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refs.h: HEAD is not that special
[alt-git.git] / remote-curl.c
blobef05752ca5738ea16d16d38c8ea9c65e2a9ea167
1 #include "git-compat-util.h"
2 #include "config.h"
3 #include "environment.h"
4 #include "gettext.h"
5 #include "hex.h"
6 #include "remote.h"
7 #include "connect.h"
8 #include "strbuf.h"
9 #include "walker.h"
10 #include "http.h"
11 #include "exec-cmd.h"
12 #include "run-command.h"
13 #include "pkt-line.h"
14 #include "string-list.h"
15 #include "sideband.h"
16 #include "strvec.h"
17 #include "credential.h"
18 #include "oid-array.h"
19 #include "send-pack.h"
20 #include "setup.h"
21 #include "protocol.h"
22 #include "quote.h"
23 #include "trace2.h"
24 #include "transport.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 int algo;
216 options.object_format = 1;
217 if (strcmp(value, "true")) {
218 algo = hash_algo_by_name(value);
219 if (algo == GIT_HASH_UNKNOWN)
220 die("unknown object format '%s'", value);
221 options.hash_algo = &hash_algos[algo];
222 }
223 return 0;
224 } else {
225 return 1 /* unsupported */;
226 }
227 }
228
229 struct discovery {
230 char *service;
231 char *buf_alloc;
232 char *buf;
233 size_t len;
234 struct ref *refs;
235 struct oid_array shallow;
236 enum protocol_version version;
237 unsigned proto_git : 1;
238 };
239 static struct discovery *last_discovery;
240
241 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
242 {
243 struct ref *list = NULL;
244 struct packet_reader reader;
245
246 packet_reader_init(&reader, -1, heads->buf, heads->len,
247 PACKET_READ_CHOMP_NEWLINE |
248 PACKET_READ_GENTLE_ON_EOF |
249 PACKET_READ_DIE_ON_ERR_PACKET);
250
251 heads->version = discover_version(&reader);
252 switch (heads->version) {
253 case protocol_v2:
254 /*
255 * Do nothing. This isn't a list of refs but rather a
256 * capability advertisement. Client would have run
257 * 'stateless-connect' so we'll dump this capability listing
258 * and let them request the refs themselves.
259 */
260 break;
261 case protocol_v1:
262 case protocol_v0:
263 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
264 NULL, &heads->shallow);
265 options.hash_algo = reader.hash_algo;
266 break;
267 case protocol_unknown_version:
268 BUG("unknown protocol version");
269 }
270
271 return list;
272 }
273
274 static const struct git_hash_algo *detect_hash_algo(struct discovery *heads)
275 {
276 const char *p = memchr(heads->buf, '\t', heads->len);
277 int algo;
278 if (!p)
279 return the_hash_algo;
280
281 algo = hash_algo_by_length((p - heads->buf) / 2);
282 if (algo == GIT_HASH_UNKNOWN)
283 return NULL;
284 return &hash_algos[algo];
285 }
286
287 static struct ref *parse_info_refs(struct discovery *heads)
288 {
289 char *data, *start, *mid;
290 char *ref_name;
291 int i = 0;
292
293 struct ref *refs = NULL;
294 struct ref *ref = NULL;
295 struct ref *last_ref = NULL;
296
297 options.hash_algo = detect_hash_algo(heads);
298 if (!options.hash_algo)
299 die("%sinfo/refs not valid: could not determine hash algorithm; "
300 "is this a git repository?",
301 transport_anonymize_url(url.buf));
302
303 data = heads->buf;
304 start = NULL;
305 mid = data;
306 while (i < heads->len) {
307 if (!start) {
308 start = &data[i];
309 }
310 if (data[i] == '\t')
311 mid = &data[i];
312 if (data[i] == '\n') {
313 if (mid - start != options.hash_algo->hexsz)
314 die(_("%sinfo/refs not valid: is this a git repository?"),
315 transport_anonymize_url(url.buf));
316 data[i] = 0;
317 ref_name = mid + 1;
318 ref = alloc_ref(ref_name);
319 get_oid_hex_algop(start, &ref->old_oid, options.hash_algo);
320 if (!refs)
321 refs = ref;
322 if (last_ref)
323 last_ref->next = ref;
324 last_ref = ref;
325 start = NULL;
326 }
327 i++;
328 }
329
330 ref = alloc_ref("HEAD");
331 if (!http_fetch_ref(url.buf, ref) &&
332 !resolve_remote_symref(ref, refs)) {
333 ref->next = refs;
334 refs = ref;
335 } else {
336 free(ref);
337 }
338
339 return refs;
340 }
341
342 static void free_discovery(struct discovery *d)
343 {
344 if (d) {
345 if (d == last_discovery)
346 last_discovery = NULL;
347 free(d->shallow.oid);
348 free(d->buf_alloc);
349 free_refs(d->refs);
350 free(d->service);
351 free(d);
352 }
353 }
354
355 static int show_http_message(struct strbuf *type, struct strbuf *charset,
356 struct strbuf *msg)
357 {
358 const char *p, *eol;
359
360 /*
361 * We only show text/plain parts, as other types are likely
362 * to be ugly to look at on the user's terminal.
363 */
364 if (strcmp(type->buf, "text/plain"))
365 return -1;
366 if (charset->len)
367 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
368
369 strbuf_trim(msg);
370 if (!msg->len)
371 return -1;
372
373 p = msg->buf;
374 do {
375 eol = strchrnul(p, '\n');
376 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
377 p = eol + 1;
378 } while(*eol);
379 return 0;
380 }
381
382 static int get_protocol_http_header(enum protocol_version version,
383 struct strbuf *header)
384 {
385 if (version > 0) {
386 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
387 version);
388
389 return 1;
390 }
391
392 return 0;
393 }
394
395 static void check_smart_http(struct discovery *d, const char *service,
396 struct strbuf *type)
397 {
398 const char *p;
399 struct packet_reader reader;
400
401 /*
402 * If we don't see x-$service-advertisement, then it's not smart-http.
403 * But once we do, we commit to it and assume any other protocol
404 * violations are hard errors.
405 */
406 if (!skip_prefix(type->buf, "application/x-", &p) ||
407 !skip_prefix(p, service, &p) ||
408 strcmp(p, "-advertisement"))
409 return;
410
411 packet_reader_init(&reader, -1, d->buf, d->len,
412 PACKET_READ_CHOMP_NEWLINE |
413 PACKET_READ_DIE_ON_ERR_PACKET);
414 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
415 die(_("invalid server response; expected service, got flush packet"));
416
417 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
418 /*
419 * The header can include additional metadata lines, up
420 * until a packet flush marker. Ignore these now, but
421 * in the future we might start to scan them.
422 */
423 for (;;) {
424 packet_reader_read(&reader);
425 if (reader.pktlen <= 0) {
426 break;
427 }
428 }
429
430 /*
431 * v0 smart http; callers expect us to soak up the
432 * service and header packets
433 */
434 d->buf = reader.src_buffer;
435 d->len = reader.src_len;
436 d->proto_git = 1;
437
438 } else if (!strcmp(reader.line, "version 2")) {
439 /*
440 * v2 smart http; do not consume version packet, which will
441 * be handled elsewhere.
442 */
443 d->proto_git = 1;
444
445 } else {
446 die(_("invalid server response; got '%s'"), reader.line);
447 }
448 }
449
450 static struct discovery *discover_refs(const char *service, int for_push)
451 {
452 struct strbuf type = STRBUF_INIT;
453 struct strbuf charset = STRBUF_INIT;
454 struct strbuf buffer = STRBUF_INIT;
455 struct strbuf refs_url = STRBUF_INIT;
456 struct strbuf effective_url = STRBUF_INIT;
457 struct strbuf protocol_header = STRBUF_INIT;
458 struct string_list extra_headers = STRING_LIST_INIT_DUP;
459 struct discovery *last = last_discovery;
460 int http_ret, maybe_smart = 0;
461 struct http_get_options http_options;
462 enum protocol_version version = get_protocol_version_config();
463
464 if (last && !strcmp(service, last->service))
465 return last;
466 free_discovery(last);
467
468 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
469 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
470 git_env_bool("GIT_SMART_HTTP", 1)) {
471 maybe_smart = 1;
472 if (!strchr(url.buf, '?'))
473 strbuf_addch(&refs_url, '?');
474 else
475 strbuf_addch(&refs_url, '&');
476 strbuf_addf(&refs_url, "service=%s", service);
477 }
478
479 /*
480 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
481 * to perform any operation that doesn't involve upload-pack (i.e., a
482 * fetch, ls-remote, etc), then fallback to v0 since we don't know how
483 * to do anything else (like push or remote archive) via v2.
484 */
485 if (version == protocol_v2 && strcmp("git-upload-pack", service))
486 version = protocol_v0;
487
488 /* Add the extra Git-Protocol header */
489 if (get_protocol_http_header(version, &protocol_header))
490 string_list_append(&extra_headers, protocol_header.buf);
491
492 memset(&http_options, 0, sizeof(http_options));
493 http_options.content_type = &type;
494 http_options.charset = &charset;
495 http_options.effective_url = &effective_url;
496 http_options.base_url = &url;
497 http_options.extra_headers = &extra_headers;
498 http_options.initial_request = 1;
499 http_options.no_cache = 1;
500
501 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
502 switch (http_ret) {
503 case HTTP_OK:
504 break;
505 case HTTP_MISSING_TARGET:
506 show_http_message(&type, &charset, &buffer);
507 die(_("repository '%s' not found"),
508 transport_anonymize_url(url.buf));
509 case HTTP_NOAUTH:
510 show_http_message(&type, &charset, &buffer);
511 die(_("Authentication failed for '%s'"),
512 transport_anonymize_url(url.buf));
513 case HTTP_NOMATCHPUBLICKEY:
514 show_http_message(&type, &charset, &buffer);
515 die(_("unable to access '%s' with http.pinnedPubkey configuration: %s"),
516 transport_anonymize_url(url.buf), curl_errorstr);
517 default:
518 show_http_message(&type, &charset, &buffer);
519 die(_("unable to access '%s': %s"),
520 transport_anonymize_url(url.buf), curl_errorstr);
521 }
522
523 if (options.verbosity && !starts_with(refs_url.buf, url.buf)) {
524 char *u = transport_anonymize_url(url.buf);
525 warning(_("redirecting to %s"), u);
526 free(u);
527 }
528
529 last= xcalloc(1, sizeof(*last_discovery));
530 last->service = xstrdup(service);
531 last->buf_alloc = strbuf_detach(&buffer, &last->len);
532 last->buf = last->buf_alloc;
533
534 if (maybe_smart)
535 check_smart_http(last, service, &type);
536
537 if (last->proto_git)
538 last->refs = parse_git_refs(last, for_push);
539 else
540 last->refs = parse_info_refs(last);
541
542 strbuf_release(&refs_url);
543 strbuf_release(&type);
544 strbuf_release(&charset);
545 strbuf_release(&effective_url);
546 strbuf_release(&buffer);
547 strbuf_release(&protocol_header);
548 string_list_clear(&extra_headers, 0);
549 last_discovery = last;
550 return last;
551 }
552
553 static struct ref *get_refs(int for_push)
554 {
555 struct discovery *heads;
556
557 if (for_push)
558 heads = discover_refs("git-receive-pack", for_push);
559 else
560 heads = discover_refs("git-upload-pack", for_push);
561
562 return heads->refs;
563 }
564
565 static void output_refs(struct ref *refs)
566 {
567 struct ref *posn;
568 if (options.object_format && options.hash_algo) {
569 printf(":object-format %s\n", options.hash_algo->name);
570 repo_set_hash_algo(the_repository,
571 hash_algo_by_ptr(options.hash_algo));
572 }
573 for (posn = refs; posn; posn = posn->next) {
574 if (posn->symref)
575 printf("@%s %s\n", posn->symref, posn->name);
576 else
577 printf("%s %s\n", hash_to_hex_algop(posn->old_oid.hash,
578 options.hash_algo),
579 posn->name);
580 }
581 printf("\n");
582 fflush(stdout);
583 }
584
585 struct rpc_state {
586 const char *service_name;
587 char *service_url;
588 char *hdr_content_type;
589 char *hdr_accept;
590 char *hdr_accept_language;
591 char *protocol_header;
592 char *buf;
593 size_t alloc;
594 size_t len;
595 size_t pos;
596 int in;
597 int out;
598 int any_written;
599 unsigned gzip_request : 1;
600 unsigned initial_buffer : 1;
601
602 /*
603 * Whenever a pkt-line is read into buf, append the 4 characters
604 * denoting its length before appending the payload.
605 */
606 unsigned write_line_lengths : 1;
607
608 /*
609 * Used by rpc_out; initialize to 0. This is true if a flush has been
610 * read, but the corresponding line length (if write_line_lengths is
611 * true) and EOF have not been sent to libcurl. Since each flush marks
612 * the end of a request, each flush must be completely sent before any
613 * further reading occurs.
614 */
615 unsigned flush_read_but_not_sent : 1;
616 };
617
618 #define RPC_STATE_INIT { 0 }
619
620 /*
621 * Appends the result of reading from rpc->out to the string represented by
622 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
623 * enough space, 0 otherwise.
624 *
625 * If rpc->write_line_lengths is true, appends the line length as a 4-byte
626 * hexadecimal string before appending the result described above.
627 *
628 * Writes the total number of bytes appended into appended.
629 */
630 static int rpc_read_from_out(struct rpc_state *rpc, int options,
631 size_t *appended,
632 enum packet_read_status *status) {
633 size_t left;
634 char *buf;
635 int pktlen_raw;
636
637 if (rpc->write_line_lengths) {
638 left = rpc->alloc - rpc->len - 4;
639 buf = rpc->buf + rpc->len + 4;
640 } else {
641 left = rpc->alloc - rpc->len;
642 buf = rpc->buf + rpc->len;
643 }
644
645 if (left < LARGE_PACKET_MAX)
646 return 0;
647
648 *status = packet_read_with_status(rpc->out, NULL, NULL, buf,
649 left, &pktlen_raw, options);
650 if (*status != PACKET_READ_EOF) {
651 *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0);
652 rpc->len += *appended;
653 }
654
655 if (rpc->write_line_lengths) {
656 switch (*status) {
657 case PACKET_READ_EOF:
658 if (!(options & PACKET_READ_GENTLE_ON_EOF))
659 die(_("shouldn't have EOF when not gentle on EOF"));
660 break;
661 case PACKET_READ_NORMAL:
662 set_packet_header(buf - 4, *appended);
663 break;
664 case PACKET_READ_DELIM:
665 memcpy(buf - 4, "0001", 4);
666 break;
667 case PACKET_READ_FLUSH:
668 memcpy(buf - 4, "0000", 4);
669 break;
670 case PACKET_READ_RESPONSE_END:
671 die(_("remote server sent unexpected response end packet"));
672 }
673 }
674
675 return 1;
676 }
677
678 static size_t rpc_out(void *ptr, size_t eltsize,
679 size_t nmemb, void *buffer_)
680 {
681 size_t max = eltsize * nmemb;
682 struct rpc_state *rpc = buffer_;
683 size_t avail = rpc->len - rpc->pos;
684 enum packet_read_status status;
685
686 if (!avail) {
687 rpc->initial_buffer = 0;
688 rpc->len = 0;
689 rpc->pos = 0;
690 if (!rpc->flush_read_but_not_sent) {
691 if (!rpc_read_from_out(rpc, 0, &avail, &status))
692 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
693 if (status == PACKET_READ_FLUSH)
694 rpc->flush_read_but_not_sent = 1;
695 }
696 /*
697 * If flush_read_but_not_sent is true, we have already read one
698 * full request but have not fully sent it + EOF, which is why
699 * we need to refrain from reading.
700 */
701 }
702 if (rpc->flush_read_but_not_sent) {
703 if (!avail) {
704 /*
705 * The line length either does not need to be sent at
706 * all or has already been completely sent. Now we can
707 * return 0, indicating EOF, meaning that the flush has
708 * been fully sent.
709 */
710 rpc->flush_read_but_not_sent = 0;
711 return 0;
712 }
713 /*
714 * If avail is non-zero, the line length for the flush still
715 * hasn't been fully sent. Proceed with sending the line
716 * length.
717 */
718 }
719
720 if (max < avail)
721 avail = max;
722 memcpy(ptr, rpc->buf + rpc->pos, avail);
723 rpc->pos += avail;
724 return avail;
725 }
726
727 static int rpc_seek(void *clientp, curl_off_t offset, int origin)
728 {
729 struct rpc_state *rpc = clientp;
730
731 if (origin != SEEK_SET)
732 BUG("rpc_seek only handles SEEK_SET, not %d", origin);
733
734 if (rpc->initial_buffer) {
735 if (offset < 0 || offset > rpc->len) {
736 error("curl seek would be outside of rpc buffer");
737 return CURL_SEEKFUNC_FAIL;
738 }
739 rpc->pos = offset;
740 return CURL_SEEKFUNC_OK;
741 }
742 error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
743 return CURL_SEEKFUNC_FAIL;
744 }
745
746 struct check_pktline_state {
747 char len_buf[4];
748 int len_filled;
749 int remaining;
750 };
751
752 static void check_pktline(struct check_pktline_state *state, const char *ptr, size_t size)
753 {
754 while (size) {
755 if (!state->remaining) {
756 int digits_remaining = 4 - state->len_filled;
757 if (digits_remaining > size)
758 digits_remaining = size;
759 memcpy(&state->len_buf[state->len_filled], ptr, digits_remaining);
760 state->len_filled += digits_remaining;
761 ptr += digits_remaining;
762 size -= digits_remaining;
763
764 if (state->len_filled == 4) {
765 state->remaining = packet_length(state->len_buf,
766 sizeof(state->len_buf));
767 if (state->remaining < 0) {
768 die(_("remote-curl: bad line length character: %.4s"), state->len_buf);
769 } else if (state->remaining == 2) {
770 die(_("remote-curl: unexpected response end packet"));
771 } else if (state->remaining < 4) {
772 state->remaining = 0;
773 } else {
774 state->remaining -= 4;
775 }
776 state->len_filled = 0;
777 }
778 }
779
780 if (state->remaining) {
781 int remaining = state->remaining;
782 if (remaining > size)
783 remaining = size;
784 ptr += remaining;
785 size -= remaining;
786 state->remaining -= remaining;
787 }
788 }
789 }
790
791 struct rpc_in_data {
792 struct rpc_state *rpc;
793 struct active_request_slot *slot;
794 int check_pktline;
795 struct check_pktline_state pktline_state;
796 };
797
798 /*
799 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
800 * from ptr.
801 */
802 static size_t rpc_in(char *ptr, size_t eltsize,
803 size_t nmemb, void *buffer_)
804 {
805 size_t size = eltsize * nmemb;
806 struct rpc_in_data *data = buffer_;
807 long response_code;
808
809 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
810 &response_code) != CURLE_OK)
811 return size;
812 if (response_code >= 300)
813 return size;
814 if (size)
815 data->rpc->any_written = 1;
816 if (data->check_pktline)
817 check_pktline(&data->pktline_state, ptr, size);
818 write_or_die(data->rpc->in, ptr, size);
819 return size;
820 }
821
822 static int run_slot(struct active_request_slot *slot,
823 struct slot_results *results)
824 {
825 int err;
826 struct slot_results results_buf;
827
828 if (!results)
829 results = &results_buf;
830
831 err = run_one_slot(slot, results);
832
833 if (err != HTTP_OK && err != HTTP_REAUTH) {
834 struct strbuf msg = STRBUF_INIT;
835 if (results->http_code && results->http_code != 200)
836 strbuf_addf(&msg, "HTTP %ld", results->http_code);
837 if (results->curl_result != CURLE_OK) {
838 if (msg.len)
839 strbuf_addch(&msg, ' ');
840 strbuf_addf(&msg, "curl %d", results->curl_result);
841 if (curl_errorstr[0]) {
842 strbuf_addch(&msg, ' ');
843 strbuf_addstr(&msg, curl_errorstr);
844 }
845 }
846 error(_("RPC failed; %s"), msg.buf);
847 strbuf_release(&msg);
848 }
849
850 return err;
851 }
852
853 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
854 {
855 struct active_request_slot *slot;
856 struct curl_slist *headers = http_copy_default_headers();
857 struct strbuf buf = STRBUF_INIT;
858 int err;
859
860 slot = get_active_slot();
861
862 headers = curl_slist_append(headers, rpc->hdr_content_type);
863 headers = curl_slist_append(headers, rpc->hdr_accept);
864
865 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
866 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
867 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
868 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
869 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
870 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
871 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
872 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
873 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &buf);
874
875 err = run_slot(slot, results);
876
877 curl_slist_free_all(headers);
878 strbuf_release(&buf);
879 return err;
880 }
881
882 static curl_off_t xcurl_off_t(size_t len)
883 {
884 uintmax_t size = len;
885 if (size > maximum_signed_value_of_type(curl_off_t))
886 die(_("cannot handle pushes this big"));
887 return (curl_off_t)size;
888 }
889
890 /*
891 * If flush_received is true, do not attempt to read any more; just use what's
892 * in rpc->buf.
893 */
894 static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received)
895 {
896 struct active_request_slot *slot;
897 struct curl_slist *headers = http_copy_default_headers();
898 int use_gzip = rpc->gzip_request;
899 char *gzip_body = NULL;
900 size_t gzip_size = 0;
901 int err, large_request = 0;
902 int needs_100_continue = 0;
903 struct rpc_in_data rpc_in_data;
904
905 /* Try to load the entire request, if we can fit it into the
906 * allocated buffer space we can use HTTP/1.0 and avoid the
907 * chunked encoding mess.
908 */
909 if (!flush_received) {
910 while (1) {
911 size_t n;
912 enum packet_read_status status;
913
914 if (!rpc_read_from_out(rpc, 0, &n, &status)) {
915 large_request = 1;
916 use_gzip = 0;
917 break;
918 }
919 if (status == PACKET_READ_FLUSH)
920 break;
921 }
922 }
923
924 if (large_request) {
925 struct slot_results results;
926
927 do {
928 err = probe_rpc(rpc, &results);
929 if (err == HTTP_REAUTH)
930 credential_fill(&http_auth);
931 } while (err == HTTP_REAUTH);
932 if (err != HTTP_OK)
933 return -1;
934
935 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
936 needs_100_continue = 1;
937 }
938
939 headers = curl_slist_append(headers, rpc->hdr_content_type);
940 headers = curl_slist_append(headers, rpc->hdr_accept);
941 headers = curl_slist_append(headers, needs_100_continue ?
942 "Expect: 100-continue" : "Expect:");
943
944 /* Add Accept-Language header */
945 if (rpc->hdr_accept_language)
946 headers = curl_slist_append(headers, rpc->hdr_accept_language);
947
948 /* Add the extra Git-Protocol header */
949 if (rpc->protocol_header)
950 headers = curl_slist_append(headers, rpc->protocol_header);
951
952 retry:
953 slot = get_active_slot();
954
955 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
956 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
957 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
958 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
959
960 if (large_request) {
961 /* The request body is large and the size cannot be predicted.
962 * We must use chunked encoding to send it.
963 */
964 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
965 rpc->initial_buffer = 1;
966 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
967 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
968 curl_easy_setopt(slot->curl, CURLOPT_SEEKFUNCTION, rpc_seek);
969 curl_easy_setopt(slot->curl, CURLOPT_SEEKDATA, rpc);
970 if (options.verbosity > 1) {
971 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
972 fflush(stderr);
973 }
974
975 } else if (gzip_body) {
976 /*
977 * If we are looping to retry authentication, then the previous
978 * run will have set up the headers and gzip buffer already,
979 * and we just need to send it.
980 */
981 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
982 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
983
984 } else if (use_gzip && 1024 < rpc->len) {
985 /* The client backend isn't giving us compressed data so
986 * we can try to deflate it ourselves, this may save on
987 * the transfer time.
988 */
989 git_zstream stream;
990 int ret;
991
992 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
993 gzip_size = git_deflate_bound(&stream, rpc->len);
994 gzip_body = xmalloc(gzip_size);
995
996 stream.next_in = (unsigned char *)rpc->buf;
997 stream.avail_in = rpc->len;
998 stream.next_out = (unsigned char *)gzip_body;
999 stream.avail_out = gzip_size;
1000
1001 ret = git_deflate(&stream, Z_FINISH);
1002 if (ret != Z_STREAM_END)
1003 die(_("cannot deflate request; zlib deflate error %d"), ret);
1004
1005 ret = git_deflate_end_gently(&stream);
1006 if (ret != Z_OK)
1007 die(_("cannot deflate request; zlib end error %d"), ret);
1008
1009 gzip_size = stream.total_out;
1010
1011 headers = curl_slist_append(headers, "Content-Encoding: gzip");
1012 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
1013 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
1014
1015 if (options.verbosity > 1) {
1016 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
1017 rpc->service_name,
1018 (unsigned long)rpc->len, (unsigned long)gzip_size);
1019 fflush(stderr);
1020 }
1021 } else {
1022 /* We know the complete request size in advance, use the
1023 * more normal Content-Length approach.
1024 */
1025 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
1026 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
1027 if (options.verbosity > 1) {
1028 fprintf(stderr, "POST %s (%lu bytes)\n",
1029 rpc->service_name, (unsigned long)rpc->len);
1030 fflush(stderr);
1031 }
1032 }
1033
1034 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1035 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
1036 rpc_in_data.rpc = rpc;
1037 rpc_in_data.slot = slot;
1038 rpc_in_data.check_pktline = stateless_connect;
1039 memset(&rpc_in_data.pktline_state, 0, sizeof(rpc_in_data.pktline_state));
1040 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &rpc_in_data);
1041 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1042
1043
1044 rpc->any_written = 0;
1045 err = run_slot(slot, NULL);
1046 if (err == HTTP_REAUTH && !large_request) {
1047 credential_fill(&http_auth);
1048 goto retry;
1049 }
1050 if (err != HTTP_OK)
1051 err = -1;
1052
1053 if (!rpc->any_written)
1054 err = -1;
1055
1056 if (rpc_in_data.pktline_state.len_filled)
1057 err = error(_("%d bytes of length header were received"), rpc_in_data.pktline_state.len_filled);
1058 if (rpc_in_data.pktline_state.remaining)
1059 err = error(_("%d bytes of body are still expected"), rpc_in_data.pktline_state.remaining);
1060
1061 if (stateless_connect)
1062 packet_response_end(rpc->in);
1063
1064 curl_slist_free_all(headers);
1065 free(gzip_body);
1066 return err;
1067 }
1068
1069 static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
1070 const char **client_argv, const struct strbuf *preamble,
1071 struct strbuf *rpc_result)
1072 {
1073 const char *svc = rpc->service_name;
1074 struct strbuf buf = STRBUF_INIT;
1075 struct child_process client = CHILD_PROCESS_INIT;
1076 int err = 0;
1077
1078 client.in = -1;
1079 client.out = -1;
1080 client.git_cmd = 1;
1081 strvec_pushv(&client.args, client_argv);
1082 if (start_command(&client))
1083 exit(1);
1084 write_or_die(client.in, preamble->buf, preamble->len);
1085 if (heads)
1086 write_or_die(client.in, heads->buf, heads->len);
1087
1088 rpc->alloc = http_post_buffer;
1089 rpc->buf = xmalloc(rpc->alloc);
1090 rpc->in = client.in;
1091 rpc->out = client.out;
1092
1093 strbuf_addf(&buf, "%s%s", url.buf, svc);
1094 rpc->service_url = strbuf_detach(&buf, NULL);
1095
1096 rpc->hdr_accept_language = xstrdup_or_null(http_get_accept_language_header());
1097
1098 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
1099 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
1100
1101 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
1102 rpc->hdr_accept = strbuf_detach(&buf, NULL);
1103
1104 if (get_protocol_http_header(heads->version, &buf))
1105 rpc->protocol_header = strbuf_detach(&buf, NULL);
1106 else
1107 rpc->protocol_header = NULL;
1108
1109 while (!err) {
1110 int n = packet_read(rpc->out, rpc->buf, rpc->alloc, 0);
1111 if (!n)
1112 break;
1113 rpc->pos = 0;
1114 rpc->len = n;
1115 err |= post_rpc(rpc, 0, 0);
1116 }
1117
1118 close(client.in);
1119 client.in = -1;
1120 if (!err) {
1121 strbuf_read(rpc_result, client.out, 0);
1122 } else {
1123 char buf[4096];
1124 for (;;)
1125 if (xread(client.out, buf, sizeof(buf)) <= 0)
1126 break;
1127 }
1128
1129 close(client.out);
1130 client.out = -1;
1131
1132 err |= finish_command(&client);
1133 free(rpc->service_url);
1134 free(rpc->hdr_content_type);
1135 free(rpc->hdr_accept);
1136 free(rpc->hdr_accept_language);
1137 free(rpc->protocol_header);
1138 free(rpc->buf);
1139 strbuf_release(&buf);
1140 return err;
1141 }
1142
1143 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
1144 {
1145 struct walker *walker;
1146 char **targets;
1147 int ret, i;
1148
1149 ALLOC_ARRAY(targets, nr_heads);
1150 if (options.depth || options.deepen_since)
1151 die(_("dumb http transport does not support shallow capabilities"));
1152 for (i = 0; i < nr_heads; i++)
1153 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
1154
1155 walker = get_http_walker(url.buf);
1156 walker->get_verbosely = options.verbosity >= 3;
1157 walker->get_progress = options.progress;
1158 walker->get_recover = 0;
1159 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
1160 walker_free(walker);
1161
1162 for (i = 0; i < nr_heads; i++)
1163 free(targets[i]);
1164 free(targets);
1165
1166 return ret ? error(_("fetch failed.")) : 0;
1167 }
1168
1169 static int fetch_git(struct discovery *heads,
1170 int nr_heads, struct ref **to_fetch)
1171 {
1172 struct rpc_state rpc = RPC_STATE_INIT;
1173 struct strbuf preamble = STRBUF_INIT;
1174 int i, err;
1175 struct strvec args = STRVEC_INIT;
1176 struct strbuf rpc_result = STRBUF_INIT;
1177
1178 strvec_pushl(&args, "fetch-pack", "--stateless-rpc",
1179 "--stdin", "--lock-pack", NULL);
1180 if (options.followtags)
1181 strvec_push(&args, "--include-tag");
1182 if (options.thin)
1183 strvec_push(&args, "--thin");
1184 if (options.verbosity >= 3)
1185 strvec_pushl(&args, "-v", "-v", NULL);
1186 if (options.check_self_contained_and_connected)
1187 strvec_push(&args, "--check-self-contained-and-connected");
1188 if (options.cloning)
1189 strvec_push(&args, "--cloning");
1190 if (options.update_shallow)
1191 strvec_push(&args, "--update-shallow");
1192 if (!options.progress)
1193 strvec_push(&args, "--no-progress");
1194 if (options.depth)
1195 strvec_pushf(&args, "--depth=%lu", options.depth);
1196 if (options.deepen_since)
1197 strvec_pushf(&args, "--shallow-since=%s", options.deepen_since);
1198 for (i = 0; i < options.deepen_not.nr; i++)
1199 strvec_pushf(&args, "--shallow-exclude=%s",
1200 options.deepen_not.items[i].string);
1201 if (options.deepen_relative && options.depth)
1202 strvec_push(&args, "--deepen-relative");
1203 if (options.from_promisor)
1204 strvec_push(&args, "--from-promisor");
1205 if (options.refetch)
1206 strvec_push(&args, "--refetch");
1207 if (options.filter)
1208 strvec_pushf(&args, "--filter=%s", options.filter);
1209 strvec_push(&args, url.buf);
1210
1211 for (i = 0; i < nr_heads; i++) {
1212 struct ref *ref = to_fetch[i];
1213 if (!*ref->name)
1214 die(_("cannot fetch by sha1 over smart http"));
1215 packet_buf_write(&preamble, "%s %s\n",
1216 oid_to_hex(&ref->old_oid), ref->name);
1217 }
1218 packet_buf_flush(&preamble);
1219
1220 memset(&rpc, 0, sizeof(rpc));
1221 rpc.service_name = "git-upload-pack",
1222 rpc.gzip_request = 1;
1223
1224 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1225 if (rpc_result.len)
1226 write_or_die(1, rpc_result.buf, rpc_result.len);
1227 strbuf_release(&rpc_result);
1228 strbuf_release(&preamble);
1229 strvec_clear(&args);
1230 return err;
1231 }
1232
1233 static int fetch(int nr_heads, struct ref **to_fetch)
1234 {
1235 struct discovery *d = discover_refs("git-upload-pack", 0);
1236 if (d->proto_git)
1237 return fetch_git(d, nr_heads, to_fetch);
1238 else
1239 return fetch_dumb(nr_heads, to_fetch);
1240 }
1241
1242 static void parse_fetch(struct strbuf *buf)
1243 {
1244 struct ref **to_fetch = NULL;
1245 struct ref *list_head = NULL;
1246 struct ref **list = &list_head;
1247 int alloc_heads = 0, nr_heads = 0;
1248
1249 do {
1250 const char *p;
1251 if (skip_prefix(buf->buf, "fetch ", &p)) {
1252 const char *name;
1253 struct ref *ref;
1254 struct object_id old_oid;
1255 const char *q;
1256
1257 if (parse_oid_hex(p, &old_oid, &q))
1258 die(_("protocol error: expected sha/ref, got '%s'"), p);
1259 if (*q == ' ')
1260 name = q + 1;
1261 else if (!*q)
1262 name = "";
1263 else
1264 die(_("protocol error: expected sha/ref, got '%s'"), p);
1265
1266 ref = alloc_ref(name);
1267 oidcpy(&ref->old_oid, &old_oid);
1268
1269 *list = ref;
1270 list = &ref->next;
1271
1272 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1273 to_fetch[nr_heads++] = ref;
1274 }
1275 else
1276 die(_("http transport does not support %s"), buf->buf);
1277
1278 strbuf_reset(buf);
1279 if (strbuf_getline_lf(buf, stdin) == EOF)
1280 return;
1281 if (!*buf->buf)
1282 break;
1283 } while (1);
1284
1285 if (fetch(nr_heads, to_fetch))
1286 exit(128); /* error already reported */
1287 free_refs(list_head);
1288 free(to_fetch);
1289
1290 printf("\n");
1291 fflush(stdout);
1292 strbuf_reset(buf);
1293 }
1294
1295 static void parse_get(const char *arg)
1296 {
1297 struct strbuf url = STRBUF_INIT;
1298 struct strbuf path = STRBUF_INIT;
1299 const char *space;
1300
1301 space = strchr(arg, ' ');
1302
1303 if (!space)
1304 die(_("protocol error: expected '<url> <path>', missing space"));
1305
1306 strbuf_add(&url, arg, space - arg);
1307 strbuf_addstr(&path, space + 1);
1308
1309 if (http_get_file(url.buf, path.buf, NULL))
1310 die(_("failed to download file at URL '%s'"), url.buf);
1311
1312 strbuf_release(&url);
1313 strbuf_release(&path);
1314 printf("\n");
1315 fflush(stdout);
1316 }
1317
1318 static int push_dav(int nr_spec, const char **specs)
1319 {
1320 struct child_process child = CHILD_PROCESS_INIT;
1321 size_t i;
1322
1323 child.git_cmd = 1;
1324 strvec_push(&child.args, "http-push");
1325 strvec_push(&child.args, "--helper-status");
1326 if (options.dry_run)
1327 strvec_push(&child.args, "--dry-run");
1328 if (options.verbosity > 1)
1329 strvec_push(&child.args, "--verbose");
1330 strvec_push(&child.args, url.buf);
1331 for (i = 0; i < nr_spec; i++)
1332 strvec_push(&child.args, specs[i]);
1333
1334 if (run_command(&child))
1335 die(_("git-http-push failed"));
1336 return 0;
1337 }
1338
1339 static int push_git(struct discovery *heads, int nr_spec, const char **specs)
1340 {
1341 struct rpc_state rpc = RPC_STATE_INIT;
1342 int i, err;
1343 struct strvec args;
1344 struct string_list_item *cas_option;
1345 struct strbuf preamble = STRBUF_INIT;
1346 struct strbuf rpc_result = STRBUF_INIT;
1347
1348 strvec_init(&args);
1349 strvec_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1350 NULL);
1351
1352 if (options.thin)
1353 strvec_push(&args, "--thin");
1354 if (options.dry_run)
1355 strvec_push(&args, "--dry-run");
1356 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1357 strvec_push(&args, "--signed=yes");
1358 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1359 strvec_push(&args, "--signed=if-asked");
1360 if (options.atomic)
1361 strvec_push(&args, "--atomic");
1362 if (options.verbosity == 0)
1363 strvec_push(&args, "--quiet");
1364 else if (options.verbosity > 1)
1365 strvec_push(&args, "--verbose");
1366 for (i = 0; i < options.push_options.nr; i++)
1367 strvec_pushf(&args, "--push-option=%s",
1368 options.push_options.items[i].string);
1369 strvec_push(&args, options.progress ? "--progress" : "--no-progress");
1370 for_each_string_list_item(cas_option, &cas_options)
1371 strvec_push(&args, cas_option->string);
1372 strvec_push(&args, url.buf);
1373
1374 if (options.force_if_includes)
1375 strvec_push(&args, "--force-if-includes");
1376
1377 strvec_push(&args, "--stdin");
1378 for (i = 0; i < nr_spec; i++)
1379 packet_buf_write(&preamble, "%s\n", specs[i]);
1380 packet_buf_flush(&preamble);
1381
1382 memset(&rpc, 0, sizeof(rpc));
1383 rpc.service_name = "git-receive-pack",
1384
1385 err = rpc_service(&rpc, heads, args.v, &preamble, &rpc_result);
1386 if (rpc_result.len)
1387 write_or_die(1, rpc_result.buf, rpc_result.len);
1388 strbuf_release(&rpc_result);
1389 strbuf_release(&preamble);
1390 strvec_clear(&args);
1391 return err;
1392 }
1393
1394 static int push(int nr_spec, const char **specs)
1395 {
1396 struct discovery *heads = discover_refs("git-receive-pack", 1);
1397 int ret;
1398
1399 if (heads->proto_git)
1400 ret = push_git(heads, nr_spec, specs);
1401 else
1402 ret = push_dav(nr_spec, specs);
1403 free_discovery(heads);
1404 return ret;
1405 }
1406
1407 static void parse_push(struct strbuf *buf)
1408 {
1409 struct strvec specs = STRVEC_INIT;
1410 int ret;
1411
1412 do {
1413 const char *arg;
1414 if (skip_prefix(buf->buf, "push ", &arg))
1415 strvec_push(&specs, arg);
1416 else
1417 die(_("http transport does not support %s"), buf->buf);
1418
1419 strbuf_reset(buf);
1420 if (strbuf_getline_lf(buf, stdin) == EOF)
1421 goto free_specs;
1422 if (!*buf->buf)
1423 break;
1424 } while (1);
1425
1426 ret = push(specs.nr, specs.v);
1427 printf("\n");
1428 fflush(stdout);
1429
1430 if (ret)
1431 exit(128); /* error already reported */
1432
1433 free_specs:
1434 strvec_clear(&specs);
1435 }
1436
1437 static int stateless_connect(const char *service_name)
1438 {
1439 struct discovery *discover;
1440 struct rpc_state rpc = RPC_STATE_INIT;
1441 struct strbuf buf = STRBUF_INIT;
1442 const char *accept_language;
1443
1444 /*
1445 * Run the info/refs request and see if the server supports protocol
1446 * v2. If and only if the server supports v2 can we successfully
1447 * establish a stateless connection, otherwise we need to tell the
1448 * client to fallback to using other transport helper functions to
1449 * complete their request.
1450 */
1451 discover = discover_refs(service_name, 0);
1452 if (discover->version != protocol_v2) {
1453 printf("fallback\n");
1454 fflush(stdout);
1455 return -1;
1456 } else {
1457 /* Stateless Connection established */
1458 printf("\n");
1459 fflush(stdout);
1460 }
1461 accept_language = http_get_accept_language_header();
1462 if (accept_language)
1463 rpc.hdr_accept_language = xstrfmt("%s", accept_language);
1464
1465 rpc.service_name = service_name;
1466 rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name);
1467 rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name);
1468 rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name);
1469 if (get_protocol_http_header(discover->version, &buf)) {
1470 rpc.protocol_header = strbuf_detach(&buf, NULL);
1471 } else {
1472 rpc.protocol_header = NULL;
1473 strbuf_release(&buf);
1474 }
1475 rpc.buf = xmalloc(http_post_buffer);
1476 rpc.alloc = http_post_buffer;
1477 rpc.len = 0;
1478 rpc.pos = 0;
1479 rpc.in = 1;
1480 rpc.out = 0;
1481 rpc.any_written = 0;
1482 rpc.gzip_request = 1;
1483 rpc.initial_buffer = 0;
1484 rpc.write_line_lengths = 1;
1485 rpc.flush_read_but_not_sent = 0;
1486
1487 /*
1488 * Dump the capability listing that we got from the server earlier
1489 * during the info/refs request.
1490 */
1491 write_or_die(rpc.in, discover->buf, discover->len);
1492
1493 /* Until we see EOF keep sending POSTs */
1494 while (1) {
1495 size_t avail;
1496 enum packet_read_status status;
1497
1498 if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail,
1499 &status))
1500 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
1501 if (status == PACKET_READ_EOF)
1502 break;
1503 if (post_rpc(&rpc, 1, status == PACKET_READ_FLUSH))
1504 /* We would have an err here */
1505 break;
1506 /* Reset the buffer for next request */
1507 rpc.len = 0;
1508 }
1509
1510 free(rpc.service_url);
1511 free(rpc.hdr_content_type);
1512 free(rpc.hdr_accept);
1513 free(rpc.hdr_accept_language);
1514 free(rpc.protocol_header);
1515 free(rpc.buf);
1516 strbuf_release(&buf);
1517
1518 return 0;
1519 }
1520
1521 int cmd_main(int argc, const char **argv)
1522 {
1523 struct strbuf buf = STRBUF_INIT;
1524 int nongit;
1525 int ret = 1;
1526
1527 setup_git_directory_gently(&nongit);
1528 if (argc < 2) {
1529 error(_("remote-curl: usage: git remote-curl <remote> [<url>]"));
1530 goto cleanup;
1531 }
1532
1533 options.verbosity = 1;
1534 options.progress = !!isatty(2);
1535 options.thin = 1;
1536 string_list_init_dup(&options.deepen_not);
1537 string_list_init_dup(&options.push_options);
1538
1539 /*
1540 * Just report "remote-curl" here (folding all the various aliases
1541 * ("git-remote-http", "git-remote-https", and etc.) here since they
1542 * are all just copies of the same actual executable.
1543 */
1544 trace2_cmd_name("remote-curl");
1545
1546 remote = remote_get(argv[1]);
1547
1548 if (argc > 2) {
1549 end_url_with_slash(&url, argv[2]);
1550 } else {
1551 end_url_with_slash(&url, remote->url[0]);
1552 }
1553
1554 http_init(remote, url.buf, 0);
1555
1556 do {
1557 const char *arg;
1558
1559 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1560 if (ferror(stdin))
1561 error(_("remote-curl: error reading command stream from git"));
1562 goto cleanup;
1563 }
1564 if (buf.len == 0)
1565 break;
1566 if (starts_with(buf.buf, "fetch ")) {
1567 if (nongit)
1568 die(_("remote-curl: fetch attempted without a local repo"));
1569 parse_fetch(&buf);
1570
1571 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1572 int for_push = !!strstr(buf.buf + 4, "for-push");
1573 output_refs(get_refs(for_push));
1574
1575 } else if (starts_with(buf.buf, "push ")) {
1576 parse_push(&buf);
1577
1578 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1579 char *value = strchr(arg, ' ');
1580 int result;
1581
1582 if (value)
1583 *value++ = '\0';
1584 else
1585 value = "true";
1586
1587 result = set_option(arg, value);
1588 if (!result)
1589 printf("ok\n");
1590 else if (result < 0)
1591 printf("error invalid value\n");
1592 else
1593 printf("unsupported\n");
1594 fflush(stdout);
1595
1596 } else if (skip_prefix(buf.buf, "get ", &arg)) {
1597 parse_get(arg);
1598 fflush(stdout);
1599
1600 } else if (!strcmp(buf.buf, "capabilities")) {
1601 printf("stateless-connect\n");
1602 printf("fetch\n");
1603 printf("get\n");
1604 printf("option\n");
1605 printf("push\n");
1606 printf("check-connectivity\n");
1607 printf("object-format\n");
1608 printf("\n");
1609 fflush(stdout);
1610 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1611 if (!stateless_connect(arg))
1612 break;
1613 } else {
1614 error(_("remote-curl: unknown command '%s' from git"), buf.buf);
1615 goto cleanup;
1616 }
1617 strbuf_reset(&buf);
1618 } while (1);
1619
1620 http_cleanup();
1621 ret = 0;
1622 cleanup:
1623 strbuf_release(&buf);
1624
1625 return ret;
1626 }
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