strbuf: add strbuf_reencode helper
[git/git.git] / remote-curl.c
CommitLineData
a2d725b7
DB
1#include "cache.h"
2#include "remote.h"
3#include "strbuf.h"
4#include "walker.h"
5#include "http.h"
d01a8e32 6#include "exec_cmd.h"
ae4efe19 7#include "run-command.h"
97cc7bc4 8#include "pkt-line.h"
05c1eb10 9#include "string-list.h"
de1a2fdd 10#include "sideband.h"
222b1212 11#include "argv-array.h"
2501aff8 12#include "credential.h"
16094885 13#include "sha1-array.h"
a2d725b7 14
37a8768f 15static struct remote *remote;
b227bbc4
JK
16/* always ends with a trailing slash */
17static struct strbuf url = STRBUF_INIT;
37a8768f 18
ef08ef9e
SP
19struct options {
20 int verbosity;
21 unsigned long depth;
22 unsigned progress : 1,
9ba38048 23 check_self_contained_and_connected : 1,
16094885
NTND
24 cloning : 1,
25 update_shallow : 1,
ae4efe19 26 followtags : 1,
de1a2fdd
SP
27 dry_run : 1,
28 thin : 1;
ef08ef9e
SP
29};
30static struct options options;
05c1eb10 31static struct string_list cas_options = STRING_LIST_INIT_DUP;
ef08ef9e 32
ef08ef9e
SP
33static int set_option(const char *name, const char *value)
34{
35 if (!strcmp(name, "verbosity")) {
36 char *end;
37 int v = strtol(value, &end, 10);
38 if (value == end || *end)
39 return -1;
40 options.verbosity = v;
41 return 0;
42 }
43 else if (!strcmp(name, "progress")) {
44 if (!strcmp(value, "true"))
45 options.progress = 1;
46 else if (!strcmp(value, "false"))
47 options.progress = 0;
48 else
49 return -1;
249b2004 50 return 0;
ef08ef9e
SP
51 }
52 else if (!strcmp(name, "depth")) {
53 char *end;
54 unsigned long v = strtoul(value, &end, 10);
55 if (value == end || *end)
56 return -1;
57 options.depth = v;
249b2004 58 return 0;
ef08ef9e
SP
59 }
60 else if (!strcmp(name, "followtags")) {
61 if (!strcmp(value, "true"))
62 options.followtags = 1;
63 else if (!strcmp(value, "false"))
64 options.followtags = 0;
65 else
66 return -1;
249b2004 67 return 0;
ef08ef9e 68 }
ae4efe19
SP
69 else if (!strcmp(name, "dry-run")) {
70 if (!strcmp(value, "true"))
71 options.dry_run = 1;
72 else if (!strcmp(value, "false"))
73 options.dry_run = 0;
74 else
75 return -1;
76 return 0;
77 }
9ba38048
NTND
78 else if (!strcmp(name, "check-connectivity")) {
79 if (!strcmp(value, "true"))
80 options.check_self_contained_and_connected = 1;
81 else if (!strcmp(value, "false"))
82 options.check_self_contained_and_connected = 0;
83 else
84 return -1;
85 return 0;
86 }
05c1eb10
JH
87 else if (!strcmp(name, "cas")) {
88 struct strbuf val = STRBUF_INIT;
89 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
90 string_list_append(&cas_options, val.buf);
91 strbuf_release(&val);
92 return 0;
16094885
NTND
93 } else if (!strcmp(name, "cloning")) {
94 if (!strcmp(value, "true"))
95 options.cloning = 1;
96 else if (!strcmp(value, "false"))
97 options.cloning = 0;
98 else
99 return -1;
100 return 0;
101 } else if (!strcmp(name, "update-shallow")) {
102 if (!strcmp(value, "true"))
103 options.update_shallow = 1;
104 else if (!strcmp(value, "false"))
105 options.update_shallow = 0;
106 else
107 return -1;
108 return 0;
109 } else {
ef08ef9e
SP
110 return 1 /* unsupported */;
111 }
112}
113
97cc7bc4
SP
114struct discovery {
115 const char *service;
116 char *buf_alloc;
117 char *buf;
118 size_t len;
2a455202 119 struct ref *refs;
16094885 120 struct sha1_array shallow;
97cc7bc4
SP
121 unsigned proto_git : 1;
122};
123static struct discovery *last_discovery;
124
b8054bbe
JK
125static struct ref *parse_git_refs(struct discovery *heads, int for_push)
126{
127 struct ref *list = NULL;
128 get_remote_heads(-1, heads->buf, heads->len, &list,
16094885 129 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
b8054bbe
JK
130 return list;
131}
132
133static struct ref *parse_info_refs(struct discovery *heads)
134{
135 char *data, *start, *mid;
136 char *ref_name;
137 int i = 0;
138
139 struct ref *refs = NULL;
140 struct ref *ref = NULL;
141 struct ref *last_ref = NULL;
142
143 data = heads->buf;
144 start = NULL;
145 mid = data;
146 while (i < heads->len) {
147 if (!start) {
148 start = &data[i];
149 }
150 if (data[i] == '\t')
151 mid = &data[i];
152 if (data[i] == '\n') {
153 if (mid - start != 40)
b227bbc4
JK
154 die("%sinfo/refs not valid: is this a git repository?",
155 url.buf);
b8054bbe
JK
156 data[i] = 0;
157 ref_name = mid + 1;
158 ref = xmalloc(sizeof(struct ref) +
159 strlen(ref_name) + 1);
160 memset(ref, 0, sizeof(struct ref));
161 strcpy(ref->name, ref_name);
162 get_sha1_hex(start, ref->old_sha1);
163 if (!refs)
164 refs = ref;
165 if (last_ref)
166 last_ref->next = ref;
167 last_ref = ref;
168 start = NULL;
169 }
170 i++;
171 }
172
173 ref = alloc_ref("HEAD");
b227bbc4 174 if (!http_fetch_ref(url.buf, ref) &&
b8054bbe
JK
175 !resolve_remote_symref(ref, refs)) {
176 ref->next = refs;
177 refs = ref;
178 } else {
179 free(ref);
180 }
181
182 return refs;
183}
184
97cc7bc4
SP
185static void free_discovery(struct discovery *d)
186{
187 if (d) {
188 if (d == last_discovery)
189 last_discovery = NULL;
16094885 190 free(d->shallow.sha1);
97cc7bc4 191 free(d->buf_alloc);
2a455202 192 free_refs(d->refs);
97cc7bc4
SP
193 free(d);
194 }
195}
196
426e70d4
JK
197static int show_http_message(struct strbuf *type, struct strbuf *msg)
198{
199 const char *p, *eol;
200
201 /*
202 * We only show text/plain parts, as other types are likely
203 * to be ugly to look at on the user's terminal.
204 *
205 * TODO should handle "; charset=XXX", and re-encode into
206 * logoutputencoding
207 */
bf197fd7 208 if (strcmp(type->buf, "text/plain"))
426e70d4
JK
209 return -1;
210
211 strbuf_trim(msg);
212 if (!msg->len)
213 return -1;
214
215 p = msg->buf;
216 do {
217 eol = strchrnul(p, '\n');
218 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
219 p = eol + 1;
220 } while(*eol);
221 return 0;
222}
223
2a455202 224static struct discovery* discover_refs(const char *service, int for_push)
a2d725b7 225{
4656bf47
SP
226 struct strbuf exp = STRBUF_INIT;
227 struct strbuf type = STRBUF_INIT;
a2d725b7 228 struct strbuf buffer = STRBUF_INIT;
c65d5692 229 struct strbuf refs_url = STRBUF_INIT;
050ef365 230 struct strbuf effective_url = STRBUF_INIT;
97cc7bc4 231 struct discovery *last = last_discovery;
243c329c 232 int http_ret, maybe_smart = 0;
1bbcc224 233 struct http_get_options options;
a2d725b7 234
97cc7bc4
SP
235 if (last && !strcmp(service, last->service))
236 return last;
237 free_discovery(last);
a2d725b7 238
b227bbc4 239 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
59556548 240 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
02572c2e 241 git_env_bool("GIT_SMART_HTTP", 1)) {
243c329c 242 maybe_smart = 1;
b227bbc4 243 if (!strchr(url.buf, '?'))
c65d5692 244 strbuf_addch(&refs_url, '?');
97cc7bc4 245 else
c65d5692
JK
246 strbuf_addch(&refs_url, '&');
247 strbuf_addf(&refs_url, "service=%s", service);
97cc7bc4 248 }
a2d725b7 249
1bbcc224
JK
250 memset(&options, 0, sizeof(options));
251 options.content_type = &type;
050ef365
JK
252 options.effective_url = &effective_url;
253 options.base_url = &url;
1bbcc224
JK
254 options.no_cache = 1;
255 options.keep_error = 1;
256
c65d5692 257 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
a2d725b7
DB
258 switch (http_ret) {
259 case HTTP_OK:
260 break;
261 case HTTP_MISSING_TARGET:
cfa0f404 262 show_http_message(&type, &buffer);
b227bbc4 263 die("repository '%s' not found", url.buf);
42653c09 264 case HTTP_NOAUTH:
426e70d4 265 show_http_message(&type, &buffer);
b227bbc4 266 die("Authentication failed for '%s'", url.buf);
a2d725b7 267 default:
426e70d4 268 show_http_message(&type, &buffer);
b227bbc4 269 die("unable to access '%s': %s", url.buf, curl_errorstr);
a2d725b7
DB
270 }
271
97cc7bc4
SP
272 last= xcalloc(1, sizeof(*last_discovery));
273 last->service = service;
274 last->buf_alloc = strbuf_detach(&buffer, &last->len);
275 last->buf = last->buf_alloc;
276
4656bf47
SP
277 strbuf_addf(&exp, "application/x-%s-advertisement", service);
278 if (maybe_smart &&
279 (5 <= last->len && last->buf[4] == '#') &&
280 !strbuf_cmp(&exp, &type)) {
4981fe75
JK
281 char *line;
282
4656bf47
SP
283 /*
284 * smart HTTP response; validate that the service
97cc7bc4
SP
285 * pkt-line matches our request.
286 */
4981fe75 287 line = packet_read_line_buf(&last->buf, &last->len, NULL);
97cc7bc4 288
4656bf47 289 strbuf_reset(&exp);
97cc7bc4 290 strbuf_addf(&exp, "# service=%s", service);
4981fe75
JK
291 if (strcmp(line, exp.buf))
292 die("invalid server response; got '%s'", line);
97cc7bc4
SP
293 strbuf_release(&exp);
294
295 /* The header can include additional metadata lines, up
296 * until a packet flush marker. Ignore these now, but
297 * in the future we might start to scan them.
298 */
4981fe75
JK
299 while (packet_read_line_buf(&last->buf, &last->len, NULL))
300 ;
97cc7bc4
SP
301
302 last->proto_git = 1;
303 }
304
2a455202
JK
305 if (last->proto_git)
306 last->refs = parse_git_refs(last, for_push);
307 else
308 last->refs = parse_info_refs(last);
309
c65d5692 310 strbuf_release(&refs_url);
4656bf47
SP
311 strbuf_release(&exp);
312 strbuf_release(&type);
050ef365 313 strbuf_release(&effective_url);
97cc7bc4
SP
314 strbuf_release(&buffer);
315 last_discovery = last;
316 return last;
317}
318
97cc7bc4
SP
319static struct ref *get_refs(int for_push)
320{
321 struct discovery *heads;
322
323 if (for_push)
2a455202 324 heads = discover_refs("git-receive-pack", for_push);
97cc7bc4 325 else
2a455202 326 heads = discover_refs("git-upload-pack", for_push);
97cc7bc4 327
2a455202 328 return heads->refs;
97cc7bc4
SP
329}
330
ae4efe19
SP
331static void output_refs(struct ref *refs)
332{
333 struct ref *posn;
334 for (posn = refs; posn; posn = posn->next) {
335 if (posn->symref)
336 printf("@%s %s\n", posn->symref, posn->name);
337 else
338 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
339 }
340 printf("\n");
341 fflush(stdout);
ae4efe19
SP
342}
343
de1a2fdd
SP
344struct rpc_state {
345 const char *service_name;
346 const char **argv;
8150749d 347 struct strbuf *stdin_preamble;
de1a2fdd
SP
348 char *service_url;
349 char *hdr_content_type;
350 char *hdr_accept;
351 char *buf;
352 size_t alloc;
353 size_t len;
354 size_t pos;
355 int in;
356 int out;
357 struct strbuf result;
b8538603 358 unsigned gzip_request : 1;
6c81a990 359 unsigned initial_buffer : 1;
de1a2fdd
SP
360};
361
362static size_t rpc_out(void *ptr, size_t eltsize,
363 size_t nmemb, void *buffer_)
364{
365 size_t max = eltsize * nmemb;
366 struct rpc_state *rpc = buffer_;
367 size_t avail = rpc->len - rpc->pos;
368
369 if (!avail) {
6c81a990 370 rpc->initial_buffer = 0;
4981fe75 371 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
de1a2fdd
SP
372 if (!avail)
373 return 0;
374 rpc->pos = 0;
375 rpc->len = avail;
376 }
377
48310608 378 if (max < avail)
de1a2fdd
SP
379 avail = max;
380 memcpy(ptr, rpc->buf + rpc->pos, avail);
381 rpc->pos += avail;
382 return avail;
383}
384
6c81a990 385#ifndef NO_CURL_IOCTL
5092d3ec 386static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
6c81a990
MS
387{
388 struct rpc_state *rpc = clientp;
389
390 switch (cmd) {
391 case CURLIOCMD_NOP:
392 return CURLIOE_OK;
393
394 case CURLIOCMD_RESTARTREAD:
395 if (rpc->initial_buffer) {
396 rpc->pos = 0;
397 return CURLIOE_OK;
398 }
399 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
400 return CURLIOE_FAILRESTART;
401
402 default:
403 return CURLIOE_UNKNOWNCMD;
404 }
405}
406#endif
407
a04ff3ec 408static size_t rpc_in(char *ptr, size_t eltsize,
de1a2fdd
SP
409 size_t nmemb, void *buffer_)
410{
411 size_t size = eltsize * nmemb;
412 struct rpc_state *rpc = buffer_;
413 write_or_die(rpc->in, ptr, size);
414 return size;
415}
416
3a347ed7
JK
417static int run_slot(struct active_request_slot *slot,
418 struct slot_results *results)
206b099d 419{
b81401c1 420 int err;
3a347ed7 421 struct slot_results results_buf;
206b099d 422
3a347ed7
JK
423 if (!results)
424 results = &results_buf;
425
beed336c 426 err = run_one_slot(slot, results);
206b099d 427
b81401c1
JK
428 if (err != HTTP_OK && err != HTTP_REAUTH) {
429 error("RPC failed; result=%d, HTTP code = %ld",
3a347ed7 430 results->curl_result, results->http_code);
206b099d
SP
431 }
432
433 return err;
434}
435
3a347ed7 436static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
206b099d
SP
437{
438 struct active_request_slot *slot;
439 struct curl_slist *headers = NULL;
440 struct strbuf buf = STRBUF_INIT;
441 int err;
442
443 slot = get_active_slot();
444
445 headers = curl_slist_append(headers, rpc->hdr_content_type);
446 headers = curl_slist_append(headers, rpc->hdr_accept);
447
448 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
449 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
450 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
aa90b969 451 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
206b099d
SP
452 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
453 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
454 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
455 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
456 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
457
3a347ed7 458 err = run_slot(slot, results);
206b099d
SP
459
460 curl_slist_free_all(headers);
461 strbuf_release(&buf);
462 return err;
463}
464
de1a2fdd
SP
465static int post_rpc(struct rpc_state *rpc)
466{
467 struct active_request_slot *slot;
de1a2fdd 468 struct curl_slist *headers = NULL;
b8538603
SP
469 int use_gzip = rpc->gzip_request;
470 char *gzip_body = NULL;
37711549 471 size_t gzip_size = 0;
206b099d 472 int err, large_request = 0;
c80d96ca 473 int needs_100_continue = 0;
de1a2fdd
SP
474
475 /* Try to load the entire request, if we can fit it into the
476 * allocated buffer space we can use HTTP/1.0 and avoid the
477 * chunked encoding mess.
478 */
479 while (1) {
480 size_t left = rpc->alloc - rpc->len;
481 char *buf = rpc->buf + rpc->len;
482 int n;
483
484 if (left < LARGE_PACKET_MAX) {
485 large_request = 1;
b8538603 486 use_gzip = 0;
de1a2fdd
SP
487 break;
488 }
489
4981fe75 490 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
de1a2fdd
SP
491 if (!n)
492 break;
493 rpc->len += n;
494 }
495
206b099d 496 if (large_request) {
c80d96ca 497 struct slot_results results;
498
b81401c1 499 do {
c80d96ca 500 err = probe_rpc(rpc, &results);
2501aff8
JK
501 if (err == HTTP_REAUTH)
502 credential_fill(&http_auth);
b81401c1
JK
503 } while (err == HTTP_REAUTH);
504 if (err != HTTP_OK)
505 return -1;
c80d96ca 506
507 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
508 needs_100_continue = 1;
206b099d
SP
509 }
510
abf8df86
JK
511 headers = curl_slist_append(headers, rpc->hdr_content_type);
512 headers = curl_slist_append(headers, rpc->hdr_accept);
c80d96ca 513 headers = curl_slist_append(headers, needs_100_continue ?
514 "Expect: 100-continue" : "Expect:");
abf8df86
JK
515
516retry:
de1a2fdd 517 slot = get_active_slot();
de1a2fdd 518
de1a2fdd 519 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
d21f9794 520 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
de1a2fdd 521 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
aa90b969 522 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
de1a2fdd 523
de1a2fdd
SP
524 if (large_request) {
525 /* The request body is large and the size cannot be predicted.
526 * We must use chunked encoding to send it.
527 */
de1a2fdd 528 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
6c81a990 529 rpc->initial_buffer = 1;
de1a2fdd
SP
530 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
531 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
6c81a990
MS
532#ifndef NO_CURL_IOCTL
533 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
534 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
535#endif
de1a2fdd
SP
536 if (options.verbosity > 1) {
537 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
538 fflush(stderr);
539 }
540
2e736fd5
JK
541 } else if (gzip_body) {
542 /*
543 * If we are looping to retry authentication, then the previous
544 * run will have set up the headers and gzip buffer already,
545 * and we just need to send it.
546 */
547 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
548 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
549
b8538603
SP
550 } else if (use_gzip && 1024 < rpc->len) {
551 /* The client backend isn't giving us compressed data so
552 * we can try to deflate it ourselves, this may save on.
553 * the transfer time.
554 */
ef49a7a0 555 git_zstream stream;
b8538603
SP
556 int ret;
557
558 memset(&stream, 0, sizeof(stream));
55bb5c91 559 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
df126e10
JK
560 gzip_size = git_deflate_bound(&stream, rpc->len);
561 gzip_body = xmalloc(gzip_size);
b8538603
SP
562
563 stream.next_in = (unsigned char *)rpc->buf;
564 stream.avail_in = rpc->len;
565 stream.next_out = (unsigned char *)gzip_body;
df126e10 566 stream.avail_out = gzip_size;
b8538603 567
55bb5c91 568 ret = git_deflate(&stream, Z_FINISH);
b8538603
SP
569 if (ret != Z_STREAM_END)
570 die("cannot deflate request; zlib deflate error %d", ret);
571
55bb5c91 572 ret = git_deflate_end_gently(&stream);
b8538603
SP
573 if (ret != Z_OK)
574 die("cannot deflate request; zlib end error %d", ret);
575
df126e10 576 gzip_size = stream.total_out;
b8538603
SP
577
578 headers = curl_slist_append(headers, "Content-Encoding: gzip");
579 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
df126e10 580 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
b8538603
SP
581
582 if (options.verbosity > 1) {
583 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
584 rpc->service_name,
df126e10 585 (unsigned long)rpc->len, (unsigned long)gzip_size);
b8538603
SP
586 fflush(stderr);
587 }
de1a2fdd
SP
588 } else {
589 /* We know the complete request size in advance, use the
590 * more normal Content-Length approach.
591 */
592 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
593 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
594 if (options.verbosity > 1) {
595 fprintf(stderr, "POST %s (%lu bytes)\n",
596 rpc->service_name, (unsigned long)rpc->len);
597 fflush(stderr);
598 }
599 }
600
601 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
602 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
603 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
604
3a347ed7 605 err = run_slot(slot, NULL);
2501aff8
JK
606 if (err == HTTP_REAUTH && !large_request) {
607 credential_fill(&http_auth);
abf8df86 608 goto retry;
2501aff8 609 }
b81401c1
JK
610 if (err != HTTP_OK)
611 err = -1;
de1a2fdd
SP
612
613 curl_slist_free_all(headers);
b8538603 614 free(gzip_body);
de1a2fdd
SP
615 return err;
616}
617
618static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
619{
620 const char *svc = rpc->service_name;
621 struct strbuf buf = STRBUF_INIT;
8150749d 622 struct strbuf *preamble = rpc->stdin_preamble;
de1a2fdd
SP
623 struct child_process client;
624 int err = 0;
625
de1a2fdd
SP
626 memset(&client, 0, sizeof(client));
627 client.in = -1;
628 client.out = -1;
629 client.git_cmd = 1;
630 client.argv = rpc->argv;
631 if (start_command(&client))
632 exit(1);
8150749d
IT
633 if (preamble)
634 write_or_die(client.in, preamble->buf, preamble->len);
de1a2fdd
SP
635 if (heads)
636 write_or_die(client.in, heads->buf, heads->len);
637
638 rpc->alloc = http_post_buffer;
639 rpc->buf = xmalloc(rpc->alloc);
640 rpc->in = client.in;
641 rpc->out = client.out;
642 strbuf_init(&rpc->result, 0);
643
b227bbc4 644 strbuf_addf(&buf, "%s%s", url.buf, svc);
de1a2fdd
SP
645 rpc->service_url = strbuf_detach(&buf, NULL);
646
647 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
648 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
649
8efa5f62 650 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
de1a2fdd
SP
651 rpc->hdr_accept = strbuf_detach(&buf, NULL);
652
653 while (!err) {
4981fe75 654 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
de1a2fdd
SP
655 if (!n)
656 break;
657 rpc->pos = 0;
658 rpc->len = n;
659 err |= post_rpc(rpc);
660 }
de1a2fdd
SP
661
662 close(client.in);
de1a2fdd 663 client.in = -1;
6cdf0223
SP
664 if (!err) {
665 strbuf_read(&rpc->result, client.out, 0);
666 } else {
667 char buf[4096];
668 for (;;)
669 if (xread(client.out, buf, sizeof(buf)) <= 0)
670 break;
671 }
b4ee10f6
SP
672
673 close(client.out);
de1a2fdd
SP
674 client.out = -1;
675
676 err |= finish_command(&client);
677 free(rpc->service_url);
678 free(rpc->hdr_content_type);
679 free(rpc->hdr_accept);
680 free(rpc->buf);
681 strbuf_release(&buf);
682 return err;
683}
684
292ce46b
SP
685static int fetch_dumb(int nr_heads, struct ref **to_fetch)
686{
26e1e0b2 687 struct walker *walker;
292ce46b
SP
688 char **targets = xmalloc(nr_heads * sizeof(char*));
689 int ret, i;
690
249b2004
SP
691 if (options.depth)
692 die("dumb http transport does not support --depth");
292ce46b
SP
693 for (i = 0; i < nr_heads; i++)
694 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
695
b227bbc4 696 walker = get_http_walker(url.buf);
292ce46b
SP
697 walker->get_all = 1;
698 walker->get_tree = 1;
699 walker->get_history = 1;
ef08ef9e 700 walker->get_verbosely = options.verbosity >= 3;
292ce46b
SP
701 walker->get_recover = 0;
702 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
26e1e0b2 703 walker_free(walker);
292ce46b
SP
704
705 for (i = 0; i < nr_heads; i++)
706 free(targets[i]);
707 free(targets);
708
709 return ret ? error("Fetch failed.") : 0;
710}
711
249b2004
SP
712static int fetch_git(struct discovery *heads,
713 int nr_heads, struct ref **to_fetch)
714{
715 struct rpc_state rpc;
8150749d 716 struct strbuf preamble = STRBUF_INIT;
249b2004 717 char *depth_arg = NULL;
249b2004 718 int argc = 0, i, err;
16094885 719 const char *argv[17];
249b2004 720
249b2004
SP
721 argv[argc++] = "fetch-pack";
722 argv[argc++] = "--stateless-rpc";
8150749d 723 argv[argc++] = "--stdin";
249b2004
SP
724 argv[argc++] = "--lock-pack";
725 if (options.followtags)
726 argv[argc++] = "--include-tag";
727 if (options.thin)
728 argv[argc++] = "--thin";
729 if (options.verbosity >= 3) {
730 argv[argc++] = "-v";
731 argv[argc++] = "-v";
732 }
9ba38048
NTND
733 if (options.check_self_contained_and_connected)
734 argv[argc++] = "--check-self-contained-and-connected";
16094885
NTND
735 if (options.cloning)
736 argv[argc++] = "--cloning";
737 if (options.update_shallow)
738 argv[argc++] = "--update-shallow";
249b2004
SP
739 if (!options.progress)
740 argv[argc++] = "--no-progress";
741 if (options.depth) {
742 struct strbuf buf = STRBUF_INIT;
743 strbuf_addf(&buf, "--depth=%lu", options.depth);
744 depth_arg = strbuf_detach(&buf, NULL);
745 argv[argc++] = depth_arg;
746 }
b227bbc4 747 argv[argc++] = url.buf;
8150749d
IT
748 argv[argc++] = NULL;
749
249b2004
SP
750 for (i = 0; i < nr_heads; i++) {
751 struct ref *ref = to_fetch[i];
752 if (!ref->name || !*ref->name)
753 die("cannot fetch by sha1 over smart http");
58f2ed05
NTND
754 packet_buf_write(&preamble, "%s %s\n",
755 sha1_to_hex(ref->old_sha1), ref->name);
249b2004 756 }
8150749d 757 packet_buf_flush(&preamble);
249b2004
SP
758
759 memset(&rpc, 0, sizeof(rpc));
760 rpc.service_name = "git-upload-pack",
761 rpc.argv = argv;
8150749d 762 rpc.stdin_preamble = &preamble;
b8538603 763 rpc.gzip_request = 1;
249b2004
SP
764
765 err = rpc_service(&rpc, heads);
766 if (rpc.result.len)
cdf4fb8e 767 write_or_die(1, rpc.result.buf, rpc.result.len);
249b2004 768 strbuf_release(&rpc.result);
8150749d 769 strbuf_release(&preamble);
249b2004
SP
770 free(depth_arg);
771 return err;
772}
773
774static int fetch(int nr_heads, struct ref **to_fetch)
775{
2a455202 776 struct discovery *d = discover_refs("git-upload-pack", 0);
249b2004
SP
777 if (d->proto_git)
778 return fetch_git(d, nr_heads, to_fetch);
779 else
780 return fetch_dumb(nr_heads, to_fetch);
781}
782
292ce46b
SP
783static void parse_fetch(struct strbuf *buf)
784{
785 struct ref **to_fetch = NULL;
786 struct ref *list_head = NULL;
787 struct ref **list = &list_head;
788 int alloc_heads = 0, nr_heads = 0;
789
790 do {
59556548 791 if (starts_with(buf->buf, "fetch ")) {
292ce46b
SP
792 char *p = buf->buf + strlen("fetch ");
793 char *name;
794 struct ref *ref;
795 unsigned char old_sha1[20];
796
797 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
798 die("protocol error: expected sha/ref, got %s'", p);
799 if (p[40] == ' ')
800 name = p + 41;
801 else if (!p[40])
802 name = "";
803 else
804 die("protocol error: expected sha/ref, got %s'", p);
805
806 ref = alloc_ref(name);
807 hashcpy(ref->old_sha1, old_sha1);
808
809 *list = ref;
810 list = &ref->next;
811
812 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
813 to_fetch[nr_heads++] = ref;
814 }
815 else
816 die("http transport does not support %s", buf->buf);
817
818 strbuf_reset(buf);
819 if (strbuf_getline(buf, stdin, '\n') == EOF)
820 return;
821 if (!*buf->buf)
822 break;
823 } while (1);
824
249b2004 825 if (fetch(nr_heads, to_fetch))
292ce46b
SP
826 exit(128); /* error already reported */
827 free_refs(list_head);
828 free(to_fetch);
829
830 printf("\n");
831 fflush(stdout);
832 strbuf_reset(buf);
833}
834
ae4efe19
SP
835static int push_dav(int nr_spec, char **specs)
836{
837 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
838 int argc = 0, i;
839
840 argv[argc++] = "http-push";
841 argv[argc++] = "--helper-status";
842 if (options.dry_run)
843 argv[argc++] = "--dry-run";
844 if (options.verbosity > 1)
845 argv[argc++] = "--verbose";
b227bbc4 846 argv[argc++] = url.buf;
ae4efe19
SP
847 for (i = 0; i < nr_spec; i++)
848 argv[argc++] = specs[i];
849 argv[argc++] = NULL;
850
851 if (run_command_v_opt(argv, RUN_GIT_CMD))
852 die("git-%s failed", argv[0]);
853 free(argv);
854 return 0;
855}
856
de1a2fdd
SP
857static int push_git(struct discovery *heads, int nr_spec, char **specs)
858{
859 struct rpc_state rpc;
222b1212
JH
860 int i, err;
861 struct argv_array args;
05c1eb10 862 struct string_list_item *cas_option;
222b1212
JH
863
864 argv_array_init(&args);
865 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
866 NULL);
de1a2fdd 867
de1a2fdd 868 if (options.thin)
222b1212 869 argv_array_push(&args, "--thin");
de1a2fdd 870 if (options.dry_run)
222b1212 871 argv_array_push(&args, "--dry-run");
c207e34f 872 if (options.verbosity == 0)
222b1212 873 argv_array_push(&args, "--quiet");
c207e34f 874 else if (options.verbosity > 1)
222b1212
JH
875 argv_array_push(&args, "--verbose");
876 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
05c1eb10 877 for_each_string_list_item(cas_option, &cas_options)
2233ad45 878 argv_array_push(&args, cas_option->string);
b227bbc4 879 argv_array_push(&args, url.buf);
de1a2fdd 880 for (i = 0; i < nr_spec; i++)
222b1212 881 argv_array_push(&args, specs[i]);
de1a2fdd
SP
882
883 memset(&rpc, 0, sizeof(rpc));
884 rpc.service_name = "git-receive-pack",
222b1212 885 rpc.argv = args.argv;
de1a2fdd
SP
886
887 err = rpc_service(&rpc, heads);
888 if (rpc.result.len)
cdf4fb8e 889 write_or_die(1, rpc.result.buf, rpc.result.len);
de1a2fdd 890 strbuf_release(&rpc.result);
222b1212 891 argv_array_clear(&args);
de1a2fdd
SP
892 return err;
893}
894
895static int push(int nr_spec, char **specs)
896{
2a455202 897 struct discovery *heads = discover_refs("git-receive-pack", 1);
de1a2fdd
SP
898 int ret;
899
900 if (heads->proto_git)
901 ret = push_git(heads, nr_spec, specs);
902 else
903 ret = push_dav(nr_spec, specs);
904 free_discovery(heads);
905 return ret;
906}
907
ae4efe19
SP
908static void parse_push(struct strbuf *buf)
909{
910 char **specs = NULL;
5238cbf6 911 int alloc_spec = 0, nr_spec = 0, i, ret;
ae4efe19
SP
912
913 do {
59556548 914 if (starts_with(buf->buf, "push ")) {
ae4efe19
SP
915 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
916 specs[nr_spec++] = xstrdup(buf->buf + 5);
917 }
918 else
919 die("http transport does not support %s", buf->buf);
920
921 strbuf_reset(buf);
922 if (strbuf_getline(buf, stdin, '\n') == EOF)
dc4cd767 923 goto free_specs;
ae4efe19
SP
924 if (!*buf->buf)
925 break;
926 } while (1);
927
5238cbf6 928 ret = push(nr_spec, specs);
ae4efe19
SP
929 printf("\n");
930 fflush(stdout);
dc4cd767 931
5238cbf6
SP
932 if (ret)
933 exit(128); /* error already reported */
934
dc4cd767
JM
935 free_specs:
936 for (i = 0; i < nr_spec; i++)
937 free(specs[i]);
938 free(specs);
ae4efe19
SP
939}
940
a2d725b7
DB
941int main(int argc, const char **argv)
942{
a2d725b7 943 struct strbuf buf = STRBUF_INIT;
a45d3d7e 944 int nongit;
a2d725b7 945
c6dfb399 946 git_extract_argv0_path(argv[0]);
a45d3d7e 947 setup_git_directory_gently(&nongit);
a2d725b7
DB
948 if (argc < 2) {
949 fprintf(stderr, "Remote needed\n");
950 return 1;
951 }
952
ef08ef9e
SP
953 options.verbosity = 1;
954 options.progress = !!isatty(2);
de1a2fdd 955 options.thin = 1;
ef08ef9e 956
a2d725b7
DB
957 remote = remote_get(argv[1]);
958
959 if (argc > 2) {
b227bbc4 960 end_url_with_slash(&url, argv[2]);
a2d725b7 961 } else {
b227bbc4 962 end_url_with_slash(&url, remote->url[0]);
a2d725b7
DB
963 }
964
b227bbc4 965 http_init(remote, url.buf, 0);
888692b7 966
a2d725b7 967 do {
1843f0ce
SR
968 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
969 if (ferror(stdin))
970 fprintf(stderr, "Error reading command stream\n");
971 else
972 fprintf(stderr, "Unexpected end of command stream\n");
973 return 1;
974 }
975 if (buf.len == 0)
a2d725b7 976 break;
59556548 977 if (starts_with(buf.buf, "fetch ")) {
a45d3d7e
DB
978 if (nongit)
979 die("Fetch attempted without a local repo");
292ce46b
SP
980 parse_fetch(&buf);
981
59556548 982 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
97cc7bc4
SP
983 int for_push = !!strstr(buf.buf + 4, "for-push");
984 output_refs(get_refs(for_push));
ae4efe19 985
59556548 986 } else if (starts_with(buf.buf, "push ")) {
ae4efe19
SP
987 parse_push(&buf);
988
59556548 989 } else if (starts_with(buf.buf, "option ")) {
ef08ef9e
SP
990 char *name = buf.buf + strlen("option ");
991 char *value = strchr(name, ' ');
992 int result;
993
994 if (value)
995 *value++ = '\0';
996 else
997 value = "true";
998
999 result = set_option(name, value);
1000 if (!result)
1001 printf("ok\n");
1002 else if (result < 0)
1003 printf("error invalid value\n");
1004 else
1005 printf("unsupported\n");
a2d725b7 1006 fflush(stdout);
ef08ef9e 1007
a2d725b7
DB
1008 } else if (!strcmp(buf.buf, "capabilities")) {
1009 printf("fetch\n");
ef08ef9e 1010 printf("option\n");
ae4efe19 1011 printf("push\n");
9ba38048 1012 printf("check-connectivity\n");
a2d725b7
DB
1013 printf("\n");
1014 fflush(stdout);
1015 } else {
1843f0ce 1016 fprintf(stderr, "Unknown command '%s'\n", buf.buf);
a2d725b7
DB
1017 return 1;
1018 }
1019 strbuf_reset(&buf);
1020 } while (1);
888692b7
TRC
1021
1022 http_cleanup();
1023
a2d725b7
DB
1024 return 0;
1025}