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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "remote.h" | |
4 | #include "connect.h" | |
5 | #include "strbuf.h" | |
6 | #include "walker.h" | |
7 | #include "http.h" | |
8 | #include "exec-cmd.h" | |
9 | #include "run-command.h" | |
10 | #include "pkt-line.h" | |
11 | #include "string-list.h" | |
12 | #include "sideband.h" | |
13 | #include "argv-array.h" | |
14 | #include "credential.h" | |
15 | #include "sha1-array.h" | |
16 | #include "send-pack.h" | |
17 | #include "protocol.h" | |
18 | #include "quote.h" | |
19 | ||
20 | static struct remote *remote; | |
21 | /* always ends with a trailing slash */ | |
22 | static struct strbuf url = STRBUF_INIT; | |
23 | ||
24 | struct options { | |
25 | int verbosity; | |
26 | unsigned long depth; | |
27 | char *deepen_since; | |
28 | struct string_list deepen_not; | |
29 | struct string_list push_options; | |
30 | char *filter; | |
31 | unsigned progress : 1, | |
32 | check_self_contained_and_connected : 1, | |
33 | cloning : 1, | |
34 | update_shallow : 1, | |
35 | followtags : 1, | |
36 | dry_run : 1, | |
37 | thin : 1, | |
38 | /* One of the SEND_PACK_PUSH_CERT_* constants. */ | |
39 | push_cert : 2, | |
40 | deepen_relative : 1, | |
41 | from_promisor : 1, | |
42 | no_dependents : 1; | |
43 | }; | |
44 | static struct options options; | |
45 | static struct string_list cas_options = STRING_LIST_INIT_DUP; | |
46 | ||
47 | static 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; | |
64 | return 0; | |
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; | |
72 | return 0; | |
73 | } | |
74 | else if (!strcmp(name, "deepen-since")) { | |
75 | options.deepen_since = xstrdup(value); | |
76 | return 0; | |
77 | } | |
78 | else if (!strcmp(name, "deepen-not")) { | |
79 | string_list_append(&options.deepen_not, value); | |
80 | return 0; | |
81 | } | |
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 | } | |
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; | |
98 | return 0; | |
99 | } | |
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 | } | |
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 | } | |
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; | |
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; | |
140 | } else if (!strcmp(name, "pushcert")) { | |
141 | if (!strcmp(value, "true")) | |
142 | options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS; | |
143 | else if (!strcmp(value, "false")) | |
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; | |
147 | else | |
148 | return -1; | |
149 | return 0; | |
150 | } else if (!strcmp(name, "push-option")) { | |
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 | } | |
160 | return 0; | |
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 */ | |
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; | |
180 | } else if (!strcmp(name, "filter")) { | |
181 | options.filter = xstrdup(value); | |
182 | return 0; | |
183 | } else { | |
184 | return 1 /* unsupported */; | |
185 | } | |
186 | } | |
187 | ||
188 | struct discovery { | |
189 | char *service; | |
190 | char *buf_alloc; | |
191 | char *buf; | |
192 | size_t len; | |
193 | struct ref *refs; | |
194 | struct oid_array shallow; | |
195 | enum protocol_version version; | |
196 | unsigned proto_git : 1; | |
197 | }; | |
198 | static struct discovery *last_discovery; | |
199 | ||
200 | static struct ref *parse_git_refs(struct discovery *heads, int for_push) | |
201 | { | |
202 | struct ref *list = NULL; | |
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 | PACKET_READ_DIE_ON_ERR_PACKET); | |
209 | ||
210 | heads->version = discover_version(&reader); | |
211 | switch (heads->version) { | |
212 | case protocol_v2: | |
213 | /* | |
214 | * Do nothing. This isn't a list of refs but rather a | |
215 | * capability advertisement. Client would have run | |
216 | * 'stateless-connect' so we'll dump this capability listing | |
217 | * and let them request the refs themselves. | |
218 | */ | |
219 | break; | |
220 | case protocol_v1: | |
221 | case protocol_v0: | |
222 | get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0, | |
223 | NULL, &heads->shallow); | |
224 | break; | |
225 | case protocol_unknown_version: | |
226 | BUG("unknown protocol version"); | |
227 | } | |
228 | ||
229 | return list; | |
230 | } | |
231 | ||
232 | static struct ref *parse_info_refs(struct discovery *heads) | |
233 | { | |
234 | char *data, *start, *mid; | |
235 | char *ref_name; | |
236 | int i = 0; | |
237 | ||
238 | struct ref *refs = NULL; | |
239 | struct ref *ref = NULL; | |
240 | struct ref *last_ref = NULL; | |
241 | ||
242 | data = heads->buf; | |
243 | start = NULL; | |
244 | mid = data; | |
245 | while (i < heads->len) { | |
246 | if (!start) { | |
247 | start = &data[i]; | |
248 | } | |
249 | if (data[i] == '\t') | |
250 | mid = &data[i]; | |
251 | if (data[i] == '\n') { | |
252 | if (mid - start != 40) | |
253 | die("%sinfo/refs not valid: is this a git repository?", | |
254 | url.buf); | |
255 | data[i] = 0; | |
256 | ref_name = mid + 1; | |
257 | ref = alloc_ref(ref_name); | |
258 | get_oid_hex(start, &ref->old_oid); | |
259 | if (!refs) | |
260 | refs = ref; | |
261 | if (last_ref) | |
262 | last_ref->next = ref; | |
263 | last_ref = ref; | |
264 | start = NULL; | |
265 | } | |
266 | i++; | |
267 | } | |
268 | ||
269 | ref = alloc_ref("HEAD"); | |
270 | if (!http_fetch_ref(url.buf, ref) && | |
271 | !resolve_remote_symref(ref, refs)) { | |
272 | ref->next = refs; | |
273 | refs = ref; | |
274 | } else { | |
275 | free(ref); | |
276 | } | |
277 | ||
278 | return refs; | |
279 | } | |
280 | ||
281 | static void free_discovery(struct discovery *d) | |
282 | { | |
283 | if (d) { | |
284 | if (d == last_discovery) | |
285 | last_discovery = NULL; | |
286 | free(d->shallow.oid); | |
287 | free(d->buf_alloc); | |
288 | free_refs(d->refs); | |
289 | free(d->service); | |
290 | free(d); | |
291 | } | |
292 | } | |
293 | ||
294 | static int show_http_message(struct strbuf *type, struct strbuf *charset, | |
295 | struct strbuf *msg) | |
296 | { | |
297 | const char *p, *eol; | |
298 | ||
299 | /* | |
300 | * We only show text/plain parts, as other types are likely | |
301 | * to be ugly to look at on the user's terminal. | |
302 | */ | |
303 | if (strcmp(type->buf, "text/plain")) | |
304 | return -1; | |
305 | if (charset->len) | |
306 | strbuf_reencode(msg, charset->buf, get_log_output_encoding()); | |
307 | ||
308 | strbuf_trim(msg); | |
309 | if (!msg->len) | |
310 | return -1; | |
311 | ||
312 | p = msg->buf; | |
313 | do { | |
314 | eol = strchrnul(p, '\n'); | |
315 | fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p); | |
316 | p = eol + 1; | |
317 | } while(*eol); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | static int get_protocol_http_header(enum protocol_version version, | |
322 | struct strbuf *header) | |
323 | { | |
324 | if (version > 0) { | |
325 | strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d", | |
326 | version); | |
327 | ||
328 | return 1; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | static struct discovery *discover_refs(const char *service, int for_push) | |
335 | { | |
336 | struct strbuf exp = STRBUF_INIT; | |
337 | struct strbuf type = STRBUF_INIT; | |
338 | struct strbuf charset = STRBUF_INIT; | |
339 | struct strbuf buffer = STRBUF_INIT; | |
340 | struct strbuf refs_url = STRBUF_INIT; | |
341 | struct strbuf effective_url = STRBUF_INIT; | |
342 | struct strbuf protocol_header = STRBUF_INIT; | |
343 | struct string_list extra_headers = STRING_LIST_INIT_DUP; | |
344 | struct discovery *last = last_discovery; | |
345 | int http_ret, maybe_smart = 0; | |
346 | struct http_get_options http_options; | |
347 | enum protocol_version version = get_protocol_version_config(); | |
348 | ||
349 | if (last && !strcmp(service, last->service)) | |
350 | return last; | |
351 | free_discovery(last); | |
352 | ||
353 | strbuf_addf(&refs_url, "%sinfo/refs", url.buf); | |
354 | if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) && | |
355 | git_env_bool("GIT_SMART_HTTP", 1)) { | |
356 | maybe_smart = 1; | |
357 | if (!strchr(url.buf, '?')) | |
358 | strbuf_addch(&refs_url, '?'); | |
359 | else | |
360 | strbuf_addch(&refs_url, '&'); | |
361 | strbuf_addf(&refs_url, "service=%s", service); | |
362 | } | |
363 | ||
364 | /* | |
365 | * NEEDSWORK: If we are trying to use protocol v2 and we are planning | |
366 | * to perform a push, then fallback to v0 since the client doesn't know | |
367 | * how to push yet using v2. | |
368 | */ | |
369 | if (version == protocol_v2 && !strcmp("git-receive-pack", service)) | |
370 | version = protocol_v0; | |
371 | ||
372 | /* Add the extra Git-Protocol header */ | |
373 | if (get_protocol_http_header(version, &protocol_header)) | |
374 | string_list_append(&extra_headers, protocol_header.buf); | |
375 | ||
376 | memset(&http_options, 0, sizeof(http_options)); | |
377 | http_options.content_type = &type; | |
378 | http_options.charset = &charset; | |
379 | http_options.effective_url = &effective_url; | |
380 | http_options.base_url = &url; | |
381 | http_options.extra_headers = &extra_headers; | |
382 | http_options.initial_request = 1; | |
383 | http_options.no_cache = 1; | |
384 | ||
385 | http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options); | |
386 | switch (http_ret) { | |
387 | case HTTP_OK: | |
388 | break; | |
389 | case HTTP_MISSING_TARGET: | |
390 | show_http_message(&type, &charset, &buffer); | |
391 | die("repository '%s' not found", url.buf); | |
392 | case HTTP_NOAUTH: | |
393 | show_http_message(&type, &charset, &buffer); | |
394 | die("Authentication failed for '%s'", url.buf); | |
395 | default: | |
396 | show_http_message(&type, &charset, &buffer); | |
397 | die("unable to access '%s': %s", url.buf, curl_errorstr); | |
398 | } | |
399 | ||
400 | if (options.verbosity && !starts_with(refs_url.buf, url.buf)) | |
401 | warning(_("redirecting to %s"), url.buf); | |
402 | ||
403 | last= xcalloc(1, sizeof(*last_discovery)); | |
404 | last->service = xstrdup(service); | |
405 | last->buf_alloc = strbuf_detach(&buffer, &last->len); | |
406 | last->buf = last->buf_alloc; | |
407 | ||
408 | strbuf_addf(&exp, "application/x-%s-advertisement", service); | |
409 | if (maybe_smart && | |
410 | (5 <= last->len && last->buf[4] == '#') && | |
411 | !strbuf_cmp(&exp, &type)) { | |
412 | struct packet_reader reader; | |
413 | packet_reader_init(&reader, -1, last->buf, last->len, | |
414 | PACKET_READ_CHOMP_NEWLINE | | |
415 | PACKET_READ_DIE_ON_ERR_PACKET); | |
416 | ||
417 | /* | |
418 | * smart HTTP response; validate that the service | |
419 | * pkt-line matches our request. | |
420 | */ | |
421 | if (packet_reader_read(&reader) != PACKET_READ_NORMAL) | |
422 | die("invalid server response; expected service, got flush packet"); | |
423 | ||
424 | strbuf_reset(&exp); | |
425 | strbuf_addf(&exp, "# service=%s", service); | |
426 | if (strcmp(reader.line, exp.buf)) | |
427 | die("invalid server response; got '%s'", reader.line); | |
428 | strbuf_release(&exp); | |
429 | ||
430 | /* The header can include additional metadata lines, up | |
431 | * until a packet flush marker. Ignore these now, but | |
432 | * in the future we might start to scan them. | |
433 | */ | |
434 | for (;;) { | |
435 | packet_reader_read(&reader); | |
436 | if (reader.pktlen <= 0) { | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | last->buf = reader.src_buffer; | |
442 | last->len = reader.src_len; | |
443 | ||
444 | last->proto_git = 1; | |
445 | } else if (maybe_smart && | |
446 | last->len > 5 && starts_with(last->buf + 4, "version 2")) { | |
447 | last->proto_git = 1; | |
448 | } | |
449 | ||
450 | if (last->proto_git) | |
451 | last->refs = parse_git_refs(last, for_push); | |
452 | else | |
453 | last->refs = parse_info_refs(last); | |
454 | ||
455 | strbuf_release(&refs_url); | |
456 | strbuf_release(&exp); | |
457 | strbuf_release(&type); | |
458 | strbuf_release(&charset); | |
459 | strbuf_release(&effective_url); | |
460 | strbuf_release(&buffer); | |
461 | strbuf_release(&protocol_header); | |
462 | string_list_clear(&extra_headers, 0); | |
463 | last_discovery = last; | |
464 | return last; | |
465 | } | |
466 | ||
467 | static struct ref *get_refs(int for_push) | |
468 | { | |
469 | struct discovery *heads; | |
470 | ||
471 | if (for_push) | |
472 | heads = discover_refs("git-receive-pack", for_push); | |
473 | else | |
474 | heads = discover_refs("git-upload-pack", for_push); | |
475 | ||
476 | return heads->refs; | |
477 | } | |
478 | ||
479 | static void output_refs(struct ref *refs) | |
480 | { | |
481 | struct ref *posn; | |
482 | for (posn = refs; posn; posn = posn->next) { | |
483 | if (posn->symref) | |
484 | printf("@%s %s\n", posn->symref, posn->name); | |
485 | else | |
486 | printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name); | |
487 | } | |
488 | printf("\n"); | |
489 | fflush(stdout); | |
490 | } | |
491 | ||
492 | struct rpc_state { | |
493 | const char *service_name; | |
494 | const char **argv; | |
495 | struct strbuf *stdin_preamble; | |
496 | char *service_url; | |
497 | char *hdr_content_type; | |
498 | char *hdr_accept; | |
499 | char *protocol_header; | |
500 | char *buf; | |
501 | size_t alloc; | |
502 | size_t len; | |
503 | size_t pos; | |
504 | int in; | |
505 | int out; | |
506 | int any_written; | |
507 | struct strbuf result; | |
508 | unsigned gzip_request : 1; | |
509 | unsigned initial_buffer : 1; | |
510 | }; | |
511 | ||
512 | static size_t rpc_out(void *ptr, size_t eltsize, | |
513 | size_t nmemb, void *buffer_) | |
514 | { | |
515 | size_t max = eltsize * nmemb; | |
516 | struct rpc_state *rpc = buffer_; | |
517 | size_t avail = rpc->len - rpc->pos; | |
518 | ||
519 | if (!avail) { | |
520 | rpc->initial_buffer = 0; | |
521 | avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); | |
522 | if (!avail) | |
523 | return 0; | |
524 | rpc->pos = 0; | |
525 | rpc->len = avail; | |
526 | } | |
527 | ||
528 | if (max < avail) | |
529 | avail = max; | |
530 | memcpy(ptr, rpc->buf + rpc->pos, avail); | |
531 | rpc->pos += avail; | |
532 | return avail; | |
533 | } | |
534 | ||
535 | #ifndef NO_CURL_IOCTL | |
536 | static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp) | |
537 | { | |
538 | struct rpc_state *rpc = clientp; | |
539 | ||
540 | switch (cmd) { | |
541 | case CURLIOCMD_NOP: | |
542 | return CURLIOE_OK; | |
543 | ||
544 | case CURLIOCMD_RESTARTREAD: | |
545 | if (rpc->initial_buffer) { | |
546 | rpc->pos = 0; | |
547 | return CURLIOE_OK; | |
548 | } | |
549 | error("unable to rewind rpc post data - try increasing http.postBuffer"); | |
550 | return CURLIOE_FAILRESTART; | |
551 | ||
552 | default: | |
553 | return CURLIOE_UNKNOWNCMD; | |
554 | } | |
555 | } | |
556 | #endif | |
557 | ||
558 | struct rpc_in_data { | |
559 | struct rpc_state *rpc; | |
560 | struct active_request_slot *slot; | |
561 | }; | |
562 | ||
563 | /* | |
564 | * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed | |
565 | * from ptr. | |
566 | */ | |
567 | static size_t rpc_in(char *ptr, size_t eltsize, | |
568 | size_t nmemb, void *buffer_) | |
569 | { | |
570 | size_t size = eltsize * nmemb; | |
571 | struct rpc_in_data *data = buffer_; | |
572 | long response_code; | |
573 | ||
574 | if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE, | |
575 | &response_code) != CURLE_OK) | |
576 | return size; | |
577 | if (response_code >= 300) | |
578 | return size; | |
579 | if (size) | |
580 | data->rpc->any_written = 1; | |
581 | write_or_die(data->rpc->in, ptr, size); | |
582 | return size; | |
583 | } | |
584 | ||
585 | static int run_slot(struct active_request_slot *slot, | |
586 | struct slot_results *results) | |
587 | { | |
588 | int err; | |
589 | struct slot_results results_buf; | |
590 | ||
591 | if (!results) | |
592 | results = &results_buf; | |
593 | ||
594 | err = run_one_slot(slot, results); | |
595 | ||
596 | if (err != HTTP_OK && err != HTTP_REAUTH) { | |
597 | struct strbuf msg = STRBUF_INIT; | |
598 | if (results->http_code && results->http_code != 200) | |
599 | strbuf_addf(&msg, "HTTP %ld", results->http_code); | |
600 | if (results->curl_result != CURLE_OK) { | |
601 | if (msg.len) | |
602 | strbuf_addch(&msg, ' '); | |
603 | strbuf_addf(&msg, "curl %d", results->curl_result); | |
604 | if (curl_errorstr[0]) { | |
605 | strbuf_addch(&msg, ' '); | |
606 | strbuf_addstr(&msg, curl_errorstr); | |
607 | } | |
608 | } | |
609 | error("RPC failed; %s", msg.buf); | |
610 | strbuf_release(&msg); | |
611 | } | |
612 | ||
613 | return err; | |
614 | } | |
615 | ||
616 | static int probe_rpc(struct rpc_state *rpc, struct slot_results *results) | |
617 | { | |
618 | struct active_request_slot *slot; | |
619 | struct curl_slist *headers = http_copy_default_headers(); | |
620 | struct strbuf buf = STRBUF_INIT; | |
621 | int err; | |
622 | ||
623 | slot = get_active_slot(); | |
624 | ||
625 | headers = curl_slist_append(headers, rpc->hdr_content_type); | |
626 | headers = curl_slist_append(headers, rpc->hdr_accept); | |
627 | ||
628 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
629 | curl_easy_setopt(slot->curl, CURLOPT_POST, 1); | |
630 | curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); | |
631 | curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL); | |
632 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000"); | |
633 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4); | |
634 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); | |
635 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); | |
636 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf); | |
637 | ||
638 | err = run_slot(slot, results); | |
639 | ||
640 | curl_slist_free_all(headers); | |
641 | strbuf_release(&buf); | |
642 | return err; | |
643 | } | |
644 | ||
645 | static curl_off_t xcurl_off_t(size_t len) | |
646 | { | |
647 | uintmax_t size = len; | |
648 | if (size > maximum_signed_value_of_type(curl_off_t)) | |
649 | die("cannot handle pushes this big"); | |
650 | return (curl_off_t)size; | |
651 | } | |
652 | ||
653 | static int post_rpc(struct rpc_state *rpc) | |
654 | { | |
655 | struct active_request_slot *slot; | |
656 | struct curl_slist *headers = http_copy_default_headers(); | |
657 | int use_gzip = rpc->gzip_request; | |
658 | char *gzip_body = NULL; | |
659 | size_t gzip_size = 0; | |
660 | int err, large_request = 0; | |
661 | int needs_100_continue = 0; | |
662 | struct rpc_in_data rpc_in_data; | |
663 | ||
664 | /* Try to load the entire request, if we can fit it into the | |
665 | * allocated buffer space we can use HTTP/1.0 and avoid the | |
666 | * chunked encoding mess. | |
667 | */ | |
668 | while (1) { | |
669 | size_t left = rpc->alloc - rpc->len; | |
670 | char *buf = rpc->buf + rpc->len; | |
671 | int n; | |
672 | ||
673 | if (left < LARGE_PACKET_MAX) { | |
674 | large_request = 1; | |
675 | use_gzip = 0; | |
676 | break; | |
677 | } | |
678 | ||
679 | n = packet_read(rpc->out, NULL, NULL, buf, left, 0); | |
680 | if (!n) | |
681 | break; | |
682 | rpc->len += n; | |
683 | } | |
684 | ||
685 | if (large_request) { | |
686 | struct slot_results results; | |
687 | ||
688 | do { | |
689 | err = probe_rpc(rpc, &results); | |
690 | if (err == HTTP_REAUTH) | |
691 | credential_fill(&http_auth); | |
692 | } while (err == HTTP_REAUTH); | |
693 | if (err != HTTP_OK) | |
694 | return -1; | |
695 | ||
696 | if (results.auth_avail & CURLAUTH_GSSNEGOTIATE) | |
697 | needs_100_continue = 1; | |
698 | } | |
699 | ||
700 | headers = curl_slist_append(headers, rpc->hdr_content_type); | |
701 | headers = curl_slist_append(headers, rpc->hdr_accept); | |
702 | headers = curl_slist_append(headers, needs_100_continue ? | |
703 | "Expect: 100-continue" : "Expect:"); | |
704 | ||
705 | /* Add the extra Git-Protocol header */ | |
706 | if (rpc->protocol_header) | |
707 | headers = curl_slist_append(headers, rpc->protocol_header); | |
708 | ||
709 | retry: | |
710 | slot = get_active_slot(); | |
711 | ||
712 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
713 | curl_easy_setopt(slot->curl, CURLOPT_POST, 1); | |
714 | curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); | |
715 | curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); | |
716 | ||
717 | if (large_request) { | |
718 | /* The request body is large and the size cannot be predicted. | |
719 | * We must use chunked encoding to send it. | |
720 | */ | |
721 | headers = curl_slist_append(headers, "Transfer-Encoding: chunked"); | |
722 | rpc->initial_buffer = 1; | |
723 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out); | |
724 | curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc); | |
725 | #ifndef NO_CURL_IOCTL | |
726 | curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl); | |
727 | curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc); | |
728 | #endif | |
729 | if (options.verbosity > 1) { | |
730 | fprintf(stderr, "POST %s (chunked)\n", rpc->service_name); | |
731 | fflush(stderr); | |
732 | } | |
733 | ||
734 | } else if (gzip_body) { | |
735 | /* | |
736 | * If we are looping to retry authentication, then the previous | |
737 | * run will have set up the headers and gzip buffer already, | |
738 | * and we just need to send it. | |
739 | */ | |
740 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); | |
741 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size)); | |
742 | ||
743 | } else if (use_gzip && 1024 < rpc->len) { | |
744 | /* The client backend isn't giving us compressed data so | |
745 | * we can try to deflate it ourselves, this may save on | |
746 | * the transfer time. | |
747 | */ | |
748 | git_zstream stream; | |
749 | int ret; | |
750 | ||
751 | git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION); | |
752 | gzip_size = git_deflate_bound(&stream, rpc->len); | |
753 | gzip_body = xmalloc(gzip_size); | |
754 | ||
755 | stream.next_in = (unsigned char *)rpc->buf; | |
756 | stream.avail_in = rpc->len; | |
757 | stream.next_out = (unsigned char *)gzip_body; | |
758 | stream.avail_out = gzip_size; | |
759 | ||
760 | ret = git_deflate(&stream, Z_FINISH); | |
761 | if (ret != Z_STREAM_END) | |
762 | die("cannot deflate request; zlib deflate error %d", ret); | |
763 | ||
764 | ret = git_deflate_end_gently(&stream); | |
765 | if (ret != Z_OK) | |
766 | die("cannot deflate request; zlib end error %d", ret); | |
767 | ||
768 | gzip_size = stream.total_out; | |
769 | ||
770 | headers = curl_slist_append(headers, "Content-Encoding: gzip"); | |
771 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); | |
772 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size)); | |
773 | ||
774 | if (options.verbosity > 1) { | |
775 | fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n", | |
776 | rpc->service_name, | |
777 | (unsigned long)rpc->len, (unsigned long)gzip_size); | |
778 | fflush(stderr); | |
779 | } | |
780 | } else { | |
781 | /* We know the complete request size in advance, use the | |
782 | * more normal Content-Length approach. | |
783 | */ | |
784 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf); | |
785 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len)); | |
786 | if (options.verbosity > 1) { | |
787 | fprintf(stderr, "POST %s (%lu bytes)\n", | |
788 | rpc->service_name, (unsigned long)rpc->len); | |
789 | fflush(stderr); | |
790 | } | |
791 | } | |
792 | ||
793 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); | |
794 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in); | |
795 | rpc_in_data.rpc = rpc; | |
796 | rpc_in_data.slot = slot; | |
797 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data); | |
798 | curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); | |
799 | ||
800 | ||
801 | rpc->any_written = 0; | |
802 | err = run_slot(slot, NULL); | |
803 | if (err == HTTP_REAUTH && !large_request) { | |
804 | credential_fill(&http_auth); | |
805 | goto retry; | |
806 | } | |
807 | if (err != HTTP_OK) | |
808 | err = -1; | |
809 | ||
810 | if (!rpc->any_written) | |
811 | err = -1; | |
812 | ||
813 | curl_slist_free_all(headers); | |
814 | free(gzip_body); | |
815 | return err; | |
816 | } | |
817 | ||
818 | static int rpc_service(struct rpc_state *rpc, struct discovery *heads) | |
819 | { | |
820 | const char *svc = rpc->service_name; | |
821 | struct strbuf buf = STRBUF_INIT; | |
822 | struct strbuf *preamble = rpc->stdin_preamble; | |
823 | struct child_process client = CHILD_PROCESS_INIT; | |
824 | int err = 0; | |
825 | ||
826 | client.in = -1; | |
827 | client.out = -1; | |
828 | client.git_cmd = 1; | |
829 | client.argv = rpc->argv; | |
830 | if (start_command(&client)) | |
831 | exit(1); | |
832 | if (preamble) | |
833 | write_or_die(client.in, preamble->buf, preamble->len); | |
834 | if (heads) | |
835 | write_or_die(client.in, heads->buf, heads->len); | |
836 | ||
837 | rpc->alloc = http_post_buffer; | |
838 | rpc->buf = xmalloc(rpc->alloc); | |
839 | rpc->in = client.in; | |
840 | rpc->out = client.out; | |
841 | strbuf_init(&rpc->result, 0); | |
842 | ||
843 | strbuf_addf(&buf, "%s%s", url.buf, svc); | |
844 | rpc->service_url = strbuf_detach(&buf, NULL); | |
845 | ||
846 | strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc); | |
847 | rpc->hdr_content_type = strbuf_detach(&buf, NULL); | |
848 | ||
849 | strbuf_addf(&buf, "Accept: application/x-%s-result", svc); | |
850 | rpc->hdr_accept = strbuf_detach(&buf, NULL); | |
851 | ||
852 | if (get_protocol_http_header(heads->version, &buf)) | |
853 | rpc->protocol_header = strbuf_detach(&buf, NULL); | |
854 | else | |
855 | rpc->protocol_header = NULL; | |
856 | ||
857 | while (!err) { | |
858 | int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); | |
859 | if (!n) | |
860 | break; | |
861 | rpc->pos = 0; | |
862 | rpc->len = n; | |
863 | err |= post_rpc(rpc); | |
864 | } | |
865 | ||
866 | close(client.in); | |
867 | client.in = -1; | |
868 | if (!err) { | |
869 | strbuf_read(&rpc->result, client.out, 0); | |
870 | } else { | |
871 | char buf[4096]; | |
872 | for (;;) | |
873 | if (xread(client.out, buf, sizeof(buf)) <= 0) | |
874 | break; | |
875 | } | |
876 | ||
877 | close(client.out); | |
878 | client.out = -1; | |
879 | ||
880 | err |= finish_command(&client); | |
881 | free(rpc->service_url); | |
882 | free(rpc->hdr_content_type); | |
883 | free(rpc->hdr_accept); | |
884 | free(rpc->protocol_header); | |
885 | free(rpc->buf); | |
886 | strbuf_release(&buf); | |
887 | return err; | |
888 | } | |
889 | ||
890 | static int fetch_dumb(int nr_heads, struct ref **to_fetch) | |
891 | { | |
892 | struct walker *walker; | |
893 | char **targets; | |
894 | int ret, i; | |
895 | ||
896 | ALLOC_ARRAY(targets, nr_heads); | |
897 | if (options.depth || options.deepen_since) | |
898 | die("dumb http transport does not support shallow capabilities"); | |
899 | for (i = 0; i < nr_heads; i++) | |
900 | targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid)); | |
901 | ||
902 | walker = get_http_walker(url.buf); | |
903 | walker->get_verbosely = options.verbosity >= 3; | |
904 | walker->get_recover = 0; | |
905 | ret = walker_fetch(walker, nr_heads, targets, NULL, NULL); | |
906 | walker_free(walker); | |
907 | ||
908 | for (i = 0; i < nr_heads; i++) | |
909 | free(targets[i]); | |
910 | free(targets); | |
911 | ||
912 | return ret ? error("fetch failed.") : 0; | |
913 | } | |
914 | ||
915 | static int fetch_git(struct discovery *heads, | |
916 | int nr_heads, struct ref **to_fetch) | |
917 | { | |
918 | struct rpc_state rpc; | |
919 | struct strbuf preamble = STRBUF_INIT; | |
920 | int i, err; | |
921 | struct argv_array args = ARGV_ARRAY_INIT; | |
922 | ||
923 | argv_array_pushl(&args, "fetch-pack", "--stateless-rpc", | |
924 | "--stdin", "--lock-pack", NULL); | |
925 | if (options.followtags) | |
926 | argv_array_push(&args, "--include-tag"); | |
927 | if (options.thin) | |
928 | argv_array_push(&args, "--thin"); | |
929 | if (options.verbosity >= 3) | |
930 | argv_array_pushl(&args, "-v", "-v", NULL); | |
931 | if (options.check_self_contained_and_connected) | |
932 | argv_array_push(&args, "--check-self-contained-and-connected"); | |
933 | if (options.cloning) | |
934 | argv_array_push(&args, "--cloning"); | |
935 | if (options.update_shallow) | |
936 | argv_array_push(&args, "--update-shallow"); | |
937 | if (!options.progress) | |
938 | argv_array_push(&args, "--no-progress"); | |
939 | if (options.depth) | |
940 | argv_array_pushf(&args, "--depth=%lu", options.depth); | |
941 | if (options.deepen_since) | |
942 | argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since); | |
943 | for (i = 0; i < options.deepen_not.nr; i++) | |
944 | argv_array_pushf(&args, "--shallow-exclude=%s", | |
945 | options.deepen_not.items[i].string); | |
946 | if (options.deepen_relative && options.depth) | |
947 | argv_array_push(&args, "--deepen-relative"); | |
948 | if (options.from_promisor) | |
949 | argv_array_push(&args, "--from-promisor"); | |
950 | if (options.no_dependents) | |
951 | argv_array_push(&args, "--no-dependents"); | |
952 | if (options.filter) | |
953 | argv_array_pushf(&args, "--filter=%s", options.filter); | |
954 | argv_array_push(&args, url.buf); | |
955 | ||
956 | for (i = 0; i < nr_heads; i++) { | |
957 | struct ref *ref = to_fetch[i]; | |
958 | if (!*ref->name) | |
959 | die("cannot fetch by sha1 over smart http"); | |
960 | packet_buf_write(&preamble, "%s %s\n", | |
961 | oid_to_hex(&ref->old_oid), ref->name); | |
962 | } | |
963 | packet_buf_flush(&preamble); | |
964 | ||
965 | memset(&rpc, 0, sizeof(rpc)); | |
966 | rpc.service_name = "git-upload-pack", | |
967 | rpc.argv = args.argv; | |
968 | rpc.stdin_preamble = &preamble; | |
969 | rpc.gzip_request = 1; | |
970 | ||
971 | err = rpc_service(&rpc, heads); | |
972 | if (rpc.result.len) | |
973 | write_or_die(1, rpc.result.buf, rpc.result.len); | |
974 | strbuf_release(&rpc.result); | |
975 | strbuf_release(&preamble); | |
976 | argv_array_clear(&args); | |
977 | return err; | |
978 | } | |
979 | ||
980 | static int fetch(int nr_heads, struct ref **to_fetch) | |
981 | { | |
982 | struct discovery *d = discover_refs("git-upload-pack", 0); | |
983 | if (d->proto_git) | |
984 | return fetch_git(d, nr_heads, to_fetch); | |
985 | else | |
986 | return fetch_dumb(nr_heads, to_fetch); | |
987 | } | |
988 | ||
989 | static void parse_fetch(struct strbuf *buf) | |
990 | { | |
991 | struct ref **to_fetch = NULL; | |
992 | struct ref *list_head = NULL; | |
993 | struct ref **list = &list_head; | |
994 | int alloc_heads = 0, nr_heads = 0; | |
995 | ||
996 | do { | |
997 | const char *p; | |
998 | if (skip_prefix(buf->buf, "fetch ", &p)) { | |
999 | const char *name; | |
1000 | struct ref *ref; | |
1001 | struct object_id old_oid; | |
1002 | ||
1003 | if (get_oid_hex(p, &old_oid)) | |
1004 | die("protocol error: expected sha/ref, got %s'", p); | |
1005 | if (p[GIT_SHA1_HEXSZ] == ' ') | |
1006 | name = p + GIT_SHA1_HEXSZ + 1; | |
1007 | else if (!p[GIT_SHA1_HEXSZ]) | |
1008 | name = ""; | |
1009 | else | |
1010 | die("protocol error: expected sha/ref, got %s'", p); | |
1011 | ||
1012 | ref = alloc_ref(name); | |
1013 | oidcpy(&ref->old_oid, &old_oid); | |
1014 | ||
1015 | *list = ref; | |
1016 | list = &ref->next; | |
1017 | ||
1018 | ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads); | |
1019 | to_fetch[nr_heads++] = ref; | |
1020 | } | |
1021 | else | |
1022 | die("http transport does not support %s", buf->buf); | |
1023 | ||
1024 | strbuf_reset(buf); | |
1025 | if (strbuf_getline_lf(buf, stdin) == EOF) | |
1026 | return; | |
1027 | if (!*buf->buf) | |
1028 | break; | |
1029 | } while (1); | |
1030 | ||
1031 | if (fetch(nr_heads, to_fetch)) | |
1032 | exit(128); /* error already reported */ | |
1033 | free_refs(list_head); | |
1034 | free(to_fetch); | |
1035 | ||
1036 | printf("\n"); | |
1037 | fflush(stdout); | |
1038 | strbuf_reset(buf); | |
1039 | } | |
1040 | ||
1041 | static int push_dav(int nr_spec, char **specs) | |
1042 | { | |
1043 | struct child_process child = CHILD_PROCESS_INIT; | |
1044 | size_t i; | |
1045 | ||
1046 | child.git_cmd = 1; | |
1047 | argv_array_push(&child.args, "http-push"); | |
1048 | argv_array_push(&child.args, "--helper-status"); | |
1049 | if (options.dry_run) | |
1050 | argv_array_push(&child.args, "--dry-run"); | |
1051 | if (options.verbosity > 1) | |
1052 | argv_array_push(&child.args, "--verbose"); | |
1053 | argv_array_push(&child.args, url.buf); | |
1054 | for (i = 0; i < nr_spec; i++) | |
1055 | argv_array_push(&child.args, specs[i]); | |
1056 | ||
1057 | if (run_command(&child)) | |
1058 | die("git-http-push failed"); | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int push_git(struct discovery *heads, int nr_spec, char **specs) | |
1063 | { | |
1064 | struct rpc_state rpc; | |
1065 | int i, err; | |
1066 | struct argv_array args; | |
1067 | struct string_list_item *cas_option; | |
1068 | struct strbuf preamble = STRBUF_INIT; | |
1069 | ||
1070 | argv_array_init(&args); | |
1071 | argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status", | |
1072 | NULL); | |
1073 | ||
1074 | if (options.thin) | |
1075 | argv_array_push(&args, "--thin"); | |
1076 | if (options.dry_run) | |
1077 | argv_array_push(&args, "--dry-run"); | |
1078 | if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS) | |
1079 | argv_array_push(&args, "--signed=yes"); | |
1080 | else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) | |
1081 | argv_array_push(&args, "--signed=if-asked"); | |
1082 | if (options.verbosity == 0) | |
1083 | argv_array_push(&args, "--quiet"); | |
1084 | else if (options.verbosity > 1) | |
1085 | argv_array_push(&args, "--verbose"); | |
1086 | for (i = 0; i < options.push_options.nr; i++) | |
1087 | argv_array_pushf(&args, "--push-option=%s", | |
1088 | options.push_options.items[i].string); | |
1089 | argv_array_push(&args, options.progress ? "--progress" : "--no-progress"); | |
1090 | for_each_string_list_item(cas_option, &cas_options) | |
1091 | argv_array_push(&args, cas_option->string); | |
1092 | argv_array_push(&args, url.buf); | |
1093 | ||
1094 | argv_array_push(&args, "--stdin"); | |
1095 | for (i = 0; i < nr_spec; i++) | |
1096 | packet_buf_write(&preamble, "%s\n", specs[i]); | |
1097 | packet_buf_flush(&preamble); | |
1098 | ||
1099 | memset(&rpc, 0, sizeof(rpc)); | |
1100 | rpc.service_name = "git-receive-pack", | |
1101 | rpc.argv = args.argv; | |
1102 | rpc.stdin_preamble = &preamble; | |
1103 | ||
1104 | err = rpc_service(&rpc, heads); | |
1105 | if (rpc.result.len) | |
1106 | write_or_die(1, rpc.result.buf, rpc.result.len); | |
1107 | strbuf_release(&rpc.result); | |
1108 | strbuf_release(&preamble); | |
1109 | argv_array_clear(&args); | |
1110 | return err; | |
1111 | } | |
1112 | ||
1113 | static int push(int nr_spec, char **specs) | |
1114 | { | |
1115 | struct discovery *heads = discover_refs("git-receive-pack", 1); | |
1116 | int ret; | |
1117 | ||
1118 | if (heads->proto_git) | |
1119 | ret = push_git(heads, nr_spec, specs); | |
1120 | else | |
1121 | ret = push_dav(nr_spec, specs); | |
1122 | free_discovery(heads); | |
1123 | return ret; | |
1124 | } | |
1125 | ||
1126 | static void parse_push(struct strbuf *buf) | |
1127 | { | |
1128 | char **specs = NULL; | |
1129 | int alloc_spec = 0, nr_spec = 0, i, ret; | |
1130 | ||
1131 | do { | |
1132 | if (starts_with(buf->buf, "push ")) { | |
1133 | ALLOC_GROW(specs, nr_spec + 1, alloc_spec); | |
1134 | specs[nr_spec++] = xstrdup(buf->buf + 5); | |
1135 | } | |
1136 | else | |
1137 | die("http transport does not support %s", buf->buf); | |
1138 | ||
1139 | strbuf_reset(buf); | |
1140 | if (strbuf_getline_lf(buf, stdin) == EOF) | |
1141 | goto free_specs; | |
1142 | if (!*buf->buf) | |
1143 | break; | |
1144 | } while (1); | |
1145 | ||
1146 | ret = push(nr_spec, specs); | |
1147 | printf("\n"); | |
1148 | fflush(stdout); | |
1149 | ||
1150 | if (ret) | |
1151 | exit(128); /* error already reported */ | |
1152 | ||
1153 | free_specs: | |
1154 | for (i = 0; i < nr_spec; i++) | |
1155 | free(specs[i]); | |
1156 | free(specs); | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Used to represent the state of a connection to an HTTP server when | |
1161 | * communicating using git's wire-protocol version 2. | |
1162 | */ | |
1163 | struct proxy_state { | |
1164 | char *service_name; | |
1165 | char *service_url; | |
1166 | struct curl_slist *headers; | |
1167 | struct strbuf request_buffer; | |
1168 | int in; | |
1169 | int out; | |
1170 | struct packet_reader reader; | |
1171 | size_t pos; | |
1172 | int seen_flush; | |
1173 | }; | |
1174 | ||
1175 | static void proxy_state_init(struct proxy_state *p, const char *service_name, | |
1176 | enum protocol_version version) | |
1177 | { | |
1178 | struct strbuf buf = STRBUF_INIT; | |
1179 | ||
1180 | memset(p, 0, sizeof(*p)); | |
1181 | p->service_name = xstrdup(service_name); | |
1182 | ||
1183 | p->in = 0; | |
1184 | p->out = 1; | |
1185 | strbuf_init(&p->request_buffer, 0); | |
1186 | ||
1187 | strbuf_addf(&buf, "%s%s", url.buf, p->service_name); | |
1188 | p->service_url = strbuf_detach(&buf, NULL); | |
1189 | ||
1190 | p->headers = http_copy_default_headers(); | |
1191 | ||
1192 | strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name); | |
1193 | p->headers = curl_slist_append(p->headers, buf.buf); | |
1194 | strbuf_reset(&buf); | |
1195 | ||
1196 | strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name); | |
1197 | p->headers = curl_slist_append(p->headers, buf.buf); | |
1198 | strbuf_reset(&buf); | |
1199 | ||
1200 | p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked"); | |
1201 | ||
1202 | /* Add the Git-Protocol header */ | |
1203 | if (get_protocol_http_header(version, &buf)) | |
1204 | p->headers = curl_slist_append(p->headers, buf.buf); | |
1205 | ||
1206 | packet_reader_init(&p->reader, p->in, NULL, 0, | |
1207 | PACKET_READ_GENTLE_ON_EOF | | |
1208 | PACKET_READ_DIE_ON_ERR_PACKET); | |
1209 | ||
1210 | strbuf_release(&buf); | |
1211 | } | |
1212 | ||
1213 | static void proxy_state_clear(struct proxy_state *p) | |
1214 | { | |
1215 | free(p->service_name); | |
1216 | free(p->service_url); | |
1217 | curl_slist_free_all(p->headers); | |
1218 | strbuf_release(&p->request_buffer); | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * CURLOPT_READFUNCTION callback function. | |
1223 | * Attempts to copy over a single packet-line at a time into the | |
1224 | * curl provided buffer. | |
1225 | */ | |
1226 | static size_t proxy_in(char *buffer, size_t eltsize, | |
1227 | size_t nmemb, void *userdata) | |
1228 | { | |
1229 | size_t max; | |
1230 | struct proxy_state *p = userdata; | |
1231 | size_t avail = p->request_buffer.len - p->pos; | |
1232 | ||
1233 | ||
1234 | if (eltsize != 1) | |
1235 | BUG("curl read callback called with size = %"PRIuMAX" != 1", | |
1236 | (uintmax_t)eltsize); | |
1237 | max = nmemb; | |
1238 | ||
1239 | if (!avail) { | |
1240 | if (p->seen_flush) { | |
1241 | p->seen_flush = 0; | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | strbuf_reset(&p->request_buffer); | |
1246 | switch (packet_reader_read(&p->reader)) { | |
1247 | case PACKET_READ_EOF: | |
1248 | die("unexpected EOF when reading from parent process"); | |
1249 | case PACKET_READ_NORMAL: | |
1250 | packet_buf_write_len(&p->request_buffer, p->reader.line, | |
1251 | p->reader.pktlen); | |
1252 | break; | |
1253 | case PACKET_READ_DELIM: | |
1254 | packet_buf_delim(&p->request_buffer); | |
1255 | break; | |
1256 | case PACKET_READ_FLUSH: | |
1257 | packet_buf_flush(&p->request_buffer); | |
1258 | p->seen_flush = 1; | |
1259 | break; | |
1260 | } | |
1261 | p->pos = 0; | |
1262 | avail = p->request_buffer.len; | |
1263 | } | |
1264 | ||
1265 | if (max < avail) | |
1266 | avail = max; | |
1267 | memcpy(buffer, p->request_buffer.buf + p->pos, avail); | |
1268 | p->pos += avail; | |
1269 | return avail; | |
1270 | } | |
1271 | ||
1272 | static size_t proxy_out(char *buffer, size_t eltsize, | |
1273 | size_t nmemb, void *userdata) | |
1274 | { | |
1275 | size_t size; | |
1276 | struct proxy_state *p = userdata; | |
1277 | ||
1278 | if (eltsize != 1) | |
1279 | BUG("curl read callback called with size = %"PRIuMAX" != 1", | |
1280 | (uintmax_t)eltsize); | |
1281 | size = nmemb; | |
1282 | ||
1283 | write_or_die(p->out, buffer, size); | |
1284 | return size; | |
1285 | } | |
1286 | ||
1287 | /* Issues a request to the HTTP server configured in `p` */ | |
1288 | static int proxy_request(struct proxy_state *p) | |
1289 | { | |
1290 | struct active_request_slot *slot; | |
1291 | ||
1292 | slot = get_active_slot(); | |
1293 | ||
1294 | curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); | |
1295 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
1296 | curl_easy_setopt(slot->curl, CURLOPT_POST, 1); | |
1297 | curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url); | |
1298 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers); | |
1299 | ||
1300 | /* Setup function to read request from client */ | |
1301 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in); | |
1302 | curl_easy_setopt(slot->curl, CURLOPT_READDATA, p); | |
1303 | ||
1304 | /* Setup function to write server response to client */ | |
1305 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out); | |
1306 | curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p); | |
1307 | ||
1308 | if (run_slot(slot, NULL) != HTTP_OK) | |
1309 | return -1; | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int stateless_connect(const char *service_name) | |
1315 | { | |
1316 | struct discovery *discover; | |
1317 | struct proxy_state p; | |
1318 | ||
1319 | /* | |
1320 | * Run the info/refs request and see if the server supports protocol | |
1321 | * v2. If and only if the server supports v2 can we successfully | |
1322 | * establish a stateless connection, otherwise we need to tell the | |
1323 | * client to fallback to using other transport helper functions to | |
1324 | * complete their request. | |
1325 | */ | |
1326 | discover = discover_refs(service_name, 0); | |
1327 | if (discover->version != protocol_v2) { | |
1328 | printf("fallback\n"); | |
1329 | fflush(stdout); | |
1330 | return -1; | |
1331 | } else { | |
1332 | /* Stateless Connection established */ | |
1333 | printf("\n"); | |
1334 | fflush(stdout); | |
1335 | } | |
1336 | ||
1337 | proxy_state_init(&p, service_name, discover->version); | |
1338 | ||
1339 | /* | |
1340 | * Dump the capability listing that we got from the server earlier | |
1341 | * during the info/refs request. | |
1342 | */ | |
1343 | write_or_die(p.out, discover->buf, discover->len); | |
1344 | ||
1345 | /* Peek the next packet line. Until we see EOF keep sending POSTs */ | |
1346 | while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) { | |
1347 | if (proxy_request(&p)) { | |
1348 | /* We would have an err here */ | |
1349 | break; | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | proxy_state_clear(&p); | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | int cmd_main(int argc, const char **argv) | |
1358 | { | |
1359 | struct strbuf buf = STRBUF_INIT; | |
1360 | int nongit; | |
1361 | ||
1362 | setup_git_directory_gently(&nongit); | |
1363 | if (argc < 2) { | |
1364 | error("remote-curl: usage: git remote-curl <remote> [<url>]"); | |
1365 | return 1; | |
1366 | } | |
1367 | ||
1368 | options.verbosity = 1; | |
1369 | options.progress = !!isatty(2); | |
1370 | options.thin = 1; | |
1371 | string_list_init(&options.deepen_not, 1); | |
1372 | string_list_init(&options.push_options, 1); | |
1373 | ||
1374 | remote = remote_get(argv[1]); | |
1375 | ||
1376 | if (argc > 2) { | |
1377 | end_url_with_slash(&url, argv[2]); | |
1378 | } else { | |
1379 | end_url_with_slash(&url, remote->url[0]); | |
1380 | } | |
1381 | ||
1382 | http_init(remote, url.buf, 0); | |
1383 | ||
1384 | do { | |
1385 | const char *arg; | |
1386 | ||
1387 | if (strbuf_getline_lf(&buf, stdin) == EOF) { | |
1388 | if (ferror(stdin)) | |
1389 | error("remote-curl: error reading command stream from git"); | |
1390 | return 1; | |
1391 | } | |
1392 | if (buf.len == 0) | |
1393 | break; | |
1394 | if (starts_with(buf.buf, "fetch ")) { | |
1395 | if (nongit) | |
1396 | die("remote-curl: fetch attempted without a local repo"); | |
1397 | parse_fetch(&buf); | |
1398 | ||
1399 | } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) { | |
1400 | int for_push = !!strstr(buf.buf + 4, "for-push"); | |
1401 | output_refs(get_refs(for_push)); | |
1402 | ||
1403 | } else if (starts_with(buf.buf, "push ")) { | |
1404 | parse_push(&buf); | |
1405 | ||
1406 | } else if (skip_prefix(buf.buf, "option ", &arg)) { | |
1407 | char *value = strchr(arg, ' '); | |
1408 | int result; | |
1409 | ||
1410 | if (value) | |
1411 | *value++ = '\0'; | |
1412 | else | |
1413 | value = "true"; | |
1414 | ||
1415 | result = set_option(arg, value); | |
1416 | if (!result) | |
1417 | printf("ok\n"); | |
1418 | else if (result < 0) | |
1419 | printf("error invalid value\n"); | |
1420 | else | |
1421 | printf("unsupported\n"); | |
1422 | fflush(stdout); | |
1423 | ||
1424 | } else if (!strcmp(buf.buf, "capabilities")) { | |
1425 | printf("stateless-connect\n"); | |
1426 | printf("fetch\n"); | |
1427 | printf("option\n"); | |
1428 | printf("push\n"); | |
1429 | printf("check-connectivity\n"); | |
1430 | printf("\n"); | |
1431 | fflush(stdout); | |
1432 | } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) { | |
1433 | if (!stateless_connect(arg)) | |
1434 | break; | |
1435 | } else { | |
1436 | error("remote-curl: unknown command '%s' from git", buf.buf); | |
1437 | return 1; | |
1438 | } | |
1439 | strbuf_reset(&buf); | |
1440 | } while (1); | |
1441 | ||
1442 | http_cleanup(); | |
1443 | ||
1444 | return 0; | |
1445 | } |