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Commit | Line | Data |
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29508e1e NH |
1 | #include "http.h" |
2 | ||
3 | int data_received; | |
4 | int active_requests = 0; | |
5 | ||
6 | #ifdef USE_CURL_MULTI | |
cc3530e8 MH |
7 | static int max_requests = -1; |
8 | static CURLM *curlm; | |
29508e1e NH |
9 | #endif |
10 | #ifndef NO_CURL_EASY_DUPHANDLE | |
cc3530e8 | 11 | static CURL *curl_default; |
29508e1e NH |
12 | #endif |
13 | char curl_errorstr[CURL_ERROR_SIZE]; | |
14 | ||
cc3530e8 MH |
15 | static int curl_ssl_verify = -1; |
16 | static char *ssl_cert = NULL; | |
29508e1e | 17 | #if LIBCURL_VERSION_NUM >= 0x070902 |
cc3530e8 | 18 | static char *ssl_key = NULL; |
29508e1e NH |
19 | #endif |
20 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
cc3530e8 | 21 | static char *ssl_capath = NULL; |
29508e1e | 22 | #endif |
cc3530e8 MH |
23 | static char *ssl_cainfo = NULL; |
24 | static long curl_low_speed_limit = -1; | |
25 | static long curl_low_speed_time = -1; | |
26 | static int curl_ftp_no_epsv = 0; | |
27 | static char *curl_http_proxy = NULL; | |
29508e1e | 28 | |
cc3530e8 | 29 | static struct curl_slist *pragma_header; |
29508e1e | 30 | |
cc3530e8 | 31 | static struct active_request_slot *active_queue_head = NULL; |
29508e1e NH |
32 | |
33 | size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, | |
34 | struct buffer *buffer) | |
35 | { | |
36 | size_t size = eltsize * nmemb; | |
028c2976 MH |
37 | if (size > buffer->buf.len - buffer->posn) |
38 | size = buffer->buf.len - buffer->posn; | |
39 | memcpy(ptr, buffer->buf.buf + buffer->posn, size); | |
29508e1e | 40 | buffer->posn += size; |
028c2976 | 41 | |
29508e1e NH |
42 | return size; |
43 | } | |
44 | ||
45 | size_t fwrite_buffer(const void *ptr, size_t eltsize, | |
028c2976 | 46 | size_t nmemb, struct strbuf *buffer) |
29508e1e NH |
47 | { |
48 | size_t size = eltsize * nmemb; | |
028c2976 | 49 | strbuf_add(buffer, ptr, size); |
29508e1e NH |
50 | data_received++; |
51 | return size; | |
52 | } | |
53 | ||
54 | size_t fwrite_null(const void *ptr, size_t eltsize, | |
028c2976 | 55 | size_t nmemb, struct strbuf *buffer) |
29508e1e NH |
56 | { |
57 | data_received++; | |
58 | return eltsize * nmemb; | |
59 | } | |
60 | ||
61 | static void finish_active_slot(struct active_request_slot *slot); | |
62 | ||
63 | #ifdef USE_CURL_MULTI | |
64 | static void process_curl_messages(void) | |
65 | { | |
66 | int num_messages; | |
67 | struct active_request_slot *slot; | |
68 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
69 | ||
70 | while (curl_message != NULL) { | |
71 | if (curl_message->msg == CURLMSG_DONE) { | |
72 | int curl_result = curl_message->data.result; | |
73 | slot = active_queue_head; | |
74 | while (slot != NULL && | |
75 | slot->curl != curl_message->easy_handle) | |
76 | slot = slot->next; | |
77 | if (slot != NULL) { | |
78 | curl_multi_remove_handle(curlm, slot->curl); | |
79 | slot->curl_result = curl_result; | |
80 | finish_active_slot(slot); | |
81 | } else { | |
82 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
83 | } | |
84 | } else { | |
85 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
86 | (int)curl_message->msg); | |
87 | } | |
88 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
89 | } | |
90 | } | |
91 | #endif | |
92 | ||
93 | static int http_options(const char *var, const char *value) | |
94 | { | |
95 | if (!strcmp("http.sslverify", var)) { | |
96 | if (curl_ssl_verify == -1) { | |
97 | curl_ssl_verify = git_config_bool(var, value); | |
98 | } | |
99 | return 0; | |
100 | } | |
101 | ||
102 | if (!strcmp("http.sslcert", var)) { | |
103 | if (ssl_cert == NULL) { | |
104 | ssl_cert = xmalloc(strlen(value)+1); | |
105 | strcpy(ssl_cert, value); | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
110 | if (!strcmp("http.sslkey", var)) { | |
111 | if (ssl_key == NULL) { | |
112 | ssl_key = xmalloc(strlen(value)+1); | |
113 | strcpy(ssl_key, value); | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | #endif | |
118 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
119 | if (!strcmp("http.sslcapath", var)) { | |
120 | if (ssl_capath == NULL) { | |
121 | ssl_capath = xmalloc(strlen(value)+1); | |
122 | strcpy(ssl_capath, value); | |
123 | } | |
124 | return 0; | |
125 | } | |
126 | #endif | |
127 | if (!strcmp("http.sslcainfo", var)) { | |
128 | if (ssl_cainfo == NULL) { | |
129 | ssl_cainfo = xmalloc(strlen(value)+1); | |
130 | strcpy(ssl_cainfo, value); | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
a6080a0a | 135 | #ifdef USE_CURL_MULTI |
29508e1e NH |
136 | if (!strcmp("http.maxrequests", var)) { |
137 | if (max_requests == -1) | |
138 | max_requests = git_config_int(var, value); | |
139 | return 0; | |
140 | } | |
141 | #endif | |
142 | ||
143 | if (!strcmp("http.lowspeedlimit", var)) { | |
144 | if (curl_low_speed_limit == -1) | |
145 | curl_low_speed_limit = (long)git_config_int(var, value); | |
146 | return 0; | |
147 | } | |
148 | if (!strcmp("http.lowspeedtime", var)) { | |
149 | if (curl_low_speed_time == -1) | |
150 | curl_low_speed_time = (long)git_config_int(var, value); | |
151 | return 0; | |
152 | } | |
153 | ||
3ea099d4 SK |
154 | if (!strcmp("http.noepsv", var)) { |
155 | curl_ftp_no_epsv = git_config_bool(var, value); | |
156 | return 0; | |
157 | } | |
9c5665aa SV |
158 | if (!strcmp("http.proxy", var)) { |
159 | if (curl_http_proxy == NULL) { | |
160 | curl_http_proxy = xmalloc(strlen(value)+1); | |
161 | strcpy(curl_http_proxy, value); | |
162 | } | |
163 | return 0; | |
164 | } | |
3ea099d4 | 165 | |
29508e1e NH |
166 | /* Fall back on the default ones */ |
167 | return git_default_config(var, value); | |
168 | } | |
169 | ||
11979b98 JH |
170 | static CURL* get_curl_handle(void) |
171 | { | |
172 | CURL* result = curl_easy_init(); | |
173 | ||
174 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify); | |
175 | #if LIBCURL_VERSION_NUM >= 0x070907 | |
176 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
177 | #endif | |
178 | ||
179 | if (ssl_cert != NULL) | |
180 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
181 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
182 | if (ssl_key != NULL) | |
183 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
184 | #endif | |
185 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
186 | if (ssl_capath != NULL) | |
187 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
188 | #endif | |
189 | if (ssl_cainfo != NULL) | |
190 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
191 | curl_easy_setopt(result, CURLOPT_FAILONERROR, 1); | |
192 | ||
193 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
194 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
195 | curl_low_speed_limit); | |
196 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
197 | curl_low_speed_time); | |
198 | } | |
199 | ||
200 | curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); | |
201 | ||
7982d74e MW |
202 | if (getenv("GIT_CURL_VERBOSE")) |
203 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1); | |
204 | ||
20fc9bc5 NH |
205 | curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT); |
206 | ||
3ea099d4 SK |
207 | if (curl_ftp_no_epsv) |
208 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
209 | ||
9c5665aa SV |
210 | if (curl_http_proxy) |
211 | curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); | |
212 | ||
11979b98 JH |
213 | return result; |
214 | } | |
215 | ||
29508e1e NH |
216 | void http_init(void) |
217 | { | |
218 | char *low_speed_limit; | |
219 | char *low_speed_time; | |
220 | ||
221 | curl_global_init(CURL_GLOBAL_ALL); | |
222 | ||
223 | pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); | |
29508e1e NH |
224 | |
225 | #ifdef USE_CURL_MULTI | |
226 | { | |
227 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
228 | if (http_max_requests != NULL) | |
229 | max_requests = atoi(http_max_requests); | |
230 | } | |
231 | ||
232 | curlm = curl_multi_init(); | |
233 | if (curlm == NULL) { | |
234 | fprintf(stderr, "Error creating curl multi handle.\n"); | |
235 | exit(1); | |
236 | } | |
237 | #endif | |
238 | ||
239 | if (getenv("GIT_SSL_NO_VERIFY")) | |
240 | curl_ssl_verify = 0; | |
241 | ||
242 | ssl_cert = getenv("GIT_SSL_CERT"); | |
243 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
244 | ssl_key = getenv("GIT_SSL_KEY"); | |
245 | #endif | |
246 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
247 | ssl_capath = getenv("GIT_SSL_CAPATH"); | |
248 | #endif | |
249 | ssl_cainfo = getenv("GIT_SSL_CAINFO"); | |
250 | ||
251 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
252 | if (low_speed_limit != NULL) | |
253 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
254 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
255 | if (low_speed_time != NULL) | |
256 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
257 | ||
258 | git_config(http_options); | |
259 | ||
260 | if (curl_ssl_verify == -1) | |
261 | curl_ssl_verify = 1; | |
262 | ||
263 | #ifdef USE_CURL_MULTI | |
264 | if (max_requests < 1) | |
265 | max_requests = DEFAULT_MAX_REQUESTS; | |
266 | #endif | |
267 | ||
3ea099d4 SK |
268 | if (getenv("GIT_CURL_FTP_NO_EPSV")) |
269 | curl_ftp_no_epsv = 1; | |
270 | ||
29508e1e NH |
271 | #ifndef NO_CURL_EASY_DUPHANDLE |
272 | curl_default = get_curl_handle(); | |
273 | #endif | |
274 | } | |
275 | ||
276 | void http_cleanup(void) | |
277 | { | |
278 | struct active_request_slot *slot = active_queue_head; | |
279 | #ifdef USE_CURL_MULTI | |
280 | char *wait_url; | |
29508e1e NH |
281 | #endif |
282 | ||
283 | while (slot != NULL) { | |
3278cd0a | 284 | struct active_request_slot *next = slot->next; |
29508e1e NH |
285 | #ifdef USE_CURL_MULTI |
286 | if (slot->in_use) { | |
287 | curl_easy_getinfo(slot->curl, | |
288 | CURLINFO_EFFECTIVE_URL, | |
289 | &wait_url); | |
290 | fprintf(stderr, "Waiting for %s\n", wait_url); | |
291 | run_active_slot(slot); | |
292 | } | |
293 | #endif | |
294 | if (slot->curl != NULL) | |
295 | curl_easy_cleanup(slot->curl); | |
3278cd0a SP |
296 | free(slot); |
297 | slot = next; | |
29508e1e | 298 | } |
3278cd0a | 299 | active_queue_head = NULL; |
29508e1e NH |
300 | |
301 | #ifndef NO_CURL_EASY_DUPHANDLE | |
302 | curl_easy_cleanup(curl_default); | |
303 | #endif | |
304 | ||
305 | #ifdef USE_CURL_MULTI | |
306 | curl_multi_cleanup(curlm); | |
307 | #endif | |
308 | curl_global_cleanup(); | |
b3ca4e4e NH |
309 | |
310 | curl_slist_free_all(pragma_header); | |
3278cd0a | 311 | pragma_header = NULL; |
29508e1e NH |
312 | } |
313 | ||
29508e1e NH |
314 | struct active_request_slot *get_active_slot(void) |
315 | { | |
316 | struct active_request_slot *slot = active_queue_head; | |
317 | struct active_request_slot *newslot; | |
318 | ||
319 | #ifdef USE_CURL_MULTI | |
320 | int num_transfers; | |
321 | ||
322 | /* Wait for a slot to open up if the queue is full */ | |
323 | while (active_requests >= max_requests) { | |
324 | curl_multi_perform(curlm, &num_transfers); | |
325 | if (num_transfers < active_requests) { | |
326 | process_curl_messages(); | |
327 | } | |
328 | } | |
329 | #endif | |
330 | ||
331 | while (slot != NULL && slot->in_use) { | |
332 | slot = slot->next; | |
333 | } | |
334 | if (slot == NULL) { | |
335 | newslot = xmalloc(sizeof(*newslot)); | |
336 | newslot->curl = NULL; | |
337 | newslot->in_use = 0; | |
338 | newslot->next = NULL; | |
339 | ||
340 | slot = active_queue_head; | |
341 | if (slot == NULL) { | |
342 | active_queue_head = newslot; | |
343 | } else { | |
344 | while (slot->next != NULL) { | |
345 | slot = slot->next; | |
346 | } | |
347 | slot->next = newslot; | |
348 | } | |
349 | slot = newslot; | |
350 | } | |
351 | ||
352 | if (slot->curl == NULL) { | |
353 | #ifdef NO_CURL_EASY_DUPHANDLE | |
354 | slot->curl = get_curl_handle(); | |
355 | #else | |
356 | slot->curl = curl_easy_duphandle(curl_default); | |
357 | #endif | |
358 | } | |
359 | ||
360 | active_requests++; | |
361 | slot->in_use = 1; | |
362 | slot->local = NULL; | |
c8568e13 | 363 | slot->results = NULL; |
baa7b67d | 364 | slot->finished = NULL; |
29508e1e NH |
365 | slot->callback_data = NULL; |
366 | slot->callback_func = NULL; | |
367 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); | |
29508e1e | 368 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); |
9094950d NH |
369 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); |
370 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
371 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
372 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
373 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
29508e1e NH |
374 | |
375 | return slot; | |
376 | } | |
377 | ||
378 | int start_active_slot(struct active_request_slot *slot) | |
379 | { | |
380 | #ifdef USE_CURL_MULTI | |
381 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
45c17412 | 382 | int num_transfers; |
29508e1e NH |
383 | |
384 | if (curlm_result != CURLM_OK && | |
385 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
386 | active_requests--; | |
387 | slot->in_use = 0; | |
388 | return 0; | |
389 | } | |
45c17412 DB |
390 | |
391 | /* | |
392 | * We know there must be something to do, since we just added | |
393 | * something. | |
394 | */ | |
395 | curl_multi_perform(curlm, &num_transfers); | |
29508e1e NH |
396 | #endif |
397 | return 1; | |
398 | } | |
399 | ||
400 | #ifdef USE_CURL_MULTI | |
fc57b6aa DB |
401 | struct fill_chain { |
402 | void *data; | |
403 | int (*fill)(void *); | |
404 | struct fill_chain *next; | |
405 | }; | |
406 | ||
407 | static struct fill_chain *fill_cfg = NULL; | |
408 | ||
409 | void add_fill_function(void *data, int (*fill)(void *)) | |
410 | { | |
411 | struct fill_chain *new = malloc(sizeof(*new)); | |
412 | struct fill_chain **linkp = &fill_cfg; | |
413 | new->data = data; | |
414 | new->fill = fill; | |
415 | new->next = NULL; | |
416 | while (*linkp) | |
417 | linkp = &(*linkp)->next; | |
418 | *linkp = new; | |
419 | } | |
420 | ||
45c17412 DB |
421 | void fill_active_slots(void) |
422 | { | |
423 | struct active_request_slot *slot = active_queue_head; | |
424 | ||
fc57b6aa DB |
425 | while (active_requests < max_requests) { |
426 | struct fill_chain *fill; | |
427 | for (fill = fill_cfg; fill; fill = fill->next) | |
428 | if (fill->fill(fill->data)) | |
429 | break; | |
430 | ||
431 | if (!fill) | |
45c17412 | 432 | break; |
fc57b6aa | 433 | } |
45c17412 DB |
434 | |
435 | while (slot != NULL) { | |
436 | if (!slot->in_use && slot->curl != NULL) { | |
437 | curl_easy_cleanup(slot->curl); | |
438 | slot->curl = NULL; | |
439 | } | |
440 | slot = slot->next; | |
441 | } | |
442 | } | |
443 | ||
29508e1e NH |
444 | void step_active_slots(void) |
445 | { | |
446 | int num_transfers; | |
447 | CURLMcode curlm_result; | |
448 | ||
449 | do { | |
450 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
451 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
452 | if (num_transfers < active_requests) { | |
453 | process_curl_messages(); | |
454 | fill_active_slots(); | |
455 | } | |
456 | } | |
457 | #endif | |
458 | ||
459 | void run_active_slot(struct active_request_slot *slot) | |
460 | { | |
461 | #ifdef USE_CURL_MULTI | |
462 | long last_pos = 0; | |
463 | long current_pos; | |
464 | fd_set readfds; | |
465 | fd_set writefds; | |
466 | fd_set excfds; | |
467 | int max_fd; | |
468 | struct timeval select_timeout; | |
baa7b67d | 469 | int finished = 0; |
29508e1e | 470 | |
baa7b67d NH |
471 | slot->finished = &finished; |
472 | while (!finished) { | |
29508e1e NH |
473 | data_received = 0; |
474 | step_active_slots(); | |
475 | ||
476 | if (!data_received && slot->local != NULL) { | |
477 | current_pos = ftell(slot->local); | |
478 | if (current_pos > last_pos) | |
479 | data_received++; | |
480 | last_pos = current_pos; | |
481 | } | |
482 | ||
483 | if (slot->in_use && !data_received) { | |
484 | max_fd = 0; | |
485 | FD_ZERO(&readfds); | |
486 | FD_ZERO(&writefds); | |
487 | FD_ZERO(&excfds); | |
488 | select_timeout.tv_sec = 0; | |
489 | select_timeout.tv_usec = 50000; | |
490 | select(max_fd, &readfds, &writefds, | |
491 | &excfds, &select_timeout); | |
492 | } | |
493 | } | |
494 | #else | |
495 | while (slot->in_use) { | |
496 | slot->curl_result = curl_easy_perform(slot->curl); | |
497 | finish_active_slot(slot); | |
498 | } | |
499 | #endif | |
500 | } | |
501 | ||
53f31389 | 502 | static void closedown_active_slot(struct active_request_slot *slot) |
29508e1e | 503 | { |
028c2976 MH |
504 | active_requests--; |
505 | slot->in_use = 0; | |
53f31389 MW |
506 | } |
507 | ||
508 | void release_active_slot(struct active_request_slot *slot) | |
509 | { | |
510 | closedown_active_slot(slot); | |
511 | if (slot->curl) { | |
b3ca4e4e | 512 | #ifdef USE_CURL_MULTI |
53f31389 | 513 | curl_multi_remove_handle(curlm, slot->curl); |
b3ca4e4e | 514 | #endif |
53f31389 MW |
515 | curl_easy_cleanup(slot->curl); |
516 | slot->curl = NULL; | |
517 | } | |
b3ca4e4e | 518 | #ifdef USE_CURL_MULTI |
53f31389 | 519 | fill_active_slots(); |
b3ca4e4e | 520 | #endif |
53f31389 MW |
521 | } |
522 | ||
523 | static void finish_active_slot(struct active_request_slot *slot) | |
524 | { | |
525 | closedown_active_slot(slot); | |
028c2976 | 526 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); |
c8568e13 | 527 | |
baa7b67d NH |
528 | if (slot->finished != NULL) |
529 | (*slot->finished) = 1; | |
530 | ||
c8568e13 NH |
531 | /* Store slot results so they can be read after the slot is reused */ |
532 | if (slot->results != NULL) { | |
533 | slot->results->curl_result = slot->curl_result; | |
534 | slot->results->http_code = slot->http_code; | |
535 | } | |
536 | ||
028c2976 MH |
537 | /* Run callback if appropriate */ |
538 | if (slot->callback_func != NULL) { | |
539 | slot->callback_func(slot->callback_data); | |
540 | } | |
29508e1e NH |
541 | } |
542 | ||
543 | void finish_all_active_slots(void) | |
544 | { | |
545 | struct active_request_slot *slot = active_queue_head; | |
546 | ||
547 | while (slot != NULL) | |
548 | if (slot->in_use) { | |
549 | run_active_slot(slot); | |
550 | slot = active_queue_head; | |
551 | } else { | |
552 | slot = slot->next; | |
553 | } | |
554 | } | |
d7e92806 MH |
555 | |
556 | static inline int needs_quote(int ch) | |
557 | { | |
558 | if (((ch >= 'A') && (ch <= 'Z')) | |
559 | || ((ch >= 'a') && (ch <= 'z')) | |
560 | || ((ch >= '0') && (ch <= '9')) | |
561 | || (ch == '/') | |
562 | || (ch == '-') | |
563 | || (ch == '.')) | |
564 | return 0; | |
565 | return 1; | |
566 | } | |
567 | ||
568 | static inline int hex(int v) | |
569 | { | |
570 | if (v < 10) return '0' + v; | |
571 | else return 'A' + v - 10; | |
572 | } | |
573 | ||
574 | static char *quote_ref_url(const char *base, const char *ref) | |
575 | { | |
576 | const char *cp; | |
577 | char *dp, *qref; | |
578 | int len, baselen, ch; | |
579 | ||
580 | baselen = strlen(base); | |
581 | len = baselen + 7; /* "/refs/" + NUL */ | |
582 | for (cp = ref; (ch = *cp) != 0; cp++, len++) | |
583 | if (needs_quote(ch)) | |
584 | len += 2; /* extra two hex plus replacement % */ | |
585 | qref = xmalloc(len); | |
586 | memcpy(qref, base, baselen); | |
587 | memcpy(qref + baselen, "/refs/", 6); | |
588 | for (cp = ref, dp = qref + baselen + 6; (ch = *cp) != 0; cp++) { | |
589 | if (needs_quote(ch)) { | |
590 | *dp++ = '%'; | |
591 | *dp++ = hex((ch >> 4) & 0xF); | |
592 | *dp++ = hex(ch & 0xF); | |
593 | } | |
594 | else | |
595 | *dp++ = ch; | |
596 | } | |
597 | *dp = 0; | |
598 | ||
599 | return qref; | |
600 | } | |
601 | ||
602 | int http_fetch_ref(const char *base, const char *ref, unsigned char *sha1) | |
603 | { | |
604 | char *url; | |
605 | struct strbuf buffer = STRBUF_INIT; | |
606 | struct active_request_slot *slot; | |
607 | struct slot_results results; | |
608 | int ret; | |
609 | ||
610 | url = quote_ref_url(base, ref); | |
611 | slot = get_active_slot(); | |
612 | slot->results = &results; | |
613 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
614 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); | |
615 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); | |
616 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
617 | if (start_active_slot(slot)) { | |
618 | run_active_slot(slot); | |
619 | if (results.curl_result == CURLE_OK) { | |
620 | strbuf_rtrim(&buffer); | |
621 | if (buffer.len == 40) | |
622 | ret = get_sha1_hex(buffer.buf, sha1); | |
623 | else | |
624 | ret = 1; | |
625 | } else { | |
626 | ret = error("Couldn't get %s for %s\n%s", | |
627 | url, ref, curl_errorstr); | |
628 | } | |
629 | } else { | |
630 | ret = error("Unable to start request"); | |
631 | } | |
632 | ||
633 | strbuf_release(&buffer); | |
634 | free(url); | |
635 | return ret; | |
636 | } |