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Merge branch 'maint' of git://repo.or.cz/git-gui into maint
[git/haiku.git] / http.c
blobc7deccb6de6a8a57a2fb57734f05d6ffdc6ae9dc
1 #include "http.h"
2
3 int data_received;
4 int active_requests = 0;
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 char *ssl_cert = NULL;
17 #if LIBCURL_VERSION_NUM >= 0x070902
18 static char *ssl_key = NULL;
19 #endif
20 #if LIBCURL_VERSION_NUM >= 0x070908
21 static char *ssl_capath = NULL;
22 #endif
23 static char *ssl_cainfo = NULL;
24 static long curl_low_speed_limit = -1;
25 static long curl_low_speed_time = -1;
26 static int curl_ftp_no_epsv = 0;
27 static char *curl_http_proxy = NULL;
28
29 static struct curl_slist *pragma_header;
30
31 static struct active_request_slot *active_queue_head = NULL;
32
33 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb,
34 struct buffer *buffer)
35 {
36 size_t size = eltsize * nmemb;
37 if (size > buffer->buf.len - buffer->posn)
38 size = buffer->buf.len - buffer->posn;
39 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
40 buffer->posn += size;
41
42 return size;
43 }
44
45 size_t fwrite_buffer(const void *ptr, size_t eltsize,
46 size_t nmemb, struct strbuf *buffer)
47 {
48 size_t size = eltsize * nmemb;
49 strbuf_add(buffer, ptr, size);
50 data_received++;
51 return size;
52 }
53
54 size_t fwrite_null(const void *ptr, size_t eltsize,
55 size_t nmemb, struct strbuf *buffer)
56 {
57 data_received++;
58 return eltsize * nmemb;
59 }
60
61 static void finish_active_slot(struct active_request_slot *slot);
62
63 #ifdef USE_CURL_MULTI
64 static 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
93 static 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 if (!value)
105 return config_error_nonbool(var);
106 ssl_cert = xstrdup(value);
107 }
108 return 0;
109 }
110 #if LIBCURL_VERSION_NUM >= 0x070902
111 if (!strcmp("http.sslkey", var)) {
112 if (ssl_key == NULL) {
113 if (!value)
114 return config_error_nonbool(var);
115 ssl_key = xstrdup(value);
116 }
117 return 0;
118 }
119 #endif
120 #if LIBCURL_VERSION_NUM >= 0x070908
121 if (!strcmp("http.sslcapath", var)) {
122 if (ssl_capath == NULL) {
123 if (!value)
124 return config_error_nonbool(var);
125 ssl_capath = xstrdup(value);
126 }
127 return 0;
128 }
129 #endif
130 if (!strcmp("http.sslcainfo", var)) {
131 if (ssl_cainfo == NULL) {
132 if (!value)
133 return config_error_nonbool(var);
134 ssl_cainfo = xstrdup(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 if (!strcmp("http.noepsv", var)) {
159 curl_ftp_no_epsv = git_config_bool(var, value);
160 return 0;
161 }
162 if (!strcmp("http.proxy", var)) {
163 if (curl_http_proxy == NULL) {
164 if (!value)
165 return config_error_nonbool(var);
166 curl_http_proxy = xstrdup(value);
167 }
168 return 0;
169 }
170
171 /* Fall back on the default ones */
172 return git_default_config(var, value);
173 }
174
175 static CURL* get_curl_handle(void)
176 {
177 CURL* result = curl_easy_init();
178
179 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
180 #if LIBCURL_VERSION_NUM >= 0x070907
181 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
182 #endif
183
184 if (ssl_cert != NULL)
185 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
186 #if LIBCURL_VERSION_NUM >= 0x070902
187 if (ssl_key != NULL)
188 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
189 #endif
190 #if LIBCURL_VERSION_NUM >= 0x070908
191 if (ssl_capath != NULL)
192 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
193 #endif
194 if (ssl_cainfo != NULL)
195 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
196 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
197
198 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
199 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
200 curl_low_speed_limit);
201 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
202 curl_low_speed_time);
203 }
204
205 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
206
207 if (getenv("GIT_CURL_VERBOSE"))
208 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
209
210 curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
211
212 if (curl_ftp_no_epsv)
213 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
214
215 if (curl_http_proxy)
216 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
217
218 return result;
219 }
220
221 void http_init(void)
222 {
223 char *low_speed_limit;
224 char *low_speed_time;
225
226 curl_global_init(CURL_GLOBAL_ALL);
227
228 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
229
230 #ifdef USE_CURL_MULTI
231 {
232 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
233 if (http_max_requests != NULL)
234 max_requests = atoi(http_max_requests);
235 }
236
237 curlm = curl_multi_init();
238 if (curlm == NULL) {
239 fprintf(stderr, "Error creating curl multi handle.\n");
240 exit(1);
241 }
242 #endif
243
244 if (getenv("GIT_SSL_NO_VERIFY"))
245 curl_ssl_verify = 0;
246
247 ssl_cert = getenv("GIT_SSL_CERT");
248 #if LIBCURL_VERSION_NUM >= 0x070902
249 ssl_key = getenv("GIT_SSL_KEY");
250 #endif
251 #if LIBCURL_VERSION_NUM >= 0x070908
252 ssl_capath = getenv("GIT_SSL_CAPATH");
253 #endif
254 ssl_cainfo = getenv("GIT_SSL_CAINFO");
255
256 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
257 if (low_speed_limit != NULL)
258 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
259 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
260 if (low_speed_time != NULL)
261 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
262
263 git_config(http_options);
264
265 if (curl_ssl_verify == -1)
266 curl_ssl_verify = 1;
267
268 #ifdef USE_CURL_MULTI
269 if (max_requests < 1)
270 max_requests = DEFAULT_MAX_REQUESTS;
271 #endif
272
273 if (getenv("GIT_CURL_FTP_NO_EPSV"))
274 curl_ftp_no_epsv = 1;
275
276 #ifndef NO_CURL_EASY_DUPHANDLE
277 curl_default = get_curl_handle();
278 #endif
279 }
280
281 void http_cleanup(void)
282 {
283 struct active_request_slot *slot = active_queue_head;
284
285 while (slot != NULL) {
286 struct active_request_slot *next = slot->next;
287 if (slot->curl != NULL) {
288 #ifdef USE_CURL_MULTI
289 curl_multi_remove_handle(curlm, slot->curl);
290 #endif
291 curl_easy_cleanup(slot->curl);
292 }
293 free(slot);
294 slot = next;
295 }
296 active_queue_head = NULL;
297
298 #ifndef NO_CURL_EASY_DUPHANDLE
299 curl_easy_cleanup(curl_default);
300 #endif
301
302 #ifdef USE_CURL_MULTI
303 curl_multi_cleanup(curlm);
304 #endif
305 curl_global_cleanup();
306
307 curl_slist_free_all(pragma_header);
308 pragma_header = NULL;
309 }
310
311 struct active_request_slot *get_active_slot(void)
312 {
313 struct active_request_slot *slot = active_queue_head;
314 struct active_request_slot *newslot;
315
316 #ifdef USE_CURL_MULTI
317 int num_transfers;
318
319 /* Wait for a slot to open up if the queue is full */
320 while (active_requests >= max_requests) {
321 curl_multi_perform(curlm, &num_transfers);
322 if (num_transfers < active_requests) {
323 process_curl_messages();
324 }
325 }
326 #endif
327
328 while (slot != NULL && slot->in_use) {
329 slot = slot->next;
330 }
331 if (slot == NULL) {
332 newslot = xmalloc(sizeof(*newslot));
333 newslot->curl = NULL;
334 newslot->in_use = 0;
335 newslot->next = NULL;
336
337 slot = active_queue_head;
338 if (slot == NULL) {
339 active_queue_head = newslot;
340 } else {
341 while (slot->next != NULL) {
342 slot = slot->next;
343 }
344 slot->next = newslot;
345 }
346 slot = newslot;
347 }
348
349 if (slot->curl == NULL) {
350 #ifdef NO_CURL_EASY_DUPHANDLE
351 slot->curl = get_curl_handle();
352 #else
353 slot->curl = curl_easy_duphandle(curl_default);
354 #endif
355 }
356
357 active_requests++;
358 slot->in_use = 1;
359 slot->local = NULL;
360 slot->results = NULL;
361 slot->finished = NULL;
362 slot->callback_data = NULL;
363 slot->callback_func = NULL;
364 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
365 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
366 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
367 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
368 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
369 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
370 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
371
372 return slot;
373 }
374
375 int start_active_slot(struct active_request_slot *slot)
376 {
377 #ifdef USE_CURL_MULTI
378 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
379 int num_transfers;
380
381 if (curlm_result != CURLM_OK &&
382 curlm_result != CURLM_CALL_MULTI_PERFORM) {
383 active_requests--;
384 slot->in_use = 0;
385 return 0;
386 }
387
388 /*
389 * We know there must be something to do, since we just added
390 * something.
391 */
392 curl_multi_perform(curlm, &num_transfers);
393 #endif
394 return 1;
395 }
396
397 #ifdef USE_CURL_MULTI
398 struct fill_chain {
399 void *data;
400 int (*fill)(void *);
401 struct fill_chain *next;
402 };
403
404 static struct fill_chain *fill_cfg = NULL;
405
406 void add_fill_function(void *data, int (*fill)(void *))
407 {
408 struct fill_chain *new = malloc(sizeof(*new));
409 struct fill_chain **linkp = &fill_cfg;
410 new->data = data;
411 new->fill = fill;
412 new->next = NULL;
413 while (*linkp)
414 linkp = &(*linkp)->next;
415 *linkp = new;
416 }
417
418 void fill_active_slots(void)
419 {
420 struct active_request_slot *slot = active_queue_head;
421
422 while (active_requests < max_requests) {
423 struct fill_chain *fill;
424 for (fill = fill_cfg; fill; fill = fill->next)
425 if (fill->fill(fill->data))
426 break;
427
428 if (!fill)
429 break;
430 }
431
432 while (slot != NULL) {
433 if (!slot->in_use && slot->curl != NULL) {
434 curl_easy_cleanup(slot->curl);
435 slot->curl = NULL;
436 }
437 slot = slot->next;
438 }
439 }
440
441 void step_active_slots(void)
442 {
443 int num_transfers;
444 CURLMcode curlm_result;
445
446 do {
447 curlm_result = curl_multi_perform(curlm, &num_transfers);
448 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
449 if (num_transfers < active_requests) {
450 process_curl_messages();
451 fill_active_slots();
452 }
453 }
454 #endif
455
456 void run_active_slot(struct active_request_slot *slot)
457 {
458 #ifdef USE_CURL_MULTI
459 long last_pos = 0;
460 long current_pos;
461 fd_set readfds;
462 fd_set writefds;
463 fd_set excfds;
464 int max_fd;
465 struct timeval select_timeout;
466 int finished = 0;
467
468 slot->finished = &finished;
469 while (!finished) {
470 data_received = 0;
471 step_active_slots();
472
473 if (!data_received && slot->local != NULL) {
474 current_pos = ftell(slot->local);
475 if (current_pos > last_pos)
476 data_received++;
477 last_pos = current_pos;
478 }
479
480 if (slot->in_use && !data_received) {
481 max_fd = 0;
482 FD_ZERO(&readfds);
483 FD_ZERO(&writefds);
484 FD_ZERO(&excfds);
485 select_timeout.tv_sec = 0;
486 select_timeout.tv_usec = 50000;
487 select(max_fd, &readfds, &writefds,
488 &excfds, &select_timeout);
489 }
490 }
491 #else
492 while (slot->in_use) {
493 slot->curl_result = curl_easy_perform(slot->curl);
494 finish_active_slot(slot);
495 }
496 #endif
497 }
498
499 static void closedown_active_slot(struct active_request_slot *slot)
500 {
501 active_requests--;
502 slot->in_use = 0;
503 }
504
505 void release_active_slot(struct active_request_slot *slot)
506 {
507 closedown_active_slot(slot);
508 if (slot->curl) {
509 #ifdef USE_CURL_MULTI
510 curl_multi_remove_handle(curlm, slot->curl);
511 #endif
512 curl_easy_cleanup(slot->curl);
513 slot->curl = NULL;
514 }
515 #ifdef USE_CURL_MULTI
516 fill_active_slots();
517 #endif
518 }
519
520 static void finish_active_slot(struct active_request_slot *slot)
521 {
522 closedown_active_slot(slot);
523 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
524
525 if (slot->finished != NULL)
526 (*slot->finished) = 1;
527
528 /* Store slot results so they can be read after the slot is reused */
529 if (slot->results != NULL) {
530 slot->results->curl_result = slot->curl_result;
531 slot->results->http_code = slot->http_code;
532 }
533
534 /* Run callback if appropriate */
535 if (slot->callback_func != NULL) {
536 slot->callback_func(slot->callback_data);
537 }
538 }
539
540 void finish_all_active_slots(void)
541 {
542 struct active_request_slot *slot = active_queue_head;
543
544 while (slot != NULL)
545 if (slot->in_use) {
546 run_active_slot(slot);
547 slot = active_queue_head;
548 } else {
549 slot = slot->next;
550 }
551 }
552
553 static inline int needs_quote(int ch)
554 {
555 if (((ch >= 'A') && (ch <= 'Z'))
556 || ((ch >= 'a') && (ch <= 'z'))
557 || ((ch >= '0') && (ch <= '9'))
558 || (ch == '/')
559 || (ch == '-')
560 || (ch == '.'))
561 return 0;
562 return 1;
563 }
564
565 static inline int hex(int v)
566 {
567 if (v < 10) return '0' + v;
568 else return 'A' + v - 10;
569 }
570
571 static char *quote_ref_url(const char *base, const char *ref)
572 {
573 const char *cp;
574 char *dp, *qref;
575 int len, baselen, ch;
576
577 baselen = strlen(base);
578 len = baselen + 7; /* "/refs/" + NUL */
579 for (cp = ref; (ch = *cp) != 0; cp++, len++)
580 if (needs_quote(ch))
581 len += 2; /* extra two hex plus replacement % */
582 qref = xmalloc(len);
583 memcpy(qref, base, baselen);
584 memcpy(qref + baselen, "/refs/", 6);
585 for (cp = ref, dp = qref + baselen + 6; (ch = *cp) != 0; cp++) {
586 if (needs_quote(ch)) {
587 *dp++ = '%';
588 *dp++ = hex((ch >> 4) & 0xF);
589 *dp++ = hex(ch & 0xF);
590 }
591 else
592 *dp++ = ch;
593 }
594 *dp = 0;
595
596 return qref;
597 }
598
599 int http_fetch_ref(const char *base, const char *ref, unsigned char *sha1)
600 {
601 char *url;
602 struct strbuf buffer = STRBUF_INIT;
603 struct active_request_slot *slot;
604 struct slot_results results;
605 int ret;
606
607 url = quote_ref_url(base, ref);
608 slot = get_active_slot();
609 slot->results = &results;
610 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
611 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
612 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
613 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
614 if (start_active_slot(slot)) {
615 run_active_slot(slot);
616 if (results.curl_result == CURLE_OK) {
617 strbuf_rtrim(&buffer);
618 if (buffer.len == 40)
619 ret = get_sha1_hex(buffer.buf, sha1);
620 else
621 ret = 1;
622 } else {
623 ret = error("Couldn't get %s for %s\n%s",
624 url, ref, curl_errorstr);
625 }
626 } else {
627 ret = error("Unable to start request");
628 }
629
630 strbuf_release(&buffer);
631 free(url);
632 return ret;
633 }
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