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The twentieth batch
[alt-git.git] / remote-curl.c
blob0b6d7815fddd1e36be4aae007d5109cf5ba32cf1
1 #include "git-compat-util.h"
2 #include "git-curl-compat.h"
3 #include "config.h"
4 #include "environment.h"
5 #include "gettext.h"
6 #include "hex.h"
7 #include "remote.h"
8 #include "connect.h"
9 #include "strbuf.h"
10 #include "walker.h"
11 #include "http.h"
12 #include "run-command.h"
13 #include "pkt-line.h"
14 #include "string-list.h"
15 #include "strvec.h"
16 #include "credential.h"
17 #include "oid-array.h"
18 #include "send-pack.h"
19 #include "setup.h"
20 #include "protocol.h"
21 #include "quote.h"
22 #include "trace2.h"
23 #include "transport.h"
24 #include "url.h"
25 #include "write-or-die.h"
26
27 static struct remote *remote;
28 /* always ends with a trailing slash */
29 static struct strbuf url = STRBUF_INIT;
30
31 struct options {
32 int verbosity;
33 unsigned long depth;
34 char *deepen_since;
35 struct string_list deepen_not;
36 struct string_list push_options;
37 char *filter;
38 unsigned progress : 1,
39 check_self_contained_and_connected : 1,
40 cloning : 1,
41 update_shallow : 1,
42 followtags : 1,
43 dry_run : 1,
44 thin : 1,
45 /* One of the SEND_PACK_PUSH_CERT_* constants. */
46 push_cert : 2,
47 deepen_relative : 1,
48
49 /* see documentation of corresponding flag in fetch-pack.h */
50 from_promisor : 1,
51
52 refetch : 1,
53 atomic : 1,
54 object_format : 1,
55 force_if_includes : 1;
56 const struct git_hash_algo *hash_algo;
57 };
58 static struct options options;
59 static struct string_list cas_options = STRING_LIST_INIT_DUP;
60
61 static int set_option(const char *name, const char *value)
62 {
63 if (!strcmp(name, "verbosity")) {
64 char *end;
65 int v = strtol(value, &end, 10);
66 if (value == end || *end)
67 return -1;
68 options.verbosity = v;
69 return 0;
70 }
71 else if (!strcmp(name, "progress")) {
72 if (!strcmp(value, "true"))
73 options.progress = 1;
74 else if (!strcmp(value, "false"))
75 options.progress = 0;
76 else
77 return -1;
78 return 0;
79 }
80 else if (!strcmp(name, "depth")) {
81 char *end;
82 unsigned long v = strtoul(value, &end, 10);
83 if (value == end || *end)
84 return -1;
85 options.depth = v;
86 return 0;
87 }
88 else if (!strcmp(name, "deepen-since")) {
89 options.deepen_since = xstrdup(value);
90 return 0;
91 }
92 else if (!strcmp(name, "deepen-not")) {
93 string_list_append(&options.deepen_not, value);
94 return 0;
95 }
96 else if (!strcmp(name, "deepen-relative")) {
97 if (!strcmp(value, "true"))
98 options.deepen_relative = 1;
99 else if (!strcmp(value, "false"))
100 options.deepen_relative = 0;
101 else
102 return -1;
103 return 0;
104 }
105 else if (!strcmp(name, "followtags")) {
106 if (!strcmp(value, "true"))
107 options.followtags = 1;
108 else if (!strcmp(value, "false"))
109 options.followtags = 0;
110 else
111 return -1;
112 return 0;
113 }
114 else if (!strcmp(name, "dry-run")) {
115 if (!strcmp(value, "true"))
116 options.dry_run = 1;
117 else if (!strcmp(value, "false"))
118 options.dry_run = 0;
119 else
120 return -1;
121 return 0;
122 }
123 else if (!strcmp(name, "check-connectivity")) {
124 if (!strcmp(value, "true"))
125 options.check_self_contained_and_connected = 1;
126 else if (!strcmp(value, "false"))
127 options.check_self_contained_and_connected = 0;
128 else
129 return -1;
130 return 0;
131 }
132 else if (!strcmp(name, "cas")) {
133 struct strbuf val = STRBUF_INIT;
134 strbuf_addstr(&val, "--force-with-lease=");
135 if (*value != '"')
136 strbuf_addstr(&val, value);
137 else if (unquote_c_style(&val, value, NULL))
138 return -1;
139 string_list_append(&cas_options, val.buf);
140 strbuf_release(&val);
141 return 0;
142 } else if (!strcmp(name, TRANS_OPT_FORCE_IF_INCLUDES)) {
143 if (!strcmp(value, "true"))
144 options.force_if_includes = 1;
145 else if (!strcmp(value, "false"))
146 options.force_if_includes = 0;
147 else
148 return -1;
149 return 0;
150 } else if (!strcmp(name, "cloning")) {
151 if (!strcmp(value, "true"))
152 options.cloning = 1;
153 else if (!strcmp(value, "false"))
154 options.cloning = 0;
155 else
156 return -1;
157 return 0;
158 } else if (!strcmp(name, "update-shallow")) {
159 if (!strcmp(value, "true"))
160 options.update_shallow = 1;
161 else if (!strcmp(value, "false"))
162 options.update_shallow = 0;
163 else
164 return -1;
165 return 0;
166 } else if (!strcmp(name, "pushcert")) {
167 if (!strcmp(value, "true"))
168 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
169 else if (!strcmp(value, "false"))
170 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
171 else if (!strcmp(value, "if-asked"))
172 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
173 else
174 return -1;
175 return 0;
176 } else if (!strcmp(name, "atomic")) {
177 if (!strcmp(value, "true"))
178 options.atomic = 1;
179 else if (!strcmp(value, "false"))
180 options.atomic = 0;
181 else
182 return -1;
183 return 0;
184 } else if (!strcmp(name, "push-option")) {
185 if (*value != '"')
186 string_list_append(&options.push_options, value);
187 else {
188 struct strbuf unquoted = STRBUF_INIT;
189 if (unquote_c_style(&unquoted, value, NULL) < 0)
190 die(_("invalid quoting in push-option value: '%s'"), value);
191 string_list_append_nodup(&options.push_options,
192 strbuf_detach(&unquoted, NULL));
193 }
194 return 0;
195 } else if (!strcmp(name, "family")) {
196 if (!strcmp(value, "ipv4"))
197 git_curl_ipresolve = CURL_IPRESOLVE_V4;
198 else if (!strcmp(value, "ipv6"))
199 git_curl_ipresolve = CURL_IPRESOLVE_V6;
200 else if (!strcmp(value, "all"))
201 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
202 else
203 return -1;
204 return 0;
205 } else if (!strcmp(name, "from-promisor")) {
206 options.from_promisor = 1;
207 return 0;
208 } else if (!strcmp(name, "refetch")) {
209 options.refetch = 1;
210 return 0;
211 } else if (!strcmp(name, "filter")) {
212 options.filter = xstrdup(value);
213 return 0;
214 } else if (!strcmp(name, "object-format")) {
215 options.object_format = 1;
216 if (strcmp(value, "true"))
217 die(_("unknown value for object-format: %s"), value);
218 return 0;
219 } else {
220 return 1 /* unsupported */;
221 }
222 }
223
224 struct discovery {
225 char *service;
226 char *buf_alloc;
227 char *buf;
228 size_t len;
229 struct ref *refs;
230 struct oid_array shallow;
231 enum protocol_version version;
232 unsigned proto_git : 1;
233 };
234 static struct discovery *last_discovery;
235
236 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
237 {
238 struct ref *list = NULL;
239 struct packet_reader reader;
240
241 packet_reader_init(&reader, -1, heads->buf, heads->len,
242 PACKET_READ_CHOMP_NEWLINE |
243 PACKET_READ_GENTLE_ON_EOF |
244 PACKET_READ_DIE_ON_ERR_PACKET);
245
246 heads->version = discover_version(&reader);
247 switch (heads->version) {
248 case protocol_v2:
249 /*
250 * Do nothing. This isn't a list of refs but rather a
251 * capability advertisement. Client would have run
252 * 'stateless-connect' so we'll dump this capability listing
253 * and let them request the refs themselves.
254 */
255 break;
256 case protocol_v1:
257 case protocol_v0:
258 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
259 NULL, &heads->shallow);
260 options.hash_algo = reader.hash_algo;
261 break;
262 case protocol_unknown_version:
263 BUG("unknown protocol version");
264 }
265
266 return list;
267 }
268
269 static const struct git_hash_algo *detect_hash_algo(struct discovery *heads)
270 {
271 const char *p = memchr(heads->buf, '\t', heads->len);
272 int algo;
273 if (!p)
274 return the_hash_algo;
275
276 algo = hash_algo_by_length((p - heads->buf) / 2);
277 if (algo == GIT_HASH_UNKNOWN)
278 return NULL;
279 return &hash_algos[algo];
280 }
281
282 static struct ref *parse_info_refs(struct discovery *heads)
283 {
284 char *data, *start, *mid;
285 char *ref_name;
286 int i = 0;
287
288 struct ref *refs = NULL;
289 struct ref *ref = NULL;
290 struct ref *last_ref = NULL;
291
292 options.hash_algo = detect_hash_algo(heads);
293 if (!options.hash_algo)
294 die("%sinfo/refs not valid: could not determine hash algorithm; "
295 "is this a git repository?",
296 transport_anonymize_url(url.buf));
297
298 data = heads->buf;
299 start = NULL;
300 mid = data;
301 while (i < heads->len) {
302 if (!start) {
303 start = &data[i];
304 }
305 if (data[i] == '\t')
306 mid = &data[i];
307 if (data[i] == '\n') {
308 if (mid - start != options.hash_algo->hexsz)
309 die(_("%sinfo/refs not valid: is this a git repository?"),
310 transport_anonymize_url(url.buf));
311 data[i] = 0;
312 ref_name = mid + 1;
313 ref = alloc_ref(ref_name);
314 get_oid_hex_algop(start, &ref->old_oid, options.hash_algo);
315 if (!refs)
316 refs = ref;
317 if (last_ref)
318 last_ref->next = ref;
319 last_ref = ref;
320 start = NULL;
321 }
322 i++;
323 }
324
325 ref = alloc_ref("HEAD");
326 if (!http_fetch_ref(url.buf, ref) &&
327 !resolve_remote_symref(ref, refs)) {
328 ref->next = refs;
329 refs = ref;
330 } else {
331 free(ref);
332 }
333
334 return refs;
335 }
336
337 static void free_discovery(struct discovery *d)
338 {
339 if (d) {
340 if (d == last_discovery)
341 last_discovery = NULL;
342 free(d->shallow.oid);
343 free(d->buf_alloc);
344 free_refs(d->refs);
345 free(d->service);
346 free(d);
347 }
348 }
349
350 static int show_http_message(struct strbuf *type, struct strbuf *charset,
351 struct strbuf *msg)
352 {
353 const char *p, *eol;
354
355 /*
356 * We only show text/plain parts, as other types are likely
357 * to be ugly to look at on the user's terminal.
358 */
359 if (strcmp(type->buf, "text/plain"))
360 return -1;
361 if (charset->len)
362 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
363
364 strbuf_trim(msg);
365 if (!msg->len)
366 return -1;
367
368 p = msg->buf;
369 do {
370 eol = strchrnul(p, '\n');
371 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
372 p = eol + 1;
373 } while(*eol);
374 return 0;
375 }
376
377 static int get_protocol_http_header(enum protocol_version version,
378 struct strbuf *header)
379 {
380 if (version > 0) {
381 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
382 version);
383
384 return 1;
385 }
386
387 return 0;
388 }
389
390 static void check_smart_http(struct discovery *d, const char *service,
391 struct strbuf *type)
392 {
393 const char *p;
394 struct packet_reader reader;
395
396 /*
397 * If we don't see x-$service-advertisement, then it's not smart-http.
398 * But once we do, we commit to it and assume any other protocol
399 * violations are hard errors.
400 */
401 if (!skip_prefix(type->buf, "application/x-", &p) ||
402 !skip_prefix(p, service, &p) ||
403 strcmp(p, "-advertisement"))
404 return;
405
406 packet_reader_init(&reader, -1, d->buf, d->len,
407 PACKET_READ_CHOMP_NEWLINE |
408 PACKET_READ_DIE_ON_ERR_PACKET);
409 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
410 die(_("invalid server response; expected service, got flush packet"));
411
412 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
413 /*
414 * The header can include additional metadata lines, up
415 * until a packet flush marker. Ignore these now, but
416 * in the future we might start to scan them.
417 */
418 for (;;) {
419 packet_reader_read(&reader);
420 if (reader.pktlen <= 0) {
421 break;
422 }
423 }
424
425 /*
426 * v0 smart http; callers expect us to soak up the
427 * service and header packets
428 */
429 d->buf = reader.src_buffer;
430 d->len = reader.src_len;
431 d->proto_git = 1;
432
433 } else if (!strcmp(reader.line, "version 2")) {
434 /*
435 * v2 smart http; do not consume version packet, which will
436 * be handled elsewhere.
437 */
438 d->proto_git = 1;
439
440 } else {
441 die(_("invalid server response; got '%s'"), reader.line);
442 }
443 }
444
445 static struct discovery *discover_refs(const char *service, int for_push)
446 {
447 struct strbuf type = STRBUF_INIT;
448 struct strbuf charset = STRBUF_INIT;
449 struct strbuf buffer = STRBUF_INIT;
450 struct strbuf refs_url = STRBUF_INIT;
451 struct strbuf effective_url = STRBUF_INIT;
452 struct strbuf protocol_header = STRBUF_INIT;
453 struct string_list extra_headers = STRING_LIST_INIT_DUP;
454 struct discovery *last = last_discovery;
455 int http_ret, maybe_smart = 0;
456 struct http_get_options http_options;
457 enum protocol_version version = get_protocol_version_config();
458
459 if (last && !strcmp(service, last->service))
460 return last;
461 free_discovery(last);
462
463 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
464 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
465 git_env_bool("GIT_SMART_HTTP", 1)) {
466 maybe_smart = 1;
467 if (!strchr(url.buf, '?'))
468 strbuf_addch(&refs_url, '?');
469 else
470 strbuf_addch(&refs_url, '&');
471 strbuf_addf(&refs_url, "service=%s", service);
472 }
473
474 /*
475 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
476 * to perform any operation that doesn't involve upload-pack (i.e., a
477 * fetch, ls-remote, etc), then fallback to v0 since we don't know how
478 * to do anything else (like push or remote archive) via v2.
479 */
480 if (version == protocol_v2 && strcmp("git-upload-pack", service))
481 version = protocol_v0;
482
483 /* Add the extra Git-Protocol header */
484 if (get_protocol_http_header(version, &protocol_header))
485 string_list_append(&extra_headers, protocol_header.buf);
486
487 memset(&http_options, 0, sizeof(http_options));
488 http_options.content_type = &type;
489 http_options.charset = &charset;
490 http_options.effective_url = &effective_url;
491 http_options.base_url = &url;
492 http_options.extra_headers = &extra_headers;
493 http_options.initial_request = 1;
494 http_options.no_cache = 1;
495
496 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
497 switch (http_ret) {
498 case HTTP_OK:
499 break;
500 case HTTP_MISSING_TARGET:
501 show_http_message(&type, &charset, &buffer);
502 die(_("repository '%s' not found"),
503 transport_anonymize_url(url.buf));
504 case HTTP_NOAUTH:
505 show_http_message(&type, &charset, &buffer);
506 die(_("Authentication failed for '%s'"),
507 transport_anonymize_url(url.buf));
508 case HTTP_NOMATCHPUBLICKEY:
509 show_http_message(&type, &charset, &buffer);
510 die(_("unable to access '%s' with http.pinnedPubkey configuration: %s"),
511 transport_anonymize_url(url.buf), curl_errorstr);
512 default:
513 show_http_message(&type, &charset, &buffer);
514 die(_("unable to access '%s': %s"),
515 transport_anonymize_url(url.buf), curl_errorstr);
516 }
517
518 if (options.verbosity && !starts_with(refs_url.buf, url.buf)) {
519 char *u = transport_anonymize_url(url.buf);
520 warning(_("redirecting to %s"), u);
521 free(u);
522 }
523
524 last= xcalloc(1, sizeof(*last_discovery));
525 last->service = xstrdup(service);
526 last->buf_alloc = strbuf_detach(&buffer, &last->len);
527 last->buf = last->buf_alloc;
528
529 if (maybe_smart)
530 check_smart_http(last, service, &type);
531
532 if (last->proto_git)
533 last->refs = parse_git_refs(last, for_push);
534 else
535 last->refs = parse_info_refs(last);
536
537 strbuf_release(&refs_url);
538 strbuf_release(&type);
539 strbuf_release(&charset);
540 strbuf_release(&effective_url);
541 strbuf_release(&buffer);
542 strbuf_release(&protocol_header);
543 string_list_clear(&extra_headers, 0);
544 last_discovery = last;
545 return last;
546 }
547
548 static struct ref *get_refs(int for_push)
549 {
550 struct discovery *heads;
551
552 if (for_push)
553 heads = discover_refs("git-receive-pack", for_push);
554 else
555 heads = discover_refs("git-upload-pack", for_push);
556
557 return heads->refs;
558 }
559
560 static void output_refs(struct ref *refs)
561 {
562 struct ref *posn;
563 if (options.object_format && options.hash_algo) {
564 printf(":object-format %s\n", options.hash_algo->name);
565 repo_set_hash_algo(the_repository,
566 hash_algo_by_ptr(options.hash_algo));
567 }
568 for (posn = refs; posn; posn = posn->next) {
569 if (posn->symref)
570 printf("@%s %s\n", posn->symref, posn->name);
571 else
572 printf("%s %s\n", hash_to_hex_algop(posn->old_oid.hash,
573 options.hash_algo),
574 posn->name);
575 }
576 printf("\n");
577 fflush(stdout);
578 }
579
580 struct rpc_state {
581 const char *service_name;
582 char *service_url;
583 char *hdr_content_type;
584 char *hdr_accept;
585 char *hdr_accept_language;
586 char *protocol_header;
587 char *buf;
588 size_t alloc;
589 size_t len;
590 size_t pos;
591 int in;
592 int out;
593 int any_written;
594 unsigned gzip_request : 1;
595 unsigned initial_buffer : 1;
596
597 /*
598 * Whenever a pkt-line is read into buf, append the 4 characters
599 * denoting its length before appending the payload.
600 */
601 unsigned write_line_lengths : 1;
602
603 /*
604 * Used by rpc_out; initialize to 0. This is true if a flush has been
605 * read, but the corresponding line length (if write_line_lengths is
606 * true) and EOF have not been sent to libcurl. Since each flush marks
607 * the end of a request, each flush must be completely sent before any
608 * further reading occurs.
609 */
610 unsigned flush_read_but_not_sent : 1;
611 };
612
613 #define RPC_STATE_INIT { 0 }
614
615 /*
616 * Appends the result of reading from rpc->out to the string represented by
617 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
618 * enough space, 0 otherwise.
619 *
620 * If rpc->write_line_lengths is true, appends the line length as a 4-byte
621 * hexadecimal string before appending the result described above.
622 *
623 * Writes the total number of bytes appended into appended.
624 */
625 static int rpc_read_from_out(struct rpc_state *rpc, int options,
626 size_t *appended,
627 enum packet_read_status *status) {
628 size_t left;
629 char *buf;
630 int pktlen_raw;
631
632 if (rpc->write_line_lengths) {
633 left = rpc->alloc - rpc->len - 4;
634 buf = rpc->buf + rpc->len + 4;
635 } else {
636 left = rpc->alloc - rpc->len;
637 buf = rpc->buf + rpc->len;
638 }
639
640 if (left < LARGE_PACKET_MAX)
641 return 0;
642
643 *status = packet_read_with_status(rpc->out, NULL, NULL, buf,
644 left, &pktlen_raw, options);
645 if (*status != PACKET_READ_EOF) {
646 *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0);
647 rpc->len += *appended;
648 }
649
650 if (rpc->write_line_lengths) {
651 switch (*status) {
652 case PACKET_READ_EOF:
653 if (!(options & PACKET_READ_GENTLE_ON_EOF))
654 die(_("shouldn't have EOF when not gentle on EOF"));
655 break;
656 case PACKET_READ_NORMAL:
657 set_packet_header(buf - 4, *appended);
658 break;
659 case PACKET_READ_DELIM:
660 memcpy(buf - 4, "0001", 4);
661 break;
662 case PACKET_READ_FLUSH:
663 memcpy(buf - 4, "0000", 4);
664 break;
665 case PACKET_READ_RESPONSE_END:
666 die(_("remote server sent unexpected response end packet"));
667 }
668 }
669
670 return 1;
671 }
672
673 static size_t rpc_out(void *ptr, size_t eltsize,
674 size_t nmemb, void *buffer_)
675 {
676 size_t max = eltsize * nmemb;
677 struct rpc_state *rpc = buffer_;
678 size_t avail = rpc->len - rpc->pos;
679 enum packet_read_status status;
680
681 if (!avail) {
682 rpc->initial_buffer = 0;
683 rpc->len = 0;
684 rpc->pos = 0;
685 if (!rpc->flush_read_but_not_sent) {
686 if (!rpc_read_from_out(rpc, 0, &avail, &status))
687 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
688 if (status == PACKET_READ_FLUSH)
689 rpc->flush_read_but_not_sent = 1;
690 }
691 /*
692 * If flush_read_but_not_sent is true, we have already read one
693 * full request but have not fully sent it + EOF, which is why
694 * we need to refrain from reading.
695 */
696 }
697 if (rpc->flush_read_but_not_sent) {
698 if (!avail) {
699 /*
700 * The line length either does not need to be sent at
701 * all or has already been completely sent. Now we can
702 * return 0, indicating EOF, meaning that the flush has
703 * been fully sent.
704 */
705 rpc->flush_read_but_not_sent = 0;
706 return 0;
707 }
708 /*
709 * If avail is non-zero, the line length for the flush still
710 * hasn't been fully sent. Proceed with sending the line
711 * length.
712 */
713 }
714
715 if (max < avail)
716 avail = max;
717 memcpy(ptr, rpc->buf + rpc->pos, avail);
718 rpc->pos += avail;
719 return avail;
720 }
721
722 static int rpc_seek(void *clientp, curl_off_t offset, int origin)
723 {
724 struct rpc_state *rpc = clientp;
725
726 if (origin != SEEK_SET)
727 BUG("rpc_seek only handles SEEK_SET, not %d", origin);
728
729 if (rpc->initial_buffer) {
730 if (offset < 0 || offset > rpc->len) {
731 error("curl seek would be outside of rpc buffer");
732 return CURL_SEEKFUNC_FAIL;
733 }
734 rpc->pos = offset;
735 return CURL_SEEKFUNC_OK;
736 }
737 error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
738 return CURL_SEEKFUNC_FAIL;
739 }
740
741 struct check_pktline_state {
742 char len_buf[4];
743 int len_filled;
744 int remaining;
745 };
746
747 static void check_pktline(struct check_pktline_state *state, const char *ptr, size_t size)
748 {
749 while (size) {
750 if (!state->remaining) {
751 int digits_remaining = 4 - state->len_filled;
752 if (digits_remaining > size)
753 digits_remaining = size;
754 memcpy(&state->len_buf[state->len_filled], ptr, digits_remaining);
755 state->len_filled += digits_remaining;
756 ptr += digits_remaining;
757 size -= digits_remaining;
758
759 if (state->len_filled == 4) {
760 state->remaining = packet_length(state->len_buf,
761 sizeof(state->len_buf));
762 if (state->remaining < 0) {
763 die(_("remote-curl: bad line length character: %.4s"), state->len_buf);
764 } else if (state->remaining == 2) {
765 die(_("remote-curl: unexpected response end packet"));
766 } else if (state->remaining < 4) {
767 state->remaining = 0;
768 } else {
769 state->remaining -= 4;
770 }
771 state->len_filled = 0;
772 }
773 }
774
775 if (state->remaining) {
776 int remaining = state->remaining;
777 if (remaining > size)
778 remaining = size;
779 ptr += remaining;
780 size -= remaining;
781 state->remaining -= remaining;
782 }
783 }
784 }
785
786 struct rpc_in_data {
787 struct rpc_state *rpc;
788 struct active_request_slot *slot;
789 int check_pktline;
790 struct check_pktline_state pktline_state;
791 };
792
793 /*
794 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
795 * from ptr.
796 */
797 static size_t rpc_in(char *ptr, size_t eltsize,
798 size_t nmemb, void *buffer_)
799 {
800 size_t size = eltsize * nmemb;
801 struct rpc_in_data *data = buffer_;
802 long response_code;
803
804 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
805 &response_code) != CURLE_OK)
806 return size;
807 if (response_code >= 300)
808 return size;
809 if (size)
810 data->rpc->any_written = 1;
811 if (data->check_pktline)
812 check_pktline(&data->pktline_state, ptr, size);
813 write_or_die(data->rpc->in, ptr, size);
814 return size;
815 }
816
817 static int run_slot(struct active_request_slot *slot,
818 struct slot_results *results)
819 {
820 int err;
821 struct slot_results results_buf;
822
823 if (!results)
824 results = &results_buf;
825
826 err = run_one_slot(slot, results);
827
828 if (err != HTTP_OK && err != HTTP_REAUTH) {
829 struct strbuf msg = STRBUF_INIT;
830 if (results->http_code && results->http_code != 200)
831 strbuf_addf(&msg, "HTTP %ld", results->http_code);
832 if (results->curl_result != CURLE_OK) {
833 if (msg.len)
834 strbuf_addch(&msg, ' ');
835 strbuf_addf(&msg, "curl %d", results->curl_result);
836 if (curl_errorstr[0]) {
837 strbuf_addch(&msg, ' ');
838 strbuf_addstr(&msg, curl_errorstr);
839 }
840 }
841 error(_("RPC failed; %s"), msg.buf);
842 strbuf_release(&msg);
843 }
844
845 return err;
846 }
847
848 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
849 {
850 struct active_request_slot *slot;
851 struct curl_slist *headers = http_copy_default_headers();
852 struct strbuf buf = STRBUF_INIT;
853 int err;
854
855 slot = get_active_slot();
856
857 headers = curl_slist_append(headers, rpc->hdr_content_type);
858 headers = curl_slist_append(headers, rpc->hdr_accept);
859
860 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
861 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
862 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
863 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
864 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
865 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
866 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
867 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
868 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &buf);
869
870 err = run_slot(slot, results);
871
872 curl_slist_free_all(headers);
873 strbuf_release(&buf);
874 return err;
875 }
876
877 static curl_off_t xcurl_off_t(size_t len)
878 {
879 uintmax_t size = len;
880 if (size > maximum_signed_value_of_type(curl_off_t))
881 die(_("cannot handle pushes this big"));
882 return (curl_off_t)size;
883 }
884
885 /*
886 * If flush_received is true, do not attempt to read any more; just use what's
887 * in rpc->buf.
888 */
889 static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received)
890 {
891 struct active_request_slot *slot;
892 struct curl_slist *headers = http_copy_default_headers();
893 int use_gzip = rpc->gzip_request;
894 char *gzip_body = NULL;
895 size_t gzip_size = 0;
896 int err, large_request = 0;
897 int needs_100_continue = 0;
898 struct rpc_in_data rpc_in_data;
899
900 /* Try to load the entire request, if we can fit it into the
901 * allocated buffer space we can use HTTP/1.0 and avoid the
902 * chunked encoding mess.
903 */
904 if (!flush_received) {
905 while (1) {
906 size_t n;
907 enum packet_read_status status;
908
909 if (!rpc_read_from_out(rpc, 0, &n, &status)) {
910 large_request = 1;
911 use_gzip = 0;
912 break;
913 }
914 if (status == PACKET_READ_FLUSH)
915 break;
916 }
917 }
918
919 if (large_request) {
920 struct slot_results results;
921
922 do {
923 err = probe_rpc(rpc, &results);
924 if (err == HTTP_REAUTH)
925 credential_fill(&http_auth);
926 } while (err == HTTP_REAUTH);
927 if (err != HTTP_OK)
928 return -1;
929
930 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
931 needs_100_continue = 1;
932 }
933
934 headers = curl_slist_append(headers, rpc->hdr_content_type);
935 headers = curl_slist_append(headers, rpc->hdr_accept);
936 headers = curl_slist_append(headers, needs_100_continue ?
937 "Expect: 100-continue" : "Expect:");
938
939 /* Add Accept-Language header */
940 if (rpc->hdr_accept_language)
941 headers = curl_slist_append(headers, rpc->hdr_accept_language);
942
943 /* Add the extra Git-Protocol header */
944 if (rpc->protocol_header)
945 headers = curl_slist_append(headers, rpc->protocol_header);
946
947 retry:
948 slot = get_active_slot();
949
950 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
951 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
952 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
953 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
954
955 if (large_request) {
956 /* The request body is large and the size cannot be predicted.
957 * We must use chunked encoding to send it.
958 */
959 #ifdef GIT_CURL_NEED_TRANSFER_ENCODING_HEADER
960 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
961 #endif
962 rpc->initial_buffer = 1;
963 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
964 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
965 curl_easy_setopt(slot->curl, CURLOPT_SEEKFUNCTION, rpc_seek);
966 curl_easy_setopt(slot->curl, CURLOPT_SEEKDATA, rpc);
967 if (options.verbosity > 1) {
968 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
969 fflush(stderr);
970 }
971
972 } else if (gzip_body) {
973 /*
974 * If we are looping to retry authentication, then the previous
975 * run will have set up the headers and gzip buffer already,
976 * and we just need to send it.
977 */
978 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
979 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
980
981 } else if (use_gzip && 1024 < rpc->len) {
982 /* The client backend isn't giving us compressed data so
983 * we can try to deflate it ourselves, this may save on
984 * the transfer time.
985 */
986 git_zstream stream;
987 int ret;
988
989 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
990 gzip_size = git_deflate_bound(&stream, rpc->len);
991 gzip_body = xmalloc(gzip_size);
992
993 stream.next_in = (unsigned char *)rpc->buf;
994 stream.avail_in = rpc->len;
995 stream.next_out = (unsigned char *)gzip_body;
996 stream.avail_out = gzip_size;
997
998 ret = git_deflate(&stream, Z_FINISH);
999 if (ret != Z_STREAM_END)
1000 die(_("cannot deflate request; zlib deflate error %d"), ret);
1001
1002 ret = git_deflate_end_gently(&stream);
1003 if (ret != Z_OK)
1004 die(_("cannot deflate request; zlib end error %d"), ret);
1005
1006 gzip_size = stream.total_out;
1007
1008 headers = curl_slist_append(headers, "Content-Encoding: gzip");
1009 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
1010 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
1011
1012 if (options.verbosity > 1) {
1013 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
1014 rpc->service_name,
1015 (unsigned long)rpc->len, (unsigned long)gzip_size);
1016 fflush(stderr);
1017 }
1018 } else {
1019 /* We know the complete request size in advance, use the
1020 * more normal Content-Length approach.
1021 */
1022 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
1023 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
1024 if (options.verbosity > 1) {
1025 fprintf(stderr, "POST %s (%lu bytes)\n",
1026 rpc->service_name, (unsigned long)rpc->len);
1027 fflush(stderr);
1028 }
1029 }
1030
1031 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1032 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
1033 rpc_in_data.rpc = rpc;
1034 rpc_in_data.slot = slot;
1035 rpc_in_data.check_pktline = stateless_connect;
1036 memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state));
1037 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &rpc_in_data);
1038 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1039
1040
1041 rpc->any_written = 0;
1042 err = run_slot(slot, NULL);
1043 if (err == HTTP_REAUTH && !large_request) {
1044 credential_fill(&http_auth);
1045 goto retry;
1046 }
1047 if (err != HTTP_OK)
1048 err = -1;
1049
1050 if (!rpc->any_written)
1051 err = -1;
1052
1053 if (rpc_in_data.pktline_state.len_filled)
1054 err = error(_("%d bytes of length header were received"), rpc_in_data.pktline_state.len_filled);
1055 if (rpc_in_data.pktline_state.remaining)
1056 err = error(_("%d bytes of body are still expected"), rpc_in_data.pktline_state.remaining);
1057
1058 if (stateless_connect)
1059 packet_response_end(rpc->in);
1060
1061 curl_slist_free_all(headers);
1062 free(gzip_body);
1063 return err;
1064 }
1065
1066 static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
1067 const char **client_argv, const struct strbuf *preamble,
1068 struct strbuf *rpc_result)
1069 {
1070 const char *svc = rpc->service_name;
1071 struct strbuf buf = STRBUF_INIT;
1072 struct child_process client = CHILD_PROCESS_INIT;
1073 int err = 0;
1074
1075 client.in = -1;
1076 client.out = -1;
1077 client.git_cmd = 1;
1078 strvec_pushv(&client.args, client_argv);
1079 if (start_command(&client))
1080 exit(1);
1081 write_or_die(client.in, preamble->buf, preamble->len);
1082 if (heads)
1083 write_or_die(client.in, heads->buf, heads->len);
1084
1085 rpc->alloc = http_post_buffer;
1086 rpc->buf = xmalloc(rpc->alloc);
1087 rpc->in = client.in;
1088 rpc->out = client.out;
1089
1090 strbuf_addf(&buf, "%s%s", url.buf, svc);
1091 rpc->service_url = strbuf_detach(&buf, NULL);
1092
1093 rpc->hdr_accept_language = xstrdup_or_null(http_get_accept_language_header());
1094
1095 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
1096 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
1097
1098 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
1099 rpc->hdr_accept = strbuf_detach(&buf, NULL);
1100
1101 if (get_protocol_http_header(heads->version, &buf))
1102 rpc->protocol_header = strbuf_detach(&buf, NULL);
1103 else
1104 rpc->protocol_header = NULL;
1105
1106 while (!err) {
1107 int n = packet_read(rpc->out, rpc->buf, rpc->alloc, 0);
1108 if (!n)
1109 break;
1110 rpc->pos = 0;
1111 rpc->len = n;
1112 err |= post_rpc(rpc, 0, 0);
1113 }
1114
1115 close(client.in);
1116 client.in = -1;
1117 if (!err) {
1118 strbuf_read(rpc_result, client.out, 0);
1119 } else {
1120 char buf[4096];
1121 for (;;)
1122 if (xread(client.out, buf, sizeof(buf)) <= 0)
1123 break;
1124 }
1125
1126 close(client.out);
1127 client.out = -1;
1128
1129 err |= finish_command(&client);
1130 free(rpc->service_url);
1131 free(rpc->hdr_content_type);
1132 free(rpc->hdr_accept);
1133 free(rpc->hdr_accept_language);
1134 free(rpc->protocol_header);
1135 free(rpc->buf);
1136 strbuf_release(&buf);
1137 return err;
1138 }
1139
1140 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
1141 {
1142 struct walker *walker;
1143 char **targets;
1144 int ret, i;
1145
1146 ALLOC_ARRAY(targets, nr_heads);
1147 if (options.depth || options.deepen_since)
1148 die(_("dumb http transport does not support shallow capabilities"));
1149 for (i = 0; i < nr_heads; i++)
1150 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
1151
1152 walker = get_http_walker(url.buf);
1153 walker->get_verbosely = options.verbosity >= 3;
1154 walker->get_progress = options.progress;
1155 walker->get_recover = 0;
1156 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
1157 walker_free(walker);
1158
1159 for (i = 0; i < nr_heads; i++)
1160 free(targets[i]);
1161 free(targets);
1162
1163 return ret ? error(_("fetch failed.")) : 0;
1164 }
1165
1166 static int fetch_git(struct discovery *heads,
1167 int nr_heads, struct ref **to_fetch)
1168 {
1169 struct rpc_state rpc = RPC_STATE_INIT;
1170 struct strbuf preamble = STRBUF_INIT;
1171 int i, err;
1172 struct strvec args = STRVEC_INIT;
1173 struct strbuf rpc_result = STRBUF_INIT;
1174
1175 strvec_pushl(&args, "fetch-pack", "--stateless-rpc",
1176 "--stdin", "--lock-pack", NULL);
1177 if (options.followtags)
1178 strvec_push(&args, "--include-tag");
1179 if (options.thin)
1180 strvec_push(&args, "--thin");
1181 if (options.verbosity >= 3)
1182 strvec_pushl(&args, "-v", "-v", NULL);
1183 if (options.check_self_contained_and_connected)
1184 strvec_push(&args, "--check-self-contained-and-connected");
1185 if (options.cloning)
1186 strvec_push(&args, "--cloning");
1187 if (options.update_shallow)
1188 strvec_push(&args, "--update-shallow");
1189 if (!options.progress)
1190 strvec_push(&args, "--no-progress");
1191 if (options.depth)
1192 strvec_pushf(&args, "--depth=%lu", options.depth);
1193 if (options.deepen_since)
1194 strvec_pushf(&args, "--shallow-since=%s", options.deepen_since);
1195 for (i = 0; i < options.deepen_not.nr; i++)
1196 strvec_pushf(&args, "--shallow-exclude=%s",
1197 options.deepen_not.items[i].string);
1198 if (options.deepen_relative && options.depth)
1199 strvec_push(&args, "--deepen-relative");
1200 if (options.from_promisor)
1201 strvec_push(&args, "--from-promisor");
1202 if (options.refetch)
1203 strvec_push(&args, "--refetch");
1204 if (options.filter)
1205 strvec_pushf(&args, "--filter=%s", options.filter);
1206 strvec_push(&args, url.buf);
1207
1208 for (i = 0; i < nr_heads; i++) {
1209 struct ref *ref = to_fetch[i];
1210 if (!*ref->name)
1211 die(_("cannot fetch by sha1 over smart http"));
1212 packet_buf_write(&preamble, "%s %s\n",
1213 oid_to_hex(&ref->old_oid), ref->name);
1214 }
1215 packet_buf_flush(&preamble);
1216
1217 memset(&rpc, 0, sizeof(rpc));
1218 rpc.service_name = "git-upload-pack",
1219 rpc.gzip_request = 1;
1220
1221 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1222 if (rpc_result.len)
1223 write_or_die(1, rpc_result.buf, rpc_result.len);
1224 strbuf_release(&rpc_result);
1225 strbuf_release(&preamble);
1226 strvec_clear(&args);
1227 return err;
1228 }
1229
1230 static int fetch(int nr_heads, struct ref **to_fetch)
1231 {
1232 struct discovery *d = discover_refs("git-upload-pack", 0);
1233 if (d->proto_git)
1234 return fetch_git(d, nr_heads, to_fetch);
1235 else
1236 return fetch_dumb(nr_heads, to_fetch);
1237 }
1238
1239 static void parse_fetch(struct strbuf *buf)
1240 {
1241 struct ref **to_fetch = NULL;
1242 struct ref *list_head = NULL;
1243 struct ref **list = &list_head;
1244 int alloc_heads = 0, nr_heads = 0;
1245
1246 do {
1247 const char *p;
1248 if (skip_prefix(buf->buf, "fetch ", &p)) {
1249 const char *name;
1250 struct ref *ref;
1251 struct object_id old_oid;
1252 const char *q;
1253
1254 if (parse_oid_hex(p, &old_oid, &q))
1255 die(_("protocol error: expected sha/ref, got '%s'"), p);
1256 if (*q == ' ')
1257 name = q + 1;
1258 else if (!*q)
1259 name = "";
1260 else
1261 die(_("protocol error: expected sha/ref, got '%s'"), p);
1262
1263 ref = alloc_ref(name);
1264 oidcpy(&ref->old_oid, &old_oid);
1265
1266 *list = ref;
1267 list = &ref->next;
1268
1269 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1270 to_fetch[nr_heads++] = ref;
1271 }
1272 else
1273 die(_("http transport does not support %s"), buf->buf);
1274
1275 strbuf_reset(buf);
1276 if (strbuf_getline_lf(buf, stdin) == EOF)
1277 return;
1278 if (!*buf->buf)
1279 break;
1280 } while (1);
1281
1282 if (fetch(nr_heads, to_fetch))
1283 exit(128); /* error already reported */
1284 free_refs(list_head);
1285 free(to_fetch);
1286
1287 printf("\n");
1288 fflush(stdout);
1289 strbuf_reset(buf);
1290 }
1291
1292 static void parse_get(const char *arg)
1293 {
1294 struct strbuf url = STRBUF_INIT;
1295 struct strbuf path = STRBUF_INIT;
1296 const char *space;
1297
1298 space = strchr(arg, ' ');
1299
1300 if (!space)
1301 die(_("protocol error: expected '<url> <path>', missing space"));
1302
1303 strbuf_add(&url, arg, space - arg);
1304 strbuf_addstr(&path, space + 1);
1305
1306 if (http_get_file(url.buf, path.buf, NULL))
1307 die(_("failed to download file at URL '%s'"), url.buf);
1308
1309 strbuf_release(&url);
1310 strbuf_release(&path);
1311 printf("\n");
1312 fflush(stdout);
1313 }
1314
1315 static int push_dav(int nr_spec, const char **specs)
1316 {
1317 struct child_process child = CHILD_PROCESS_INIT;
1318 size_t i;
1319
1320 child.git_cmd = 1;
1321 strvec_push(&child.args, "http-push");
1322 strvec_push(&child.args, "--helper-status");
1323 if (options.dry_run)
1324 strvec_push(&child.args, "--dry-run");
1325 if (options.verbosity > 1)
1326 strvec_push(&child.args, "--verbose");
1327 strvec_push(&child.args, url.buf);
1328 for (i = 0; i < nr_spec; i++)
1329 strvec_push(&child.args, specs[i]);
1330
1331 if (run_command(&child))
1332 die(_("git-http-push failed"));
1333 return 0;
1334 }
1335
1336 static int push_git(struct discovery *heads, int nr_spec, const char **specs)
1337 {
1338 struct rpc_state rpc = RPC_STATE_INIT;
1339 int i, err;
1340 struct strvec args;
1341 struct string_list_item *cas_option;
1342 struct strbuf preamble = STRBUF_INIT;
1343 struct strbuf rpc_result = STRBUF_INIT;
1344
1345 strvec_init(&args);
1346 strvec_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1347 NULL);
1348
1349 if (options.thin)
1350 strvec_push(&args, "--thin");
1351 if (options.dry_run)
1352 strvec_push(&args, "--dry-run");
1353 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1354 strvec_push(&args, "--signed=yes");
1355 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1356 strvec_push(&args, "--signed=if-asked");
1357 if (options.atomic)
1358 strvec_push(&args, "--atomic");
1359 if (options.verbosity == 0)
1360 strvec_push(&args, "--quiet");
1361 else if (options.verbosity > 1)
1362 strvec_push(&args, "--verbose");
1363 for (i = 0; i < options.push_options.nr; i++)
1364 strvec_pushf(&args, "--push-option=%s",
1365 options.push_options.items[i].string);
1366 strvec_push(&args, options.progress ? "--progress" : "--no-progress");
1367 for_each_string_list_item(cas_option, &cas_options)
1368 strvec_push(&args, cas_option->string);
1369 strvec_push(&args, url.buf);
1370
1371 if (options.force_if_includes)
1372 strvec_push(&args, "--force-if-includes");
1373
1374 strvec_push(&args, "--stdin");
1375 for (i = 0; i < nr_spec; i++)
1376 packet_buf_write(&preamble, "%s\n", specs[i]);
1377 packet_buf_flush(&preamble);
1378
1379 memset(&rpc, 0, sizeof(rpc));
1380 rpc.service_name = "git-receive-pack",
1381
1382 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1383 if (rpc_result.len)
1384 write_or_die(1, rpc_result.buf, rpc_result.len);
1385 strbuf_release(&rpc_result);
1386 strbuf_release(&preamble);
1387 strvec_clear(&args);
1388 return err;
1389 }
1390
1391 static int push(int nr_spec, const char **specs)
1392 {
1393 struct discovery *heads = discover_refs("git-receive-pack", 1);
1394 int ret;
1395
1396 if (heads->proto_git)
1397 ret = push_git(heads, nr_spec, specs);
1398 else
1399 ret = push_dav(nr_spec, specs);
1400 free_discovery(heads);
1401 return ret;
1402 }
1403
1404 static void parse_push(struct strbuf *buf)
1405 {
1406 struct strvec specs = STRVEC_INIT;
1407 int ret;
1408
1409 do {
1410 const char *arg;
1411 if (skip_prefix(buf->buf, "push ", &arg))
1412 strvec_push(&specs, arg);
1413 else
1414 die(_("http transport does not support %s"), buf->buf);
1415
1416 strbuf_reset(buf);
1417 if (strbuf_getline_lf(buf, stdin) == EOF)
1418 goto free_specs;
1419 if (!*buf->buf)
1420 break;
1421 } while (1);
1422
1423 ret = push(specs.nr, specs.v);
1424 printf("\n");
1425 fflush(stdout);
1426
1427 if (ret)
1428 exit(128); /* error already reported */
1429
1430 free_specs:
1431 strvec_clear(&specs);
1432 }
1433
1434 static int stateless_connect(const char *service_name)
1435 {
1436 struct discovery *discover;
1437 struct rpc_state rpc = RPC_STATE_INIT;
1438 struct strbuf buf = STRBUF_INIT;
1439 const char *accept_language;
1440
1441 /*
1442 * Run the info/refs request and see if the server supports protocol
1443 * v2. If and only if the server supports v2 can we successfully
1444 * establish a stateless connection, otherwise we need to tell the
1445 * client to fallback to using other transport helper functions to
1446 * complete their request.
1447 *
1448 * The "git-upload-archive" service is a read-only operation. Fallback
1449 * to use "git-upload-pack" service to discover protocol version.
1450 */
1451 if (!strcmp(service_name, "git-upload-archive"))
1452 discover = discover_refs("git-upload-pack", 0);
1453 else
1454 discover = discover_refs(service_name, 0);
1455 if (discover->version != protocol_v2) {
1456 printf("fallback\n");
1457 fflush(stdout);
1458 return -1;
1459 } else {
1460 /* Stateless Connection established */
1461 printf("\n");
1462 fflush(stdout);
1463 }
1464 accept_language = http_get_accept_language_header();
1465 if (accept_language)
1466 rpc.hdr_accept_language = xstrfmt("%s", accept_language);
1467
1468 rpc.service_name = service_name;
1469 rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name);
1470 rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name);
1471 rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name);
1472 if (get_protocol_http_header(discover->version, &buf)) {
1473 rpc.protocol_header = strbuf_detach(&buf, NULL);
1474 } else {
1475 rpc.protocol_header = NULL;
1476 strbuf_release(&buf);
1477 }
1478 rpc.buf = xmalloc(http_post_buffer);
1479 rpc.alloc = http_post_buffer;
1480 rpc.len = 0;
1481 rpc.pos = 0;
1482 rpc.in = 1;
1483 rpc.out = 0;
1484 rpc.any_written = 0;
1485 rpc.gzip_request = 1;
1486 rpc.initial_buffer = 0;
1487 rpc.write_line_lengths = 1;
1488 rpc.flush_read_but_not_sent = 0;
1489
1490 /*
1491 * Dump the capability listing that we got from the server earlier
1492 * during the info/refs request. This does not work with the
1493 * "git-upload-archive" service.
1494 */
1495 if (strcmp(service_name, "git-upload-archive"))
1496 write_or_die(rpc.in, discover->buf, discover->len);
1497
1498 /* Until we see EOF keep sending POSTs */
1499 while (1) {
1500 size_t avail;
1501 enum packet_read_status status;
1502
1503 if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail,
1504 &status))
1505 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
1506 if (status == PACKET_READ_EOF)
1507 break;
1508 if (post_rpc(&rpc, 1, status == PACKET_READ_FLUSH))
1509 /* We would have an err here */
1510 break;
1511 /* Reset the buffer for next request */
1512 rpc.len = 0;
1513 }
1514
1515 free(rpc.service_url);
1516 free(rpc.hdr_content_type);
1517 free(rpc.hdr_accept);
1518 free(rpc.hdr_accept_language);
1519 free(rpc.protocol_header);
1520 free(rpc.buf);
1521 strbuf_release(&buf);
1522
1523 return 0;
1524 }
1525
1526 int cmd_main(int argc, const char **argv)
1527 {
1528 struct strbuf buf = STRBUF_INIT;
1529 int nongit;
1530 int ret = 1;
1531
1532 setup_git_directory_gently(&nongit);
1533 if (argc < 2) {
1534 error(_("remote-curl: usage: git remote-curl <remote> [<url>]"));
1535 goto cleanup;
1536 }
1537
1538 options.verbosity = 1;
1539 options.progress = !!isatty(2);
1540 options.thin = 1;
1541 string_list_init_dup(&options.deepen_not);
1542 string_list_init_dup(&options.push_options);
1543
1544 /*
1545 * Just report "remote-curl" here (folding all the various aliases
1546 * ("git-remote-http", "git-remote-https", and etc.) here since they
1547 * are all just copies of the same actual executable.
1548 */
1549 trace2_cmd_name("remote-curl");
1550
1551 remote = remote_get(argv[1]);
1552
1553 if (argc > 2) {
1554 end_url_with_slash(&url, argv[2]);
1555 } else {
1556 end_url_with_slash(&url, remote->url[0]);
1557 }
1558
1559 http_init(remote, url.buf, 0);
1560
1561 do {
1562 const char *arg;
1563
1564 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1565 if (ferror(stdin))
1566 error(_("remote-curl: error reading command stream from git"));
1567 goto cleanup;
1568 }
1569 if (buf.len == 0)
1570 break;
1571 if (starts_with(buf.buf, "fetch ")) {
1572 if (nongit) {
1573 setup_git_directory_gently(&nongit);
1574 if (nongit)
1575 die(_("remote-curl: fetch attempted without a local repo"));
1576 }
1577 parse_fetch(&buf);
1578
1579 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1580 int for_push = !!strstr(buf.buf + 4, "for-push");
1581 output_refs(get_refs(for_push));
1582
1583 } else if (starts_with(buf.buf, "push ")) {
1584 parse_push(&buf);
1585
1586 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1587 char *value = strchr(arg, ' ');
1588 int result;
1589
1590 if (value)
1591 *value++ = '\0';
1592 else
1593 value = "true";
1594
1595 result = set_option(arg, value);
1596 if (!result)
1597 printf("ok\n");
1598 else if (result < 0)
1599 printf("error invalid value\n");
1600 else
1601 printf("unsupported\n");
1602 fflush(stdout);
1603
1604 } else if (skip_prefix(buf.buf, "get ", &arg)) {
1605 parse_get(arg);
1606 fflush(stdout);
1607
1608 } else if (!strcmp(buf.buf, "capabilities")) {
1609 printf("stateless-connect\n");
1610 printf("fetch\n");
1611 printf("get\n");
1612 printf("option\n");
1613 printf("push\n");
1614 printf("check-connectivity\n");
1615 printf("object-format\n");
1616 printf("\n");
1617 fflush(stdout);
1618 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1619 if (!stateless_connect(arg))
1620 break;
1621 } else {
1622 error(_("remote-curl: unknown command '%s' from git"), buf.buf);
1623 goto cleanup;
1624 }
1625 strbuf_reset(&buf);
1626 } while (1);
1627
1628 http_cleanup();
1629 ret = 0;
1630 cleanup:
1631 strbuf_release(&buf);
1632
1633 return ret;
1634 }
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