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http-push: refactor request url creation
[git/spearce.git] / http-push.c
blobba5cc32584d9e2f9f372cd2e8ecabcf7049ec2b3
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 #include "list-objects.h"
13
14 #include <expat.h>
15
16 static const char http_push_usage[] =
17 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
18
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21 XML_STATUS_OK = 1,
22 XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK 1
25 #define XML_STATUS_ERROR 0
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
39
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
44
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
55
56 /* DAV request body templates */
57 #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>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #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>"
60
61 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
63
64 /* bits #0-15 in revision.h */
65
66 #define LOCAL (1u<<16)
67 #define REMOTE (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING (1u<<19)
70
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
73
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
77
78 static struct curl_slist *no_pragma_header;
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 char *path;
91 int path_len;
92 int has_info_refs;
93 int can_update_info_refs;
94 int has_info_packs;
95 struct packed_git *packs;
96 struct remote_lock *locks;
97 };
98
99 static struct repo *remote;
100
101 enum transfer_state {
102 NEED_FETCH,
103 RUN_FETCH_LOOSE,
104 RUN_FETCH_PACKED,
105 NEED_PUSH,
106 RUN_MKCOL,
107 RUN_PUT,
108 RUN_MOVE,
109 ABORTED,
110 COMPLETE,
111 };
112
113 struct transfer_request
114 {
115 struct object *obj;
116 char *url;
117 char *dest;
118 struct remote_lock *lock;
119 struct curl_slist *headers;
120 struct buffer buffer;
121 char filename[PATH_MAX];
122 char tmpfile[PATH_MAX];
123 int local_fileno;
124 FILE *local_stream;
125 enum transfer_state state;
126 CURLcode curl_result;
127 char errorstr[CURL_ERROR_SIZE];
128 long http_code;
129 unsigned char real_sha1[20];
130 git_SHA_CTX c;
131 z_stream stream;
132 int zret;
133 int rename;
134 void *userData;
135 struct active_request_slot *slot;
136 struct transfer_request *next;
137 };
138
139 static struct transfer_request *request_queue_head;
140
141 struct xml_ctx
142 {
143 char *name;
144 int len;
145 char *cdata;
146 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
147 void *userData;
148 };
149
150 struct remote_lock
151 {
152 char *url;
153 char *owner;
154 char *token;
155 time_t start_time;
156 long timeout;
157 int refreshing;
158 struct remote_lock *next;
159 };
160
161 /* Flags that control remote_ls processing */
162 #define PROCESS_FILES (1u << 0)
163 #define PROCESS_DIRS (1u << 1)
164 #define RECURSIVE (1u << 2)
165
166 /* Flags that remote_ls passes to callback functions */
167 #define IS_DIR (1u << 0)
168
169 struct remote_ls_ctx
170 {
171 char *path;
172 void (*userFunc)(struct remote_ls_ctx *ls);
173 void *userData;
174 int flags;
175 char *dentry_name;
176 int dentry_flags;
177 struct remote_ls_ctx *parent;
178 };
179
180 /* get_dav_token_headers options */
181 enum dav_header_flag {
182 DAV_HEADER_IF = (1u << 0),
183 DAV_HEADER_LOCK = (1u << 1),
184 DAV_HEADER_TIMEOUT = (1u << 2)
185 };
186
187 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
188 {
189 struct strbuf buf = STRBUF_INIT;
190 struct curl_slist *dav_headers = NULL;
191
192 if (options & DAV_HEADER_IF) {
193 strbuf_addf(&buf, "If: (<%s>)", lock->token);
194 dav_headers = curl_slist_append(dav_headers, buf.buf);
195 strbuf_reset(&buf);
196 }
197 if (options & DAV_HEADER_LOCK) {
198 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
199 dav_headers = curl_slist_append(dav_headers, buf.buf);
200 strbuf_reset(&buf);
201 }
202 if (options & DAV_HEADER_TIMEOUT) {
203 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
204 dav_headers = curl_slist_append(dav_headers, buf.buf);
205 strbuf_reset(&buf);
206 }
207 strbuf_release(&buf);
208
209 return dav_headers;
210 }
211
212 static void append_remote_object_url(struct strbuf *buf, const char *url,
213 const char *hex,
214 int only_two_digit_prefix)
215 {
216 strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
217 if (!only_two_digit_prefix)
218 strbuf_addf(buf, "%s", hex+2);
219 }
220
221 static char *get_remote_object_url(const char *url, const char *hex, int only_two_digit_prefix)
222 {
223 struct strbuf buf = STRBUF_INIT;
224 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
225 return strbuf_detach(&buf, NULL);
226 }
227
228 static void finish_request(struct transfer_request *request);
229 static void release_request(struct transfer_request *request);
230
231 static void process_response(void *callback_data)
232 {
233 struct transfer_request *request =
234 (struct transfer_request *)callback_data;
235
236 finish_request(request);
237 }
238
239 #ifdef USE_CURL_MULTI
240 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
241 void *data)
242 {
243 unsigned char expn[4096];
244 size_t size = eltsize * nmemb;
245 int posn = 0;
246 struct transfer_request *request = (struct transfer_request *)data;
247 do {
248 ssize_t retval = xwrite(request->local_fileno,
249 (char *) ptr + posn, size - posn);
250 if (retval < 0)
251 return posn;
252 posn += retval;
253 } while (posn < size);
254
255 request->stream.avail_in = size;
256 request->stream.next_in = ptr;
257 do {
258 request->stream.next_out = expn;
259 request->stream.avail_out = sizeof(expn);
260 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
261 git_SHA1_Update(&request->c, expn,
262 sizeof(expn) - request->stream.avail_out);
263 } while (request->stream.avail_in && request->zret == Z_OK);
264 data_received++;
265 return size;
266 }
267
268 static void start_fetch_loose(struct transfer_request *request)
269 {
270 char *hex = sha1_to_hex(request->obj->sha1);
271 char *filename;
272 char prevfile[PATH_MAX];
273 char *url;
274 int prevlocal;
275 unsigned char prev_buf[PREV_BUF_SIZE];
276 ssize_t prev_read = 0;
277 long prev_posn = 0;
278 char range[RANGE_HEADER_SIZE];
279 struct curl_slist *range_header = NULL;
280 struct active_request_slot *slot;
281
282 filename = sha1_file_name(request->obj->sha1);
283 snprintf(request->filename, sizeof(request->filename), "%s", filename);
284 snprintf(request->tmpfile, sizeof(request->tmpfile),
285 "%s.temp", filename);
286
287 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
288 unlink(prevfile);
289 rename(request->tmpfile, prevfile);
290 unlink(request->tmpfile);
291
292 if (request->local_fileno != -1)
293 error("fd leakage in start: %d", request->local_fileno);
294 request->local_fileno = open(request->tmpfile,
295 O_WRONLY | O_CREAT | O_EXCL, 0666);
296 /* This could have failed due to the "lazy directory creation";
297 * try to mkdir the last path component.
298 */
299 if (request->local_fileno < 0 && errno == ENOENT) {
300 char *dir = strrchr(request->tmpfile, '/');
301 if (dir) {
302 *dir = 0;
303 mkdir(request->tmpfile, 0777);
304 *dir = '/';
305 }
306 request->local_fileno = open(request->tmpfile,
307 O_WRONLY | O_CREAT | O_EXCL, 0666);
308 }
309
310 if (request->local_fileno < 0) {
311 request->state = ABORTED;
312 error("Couldn't create temporary file %s for %s: %s",
313 request->tmpfile, request->filename, strerror(errno));
314 return;
315 }
316
317 memset(&request->stream, 0, sizeof(request->stream));
318
319 git_inflate_init(&request->stream);
320
321 git_SHA1_Init(&request->c);
322
323 url = get_remote_object_url(remote->url, hex, 0);
324 request->url = xstrdup(url);
325
326 /* If a previous temp file is present, process what was already
327 fetched. */
328 prevlocal = open(prevfile, O_RDONLY);
329 if (prevlocal != -1) {
330 do {
331 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
332 if (prev_read>0) {
333 if (fwrite_sha1_file(prev_buf,
334 1,
335 prev_read,
336 request) == prev_read) {
337 prev_posn += prev_read;
338 } else {
339 prev_read = -1;
340 }
341 }
342 } while (prev_read > 0);
343 close(prevlocal);
344 }
345 unlink(prevfile);
346
347 /* Reset inflate/SHA1 if there was an error reading the previous temp
348 file; also rewind to the beginning of the local file. */
349 if (prev_read == -1) {
350 memset(&request->stream, 0, sizeof(request->stream));
351 git_inflate_init(&request->stream);
352 git_SHA1_Init(&request->c);
353 if (prev_posn>0) {
354 prev_posn = 0;
355 lseek(request->local_fileno, 0, SEEK_SET);
356 ftruncate(request->local_fileno, 0);
357 }
358 }
359
360 slot = get_active_slot();
361 slot->callback_func = process_response;
362 slot->callback_data = request;
363 request->slot = slot;
364
365 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
366 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
367 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
368 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
369 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
370
371 /* If we have successfully processed data from a previous fetch
372 attempt, only fetch the data we don't already have. */
373 if (prev_posn>0) {
374 if (push_verbosely)
375 fprintf(stderr,
376 "Resuming fetch of object %s at byte %ld\n",
377 hex, prev_posn);
378 sprintf(range, "Range: bytes=%ld-", prev_posn);
379 range_header = curl_slist_append(range_header, range);
380 curl_easy_setopt(slot->curl,
381 CURLOPT_HTTPHEADER, range_header);
382 }
383
384 /* Try to get the request started, abort the request on error */
385 request->state = RUN_FETCH_LOOSE;
386 if (!start_active_slot(slot)) {
387 fprintf(stderr, "Unable to start GET request\n");
388 remote->can_update_info_refs = 0;
389 release_request(request);
390 }
391 }
392
393 static void start_mkcol(struct transfer_request *request)
394 {
395 char *hex = sha1_to_hex(request->obj->sha1);
396 struct active_request_slot *slot;
397
398 request->url = get_remote_object_url(remote->url, hex, 1);
399
400 slot = get_active_slot();
401 slot->callback_func = process_response;
402 slot->callback_data = request;
403 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
404 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
405 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
406 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
407 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
408
409 if (start_active_slot(slot)) {
410 request->slot = slot;
411 request->state = RUN_MKCOL;
412 } else {
413 request->state = ABORTED;
414 free(request->url);
415 request->url = NULL;
416 }
417 }
418 #endif
419
420 static void start_fetch_packed(struct transfer_request *request)
421 {
422 char *url;
423 struct packed_git *target;
424 FILE *packfile;
425 char *filename;
426 long prev_posn = 0;
427 char range[RANGE_HEADER_SIZE];
428 struct curl_slist *range_header = NULL;
429
430 struct transfer_request *check_request = request_queue_head;
431 struct active_request_slot *slot;
432
433 target = find_sha1_pack(request->obj->sha1, remote->packs);
434 if (!target) {
435 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
436 remote->can_update_info_refs = 0;
437 release_request(request);
438 return;
439 }
440
441 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
442 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
443
444 filename = sha1_pack_name(target->sha1);
445 snprintf(request->filename, sizeof(request->filename), "%s", filename);
446 snprintf(request->tmpfile, sizeof(request->tmpfile),
447 "%s.temp", filename);
448
449 url = xmalloc(strlen(remote->url) + 64);
450 sprintf(url, "%sobjects/pack/pack-%s.pack",
451 remote->url, sha1_to_hex(target->sha1));
452
453 /* Make sure there isn't another open request for this pack */
454 while (check_request) {
455 if (check_request->state == RUN_FETCH_PACKED &&
456 !strcmp(check_request->url, url)) {
457 free(url);
458 release_request(request);
459 return;
460 }
461 check_request = check_request->next;
462 }
463
464 packfile = fopen(request->tmpfile, "a");
465 if (!packfile) {
466 fprintf(stderr, "Unable to open local file %s for pack",
467 request->tmpfile);
468 remote->can_update_info_refs = 0;
469 free(url);
470 return;
471 }
472
473 slot = get_active_slot();
474 slot->callback_func = process_response;
475 slot->callback_data = request;
476 request->slot = slot;
477 request->local_stream = packfile;
478 request->userData = target;
479
480 request->url = url;
481 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
482 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
483 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
484 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
485 slot->local = packfile;
486
487 /* If there is data present from a previous transfer attempt,
488 resume where it left off */
489 prev_posn = ftell(packfile);
490 if (prev_posn>0) {
491 if (push_verbosely)
492 fprintf(stderr,
493 "Resuming fetch of pack %s at byte %ld\n",
494 sha1_to_hex(target->sha1), prev_posn);
495 sprintf(range, "Range: bytes=%ld-", prev_posn);
496 range_header = curl_slist_append(range_header, range);
497 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
498 }
499
500 /* Try to get the request started, abort the request on error */
501 request->state = RUN_FETCH_PACKED;
502 if (!start_active_slot(slot)) {
503 fprintf(stderr, "Unable to start GET request\n");
504 remote->can_update_info_refs = 0;
505 release_request(request);
506 }
507 }
508
509 static void start_put(struct transfer_request *request)
510 {
511 char *hex = sha1_to_hex(request->obj->sha1);
512 struct active_request_slot *slot;
513 struct strbuf buf = STRBUF_INIT;
514 enum object_type type;
515 char hdr[50];
516 void *unpacked;
517 unsigned long len;
518 int hdrlen;
519 ssize_t size;
520 z_stream stream;
521
522 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
523 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
524
525 /* Set it up */
526 memset(&stream, 0, sizeof(stream));
527 deflateInit(&stream, zlib_compression_level);
528 size = deflateBound(&stream, len + hdrlen);
529 strbuf_init(&request->buffer.buf, size);
530 request->buffer.posn = 0;
531
532 /* Compress it */
533 stream.next_out = (unsigned char *)request->buffer.buf.buf;
534 stream.avail_out = size;
535
536 /* First header.. */
537 stream.next_in = (void *)hdr;
538 stream.avail_in = hdrlen;
539 while (deflate(&stream, 0) == Z_OK)
540 /* nothing */;
541
542 /* Then the data itself.. */
543 stream.next_in = unpacked;
544 stream.avail_in = len;
545 while (deflate(&stream, Z_FINISH) == Z_OK)
546 /* nothing */;
547 deflateEnd(&stream);
548 free(unpacked);
549
550 request->buffer.buf.len = stream.total_out;
551
552 strbuf_addstr(&buf, "Destination: ");
553 append_remote_object_url(&buf, remote->url, hex, 0);
554 request->dest = strbuf_detach(&buf, NULL);
555
556 append_remote_object_url(&buf, remote->url, hex, 0);
557 strbuf_addstr(&buf, request->lock->token);
558 request->url = strbuf_detach(&buf, NULL);
559
560 slot = get_active_slot();
561 slot->callback_func = process_response;
562 slot->callback_data = request;
563 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
564 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
565 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
566 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
567 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
568 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
569 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
570 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
571 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
572
573 if (start_active_slot(slot)) {
574 request->slot = slot;
575 request->state = RUN_PUT;
576 } else {
577 request->state = ABORTED;
578 free(request->url);
579 request->url = NULL;
580 }
581 }
582
583 static void start_move(struct transfer_request *request)
584 {
585 struct active_request_slot *slot;
586 struct curl_slist *dav_headers = NULL;
587
588 slot = get_active_slot();
589 slot->callback_func = process_response;
590 slot->callback_data = request;
591 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
592 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
593 dav_headers = curl_slist_append(dav_headers, request->dest);
594 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
595 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
596 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
597 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
598
599 if (start_active_slot(slot)) {
600 request->slot = slot;
601 request->state = RUN_MOVE;
602 } else {
603 request->state = ABORTED;
604 free(request->url);
605 request->url = NULL;
606 }
607 }
608
609 static int refresh_lock(struct remote_lock *lock)
610 {
611 struct active_request_slot *slot;
612 struct slot_results results;
613 struct curl_slist *dav_headers;
614 int rc = 0;
615
616 lock->refreshing = 1;
617
618 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
619
620 slot = get_active_slot();
621 slot->results = &results;
622 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
623 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
624 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
625 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
626 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
627
628 if (start_active_slot(slot)) {
629 run_active_slot(slot);
630 if (results.curl_result != CURLE_OK) {
631 fprintf(stderr, "LOCK HTTP error %ld\n",
632 results.http_code);
633 } else {
634 lock->start_time = time(NULL);
635 rc = 1;
636 }
637 }
638
639 lock->refreshing = 0;
640 curl_slist_free_all(dav_headers);
641
642 return rc;
643 }
644
645 static void check_locks(void)
646 {
647 struct remote_lock *lock = remote->locks;
648 time_t current_time = time(NULL);
649 int time_remaining;
650
651 while (lock) {
652 time_remaining = lock->start_time + lock->timeout -
653 current_time;
654 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
655 if (!refresh_lock(lock)) {
656 fprintf(stderr,
657 "Unable to refresh lock for %s\n",
658 lock->url);
659 aborted = 1;
660 return;
661 }
662 }
663 lock = lock->next;
664 }
665 }
666
667 static void release_request(struct transfer_request *request)
668 {
669 struct transfer_request *entry = request_queue_head;
670
671 if (request == request_queue_head) {
672 request_queue_head = request->next;
673 } else {
674 while (entry->next != NULL && entry->next != request)
675 entry = entry->next;
676 if (entry->next == request)
677 entry->next = entry->next->next;
678 }
679
680 if (request->local_fileno != -1)
681 close(request->local_fileno);
682 if (request->local_stream)
683 fclose(request->local_stream);
684 free(request->url);
685 free(request);
686 }
687
688 static void finish_request(struct transfer_request *request)
689 {
690 struct stat st;
691 struct packed_git *target;
692 struct packed_git **lst;
693
694 request->curl_result = request->slot->curl_result;
695 request->http_code = request->slot->http_code;
696 request->slot = NULL;
697
698 /* Keep locks active */
699 check_locks();
700
701 if (request->headers != NULL)
702 curl_slist_free_all(request->headers);
703
704 /* URL is reused for MOVE after PUT */
705 if (request->state != RUN_PUT) {
706 free(request->url);
707 request->url = NULL;
708 }
709
710 if (request->state == RUN_MKCOL) {
711 if (request->curl_result == CURLE_OK ||
712 request->http_code == 405) {
713 remote_dir_exists[request->obj->sha1[0]] = 1;
714 start_put(request);
715 } else {
716 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
717 sha1_to_hex(request->obj->sha1),
718 request->curl_result, request->http_code);
719 request->state = ABORTED;
720 aborted = 1;
721 }
722 } else if (request->state == RUN_PUT) {
723 if (request->curl_result == CURLE_OK) {
724 start_move(request);
725 } else {
726 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
727 sha1_to_hex(request->obj->sha1),
728 request->curl_result, request->http_code);
729 request->state = ABORTED;
730 aborted = 1;
731 }
732 } else if (request->state == RUN_MOVE) {
733 if (request->curl_result == CURLE_OK) {
734 if (push_verbosely)
735 fprintf(stderr, " sent %s\n",
736 sha1_to_hex(request->obj->sha1));
737 request->obj->flags |= REMOTE;
738 release_request(request);
739 } else {
740 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
741 sha1_to_hex(request->obj->sha1),
742 request->curl_result, request->http_code);
743 request->state = ABORTED;
744 aborted = 1;
745 }
746 } else if (request->state == RUN_FETCH_LOOSE) {
747 fchmod(request->local_fileno, 0444);
748 close(request->local_fileno); request->local_fileno = -1;
749
750 if (request->curl_result != CURLE_OK &&
751 request->http_code != 416) {
752 if (stat(request->tmpfile, &st) == 0) {
753 if (st.st_size == 0)
754 unlink(request->tmpfile);
755 }
756 } else {
757 if (request->http_code == 416)
758 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
759
760 git_inflate_end(&request->stream);
761 git_SHA1_Final(request->real_sha1, &request->c);
762 if (request->zret != Z_STREAM_END) {
763 unlink(request->tmpfile);
764 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
765 unlink(request->tmpfile);
766 } else {
767 request->rename =
768 move_temp_to_file(
769 request->tmpfile,
770 request->filename);
771 if (request->rename == 0) {
772 request->obj->flags |= (LOCAL | REMOTE);
773 }
774 }
775 }
776
777 /* Try fetching packed if necessary */
778 if (request->obj->flags & LOCAL)
779 release_request(request);
780 else
781 start_fetch_packed(request);
782
783 } else if (request->state == RUN_FETCH_PACKED) {
784 if (request->curl_result != CURLE_OK) {
785 fprintf(stderr, "Unable to get pack file %s\n%s",
786 request->url, curl_errorstr);
787 remote->can_update_info_refs = 0;
788 } else {
789 off_t pack_size = ftell(request->local_stream);
790
791 fclose(request->local_stream);
792 request->local_stream = NULL;
793 if (!move_temp_to_file(request->tmpfile,
794 request->filename)) {
795 target = (struct packed_git *)request->userData;
796 target->pack_size = pack_size;
797 lst = &remote->packs;
798 while (*lst != target)
799 lst = &((*lst)->next);
800 *lst = (*lst)->next;
801
802 if (!verify_pack(target))
803 install_packed_git(target);
804 else
805 remote->can_update_info_refs = 0;
806 }
807 }
808 release_request(request);
809 }
810 }
811
812 #ifdef USE_CURL_MULTI
813 static int fill_active_slot(void *unused)
814 {
815 struct transfer_request *request = request_queue_head;
816
817 if (aborted)
818 return 0;
819
820 for (request = request_queue_head; request; request = request->next) {
821 if (request->state == NEED_FETCH) {
822 start_fetch_loose(request);
823 return 1;
824 } else if (pushing && request->state == NEED_PUSH) {
825 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
826 start_put(request);
827 } else {
828 start_mkcol(request);
829 }
830 return 1;
831 }
832 }
833 return 0;
834 }
835 #endif
836
837 static void get_remote_object_list(unsigned char parent);
838
839 static void add_fetch_request(struct object *obj)
840 {
841 struct transfer_request *request;
842
843 check_locks();
844
845 /*
846 * Don't fetch the object if it's known to exist locally
847 * or is already in the request queue
848 */
849 if (remote_dir_exists[obj->sha1[0]] == -1)
850 get_remote_object_list(obj->sha1[0]);
851 if (obj->flags & (LOCAL | FETCHING))
852 return;
853
854 obj->flags |= FETCHING;
855 request = xmalloc(sizeof(*request));
856 request->obj = obj;
857 request->url = NULL;
858 request->lock = NULL;
859 request->headers = NULL;
860 request->local_fileno = -1;
861 request->local_stream = NULL;
862 request->state = NEED_FETCH;
863 request->next = request_queue_head;
864 request_queue_head = request;
865
866 #ifdef USE_CURL_MULTI
867 fill_active_slots();
868 step_active_slots();
869 #endif
870 }
871
872 static int add_send_request(struct object *obj, struct remote_lock *lock)
873 {
874 struct transfer_request *request = request_queue_head;
875 struct packed_git *target;
876
877 /* Keep locks active */
878 check_locks();
879
880 /*
881 * Don't push the object if it's known to exist on the remote
882 * or is already in the request queue
883 */
884 if (remote_dir_exists[obj->sha1[0]] == -1)
885 get_remote_object_list(obj->sha1[0]);
886 if (obj->flags & (REMOTE | PUSHING))
887 return 0;
888 target = find_sha1_pack(obj->sha1, remote->packs);
889 if (target) {
890 obj->flags |= REMOTE;
891 return 0;
892 }
893
894 obj->flags |= PUSHING;
895 request = xmalloc(sizeof(*request));
896 request->obj = obj;
897 request->url = NULL;
898 request->lock = lock;
899 request->headers = NULL;
900 request->local_fileno = -1;
901 request->local_stream = NULL;
902 request->state = NEED_PUSH;
903 request->next = request_queue_head;
904 request_queue_head = request;
905
906 #ifdef USE_CURL_MULTI
907 fill_active_slots();
908 step_active_slots();
909 #endif
910
911 return 1;
912 }
913
914 static int fetch_index(unsigned char *sha1)
915 {
916 char *hex = sha1_to_hex(sha1);
917 char *filename;
918 char *url;
919 char tmpfile[PATH_MAX];
920 long prev_posn = 0;
921 char range[RANGE_HEADER_SIZE];
922 struct curl_slist *range_header = NULL;
923
924 FILE *indexfile;
925 struct active_request_slot *slot;
926 struct slot_results results;
927
928 /* Don't use the index if the pack isn't there */
929 url = xmalloc(strlen(remote->url) + 64);
930 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
931 slot = get_active_slot();
932 slot->results = &results;
933 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
934 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
935 if (start_active_slot(slot)) {
936 run_active_slot(slot);
937 if (results.curl_result != CURLE_OK) {
938 free(url);
939 return error("Unable to verify pack %s is available",
940 hex);
941 }
942 } else {
943 free(url);
944 return error("Unable to start request");
945 }
946
947 if (has_pack_index(sha1)) {
948 free(url);
949 return 0;
950 }
951
952 if (push_verbosely)
953 fprintf(stderr, "Getting index for pack %s\n", hex);
954
955 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
956
957 filename = sha1_pack_index_name(sha1);
958 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
959 indexfile = fopen(tmpfile, "a");
960 if (!indexfile) {
961 free(url);
962 return error("Unable to open local file %s for pack index",
963 tmpfile);
964 }
965
966 slot = get_active_slot();
967 slot->results = &results;
968 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
969 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
970 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
971 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
972 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
973 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
974 slot->local = indexfile;
975
976 /* If there is data present from a previous transfer attempt,
977 resume where it left off */
978 prev_posn = ftell(indexfile);
979 if (prev_posn>0) {
980 if (push_verbosely)
981 fprintf(stderr,
982 "Resuming fetch of index for pack %s at byte %ld\n",
983 hex, prev_posn);
984 sprintf(range, "Range: bytes=%ld-", prev_posn);
985 range_header = curl_slist_append(range_header, range);
986 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
987 }
988
989 if (start_active_slot(slot)) {
990 run_active_slot(slot);
991 if (results.curl_result != CURLE_OK) {
992 free(url);
993 fclose(indexfile);
994 return error("Unable to get pack index %s\n%s", url,
995 curl_errorstr);
996 }
997 } else {
998 free(url);
999 fclose(indexfile);
1000 return error("Unable to start request");
1001 }
1002
1003 free(url);
1004 fclose(indexfile);
1005
1006 return move_temp_to_file(tmpfile, filename);
1007 }
1008
1009 static int setup_index(unsigned char *sha1)
1010 {
1011 struct packed_git *new_pack;
1012
1013 if (fetch_index(sha1))
1014 return -1;
1015
1016 new_pack = parse_pack_index(sha1);
1017 new_pack->next = remote->packs;
1018 remote->packs = new_pack;
1019 return 0;
1020 }
1021
1022 static int fetch_indices(void)
1023 {
1024 unsigned char sha1[20];
1025 char *url;
1026 struct strbuf buffer = STRBUF_INIT;
1027 char *data;
1028 int i = 0;
1029
1030 struct active_request_slot *slot;
1031 struct slot_results results;
1032
1033 if (push_verbosely)
1034 fprintf(stderr, "Getting pack list\n");
1035
1036 url = xmalloc(strlen(remote->url) + 20);
1037 sprintf(url, "%sobjects/info/packs", remote->url);
1038
1039 slot = get_active_slot();
1040 slot->results = &results;
1041 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1042 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1043 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1044 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1045 if (start_active_slot(slot)) {
1046 run_active_slot(slot);
1047 if (results.curl_result != CURLE_OK) {
1048 strbuf_release(&buffer);
1049 free(url);
1050 if (results.http_code == 404)
1051 return 0;
1052 else
1053 return error("%s", curl_errorstr);
1054 }
1055 } else {
1056 strbuf_release(&buffer);
1057 free(url);
1058 return error("Unable to start request");
1059 }
1060 free(url);
1061
1062 data = buffer.buf;
1063 while (i < buffer.len) {
1064 switch (data[i]) {
1065 case 'P':
1066 i++;
1067 if (i + 52 < buffer.len &&
1068 !prefixcmp(data + i, " pack-") &&
1069 !prefixcmp(data + i + 46, ".pack\n")) {
1070 get_sha1_hex(data + i + 6, sha1);
1071 setup_index(sha1);
1072 i += 51;
1073 break;
1074 }
1075 default:
1076 while (data[i] != '\n')
1077 i++;
1078 }
1079 i++;
1080 }
1081
1082 strbuf_release(&buffer);
1083 return 0;
1084 }
1085
1086 static void one_remote_object(const char *hex)
1087 {
1088 unsigned char sha1[20];
1089 struct object *obj;
1090
1091 if (get_sha1_hex(hex, sha1) != 0)
1092 return;
1093
1094 obj = lookup_object(sha1);
1095 if (!obj)
1096 obj = parse_object(sha1);
1097
1098 /* Ignore remote objects that don't exist locally */
1099 if (!obj)
1100 return;
1101
1102 obj->flags |= REMOTE;
1103 if (!object_list_contains(objects, obj))
1104 object_list_insert(obj, &objects);
1105 }
1106
1107 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1108 {
1109 int *lock_flags = (int *)ctx->userData;
1110
1111 if (tag_closed) {
1112 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1113 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1114 (*lock_flags & DAV_PROP_LOCKWR)) {
1115 *lock_flags |= DAV_LOCK_OK;
1116 }
1117 *lock_flags &= DAV_LOCK_OK;
1118 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1119 *lock_flags |= DAV_PROP_LOCKWR;
1120 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1121 *lock_flags |= DAV_PROP_LOCKEX;
1122 }
1123 }
1124 }
1125
1126 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1127 {
1128 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1129
1130 if (tag_closed && ctx->cdata) {
1131 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1132 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1133 strcpy(lock->owner, ctx->cdata);
1134 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1135 if (!prefixcmp(ctx->cdata, "Second-"))
1136 lock->timeout =
1137 strtol(ctx->cdata + 7, NULL, 10);
1138 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1139 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1140 strcpy(lock->token, ctx->cdata);
1141 }
1142 }
1143 }
1144
1145 static void one_remote_ref(char *refname);
1146
1147 static void
1148 xml_start_tag(void *userData, const char *name, const char **atts)
1149 {
1150 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1151 const char *c = strchr(name, ':');
1152 int new_len;
1153
1154 if (c == NULL)
1155 c = name;
1156 else
1157 c++;
1158
1159 new_len = strlen(ctx->name) + strlen(c) + 2;
1160
1161 if (new_len > ctx->len) {
1162 ctx->name = xrealloc(ctx->name, new_len);
1163 ctx->len = new_len;
1164 }
1165 strcat(ctx->name, ".");
1166 strcat(ctx->name, c);
1167
1168 free(ctx->cdata);
1169 ctx->cdata = NULL;
1170
1171 ctx->userFunc(ctx, 0);
1172 }
1173
1174 static void
1175 xml_end_tag(void *userData, const char *name)
1176 {
1177 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1178 const char *c = strchr(name, ':');
1179 char *ep;
1180
1181 ctx->userFunc(ctx, 1);
1182
1183 if (c == NULL)
1184 c = name;
1185 else
1186 c++;
1187
1188 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1189 *ep = 0;
1190 }
1191
1192 static void
1193 xml_cdata(void *userData, const XML_Char *s, int len)
1194 {
1195 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1196 free(ctx->cdata);
1197 ctx->cdata = xmemdupz(s, len);
1198 }
1199
1200 static struct remote_lock *lock_remote(const char *path, long timeout)
1201 {
1202 struct active_request_slot *slot;
1203 struct slot_results results;
1204 struct buffer out_buffer = { STRBUF_INIT, 0 };
1205 struct strbuf in_buffer = STRBUF_INIT;
1206 char *url;
1207 char *ep;
1208 char timeout_header[25];
1209 struct remote_lock *lock = NULL;
1210 struct curl_slist *dav_headers = NULL;
1211 struct xml_ctx ctx;
1212
1213 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1214 sprintf(url, "%s%s", remote->url, path);
1215
1216 /* Make sure leading directories exist for the remote ref */
1217 ep = strchr(url + strlen(remote->url) + 1, '/');
1218 while (ep) {
1219 char saved_character = ep[1];
1220 ep[1] = '\0';
1221 slot = get_active_slot();
1222 slot->results = &results;
1223 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1224 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1225 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1226 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1227 if (start_active_slot(slot)) {
1228 run_active_slot(slot);
1229 if (results.curl_result != CURLE_OK &&
1230 results.http_code != 405) {
1231 fprintf(stderr,
1232 "Unable to create branch path %s\n",
1233 url);
1234 free(url);
1235 return NULL;
1236 }
1237 } else {
1238 fprintf(stderr, "Unable to start MKCOL request\n");
1239 free(url);
1240 return NULL;
1241 }
1242 ep[1] = saved_character;
1243 ep = strchr(ep + 1, '/');
1244 }
1245
1246 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1247
1248 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1249 dav_headers = curl_slist_append(dav_headers, timeout_header);
1250 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1251
1252 slot = get_active_slot();
1253 slot->results = &results;
1254 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1255 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1256 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1257 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1258 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1259 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1260 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1261 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1262 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1263
1264 lock = xcalloc(1, sizeof(*lock));
1265 lock->timeout = -1;
1266
1267 if (start_active_slot(slot)) {
1268 run_active_slot(slot);
1269 if (results.curl_result == CURLE_OK) {
1270 XML_Parser parser = XML_ParserCreate(NULL);
1271 enum XML_Status result;
1272 ctx.name = xcalloc(10, 1);
1273 ctx.len = 0;
1274 ctx.cdata = NULL;
1275 ctx.userFunc = handle_new_lock_ctx;
1276 ctx.userData = lock;
1277 XML_SetUserData(parser, &ctx);
1278 XML_SetElementHandler(parser, xml_start_tag,
1279 xml_end_tag);
1280 XML_SetCharacterDataHandler(parser, xml_cdata);
1281 result = XML_Parse(parser, in_buffer.buf,
1282 in_buffer.len, 1);
1283 free(ctx.name);
1284 if (result != XML_STATUS_OK) {
1285 fprintf(stderr, "XML error: %s\n",
1286 XML_ErrorString(
1287 XML_GetErrorCode(parser)));
1288 lock->timeout = -1;
1289 }
1290 XML_ParserFree(parser);
1291 }
1292 } else {
1293 fprintf(stderr, "Unable to start LOCK request\n");
1294 }
1295
1296 curl_slist_free_all(dav_headers);
1297 strbuf_release(&out_buffer.buf);
1298 strbuf_release(&in_buffer);
1299
1300 if (lock->token == NULL || lock->timeout <= 0) {
1301 free(lock->token);
1302 free(lock->owner);
1303 free(url);
1304 free(lock);
1305 lock = NULL;
1306 } else {
1307 lock->url = url;
1308 lock->start_time = time(NULL);
1309 lock->next = remote->locks;
1310 remote->locks = lock;
1311 }
1312
1313 return lock;
1314 }
1315
1316 static int unlock_remote(struct remote_lock *lock)
1317 {
1318 struct active_request_slot *slot;
1319 struct slot_results results;
1320 struct remote_lock *prev = remote->locks;
1321 struct curl_slist *dav_headers;
1322 int rc = 0;
1323
1324 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1325
1326 slot = get_active_slot();
1327 slot->results = &results;
1328 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1329 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1330 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1331 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1332
1333 if (start_active_slot(slot)) {
1334 run_active_slot(slot);
1335 if (results.curl_result == CURLE_OK)
1336 rc = 1;
1337 else
1338 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1339 results.http_code);
1340 } else {
1341 fprintf(stderr, "Unable to start UNLOCK request\n");
1342 }
1343
1344 curl_slist_free_all(dav_headers);
1345
1346 if (remote->locks == lock) {
1347 remote->locks = lock->next;
1348 } else {
1349 while (prev && prev->next != lock)
1350 prev = prev->next;
1351 if (prev)
1352 prev->next = prev->next->next;
1353 }
1354
1355 free(lock->owner);
1356 free(lock->url);
1357 free(lock->token);
1358 free(lock);
1359
1360 return rc;
1361 }
1362
1363 static void remove_locks(void)
1364 {
1365 struct remote_lock *lock = remote->locks;
1366
1367 fprintf(stderr, "Removing remote locks...\n");
1368 while (lock) {
1369 unlock_remote(lock);
1370 lock = lock->next;
1371 }
1372 }
1373
1374 static void remove_locks_on_signal(int signo)
1375 {
1376 remove_locks();
1377 signal(signo, SIG_DFL);
1378 raise(signo);
1379 }
1380
1381 static void remote_ls(const char *path, int flags,
1382 void (*userFunc)(struct remote_ls_ctx *ls),
1383 void *userData);
1384
1385 static void process_ls_object(struct remote_ls_ctx *ls)
1386 {
1387 unsigned int *parent = (unsigned int *)ls->userData;
1388 char *path = ls->dentry_name;
1389 char *obj_hex;
1390
1391 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1392 remote_dir_exists[*parent] = 1;
1393 return;
1394 }
1395
1396 if (strlen(path) != 49)
1397 return;
1398 path += 8;
1399 obj_hex = xmalloc(strlen(path));
1400 /* NB: path is not null-terminated, can not use strlcpy here */
1401 memcpy(obj_hex, path, 2);
1402 strcpy(obj_hex + 2, path + 3);
1403 one_remote_object(obj_hex);
1404 free(obj_hex);
1405 }
1406
1407 static void process_ls_ref(struct remote_ls_ctx *ls)
1408 {
1409 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1410 fprintf(stderr, " %s\n", ls->dentry_name);
1411 return;
1412 }
1413
1414 if (!(ls->dentry_flags & IS_DIR))
1415 one_remote_ref(ls->dentry_name);
1416 }
1417
1418 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1419 {
1420 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1421
1422 if (tag_closed) {
1423 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1424 if (ls->dentry_flags & IS_DIR) {
1425 if (ls->flags & PROCESS_DIRS) {
1426 ls->userFunc(ls);
1427 }
1428 if (strcmp(ls->dentry_name, ls->path) &&
1429 ls->flags & RECURSIVE) {
1430 remote_ls(ls->dentry_name,
1431 ls->flags,
1432 ls->userFunc,
1433 ls->userData);
1434 }
1435 } else if (ls->flags & PROCESS_FILES) {
1436 ls->userFunc(ls);
1437 }
1438 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1439 char *path = ctx->cdata;
1440 if (*ctx->cdata == 'h') {
1441 path = strstr(path, "//");
1442 if (path) {
1443 path = strchr(path+2, '/');
1444 }
1445 }
1446 if (path) {
1447 path += remote->path_len;
1448 ls->dentry_name = xstrdup(path);
1449 }
1450 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1451 ls->dentry_flags |= IS_DIR;
1452 }
1453 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1454 free(ls->dentry_name);
1455 ls->dentry_name = NULL;
1456 ls->dentry_flags = 0;
1457 }
1458 }
1459
1460 /*
1461 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1462 * should _only_ heed the information from that file, instead of trying to
1463 * determine the refs from the remote file system (badly: it does not even
1464 * know about packed-refs).
1465 */
1466 static void remote_ls(const char *path, int flags,
1467 void (*userFunc)(struct remote_ls_ctx *ls),
1468 void *userData)
1469 {
1470 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1471 struct active_request_slot *slot;
1472 struct slot_results results;
1473 struct strbuf in_buffer = STRBUF_INIT;
1474 struct buffer out_buffer = { STRBUF_INIT, 0 };
1475 struct curl_slist *dav_headers = NULL;
1476 struct xml_ctx ctx;
1477 struct remote_ls_ctx ls;
1478
1479 ls.flags = flags;
1480 ls.path = xstrdup(path);
1481 ls.dentry_name = NULL;
1482 ls.dentry_flags = 0;
1483 ls.userData = userData;
1484 ls.userFunc = userFunc;
1485
1486 sprintf(url, "%s%s", remote->url, path);
1487
1488 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1489
1490 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1491 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1492
1493 slot = get_active_slot();
1494 slot->results = &results;
1495 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1496 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1497 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1498 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1499 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1500 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1501 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1502 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1503 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1504
1505 if (start_active_slot(slot)) {
1506 run_active_slot(slot);
1507 if (results.curl_result == CURLE_OK) {
1508 XML_Parser parser = XML_ParserCreate(NULL);
1509 enum XML_Status result;
1510 ctx.name = xcalloc(10, 1);
1511 ctx.len = 0;
1512 ctx.cdata = NULL;
1513 ctx.userFunc = handle_remote_ls_ctx;
1514 ctx.userData = &ls;
1515 XML_SetUserData(parser, &ctx);
1516 XML_SetElementHandler(parser, xml_start_tag,
1517 xml_end_tag);
1518 XML_SetCharacterDataHandler(parser, xml_cdata);
1519 result = XML_Parse(parser, in_buffer.buf,
1520 in_buffer.len, 1);
1521 free(ctx.name);
1522
1523 if (result != XML_STATUS_OK) {
1524 fprintf(stderr, "XML error: %s\n",
1525 XML_ErrorString(
1526 XML_GetErrorCode(parser)));
1527 }
1528 XML_ParserFree(parser);
1529 }
1530 } else {
1531 fprintf(stderr, "Unable to start PROPFIND request\n");
1532 }
1533
1534 free(ls.path);
1535 free(url);
1536 strbuf_release(&out_buffer.buf);
1537 strbuf_release(&in_buffer);
1538 curl_slist_free_all(dav_headers);
1539 }
1540
1541 static void get_remote_object_list(unsigned char parent)
1542 {
1543 char path[] = "objects/XX/";
1544 static const char hex[] = "0123456789abcdef";
1545 unsigned int val = parent;
1546
1547 path[8] = hex[val >> 4];
1548 path[9] = hex[val & 0xf];
1549 remote_dir_exists[val] = 0;
1550 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1551 process_ls_object, &val);
1552 }
1553
1554 static int locking_available(void)
1555 {
1556 struct active_request_slot *slot;
1557 struct slot_results results;
1558 struct strbuf in_buffer = STRBUF_INIT;
1559 struct buffer out_buffer = { STRBUF_INIT, 0 };
1560 struct curl_slist *dav_headers = NULL;
1561 struct xml_ctx ctx;
1562 int lock_flags = 0;
1563
1564 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1565
1566 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1567 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1568
1569 slot = get_active_slot();
1570 slot->results = &results;
1571 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1572 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1573 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1574 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1575 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1576 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1577 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1578 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1579 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1580
1581 if (start_active_slot(slot)) {
1582 run_active_slot(slot);
1583 if (results.curl_result == CURLE_OK) {
1584 XML_Parser parser = XML_ParserCreate(NULL);
1585 enum XML_Status result;
1586 ctx.name = xcalloc(10, 1);
1587 ctx.len = 0;
1588 ctx.cdata = NULL;
1589 ctx.userFunc = handle_lockprop_ctx;
1590 ctx.userData = &lock_flags;
1591 XML_SetUserData(parser, &ctx);
1592 XML_SetElementHandler(parser, xml_start_tag,
1593 xml_end_tag);
1594 result = XML_Parse(parser, in_buffer.buf,
1595 in_buffer.len, 1);
1596 free(ctx.name);
1597
1598 if (result != XML_STATUS_OK) {
1599 fprintf(stderr, "XML error: %s\n",
1600 XML_ErrorString(
1601 XML_GetErrorCode(parser)));
1602 lock_flags = 0;
1603 }
1604 XML_ParserFree(parser);
1605 if (!lock_flags)
1606 error("Error: no DAV locking support on %s",
1607 remote->url);
1608
1609 } else {
1610 error("Cannot access URL %s, return code %d",
1611 remote->url, results.curl_result);
1612 lock_flags = 0;
1613 }
1614 } else {
1615 error("Unable to start PROPFIND request on %s", remote->url);
1616 }
1617
1618 strbuf_release(&out_buffer.buf);
1619 strbuf_release(&in_buffer);
1620 curl_slist_free_all(dav_headers);
1621
1622 return lock_flags;
1623 }
1624
1625 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1626 {
1627 struct object_list *entry = xmalloc(sizeof(struct object_list));
1628 entry->item = obj;
1629 entry->next = *p;
1630 *p = entry;
1631 return &entry->next;
1632 }
1633
1634 static struct object_list **process_blob(struct blob *blob,
1635 struct object_list **p,
1636 struct name_path *path,
1637 const char *name)
1638 {
1639 struct object *obj = &blob->object;
1640
1641 obj->flags |= LOCAL;
1642
1643 if (obj->flags & (UNINTERESTING | SEEN))
1644 return p;
1645
1646 obj->flags |= SEEN;
1647 return add_one_object(obj, p);
1648 }
1649
1650 static struct object_list **process_tree(struct tree *tree,
1651 struct object_list **p,
1652 struct name_path *path,
1653 const char *name)
1654 {
1655 struct object *obj = &tree->object;
1656 struct tree_desc desc;
1657 struct name_entry entry;
1658 struct name_path me;
1659
1660 obj->flags |= LOCAL;
1661
1662 if (obj->flags & (UNINTERESTING | SEEN))
1663 return p;
1664 if (parse_tree(tree) < 0)
1665 die("bad tree object %s", sha1_to_hex(obj->sha1));
1666
1667 obj->flags |= SEEN;
1668 name = xstrdup(name);
1669 p = add_one_object(obj, p);
1670 me.up = path;
1671 me.elem = name;
1672 me.elem_len = strlen(name);
1673
1674 init_tree_desc(&desc, tree->buffer, tree->size);
1675
1676 while (tree_entry(&desc, &entry))
1677 switch (object_type(entry.mode)) {
1678 case OBJ_TREE:
1679 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1680 break;
1681 case OBJ_BLOB:
1682 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1683 break;
1684 default:
1685 /* Subproject commit - not in this repository */
1686 break;
1687 }
1688
1689 free(tree->buffer);
1690 tree->buffer = NULL;
1691 return p;
1692 }
1693
1694 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1695 {
1696 int i;
1697 struct commit *commit;
1698 struct object_list **p = &objects;
1699 int count = 0;
1700
1701 while ((commit = get_revision(revs)) != NULL) {
1702 p = process_tree(commit->tree, p, NULL, "");
1703 commit->object.flags |= LOCAL;
1704 if (!(commit->object.flags & UNINTERESTING))
1705 count += add_send_request(&commit->object, lock);
1706 }
1707
1708 for (i = 0; i < revs->pending.nr; i++) {
1709 struct object_array_entry *entry = revs->pending.objects + i;
1710 struct object *obj = entry->item;
1711 const char *name = entry->name;
1712
1713 if (obj->flags & (UNINTERESTING | SEEN))
1714 continue;
1715 if (obj->type == OBJ_TAG) {
1716 obj->flags |= SEEN;
1717 p = add_one_object(obj, p);
1718 continue;
1719 }
1720 if (obj->type == OBJ_TREE) {
1721 p = process_tree((struct tree *)obj, p, NULL, name);
1722 continue;
1723 }
1724 if (obj->type == OBJ_BLOB) {
1725 p = process_blob((struct blob *)obj, p, NULL, name);
1726 continue;
1727 }
1728 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1729 }
1730
1731 while (objects) {
1732 if (!(objects->item->flags & UNINTERESTING))
1733 count += add_send_request(objects->item, lock);
1734 objects = objects->next;
1735 }
1736
1737 return count;
1738 }
1739
1740 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1741 {
1742 struct active_request_slot *slot;
1743 struct slot_results results;
1744 struct buffer out_buffer = { STRBUF_INIT, 0 };
1745 struct curl_slist *dav_headers;
1746
1747 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1748
1749 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1750
1751 slot = get_active_slot();
1752 slot->results = &results;
1753 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1754 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1755 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1756 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1757 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1758 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1759 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1760 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1761 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1762
1763 if (start_active_slot(slot)) {
1764 run_active_slot(slot);
1765 strbuf_release(&out_buffer.buf);
1766 if (results.curl_result != CURLE_OK) {
1767 fprintf(stderr,
1768 "PUT error: curl result=%d, HTTP code=%ld\n",
1769 results.curl_result, results.http_code);
1770 /* We should attempt recovery? */
1771 return 0;
1772 }
1773 } else {
1774 strbuf_release(&out_buffer.buf);
1775 fprintf(stderr, "Unable to start PUT request\n");
1776 return 0;
1777 }
1778
1779 return 1;
1780 }
1781
1782 static struct ref *local_refs, **local_tail;
1783 static struct ref *remote_refs, **remote_tail;
1784
1785 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1786 {
1787 struct ref *ref;
1788 int len = strlen(refname) + 1;
1789 ref = xcalloc(1, sizeof(*ref) + len);
1790 hashcpy(ref->new_sha1, sha1);
1791 memcpy(ref->name, refname, len);
1792 *local_tail = ref;
1793 local_tail = &ref->next;
1794 return 0;
1795 }
1796
1797 static void one_remote_ref(char *refname)
1798 {
1799 struct ref *ref;
1800 struct object *obj;
1801
1802 ref = alloc_ref(refname);
1803
1804 if (http_fetch_ref(remote->url, ref) != 0) {
1805 fprintf(stderr,
1806 "Unable to fetch ref %s from %s\n",
1807 refname, remote->url);
1808 free(ref);
1809 return;
1810 }
1811
1812 /*
1813 * Fetch a copy of the object if it doesn't exist locally - it
1814 * may be required for updating server info later.
1815 */
1816 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1817 obj = lookup_unknown_object(ref->old_sha1);
1818 if (obj) {
1819 fprintf(stderr, " fetch %s for %s\n",
1820 sha1_to_hex(ref->old_sha1), refname);
1821 add_fetch_request(obj);
1822 }
1823 }
1824
1825 *remote_tail = ref;
1826 remote_tail = &ref->next;
1827 }
1828
1829 static void get_local_heads(void)
1830 {
1831 local_tail = &local_refs;
1832 for_each_ref(one_local_ref, NULL);
1833 }
1834
1835 static void get_dav_remote_heads(void)
1836 {
1837 remote_tail = &remote_refs;
1838 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1839 }
1840
1841 static int is_zero_sha1(const unsigned char *sha1)
1842 {
1843 int i;
1844
1845 for (i = 0; i < 20; i++) {
1846 if (*sha1++)
1847 return 0;
1848 }
1849 return 1;
1850 }
1851
1852 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1853 {
1854 while (list) {
1855 struct commit_list *temp = list;
1856 temp->item->object.flags &= ~mark;
1857 list = temp->next;
1858 free(temp);
1859 }
1860 }
1861
1862 static int ref_newer(const unsigned char *new_sha1,
1863 const unsigned char *old_sha1)
1864 {
1865 struct object *o;
1866 struct commit *old, *new;
1867 struct commit_list *list, *used;
1868 int found = 0;
1869
1870 /* Both new and old must be commit-ish and new is descendant of
1871 * old. Otherwise we require --force.
1872 */
1873 o = deref_tag(parse_object(old_sha1), NULL, 0);
1874 if (!o || o->type != OBJ_COMMIT)
1875 return 0;
1876 old = (struct commit *) o;
1877
1878 o = deref_tag(parse_object(new_sha1), NULL, 0);
1879 if (!o || o->type != OBJ_COMMIT)
1880 return 0;
1881 new = (struct commit *) o;
1882
1883 if (parse_commit(new) < 0)
1884 return 0;
1885
1886 used = list = NULL;
1887 commit_list_insert(new, &list);
1888 while (list) {
1889 new = pop_most_recent_commit(&list, TMP_MARK);
1890 commit_list_insert(new, &used);
1891 if (new == old) {
1892 found = 1;
1893 break;
1894 }
1895 }
1896 unmark_and_free(list, TMP_MARK);
1897 unmark_and_free(used, TMP_MARK);
1898 return found;
1899 }
1900
1901 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1902 {
1903 struct strbuf *buf = (struct strbuf *)ls->userData;
1904 struct object *o;
1905 int len;
1906 char *ref_info;
1907 struct ref *ref;
1908
1909 ref = alloc_ref(ls->dentry_name);
1910
1911 if (http_fetch_ref(remote->url, ref) != 0) {
1912 fprintf(stderr,
1913 "Unable to fetch ref %s from %s\n",
1914 ls->dentry_name, remote->url);
1915 aborted = 1;
1916 free(ref);
1917 return;
1918 }
1919
1920 o = parse_object(ref->old_sha1);
1921 if (!o) {
1922 fprintf(stderr,
1923 "Unable to parse object %s for remote ref %s\n",
1924 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1925 aborted = 1;
1926 free(ref);
1927 return;
1928 }
1929
1930 len = strlen(ls->dentry_name) + 42;
1931 ref_info = xcalloc(len + 1, 1);
1932 sprintf(ref_info, "%s %s\n",
1933 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1934 fwrite_buffer(ref_info, 1, len, buf);
1935 free(ref_info);
1936
1937 if (o->type == OBJ_TAG) {
1938 o = deref_tag(o, ls->dentry_name, 0);
1939 if (o) {
1940 len = strlen(ls->dentry_name) + 45;
1941 ref_info = xcalloc(len + 1, 1);
1942 sprintf(ref_info, "%s %s^{}\n",
1943 sha1_to_hex(o->sha1), ls->dentry_name);
1944 fwrite_buffer(ref_info, 1, len, buf);
1945 free(ref_info);
1946 }
1947 }
1948 free(ref);
1949 }
1950
1951 static void update_remote_info_refs(struct remote_lock *lock)
1952 {
1953 struct buffer buffer = { STRBUF_INIT, 0 };
1954 struct active_request_slot *slot;
1955 struct slot_results results;
1956 struct curl_slist *dav_headers;
1957
1958 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1959 add_remote_info_ref, &buffer.buf);
1960 if (!aborted) {
1961 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1962
1963 slot = get_active_slot();
1964 slot->results = &results;
1965 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1966 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1967 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1968 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1969 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1970 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1971 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1972 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1973 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1974
1975 if (start_active_slot(slot)) {
1976 run_active_slot(slot);
1977 if (results.curl_result != CURLE_OK) {
1978 fprintf(stderr,
1979 "PUT error: curl result=%d, HTTP code=%ld\n",
1980 results.curl_result, results.http_code);
1981 }
1982 }
1983 }
1984 strbuf_release(&buffer.buf);
1985 }
1986
1987 static int remote_exists(const char *path)
1988 {
1989 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1990 struct active_request_slot *slot;
1991 struct slot_results results;
1992 int ret = -1;
1993
1994 sprintf(url, "%s%s", remote->url, path);
1995
1996 slot = get_active_slot();
1997 slot->results = &results;
1998 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1999 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2000
2001 if (start_active_slot(slot)) {
2002 run_active_slot(slot);
2003 if (results.http_code == 404)
2004 ret = 0;
2005 else if (results.curl_result == CURLE_OK)
2006 ret = 1;
2007 else
2008 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2009 } else {
2010 fprintf(stderr, "Unable to start HEAD request\n");
2011 }
2012
2013 free(url);
2014 return ret;
2015 }
2016
2017 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2018 {
2019 char *url;
2020 struct strbuf buffer = STRBUF_INIT;
2021 struct active_request_slot *slot;
2022 struct slot_results results;
2023
2024 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2025 sprintf(url, "%s%s", remote->url, path);
2026
2027 slot = get_active_slot();
2028 slot->results = &results;
2029 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2030 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2031 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2032 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2033 if (start_active_slot(slot)) {
2034 run_active_slot(slot);
2035 if (results.curl_result != CURLE_OK) {
2036 die("Couldn't get %s for remote symref\n%s",
2037 url, curl_errorstr);
2038 }
2039 } else {
2040 die("Unable to start remote symref request");
2041 }
2042 free(url);
2043
2044 free(*symref);
2045 *symref = NULL;
2046 hashclr(sha1);
2047
2048 if (buffer.len == 0)
2049 return;
2050
2051 /* If it's a symref, set the refname; otherwise try for a sha1 */
2052 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2053 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2054 } else {
2055 get_sha1_hex(buffer.buf, sha1);
2056 }
2057
2058 strbuf_release(&buffer);
2059 }
2060
2061 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2062 {
2063 struct commit *head = lookup_commit(head_sha1);
2064 struct commit *branch = lookup_commit(branch_sha1);
2065 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2066
2067 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2068 }
2069
2070 static int delete_remote_branch(char *pattern, int force)
2071 {
2072 struct ref *refs = remote_refs;
2073 struct ref *remote_ref = NULL;
2074 unsigned char head_sha1[20];
2075 char *symref = NULL;
2076 int match;
2077 int patlen = strlen(pattern);
2078 int i;
2079 struct active_request_slot *slot;
2080 struct slot_results results;
2081 char *url;
2082
2083 /* Find the remote branch(es) matching the specified branch name */
2084 for (match = 0; refs; refs = refs->next) {
2085 char *name = refs->name;
2086 int namelen = strlen(name);
2087 if (namelen < patlen ||
2088 memcmp(name + namelen - patlen, pattern, patlen))
2089 continue;
2090 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2091 continue;
2092 match++;
2093 remote_ref = refs;
2094 }
2095 if (match == 0)
2096 return error("No remote branch matches %s", pattern);
2097 if (match != 1)
2098 return error("More than one remote branch matches %s",
2099 pattern);
2100
2101 /*
2102 * Remote HEAD must be a symref (not exactly foolproof; a remote
2103 * symlink to a symref will look like a symref)
2104 */
2105 fetch_symref("HEAD", &symref, head_sha1);
2106 if (!symref)
2107 return error("Remote HEAD is not a symref");
2108
2109 /* Remote branch must not be the remote HEAD */
2110 for (i=0; symref && i<MAXDEPTH; i++) {
2111 if (!strcmp(remote_ref->name, symref))
2112 return error("Remote branch %s is the current HEAD",
2113 remote_ref->name);
2114 fetch_symref(symref, &symref, head_sha1);
2115 }
2116
2117 /* Run extra sanity checks if delete is not forced */
2118 if (!force) {
2119 /* Remote HEAD must resolve to a known object */
2120 if (symref)
2121 return error("Remote HEAD symrefs too deep");
2122 if (is_zero_sha1(head_sha1))
2123 return error("Unable to resolve remote HEAD");
2124 if (!has_sha1_file(head_sha1))
2125 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2126
2127 /* Remote branch must resolve to a known object */
2128 if (is_zero_sha1(remote_ref->old_sha1))
2129 return error("Unable to resolve remote branch %s",
2130 remote_ref->name);
2131 if (!has_sha1_file(remote_ref->old_sha1))
2132 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));
2133
2134 /* Remote branch must be an ancestor of remote HEAD */
2135 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2136 return error("The branch '%s' is not an ancestor "
2137 "of your current HEAD.\n"
2138 "If you are sure you want to delete it,"
2139 " run:\n\t'git http-push -D %s %s'",
2140 remote_ref->name, remote->url, pattern);
2141 }
2142 }
2143
2144 /* Send delete request */
2145 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2146 if (dry_run)
2147 return 0;
2148 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2149 sprintf(url, "%s%s", remote->url, remote_ref->name);
2150 slot = get_active_slot();
2151 slot->results = &results;
2152 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2153 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2154 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2155 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2156 if (start_active_slot(slot)) {
2157 run_active_slot(slot);
2158 free(url);
2159 if (results.curl_result != CURLE_OK)
2160 return error("DELETE request failed (%d/%ld)\n",
2161 results.curl_result, results.http_code);
2162 } else {
2163 free(url);
2164 return error("Unable to start DELETE request");
2165 }
2166
2167 return 0;
2168 }
2169
2170 int main(int argc, char **argv)
2171 {
2172 struct transfer_request *request;
2173 struct transfer_request *next_request;
2174 int nr_refspec = 0;
2175 char **refspec = NULL;
2176 struct remote_lock *ref_lock = NULL;
2177 struct remote_lock *info_ref_lock = NULL;
2178 struct rev_info revs;
2179 int delete_branch = 0;
2180 int force_delete = 0;
2181 int objects_to_send;
2182 int rc = 0;
2183 int i;
2184 int new_refs;
2185 struct ref *ref;
2186 char *rewritten_url = NULL;
2187
2188 setup_git_directory();
2189
2190 remote = xcalloc(sizeof(*remote), 1);
2191
2192 argv++;
2193 for (i = 1; i < argc; i++, argv++) {
2194 char *arg = *argv;
2195
2196 if (*arg == '-') {
2197 if (!strcmp(arg, "--all")) {
2198 push_all = MATCH_REFS_ALL;
2199 continue;
2200 }
2201 if (!strcmp(arg, "--force")) {
2202 force_all = 1;
2203 continue;
2204 }
2205 if (!strcmp(arg, "--dry-run")) {
2206 dry_run = 1;
2207 continue;
2208 }
2209 if (!strcmp(arg, "--verbose")) {
2210 push_verbosely = 1;
2211 continue;
2212 }
2213 if (!strcmp(arg, "-d")) {
2214 delete_branch = 1;
2215 continue;
2216 }
2217 if (!strcmp(arg, "-D")) {
2218 delete_branch = 1;
2219 force_delete = 1;
2220 continue;
2221 }
2222 }
2223 if (!remote->url) {
2224 char *path = strstr(arg, "//");
2225 remote->url = arg;
2226 remote->path_len = strlen(arg);
2227 if (path) {
2228 remote->path = strchr(path+2, '/');
2229 if (remote->path)
2230 remote->path_len = strlen(remote->path);
2231 }
2232 continue;
2233 }
2234 refspec = argv;
2235 nr_refspec = argc - i;
2236 break;
2237 }
2238
2239 #ifndef USE_CURL_MULTI
2240 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2241 #endif
2242
2243 if (!remote->url)
2244 usage(http_push_usage);
2245
2246 if (delete_branch && nr_refspec != 1)
2247 die("You must specify only one branch name when deleting a remote branch");
2248
2249 memset(remote_dir_exists, -1, 256);
2250
2251 http_init(NULL);
2252
2253 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2254
2255 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2256 rewritten_url = xmalloc(strlen(remote->url)+2);
2257 strcpy(rewritten_url, remote->url);
2258 strcat(rewritten_url, "/");
2259 remote->path = rewritten_url + (remote->path - remote->url);
2260 remote->path_len++;
2261 remote->url = rewritten_url;
2262 }
2263
2264 /* Verify DAV compliance/lock support */
2265 if (!locking_available()) {
2266 rc = 1;
2267 goto cleanup;
2268 }
2269
2270 signal(SIGINT, remove_locks_on_signal);
2271 signal(SIGHUP, remove_locks_on_signal);
2272 signal(SIGQUIT, remove_locks_on_signal);
2273 signal(SIGTERM, remove_locks_on_signal);
2274
2275 /* Check whether the remote has server info files */
2276 remote->can_update_info_refs = 0;
2277 remote->has_info_refs = remote_exists("info/refs");
2278 remote->has_info_packs = remote_exists("objects/info/packs");
2279 if (remote->has_info_refs) {
2280 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2281 if (info_ref_lock)
2282 remote->can_update_info_refs = 1;
2283 else {
2284 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2285 rc = 1;
2286 goto cleanup;
2287 }
2288 }
2289 if (remote->has_info_packs)
2290 fetch_indices();
2291
2292 /* Get a list of all local and remote heads to validate refspecs */
2293 get_local_heads();
2294 fprintf(stderr, "Fetching remote heads...\n");
2295 get_dav_remote_heads();
2296
2297 /* Remove a remote branch if -d or -D was specified */
2298 if (delete_branch) {
2299 if (delete_remote_branch(refspec[0], force_delete) == -1)
2300 fprintf(stderr, "Unable to delete remote branch %s\n",
2301 refspec[0]);
2302 goto cleanup;
2303 }
2304
2305 /* match them up */
2306 if (!remote_tail)
2307 remote_tail = &remote_refs;
2308 if (match_refs(local_refs, remote_refs, &remote_tail,
2309 nr_refspec, (const char **) refspec, push_all)) {
2310 rc = -1;
2311 goto cleanup;
2312 }
2313 if (!remote_refs) {
2314 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2315 rc = 0;
2316 goto cleanup;
2317 }
2318
2319 new_refs = 0;
2320 for (ref = remote_refs; ref; ref = ref->next) {
2321 char old_hex[60], *new_hex;
2322 const char *commit_argv[4];
2323 int commit_argc;
2324 char *new_sha1_hex, *old_sha1_hex;
2325
2326 if (!ref->peer_ref)
2327 continue;
2328
2329 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2330 if (delete_remote_branch(ref->name, 1) == -1) {
2331 error("Could not remove %s", ref->name);
2332 rc = -4;
2333 }
2334 new_refs++;
2335 continue;
2336 }
2337
2338 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2339 if (push_verbosely || 1)
2340 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2341 continue;
2342 }
2343
2344 if (!force_all &&
2345 !is_zero_sha1(ref->old_sha1) &&
2346 !ref->force) {
2347 if (!has_sha1_file(ref->old_sha1) ||
2348 !ref_newer(ref->peer_ref->new_sha1,
2349 ref->old_sha1)) {
2350 /*
2351 * We do not have the remote ref, or
2352 * we know that the remote ref is not
2353 * an ancestor of what we are trying to
2354 * push. Either way this can be losing
2355 * commits at the remote end and likely
2356 * we were not up to date to begin with.
2357 */
2358 error("remote '%s' is not an ancestor of\n"
2359 "local '%s'.\n"
2360 "Maybe you are not up-to-date and "
2361 "need to pull first?",
2362 ref->name,
2363 ref->peer_ref->name);
2364 rc = -2;
2365 continue;
2366 }
2367 }
2368 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2369 new_refs++;
2370 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2371 new_hex = sha1_to_hex(ref->new_sha1);
2372
2373 fprintf(stderr, "updating '%s'", ref->name);
2374 if (strcmp(ref->name, ref->peer_ref->name))
2375 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2376 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2377 if (dry_run)
2378 continue;
2379
2380 /* Lock remote branch ref */
2381 ref_lock = lock_remote(ref->name, LOCK_TIME);
2382 if (ref_lock == NULL) {
2383 fprintf(stderr, "Unable to lock remote branch %s\n",
2384 ref->name);
2385 rc = 1;
2386 continue;
2387 }
2388
2389 /* Set up revision info for this refspec */
2390 commit_argc = 3;
2391 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2392 old_sha1_hex = NULL;
2393 commit_argv[1] = "--objects";
2394 commit_argv[2] = new_sha1_hex;
2395 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2396 old_sha1_hex = xmalloc(42);
2397 sprintf(old_sha1_hex, "^%s",
2398 sha1_to_hex(ref->old_sha1));
2399 commit_argv[3] = old_sha1_hex;
2400 commit_argc++;
2401 }
2402 init_revisions(&revs, setup_git_directory());
2403 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2404 revs.edge_hint = 0; /* just in case */
2405 free(new_sha1_hex);
2406 if (old_sha1_hex) {
2407 free(old_sha1_hex);
2408 commit_argv[1] = NULL;
2409 }
2410
2411 /* Generate a list of objects that need to be pushed */
2412 pushing = 0;
2413 if (prepare_revision_walk(&revs))
2414 die("revision walk setup failed");
2415 mark_edges_uninteresting(revs.commits, &revs, NULL);
2416 objects_to_send = get_delta(&revs, ref_lock);
2417 finish_all_active_slots();
2418
2419 /* Push missing objects to remote, this would be a
2420 convenient time to pack them first if appropriate. */
2421 pushing = 1;
2422 if (objects_to_send)
2423 fprintf(stderr, " sending %d objects\n",
2424 objects_to_send);
2425 #ifdef USE_CURL_MULTI
2426 fill_active_slots();
2427 add_fill_function(NULL, fill_active_slot);
2428 #endif
2429 do {
2430 finish_all_active_slots();
2431 #ifdef USE_CURL_MULTI
2432 fill_active_slots();
2433 #endif
2434 } while (request_queue_head && !aborted);
2435
2436 /* Update the remote branch if all went well */
2437 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2438 rc = 1;
2439
2440 if (!rc)
2441 fprintf(stderr, " done\n");
2442 unlock_remote(ref_lock);
2443 check_locks();
2444 }
2445
2446 /* Update remote server info if appropriate */
2447 if (remote->has_info_refs && new_refs) {
2448 if (info_ref_lock && remote->can_update_info_refs) {
2449 fprintf(stderr, "Updating remote server info\n");
2450 if (!dry_run)
2451 update_remote_info_refs(info_ref_lock);
2452 } else {
2453 fprintf(stderr, "Unable to update server info\n");
2454 }
2455 }
2456
2457 cleanup:
2458 free(rewritten_url);
2459 if (info_ref_lock)
2460 unlock_remote(info_ref_lock);
2461 free(remote);
2462
2463 curl_slist_free_all(no_pragma_header);
2464
2465 http_cleanup();
2466
2467 request = request_queue_head;
2468 while (request != NULL) {
2469 next_request = request->next;
2470 release_request(request);
2471 request = next_request;
2472 }
2473
2474 return rc;
2475 }
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