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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "refs.h" | |
4 | #include "pkt-line.h" | |
5 | #include "object.h" | |
6 | #include "tag.h" | |
7 | #include "exec_cmd.h" | |
8 | #include "run-command.h" | |
9 | #include "string-list.h" | |
10 | #include "url.h" | |
11 | #include "argv-array.h" | |
12 | ||
13 | static const char content_type[] = "Content-Type"; | |
14 | static const char content_length[] = "Content-Length"; | |
15 | static const char last_modified[] = "Last-Modified"; | |
16 | static int getanyfile = 1; | |
17 | static unsigned long max_request_buffer = 10 * 1024 * 1024; | |
18 | ||
19 | static struct string_list *query_params; | |
20 | ||
21 | struct rpc_service { | |
22 | const char *name; | |
23 | const char *config_name; | |
24 | unsigned buffer_input : 1; | |
25 | signed enabled : 2; | |
26 | }; | |
27 | ||
28 | static struct rpc_service rpc_service[] = { | |
29 | { "upload-pack", "uploadpack", 1, 1 }, | |
30 | { "receive-pack", "receivepack", 0, -1 }, | |
31 | }; | |
32 | ||
33 | static struct string_list *get_parameters(void) | |
34 | { | |
35 | if (!query_params) { | |
36 | const char *query = getenv("QUERY_STRING"); | |
37 | ||
38 | query_params = xcalloc(1, sizeof(*query_params)); | |
39 | while (query && *query) { | |
40 | char *name = url_decode_parameter_name(&query); | |
41 | char *value = url_decode_parameter_value(&query); | |
42 | struct string_list_item *i; | |
43 | ||
44 | i = string_list_lookup(query_params, name); | |
45 | if (!i) | |
46 | i = string_list_insert(query_params, name); | |
47 | else | |
48 | free(i->util); | |
49 | i->util = value; | |
50 | } | |
51 | } | |
52 | return query_params; | |
53 | } | |
54 | ||
55 | static const char *get_parameter(const char *name) | |
56 | { | |
57 | struct string_list_item *i; | |
58 | i = string_list_lookup(get_parameters(), name); | |
59 | return i ? i->util : NULL; | |
60 | } | |
61 | ||
62 | __attribute__((format (printf, 2, 3))) | |
63 | static void format_write(int fd, const char *fmt, ...) | |
64 | { | |
65 | static char buffer[1024]; | |
66 | ||
67 | va_list args; | |
68 | unsigned n; | |
69 | ||
70 | va_start(args, fmt); | |
71 | n = vsnprintf(buffer, sizeof(buffer), fmt, args); | |
72 | va_end(args); | |
73 | if (n >= sizeof(buffer)) | |
74 | die("protocol error: impossibly long line"); | |
75 | ||
76 | write_or_die(fd, buffer, n); | |
77 | } | |
78 | ||
79 | static void http_status(struct strbuf *hdr, unsigned code, const char *msg) | |
80 | { | |
81 | strbuf_addf(hdr, "Status: %u %s\r\n", code, msg); | |
82 | } | |
83 | ||
84 | static void hdr_str(struct strbuf *hdr, const char *name, const char *value) | |
85 | { | |
86 | strbuf_addf(hdr, "%s: %s\r\n", name, value); | |
87 | } | |
88 | ||
89 | static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value) | |
90 | { | |
91 | strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value); | |
92 | } | |
93 | ||
94 | static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when) | |
95 | { | |
96 | const char *value = show_date(when, 0, DATE_MODE(RFC2822)); | |
97 | hdr_str(hdr, name, value); | |
98 | } | |
99 | ||
100 | static void hdr_nocache(struct strbuf *hdr) | |
101 | { | |
102 | hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT"); | |
103 | hdr_str(hdr, "Pragma", "no-cache"); | |
104 | hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate"); | |
105 | } | |
106 | ||
107 | static void hdr_cache_forever(struct strbuf *hdr) | |
108 | { | |
109 | timestamp_t now = time(NULL); | |
110 | hdr_date(hdr, "Date", now); | |
111 | hdr_date(hdr, "Expires", now + 31536000); | |
112 | hdr_str(hdr, "Cache-Control", "public, max-age=31536000"); | |
113 | } | |
114 | ||
115 | static void end_headers(struct strbuf *hdr) | |
116 | { | |
117 | strbuf_add(hdr, "\r\n", 2); | |
118 | write_or_die(1, hdr->buf, hdr->len); | |
119 | strbuf_release(hdr); | |
120 | } | |
121 | ||
122 | __attribute__((format (printf, 2, 3))) | |
123 | static NORETURN void not_found(struct strbuf *hdr, const char *err, ...) | |
124 | { | |
125 | va_list params; | |
126 | ||
127 | http_status(hdr, 404, "Not Found"); | |
128 | hdr_nocache(hdr); | |
129 | end_headers(hdr); | |
130 | ||
131 | va_start(params, err); | |
132 | if (err && *err) | |
133 | vfprintf(stderr, err, params); | |
134 | va_end(params); | |
135 | exit(0); | |
136 | } | |
137 | ||
138 | __attribute__((format (printf, 2, 3))) | |
139 | static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...) | |
140 | { | |
141 | va_list params; | |
142 | ||
143 | http_status(hdr, 403, "Forbidden"); | |
144 | hdr_nocache(hdr); | |
145 | end_headers(hdr); | |
146 | ||
147 | va_start(params, err); | |
148 | if (err && *err) | |
149 | vfprintf(stderr, err, params); | |
150 | va_end(params); | |
151 | exit(0); | |
152 | } | |
153 | ||
154 | static void select_getanyfile(struct strbuf *hdr) | |
155 | { | |
156 | if (!getanyfile) | |
157 | forbidden(hdr, "Unsupported service: getanyfile"); | |
158 | } | |
159 | ||
160 | static void send_strbuf(struct strbuf *hdr, | |
161 | const char *type, struct strbuf *buf) | |
162 | { | |
163 | hdr_int(hdr, content_length, buf->len); | |
164 | hdr_str(hdr, content_type, type); | |
165 | end_headers(hdr); | |
166 | write_or_die(1, buf->buf, buf->len); | |
167 | } | |
168 | ||
169 | static void send_local_file(struct strbuf *hdr, const char *the_type, | |
170 | const char *name) | |
171 | { | |
172 | char *p = git_pathdup("%s", name); | |
173 | size_t buf_alloc = 8192; | |
174 | char *buf = xmalloc(buf_alloc); | |
175 | int fd; | |
176 | struct stat sb; | |
177 | ||
178 | fd = open(p, O_RDONLY); | |
179 | if (fd < 0) | |
180 | not_found(hdr, "Cannot open '%s': %s", p, strerror(errno)); | |
181 | if (fstat(fd, &sb) < 0) | |
182 | die_errno("Cannot stat '%s'", p); | |
183 | ||
184 | hdr_int(hdr, content_length, sb.st_size); | |
185 | hdr_str(hdr, content_type, the_type); | |
186 | hdr_date(hdr, last_modified, sb.st_mtime); | |
187 | end_headers(hdr); | |
188 | ||
189 | for (;;) { | |
190 | ssize_t n = xread(fd, buf, buf_alloc); | |
191 | if (n < 0) | |
192 | die_errno("Cannot read '%s'", p); | |
193 | if (!n) | |
194 | break; | |
195 | write_or_die(1, buf, n); | |
196 | } | |
197 | close(fd); | |
198 | free(buf); | |
199 | free(p); | |
200 | } | |
201 | ||
202 | static void get_text_file(struct strbuf *hdr, char *name) | |
203 | { | |
204 | select_getanyfile(hdr); | |
205 | hdr_nocache(hdr); | |
206 | send_local_file(hdr, "text/plain", name); | |
207 | } | |
208 | ||
209 | static void get_loose_object(struct strbuf *hdr, char *name) | |
210 | { | |
211 | select_getanyfile(hdr); | |
212 | hdr_cache_forever(hdr); | |
213 | send_local_file(hdr, "application/x-git-loose-object", name); | |
214 | } | |
215 | ||
216 | static void get_pack_file(struct strbuf *hdr, char *name) | |
217 | { | |
218 | select_getanyfile(hdr); | |
219 | hdr_cache_forever(hdr); | |
220 | send_local_file(hdr, "application/x-git-packed-objects", name); | |
221 | } | |
222 | ||
223 | static void get_idx_file(struct strbuf *hdr, char *name) | |
224 | { | |
225 | select_getanyfile(hdr); | |
226 | hdr_cache_forever(hdr); | |
227 | send_local_file(hdr, "application/x-git-packed-objects-toc", name); | |
228 | } | |
229 | ||
230 | static void http_config(void) | |
231 | { | |
232 | int i, value = 0; | |
233 | struct strbuf var = STRBUF_INIT; | |
234 | ||
235 | git_config_get_bool("http.getanyfile", &getanyfile); | |
236 | git_config_get_ulong("http.maxrequestbuffer", &max_request_buffer); | |
237 | ||
238 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { | |
239 | struct rpc_service *svc = &rpc_service[i]; | |
240 | strbuf_addf(&var, "http.%s", svc->config_name); | |
241 | if (!git_config_get_bool(var.buf, &value)) | |
242 | svc->enabled = value; | |
243 | strbuf_reset(&var); | |
244 | } | |
245 | ||
246 | strbuf_release(&var); | |
247 | } | |
248 | ||
249 | static struct rpc_service *select_service(struct strbuf *hdr, const char *name) | |
250 | { | |
251 | const char *svc_name; | |
252 | struct rpc_service *svc = NULL; | |
253 | int i; | |
254 | ||
255 | if (!skip_prefix(name, "git-", &svc_name)) | |
256 | forbidden(hdr, "Unsupported service: '%s'", name); | |
257 | ||
258 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { | |
259 | struct rpc_service *s = &rpc_service[i]; | |
260 | if (!strcmp(s->name, svc_name)) { | |
261 | svc = s; | |
262 | break; | |
263 | } | |
264 | } | |
265 | ||
266 | if (!svc) | |
267 | forbidden(hdr, "Unsupported service: '%s'", name); | |
268 | ||
269 | if (svc->enabled < 0) { | |
270 | const char *user = getenv("REMOTE_USER"); | |
271 | svc->enabled = (user && *user) ? 1 : 0; | |
272 | } | |
273 | if (!svc->enabled) | |
274 | forbidden(hdr, "Service not enabled: '%s'", svc->name); | |
275 | return svc; | |
276 | } | |
277 | ||
278 | /* | |
279 | * This is basically strbuf_read(), except that if we | |
280 | * hit max_request_buffer we die (we'd rather reject a | |
281 | * maliciously large request than chew up infinite memory). | |
282 | */ | |
283 | static ssize_t read_request(int fd, unsigned char **out) | |
284 | { | |
285 | size_t len = 0, alloc = 8192; | |
286 | unsigned char *buf = xmalloc(alloc); | |
287 | ||
288 | if (max_request_buffer < alloc) | |
289 | max_request_buffer = alloc; | |
290 | ||
291 | while (1) { | |
292 | ssize_t cnt; | |
293 | ||
294 | cnt = read_in_full(fd, buf + len, alloc - len); | |
295 | if (cnt < 0) { | |
296 | free(buf); | |
297 | return -1; | |
298 | } | |
299 | ||
300 | /* partial read from read_in_full means we hit EOF */ | |
301 | len += cnt; | |
302 | if (len < alloc) { | |
303 | *out = buf; | |
304 | return len; | |
305 | } | |
306 | ||
307 | /* otherwise, grow and try again (if we can) */ | |
308 | if (alloc == max_request_buffer) | |
309 | die("request was larger than our maximum size (%lu);" | |
310 | " try setting GIT_HTTP_MAX_REQUEST_BUFFER", | |
311 | max_request_buffer); | |
312 | ||
313 | alloc = alloc_nr(alloc); | |
314 | if (alloc > max_request_buffer) | |
315 | alloc = max_request_buffer; | |
316 | REALLOC_ARRAY(buf, alloc); | |
317 | } | |
318 | } | |
319 | ||
320 | static void inflate_request(const char *prog_name, int out, int buffer_input) | |
321 | { | |
322 | git_zstream stream; | |
323 | unsigned char *full_request = NULL; | |
324 | unsigned char in_buf[8192]; | |
325 | unsigned char out_buf[8192]; | |
326 | unsigned long cnt = 0; | |
327 | ||
328 | memset(&stream, 0, sizeof(stream)); | |
329 | git_inflate_init_gzip_only(&stream); | |
330 | ||
331 | while (1) { | |
332 | ssize_t n; | |
333 | ||
334 | if (buffer_input) { | |
335 | if (full_request) | |
336 | n = 0; /* nothing left to read */ | |
337 | else | |
338 | n = read_request(0, &full_request); | |
339 | stream.next_in = full_request; | |
340 | } else { | |
341 | n = xread(0, in_buf, sizeof(in_buf)); | |
342 | stream.next_in = in_buf; | |
343 | } | |
344 | ||
345 | if (n <= 0) | |
346 | die("request ended in the middle of the gzip stream"); | |
347 | stream.avail_in = n; | |
348 | ||
349 | while (0 < stream.avail_in) { | |
350 | int ret; | |
351 | ||
352 | stream.next_out = out_buf; | |
353 | stream.avail_out = sizeof(out_buf); | |
354 | ||
355 | ret = git_inflate(&stream, Z_NO_FLUSH); | |
356 | if (ret != Z_OK && ret != Z_STREAM_END) | |
357 | die("zlib error inflating request, result %d", ret); | |
358 | ||
359 | n = stream.total_out - cnt; | |
360 | if (write_in_full(out, out_buf, n) < 0) | |
361 | die("%s aborted reading request", prog_name); | |
362 | cnt += n; | |
363 | ||
364 | if (ret == Z_STREAM_END) | |
365 | goto done; | |
366 | } | |
367 | } | |
368 | ||
369 | done: | |
370 | git_inflate_end(&stream); | |
371 | close(out); | |
372 | free(full_request); | |
373 | } | |
374 | ||
375 | static void copy_request(const char *prog_name, int out) | |
376 | { | |
377 | unsigned char *buf; | |
378 | ssize_t n = read_request(0, &buf); | |
379 | if (n < 0) | |
380 | die_errno("error reading request body"); | |
381 | if (write_in_full(out, buf, n) < 0) | |
382 | die("%s aborted reading request", prog_name); | |
383 | close(out); | |
384 | free(buf); | |
385 | } | |
386 | ||
387 | static void run_service(const char **argv, int buffer_input) | |
388 | { | |
389 | const char *encoding = getenv("HTTP_CONTENT_ENCODING"); | |
390 | const char *user = getenv("REMOTE_USER"); | |
391 | const char *host = getenv("REMOTE_ADDR"); | |
392 | int gzipped_request = 0; | |
393 | struct child_process cld = CHILD_PROCESS_INIT; | |
394 | ||
395 | if (encoding && !strcmp(encoding, "gzip")) | |
396 | gzipped_request = 1; | |
397 | else if (encoding && !strcmp(encoding, "x-gzip")) | |
398 | gzipped_request = 1; | |
399 | ||
400 | if (!user || !*user) | |
401 | user = "anonymous"; | |
402 | if (!host || !*host) | |
403 | host = "(none)"; | |
404 | ||
405 | if (!getenv("GIT_COMMITTER_NAME")) | |
406 | argv_array_pushf(&cld.env_array, "GIT_COMMITTER_NAME=%s", user); | |
407 | if (!getenv("GIT_COMMITTER_EMAIL")) | |
408 | argv_array_pushf(&cld.env_array, | |
409 | "GIT_COMMITTER_EMAIL=%s@http.%s", user, host); | |
410 | ||
411 | cld.argv = argv; | |
412 | if (buffer_input || gzipped_request) | |
413 | cld.in = -1; | |
414 | cld.git_cmd = 1; | |
415 | if (start_command(&cld)) | |
416 | exit(1); | |
417 | ||
418 | close(1); | |
419 | if (gzipped_request) | |
420 | inflate_request(argv[0], cld.in, buffer_input); | |
421 | else if (buffer_input) | |
422 | copy_request(argv[0], cld.in); | |
423 | else | |
424 | close(0); | |
425 | ||
426 | if (finish_command(&cld)) | |
427 | exit(1); | |
428 | } | |
429 | ||
430 | static int show_text_ref(const char *name, const struct object_id *oid, | |
431 | int flag, void *cb_data) | |
432 | { | |
433 | const char *name_nons = strip_namespace(name); | |
434 | struct strbuf *buf = cb_data; | |
435 | struct object *o = parse_object(oid); | |
436 | if (!o) | |
437 | return 0; | |
438 | ||
439 | strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons); | |
440 | if (o->type == OBJ_TAG) { | |
441 | o = deref_tag(o, name, 0); | |
442 | if (!o) | |
443 | return 0; | |
444 | strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid), | |
445 | name_nons); | |
446 | } | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static void get_info_refs(struct strbuf *hdr, char *arg) | |
451 | { | |
452 | const char *service_name = get_parameter("service"); | |
453 | struct strbuf buf = STRBUF_INIT; | |
454 | ||
455 | hdr_nocache(hdr); | |
456 | ||
457 | if (service_name) { | |
458 | const char *argv[] = {NULL /* service name */, | |
459 | "--stateless-rpc", "--advertise-refs", | |
460 | ".", NULL}; | |
461 | struct rpc_service *svc = select_service(hdr, service_name); | |
462 | ||
463 | strbuf_addf(&buf, "application/x-git-%s-advertisement", | |
464 | svc->name); | |
465 | hdr_str(hdr, content_type, buf.buf); | |
466 | end_headers(hdr); | |
467 | ||
468 | packet_write_fmt(1, "# service=git-%s\n", svc->name); | |
469 | packet_flush(1); | |
470 | ||
471 | argv[0] = svc->name; | |
472 | run_service(argv, 0); | |
473 | ||
474 | } else { | |
475 | select_getanyfile(hdr); | |
476 | for_each_namespaced_ref(show_text_ref, &buf); | |
477 | send_strbuf(hdr, "text/plain", &buf); | |
478 | } | |
479 | strbuf_release(&buf); | |
480 | } | |
481 | ||
482 | static int show_head_ref(const char *refname, const struct object_id *oid, | |
483 | int flag, void *cb_data) | |
484 | { | |
485 | struct strbuf *buf = cb_data; | |
486 | ||
487 | if (flag & REF_ISSYMREF) { | |
488 | struct object_id unused; | |
489 | const char *target = resolve_ref_unsafe(refname, | |
490 | RESOLVE_REF_READING, | |
491 | unused.hash, NULL); | |
492 | ||
493 | if (target) | |
494 | strbuf_addf(buf, "ref: %s\n", strip_namespace(target)); | |
495 | } else { | |
496 | strbuf_addf(buf, "%s\n", oid_to_hex(oid)); | |
497 | } | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | static void get_head(struct strbuf *hdr, char *arg) | |
503 | { | |
504 | struct strbuf buf = STRBUF_INIT; | |
505 | ||
506 | select_getanyfile(hdr); | |
507 | head_ref_namespaced(show_head_ref, &buf); | |
508 | send_strbuf(hdr, "text/plain", &buf); | |
509 | strbuf_release(&buf); | |
510 | } | |
511 | ||
512 | static void get_info_packs(struct strbuf *hdr, char *arg) | |
513 | { | |
514 | size_t objdirlen = strlen(get_object_directory()); | |
515 | struct strbuf buf = STRBUF_INIT; | |
516 | struct packed_git *p; | |
517 | size_t cnt = 0; | |
518 | ||
519 | select_getanyfile(hdr); | |
520 | prepare_packed_git(); | |
521 | for (p = packed_git; p; p = p->next) { | |
522 | if (p->pack_local) | |
523 | cnt++; | |
524 | } | |
525 | ||
526 | strbuf_grow(&buf, cnt * 53 + 2); | |
527 | for (p = packed_git; p; p = p->next) { | |
528 | if (p->pack_local) | |
529 | strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6); | |
530 | } | |
531 | strbuf_addch(&buf, '\n'); | |
532 | ||
533 | hdr_nocache(hdr); | |
534 | send_strbuf(hdr, "text/plain; charset=utf-8", &buf); | |
535 | strbuf_release(&buf); | |
536 | } | |
537 | ||
538 | static void check_content_type(struct strbuf *hdr, const char *accepted_type) | |
539 | { | |
540 | const char *actual_type = getenv("CONTENT_TYPE"); | |
541 | ||
542 | if (!actual_type) | |
543 | actual_type = ""; | |
544 | ||
545 | if (strcmp(actual_type, accepted_type)) { | |
546 | http_status(hdr, 415, "Unsupported Media Type"); | |
547 | hdr_nocache(hdr); | |
548 | end_headers(hdr); | |
549 | format_write(1, | |
550 | "Expected POST with Content-Type '%s'," | |
551 | " but received '%s' instead.\n", | |
552 | accepted_type, actual_type); | |
553 | exit(0); | |
554 | } | |
555 | } | |
556 | ||
557 | static void service_rpc(struct strbuf *hdr, char *service_name) | |
558 | { | |
559 | const char *argv[] = {NULL, "--stateless-rpc", ".", NULL}; | |
560 | struct rpc_service *svc = select_service(hdr, service_name); | |
561 | struct strbuf buf = STRBUF_INIT; | |
562 | ||
563 | strbuf_reset(&buf); | |
564 | strbuf_addf(&buf, "application/x-git-%s-request", svc->name); | |
565 | check_content_type(hdr, buf.buf); | |
566 | ||
567 | hdr_nocache(hdr); | |
568 | ||
569 | strbuf_reset(&buf); | |
570 | strbuf_addf(&buf, "application/x-git-%s-result", svc->name); | |
571 | hdr_str(hdr, content_type, buf.buf); | |
572 | ||
573 | end_headers(hdr); | |
574 | ||
575 | argv[0] = svc->name; | |
576 | run_service(argv, svc->buffer_input); | |
577 | strbuf_release(&buf); | |
578 | } | |
579 | ||
580 | static int dead; | |
581 | static NORETURN void die_webcgi(const char *err, va_list params) | |
582 | { | |
583 | if (dead <= 1) { | |
584 | struct strbuf hdr = STRBUF_INIT; | |
585 | ||
586 | vreportf("fatal: ", err, params); | |
587 | ||
588 | http_status(&hdr, 500, "Internal Server Error"); | |
589 | hdr_nocache(&hdr); | |
590 | end_headers(&hdr); | |
591 | } | |
592 | exit(0); /* we successfully reported a failure ;-) */ | |
593 | } | |
594 | ||
595 | static int die_webcgi_recursing(void) | |
596 | { | |
597 | return dead++ > 1; | |
598 | } | |
599 | ||
600 | static char* getdir(void) | |
601 | { | |
602 | struct strbuf buf = STRBUF_INIT; | |
603 | char *pathinfo = getenv("PATH_INFO"); | |
604 | char *root = getenv("GIT_PROJECT_ROOT"); | |
605 | char *path = getenv("PATH_TRANSLATED"); | |
606 | ||
607 | if (root && *root) { | |
608 | if (!pathinfo || !*pathinfo) | |
609 | die("GIT_PROJECT_ROOT is set but PATH_INFO is not"); | |
610 | if (daemon_avoid_alias(pathinfo)) | |
611 | die("'%s': aliased", pathinfo); | |
612 | end_url_with_slash(&buf, root); | |
613 | if (pathinfo[0] == '/') | |
614 | pathinfo++; | |
615 | strbuf_addstr(&buf, pathinfo); | |
616 | return strbuf_detach(&buf, NULL); | |
617 | } else if (path && *path) { | |
618 | return xstrdup(path); | |
619 | } else | |
620 | die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server"); | |
621 | return NULL; | |
622 | } | |
623 | ||
624 | static struct service_cmd { | |
625 | const char *method; | |
626 | const char *pattern; | |
627 | void (*imp)(struct strbuf *, char *); | |
628 | } services[] = { | |
629 | {"GET", "/HEAD$", get_head}, | |
630 | {"GET", "/info/refs$", get_info_refs}, | |
631 | {"GET", "/objects/info/alternates$", get_text_file}, | |
632 | {"GET", "/objects/info/http-alternates$", get_text_file}, | |
633 | {"GET", "/objects/info/packs$", get_info_packs}, | |
634 | {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object}, | |
635 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file}, | |
636 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file}, | |
637 | ||
638 | {"POST", "/git-upload-pack$", service_rpc}, | |
639 | {"POST", "/git-receive-pack$", service_rpc} | |
640 | }; | |
641 | ||
642 | static int bad_request(struct strbuf *hdr, const struct service_cmd *c) | |
643 | { | |
644 | const char *proto = getenv("SERVER_PROTOCOL"); | |
645 | ||
646 | if (proto && !strcmp(proto, "HTTP/1.1")) { | |
647 | http_status(hdr, 405, "Method Not Allowed"); | |
648 | hdr_str(hdr, "Allow", | |
649 | !strcmp(c->method, "GET") ? "GET, HEAD" : c->method); | |
650 | } else | |
651 | http_status(hdr, 400, "Bad Request"); | |
652 | hdr_nocache(hdr); | |
653 | end_headers(hdr); | |
654 | return 0; | |
655 | } | |
656 | ||
657 | int cmd_main(int argc, const char **argv) | |
658 | { | |
659 | char *method = getenv("REQUEST_METHOD"); | |
660 | char *dir; | |
661 | struct service_cmd *cmd = NULL; | |
662 | char *cmd_arg = NULL; | |
663 | int i; | |
664 | struct strbuf hdr = STRBUF_INIT; | |
665 | ||
666 | set_die_routine(die_webcgi); | |
667 | set_die_is_recursing_routine(die_webcgi_recursing); | |
668 | ||
669 | if (!method) | |
670 | die("No REQUEST_METHOD from server"); | |
671 | if (!strcmp(method, "HEAD")) | |
672 | method = "GET"; | |
673 | dir = getdir(); | |
674 | ||
675 | for (i = 0; i < ARRAY_SIZE(services); i++) { | |
676 | struct service_cmd *c = &services[i]; | |
677 | regex_t re; | |
678 | regmatch_t out[1]; | |
679 | ||
680 | if (regcomp(&re, c->pattern, REG_EXTENDED)) | |
681 | die("Bogus regex in service table: %s", c->pattern); | |
682 | if (!regexec(&re, dir, 1, out, 0)) { | |
683 | size_t n; | |
684 | ||
685 | if (strcmp(method, c->method)) | |
686 | return bad_request(&hdr, c); | |
687 | ||
688 | cmd = c; | |
689 | n = out[0].rm_eo - out[0].rm_so; | |
690 | cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1); | |
691 | dir[out[0].rm_so] = 0; | |
692 | break; | |
693 | } | |
694 | regfree(&re); | |
695 | } | |
696 | ||
697 | if (!cmd) | |
698 | not_found(&hdr, "Request not supported: '%s'", dir); | |
699 | ||
700 | setup_path(); | |
701 | if (!enter_repo(dir, 0)) | |
702 | not_found(&hdr, "Not a git repository: '%s'", dir); | |
703 | if (!getenv("GIT_HTTP_EXPORT_ALL") && | |
704 | access("git-daemon-export-ok", F_OK) ) | |
705 | not_found(&hdr, "Repository not exported: '%s'", dir); | |
706 | ||
707 | http_config(); | |
708 | max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER", | |
709 | max_request_buffer); | |
710 | ||
711 | cmd->imp(&hdr, cmd_arg); | |
712 | return 0; | |
713 | } |