object-store: move packed_git and packed_git_mru to object store
[git/git.git] / http-backend.c
CommitLineData
2f4038ab 1#include "cache.h"
b2141fc1 2#include "config.h"
a80d72db 3#include "repository.h"
2f4038ab
SP
4#include "refs.h"
5#include "pkt-line.h"
6#include "object.h"
7#include "tag.h"
8#include "exec_cmd.h"
556cfa3b
SP
9#include "run-command.h"
10#include "string-list.h"
638794cd 11#include "url.h"
e32a4581 12#include "argv-array.h"
0abe14f6 13#include "packfile.h"
a80d72db 14#include "object-store.h"
2f4038ab
SP
15
16static const char content_type[] = "Content-Type";
17static const char content_length[] = "Content-Length";
18static const char last_modified[] = "Last-Modified";
5abb013b 19static int getanyfile = 1;
6bc0cb51 20static unsigned long max_request_buffer = 10 * 1024 * 1024;
2f4038ab 21
556cfa3b
SP
22static struct string_list *query_params;
23
24struct rpc_service {
25 const char *name;
26 const char *config_name;
6bc0cb51 27 unsigned buffer_input : 1;
556cfa3b
SP
28 signed enabled : 2;
29};
30
31static struct rpc_service rpc_service[] = {
6bc0cb51
JK
32 { "upload-pack", "uploadpack", 1, 1 },
33 { "receive-pack", "receivepack", 0, -1 },
556cfa3b
SP
34};
35
556cfa3b
SP
36static struct string_list *get_parameters(void)
37{
38 if (!query_params) {
39 const char *query = getenv("QUERY_STRING");
40
41 query_params = xcalloc(1, sizeof(*query_params));
42 while (query && *query) {
638794cd
JK
43 char *name = url_decode_parameter_name(&query);
44 char *value = url_decode_parameter_value(&query);
556cfa3b
SP
45 struct string_list_item *i;
46
e8c8b713 47 i = string_list_lookup(query_params, name);
556cfa3b 48 if (!i)
78a395d3 49 i = string_list_insert(query_params, name);
556cfa3b
SP
50 else
51 free(i->util);
52 i->util = value;
53 }
54 }
55 return query_params;
56}
57
58static const char *get_parameter(const char *name)
59{
60 struct string_list_item *i;
e8c8b713 61 i = string_list_lookup(get_parameters(), name);
556cfa3b
SP
62 return i ? i->util : NULL;
63}
64
35487017 65__attribute__((format (printf, 2, 3)))
2f4038ab
SP
66static void format_write(int fd, const char *fmt, ...)
67{
68 static char buffer[1024];
69
70 va_list args;
71 unsigned n;
72
73 va_start(args, fmt);
74 n = vsnprintf(buffer, sizeof(buffer), fmt, args);
75 va_end(args);
76 if (n >= sizeof(buffer))
77 die("protocol error: impossibly long line");
78
cdf4fb8e 79 write_or_die(fd, buffer, n);
2f4038ab
SP
80}
81
b36045c1 82static void http_status(struct strbuf *hdr, unsigned code, const char *msg)
2f4038ab 83{
b36045c1 84 strbuf_addf(hdr, "Status: %u %s\r\n", code, msg);
2f4038ab
SP
85}
86
b36045c1 87static void hdr_str(struct strbuf *hdr, const char *name, const char *value)
2f4038ab 88{
b36045c1 89 strbuf_addf(hdr, "%s: %s\r\n", name, value);
2f4038ab
SP
90}
91
b36045c1 92static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value)
2f4038ab 93{
b36045c1 94 strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value);
2f4038ab
SP
95}
96
dddbad72 97static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when)
2f4038ab 98{
a5481a6c 99 const char *value = show_date(when, 0, DATE_MODE(RFC2822));
b36045c1 100 hdr_str(hdr, name, value);
2f4038ab
SP
101}
102
b36045c1 103static void hdr_nocache(struct strbuf *hdr)
2f4038ab 104{
b36045c1
EW
105 hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
106 hdr_str(hdr, "Pragma", "no-cache");
107 hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate");
2f4038ab
SP
108}
109
b36045c1 110static void hdr_cache_forever(struct strbuf *hdr)
2f4038ab 111{
dddbad72 112 timestamp_t now = time(NULL);
b36045c1
EW
113 hdr_date(hdr, "Date", now);
114 hdr_date(hdr, "Expires", now + 31536000);
115 hdr_str(hdr, "Cache-Control", "public, max-age=31536000");
2f4038ab
SP
116}
117
b36045c1 118static void end_headers(struct strbuf *hdr)
2f4038ab 119{
b36045c1
EW
120 strbuf_add(hdr, "\r\n", 2);
121 write_or_die(1, hdr->buf, hdr->len);
122 strbuf_release(hdr);
2f4038ab
SP
123}
124
b36045c1
EW
125__attribute__((format (printf, 2, 3)))
126static NORETURN void not_found(struct strbuf *hdr, const char *err, ...)
2f4038ab
SP
127{
128 va_list params;
129
b36045c1
EW
130 http_status(hdr, 404, "Not Found");
131 hdr_nocache(hdr);
132 end_headers(hdr);
2f4038ab
SP
133
134 va_start(params, err);
135 if (err && *err)
136 vfprintf(stderr, err, params);
137 va_end(params);
138 exit(0);
139}
140
b36045c1
EW
141__attribute__((format (printf, 2, 3)))
142static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...)
556cfa3b
SP
143{
144 va_list params;
145
b36045c1
EW
146 http_status(hdr, 403, "Forbidden");
147 hdr_nocache(hdr);
148 end_headers(hdr);
556cfa3b
SP
149
150 va_start(params, err);
151 if (err && *err)
152 vfprintf(stderr, err, params);
153 va_end(params);
154 exit(0);
155}
156
b36045c1 157static void select_getanyfile(struct strbuf *hdr)
5abb013b
SP
158{
159 if (!getanyfile)
b36045c1 160 forbidden(hdr, "Unsupported service: getanyfile");
5abb013b
SP
161}
162
b36045c1
EW
163static void send_strbuf(struct strbuf *hdr,
164 const char *type, struct strbuf *buf)
2f4038ab 165{
b36045c1
EW
166 hdr_int(hdr, content_length, buf->len);
167 hdr_str(hdr, content_type, type);
168 end_headers(hdr);
cdf4fb8e 169 write_or_die(1, buf->buf, buf->len);
2f4038ab
SP
170}
171
b36045c1
EW
172static void send_local_file(struct strbuf *hdr, const char *the_type,
173 const char *name)
2f4038ab 174{
fcd12db6 175 char *p = git_pathdup("%s", name);
2f4038ab
SP
176 size_t buf_alloc = 8192;
177 char *buf = xmalloc(buf_alloc);
178 int fd;
179 struct stat sb;
2f4038ab
SP
180
181 fd = open(p, O_RDONLY);
182 if (fd < 0)
b36045c1 183 not_found(hdr, "Cannot open '%s': %s", p, strerror(errno));
2f4038ab
SP
184 if (fstat(fd, &sb) < 0)
185 die_errno("Cannot stat '%s'", p);
186
b36045c1
EW
187 hdr_int(hdr, content_length, sb.st_size);
188 hdr_str(hdr, content_type, the_type);
189 hdr_date(hdr, last_modified, sb.st_mtime);
190 end_headers(hdr);
2f4038ab 191
4a5328d6 192 for (;;) {
2f4038ab
SP
193 ssize_t n = xread(fd, buf, buf_alloc);
194 if (n < 0)
195 die_errno("Cannot read '%s'", p);
196 if (!n)
197 break;
cdf4fb8e 198 write_or_die(1, buf, n);
2f4038ab
SP
199 }
200 close(fd);
201 free(buf);
fcd12db6 202 free(p);
2f4038ab
SP
203}
204
b36045c1 205static void get_text_file(struct strbuf *hdr, char *name)
2f4038ab 206{
b36045c1
EW
207 select_getanyfile(hdr);
208 hdr_nocache(hdr);
209 send_local_file(hdr, "text/plain", name);
2f4038ab
SP
210}
211
b36045c1 212static void get_loose_object(struct strbuf *hdr, char *name)
2f4038ab 213{
b36045c1
EW
214 select_getanyfile(hdr);
215 hdr_cache_forever(hdr);
216 send_local_file(hdr, "application/x-git-loose-object", name);
2f4038ab
SP
217}
218
b36045c1 219static void get_pack_file(struct strbuf *hdr, char *name)
2f4038ab 220{
b36045c1
EW
221 select_getanyfile(hdr);
222 hdr_cache_forever(hdr);
223 send_local_file(hdr, "application/x-git-packed-objects", name);
2f4038ab
SP
224}
225
b36045c1 226static void get_idx_file(struct strbuf *hdr, char *name)
2f4038ab 227{
b36045c1
EW
228 select_getanyfile(hdr);
229 hdr_cache_forever(hdr);
230 send_local_file(hdr, "application/x-git-packed-objects-toc", name);
2f4038ab
SP
231}
232
6881f0cc 233static void http_config(void)
556cfa3b 234{
6881f0cc
TA
235 int i, value = 0;
236 struct strbuf var = STRBUF_INIT;
ae021d87 237
6881f0cc 238 git_config_get_bool("http.getanyfile", &getanyfile);
6bc0cb51 239 git_config_get_ulong("http.maxrequestbuffer", &max_request_buffer);
556cfa3b 240
6881f0cc
TA
241 for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
242 struct rpc_service *svc = &rpc_service[i];
243 strbuf_addf(&var, "http.%s", svc->config_name);
244 if (!git_config_get_bool(var.buf, &value))
245 svc->enabled = value;
246 strbuf_reset(&var);
5abb013b
SP
247 }
248
6881f0cc 249 strbuf_release(&var);
556cfa3b
SP
250}
251
b36045c1 252static struct rpc_service *select_service(struct strbuf *hdr, const char *name)
556cfa3b 253{
ae021d87 254 const char *svc_name;
556cfa3b
SP
255 struct rpc_service *svc = NULL;
256 int i;
257
ae021d87 258 if (!skip_prefix(name, "git-", &svc_name))
b36045c1 259 forbidden(hdr, "Unsupported service: '%s'", name);
556cfa3b
SP
260
261 for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
262 struct rpc_service *s = &rpc_service[i];
ae021d87 263 if (!strcmp(s->name, svc_name)) {
556cfa3b
SP
264 svc = s;
265 break;
266 }
267 }
268
269 if (!svc)
b36045c1 270 forbidden(hdr, "Unsupported service: '%s'", name);
556cfa3b 271
556cfa3b
SP
272 if (svc->enabled < 0) {
273 const char *user = getenv("REMOTE_USER");
274 svc->enabled = (user && *user) ? 1 : 0;
275 }
276 if (!svc->enabled)
b36045c1 277 forbidden(hdr, "Service not enabled: '%s'", svc->name);
556cfa3b
SP
278 return svc;
279}
280
6bc0cb51
JK
281/*
282 * This is basically strbuf_read(), except that if we
283 * hit max_request_buffer we die (we'd rather reject a
284 * maliciously large request than chew up infinite memory).
285 */
286static ssize_t read_request(int fd, unsigned char **out)
287{
288 size_t len = 0, alloc = 8192;
289 unsigned char *buf = xmalloc(alloc);
290
291 if (max_request_buffer < alloc)
292 max_request_buffer = alloc;
293
294 while (1) {
295 ssize_t cnt;
296
297 cnt = read_in_full(fd, buf + len, alloc - len);
298 if (cnt < 0) {
299 free(buf);
300 return -1;
301 }
302
303 /* partial read from read_in_full means we hit EOF */
304 len += cnt;
305 if (len < alloc) {
306 *out = buf;
307 return len;
308 }
309
310 /* otherwise, grow and try again (if we can) */
311 if (alloc == max_request_buffer)
312 die("request was larger than our maximum size (%lu);"
313 " try setting GIT_HTTP_MAX_REQUEST_BUFFER",
314 max_request_buffer);
315
316 alloc = alloc_nr(alloc);
317 if (alloc > max_request_buffer)
318 alloc = max_request_buffer;
319 REALLOC_ARRAY(buf, alloc);
320 }
321}
322
323static void inflate_request(const char *prog_name, int out, int buffer_input)
556cfa3b 324{
ef49a7a0 325 git_zstream stream;
6bc0cb51 326 unsigned char *full_request = NULL;
556cfa3b
SP
327 unsigned char in_buf[8192];
328 unsigned char out_buf[8192];
329 unsigned long cnt = 0;
556cfa3b
SP
330
331 memset(&stream, 0, sizeof(stream));
5e86c1fb 332 git_inflate_init_gzip_only(&stream);
556cfa3b
SP
333
334 while (1) {
6bc0cb51
JK
335 ssize_t n;
336
337 if (buffer_input) {
338 if (full_request)
339 n = 0; /* nothing left to read */
340 else
341 n = read_request(0, &full_request);
342 stream.next_in = full_request;
343 } else {
344 n = xread(0, in_buf, sizeof(in_buf));
345 stream.next_in = in_buf;
346 }
347
556cfa3b
SP
348 if (n <= 0)
349 die("request ended in the middle of the gzip stream");
556cfa3b
SP
350 stream.avail_in = n;
351
352 while (0 < stream.avail_in) {
353 int ret;
354
355 stream.next_out = out_buf;
356 stream.avail_out = sizeof(out_buf);
357
9e7e5ca3 358 ret = git_inflate(&stream, Z_NO_FLUSH);
556cfa3b
SP
359 if (ret != Z_OK && ret != Z_STREAM_END)
360 die("zlib error inflating request, result %d", ret);
361
362 n = stream.total_out - cnt;
06f46f23 363 if (write_in_full(out, out_buf, n) < 0)
556cfa3b
SP
364 die("%s aborted reading request", prog_name);
365 cnt += n;
366
367 if (ret == Z_STREAM_END)
368 goto done;
369 }
370 }
371
372done:
9e7e5ca3 373 git_inflate_end(&stream);
556cfa3b 374 close(out);
6bc0cb51
JK
375 free(full_request);
376}
377
378static void copy_request(const char *prog_name, int out)
379{
380 unsigned char *buf;
381 ssize_t n = read_request(0, &buf);
382 if (n < 0)
383 die_errno("error reading request body");
06f46f23 384 if (write_in_full(out, buf, n) < 0)
6bc0cb51
JK
385 die("%s aborted reading request", prog_name);
386 close(out);
387 free(buf);
556cfa3b
SP
388}
389
6bc0cb51 390static void run_service(const char **argv, int buffer_input)
556cfa3b
SP
391{
392 const char *encoding = getenv("HTTP_CONTENT_ENCODING");
393 const char *user = getenv("REMOTE_USER");
394 const char *host = getenv("REMOTE_ADDR");
556cfa3b 395 int gzipped_request = 0;
d3180279 396 struct child_process cld = CHILD_PROCESS_INIT;
556cfa3b
SP
397
398 if (encoding && !strcmp(encoding, "gzip"))
399 gzipped_request = 1;
400 else if (encoding && !strcmp(encoding, "x-gzip"))
401 gzipped_request = 1;
402
403 if (!user || !*user)
404 user = "anonymous";
405 if (!host || !*host)
406 host = "(none)";
407
e32a4581 408 if (!getenv("GIT_COMMITTER_NAME"))
a9154590 409 argv_array_pushf(&cld.env_array, "GIT_COMMITTER_NAME=%s", user);
e32a4581 410 if (!getenv("GIT_COMMITTER_EMAIL"))
a9154590
RS
411 argv_array_pushf(&cld.env_array,
412 "GIT_COMMITTER_EMAIL=%s@http.%s", user, host);
556cfa3b 413
556cfa3b 414 cld.argv = argv;
6bc0cb51 415 if (buffer_input || gzipped_request)
556cfa3b
SP
416 cld.in = -1;
417 cld.git_cmd = 1;
418 if (start_command(&cld))
419 exit(1);
420
421 close(1);
422 if (gzipped_request)
6bc0cb51
JK
423 inflate_request(argv[0], cld.in, buffer_input);
424 else if (buffer_input)
425 copy_request(argv[0], cld.in);
556cfa3b
SP
426 else
427 close(0);
428
429 if (finish_command(&cld))
430 exit(1);
556cfa3b
SP
431}
432
f72f5421
MH
433static int show_text_ref(const char *name, const struct object_id *oid,
434 int flag, void *cb_data)
2f4038ab 435{
6130f86d 436 const char *name_nons = strip_namespace(name);
2f4038ab 437 struct strbuf *buf = cb_data;
c251c83d 438 struct object *o = parse_object(oid);
2f4038ab
SP
439 if (!o)
440 return 0;
441
f72f5421 442 strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons);
2f4038ab
SP
443 if (o->type == OBJ_TAG) {
444 o = deref_tag(o, name, 0);
445 if (!o)
446 return 0;
f2fd0760 447 strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid),
6130f86d 448 name_nons);
2f4038ab
SP
449 }
450 return 0;
451}
452
b36045c1 453static void get_info_refs(struct strbuf *hdr, char *arg)
2f4038ab 454{
556cfa3b 455 const char *service_name = get_parameter("service");
2f4038ab
SP
456 struct strbuf buf = STRBUF_INIT;
457
b36045c1 458 hdr_nocache(hdr);
556cfa3b
SP
459
460 if (service_name) {
461 const char *argv[] = {NULL /* service name */,
462 "--stateless-rpc", "--advertise-refs",
463 ".", NULL};
b36045c1 464 struct rpc_service *svc = select_service(hdr, service_name);
556cfa3b
SP
465
466 strbuf_addf(&buf, "application/x-git-%s-advertisement",
467 svc->name);
b36045c1
EW
468 hdr_str(hdr, content_type, buf.buf);
469 end_headers(hdr);
556cfa3b 470
81c634e9 471 packet_write_fmt(1, "# service=git-%s\n", svc->name);
556cfa3b
SP
472 packet_flush(1);
473
474 argv[0] = svc->name;
6bc0cb51 475 run_service(argv, 0);
556cfa3b
SP
476
477 } else {
b36045c1 478 select_getanyfile(hdr);
6130f86d 479 for_each_namespaced_ref(show_text_ref, &buf);
b36045c1 480 send_strbuf(hdr, "text/plain", &buf);
556cfa3b 481 }
2f4038ab
SP
482 strbuf_release(&buf);
483}
484
f72f5421
MH
485static int show_head_ref(const char *refname, const struct object_id *oid,
486 int flag, void *cb_data)
6130f86d
JK
487{
488 struct strbuf *buf = cb_data;
489
490 if (flag & REF_ISSYMREF) {
7695d118
RS
491 const char *target = resolve_ref_unsafe(refname,
492 RESOLVE_REF_READING,
744c040b 493 NULL, NULL);
6130f86d 494
7fd12bfb
MH
495 if (target)
496 strbuf_addf(buf, "ref: %s\n", strip_namespace(target));
6130f86d 497 } else {
f72f5421 498 strbuf_addf(buf, "%s\n", oid_to_hex(oid));
6130f86d
JK
499 }
500
501 return 0;
502}
503
b36045c1 504static void get_head(struct strbuf *hdr, char *arg)
6130f86d
JK
505{
506 struct strbuf buf = STRBUF_INIT;
507
b36045c1 508 select_getanyfile(hdr);
6130f86d 509 head_ref_namespaced(show_head_ref, &buf);
b36045c1 510 send_strbuf(hdr, "text/plain", &buf);
6130f86d
JK
511 strbuf_release(&buf);
512}
513
b36045c1 514static void get_info_packs(struct strbuf *hdr, char *arg)
2f4038ab
SP
515{
516 size_t objdirlen = strlen(get_object_directory());
517 struct strbuf buf = STRBUF_INIT;
518 struct packed_git *p;
519 size_t cnt = 0;
520
b36045c1 521 select_getanyfile(hdr);
2f4038ab 522 prepare_packed_git();
a80d72db 523 for (p = get_packed_git(the_repository); p; p = p->next) {
2f4038ab
SP
524 if (p->pack_local)
525 cnt++;
526 }
527
528 strbuf_grow(&buf, cnt * 53 + 2);
a80d72db 529 for (p = get_packed_git(the_repository); p; p = p->next) {
2f4038ab
SP
530 if (p->pack_local)
531 strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6);
532 }
533 strbuf_addch(&buf, '\n');
534
b36045c1
EW
535 hdr_nocache(hdr);
536 send_strbuf(hdr, "text/plain; charset=utf-8", &buf);
2f4038ab
SP
537 strbuf_release(&buf);
538}
539
b36045c1 540static void check_content_type(struct strbuf *hdr, const char *accepted_type)
556cfa3b
SP
541{
542 const char *actual_type = getenv("CONTENT_TYPE");
543
544 if (!actual_type)
545 actual_type = "";
546
547 if (strcmp(actual_type, accepted_type)) {
b36045c1
EW
548 http_status(hdr, 415, "Unsupported Media Type");
549 hdr_nocache(hdr);
550 end_headers(hdr);
556cfa3b
SP
551 format_write(1,
552 "Expected POST with Content-Type '%s',"
553 " but received '%s' instead.\n",
554 accepted_type, actual_type);
555 exit(0);
556 }
557}
558
b36045c1 559static void service_rpc(struct strbuf *hdr, char *service_name)
556cfa3b
SP
560{
561 const char *argv[] = {NULL, "--stateless-rpc", ".", NULL};
b36045c1 562 struct rpc_service *svc = select_service(hdr, service_name);
556cfa3b
SP
563 struct strbuf buf = STRBUF_INIT;
564
565 strbuf_reset(&buf);
566 strbuf_addf(&buf, "application/x-git-%s-request", svc->name);
b36045c1 567 check_content_type(hdr, buf.buf);
556cfa3b 568
b36045c1 569 hdr_nocache(hdr);
556cfa3b
SP
570
571 strbuf_reset(&buf);
572 strbuf_addf(&buf, "application/x-git-%s-result", svc->name);
b36045c1 573 hdr_str(hdr, content_type, buf.buf);
556cfa3b 574
b36045c1 575 end_headers(hdr);
556cfa3b
SP
576
577 argv[0] = svc->name;
6bc0cb51 578 run_service(argv, svc->buffer_input);
556cfa3b
SP
579 strbuf_release(&buf);
580}
581
7253a023 582static int dead;
2f4038ab
SP
583static NORETURN void die_webcgi(const char *err, va_list params)
584{
7253a023 585 if (dead <= 1) {
b36045c1
EW
586 struct strbuf hdr = STRBUF_INIT;
587
7253a023 588 vreportf("fatal: ", err, params);
2f4038ab 589
b36045c1
EW
590 http_status(&hdr, 500, "Internal Server Error");
591 hdr_nocache(&hdr);
592 end_headers(&hdr);
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593 }
594 exit(0); /* we successfully reported a failure ;-) */
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595}
596
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597static int die_webcgi_recursing(void)
598{
599 return dead++ > 1;
600}
601
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602static char* getdir(void)
603{
604 struct strbuf buf = STRBUF_INIT;
605 char *pathinfo = getenv("PATH_INFO");
606 char *root = getenv("GIT_PROJECT_ROOT");
607 char *path = getenv("PATH_TRANSLATED");
608
609 if (root && *root) {
610 if (!pathinfo || !*pathinfo)
611 die("GIT_PROJECT_ROOT is set but PATH_INFO is not");
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612 if (daemon_avoid_alias(pathinfo))
613 die("'%s': aliased", pathinfo);
cf688cc2 614 end_url_with_slash(&buf, root);
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615 if (pathinfo[0] == '/')
616 pathinfo++;
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617 strbuf_addstr(&buf, pathinfo);
618 return strbuf_detach(&buf, NULL);
619 } else if (path && *path) {
620 return xstrdup(path);
621 } else
622 die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server");
623 return NULL;
624}
625
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626static struct service_cmd {
627 const char *method;
628 const char *pattern;
b36045c1 629 void (*imp)(struct strbuf *, char *);
2f4038ab 630} services[] = {
6130f86d 631 {"GET", "/HEAD$", get_head},
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632 {"GET", "/info/refs$", get_info_refs},
633 {"GET", "/objects/info/alternates$", get_text_file},
634 {"GET", "/objects/info/http-alternates$", get_text_file},
635 {"GET", "/objects/info/packs$", get_info_packs},
636 {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object},
637 {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file},
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SP
638 {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file},
639
640 {"POST", "/git-upload-pack$", service_rpc},
641 {"POST", "/git-receive-pack$", service_rpc}
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642};
643
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644static int bad_request(struct strbuf *hdr, const struct service_cmd *c)
645{
646 const char *proto = getenv("SERVER_PROTOCOL");
647
648 if (proto && !strcmp(proto, "HTTP/1.1")) {
649 http_status(hdr, 405, "Method Not Allowed");
650 hdr_str(hdr, "Allow",
651 !strcmp(c->method, "GET") ? "GET, HEAD" : c->method);
652 } else
653 http_status(hdr, 400, "Bad Request");
654 hdr_nocache(hdr);
655 end_headers(hdr);
656 return 0;
657}
658
3f2e2297 659int cmd_main(int argc, const char **argv)
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660{
661 char *method = getenv("REQUEST_METHOD");
917adc03 662 char *dir;
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663 struct service_cmd *cmd = NULL;
664 char *cmd_arg = NULL;
665 int i;
b36045c1 666 struct strbuf hdr = STRBUF_INIT;
2f4038ab 667
2f4038ab 668 set_die_routine(die_webcgi);
7253a023 669 set_die_is_recursing_routine(die_webcgi_recursing);
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670
671 if (!method)
672 die("No REQUEST_METHOD from server");
673 if (!strcmp(method, "HEAD"))
674 method = "GET";
917adc03 675 dir = getdir();
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676
677 for (i = 0; i < ARRAY_SIZE(services); i++) {
678 struct service_cmd *c = &services[i];
679 regex_t re;
680 regmatch_t out[1];
681
682 if (regcomp(&re, c->pattern, REG_EXTENDED))
683 die("Bogus regex in service table: %s", c->pattern);
684 if (!regexec(&re, dir, 1, out, 0)) {
48aec1b1 685 size_t n;
2f4038ab 686
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EW
687 if (strcmp(method, c->method))
688 return bad_request(&hdr, c);
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689
690 cmd = c;
48aec1b1 691 n = out[0].rm_eo - out[0].rm_so;
5c0b13f8 692 cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1);
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693 dir[out[0].rm_so] = 0;
694 break;
695 }
696 regfree(&re);
697 }
698
699 if (!cmd)
b36045c1 700 not_found(&hdr, "Request not supported: '%s'", dir);
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701
702 setup_path();
703 if (!enter_repo(dir, 0))
b36045c1 704 not_found(&hdr, "Not a git repository: '%s'", dir);
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TC
705 if (!getenv("GIT_HTTP_EXPORT_ALL") &&
706 access("git-daemon-export-ok", F_OK) )
b36045c1 707 not_found(&hdr, "Repository not exported: '%s'", dir);
2f4038ab 708
6881f0cc 709 http_config();
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JK
710 max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER",
711 max_request_buffer);
712
b36045c1 713 cmd->imp(&hdr, cmd_arg);
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714 return 0;
715}