Fix various memory leaks in http-push.c and http-walker.c
[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
cc3530e8
MH
7static int max_requests = -1;
8static CURLM *curlm;
29508e1e
NH
9#endif
10#ifndef NO_CURL_EASY_DUPHANDLE
cc3530e8 11static CURL *curl_default;
29508e1e
NH
12#endif
13char curl_errorstr[CURL_ERROR_SIZE];
14
cc3530e8
MH
15static int curl_ssl_verify = -1;
16static char *ssl_cert = NULL;
29508e1e 17#if LIBCURL_VERSION_NUM >= 0x070902
cc3530e8 18static char *ssl_key = NULL;
29508e1e
NH
19#endif
20#if LIBCURL_VERSION_NUM >= 0x070908
cc3530e8 21static char *ssl_capath = NULL;
29508e1e 22#endif
cc3530e8
MH
23static char *ssl_cainfo = NULL;
24static long curl_low_speed_limit = -1;
25static long curl_low_speed_time = -1;
26static int curl_ftp_no_epsv = 0;
27static char *curl_http_proxy = NULL;
29508e1e 28
cc3530e8 29static struct curl_slist *pragma_header;
29508e1e 30
cc3530e8 31static struct active_request_slot *active_queue_head = NULL;
29508e1e
NH
32
33size_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
45size_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
54size_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
61static void finish_active_slot(struct active_request_slot *slot);
62
63#ifdef USE_CURL_MULTI
64static 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
93static 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
170static 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
216void 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
276void 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
314struct 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
378int 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
401struct fill_chain {
402 void *data;
403 int (*fill)(void *);
404 struct fill_chain *next;
405};
406
407static struct fill_chain *fill_cfg = NULL;
408
409void 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
421void 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
444void 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
459void 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 502static 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
508void 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
523static 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
543void 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}