The seventh batch
[git.git] / remote-curl.c
blob5cbc6e50025b7cbf8b210cdd7bd6638fe2fa57fa
1 #include "cache.h"
2 #include "config.h"
3 #include "remote.h"
4 #include "connect.h"
5 #include "strbuf.h"
6 #include "walker.h"
7 #include "http.h"
8 #include "exec-cmd.h"
9 #include "run-command.h"
10 #include "pkt-line.h"
11 #include "string-list.h"
12 #include "sideband.h"
13 #include "argv-array.h"
14 #include "credential.h"
15 #include "oid-array.h"
16 #include "send-pack.h"
17 #include "protocol.h"
18 #include "quote.h"
19 #include "transport.h"
21 static struct remote *remote;
22 /* always ends with a trailing slash */
23 static struct strbuf url = STRBUF_INIT;
25 struct options {
26 int verbosity;
27 unsigned long depth;
28 char *deepen_since;
29 struct string_list deepen_not;
30 struct string_list push_options;
31 char *filter;
32 unsigned progress : 1,
33 check_self_contained_and_connected : 1,
34 cloning : 1,
35 update_shallow : 1,
36 followtags : 1,
37 dry_run : 1,
38 thin : 1,
39 /* One of the SEND_PACK_PUSH_CERT_* constants. */
40 push_cert : 2,
41 deepen_relative : 1,
42 from_promisor : 1,
43 no_dependents : 1,
44 atomic : 1,
45 object_format : 1;
46 const struct git_hash_algo *hash_algo;
48 static struct options options;
49 static struct string_list cas_options = STRING_LIST_INIT_DUP;
51 static int set_option(const char *name, const char *value)
53 if (!strcmp(name, "verbosity")) {
54 char *end;
55 int v = strtol(value, &end, 10);
56 if (value == end || *end)
57 return -1;
58 options.verbosity = v;
59 return 0;
61 else if (!strcmp(name, "progress")) {
62 if (!strcmp(value, "true"))
63 options.progress = 1;
64 else if (!strcmp(value, "false"))
65 options.progress = 0;
66 else
67 return -1;
68 return 0;
70 else if (!strcmp(name, "depth")) {
71 char *end;
72 unsigned long v = strtoul(value, &end, 10);
73 if (value == end || *end)
74 return -1;
75 options.depth = v;
76 return 0;
78 else if (!strcmp(name, "deepen-since")) {
79 options.deepen_since = xstrdup(value);
80 return 0;
82 else if (!strcmp(name, "deepen-not")) {
83 string_list_append(&options.deepen_not, value);
84 return 0;
86 else if (!strcmp(name, "deepen-relative")) {
87 if (!strcmp(value, "true"))
88 options.deepen_relative = 1;
89 else if (!strcmp(value, "false"))
90 options.deepen_relative = 0;
91 else
92 return -1;
93 return 0;
95 else if (!strcmp(name, "followtags")) {
96 if (!strcmp(value, "true"))
97 options.followtags = 1;
98 else if (!strcmp(value, "false"))
99 options.followtags = 0;
100 else
101 return -1;
102 return 0;
104 else if (!strcmp(name, "dry-run")) {
105 if (!strcmp(value, "true"))
106 options.dry_run = 1;
107 else if (!strcmp(value, "false"))
108 options.dry_run = 0;
109 else
110 return -1;
111 return 0;
113 else if (!strcmp(name, "check-connectivity")) {
114 if (!strcmp(value, "true"))
115 options.check_self_contained_and_connected = 1;
116 else if (!strcmp(value, "false"))
117 options.check_self_contained_and_connected = 0;
118 else
119 return -1;
120 return 0;
122 else if (!strcmp(name, "cas")) {
123 struct strbuf val = STRBUF_INIT;
124 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
125 string_list_append(&cas_options, val.buf);
126 strbuf_release(&val);
127 return 0;
128 } else if (!strcmp(name, "cloning")) {
129 if (!strcmp(value, "true"))
130 options.cloning = 1;
131 else if (!strcmp(value, "false"))
132 options.cloning = 0;
133 else
134 return -1;
135 return 0;
136 } else if (!strcmp(name, "update-shallow")) {
137 if (!strcmp(value, "true"))
138 options.update_shallow = 1;
139 else if (!strcmp(value, "false"))
140 options.update_shallow = 0;
141 else
142 return -1;
143 return 0;
144 } else if (!strcmp(name, "pushcert")) {
145 if (!strcmp(value, "true"))
146 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
147 else if (!strcmp(value, "false"))
148 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
149 else if (!strcmp(value, "if-asked"))
150 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
151 else
152 return -1;
153 return 0;
154 } else if (!strcmp(name, "atomic")) {
155 if (!strcmp(value, "true"))
156 options.atomic = 1;
157 else if (!strcmp(value, "false"))
158 options.atomic = 0;
159 else
160 return -1;
161 return 0;
162 } else if (!strcmp(name, "push-option")) {
163 if (*value != '"')
164 string_list_append(&options.push_options, value);
165 else {
166 struct strbuf unquoted = STRBUF_INIT;
167 if (unquote_c_style(&unquoted, value, NULL) < 0)
168 die(_("invalid quoting in push-option value: '%s'"), value);
169 string_list_append_nodup(&options.push_options,
170 strbuf_detach(&unquoted, NULL));
172 return 0;
174 #if LIBCURL_VERSION_NUM >= 0x070a08
175 } else if (!strcmp(name, "family")) {
176 if (!strcmp(value, "ipv4"))
177 git_curl_ipresolve = CURL_IPRESOLVE_V4;
178 else if (!strcmp(value, "ipv6"))
179 git_curl_ipresolve = CURL_IPRESOLVE_V6;
180 else if (!strcmp(value, "all"))
181 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
182 else
183 return -1;
184 return 0;
185 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
186 } else if (!strcmp(name, "from-promisor")) {
187 options.from_promisor = 1;
188 return 0;
189 } else if (!strcmp(name, "no-dependents")) {
190 options.no_dependents = 1;
191 return 0;
192 } else if (!strcmp(name, "filter")) {
193 options.filter = xstrdup(value);
194 return 0;
195 } else if (!strcmp(name, "object-format")) {
196 int algo;
197 options.object_format = 1;
198 if (strcmp(value, "true")) {
199 algo = hash_algo_by_name(value);
200 if (algo == GIT_HASH_UNKNOWN)
201 die("unknown object format '%s'", value);
202 options.hash_algo = &hash_algos[algo];
204 return 0;
205 } else {
206 return 1 /* unsupported */;
210 struct discovery {
211 char *service;
212 char *buf_alloc;
213 char *buf;
214 size_t len;
215 struct ref *refs;
216 struct oid_array shallow;
217 enum protocol_version version;
218 unsigned proto_git : 1;
220 static struct discovery *last_discovery;
222 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
224 struct ref *list = NULL;
225 struct packet_reader reader;
227 packet_reader_init(&reader, -1, heads->buf, heads->len,
228 PACKET_READ_CHOMP_NEWLINE |
229 PACKET_READ_GENTLE_ON_EOF |
230 PACKET_READ_DIE_ON_ERR_PACKET);
232 heads->version = discover_version(&reader);
233 switch (heads->version) {
234 case protocol_v2:
236 * Do nothing. This isn't a list of refs but rather a
237 * capability advertisement. Client would have run
238 * 'stateless-connect' so we'll dump this capability listing
239 * and let them request the refs themselves.
241 break;
242 case protocol_v1:
243 case protocol_v0:
244 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
245 NULL, &heads->shallow);
246 options.hash_algo = reader.hash_algo;
247 break;
248 case protocol_unknown_version:
249 BUG("unknown protocol version");
252 return list;
255 static const struct git_hash_algo *detect_hash_algo(struct discovery *heads)
257 const char *p = memchr(heads->buf, '\t', heads->len);
258 int algo;
259 if (!p)
260 return the_hash_algo;
262 algo = hash_algo_by_length((p - heads->buf) / 2);
263 if (algo == GIT_HASH_UNKNOWN)
264 return NULL;
265 return &hash_algos[algo];
268 static struct ref *parse_info_refs(struct discovery *heads)
270 char *data, *start, *mid;
271 char *ref_name;
272 int i = 0;
274 struct ref *refs = NULL;
275 struct ref *ref = NULL;
276 struct ref *last_ref = NULL;
278 options.hash_algo = detect_hash_algo(heads);
279 if (!options.hash_algo)
280 die("%sinfo/refs not valid: could not determine hash algorithm; "
281 "is this a git repository?",
282 transport_anonymize_url(url.buf));
284 data = heads->buf;
285 start = NULL;
286 mid = data;
287 while (i < heads->len) {
288 if (!start) {
289 start = &data[i];
291 if (data[i] == '\t')
292 mid = &data[i];
293 if (data[i] == '\n') {
294 if (mid - start != options.hash_algo->hexsz)
295 die(_("%sinfo/refs not valid: is this a git repository?"),
296 transport_anonymize_url(url.buf));
297 data[i] = 0;
298 ref_name = mid + 1;
299 ref = alloc_ref(ref_name);
300 get_oid_hex_algop(start, &ref->old_oid, options.hash_algo);
301 if (!refs)
302 refs = ref;
303 if (last_ref)
304 last_ref->next = ref;
305 last_ref = ref;
306 start = NULL;
308 i++;
311 ref = alloc_ref("HEAD");
312 if (!http_fetch_ref(url.buf, ref) &&
313 !resolve_remote_symref(ref, refs)) {
314 ref->next = refs;
315 refs = ref;
316 } else {
317 free(ref);
320 return refs;
323 static void free_discovery(struct discovery *d)
325 if (d) {
326 if (d == last_discovery)
327 last_discovery = NULL;
328 free(d->shallow.oid);
329 free(d->buf_alloc);
330 free_refs(d->refs);
331 free(d->service);
332 free(d);
336 static int show_http_message(struct strbuf *type, struct strbuf *charset,
337 struct strbuf *msg)
339 const char *p, *eol;
342 * We only show text/plain parts, as other types are likely
343 * to be ugly to look at on the user's terminal.
345 if (strcmp(type->buf, "text/plain"))
346 return -1;
347 if (charset->len)
348 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
350 strbuf_trim(msg);
351 if (!msg->len)
352 return -1;
354 p = msg->buf;
355 do {
356 eol = strchrnul(p, '\n');
357 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
358 p = eol + 1;
359 } while(*eol);
360 return 0;
363 static int get_protocol_http_header(enum protocol_version version,
364 struct strbuf *header)
366 if (version > 0) {
367 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
368 version);
370 return 1;
373 return 0;
376 static void check_smart_http(struct discovery *d, const char *service,
377 struct strbuf *type)
379 const char *p;
380 struct packet_reader reader;
383 * If we don't see x-$service-advertisement, then it's not smart-http.
384 * But once we do, we commit to it and assume any other protocol
385 * violations are hard errors.
387 if (!skip_prefix(type->buf, "application/x-", &p) ||
388 !skip_prefix(p, service, &p) ||
389 strcmp(p, "-advertisement"))
390 return;
392 packet_reader_init(&reader, -1, d->buf, d->len,
393 PACKET_READ_CHOMP_NEWLINE |
394 PACKET_READ_DIE_ON_ERR_PACKET);
395 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
396 die(_("invalid server response; expected service, got flush packet"));
398 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
400 * The header can include additional metadata lines, up
401 * until a packet flush marker. Ignore these now, but
402 * in the future we might start to scan them.
404 for (;;) {
405 packet_reader_read(&reader);
406 if (reader.pktlen <= 0) {
407 break;
412 * v0 smart http; callers expect us to soak up the
413 * service and header packets
415 d->buf = reader.src_buffer;
416 d->len = reader.src_len;
417 d->proto_git = 1;
419 } else if (!strcmp(reader.line, "version 2")) {
421 * v2 smart http; do not consume version packet, which will
422 * be handled elsewhere.
424 d->proto_git = 1;
426 } else {
427 die(_("invalid server response; got '%s'"), reader.line);
431 static struct discovery *discover_refs(const char *service, int for_push)
433 struct strbuf type = STRBUF_INIT;
434 struct strbuf charset = STRBUF_INIT;
435 struct strbuf buffer = STRBUF_INIT;
436 struct strbuf refs_url = STRBUF_INIT;
437 struct strbuf effective_url = STRBUF_INIT;
438 struct strbuf protocol_header = STRBUF_INIT;
439 struct string_list extra_headers = STRING_LIST_INIT_DUP;
440 struct discovery *last = last_discovery;
441 int http_ret, maybe_smart = 0;
442 struct http_get_options http_options;
443 enum protocol_version version = get_protocol_version_config();
445 if (last && !strcmp(service, last->service))
446 return last;
447 free_discovery(last);
449 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
450 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
451 git_env_bool("GIT_SMART_HTTP", 1)) {
452 maybe_smart = 1;
453 if (!strchr(url.buf, '?'))
454 strbuf_addch(&refs_url, '?');
455 else
456 strbuf_addch(&refs_url, '&');
457 strbuf_addf(&refs_url, "service=%s", service);
461 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
462 * to perform a push, then fallback to v0 since the client doesn't know
463 * how to push yet using v2.
465 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
466 version = protocol_v0;
468 /* Add the extra Git-Protocol header */
469 if (get_protocol_http_header(version, &protocol_header))
470 string_list_append(&extra_headers, protocol_header.buf);
472 memset(&http_options, 0, sizeof(http_options));
473 http_options.content_type = &type;
474 http_options.charset = &charset;
475 http_options.effective_url = &effective_url;
476 http_options.base_url = &url;
477 http_options.extra_headers = &extra_headers;
478 http_options.initial_request = 1;
479 http_options.no_cache = 1;
481 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
482 switch (http_ret) {
483 case HTTP_OK:
484 break;
485 case HTTP_MISSING_TARGET:
486 show_http_message(&type, &charset, &buffer);
487 die(_("repository '%s' not found"),
488 transport_anonymize_url(url.buf));
489 case HTTP_NOAUTH:
490 show_http_message(&type, &charset, &buffer);
491 die(_("Authentication failed for '%s'"),
492 transport_anonymize_url(url.buf));
493 default:
494 show_http_message(&type, &charset, &buffer);
495 die(_("unable to access '%s': %s"),
496 transport_anonymize_url(url.buf), curl_errorstr);
499 if (options.verbosity && !starts_with(refs_url.buf, url.buf)) {
500 char *u = transport_anonymize_url(url.buf);
501 warning(_("redirecting to %s"), u);
502 free(u);
505 last= xcalloc(1, sizeof(*last_discovery));
506 last->service = xstrdup(service);
507 last->buf_alloc = strbuf_detach(&buffer, &last->len);
508 last->buf = last->buf_alloc;
510 if (maybe_smart)
511 check_smart_http(last, service, &type);
513 if (last->proto_git)
514 last->refs = parse_git_refs(last, for_push);
515 else
516 last->refs = parse_info_refs(last);
518 strbuf_release(&refs_url);
519 strbuf_release(&type);
520 strbuf_release(&charset);
521 strbuf_release(&effective_url);
522 strbuf_release(&buffer);
523 strbuf_release(&protocol_header);
524 string_list_clear(&extra_headers, 0);
525 last_discovery = last;
526 return last;
529 static struct ref *get_refs(int for_push)
531 struct discovery *heads;
533 if (for_push)
534 heads = discover_refs("git-receive-pack", for_push);
535 else
536 heads = discover_refs("git-upload-pack", for_push);
538 return heads->refs;
541 static void output_refs(struct ref *refs)
543 struct ref *posn;
544 if (options.object_format && options.hash_algo) {
545 printf(":object-format %s\n", options.hash_algo->name);
547 for (posn = refs; posn; posn = posn->next) {
548 if (posn->symref)
549 printf("@%s %s\n", posn->symref, posn->name);
550 else
551 printf("%s %s\n", hash_to_hex_algop(posn->old_oid.hash,
552 options.hash_algo),
553 posn->name);
555 printf("\n");
556 fflush(stdout);
559 struct rpc_state {
560 const char *service_name;
561 char *service_url;
562 char *hdr_content_type;
563 char *hdr_accept;
564 char *protocol_header;
565 char *buf;
566 size_t alloc;
567 size_t len;
568 size_t pos;
569 int in;
570 int out;
571 int any_written;
572 unsigned gzip_request : 1;
573 unsigned initial_buffer : 1;
576 * Whenever a pkt-line is read into buf, append the 4 characters
577 * denoting its length before appending the payload.
579 unsigned write_line_lengths : 1;
582 * Used by rpc_out; initialize to 0. This is true if a flush has been
583 * read, but the corresponding line length (if write_line_lengths is
584 * true) and EOF have not been sent to libcurl. Since each flush marks
585 * the end of a request, each flush must be completely sent before any
586 * further reading occurs.
588 unsigned flush_read_but_not_sent : 1;
592 * Appends the result of reading from rpc->out to the string represented by
593 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
594 * enough space, 0 otherwise.
596 * If rpc->write_line_lengths is true, appends the line length as a 4-byte
597 * hexadecimal string before appending the result described above.
599 * Writes the total number of bytes appended into appended.
601 static int rpc_read_from_out(struct rpc_state *rpc, int options,
602 size_t *appended,
603 enum packet_read_status *status) {
604 size_t left;
605 char *buf;
606 int pktlen_raw;
608 if (rpc->write_line_lengths) {
609 left = rpc->alloc - rpc->len - 4;
610 buf = rpc->buf + rpc->len + 4;
611 } else {
612 left = rpc->alloc - rpc->len;
613 buf = rpc->buf + rpc->len;
616 if (left < LARGE_PACKET_MAX)
617 return 0;
619 *status = packet_read_with_status(rpc->out, NULL, NULL, buf,
620 left, &pktlen_raw, options);
621 if (*status != PACKET_READ_EOF) {
622 *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0);
623 rpc->len += *appended;
626 if (rpc->write_line_lengths) {
627 switch (*status) {
628 case PACKET_READ_EOF:
629 if (!(options & PACKET_READ_GENTLE_ON_EOF))
630 die(_("shouldn't have EOF when not gentle on EOF"));
631 break;
632 case PACKET_READ_NORMAL:
633 set_packet_header(buf - 4, *appended);
634 break;
635 case PACKET_READ_DELIM:
636 memcpy(buf - 4, "0001", 4);
637 break;
638 case PACKET_READ_FLUSH:
639 memcpy(buf - 4, "0000", 4);
640 break;
641 case PACKET_READ_RESPONSE_END:
642 die(_("remote server sent stateless separator"));
646 return 1;
649 static size_t rpc_out(void *ptr, size_t eltsize,
650 size_t nmemb, void *buffer_)
652 size_t max = eltsize * nmemb;
653 struct rpc_state *rpc = buffer_;
654 size_t avail = rpc->len - rpc->pos;
655 enum packet_read_status status;
657 if (!avail) {
658 rpc->initial_buffer = 0;
659 rpc->len = 0;
660 rpc->pos = 0;
661 if (!rpc->flush_read_but_not_sent) {
662 if (!rpc_read_from_out(rpc, 0, &avail, &status))
663 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
664 if (status == PACKET_READ_FLUSH)
665 rpc->flush_read_but_not_sent = 1;
668 * If flush_read_but_not_sent is true, we have already read one
669 * full request but have not fully sent it + EOF, which is why
670 * we need to refrain from reading.
673 if (rpc->flush_read_but_not_sent) {
674 if (!avail) {
676 * The line length either does not need to be sent at
677 * all or has already been completely sent. Now we can
678 * return 0, indicating EOF, meaning that the flush has
679 * been fully sent.
681 rpc->flush_read_but_not_sent = 0;
682 return 0;
685 * If avail is non-zero, the line length for the flush still
686 * hasn't been fully sent. Proceed with sending the line
687 * length.
691 if (max < avail)
692 avail = max;
693 memcpy(ptr, rpc->buf + rpc->pos, avail);
694 rpc->pos += avail;
695 return avail;
698 #ifndef NO_CURL_IOCTL
699 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
701 struct rpc_state *rpc = clientp;
703 switch (cmd) {
704 case CURLIOCMD_NOP:
705 return CURLIOE_OK;
707 case CURLIOCMD_RESTARTREAD:
708 if (rpc->initial_buffer) {
709 rpc->pos = 0;
710 return CURLIOE_OK;
712 error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
713 return CURLIOE_FAILRESTART;
715 default:
716 return CURLIOE_UNKNOWNCMD;
719 #endif
721 struct check_pktline_state {
722 char len_buf[4];
723 int len_filled;
724 int remaining;
727 static void check_pktline(struct check_pktline_state *state, const char *ptr, size_t size)
729 while (size) {
730 if (!state->remaining) {
731 int digits_remaining = 4 - state->len_filled;
732 if (digits_remaining > size)
733 digits_remaining = size;
734 memcpy(&state->len_buf[state->len_filled], ptr, digits_remaining);
735 state->len_filled += digits_remaining;
736 ptr += digits_remaining;
737 size -= digits_remaining;
739 if (state->len_filled == 4) {
740 state->remaining = packet_length(state->len_buf);
741 if (state->remaining < 0) {
742 die(_("remote-curl: bad line length character: %.4s"), state->len_buf);
743 } else if (state->remaining == 2) {
744 die(_("remote-curl: unexpected response end packet"));
745 } else if (state->remaining < 4) {
746 state->remaining = 0;
747 } else {
748 state->remaining -= 4;
750 state->len_filled = 0;
754 if (state->remaining) {
755 int remaining = state->remaining;
756 if (remaining > size)
757 remaining = size;
758 ptr += remaining;
759 size -= remaining;
760 state->remaining -= remaining;
765 struct rpc_in_data {
766 struct rpc_state *rpc;
767 struct active_request_slot *slot;
768 int check_pktline;
769 struct check_pktline_state pktline_state;
773 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
774 * from ptr.
776 static size_t rpc_in(char *ptr, size_t eltsize,
777 size_t nmemb, void *buffer_)
779 size_t size = eltsize * nmemb;
780 struct rpc_in_data *data = buffer_;
781 long response_code;
783 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
784 &response_code) != CURLE_OK)
785 return size;
786 if (response_code >= 300)
787 return size;
788 if (size)
789 data->rpc->any_written = 1;
790 if (data->check_pktline)
791 check_pktline(&data->pktline_state, ptr, size);
792 write_or_die(data->rpc->in, ptr, size);
793 return size;
796 static int run_slot(struct active_request_slot *slot,
797 struct slot_results *results)
799 int err;
800 struct slot_results results_buf;
802 if (!results)
803 results = &results_buf;
805 err = run_one_slot(slot, results);
807 if (err != HTTP_OK && err != HTTP_REAUTH) {
808 struct strbuf msg = STRBUF_INIT;
809 if (results->http_code && results->http_code != 200)
810 strbuf_addf(&msg, "HTTP %ld", results->http_code);
811 if (results->curl_result != CURLE_OK) {
812 if (msg.len)
813 strbuf_addch(&msg, ' ');
814 strbuf_addf(&msg, "curl %d", results->curl_result);
815 if (curl_errorstr[0]) {
816 strbuf_addch(&msg, ' ');
817 strbuf_addstr(&msg, curl_errorstr);
820 error(_("RPC failed; %s"), msg.buf);
821 strbuf_release(&msg);
824 return err;
827 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
829 struct active_request_slot *slot;
830 struct curl_slist *headers = http_copy_default_headers();
831 struct strbuf buf = STRBUF_INIT;
832 int err;
834 slot = get_active_slot();
836 headers = curl_slist_append(headers, rpc->hdr_content_type);
837 headers = curl_slist_append(headers, rpc->hdr_accept);
839 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
840 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
841 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
842 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
843 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
844 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
845 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
846 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
847 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
849 err = run_slot(slot, results);
851 curl_slist_free_all(headers);
852 strbuf_release(&buf);
853 return err;
856 static curl_off_t xcurl_off_t(size_t len)
858 uintmax_t size = len;
859 if (size > maximum_signed_value_of_type(curl_off_t))
860 die(_("cannot handle pushes this big"));
861 return (curl_off_t)size;
865 * If flush_received is true, do not attempt to read any more; just use what's
866 * in rpc->buf.
868 static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received)
870 struct active_request_slot *slot;
871 struct curl_slist *headers = http_copy_default_headers();
872 int use_gzip = rpc->gzip_request;
873 char *gzip_body = NULL;
874 size_t gzip_size = 0;
875 int err, large_request = 0;
876 int needs_100_continue = 0;
877 struct rpc_in_data rpc_in_data;
879 /* Try to load the entire request, if we can fit it into the
880 * allocated buffer space we can use HTTP/1.0 and avoid the
881 * chunked encoding mess.
883 if (!flush_received) {
884 while (1) {
885 size_t n;
886 enum packet_read_status status;
888 if (!rpc_read_from_out(rpc, 0, &n, &status)) {
889 large_request = 1;
890 use_gzip = 0;
891 break;
893 if (status == PACKET_READ_FLUSH)
894 break;
898 if (large_request) {
899 struct slot_results results;
901 do {
902 err = probe_rpc(rpc, &results);
903 if (err == HTTP_REAUTH)
904 credential_fill(&http_auth);
905 } while (err == HTTP_REAUTH);
906 if (err != HTTP_OK)
907 return -1;
909 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
910 needs_100_continue = 1;
913 headers = curl_slist_append(headers, rpc->hdr_content_type);
914 headers = curl_slist_append(headers, rpc->hdr_accept);
915 headers = curl_slist_append(headers, needs_100_continue ?
916 "Expect: 100-continue" : "Expect:");
918 /* Add the extra Git-Protocol header */
919 if (rpc->protocol_header)
920 headers = curl_slist_append(headers, rpc->protocol_header);
922 retry:
923 slot = get_active_slot();
925 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
926 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
927 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
928 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
930 if (large_request) {
931 /* The request body is large and the size cannot be predicted.
932 * We must use chunked encoding to send it.
934 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
935 rpc->initial_buffer = 1;
936 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
937 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
938 #ifndef NO_CURL_IOCTL
939 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
940 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
941 #endif
942 if (options.verbosity > 1) {
943 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
944 fflush(stderr);
947 } else if (gzip_body) {
949 * If we are looping to retry authentication, then the previous
950 * run will have set up the headers and gzip buffer already,
951 * and we just need to send it.
953 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
954 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
956 } else if (use_gzip && 1024 < rpc->len) {
957 /* The client backend isn't giving us compressed data so
958 * we can try to deflate it ourselves, this may save on
959 * the transfer time.
961 git_zstream stream;
962 int ret;
964 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
965 gzip_size = git_deflate_bound(&stream, rpc->len);
966 gzip_body = xmalloc(gzip_size);
968 stream.next_in = (unsigned char *)rpc->buf;
969 stream.avail_in = rpc->len;
970 stream.next_out = (unsigned char *)gzip_body;
971 stream.avail_out = gzip_size;
973 ret = git_deflate(&stream, Z_FINISH);
974 if (ret != Z_STREAM_END)
975 die(_("cannot deflate request; zlib deflate error %d"), ret);
977 ret = git_deflate_end_gently(&stream);
978 if (ret != Z_OK)
979 die(_("cannot deflate request; zlib end error %d"), ret);
981 gzip_size = stream.total_out;
983 headers = curl_slist_append(headers, "Content-Encoding: gzip");
984 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
985 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
987 if (options.verbosity > 1) {
988 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
989 rpc->service_name,
990 (unsigned long)rpc->len, (unsigned long)gzip_size);
991 fflush(stderr);
993 } else {
994 /* We know the complete request size in advance, use the
995 * more normal Content-Length approach.
997 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
998 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
999 if (options.verbosity > 1) {
1000 fprintf(stderr, "POST %s (%lu bytes)\n",
1001 rpc->service_name, (unsigned long)rpc->len);
1002 fflush(stderr);
1006 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1007 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
1008 rpc_in_data.rpc = rpc;
1009 rpc_in_data.slot = slot;
1010 rpc_in_data.check_pktline = stateless_connect;
1011 memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state));
1012 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
1013 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1016 rpc->any_written = 0;
1017 err = run_slot(slot, NULL);
1018 if (err == HTTP_REAUTH && !large_request) {
1019 credential_fill(&http_auth);
1020 goto retry;
1022 if (err != HTTP_OK)
1023 err = -1;
1025 if (!rpc->any_written)
1026 err = -1;
1028 if (rpc_in_data.pktline_state.len_filled)
1029 err = error(_("%d bytes of length header were received"), rpc_in_data.pktline_state.len_filled);
1030 if (rpc_in_data.pktline_state.remaining)
1031 err = error(_("%d bytes of body are still expected"), rpc_in_data.pktline_state.remaining);
1033 if (stateless_connect)
1034 packet_response_end(rpc->in);
1036 curl_slist_free_all(headers);
1037 free(gzip_body);
1038 return err;
1041 static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
1042 const char **client_argv, const struct strbuf *preamble,
1043 struct strbuf *rpc_result)
1045 const char *svc = rpc->service_name;
1046 struct strbuf buf = STRBUF_INIT;
1047 struct child_process client = CHILD_PROCESS_INIT;
1048 int err = 0;
1050 client.in = -1;
1051 client.out = -1;
1052 client.git_cmd = 1;
1053 client.argv = client_argv;
1054 if (start_command(&client))
1055 exit(1);
1056 write_or_die(client.in, preamble->buf, preamble->len);
1057 if (heads)
1058 write_or_die(client.in, heads->buf, heads->len);
1060 rpc->alloc = http_post_buffer;
1061 rpc->buf = xmalloc(rpc->alloc);
1062 rpc->in = client.in;
1063 rpc->out = client.out;
1065 strbuf_addf(&buf, "%s%s", url.buf, svc);
1066 rpc->service_url = strbuf_detach(&buf, NULL);
1068 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
1069 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
1071 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
1072 rpc->hdr_accept = strbuf_detach(&buf, NULL);
1074 if (get_protocol_http_header(heads->version, &buf))
1075 rpc->protocol_header = strbuf_detach(&buf, NULL);
1076 else
1077 rpc->protocol_header = NULL;
1079 while (!err) {
1080 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
1081 if (!n)
1082 break;
1083 rpc->pos = 0;
1084 rpc->len = n;
1085 err |= post_rpc(rpc, 0, 0);
1088 close(client.in);
1089 client.in = -1;
1090 if (!err) {
1091 strbuf_read(rpc_result, client.out, 0);
1092 } else {
1093 char buf[4096];
1094 for (;;)
1095 if (xread(client.out, buf, sizeof(buf)) <= 0)
1096 break;
1099 close(client.out);
1100 client.out = -1;
1102 err |= finish_command(&client);
1103 free(rpc->service_url);
1104 free(rpc->hdr_content_type);
1105 free(rpc->hdr_accept);
1106 free(rpc->protocol_header);
1107 free(rpc->buf);
1108 strbuf_release(&buf);
1109 return err;
1112 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
1114 struct walker *walker;
1115 char **targets;
1116 int ret, i;
1118 ALLOC_ARRAY(targets, nr_heads);
1119 if (options.depth || options.deepen_since)
1120 die(_("dumb http transport does not support shallow capabilities"));
1121 for (i = 0; i < nr_heads; i++)
1122 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
1124 walker = get_http_walker(url.buf);
1125 walker->get_verbosely = options.verbosity >= 3;
1126 walker->get_progress = options.progress;
1127 walker->get_recover = 0;
1128 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
1129 walker_free(walker);
1131 for (i = 0; i < nr_heads; i++)
1132 free(targets[i]);
1133 free(targets);
1135 return ret ? error(_("fetch failed.")) : 0;
1138 static int fetch_git(struct discovery *heads,
1139 int nr_heads, struct ref **to_fetch)
1141 struct rpc_state rpc;
1142 struct strbuf preamble = STRBUF_INIT;
1143 int i, err;
1144 struct argv_array args = ARGV_ARRAY_INIT;
1145 struct strbuf rpc_result = STRBUF_INIT;
1147 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
1148 "--stdin", "--lock-pack", NULL);
1149 if (options.followtags)
1150 argv_array_push(&args, "--include-tag");
1151 if (options.thin)
1152 argv_array_push(&args, "--thin");
1153 if (options.verbosity >= 3)
1154 argv_array_pushl(&args, "-v", "-v", NULL);
1155 if (options.check_self_contained_and_connected)
1156 argv_array_push(&args, "--check-self-contained-and-connected");
1157 if (options.cloning)
1158 argv_array_push(&args, "--cloning");
1159 if (options.update_shallow)
1160 argv_array_push(&args, "--update-shallow");
1161 if (!options.progress)
1162 argv_array_push(&args, "--no-progress");
1163 if (options.depth)
1164 argv_array_pushf(&args, "--depth=%lu", options.depth);
1165 if (options.deepen_since)
1166 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
1167 for (i = 0; i < options.deepen_not.nr; i++)
1168 argv_array_pushf(&args, "--shallow-exclude=%s",
1169 options.deepen_not.items[i].string);
1170 if (options.deepen_relative && options.depth)
1171 argv_array_push(&args, "--deepen-relative");
1172 if (options.from_promisor)
1173 argv_array_push(&args, "--from-promisor");
1174 if (options.no_dependents)
1175 argv_array_push(&args, "--no-dependents");
1176 if (options.filter)
1177 argv_array_pushf(&args, "--filter=%s", options.filter);
1178 argv_array_push(&args, url.buf);
1180 for (i = 0; i < nr_heads; i++) {
1181 struct ref *ref = to_fetch[i];
1182 if (!*ref->name)
1183 die(_("cannot fetch by sha1 over smart http"));
1184 packet_buf_write(&preamble, "%s %s\n",
1185 oid_to_hex(&ref->old_oid), ref->name);
1187 packet_buf_flush(&preamble);
1189 memset(&rpc, 0, sizeof(rpc));
1190 rpc.service_name = "git-upload-pack",
1191 rpc.gzip_request = 1;
1193 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
1194 if (rpc_result.len)
1195 write_or_die(1, rpc_result.buf, rpc_result.len);
1196 strbuf_release(&rpc_result);
1197 strbuf_release(&preamble);
1198 argv_array_clear(&args);
1199 return err;
1202 static int fetch(int nr_heads, struct ref **to_fetch)
1204 struct discovery *d = discover_refs("git-upload-pack", 0);
1205 if (d->proto_git)
1206 return fetch_git(d, nr_heads, to_fetch);
1207 else
1208 return fetch_dumb(nr_heads, to_fetch);
1211 static void parse_fetch(struct strbuf *buf)
1213 struct ref **to_fetch = NULL;
1214 struct ref *list_head = NULL;
1215 struct ref **list = &list_head;
1216 int alloc_heads = 0, nr_heads = 0;
1218 do {
1219 const char *p;
1220 if (skip_prefix(buf->buf, "fetch ", &p)) {
1221 const char *name;
1222 struct ref *ref;
1223 struct object_id old_oid;
1224 const char *q;
1226 if (parse_oid_hex(p, &old_oid, &q))
1227 die(_("protocol error: expected sha/ref, got '%s'"), p);
1228 if (*q == ' ')
1229 name = q + 1;
1230 else if (!*q)
1231 name = "";
1232 else
1233 die(_("protocol error: expected sha/ref, got '%s'"), p);
1235 ref = alloc_ref(name);
1236 oidcpy(&ref->old_oid, &old_oid);
1238 *list = ref;
1239 list = &ref->next;
1241 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1242 to_fetch[nr_heads++] = ref;
1244 else
1245 die(_("http transport does not support %s"), buf->buf);
1247 strbuf_reset(buf);
1248 if (strbuf_getline_lf(buf, stdin) == EOF)
1249 return;
1250 if (!*buf->buf)
1251 break;
1252 } while (1);
1254 if (fetch(nr_heads, to_fetch))
1255 exit(128); /* error already reported */
1256 free_refs(list_head);
1257 free(to_fetch);
1259 printf("\n");
1260 fflush(stdout);
1261 strbuf_reset(buf);
1264 static int push_dav(int nr_spec, const char **specs)
1266 struct child_process child = CHILD_PROCESS_INIT;
1267 size_t i;
1269 child.git_cmd = 1;
1270 argv_array_push(&child.args, "http-push");
1271 argv_array_push(&child.args, "--helper-status");
1272 if (options.dry_run)
1273 argv_array_push(&child.args, "--dry-run");
1274 if (options.verbosity > 1)
1275 argv_array_push(&child.args, "--verbose");
1276 argv_array_push(&child.args, url.buf);
1277 for (i = 0; i < nr_spec; i++)
1278 argv_array_push(&child.args, specs[i]);
1280 if (run_command(&child))
1281 die(_("git-http-push failed"));
1282 return 0;
1285 static int push_git(struct discovery *heads, int nr_spec, const char **specs)
1287 struct rpc_state rpc;
1288 int i, err;
1289 struct argv_array args;
1290 struct string_list_item *cas_option;
1291 struct strbuf preamble = STRBUF_INIT;
1292 struct strbuf rpc_result = STRBUF_INIT;
1294 argv_array_init(&args);
1295 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1296 NULL);
1298 if (options.thin)
1299 argv_array_push(&args, "--thin");
1300 if (options.dry_run)
1301 argv_array_push(&args, "--dry-run");
1302 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1303 argv_array_push(&args, "--signed=yes");
1304 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1305 argv_array_push(&args, "--signed=if-asked");
1306 if (options.atomic)
1307 argv_array_push(&args, "--atomic");
1308 if (options.verbosity == 0)
1309 argv_array_push(&args, "--quiet");
1310 else if (options.verbosity > 1)
1311 argv_array_push(&args, "--verbose");
1312 for (i = 0; i < options.push_options.nr; i++)
1313 argv_array_pushf(&args, "--push-option=%s",
1314 options.push_options.items[i].string);
1315 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1316 for_each_string_list_item(cas_option, &cas_options)
1317 argv_array_push(&args, cas_option->string);
1318 argv_array_push(&args, url.buf);
1320 argv_array_push(&args, "--stdin");
1321 for (i = 0; i < nr_spec; i++)
1322 packet_buf_write(&preamble, "%s\n", specs[i]);
1323 packet_buf_flush(&preamble);
1325 memset(&rpc, 0, sizeof(rpc));
1326 rpc.service_name = "git-receive-pack",
1328 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
1329 if (rpc_result.len)
1330 write_or_die(1, rpc_result.buf, rpc_result.len);
1331 strbuf_release(&rpc_result);
1332 strbuf_release(&preamble);
1333 argv_array_clear(&args);
1334 return err;
1337 static int push(int nr_spec, const char **specs)
1339 struct discovery *heads = discover_refs("git-receive-pack", 1);
1340 int ret;
1342 if (heads->proto_git)
1343 ret = push_git(heads, nr_spec, specs);
1344 else
1345 ret = push_dav(nr_spec, specs);
1346 free_discovery(heads);
1347 return ret;
1350 static void parse_push(struct strbuf *buf)
1352 struct argv_array specs = ARGV_ARRAY_INIT;
1353 int ret;
1355 do {
1356 const char *arg;
1357 if (skip_prefix(buf->buf, "push ", &arg))
1358 argv_array_push(&specs, arg);
1359 else
1360 die(_("http transport does not support %s"), buf->buf);
1362 strbuf_reset(buf);
1363 if (strbuf_getline_lf(buf, stdin) == EOF)
1364 goto free_specs;
1365 if (!*buf->buf)
1366 break;
1367 } while (1);
1369 ret = push(specs.argc, specs.argv);
1370 printf("\n");
1371 fflush(stdout);
1373 if (ret)
1374 exit(128); /* error already reported */
1376 free_specs:
1377 argv_array_clear(&specs);
1380 static int stateless_connect(const char *service_name)
1382 struct discovery *discover;
1383 struct rpc_state rpc;
1384 struct strbuf buf = STRBUF_INIT;
1387 * Run the info/refs request and see if the server supports protocol
1388 * v2. If and only if the server supports v2 can we successfully
1389 * establish a stateless connection, otherwise we need to tell the
1390 * client to fallback to using other transport helper functions to
1391 * complete their request.
1393 discover = discover_refs(service_name, 0);
1394 if (discover->version != protocol_v2) {
1395 printf("fallback\n");
1396 fflush(stdout);
1397 return -1;
1398 } else {
1399 /* Stateless Connection established */
1400 printf("\n");
1401 fflush(stdout);
1404 rpc.service_name = service_name;
1405 rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name);
1406 rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name);
1407 rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name);
1408 if (get_protocol_http_header(discover->version, &buf)) {
1409 rpc.protocol_header = strbuf_detach(&buf, NULL);
1410 } else {
1411 rpc.protocol_header = NULL;
1412 strbuf_release(&buf);
1414 rpc.buf = xmalloc(http_post_buffer);
1415 rpc.alloc = http_post_buffer;
1416 rpc.len = 0;
1417 rpc.pos = 0;
1418 rpc.in = 1;
1419 rpc.out = 0;
1420 rpc.any_written = 0;
1421 rpc.gzip_request = 1;
1422 rpc.initial_buffer = 0;
1423 rpc.write_line_lengths = 1;
1424 rpc.flush_read_but_not_sent = 0;
1427 * Dump the capability listing that we got from the server earlier
1428 * during the info/refs request.
1430 write_or_die(rpc.in, discover->buf, discover->len);
1432 /* Until we see EOF keep sending POSTs */
1433 while (1) {
1434 size_t avail;
1435 enum packet_read_status status;
1437 if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail,
1438 &status))
1439 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
1440 if (status == PACKET_READ_EOF)
1441 break;
1442 if (post_rpc(&rpc, 1, status == PACKET_READ_FLUSH))
1443 /* We would have an err here */
1444 break;
1445 /* Reset the buffer for next request */
1446 rpc.len = 0;
1449 free(rpc.service_url);
1450 free(rpc.hdr_content_type);
1451 free(rpc.hdr_accept);
1452 free(rpc.protocol_header);
1453 free(rpc.buf);
1454 strbuf_release(&buf);
1456 return 0;
1459 int cmd_main(int argc, const char **argv)
1461 struct strbuf buf = STRBUF_INIT;
1462 int nongit;
1464 setup_git_directory_gently(&nongit);
1465 if (argc < 2) {
1466 error(_("remote-curl: usage: git remote-curl <remote> [<url>]"));
1467 return 1;
1470 options.verbosity = 1;
1471 options.progress = !!isatty(2);
1472 options.thin = 1;
1473 string_list_init(&options.deepen_not, 1);
1474 string_list_init(&options.push_options, 1);
1477 * Just report "remote-curl" here (folding all the various aliases
1478 * ("git-remote-http", "git-remote-https", and etc.) here since they
1479 * are all just copies of the same actual executable.
1481 trace2_cmd_name("remote-curl");
1483 remote = remote_get(argv[1]);
1485 if (argc > 2) {
1486 end_url_with_slash(&url, argv[2]);
1487 } else {
1488 end_url_with_slash(&url, remote->url[0]);
1491 http_init(remote, url.buf, 0);
1493 do {
1494 const char *arg;
1496 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1497 if (ferror(stdin))
1498 error(_("remote-curl: error reading command stream from git"));
1499 return 1;
1501 if (buf.len == 0)
1502 break;
1503 if (starts_with(buf.buf, "fetch ")) {
1504 if (nongit)
1505 die(_("remote-curl: fetch attempted without a local repo"));
1506 parse_fetch(&buf);
1508 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1509 int for_push = !!strstr(buf.buf + 4, "for-push");
1510 output_refs(get_refs(for_push));
1512 } else if (starts_with(buf.buf, "push ")) {
1513 parse_push(&buf);
1515 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1516 char *value = strchr(arg, ' ');
1517 int result;
1519 if (value)
1520 *value++ = '\0';
1521 else
1522 value = "true";
1524 result = set_option(arg, value);
1525 if (!result)
1526 printf("ok\n");
1527 else if (result < 0)
1528 printf("error invalid value\n");
1529 else
1530 printf("unsupported\n");
1531 fflush(stdout);
1533 } else if (!strcmp(buf.buf, "capabilities")) {
1534 printf("stateless-connect\n");
1535 printf("fetch\n");
1536 printf("option\n");
1537 printf("push\n");
1538 printf("check-connectivity\n");
1539 printf("object-format\n");
1540 printf("\n");
1541 fflush(stdout);
1542 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1543 if (!stateless_connect(arg))
1544 break;
1545 } else {
1546 error(_("remote-curl: unknown command '%s' from git"), buf.buf);
1547 return 1;
1549 strbuf_reset(&buf);
1550 } while (1);
1552 http_cleanup();
1554 return 0;