remote-curl: define struct for CURLOPT_WRITEFUNCTION
[git/git.git] / remote-curl.c
CommitLineData
a2d725b7 1#include "cache.h"
b2141fc1 2#include "config.h"
a2d725b7 3#include "remote.h"
ad6ac124 4#include "connect.h"
a2d725b7
DB
5#include "strbuf.h"
6#include "walker.h"
7#include "http.h"
d807c4a0 8#include "exec-cmd.h"
ae4efe19 9#include "run-command.h"
97cc7bc4 10#include "pkt-line.h"
05c1eb10 11#include "string-list.h"
de1a2fdd 12#include "sideband.h"
222b1212 13#include "argv-array.h"
2501aff8 14#include "credential.h"
16094885 15#include "sha1-array.h"
30261094 16#include "send-pack.h"
ad6ac124 17#include "protocol.h"
90dce21e 18#include "quote.h"
a2d725b7 19
37a8768f 20static struct remote *remote;
b227bbc4
JK
21/* always ends with a trailing slash */
22static struct strbuf url = STRBUF_INIT;
37a8768f 23
ef08ef9e
SP
24struct options {
25 int verbosity;
26 unsigned long depth;
508ea882 27 char *deepen_since;
a45a2600 28 struct string_list deepen_not;
511155db 29 struct string_list push_options;
acb0c572 30 char *filter;
ef08ef9e 31 unsigned progress : 1,
9ba38048 32 check_self_contained_and_connected : 1,
16094885
NTND
33 cloning : 1,
34 update_shallow : 1,
ae4efe19 35 followtags : 1,
de1a2fdd 36 dry_run : 1,
0ea47f9d 37 thin : 1,
30261094 38 /* One of the SEND_PACK_PUSH_CERT_* constants. */
cccf74e2 39 push_cert : 2,
88e2f9ed
JT
40 deepen_relative : 1,
41 from_promisor : 1,
42 no_dependents : 1;
ef08ef9e
SP
43};
44static struct options options;
05c1eb10 45static struct string_list cas_options = STRING_LIST_INIT_DUP;
ef08ef9e 46
ef08ef9e
SP
47static int set_option(const char *name, const char *value)
48{
49 if (!strcmp(name, "verbosity")) {
50 char *end;
51 int v = strtol(value, &end, 10);
52 if (value == end || *end)
53 return -1;
54 options.verbosity = v;
55 return 0;
56 }
57 else if (!strcmp(name, "progress")) {
58 if (!strcmp(value, "true"))
59 options.progress = 1;
60 else if (!strcmp(value, "false"))
61 options.progress = 0;
62 else
63 return -1;
249b2004 64 return 0;
ef08ef9e
SP
65 }
66 else if (!strcmp(name, "depth")) {
67 char *end;
68 unsigned long v = strtoul(value, &end, 10);
69 if (value == end || *end)
70 return -1;
71 options.depth = v;
249b2004 72 return 0;
ef08ef9e 73 }
508ea882
NTND
74 else if (!strcmp(name, "deepen-since")) {
75 options.deepen_since = xstrdup(value);
76 return 0;
77 }
a45a2600
NTND
78 else if (!strcmp(name, "deepen-not")) {
79 string_list_append(&options.deepen_not, value);
80 return 0;
81 }
cccf74e2
NTND
82 else if (!strcmp(name, "deepen-relative")) {
83 if (!strcmp(value, "true"))
84 options.deepen_relative = 1;
85 else if (!strcmp(value, "false"))
86 options.deepen_relative = 0;
87 else
88 return -1;
89 return 0;
90 }
ef08ef9e
SP
91 else if (!strcmp(name, "followtags")) {
92 if (!strcmp(value, "true"))
93 options.followtags = 1;
94 else if (!strcmp(value, "false"))
95 options.followtags = 0;
96 else
97 return -1;
249b2004 98 return 0;
ef08ef9e 99 }
ae4efe19
SP
100 else if (!strcmp(name, "dry-run")) {
101 if (!strcmp(value, "true"))
102 options.dry_run = 1;
103 else if (!strcmp(value, "false"))
104 options.dry_run = 0;
105 else
106 return -1;
107 return 0;
108 }
9ba38048
NTND
109 else if (!strcmp(name, "check-connectivity")) {
110 if (!strcmp(value, "true"))
111 options.check_self_contained_and_connected = 1;
112 else if (!strcmp(value, "false"))
113 options.check_self_contained_and_connected = 0;
114 else
115 return -1;
116 return 0;
117 }
05c1eb10
JH
118 else if (!strcmp(name, "cas")) {
119 struct strbuf val = STRBUF_INIT;
120 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
121 string_list_append(&cas_options, val.buf);
122 strbuf_release(&val);
123 return 0;
16094885
NTND
124 } else if (!strcmp(name, "cloning")) {
125 if (!strcmp(value, "true"))
126 options.cloning = 1;
127 else if (!strcmp(value, "false"))
128 options.cloning = 0;
129 else
130 return -1;
131 return 0;
132 } else if (!strcmp(name, "update-shallow")) {
133 if (!strcmp(value, "true"))
134 options.update_shallow = 1;
135 else if (!strcmp(value, "false"))
136 options.update_shallow = 0;
137 else
138 return -1;
139 return 0;
0ea47f9d
JH
140 } else if (!strcmp(name, "pushcert")) {
141 if (!strcmp(value, "true"))
30261094 142 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
0ea47f9d 143 else if (!strcmp(value, "false"))
30261094
DB
144 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
145 else if (!strcmp(value, "if-asked"))
146 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
0ea47f9d
JH
147 else
148 return -1;
149 return 0;
511155db 150 } else if (!strcmp(name, "push-option")) {
90dce21e
JK
151 if (*value != '"')
152 string_list_append(&options.push_options, value);
153 else {
154 struct strbuf unquoted = STRBUF_INIT;
155 if (unquote_c_style(&unquoted, value, NULL) < 0)
156 die("invalid quoting in push-option value");
157 string_list_append_nodup(&options.push_options,
158 strbuf_detach(&unquoted, NULL));
159 }
511155db 160 return 0;
c915f11e
EW
161
162#if LIBCURL_VERSION_NUM >= 0x070a08
163 } else if (!strcmp(name, "family")) {
164 if (!strcmp(value, "ipv4"))
165 git_curl_ipresolve = CURL_IPRESOLVE_V4;
166 else if (!strcmp(value, "ipv6"))
167 git_curl_ipresolve = CURL_IPRESOLVE_V6;
168 else if (!strcmp(value, "all"))
169 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
170 else
171 return -1;
172 return 0;
173#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
88e2f9ed
JT
174 } else if (!strcmp(name, "from-promisor")) {
175 options.from_promisor = 1;
176 return 0;
177 } else if (!strcmp(name, "no-dependents")) {
178 options.no_dependents = 1;
179 return 0;
acb0c572 180 } else if (!strcmp(name, "filter")) {
c3b9bc94 181 options.filter = xstrdup(value);
acb0c572 182 return 0;
16094885 183 } else {
ef08ef9e
SP
184 return 1 /* unsupported */;
185 }
186}
187
97cc7bc4 188struct discovery {
f08a5d42 189 char *service;
97cc7bc4
SP
190 char *buf_alloc;
191 char *buf;
192 size_t len;
2a455202 193 struct ref *refs;
910650d2 194 struct oid_array shallow;
49e85e95 195 enum protocol_version version;
97cc7bc4
SP
196 unsigned proto_git : 1;
197};
198static struct discovery *last_discovery;
199
b8054bbe
JK
200static struct ref *parse_git_refs(struct discovery *heads, int for_push)
201{
202 struct ref *list = NULL;
ad6ac124
BW
203 struct packet_reader reader;
204
205 packet_reader_init(&reader, -1, heads->buf, heads->len,
206 PACKET_READ_CHOMP_NEWLINE |
207 PACKET_READ_GENTLE_ON_EOF);
208
49e85e95
BW
209 heads->version = discover_version(&reader);
210 switch (heads->version) {
8f6982b4 211 case protocol_v2:
0f1dc53f
BW
212 /*
213 * Do nothing. This isn't a list of refs but rather a
214 * capability advertisement. Client would have run
215 * 'stateless-connect' so we'll dump this capability listing
216 * and let them request the refs themselves.
217 */
8f6982b4 218 break;
ad6ac124
BW
219 case protocol_v1:
220 case protocol_v0:
221 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
222 NULL, &heads->shallow);
223 break;
224 case protocol_unknown_version:
225 BUG("unknown protocol version");
226 }
227
b8054bbe
JK
228 return list;
229}
230
231static struct ref *parse_info_refs(struct discovery *heads)
232{
233 char *data, *start, *mid;
234 char *ref_name;
235 int i = 0;
236
237 struct ref *refs = NULL;
238 struct ref *ref = NULL;
239 struct ref *last_ref = NULL;
240
241 data = heads->buf;
242 start = NULL;
243 mid = data;
244 while (i < heads->len) {
245 if (!start) {
246 start = &data[i];
247 }
248 if (data[i] == '\t')
249 mid = &data[i];
250 if (data[i] == '\n') {
251 if (mid - start != 40)
b227bbc4
JK
252 die("%sinfo/refs not valid: is this a git repository?",
253 url.buf);
b8054bbe
JK
254 data[i] = 0;
255 ref_name = mid + 1;
6f687c21 256 ref = alloc_ref(ref_name);
f4e54d02 257 get_oid_hex(start, &ref->old_oid);
b8054bbe
JK
258 if (!refs)
259 refs = ref;
260 if (last_ref)
261 last_ref->next = ref;
262 last_ref = ref;
263 start = NULL;
264 }
265 i++;
266 }
267
268 ref = alloc_ref("HEAD");
b227bbc4 269 if (!http_fetch_ref(url.buf, ref) &&
b8054bbe
JK
270 !resolve_remote_symref(ref, refs)) {
271 ref->next = refs;
272 refs = ref;
273 } else {
274 free(ref);
275 }
276
277 return refs;
278}
279
97cc7bc4
SP
280static void free_discovery(struct discovery *d)
281{
282 if (d) {
283 if (d == last_discovery)
284 last_discovery = NULL;
ee3051bd 285 free(d->shallow.oid);
97cc7bc4 286 free(d->buf_alloc);
2a455202 287 free_refs(d->refs);
f08a5d42 288 free(d->service);
97cc7bc4
SP
289 free(d);
290 }
291}
292
fc1b774c
JK
293static int show_http_message(struct strbuf *type, struct strbuf *charset,
294 struct strbuf *msg)
426e70d4
JK
295{
296 const char *p, *eol;
297
298 /*
299 * We only show text/plain parts, as other types are likely
300 * to be ugly to look at on the user's terminal.
426e70d4 301 */
bf197fd7 302 if (strcmp(type->buf, "text/plain"))
426e70d4 303 return -1;
fc1b774c
JK
304 if (charset->len)
305 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
426e70d4
JK
306
307 strbuf_trim(msg);
308 if (!msg->len)
309 return -1;
310
311 p = msg->buf;
312 do {
313 eol = strchrnul(p, '\n');
314 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
315 p = eol + 1;
316 } while(*eol);
317 return 0;
318}
319
884e586f
BW
320static int get_protocol_http_header(enum protocol_version version,
321 struct strbuf *header)
322{
323 if (version > 0) {
324 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
325 version);
326
327 return 1;
328 }
329
330 return 0;
331}
332
24d36f14 333static struct discovery *discover_refs(const char *service, int for_push)
a2d725b7 334{
4656bf47
SP
335 struct strbuf exp = STRBUF_INIT;
336 struct strbuf type = STRBUF_INIT;
fc1b774c 337 struct strbuf charset = STRBUF_INIT;
a2d725b7 338 struct strbuf buffer = STRBUF_INIT;
c65d5692 339 struct strbuf refs_url = STRBUF_INIT;
050ef365 340 struct strbuf effective_url = STRBUF_INIT;
884e586f
BW
341 struct strbuf protocol_header = STRBUF_INIT;
342 struct string_list extra_headers = STRING_LIST_INIT_DUP;
97cc7bc4 343 struct discovery *last = last_discovery;
243c329c 344 int http_ret, maybe_smart = 0;
fcaa6e64 345 struct http_get_options http_options;
a4d78ce2 346 enum protocol_version version = get_protocol_version_config();
a2d725b7 347
97cc7bc4
SP
348 if (last && !strcmp(service, last->service))
349 return last;
350 free_discovery(last);
a2d725b7 351
b227bbc4 352 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
59556548 353 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
02572c2e 354 git_env_bool("GIT_SMART_HTTP", 1)) {
243c329c 355 maybe_smart = 1;
b227bbc4 356 if (!strchr(url.buf, '?'))
c65d5692 357 strbuf_addch(&refs_url, '?');
97cc7bc4 358 else
c65d5692
JK
359 strbuf_addch(&refs_url, '&');
360 strbuf_addf(&refs_url, "service=%s", service);
97cc7bc4 361 }
a2d725b7 362
a4d78ce2
BW
363 /*
364 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
365 * to perform a push, then fallback to v0 since the client doesn't know
366 * how to push yet using v2.
367 */
368 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
369 version = protocol_v0;
370
884e586f 371 /* Add the extra Git-Protocol header */
a4d78ce2 372 if (get_protocol_http_header(version, &protocol_header))
884e586f
BW
373 string_list_append(&extra_headers, protocol_header.buf);
374
fcaa6e64
JK
375 memset(&http_options, 0, sizeof(http_options));
376 http_options.content_type = &type;
377 http_options.charset = &charset;
378 http_options.effective_url = &effective_url;
379 http_options.base_url = &url;
884e586f 380 http_options.extra_headers = &extra_headers;
50d34137 381 http_options.initial_request = 1;
fcaa6e64 382 http_options.no_cache = 1;
1bbcc224 383
fcaa6e64 384 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
a2d725b7
DB
385 switch (http_ret) {
386 case HTTP_OK:
387 break;
388 case HTTP_MISSING_TARGET:
fc1b774c 389 show_http_message(&type, &charset, &buffer);
b227bbc4 390 die("repository '%s' not found", url.buf);
42653c09 391 case HTTP_NOAUTH:
fc1b774c 392 show_http_message(&type, &charset, &buffer);
b227bbc4 393 die("Authentication failed for '%s'", url.buf);
a2d725b7 394 default:
fc1b774c 395 show_http_message(&type, &charset, &buffer);
b227bbc4 396 die("unable to access '%s': %s", url.buf, curl_errorstr);
a2d725b7
DB
397 }
398
50d34137
JK
399 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
400 warning(_("redirecting to %s"), url.buf);
401
97cc7bc4 402 last= xcalloc(1, sizeof(*last_discovery));
f08a5d42 403 last->service = xstrdup(service);
97cc7bc4
SP
404 last->buf_alloc = strbuf_detach(&buffer, &last->len);
405 last->buf = last->buf_alloc;
406
4656bf47
SP
407 strbuf_addf(&exp, "application/x-%s-advertisement", service);
408 if (maybe_smart &&
409 (5 <= last->len && last->buf[4] == '#') &&
410 !strbuf_cmp(&exp, &type)) {
4981fe75
JK
411 char *line;
412
4656bf47
SP
413 /*
414 * smart HTTP response; validate that the service
97cc7bc4
SP
415 * pkt-line matches our request.
416 */
4981fe75 417 line = packet_read_line_buf(&last->buf, &last->len, NULL);
bb1356dc
JS
418 if (!line)
419 die("invalid server response; expected service, got flush packet");
97cc7bc4 420
4656bf47 421 strbuf_reset(&exp);
97cc7bc4 422 strbuf_addf(&exp, "# service=%s", service);
4981fe75
JK
423 if (strcmp(line, exp.buf))
424 die("invalid server response; got '%s'", line);
97cc7bc4
SP
425 strbuf_release(&exp);
426
427 /* The header can include additional metadata lines, up
428 * until a packet flush marker. Ignore these now, but
429 * in the future we might start to scan them.
430 */
4981fe75
JK
431 while (packet_read_line_buf(&last->buf, &last->len, NULL))
432 ;
97cc7bc4
SP
433
434 last->proto_git = 1;
237ffedd
BW
435 } else if (maybe_smart &&
436 last->len > 5 && starts_with(last->buf + 4, "version 2")) {
437 last->proto_git = 1;
97cc7bc4
SP
438 }
439
2a455202
JK
440 if (last->proto_git)
441 last->refs = parse_git_refs(last, for_push);
442 else
443 last->refs = parse_info_refs(last);
444
c65d5692 445 strbuf_release(&refs_url);
4656bf47
SP
446 strbuf_release(&exp);
447 strbuf_release(&type);
fc1b774c 448 strbuf_release(&charset);
050ef365 449 strbuf_release(&effective_url);
97cc7bc4 450 strbuf_release(&buffer);
884e586f
BW
451 strbuf_release(&protocol_header);
452 string_list_clear(&extra_headers, 0);
97cc7bc4
SP
453 last_discovery = last;
454 return last;
455}
456
97cc7bc4
SP
457static struct ref *get_refs(int for_push)
458{
459 struct discovery *heads;
460
461 if (for_push)
2a455202 462 heads = discover_refs("git-receive-pack", for_push);
97cc7bc4 463 else
2a455202 464 heads = discover_refs("git-upload-pack", for_push);
97cc7bc4 465
2a455202 466 return heads->refs;
97cc7bc4
SP
467}
468
ae4efe19
SP
469static void output_refs(struct ref *refs)
470{
471 struct ref *posn;
472 for (posn = refs; posn; posn = posn->next) {
473 if (posn->symref)
474 printf("@%s %s\n", posn->symref, posn->name);
475 else
f4e54d02 476 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
ae4efe19
SP
477 }
478 printf("\n");
479 fflush(stdout);
ae4efe19
SP
480}
481
de1a2fdd
SP
482struct rpc_state {
483 const char *service_name;
484 const char **argv;
8150749d 485 struct strbuf *stdin_preamble;
de1a2fdd
SP
486 char *service_url;
487 char *hdr_content_type;
488 char *hdr_accept;
884e586f 489 char *protocol_header;
de1a2fdd
SP
490 char *buf;
491 size_t alloc;
492 size_t len;
493 size_t pos;
494 int in;
495 int out;
296b847c 496 int any_written;
de1a2fdd 497 struct strbuf result;
b8538603 498 unsigned gzip_request : 1;
6c81a990 499 unsigned initial_buffer : 1;
de1a2fdd
SP
500};
501
502static size_t rpc_out(void *ptr, size_t eltsize,
503 size_t nmemb, void *buffer_)
504{
505 size_t max = eltsize * nmemb;
506 struct rpc_state *rpc = buffer_;
507 size_t avail = rpc->len - rpc->pos;
508
509 if (!avail) {
6c81a990 510 rpc->initial_buffer = 0;
4981fe75 511 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
de1a2fdd
SP
512 if (!avail)
513 return 0;
514 rpc->pos = 0;
515 rpc->len = avail;
516 }
517
48310608 518 if (max < avail)
de1a2fdd
SP
519 avail = max;
520 memcpy(ptr, rpc->buf + rpc->pos, avail);
521 rpc->pos += avail;
522 return avail;
523}
524
6c81a990 525#ifndef NO_CURL_IOCTL
5092d3ec 526static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
6c81a990
MS
527{
528 struct rpc_state *rpc = clientp;
529
530 switch (cmd) {
531 case CURLIOCMD_NOP:
532 return CURLIOE_OK;
533
534 case CURLIOCMD_RESTARTREAD:
535 if (rpc->initial_buffer) {
536 rpc->pos = 0;
537 return CURLIOE_OK;
538 }
b725b270 539 error("unable to rewind rpc post data - try increasing http.postBuffer");
6c81a990
MS
540 return CURLIOE_FAILRESTART;
541
542 default:
543 return CURLIOE_UNKNOWNCMD;
544 }
545}
546#endif
547
cf2fb92b
MS
548struct rpc_in_data {
549 struct rpc_state *rpc;
550};
551
552/*
553 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
554 * from ptr.
555 */
a04ff3ec 556static size_t rpc_in(char *ptr, size_t eltsize,
de1a2fdd
SP
557 size_t nmemb, void *buffer_)
558{
559 size_t size = eltsize * nmemb;
cf2fb92b 560 struct rpc_in_data *data = buffer_;
296b847c 561 if (size)
cf2fb92b
MS
562 data->rpc->any_written = 1;
563 write_or_die(data->rpc->in, ptr, size);
de1a2fdd
SP
564 return size;
565}
566
3a347ed7
JK
567static int run_slot(struct active_request_slot *slot,
568 struct slot_results *results)
206b099d 569{
b81401c1 570 int err;
3a347ed7 571 struct slot_results results_buf;
206b099d 572
3a347ed7
JK
573 if (!results)
574 results = &results_buf;
575
beed336c 576 err = run_one_slot(slot, results);
206b099d 577
b81401c1 578 if (err != HTTP_OK && err != HTTP_REAUTH) {
00540458
SP
579 struct strbuf msg = STRBUF_INIT;
580 if (results->http_code && results->http_code != 200)
581 strbuf_addf(&msg, "HTTP %ld", results->http_code);
582 if (results->curl_result != CURLE_OK) {
583 if (msg.len)
584 strbuf_addch(&msg, ' ');
585 strbuf_addf(&msg, "curl %d", results->curl_result);
586 if (curl_errorstr[0]) {
587 strbuf_addch(&msg, ' ');
588 strbuf_addstr(&msg, curl_errorstr);
589 }
590 }
591 error("RPC failed; %s", msg.buf);
592 strbuf_release(&msg);
206b099d
SP
593 }
594
595 return err;
596}
597
3a347ed7 598static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
206b099d
SP
599{
600 struct active_request_slot *slot;
8cb01e2f 601 struct curl_slist *headers = http_copy_default_headers();
206b099d
SP
602 struct strbuf buf = STRBUF_INIT;
603 int err;
604
605 slot = get_active_slot();
606
607 headers = curl_slist_append(headers, rpc->hdr_content_type);
608 headers = curl_slist_append(headers, rpc->hdr_accept);
609
610 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
611 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
612 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
aa90b969 613 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
206b099d
SP
614 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
615 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
616 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
617 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
618 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
619
3a347ed7 620 err = run_slot(slot, results);
206b099d
SP
621
622 curl_slist_free_all(headers);
623 strbuf_release(&buf);
624 return err;
625}
626
cb8010bb
TB
627static curl_off_t xcurl_off_t(size_t len) {
628 uintmax_t size = len;
629 if (size > maximum_signed_value_of_type(curl_off_t))
37ee680d 630 die("cannot handle pushes this big");
cb8010bb 631 return (curl_off_t)size;
37ee680d
DT
632}
633
de1a2fdd
SP
634static int post_rpc(struct rpc_state *rpc)
635{
636 struct active_request_slot *slot;
8cb01e2f 637 struct curl_slist *headers = http_copy_default_headers();
b8538603
SP
638 int use_gzip = rpc->gzip_request;
639 char *gzip_body = NULL;
37711549 640 size_t gzip_size = 0;
206b099d 641 int err, large_request = 0;
c80d96ca 642 int needs_100_continue = 0;
cf2fb92b 643 struct rpc_in_data rpc_in_data;
de1a2fdd
SP
644
645 /* Try to load the entire request, if we can fit it into the
646 * allocated buffer space we can use HTTP/1.0 and avoid the
647 * chunked encoding mess.
648 */
649 while (1) {
650 size_t left = rpc->alloc - rpc->len;
651 char *buf = rpc->buf + rpc->len;
652 int n;
653
654 if (left < LARGE_PACKET_MAX) {
655 large_request = 1;
b8538603 656 use_gzip = 0;
de1a2fdd
SP
657 break;
658 }
659
4981fe75 660 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
de1a2fdd
SP
661 if (!n)
662 break;
663 rpc->len += n;
664 }
665
206b099d 666 if (large_request) {
c80d96ca 667 struct slot_results results;
668
b81401c1 669 do {
c80d96ca 670 err = probe_rpc(rpc, &results);
2501aff8
JK
671 if (err == HTTP_REAUTH)
672 credential_fill(&http_auth);
b81401c1
JK
673 } while (err == HTTP_REAUTH);
674 if (err != HTTP_OK)
675 return -1;
c80d96ca 676
677 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
678 needs_100_continue = 1;
206b099d
SP
679 }
680
abf8df86
JK
681 headers = curl_slist_append(headers, rpc->hdr_content_type);
682 headers = curl_slist_append(headers, rpc->hdr_accept);
c80d96ca 683 headers = curl_slist_append(headers, needs_100_continue ?
684 "Expect: 100-continue" : "Expect:");
abf8df86 685
884e586f
BW
686 /* Add the extra Git-Protocol header */
687 if (rpc->protocol_header)
688 headers = curl_slist_append(headers, rpc->protocol_header);
689
abf8df86 690retry:
de1a2fdd 691 slot = get_active_slot();
de1a2fdd 692
de1a2fdd 693 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
d21f9794 694 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
de1a2fdd 695 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
1a53e692 696 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
de1a2fdd 697
de1a2fdd
SP
698 if (large_request) {
699 /* The request body is large and the size cannot be predicted.
700 * We must use chunked encoding to send it.
701 */
de1a2fdd 702 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
6c81a990 703 rpc->initial_buffer = 1;
de1a2fdd
SP
704 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
705 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
6c81a990
MS
706#ifndef NO_CURL_IOCTL
707 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
708 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
709#endif
de1a2fdd
SP
710 if (options.verbosity > 1) {
711 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
712 fflush(stderr);
713 }
714
2e736fd5
JK
715 } else if (gzip_body) {
716 /*
717 * If we are looping to retry authentication, then the previous
718 * run will have set up the headers and gzip buffer already,
719 * and we just need to send it.
720 */
721 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
37ee680d 722 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
2e736fd5 723
b8538603
SP
724 } else if (use_gzip && 1024 < rpc->len) {
725 /* The client backend isn't giving us compressed data so
a8132410 726 * we can try to deflate it ourselves, this may save on
b8538603
SP
727 * the transfer time.
728 */
ef49a7a0 729 git_zstream stream;
b8538603
SP
730 int ret;
731
55bb5c91 732 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
df126e10
JK
733 gzip_size = git_deflate_bound(&stream, rpc->len);
734 gzip_body = xmalloc(gzip_size);
b8538603
SP
735
736 stream.next_in = (unsigned char *)rpc->buf;
737 stream.avail_in = rpc->len;
738 stream.next_out = (unsigned char *)gzip_body;
df126e10 739 stream.avail_out = gzip_size;
b8538603 740
55bb5c91 741 ret = git_deflate(&stream, Z_FINISH);
b8538603
SP
742 if (ret != Z_STREAM_END)
743 die("cannot deflate request; zlib deflate error %d", ret);
744
55bb5c91 745 ret = git_deflate_end_gently(&stream);
b8538603
SP
746 if (ret != Z_OK)
747 die("cannot deflate request; zlib end error %d", ret);
748
df126e10 749 gzip_size = stream.total_out;
b8538603
SP
750
751 headers = curl_slist_append(headers, "Content-Encoding: gzip");
752 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
37ee680d 753 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
b8538603
SP
754
755 if (options.verbosity > 1) {
756 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
757 rpc->service_name,
df126e10 758 (unsigned long)rpc->len, (unsigned long)gzip_size);
b8538603
SP
759 fflush(stderr);
760 }
de1a2fdd
SP
761 } else {
762 /* We know the complete request size in advance, use the
763 * more normal Content-Length approach.
764 */
765 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
37ee680d 766 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
de1a2fdd
SP
767 if (options.verbosity > 1) {
768 fprintf(stderr, "POST %s (%lu bytes)\n",
769 rpc->service_name, (unsigned long)rpc->len);
770 fflush(stderr);
771 }
772 }
773
774 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
775 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
cf2fb92b
MS
776 rpc_in_data.rpc = rpc;
777 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
de1a2fdd 778
296b847c
DT
779
780 rpc->any_written = 0;
3a347ed7 781 err = run_slot(slot, NULL);
2501aff8
JK
782 if (err == HTTP_REAUTH && !large_request) {
783 credential_fill(&http_auth);
abf8df86 784 goto retry;
2501aff8 785 }
b81401c1
JK
786 if (err != HTTP_OK)
787 err = -1;
de1a2fdd 788
296b847c
DT
789 if (!rpc->any_written)
790 err = -1;
791
de1a2fdd 792 curl_slist_free_all(headers);
b8538603 793 free(gzip_body);
de1a2fdd
SP
794 return err;
795}
796
797static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
798{
799 const char *svc = rpc->service_name;
800 struct strbuf buf = STRBUF_INIT;
8150749d 801 struct strbuf *preamble = rpc->stdin_preamble;
d3180279 802 struct child_process client = CHILD_PROCESS_INIT;
de1a2fdd
SP
803 int err = 0;
804
de1a2fdd
SP
805 client.in = -1;
806 client.out = -1;
807 client.git_cmd = 1;
808 client.argv = rpc->argv;
809 if (start_command(&client))
810 exit(1);
8150749d
IT
811 if (preamble)
812 write_or_die(client.in, preamble->buf, preamble->len);
de1a2fdd
SP
813 if (heads)
814 write_or_die(client.in, heads->buf, heads->len);
815
816 rpc->alloc = http_post_buffer;
817 rpc->buf = xmalloc(rpc->alloc);
818 rpc->in = client.in;
819 rpc->out = client.out;
820 strbuf_init(&rpc->result, 0);
821
b227bbc4 822 strbuf_addf(&buf, "%s%s", url.buf, svc);
de1a2fdd
SP
823 rpc->service_url = strbuf_detach(&buf, NULL);
824
825 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
826 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
827
8efa5f62 828 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
de1a2fdd
SP
829 rpc->hdr_accept = strbuf_detach(&buf, NULL);
830
884e586f
BW
831 if (get_protocol_http_header(heads->version, &buf))
832 rpc->protocol_header = strbuf_detach(&buf, NULL);
833 else
834 rpc->protocol_header = NULL;
835
de1a2fdd 836 while (!err) {
4981fe75 837 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
de1a2fdd
SP
838 if (!n)
839 break;
840 rpc->pos = 0;
841 rpc->len = n;
842 err |= post_rpc(rpc);
843 }
de1a2fdd
SP
844
845 close(client.in);
de1a2fdd 846 client.in = -1;
6cdf0223
SP
847 if (!err) {
848 strbuf_read(&rpc->result, client.out, 0);
849 } else {
850 char buf[4096];
851 for (;;)
852 if (xread(client.out, buf, sizeof(buf)) <= 0)
853 break;
854 }
b4ee10f6
SP
855
856 close(client.out);
de1a2fdd
SP
857 client.out = -1;
858
859 err |= finish_command(&client);
860 free(rpc->service_url);
861 free(rpc->hdr_content_type);
862 free(rpc->hdr_accept);
884e586f 863 free(rpc->protocol_header);
de1a2fdd
SP
864 free(rpc->buf);
865 strbuf_release(&buf);
866 return err;
867}
868
292ce46b
SP
869static int fetch_dumb(int nr_heads, struct ref **to_fetch)
870{
26e1e0b2 871 struct walker *walker;
b32fa95f 872 char **targets;
292ce46b
SP
873 int ret, i;
874
b32fa95f 875 ALLOC_ARRAY(targets, nr_heads);
508ea882
NTND
876 if (options.depth || options.deepen_since)
877 die("dumb http transport does not support shallow capabilities");
292ce46b 878 for (i = 0; i < nr_heads; i++)
f4e54d02 879 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
292ce46b 880
b227bbc4 881 walker = get_http_walker(url.buf);
ef08ef9e 882 walker->get_verbosely = options.verbosity >= 3;
292ce46b
SP
883 walker->get_recover = 0;
884 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
26e1e0b2 885 walker_free(walker);
292ce46b
SP
886
887 for (i = 0; i < nr_heads; i++)
888 free(targets[i]);
889 free(targets);
890
b725b270 891 return ret ? error("fetch failed.") : 0;
292ce46b
SP
892}
893
249b2004
SP
894static int fetch_git(struct discovery *heads,
895 int nr_heads, struct ref **to_fetch)
896{
897 struct rpc_state rpc;
8150749d 898 struct strbuf preamble = STRBUF_INIT;
b5f62ebe
NTND
899 int i, err;
900 struct argv_array args = ARGV_ARRAY_INIT;
901
902 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
903 "--stdin", "--lock-pack", NULL);
249b2004 904 if (options.followtags)
b5f62ebe 905 argv_array_push(&args, "--include-tag");
249b2004 906 if (options.thin)
b5f62ebe
NTND
907 argv_array_push(&args, "--thin");
908 if (options.verbosity >= 3)
909 argv_array_pushl(&args, "-v", "-v", NULL);
9ba38048 910 if (options.check_self_contained_and_connected)
b5f62ebe 911 argv_array_push(&args, "--check-self-contained-and-connected");
16094885 912 if (options.cloning)
b5f62ebe 913 argv_array_push(&args, "--cloning");
16094885 914 if (options.update_shallow)
b5f62ebe 915 argv_array_push(&args, "--update-shallow");
249b2004 916 if (!options.progress)
b5f62ebe
NTND
917 argv_array_push(&args, "--no-progress");
918 if (options.depth)
919 argv_array_pushf(&args, "--depth=%lu", options.depth);
508ea882
NTND
920 if (options.deepen_since)
921 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
a45a2600
NTND
922 for (i = 0; i < options.deepen_not.nr; i++)
923 argv_array_pushf(&args, "--shallow-exclude=%s",
924 options.deepen_not.items[i].string);
cccf74e2
NTND
925 if (options.deepen_relative && options.depth)
926 argv_array_push(&args, "--deepen-relative");
88e2f9ed
JT
927 if (options.from_promisor)
928 argv_array_push(&args, "--from-promisor");
929 if (options.no_dependents)
930 argv_array_push(&args, "--no-dependents");
acb0c572
JH
931 if (options.filter)
932 argv_array_pushf(&args, "--filter=%s", options.filter);
b5f62ebe 933 argv_array_push(&args, url.buf);
8150749d 934
249b2004
SP
935 for (i = 0; i < nr_heads; i++) {
936 struct ref *ref = to_fetch[i];
94ee8e2c 937 if (!*ref->name)
249b2004 938 die("cannot fetch by sha1 over smart http");
58f2ed05 939 packet_buf_write(&preamble, "%s %s\n",
f4e54d02 940 oid_to_hex(&ref->old_oid), ref->name);
249b2004 941 }
8150749d 942 packet_buf_flush(&preamble);
249b2004
SP
943
944 memset(&rpc, 0, sizeof(rpc));
945 rpc.service_name = "git-upload-pack",
b5f62ebe 946 rpc.argv = args.argv;
8150749d 947 rpc.stdin_preamble = &preamble;
b8538603 948 rpc.gzip_request = 1;
249b2004
SP
949
950 err = rpc_service(&rpc, heads);
951 if (rpc.result.len)
cdf4fb8e 952 write_or_die(1, rpc.result.buf, rpc.result.len);
249b2004 953 strbuf_release(&rpc.result);
8150749d 954 strbuf_release(&preamble);
b5f62ebe 955 argv_array_clear(&args);
249b2004
SP
956 return err;
957}
958
959static int fetch(int nr_heads, struct ref **to_fetch)
960{
2a455202 961 struct discovery *d = discover_refs("git-upload-pack", 0);
249b2004
SP
962 if (d->proto_git)
963 return fetch_git(d, nr_heads, to_fetch);
964 else
965 return fetch_dumb(nr_heads, to_fetch);
966}
967
292ce46b
SP
968static void parse_fetch(struct strbuf *buf)
969{
970 struct ref **to_fetch = NULL;
971 struct ref *list_head = NULL;
972 struct ref **list = &list_head;
973 int alloc_heads = 0, nr_heads = 0;
974
975 do {
95b567c7
JK
976 const char *p;
977 if (skip_prefix(buf->buf, "fetch ", &p)) {
978 const char *name;
292ce46b 979 struct ref *ref;
8338c911 980 struct object_id old_oid;
292ce46b 981
8338c911 982 if (get_oid_hex(p, &old_oid))
292ce46b 983 die("protocol error: expected sha/ref, got %s'", p);
8338c911 984 if (p[GIT_SHA1_HEXSZ] == ' ')
985 name = p + GIT_SHA1_HEXSZ + 1;
986 else if (!p[GIT_SHA1_HEXSZ])
292ce46b
SP
987 name = "";
988 else
989 die("protocol error: expected sha/ref, got %s'", p);
990
991 ref = alloc_ref(name);
8338c911 992 oidcpy(&ref->old_oid, &old_oid);
292ce46b
SP
993
994 *list = ref;
995 list = &ref->next;
996
997 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
998 to_fetch[nr_heads++] = ref;
999 }
1000 else
1001 die("http transport does not support %s", buf->buf);
1002
1003 strbuf_reset(buf);
8f309aeb 1004 if (strbuf_getline_lf(buf, stdin) == EOF)
292ce46b
SP
1005 return;
1006 if (!*buf->buf)
1007 break;
1008 } while (1);
1009
249b2004 1010 if (fetch(nr_heads, to_fetch))
292ce46b
SP
1011 exit(128); /* error already reported */
1012 free_refs(list_head);
1013 free(to_fetch);
1014
1015 printf("\n");
1016 fflush(stdout);
1017 strbuf_reset(buf);
1018}
1019
ae4efe19
SP
1020static int push_dav(int nr_spec, char **specs)
1021{
850d2fec
JK
1022 struct child_process child = CHILD_PROCESS_INIT;
1023 size_t i;
ae4efe19 1024
850d2fec
JK
1025 child.git_cmd = 1;
1026 argv_array_push(&child.args, "http-push");
1027 argv_array_push(&child.args, "--helper-status");
ae4efe19 1028 if (options.dry_run)
850d2fec 1029 argv_array_push(&child.args, "--dry-run");
ae4efe19 1030 if (options.verbosity > 1)
850d2fec
JK
1031 argv_array_push(&child.args, "--verbose");
1032 argv_array_push(&child.args, url.buf);
ae4efe19 1033 for (i = 0; i < nr_spec; i++)
850d2fec 1034 argv_array_push(&child.args, specs[i]);
ae4efe19 1035
850d2fec
JK
1036 if (run_command(&child))
1037 die("git-http-push failed");
ae4efe19
SP
1038 return 0;
1039}
1040
de1a2fdd
SP
1041static int push_git(struct discovery *heads, int nr_spec, char **specs)
1042{
1043 struct rpc_state rpc;
222b1212
JH
1044 int i, err;
1045 struct argv_array args;
05c1eb10 1046 struct string_list_item *cas_option;
26be19ba 1047 struct strbuf preamble = STRBUF_INIT;
222b1212
JH
1048
1049 argv_array_init(&args);
1050 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1051 NULL);
de1a2fdd 1052
de1a2fdd 1053 if (options.thin)
222b1212 1054 argv_array_push(&args, "--thin");
de1a2fdd 1055 if (options.dry_run)
222b1212 1056 argv_array_push(&args, "--dry-run");
30261094
DB
1057 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1058 argv_array_push(&args, "--signed=yes");
1059 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1060 argv_array_push(&args, "--signed=if-asked");
c207e34f 1061 if (options.verbosity == 0)
222b1212 1062 argv_array_push(&args, "--quiet");
c207e34f 1063 else if (options.verbosity > 1)
222b1212 1064 argv_array_push(&args, "--verbose");
511155db
BW
1065 for (i = 0; i < options.push_options.nr; i++)
1066 argv_array_pushf(&args, "--push-option=%s",
1067 options.push_options.items[i].string);
222b1212 1068 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
05c1eb10 1069 for_each_string_list_item(cas_option, &cas_options)
2233ad45 1070 argv_array_push(&args, cas_option->string);
b227bbc4 1071 argv_array_push(&args, url.buf);
26be19ba
JK
1072
1073 argv_array_push(&args, "--stdin");
de1a2fdd 1074 for (i = 0; i < nr_spec; i++)
26be19ba
JK
1075 packet_buf_write(&preamble, "%s\n", specs[i]);
1076 packet_buf_flush(&preamble);
de1a2fdd
SP
1077
1078 memset(&rpc, 0, sizeof(rpc));
1079 rpc.service_name = "git-receive-pack",
222b1212 1080 rpc.argv = args.argv;
26be19ba 1081 rpc.stdin_preamble = &preamble;
de1a2fdd
SP
1082
1083 err = rpc_service(&rpc, heads);
1084 if (rpc.result.len)
cdf4fb8e 1085 write_or_die(1, rpc.result.buf, rpc.result.len);
de1a2fdd 1086 strbuf_release(&rpc.result);
26be19ba 1087 strbuf_release(&preamble);
222b1212 1088 argv_array_clear(&args);
de1a2fdd
SP
1089 return err;
1090}
1091
1092static int push(int nr_spec, char **specs)
1093{
2a455202 1094 struct discovery *heads = discover_refs("git-receive-pack", 1);
de1a2fdd
SP
1095 int ret;
1096
1097 if (heads->proto_git)
1098 ret = push_git(heads, nr_spec, specs);
1099 else
1100 ret = push_dav(nr_spec, specs);
1101 free_discovery(heads);
1102 return ret;
1103}
1104
ae4efe19
SP
1105static void parse_push(struct strbuf *buf)
1106{
1107 char **specs = NULL;
5238cbf6 1108 int alloc_spec = 0, nr_spec = 0, i, ret;
ae4efe19
SP
1109
1110 do {
59556548 1111 if (starts_with(buf->buf, "push ")) {
ae4efe19
SP
1112 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1113 specs[nr_spec++] = xstrdup(buf->buf + 5);
1114 }
1115 else
1116 die("http transport does not support %s", buf->buf);
1117
1118 strbuf_reset(buf);
8f309aeb 1119 if (strbuf_getline_lf(buf, stdin) == EOF)
dc4cd767 1120 goto free_specs;
ae4efe19
SP
1121 if (!*buf->buf)
1122 break;
1123 } while (1);
1124
5238cbf6 1125 ret = push(nr_spec, specs);
ae4efe19
SP
1126 printf("\n");
1127 fflush(stdout);
dc4cd767 1128
5238cbf6
SP
1129 if (ret)
1130 exit(128); /* error already reported */
1131
dc4cd767
JM
1132 free_specs:
1133 for (i = 0; i < nr_spec; i++)
1134 free(specs[i]);
1135 free(specs);
ae4efe19
SP
1136}
1137
0f1dc53f
BW
1138/*
1139 * Used to represent the state of a connection to an HTTP server when
1140 * communicating using git's wire-protocol version 2.
1141 */
1142struct proxy_state {
1143 char *service_name;
1144 char *service_url;
1145 struct curl_slist *headers;
1146 struct strbuf request_buffer;
1147 int in;
1148 int out;
1149 struct packet_reader reader;
1150 size_t pos;
1151 int seen_flush;
1152};
1153
1154static void proxy_state_init(struct proxy_state *p, const char *service_name,
1155 enum protocol_version version)
1156{
1157 struct strbuf buf = STRBUF_INIT;
1158
1159 memset(p, 0, sizeof(*p));
1160 p->service_name = xstrdup(service_name);
1161
1162 p->in = 0;
1163 p->out = 1;
1164 strbuf_init(&p->request_buffer, 0);
1165
1166 strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1167 p->service_url = strbuf_detach(&buf, NULL);
1168
1169 p->headers = http_copy_default_headers();
1170
1171 strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1172 p->headers = curl_slist_append(p->headers, buf.buf);
1173 strbuf_reset(&buf);
1174
1175 strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1176 p->headers = curl_slist_append(p->headers, buf.buf);
1177 strbuf_reset(&buf);
1178
1179 p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1180
1181 /* Add the Git-Protocol header */
1182 if (get_protocol_http_header(version, &buf))
1183 p->headers = curl_slist_append(p->headers, buf.buf);
1184
1185 packet_reader_init(&p->reader, p->in, NULL, 0,
1186 PACKET_READ_GENTLE_ON_EOF);
1187
1188 strbuf_release(&buf);
1189}
1190
1191static void proxy_state_clear(struct proxy_state *p)
1192{
1193 free(p->service_name);
1194 free(p->service_url);
1195 curl_slist_free_all(p->headers);
1196 strbuf_release(&p->request_buffer);
1197}
1198
1199/*
1200 * CURLOPT_READFUNCTION callback function.
1201 * Attempts to copy over a single packet-line at a time into the
1202 * curl provided buffer.
1203 */
1204static size_t proxy_in(char *buffer, size_t eltsize,
1205 size_t nmemb, void *userdata)
1206{
1207 size_t max;
1208 struct proxy_state *p = userdata;
1209 size_t avail = p->request_buffer.len - p->pos;
1210
1211
1212 if (eltsize != 1)
1213 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1214 (uintmax_t)eltsize);
1215 max = nmemb;
1216
1217 if (!avail) {
1218 if (p->seen_flush) {
1219 p->seen_flush = 0;
1220 return 0;
1221 }
1222
1223 strbuf_reset(&p->request_buffer);
1224 switch (packet_reader_read(&p->reader)) {
1225 case PACKET_READ_EOF:
1226 die("unexpected EOF when reading from parent process");
1227 case PACKET_READ_NORMAL:
1228 packet_buf_write_len(&p->request_buffer, p->reader.line,
1229 p->reader.pktlen);
1230 break;
1231 case PACKET_READ_DELIM:
1232 packet_buf_delim(&p->request_buffer);
1233 break;
1234 case PACKET_READ_FLUSH:
1235 packet_buf_flush(&p->request_buffer);
1236 p->seen_flush = 1;
1237 break;
1238 }
1239 p->pos = 0;
1240 avail = p->request_buffer.len;
1241 }
1242
1243 if (max < avail)
1244 avail = max;
1245 memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1246 p->pos += avail;
1247 return avail;
1248}
1249
1250static size_t proxy_out(char *buffer, size_t eltsize,
1251 size_t nmemb, void *userdata)
1252{
1253 size_t size;
1254 struct proxy_state *p = userdata;
1255
1256 if (eltsize != 1)
1257 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1258 (uintmax_t)eltsize);
1259 size = nmemb;
1260
1261 write_or_die(p->out, buffer, size);
1262 return size;
1263}
1264
1265/* Issues a request to the HTTP server configured in `p` */
1266static int proxy_request(struct proxy_state *p)
1267{
1268 struct active_request_slot *slot;
1269
1270 slot = get_active_slot();
1271
eaf6a1b6 1272 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
0f1dc53f
BW
1273 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1274 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1275 curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1276 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1277
1278 /* Setup function to read request from client */
1279 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1280 curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1281
1282 /* Setup function to write server response to client */
1283 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1284 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1285
1286 if (run_slot(slot, NULL) != HTTP_OK)
1287 return -1;
1288
1289 return 0;
1290}
1291
1292static int stateless_connect(const char *service_name)
1293{
1294 struct discovery *discover;
1295 struct proxy_state p;
1296
1297 /*
1298 * Run the info/refs request and see if the server supports protocol
1299 * v2. If and only if the server supports v2 can we successfully
1300 * establish a stateless connection, otherwise we need to tell the
1301 * client to fallback to using other transport helper functions to
1302 * complete their request.
1303 */
1304 discover = discover_refs(service_name, 0);
1305 if (discover->version != protocol_v2) {
1306 printf("fallback\n");
1307 fflush(stdout);
1308 return -1;
1309 } else {
1310 /* Stateless Connection established */
1311 printf("\n");
1312 fflush(stdout);
1313 }
1314
1315 proxy_state_init(&p, service_name, discover->version);
1316
1317 /*
1318 * Dump the capability listing that we got from the server earlier
1319 * during the info/refs request.
1320 */
1321 write_or_die(p.out, discover->buf, discover->len);
1322
1323 /* Peek the next packet line. Until we see EOF keep sending POSTs */
1324 while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1325 if (proxy_request(&p)) {
1326 /* We would have an err here */
1327 break;
1328 }
1329 }
1330
1331 proxy_state_clear(&p);
1332 return 0;
1333}
1334
3f2e2297 1335int cmd_main(int argc, const char **argv)
a2d725b7 1336{
a2d725b7 1337 struct strbuf buf = STRBUF_INIT;
a45d3d7e 1338 int nongit;
a2d725b7 1339
a45d3d7e 1340 setup_git_directory_gently(&nongit);
a2d725b7 1341 if (argc < 2) {
cdaa4e98 1342 error("remote-curl: usage: git remote-curl <remote> [<url>]");
a2d725b7
DB
1343 return 1;
1344 }
1345
ef08ef9e
SP
1346 options.verbosity = 1;
1347 options.progress = !!isatty(2);
de1a2fdd 1348 options.thin = 1;
a45a2600 1349 string_list_init(&options.deepen_not, 1);
511155db 1350 string_list_init(&options.push_options, 1);
ef08ef9e 1351
a2d725b7
DB
1352 remote = remote_get(argv[1]);
1353
1354 if (argc > 2) {
b227bbc4 1355 end_url_with_slash(&url, argv[2]);
a2d725b7 1356 } else {
b227bbc4 1357 end_url_with_slash(&url, remote->url[0]);
a2d725b7
DB
1358 }
1359
b227bbc4 1360 http_init(remote, url.buf, 0);
888692b7 1361
a2d725b7 1362 do {
95b567c7
JK
1363 const char *arg;
1364
8f309aeb 1365 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1843f0ce 1366 if (ferror(stdin))
cdaa4e98 1367 error("remote-curl: error reading command stream from git");
1843f0ce
SR
1368 return 1;
1369 }
1370 if (buf.len == 0)
a2d725b7 1371 break;
59556548 1372 if (starts_with(buf.buf, "fetch ")) {
a45d3d7e 1373 if (nongit)
cdaa4e98 1374 die("remote-curl: fetch attempted without a local repo");
292ce46b
SP
1375 parse_fetch(&buf);
1376
59556548 1377 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
97cc7bc4
SP
1378 int for_push = !!strstr(buf.buf + 4, "for-push");
1379 output_refs(get_refs(for_push));
ae4efe19 1380
59556548 1381 } else if (starts_with(buf.buf, "push ")) {
ae4efe19
SP
1382 parse_push(&buf);
1383
95b567c7
JK
1384 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1385 char *value = strchr(arg, ' ');
ef08ef9e
SP
1386 int result;
1387
1388 if (value)
1389 *value++ = '\0';
1390 else
1391 value = "true";
1392
95b567c7 1393 result = set_option(arg, value);
ef08ef9e
SP
1394 if (!result)
1395 printf("ok\n");
1396 else if (result < 0)
1397 printf("error invalid value\n");
1398 else
1399 printf("unsupported\n");
a2d725b7 1400 fflush(stdout);
ef08ef9e 1401
a2d725b7 1402 } else if (!strcmp(buf.buf, "capabilities")) {
0f1dc53f 1403 printf("stateless-connect\n");
a2d725b7 1404 printf("fetch\n");
ef08ef9e 1405 printf("option\n");
ae4efe19 1406 printf("push\n");
9ba38048 1407 printf("check-connectivity\n");
a2d725b7
DB
1408 printf("\n");
1409 fflush(stdout);
0f1dc53f
BW
1410 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1411 if (!stateless_connect(arg))
1412 break;
a2d725b7 1413 } else {
cdaa4e98 1414 error("remote-curl: unknown command '%s' from git", buf.buf);
a2d725b7
DB
1415 return 1;
1416 }
1417 strbuf_reset(&buf);
1418 } while (1);
888692b7
TRC
1419
1420 http_cleanup();
1421
a2d725b7
DB
1422 return 0;
1423}