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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 | |
7 | int max_requests = -1; | |
8 | CURLM *curlm; | |
9 | #endif | |
10 | #ifndef NO_CURL_EASY_DUPHANDLE | |
11 | CURL *curl_default; | |
12 | #endif | |
13 | char curl_errorstr[CURL_ERROR_SIZE]; | |
14 | ||
15 | int curl_ssl_verify = -1; | |
16 | char *ssl_cert = NULL; | |
17 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
18 | char *ssl_key = NULL; | |
19 | #endif | |
20 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
21 | char *ssl_capath = NULL; | |
22 | #endif | |
23 | char *ssl_cainfo = NULL; | |
24 | long curl_low_speed_limit = -1; | |
25 | long curl_low_speed_time = -1; | |
3ea099d4 | 26 | int curl_ftp_no_epsv = 0; |
29508e1e NH |
27 | |
28 | struct curl_slist *pragma_header; | |
29508e1e NH |
29 | |
30 | struct active_request_slot *active_queue_head = NULL; | |
31 | ||
32 | size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, | |
33 | struct buffer *buffer) | |
34 | { | |
35 | size_t size = eltsize * nmemb; | |
36 | if (size > buffer->size - buffer->posn) | |
37 | size = buffer->size - buffer->posn; | |
1d7f171c | 38 | memcpy(ptr, (char *) buffer->buffer + buffer->posn, size); |
29508e1e NH |
39 | buffer->posn += size; |
40 | return size; | |
41 | } | |
42 | ||
43 | size_t fwrite_buffer(const void *ptr, size_t eltsize, | |
44 | size_t nmemb, struct buffer *buffer) | |
45 | { | |
46 | size_t size = eltsize * nmemb; | |
47 | if (size > buffer->size - buffer->posn) { | |
48 | buffer->size = buffer->size * 3 / 2; | |
49 | if (buffer->size < buffer->posn + size) | |
50 | buffer->size = buffer->posn + size; | |
51 | buffer->buffer = xrealloc(buffer->buffer, buffer->size); | |
52 | } | |
1d7f171c | 53 | memcpy((char *) buffer->buffer + buffer->posn, ptr, size); |
29508e1e NH |
54 | buffer->posn += size; |
55 | data_received++; | |
56 | return size; | |
57 | } | |
58 | ||
59 | size_t fwrite_null(const void *ptr, size_t eltsize, | |
60 | size_t nmemb, struct buffer *buffer) | |
61 | { | |
62 | data_received++; | |
63 | return eltsize * nmemb; | |
64 | } | |
65 | ||
66 | static void finish_active_slot(struct active_request_slot *slot); | |
67 | ||
68 | #ifdef USE_CURL_MULTI | |
69 | static void process_curl_messages(void) | |
70 | { | |
71 | int num_messages; | |
72 | struct active_request_slot *slot; | |
73 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
74 | ||
75 | while (curl_message != NULL) { | |
76 | if (curl_message->msg == CURLMSG_DONE) { | |
77 | int curl_result = curl_message->data.result; | |
78 | slot = active_queue_head; | |
79 | while (slot != NULL && | |
80 | slot->curl != curl_message->easy_handle) | |
81 | slot = slot->next; | |
82 | if (slot != NULL) { | |
83 | curl_multi_remove_handle(curlm, slot->curl); | |
84 | slot->curl_result = curl_result; | |
85 | finish_active_slot(slot); | |
86 | } else { | |
87 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
88 | } | |
89 | } else { | |
90 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
91 | (int)curl_message->msg); | |
92 | } | |
93 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
94 | } | |
95 | } | |
96 | #endif | |
97 | ||
98 | static int http_options(const char *var, const char *value) | |
99 | { | |
100 | if (!strcmp("http.sslverify", var)) { | |
101 | if (curl_ssl_verify == -1) { | |
102 | curl_ssl_verify = git_config_bool(var, value); | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
107 | if (!strcmp("http.sslcert", var)) { | |
108 | if (ssl_cert == NULL) { | |
109 | ssl_cert = xmalloc(strlen(value)+1); | |
110 | strcpy(ssl_cert, value); | |
111 | } | |
112 | return 0; | |
113 | } | |
114 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
115 | if (!strcmp("http.sslkey", var)) { | |
116 | if (ssl_key == NULL) { | |
117 | ssl_key = xmalloc(strlen(value)+1); | |
118 | strcpy(ssl_key, value); | |
119 | } | |
120 | return 0; | |
121 | } | |
122 | #endif | |
123 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
124 | if (!strcmp("http.sslcapath", var)) { | |
125 | if (ssl_capath == NULL) { | |
126 | ssl_capath = xmalloc(strlen(value)+1); | |
127 | strcpy(ssl_capath, value); | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | #endif | |
132 | if (!strcmp("http.sslcainfo", var)) { | |
133 | if (ssl_cainfo == NULL) { | |
134 | ssl_cainfo = xmalloc(strlen(value)+1); | |
135 | strcpy(ssl_cainfo, value); | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | #ifdef USE_CURL_MULTI | |
141 | if (!strcmp("http.maxrequests", var)) { | |
142 | if (max_requests == -1) | |
143 | max_requests = git_config_int(var, value); | |
144 | return 0; | |
145 | } | |
146 | #endif | |
147 | ||
148 | if (!strcmp("http.lowspeedlimit", var)) { | |
149 | if (curl_low_speed_limit == -1) | |
150 | curl_low_speed_limit = (long)git_config_int(var, value); | |
151 | return 0; | |
152 | } | |
153 | if (!strcmp("http.lowspeedtime", var)) { | |
154 | if (curl_low_speed_time == -1) | |
155 | curl_low_speed_time = (long)git_config_int(var, value); | |
156 | return 0; | |
157 | } | |
158 | ||
3ea099d4 SK |
159 | if (!strcmp("http.noepsv", var)) { |
160 | curl_ftp_no_epsv = git_config_bool(var, value); | |
161 | return 0; | |
162 | } | |
163 | ||
29508e1e NH |
164 | /* Fall back on the default ones */ |
165 | return git_default_config(var, value); | |
166 | } | |
167 | ||
11979b98 JH |
168 | static CURL* get_curl_handle(void) |
169 | { | |
170 | CURL* result = curl_easy_init(); | |
171 | ||
172 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify); | |
173 | #if LIBCURL_VERSION_NUM >= 0x070907 | |
174 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
175 | #endif | |
176 | ||
177 | if (ssl_cert != NULL) | |
178 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
179 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
180 | if (ssl_key != NULL) | |
181 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
182 | #endif | |
183 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
184 | if (ssl_capath != NULL) | |
185 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
186 | #endif | |
187 | if (ssl_cainfo != NULL) | |
188 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
189 | curl_easy_setopt(result, CURLOPT_FAILONERROR, 1); | |
190 | ||
191 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
192 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
193 | curl_low_speed_limit); | |
194 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
195 | curl_low_speed_time); | |
196 | } | |
197 | ||
198 | curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); | |
199 | ||
7982d74e MW |
200 | if (getenv("GIT_CURL_VERBOSE")) |
201 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1); | |
202 | ||
20fc9bc5 NH |
203 | curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT); |
204 | ||
3ea099d4 SK |
205 | if (curl_ftp_no_epsv) |
206 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
207 | ||
11979b98 JH |
208 | return result; |
209 | } | |
210 | ||
29508e1e NH |
211 | void http_init(void) |
212 | { | |
213 | char *low_speed_limit; | |
214 | char *low_speed_time; | |
215 | ||
216 | curl_global_init(CURL_GLOBAL_ALL); | |
217 | ||
218 | pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); | |
29508e1e NH |
219 | |
220 | #ifdef USE_CURL_MULTI | |
221 | { | |
222 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
223 | if (http_max_requests != NULL) | |
224 | max_requests = atoi(http_max_requests); | |
225 | } | |
226 | ||
227 | curlm = curl_multi_init(); | |
228 | if (curlm == NULL) { | |
229 | fprintf(stderr, "Error creating curl multi handle.\n"); | |
230 | exit(1); | |
231 | } | |
232 | #endif | |
233 | ||
234 | if (getenv("GIT_SSL_NO_VERIFY")) | |
235 | curl_ssl_verify = 0; | |
236 | ||
237 | ssl_cert = getenv("GIT_SSL_CERT"); | |
238 | #if LIBCURL_VERSION_NUM >= 0x070902 | |
239 | ssl_key = getenv("GIT_SSL_KEY"); | |
240 | #endif | |
241 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
242 | ssl_capath = getenv("GIT_SSL_CAPATH"); | |
243 | #endif | |
244 | ssl_cainfo = getenv("GIT_SSL_CAINFO"); | |
245 | ||
246 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
247 | if (low_speed_limit != NULL) | |
248 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
249 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
250 | if (low_speed_time != NULL) | |
251 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
252 | ||
253 | git_config(http_options); | |
254 | ||
255 | if (curl_ssl_verify == -1) | |
256 | curl_ssl_verify = 1; | |
257 | ||
258 | #ifdef USE_CURL_MULTI | |
259 | if (max_requests < 1) | |
260 | max_requests = DEFAULT_MAX_REQUESTS; | |
261 | #endif | |
262 | ||
3ea099d4 SK |
263 | if (getenv("GIT_CURL_FTP_NO_EPSV")) |
264 | curl_ftp_no_epsv = 1; | |
265 | ||
29508e1e NH |
266 | #ifndef NO_CURL_EASY_DUPHANDLE |
267 | curl_default = get_curl_handle(); | |
268 | #endif | |
269 | } | |
270 | ||
271 | void http_cleanup(void) | |
272 | { | |
273 | struct active_request_slot *slot = active_queue_head; | |
274 | #ifdef USE_CURL_MULTI | |
275 | char *wait_url; | |
29508e1e NH |
276 | #endif |
277 | ||
278 | while (slot != NULL) { | |
279 | #ifdef USE_CURL_MULTI | |
280 | if (slot->in_use) { | |
281 | curl_easy_getinfo(slot->curl, | |
282 | CURLINFO_EFFECTIVE_URL, | |
283 | &wait_url); | |
284 | fprintf(stderr, "Waiting for %s\n", wait_url); | |
285 | run_active_slot(slot); | |
286 | } | |
287 | #endif | |
288 | if (slot->curl != NULL) | |
289 | curl_easy_cleanup(slot->curl); | |
290 | slot = slot->next; | |
291 | } | |
292 | ||
293 | #ifndef NO_CURL_EASY_DUPHANDLE | |
294 | curl_easy_cleanup(curl_default); | |
295 | #endif | |
296 | ||
297 | #ifdef USE_CURL_MULTI | |
298 | curl_multi_cleanup(curlm); | |
299 | #endif | |
300 | curl_global_cleanup(); | |
b3ca4e4e NH |
301 | |
302 | curl_slist_free_all(pragma_header); | |
29508e1e NH |
303 | } |
304 | ||
29508e1e NH |
305 | struct active_request_slot *get_active_slot(void) |
306 | { | |
307 | struct active_request_slot *slot = active_queue_head; | |
308 | struct active_request_slot *newslot; | |
309 | ||
310 | #ifdef USE_CURL_MULTI | |
311 | int num_transfers; | |
312 | ||
313 | /* Wait for a slot to open up if the queue is full */ | |
314 | while (active_requests >= max_requests) { | |
315 | curl_multi_perform(curlm, &num_transfers); | |
316 | if (num_transfers < active_requests) { | |
317 | process_curl_messages(); | |
318 | } | |
319 | } | |
320 | #endif | |
321 | ||
322 | while (slot != NULL && slot->in_use) { | |
323 | slot = slot->next; | |
324 | } | |
325 | if (slot == NULL) { | |
326 | newslot = xmalloc(sizeof(*newslot)); | |
327 | newslot->curl = NULL; | |
328 | newslot->in_use = 0; | |
329 | newslot->next = NULL; | |
330 | ||
331 | slot = active_queue_head; | |
332 | if (slot == NULL) { | |
333 | active_queue_head = newslot; | |
334 | } else { | |
335 | while (slot->next != NULL) { | |
336 | slot = slot->next; | |
337 | } | |
338 | slot->next = newslot; | |
339 | } | |
340 | slot = newslot; | |
341 | } | |
342 | ||
343 | if (slot->curl == NULL) { | |
344 | #ifdef NO_CURL_EASY_DUPHANDLE | |
345 | slot->curl = get_curl_handle(); | |
346 | #else | |
347 | slot->curl = curl_easy_duphandle(curl_default); | |
348 | #endif | |
349 | } | |
350 | ||
351 | active_requests++; | |
352 | slot->in_use = 1; | |
353 | slot->local = NULL; | |
c8568e13 | 354 | slot->results = NULL; |
baa7b67d | 355 | slot->finished = NULL; |
29508e1e NH |
356 | slot->callback_data = NULL; |
357 | slot->callback_func = NULL; | |
9094950d | 358 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); |
29508e1e | 359 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); |
29508e1e | 360 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); |
9094950d NH |
361 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); |
362 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
363 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
364 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
365 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
29508e1e NH |
366 | |
367 | return slot; | |
368 | } | |
369 | ||
370 | int start_active_slot(struct active_request_slot *slot) | |
371 | { | |
372 | #ifdef USE_CURL_MULTI | |
373 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
374 | ||
375 | if (curlm_result != CURLM_OK && | |
376 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
377 | active_requests--; | |
378 | slot->in_use = 0; | |
379 | return 0; | |
380 | } | |
381 | #endif | |
382 | return 1; | |
383 | } | |
384 | ||
385 | #ifdef USE_CURL_MULTI | |
386 | void step_active_slots(void) | |
387 | { | |
388 | int num_transfers; | |
389 | CURLMcode curlm_result; | |
390 | ||
391 | do { | |
392 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
393 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
394 | if (num_transfers < active_requests) { | |
395 | process_curl_messages(); | |
396 | fill_active_slots(); | |
397 | } | |
398 | } | |
399 | #endif | |
400 | ||
401 | void run_active_slot(struct active_request_slot *slot) | |
402 | { | |
403 | #ifdef USE_CURL_MULTI | |
404 | long last_pos = 0; | |
405 | long current_pos; | |
406 | fd_set readfds; | |
407 | fd_set writefds; | |
408 | fd_set excfds; | |
409 | int max_fd; | |
410 | struct timeval select_timeout; | |
baa7b67d | 411 | int finished = 0; |
29508e1e | 412 | |
baa7b67d NH |
413 | slot->finished = &finished; |
414 | while (!finished) { | |
29508e1e NH |
415 | data_received = 0; |
416 | step_active_slots(); | |
417 | ||
418 | if (!data_received && slot->local != NULL) { | |
419 | current_pos = ftell(slot->local); | |
420 | if (current_pos > last_pos) | |
421 | data_received++; | |
422 | last_pos = current_pos; | |
423 | } | |
424 | ||
425 | if (slot->in_use && !data_received) { | |
426 | max_fd = 0; | |
427 | FD_ZERO(&readfds); | |
428 | FD_ZERO(&writefds); | |
429 | FD_ZERO(&excfds); | |
430 | select_timeout.tv_sec = 0; | |
431 | select_timeout.tv_usec = 50000; | |
432 | select(max_fd, &readfds, &writefds, | |
433 | &excfds, &select_timeout); | |
434 | } | |
435 | } | |
436 | #else | |
437 | while (slot->in_use) { | |
438 | slot->curl_result = curl_easy_perform(slot->curl); | |
439 | finish_active_slot(slot); | |
440 | } | |
441 | #endif | |
442 | } | |
443 | ||
53f31389 | 444 | static void closedown_active_slot(struct active_request_slot *slot) |
29508e1e NH |
445 | { |
446 | active_requests--; | |
447 | slot->in_use = 0; | |
53f31389 MW |
448 | } |
449 | ||
450 | void release_active_slot(struct active_request_slot *slot) | |
451 | { | |
452 | closedown_active_slot(slot); | |
453 | if (slot->curl) { | |
b3ca4e4e | 454 | #ifdef USE_CURL_MULTI |
53f31389 | 455 | curl_multi_remove_handle(curlm, slot->curl); |
b3ca4e4e | 456 | #endif |
53f31389 MW |
457 | curl_easy_cleanup(slot->curl); |
458 | slot->curl = NULL; | |
459 | } | |
b3ca4e4e | 460 | #ifdef USE_CURL_MULTI |
53f31389 | 461 | fill_active_slots(); |
b3ca4e4e | 462 | #endif |
53f31389 MW |
463 | } |
464 | ||
465 | static void finish_active_slot(struct active_request_slot *slot) | |
466 | { | |
467 | closedown_active_slot(slot); | |
29508e1e | 468 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); |
c8568e13 | 469 | |
baa7b67d NH |
470 | if (slot->finished != NULL) |
471 | (*slot->finished) = 1; | |
472 | ||
c8568e13 NH |
473 | /* Store slot results so they can be read after the slot is reused */ |
474 | if (slot->results != NULL) { | |
475 | slot->results->curl_result = slot->curl_result; | |
476 | slot->results->http_code = slot->http_code; | |
477 | } | |
478 | ||
29508e1e NH |
479 | /* Run callback if appropriate */ |
480 | if (slot->callback_func != NULL) { | |
481 | slot->callback_func(slot->callback_data); | |
482 | } | |
483 | } | |
484 | ||
485 | void finish_all_active_slots(void) | |
486 | { | |
487 | struct active_request_slot *slot = active_queue_head; | |
488 | ||
489 | while (slot != NULL) | |
490 | if (slot->in_use) { | |
491 | run_active_slot(slot); | |
492 | slot = active_queue_head; | |
493 | } else { | |
494 | slot = slot->next; | |
495 | } | |
496 | } |