
2263 }
2264 if (!strcmp(arg, "--dry-run")) {
2265 dry_run = 1;
2266 continue;
2267 }
2268 if (!strcmp(arg, "--verbose")) {
2269 push_verbosely = 1;
2270 continue;
2271 }
2272 if (!strcmp(arg, "-d")) {
2273 delete_branch = 1;
2274 continue;
2275 }
2276 if (!strcmp(arg, "-D")) {
2277 delete_branch = 1;
2278 force_delete = 1;
2279 continue;
2280 }
2281 }
2282 if (!remote->url) {
2283 char *path = strstr(arg, "//");
2284 remote->url = arg;
2285 if (path) {
2286 path = strchr(path+2, '/');
2287 if (path)
2288 remote->path_len = strlen(path);
2289 }
2290 continue;
2291 }
2292 refspec = argv;
2293 nr_refspec = argc - i;
2294 break;
2295 }
2296
2297 if (!remote->url)
2298 usage(http_push_usage);
2299
2300 if (delete_branch && nr_refspec != 1)
2301 die("You must specify only one branch name when deleting a remote branch");
2302
2303 memset(remote_dir_exists, -1, 256);
2304
2305 http_init();
2306
2307 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2308
2309 /* Verify DAV compliance/lock support */
2310 if (!locking_available()) {
2311 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2312 rc = 1;
2313 goto cleanup;
2314 }
2315
2316 /* Check whether the remote has server info files */
2317 remote->can_update_info_refs = 0;
2318 remote->has_info_refs = remote_exists("info/refs");
2319 remote->has_info_packs = remote_exists("objects/info/packs");
2320 if (remote->has_info_refs) {
2321 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2322 if (info_ref_lock)
2323 remote->can_update_info_refs = 1;
2324 }
2325 if (remote->has_info_packs)
2326 fetch_indices();
2327
2328 /* Get a list of all local and remote heads to validate refspecs */
2329 get_local_heads();
2330 fprintf(stderr, "Fetching remote heads...\n");
2331 get_dav_remote_heads();
2332
2333 /* Remove a remote branch if -d or -D was specified */
2334 if (delete_branch) {
2335 if (delete_remote_branch(refspec[0], force_delete) == -1)
2336 fprintf(stderr, "Unable to delete remote branch %s\n",
2337 refspec[0]);
2338 goto cleanup;
2339 }
2340
2341 /* match them up */
2342 if (!remote_tail)
2343 remote_tail = &remote_refs;
2344 if (match_refs(local_refs, remote_refs, &remote_tail,
2345 nr_refspec, (const char **) refspec, push_all))
2346 return -1;
2347 if (!remote_refs) {
2348 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2349 return 0;
2350 }
2351
2352 new_refs = 0;
2353 for (ref = remote_refs; ref; ref = ref->next) {
2354 char old_hex[60], *new_hex;
2355 const char *commit_argv[4];
2356 int commit_argc;
2357 char *new_sha1_hex, *old_sha1_hex;
2358
2359 if (!ref->peer_ref)
2360 continue;
2361 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2362 if (push_verbosely || 1)
2363 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2364 continue;
2365 }
2366
2367 if (!force_all &&
2368 !is_zero_sha1(ref->old_sha1) &&
2369 !ref->force) {
2370 if (!has_sha1_file(ref->old_sha1) ||
2371 !ref_newer(ref->peer_ref->new_sha1,
2372 ref->old_sha1)) {
2373 /*
2374 * We do not have the remote ref, or
2375 * we know that the remote ref is not
2376 * an ancestor of what we are trying to
2377 * push. Either way this can be losing
2378 * commits at the remote end and likely
2379 * we were not up to date to begin with.
2380 */
2381 error("remote '%s' is not an ancestor of\n"
2382 "local '%s'.\n"
2383 "Maybe you are not up-to-date and "
2384 "need to pull first?",
2385 ref->name,
2386 ref->peer_ref->name);
2387 rc = -2;
2388 continue;
2389 }
2390 }
2391 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2392 if (is_zero_sha1(ref->new_sha1)) {
2393 error("cannot happen anymore");
2394 rc = -3;
2395 continue;
2396 }
2397 new_refs++;
2398 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2399 new_hex = sha1_to_hex(ref->new_sha1);
2400
2401 fprintf(stderr, "updating '%s'", ref->name);
2402 if (strcmp(ref->name, ref->peer_ref->name))
2403 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2404 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2405 if (dry_run)
2406 continue;
2407
2408 /* Lock remote branch ref */
2409 ref_lock = lock_remote(ref->name, LOCK_TIME);
2410 if (ref_lock == NULL) {
2411 fprintf(stderr, "Unable to lock remote branch %s\n",
2412 ref->name);
2413 rc = 1;
2414 continue;
2415 }
2416
2417 /* Set up revision info for this refspec */
2418 commit_argc = 3;
2419 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2420 old_sha1_hex = NULL;
2421 commit_argv[1] = "--objects";
2422 commit_argv[2] = new_sha1_hex;
2423 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2424 old_sha1_hex = xmalloc(42);
2425 sprintf(old_sha1_hex, "^%s",
2426 sha1_to_hex(ref->old_sha1));
2427 commit_argv[3] = old_sha1_hex;
2428 commit_argc++;
2429 }
2430 init_revisions(&revs, setup_git_directory());
2431 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2432 free(new_sha1_hex);
2433 if (old_sha1_hex) {
2434 free(old_sha1_hex);
2435 commit_argv[1] = NULL;
2436 }
2437
2438 /* Generate a list of objects that need to be pushed */
2439 pushing = 0;
2440 prepare_revision_walk(&revs);
2441 mark_edges_uninteresting(revs.commits);
2442 objects_to_send = get_delta(&revs, ref_lock);
2443 finish_all_active_slots();
2444
2445 /* Push missing objects to remote, this would be a
2446 convenient time to pack them first if appropriate. */
2447 pushing = 1;
2448 if (objects_to_send)
2449 fprintf(stderr, " sending %d objects\n",
2450 objects_to_send);
2451 #ifdef USE_CURL_MULTI
2452 fill_active_slots();
2453 add_fill_function(NULL, fill_active_slot);
2454 #endif
2455 finish_all_active_slots();
2456
2457 /* Update the remote branch if all went well */
2458 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2459 rc = 1;
2460 goto unlock;
2461 }
2462
2463 unlock:
2464 if (!rc)
2465 fprintf(stderr, " done\n");
2466 unlock_remote(ref_lock);
2467 check_locks();
2468 }
2469
2470 /* Update remote server info if appropriate */
2471 if (remote->has_info_refs && new_refs) {
2472 if (info_ref_lock && remote->can_update_info_refs) {
2473 fprintf(stderr, "Updating remote server info\n");
2474 if (!dry_run)
2475 update_remote_info_refs(info_ref_lock);
2476 } else {
2477 fprintf(stderr, "Unable to update server info\n");
2478 }
2479 }
2480 if (info_ref_lock)
2481 unlock_remote(info_ref_lock);
2482
2483 cleanup:
2484 free(remote);
2485
2486 curl_slist_free_all(no_pragma_header);
2487
2488 http_cleanup();
2489
2490 request = request_queue_head;
2491 while (request != NULL) {
2492 next_request = request->next;
2493 release_request(request);
2494 request = next_request;
2495 }
2496
2497 return rc;
2498 }
Unnamed repository; edit this file 'description' to name the repository.