71fbbb694fc78471343f568a5e93b8013a7bb9cb
[git/git.git] / remote-curl.c
1 #include "cache.h"
2 #include "remote.h"
3 #include "strbuf.h"
4 #include "walker.h"
5 #include "http.h"
6 #include "exec_cmd.h"
7 #include "run-command.h"
8 #include "pkt-line.h"
9 #include "string-list.h"
10 #include "sideband.h"
11 #include "argv-array.h"
12 #include "credential.h"
13 #include "sha1-array.h"
14 #include "send-pack.h"
15
16 static struct remote *remote;
17 /* always ends with a trailing slash */
18 static struct strbuf url = STRBUF_INIT;
19
20 struct options {
21 int verbosity;
22 unsigned long depth;
23 unsigned progress : 1,
24 check_self_contained_and_connected : 1,
25 cloning : 1,
26 update_shallow : 1,
27 followtags : 1,
28 dry_run : 1,
29 thin : 1,
30 /* One of the SEND_PACK_PUSH_CERT_* constants. */
31 push_cert : 2;
32 };
33 static struct options options;
34 static struct string_list cas_options = STRING_LIST_INIT_DUP;
35
36 static int set_option(const char *name, const char *value)
37 {
38 if (!strcmp(name, "verbosity")) {
39 char *end;
40 int v = strtol(value, &end, 10);
41 if (value == end || *end)
42 return -1;
43 options.verbosity = v;
44 return 0;
45 }
46 else if (!strcmp(name, "progress")) {
47 if (!strcmp(value, "true"))
48 options.progress = 1;
49 else if (!strcmp(value, "false"))
50 options.progress = 0;
51 else
52 return -1;
53 return 0;
54 }
55 else if (!strcmp(name, "depth")) {
56 char *end;
57 unsigned long v = strtoul(value, &end, 10);
58 if (value == end || *end)
59 return -1;
60 options.depth = v;
61 return 0;
62 }
63 else if (!strcmp(name, "followtags")) {
64 if (!strcmp(value, "true"))
65 options.followtags = 1;
66 else if (!strcmp(value, "false"))
67 options.followtags = 0;
68 else
69 return -1;
70 return 0;
71 }
72 else if (!strcmp(name, "dry-run")) {
73 if (!strcmp(value, "true"))
74 options.dry_run = 1;
75 else if (!strcmp(value, "false"))
76 options.dry_run = 0;
77 else
78 return -1;
79 return 0;
80 }
81 else if (!strcmp(name, "check-connectivity")) {
82 if (!strcmp(value, "true"))
83 options.check_self_contained_and_connected = 1;
84 else if (!strcmp(value, "false"))
85 options.check_self_contained_and_connected = 0;
86 else
87 return -1;
88 return 0;
89 }
90 else if (!strcmp(name, "cas")) {
91 struct strbuf val = STRBUF_INIT;
92 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
93 string_list_append(&cas_options, val.buf);
94 strbuf_release(&val);
95 return 0;
96 } else if (!strcmp(name, "cloning")) {
97 if (!strcmp(value, "true"))
98 options.cloning = 1;
99 else if (!strcmp(value, "false"))
100 options.cloning = 0;
101 else
102 return -1;
103 return 0;
104 } else if (!strcmp(name, "update-shallow")) {
105 if (!strcmp(value, "true"))
106 options.update_shallow = 1;
107 else if (!strcmp(value, "false"))
108 options.update_shallow = 0;
109 else
110 return -1;
111 return 0;
112 } else if (!strcmp(name, "pushcert")) {
113 if (!strcmp(value, "true"))
114 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
115 else if (!strcmp(value, "false"))
116 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
117 else if (!strcmp(value, "if-asked"))
118 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
119 else
120 return -1;
121 return 0;
122 } else {
123 return 1 /* unsupported */;
124 }
125 }
126
127 struct discovery {
128 const char *service;
129 char *buf_alloc;
130 char *buf;
131 size_t len;
132 struct ref *refs;
133 struct sha1_array shallow;
134 unsigned proto_git : 1;
135 };
136 static struct discovery *last_discovery;
137
138 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
139 {
140 struct ref *list = NULL;
141 get_remote_heads(-1, heads->buf, heads->len, &list,
142 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
143 return list;
144 }
145
146 static struct ref *parse_info_refs(struct discovery *heads)
147 {
148 char *data, *start, *mid;
149 char *ref_name;
150 int i = 0;
151
152 struct ref *refs = NULL;
153 struct ref *ref = NULL;
154 struct ref *last_ref = NULL;
155
156 data = heads->buf;
157 start = NULL;
158 mid = data;
159 while (i < heads->len) {
160 if (!start) {
161 start = &data[i];
162 }
163 if (data[i] == '\t')
164 mid = &data[i];
165 if (data[i] == '\n') {
166 if (mid - start != 40)
167 die("%sinfo/refs not valid: is this a git repository?",
168 url.buf);
169 data[i] = 0;
170 ref_name = mid + 1;
171 ref = xmalloc(sizeof(struct ref) +
172 strlen(ref_name) + 1);
173 memset(ref, 0, sizeof(struct ref));
174 strcpy(ref->name, ref_name);
175 get_sha1_hex(start, ref->old_sha1);
176 if (!refs)
177 refs = ref;
178 if (last_ref)
179 last_ref->next = ref;
180 last_ref = ref;
181 start = NULL;
182 }
183 i++;
184 }
185
186 ref = alloc_ref("HEAD");
187 if (!http_fetch_ref(url.buf, ref) &&
188 !resolve_remote_symref(ref, refs)) {
189 ref->next = refs;
190 refs = ref;
191 } else {
192 free(ref);
193 }
194
195 return refs;
196 }
197
198 static void free_discovery(struct discovery *d)
199 {
200 if (d) {
201 if (d == last_discovery)
202 last_discovery = NULL;
203 free(d->shallow.sha1);
204 free(d->buf_alloc);
205 free_refs(d->refs);
206 free(d);
207 }
208 }
209
210 static int show_http_message(struct strbuf *type, struct strbuf *charset,
211 struct strbuf *msg)
212 {
213 const char *p, *eol;
214
215 /*
216 * We only show text/plain parts, as other types are likely
217 * to be ugly to look at on the user's terminal.
218 */
219 if (strcmp(type->buf, "text/plain"))
220 return -1;
221 if (charset->len)
222 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
223
224 strbuf_trim(msg);
225 if (!msg->len)
226 return -1;
227
228 p = msg->buf;
229 do {
230 eol = strchrnul(p, '\n');
231 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
232 p = eol + 1;
233 } while(*eol);
234 return 0;
235 }
236
237 static struct discovery *discover_refs(const char *service, int for_push)
238 {
239 struct strbuf exp = STRBUF_INIT;
240 struct strbuf type = STRBUF_INIT;
241 struct strbuf charset = STRBUF_INIT;
242 struct strbuf buffer = STRBUF_INIT;
243 struct strbuf refs_url = STRBUF_INIT;
244 struct strbuf effective_url = STRBUF_INIT;
245 struct discovery *last = last_discovery;
246 int http_ret, maybe_smart = 0;
247 struct http_get_options options;
248
249 if (last && !strcmp(service, last->service))
250 return last;
251 free_discovery(last);
252
253 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
254 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
255 git_env_bool("GIT_SMART_HTTP", 1)) {
256 maybe_smart = 1;
257 if (!strchr(url.buf, '?'))
258 strbuf_addch(&refs_url, '?');
259 else
260 strbuf_addch(&refs_url, '&');
261 strbuf_addf(&refs_url, "service=%s", service);
262 }
263
264 memset(&options, 0, sizeof(options));
265 options.content_type = &type;
266 options.charset = &charset;
267 options.effective_url = &effective_url;
268 options.base_url = &url;
269 options.no_cache = 1;
270 options.keep_error = 1;
271
272 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
273 switch (http_ret) {
274 case HTTP_OK:
275 break;
276 case HTTP_MISSING_TARGET:
277 show_http_message(&type, &charset, &buffer);
278 die("repository '%s' not found", url.buf);
279 case HTTP_NOAUTH:
280 show_http_message(&type, &charset, &buffer);
281 die("Authentication failed for '%s'", url.buf);
282 default:
283 show_http_message(&type, &charset, &buffer);
284 die("unable to access '%s': %s", url.buf, curl_errorstr);
285 }
286
287 last= xcalloc(1, sizeof(*last_discovery));
288 last->service = service;
289 last->buf_alloc = strbuf_detach(&buffer, &last->len);
290 last->buf = last->buf_alloc;
291
292 strbuf_addf(&exp, "application/x-%s-advertisement", service);
293 if (maybe_smart &&
294 (5 <= last->len && last->buf[4] == '#') &&
295 !strbuf_cmp(&exp, &type)) {
296 char *line;
297
298 /*
299 * smart HTTP response; validate that the service
300 * pkt-line matches our request.
301 */
302 line = packet_read_line_buf(&last->buf, &last->len, NULL);
303
304 strbuf_reset(&exp);
305 strbuf_addf(&exp, "# service=%s", service);
306 if (strcmp(line, exp.buf))
307 die("invalid server response; got '%s'", line);
308 strbuf_release(&exp);
309
310 /* The header can include additional metadata lines, up
311 * until a packet flush marker. Ignore these now, but
312 * in the future we might start to scan them.
313 */
314 while (packet_read_line_buf(&last->buf, &last->len, NULL))
315 ;
316
317 last->proto_git = 1;
318 }
319
320 if (last->proto_git)
321 last->refs = parse_git_refs(last, for_push);
322 else
323 last->refs = parse_info_refs(last);
324
325 strbuf_release(&refs_url);
326 strbuf_release(&exp);
327 strbuf_release(&type);
328 strbuf_release(&charset);
329 strbuf_release(&effective_url);
330 strbuf_release(&buffer);
331 last_discovery = last;
332 return last;
333 }
334
335 static struct ref *get_refs(int for_push)
336 {
337 struct discovery *heads;
338
339 if (for_push)
340 heads = discover_refs("git-receive-pack", for_push);
341 else
342 heads = discover_refs("git-upload-pack", for_push);
343
344 return heads->refs;
345 }
346
347 static void output_refs(struct ref *refs)
348 {
349 struct ref *posn;
350 for (posn = refs; posn; posn = posn->next) {
351 if (posn->symref)
352 printf("@%s %s\n", posn->symref, posn->name);
353 else
354 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
355 }
356 printf("\n");
357 fflush(stdout);
358 }
359
360 struct rpc_state {
361 const char *service_name;
362 const char **argv;
363 struct strbuf *stdin_preamble;
364 char *service_url;
365 char *hdr_content_type;
366 char *hdr_accept;
367 char *buf;
368 size_t alloc;
369 size_t len;
370 size_t pos;
371 int in;
372 int out;
373 struct strbuf result;
374 unsigned gzip_request : 1;
375 unsigned initial_buffer : 1;
376 };
377
378 static size_t rpc_out(void *ptr, size_t eltsize,
379 size_t nmemb, void *buffer_)
380 {
381 size_t max = eltsize * nmemb;
382 struct rpc_state *rpc = buffer_;
383 size_t avail = rpc->len - rpc->pos;
384
385 if (!avail) {
386 rpc->initial_buffer = 0;
387 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
388 if (!avail)
389 return 0;
390 rpc->pos = 0;
391 rpc->len = avail;
392 }
393
394 if (max < avail)
395 avail = max;
396 memcpy(ptr, rpc->buf + rpc->pos, avail);
397 rpc->pos += avail;
398 return avail;
399 }
400
401 #ifndef NO_CURL_IOCTL
402 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
403 {
404 struct rpc_state *rpc = clientp;
405
406 switch (cmd) {
407 case CURLIOCMD_NOP:
408 return CURLIOE_OK;
409
410 case CURLIOCMD_RESTARTREAD:
411 if (rpc->initial_buffer) {
412 rpc->pos = 0;
413 return CURLIOE_OK;
414 }
415 error("unable to rewind rpc post data - try increasing http.postBuffer");
416 return CURLIOE_FAILRESTART;
417
418 default:
419 return CURLIOE_UNKNOWNCMD;
420 }
421 }
422 #endif
423
424 static size_t rpc_in(char *ptr, size_t eltsize,
425 size_t nmemb, void *buffer_)
426 {
427 size_t size = eltsize * nmemb;
428 struct rpc_state *rpc = buffer_;
429 write_or_die(rpc->in, ptr, size);
430 return size;
431 }
432
433 static int run_slot(struct active_request_slot *slot,
434 struct slot_results *results)
435 {
436 int err;
437 struct slot_results results_buf;
438
439 if (!results)
440 results = &results_buf;
441
442 err = run_one_slot(slot, results);
443
444 if (err != HTTP_OK && err != HTTP_REAUTH) {
445 error("RPC failed; result=%d, HTTP code = %ld",
446 results->curl_result, results->http_code);
447 }
448
449 return err;
450 }
451
452 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
453 {
454 struct active_request_slot *slot;
455 struct curl_slist *headers = NULL;
456 struct strbuf buf = STRBUF_INIT;
457 int err;
458
459 slot = get_active_slot();
460
461 headers = curl_slist_append(headers, rpc->hdr_content_type);
462 headers = curl_slist_append(headers, rpc->hdr_accept);
463
464 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
465 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
466 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
467 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
468 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
469 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
470 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
471 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
472 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
473
474 err = run_slot(slot, results);
475
476 curl_slist_free_all(headers);
477 strbuf_release(&buf);
478 return err;
479 }
480
481 static int post_rpc(struct rpc_state *rpc)
482 {
483 struct active_request_slot *slot;
484 struct curl_slist *headers = NULL;
485 int use_gzip = rpc->gzip_request;
486 char *gzip_body = NULL;
487 size_t gzip_size = 0;
488 int err, large_request = 0;
489 int needs_100_continue = 0;
490
491 /* Try to load the entire request, if we can fit it into the
492 * allocated buffer space we can use HTTP/1.0 and avoid the
493 * chunked encoding mess.
494 */
495 while (1) {
496 size_t left = rpc->alloc - rpc->len;
497 char *buf = rpc->buf + rpc->len;
498 int n;
499
500 if (left < LARGE_PACKET_MAX) {
501 large_request = 1;
502 use_gzip = 0;
503 break;
504 }
505
506 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
507 if (!n)
508 break;
509 rpc->len += n;
510 }
511
512 if (large_request) {
513 struct slot_results results;
514
515 do {
516 err = probe_rpc(rpc, &results);
517 if (err == HTTP_REAUTH)
518 credential_fill(&http_auth);
519 } while (err == HTTP_REAUTH);
520 if (err != HTTP_OK)
521 return -1;
522
523 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
524 needs_100_continue = 1;
525 }
526
527 headers = curl_slist_append(headers, rpc->hdr_content_type);
528 headers = curl_slist_append(headers, rpc->hdr_accept);
529 headers = curl_slist_append(headers, needs_100_continue ?
530 "Expect: 100-continue" : "Expect:");
531
532 retry:
533 slot = get_active_slot();
534
535 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
536 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
537 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
538 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
539
540 if (large_request) {
541 /* The request body is large and the size cannot be predicted.
542 * We must use chunked encoding to send it.
543 */
544 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
545 rpc->initial_buffer = 1;
546 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
547 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
548 #ifndef NO_CURL_IOCTL
549 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
550 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
551 #endif
552 if (options.verbosity > 1) {
553 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
554 fflush(stderr);
555 }
556
557 } else if (gzip_body) {
558 /*
559 * If we are looping to retry authentication, then the previous
560 * run will have set up the headers and gzip buffer already,
561 * and we just need to send it.
562 */
563 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
564 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
565
566 } else if (use_gzip && 1024 < rpc->len) {
567 /* The client backend isn't giving us compressed data so
568 * we can try to deflate it ourselves, this may save on.
569 * the transfer time.
570 */
571 git_zstream stream;
572 int ret;
573
574 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
575 gzip_size = git_deflate_bound(&stream, rpc->len);
576 gzip_body = xmalloc(gzip_size);
577
578 stream.next_in = (unsigned char *)rpc->buf;
579 stream.avail_in = rpc->len;
580 stream.next_out = (unsigned char *)gzip_body;
581 stream.avail_out = gzip_size;
582
583 ret = git_deflate(&stream, Z_FINISH);
584 if (ret != Z_STREAM_END)
585 die("cannot deflate request; zlib deflate error %d", ret);
586
587 ret = git_deflate_end_gently(&stream);
588 if (ret != Z_OK)
589 die("cannot deflate request; zlib end error %d", ret);
590
591 gzip_size = stream.total_out;
592
593 headers = curl_slist_append(headers, "Content-Encoding: gzip");
594 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
595 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
596
597 if (options.verbosity > 1) {
598 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
599 rpc->service_name,
600 (unsigned long)rpc->len, (unsigned long)gzip_size);
601 fflush(stderr);
602 }
603 } else {
604 /* We know the complete request size in advance, use the
605 * more normal Content-Length approach.
606 */
607 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
608 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
609 if (options.verbosity > 1) {
610 fprintf(stderr, "POST %s (%lu bytes)\n",
611 rpc->service_name, (unsigned long)rpc->len);
612 fflush(stderr);
613 }
614 }
615
616 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
617 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
618 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
619
620 err = run_slot(slot, NULL);
621 if (err == HTTP_REAUTH && !large_request) {
622 credential_fill(&http_auth);
623 goto retry;
624 }
625 if (err != HTTP_OK)
626 err = -1;
627
628 curl_slist_free_all(headers);
629 free(gzip_body);
630 return err;
631 }
632
633 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
634 {
635 const char *svc = rpc->service_name;
636 struct strbuf buf = STRBUF_INIT;
637 struct strbuf *preamble = rpc->stdin_preamble;
638 struct child_process client = CHILD_PROCESS_INIT;
639 int err = 0;
640
641 client.in = -1;
642 client.out = -1;
643 client.git_cmd = 1;
644 client.argv = rpc->argv;
645 if (start_command(&client))
646 exit(1);
647 if (preamble)
648 write_or_die(client.in, preamble->buf, preamble->len);
649 if (heads)
650 write_or_die(client.in, heads->buf, heads->len);
651
652 rpc->alloc = http_post_buffer;
653 rpc->buf = xmalloc(rpc->alloc);
654 rpc->in = client.in;
655 rpc->out = client.out;
656 strbuf_init(&rpc->result, 0);
657
658 strbuf_addf(&buf, "%s%s", url.buf, svc);
659 rpc->service_url = strbuf_detach(&buf, NULL);
660
661 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
662 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
663
664 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
665 rpc->hdr_accept = strbuf_detach(&buf, NULL);
666
667 while (!err) {
668 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
669 if (!n)
670 break;
671 rpc->pos = 0;
672 rpc->len = n;
673 err |= post_rpc(rpc);
674 }
675
676 close(client.in);
677 client.in = -1;
678 if (!err) {
679 strbuf_read(&rpc->result, client.out, 0);
680 } else {
681 char buf[4096];
682 for (;;)
683 if (xread(client.out, buf, sizeof(buf)) <= 0)
684 break;
685 }
686
687 close(client.out);
688 client.out = -1;
689
690 err |= finish_command(&client);
691 free(rpc->service_url);
692 free(rpc->hdr_content_type);
693 free(rpc->hdr_accept);
694 free(rpc->buf);
695 strbuf_release(&buf);
696 return err;
697 }
698
699 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
700 {
701 struct walker *walker;
702 char **targets = xmalloc(nr_heads * sizeof(char*));
703 int ret, i;
704
705 if (options.depth)
706 die("dumb http transport does not support --depth");
707 for (i = 0; i < nr_heads; i++)
708 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
709
710 walker = get_http_walker(url.buf);
711 walker->get_all = 1;
712 walker->get_tree = 1;
713 walker->get_history = 1;
714 walker->get_verbosely = options.verbosity >= 3;
715 walker->get_recover = 0;
716 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
717 walker_free(walker);
718
719 for (i = 0; i < nr_heads; i++)
720 free(targets[i]);
721 free(targets);
722
723 return ret ? error("fetch failed.") : 0;
724 }
725
726 static int fetch_git(struct discovery *heads,
727 int nr_heads, struct ref **to_fetch)
728 {
729 struct rpc_state rpc;
730 struct strbuf preamble = STRBUF_INIT;
731 char *depth_arg = NULL;
732 int argc = 0, i, err;
733 const char *argv[17];
734
735 argv[argc++] = "fetch-pack";
736 argv[argc++] = "--stateless-rpc";
737 argv[argc++] = "--stdin";
738 argv[argc++] = "--lock-pack";
739 if (options.followtags)
740 argv[argc++] = "--include-tag";
741 if (options.thin)
742 argv[argc++] = "--thin";
743 if (options.verbosity >= 3) {
744 argv[argc++] = "-v";
745 argv[argc++] = "-v";
746 }
747 if (options.check_self_contained_and_connected)
748 argv[argc++] = "--check-self-contained-and-connected";
749 if (options.cloning)
750 argv[argc++] = "--cloning";
751 if (options.update_shallow)
752 argv[argc++] = "--update-shallow";
753 if (!options.progress)
754 argv[argc++] = "--no-progress";
755 if (options.depth) {
756 struct strbuf buf = STRBUF_INIT;
757 strbuf_addf(&buf, "--depth=%lu", options.depth);
758 depth_arg = strbuf_detach(&buf, NULL);
759 argv[argc++] = depth_arg;
760 }
761 argv[argc++] = url.buf;
762 argv[argc++] = NULL;
763
764 for (i = 0; i < nr_heads; i++) {
765 struct ref *ref = to_fetch[i];
766 if (!*ref->name)
767 die("cannot fetch by sha1 over smart http");
768 packet_buf_write(&preamble, "%s %s\n",
769 sha1_to_hex(ref->old_sha1), ref->name);
770 }
771 packet_buf_flush(&preamble);
772
773 memset(&rpc, 0, sizeof(rpc));
774 rpc.service_name = "git-upload-pack",
775 rpc.argv = argv;
776 rpc.stdin_preamble = &preamble;
777 rpc.gzip_request = 1;
778
779 err = rpc_service(&rpc, heads);
780 if (rpc.result.len)
781 write_or_die(1, rpc.result.buf, rpc.result.len);
782 strbuf_release(&rpc.result);
783 strbuf_release(&preamble);
784 free(depth_arg);
785 return err;
786 }
787
788 static int fetch(int nr_heads, struct ref **to_fetch)
789 {
790 struct discovery *d = discover_refs("git-upload-pack", 0);
791 if (d->proto_git)
792 return fetch_git(d, nr_heads, to_fetch);
793 else
794 return fetch_dumb(nr_heads, to_fetch);
795 }
796
797 static void parse_fetch(struct strbuf *buf)
798 {
799 struct ref **to_fetch = NULL;
800 struct ref *list_head = NULL;
801 struct ref **list = &list_head;
802 int alloc_heads = 0, nr_heads = 0;
803
804 do {
805 const char *p;
806 if (skip_prefix(buf->buf, "fetch ", &p)) {
807 const char *name;
808 struct ref *ref;
809 unsigned char old_sha1[20];
810
811 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
812 die("protocol error: expected sha/ref, got %s'", p);
813 if (p[40] == ' ')
814 name = p + 41;
815 else if (!p[40])
816 name = "";
817 else
818 die("protocol error: expected sha/ref, got %s'", p);
819
820 ref = alloc_ref(name);
821 hashcpy(ref->old_sha1, old_sha1);
822
823 *list = ref;
824 list = &ref->next;
825
826 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
827 to_fetch[nr_heads++] = ref;
828 }
829 else
830 die("http transport does not support %s", buf->buf);
831
832 strbuf_reset(buf);
833 if (strbuf_getline(buf, stdin, '\n') == EOF)
834 return;
835 if (!*buf->buf)
836 break;
837 } while (1);
838
839 if (fetch(nr_heads, to_fetch))
840 exit(128); /* error already reported */
841 free_refs(list_head);
842 free(to_fetch);
843
844 printf("\n");
845 fflush(stdout);
846 strbuf_reset(buf);
847 }
848
849 static int push_dav(int nr_spec, char **specs)
850 {
851 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
852 int argc = 0, i;
853
854 argv[argc++] = "http-push";
855 argv[argc++] = "--helper-status";
856 if (options.dry_run)
857 argv[argc++] = "--dry-run";
858 if (options.verbosity > 1)
859 argv[argc++] = "--verbose";
860 argv[argc++] = url.buf;
861 for (i = 0; i < nr_spec; i++)
862 argv[argc++] = specs[i];
863 argv[argc++] = NULL;
864
865 if (run_command_v_opt(argv, RUN_GIT_CMD))
866 die("git-%s failed", argv[0]);
867 free(argv);
868 return 0;
869 }
870
871 static int push_git(struct discovery *heads, int nr_spec, char **specs)
872 {
873 struct rpc_state rpc;
874 int i, err;
875 struct argv_array args;
876 struct string_list_item *cas_option;
877 struct strbuf preamble = STRBUF_INIT;
878
879 argv_array_init(&args);
880 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
881 NULL);
882
883 if (options.thin)
884 argv_array_push(&args, "--thin");
885 if (options.dry_run)
886 argv_array_push(&args, "--dry-run");
887 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
888 argv_array_push(&args, "--signed=yes");
889 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
890 argv_array_push(&args, "--signed=if-asked");
891 if (options.verbosity == 0)
892 argv_array_push(&args, "--quiet");
893 else if (options.verbosity > 1)
894 argv_array_push(&args, "--verbose");
895 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
896 for_each_string_list_item(cas_option, &cas_options)
897 argv_array_push(&args, cas_option->string);
898 argv_array_push(&args, url.buf);
899
900 argv_array_push(&args, "--stdin");
901 for (i = 0; i < nr_spec; i++)
902 packet_buf_write(&preamble, "%s\n", specs[i]);
903 packet_buf_flush(&preamble);
904
905 memset(&rpc, 0, sizeof(rpc));
906 rpc.service_name = "git-receive-pack",
907 rpc.argv = args.argv;
908 rpc.stdin_preamble = &preamble;
909
910 err = rpc_service(&rpc, heads);
911 if (rpc.result.len)
912 write_or_die(1, rpc.result.buf, rpc.result.len);
913 strbuf_release(&rpc.result);
914 strbuf_release(&preamble);
915 argv_array_clear(&args);
916 return err;
917 }
918
919 static int push(int nr_spec, char **specs)
920 {
921 struct discovery *heads = discover_refs("git-receive-pack", 1);
922 int ret;
923
924 if (heads->proto_git)
925 ret = push_git(heads, nr_spec, specs);
926 else
927 ret = push_dav(nr_spec, specs);
928 free_discovery(heads);
929 return ret;
930 }
931
932 static void parse_push(struct strbuf *buf)
933 {
934 char **specs = NULL;
935 int alloc_spec = 0, nr_spec = 0, i, ret;
936
937 do {
938 if (starts_with(buf->buf, "push ")) {
939 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
940 specs[nr_spec++] = xstrdup(buf->buf + 5);
941 }
942 else
943 die("http transport does not support %s", buf->buf);
944
945 strbuf_reset(buf);
946 if (strbuf_getline(buf, stdin, '\n') == EOF)
947 goto free_specs;
948 if (!*buf->buf)
949 break;
950 } while (1);
951
952 ret = push(nr_spec, specs);
953 printf("\n");
954 fflush(stdout);
955
956 if (ret)
957 exit(128); /* error already reported */
958
959 free_specs:
960 for (i = 0; i < nr_spec; i++)
961 free(specs[i]);
962 free(specs);
963 }
964
965 int main(int argc, const char **argv)
966 {
967 struct strbuf buf = STRBUF_INIT;
968 int nongit;
969
970 git_setup_gettext();
971
972 git_extract_argv0_path(argv[0]);
973 setup_git_directory_gently(&nongit);
974 if (argc < 2) {
975 error("remote-curl: usage: git remote-curl <remote> [<url>]");
976 return 1;
977 }
978
979 options.verbosity = 1;
980 options.progress = !!isatty(2);
981 options.thin = 1;
982
983 remote = remote_get(argv[1]);
984
985 if (argc > 2) {
986 end_url_with_slash(&url, argv[2]);
987 } else {
988 end_url_with_slash(&url, remote->url[0]);
989 }
990
991 http_init(remote, url.buf, 0);
992
993 do {
994 const char *arg;
995
996 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
997 if (ferror(stdin))
998 error("remote-curl: error reading command stream from git");
999 return 1;
1000 }
1001 if (buf.len == 0)
1002 break;
1003 if (starts_with(buf.buf, "fetch ")) {
1004 if (nongit)
1005 die("remote-curl: fetch attempted without a local repo");
1006 parse_fetch(&buf);
1007
1008 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1009 int for_push = !!strstr(buf.buf + 4, "for-push");
1010 output_refs(get_refs(for_push));
1011
1012 } else if (starts_with(buf.buf, "push ")) {
1013 parse_push(&buf);
1014
1015 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1016 char *value = strchr(arg, ' ');
1017 int result;
1018
1019 if (value)
1020 *value++ = '\0';
1021 else
1022 value = "true";
1023
1024 result = set_option(arg, value);
1025 if (!result)
1026 printf("ok\n");
1027 else if (result < 0)
1028 printf("error invalid value\n");
1029 else
1030 printf("unsupported\n");
1031 fflush(stdout);
1032
1033 } else if (!strcmp(buf.buf, "capabilities")) {
1034 printf("fetch\n");
1035 printf("option\n");
1036 printf("push\n");
1037 printf("check-connectivity\n");
1038 printf("\n");
1039 fflush(stdout);
1040 } else {
1041 error("remote-curl: unknown command '%s' from git", buf.buf);
1042 return 1;
1043 }
1044 strbuf_reset(&buf);
1045 } while (1);
1046
1047 http_cleanup();
1048
1049 return 0;
1050 }