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Commit | Line | Data |
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36bf1958 EN |
1 | #include "git-compat-util.h" |
2 | #include "alloc.h" | |
b2141fc1 | 3 | #include "config.h" |
41771fa4 | 4 | #include "hex.h" |
a80d72db | 5 | #include "repository.h" |
2f4038ab SP |
6 | #include "refs.h" |
7 | #include "pkt-line.h" | |
8 | #include "object.h" | |
9 | #include "tag.h" | |
d807c4a0 | 10 | #include "exec-cmd.h" |
556cfa3b SP |
11 | #include "run-command.h" |
12 | #include "string-list.h" | |
638794cd | 13 | #include "url.h" |
dbbcd44f | 14 | #include "strvec.h" |
0abe14f6 | 15 | #include "packfile.h" |
a80d72db | 16 | #include "object-store.h" |
237ffedd | 17 | #include "protocol.h" |
88c7b4c3 | 18 | #include "date.h" |
2f4038ab SP |
19 | |
20 | static const char content_type[] = "Content-Type"; | |
21 | static const char content_length[] = "Content-Length"; | |
22 | static const char last_modified[] = "Last-Modified"; | |
5abb013b | 23 | static int getanyfile = 1; |
6bc0cb51 | 24 | static unsigned long max_request_buffer = 10 * 1024 * 1024; |
2f4038ab | 25 | |
556cfa3b SP |
26 | static struct string_list *query_params; |
27 | ||
28 | struct rpc_service { | |
29 | const char *name; | |
30 | const char *config_name; | |
6bc0cb51 | 31 | unsigned buffer_input : 1; |
556cfa3b SP |
32 | signed enabled : 2; |
33 | }; | |
34 | ||
35 | static struct rpc_service rpc_service[] = { | |
6bc0cb51 JK |
36 | { "upload-pack", "uploadpack", 1, 1 }, |
37 | { "receive-pack", "receivepack", 0, -1 }, | |
556cfa3b SP |
38 | }; |
39 | ||
556cfa3b SP |
40 | static struct string_list *get_parameters(void) |
41 | { | |
42 | if (!query_params) { | |
43 | const char *query = getenv("QUERY_STRING"); | |
44 | ||
ca56dadb | 45 | CALLOC_ARRAY(query_params, 1); |
556cfa3b | 46 | while (query && *query) { |
638794cd JK |
47 | char *name = url_decode_parameter_name(&query); |
48 | char *value = url_decode_parameter_value(&query); | |
556cfa3b SP |
49 | struct string_list_item *i; |
50 | ||
e8c8b713 | 51 | i = string_list_lookup(query_params, name); |
556cfa3b | 52 | if (!i) |
78a395d3 | 53 | i = string_list_insert(query_params, name); |
556cfa3b SP |
54 | else |
55 | free(i->util); | |
56 | i->util = value; | |
57 | } | |
58 | } | |
59 | return query_params; | |
60 | } | |
61 | ||
62 | static const char *get_parameter(const char *name) | |
63 | { | |
64 | struct string_list_item *i; | |
e8c8b713 | 65 | i = string_list_lookup(get_parameters(), name); |
556cfa3b SP |
66 | return i ? i->util : NULL; |
67 | } | |
68 | ||
35487017 | 69 | __attribute__((format (printf, 2, 3))) |
2f4038ab SP |
70 | static void format_write(int fd, const char *fmt, ...) |
71 | { | |
72 | static char buffer[1024]; | |
73 | ||
74 | va_list args; | |
75 | unsigned n; | |
76 | ||
77 | va_start(args, fmt); | |
78 | n = vsnprintf(buffer, sizeof(buffer), fmt, args); | |
79 | va_end(args); | |
80 | if (n >= sizeof(buffer)) | |
81 | die("protocol error: impossibly long line"); | |
82 | ||
cdf4fb8e | 83 | write_or_die(fd, buffer, n); |
2f4038ab SP |
84 | } |
85 | ||
b36045c1 | 86 | static void http_status(struct strbuf *hdr, unsigned code, const char *msg) |
2f4038ab | 87 | { |
b36045c1 | 88 | strbuf_addf(hdr, "Status: %u %s\r\n", code, msg); |
2f4038ab SP |
89 | } |
90 | ||
b36045c1 | 91 | static void hdr_str(struct strbuf *hdr, const char *name, const char *value) |
2f4038ab | 92 | { |
b36045c1 | 93 | strbuf_addf(hdr, "%s: %s\r\n", name, value); |
2f4038ab SP |
94 | } |
95 | ||
b36045c1 | 96 | static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value) |
2f4038ab | 97 | { |
b36045c1 | 98 | strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value); |
2f4038ab SP |
99 | } |
100 | ||
dddbad72 | 101 | static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when) |
2f4038ab | 102 | { |
a5481a6c | 103 | const char *value = show_date(when, 0, DATE_MODE(RFC2822)); |
b36045c1 | 104 | hdr_str(hdr, name, value); |
2f4038ab SP |
105 | } |
106 | ||
b36045c1 | 107 | static void hdr_nocache(struct strbuf *hdr) |
2f4038ab | 108 | { |
b36045c1 EW |
109 | hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT"); |
110 | hdr_str(hdr, "Pragma", "no-cache"); | |
111 | hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate"); | |
2f4038ab SP |
112 | } |
113 | ||
b36045c1 | 114 | static void hdr_cache_forever(struct strbuf *hdr) |
2f4038ab | 115 | { |
dddbad72 | 116 | timestamp_t now = time(NULL); |
b36045c1 EW |
117 | hdr_date(hdr, "Date", now); |
118 | hdr_date(hdr, "Expires", now + 31536000); | |
119 | hdr_str(hdr, "Cache-Control", "public, max-age=31536000"); | |
2f4038ab SP |
120 | } |
121 | ||
b36045c1 | 122 | static void end_headers(struct strbuf *hdr) |
2f4038ab | 123 | { |
b36045c1 EW |
124 | strbuf_add(hdr, "\r\n", 2); |
125 | write_or_die(1, hdr->buf, hdr->len); | |
126 | strbuf_release(hdr); | |
2f4038ab SP |
127 | } |
128 | ||
b36045c1 EW |
129 | __attribute__((format (printf, 2, 3))) |
130 | static NORETURN void not_found(struct strbuf *hdr, const char *err, ...) | |
2f4038ab SP |
131 | { |
132 | va_list params; | |
133 | ||
b36045c1 EW |
134 | http_status(hdr, 404, "Not Found"); |
135 | hdr_nocache(hdr); | |
136 | end_headers(hdr); | |
2f4038ab SP |
137 | |
138 | va_start(params, err); | |
139 | if (err && *err) | |
140 | vfprintf(stderr, err, params); | |
141 | va_end(params); | |
142 | exit(0); | |
143 | } | |
144 | ||
b36045c1 EW |
145 | __attribute__((format (printf, 2, 3))) |
146 | static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...) | |
556cfa3b SP |
147 | { |
148 | va_list params; | |
149 | ||
b36045c1 EW |
150 | http_status(hdr, 403, "Forbidden"); |
151 | hdr_nocache(hdr); | |
152 | end_headers(hdr); | |
556cfa3b SP |
153 | |
154 | va_start(params, err); | |
155 | if (err && *err) | |
156 | vfprintf(stderr, err, params); | |
157 | va_end(params); | |
158 | exit(0); | |
159 | } | |
160 | ||
b36045c1 | 161 | static void select_getanyfile(struct strbuf *hdr) |
5abb013b SP |
162 | { |
163 | if (!getanyfile) | |
b36045c1 | 164 | forbidden(hdr, "Unsupported service: getanyfile"); |
5abb013b SP |
165 | } |
166 | ||
b36045c1 EW |
167 | static void send_strbuf(struct strbuf *hdr, |
168 | const char *type, struct strbuf *buf) | |
2f4038ab | 169 | { |
b36045c1 EW |
170 | hdr_int(hdr, content_length, buf->len); |
171 | hdr_str(hdr, content_type, type); | |
172 | end_headers(hdr); | |
cdf4fb8e | 173 | write_or_die(1, buf->buf, buf->len); |
2f4038ab SP |
174 | } |
175 | ||
b36045c1 EW |
176 | static void send_local_file(struct strbuf *hdr, const char *the_type, |
177 | const char *name) | |
2f4038ab | 178 | { |
fcd12db6 | 179 | char *p = git_pathdup("%s", name); |
2f4038ab SP |
180 | size_t buf_alloc = 8192; |
181 | char *buf = xmalloc(buf_alloc); | |
182 | int fd; | |
183 | struct stat sb; | |
2f4038ab SP |
184 | |
185 | fd = open(p, O_RDONLY); | |
186 | if (fd < 0) | |
b36045c1 | 187 | not_found(hdr, "Cannot open '%s': %s", p, strerror(errno)); |
2f4038ab SP |
188 | if (fstat(fd, &sb) < 0) |
189 | die_errno("Cannot stat '%s'", p); | |
190 | ||
b36045c1 EW |
191 | hdr_int(hdr, content_length, sb.st_size); |
192 | hdr_str(hdr, content_type, the_type); | |
193 | hdr_date(hdr, last_modified, sb.st_mtime); | |
194 | end_headers(hdr); | |
2f4038ab | 195 | |
4a5328d6 | 196 | for (;;) { |
2f4038ab SP |
197 | ssize_t n = xread(fd, buf, buf_alloc); |
198 | if (n < 0) | |
199 | die_errno("Cannot read '%s'", p); | |
200 | if (!n) | |
201 | break; | |
cdf4fb8e | 202 | write_or_die(1, buf, n); |
2f4038ab SP |
203 | } |
204 | close(fd); | |
205 | free(buf); | |
fcd12db6 | 206 | free(p); |
2f4038ab SP |
207 | } |
208 | ||
b36045c1 | 209 | static void get_text_file(struct strbuf *hdr, char *name) |
2f4038ab | 210 | { |
b36045c1 EW |
211 | select_getanyfile(hdr); |
212 | hdr_nocache(hdr); | |
213 | send_local_file(hdr, "text/plain", name); | |
2f4038ab SP |
214 | } |
215 | ||
b36045c1 | 216 | static void get_loose_object(struct strbuf *hdr, char *name) |
2f4038ab | 217 | { |
b36045c1 EW |
218 | select_getanyfile(hdr); |
219 | hdr_cache_forever(hdr); | |
220 | send_local_file(hdr, "application/x-git-loose-object", name); | |
2f4038ab SP |
221 | } |
222 | ||
b36045c1 | 223 | static void get_pack_file(struct strbuf *hdr, char *name) |
2f4038ab | 224 | { |
b36045c1 EW |
225 | select_getanyfile(hdr); |
226 | hdr_cache_forever(hdr); | |
227 | send_local_file(hdr, "application/x-git-packed-objects", name); | |
2f4038ab SP |
228 | } |
229 | ||
b36045c1 | 230 | static void get_idx_file(struct strbuf *hdr, char *name) |
2f4038ab | 231 | { |
b36045c1 EW |
232 | select_getanyfile(hdr); |
233 | hdr_cache_forever(hdr); | |
234 | send_local_file(hdr, "application/x-git-packed-objects-toc", name); | |
2f4038ab SP |
235 | } |
236 | ||
6881f0cc | 237 | static void http_config(void) |
556cfa3b | 238 | { |
6881f0cc TA |
239 | int i, value = 0; |
240 | struct strbuf var = STRBUF_INIT; | |
ae021d87 | 241 | |
6881f0cc | 242 | git_config_get_bool("http.getanyfile", &getanyfile); |
6bc0cb51 | 243 | git_config_get_ulong("http.maxrequestbuffer", &max_request_buffer); |
556cfa3b | 244 | |
6881f0cc TA |
245 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { |
246 | struct rpc_service *svc = &rpc_service[i]; | |
247 | strbuf_addf(&var, "http.%s", svc->config_name); | |
248 | if (!git_config_get_bool(var.buf, &value)) | |
249 | svc->enabled = value; | |
250 | strbuf_reset(&var); | |
5abb013b SP |
251 | } |
252 | ||
6881f0cc | 253 | strbuf_release(&var); |
556cfa3b SP |
254 | } |
255 | ||
b36045c1 | 256 | static struct rpc_service *select_service(struct strbuf *hdr, const char *name) |
556cfa3b | 257 | { |
ae021d87 | 258 | const char *svc_name; |
556cfa3b SP |
259 | struct rpc_service *svc = NULL; |
260 | int i; | |
261 | ||
ae021d87 | 262 | if (!skip_prefix(name, "git-", &svc_name)) |
b36045c1 | 263 | forbidden(hdr, "Unsupported service: '%s'", name); |
556cfa3b SP |
264 | |
265 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { | |
266 | struct rpc_service *s = &rpc_service[i]; | |
ae021d87 | 267 | if (!strcmp(s->name, svc_name)) { |
556cfa3b SP |
268 | svc = s; |
269 | break; | |
270 | } | |
271 | } | |
272 | ||
273 | if (!svc) | |
b36045c1 | 274 | forbidden(hdr, "Unsupported service: '%s'", name); |
556cfa3b | 275 | |
556cfa3b SP |
276 | if (svc->enabled < 0) { |
277 | const char *user = getenv("REMOTE_USER"); | |
278 | svc->enabled = (user && *user) ? 1 : 0; | |
279 | } | |
280 | if (!svc->enabled) | |
b36045c1 | 281 | forbidden(hdr, "Service not enabled: '%s'", svc->name); |
556cfa3b SP |
282 | return svc; |
283 | } | |
284 | ||
6b1fae1d MK |
285 | static void write_to_child(int out, const unsigned char *buf, ssize_t len, const char *prog_name) |
286 | { | |
287 | if (write_in_full(out, buf, len) < 0) | |
288 | die("unable to write to '%s'", prog_name); | |
289 | } | |
290 | ||
6bc0cb51 JK |
291 | /* |
292 | * This is basically strbuf_read(), except that if we | |
293 | * hit max_request_buffer we die (we'd rather reject a | |
294 | * maliciously large request than chew up infinite memory). | |
295 | */ | |
c79edf73 | 296 | static ssize_t read_request_eof(int fd, unsigned char **out) |
6bc0cb51 JK |
297 | { |
298 | size_t len = 0, alloc = 8192; | |
299 | unsigned char *buf = xmalloc(alloc); | |
300 | ||
301 | if (max_request_buffer < alloc) | |
302 | max_request_buffer = alloc; | |
303 | ||
304 | while (1) { | |
305 | ssize_t cnt; | |
306 | ||
307 | cnt = read_in_full(fd, buf + len, alloc - len); | |
308 | if (cnt < 0) { | |
309 | free(buf); | |
310 | return -1; | |
311 | } | |
312 | ||
313 | /* partial read from read_in_full means we hit EOF */ | |
314 | len += cnt; | |
315 | if (len < alloc) { | |
316 | *out = buf; | |
317 | return len; | |
318 | } | |
319 | ||
320 | /* otherwise, grow and try again (if we can) */ | |
321 | if (alloc == max_request_buffer) | |
322 | die("request was larger than our maximum size (%lu);" | |
323 | " try setting GIT_HTTP_MAX_REQUEST_BUFFER", | |
324 | max_request_buffer); | |
325 | ||
326 | alloc = alloc_nr(alloc); | |
327 | if (alloc > max_request_buffer) | |
328 | alloc = max_request_buffer; | |
329 | REALLOC_ARRAY(buf, alloc); | |
330 | } | |
331 | } | |
332 | ||
c79edf73 MK |
333 | static ssize_t read_request_fixed_len(int fd, ssize_t req_len, unsigned char **out) |
334 | { | |
335 | unsigned char *buf = NULL; | |
336 | ssize_t cnt = 0; | |
337 | ||
338 | if (max_request_buffer < req_len) { | |
339 | die("request was larger than our maximum size (%lu): " | |
340 | "%" PRIuMAX "; try setting GIT_HTTP_MAX_REQUEST_BUFFER", | |
341 | max_request_buffer, (uintmax_t)req_len); | |
342 | } | |
343 | ||
344 | buf = xmalloc(req_len); | |
345 | cnt = read_in_full(fd, buf, req_len); | |
346 | if (cnt < 0) { | |
347 | free(buf); | |
348 | return -1; | |
349 | } | |
350 | *out = buf; | |
351 | return cnt; | |
352 | } | |
353 | ||
354 | static ssize_t get_content_length(void) | |
355 | { | |
356 | ssize_t val = -1; | |
357 | const char *str = getenv("CONTENT_LENGTH"); | |
358 | ||
574c513e | 359 | if (str && *str && !git_parse_ssize_t(str, &val)) |
c79edf73 MK |
360 | die("failed to parse CONTENT_LENGTH: %s", str); |
361 | return val; | |
362 | } | |
363 | ||
364 | static ssize_t read_request(int fd, unsigned char **out, ssize_t req_len) | |
365 | { | |
366 | if (req_len < 0) | |
367 | return read_request_eof(fd, out); | |
368 | else | |
369 | return read_request_fixed_len(fd, req_len, out); | |
370 | } | |
371 | ||
372 | static void inflate_request(const char *prog_name, int out, int buffer_input, ssize_t req_len) | |
556cfa3b | 373 | { |
ef49a7a0 | 374 | git_zstream stream; |
6bc0cb51 | 375 | unsigned char *full_request = NULL; |
556cfa3b SP |
376 | unsigned char in_buf[8192]; |
377 | unsigned char out_buf[8192]; | |
378 | unsigned long cnt = 0; | |
6c213e86 MK |
379 | int req_len_defined = req_len >= 0; |
380 | size_t req_remaining_len = req_len; | |
556cfa3b SP |
381 | |
382 | memset(&stream, 0, sizeof(stream)); | |
5e86c1fb | 383 | git_inflate_init_gzip_only(&stream); |
556cfa3b SP |
384 | |
385 | while (1) { | |
6bc0cb51 JK |
386 | ssize_t n; |
387 | ||
388 | if (buffer_input) { | |
389 | if (full_request) | |
390 | n = 0; /* nothing left to read */ | |
391 | else | |
c79edf73 | 392 | n = read_request(0, &full_request, req_len); |
6bc0cb51 JK |
393 | stream.next_in = full_request; |
394 | } else { | |
6c213e86 MK |
395 | ssize_t buffer_len; |
396 | if (req_len_defined && req_remaining_len <= sizeof(in_buf)) | |
397 | buffer_len = req_remaining_len; | |
398 | else | |
399 | buffer_len = sizeof(in_buf); | |
400 | n = xread(0, in_buf, buffer_len); | |
6bc0cb51 | 401 | stream.next_in = in_buf; |
6c213e86 MK |
402 | if (req_len_defined && n > 0) |
403 | req_remaining_len -= n; | |
6bc0cb51 JK |
404 | } |
405 | ||
556cfa3b SP |
406 | if (n <= 0) |
407 | die("request ended in the middle of the gzip stream"); | |
556cfa3b SP |
408 | stream.avail_in = n; |
409 | ||
410 | while (0 < stream.avail_in) { | |
411 | int ret; | |
412 | ||
413 | stream.next_out = out_buf; | |
414 | stream.avail_out = sizeof(out_buf); | |
415 | ||
9e7e5ca3 | 416 | ret = git_inflate(&stream, Z_NO_FLUSH); |
556cfa3b SP |
417 | if (ret != Z_OK && ret != Z_STREAM_END) |
418 | die("zlib error inflating request, result %d", ret); | |
419 | ||
420 | n = stream.total_out - cnt; | |
6b1fae1d MK |
421 | write_to_child(out, out_buf, stream.total_out - cnt, prog_name); |
422 | cnt = stream.total_out; | |
556cfa3b SP |
423 | |
424 | if (ret == Z_STREAM_END) | |
425 | goto done; | |
426 | } | |
427 | } | |
428 | ||
429 | done: | |
9e7e5ca3 | 430 | git_inflate_end(&stream); |
556cfa3b | 431 | close(out); |
6bc0cb51 JK |
432 | free(full_request); |
433 | } | |
434 | ||
c79edf73 | 435 | static void copy_request(const char *prog_name, int out, ssize_t req_len) |
6bc0cb51 JK |
436 | { |
437 | unsigned char *buf; | |
c79edf73 | 438 | ssize_t n = read_request(0, &buf, req_len); |
6bc0cb51 JK |
439 | if (n < 0) |
440 | die_errno("error reading request body"); | |
6b1fae1d | 441 | write_to_child(out, buf, n, prog_name); |
6bc0cb51 JK |
442 | close(out); |
443 | free(buf); | |
556cfa3b SP |
444 | } |
445 | ||
6c213e86 MK |
446 | static void pipe_fixed_length(const char *prog_name, int out, size_t req_len) |
447 | { | |
448 | unsigned char buf[8192]; | |
449 | size_t remaining_len = req_len; | |
450 | ||
451 | while (remaining_len > 0) { | |
452 | size_t chunk_length = remaining_len > sizeof(buf) ? sizeof(buf) : remaining_len; | |
453 | ssize_t n = xread(0, buf, chunk_length); | |
454 | if (n < 0) | |
455 | die_errno("Reading request failed"); | |
456 | write_to_child(out, buf, n, prog_name); | |
457 | remaining_len -= n; | |
458 | } | |
459 | ||
460 | close(out); | |
461 | } | |
462 | ||
6bc0cb51 | 463 | static void run_service(const char **argv, int buffer_input) |
556cfa3b SP |
464 | { |
465 | const char *encoding = getenv("HTTP_CONTENT_ENCODING"); | |
466 | const char *user = getenv("REMOTE_USER"); | |
467 | const char *host = getenv("REMOTE_ADDR"); | |
556cfa3b | 468 | int gzipped_request = 0; |
d3180279 | 469 | struct child_process cld = CHILD_PROCESS_INIT; |
c79edf73 | 470 | ssize_t req_len = get_content_length(); |
556cfa3b | 471 | |
12144e8f | 472 | if (encoding && (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip"))) |
556cfa3b SP |
473 | gzipped_request = 1; |
474 | ||
475 | if (!user || !*user) | |
476 | user = "anonymous"; | |
477 | if (!host || !*host) | |
478 | host = "(none)"; | |
479 | ||
e32a4581 | 480 | if (!getenv("GIT_COMMITTER_NAME")) |
29fda24d | 481 | strvec_pushf(&cld.env, "GIT_COMMITTER_NAME=%s", user); |
e32a4581 | 482 | if (!getenv("GIT_COMMITTER_EMAIL")) |
29fda24d | 483 | strvec_pushf(&cld.env, |
f6d8942b | 484 | "GIT_COMMITTER_EMAIL=%s@http.%s", user, host); |
556cfa3b | 485 | |
6def0ff8 | 486 | strvec_pushv(&cld.args, argv); |
6c213e86 | 487 | if (buffer_input || gzipped_request || req_len >= 0) |
556cfa3b SP |
488 | cld.in = -1; |
489 | cld.git_cmd = 1; | |
02818a98 MK |
490 | cld.clean_on_exit = 1; |
491 | cld.wait_after_clean = 1; | |
556cfa3b SP |
492 | if (start_command(&cld)) |
493 | exit(1); | |
494 | ||
495 | close(1); | |
496 | if (gzipped_request) | |
c79edf73 | 497 | inflate_request(argv[0], cld.in, buffer_input, req_len); |
6bc0cb51 | 498 | else if (buffer_input) |
c79edf73 | 499 | copy_request(argv[0], cld.in, req_len); |
6c213e86 MK |
500 | else if (req_len >= 0) |
501 | pipe_fixed_length(argv[0], cld.in, req_len); | |
556cfa3b SP |
502 | else |
503 | close(0); | |
504 | ||
505 | if (finish_command(&cld)) | |
506 | exit(1); | |
556cfa3b SP |
507 | } |
508 | ||
f72f5421 | 509 | static int show_text_ref(const char *name, const struct object_id *oid, |
5cf88fd8 | 510 | int flag UNUSED, void *cb_data) |
2f4038ab | 511 | { |
6130f86d | 512 | const char *name_nons = strip_namespace(name); |
2f4038ab | 513 | struct strbuf *buf = cb_data; |
109cd76d | 514 | struct object *o = parse_object(the_repository, oid); |
2f4038ab SP |
515 | if (!o) |
516 | return 0; | |
517 | ||
f72f5421 | 518 | strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons); |
2f4038ab | 519 | if (o->type == OBJ_TAG) { |
a74093da | 520 | o = deref_tag(the_repository, o, name, 0); |
2f4038ab SP |
521 | if (!o) |
522 | return 0; | |
f2fd0760 | 523 | strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid), |
6130f86d | 524 | name_nons); |
2f4038ab SP |
525 | } |
526 | return 0; | |
527 | } | |
528 | ||
2be1506a | 529 | static void get_info_refs(struct strbuf *hdr, char *arg UNUSED) |
2f4038ab | 530 | { |
556cfa3b | 531 | const char *service_name = get_parameter("service"); |
2f4038ab SP |
532 | struct strbuf buf = STRBUF_INIT; |
533 | ||
b36045c1 | 534 | hdr_nocache(hdr); |
556cfa3b SP |
535 | |
536 | if (service_name) { | |
537 | const char *argv[] = {NULL /* service name */, | |
98e2d9d6 | 538 | "--http-backend-info-refs", |
556cfa3b | 539 | ".", NULL}; |
b36045c1 | 540 | struct rpc_service *svc = select_service(hdr, service_name); |
556cfa3b SP |
541 | |
542 | strbuf_addf(&buf, "application/x-git-%s-advertisement", | |
543 | svc->name); | |
b36045c1 EW |
544 | hdr_str(hdr, content_type, buf.buf); |
545 | end_headers(hdr); | |
556cfa3b | 546 | |
237ffedd BW |
547 | |
548 | if (determine_protocol_version_server() != protocol_v2) { | |
549 | packet_write_fmt(1, "# service=git-%s\n", svc->name); | |
550 | packet_flush(1); | |
551 | } | |
556cfa3b SP |
552 | |
553 | argv[0] = svc->name; | |
6bc0cb51 | 554 | run_service(argv, 0); |
556cfa3b SP |
555 | |
556 | } else { | |
b36045c1 | 557 | select_getanyfile(hdr); |
6130f86d | 558 | for_each_namespaced_ref(show_text_ref, &buf); |
b36045c1 | 559 | send_strbuf(hdr, "text/plain", &buf); |
556cfa3b | 560 | } |
2f4038ab SP |
561 | strbuf_release(&buf); |
562 | } | |
563 | ||
f72f5421 MH |
564 | static int show_head_ref(const char *refname, const struct object_id *oid, |
565 | int flag, void *cb_data) | |
6130f86d JK |
566 | { |
567 | struct strbuf *buf = cb_data; | |
568 | ||
569 | if (flag & REF_ISSYMREF) { | |
7695d118 RS |
570 | const char *target = resolve_ref_unsafe(refname, |
571 | RESOLVE_REF_READING, | |
744c040b | 572 | NULL, NULL); |
6130f86d | 573 | |
7fd12bfb MH |
574 | if (target) |
575 | strbuf_addf(buf, "ref: %s\n", strip_namespace(target)); | |
6130f86d | 576 | } else { |
f72f5421 | 577 | strbuf_addf(buf, "%s\n", oid_to_hex(oid)); |
6130f86d JK |
578 | } |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
2be1506a | 583 | static void get_head(struct strbuf *hdr, char *arg UNUSED) |
6130f86d JK |
584 | { |
585 | struct strbuf buf = STRBUF_INIT; | |
586 | ||
b36045c1 | 587 | select_getanyfile(hdr); |
6130f86d | 588 | head_ref_namespaced(show_head_ref, &buf); |
b36045c1 | 589 | send_strbuf(hdr, "text/plain", &buf); |
6130f86d JK |
590 | strbuf_release(&buf); |
591 | } | |
592 | ||
2be1506a | 593 | static void get_info_packs(struct strbuf *hdr, char *arg UNUSED) |
2f4038ab SP |
594 | { |
595 | size_t objdirlen = strlen(get_object_directory()); | |
596 | struct strbuf buf = STRBUF_INIT; | |
597 | struct packed_git *p; | |
598 | size_t cnt = 0; | |
599 | ||
b36045c1 | 600 | select_getanyfile(hdr); |
454ea2e4 | 601 | for (p = get_all_packs(the_repository); p; p = p->next) { |
2f4038ab SP |
602 | if (p->pack_local) |
603 | cnt++; | |
604 | } | |
605 | ||
606 | strbuf_grow(&buf, cnt * 53 + 2); | |
454ea2e4 | 607 | for (p = get_all_packs(the_repository); p; p = p->next) { |
2f4038ab SP |
608 | if (p->pack_local) |
609 | strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6); | |
610 | } | |
611 | strbuf_addch(&buf, '\n'); | |
612 | ||
b36045c1 EW |
613 | hdr_nocache(hdr); |
614 | send_strbuf(hdr, "text/plain; charset=utf-8", &buf); | |
2f4038ab SP |
615 | strbuf_release(&buf); |
616 | } | |
617 | ||
b36045c1 | 618 | static void check_content_type(struct strbuf *hdr, const char *accepted_type) |
556cfa3b SP |
619 | { |
620 | const char *actual_type = getenv("CONTENT_TYPE"); | |
621 | ||
622 | if (!actual_type) | |
623 | actual_type = ""; | |
624 | ||
625 | if (strcmp(actual_type, accepted_type)) { | |
b36045c1 EW |
626 | http_status(hdr, 415, "Unsupported Media Type"); |
627 | hdr_nocache(hdr); | |
628 | end_headers(hdr); | |
556cfa3b SP |
629 | format_write(1, |
630 | "Expected POST with Content-Type '%s'," | |
631 | " but received '%s' instead.\n", | |
632 | accepted_type, actual_type); | |
633 | exit(0); | |
634 | } | |
635 | } | |
636 | ||
b36045c1 | 637 | static void service_rpc(struct strbuf *hdr, char *service_name) |
556cfa3b SP |
638 | { |
639 | const char *argv[] = {NULL, "--stateless-rpc", ".", NULL}; | |
b36045c1 | 640 | struct rpc_service *svc = select_service(hdr, service_name); |
556cfa3b SP |
641 | struct strbuf buf = STRBUF_INIT; |
642 | ||
643 | strbuf_reset(&buf); | |
644 | strbuf_addf(&buf, "application/x-git-%s-request", svc->name); | |
b36045c1 | 645 | check_content_type(hdr, buf.buf); |
556cfa3b | 646 | |
b36045c1 | 647 | hdr_nocache(hdr); |
556cfa3b SP |
648 | |
649 | strbuf_reset(&buf); | |
650 | strbuf_addf(&buf, "application/x-git-%s-result", svc->name); | |
b36045c1 | 651 | hdr_str(hdr, content_type, buf.buf); |
556cfa3b | 652 | |
b36045c1 | 653 | end_headers(hdr); |
556cfa3b SP |
654 | |
655 | argv[0] = svc->name; | |
6bc0cb51 | 656 | run_service(argv, svc->buffer_input); |
556cfa3b SP |
657 | strbuf_release(&buf); |
658 | } | |
659 | ||
7253a023 | 660 | static int dead; |
2f4038ab SP |
661 | static NORETURN void die_webcgi(const char *err, va_list params) |
662 | { | |
7253a023 | 663 | if (dead <= 1) { |
b36045c1 | 664 | struct strbuf hdr = STRBUF_INIT; |
e081a7c3 | 665 | report_fn die_message_fn = get_die_message_routine(); |
b36045c1 | 666 | |
e081a7c3 | 667 | die_message_fn(err, params); |
2f4038ab | 668 | |
b36045c1 EW |
669 | http_status(&hdr, 500, "Internal Server Error"); |
670 | hdr_nocache(&hdr); | |
671 | end_headers(&hdr); | |
5856b5f5 SP |
672 | } |
673 | exit(0); /* we successfully reported a failure ;-) */ | |
2f4038ab SP |
674 | } |
675 | ||
7253a023 JK |
676 | static int die_webcgi_recursing(void) |
677 | { | |
678 | return dead++ > 1; | |
679 | } | |
680 | ||
917adc03 ML |
681 | static char* getdir(void) |
682 | { | |
683 | struct strbuf buf = STRBUF_INIT; | |
684 | char *pathinfo = getenv("PATH_INFO"); | |
685 | char *root = getenv("GIT_PROJECT_ROOT"); | |
686 | char *path = getenv("PATH_TRANSLATED"); | |
687 | ||
688 | if (root && *root) { | |
689 | if (!pathinfo || !*pathinfo) | |
690 | die("GIT_PROJECT_ROOT is set but PATH_INFO is not"); | |
34b6cb8b SP |
691 | if (daemon_avoid_alias(pathinfo)) |
692 | die("'%s': aliased", pathinfo); | |
cf688cc2 | 693 | end_url_with_slash(&buf, root); |
34b6cb8b SP |
694 | if (pathinfo[0] == '/') |
695 | pathinfo++; | |
917adc03 ML |
696 | strbuf_addstr(&buf, pathinfo); |
697 | return strbuf_detach(&buf, NULL); | |
698 | } else if (path && *path) { | |
699 | return xstrdup(path); | |
700 | } else | |
701 | die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server"); | |
702 | return NULL; | |
703 | } | |
704 | ||
2f4038ab SP |
705 | static struct service_cmd { |
706 | const char *method; | |
707 | const char *pattern; | |
b36045c1 | 708 | void (*imp)(struct strbuf *, char *); |
2f4038ab | 709 | } services[] = { |
6130f86d | 710 | {"GET", "/HEAD$", get_head}, |
2f4038ab SP |
711 | {"GET", "/info/refs$", get_info_refs}, |
712 | {"GET", "/objects/info/alternates$", get_text_file}, | |
713 | {"GET", "/objects/info/http-alternates$", get_text_file}, | |
714 | {"GET", "/objects/info/packs$", get_info_packs}, | |
715 | {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object}, | |
f786ae9f | 716 | {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{62}$", get_loose_object}, |
2f4038ab | 717 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file}, |
f786ae9f | 718 | {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.pack$", get_pack_file}, |
556cfa3b | 719 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file}, |
f786ae9f | 720 | {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.idx$", get_idx_file}, |
556cfa3b SP |
721 | |
722 | {"POST", "/git-upload-pack$", service_rpc}, | |
723 | {"POST", "/git-receive-pack$", service_rpc} | |
2f4038ab SP |
724 | }; |
725 | ||
b36045c1 EW |
726 | static int bad_request(struct strbuf *hdr, const struct service_cmd *c) |
727 | { | |
728 | const char *proto = getenv("SERVER_PROTOCOL"); | |
729 | ||
730 | if (proto && !strcmp(proto, "HTTP/1.1")) { | |
731 | http_status(hdr, 405, "Method Not Allowed"); | |
732 | hdr_str(hdr, "Allow", | |
733 | !strcmp(c->method, "GET") ? "GET, HEAD" : c->method); | |
734 | } else | |
735 | http_status(hdr, 400, "Bad Request"); | |
736 | hdr_nocache(hdr); | |
737 | end_headers(hdr); | |
738 | return 0; | |
739 | } | |
740 | ||
77ef8b0e | 741 | int cmd_main(int argc UNUSED, const char **argv UNUSED) |
2f4038ab SP |
742 | { |
743 | char *method = getenv("REQUEST_METHOD"); | |
ff6a37c9 | 744 | const char *proto_header; |
917adc03 | 745 | char *dir; |
2f4038ab SP |
746 | struct service_cmd *cmd = NULL; |
747 | char *cmd_arg = NULL; | |
748 | int i; | |
b36045c1 | 749 | struct strbuf hdr = STRBUF_INIT; |
2f4038ab | 750 | |
2f4038ab | 751 | set_die_routine(die_webcgi); |
7253a023 | 752 | set_die_is_recursing_routine(die_webcgi_recursing); |
2f4038ab SP |
753 | |
754 | if (!method) | |
755 | die("No REQUEST_METHOD from server"); | |
756 | if (!strcmp(method, "HEAD")) | |
757 | method = "GET"; | |
917adc03 | 758 | dir = getdir(); |
2f4038ab SP |
759 | |
760 | for (i = 0; i < ARRAY_SIZE(services); i++) { | |
761 | struct service_cmd *c = &services[i]; | |
762 | regex_t re; | |
763 | regmatch_t out[1]; | |
2139bd02 | 764 | int ret; |
2f4038ab SP |
765 | |
766 | if (regcomp(&re, c->pattern, REG_EXTENDED)) | |
767 | die("Bogus regex in service table: %s", c->pattern); | |
2139bd02 ÆAB |
768 | ret = regexec(&re, dir, 1, out, 0); |
769 | regfree(&re); | |
770 | ||
771 | if (!ret) { | |
48aec1b1 | 772 | size_t n; |
2f4038ab | 773 | |
b36045c1 EW |
774 | if (strcmp(method, c->method)) |
775 | return bad_request(&hdr, c); | |
2f4038ab SP |
776 | |
777 | cmd = c; | |
48aec1b1 | 778 | n = out[0].rm_eo - out[0].rm_so; |
5c0b13f8 | 779 | cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1); |
2f4038ab SP |
780 | dir[out[0].rm_so] = 0; |
781 | break; | |
782 | } | |
2f4038ab SP |
783 | } |
784 | ||
785 | if (!cmd) | |
b36045c1 | 786 | not_found(&hdr, "Request not supported: '%s'", dir); |
2f4038ab SP |
787 | |
788 | setup_path(); | |
789 | if (!enter_repo(dir, 0)) | |
b36045c1 | 790 | not_found(&hdr, "Not a git repository: '%s'", dir); |
8b2bd7cd TC |
791 | if (!getenv("GIT_HTTP_EXPORT_ALL") && |
792 | access("git-daemon-export-ok", F_OK) ) | |
b36045c1 | 793 | not_found(&hdr, "Repository not exported: '%s'", dir); |
eef75d24 | 794 | free(dir); |
2f4038ab | 795 | |
6881f0cc | 796 | http_config(); |
6bc0cb51 JK |
797 | max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER", |
798 | max_request_buffer); | |
ff6a37c9 JK |
799 | proto_header = getenv("HTTP_GIT_PROTOCOL"); |
800 | if (proto_header) | |
801 | setenv(GIT_PROTOCOL_ENVIRONMENT, proto_header, 0); | |
6bc0cb51 | 802 | |
b36045c1 | 803 | cmd->imp(&hdr, cmd_arg); |
eef75d24 | 804 | free(cmd_arg); |
2f4038ab SP |
805 | return 0; |
806 | } |