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