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http*: copy string returned by sha1_to_hex
[alt-git.git] / http-push.c
blob82018009f3fd52ac207aa0da29376c7dde80e798
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 #include "sigchain.h"
14
15 #include <expat.h>
16
17 static const char http_push_usage[] =
18 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
19
20 #ifndef XML_STATUS_OK
21 enum XML_Status {
22 XML_STATUS_OK = 1,
23 XML_STATUS_ERROR = 0
24 };
25 #define XML_STATUS_OK 1
26 #define XML_STATUS_ERROR 0
27 #endif
28
29 #define PREV_BUF_SIZE 4096
30 #define RANGE_HEADER_SIZE 30
31
32 /* DAV methods */
33 #define DAV_LOCK "LOCK"
34 #define DAV_MKCOL "MKCOL"
35 #define DAV_MOVE "MOVE"
36 #define DAV_PROPFIND "PROPFIND"
37 #define DAV_PUT "PUT"
38 #define DAV_UNLOCK "UNLOCK"
39 #define DAV_DELETE "DELETE"
40
41 /* DAV lock flags */
42 #define DAV_PROP_LOCKWR (1u << 0)
43 #define DAV_PROP_LOCKEX (1u << 1)
44 #define DAV_LOCK_OK (1u << 2)
45
46 /* DAV XML properties */
47 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
48 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
49 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
50 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
51 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
52 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
53 #define DAV_PROPFIND_RESP ".multistatus.response"
54 #define DAV_PROPFIND_NAME ".multistatus.response.href"
55 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
56
57 /* DAV request body templates */
58 #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>"
59 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
60 #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>"
61
62 #define LOCK_TIME 600
63 #define LOCK_REFRESH 30
64
65 /* bits #0-15 in revision.h */
66
67 #define LOCAL (1u<<16)
68 #define REMOTE (1u<<17)
69 #define FETCHING (1u<<18)
70 #define PUSHING (1u<<19)
71
72 /* We allow "recursive" symbolic refs. Only within reason, though */
73 #define MAXDEPTH 5
74
75 static int pushing;
76 static int aborted;
77 static signed char remote_dir_exists[256];
78
79 static struct curl_slist *no_pragma_header;
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85
86 static struct object_list *objects;
87
88 struct repo
89 {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *repo;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE,
112 };
113
114 struct transfer_request
115 {
116 struct object *obj;
117 char *url;
118 char *dest;
119 struct remote_lock *lock;
120 struct curl_slist *headers;
121 struct buffer buffer;
122 char filename[PATH_MAX];
123 char tmpfile[PATH_MAX];
124 int local_fileno;
125 FILE *local_stream;
126 enum transfer_state state;
127 CURLcode curl_result;
128 char errorstr[CURL_ERROR_SIZE];
129 long http_code;
130 unsigned char real_sha1[20];
131 git_SHA_CTX c;
132 z_stream stream;
133 int zret;
134 int rename;
135 void *userData;
136 struct active_request_slot *slot;
137 struct transfer_request *next;
138 };
139
140 static struct transfer_request *request_queue_head;
141
142 struct xml_ctx
143 {
144 char *name;
145 int len;
146 char *cdata;
147 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
148 void *userData;
149 };
150
151 struct remote_lock
152 {
153 char *url;
154 char *owner;
155 char *token;
156 char tmpfile_suffix[41];
157 time_t start_time;
158 long timeout;
159 int refreshing;
160 struct remote_lock *next;
161 };
162
163 /* Flags that control remote_ls processing */
164 #define PROCESS_FILES (1u << 0)
165 #define PROCESS_DIRS (1u << 1)
166 #define RECURSIVE (1u << 2)
167
168 /* Flags that remote_ls passes to callback functions */
169 #define IS_DIR (1u << 0)
170
171 struct remote_ls_ctx
172 {
173 char *path;
174 void (*userFunc)(struct remote_ls_ctx *ls);
175 void *userData;
176 int flags;
177 char *dentry_name;
178 int dentry_flags;
179 struct remote_ls_ctx *parent;
180 };
181
182 /* get_dav_token_headers options */
183 enum dav_header_flag {
184 DAV_HEADER_IF = (1u << 0),
185 DAV_HEADER_LOCK = (1u << 1),
186 DAV_HEADER_TIMEOUT = (1u << 2)
187 };
188
189 static char *xml_entities(char *s)
190 {
191 struct strbuf buf = STRBUF_INIT;
192 while (*s) {
193 size_t len = strcspn(s, "\"<>&");
194 strbuf_add(&buf, s, len);
195 s += len;
196 switch (*s) {
197 case '"':
198 strbuf_addstr(&buf, "&quot;");
199 break;
200 case '<':
201 strbuf_addstr(&buf, "&lt;");
202 break;
203 case '>':
204 strbuf_addstr(&buf, "&gt;");
205 break;
206 case '&':
207 strbuf_addstr(&buf, "&amp;");
208 break;
209 }
210 s++;
211 }
212 return strbuf_detach(&buf, NULL);
213 }
214
215 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
216 {
217 struct strbuf buf = STRBUF_INIT;
218 struct curl_slist *dav_headers = NULL;
219
220 if (options & DAV_HEADER_IF) {
221 strbuf_addf(&buf, "If: (<%s>)", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_LOCK) {
226 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 if (options & DAV_HEADER_TIMEOUT) {
231 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
232 dav_headers = curl_slist_append(dav_headers, buf.buf);
233 strbuf_reset(&buf);
234 }
235 strbuf_release(&buf);
236
237 return dav_headers;
238 }
239
240 static void append_remote_object_url(struct strbuf *buf, const char *url,
241 const char *hex,
242 int only_two_digit_prefix)
243 {
244 strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
245 if (!only_two_digit_prefix)
246 strbuf_addf(buf, "%s", hex+2);
247 }
248
249 static void finish_request(struct transfer_request *request);
250 static void release_request(struct transfer_request *request);
251
252 static void process_response(void *callback_data)
253 {
254 struct transfer_request *request =
255 (struct transfer_request *)callback_data;
256
257 finish_request(request);
258 }
259
260 #ifdef USE_CURL_MULTI
261
262 static char *get_remote_object_url(const char *url, const char *hex,
263 int only_two_digit_prefix)
264 {
265 struct strbuf buf = STRBUF_INIT;
266 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
267 return strbuf_detach(&buf, NULL);
268 }
269
270 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
271 void *data)
272 {
273 unsigned char expn[4096];
274 size_t size = eltsize * nmemb;
275 int posn = 0;
276 struct transfer_request *request = (struct transfer_request *)data;
277 do {
278 ssize_t retval = xwrite(request->local_fileno,
279 (char *) ptr + posn, size - posn);
280 if (retval < 0)
281 return posn;
282 posn += retval;
283 } while (posn < size);
284
285 request->stream.avail_in = size;
286 request->stream.next_in = ptr;
287 do {
288 request->stream.next_out = expn;
289 request->stream.avail_out = sizeof(expn);
290 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
291 git_SHA1_Update(&request->c, expn,
292 sizeof(expn) - request->stream.avail_out);
293 } while (request->stream.avail_in && request->zret == Z_OK);
294 data_received++;
295 return size;
296 }
297
298 static void start_fetch_loose(struct transfer_request *request)
299 {
300 char *hex = sha1_to_hex(request->obj->sha1);
301 char *filename;
302 char prevfile[PATH_MAX];
303 char *url;
304 int prevlocal;
305 unsigned char prev_buf[PREV_BUF_SIZE];
306 ssize_t prev_read = 0;
307 long prev_posn = 0;
308 char range[RANGE_HEADER_SIZE];
309 struct curl_slist *range_header = NULL;
310 struct active_request_slot *slot;
311
312 filename = sha1_file_name(request->obj->sha1);
313 snprintf(request->filename, sizeof(request->filename), "%s", filename);
314 snprintf(request->tmpfile, sizeof(request->tmpfile),
315 "%s.temp", filename);
316
317 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
318 unlink_or_warn(prevfile);
319 rename(request->tmpfile, prevfile);
320 unlink_or_warn(request->tmpfile);
321
322 if (request->local_fileno != -1)
323 error("fd leakage in start: %d", request->local_fileno);
324 request->local_fileno = open(request->tmpfile,
325 O_WRONLY | O_CREAT | O_EXCL, 0666);
326 /*
327 * This could have failed due to the "lazy directory creation";
328 * try to mkdir the last path component.
329 */
330 if (request->local_fileno < 0 && errno == ENOENT) {
331 char *dir = strrchr(request->tmpfile, '/');
332 if (dir) {
333 *dir = 0;
334 mkdir(request->tmpfile, 0777);
335 *dir = '/';
336 }
337 request->local_fileno = open(request->tmpfile,
338 O_WRONLY | O_CREAT | O_EXCL, 0666);
339 }
340
341 if (request->local_fileno < 0) {
342 request->state = ABORTED;
343 error("Couldn't create temporary file %s for %s: %s",
344 request->tmpfile, request->filename, strerror(errno));
345 return;
346 }
347
348 memset(&request->stream, 0, sizeof(request->stream));
349
350 git_inflate_init(&request->stream);
351
352 git_SHA1_Init(&request->c);
353
354 url = get_remote_object_url(repo->url, hex, 0);
355 request->url = xstrdup(url);
356
357 /*
358 * If a previous temp file is present, process what was already
359 * fetched.
360 */
361 prevlocal = open(prevfile, O_RDONLY);
362 if (prevlocal != -1) {
363 do {
364 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
365 if (prev_read>0) {
366 if (fwrite_sha1_file(prev_buf,
367 1,
368 prev_read,
369 request) == prev_read)
370 prev_posn += prev_read;
371 else
372 prev_read = -1;
373 }
374 } while (prev_read > 0);
375 close(prevlocal);
376 }
377 unlink_or_warn(prevfile);
378
379 /*
380 * Reset inflate/SHA1 if there was an error reading the previous temp
381 * file; also rewind to the beginning of the local file.
382 */
383 if (prev_read == -1) {
384 memset(&request->stream, 0, sizeof(request->stream));
385 git_inflate_init(&request->stream);
386 git_SHA1_Init(&request->c);
387 if (prev_posn>0) {
388 prev_posn = 0;
389 lseek(request->local_fileno, 0, SEEK_SET);
390 ftruncate(request->local_fileno, 0);
391 }
392 }
393
394 slot = get_active_slot();
395 slot->callback_func = process_response;
396 slot->callback_data = request;
397 request->slot = slot;
398
399 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
400 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
401 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
402 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
403 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
404
405 /*
406 * If we have successfully processed data from a previous fetch
407 * attempt, only fetch the data we don't already have.
408 */
409 if (prev_posn>0) {
410 if (push_verbosely)
411 fprintf(stderr,
412 "Resuming fetch of object %s at byte %ld\n",
413 hex, prev_posn);
414 sprintf(range, "Range: bytes=%ld-", prev_posn);
415 range_header = curl_slist_append(range_header, range);
416 curl_easy_setopt(slot->curl,
417 CURLOPT_HTTPHEADER, range_header);
418 }
419
420 /* Try to get the request started, abort the request on error */
421 request->state = RUN_FETCH_LOOSE;
422 if (!start_active_slot(slot)) {
423 fprintf(stderr, "Unable to start GET request\n");
424 repo->can_update_info_refs = 0;
425 release_request(request);
426 }
427 }
428
429 static void start_mkcol(struct transfer_request *request)
430 {
431 char *hex = sha1_to_hex(request->obj->sha1);
432 struct active_request_slot *slot;
433
434 request->url = get_remote_object_url(repo->url, hex, 1);
435
436 slot = get_active_slot();
437 slot->callback_func = process_response;
438 slot->callback_data = request;
439 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
440 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
441 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
442 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
443 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
444
445 if (start_active_slot(slot)) {
446 request->slot = slot;
447 request->state = RUN_MKCOL;
448 } else {
449 request->state = ABORTED;
450 free(request->url);
451 request->url = NULL;
452 }
453 }
454 #endif
455
456 static void start_fetch_packed(struct transfer_request *request)
457 {
458 char *url;
459 struct packed_git *target;
460 FILE *packfile;
461 char *filename;
462 long prev_posn = 0;
463 char range[RANGE_HEADER_SIZE];
464 struct curl_slist *range_header = NULL;
465
466 struct transfer_request *check_request = request_queue_head;
467 struct active_request_slot *slot;
468
469 target = find_sha1_pack(request->obj->sha1, repo->packs);
470 if (!target) {
471 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
472 repo->can_update_info_refs = 0;
473 release_request(request);
474 return;
475 }
476
477 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
478 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
479
480 filename = sha1_pack_name(target->sha1);
481 snprintf(request->filename, sizeof(request->filename), "%s", filename);
482 snprintf(request->tmpfile, sizeof(request->tmpfile),
483 "%s.temp", filename);
484
485 url = xmalloc(strlen(repo->url) + 64);
486 sprintf(url, "%sobjects/pack/pack-%s.pack",
487 repo->url, sha1_to_hex(target->sha1));
488
489 /* Make sure there isn't another open request for this pack */
490 while (check_request) {
491 if (check_request->state == RUN_FETCH_PACKED &&
492 !strcmp(check_request->url, url)) {
493 free(url);
494 release_request(request);
495 return;
496 }
497 check_request = check_request->next;
498 }
499
500 packfile = fopen(request->tmpfile, "a");
501 if (!packfile) {
502 fprintf(stderr, "Unable to open local file %s for pack",
503 request->tmpfile);
504 repo->can_update_info_refs = 0;
505 free(url);
506 return;
507 }
508
509 slot = get_active_slot();
510 slot->callback_func = process_response;
511 slot->callback_data = request;
512 request->slot = slot;
513 request->local_stream = packfile;
514 request->userData = target;
515
516 request->url = url;
517 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
518 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
519 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
520 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
521 slot->local = packfile;
522
523 /*
524 * If there is data present from a previous transfer attempt,
525 * resume where it left off
526 */
527 prev_posn = ftell(packfile);
528 if (prev_posn>0) {
529 if (push_verbosely)
530 fprintf(stderr,
531 "Resuming fetch of pack %s at byte %ld\n",
532 sha1_to_hex(target->sha1), prev_posn);
533 sprintf(range, "Range: bytes=%ld-", prev_posn);
534 range_header = curl_slist_append(range_header, range);
535 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
536 }
537
538 /* Try to get the request started, abort the request on error */
539 request->state = RUN_FETCH_PACKED;
540 if (!start_active_slot(slot)) {
541 fprintf(stderr, "Unable to start GET request\n");
542 repo->can_update_info_refs = 0;
543 release_request(request);
544 }
545 }
546
547 static void start_put(struct transfer_request *request)
548 {
549 char *hex = sha1_to_hex(request->obj->sha1);
550 struct active_request_slot *slot;
551 struct strbuf buf = STRBUF_INIT;
552 enum object_type type;
553 char hdr[50];
554 void *unpacked;
555 unsigned long len;
556 int hdrlen;
557 ssize_t size;
558 z_stream stream;
559
560 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
561 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
562
563 /* Set it up */
564 memset(&stream, 0, sizeof(stream));
565 deflateInit(&stream, zlib_compression_level);
566 size = deflateBound(&stream, len + hdrlen);
567 strbuf_init(&request->buffer.buf, size);
568 request->buffer.posn = 0;
569
570 /* Compress it */
571 stream.next_out = (unsigned char *)request->buffer.buf.buf;
572 stream.avail_out = size;
573
574 /* First header.. */
575 stream.next_in = (void *)hdr;
576 stream.avail_in = hdrlen;
577 while (deflate(&stream, 0) == Z_OK)
578 /* nothing */;
579
580 /* Then the data itself.. */
581 stream.next_in = unpacked;
582 stream.avail_in = len;
583 while (deflate(&stream, Z_FINISH) == Z_OK)
584 /* nothing */;
585 deflateEnd(&stream);
586 free(unpacked);
587
588 request->buffer.buf.len = stream.total_out;
589
590 strbuf_addstr(&buf, "Destination: ");
591 append_remote_object_url(&buf, repo->url, hex, 0);
592 request->dest = strbuf_detach(&buf, NULL);
593
594 append_remote_object_url(&buf, repo->url, hex, 0);
595 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
596 request->url = strbuf_detach(&buf, NULL);
597
598 slot = get_active_slot();
599 slot->callback_func = process_response;
600 slot->callback_data = request;
601 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
602 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
603 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
604 #ifndef NO_CURL_IOCTL
605 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
606 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
607 #endif
608 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
609 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
610 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
611 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
612 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
613 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
614
615 if (start_active_slot(slot)) {
616 request->slot = slot;
617 request->state = RUN_PUT;
618 } else {
619 request->state = ABORTED;
620 free(request->url);
621 request->url = NULL;
622 }
623 }
624
625 static void start_move(struct transfer_request *request)
626 {
627 struct active_request_slot *slot;
628 struct curl_slist *dav_headers = NULL;
629
630 slot = get_active_slot();
631 slot->callback_func = process_response;
632 slot->callback_data = request;
633 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
634 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
635 dav_headers = curl_slist_append(dav_headers, request->dest);
636 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
637 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
638 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
639 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
640
641 if (start_active_slot(slot)) {
642 request->slot = slot;
643 request->state = RUN_MOVE;
644 } else {
645 request->state = ABORTED;
646 free(request->url);
647 request->url = NULL;
648 }
649 }
650
651 static int refresh_lock(struct remote_lock *lock)
652 {
653 struct active_request_slot *slot;
654 struct slot_results results;
655 struct curl_slist *dav_headers;
656 int rc = 0;
657
658 lock->refreshing = 1;
659
660 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
661
662 slot = get_active_slot();
663 slot->results = &results;
664 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
665 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
666 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
667 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
668 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
669
670 if (start_active_slot(slot)) {
671 run_active_slot(slot);
672 if (results.curl_result != CURLE_OK) {
673 fprintf(stderr, "LOCK HTTP error %ld\n",
674 results.http_code);
675 } else {
676 lock->start_time = time(NULL);
677 rc = 1;
678 }
679 }
680
681 lock->refreshing = 0;
682 curl_slist_free_all(dav_headers);
683
684 return rc;
685 }
686
687 static void check_locks(void)
688 {
689 struct remote_lock *lock = repo->locks;
690 time_t current_time = time(NULL);
691 int time_remaining;
692
693 while (lock) {
694 time_remaining = lock->start_time + lock->timeout -
695 current_time;
696 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
697 if (!refresh_lock(lock)) {
698 fprintf(stderr,
699 "Unable to refresh lock for %s\n",
700 lock->url);
701 aborted = 1;
702 return;
703 }
704 }
705 lock = lock->next;
706 }
707 }
708
709 static void release_request(struct transfer_request *request)
710 {
711 struct transfer_request *entry = request_queue_head;
712
713 if (request == request_queue_head) {
714 request_queue_head = request->next;
715 } else {
716 while (entry->next != NULL && entry->next != request)
717 entry = entry->next;
718 if (entry->next == request)
719 entry->next = entry->next->next;
720 }
721
722 if (request->local_fileno != -1)
723 close(request->local_fileno);
724 if (request->local_stream)
725 fclose(request->local_stream);
726 free(request->url);
727 free(request);
728 }
729
730 static void finish_request(struct transfer_request *request)
731 {
732 struct stat st;
733 struct packed_git *target;
734 struct packed_git **lst;
735 struct active_request_slot *slot;
736
737 request->curl_result = request->slot->curl_result;
738 request->http_code = request->slot->http_code;
739 slot = request->slot;
740 request->slot = NULL;
741
742 /* Keep locks active */
743 check_locks();
744
745 if (request->headers != NULL)
746 curl_slist_free_all(request->headers);
747
748 /* URL is reused for MOVE after PUT */
749 if (request->state != RUN_PUT) {
750 free(request->url);
751 request->url = NULL;
752 }
753
754 if (request->state == RUN_MKCOL) {
755 if (request->curl_result == CURLE_OK ||
756 request->http_code == 405) {
757 remote_dir_exists[request->obj->sha1[0]] = 1;
758 start_put(request);
759 } else {
760 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
761 sha1_to_hex(request->obj->sha1),
762 request->curl_result, request->http_code);
763 request->state = ABORTED;
764 aborted = 1;
765 }
766 } else if (request->state == RUN_PUT) {
767 if (request->curl_result == CURLE_OK) {
768 start_move(request);
769 } else {
770 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
771 sha1_to_hex(request->obj->sha1),
772 request->curl_result, request->http_code);
773 request->state = ABORTED;
774 aborted = 1;
775 }
776 } else if (request->state == RUN_MOVE) {
777 if (request->curl_result == CURLE_OK) {
778 if (push_verbosely)
779 fprintf(stderr, " sent %s\n",
780 sha1_to_hex(request->obj->sha1));
781 request->obj->flags |= REMOTE;
782 release_request(request);
783 } else {
784 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
785 sha1_to_hex(request->obj->sha1),
786 request->curl_result, request->http_code);
787 request->state = ABORTED;
788 aborted = 1;
789 }
790 } else if (request->state == RUN_FETCH_LOOSE) {
791 close(request->local_fileno);
792 request->local_fileno = -1;
793
794 if (request->curl_result != CURLE_OK &&
795 request->http_code != 416) {
796 if (stat(request->tmpfile, &st) == 0) {
797 if (st.st_size == 0)
798 unlink_or_warn(request->tmpfile);
799 }
800 } else {
801 if (request->http_code == 416)
802 warning("requested range invalid; we may already have all the data.");
803
804 git_inflate_end(&request->stream);
805 git_SHA1_Final(request->real_sha1, &request->c);
806 if (request->zret != Z_STREAM_END) {
807 unlink_or_warn(request->tmpfile);
808 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
809 unlink_or_warn(request->tmpfile);
810 } else {
811 request->rename =
812 move_temp_to_file(
813 request->tmpfile,
814 request->filename);
815 if (request->rename == 0)
816 request->obj->flags |= (LOCAL | REMOTE);
817 }
818 }
819
820 /* Try fetching packed if necessary */
821 if (request->obj->flags & LOCAL)
822 release_request(request);
823 else
824 start_fetch_packed(request);
825
826 } else if (request->state == RUN_FETCH_PACKED) {
827 if (request->curl_result != CURLE_OK) {
828 fprintf(stderr, "Unable to get pack file %s\n%s",
829 request->url, curl_errorstr);
830 repo->can_update_info_refs = 0;
831 } else {
832 off_t pack_size = ftell(request->local_stream);
833
834 fclose(request->local_stream);
835 request->local_stream = NULL;
836 slot->local = NULL;
837 if (!move_temp_to_file(request->tmpfile,
838 request->filename)) {
839 target = (struct packed_git *)request->userData;
840 target->pack_size = pack_size;
841 lst = &repo->packs;
842 while (*lst != target)
843 lst = &((*lst)->next);
844 *lst = (*lst)->next;
845
846 if (!verify_pack(target))
847 install_packed_git(target);
848 else
849 repo->can_update_info_refs = 0;
850 }
851 }
852 release_request(request);
853 }
854 }
855
856 #ifdef USE_CURL_MULTI
857 static int is_running_queue;
858 static int fill_active_slot(void *unused)
859 {
860 struct transfer_request *request;
861
862 if (aborted || !is_running_queue)
863 return 0;
864
865 for (request = request_queue_head; request; request = request->next) {
866 if (request->state == NEED_FETCH) {
867 start_fetch_loose(request);
868 return 1;
869 } else if (pushing && request->state == NEED_PUSH) {
870 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
871 start_put(request);
872 } else {
873 start_mkcol(request);
874 }
875 return 1;
876 }
877 }
878 return 0;
879 }
880 #endif
881
882 static void get_remote_object_list(unsigned char parent);
883
884 static void add_fetch_request(struct object *obj)
885 {
886 struct transfer_request *request;
887
888 check_locks();
889
890 /*
891 * Don't fetch the object if it's known to exist locally
892 * or is already in the request queue
893 */
894 if (remote_dir_exists[obj->sha1[0]] == -1)
895 get_remote_object_list(obj->sha1[0]);
896 if (obj->flags & (LOCAL | FETCHING))
897 return;
898
899 obj->flags |= FETCHING;
900 request = xmalloc(sizeof(*request));
901 request->obj = obj;
902 request->url = NULL;
903 request->lock = NULL;
904 request->headers = NULL;
905 request->local_fileno = -1;
906 request->local_stream = NULL;
907 request->state = NEED_FETCH;
908 request->next = request_queue_head;
909 request_queue_head = request;
910
911 #ifdef USE_CURL_MULTI
912 fill_active_slots();
913 step_active_slots();
914 #endif
915 }
916
917 static int add_send_request(struct object *obj, struct remote_lock *lock)
918 {
919 struct transfer_request *request = request_queue_head;
920 struct packed_git *target;
921
922 /* Keep locks active */
923 check_locks();
924
925 /*
926 * Don't push the object if it's known to exist on the remote
927 * or is already in the request queue
928 */
929 if (remote_dir_exists[obj->sha1[0]] == -1)
930 get_remote_object_list(obj->sha1[0]);
931 if (obj->flags & (REMOTE | PUSHING))
932 return 0;
933 target = find_sha1_pack(obj->sha1, repo->packs);
934 if (target) {
935 obj->flags |= REMOTE;
936 return 0;
937 }
938
939 obj->flags |= PUSHING;
940 request = xmalloc(sizeof(*request));
941 request->obj = obj;
942 request->url = NULL;
943 request->lock = lock;
944 request->headers = NULL;
945 request->local_fileno = -1;
946 request->local_stream = NULL;
947 request->state = NEED_PUSH;
948 request->next = request_queue_head;
949 request_queue_head = request;
950
951 #ifdef USE_CURL_MULTI
952 fill_active_slots();
953 step_active_slots();
954 #endif
955
956 return 1;
957 }
958
959 static int fetch_index(unsigned char *sha1)
960 {
961 int ret = 0;
962 char *hex = xstrdup(sha1_to_hex(sha1));
963 char *filename;
964 char *url;
965 char tmpfile[PATH_MAX];
966 long prev_posn = 0;
967 char range[RANGE_HEADER_SIZE];
968 struct curl_slist *range_header = NULL;
969
970 FILE *indexfile;
971 struct active_request_slot *slot;
972 struct slot_results results;
973
974 /* Don't use the index if the pack isn't there */
975 url = xmalloc(strlen(repo->url) + 64);
976 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
977 slot = get_active_slot();
978 slot->results = &results;
979 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
980 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
981 if (start_active_slot(slot)) {
982 run_active_slot(slot);
983 if (results.curl_result != CURLE_OK) {
984 ret = error("Unable to verify pack %s is available",
985 hex);
986 goto cleanup_pack;
987 }
988 } else {
989 ret = error("Unable to start request");
990 goto cleanup_pack;
991 }
992
993 if (has_pack_index(sha1)) {
994 ret = 0;
995 goto cleanup_pack;
996 }
997
998 if (push_verbosely)
999 fprintf(stderr, "Getting index for pack %s\n", hex);
1000
1001 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
1002
1003 filename = sha1_pack_index_name(sha1);
1004 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
1005 indexfile = fopen(tmpfile, "a");
1006 if (!indexfile) {
1007 ret = error("Unable to open local file %s for pack index",
1008 tmpfile);
1009 goto cleanup_pack;
1010 }
1011
1012 slot = get_active_slot();
1013 slot->results = &results;
1014 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1015 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1016 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
1017 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1018 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1019 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1020 slot->local = indexfile;
1021
1022 /*
1023 * If there is data present from a previous transfer attempt,
1024 * resume where it left off
1025 */
1026 prev_posn = ftell(indexfile);
1027 if (prev_posn>0) {
1028 if (push_verbosely)
1029 fprintf(stderr,
1030 "Resuming fetch of index for pack %s at byte %ld\n",
1031 hex, prev_posn);
1032 sprintf(range, "Range: bytes=%ld-", prev_posn);
1033 range_header = curl_slist_append(range_header, range);
1034 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
1035 }
1036
1037 if (start_active_slot(slot)) {
1038 run_active_slot(slot);
1039 if (results.curl_result != CURLE_OK) {
1040 ret = error("Unable to get pack index %s\n%s", url,
1041 curl_errorstr);
1042 goto cleanup_index;
1043 }
1044 } else {
1045 ret = error("Unable to start request");
1046 goto cleanup_index;
1047 }
1048
1049 ret = move_temp_to_file(tmpfile, filename);
1050
1051 cleanup_index:
1052 fclose(indexfile);
1053 slot->local = NULL;
1054 cleanup_pack:
1055 free(url);
1056 free(hex);
1057 return ret;
1058 }
1059
1060 static int setup_index(unsigned char *sha1)
1061 {
1062 struct packed_git *new_pack;
1063
1064 if (fetch_index(sha1))
1065 return -1;
1066
1067 new_pack = parse_pack_index(sha1);
1068 new_pack->next = repo->packs;
1069 repo->packs = new_pack;
1070 return 0;
1071 }
1072
1073 static int fetch_indices(void)
1074 {
1075 unsigned char sha1[20];
1076 char *url;
1077 struct strbuf buffer = STRBUF_INIT;
1078 char *data;
1079 int i = 0;
1080
1081 struct active_request_slot *slot;
1082 struct slot_results results;
1083
1084 if (push_verbosely)
1085 fprintf(stderr, "Getting pack list\n");
1086
1087 url = xmalloc(strlen(repo->url) + 20);
1088 sprintf(url, "%sobjects/info/packs", repo->url);
1089
1090 slot = get_active_slot();
1091 slot->results = &results;
1092 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1093 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1094 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1095 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1096 if (start_active_slot(slot)) {
1097 run_active_slot(slot);
1098 if (results.curl_result != CURLE_OK) {
1099 strbuf_release(&buffer);
1100 free(url);
1101 if (results.http_code == 404)
1102 return 0;
1103 else
1104 return error("%s", curl_errorstr);
1105 }
1106 } else {
1107 strbuf_release(&buffer);
1108 free(url);
1109 return error("Unable to start request");
1110 }
1111 free(url);
1112
1113 data = buffer.buf;
1114 while (i < buffer.len) {
1115 switch (data[i]) {
1116 case 'P':
1117 i++;
1118 if (i + 52 < buffer.len &&
1119 !prefixcmp(data + i, " pack-") &&
1120 !prefixcmp(data + i + 46, ".pack\n")) {
1121 get_sha1_hex(data + i + 6, sha1);
1122 setup_index(sha1);
1123 i += 51;
1124 break;
1125 }
1126 default:
1127 while (data[i] != '\n')
1128 i++;
1129 }
1130 i++;
1131 }
1132
1133 strbuf_release(&buffer);
1134 return 0;
1135 }
1136
1137 static void one_remote_object(const char *hex)
1138 {
1139 unsigned char sha1[20];
1140 struct object *obj;
1141
1142 if (get_sha1_hex(hex, sha1) != 0)
1143 return;
1144
1145 obj = lookup_object(sha1);
1146 if (!obj)
1147 obj = parse_object(sha1);
1148
1149 /* Ignore remote objects that don't exist locally */
1150 if (!obj)
1151 return;
1152
1153 obj->flags |= REMOTE;
1154 if (!object_list_contains(objects, obj))
1155 object_list_insert(obj, &objects);
1156 }
1157
1158 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1159 {
1160 int *lock_flags = (int *)ctx->userData;
1161
1162 if (tag_closed) {
1163 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1164 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1165 (*lock_flags & DAV_PROP_LOCKWR)) {
1166 *lock_flags |= DAV_LOCK_OK;
1167 }
1168 *lock_flags &= DAV_LOCK_OK;
1169 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1170 *lock_flags |= DAV_PROP_LOCKWR;
1171 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1172 *lock_flags |= DAV_PROP_LOCKEX;
1173 }
1174 }
1175 }
1176
1177 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1178 {
1179 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1180 git_SHA_CTX sha_ctx;
1181 unsigned char lock_token_sha1[20];
1182
1183 if (tag_closed && ctx->cdata) {
1184 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1185 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1186 strcpy(lock->owner, ctx->cdata);
1187 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1188 if (!prefixcmp(ctx->cdata, "Second-"))
1189 lock->timeout =
1190 strtol(ctx->cdata + 7, NULL, 10);
1191 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1192 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1193 strcpy(lock->token, ctx->cdata);
1194
1195 git_SHA1_Init(&sha_ctx);
1196 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1197 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1198
1199 lock->tmpfile_suffix[0] = '_';
1200 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1201 }
1202 }
1203 }
1204
1205 static void one_remote_ref(char *refname);
1206
1207 static void
1208 xml_start_tag(void *userData, const char *name, const char **atts)
1209 {
1210 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1211 const char *c = strchr(name, ':');
1212 int new_len;
1213
1214 if (c == NULL)
1215 c = name;
1216 else
1217 c++;
1218
1219 new_len = strlen(ctx->name) + strlen(c) + 2;
1220
1221 if (new_len > ctx->len) {
1222 ctx->name = xrealloc(ctx->name, new_len);
1223 ctx->len = new_len;
1224 }
1225 strcat(ctx->name, ".");
1226 strcat(ctx->name, c);
1227
1228 free(ctx->cdata);
1229 ctx->cdata = NULL;
1230
1231 ctx->userFunc(ctx, 0);
1232 }
1233
1234 static void
1235 xml_end_tag(void *userData, const char *name)
1236 {
1237 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1238 const char *c = strchr(name, ':');
1239 char *ep;
1240
1241 ctx->userFunc(ctx, 1);
1242
1243 if (c == NULL)
1244 c = name;
1245 else
1246 c++;
1247
1248 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1249 *ep = 0;
1250 }
1251
1252 static void
1253 xml_cdata(void *userData, const XML_Char *s, int len)
1254 {
1255 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1256 free(ctx->cdata);
1257 ctx->cdata = xmemdupz(s, len);
1258 }
1259
1260 static struct remote_lock *lock_remote(const char *path, long timeout)
1261 {
1262 struct active_request_slot *slot;
1263 struct slot_results results;
1264 struct buffer out_buffer = { STRBUF_INIT, 0 };
1265 struct strbuf in_buffer = STRBUF_INIT;
1266 char *url;
1267 char *ep;
1268 char timeout_header[25];
1269 struct remote_lock *lock = NULL;
1270 struct curl_slist *dav_headers = NULL;
1271 struct xml_ctx ctx;
1272 char *escaped;
1273
1274 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1275 sprintf(url, "%s%s", repo->url, path);
1276
1277 /* Make sure leading directories exist for the remote ref */
1278 ep = strchr(url + strlen(repo->url) + 1, '/');
1279 while (ep) {
1280 char saved_character = ep[1];
1281 ep[1] = '\0';
1282 slot = get_active_slot();
1283 slot->results = &results;
1284 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1285 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1286 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1287 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1288 if (start_active_slot(slot)) {
1289 run_active_slot(slot);
1290 if (results.curl_result != CURLE_OK &&
1291 results.http_code != 405) {
1292 fprintf(stderr,
1293 "Unable to create branch path %s\n",
1294 url);
1295 free(url);
1296 return NULL;
1297 }
1298 } else {
1299 fprintf(stderr, "Unable to start MKCOL request\n");
1300 free(url);
1301 return NULL;
1302 }
1303 ep[1] = saved_character;
1304 ep = strchr(ep + 1, '/');
1305 }
1306
1307 escaped = xml_entities(git_default_email);
1308 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
1309 free(escaped);
1310
1311 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1312 dav_headers = curl_slist_append(dav_headers, timeout_header);
1313 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1314
1315 slot = get_active_slot();
1316 slot->results = &results;
1317 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1318 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1319 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1320 #ifndef NO_CURL_IOCTL
1321 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1322 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1323 #endif
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 free(lock->token);
1369 free(lock->owner);
1370 free(url);
1371 free(lock);
1372 lock = NULL;
1373 } else {
1374 lock->url = url;
1375 lock->start_time = time(NULL);
1376 lock->next = repo->locks;
1377 repo->locks = lock;
1378 }
1379
1380 return lock;
1381 }
1382
1383 static int unlock_remote(struct remote_lock *lock)
1384 {
1385 struct active_request_slot *slot;
1386 struct slot_results results;
1387 struct remote_lock *prev = repo->locks;
1388 struct curl_slist *dav_headers;
1389 int rc = 0;
1390
1391 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1392
1393 slot = get_active_slot();
1394 slot->results = &results;
1395 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1396 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1397 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1398 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1399
1400 if (start_active_slot(slot)) {
1401 run_active_slot(slot);
1402 if (results.curl_result == CURLE_OK)
1403 rc = 1;
1404 else
1405 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1406 results.http_code);
1407 } else {
1408 fprintf(stderr, "Unable to start UNLOCK request\n");
1409 }
1410
1411 curl_slist_free_all(dav_headers);
1412
1413 if (repo->locks == lock) {
1414 repo->locks = lock->next;
1415 } else {
1416 while (prev && prev->next != lock)
1417 prev = prev->next;
1418 if (prev)
1419 prev->next = prev->next->next;
1420 }
1421
1422 free(lock->owner);
1423 free(lock->url);
1424 free(lock->token);
1425 free(lock);
1426
1427 return rc;
1428 }
1429
1430 static void remove_locks(void)
1431 {
1432 struct remote_lock *lock = repo->locks;
1433
1434 fprintf(stderr, "Removing remote locks...\n");
1435 while (lock) {
1436 unlock_remote(lock);
1437 lock = lock->next;
1438 }
1439 }
1440
1441 static void remove_locks_on_signal(int signo)
1442 {
1443 remove_locks();
1444 sigchain_pop(signo);
1445 raise(signo);
1446 }
1447
1448 static void remote_ls(const char *path, int flags,
1449 void (*userFunc)(struct remote_ls_ctx *ls),
1450 void *userData);
1451
1452 static void process_ls_object(struct remote_ls_ctx *ls)
1453 {
1454 unsigned int *parent = (unsigned int *)ls->userData;
1455 char *path = ls->dentry_name;
1456 char *obj_hex;
1457
1458 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1459 remote_dir_exists[*parent] = 1;
1460 return;
1461 }
1462
1463 if (strlen(path) != 49)
1464 return;
1465 path += 8;
1466 obj_hex = xmalloc(strlen(path));
1467 /* NB: path is not null-terminated, can not use strlcpy here */
1468 memcpy(obj_hex, path, 2);
1469 strcpy(obj_hex + 2, path + 3);
1470 one_remote_object(obj_hex);
1471 free(obj_hex);
1472 }
1473
1474 static void process_ls_ref(struct remote_ls_ctx *ls)
1475 {
1476 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1477 fprintf(stderr, " %s\n", ls->dentry_name);
1478 return;
1479 }
1480
1481 if (!(ls->dentry_flags & IS_DIR))
1482 one_remote_ref(ls->dentry_name);
1483 }
1484
1485 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1486 {
1487 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1488
1489 if (tag_closed) {
1490 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1491 if (ls->dentry_flags & IS_DIR) {
1492 if (ls->flags & PROCESS_DIRS) {
1493 ls->userFunc(ls);
1494 }
1495 if (strcmp(ls->dentry_name, ls->path) &&
1496 ls->flags & RECURSIVE) {
1497 remote_ls(ls->dentry_name,
1498 ls->flags,
1499 ls->userFunc,
1500 ls->userData);
1501 }
1502 } else if (ls->flags & PROCESS_FILES) {
1503 ls->userFunc(ls);
1504 }
1505 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1506 char *path = ctx->cdata;
1507 if (*ctx->cdata == 'h') {
1508 path = strstr(path, "//");
1509 if (path) {
1510 path = strchr(path+2, '/');
1511 }
1512 }
1513 if (path) {
1514 path += repo->path_len;
1515 ls->dentry_name = xstrdup(path);
1516 }
1517 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1518 ls->dentry_flags |= IS_DIR;
1519 }
1520 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1521 free(ls->dentry_name);
1522 ls->dentry_name = NULL;
1523 ls->dentry_flags = 0;
1524 }
1525 }
1526
1527 /*
1528 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1529 * should _only_ heed the information from that file, instead of trying to
1530 * determine the refs from the remote file system (badly: it does not even
1531 * know about packed-refs).
1532 */
1533 static void remote_ls(const char *path, int flags,
1534 void (*userFunc)(struct remote_ls_ctx *ls),
1535 void *userData)
1536 {
1537 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1538 struct active_request_slot *slot;
1539 struct slot_results results;
1540 struct strbuf in_buffer = STRBUF_INIT;
1541 struct buffer out_buffer = { STRBUF_INIT, 0 };
1542 struct curl_slist *dav_headers = NULL;
1543 struct xml_ctx ctx;
1544 struct remote_ls_ctx ls;
1545
1546 ls.flags = flags;
1547 ls.path = xstrdup(path);
1548 ls.dentry_name = NULL;
1549 ls.dentry_flags = 0;
1550 ls.userData = userData;
1551 ls.userFunc = userFunc;
1552
1553 sprintf(url, "%s%s", repo->url, path);
1554
1555 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1556
1557 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1558 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1559
1560 slot = get_active_slot();
1561 slot->results = &results;
1562 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1563 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1564 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1565 #ifndef NO_CURL_IOCTL
1566 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1567 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1568 #endif
1569 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1570 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1571 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1572 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1573 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1574 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1575
1576 if (start_active_slot(slot)) {
1577 run_active_slot(slot);
1578 if (results.curl_result == CURLE_OK) {
1579 XML_Parser parser = XML_ParserCreate(NULL);
1580 enum XML_Status result;
1581 ctx.name = xcalloc(10, 1);
1582 ctx.len = 0;
1583 ctx.cdata = NULL;
1584 ctx.userFunc = handle_remote_ls_ctx;
1585 ctx.userData = &ls;
1586 XML_SetUserData(parser, &ctx);
1587 XML_SetElementHandler(parser, xml_start_tag,
1588 xml_end_tag);
1589 XML_SetCharacterDataHandler(parser, xml_cdata);
1590 result = XML_Parse(parser, in_buffer.buf,
1591 in_buffer.len, 1);
1592 free(ctx.name);
1593
1594 if (result != XML_STATUS_OK) {
1595 fprintf(stderr, "XML error: %s\n",
1596 XML_ErrorString(
1597 XML_GetErrorCode(parser)));
1598 }
1599 XML_ParserFree(parser);
1600 }
1601 } else {
1602 fprintf(stderr, "Unable to start PROPFIND request\n");
1603 }
1604
1605 free(ls.path);
1606 free(url);
1607 strbuf_release(&out_buffer.buf);
1608 strbuf_release(&in_buffer);
1609 curl_slist_free_all(dav_headers);
1610 }
1611
1612 static void get_remote_object_list(unsigned char parent)
1613 {
1614 char path[] = "objects/XX/";
1615 static const char hex[] = "0123456789abcdef";
1616 unsigned int val = parent;
1617
1618 path[8] = hex[val >> 4];
1619 path[9] = hex[val & 0xf];
1620 remote_dir_exists[val] = 0;
1621 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1622 process_ls_object, &val);
1623 }
1624
1625 static int locking_available(void)
1626 {
1627 struct active_request_slot *slot;
1628 struct slot_results results;
1629 struct strbuf in_buffer = STRBUF_INIT;
1630 struct buffer out_buffer = { STRBUF_INIT, 0 };
1631 struct curl_slist *dav_headers = NULL;
1632 struct xml_ctx ctx;
1633 int lock_flags = 0;
1634 char *escaped;
1635
1636 escaped = xml_entities(repo->url);
1637 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1638 free(escaped);
1639
1640 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1641 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1642
1643 slot = get_active_slot();
1644 slot->results = &results;
1645 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1646 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1647 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1648 #ifndef NO_CURL_IOCTL
1649 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1650 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1651 #endif
1652 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1653 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1654 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1655 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1656 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1657 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1658
1659 if (start_active_slot(slot)) {
1660 run_active_slot(slot);
1661 if (results.curl_result == CURLE_OK) {
1662 XML_Parser parser = XML_ParserCreate(NULL);
1663 enum XML_Status result;
1664 ctx.name = xcalloc(10, 1);
1665 ctx.len = 0;
1666 ctx.cdata = NULL;
1667 ctx.userFunc = handle_lockprop_ctx;
1668 ctx.userData = &lock_flags;
1669 XML_SetUserData(parser, &ctx);
1670 XML_SetElementHandler(parser, xml_start_tag,
1671 xml_end_tag);
1672 result = XML_Parse(parser, in_buffer.buf,
1673 in_buffer.len, 1);
1674 free(ctx.name);
1675
1676 if (result != XML_STATUS_OK) {
1677 fprintf(stderr, "XML error: %s\n",
1678 XML_ErrorString(
1679 XML_GetErrorCode(parser)));
1680 lock_flags = 0;
1681 }
1682 XML_ParserFree(parser);
1683 if (!lock_flags)
1684 error("no DAV locking support on %s",
1685 repo->url);
1686
1687 } else {
1688 error("Cannot access URL %s, return code %d",
1689 repo->url, results.curl_result);
1690 lock_flags = 0;
1691 }
1692 } else {
1693 error("Unable to start PROPFIND request on %s", repo->url);
1694 }
1695
1696 strbuf_release(&out_buffer.buf);
1697 strbuf_release(&in_buffer);
1698 curl_slist_free_all(dav_headers);
1699
1700 return lock_flags;
1701 }
1702
1703 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1704 {
1705 struct object_list *entry = xmalloc(sizeof(struct object_list));
1706 entry->item = obj;
1707 entry->next = *p;
1708 *p = entry;
1709 return &entry->next;
1710 }
1711
1712 static struct object_list **process_blob(struct blob *blob,
1713 struct object_list **p,
1714 struct name_path *path,
1715 const char *name)
1716 {
1717 struct object *obj = &blob->object;
1718
1719 obj->flags |= LOCAL;
1720
1721 if (obj->flags & (UNINTERESTING | SEEN))
1722 return p;
1723
1724 obj->flags |= SEEN;
1725 return add_one_object(obj, p);
1726 }
1727
1728 static struct object_list **process_tree(struct tree *tree,
1729 struct object_list **p,
1730 struct name_path *path,
1731 const char *name)
1732 {
1733 struct object *obj = &tree->object;
1734 struct tree_desc desc;
1735 struct name_entry entry;
1736 struct name_path me;
1737
1738 obj->flags |= LOCAL;
1739
1740 if (obj->flags & (UNINTERESTING | SEEN))
1741 return p;
1742 if (parse_tree(tree) < 0)
1743 die("bad tree object %s", sha1_to_hex(obj->sha1));
1744
1745 obj->flags |= SEEN;
1746 name = xstrdup(name);
1747 p = add_one_object(obj, p);
1748 me.up = path;
1749 me.elem = name;
1750 me.elem_len = strlen(name);
1751
1752 init_tree_desc(&desc, tree->buffer, tree->size);
1753
1754 while (tree_entry(&desc, &entry))
1755 switch (object_type(entry.mode)) {
1756 case OBJ_TREE:
1757 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1758 break;
1759 case OBJ_BLOB:
1760 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1761 break;
1762 default:
1763 /* Subproject commit - not in this repository */
1764 break;
1765 }
1766
1767 free(tree->buffer);
1768 tree->buffer = NULL;
1769 return p;
1770 }
1771
1772 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1773 {
1774 int i;
1775 struct commit *commit;
1776 struct object_list **p = &objects;
1777 int count = 0;
1778
1779 while ((commit = get_revision(revs)) != NULL) {
1780 p = process_tree(commit->tree, p, NULL, "");
1781 commit->object.flags |= LOCAL;
1782 if (!(commit->object.flags & UNINTERESTING))
1783 count += add_send_request(&commit->object, lock);
1784 }
1785
1786 for (i = 0; i < revs->pending.nr; i++) {
1787 struct object_array_entry *entry = revs->pending.objects + i;
1788 struct object *obj = entry->item;
1789 const char *name = entry->name;
1790
1791 if (obj->flags & (UNINTERESTING | SEEN))
1792 continue;
1793 if (obj->type == OBJ_TAG) {
1794 obj->flags |= SEEN;
1795 p = add_one_object(obj, p);
1796 continue;
1797 }
1798 if (obj->type == OBJ_TREE) {
1799 p = process_tree((struct tree *)obj, p, NULL, name);
1800 continue;
1801 }
1802 if (obj->type == OBJ_BLOB) {
1803 p = process_blob((struct blob *)obj, p, NULL, name);
1804 continue;
1805 }
1806 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1807 }
1808
1809 while (objects) {
1810 if (!(objects->item->flags & UNINTERESTING))
1811 count += add_send_request(objects->item, lock);
1812 objects = objects->next;
1813 }
1814
1815 return count;
1816 }
1817
1818 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1819 {
1820 struct active_request_slot *slot;
1821 struct slot_results results;
1822 struct buffer out_buffer = { STRBUF_INIT, 0 };
1823 struct curl_slist *dav_headers;
1824
1825 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1826
1827 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1828
1829 slot = get_active_slot();
1830 slot->results = &results;
1831 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1832 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1833 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1834 #ifndef NO_CURL_IOCTL
1835 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1836 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1837 #endif
1838 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1839 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1840 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1841 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1842 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1843 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1844
1845 if (start_active_slot(slot)) {
1846 run_active_slot(slot);
1847 strbuf_release(&out_buffer.buf);
1848 if (results.curl_result != CURLE_OK) {
1849 fprintf(stderr,
1850 "PUT error: curl result=%d, HTTP code=%ld\n",
1851 results.curl_result, results.http_code);
1852 /* We should attempt recovery? */
1853 return 0;
1854 }
1855 } else {
1856 strbuf_release(&out_buffer.buf);
1857 fprintf(stderr, "Unable to start PUT request\n");
1858 return 0;
1859 }
1860
1861 return 1;
1862 }
1863
1864 static struct ref *remote_refs, **remote_tail;
1865
1866 static void one_remote_ref(char *refname)
1867 {
1868 struct ref *ref;
1869 struct object *obj;
1870
1871 ref = alloc_ref(refname);
1872
1873 if (http_fetch_ref(repo->url, ref) != 0) {
1874 fprintf(stderr,
1875 "Unable to fetch ref %s from %s\n",
1876 refname, repo->url);
1877 free(ref);
1878 return;
1879 }
1880
1881 /*
1882 * Fetch a copy of the object if it doesn't exist locally - it
1883 * may be required for updating server info later.
1884 */
1885 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1886 obj = lookup_unknown_object(ref->old_sha1);
1887 if (obj) {
1888 fprintf(stderr, " fetch %s for %s\n",
1889 sha1_to_hex(ref->old_sha1), refname);
1890 add_fetch_request(obj);
1891 }
1892 }
1893
1894 *remote_tail = ref;
1895 remote_tail = &ref->next;
1896 }
1897
1898 static void get_dav_remote_heads(void)
1899 {
1900 remote_tail = &remote_refs;
1901 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1902 }
1903
1904 static int is_zero_sha1(const unsigned char *sha1)
1905 {
1906 int i;
1907
1908 for (i = 0; i < 20; i++) {
1909 if (*sha1++)
1910 return 0;
1911 }
1912 return 1;
1913 }
1914
1915 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1916 {
1917 struct strbuf *buf = (struct strbuf *)ls->userData;
1918 struct object *o;
1919 int len;
1920 char *ref_info;
1921 struct ref *ref;
1922
1923 ref = alloc_ref(ls->dentry_name);
1924
1925 if (http_fetch_ref(repo->url, ref) != 0) {
1926 fprintf(stderr,
1927 "Unable to fetch ref %s from %s\n",
1928 ls->dentry_name, repo->url);
1929 aborted = 1;
1930 free(ref);
1931 return;
1932 }
1933
1934 o = parse_object(ref->old_sha1);
1935 if (!o) {
1936 fprintf(stderr,
1937 "Unable to parse object %s for remote ref %s\n",
1938 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1939 aborted = 1;
1940 free(ref);
1941 return;
1942 }
1943
1944 len = strlen(ls->dentry_name) + 42;
1945 ref_info = xcalloc(len + 1, 1);
1946 sprintf(ref_info, "%s %s\n",
1947 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1948 fwrite_buffer(ref_info, 1, len, buf);
1949 free(ref_info);
1950
1951 if (o->type == OBJ_TAG) {
1952 o = deref_tag(o, ls->dentry_name, 0);
1953 if (o) {
1954 len = strlen(ls->dentry_name) + 45;
1955 ref_info = xcalloc(len + 1, 1);
1956 sprintf(ref_info, "%s %s^{}\n",
1957 sha1_to_hex(o->sha1), ls->dentry_name);
1958 fwrite_buffer(ref_info, 1, len, buf);
1959 free(ref_info);
1960 }
1961 }
1962 free(ref);
1963 }
1964
1965 static void update_remote_info_refs(struct remote_lock *lock)
1966 {
1967 struct buffer buffer = { STRBUF_INIT, 0 };
1968 struct active_request_slot *slot;
1969 struct slot_results results;
1970 struct curl_slist *dav_headers;
1971
1972 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1973 add_remote_info_ref, &buffer.buf);
1974 if (!aborted) {
1975 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1976
1977 slot = get_active_slot();
1978 slot->results = &results;
1979 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1980 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1981 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1982 #ifndef NO_CURL_IOCTL
1983 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1984 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1985 #endif
1986 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1987 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1988 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1989 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1990 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1991 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1992
1993 if (start_active_slot(slot)) {
1994 run_active_slot(slot);
1995 if (results.curl_result != CURLE_OK) {
1996 fprintf(stderr,
1997 "PUT error: curl result=%d, HTTP code=%ld\n",
1998 results.curl_result, results.http_code);
1999 }
2000 }
2001 }
2002 strbuf_release(&buffer.buf);
2003 }
2004
2005 static int remote_exists(const char *path)
2006 {
2007 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2008 struct active_request_slot *slot;
2009 struct slot_results results;
2010 int ret = -1;
2011
2012 sprintf(url, "%s%s", repo->url, path);
2013
2014 slot = get_active_slot();
2015 slot->results = &results;
2016 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2017 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2018
2019 if (start_active_slot(slot)) {
2020 run_active_slot(slot);
2021 if (results.http_code == 404)
2022 ret = 0;
2023 else if (results.curl_result == CURLE_OK)
2024 ret = 1;
2025 else
2026 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2027 } else {
2028 fprintf(stderr, "Unable to start HEAD request\n");
2029 }
2030
2031 free(url);
2032 return ret;
2033 }
2034
2035 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2036 {
2037 char *url;
2038 struct strbuf buffer = STRBUF_INIT;
2039 struct active_request_slot *slot;
2040 struct slot_results results;
2041
2042 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2043 sprintf(url, "%s%s", repo->url, path);
2044
2045 slot = get_active_slot();
2046 slot->results = &results;
2047 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2048 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2049 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2050 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2051 if (start_active_slot(slot)) {
2052 run_active_slot(slot);
2053 if (results.curl_result != CURLE_OK) {
2054 die("Couldn't get %s for remote symref\n%s",
2055 url, curl_errorstr);
2056 }
2057 } else {
2058 die("Unable to start remote symref request");
2059 }
2060 free(url);
2061
2062 free(*symref);
2063 *symref = NULL;
2064 hashclr(sha1);
2065
2066 if (buffer.len == 0)
2067 return;
2068
2069 /* If it's a symref, set the refname; otherwise try for a sha1 */
2070 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2071 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2072 } else {
2073 get_sha1_hex(buffer.buf, sha1);
2074 }
2075
2076 strbuf_release(&buffer);
2077 }
2078
2079 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2080 {
2081 struct commit *head = lookup_commit(head_sha1);
2082 struct commit *branch = lookup_commit(branch_sha1);
2083 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2084
2085 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2086 }
2087
2088 static int delete_remote_branch(char *pattern, int force)
2089 {
2090 struct ref *refs = remote_refs;
2091 struct ref *remote_ref = NULL;
2092 unsigned char head_sha1[20];
2093 char *symref = NULL;
2094 int match;
2095 int patlen = strlen(pattern);
2096 int i;
2097 struct active_request_slot *slot;
2098 struct slot_results results;
2099 char *url;
2100
2101 /* Find the remote branch(es) matching the specified branch name */
2102 for (match = 0; refs; refs = refs->next) {
2103 char *name = refs->name;
2104 int namelen = strlen(name);
2105 if (namelen < patlen ||
2106 memcmp(name + namelen - patlen, pattern, patlen))
2107 continue;
2108 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2109 continue;
2110 match++;
2111 remote_ref = refs;
2112 }
2113 if (match == 0)
2114 return error("No remote branch matches %s", pattern);
2115 if (match != 1)
2116 return error("More than one remote branch matches %s",
2117 pattern);
2118
2119 /*
2120 * Remote HEAD must be a symref (not exactly foolproof; a remote
2121 * symlink to a symref will look like a symref)
2122 */
2123 fetch_symref("HEAD", &symref, head_sha1);
2124 if (!symref)
2125 return error("Remote HEAD is not a symref");
2126
2127 /* Remote branch must not be the remote HEAD */
2128 for (i=0; symref && i<MAXDEPTH; i++) {
2129 if (!strcmp(remote_ref->name, symref))
2130 return error("Remote branch %s is the current HEAD",
2131 remote_ref->name);
2132 fetch_symref(symref, &symref, head_sha1);
2133 }
2134
2135 /* Run extra sanity checks if delete is not forced */
2136 if (!force) {
2137 /* Remote HEAD must resolve to a known object */
2138 if (symref)
2139 return error("Remote HEAD symrefs too deep");
2140 if (is_zero_sha1(head_sha1))
2141 return error("Unable to resolve remote HEAD");
2142 if (!has_sha1_file(head_sha1))
2143 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2144
2145 /* Remote branch must resolve to a known object */
2146 if (is_zero_sha1(remote_ref->old_sha1))
2147 return error("Unable to resolve remote branch %s",
2148 remote_ref->name);
2149 if (!has_sha1_file(remote_ref->old_sha1))
2150 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));
2151
2152 /* Remote branch must be an ancestor of remote HEAD */
2153 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2154 return error("The branch '%s' is not an ancestor "
2155 "of your current HEAD.\n"
2156 "If you are sure you want to delete it,"
2157 " run:\n\t'git http-push -D %s %s'",
2158 remote_ref->name, repo->url, pattern);
2159 }
2160 }
2161
2162 /* Send delete request */
2163 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2164 if (dry_run)
2165 return 0;
2166 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2167 sprintf(url, "%s%s", repo->url, remote_ref->name);
2168 slot = get_active_slot();
2169 slot->results = &results;
2170 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2171 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2172 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2173 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2174 if (start_active_slot(slot)) {
2175 run_active_slot(slot);
2176 free(url);
2177 if (results.curl_result != CURLE_OK)
2178 return error("DELETE request failed (%d/%ld)\n",
2179 results.curl_result, results.http_code);
2180 } else {
2181 free(url);
2182 return error("Unable to start DELETE request");
2183 }
2184
2185 return 0;
2186 }
2187
2188 void run_request_queue(void)
2189 {
2190 #ifdef USE_CURL_MULTI
2191 is_running_queue = 1;
2192 fill_active_slots();
2193 add_fill_function(NULL, fill_active_slot);
2194 #endif
2195 do {
2196 finish_all_active_slots();
2197 #ifdef USE_CURL_MULTI
2198 fill_active_slots();
2199 #endif
2200 } while (request_queue_head && !aborted);
2201
2202 #ifdef USE_CURL_MULTI
2203 is_running_queue = 0;
2204 #endif
2205 }
2206
2207 int main(int argc, char **argv)
2208 {
2209 struct transfer_request *request;
2210 struct transfer_request *next_request;
2211 int nr_refspec = 0;
2212 char **refspec = NULL;
2213 struct remote_lock *ref_lock = NULL;
2214 struct remote_lock *info_ref_lock = NULL;
2215 struct rev_info revs;
2216 int delete_branch = 0;
2217 int force_delete = 0;
2218 int objects_to_send;
2219 int rc = 0;
2220 int i;
2221 int new_refs;
2222 struct ref *ref, *local_refs;
2223 struct remote *remote;
2224 char *rewritten_url = NULL;
2225
2226 git_extract_argv0_path(argv[0]);
2227
2228 setup_git_directory();
2229
2230 repo = xcalloc(sizeof(*repo), 1);
2231
2232 argv++;
2233 for (i = 1; i < argc; i++, argv++) {
2234 char *arg = *argv;
2235
2236 if (*arg == '-') {
2237 if (!strcmp(arg, "--all")) {
2238 push_all = MATCH_REFS_ALL;
2239 continue;
2240 }
2241 if (!strcmp(arg, "--force")) {
2242 force_all = 1;
2243 continue;
2244 }
2245 if (!strcmp(arg, "--dry-run")) {
2246 dry_run = 1;
2247 continue;
2248 }
2249 if (!strcmp(arg, "--verbose")) {
2250 push_verbosely = 1;
2251 continue;
2252 }
2253 if (!strcmp(arg, "-d")) {
2254 delete_branch = 1;
2255 continue;
2256 }
2257 if (!strcmp(arg, "-D")) {
2258 delete_branch = 1;
2259 force_delete = 1;
2260 continue;
2261 }
2262 }
2263 if (!repo->url) {
2264 char *path = strstr(arg, "//");
2265 repo->url = arg;
2266 repo->path_len = strlen(arg);
2267 if (path) {
2268 repo->path = strchr(path+2, '/');
2269 if (repo->path)
2270 repo->path_len = strlen(repo->path);
2271 }
2272 continue;
2273 }
2274 refspec = argv;
2275 nr_refspec = argc - i;
2276 break;
2277 }
2278
2279 #ifndef USE_CURL_MULTI
2280 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2281 #endif
2282
2283 if (!repo->url)
2284 usage(http_push_usage);
2285
2286 if (delete_branch && nr_refspec != 1)
2287 die("You must specify only one branch name when deleting a remote branch");
2288
2289 memset(remote_dir_exists, -1, 256);
2290
2291 /*
2292 * Create a minimum remote by hand to give to http_init(),
2293 * primarily to allow it to look at the URL.
2294 */
2295 remote = xcalloc(sizeof(*remote), 1);
2296 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2297 remote->url[remote->url_nr++] = repo->url;
2298 http_init(remote);
2299
2300 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2301
2302 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2303 rewritten_url = xmalloc(strlen(repo->url)+2);
2304 strcpy(rewritten_url, repo->url);
2305 strcat(rewritten_url, "/");
2306 repo->path = rewritten_url + (repo->path - repo->url);
2307 repo->path_len++;
2308 repo->url = rewritten_url;
2309 }
2310
2311 #ifdef USE_CURL_MULTI
2312 is_running_queue = 0;
2313 #endif
2314
2315 /* Verify DAV compliance/lock support */
2316 if (!locking_available()) {
2317 rc = 1;
2318 goto cleanup;
2319 }
2320
2321 sigchain_push_common(remove_locks_on_signal);
2322
2323 /* Check whether the remote has server info files */
2324 repo->can_update_info_refs = 0;
2325 repo->has_info_refs = remote_exists("info/refs");
2326 repo->has_info_packs = remote_exists("objects/info/packs");
2327 if (repo->has_info_refs) {
2328 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2329 if (info_ref_lock)
2330 repo->can_update_info_refs = 1;
2331 else {
2332 error("cannot lock existing info/refs");
2333 rc = 1;
2334 goto cleanup;
2335 }
2336 }
2337 if (repo->has_info_packs)
2338 fetch_indices();
2339
2340 /* Get a list of all local and remote heads to validate refspecs */
2341 local_refs = get_local_heads();
2342 fprintf(stderr, "Fetching remote heads...\n");
2343 get_dav_remote_heads();
2344 run_request_queue();
2345
2346 /* Remove a remote branch if -d or -D was specified */
2347 if (delete_branch) {
2348 if (delete_remote_branch(refspec[0], force_delete) == -1)
2349 fprintf(stderr, "Unable to delete remote branch %s\n",
2350 refspec[0]);
2351 goto cleanup;
2352 }
2353
2354 /* match them up */
2355 if (!remote_tail)
2356 remote_tail = &remote_refs;
2357 if (match_refs(local_refs, remote_refs, &remote_tail,
2358 nr_refspec, (const char **) refspec, push_all)) {
2359 rc = -1;
2360 goto cleanup;
2361 }
2362 if (!remote_refs) {
2363 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2364 rc = 0;
2365 goto cleanup;
2366 }
2367
2368 new_refs = 0;
2369 for (ref = remote_refs; ref; ref = ref->next) {
2370 char old_hex[60], *new_hex;
2371 const char *commit_argv[4];
2372 int commit_argc;
2373 char *new_sha1_hex, *old_sha1_hex;
2374
2375 if (!ref->peer_ref)
2376 continue;
2377
2378 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2379 if (delete_remote_branch(ref->name, 1) == -1) {
2380 error("Could not remove %s", ref->name);
2381 rc = -4;
2382 }
2383 new_refs++;
2384 continue;
2385 }
2386
2387 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2388 if (push_verbosely || 1)
2389 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2390 continue;
2391 }
2392
2393 if (!force_all &&
2394 !is_zero_sha1(ref->old_sha1) &&
2395 !ref->force) {
2396 if (!has_sha1_file(ref->old_sha1) ||
2397 !ref_newer(ref->peer_ref->new_sha1,
2398 ref->old_sha1)) {
2399 /*
2400 * We do not have the remote ref, or
2401 * we know that the remote ref is not
2402 * an ancestor of what we are trying to
2403 * push. Either way this can be losing
2404 * commits at the remote end and likely
2405 * we were not up to date to begin with.
2406 */
2407 error("remote '%s' is not an ancestor of\n"
2408 "local '%s'.\n"
2409 "Maybe you are not up-to-date and "
2410 "need to pull first?",
2411 ref->name,
2412 ref->peer_ref->name);
2413 rc = -2;
2414 continue;
2415 }
2416 }
2417 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2418 new_refs++;
2419 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2420 new_hex = sha1_to_hex(ref->new_sha1);
2421
2422 fprintf(stderr, "updating '%s'", ref->name);
2423 if (strcmp(ref->name, ref->peer_ref->name))
2424 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2425 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2426 if (dry_run)
2427 continue;
2428
2429 /* Lock remote branch ref */
2430 ref_lock = lock_remote(ref->name, LOCK_TIME);
2431 if (ref_lock == NULL) {
2432 fprintf(stderr, "Unable to lock remote branch %s\n",
2433 ref->name);
2434 rc = 1;
2435 continue;
2436 }
2437
2438 /* Set up revision info for this refspec */
2439 commit_argc = 3;
2440 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2441 old_sha1_hex = NULL;
2442 commit_argv[1] = "--objects";
2443 commit_argv[2] = new_sha1_hex;
2444 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2445 old_sha1_hex = xmalloc(42);
2446 sprintf(old_sha1_hex, "^%s",
2447 sha1_to_hex(ref->old_sha1));
2448 commit_argv[3] = old_sha1_hex;
2449 commit_argc++;
2450 }
2451 init_revisions(&revs, setup_git_directory());
2452 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2453 revs.edge_hint = 0; /* just in case */
2454 free(new_sha1_hex);
2455 if (old_sha1_hex) {
2456 free(old_sha1_hex);
2457 commit_argv[1] = NULL;
2458 }
2459
2460 /* Generate a list of objects that need to be pushed */
2461 pushing = 0;
2462 if (prepare_revision_walk(&revs))
2463 die("revision walk setup failed");
2464 mark_edges_uninteresting(revs.commits, &revs, NULL);
2465 objects_to_send = get_delta(&revs, ref_lock);
2466 finish_all_active_slots();
2467
2468 /* Push missing objects to remote, this would be a
2469 convenient time to pack them first if appropriate. */
2470 pushing = 1;
2471 if (objects_to_send)
2472 fprintf(stderr, " sending %d objects\n",
2473 objects_to_send);
2474
2475 run_request_queue();
2476
2477 /* Update the remote branch if all went well */
2478 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2479 rc = 1;
2480
2481 if (!rc)
2482 fprintf(stderr, " done\n");
2483 unlock_remote(ref_lock);
2484 check_locks();
2485 }
2486
2487 /* Update remote server info if appropriate */
2488 if (repo->has_info_refs && new_refs) {
2489 if (info_ref_lock && repo->can_update_info_refs) {
2490 fprintf(stderr, "Updating remote server info\n");
2491 if (!dry_run)
2492 update_remote_info_refs(info_ref_lock);
2493 } else {
2494 fprintf(stderr, "Unable to update server info\n");
2495 }
2496 }
2497
2498 cleanup:
2499 free(rewritten_url);
2500 if (info_ref_lock)
2501 unlock_remote(info_ref_lock);
2502 free(repo);
2503
2504 curl_slist_free_all(no_pragma_header);
2505
2506 http_cleanup();
2507
2508 request = request_queue_head;
2509 while (request != NULL) {
2510 next_request = request->next;
2511 release_request(request);
2512 request = next_request;
2513 }
2514
2515 return rc;
2516 }
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