http-push: fix revision walk
[git/git.git] / http.c
CommitLineData
29508e1e
NH
1#include "http.h"
2
3int data_received;
4int active_requests = 0;
5
6#ifdef USE_CURL_MULTI
7int max_requests = -1;
8CURLM *curlm;
9#endif
10#ifndef NO_CURL_EASY_DUPHANDLE
11CURL *curl_default;
12#endif
13char curl_errorstr[CURL_ERROR_SIZE];
14
15int curl_ssl_verify = -1;
16char *ssl_cert = NULL;
17#if LIBCURL_VERSION_NUM >= 0x070902
18char *ssl_key = NULL;
19#endif
20#if LIBCURL_VERSION_NUM >= 0x070908
21char *ssl_capath = NULL;
22#endif
23char *ssl_cainfo = NULL;
24long curl_low_speed_limit = -1;
25long curl_low_speed_time = -1;
26
27struct curl_slist *pragma_header;
28struct curl_slist *no_range_header;
29
30struct active_request_slot *active_queue_head = NULL;
31
32size_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;
38 memcpy(ptr, buffer->buffer + buffer->posn, size);
39 buffer->posn += size;
40 return size;
41}
42
43size_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 }
53 memcpy(buffer->buffer + buffer->posn, ptr, size);
54 buffer->posn += size;
55 data_received++;
56 return size;
57}
58
59size_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
66static void finish_active_slot(struct active_request_slot *slot);
67
68#ifdef USE_CURL_MULTI
69static 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
98static 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
159 /* Fall back on the default ones */
160 return git_default_config(var, value);
161}
162
11979b98
JH
163static CURL* get_curl_handle(void)
164{
165 CURL* result = curl_easy_init();
166
167 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
168#if LIBCURL_VERSION_NUM >= 0x070907
169 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
170#endif
171
172 if (ssl_cert != NULL)
173 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
174#if LIBCURL_VERSION_NUM >= 0x070902
175 if (ssl_key != NULL)
176 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
177#endif
178#if LIBCURL_VERSION_NUM >= 0x070908
179 if (ssl_capath != NULL)
180 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
181#endif
182 if (ssl_cainfo != NULL)
183 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
184 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
185
186 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
187 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
188 curl_low_speed_limit);
189 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
190 curl_low_speed_time);
191 }
192
193 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
194
7982d74e
MW
195 if (getenv("GIT_CURL_VERBOSE"))
196 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
197
11979b98
JH
198 return result;
199}
200
29508e1e
NH
201void http_init(void)
202{
203 char *low_speed_limit;
204 char *low_speed_time;
205
206 curl_global_init(CURL_GLOBAL_ALL);
207
208 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
209 no_range_header = curl_slist_append(no_range_header, "Range:");
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
259void 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
292struct 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;
29508e1e
NH
342 slot->callback_data = NULL;
343 slot->callback_func = NULL;
344 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
345 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_range_header);
346 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
347
348 return slot;
349}
350
351int start_active_slot(struct active_request_slot *slot)
352{
353#ifdef USE_CURL_MULTI
354 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
355
356 if (curlm_result != CURLM_OK &&
357 curlm_result != CURLM_CALL_MULTI_PERFORM) {
358 active_requests--;
359 slot->in_use = 0;
360 return 0;
361 }
362#endif
363 return 1;
364}
365
366#ifdef USE_CURL_MULTI
367void step_active_slots(void)
368{
369 int num_transfers;
370 CURLMcode curlm_result;
371
372 do {
373 curlm_result = curl_multi_perform(curlm, &num_transfers);
374 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
375 if (num_transfers < active_requests) {
376 process_curl_messages();
377 fill_active_slots();
378 }
379}
380#endif
381
382void run_active_slot(struct active_request_slot *slot)
383{
384#ifdef USE_CURL_MULTI
385 long last_pos = 0;
386 long current_pos;
387 fd_set readfds;
388 fd_set writefds;
389 fd_set excfds;
390 int max_fd;
391 struct timeval select_timeout;
392
393 while (slot->in_use) {
394 data_received = 0;
395 step_active_slots();
396
397 if (!data_received && slot->local != NULL) {
398 current_pos = ftell(slot->local);
399 if (current_pos > last_pos)
400 data_received++;
401 last_pos = current_pos;
402 }
403
404 if (slot->in_use && !data_received) {
405 max_fd = 0;
406 FD_ZERO(&readfds);
407 FD_ZERO(&writefds);
408 FD_ZERO(&excfds);
409 select_timeout.tv_sec = 0;
410 select_timeout.tv_usec = 50000;
411 select(max_fd, &readfds, &writefds,
412 &excfds, &select_timeout);
413 }
414 }
415#else
416 while (slot->in_use) {
417 slot->curl_result = curl_easy_perform(slot->curl);
418 finish_active_slot(slot);
419 }
420#endif
421}
422
53f31389 423static void closedown_active_slot(struct active_request_slot *slot)
29508e1e
NH
424{
425 active_requests--;
426 slot->in_use = 0;
53f31389
MW
427}
428
429void release_active_slot(struct active_request_slot *slot)
430{
431 closedown_active_slot(slot);
432 if (slot->curl) {
433 curl_multi_remove_handle(curlm, slot->curl);
434 curl_easy_cleanup(slot->curl);
435 slot->curl = NULL;
436 }
437 fill_active_slots();
438}
439
440static void finish_active_slot(struct active_request_slot *slot)
441{
442 closedown_active_slot(slot);
29508e1e 443 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
c8568e13
NH
444
445 /* Store slot results so they can be read after the slot is reused */
446 if (slot->results != NULL) {
447 slot->results->curl_result = slot->curl_result;
448 slot->results->http_code = slot->http_code;
449 }
450
29508e1e
NH
451 /* Run callback if appropriate */
452 if (slot->callback_func != NULL) {
453 slot->callback_func(slot->callback_data);
454 }
455}
456
457void finish_all_active_slots(void)
458{
459 struct active_request_slot *slot = active_queue_head;
460
461 while (slot != NULL)
462 if (slot->in_use) {
463 run_active_slot(slot);
464 slot = active_queue_head;
465 } else {
466 slot = slot->next;
467 }
468}