-
Notifications
You must be signed in to change notification settings - Fork 3
/
http-push.c
2570 lines (2243 loc) · 66.5 KB
/
http-push.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include "cache.h"
#include "commit.h"
#include "pack.h"
#include "fetch.h"
#include "tag.h"
#include "blob.h"
#include "http.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
#include "exec_cmd.h"
#include <expat.h>
static const char http_push_usage[] =
"git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
#ifndef XML_STATUS_OK
enum XML_Status {
XML_STATUS_OK = 1,
XML_STATUS_ERROR = 0
};
#define XML_STATUS_OK 1
#define XML_STATUS_ERROR 0
#endif
#define PREV_BUF_SIZE 4096
#define RANGE_HEADER_SIZE 30
/* DAV methods */
#define DAV_LOCK "LOCK"
#define DAV_MKCOL "MKCOL"
#define DAV_MOVE "MOVE"
#define DAV_PROPFIND "PROPFIND"
#define DAV_PUT "PUT"
#define DAV_UNLOCK "UNLOCK"
#define DAV_DELETE "DELETE"
/* DAV lock flags */
#define DAV_PROP_LOCKWR (1u << 0)
#define DAV_PROP_LOCKEX (1u << 1)
#define DAV_LOCK_OK (1u << 2)
/* DAV XML properties */
#define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
#define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
#define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
#define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
#define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
#define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
#define DAV_PROPFIND_RESP ".multistatus.response"
#define DAV_PROPFIND_NAME ".multistatus.response.href"
#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
/* DAV request body templates */
#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>"
#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
#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>"
#define LOCK_TIME 600
#define LOCK_REFRESH 30
/* bits #0-15 in revision.h */
#define LOCAL (1u<<16)
#define REMOTE (1u<<17)
#define FETCHING (1u<<18)
#define PUSHING (1u<<19)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
static int pushing = 0;
static int aborted = 0;
static signed char remote_dir_exists[256];
static struct curl_slist *no_pragma_header;
static struct curl_slist *default_headers;
static int push_verbosely = 0;
static int push_all = 0;
static int force_all = 0;
static struct object_list *objects = NULL;
struct repo
{
char *url;
int path_len;
int has_info_refs;
int can_update_info_refs;
int has_info_packs;
struct packed_git *packs;
struct remote_lock *locks;
};
static struct repo *remote = NULL;
enum transfer_state {
NEED_FETCH,
RUN_FETCH_LOOSE,
RUN_FETCH_PACKED,
NEED_PUSH,
RUN_MKCOL,
RUN_PUT,
RUN_MOVE,
ABORTED,
COMPLETE,
};
struct transfer_request
{
struct object *obj;
char *url;
char *dest;
struct remote_lock *lock;
struct curl_slist *headers;
struct buffer buffer;
char filename[PATH_MAX];
char tmpfile[PATH_MAX];
int local_fileno;
FILE *local_stream;
enum transfer_state state;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
unsigned char real_sha1[20];
SHA_CTX c;
z_stream stream;
int zret;
int rename;
void *userData;
struct active_request_slot *slot;
struct transfer_request *next;
};
static struct transfer_request *request_queue_head = NULL;
struct xml_ctx
{
char *name;
int len;
char *cdata;
void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
void *userData;
};
struct remote_lock
{
char *url;
char *owner;
char *token;
time_t start_time;
long timeout;
int refreshing;
struct remote_lock *next;
};
/* Flags that control remote_ls processing */
#define PROCESS_FILES (1u << 0)
#define PROCESS_DIRS (1u << 1)
#define RECURSIVE (1u << 2)
/* Flags that remote_ls passes to callback functions */
#define IS_DIR (1u << 0)
struct remote_ls_ctx
{
char *path;
void (*userFunc)(struct remote_ls_ctx *ls);
void *userData;
int flags;
char *dentry_name;
int dentry_flags;
struct remote_ls_ctx *parent;
};
static void finish_request(struct transfer_request *request);
static void release_request(struct transfer_request *request);
static void process_response(void *callback_data)
{
struct transfer_request *request =
(struct transfer_request *)callback_data;
finish_request(request);
}
static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
void *data)
{
unsigned char expn[4096];
size_t size = eltsize * nmemb;
int posn = 0;
struct transfer_request *request = (struct transfer_request *)data;
do {
ssize_t retval = write(request->local_fileno,
ptr + posn, size - posn);
if (retval < 0)
return posn;
posn += retval;
} while (posn < size);
request->stream.avail_in = size;
request->stream.next_in = ptr;
do {
request->stream.next_out = expn;
request->stream.avail_out = sizeof(expn);
request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
SHA1_Update(&request->c, expn,
sizeof(expn) - request->stream.avail_out);
} while (request->stream.avail_in && request->zret == Z_OK);
data_received++;
return size;
}
static void start_fetch_loose(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
char *filename;
char prevfile[PATH_MAX];
char *url;
char *posn;
int prevlocal;
unsigned char prev_buf[PREV_BUF_SIZE];
ssize_t prev_read = 0;
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
struct active_request_slot *slot;
filename = sha1_file_name(request->obj->sha1);
snprintf(request->filename, sizeof(request->filename), "%s", filename);
snprintf(request->tmpfile, sizeof(request->tmpfile),
"%s.temp", filename);
snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
unlink(prevfile);
rename(request->tmpfile, prevfile);
unlink(request->tmpfile);
if (request->local_fileno != -1)
error("fd leakage in start: %d", request->local_fileno);
request->local_fileno = open(request->tmpfile,
O_WRONLY | O_CREAT | O_EXCL, 0666);
/* This could have failed due to the "lazy directory creation";
* try to mkdir the last path component.
*/
if (request->local_fileno < 0 && errno == ENOENT) {
char *dir = strrchr(request->tmpfile, '/');
if (dir) {
*dir = 0;
mkdir(request->tmpfile, 0777);
*dir = '/';
}
request->local_fileno = open(request->tmpfile,
O_WRONLY | O_CREAT | O_EXCL, 0666);
}
if (request->local_fileno < 0) {
request->state = ABORTED;
error("Couldn't create temporary file %s for %s: %s",
request->tmpfile, request->filename, strerror(errno));
return;
}
memset(&request->stream, 0, sizeof(request->stream));
inflateInit(&request->stream);
SHA1_Init(&request->c);
url = xmalloc(strlen(remote->url) + 50);
request->url = xmalloc(strlen(remote->url) + 50);
strcpy(url, remote->url);
posn = url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
strcpy(request->url, url);
/* If a previous temp file is present, process what was already
fetched. */
prevlocal = open(prevfile, O_RDONLY);
if (prevlocal != -1) {
do {
prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
if (prev_read>0) {
if (fwrite_sha1_file(prev_buf,
1,
prev_read,
request) == prev_read) {
prev_posn += prev_read;
} else {
prev_read = -1;
}
}
} while (prev_read > 0);
close(prevlocal);
}
unlink(prevfile);
/* Reset inflate/SHA1 if there was an error reading the previous temp
file; also rewind to the beginning of the local file. */
if (prev_read == -1) {
memset(&request->stream, 0, sizeof(request->stream));
inflateInit(&request->stream);
SHA1_Init(&request->c);
if (prev_posn>0) {
prev_posn = 0;
lseek(request->local_fileno, SEEK_SET, 0);
ftruncate(request->local_fileno, 0);
}
}
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
/* If we have successfully processed data from a previous fetch
attempt, only fetch the data we don't already have. */
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of object %s at byte %ld\n",
hex, prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl,
CURLOPT_HTTPHEADER, range_header);
}
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_LOOSE;
if (!start_active_slot(slot)) {
fprintf(stderr, "Unable to start GET request\n");
remote->can_update_info_refs = 0;
release_request(request);
}
}
static void start_fetch_packed(struct transfer_request *request)
{
char *url;
struct packed_git *target;
FILE *packfile;
char *filename;
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
struct transfer_request *check_request = request_queue_head;
struct active_request_slot *slot;
target = find_sha1_pack(request->obj->sha1, remote->packs);
if (!target) {
fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
remote->can_update_info_refs = 0;
release_request(request);
return;
}
fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
filename = sha1_pack_name(target->sha1);
snprintf(request->filename, sizeof(request->filename), "%s", filename);
snprintf(request->tmpfile, sizeof(request->tmpfile),
"%s.temp", filename);
url = xmalloc(strlen(remote->url) + 64);
sprintf(url, "%sobjects/pack/pack-%s.pack",
remote->url, sha1_to_hex(target->sha1));
/* Make sure there isn't another open request for this pack */
while (check_request) {
if (check_request->state == RUN_FETCH_PACKED &&
!strcmp(check_request->url, url)) {
free(url);
release_request(request);
return;
}
check_request = check_request->next;
}
packfile = fopen(request->tmpfile, "a");
if (!packfile) {
fprintf(stderr, "Unable to open local file %s for pack",
filename);
remote->can_update_info_refs = 0;
free(url);
return;
}
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
request->local_stream = packfile;
request->userData = target;
request->url = url;
curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
slot->local = packfile;
/* If there is data present from a previous transfer attempt,
resume where it left off */
prev_posn = ftell(packfile);
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of pack %s at byte %ld\n",
sha1_to_hex(target->sha1), prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
}
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_PACKED;
if (!start_active_slot(slot)) {
fprintf(stderr, "Unable to start GET request\n");
remote->can_update_info_refs = 0;
release_request(request);
}
}
static void start_mkcol(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
char *posn;
request->url = xmalloc(strlen(remote->url) + 13);
strcpy(request->url, remote->url);
posn = request->url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
strcpy(posn, "/");
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MKCOL;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static void start_put(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
char *posn;
char type[20];
char hdr[50];
void *unpacked;
unsigned long len;
int hdrlen;
ssize_t size;
z_stream stream;
unpacked = read_sha1_file(request->obj->sha1, type, &len);
hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
/* Set it up */
memset(&stream, 0, sizeof(stream));
deflateInit(&stream, Z_BEST_COMPRESSION);
size = deflateBound(&stream, len + hdrlen);
request->buffer.buffer = xmalloc(size);
/* Compress it */
stream.next_out = request->buffer.buffer;
stream.avail_out = size;
/* First header.. */
stream.next_in = (void *)hdr;
stream.avail_in = hdrlen;
while (deflate(&stream, 0) == Z_OK)
/* nothing */;
/* Then the data itself.. */
stream.next_in = unpacked;
stream.avail_in = len;
while (deflate(&stream, Z_FINISH) == Z_OK)
/* nothing */;
deflateEnd(&stream);
free(unpacked);
request->buffer.size = stream.total_out;
request->buffer.posn = 0;
request->url = xmalloc(strlen(remote->url) +
strlen(request->lock->token) + 51);
strcpy(request->url, remote->url);
posn = request->url + strlen(remote->url);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
request->dest = xmalloc(strlen(request->url) + 14);
sprintf(request->dest, "Destination: %s", request->url);
posn += 38;
*(posn++) = '.';
strcpy(posn, request->lock->token);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_PUT;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static void start_move(struct transfer_request *request)
{
struct active_request_slot *slot;
struct curl_slist *dav_headers = NULL;
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
dav_headers = curl_slist_append(dav_headers, request->dest);
dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MOVE;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static int refresh_lock(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
char *if_header;
char timeout_header[25];
struct curl_slist *dav_headers = NULL;
int rc = 0;
lock->refreshing = 1;
if_header = xmalloc(strlen(lock->token) + 25);
sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
dav_headers = curl_slist_append(dav_headers, if_header);
dav_headers = curl_slist_append(dav_headers, timeout_header);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
fprintf(stderr, "LOCK HTTP error %ld\n",
results.http_code);
} else {
lock->start_time = time(NULL);
rc = 1;
}
}
lock->refreshing = 0;
curl_slist_free_all(dav_headers);
free(if_header);
return rc;
}
static void check_locks(void)
{
struct remote_lock *lock = remote->locks;
time_t current_time = time(NULL);
int time_remaining;
while (lock) {
time_remaining = lock->start_time + lock->timeout -
current_time;
if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
if (!refresh_lock(lock)) {
fprintf(stderr,
"Unable to refresh lock for %s\n",
lock->url);
aborted = 1;
return;
}
}
lock = lock->next;
}
}
static void release_request(struct transfer_request *request)
{
struct transfer_request *entry = request_queue_head;
if (request == request_queue_head) {
request_queue_head = request->next;
} else {
while (entry->next != NULL && entry->next != request)
entry = entry->next;
if (entry->next == request)
entry->next = entry->next->next;
}
if (request->local_fileno != -1)
close(request->local_fileno);
if (request->local_stream)
fclose(request->local_stream);
if (request->url != NULL)
free(request->url);
free(request);
}
static void finish_request(struct transfer_request *request)
{
struct stat st;
struct packed_git *target;
struct packed_git **lst;
request->curl_result = request->slot->curl_result;
request->http_code = request->slot->http_code;
request->slot = NULL;
/* Keep locks active */
check_locks();
if (request->headers != NULL)
curl_slist_free_all(request->headers);
/* URL is reused for MOVE after PUT */
if (request->state != RUN_PUT) {
free(request->url);
request->url = NULL;
}
if (request->state == RUN_MKCOL) {
if (request->curl_result == CURLE_OK ||
request->http_code == 405) {
remote_dir_exists[request->obj->sha1[0]] = 1;
start_put(request);
} else {
fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_PUT) {
if (request->curl_result == CURLE_OK) {
start_move(request);
} else {
fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_MOVE) {
if (request->curl_result == CURLE_OK) {
if (push_verbosely)
fprintf(stderr, " sent %s\n",
sha1_to_hex(request->obj->sha1));
request->obj->flags |= REMOTE;
release_request(request);
} else {
fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_FETCH_LOOSE) {
fchmod(request->local_fileno, 0444);
close(request->local_fileno); request->local_fileno = -1;
if (request->curl_result != CURLE_OK &&
request->http_code != 416) {
if (stat(request->tmpfile, &st) == 0) {
if (st.st_size == 0)
unlink(request->tmpfile);
}
} else {
if (request->http_code == 416)
fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
inflateEnd(&request->stream);
SHA1_Final(request->real_sha1, &request->c);
if (request->zret != Z_STREAM_END) {
unlink(request->tmpfile);
} else if (memcmp(request->obj->sha1, request->real_sha1, 20)) {
unlink(request->tmpfile);
} else {
request->rename =
move_temp_to_file(
request->tmpfile,
request->filename);
if (request->rename == 0) {
request->obj->flags |= (LOCAL | REMOTE);
}
}
}
/* Try fetching packed if necessary */
if (request->obj->flags & LOCAL)
release_request(request);
else
start_fetch_packed(request);
} else if (request->state == RUN_FETCH_PACKED) {
if (request->curl_result != CURLE_OK) {
fprintf(stderr, "Unable to get pack file %s\n%s",
request->url, curl_errorstr);
remote->can_update_info_refs = 0;
} else {
fclose(request->local_stream);
request->local_stream = NULL;
if (!move_temp_to_file(request->tmpfile,
request->filename)) {
target = (struct packed_git *)request->userData;
lst = &remote->packs;
while (*lst != target)
lst = &((*lst)->next);
*lst = (*lst)->next;
if (!verify_pack(target, 0))
install_packed_git(target);
else
remote->can_update_info_refs = 0;
}
}
release_request(request);
}
}
void fill_active_slots(void)
{
struct transfer_request *request = request_queue_head;
struct transfer_request *next;
struct active_request_slot *slot = active_queue_head;
int num_transfers;
if (aborted)
return;
while (active_requests < max_requests && request != NULL) {
next = request->next;
if (request->state == NEED_FETCH) {
start_fetch_loose(request);
} else if (pushing && request->state == NEED_PUSH) {
if (remote_dir_exists[request->obj->sha1[0]] == 1) {
start_put(request);
} else {
start_mkcol(request);
}
curl_multi_perform(curlm, &num_transfers);
}
request = next;
}
while (slot != NULL) {
if (!slot->in_use && slot->curl != NULL) {
curl_easy_cleanup(slot->curl);
slot->curl = NULL;
}
slot = slot->next;
}
}
static void get_remote_object_list(unsigned char parent);
static void add_fetch_request(struct object *obj)
{
struct transfer_request *request;
check_locks();
/*
* Don't fetch the object if it's known to exist locally
* or is already in the request queue
*/
if (remote_dir_exists[obj->sha1[0]] == -1)
get_remote_object_list(obj->sha1[0]);
if (obj->flags & (LOCAL | FETCHING))
return;
obj->flags |= FETCHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = NULL;
request->headers = NULL;
request->local_fileno = -1;
request->local_stream = NULL;
request->state = NEED_FETCH;
request->next = request_queue_head;
request_queue_head = request;
fill_active_slots();
step_active_slots();
}
static int add_send_request(struct object *obj, struct remote_lock *lock)
{
struct transfer_request *request = request_queue_head;
struct packed_git *target;
/* Keep locks active */
check_locks();
/*
* Don't push the object if it's known to exist on the remote
* or is already in the request queue
*/
if (remote_dir_exists[obj->sha1[0]] == -1)
get_remote_object_list(obj->sha1[0]);
if (obj->flags & (REMOTE | PUSHING))
return 0;
target = find_sha1_pack(obj->sha1, remote->packs);
if (target) {
obj->flags |= REMOTE;
return 0;
}
obj->flags |= PUSHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = lock;
request->headers = NULL;
request->local_fileno = -1;
request->local_stream = NULL;
request->state = NEED_PUSH;
request->next = request_queue_head;
request_queue_head = request;
fill_active_slots();
step_active_slots();
return 1;
}
static int fetch_index(unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
char *filename;
char *url;
char tmpfile[PATH_MAX];
long prev_posn = 0;
char range[RANGE_HEADER_SIZE];
struct curl_slist *range_header = NULL;
FILE *indexfile;
struct active_request_slot *slot;
struct slot_results results;
/* Don't use the index if the pack isn't there */
url = xmalloc(strlen(remote->url) + 64);
sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
free(url);
return error("Unable to verify pack %s is available",
hex);
}
} else {
return error("Unable to start request");
}
if (has_pack_index(sha1))
return 0;
if (push_verbosely)
fprintf(stderr, "Getting index for pack %s\n", hex);
sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
filename = sha1_pack_index_name(sha1);
snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
indexfile = fopen(tmpfile, "a");
if (!indexfile)
return error("Unable to open local file %s for pack index",
filename);
slot = get_active_slot();
slot->results = &results;
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
curl_easy_setopt(slot->curl, CURLOPT_URL, url);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
slot->local = indexfile;
/* If there is data present from a previous transfer attempt,
resume where it left off */
prev_posn = ftell(indexfile);
if (prev_posn>0) {
if (push_verbosely)
fprintf(stderr,
"Resuming fetch of index for pack %s at byte %ld\n",
hex, prev_posn);
sprintf(range, "Range: bytes=%ld-", prev_posn);
range_header = curl_slist_append(range_header, range);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
}
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
free(url);
fclose(indexfile);
return error("Unable to get pack index %s\n%s", url,
curl_errorstr);
}
} else {
free(url);
fclose(indexfile);
return error("Unable to start request");
}
free(url);
fclose(indexfile);
return move_temp_to_file(tmpfile, filename);
}
static int setup_index(unsigned char *sha1)
{
struct packed_git *new_pack;
if (fetch_index(sha1))
return -1;
new_pack = parse_pack_index(sha1);
new_pack->next = remote->packs;
remote->packs = new_pack;
return 0;
}