gitweb: Replace wrongly added tabs with spaces
[git/jrn.git] / http.c
blob2e3d6493ef40e1b34fea8d166d760f0b1fcccafc
1 #include "http.h"
3 int data_received;
4 int active_requests;
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];
15 static int curl_ssl_verify = -1;
16 static const char *ssl_cert;
17 #if LIBCURL_VERSION_NUM >= 0x070902
18 static const char *ssl_key;
19 #endif
20 #if LIBCURL_VERSION_NUM >= 0x070908
21 static const char *ssl_capath;
22 #endif
23 static const char *ssl_cainfo;
24 static long curl_low_speed_limit = -1;
25 static long curl_low_speed_time = -1;
26 static int curl_ftp_no_epsv;
27 static const char *curl_http_proxy;
28 static char *user_name, *user_pass;
30 static struct curl_slist *pragma_header;
32 static struct active_request_slot *active_queue_head;
34 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
36 size_t size = eltsize * nmemb;
37 struct buffer *buffer = buffer_;
39 if (size > buffer->buf.len - buffer->posn)
40 size = buffer->buf.len - buffer->posn;
41 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
42 buffer->posn += size;
44 return size;
47 #ifndef NO_CURL_IOCTL
48 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
50 struct buffer *buffer = clientp;
52 switch (cmd) {
53 case CURLIOCMD_NOP:
54 return CURLIOE_OK;
56 case CURLIOCMD_RESTARTREAD:
57 buffer->posn = 0;
58 return CURLIOE_OK;
60 default:
61 return CURLIOE_UNKNOWNCMD;
64 #endif
66 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
68 size_t size = eltsize * nmemb;
69 struct strbuf *buffer = buffer_;
71 strbuf_add(buffer, ptr, size);
72 data_received++;
73 return size;
76 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
78 data_received++;
79 return eltsize * nmemb;
82 static void finish_active_slot(struct active_request_slot *slot);
84 #ifdef USE_CURL_MULTI
85 static void process_curl_messages(void)
87 int num_messages;
88 struct active_request_slot *slot;
89 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
91 while (curl_message != NULL) {
92 if (curl_message->msg == CURLMSG_DONE) {
93 int curl_result = curl_message->data.result;
94 slot = active_queue_head;
95 while (slot != NULL &&
96 slot->curl != curl_message->easy_handle)
97 slot = slot->next;
98 if (slot != NULL) {
99 curl_multi_remove_handle(curlm, slot->curl);
100 slot->curl_result = curl_result;
101 finish_active_slot(slot);
102 } else {
103 fprintf(stderr, "Received DONE message for unknown request!\n");
105 } else {
106 fprintf(stderr, "Unknown CURL message received: %d\n",
107 (int)curl_message->msg);
109 curl_message = curl_multi_info_read(curlm, &num_messages);
112 #endif
114 static int http_options(const char *var, const char *value, void *cb)
116 if (!strcmp("http.sslverify", var)) {
117 curl_ssl_verify = git_config_bool(var, value);
118 return 0;
120 if (!strcmp("http.sslcert", var))
121 return git_config_string(&ssl_cert, var, value);
122 #if LIBCURL_VERSION_NUM >= 0x070902
123 if (!strcmp("http.sslkey", var))
124 return git_config_string(&ssl_key, var, value);
125 #endif
126 #if LIBCURL_VERSION_NUM >= 0x070908
127 if (!strcmp("http.sslcapath", var))
128 return git_config_string(&ssl_capath, var, value);
129 #endif
130 if (!strcmp("http.sslcainfo", var))
131 return git_config_string(&ssl_cainfo, var, value);
132 #ifdef USE_CURL_MULTI
133 if (!strcmp("http.maxrequests", var)) {
134 max_requests = git_config_int(var, value);
135 return 0;
137 #endif
138 if (!strcmp("http.lowspeedlimit", var)) {
139 curl_low_speed_limit = (long)git_config_int(var, value);
140 return 0;
142 if (!strcmp("http.lowspeedtime", var)) {
143 curl_low_speed_time = (long)git_config_int(var, value);
144 return 0;
147 if (!strcmp("http.noepsv", var)) {
148 curl_ftp_no_epsv = git_config_bool(var, value);
149 return 0;
151 if (!strcmp("http.proxy", var))
152 return git_config_string(&curl_http_proxy, var, value);
154 /* Fall back on the default ones */
155 return git_default_config(var, value, cb);
158 static void init_curl_http_auth(CURL *result)
160 if (user_name) {
161 struct strbuf up = STRBUF_INIT;
162 if (!user_pass)
163 user_pass = xstrdup(getpass("Password: "));
164 strbuf_addf(&up, "%s:%s", user_name, user_pass);
165 curl_easy_setopt(result, CURLOPT_USERPWD,
166 strbuf_detach(&up, NULL));
170 static CURL *get_curl_handle(void)
172 CURL *result = curl_easy_init();
174 if (!curl_ssl_verify) {
175 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
176 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
177 } else {
178 /* Verify authenticity of the peer's certificate */
179 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
180 /* The name in the cert must match whom we tried to connect */
181 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
184 #if LIBCURL_VERSION_NUM >= 0x070907
185 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
186 #endif
188 init_curl_http_auth(result);
190 if (ssl_cert != NULL)
191 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
192 #if LIBCURL_VERSION_NUM >= 0x070902
193 if (ssl_key != NULL)
194 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
195 #endif
196 #if LIBCURL_VERSION_NUM >= 0x070908
197 if (ssl_capath != NULL)
198 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
199 #endif
200 if (ssl_cainfo != NULL)
201 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
202 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
204 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
205 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
206 curl_low_speed_limit);
207 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
208 curl_low_speed_time);
211 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
213 if (getenv("GIT_CURL_VERBOSE"))
214 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
216 curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
218 if (curl_ftp_no_epsv)
219 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
221 if (curl_http_proxy)
222 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
224 return result;
227 static void http_auth_init(const char *url)
229 char *at, *colon, *cp, *slash;
230 int len;
232 cp = strstr(url, "://");
233 if (!cp)
234 return;
237 * Ok, the URL looks like "proto://something". Which one?
238 * "proto://<user>:<pass>@<host>/...",
239 * "proto://<user>@<host>/...", or just
240 * "proto://<host>/..."?
242 cp += 3;
243 at = strchr(cp, '@');
244 colon = strchr(cp, ':');
245 slash = strchrnul(cp, '/');
246 if (!at || slash <= at)
247 return; /* No credentials */
248 if (!colon || at <= colon) {
249 /* Only username */
250 len = at - cp;
251 user_name = xmalloc(len + 1);
252 memcpy(user_name, cp, len);
253 user_name[len] = '\0';
254 user_pass = NULL;
255 } else {
256 len = colon - cp;
257 user_name = xmalloc(len + 1);
258 memcpy(user_name, cp, len);
259 user_name[len] = '\0';
260 len = at - (colon + 1);
261 user_pass = xmalloc(len + 1);
262 memcpy(user_pass, colon + 1, len);
263 user_pass[len] = '\0';
267 static void set_from_env(const char **var, const char *envname)
269 const char *val = getenv(envname);
270 if (val)
271 *var = val;
274 void http_init(struct remote *remote)
276 char *low_speed_limit;
277 char *low_speed_time;
279 git_config(http_options, NULL);
281 curl_global_init(CURL_GLOBAL_ALL);
283 if (remote && remote->http_proxy)
284 curl_http_proxy = xstrdup(remote->http_proxy);
286 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
288 #ifdef USE_CURL_MULTI
290 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
291 if (http_max_requests != NULL)
292 max_requests = atoi(http_max_requests);
295 curlm = curl_multi_init();
296 if (curlm == NULL) {
297 fprintf(stderr, "Error creating curl multi handle.\n");
298 exit(1);
300 #endif
302 if (getenv("GIT_SSL_NO_VERIFY"))
303 curl_ssl_verify = 0;
305 set_from_env(&ssl_cert, "GIT_SSL_CERT");
306 #if LIBCURL_VERSION_NUM >= 0x070902
307 set_from_env(&ssl_key, "GIT_SSL_KEY");
308 #endif
309 #if LIBCURL_VERSION_NUM >= 0x070908
310 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
311 #endif
312 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
314 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
315 if (low_speed_limit != NULL)
316 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
317 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
318 if (low_speed_time != NULL)
319 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
321 if (curl_ssl_verify == -1)
322 curl_ssl_verify = 1;
324 #ifdef USE_CURL_MULTI
325 if (max_requests < 1)
326 max_requests = DEFAULT_MAX_REQUESTS;
327 #endif
329 if (getenv("GIT_CURL_FTP_NO_EPSV"))
330 curl_ftp_no_epsv = 1;
332 if (remote && remote->url && remote->url[0])
333 http_auth_init(remote->url[0]);
335 #ifndef NO_CURL_EASY_DUPHANDLE
336 curl_default = get_curl_handle();
337 #endif
340 void http_cleanup(void)
342 struct active_request_slot *slot = active_queue_head;
344 while (slot != NULL) {
345 struct active_request_slot *next = slot->next;
346 if (slot->curl != NULL) {
347 #ifdef USE_CURL_MULTI
348 curl_multi_remove_handle(curlm, slot->curl);
349 #endif
350 curl_easy_cleanup(slot->curl);
352 free(slot);
353 slot = next;
355 active_queue_head = NULL;
357 #ifndef NO_CURL_EASY_DUPHANDLE
358 curl_easy_cleanup(curl_default);
359 #endif
361 #ifdef USE_CURL_MULTI
362 curl_multi_cleanup(curlm);
363 #endif
364 curl_global_cleanup();
366 curl_slist_free_all(pragma_header);
367 pragma_header = NULL;
369 if (curl_http_proxy) {
370 free((void *)curl_http_proxy);
371 curl_http_proxy = NULL;
375 struct active_request_slot *get_active_slot(void)
377 struct active_request_slot *slot = active_queue_head;
378 struct active_request_slot *newslot;
380 #ifdef USE_CURL_MULTI
381 int num_transfers;
383 /* Wait for a slot to open up if the queue is full */
384 while (active_requests >= max_requests) {
385 curl_multi_perform(curlm, &num_transfers);
386 if (num_transfers < active_requests)
387 process_curl_messages();
389 #endif
391 while (slot != NULL && slot->in_use)
392 slot = slot->next;
394 if (slot == NULL) {
395 newslot = xmalloc(sizeof(*newslot));
396 newslot->curl = NULL;
397 newslot->in_use = 0;
398 newslot->next = NULL;
400 slot = active_queue_head;
401 if (slot == NULL) {
402 active_queue_head = newslot;
403 } else {
404 while (slot->next != NULL)
405 slot = slot->next;
406 slot->next = newslot;
408 slot = newslot;
411 if (slot->curl == NULL) {
412 #ifdef NO_CURL_EASY_DUPHANDLE
413 slot->curl = get_curl_handle();
414 #else
415 slot->curl = curl_easy_duphandle(curl_default);
416 #endif
419 active_requests++;
420 slot->in_use = 1;
421 slot->local = NULL;
422 slot->results = NULL;
423 slot->finished = NULL;
424 slot->callback_data = NULL;
425 slot->callback_func = NULL;
426 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
427 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
428 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
429 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
430 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
431 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
432 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
434 return slot;
437 int start_active_slot(struct active_request_slot *slot)
439 #ifdef USE_CURL_MULTI
440 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
441 int num_transfers;
443 if (curlm_result != CURLM_OK &&
444 curlm_result != CURLM_CALL_MULTI_PERFORM) {
445 active_requests--;
446 slot->in_use = 0;
447 return 0;
451 * We know there must be something to do, since we just added
452 * something.
454 curl_multi_perform(curlm, &num_transfers);
455 #endif
456 return 1;
459 #ifdef USE_CURL_MULTI
460 struct fill_chain {
461 void *data;
462 int (*fill)(void *);
463 struct fill_chain *next;
466 static struct fill_chain *fill_cfg;
468 void add_fill_function(void *data, int (*fill)(void *))
470 struct fill_chain *new = xmalloc(sizeof(*new));
471 struct fill_chain **linkp = &fill_cfg;
472 new->data = data;
473 new->fill = fill;
474 new->next = NULL;
475 while (*linkp)
476 linkp = &(*linkp)->next;
477 *linkp = new;
480 void fill_active_slots(void)
482 struct active_request_slot *slot = active_queue_head;
484 while (active_requests < max_requests) {
485 struct fill_chain *fill;
486 for (fill = fill_cfg; fill; fill = fill->next)
487 if (fill->fill(fill->data))
488 break;
490 if (!fill)
491 break;
494 while (slot != NULL) {
495 if (!slot->in_use && slot->curl != NULL) {
496 curl_easy_cleanup(slot->curl);
497 slot->curl = NULL;
499 slot = slot->next;
503 void step_active_slots(void)
505 int num_transfers;
506 CURLMcode curlm_result;
508 do {
509 curlm_result = curl_multi_perform(curlm, &num_transfers);
510 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
511 if (num_transfers < active_requests) {
512 process_curl_messages();
513 fill_active_slots();
516 #endif
518 void run_active_slot(struct active_request_slot *slot)
520 #ifdef USE_CURL_MULTI
521 long last_pos = 0;
522 long current_pos;
523 fd_set readfds;
524 fd_set writefds;
525 fd_set excfds;
526 int max_fd;
527 struct timeval select_timeout;
528 int finished = 0;
530 slot->finished = &finished;
531 while (!finished) {
532 data_received = 0;
533 step_active_slots();
535 if (!data_received && slot->local != NULL) {
536 current_pos = ftell(slot->local);
537 if (current_pos > last_pos)
538 data_received++;
539 last_pos = current_pos;
542 if (slot->in_use && !data_received) {
543 max_fd = 0;
544 FD_ZERO(&readfds);
545 FD_ZERO(&writefds);
546 FD_ZERO(&excfds);
547 select_timeout.tv_sec = 0;
548 select_timeout.tv_usec = 50000;
549 select(max_fd, &readfds, &writefds,
550 &excfds, &select_timeout);
553 #else
554 while (slot->in_use) {
555 slot->curl_result = curl_easy_perform(slot->curl);
556 finish_active_slot(slot);
558 #endif
561 static void closedown_active_slot(struct active_request_slot *slot)
563 active_requests--;
564 slot->in_use = 0;
567 void release_active_slot(struct active_request_slot *slot)
569 closedown_active_slot(slot);
570 if (slot->curl) {
571 #ifdef USE_CURL_MULTI
572 curl_multi_remove_handle(curlm, slot->curl);
573 #endif
574 curl_easy_cleanup(slot->curl);
575 slot->curl = NULL;
577 #ifdef USE_CURL_MULTI
578 fill_active_slots();
579 #endif
582 static void finish_active_slot(struct active_request_slot *slot)
584 closedown_active_slot(slot);
585 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
587 if (slot->finished != NULL)
588 (*slot->finished) = 1;
590 /* Store slot results so they can be read after the slot is reused */
591 if (slot->results != NULL) {
592 slot->results->curl_result = slot->curl_result;
593 slot->results->http_code = slot->http_code;
596 /* Run callback if appropriate */
597 if (slot->callback_func != NULL)
598 slot->callback_func(slot->callback_data);
601 void finish_all_active_slots(void)
603 struct active_request_slot *slot = active_queue_head;
605 while (slot != NULL)
606 if (slot->in_use) {
607 run_active_slot(slot);
608 slot = active_queue_head;
609 } else {
610 slot = slot->next;
614 static inline int needs_quote(int ch)
616 if (((ch >= 'A') && (ch <= 'Z'))
617 || ((ch >= 'a') && (ch <= 'z'))
618 || ((ch >= '0') && (ch <= '9'))
619 || (ch == '/')
620 || (ch == '-')
621 || (ch == '.'))
622 return 0;
623 return 1;
626 static inline int hex(int v)
628 if (v < 10)
629 return '0' + v;
630 else
631 return 'A' + v - 10;
634 static char *quote_ref_url(const char *base, const char *ref)
636 struct strbuf buf = STRBUF_INIT;
637 const char *cp;
638 int ch;
640 strbuf_addstr(&buf, base);
641 if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
642 strbuf_addstr(&buf, "/");
644 for (cp = ref; (ch = *cp) != 0; cp++)
645 if (needs_quote(ch))
646 strbuf_addf(&buf, "%%%02x", ch);
647 else
648 strbuf_addch(&buf, *cp);
650 return strbuf_detach(&buf, NULL);
653 int http_fetch_ref(const char *base, struct ref *ref)
655 char *url;
656 struct strbuf buffer = STRBUF_INIT;
657 struct active_request_slot *slot;
658 struct slot_results results;
659 int ret;
661 url = quote_ref_url(base, ref->name);
662 slot = get_active_slot();
663 slot->results = &results;
664 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
665 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
666 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
667 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
668 if (start_active_slot(slot)) {
669 run_active_slot(slot);
670 if (results.curl_result == CURLE_OK) {
671 strbuf_rtrim(&buffer);
672 if (buffer.len == 40)
673 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
674 else if (!prefixcmp(buffer.buf, "ref: ")) {
675 ref->symref = xstrdup(buffer.buf + 5);
676 ret = 0;
677 } else
678 ret = 1;
679 } else {
680 ret = error("Couldn't get %s for %s\n%s",
681 url, ref->name, curl_errorstr);
683 } else {
684 ret = error("Unable to start request");
687 strbuf_release(&buffer);
688 free(url);
689 return ret;