refname_is_safe(): correct docstring
[git.git] / remote-curl.c
blob28d9d1063880b9b7e6ec18ea18c18f77fb99ef32
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"
16 static struct remote *remote;
17 /* always ends with a trailing slash */
18 static struct strbuf url = STRBUF_INIT;
20 struct options {
21 int verbosity;
22 unsigned long depth;
23 char *deepen_since;
24 struct string_list deepen_not;
25 unsigned progress : 1,
26 check_self_contained_and_connected : 1,
27 cloning : 1,
28 update_shallow : 1,
29 followtags : 1,
30 dry_run : 1,
31 thin : 1,
32 /* One of the SEND_PACK_PUSH_CERT_* constants. */
33 push_cert : 2,
34 deepen_relative : 1;
36 static struct options options;
37 static struct string_list cas_options = STRING_LIST_INIT_DUP;
39 static int set_option(const char *name, const char *value)
41 if (!strcmp(name, "verbosity")) {
42 char *end;
43 int v = strtol(value, &end, 10);
44 if (value == end || *end)
45 return -1;
46 options.verbosity = v;
47 return 0;
49 else if (!strcmp(name, "progress")) {
50 if (!strcmp(value, "true"))
51 options.progress = 1;
52 else if (!strcmp(value, "false"))
53 options.progress = 0;
54 else
55 return -1;
56 return 0;
58 else if (!strcmp(name, "depth")) {
59 char *end;
60 unsigned long v = strtoul(value, &end, 10);
61 if (value == end || *end)
62 return -1;
63 options.depth = v;
64 return 0;
66 else if (!strcmp(name, "deepen-since")) {
67 options.deepen_since = xstrdup(value);
68 return 0;
70 else if (!strcmp(name, "deepen-not")) {
71 string_list_append(&options.deepen_not, value);
72 return 0;
74 else if (!strcmp(name, "deepen-relative")) {
75 if (!strcmp(value, "true"))
76 options.deepen_relative = 1;
77 else if (!strcmp(value, "false"))
78 options.deepen_relative = 0;
79 else
80 return -1;
81 return 0;
83 else if (!strcmp(name, "followtags")) {
84 if (!strcmp(value, "true"))
85 options.followtags = 1;
86 else if (!strcmp(value, "false"))
87 options.followtags = 0;
88 else
89 return -1;
90 return 0;
92 else if (!strcmp(name, "dry-run")) {
93 if (!strcmp(value, "true"))
94 options.dry_run = 1;
95 else if (!strcmp(value, "false"))
96 options.dry_run = 0;
97 else
98 return -1;
99 return 0;
101 else if (!strcmp(name, "check-connectivity")) {
102 if (!strcmp(value, "true"))
103 options.check_self_contained_and_connected = 1;
104 else if (!strcmp(value, "false"))
105 options.check_self_contained_and_connected = 0;
106 else
107 return -1;
108 return 0;
110 else if (!strcmp(name, "cas")) {
111 struct strbuf val = STRBUF_INIT;
112 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
113 string_list_append(&cas_options, val.buf);
114 strbuf_release(&val);
115 return 0;
116 } else if (!strcmp(name, "cloning")) {
117 if (!strcmp(value, "true"))
118 options.cloning = 1;
119 else if (!strcmp(value, "false"))
120 options.cloning = 0;
121 else
122 return -1;
123 return 0;
124 } else if (!strcmp(name, "update-shallow")) {
125 if (!strcmp(value, "true"))
126 options.update_shallow = 1;
127 else if (!strcmp(value, "false"))
128 options.update_shallow = 0;
129 else
130 return -1;
131 return 0;
132 } else if (!strcmp(name, "pushcert")) {
133 if (!strcmp(value, "true"))
134 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
135 else if (!strcmp(value, "false"))
136 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
137 else if (!strcmp(value, "if-asked"))
138 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
139 else
140 return -1;
141 return 0;
143 #if LIBCURL_VERSION_NUM >= 0x070a08
144 } else if (!strcmp(name, "family")) {
145 if (!strcmp(value, "ipv4"))
146 git_curl_ipresolve = CURL_IPRESOLVE_V4;
147 else if (!strcmp(value, "ipv6"))
148 git_curl_ipresolve = CURL_IPRESOLVE_V6;
149 else if (!strcmp(value, "all"))
150 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
151 else
152 return -1;
153 return 0;
154 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
155 } else {
156 return 1 /* unsupported */;
160 struct discovery {
161 const char *service;
162 char *buf_alloc;
163 char *buf;
164 size_t len;
165 struct ref *refs;
166 struct sha1_array shallow;
167 unsigned proto_git : 1;
169 static struct discovery *last_discovery;
171 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
173 struct ref *list = NULL;
174 get_remote_heads(-1, heads->buf, heads->len, &list,
175 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
176 return list;
179 static struct ref *parse_info_refs(struct discovery *heads)
181 char *data, *start, *mid;
182 char *ref_name;
183 int i = 0;
185 struct ref *refs = NULL;
186 struct ref *ref = NULL;
187 struct ref *last_ref = NULL;
189 data = heads->buf;
190 start = NULL;
191 mid = data;
192 while (i < heads->len) {
193 if (!start) {
194 start = &data[i];
196 if (data[i] == '\t')
197 mid = &data[i];
198 if (data[i] == '\n') {
199 if (mid - start != 40)
200 die("%sinfo/refs not valid: is this a git repository?",
201 url.buf);
202 data[i] = 0;
203 ref_name = mid + 1;
204 ref = alloc_ref(ref_name);
205 get_oid_hex(start, &ref->old_oid);
206 if (!refs)
207 refs = ref;
208 if (last_ref)
209 last_ref->next = ref;
210 last_ref = ref;
211 start = NULL;
213 i++;
216 ref = alloc_ref("HEAD");
217 if (!http_fetch_ref(url.buf, ref) &&
218 !resolve_remote_symref(ref, refs)) {
219 ref->next = refs;
220 refs = ref;
221 } else {
222 free(ref);
225 return refs;
228 static void free_discovery(struct discovery *d)
230 if (d) {
231 if (d == last_discovery)
232 last_discovery = NULL;
233 free(d->shallow.sha1);
234 free(d->buf_alloc);
235 free_refs(d->refs);
236 free(d);
240 static int show_http_message(struct strbuf *type, struct strbuf *charset,
241 struct strbuf *msg)
243 const char *p, *eol;
246 * We only show text/plain parts, as other types are likely
247 * to be ugly to look at on the user's terminal.
249 if (strcmp(type->buf, "text/plain"))
250 return -1;
251 if (charset->len)
252 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
254 strbuf_trim(msg);
255 if (!msg->len)
256 return -1;
258 p = msg->buf;
259 do {
260 eol = strchrnul(p, '\n');
261 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
262 p = eol + 1;
263 } while(*eol);
264 return 0;
267 static struct discovery *discover_refs(const char *service, int for_push)
269 struct strbuf exp = STRBUF_INIT;
270 struct strbuf type = STRBUF_INIT;
271 struct strbuf charset = STRBUF_INIT;
272 struct strbuf buffer = STRBUF_INIT;
273 struct strbuf refs_url = STRBUF_INIT;
274 struct strbuf effective_url = STRBUF_INIT;
275 struct discovery *last = last_discovery;
276 int http_ret, maybe_smart = 0;
277 struct http_get_options http_options;
279 if (last && !strcmp(service, last->service))
280 return last;
281 free_discovery(last);
283 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
284 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
285 git_env_bool("GIT_SMART_HTTP", 1)) {
286 maybe_smart = 1;
287 if (!strchr(url.buf, '?'))
288 strbuf_addch(&refs_url, '?');
289 else
290 strbuf_addch(&refs_url, '&');
291 strbuf_addf(&refs_url, "service=%s", service);
294 memset(&http_options, 0, sizeof(http_options));
295 http_options.content_type = &type;
296 http_options.charset = &charset;
297 http_options.effective_url = &effective_url;
298 http_options.base_url = &url;
299 http_options.initial_request = 1;
300 http_options.no_cache = 1;
301 http_options.keep_error = 1;
303 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
304 switch (http_ret) {
305 case HTTP_OK:
306 break;
307 case HTTP_MISSING_TARGET:
308 show_http_message(&type, &charset, &buffer);
309 die("repository '%s' not found", url.buf);
310 case HTTP_NOAUTH:
311 show_http_message(&type, &charset, &buffer);
312 die("Authentication failed for '%s'", url.buf);
313 default:
314 show_http_message(&type, &charset, &buffer);
315 die("unable to access '%s': %s", url.buf, curl_errorstr);
318 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
319 warning(_("redirecting to %s"), url.buf);
321 last= xcalloc(1, sizeof(*last_discovery));
322 last->service = service;
323 last->buf_alloc = strbuf_detach(&buffer, &last->len);
324 last->buf = last->buf_alloc;
326 strbuf_addf(&exp, "application/x-%s-advertisement", service);
327 if (maybe_smart &&
328 (5 <= last->len && last->buf[4] == '#') &&
329 !strbuf_cmp(&exp, &type)) {
330 char *line;
333 * smart HTTP response; validate that the service
334 * pkt-line matches our request.
336 line = packet_read_line_buf(&last->buf, &last->len, NULL);
338 strbuf_reset(&exp);
339 strbuf_addf(&exp, "# service=%s", service);
340 if (strcmp(line, exp.buf))
341 die("invalid server response; got '%s'", line);
342 strbuf_release(&exp);
344 /* The header can include additional metadata lines, up
345 * until a packet flush marker. Ignore these now, but
346 * in the future we might start to scan them.
348 while (packet_read_line_buf(&last->buf, &last->len, NULL))
351 last->proto_git = 1;
354 if (last->proto_git)
355 last->refs = parse_git_refs(last, for_push);
356 else
357 last->refs = parse_info_refs(last);
359 strbuf_release(&refs_url);
360 strbuf_release(&exp);
361 strbuf_release(&type);
362 strbuf_release(&charset);
363 strbuf_release(&effective_url);
364 strbuf_release(&buffer);
365 last_discovery = last;
366 return last;
369 static struct ref *get_refs(int for_push)
371 struct discovery *heads;
373 if (for_push)
374 heads = discover_refs("git-receive-pack", for_push);
375 else
376 heads = discover_refs("git-upload-pack", for_push);
378 return heads->refs;
381 static void output_refs(struct ref *refs)
383 struct ref *posn;
384 for (posn = refs; posn; posn = posn->next) {
385 if (posn->symref)
386 printf("@%s %s\n", posn->symref, posn->name);
387 else
388 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
390 printf("\n");
391 fflush(stdout);
394 struct rpc_state {
395 const char *service_name;
396 const char **argv;
397 struct strbuf *stdin_preamble;
398 char *service_url;
399 char *hdr_content_type;
400 char *hdr_accept;
401 char *buf;
402 size_t alloc;
403 size_t len;
404 size_t pos;
405 int in;
406 int out;
407 struct strbuf result;
408 unsigned gzip_request : 1;
409 unsigned initial_buffer : 1;
412 static size_t rpc_out(void *ptr, size_t eltsize,
413 size_t nmemb, void *buffer_)
415 size_t max = eltsize * nmemb;
416 struct rpc_state *rpc = buffer_;
417 size_t avail = rpc->len - rpc->pos;
419 if (!avail) {
420 rpc->initial_buffer = 0;
421 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
422 if (!avail)
423 return 0;
424 rpc->pos = 0;
425 rpc->len = avail;
428 if (max < avail)
429 avail = max;
430 memcpy(ptr, rpc->buf + rpc->pos, avail);
431 rpc->pos += avail;
432 return avail;
435 #ifndef NO_CURL_IOCTL
436 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
438 struct rpc_state *rpc = clientp;
440 switch (cmd) {
441 case CURLIOCMD_NOP:
442 return CURLIOE_OK;
444 case CURLIOCMD_RESTARTREAD:
445 if (rpc->initial_buffer) {
446 rpc->pos = 0;
447 return CURLIOE_OK;
449 error("unable to rewind rpc post data - try increasing http.postBuffer");
450 return CURLIOE_FAILRESTART;
452 default:
453 return CURLIOE_UNKNOWNCMD;
456 #endif
458 static size_t rpc_in(char *ptr, size_t eltsize,
459 size_t nmemb, void *buffer_)
461 size_t size = eltsize * nmemb;
462 struct rpc_state *rpc = buffer_;
463 write_or_die(rpc->in, ptr, size);
464 return size;
467 static int run_slot(struct active_request_slot *slot,
468 struct slot_results *results)
470 int err;
471 struct slot_results results_buf;
473 if (!results)
474 results = &results_buf;
476 err = run_one_slot(slot, results);
478 if (err != HTTP_OK && err != HTTP_REAUTH) {
479 struct strbuf msg = STRBUF_INIT;
480 if (results->http_code && results->http_code != 200)
481 strbuf_addf(&msg, "HTTP %ld", results->http_code);
482 if (results->curl_result != CURLE_OK) {
483 if (msg.len)
484 strbuf_addch(&msg, ' ');
485 strbuf_addf(&msg, "curl %d", results->curl_result);
486 if (curl_errorstr[0]) {
487 strbuf_addch(&msg, ' ');
488 strbuf_addstr(&msg, curl_errorstr);
491 error("RPC failed; %s", msg.buf);
492 strbuf_release(&msg);
495 return err;
498 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
500 struct active_request_slot *slot;
501 struct curl_slist *headers = http_copy_default_headers();
502 struct strbuf buf = STRBUF_INIT;
503 int err;
505 slot = get_active_slot();
507 headers = curl_slist_append(headers, rpc->hdr_content_type);
508 headers = curl_slist_append(headers, rpc->hdr_accept);
510 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
511 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
512 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
513 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
514 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
515 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
516 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
517 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
518 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
520 err = run_slot(slot, results);
522 curl_slist_free_all(headers);
523 strbuf_release(&buf);
524 return err;
527 static int post_rpc(struct rpc_state *rpc)
529 struct active_request_slot *slot;
530 struct curl_slist *headers = http_copy_default_headers();
531 int use_gzip = rpc->gzip_request;
532 char *gzip_body = NULL;
533 size_t gzip_size = 0;
534 int err, large_request = 0;
535 int needs_100_continue = 0;
537 /* Try to load the entire request, if we can fit it into the
538 * allocated buffer space we can use HTTP/1.0 and avoid the
539 * chunked encoding mess.
541 while (1) {
542 size_t left = rpc->alloc - rpc->len;
543 char *buf = rpc->buf + rpc->len;
544 int n;
546 if (left < LARGE_PACKET_MAX) {
547 large_request = 1;
548 use_gzip = 0;
549 break;
552 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
553 if (!n)
554 break;
555 rpc->len += n;
558 if (large_request) {
559 struct slot_results results;
561 do {
562 err = probe_rpc(rpc, &results);
563 if (err == HTTP_REAUTH)
564 credential_fill(&http_auth);
565 } while (err == HTTP_REAUTH);
566 if (err != HTTP_OK)
567 return -1;
569 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
570 needs_100_continue = 1;
573 headers = curl_slist_append(headers, rpc->hdr_content_type);
574 headers = curl_slist_append(headers, rpc->hdr_accept);
575 headers = curl_slist_append(headers, needs_100_continue ?
576 "Expect: 100-continue" : "Expect:");
578 retry:
579 slot = get_active_slot();
581 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
582 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
583 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
584 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
586 if (large_request) {
587 /* The request body is large and the size cannot be predicted.
588 * We must use chunked encoding to send it.
590 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
591 rpc->initial_buffer = 1;
592 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
593 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
594 #ifndef NO_CURL_IOCTL
595 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
596 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
597 #endif
598 if (options.verbosity > 1) {
599 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
600 fflush(stderr);
603 } else if (gzip_body) {
605 * If we are looping to retry authentication, then the previous
606 * run will have set up the headers and gzip buffer already,
607 * and we just need to send it.
609 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
610 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
612 } else if (use_gzip && 1024 < rpc->len) {
613 /* The client backend isn't giving us compressed data so
614 * we can try to deflate it ourselves, this may save on.
615 * the transfer time.
617 git_zstream stream;
618 int ret;
620 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
621 gzip_size = git_deflate_bound(&stream, rpc->len);
622 gzip_body = xmalloc(gzip_size);
624 stream.next_in = (unsigned char *)rpc->buf;
625 stream.avail_in = rpc->len;
626 stream.next_out = (unsigned char *)gzip_body;
627 stream.avail_out = gzip_size;
629 ret = git_deflate(&stream, Z_FINISH);
630 if (ret != Z_STREAM_END)
631 die("cannot deflate request; zlib deflate error %d", ret);
633 ret = git_deflate_end_gently(&stream);
634 if (ret != Z_OK)
635 die("cannot deflate request; zlib end error %d", ret);
637 gzip_size = stream.total_out;
639 headers = curl_slist_append(headers, "Content-Encoding: gzip");
640 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
641 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
643 if (options.verbosity > 1) {
644 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
645 rpc->service_name,
646 (unsigned long)rpc->len, (unsigned long)gzip_size);
647 fflush(stderr);
649 } else {
650 /* We know the complete request size in advance, use the
651 * more normal Content-Length approach.
653 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
654 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
655 if (options.verbosity > 1) {
656 fprintf(stderr, "POST %s (%lu bytes)\n",
657 rpc->service_name, (unsigned long)rpc->len);
658 fflush(stderr);
662 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
663 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
664 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
666 err = run_slot(slot, NULL);
667 if (err == HTTP_REAUTH && !large_request) {
668 credential_fill(&http_auth);
669 goto retry;
671 if (err != HTTP_OK)
672 err = -1;
674 curl_slist_free_all(headers);
675 free(gzip_body);
676 return err;
679 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
681 const char *svc = rpc->service_name;
682 struct strbuf buf = STRBUF_INIT;
683 struct strbuf *preamble = rpc->stdin_preamble;
684 struct child_process client = CHILD_PROCESS_INIT;
685 int err = 0;
687 client.in = -1;
688 client.out = -1;
689 client.git_cmd = 1;
690 client.argv = rpc->argv;
691 if (start_command(&client))
692 exit(1);
693 if (preamble)
694 write_or_die(client.in, preamble->buf, preamble->len);
695 if (heads)
696 write_or_die(client.in, heads->buf, heads->len);
698 rpc->alloc = http_post_buffer;
699 rpc->buf = xmalloc(rpc->alloc);
700 rpc->in = client.in;
701 rpc->out = client.out;
702 strbuf_init(&rpc->result, 0);
704 strbuf_addf(&buf, "%s%s", url.buf, svc);
705 rpc->service_url = strbuf_detach(&buf, NULL);
707 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
708 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
710 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
711 rpc->hdr_accept = strbuf_detach(&buf, NULL);
713 while (!err) {
714 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
715 if (!n)
716 break;
717 rpc->pos = 0;
718 rpc->len = n;
719 err |= post_rpc(rpc);
722 close(client.in);
723 client.in = -1;
724 if (!err) {
725 strbuf_read(&rpc->result, client.out, 0);
726 } else {
727 char buf[4096];
728 for (;;)
729 if (xread(client.out, buf, sizeof(buf)) <= 0)
730 break;
733 close(client.out);
734 client.out = -1;
736 err |= finish_command(&client);
737 free(rpc->service_url);
738 free(rpc->hdr_content_type);
739 free(rpc->hdr_accept);
740 free(rpc->buf);
741 strbuf_release(&buf);
742 return err;
745 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
747 struct walker *walker;
748 char **targets;
749 int ret, i;
751 ALLOC_ARRAY(targets, nr_heads);
752 if (options.depth || options.deepen_since)
753 die("dumb http transport does not support shallow capabilities");
754 for (i = 0; i < nr_heads; i++)
755 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
757 walker = get_http_walker(url.buf);
758 walker->get_all = 1;
759 walker->get_tree = 1;
760 walker->get_history = 1;
761 walker->get_verbosely = options.verbosity >= 3;
762 walker->get_recover = 0;
763 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
764 walker_free(walker);
766 for (i = 0; i < nr_heads; i++)
767 free(targets[i]);
768 free(targets);
770 return ret ? error("fetch failed.") : 0;
773 static int fetch_git(struct discovery *heads,
774 int nr_heads, struct ref **to_fetch)
776 struct rpc_state rpc;
777 struct strbuf preamble = STRBUF_INIT;
778 int i, err;
779 struct argv_array args = ARGV_ARRAY_INIT;
781 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
782 "--stdin", "--lock-pack", NULL);
783 if (options.followtags)
784 argv_array_push(&args, "--include-tag");
785 if (options.thin)
786 argv_array_push(&args, "--thin");
787 if (options.verbosity >= 3)
788 argv_array_pushl(&args, "-v", "-v", NULL);
789 if (options.check_self_contained_and_connected)
790 argv_array_push(&args, "--check-self-contained-and-connected");
791 if (options.cloning)
792 argv_array_push(&args, "--cloning");
793 if (options.update_shallow)
794 argv_array_push(&args, "--update-shallow");
795 if (!options.progress)
796 argv_array_push(&args, "--no-progress");
797 if (options.depth)
798 argv_array_pushf(&args, "--depth=%lu", options.depth);
799 if (options.deepen_since)
800 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
801 for (i = 0; i < options.deepen_not.nr; i++)
802 argv_array_pushf(&args, "--shallow-exclude=%s",
803 options.deepen_not.items[i].string);
804 if (options.deepen_relative && options.depth)
805 argv_array_push(&args, "--deepen-relative");
806 argv_array_push(&args, url.buf);
808 for (i = 0; i < nr_heads; i++) {
809 struct ref *ref = to_fetch[i];
810 if (!*ref->name)
811 die("cannot fetch by sha1 over smart http");
812 packet_buf_write(&preamble, "%s %s\n",
813 oid_to_hex(&ref->old_oid), ref->name);
815 packet_buf_flush(&preamble);
817 memset(&rpc, 0, sizeof(rpc));
818 rpc.service_name = "git-upload-pack",
819 rpc.argv = args.argv;
820 rpc.stdin_preamble = &preamble;
821 rpc.gzip_request = 1;
823 err = rpc_service(&rpc, heads);
824 if (rpc.result.len)
825 write_or_die(1, rpc.result.buf, rpc.result.len);
826 strbuf_release(&rpc.result);
827 strbuf_release(&preamble);
828 argv_array_clear(&args);
829 return err;
832 static int fetch(int nr_heads, struct ref **to_fetch)
834 struct discovery *d = discover_refs("git-upload-pack", 0);
835 if (d->proto_git)
836 return fetch_git(d, nr_heads, to_fetch);
837 else
838 return fetch_dumb(nr_heads, to_fetch);
841 static void parse_fetch(struct strbuf *buf)
843 struct ref **to_fetch = NULL;
844 struct ref *list_head = NULL;
845 struct ref **list = &list_head;
846 int alloc_heads = 0, nr_heads = 0;
848 do {
849 const char *p;
850 if (skip_prefix(buf->buf, "fetch ", &p)) {
851 const char *name;
852 struct ref *ref;
853 struct object_id old_oid;
855 if (get_oid_hex(p, &old_oid))
856 die("protocol error: expected sha/ref, got %s'", p);
857 if (p[GIT_SHA1_HEXSZ] == ' ')
858 name = p + GIT_SHA1_HEXSZ + 1;
859 else if (!p[GIT_SHA1_HEXSZ])
860 name = "";
861 else
862 die("protocol error: expected sha/ref, got %s'", p);
864 ref = alloc_ref(name);
865 oidcpy(&ref->old_oid, &old_oid);
867 *list = ref;
868 list = &ref->next;
870 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
871 to_fetch[nr_heads++] = ref;
873 else
874 die("http transport does not support %s", buf->buf);
876 strbuf_reset(buf);
877 if (strbuf_getline_lf(buf, stdin) == EOF)
878 return;
879 if (!*buf->buf)
880 break;
881 } while (1);
883 if (fetch(nr_heads, to_fetch))
884 exit(128); /* error already reported */
885 free_refs(list_head);
886 free(to_fetch);
888 printf("\n");
889 fflush(stdout);
890 strbuf_reset(buf);
893 static int push_dav(int nr_spec, char **specs)
895 struct child_process child = CHILD_PROCESS_INIT;
896 size_t i;
898 child.git_cmd = 1;
899 argv_array_push(&child.args, "http-push");
900 argv_array_push(&child.args, "--helper-status");
901 if (options.dry_run)
902 argv_array_push(&child.args, "--dry-run");
903 if (options.verbosity > 1)
904 argv_array_push(&child.args, "--verbose");
905 argv_array_push(&child.args, url.buf);
906 for (i = 0; i < nr_spec; i++)
907 argv_array_push(&child.args, specs[i]);
909 if (run_command(&child))
910 die("git-http-push failed");
911 return 0;
914 static int push_git(struct discovery *heads, int nr_spec, char **specs)
916 struct rpc_state rpc;
917 int i, err;
918 struct argv_array args;
919 struct string_list_item *cas_option;
920 struct strbuf preamble = STRBUF_INIT;
922 argv_array_init(&args);
923 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
924 NULL);
926 if (options.thin)
927 argv_array_push(&args, "--thin");
928 if (options.dry_run)
929 argv_array_push(&args, "--dry-run");
930 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
931 argv_array_push(&args, "--signed=yes");
932 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
933 argv_array_push(&args, "--signed=if-asked");
934 if (options.verbosity == 0)
935 argv_array_push(&args, "--quiet");
936 else if (options.verbosity > 1)
937 argv_array_push(&args, "--verbose");
938 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
939 for_each_string_list_item(cas_option, &cas_options)
940 argv_array_push(&args, cas_option->string);
941 argv_array_push(&args, url.buf);
943 argv_array_push(&args, "--stdin");
944 for (i = 0; i < nr_spec; i++)
945 packet_buf_write(&preamble, "%s\n", specs[i]);
946 packet_buf_flush(&preamble);
948 memset(&rpc, 0, sizeof(rpc));
949 rpc.service_name = "git-receive-pack",
950 rpc.argv = args.argv;
951 rpc.stdin_preamble = &preamble;
953 err = rpc_service(&rpc, heads);
954 if (rpc.result.len)
955 write_or_die(1, rpc.result.buf, rpc.result.len);
956 strbuf_release(&rpc.result);
957 strbuf_release(&preamble);
958 argv_array_clear(&args);
959 return err;
962 static int push(int nr_spec, char **specs)
964 struct discovery *heads = discover_refs("git-receive-pack", 1);
965 int ret;
967 if (heads->proto_git)
968 ret = push_git(heads, nr_spec, specs);
969 else
970 ret = push_dav(nr_spec, specs);
971 free_discovery(heads);
972 return ret;
975 static void parse_push(struct strbuf *buf)
977 char **specs = NULL;
978 int alloc_spec = 0, nr_spec = 0, i, ret;
980 do {
981 if (starts_with(buf->buf, "push ")) {
982 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
983 specs[nr_spec++] = xstrdup(buf->buf + 5);
985 else
986 die("http transport does not support %s", buf->buf);
988 strbuf_reset(buf);
989 if (strbuf_getline_lf(buf, stdin) == EOF)
990 goto free_specs;
991 if (!*buf->buf)
992 break;
993 } while (1);
995 ret = push(nr_spec, specs);
996 printf("\n");
997 fflush(stdout);
999 if (ret)
1000 exit(128); /* error already reported */
1002 free_specs:
1003 for (i = 0; i < nr_spec; i++)
1004 free(specs[i]);
1005 free(specs);
1008 int cmd_main(int argc, const char **argv)
1010 struct strbuf buf = STRBUF_INIT;
1011 int nongit;
1013 setup_git_directory_gently(&nongit);
1014 if (argc < 2) {
1015 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1016 return 1;
1019 options.verbosity = 1;
1020 options.progress = !!isatty(2);
1021 options.thin = 1;
1022 string_list_init(&options.deepen_not, 1);
1024 remote = remote_get(argv[1]);
1026 if (argc > 2) {
1027 end_url_with_slash(&url, argv[2]);
1028 } else {
1029 end_url_with_slash(&url, remote->url[0]);
1032 http_init(remote, url.buf, 0);
1034 do {
1035 const char *arg;
1037 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1038 if (ferror(stdin))
1039 error("remote-curl: error reading command stream from git");
1040 return 1;
1042 if (buf.len == 0)
1043 break;
1044 if (starts_with(buf.buf, "fetch ")) {
1045 if (nongit)
1046 die("remote-curl: fetch attempted without a local repo");
1047 parse_fetch(&buf);
1049 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1050 int for_push = !!strstr(buf.buf + 4, "for-push");
1051 output_refs(get_refs(for_push));
1053 } else if (starts_with(buf.buf, "push ")) {
1054 parse_push(&buf);
1056 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1057 char *value = strchr(arg, ' ');
1058 int result;
1060 if (value)
1061 *value++ = '\0';
1062 else
1063 value = "true";
1065 result = set_option(arg, value);
1066 if (!result)
1067 printf("ok\n");
1068 else if (result < 0)
1069 printf("error invalid value\n");
1070 else
1071 printf("unsupported\n");
1072 fflush(stdout);
1074 } else if (!strcmp(buf.buf, "capabilities")) {
1075 printf("fetch\n");
1076 printf("option\n");
1077 printf("push\n");
1078 printf("check-connectivity\n");
1079 printf("\n");
1080 fflush(stdout);
1081 } else {
1082 error("remote-curl: unknown command '%s' from git", buf.buf);
1083 return 1;
1085 strbuf_reset(&buf);
1086 } while (1);
1088 http_cleanup();
1090 return 0;