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Commit | Line | Data |
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d530c04e | 1 | #include "git-compat-util.h" |
b2141fc1 | 2 | #include "config.h" |
32a8f510 | 3 | #include "environment.h" |
d88dbaa7 | 4 | #include "git-zlib.h" |
41771fa4 | 5 | #include "hex.h" |
c339932b | 6 | #include "path.h" |
a80d72db | 7 | #include "repository.h" |
2f4038ab SP |
8 | #include "refs.h" |
9 | #include "pkt-line.h" | |
10 | #include "object.h" | |
11 | #include "tag.h" | |
d807c4a0 | 12 | #include "exec-cmd.h" |
556cfa3b SP |
13 | #include "run-command.h" |
14 | #include "string-list.h" | |
638794cd | 15 | #include "url.h" |
dbbcd44f | 16 | #include "strvec.h" |
0abe14f6 | 17 | #include "packfile.h" |
a034e910 | 18 | #include "object-store-ll.h" |
237ffedd | 19 | #include "protocol.h" |
88c7b4c3 | 20 | #include "date.h" |
d48be35c | 21 | #include "write-or-die.h" |
2f4038ab SP |
22 | |
23 | static const char content_type[] = "Content-Type"; | |
24 | static const char content_length[] = "Content-Length"; | |
25 | static const char last_modified[] = "Last-Modified"; | |
5abb013b | 26 | static int getanyfile = 1; |
6bc0cb51 | 27 | static unsigned long max_request_buffer = 10 * 1024 * 1024; |
2f4038ab | 28 | |
556cfa3b SP |
29 | static struct string_list *query_params; |
30 | ||
31 | struct rpc_service { | |
32 | const char *name; | |
33 | const char *config_name; | |
6bc0cb51 | 34 | unsigned buffer_input : 1; |
556cfa3b SP |
35 | signed enabled : 2; |
36 | }; | |
37 | ||
38 | static struct rpc_service rpc_service[] = { | |
6bc0cb51 JK |
39 | { "upload-pack", "uploadpack", 1, 1 }, |
40 | { "receive-pack", "receivepack", 0, -1 }, | |
556cfa3b SP |
41 | }; |
42 | ||
556cfa3b SP |
43 | static struct string_list *get_parameters(void) |
44 | { | |
45 | if (!query_params) { | |
46 | const char *query = getenv("QUERY_STRING"); | |
47 | ||
ca56dadb | 48 | CALLOC_ARRAY(query_params, 1); |
556cfa3b | 49 | while (query && *query) { |
638794cd JK |
50 | char *name = url_decode_parameter_name(&query); |
51 | char *value = url_decode_parameter_value(&query); | |
556cfa3b SP |
52 | struct string_list_item *i; |
53 | ||
e8c8b713 | 54 | i = string_list_lookup(query_params, name); |
556cfa3b | 55 | if (!i) |
78a395d3 | 56 | i = string_list_insert(query_params, name); |
556cfa3b SP |
57 | else |
58 | free(i->util); | |
59 | i->util = value; | |
60 | } | |
61 | } | |
62 | return query_params; | |
63 | } | |
64 | ||
65 | static const char *get_parameter(const char *name) | |
66 | { | |
67 | struct string_list_item *i; | |
e8c8b713 | 68 | i = string_list_lookup(get_parameters(), name); |
556cfa3b SP |
69 | return i ? i->util : NULL; |
70 | } | |
71 | ||
35487017 | 72 | __attribute__((format (printf, 2, 3))) |
2f4038ab SP |
73 | static void format_write(int fd, const char *fmt, ...) |
74 | { | |
75 | static char buffer[1024]; | |
76 | ||
77 | va_list args; | |
78 | unsigned n; | |
79 | ||
80 | va_start(args, fmt); | |
81 | n = vsnprintf(buffer, sizeof(buffer), fmt, args); | |
82 | va_end(args); | |
83 | if (n >= sizeof(buffer)) | |
84 | die("protocol error: impossibly long line"); | |
85 | ||
cdf4fb8e | 86 | write_or_die(fd, buffer, n); |
2f4038ab SP |
87 | } |
88 | ||
b36045c1 | 89 | static void http_status(struct strbuf *hdr, unsigned code, const char *msg) |
2f4038ab | 90 | { |
b36045c1 | 91 | strbuf_addf(hdr, "Status: %u %s\r\n", code, msg); |
2f4038ab SP |
92 | } |
93 | ||
b36045c1 | 94 | static void hdr_str(struct strbuf *hdr, const char *name, const char *value) |
2f4038ab | 95 | { |
b36045c1 | 96 | strbuf_addf(hdr, "%s: %s\r\n", name, value); |
2f4038ab SP |
97 | } |
98 | ||
b36045c1 | 99 | static void hdr_int(struct strbuf *hdr, const char *name, uintmax_t value) |
2f4038ab | 100 | { |
b36045c1 | 101 | strbuf_addf(hdr, "%s: %" PRIuMAX "\r\n", name, value); |
2f4038ab SP |
102 | } |
103 | ||
dddbad72 | 104 | static void hdr_date(struct strbuf *hdr, const char *name, timestamp_t when) |
2f4038ab | 105 | { |
a5481a6c | 106 | const char *value = show_date(when, 0, DATE_MODE(RFC2822)); |
b36045c1 | 107 | hdr_str(hdr, name, value); |
2f4038ab SP |
108 | } |
109 | ||
b36045c1 | 110 | static void hdr_nocache(struct strbuf *hdr) |
2f4038ab | 111 | { |
b36045c1 EW |
112 | hdr_str(hdr, "Expires", "Fri, 01 Jan 1980 00:00:00 GMT"); |
113 | hdr_str(hdr, "Pragma", "no-cache"); | |
114 | hdr_str(hdr, "Cache-Control", "no-cache, max-age=0, must-revalidate"); | |
2f4038ab SP |
115 | } |
116 | ||
b36045c1 | 117 | static void hdr_cache_forever(struct strbuf *hdr) |
2f4038ab | 118 | { |
dddbad72 | 119 | timestamp_t now = time(NULL); |
b36045c1 EW |
120 | hdr_date(hdr, "Date", now); |
121 | hdr_date(hdr, "Expires", now + 31536000); | |
122 | hdr_str(hdr, "Cache-Control", "public, max-age=31536000"); | |
2f4038ab SP |
123 | } |
124 | ||
b36045c1 | 125 | static void end_headers(struct strbuf *hdr) |
2f4038ab | 126 | { |
b36045c1 EW |
127 | strbuf_add(hdr, "\r\n", 2); |
128 | write_or_die(1, hdr->buf, hdr->len); | |
129 | strbuf_release(hdr); | |
2f4038ab SP |
130 | } |
131 | ||
b36045c1 EW |
132 | __attribute__((format (printf, 2, 3))) |
133 | static NORETURN void not_found(struct strbuf *hdr, const char *err, ...) | |
2f4038ab SP |
134 | { |
135 | va_list params; | |
136 | ||
b36045c1 EW |
137 | http_status(hdr, 404, "Not Found"); |
138 | hdr_nocache(hdr); | |
139 | end_headers(hdr); | |
2f4038ab SP |
140 | |
141 | va_start(params, err); | |
142 | if (err && *err) | |
143 | vfprintf(stderr, err, params); | |
144 | va_end(params); | |
145 | exit(0); | |
146 | } | |
147 | ||
b36045c1 EW |
148 | __attribute__((format (printf, 2, 3))) |
149 | static NORETURN void forbidden(struct strbuf *hdr, const char *err, ...) | |
556cfa3b SP |
150 | { |
151 | va_list params; | |
152 | ||
b36045c1 EW |
153 | http_status(hdr, 403, "Forbidden"); |
154 | hdr_nocache(hdr); | |
155 | end_headers(hdr); | |
556cfa3b SP |
156 | |
157 | va_start(params, err); | |
158 | if (err && *err) | |
159 | vfprintf(stderr, err, params); | |
160 | va_end(params); | |
161 | exit(0); | |
162 | } | |
163 | ||
b36045c1 | 164 | static void select_getanyfile(struct strbuf *hdr) |
5abb013b SP |
165 | { |
166 | if (!getanyfile) | |
b36045c1 | 167 | forbidden(hdr, "Unsupported service: getanyfile"); |
5abb013b SP |
168 | } |
169 | ||
b36045c1 EW |
170 | static void send_strbuf(struct strbuf *hdr, |
171 | const char *type, struct strbuf *buf) | |
2f4038ab | 172 | { |
b36045c1 EW |
173 | hdr_int(hdr, content_length, buf->len); |
174 | hdr_str(hdr, content_type, type); | |
175 | end_headers(hdr); | |
cdf4fb8e | 176 | write_or_die(1, buf->buf, buf->len); |
2f4038ab SP |
177 | } |
178 | ||
b36045c1 EW |
179 | static void send_local_file(struct strbuf *hdr, const char *the_type, |
180 | const char *name) | |
2f4038ab | 181 | { |
fcd12db6 | 182 | char *p = git_pathdup("%s", name); |
2f4038ab SP |
183 | size_t buf_alloc = 8192; |
184 | char *buf = xmalloc(buf_alloc); | |
185 | int fd; | |
186 | struct stat sb; | |
2f4038ab SP |
187 | |
188 | fd = open(p, O_RDONLY); | |
189 | if (fd < 0) | |
b36045c1 | 190 | not_found(hdr, "Cannot open '%s': %s", p, strerror(errno)); |
2f4038ab SP |
191 | if (fstat(fd, &sb) < 0) |
192 | die_errno("Cannot stat '%s'", p); | |
193 | ||
b36045c1 EW |
194 | hdr_int(hdr, content_length, sb.st_size); |
195 | hdr_str(hdr, content_type, the_type); | |
196 | hdr_date(hdr, last_modified, sb.st_mtime); | |
197 | end_headers(hdr); | |
2f4038ab | 198 | |
4a5328d6 | 199 | for (;;) { |
2f4038ab SP |
200 | ssize_t n = xread(fd, buf, buf_alloc); |
201 | if (n < 0) | |
202 | die_errno("Cannot read '%s'", p); | |
203 | if (!n) | |
204 | break; | |
cdf4fb8e | 205 | write_or_die(1, buf, n); |
2f4038ab SP |
206 | } |
207 | close(fd); | |
208 | free(buf); | |
fcd12db6 | 209 | free(p); |
2f4038ab SP |
210 | } |
211 | ||
b36045c1 | 212 | static void get_text_file(struct strbuf *hdr, char *name) |
2f4038ab | 213 | { |
b36045c1 EW |
214 | select_getanyfile(hdr); |
215 | hdr_nocache(hdr); | |
216 | send_local_file(hdr, "text/plain", name); | |
2f4038ab SP |
217 | } |
218 | ||
b36045c1 | 219 | static void get_loose_object(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-loose-object", name); | |
2f4038ab SP |
224 | } |
225 | ||
b36045c1 | 226 | static void get_pack_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", name); | |
2f4038ab SP |
231 | } |
232 | ||
b36045c1 | 233 | static void get_idx_file(struct strbuf *hdr, char *name) |
2f4038ab | 234 | { |
b36045c1 EW |
235 | select_getanyfile(hdr); |
236 | hdr_cache_forever(hdr); | |
237 | send_local_file(hdr, "application/x-git-packed-objects-toc", name); | |
2f4038ab SP |
238 | } |
239 | ||
6881f0cc | 240 | static void http_config(void) |
556cfa3b | 241 | { |
6881f0cc TA |
242 | int i, value = 0; |
243 | struct strbuf var = STRBUF_INIT; | |
ae021d87 | 244 | |
6881f0cc | 245 | git_config_get_bool("http.getanyfile", &getanyfile); |
6bc0cb51 | 246 | git_config_get_ulong("http.maxrequestbuffer", &max_request_buffer); |
556cfa3b | 247 | |
6881f0cc TA |
248 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { |
249 | struct rpc_service *svc = &rpc_service[i]; | |
250 | strbuf_addf(&var, "http.%s", svc->config_name); | |
251 | if (!git_config_get_bool(var.buf, &value)) | |
252 | svc->enabled = value; | |
253 | strbuf_reset(&var); | |
5abb013b SP |
254 | } |
255 | ||
6881f0cc | 256 | strbuf_release(&var); |
556cfa3b SP |
257 | } |
258 | ||
b36045c1 | 259 | static struct rpc_service *select_service(struct strbuf *hdr, const char *name) |
556cfa3b | 260 | { |
ae021d87 | 261 | const char *svc_name; |
556cfa3b SP |
262 | struct rpc_service *svc = NULL; |
263 | int i; | |
264 | ||
ae021d87 | 265 | if (!skip_prefix(name, "git-", &svc_name)) |
b36045c1 | 266 | forbidden(hdr, "Unsupported service: '%s'", name); |
556cfa3b SP |
267 | |
268 | for (i = 0; i < ARRAY_SIZE(rpc_service); i++) { | |
269 | struct rpc_service *s = &rpc_service[i]; | |
ae021d87 | 270 | if (!strcmp(s->name, svc_name)) { |
556cfa3b SP |
271 | svc = s; |
272 | break; | |
273 | } | |
274 | } | |
275 | ||
276 | if (!svc) | |
b36045c1 | 277 | forbidden(hdr, "Unsupported service: '%s'", name); |
556cfa3b | 278 | |
556cfa3b SP |
279 | if (svc->enabled < 0) { |
280 | const char *user = getenv("REMOTE_USER"); | |
281 | svc->enabled = (user && *user) ? 1 : 0; | |
282 | } | |
283 | if (!svc->enabled) | |
b36045c1 | 284 | forbidden(hdr, "Service not enabled: '%s'", svc->name); |
556cfa3b SP |
285 | return svc; |
286 | } | |
287 | ||
6b1fae1d MK |
288 | static void write_to_child(int out, const unsigned char *buf, ssize_t len, const char *prog_name) |
289 | { | |
290 | if (write_in_full(out, buf, len) < 0) | |
291 | die("unable to write to '%s'", prog_name); | |
292 | } | |
293 | ||
6bc0cb51 JK |
294 | /* |
295 | * This is basically strbuf_read(), except that if we | |
296 | * hit max_request_buffer we die (we'd rather reject a | |
297 | * maliciously large request than chew up infinite memory). | |
298 | */ | |
c79edf73 | 299 | static ssize_t read_request_eof(int fd, unsigned char **out) |
6bc0cb51 JK |
300 | { |
301 | size_t len = 0, alloc = 8192; | |
302 | unsigned char *buf = xmalloc(alloc); | |
303 | ||
304 | if (max_request_buffer < alloc) | |
305 | max_request_buffer = alloc; | |
306 | ||
307 | while (1) { | |
308 | ssize_t cnt; | |
309 | ||
310 | cnt = read_in_full(fd, buf + len, alloc - len); | |
311 | if (cnt < 0) { | |
312 | free(buf); | |
313 | return -1; | |
314 | } | |
315 | ||
316 | /* partial read from read_in_full means we hit EOF */ | |
317 | len += cnt; | |
318 | if (len < alloc) { | |
319 | *out = buf; | |
320 | return len; | |
321 | } | |
322 | ||
323 | /* otherwise, grow and try again (if we can) */ | |
324 | if (alloc == max_request_buffer) | |
325 | die("request was larger than our maximum size (%lu);" | |
326 | " try setting GIT_HTTP_MAX_REQUEST_BUFFER", | |
327 | max_request_buffer); | |
328 | ||
329 | alloc = alloc_nr(alloc); | |
330 | if (alloc > max_request_buffer) | |
331 | alloc = max_request_buffer; | |
332 | REALLOC_ARRAY(buf, alloc); | |
333 | } | |
334 | } | |
335 | ||
c79edf73 MK |
336 | static ssize_t read_request_fixed_len(int fd, ssize_t req_len, unsigned char **out) |
337 | { | |
338 | unsigned char *buf = NULL; | |
339 | ssize_t cnt = 0; | |
340 | ||
341 | if (max_request_buffer < req_len) { | |
342 | die("request was larger than our maximum size (%lu): " | |
343 | "%" PRIuMAX "; try setting GIT_HTTP_MAX_REQUEST_BUFFER", | |
344 | max_request_buffer, (uintmax_t)req_len); | |
345 | } | |
346 | ||
347 | buf = xmalloc(req_len); | |
348 | cnt = read_in_full(fd, buf, req_len); | |
349 | if (cnt < 0) { | |
350 | free(buf); | |
351 | return -1; | |
352 | } | |
353 | *out = buf; | |
354 | return cnt; | |
355 | } | |
356 | ||
357 | static ssize_t get_content_length(void) | |
358 | { | |
359 | ssize_t val = -1; | |
360 | const char *str = getenv("CONTENT_LENGTH"); | |
361 | ||
574c513e | 362 | if (str && *str && !git_parse_ssize_t(str, &val)) |
c79edf73 MK |
363 | die("failed to parse CONTENT_LENGTH: %s", str); |
364 | return val; | |
365 | } | |
366 | ||
367 | static ssize_t read_request(int fd, unsigned char **out, ssize_t req_len) | |
368 | { | |
369 | if (req_len < 0) | |
370 | return read_request_eof(fd, out); | |
371 | else | |
372 | return read_request_fixed_len(fd, req_len, out); | |
373 | } | |
374 | ||
375 | static void inflate_request(const char *prog_name, int out, int buffer_input, ssize_t req_len) | |
556cfa3b | 376 | { |
ef49a7a0 | 377 | git_zstream stream; |
6bc0cb51 | 378 | unsigned char *full_request = NULL; |
556cfa3b SP |
379 | unsigned char in_buf[8192]; |
380 | unsigned char out_buf[8192]; | |
381 | unsigned long cnt = 0; | |
6c213e86 MK |
382 | int req_len_defined = req_len >= 0; |
383 | size_t req_remaining_len = req_len; | |
556cfa3b SP |
384 | |
385 | memset(&stream, 0, sizeof(stream)); | |
5e86c1fb | 386 | git_inflate_init_gzip_only(&stream); |
556cfa3b SP |
387 | |
388 | while (1) { | |
6bc0cb51 JK |
389 | ssize_t n; |
390 | ||
391 | if (buffer_input) { | |
392 | if (full_request) | |
393 | n = 0; /* nothing left to read */ | |
394 | else | |
c79edf73 | 395 | n = read_request(0, &full_request, req_len); |
6bc0cb51 JK |
396 | stream.next_in = full_request; |
397 | } else { | |
6c213e86 MK |
398 | ssize_t buffer_len; |
399 | if (req_len_defined && req_remaining_len <= sizeof(in_buf)) | |
400 | buffer_len = req_remaining_len; | |
401 | else | |
402 | buffer_len = sizeof(in_buf); | |
403 | n = xread(0, in_buf, buffer_len); | |
6bc0cb51 | 404 | stream.next_in = in_buf; |
6c213e86 MK |
405 | if (req_len_defined && n > 0) |
406 | req_remaining_len -= n; | |
6bc0cb51 JK |
407 | } |
408 | ||
556cfa3b SP |
409 | if (n <= 0) |
410 | die("request ended in the middle of the gzip stream"); | |
556cfa3b SP |
411 | stream.avail_in = n; |
412 | ||
413 | while (0 < stream.avail_in) { | |
414 | int ret; | |
415 | ||
416 | stream.next_out = out_buf; | |
417 | stream.avail_out = sizeof(out_buf); | |
418 | ||
9e7e5ca3 | 419 | ret = git_inflate(&stream, Z_NO_FLUSH); |
556cfa3b SP |
420 | if (ret != Z_OK && ret != Z_STREAM_END) |
421 | die("zlib error inflating request, result %d", ret); | |
422 | ||
423 | n = stream.total_out - cnt; | |
6b1fae1d MK |
424 | write_to_child(out, out_buf, stream.total_out - cnt, prog_name); |
425 | cnt = stream.total_out; | |
556cfa3b SP |
426 | |
427 | if (ret == Z_STREAM_END) | |
428 | goto done; | |
429 | } | |
430 | } | |
431 | ||
432 | done: | |
9e7e5ca3 | 433 | git_inflate_end(&stream); |
556cfa3b | 434 | close(out); |
6bc0cb51 JK |
435 | free(full_request); |
436 | } | |
437 | ||
c79edf73 | 438 | static void copy_request(const char *prog_name, int out, ssize_t req_len) |
6bc0cb51 JK |
439 | { |
440 | unsigned char *buf; | |
c79edf73 | 441 | ssize_t n = read_request(0, &buf, req_len); |
6bc0cb51 JK |
442 | if (n < 0) |
443 | die_errno("error reading request body"); | |
6b1fae1d | 444 | write_to_child(out, buf, n, prog_name); |
6bc0cb51 JK |
445 | close(out); |
446 | free(buf); | |
556cfa3b SP |
447 | } |
448 | ||
6c213e86 MK |
449 | static void pipe_fixed_length(const char *prog_name, int out, size_t req_len) |
450 | { | |
451 | unsigned char buf[8192]; | |
452 | size_t remaining_len = req_len; | |
453 | ||
454 | while (remaining_len > 0) { | |
455 | size_t chunk_length = remaining_len > sizeof(buf) ? sizeof(buf) : remaining_len; | |
456 | ssize_t n = xread(0, buf, chunk_length); | |
457 | if (n < 0) | |
458 | die_errno("Reading request failed"); | |
459 | write_to_child(out, buf, n, prog_name); | |
460 | remaining_len -= n; | |
461 | } | |
462 | ||
463 | close(out); | |
464 | } | |
465 | ||
6bc0cb51 | 466 | static void run_service(const char **argv, int buffer_input) |
556cfa3b SP |
467 | { |
468 | const char *encoding = getenv("HTTP_CONTENT_ENCODING"); | |
469 | const char *user = getenv("REMOTE_USER"); | |
470 | const char *host = getenv("REMOTE_ADDR"); | |
556cfa3b | 471 | int gzipped_request = 0; |
d3180279 | 472 | struct child_process cld = CHILD_PROCESS_INIT; |
c79edf73 | 473 | ssize_t req_len = get_content_length(); |
556cfa3b | 474 | |
12144e8f | 475 | if (encoding && (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip"))) |
556cfa3b SP |
476 | gzipped_request = 1; |
477 | ||
478 | if (!user || !*user) | |
479 | user = "anonymous"; | |
480 | if (!host || !*host) | |
481 | host = "(none)"; | |
482 | ||
e32a4581 | 483 | if (!getenv("GIT_COMMITTER_NAME")) |
29fda24d | 484 | strvec_pushf(&cld.env, "GIT_COMMITTER_NAME=%s", user); |
e32a4581 | 485 | if (!getenv("GIT_COMMITTER_EMAIL")) |
29fda24d | 486 | strvec_pushf(&cld.env, |
f6d8942b | 487 | "GIT_COMMITTER_EMAIL=%s@http.%s", user, host); |
556cfa3b | 488 | |
6def0ff8 | 489 | strvec_pushv(&cld.args, argv); |
6c213e86 | 490 | if (buffer_input || gzipped_request || req_len >= 0) |
556cfa3b SP |
491 | cld.in = -1; |
492 | cld.git_cmd = 1; | |
02818a98 MK |
493 | cld.clean_on_exit = 1; |
494 | cld.wait_after_clean = 1; | |
556cfa3b SP |
495 | if (start_command(&cld)) |
496 | exit(1); | |
497 | ||
498 | close(1); | |
499 | if (gzipped_request) | |
c79edf73 | 500 | inflate_request(argv[0], cld.in, buffer_input, req_len); |
6bc0cb51 | 501 | else if (buffer_input) |
c79edf73 | 502 | copy_request(argv[0], cld.in, req_len); |
6c213e86 MK |
503 | else if (req_len >= 0) |
504 | pipe_fixed_length(argv[0], cld.in, req_len); | |
556cfa3b SP |
505 | else |
506 | close(0); | |
507 | ||
508 | if (finish_command(&cld)) | |
509 | exit(1); | |
556cfa3b SP |
510 | } |
511 | ||
f72f5421 | 512 | static int show_text_ref(const char *name, const struct object_id *oid, |
5cf88fd8 | 513 | int flag UNUSED, void *cb_data) |
2f4038ab | 514 | { |
6130f86d | 515 | const char *name_nons = strip_namespace(name); |
2f4038ab | 516 | struct strbuf *buf = cb_data; |
109cd76d | 517 | struct object *o = parse_object(the_repository, oid); |
2f4038ab SP |
518 | if (!o) |
519 | return 0; | |
520 | ||
f72f5421 | 521 | strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons); |
2f4038ab | 522 | if (o->type == OBJ_TAG) { |
a74093da | 523 | o = deref_tag(the_repository, o, name, 0); |
2f4038ab SP |
524 | if (!o) |
525 | return 0; | |
f2fd0760 | 526 | strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid), |
6130f86d | 527 | name_nons); |
2f4038ab SP |
528 | } |
529 | return 0; | |
530 | } | |
531 | ||
2be1506a | 532 | static void get_info_refs(struct strbuf *hdr, char *arg UNUSED) |
2f4038ab | 533 | { |
556cfa3b | 534 | const char *service_name = get_parameter("service"); |
2f4038ab SP |
535 | struct strbuf buf = STRBUF_INIT; |
536 | ||
b36045c1 | 537 | hdr_nocache(hdr); |
556cfa3b SP |
538 | |
539 | if (service_name) { | |
540 | const char *argv[] = {NULL /* service name */, | |
98e2d9d6 | 541 | "--http-backend-info-refs", |
556cfa3b | 542 | ".", NULL}; |
b36045c1 | 543 | struct rpc_service *svc = select_service(hdr, service_name); |
556cfa3b SP |
544 | |
545 | strbuf_addf(&buf, "application/x-git-%s-advertisement", | |
546 | svc->name); | |
b36045c1 EW |
547 | hdr_str(hdr, content_type, buf.buf); |
548 | end_headers(hdr); | |
556cfa3b | 549 | |
237ffedd BW |
550 | |
551 | if (determine_protocol_version_server() != protocol_v2) { | |
552 | packet_write_fmt(1, "# service=git-%s\n", svc->name); | |
553 | packet_flush(1); | |
554 | } | |
556cfa3b SP |
555 | |
556 | argv[0] = svc->name; | |
6bc0cb51 | 557 | run_service(argv, 0); |
556cfa3b SP |
558 | |
559 | } else { | |
b36045c1 | 560 | select_getanyfile(hdr); |
e6bf24d3 | 561 | for_each_namespaced_ref(NULL, show_text_ref, &buf); |
b36045c1 | 562 | send_strbuf(hdr, "text/plain", &buf); |
556cfa3b | 563 | } |
2f4038ab SP |
564 | strbuf_release(&buf); |
565 | } | |
566 | ||
f72f5421 MH |
567 | static int show_head_ref(const char *refname, const struct object_id *oid, |
568 | int flag, void *cb_data) | |
6130f86d JK |
569 | { |
570 | struct strbuf *buf = cb_data; | |
571 | ||
572 | if (flag & REF_ISSYMREF) { | |
7695d118 RS |
573 | const char *target = resolve_ref_unsafe(refname, |
574 | RESOLVE_REF_READING, | |
744c040b | 575 | NULL, NULL); |
6130f86d | 576 | |
7fd12bfb MH |
577 | if (target) |
578 | strbuf_addf(buf, "ref: %s\n", strip_namespace(target)); | |
6130f86d | 579 | } else { |
f72f5421 | 580 | strbuf_addf(buf, "%s\n", oid_to_hex(oid)); |
6130f86d JK |
581 | } |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
2be1506a | 586 | static void get_head(struct strbuf *hdr, char *arg UNUSED) |
6130f86d JK |
587 | { |
588 | struct strbuf buf = STRBUF_INIT; | |
589 | ||
b36045c1 | 590 | select_getanyfile(hdr); |
6130f86d | 591 | head_ref_namespaced(show_head_ref, &buf); |
b36045c1 | 592 | send_strbuf(hdr, "text/plain", &buf); |
6130f86d JK |
593 | strbuf_release(&buf); |
594 | } | |
595 | ||
2be1506a | 596 | static void get_info_packs(struct strbuf *hdr, char *arg UNUSED) |
2f4038ab SP |
597 | { |
598 | size_t objdirlen = strlen(get_object_directory()); | |
599 | struct strbuf buf = STRBUF_INIT; | |
600 | struct packed_git *p; | |
601 | size_t cnt = 0; | |
602 | ||
b36045c1 | 603 | select_getanyfile(hdr); |
454ea2e4 | 604 | for (p = get_all_packs(the_repository); p; p = p->next) { |
2f4038ab SP |
605 | if (p->pack_local) |
606 | cnt++; | |
607 | } | |
608 | ||
609 | strbuf_grow(&buf, cnt * 53 + 2); | |
454ea2e4 | 610 | for (p = get_all_packs(the_repository); p; p = p->next) { |
2f4038ab SP |
611 | if (p->pack_local) |
612 | strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6); | |
613 | } | |
614 | strbuf_addch(&buf, '\n'); | |
615 | ||
b36045c1 EW |
616 | hdr_nocache(hdr); |
617 | send_strbuf(hdr, "text/plain; charset=utf-8", &buf); | |
2f4038ab SP |
618 | strbuf_release(&buf); |
619 | } | |
620 | ||
b36045c1 | 621 | static void check_content_type(struct strbuf *hdr, const char *accepted_type) |
556cfa3b SP |
622 | { |
623 | const char *actual_type = getenv("CONTENT_TYPE"); | |
624 | ||
625 | if (!actual_type) | |
626 | actual_type = ""; | |
627 | ||
628 | if (strcmp(actual_type, accepted_type)) { | |
b36045c1 EW |
629 | http_status(hdr, 415, "Unsupported Media Type"); |
630 | hdr_nocache(hdr); | |
631 | end_headers(hdr); | |
556cfa3b SP |
632 | format_write(1, |
633 | "Expected POST with Content-Type '%s'," | |
634 | " but received '%s' instead.\n", | |
635 | accepted_type, actual_type); | |
636 | exit(0); | |
637 | } | |
638 | } | |
639 | ||
b36045c1 | 640 | static void service_rpc(struct strbuf *hdr, char *service_name) |
556cfa3b SP |
641 | { |
642 | const char *argv[] = {NULL, "--stateless-rpc", ".", NULL}; | |
b36045c1 | 643 | struct rpc_service *svc = select_service(hdr, service_name); |
556cfa3b SP |
644 | struct strbuf buf = STRBUF_INIT; |
645 | ||
646 | strbuf_reset(&buf); | |
647 | strbuf_addf(&buf, "application/x-git-%s-request", svc->name); | |
b36045c1 | 648 | check_content_type(hdr, buf.buf); |
556cfa3b | 649 | |
b36045c1 | 650 | hdr_nocache(hdr); |
556cfa3b SP |
651 | |
652 | strbuf_reset(&buf); | |
653 | strbuf_addf(&buf, "application/x-git-%s-result", svc->name); | |
b36045c1 | 654 | hdr_str(hdr, content_type, buf.buf); |
556cfa3b | 655 | |
b36045c1 | 656 | end_headers(hdr); |
556cfa3b SP |
657 | |
658 | argv[0] = svc->name; | |
6bc0cb51 | 659 | run_service(argv, svc->buffer_input); |
556cfa3b SP |
660 | strbuf_release(&buf); |
661 | } | |
662 | ||
7253a023 | 663 | static int dead; |
2f4038ab SP |
664 | static NORETURN void die_webcgi(const char *err, va_list params) |
665 | { | |
7253a023 | 666 | if (dead <= 1) { |
b36045c1 | 667 | struct strbuf hdr = STRBUF_INIT; |
e081a7c3 | 668 | report_fn die_message_fn = get_die_message_routine(); |
b36045c1 | 669 | |
e081a7c3 | 670 | die_message_fn(err, params); |
2f4038ab | 671 | |
b36045c1 EW |
672 | http_status(&hdr, 500, "Internal Server Error"); |
673 | hdr_nocache(&hdr); | |
674 | end_headers(&hdr); | |
5856b5f5 SP |
675 | } |
676 | exit(0); /* we successfully reported a failure ;-) */ | |
2f4038ab SP |
677 | } |
678 | ||
7253a023 JK |
679 | static int die_webcgi_recursing(void) |
680 | { | |
681 | return dead++ > 1; | |
682 | } | |
683 | ||
917adc03 ML |
684 | static char* getdir(void) |
685 | { | |
686 | struct strbuf buf = STRBUF_INIT; | |
687 | char *pathinfo = getenv("PATH_INFO"); | |
688 | char *root = getenv("GIT_PROJECT_ROOT"); | |
689 | char *path = getenv("PATH_TRANSLATED"); | |
690 | ||
691 | if (root && *root) { | |
692 | if (!pathinfo || !*pathinfo) | |
693 | die("GIT_PROJECT_ROOT is set but PATH_INFO is not"); | |
34b6cb8b SP |
694 | if (daemon_avoid_alias(pathinfo)) |
695 | die("'%s': aliased", pathinfo); | |
cf688cc2 | 696 | end_url_with_slash(&buf, root); |
34b6cb8b SP |
697 | if (pathinfo[0] == '/') |
698 | pathinfo++; | |
917adc03 ML |
699 | strbuf_addstr(&buf, pathinfo); |
700 | return strbuf_detach(&buf, NULL); | |
701 | } else if (path && *path) { | |
702 | return xstrdup(path); | |
703 | } else | |
704 | die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server"); | |
705 | return NULL; | |
706 | } | |
707 | ||
2f4038ab SP |
708 | static struct service_cmd { |
709 | const char *method; | |
710 | const char *pattern; | |
b36045c1 | 711 | void (*imp)(struct strbuf *, char *); |
2f4038ab | 712 | } services[] = { |
6130f86d | 713 | {"GET", "/HEAD$", get_head}, |
2f4038ab SP |
714 | {"GET", "/info/refs$", get_info_refs}, |
715 | {"GET", "/objects/info/alternates$", get_text_file}, | |
716 | {"GET", "/objects/info/http-alternates$", get_text_file}, | |
717 | {"GET", "/objects/info/packs$", get_info_packs}, | |
718 | {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object}, | |
f786ae9f | 719 | {"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{62}$", get_loose_object}, |
2f4038ab | 720 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file}, |
f786ae9f | 721 | {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.pack$", get_pack_file}, |
556cfa3b | 722 | {"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file}, |
f786ae9f | 723 | {"GET", "/objects/pack/pack-[0-9a-f]{64}\\.idx$", get_idx_file}, |
556cfa3b SP |
724 | |
725 | {"POST", "/git-upload-pack$", service_rpc}, | |
726 | {"POST", "/git-receive-pack$", service_rpc} | |
2f4038ab SP |
727 | }; |
728 | ||
b36045c1 EW |
729 | static int bad_request(struct strbuf *hdr, const struct service_cmd *c) |
730 | { | |
731 | const char *proto = getenv("SERVER_PROTOCOL"); | |
732 | ||
733 | if (proto && !strcmp(proto, "HTTP/1.1")) { | |
734 | http_status(hdr, 405, "Method Not Allowed"); | |
735 | hdr_str(hdr, "Allow", | |
736 | !strcmp(c->method, "GET") ? "GET, HEAD" : c->method); | |
737 | } else | |
738 | http_status(hdr, 400, "Bad Request"); | |
739 | hdr_nocache(hdr); | |
740 | end_headers(hdr); | |
741 | return 0; | |
742 | } | |
743 | ||
77ef8b0e | 744 | int cmd_main(int argc UNUSED, const char **argv UNUSED) |
2f4038ab SP |
745 | { |
746 | char *method = getenv("REQUEST_METHOD"); | |
ff6a37c9 | 747 | const char *proto_header; |
917adc03 | 748 | char *dir; |
2f4038ab SP |
749 | struct service_cmd *cmd = NULL; |
750 | char *cmd_arg = NULL; | |
751 | int i; | |
b36045c1 | 752 | struct strbuf hdr = STRBUF_INIT; |
2f4038ab | 753 | |
2f4038ab | 754 | set_die_routine(die_webcgi); |
7253a023 | 755 | set_die_is_recursing_routine(die_webcgi_recursing); |
2f4038ab SP |
756 | |
757 | if (!method) | |
758 | die("No REQUEST_METHOD from server"); | |
759 | if (!strcmp(method, "HEAD")) | |
760 | method = "GET"; | |
917adc03 | 761 | dir = getdir(); |
2f4038ab SP |
762 | |
763 | for (i = 0; i < ARRAY_SIZE(services); i++) { | |
764 | struct service_cmd *c = &services[i]; | |
765 | regex_t re; | |
766 | regmatch_t out[1]; | |
2139bd02 | 767 | int ret; |
2f4038ab SP |
768 | |
769 | if (regcomp(&re, c->pattern, REG_EXTENDED)) | |
770 | die("Bogus regex in service table: %s", c->pattern); | |
2139bd02 ÆAB |
771 | ret = regexec(&re, dir, 1, out, 0); |
772 | regfree(&re); | |
773 | ||
774 | if (!ret) { | |
48aec1b1 | 775 | size_t n; |
2f4038ab | 776 | |
b36045c1 EW |
777 | if (strcmp(method, c->method)) |
778 | return bad_request(&hdr, c); | |
2f4038ab SP |
779 | |
780 | cmd = c; | |
48aec1b1 | 781 | n = out[0].rm_eo - out[0].rm_so; |
5c0b13f8 | 782 | cmd_arg = xmemdupz(dir + out[0].rm_so + 1, n - 1); |
2f4038ab SP |
783 | dir[out[0].rm_so] = 0; |
784 | break; | |
785 | } | |
2f4038ab SP |
786 | } |
787 | ||
788 | if (!cmd) | |
b36045c1 | 789 | not_found(&hdr, "Request not supported: '%s'", dir); |
2f4038ab SP |
790 | |
791 | setup_path(); | |
792 | if (!enter_repo(dir, 0)) | |
b36045c1 | 793 | not_found(&hdr, "Not a git repository: '%s'", dir); |
8b2bd7cd TC |
794 | if (!getenv("GIT_HTTP_EXPORT_ALL") && |
795 | access("git-daemon-export-ok", F_OK) ) | |
b36045c1 | 796 | not_found(&hdr, "Repository not exported: '%s'", dir); |
eef75d24 | 797 | free(dir); |
2f4038ab | 798 | |
6881f0cc | 799 | http_config(); |
6bc0cb51 JK |
800 | max_request_buffer = git_env_ulong("GIT_HTTP_MAX_REQUEST_BUFFER", |
801 | max_request_buffer); | |
ff6a37c9 JK |
802 | proto_header = getenv("HTTP_GIT_PROTOCOL"); |
803 | if (proto_header) | |
804 | setenv(GIT_PROTOCOL_ENVIRONMENT, proto_header, 0); | |
6bc0cb51 | 805 | |
b36045c1 | 806 | cmd->imp(&hdr, cmd_arg); |
eef75d24 | 807 | free(cmd_arg); |
2f4038ab SP |
808 | return 0; |
809 | } |