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1 | #include "http.h" | |
2 | ||
3 | int data_received; | |
4 | int active_requests; | |
5 | ||
6 | #ifdef USE_CURL_MULTI | |
7 | static int max_requests = -1; | |
8 | static CURLM *curlm; | |
9 | #endif | |
10 | #ifndef NO_CURL_EASY_DUPHANDLE | |
11 | static CURL *curl_default; | |
12 | #endif | |
13 | char curl_errorstr[CURL_ERROR_SIZE]; | |
14 | ||
15 | static int curl_ssl_verify = -1; | |
16 | static const char *ssl_cert; | |
17 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
18 | static const char *ssl_key; | |
19 | #endif | |
20 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
21 | static const char *ssl_capath; | |
22 | #endif | |
23 | static const char *ssl_cainfo; | |
24 | static long curl_low_speed_limit = -1; | |
25 | static long curl_low_speed_time = -1; | |
26 | static int curl_ftp_no_epsv; | |
27 | static const char *curl_http_proxy; | |
28 | static char *user_name, *user_pass; | |
29 | ||
30 | static struct curl_slist *pragma_header; | |
31 | ||
32 | static struct active_request_slot *active_queue_head; | |
33 | ||
34 | size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
35 | { | |
36 | size_t size = eltsize * nmemb; | |
37 | struct buffer *buffer = buffer_; | |
38 | ||
39 | if (size > buffer->buf.len - buffer->posn) | |
40 | size = buffer->buf.len - buffer->posn; | |
41 | memcpy(ptr, buffer->buf.buf + buffer->posn, size); | |
42 | buffer->posn += size; | |
43 | ||
44 | return size; | |
45 | } | |
46 | ||
47 | #ifndef NO_CURL_IOCTL | |
48 | curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp) | |
49 | { | |
50 | struct buffer *buffer = clientp; | |
51 | ||
52 | switch (cmd) { | |
53 | case CURLIOCMD_NOP: | |
54 | return CURLIOE_OK; | |
55 | ||
56 | case CURLIOCMD_RESTARTREAD: | |
57 | buffer->posn = 0; | |
58 | return CURLIOE_OK; | |
59 | ||
60 | default: | |
61 | return CURLIOE_UNKNOWNCMD; | |
62 | } | |
63 | } | |
64 | #endif | |
65 | ||
66 | size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
67 | { | |
68 | size_t size = eltsize * nmemb; | |
69 | struct strbuf *buffer = buffer_; | |
70 | ||
71 | strbuf_add(buffer, ptr, size); | |
72 | data_received++; | |
73 | return size; | |
74 | } | |
75 | ||
76 | size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf) | |
77 | { | |
78 | data_received++; | |
79 | return eltsize * nmemb; | |
80 | } | |
81 | ||
82 | static void finish_active_slot(struct active_request_slot *slot); | |
83 | ||
84 | #ifdef USE_CURL_MULTI | |
85 | static void process_curl_messages(void) | |
86 | { | |
87 | int num_messages; | |
88 | struct active_request_slot *slot; | |
89 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
90 | ||
91 | while (curl_message != NULL) { | |
92 | if (curl_message->msg == CURLMSG_DONE) { | |
93 | int curl_result = curl_message->data.result; | |
94 | slot = active_queue_head; | |
95 | while (slot != NULL && | |
96 | slot->curl != curl_message->easy_handle) | |
97 | slot = slot->next; | |
98 | if (slot != NULL) { | |
99 | curl_multi_remove_handle(curlm, slot->curl); | |
100 | slot->curl_result = curl_result; | |
101 | finish_active_slot(slot); | |
102 | } else { | |
103 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
104 | } | |
105 | } else { | |
106 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
107 | (int)curl_message->msg); | |
108 | } | |
109 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
110 | } | |
111 | } | |
112 | #endif | |
113 | ||
114 | static int http_options(const char *var, const char *value, void *cb) | |
115 | { | |
116 | if (!strcmp("http.sslverify", var)) { | |
117 | curl_ssl_verify = git_config_bool(var, value); | |
118 | return 0; | |
119 | } | |
120 | if (!strcmp("http.sslcert", var)) | |
121 | return git_config_string(&ssl_cert, var, value); | |
122 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
123 | if (!strcmp("http.sslkey", var)) | |
124 | return git_config_string(&ssl_key, var, value); | |
125 | #endif | |
126 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
127 | if (!strcmp("http.sslcapath", var)) | |
128 | return git_config_string(&ssl_capath, var, value); | |
129 | #endif | |
130 | if (!strcmp("http.sslcainfo", var)) | |
131 | return git_config_string(&ssl_cainfo, var, value); | |
132 | #ifdef USE_CURL_MULTI | |
133 | if (!strcmp("http.maxrequests", var)) { | |
134 | max_requests = git_config_int(var, value); | |
135 | return 0; | |
136 | } | |
137 | #endif | |
138 | if (!strcmp("http.lowspeedlimit", var)) { | |
139 | curl_low_speed_limit = (long)git_config_int(var, value); | |
140 | return 0; | |
141 | } | |
142 | if (!strcmp("http.lowspeedtime", var)) { | |
143 | curl_low_speed_time = (long)git_config_int(var, value); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | if (!strcmp("http.noepsv", var)) { | |
148 | curl_ftp_no_epsv = git_config_bool(var, value); | |
149 | return 0; | |
150 | } | |
151 | if (!strcmp("http.proxy", var)) | |
152 | return git_config_string(&curl_http_proxy, var, value); | |
153 | ||
154 | /* Fall back on the default ones */ | |
155 | return git_default_config(var, value, cb); | |
156 | } | |
157 | ||
158 | static void init_curl_http_auth(CURL *result) | |
159 | { | |
160 | if (user_name) { | |
161 | struct strbuf up = STRBUF_INIT; | |
162 | if (!user_pass) | |
163 | user_pass = xstrdup(getpass("Password: ")); | |
164 | strbuf_addf(&up, "%s:%s", user_name, user_pass); | |
165 | curl_easy_setopt(result, CURLOPT_USERPWD, | |
166 | strbuf_detach(&up, NULL)); | |
167 | } | |
168 | } | |
169 | ||
170 | static CURL *get_curl_handle(void) | |
171 | { | |
172 | CURL *result = curl_easy_init(); | |
173 | ||
174 | if (!curl_ssl_verify) { | |
175 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0); | |
176 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0); | |
177 | } else { | |
178 | /* Verify authenticity of the peer's certificate */ | |
179 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1); | |
180 | /* The name in the cert must match whom we tried to connect */ | |
181 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2); | |
182 | } | |
183 | ||
184 | #if LIBCURL_VERSION_NUM >= 0x070907 | |
185 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
186 | #endif | |
187 | ||
188 | init_curl_http_auth(result); | |
189 | ||
190 | if (ssl_cert != NULL) | |
191 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
192 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
193 | if (ssl_key != NULL) | |
194 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
195 | #endif | |
196 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
197 | if (ssl_capath != NULL) | |
198 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
199 | #endif | |
200 | if (ssl_cainfo != NULL) | |
201 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
202 | curl_easy_setopt(result, CURLOPT_FAILONERROR, 1); | |
203 | ||
204 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
205 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
206 | curl_low_speed_limit); | |
207 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
208 | curl_low_speed_time); | |
209 | } | |
210 | ||
211 | curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); | |
212 | ||
213 | if (getenv("GIT_CURL_VERBOSE")) | |
214 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1); | |
215 | ||
216 | curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT); | |
217 | ||
218 | if (curl_ftp_no_epsv) | |
219 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
220 | ||
221 | if (curl_http_proxy) | |
222 | curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); | |
223 | ||
224 | return result; | |
225 | } | |
226 | ||
227 | static void http_auth_init(const char *url) | |
228 | { | |
229 | char *at, *colon, *cp, *slash; | |
230 | int len; | |
231 | ||
232 | cp = strstr(url, "://"); | |
233 | if (!cp) | |
234 | return; | |
235 | ||
236 | /* | |
237 | * Ok, the URL looks like "proto://something". Which one? | |
238 | * "proto://<user>:<pass>@<host>/...", | |
239 | * "proto://<user>@<host>/...", or just | |
240 | * "proto://<host>/..."? | |
241 | */ | |
242 | cp += 3; | |
243 | at = strchr(cp, '@'); | |
244 | colon = strchr(cp, ':'); | |
245 | slash = strchrnul(cp, '/'); | |
246 | if (!at || slash <= at) | |
247 | return; /* No credentials */ | |
248 | if (!colon || at <= colon) { | |
249 | /* Only username */ | |
250 | len = at - cp; | |
251 | user_name = xmalloc(len + 1); | |
252 | memcpy(user_name, cp, len); | |
253 | user_name[len] = '\0'; | |
254 | user_pass = NULL; | |
255 | } else { | |
256 | len = colon - cp; | |
257 | user_name = xmalloc(len + 1); | |
258 | memcpy(user_name, cp, len); | |
259 | user_name[len] = '\0'; | |
260 | len = at - (colon + 1); | |
261 | user_pass = xmalloc(len + 1); | |
262 | memcpy(user_pass, colon + 1, len); | |
263 | user_pass[len] = '\0'; | |
264 | } | |
265 | } | |
266 | ||
267 | static void set_from_env(const char **var, const char *envname) | |
268 | { | |
269 | const char *val = getenv(envname); | |
270 | if (val) | |
271 | *var = val; | |
272 | } | |
273 | ||
274 | void http_init(struct remote *remote) | |
275 | { | |
276 | char *low_speed_limit; | |
277 | char *low_speed_time; | |
278 | ||
279 | git_config(http_options, NULL); | |
280 | ||
281 | curl_global_init(CURL_GLOBAL_ALL); | |
282 | ||
283 | if (remote && remote->http_proxy) | |
284 | curl_http_proxy = xstrdup(remote->http_proxy); | |
285 | ||
286 | pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); | |
287 | ||
288 | #ifdef USE_CURL_MULTI | |
289 | { | |
290 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
291 | if (http_max_requests != NULL) | |
292 | max_requests = atoi(http_max_requests); | |
293 | } | |
294 | ||
295 | curlm = curl_multi_init(); | |
296 | if (curlm == NULL) { | |
297 | fprintf(stderr, "Error creating curl multi handle.\n"); | |
298 | exit(1); | |
299 | } | |
300 | #endif | |
301 | ||
302 | if (getenv("GIT_SSL_NO_VERIFY")) | |
303 | curl_ssl_verify = 0; | |
304 | ||
305 | set_from_env(&ssl_cert, "GIT_SSL_CERT"); | |
306 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
307 | set_from_env(&ssl_key, "GIT_SSL_KEY"); | |
308 | #endif | |
309 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
310 | set_from_env(&ssl_capath, "GIT_SSL_CAPATH"); | |
311 | #endif | |
312 | set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO"); | |
313 | ||
314 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
315 | if (low_speed_limit != NULL) | |
316 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
317 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
318 | if (low_speed_time != NULL) | |
319 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
320 | ||
321 | if (curl_ssl_verify == -1) | |
322 | curl_ssl_verify = 1; | |
323 | ||
324 | #ifdef USE_CURL_MULTI | |
325 | if (max_requests < 1) | |
326 | max_requests = DEFAULT_MAX_REQUESTS; | |
327 | #endif | |
328 | ||
329 | if (getenv("GIT_CURL_FTP_NO_EPSV")) | |
330 | curl_ftp_no_epsv = 1; | |
331 | ||
332 | if (remote && remote->url && remote->url[0]) | |
333 | http_auth_init(remote->url[0]); | |
334 | ||
335 | #ifndef NO_CURL_EASY_DUPHANDLE | |
336 | curl_default = get_curl_handle(); | |
337 | #endif | |
338 | } | |
339 | ||
340 | void http_cleanup(void) | |
341 | { | |
342 | struct active_request_slot *slot = active_queue_head; | |
343 | ||
344 | while (slot != NULL) { | |
345 | struct active_request_slot *next = slot->next; | |
346 | if (slot->curl != NULL) { | |
347 | #ifdef USE_CURL_MULTI | |
348 | curl_multi_remove_handle(curlm, slot->curl); | |
349 | #endif | |
350 | curl_easy_cleanup(slot->curl); | |
351 | } | |
352 | free(slot); | |
353 | slot = next; | |
354 | } | |
355 | active_queue_head = NULL; | |
356 | ||
357 | #ifndef NO_CURL_EASY_DUPHANDLE | |
358 | curl_easy_cleanup(curl_default); | |
359 | #endif | |
360 | ||
361 | #ifdef USE_CURL_MULTI | |
362 | curl_multi_cleanup(curlm); | |
363 | #endif | |
364 | curl_global_cleanup(); | |
365 | ||
366 | curl_slist_free_all(pragma_header); | |
367 | pragma_header = NULL; | |
368 | ||
369 | if (curl_http_proxy) { | |
370 | free((void *)curl_http_proxy); | |
371 | curl_http_proxy = NULL; | |
372 | } | |
373 | } | |
374 | ||
375 | struct active_request_slot *get_active_slot(void) | |
376 | { | |
377 | struct active_request_slot *slot = active_queue_head; | |
378 | struct active_request_slot *newslot; | |
379 | ||
380 | #ifdef USE_CURL_MULTI | |
381 | int num_transfers; | |
382 | ||
383 | /* Wait for a slot to open up if the queue is full */ | |
384 | while (active_requests >= max_requests) { | |
385 | curl_multi_perform(curlm, &num_transfers); | |
386 | if (num_transfers < active_requests) | |
387 | process_curl_messages(); | |
388 | } | |
389 | #endif | |
390 | ||
391 | while (slot != NULL && slot->in_use) | |
392 | slot = slot->next; | |
393 | ||
394 | if (slot == NULL) { | |
395 | newslot = xmalloc(sizeof(*newslot)); | |
396 | newslot->curl = NULL; | |
397 | newslot->in_use = 0; | |
398 | newslot->next = NULL; | |
399 | ||
400 | slot = active_queue_head; | |
401 | if (slot == NULL) { | |
402 | active_queue_head = newslot; | |
403 | } else { | |
404 | while (slot->next != NULL) | |
405 | slot = slot->next; | |
406 | slot->next = newslot; | |
407 | } | |
408 | slot = newslot; | |
409 | } | |
410 | ||
411 | if (slot->curl == NULL) { | |
412 | #ifdef NO_CURL_EASY_DUPHANDLE | |
413 | slot->curl = get_curl_handle(); | |
414 | #else | |
415 | slot->curl = curl_easy_duphandle(curl_default); | |
416 | #endif | |
417 | } | |
418 | ||
419 | active_requests++; | |
420 | slot->in_use = 1; | |
421 | slot->local = NULL; | |
422 | slot->results = NULL; | |
423 | slot->finished = NULL; | |
424 | slot->callback_data = NULL; | |
425 | slot->callback_func = NULL; | |
426 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); | |
427 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); | |
428 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); | |
429 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
430 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
431 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
432 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
433 | ||
434 | return slot; | |
435 | } | |
436 | ||
437 | int start_active_slot(struct active_request_slot *slot) | |
438 | { | |
439 | #ifdef USE_CURL_MULTI | |
440 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
441 | int num_transfers; | |
442 | ||
443 | if (curlm_result != CURLM_OK && | |
444 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
445 | active_requests--; | |
446 | slot->in_use = 0; | |
447 | return 0; | |
448 | } | |
449 | ||
450 | /* | |
451 | * We know there must be something to do, since we just added | |
452 | * something. | |
453 | */ | |
454 | curl_multi_perform(curlm, &num_transfers); | |
455 | #endif | |
456 | return 1; | |
457 | } | |
458 | ||
459 | #ifdef USE_CURL_MULTI | |
460 | struct fill_chain { | |
461 | void *data; | |
462 | int (*fill)(void *); | |
463 | struct fill_chain *next; | |
464 | }; | |
465 | ||
466 | static struct fill_chain *fill_cfg; | |
467 | ||
468 | void add_fill_function(void *data, int (*fill)(void *)) | |
469 | { | |
470 | struct fill_chain *new = xmalloc(sizeof(*new)); | |
471 | struct fill_chain **linkp = &fill_cfg; | |
472 | new->data = data; | |
473 | new->fill = fill; | |
474 | new->next = NULL; | |
475 | while (*linkp) | |
476 | linkp = &(*linkp)->next; | |
477 | *linkp = new; | |
478 | } | |
479 | ||
480 | void fill_active_slots(void) | |
481 | { | |
482 | struct active_request_slot *slot = active_queue_head; | |
483 | ||
484 | while (active_requests < max_requests) { | |
485 | struct fill_chain *fill; | |
486 | for (fill = fill_cfg; fill; fill = fill->next) | |
487 | if (fill->fill(fill->data)) | |
488 | break; | |
489 | ||
490 | if (!fill) | |
491 | break; | |
492 | } | |
493 | ||
494 | while (slot != NULL) { | |
495 | if (!slot->in_use && slot->curl != NULL) { | |
496 | curl_easy_cleanup(slot->curl); | |
497 | slot->curl = NULL; | |
498 | } | |
499 | slot = slot->next; | |
500 | } | |
501 | } | |
502 | ||
503 | void step_active_slots(void) | |
504 | { | |
505 | int num_transfers; | |
506 | CURLMcode curlm_result; | |
507 | ||
508 | do { | |
509 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
510 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
511 | if (num_transfers < active_requests) { | |
512 | process_curl_messages(); | |
513 | fill_active_slots(); | |
514 | } | |
515 | } | |
516 | #endif | |
517 | ||
518 | void run_active_slot(struct active_request_slot *slot) | |
519 | { | |
520 | #ifdef USE_CURL_MULTI | |
521 | long last_pos = 0; | |
522 | long current_pos; | |
523 | fd_set readfds; | |
524 | fd_set writefds; | |
525 | fd_set excfds; | |
526 | int max_fd; | |
527 | struct timeval select_timeout; | |
528 | int finished = 0; | |
529 | ||
530 | slot->finished = &finished; | |
531 | while (!finished) { | |
532 | data_received = 0; | |
533 | step_active_slots(); | |
534 | ||
535 | if (!data_received && slot->local != NULL) { | |
536 | current_pos = ftell(slot->local); | |
537 | if (current_pos > last_pos) | |
538 | data_received++; | |
539 | last_pos = current_pos; | |
540 | } | |
541 | ||
542 | if (slot->in_use && !data_received) { | |
543 | max_fd = 0; | |
544 | FD_ZERO(&readfds); | |
545 | FD_ZERO(&writefds); | |
546 | FD_ZERO(&excfds); | |
547 | select_timeout.tv_sec = 0; | |
548 | select_timeout.tv_usec = 50000; | |
549 | select(max_fd, &readfds, &writefds, | |
550 | &excfds, &select_timeout); | |
551 | } | |
552 | } | |
553 | #else | |
554 | while (slot->in_use) { | |
555 | slot->curl_result = curl_easy_perform(slot->curl); | |
556 | finish_active_slot(slot); | |
557 | } | |
558 | #endif | |
559 | } | |
560 | ||
561 | static void closedown_active_slot(struct active_request_slot *slot) | |
562 | { | |
563 | active_requests--; | |
564 | slot->in_use = 0; | |
565 | } | |
566 | ||
567 | void release_active_slot(struct active_request_slot *slot) | |
568 | { | |
569 | closedown_active_slot(slot); | |
570 | if (slot->curl) { | |
571 | #ifdef USE_CURL_MULTI | |
572 | curl_multi_remove_handle(curlm, slot->curl); | |
573 | #endif | |
574 | curl_easy_cleanup(slot->curl); | |
575 | slot->curl = NULL; | |
576 | } | |
577 | #ifdef USE_CURL_MULTI | |
578 | fill_active_slots(); | |
579 | #endif | |
580 | } | |
581 | ||
582 | static void finish_active_slot(struct active_request_slot *slot) | |
583 | { | |
584 | closedown_active_slot(slot); | |
585 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); | |
586 | ||
587 | if (slot->finished != NULL) | |
588 | (*slot->finished) = 1; | |
589 | ||
590 | /* Store slot results so they can be read after the slot is reused */ | |
591 | if (slot->results != NULL) { | |
592 | slot->results->curl_result = slot->curl_result; | |
593 | slot->results->http_code = slot->http_code; | |
594 | } | |
595 | ||
596 | /* Run callback if appropriate */ | |
597 | if (slot->callback_func != NULL) | |
598 | slot->callback_func(slot->callback_data); | |
599 | } | |
600 | ||
601 | void finish_all_active_slots(void) | |
602 | { | |
603 | struct active_request_slot *slot = active_queue_head; | |
604 | ||
605 | while (slot != NULL) | |
606 | if (slot->in_use) { | |
607 | run_active_slot(slot); | |
608 | slot = active_queue_head; | |
609 | } else { | |
610 | slot = slot->next; | |
611 | } | |
612 | } | |
613 | ||
614 | static inline int needs_quote(int ch) | |
615 | { | |
616 | if (((ch >= 'A') && (ch <= 'Z')) | |
617 | || ((ch >= 'a') && (ch <= 'z')) | |
618 | || ((ch >= '0') && (ch <= '9')) | |
619 | || (ch == '/') | |
620 | || (ch == '-') | |
621 | || (ch == '.')) | |
622 | return 0; | |
623 | return 1; | |
624 | } | |
625 | ||
626 | static inline int hex(int v) | |
627 | { | |
628 | if (v < 10) | |
629 | return '0' + v; | |
630 | else | |
631 | return 'A' + v - 10; | |
632 | } | |
633 | ||
634 | static char *quote_ref_url(const char *base, const char *ref) | |
635 | { | |
636 | struct strbuf buf = STRBUF_INIT; | |
637 | const char *cp; | |
638 | int ch; | |
639 | ||
640 | strbuf_addstr(&buf, base); | |
641 | if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/') | |
642 | strbuf_addstr(&buf, "/"); | |
643 | ||
644 | for (cp = ref; (ch = *cp) != 0; cp++) | |
645 | if (needs_quote(ch)) | |
646 | strbuf_addf(&buf, "%%%02x", ch); | |
647 | else | |
648 | strbuf_addch(&buf, *cp); | |
649 | ||
650 | return strbuf_detach(&buf, NULL); | |
651 | } | |
652 | ||
653 | int http_fetch_ref(const char *base, struct ref *ref) | |
654 | { | |
655 | char *url; | |
656 | struct strbuf buffer = STRBUF_INIT; | |
657 | struct active_request_slot *slot; | |
658 | struct slot_results results; | |
659 | int ret; | |
660 | ||
661 | url = quote_ref_url(base, ref->name); | |
662 | slot = get_active_slot(); | |
663 | slot->results = &results; | |
664 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
665 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); | |
666 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); | |
667 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
668 | if (start_active_slot(slot)) { | |
669 | run_active_slot(slot); | |
670 | if (results.curl_result == CURLE_OK) { | |
671 | strbuf_rtrim(&buffer); | |
672 | if (buffer.len == 40) | |
673 | ret = get_sha1_hex(buffer.buf, ref->old_sha1); | |
674 | else if (!prefixcmp(buffer.buf, "ref: ")) { | |
675 | ref->symref = xstrdup(buffer.buf + 5); | |
676 | ret = 0; | |
677 | } else | |
678 | ret = 1; | |
679 | } else { | |
680 | ret = error("Couldn't get %s for %s\n%s", | |
681 | url, ref->name, curl_errorstr); | |
682 | } | |
683 | } else { | |
684 | ret = error("Unable to start request"); | |
685 | } | |
686 | ||
687 | strbuf_release(&buffer); | |
688 | free(url); | |
689 | return ret; | |
690 | } |