freshlybakedca.ke
Git fork
1#define USE_THE_REPOSITORY_VARIABLE
2#define DISABLE_SIGN_COMPARE_WARNINGS
3
4#include "git-compat-util.h"
5#include "config.h"
6#include "environment.h"
7#include "git-zlib.h"
8#include "hex.h"
9#include "path.h"
10#include "repository.h"
11#include "refs.h"
12#include "pkt-line.h"
13#include "object.h"
14#include "tag.h"
15#include "exec-cmd.h"
16#include "run-command.h"
17#include "string-list.h"
18#include "url.h"
19#include "strvec.h"
20#include "packfile.h"
21#include "odb.h"
22#include "protocol.h"
23#include "date.h"
24#include "write-or-die.h"
25
26static const char content_type[] = "Content-Type";
27static const char content_length[] = "Content-Length";
28static const char last_modified[] = "Last-Modified";
29static int getanyfile = 1;
30static unsigned long max_request_buffer = 10 * 1024 * 1024;
31
32static struct string_list *query_params;
33
34struct rpc_service {
35 const char *name;
36 const char *config_name;
37 unsigned buffer_input : 1;
38 signed enabled : 2;
39};
40
41static struct rpc_service rpc_service[] = {
42 { "upload-pack", "uploadpack", 1, 1 },
43 { "receive-pack", "receivepack", 0, -1 },
44 { "upload-archive", "uploadarchive", 0, -1 },
45};
46
47static struct string_list *get_parameters(void)
48{
49 if (!query_params) {
50 const char *query = getenv("QUERY_STRING");
51
52 CALLOC_ARRAY(query_params, 1);
53 while (query && *query) {
54 char *name = url_decode_parameter_name(&query);
55 char *value = url_decode_parameter_value(&query);
56 struct string_list_item *i;
57
58 i = string_list_lookup(query_params, name);
59 if (!i)
60 i = string_list_insert(query_params, name);
61 else
62 free(i->util);
63 i->util = value;
64 }
65 }
66 return query_params;
67}
68
69static const char *get_parameter(const char *name)
70{
71 struct string_list_item *i;
72 i = string_list_lookup(get_parameters(), name);
73 return i ? i->util : NULL;
74}
75
76__attribute__((format (printf, 2, 3)))
77static void format_write(int fd, const char *fmt, ...)
78{
79 static char buffer[1024];
80
81 va_list args;
82 unsigned n;
83
84 va_start(args, fmt);
85 n = vsnprintf(buffer, sizeof(buffer), fmt, args);
86 va_end(args);
87 if (n >= sizeof(buffer))
88 die("protocol error: impossibly long line");
89
90 write_or_die(fd, buffer, n);
91}
92
93static void http_status(struct strbuf *hdr, unsigned code, const char *msg)
94{
95 strbuf_addf(hdr, "Status: %u %s\r\n", code, msg);
96}
97
98static void hdr_str(struct strbuf *hdr, const char *name, const char *value)
99{
100 strbuf_addf(hdr, "%s: %s\r\n", name, value);
101}
102
103static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value)
104{
105 strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value);
106}
107
108static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when)
109{
110 const char *value = show_date(when, 0, DATE_MODE(RFC2822));
111 hdr_str(hdr, name, value);
112}
113
114static void hdr_nocache(struct strbuf *hdr)
115{
116 hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
117 hdr_str(hdr, "Pragma", "no-cache");
118 hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate");
119}
120
121static void hdr_cache_forever(struct strbuf *hdr)
122{
123 timestamp_t now = time(NULL);
124 hdr_date(hdr, "Date", now);
125 hdr_date(hdr, "Expires", now + 31536000);
126 hdr_str(hdr, "Cache-Control", "public, max-age=31536000");
127}
128
129static void end_headers(struct strbuf *hdr)
130{
131 strbuf_add(hdr, "\r\n", 2);
132 write_or_die(1, hdr->buf, hdr->len);
133 strbuf_release(hdr);
134}
135
136__attribute__((format (printf, 2, 3)))
137static NORETURN void not_found(struct strbuf *hdr, const char *err, ...)
138{
139 va_list params;
140
141 http_status(hdr, 404, "Not Found");
142 hdr_nocache(hdr);
143 end_headers(hdr);
144
145 va_start(params, err);
146 if (err && *err)
147 vfprintf(stderr, err, params);
148 va_end(params);
149 exit(0);
150}
151
152__attribute__((format (printf, 2, 3)))
153static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...)
154{
155 va_list params;
156
157 http_status(hdr, 403, "Forbidden");
158 hdr_nocache(hdr);
159 end_headers(hdr);
160
161 va_start(params, err);
162 if (err && *err)
163 vfprintf(stderr, err, params);
164 va_end(params);
165 exit(0);
166}
167
168static void select_getanyfile(struct strbuf *hdr)
169{
170 if (!getanyfile)
171 forbidden(hdr, "Unsupported service: getanyfile");
172}
173
174static void send_strbuf(struct strbuf *hdr,
175 const char *type, struct strbuf *buf)
176{
177 hdr_int(hdr, content_length, buf->len);
178 hdr_str(hdr, content_type, type);
179 end_headers(hdr);
180 write_or_die(1, buf->buf, buf->len);
181}
182
183static void send_local_file(struct strbuf *hdr, const char *the_type,
184 const char *name)
185{
186 char *p = repo_git_path(the_repository, "%s", name);
187 size_t buf_alloc = 8192;
188 char *buf = xmalloc(buf_alloc);
189 int fd;
190 struct stat sb;
191
192 fd = open(p, O_RDONLY);
193 if (fd < 0)
194 not_found(hdr, "Cannot open '%s': %s", p, strerror(errno));
195 if (fstat(fd, &sb) < 0)
196 die_errno("Cannot stat '%s'", p);
197
198 hdr_int(hdr, content_length, sb.st_size);
199 hdr_str(hdr, content_type, the_type);
200 hdr_date(hdr, last_modified, sb.st_mtime);
201 end_headers(hdr);
202
203 for (;;) {
204 ssize_t n = xread(fd, buf, buf_alloc);
205 if (n < 0)
206 die_errno("Cannot read '%s'", p);
207 if (!n)
208 break;
209 write_or_die(1, buf, n);
210 }
211 close(fd);
212 free(buf);
213 free(p);
214}
215
216static void get_text_file(struct strbuf *hdr, char *name)
217{
218 select_getanyfile(hdr);
219 hdr_nocache(hdr);
220 send_local_file(hdr, "text/plain", name);
221}
222
223static void get_loose_object(struct strbuf *hdr, char *name)
224{
225 select_getanyfile(hdr);
226 hdr_cache_forever(hdr);
227 send_local_file(hdr, "application/x-git-loose-object", name);
228}
229
230static void get_pack_file(struct strbuf *hdr, char *name)
231{
232 select_getanyfile(hdr);
233 hdr_cache_forever(hdr);
234 send_local_file(hdr, "application/x-git-packed-objects", name);
235}
236
237static void get_idx_file(struct strbuf *hdr, char *name)
238{
239 select_getanyfile(hdr);
240 hdr_cache_forever(hdr);
241 send_local_file(hdr, "application/x-git-packed-objects-toc", name);
242}
243
244static void http_config(void)
245{
246 int i, value = 0;
247 struct strbuf var = STRBUF_INIT;
248
249 repo_config_get_bool(the_repository, "http.getanyfile", &getanyfile);
250 repo_config_get_ulong(the_repository, "http.maxrequestbuffer", &max_request_buffer);
251
252 for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
253 struct rpc_service *svc = &rpc_service[i];
254 strbuf_addf(&var, "http.%s", svc->config_name);
255 if (!repo_config_get_bool(the_repository, var.buf, &value))
256 svc->enabled = value;
257 strbuf_reset(&var);
258 }
259
260 strbuf_release(&var);
261}
262
263static struct rpc_service *select_service(struct strbuf *hdr, const char *name)
264{
265 const char *svc_name;
266 struct rpc_service *svc = NULL;
267 int i;
268
269 if (!skip_prefix(name, "git-", &svc_name))
270 forbidden(hdr, "Unsupported service: '%s'", name);
271
272 for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
273 struct rpc_service *s = &rpc_service[i];
274 if (!strcmp(s->name, svc_name)) {
275 svc = s;
276 break;
277 }
278 }
279
280 if (!svc)
281 forbidden(hdr, "Unsupported service: '%s'", name);
282
283 if (svc->enabled < 0) {
284 const char *user = getenv("REMOTE_USER");
285 svc->enabled = (user && *user) ? 1 : 0;
286 }
287 if (!svc->enabled)
288 forbidden(hdr, "Service not enabled: '%s'", svc->name);
289 return svc;
290}
291
292static void write_to_child(int out, const unsigned char *buf, ssize_t len, const char *prog_name)
293{
294 if (write_in_full(out, buf, len) < 0)
295 die("unable to write to '%s'", prog_name);
296}
297
298/*
299 * This is basically strbuf_read(), except that if we
300 * hit max_request_buffer we die (we'd rather reject a
301 * maliciously large request than chew up infinite memory).
302 */
303static ssize_t read_request_eof(int fd, unsigned char **out)
304{
305 size_t len = 0, alloc = 8192;
306 unsigned char *buf = xmalloc(alloc);
307
308 if (max_request_buffer < alloc)
309 max_request_buffer = alloc;
310
311 while (1) {
312 ssize_t cnt;
313
314 cnt = read_in_full(fd, buf + len, alloc - len);
315 if (cnt < 0) {
316 free(buf);
317 return -1;
318 }
319
320 /* partial read from read_in_full means we hit EOF */
321 len += cnt;
322 if (len < alloc) {
323 *out = buf;
324 return len;
325 }
326
327 /* otherwise, grow and try again (if we can) */
328 if (alloc == max_request_buffer)
329 die("request was larger than our maximum size (%lu);"
330 " try setting GIT_HTTP_MAX_REQUEST_BUFFER",
331 max_request_buffer);
332
333 alloc = alloc_nr(alloc);
334 if (alloc > max_request_buffer)
335 alloc = max_request_buffer;
336 REALLOC_ARRAY(buf, alloc);
337 }
338}
339
340static ssize_t read_request_fixed_len(int fd, ssize_t req_len, unsigned char **out)
341{
342 unsigned char *buf = NULL;
343 ssize_t cnt = 0;
344
345 if (max_request_buffer < req_len) {
346 die("request was larger than our maximum size (%lu): "
347 "%" PRIuMAX "; try setting GIT_HTTP_MAX_REQUEST_BUFFER",
348 max_request_buffer, (uintmax_t)req_len);
349 }
350
351 buf = xmalloc(req_len);
352 cnt = read_in_full(fd, buf, req_len);
353 if (cnt < 0) {
354 free(buf);
355 return -1;
356 }
357 *out = buf;
358 return cnt;
359}
360
361static ssize_t get_content_length(void)
362{
363 ssize_t val = -1;
364 const char *str = getenv("CONTENT_LENGTH");
365
366 if (str && *str && !git_parse_ssize_t(str, &val))
367 die("failed to parse CONTENT_LENGTH: %s", str);
368 return val;
369}
370
371static ssize_t read_request(int fd, unsigned char **out, ssize_t req_len)
372{
373 if (req_len < 0)
374 return read_request_eof(fd, out);
375 else
376 return read_request_fixed_len(fd, req_len, out);
377}
378
379static void inflate_request(const char *prog_name, int out, int buffer_input, ssize_t req_len)
380{
381 git_zstream stream;
382 unsigned char *full_request = NULL;
383 unsigned char in_buf[8192];
384 unsigned char out_buf[8192];
385 unsigned long cnt = 0;
386 int req_len_defined = req_len >= 0;
387 size_t req_remaining_len = req_len;
388
389 memset(&stream, 0, sizeof(stream));
390 git_inflate_init_gzip_only(&stream);
391
392 while (1) {
393 ssize_t n;
394
395 if (buffer_input) {
396 if (full_request)
397 n = 0; /* nothing left to read */
398 else
399 n = read_request(0, &full_request, req_len);
400 stream.next_in = full_request;
401 } else {
402 ssize_t buffer_len;
403 if (req_len_defined && req_remaining_len <= sizeof(in_buf))
404 buffer_len = req_remaining_len;
405 else
406 buffer_len = sizeof(in_buf);
407 n = xread(0, in_buf, buffer_len);
408 stream.next_in = in_buf;
409 if (req_len_defined && n > 0)
410 req_remaining_len -= n;
411 }
412
413 if (n <= 0)
414 die("request ended in the middle of the gzip stream");
415 stream.avail_in = n;
416
417 while (0 < stream.avail_in) {
418 int ret;
419
420 stream.next_out = out_buf;
421 stream.avail_out = sizeof(out_buf);
422
423 ret = git_inflate(&stream, Z_NO_FLUSH);
424 if (ret != Z_OK && ret != Z_STREAM_END)
425 die("zlib error inflating request, result %d", ret);
426
427 n = stream.total_out - cnt;
428 write_to_child(out, out_buf, stream.total_out - cnt, prog_name);
429 cnt = stream.total_out;
430
431 if (ret == Z_STREAM_END)
432 goto done;
433 }
434 }
435
436done:
437 git_inflate_end(&stream);
438 close(out);
439 free(full_request);
440}
441
442static void copy_request(const char *prog_name, int out, ssize_t req_len)
443{
444 unsigned char *buf;
445 ssize_t n = read_request(0, &buf, req_len);
446 if (n < 0)
447 die_errno("error reading request body");
448 write_to_child(out, buf, n, prog_name);
449 close(out);
450 free(buf);
451}
452
453static void pipe_fixed_length(const char *prog_name, int out, size_t req_len)
454{
455 unsigned char buf[8192];
456 size_t remaining_len = req_len;
457
458 while (remaining_len > 0) {
459 size_t chunk_length = remaining_len > sizeof(buf) ? sizeof(buf) : remaining_len;
460 ssize_t n = xread(0, buf, chunk_length);
461 if (n < 0)
462 die_errno("Reading request failed");
463 write_to_child(out, buf, n, prog_name);
464 remaining_len -= n;
465 }
466
467 close(out);
468}
469
470static void run_service(const char **argv, int buffer_input)
471{
472 const char *encoding = getenv("HTTP_CONTENT_ENCODING");
473 const char *user = getenv("REMOTE_USER");
474 const char *host = getenv("REMOTE_ADDR");
475 int gzipped_request = 0;
476 struct child_process cld = CHILD_PROCESS_INIT;
477 ssize_t req_len = get_content_length();
478
479 if (encoding && (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip")))
480 gzipped_request = 1;
481
482 if (!user || !*user)
483 user = "anonymous";
484 if (!host || !*host)
485 host = "(none)";
486
487 if (!getenv("GIT_COMMITTER_NAME"))
488 strvec_pushf(&cld.env, "GIT_COMMITTER_NAME=%s", user);
489 if (!getenv("GIT_COMMITTER_EMAIL"))
490 strvec_pushf(&cld.env,
491 "GIT_COMMITTER_EMAIL=%s@http.%s", user, host);
492
493 strvec_pushv(&cld.args, argv);
494 if (buffer_input || gzipped_request || req_len >= 0)
495 cld.in = -1;
496 cld.git_cmd = 1;
497 cld.clean_on_exit = 1;
498 cld.wait_after_clean = 1;
499 if (start_command(&cld))
500 exit(1);
501
502 close(1);
503 if (gzipped_request)
504 inflate_request(argv[0], cld.in, buffer_input, req_len);
505 else if (buffer_input)
506 copy_request(argv[0], cld.in, req_len);
507 else if (req_len >= 0)
508 pipe_fixed_length(argv[0], cld.in, req_len);
509 else
510 close(0);
511
512 if (finish_command(&cld))
513 exit(1);
514}
515
516static int show_text_ref(const char *name, const char *referent UNUSED, const struct object_id *oid,
517 int flag UNUSED, void *cb_data)
518{
519 const char *name_nons = strip_namespace(name);
520 struct strbuf *buf = cb_data;
521 struct object *o = parse_object(the_repository, oid);
522 if (!o)
523 return 0;
524
525 strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons);
526 if (o->type == OBJ_TAG) {
527 o = deref_tag(the_repository, o, name, 0);
528 if (!o)
529 return 0;
530 strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid),
531 name_nons);
532 }
533 return 0;
534}
535
536static void get_info_refs(struct strbuf *hdr, char *arg UNUSED)
537{
538 const char *service_name = get_parameter("service");
539 struct strbuf buf = STRBUF_INIT;
540
541 hdr_nocache(hdr);
542
543 if (service_name) {
544 const char *argv[] = {NULL /* service name */,
545 "--http-backend-info-refs",
546 ".", NULL};
547 struct rpc_service *svc = select_service(hdr, service_name);
548
549 strbuf_addf(&buf, "application/x-git-%s-advertisement",
550 svc->name);
551 hdr_str(hdr, content_type, buf.buf);
552 end_headers(hdr);
553
554
555 if (determine_protocol_version_server() != protocol_v2) {
556 packet_write_fmt(1, "# service=git-%s\n", svc->name);
557 packet_flush(1);
558 }
559
560 argv[0] = svc->name;
561 run_service(argv, 0);
562
563 } else {
564 select_getanyfile(hdr);
565 refs_for_each_namespaced_ref(get_main_ref_store(the_repository),
566 NULL, show_text_ref, &buf);
567 send_strbuf(hdr, "text/plain", &buf);
568 }
569 strbuf_release(&buf);
570}
571
572static int show_head_ref(const char *refname, const char *referent UNUSED, const struct object_id *oid,
573 int flag, void *cb_data)
574{
575 struct strbuf *buf = cb_data;
576
577 if (flag & REF_ISSYMREF) {
578 const char *target = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
579 refname,
580 RESOLVE_REF_READING,
581 NULL, NULL);
582
583 if (target)
584 strbuf_addf(buf, "ref: %s\n", strip_namespace(target));
585 } else {
586 strbuf_addf(buf, "%s\n", oid_to_hex(oid));
587 }
588
589 return 0;
590}
591
592static void get_head(struct strbuf *hdr, char *arg UNUSED)
593{
594 struct strbuf buf = STRBUF_INIT;
595
596 select_getanyfile(hdr);
597 refs_head_ref_namespaced(get_main_ref_store(the_repository),
598 show_head_ref, &buf);
599 send_strbuf(hdr, "text/plain", &buf);
600 strbuf_release(&buf);
601}
602
603static void get_info_packs(struct strbuf *hdr, char *arg UNUSED)
604{
605 size_t objdirlen = strlen(repo_get_object_directory(the_repository));
606 struct packfile_store *packs = the_repository->objects->packfiles;
607 struct strbuf buf = STRBUF_INIT;
608 struct packed_git *p;
609 size_t cnt = 0;
610
611 select_getanyfile(hdr);
612 for (p = packfile_store_get_all_packs(packs); p; p = p->next) {
613 if (p->pack_local)
614 cnt++;
615 }
616
617 strbuf_grow(&buf, cnt * 53 + 2);
618 for (p = packfile_store_get_all_packs(packs); p; p = p->next) {
619 if (p->pack_local)
620 strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6);
621 }
622 strbuf_addch(&buf, '\n');
623
624 hdr_nocache(hdr);
625 send_strbuf(hdr, "text/plain; charset=utf-8", &buf);
626 strbuf_release(&buf);
627}
628
629static void check_content_type(struct strbuf *hdr, const char *accepted_type)
630{
631 const char *actual_type = getenv("CONTENT_TYPE");
632
633 if (!actual_type)
634 actual_type = "";
635
636 if (strcmp(actual_type, accepted_type)) {
637 http_status(hdr, 415, "Unsupported Media Type");
638 hdr_nocache(hdr);
639 end_headers(hdr);
640 format_write(1,
641 "Expected POST with Content-Type '%s',"
642 " but received '%s' instead.\n",
643 accepted_type, actual_type);
644 exit(0);
645 }
646}
647
648static void service_rpc(struct strbuf *hdr, char *service_name)
649{
650 struct strvec argv = STRVEC_INIT;
651 struct rpc_service *svc = select_service(hdr, service_name);
652 struct strbuf buf = STRBUF_INIT;
653
654 strvec_push(&argv, svc->name);
655 if (strcmp(service_name, "git-upload-archive"))
656 strvec_push(&argv, "--stateless-rpc");
657 strvec_push(&argv, ".");
658
659 strbuf_reset(&buf);
660 strbuf_addf(&buf, "application/x-git-%s-request", svc->name);
661 check_content_type(hdr, buf.buf);
662
663 hdr_nocache(hdr);
664
665 strbuf_reset(&buf);
666 strbuf_addf(&buf, "application/x-git-%s-result", svc->name);
667 hdr_str(hdr, content_type, buf.buf);
668
669 end_headers(hdr);
670
671 run_service(argv.v, svc->buffer_input);
672 strbuf_release(&buf);
673 strvec_clear(&argv);
674}
675
676static int dead;
677static NORETURN void die_webcgi(const char *err, va_list params)
678{
679 if (dead <= 1) {
680 struct strbuf hdr = STRBUF_INIT;
681 report_fn die_message_fn = get_die_message_routine();
682
683 die_message_fn(err, params);
684
685 http_status(&hdr, 500, "Internal Server Error");
686 hdr_nocache(&hdr);
687 end_headers(&hdr);
688 }
689 exit(0); /* we successfully reported a failure ;-) */
690}
691
692static int die_webcgi_recursing(void)
693{
694 return dead++ > 1;
695}
696
697static char* getdir(void)
698{
699 struct strbuf buf = STRBUF_INIT;
700 char *pathinfo = getenv("PATH_INFO");
701 char *root = getenv("GIT_PROJECT_ROOT");
702 char *path = getenv("PATH_TRANSLATED");
703
704 if (root && *root) {
705 if (!pathinfo || !*pathinfo)
706 die("GIT_PROJECT_ROOT is set but PATH_INFO is not");
707 if (daemon_avoid_alias(pathinfo))
708 die("'%s': aliased", pathinfo);
709 end_url_with_slash(&buf, root);
710 if (pathinfo[0] == '/')
711 pathinfo++;
712 strbuf_addstr(&buf, pathinfo);
713 return strbuf_detach(&buf, NULL);
714 } else if (path && *path) {
715 return xstrdup(path);
716 } else
717 die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server");
718 return NULL;
719}
720
721static struct service_cmd {
722 const char *method;
723 const char *pattern;
724 void (*imp)(struct strbuf *, char *);
725} services[] = {
726 {"GET", "/HEAD$", get_head},
727 {"GET", "/info/refs$", get_info_refs},
728 {"GET", "/objects/info/alternates$", get_text_file},
729 {"GET", "/objects/info/http-alternates$", get_text_file},
730 {"GET", "/objects/info/packs$", get_info_packs},
731 {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object},
732 {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{62}$", get_loose_object},
733 {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file},
734 {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.pack$", get_pack_file},
735 {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file},
736 {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.idx$", get_idx_file},
737
738 {"POST", "/git-upload-pack$", service_rpc},
739 {"POST", "/git-upload-archive$", service_rpc},
740 {"POST", "/git-receive-pack$", service_rpc}
741};
742
743static int bad_request(struct strbuf *hdr, const struct service_cmd *c)
744{
745 const char *proto = getenv("SERVER_PROTOCOL");
746
747 if (proto && !strcmp(proto, "HTTP/1.1")) {
748 http_status(hdr, 405, "Method Not Allowed");
749 hdr_str(hdr, "Allow",
750 !strcmp(c->method, "GET") ? "GET, HEAD" : c->method);
751 } else
752 http_status(hdr, 400, "Bad Request");
753 hdr_nocache(hdr);
754 end_headers(hdr);
755 return 0;
756}
757
758int cmd_main(int argc UNUSED, const char **argv UNUSED)
759{
760 const char *method = getenv("REQUEST_METHOD");
761 const char *proto_header;
762 char *dir;
763 struct service_cmd *cmd = NULL;
764 char *cmd_arg = NULL;
765 int i;
766 struct strbuf hdr = STRBUF_INIT;
767
768 set_die_routine(die_webcgi);
769 set_die_is_recursing_routine(die_webcgi_recursing);
770
771 if (!method)
772 die("No REQUEST_METHOD from server");
773 if (!strcmp(method, "HEAD"))
774 method = "GET";
775 dir = getdir();
776
777 for (i = 0; i < ARRAY_SIZE(services); i++) {
778 struct service_cmd *c = &services[i];
779 regex_t re;
780 regmatch_t out[1];
781 int ret;
782
783 if (regcomp(&re, c->pattern, REG_EXTENDED))
784 die("Bogus regex in service table: %s", c->pattern);
785 ret = regexec(&re, dir, 1, out, 0);
786 regfree(&re);
787
788 if (!ret) {
789 size_t n;
790
791 if (strcmp(method, c->method))
792 return bad_request(&hdr, c);
793
794 cmd = c;
795 n = out[0].rm_eo - out[0].rm_so;
796 cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1);
797 dir[out[0].rm_so] = 0;
798 break;
799 }
800 }
801
802 if (!cmd)
803 not_found(&hdr, "Request not supported: '%s'", dir);
804
805 setup_path();
806 if (!enter_repo(dir, 0))
807 not_found(&hdr, "Not a git repository: '%s'", dir);
808 if (!getenv("GIT_HTTP_EXPORT_ALL") &&
809 access("git-daemon-export-ok", F_OK) )
810 not_found(&hdr, "Repository not exported: '%s'", dir);
811 free(dir);
812
813 http_config();
814 max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER",
815 max_request_buffer);
816 proto_header = getenv("HTTP_GIT_PROTOCOL");
817 if (proto_header)
818 setenv(GIT_PROTOCOL_ENVIRONMENT, proto_header, 0);
819
820 cmd->imp(&hdr, cmd_arg);
821 free(cmd_arg);
822 return 0;
823}