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Merge branch 'tk/simple-autosetupmerge'
[git/debian.git] / remote-curl.c
blob67f178b1120bd9167cef21382141ab96b8ff3514
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 "strvec.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"
20
21 static struct remote *remote;
22 /* always ends with a trailing slash */
23 static struct strbuf url = STRBUF_INIT;
24
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
43 /* see documentation of corresponding flag in fetch-pack.h */
44 from_promisor : 1,
45
46 refetch : 1,
47 atomic : 1,
48 object_format : 1,
49 force_if_includes : 1;
50 const struct git_hash_algo *hash_algo;
51 };
52 static struct options options;
53 static struct string_list cas_options = STRING_LIST_INIT_DUP;
54
55 static int set_option(const char *name, const char *value)
56 {
57 if (!strcmp(name, "verbosity")) {
58 char *end;
59 int v = strtol(value, &end, 10);
60 if (value == end || *end)
61 return -1;
62 options.verbosity = v;
63 return 0;
64 }
65 else if (!strcmp(name, "progress")) {
66 if (!strcmp(value, "true"))
67 options.progress = 1;
68 else if (!strcmp(value, "false"))
69 options.progress = 0;
70 else
71 return -1;
72 return 0;
73 }
74 else if (!strcmp(name, "depth")) {
75 char *end;
76 unsigned long v = strtoul(value, &end, 10);
77 if (value == end || *end)
78 return -1;
79 options.depth = v;
80 return 0;
81 }
82 else if (!strcmp(name, "deepen-since")) {
83 options.deepen_since = xstrdup(value);
84 return 0;
85 }
86 else if (!strcmp(name, "deepen-not")) {
87 string_list_append(&options.deepen_not, value);
88 return 0;
89 }
90 else if (!strcmp(name, "deepen-relative")) {
91 if (!strcmp(value, "true"))
92 options.deepen_relative = 1;
93 else if (!strcmp(value, "false"))
94 options.deepen_relative = 0;
95 else
96 return -1;
97 return 0;
98 }
99 else if (!strcmp(name, "followtags")) {
100 if (!strcmp(value, "true"))
101 options.followtags = 1;
102 else if (!strcmp(value, "false"))
103 options.followtags = 0;
104 else
105 return -1;
106 return 0;
107 }
108 else if (!strcmp(name, "dry-run")) {
109 if (!strcmp(value, "true"))
110 options.dry_run = 1;
111 else if (!strcmp(value, "false"))
112 options.dry_run = 0;
113 else
114 return -1;
115 return 0;
116 }
117 else if (!strcmp(name, "check-connectivity")) {
118 if (!strcmp(value, "true"))
119 options.check_self_contained_and_connected = 1;
120 else if (!strcmp(value, "false"))
121 options.check_self_contained_and_connected = 0;
122 else
123 return -1;
124 return 0;
125 }
126 else if (!strcmp(name, "cas")) {
127 struct strbuf val = STRBUF_INIT;
128 strbuf_addstr(&val, "--force-with-lease=");
129 if (*value != '"')
130 strbuf_addstr(&val, value);
131 else if (unquote_c_style(&val, value, NULL))
132 return -1;
133 string_list_append(&cas_options, val.buf);
134 strbuf_release(&val);
135 return 0;
136 } else if (!strcmp(name, TRANS_OPT_FORCE_IF_INCLUDES)) {
137 if (!strcmp(value, "true"))
138 options.force_if_includes = 1;
139 else if (!strcmp(value, "false"))
140 options.force_if_includes = 0;
141 else
142 return -1;
143 return 0;
144 } else if (!strcmp(name, "cloning")) {
145 if (!strcmp(value, "true"))
146 options.cloning = 1;
147 else if (!strcmp(value, "false"))
148 options.cloning = 0;
149 else
150 return -1;
151 return 0;
152 } else if (!strcmp(name, "update-shallow")) {
153 if (!strcmp(value, "true"))
154 options.update_shallow = 1;
155 else if (!strcmp(value, "false"))
156 options.update_shallow = 0;
157 else
158 return -1;
159 return 0;
160 } else if (!strcmp(name, "pushcert")) {
161 if (!strcmp(value, "true"))
162 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
163 else if (!strcmp(value, "false"))
164 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
165 else if (!strcmp(value, "if-asked"))
166 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
167 else
168 return -1;
169 return 0;
170 } else if (!strcmp(name, "atomic")) {
171 if (!strcmp(value, "true"))
172 options.atomic = 1;
173 else if (!strcmp(value, "false"))
174 options.atomic = 0;
175 else
176 return -1;
177 return 0;
178 } else if (!strcmp(name, "push-option")) {
179 if (*value != '"')
180 string_list_append(&options.push_options, value);
181 else {
182 struct strbuf unquoted = STRBUF_INIT;
183 if (unquote_c_style(&unquoted, value, NULL) < 0)
184 die(_("invalid quoting in push-option value: '%s'"), value);
185 string_list_append_nodup(&options.push_options,
186 strbuf_detach(&unquoted, NULL));
187 }
188 return 0;
189 } else if (!strcmp(name, "family")) {
190 if (!strcmp(value, "ipv4"))
191 git_curl_ipresolve = CURL_IPRESOLVE_V4;
192 else if (!strcmp(value, "ipv6"))
193 git_curl_ipresolve = CURL_IPRESOLVE_V6;
194 else if (!strcmp(value, "all"))
195 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
196 else
197 return -1;
198 return 0;
199 } else if (!strcmp(name, "from-promisor")) {
200 options.from_promisor = 1;
201 return 0;
202 } else if (!strcmp(name, "refetch")) {
203 options.refetch = 1;
204 return 0;
205 } else if (!strcmp(name, "filter")) {
206 options.filter = xstrdup(value);
207 return 0;
208 } else if (!strcmp(name, "object-format")) {
209 int algo;
210 options.object_format = 1;
211 if (strcmp(value, "true")) {
212 algo = hash_algo_by_name(value);
213 if (algo == GIT_HASH_UNKNOWN)
214 die("unknown object format '%s'", value);
215 options.hash_algo = &hash_algos[algo];
216 }
217 return 0;
218 } else {
219 return 1 /* unsupported */;
220 }
221 }
222
223 struct discovery {
224 char *service;
225 char *buf_alloc;
226 char *buf;
227 size_t len;
228 struct ref *refs;
229 struct oid_array shallow;
230 enum protocol_version version;
231 unsigned proto_git : 1;
232 };
233 static struct discovery *last_discovery;
234
235 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
236 {
237 struct ref *list = NULL;
238 struct packet_reader reader;
239
240 packet_reader_init(&reader, -1, heads->buf, heads->len,
241 PACKET_READ_CHOMP_NEWLINE |
242 PACKET_READ_GENTLE_ON_EOF |
243 PACKET_READ_DIE_ON_ERR_PACKET);
244
245 heads->version = discover_version(&reader);
246 switch (heads->version) {
247 case protocol_v2:
248 /*
249 * Do nothing. This isn't a list of refs but rather a
250 * capability advertisement. Client would have run
251 * 'stateless-connect' so we'll dump this capability listing
252 * and let them request the refs themselves.
253 */
254 break;
255 case protocol_v1:
256 case protocol_v0:
257 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
258 NULL, &heads->shallow);
259 options.hash_algo = reader.hash_algo;
260 break;
261 case protocol_unknown_version:
262 BUG("unknown protocol version");
263 }
264
265 return list;
266 }
267
268 static const struct git_hash_algo *detect_hash_algo(struct discovery *heads)
269 {
270 const char *p = memchr(heads->buf, '\t', heads->len);
271 int algo;
272 if (!p)
273 return the_hash_algo;
274
275 algo = hash_algo_by_length((p - heads->buf) / 2);
276 if (algo == GIT_HASH_UNKNOWN)
277 return NULL;
278 return &hash_algos[algo];
279 }
280
281 static struct ref *parse_info_refs(struct discovery *heads)
282 {
283 char *data, *start, *mid;
284 char *ref_name;
285 int i = 0;
286
287 struct ref *refs = NULL;
288 struct ref *ref = NULL;
289 struct ref *last_ref = NULL;
290
291 options.hash_algo = detect_hash_algo(heads);
292 if (!options.hash_algo)
293 die("%sinfo/refs not valid: could not determine hash algorithm; "
294 "is this a git repository?",
295 transport_anonymize_url(url.buf));
296
297 data = heads->buf;
298 start = NULL;
299 mid = data;
300 while (i < heads->len) {
301 if (!start) {
302 start = &data[i];
303 }
304 if (data[i] == '\t')
305 mid = &data[i];
306 if (data[i] == '\n') {
307 if (mid - start != options.hash_algo->hexsz)
308 die(_("%sinfo/refs not valid: is this a git repository?"),
309 transport_anonymize_url(url.buf));
310 data[i] = 0;
311 ref_name = mid + 1;
312 ref = alloc_ref(ref_name);
313 get_oid_hex_algop(start, &ref->old_oid, options.hash_algo);
314 if (!refs)
315 refs = ref;
316 if (last_ref)
317 last_ref->next = ref;
318 last_ref = ref;
319 start = NULL;
320 }
321 i++;
322 }
323
324 ref = alloc_ref("HEAD");
325 if (!http_fetch_ref(url.buf, ref) &&
326 !resolve_remote_symref(ref, refs)) {
327 ref->next = refs;
328 refs = ref;
329 } else {
330 free(ref);
331 }
332
333 return refs;
334 }
335
336 static void free_discovery(struct discovery *d)
337 {
338 if (d) {
339 if (d == last_discovery)
340 last_discovery = NULL;
341 free(d->shallow.oid);
342 free(d->buf_alloc);
343 free_refs(d->refs);
344 free(d->service);
345 free(d);
346 }
347 }
348
349 static int show_http_message(struct strbuf *type, struct strbuf *charset,
350 struct strbuf *msg)
351 {
352 const char *p, *eol;
353
354 /*
355 * We only show text/plain parts, as other types are likely
356 * to be ugly to look at on the user's terminal.
357 */
358 if (strcmp(type->buf, "text/plain"))
359 return -1;
360 if (charset->len)
361 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
362
363 strbuf_trim(msg);
364 if (!msg->len)
365 return -1;
366
367 p = msg->buf;
368 do {
369 eol = strchrnul(p, '\n');
370 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
371 p = eol + 1;
372 } while(*eol);
373 return 0;
374 }
375
376 static int get_protocol_http_header(enum protocol_version version,
377 struct strbuf *header)
378 {
379 if (version > 0) {
380 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
381 version);
382
383 return 1;
384 }
385
386 return 0;
387 }
388
389 static void check_smart_http(struct discovery *d, const char *service,
390 struct strbuf *type)
391 {
392 const char *p;
393 struct packet_reader reader;
394
395 /*
396 * If we don't see x-$service-advertisement, then it's not smart-http.
397 * But once we do, we commit to it and assume any other protocol
398 * violations are hard errors.
399 */
400 if (!skip_prefix(type->buf, "application/x-", &p) ||
401 !skip_prefix(p, service, &p) ||
402 strcmp(p, "-advertisement"))
403 return;
404
405 packet_reader_init(&reader, -1, d->buf, d->len,
406 PACKET_READ_CHOMP_NEWLINE |
407 PACKET_READ_DIE_ON_ERR_PACKET);
408 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
409 die(_("invalid server response; expected service, got flush packet"));
410
411 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
412 /*
413 * The header can include additional metadata lines, up
414 * until a packet flush marker. Ignore these now, but
415 * in the future we might start to scan them.
416 */
417 for (;;) {
418 packet_reader_read(&reader);
419 if (reader.pktlen <= 0) {
420 break;
421 }
422 }
423
424 /*
425 * v0 smart http; callers expect us to soak up the
426 * service and header packets
427 */
428 d->buf = reader.src_buffer;
429 d->len = reader.src_len;
430 d->proto_git = 1;
431
432 } else if (!strcmp(reader.line, "version 2")) {
433 /*
434 * v2 smart http; do not consume version packet, which will
435 * be handled elsewhere.
436 */
437 d->proto_git = 1;
438
439 } else {
440 die(_("invalid server response; got '%s'"), reader.line);
441 }
442 }
443
444 static struct discovery *discover_refs(const char *service, int for_push)
445 {
446 struct strbuf type = STRBUF_INIT;
447 struct strbuf charset = STRBUF_INIT;
448 struct strbuf buffer = STRBUF_INIT;
449 struct strbuf refs_url = STRBUF_INIT;
450 struct strbuf effective_url = STRBUF_INIT;
451 struct strbuf protocol_header = STRBUF_INIT;
452 struct string_list extra_headers = STRING_LIST_INIT_DUP;
453 struct discovery *last = last_discovery;
454 int http_ret, maybe_smart = 0;
455 struct http_get_options http_options;
456 enum protocol_version version = get_protocol_version_config();
457
458 if (last && !strcmp(service, last->service))
459 return last;
460 free_discovery(last);
461
462 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
463 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
464 git_env_bool("GIT_SMART_HTTP", 1)) {
465 maybe_smart = 1;
466 if (!strchr(url.buf, '?'))
467 strbuf_addch(&refs_url, '?');
468 else
469 strbuf_addch(&refs_url, '&');
470 strbuf_addf(&refs_url, "service=%s", service);
471 }
472
473 /*
474 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
475 * to perform a push, then fallback to v0 since the client doesn't know
476 * how to push yet using v2.
477 */
478 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
479 version = protocol_v0;
480
481 /* Add the extra Git-Protocol header */
482 if (get_protocol_http_header(version, &protocol_header))
483 string_list_append(&extra_headers, protocol_header.buf);
484
485 memset(&http_options, 0, sizeof(http_options));
486 http_options.content_type = &type;
487 http_options.charset = &charset;
488 http_options.effective_url = &effective_url;
489 http_options.base_url = &url;
490 http_options.extra_headers = &extra_headers;
491 http_options.initial_request = 1;
492 http_options.no_cache = 1;
493
494 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
495 switch (http_ret) {
496 case HTTP_OK:
497 break;
498 case HTTP_MISSING_TARGET:
499 show_http_message(&type, &charset, &buffer);
500 die(_("repository '%s' not found"),
501 transport_anonymize_url(url.buf));
502 case HTTP_NOAUTH:
503 show_http_message(&type, &charset, &buffer);
504 die(_("Authentication failed for '%s'"),
505 transport_anonymize_url(url.buf));
506 case HTTP_NOMATCHPUBLICKEY:
507 show_http_message(&type, &charset, &buffer);
508 die(_("unable to access '%s' with http.pinnedPubkey configuration: %s"),
509 transport_anonymize_url(url.buf), curl_errorstr);
510 default:
511 show_http_message(&type, &charset, &buffer);
512 die(_("unable to access '%s': %s"),
513 transport_anonymize_url(url.buf), curl_errorstr);
514 }
515
516 if (options.verbosity && !starts_with(refs_url.buf, url.buf)) {
517 char *u = transport_anonymize_url(url.buf);
518 warning(_("redirecting to %s"), u);
519 free(u);
520 }
521
522 last= xcalloc(1, sizeof(*last_discovery));
523 last->service = xstrdup(service);
524 last->buf_alloc = strbuf_detach(&buffer, &last->len);
525 last->buf = last->buf_alloc;
526
527 if (maybe_smart)
528 check_smart_http(last, service, &type);
529
530 if (last->proto_git)
531 last->refs = parse_git_refs(last, for_push);
532 else
533 last->refs = parse_info_refs(last);
534
535 strbuf_release(&refs_url);
536 strbuf_release(&type);
537 strbuf_release(&charset);
538 strbuf_release(&effective_url);
539 strbuf_release(&buffer);
540 strbuf_release(&protocol_header);
541 string_list_clear(&extra_headers, 0);
542 last_discovery = last;
543 return last;
544 }
545
546 static struct ref *get_refs(int for_push)
547 {
548 struct discovery *heads;
549
550 if (for_push)
551 heads = discover_refs("git-receive-pack", for_push);
552 else
553 heads = discover_refs("git-upload-pack", for_push);
554
555 return heads->refs;
556 }
557
558 static void output_refs(struct ref *refs)
559 {
560 struct ref *posn;
561 if (options.object_format && options.hash_algo) {
562 printf(":object-format %s\n", options.hash_algo->name);
563 repo_set_hash_algo(the_repository,
564 hash_algo_by_ptr(options.hash_algo));
565 }
566 for (posn = refs; posn; posn = posn->next) {
567 if (posn->symref)
568 printf("@%s %s\n", posn->symref, posn->name);
569 else
570 printf("%s %s\n", hash_to_hex_algop(posn->old_oid.hash,
571 options.hash_algo),
572 posn->name);
573 }
574 printf("\n");
575 fflush(stdout);
576 }
577
578 struct rpc_state {
579 const char *service_name;
580 char *service_url;
581 char *hdr_content_type;
582 char *hdr_accept;
583 char *protocol_header;
584 char *buf;
585 size_t alloc;
586 size_t len;
587 size_t pos;
588 int in;
589 int out;
590 int any_written;
591 unsigned gzip_request : 1;
592 unsigned initial_buffer : 1;
593
594 /*
595 * Whenever a pkt-line is read into buf, append the 4 characters
596 * denoting its length before appending the payload.
597 */
598 unsigned write_line_lengths : 1;
599
600 /*
601 * Used by rpc_out; initialize to 0. This is true if a flush has been
602 * read, but the corresponding line length (if write_line_lengths is
603 * true) and EOF have not been sent to libcurl. Since each flush marks
604 * the end of a request, each flush must be completely sent before any
605 * further reading occurs.
606 */
607 unsigned flush_read_but_not_sent : 1;
608 };
609
610 /*
611 * Appends the result of reading from rpc->out to the string represented by
612 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
613 * enough space, 0 otherwise.
614 *
615 * If rpc->write_line_lengths is true, appends the line length as a 4-byte
616 * hexadecimal string before appending the result described above.
617 *
618 * Writes the total number of bytes appended into appended.
619 */
620 static int rpc_read_from_out(struct rpc_state *rpc, int options,
621 size_t *appended,
622 enum packet_read_status *status) {
623 size_t left;
624 char *buf;
625 int pktlen_raw;
626
627 if (rpc->write_line_lengths) {
628 left = rpc->alloc - rpc->len - 4;
629 buf = rpc->buf + rpc->len + 4;
630 } else {
631 left = rpc->alloc - rpc->len;
632 buf = rpc->buf + rpc->len;
633 }
634
635 if (left < LARGE_PACKET_MAX)
636 return 0;
637
638 *status = packet_read_with_status(rpc->out, NULL, NULL, buf,
639 left, &pktlen_raw, options);
640 if (*status != PACKET_READ_EOF) {
641 *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0);
642 rpc->len += *appended;
643 }
644
645 if (rpc->write_line_lengths) {
646 switch (*status) {
647 case PACKET_READ_EOF:
648 if (!(options & PACKET_READ_GENTLE_ON_EOF))
649 die(_("shouldn't have EOF when not gentle on EOF"));
650 break;
651 case PACKET_READ_NORMAL:
652 set_packet_header(buf - 4, *appended);
653 break;
654 case PACKET_READ_DELIM:
655 memcpy(buf - 4, "0001", 4);
656 break;
657 case PACKET_READ_FLUSH:
658 memcpy(buf - 4, "0000", 4);
659 break;
660 case PACKET_READ_RESPONSE_END:
661 die(_("remote server sent unexpected response end packet"));
662 }
663 }
664
665 return 1;
666 }
667
668 static size_t rpc_out(void *ptr, size_t eltsize,
669 size_t nmemb, void *buffer_)
670 {
671 size_t max = eltsize * nmemb;
672 struct rpc_state *rpc = buffer_;
673 size_t avail = rpc->len - rpc->pos;
674 enum packet_read_status status;
675
676 if (!avail) {
677 rpc->initial_buffer = 0;
678 rpc->len = 0;
679 rpc->pos = 0;
680 if (!rpc->flush_read_but_not_sent) {
681 if (!rpc_read_from_out(rpc, 0, &avail, &status))
682 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
683 if (status == PACKET_READ_FLUSH)
684 rpc->flush_read_but_not_sent = 1;
685 }
686 /*
687 * If flush_read_but_not_sent is true, we have already read one
688 * full request but have not fully sent it + EOF, which is why
689 * we need to refrain from reading.
690 */
691 }
692 if (rpc->flush_read_but_not_sent) {
693 if (!avail) {
694 /*
695 * The line length either does not need to be sent at
696 * all or has already been completely sent. Now we can
697 * return 0, indicating EOF, meaning that the flush has
698 * been fully sent.
699 */
700 rpc->flush_read_but_not_sent = 0;
701 return 0;
702 }
703 /*
704 * If avail is non-zero, the line length for the flush still
705 * hasn't been fully sent. Proceed with sending the line
706 * length.
707 */
708 }
709
710 if (max < avail)
711 avail = max;
712 memcpy(ptr, rpc->buf + rpc->pos, avail);
713 rpc->pos += avail;
714 return avail;
715 }
716
717 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
718 {
719 struct rpc_state *rpc = clientp;
720
721 switch (cmd) {
722 case CURLIOCMD_NOP:
723 return CURLIOE_OK;
724
725 case CURLIOCMD_RESTARTREAD:
726 if (rpc->initial_buffer) {
727 rpc->pos = 0;
728 return CURLIOE_OK;
729 }
730 error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
731 return CURLIOE_FAILRESTART;
732
733 default:
734 return CURLIOE_UNKNOWNCMD;
735 }
736 }
737
738 struct check_pktline_state {
739 char len_buf[4];
740 int len_filled;
741 int remaining;
742 };
743
744 static void check_pktline(struct check_pktline_state *state, const char *ptr, size_t size)
745 {
746 while (size) {
747 if (!state->remaining) {
748 int digits_remaining = 4 - state->len_filled;
749 if (digits_remaining > size)
750 digits_remaining = size;
751 memcpy(&state->len_buf[state->len_filled], ptr, digits_remaining);
752 state->len_filled += digits_remaining;
753 ptr += digits_remaining;
754 size -= digits_remaining;
755
756 if (state->len_filled == 4) {
757 state->remaining = packet_length(state->len_buf);
758 if (state->remaining < 0) {
759 die(_("remote-curl: bad line length character: %.4s"), state->len_buf);
760 } else if (state->remaining == 2) {
761 die(_("remote-curl: unexpected response end packet"));
762 } else if (state->remaining < 4) {
763 state->remaining = 0;
764 } else {
765 state->remaining -= 4;
766 }
767 state->len_filled = 0;
768 }
769 }
770
771 if (state->remaining) {
772 int remaining = state->remaining;
773 if (remaining > size)
774 remaining = size;
775 ptr += remaining;
776 size -= remaining;
777 state->remaining -= remaining;
778 }
779 }
780 }
781
782 struct rpc_in_data {
783 struct rpc_state *rpc;
784 struct active_request_slot *slot;
785 int check_pktline;
786 struct check_pktline_state pktline_state;
787 };
788
789 /*
790 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
791 * from ptr.
792 */
793 static size_t rpc_in(char *ptr, size_t eltsize,
794 size_t nmemb, void *buffer_)
795 {
796 size_t size = eltsize * nmemb;
797 struct rpc_in_data *data = buffer_;
798 long response_code;
799
800 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
801 &response_code) != CURLE_OK)
802 return size;
803 if (response_code >= 300)
804 return size;
805 if (size)
806 data->rpc->any_written = 1;
807 if (data->check_pktline)
808 check_pktline(&data->pktline_state, ptr, size);
809 write_or_die(data->rpc->in, ptr, size);
810 return size;
811 }
812
813 static int run_slot(struct active_request_slot *slot,
814 struct slot_results *results)
815 {
816 int err;
817 struct slot_results results_buf;
818
819 if (!results)
820 results = &results_buf;
821
822 err = run_one_slot(slot, results);
823
824 if (err != HTTP_OK && err != HTTP_REAUTH) {
825 struct strbuf msg = STRBUF_INIT;
826 if (results->http_code && results->http_code != 200)
827 strbuf_addf(&msg, "HTTP %ld", results->http_code);
828 if (results->curl_result != CURLE_OK) {
829 if (msg.len)
830 strbuf_addch(&msg, ' ');
831 strbuf_addf(&msg, "curl %d", results->curl_result);
832 if (curl_errorstr[0]) {
833 strbuf_addch(&msg, ' ');
834 strbuf_addstr(&msg, curl_errorstr);
835 }
836 }
837 error(_("RPC failed; %s"), msg.buf);
838 strbuf_release(&msg);
839 }
840
841 return err;
842 }
843
844 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
845 {
846 struct active_request_slot *slot;
847 struct curl_slist *headers = http_copy_default_headers();
848 struct strbuf buf = STRBUF_INIT;
849 int err;
850
851 slot = get_active_slot();
852
853 headers = curl_slist_append(headers, rpc->hdr_content_type);
854 headers = curl_slist_append(headers, rpc->hdr_accept);
855
856 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
857 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
858 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
859 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
860 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
861 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
862 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
863 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
864 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &buf);
865
866 err = run_slot(slot, results);
867
868 curl_slist_free_all(headers);
869 strbuf_release(&buf);
870 return err;
871 }
872
873 static curl_off_t xcurl_off_t(size_t len)
874 {
875 uintmax_t size = len;
876 if (size > maximum_signed_value_of_type(curl_off_t))
877 die(_("cannot handle pushes this big"));
878 return (curl_off_t)size;
879 }
880
881 /*
882 * If flush_received is true, do not attempt to read any more; just use what's
883 * in rpc->buf.
884 */
885 static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received)
886 {
887 struct active_request_slot *slot;
888 struct curl_slist *headers = http_copy_default_headers();
889 int use_gzip = rpc->gzip_request;
890 char *gzip_body = NULL;
891 size_t gzip_size = 0;
892 int err, large_request = 0;
893 int needs_100_continue = 0;
894 struct rpc_in_data rpc_in_data;
895
896 /* Try to load the entire request, if we can fit it into the
897 * allocated buffer space we can use HTTP/1.0 and avoid the
898 * chunked encoding mess.
899 */
900 if (!flush_received) {
901 while (1) {
902 size_t n;
903 enum packet_read_status status;
904
905 if (!rpc_read_from_out(rpc, 0, &n, &status)) {
906 large_request = 1;
907 use_gzip = 0;
908 break;
909 }
910 if (status == PACKET_READ_FLUSH)
911 break;
912 }
913 }
914
915 if (large_request) {
916 struct slot_results results;
917
918 do {
919 err = probe_rpc(rpc, &results);
920 if (err == HTTP_REAUTH)
921 credential_fill(&http_auth);
922 } while (err == HTTP_REAUTH);
923 if (err != HTTP_OK)
924 return -1;
925
926 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
927 needs_100_continue = 1;
928 }
929
930 headers = curl_slist_append(headers, rpc->hdr_content_type);
931 headers = curl_slist_append(headers, rpc->hdr_accept);
932 headers = curl_slist_append(headers, needs_100_continue ?
933 "Expect: 100-continue" : "Expect:");
934
935 /* Add the extra Git-Protocol header */
936 if (rpc->protocol_header)
937 headers = curl_slist_append(headers, rpc->protocol_header);
938
939 retry:
940 slot = get_active_slot();
941
942 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
943 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
944 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
945 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
946
947 if (large_request) {
948 /* The request body is large and the size cannot be predicted.
949 * We must use chunked encoding to send it.
950 */
951 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
952 rpc->initial_buffer = 1;
953 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
954 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
955 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
956 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
957 if (options.verbosity > 1) {
958 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
959 fflush(stderr);
960 }
961
962 } else if (gzip_body) {
963 /*
964 * If we are looping to retry authentication, then the previous
965 * run will have set up the headers and gzip buffer already,
966 * and we just need to send it.
967 */
968 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
969 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
970
971 } else if (use_gzip && 1024 < rpc->len) {
972 /* The client backend isn't giving us compressed data so
973 * we can try to deflate it ourselves, this may save on
974 * the transfer time.
975 */
976 git_zstream stream;
977 int ret;
978
979 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
980 gzip_size = git_deflate_bound(&stream, rpc->len);
981 gzip_body = xmalloc(gzip_size);
982
983 stream.next_in = (unsigned char *)rpc->buf;
984 stream.avail_in = rpc->len;
985 stream.next_out = (unsigned char *)gzip_body;
986 stream.avail_out = gzip_size;
987
988 ret = git_deflate(&stream, Z_FINISH);
989 if (ret != Z_STREAM_END)
990 die(_("cannot deflate request; zlib deflate error %d"), ret);
991
992 ret = git_deflate_end_gently(&stream);
993 if (ret != Z_OK)
994 die(_("cannot deflate request; zlib end error %d"), ret);
995
996 gzip_size = stream.total_out;
997
998 headers = curl_slist_append(headers, "Content-Encoding: gzip");
999 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
1000 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
1001
1002 if (options.verbosity > 1) {
1003 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
1004 rpc->service_name,
1005 (unsigned long)rpc->len, (unsigned long)gzip_size);
1006 fflush(stderr);
1007 }
1008 } else {
1009 /* We know the complete request size in advance, use the
1010 * more normal Content-Length approach.
1011 */
1012 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
1013 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
1014 if (options.verbosity > 1) {
1015 fprintf(stderr, "POST %s (%lu bytes)\n",
1016 rpc->service_name, (unsigned long)rpc->len);
1017 fflush(stderr);
1018 }
1019 }
1020
1021 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1022 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
1023 rpc_in_data.rpc = rpc;
1024 rpc_in_data.slot = slot;
1025 rpc_in_data.check_pktline = stateless_connect;
1026 memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state));
1027 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &rpc_in_data);
1028 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1029
1030
1031 rpc->any_written = 0;
1032 err = run_slot(slot, NULL);
1033 if (err == HTTP_REAUTH && !large_request) {
1034 credential_fill(&http_auth);
1035 goto retry;
1036 }
1037 if (err != HTTP_OK)
1038 err = -1;
1039
1040 if (!rpc->any_written)
1041 err = -1;
1042
1043 if (rpc_in_data.pktline_state.len_filled)
1044 err = error(_("%d bytes of length header were received"), rpc_in_data.pktline_state.len_filled);
1045 if (rpc_in_data.pktline_state.remaining)
1046 err = error(_("%d bytes of body are still expected"), rpc_in_data.pktline_state.remaining);
1047
1048 if (stateless_connect)
1049 packet_response_end(rpc->in);
1050
1051 curl_slist_free_all(headers);
1052 free(gzip_body);
1053 return err;
1054 }
1055
1056 static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
1057 const char **client_argv, const struct strbuf *preamble,
1058 struct strbuf *rpc_result)
1059 {
1060 const char *svc = rpc->service_name;
1061 struct strbuf buf = STRBUF_INIT;
1062 struct child_process client = CHILD_PROCESS_INIT;
1063 int err = 0;
1064
1065 client.in = -1;
1066 client.out = -1;
1067 client.git_cmd = 1;
1068 strvec_pushv(&client.args, client_argv);
1069 if (start_command(&client))
1070 exit(1);
1071 write_or_die(client.in, preamble->buf, preamble->len);
1072 if (heads)
1073 write_or_die(client.in, heads->buf, heads->len);
1074
1075 rpc->alloc = http_post_buffer;
1076 rpc->buf = xmalloc(rpc->alloc);
1077 rpc->in = client.in;
1078 rpc->out = client.out;
1079
1080 strbuf_addf(&buf, "%s%s", url.buf, svc);
1081 rpc->service_url = strbuf_detach(&buf, NULL);
1082
1083 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
1084 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
1085
1086 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
1087 rpc->hdr_accept = strbuf_detach(&buf, NULL);
1088
1089 if (get_protocol_http_header(heads->version, &buf))
1090 rpc->protocol_header = strbuf_detach(&buf, NULL);
1091 else
1092 rpc->protocol_header = NULL;
1093
1094 while (!err) {
1095 int n = packet_read(rpc->out, rpc->buf, rpc->alloc, 0);
1096 if (!n)
1097 break;
1098 rpc->pos = 0;
1099 rpc->len = n;
1100 err |= post_rpc(rpc, 0, 0);
1101 }
1102
1103 close(client.in);
1104 client.in = -1;
1105 if (!err) {
1106 strbuf_read(rpc_result, client.out, 0);
1107 } else {
1108 char buf[4096];
1109 for (;;)
1110 if (xread(client.out, buf, sizeof(buf)) <= 0)
1111 break;
1112 }
1113
1114 close(client.out);
1115 client.out = -1;
1116
1117 err |= finish_command(&client);
1118 free(rpc->service_url);
1119 free(rpc->hdr_content_type);
1120 free(rpc->hdr_accept);
1121 free(rpc->protocol_header);
1122 free(rpc->buf);
1123 strbuf_release(&buf);
1124 return err;
1125 }
1126
1127 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
1128 {
1129 struct walker *walker;
1130 char **targets;
1131 int ret, i;
1132
1133 ALLOC_ARRAY(targets, nr_heads);
1134 if (options.depth || options.deepen_since)
1135 die(_("dumb http transport does not support shallow capabilities"));
1136 for (i = 0; i < nr_heads; i++)
1137 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
1138
1139 walker = get_http_walker(url.buf);
1140 walker->get_verbosely = options.verbosity >= 3;
1141 walker->get_progress = options.progress;
1142 walker->get_recover = 0;
1143 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
1144 walker_free(walker);
1145
1146 for (i = 0; i < nr_heads; i++)
1147 free(targets[i]);
1148 free(targets);
1149
1150 return ret ? error(_("fetch failed.")) : 0;
1151 }
1152
1153 static int fetch_git(struct discovery *heads,
1154 int nr_heads, struct ref **to_fetch)
1155 {
1156 struct rpc_state rpc;
1157 struct strbuf preamble = STRBUF_INIT;
1158 int i, err;
1159 struct strvec args = STRVEC_INIT;
1160 struct strbuf rpc_result = STRBUF_INIT;
1161
1162 strvec_pushl(&args, "fetch-pack", "--stateless-rpc",
1163 "--stdin", "--lock-pack", NULL);
1164 if (options.followtags)
1165 strvec_push(&args, "--include-tag");
1166 if (options.thin)
1167 strvec_push(&args, "--thin");
1168 if (options.verbosity >= 3)
1169 strvec_pushl(&args, "-v", "-v", NULL);
1170 if (options.check_self_contained_and_connected)
1171 strvec_push(&args, "--check-self-contained-and-connected");
1172 if (options.cloning)
1173 strvec_push(&args, "--cloning");
1174 if (options.update_shallow)
1175 strvec_push(&args, "--update-shallow");
1176 if (!options.progress)
1177 strvec_push(&args, "--no-progress");
1178 if (options.depth)
1179 strvec_pushf(&args, "--depth=%lu", options.depth);
1180 if (options.deepen_since)
1181 strvec_pushf(&args, "--shallow-since=%s", options.deepen_since);
1182 for (i = 0; i < options.deepen_not.nr; i++)
1183 strvec_pushf(&args, "--shallow-exclude=%s",
1184 options.deepen_not.items[i].string);
1185 if (options.deepen_relative && options.depth)
1186 strvec_push(&args, "--deepen-relative");
1187 if (options.from_promisor)
1188 strvec_push(&args, "--from-promisor");
1189 if (options.refetch)
1190 strvec_push(&args, "--refetch");
1191 if (options.filter)
1192 strvec_pushf(&args, "--filter=%s", options.filter);
1193 strvec_push(&args, url.buf);
1194
1195 for (i = 0; i < nr_heads; i++) {
1196 struct ref *ref = to_fetch[i];
1197 if (!*ref->name)
1198 die(_("cannot fetch by sha1 over smart http"));
1199 packet_buf_write(&preamble, "%s %s\n",
1200 oid_to_hex(&ref->old_oid), ref->name);
1201 }
1202 packet_buf_flush(&preamble);
1203
1204 memset(&rpc, 0, sizeof(rpc));
1205 rpc.service_name = "git-upload-pack",
1206 rpc.gzip_request = 1;
1207
1208 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1209 if (rpc_result.len)
1210 write_or_die(1, rpc_result.buf, rpc_result.len);
1211 strbuf_release(&rpc_result);
1212 strbuf_release(&preamble);
1213 strvec_clear(&args);
1214 return err;
1215 }
1216
1217 static int fetch(int nr_heads, struct ref **to_fetch)
1218 {
1219 struct discovery *d = discover_refs("git-upload-pack", 0);
1220 if (d->proto_git)
1221 return fetch_git(d, nr_heads, to_fetch);
1222 else
1223 return fetch_dumb(nr_heads, to_fetch);
1224 }
1225
1226 static void parse_fetch(struct strbuf *buf)
1227 {
1228 struct ref **to_fetch = NULL;
1229 struct ref *list_head = NULL;
1230 struct ref **list = &list_head;
1231 int alloc_heads = 0, nr_heads = 0;
1232
1233 do {
1234 const char *p;
1235 if (skip_prefix(buf->buf, "fetch ", &p)) {
1236 const char *name;
1237 struct ref *ref;
1238 struct object_id old_oid;
1239 const char *q;
1240
1241 if (parse_oid_hex(p, &old_oid, &q))
1242 die(_("protocol error: expected sha/ref, got '%s'"), p);
1243 if (*q == ' ')
1244 name = q + 1;
1245 else if (!*q)
1246 name = "";
1247 else
1248 die(_("protocol error: expected sha/ref, got '%s'"), p);
1249
1250 ref = alloc_ref(name);
1251 oidcpy(&ref->old_oid, &old_oid);
1252
1253 *list = ref;
1254 list = &ref->next;
1255
1256 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1257 to_fetch[nr_heads++] = ref;
1258 }
1259 else
1260 die(_("http transport does not support %s"), buf->buf);
1261
1262 strbuf_reset(buf);
1263 if (strbuf_getline_lf(buf, stdin) == EOF)
1264 return;
1265 if (!*buf->buf)
1266 break;
1267 } while (1);
1268
1269 if (fetch(nr_heads, to_fetch))
1270 exit(128); /* error already reported */
1271 free_refs(list_head);
1272 free(to_fetch);
1273
1274 printf("\n");
1275 fflush(stdout);
1276 strbuf_reset(buf);
1277 }
1278
1279 static int push_dav(int nr_spec, const char **specs)
1280 {
1281 struct child_process child = CHILD_PROCESS_INIT;
1282 size_t i;
1283
1284 child.git_cmd = 1;
1285 strvec_push(&child.args, "http-push");
1286 strvec_push(&child.args, "--helper-status");
1287 if (options.dry_run)
1288 strvec_push(&child.args, "--dry-run");
1289 if (options.verbosity > 1)
1290 strvec_push(&child.args, "--verbose");
1291 strvec_push(&child.args, url.buf);
1292 for (i = 0; i < nr_spec; i++)
1293 strvec_push(&child.args, specs[i]);
1294
1295 if (run_command(&child))
1296 die(_("git-http-push failed"));
1297 return 0;
1298 }
1299
1300 static int push_git(struct discovery *heads, int nr_spec, const char **specs)
1301 {
1302 struct rpc_state rpc;
1303 int i, err;
1304 struct strvec args;
1305 struct string_list_item *cas_option;
1306 struct strbuf preamble = STRBUF_INIT;
1307 struct strbuf rpc_result = STRBUF_INIT;
1308
1309 strvec_init(&args);
1310 strvec_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1311 NULL);
1312
1313 if (options.thin)
1314 strvec_push(&args, "--thin");
1315 if (options.dry_run)
1316 strvec_push(&args, "--dry-run");
1317 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1318 strvec_push(&args, "--signed=yes");
1319 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1320 strvec_push(&args, "--signed=if-asked");
1321 if (options.atomic)
1322 strvec_push(&args, "--atomic");
1323 if (options.verbosity == 0)
1324 strvec_push(&args, "--quiet");
1325 else if (options.verbosity > 1)
1326 strvec_push(&args, "--verbose");
1327 for (i = 0; i < options.push_options.nr; i++)
1328 strvec_pushf(&args, "--push-option=%s",
1329 options.push_options.items[i].string);
1330 strvec_push(&args, options.progress ? "--progress" : "--no-progress");
1331 for_each_string_list_item(cas_option, &cas_options)
1332 strvec_push(&args, cas_option->string);
1333 strvec_push(&args, url.buf);
1334
1335 if (options.force_if_includes)
1336 strvec_push(&args, "--force-if-includes");
1337
1338 strvec_push(&args, "--stdin");
1339 for (i = 0; i < nr_spec; i++)
1340 packet_buf_write(&preamble, "%s\n", specs[i]);
1341 packet_buf_flush(&preamble);
1342
1343 memset(&rpc, 0, sizeof(rpc));
1344 rpc.service_name = "git-receive-pack",
1345
1346 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1347 if (rpc_result.len)
1348 write_or_die(1, rpc_result.buf, rpc_result.len);
1349 strbuf_release(&rpc_result);
1350 strbuf_release(&preamble);
1351 strvec_clear(&args);
1352 return err;
1353 }
1354
1355 static int push(int nr_spec, const char **specs)
1356 {
1357 struct discovery *heads = discover_refs("git-receive-pack", 1);
1358 int ret;
1359
1360 if (heads->proto_git)
1361 ret = push_git(heads, nr_spec, specs);
1362 else
1363 ret = push_dav(nr_spec, specs);
1364 free_discovery(heads);
1365 return ret;
1366 }
1367
1368 static void parse_push(struct strbuf *buf)
1369 {
1370 struct strvec specs = STRVEC_INIT;
1371 int ret;
1372
1373 do {
1374 const char *arg;
1375 if (skip_prefix(buf->buf, "push ", &arg))
1376 strvec_push(&specs, arg);
1377 else
1378 die(_("http transport does not support %s"), buf->buf);
1379
1380 strbuf_reset(buf);
1381 if (strbuf_getline_lf(buf, stdin) == EOF)
1382 goto free_specs;
1383 if (!*buf->buf)
1384 break;
1385 } while (1);
1386
1387 ret = push(specs.nr, specs.v);
1388 printf("\n");
1389 fflush(stdout);
1390
1391 if (ret)
1392 exit(128); /* error already reported */
1393
1394 free_specs:
1395 strvec_clear(&specs);
1396 }
1397
1398 static int stateless_connect(const char *service_name)
1399 {
1400 struct discovery *discover;
1401 struct rpc_state rpc;
1402 struct strbuf buf = STRBUF_INIT;
1403
1404 /*
1405 * Run the info/refs request and see if the server supports protocol
1406 * v2. If and only if the server supports v2 can we successfully
1407 * establish a stateless connection, otherwise we need to tell the
1408 * client to fallback to using other transport helper functions to
1409 * complete their request.
1410 */
1411 discover = discover_refs(service_name, 0);
1412 if (discover->version != protocol_v2) {
1413 printf("fallback\n");
1414 fflush(stdout);
1415 return -1;
1416 } else {
1417 /* Stateless Connection established */
1418 printf("\n");
1419 fflush(stdout);
1420 }
1421
1422 rpc.service_name = service_name;
1423 rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name);
1424 rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name);
1425 rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name);
1426 if (get_protocol_http_header(discover->version, &buf)) {
1427 rpc.protocol_header = strbuf_detach(&buf, NULL);
1428 } else {
1429 rpc.protocol_header = NULL;
1430 strbuf_release(&buf);
1431 }
1432 rpc.buf = xmalloc(http_post_buffer);
1433 rpc.alloc = http_post_buffer;
1434 rpc.len = 0;
1435 rpc.pos = 0;
1436 rpc.in = 1;
1437 rpc.out = 0;
1438 rpc.any_written = 0;
1439 rpc.gzip_request = 1;
1440 rpc.initial_buffer = 0;
1441 rpc.write_line_lengths = 1;
1442 rpc.flush_read_but_not_sent = 0;
1443
1444 /*
1445 * Dump the capability listing that we got from the server earlier
1446 * during the info/refs request.
1447 */
1448 write_or_die(rpc.in, discover->buf, discover->len);
1449
1450 /* Until we see EOF keep sending POSTs */
1451 while (1) {
1452 size_t avail;
1453 enum packet_read_status status;
1454
1455 if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail,
1456 &status))
1457 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
1458 if (status == PACKET_READ_EOF)
1459 break;
1460 if (post_rpc(&rpc, 1, status == PACKET_READ_FLUSH))
1461 /* We would have an err here */
1462 break;
1463 /* Reset the buffer for next request */
1464 rpc.len = 0;
1465 }
1466
1467 free(rpc.service_url);
1468 free(rpc.hdr_content_type);
1469 free(rpc.hdr_accept);
1470 free(rpc.protocol_header);
1471 free(rpc.buf);
1472 strbuf_release(&buf);
1473
1474 return 0;
1475 }
1476
1477 int cmd_main(int argc, const char **argv)
1478 {
1479 struct strbuf buf = STRBUF_INIT;
1480 int nongit;
1481 int ret = 1;
1482
1483 setup_git_directory_gently(&nongit);
1484 if (argc < 2) {
1485 error(_("remote-curl: usage: git remote-curl <remote> [<url>]"));
1486 goto cleanup;
1487 }
1488
1489 options.verbosity = 1;
1490 options.progress = !!isatty(2);
1491 options.thin = 1;
1492 string_list_init_dup(&options.deepen_not);
1493 string_list_init_dup(&options.push_options);
1494
1495 /*
1496 * Just report "remote-curl" here (folding all the various aliases
1497 * ("git-remote-http", "git-remote-https", and etc.) here since they
1498 * are all just copies of the same actual executable.
1499 */
1500 trace2_cmd_name("remote-curl");
1501
1502 remote = remote_get(argv[1]);
1503
1504 if (argc > 2) {
1505 end_url_with_slash(&url, argv[2]);
1506 } else {
1507 end_url_with_slash(&url, remote->url[0]);
1508 }
1509
1510 http_init(remote, url.buf, 0);
1511
1512 do {
1513 const char *arg;
1514
1515 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1516 if (ferror(stdin))
1517 error(_("remote-curl: error reading command stream from git"));
1518 goto cleanup;
1519 }
1520 if (buf.len == 0)
1521 break;
1522 if (starts_with(buf.buf, "fetch ")) {
1523 if (nongit)
1524 die(_("remote-curl: fetch attempted without a local repo"));
1525 parse_fetch(&buf);
1526
1527 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1528 int for_push = !!strstr(buf.buf + 4, "for-push");
1529 output_refs(get_refs(for_push));
1530
1531 } else if (starts_with(buf.buf, "push ")) {
1532 parse_push(&buf);
1533
1534 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1535 char *value = strchr(arg, ' ');
1536 int result;
1537
1538 if (value)
1539 *value++ = '\0';
1540 else
1541 value = "true";
1542
1543 result = set_option(arg, value);
1544 if (!result)
1545 printf("ok\n");
1546 else if (result < 0)
1547 printf("error invalid value\n");
1548 else
1549 printf("unsupported\n");
1550 fflush(stdout);
1551
1552 } else if (!strcmp(buf.buf, "capabilities")) {
1553 printf("stateless-connect\n");
1554 printf("fetch\n");
1555 printf("option\n");
1556 printf("push\n");
1557 printf("check-connectivity\n");
1558 printf("object-format\n");
1559 printf("\n");
1560 fflush(stdout);
1561 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1562 if (!stateless_connect(arg))
1563 break;
1564 } else {
1565 error(_("remote-curl: unknown command '%s' from git"), buf.buf);
1566 goto cleanup;
1567 }
1568 strbuf_reset(&buf);
1569 } while (1);
1570
1571 http_cleanup();
1572 ret = 0;
1573 cleanup:
1574 strbuf_release(&buf);
1575
1576 return ret;
1577 }
git for Debian