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http: use hostname in credential description
[git/git-svn.git] / http.c
blob7ae0c2a3208966bfda15e73299388595b510a776
1 #include "http.h"
2 #include "pack.h"
3 #include "sideband.h"
4 #include "run-command.h"
5 #include "url.h"
6
7 int data_received;
8 int active_requests;
9 int http_is_verbose;
10 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
11
12 #if LIBCURL_VERSION_NUM >= 0x070a06
13 #define LIBCURL_CAN_HANDLE_AUTH_ANY
14 #endif
15
16 static int min_curl_sessions = 1;
17 static int curl_session_count;
18 #ifdef USE_CURL_MULTI
19 static int max_requests = -1;
20 static CURLM *curlm;
21 #endif
22 #ifndef NO_CURL_EASY_DUPHANDLE
23 static CURL *curl_default;
24 #endif
25
26 #define PREV_BUF_SIZE 4096
27 #define RANGE_HEADER_SIZE 30
28
29 char curl_errorstr[CURL_ERROR_SIZE];
30
31 static int curl_ssl_verify = -1;
32 static const char *ssl_cert;
33 #if LIBCURL_VERSION_NUM >= 0x070903
34 static const char *ssl_key;
35 #endif
36 #if LIBCURL_VERSION_NUM >= 0x070908
37 static const char *ssl_capath;
38 #endif
39 static const char *ssl_cainfo;
40 static long curl_low_speed_limit = -1;
41 static long curl_low_speed_time = -1;
42 static int curl_ftp_no_epsv;
43 static const char *curl_http_proxy;
44 static const char *curl_cookie_file;
45 static char *user_name, *user_pass, *description;
46 static const char *user_agent;
47
48 #if LIBCURL_VERSION_NUM >= 0x071700
49 /* Use CURLOPT_KEYPASSWD as is */
50 #elif LIBCURL_VERSION_NUM >= 0x070903
51 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
52 #else
53 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
54 #endif
55
56 static char *ssl_cert_password;
57 static int ssl_cert_password_required;
58
59 static struct curl_slist *pragma_header;
60 static struct curl_slist *no_pragma_header;
61
62 static struct active_request_slot *active_queue_head;
63
64 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
65 {
66 size_t size = eltsize * nmemb;
67 struct buffer *buffer = buffer_;
68
69 if (size > buffer->buf.len - buffer->posn)
70 size = buffer->buf.len - buffer->posn;
71 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
72 buffer->posn += size;
73
74 return size;
75 }
76
77 #ifndef NO_CURL_IOCTL
78 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
79 {
80 struct buffer *buffer = clientp;
81
82 switch (cmd) {
83 case CURLIOCMD_NOP:
84 return CURLIOE_OK;
85
86 case CURLIOCMD_RESTARTREAD:
87 buffer->posn = 0;
88 return CURLIOE_OK;
89
90 default:
91 return CURLIOE_UNKNOWNCMD;
92 }
93 }
94 #endif
95
96 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
97 {
98 size_t size = eltsize * nmemb;
99 struct strbuf *buffer = buffer_;
100
101 strbuf_add(buffer, ptr, size);
102 data_received++;
103 return size;
104 }
105
106 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
107 {
108 data_received++;
109 return eltsize * nmemb;
110 }
111
112 #ifdef USE_CURL_MULTI
113 static void process_curl_messages(void)
114 {
115 int num_messages;
116 struct active_request_slot *slot;
117 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
118
119 while (curl_message != NULL) {
120 if (curl_message->msg == CURLMSG_DONE) {
121 int curl_result = curl_message->data.result;
122 slot = active_queue_head;
123 while (slot != NULL &&
124 slot->curl != curl_message->easy_handle)
125 slot = slot->next;
126 if (slot != NULL) {
127 curl_multi_remove_handle(curlm, slot->curl);
128 slot->curl_result = curl_result;
129 finish_active_slot(slot);
130 } else {
131 fprintf(stderr, "Received DONE message for unknown request!\n");
132 }
133 } else {
134 fprintf(stderr, "Unknown CURL message received: %d\n",
135 (int)curl_message->msg);
136 }
137 curl_message = curl_multi_info_read(curlm, &num_messages);
138 }
139 }
140 #endif
141
142 static char *git_getpass_with_description(const char *what, const char *desc)
143 {
144 struct strbuf prompt = STRBUF_INIT;
145 char *r;
146
147 if (desc)
148 strbuf_addf(&prompt, "%s for '%s': ", what, desc);
149 else
150 strbuf_addf(&prompt, "%s: ", what);
151 /*
152 * NEEDSWORK: for usernames, we should do something less magical that
153 * actually echoes the characters. However, we need to read from
154 * /dev/tty and not stdio, which is not portable (but getpass will do
155 * it for us). http.c uses the same workaround.
156 */
157 r = git_getpass(prompt.buf);
158
159 strbuf_release(&prompt);
160 return xstrdup(r);
161 }
162
163 static int http_options(const char *var, const char *value, void *cb)
164 {
165 if (!strcmp("http.sslverify", var)) {
166 curl_ssl_verify = git_config_bool(var, value);
167 return 0;
168 }
169 if (!strcmp("http.sslcert", var))
170 return git_config_string(&ssl_cert, var, value);
171 #if LIBCURL_VERSION_NUM >= 0x070903
172 if (!strcmp("http.sslkey", var))
173 return git_config_string(&ssl_key, var, value);
174 #endif
175 #if LIBCURL_VERSION_NUM >= 0x070908
176 if (!strcmp("http.sslcapath", var))
177 return git_config_string(&ssl_capath, var, value);
178 #endif
179 if (!strcmp("http.sslcainfo", var))
180 return git_config_string(&ssl_cainfo, var, value);
181 if (!strcmp("http.sslcertpasswordprotected", var)) {
182 if (git_config_bool(var, value))
183 ssl_cert_password_required = 1;
184 return 0;
185 }
186 if (!strcmp("http.minsessions", var)) {
187 min_curl_sessions = git_config_int(var, value);
188 #ifndef USE_CURL_MULTI
189 if (min_curl_sessions > 1)
190 min_curl_sessions = 1;
191 #endif
192 return 0;
193 }
194 #ifdef USE_CURL_MULTI
195 if (!strcmp("http.maxrequests", var)) {
196 max_requests = git_config_int(var, value);
197 return 0;
198 }
199 #endif
200 if (!strcmp("http.lowspeedlimit", var)) {
201 curl_low_speed_limit = (long)git_config_int(var, value);
202 return 0;
203 }
204 if (!strcmp("http.lowspeedtime", var)) {
205 curl_low_speed_time = (long)git_config_int(var, value);
206 return 0;
207 }
208
209 if (!strcmp("http.noepsv", var)) {
210 curl_ftp_no_epsv = git_config_bool(var, value);
211 return 0;
212 }
213 if (!strcmp("http.proxy", var))
214 return git_config_string(&curl_http_proxy, var, value);
215
216 if (!strcmp("http.cookiefile", var))
217 return git_config_string(&curl_cookie_file, var, value);
218
219 if (!strcmp("http.postbuffer", var)) {
220 http_post_buffer = git_config_int(var, value);
221 if (http_post_buffer < LARGE_PACKET_MAX)
222 http_post_buffer = LARGE_PACKET_MAX;
223 return 0;
224 }
225
226 if (!strcmp("http.useragent", var))
227 return git_config_string(&user_agent, var, value);
228
229 /* Fall back on the default ones */
230 return git_default_config(var, value, cb);
231 }
232
233 static void init_curl_http_auth(CURL *result)
234 {
235 if (user_name) {
236 struct strbuf up = STRBUF_INIT;
237 if (!user_pass)
238 user_pass = xstrdup(git_getpass_with_description("Password", description));
239 strbuf_addf(&up, "%s:%s", user_name, user_pass);
240 curl_easy_setopt(result, CURLOPT_USERPWD,
241 strbuf_detach(&up, NULL));
242 }
243 }
244
245 static int has_cert_password(void)
246 {
247 if (ssl_cert_password != NULL)
248 return 1;
249 if (ssl_cert == NULL || ssl_cert_password_required != 1)
250 return 0;
251 /* Only prompt the user once. */
252 ssl_cert_password_required = -1;
253 ssl_cert_password = git_getpass_with_description("Certificate Password", description);
254 if (ssl_cert_password != NULL) {
255 ssl_cert_password = xstrdup(ssl_cert_password);
256 return 1;
257 } else
258 return 0;
259 }
260
261 static CURL *get_curl_handle(void)
262 {
263 CURL *result = curl_easy_init();
264
265 if (!curl_ssl_verify) {
266 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
267 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
268 } else {
269 /* Verify authenticity of the peer's certificate */
270 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
271 /* The name in the cert must match whom we tried to connect */
272 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
273 }
274
275 #if LIBCURL_VERSION_NUM >= 0x070907
276 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
277 #endif
278 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
279 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
280 #endif
281
282 init_curl_http_auth(result);
283
284 if (ssl_cert != NULL)
285 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
286 if (has_cert_password())
287 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
288 #if LIBCURL_VERSION_NUM >= 0x070903
289 if (ssl_key != NULL)
290 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
291 #endif
292 #if LIBCURL_VERSION_NUM >= 0x070908
293 if (ssl_capath != NULL)
294 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
295 #endif
296 if (ssl_cainfo != NULL)
297 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
298 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
299
300 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
301 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
302 curl_low_speed_limit);
303 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
304 curl_low_speed_time);
305 }
306
307 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
308 #if LIBCURL_VERSION_NUM >= 0x071301
309 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
310 #elif LIBCURL_VERSION_NUM >= 0x071101
311 curl_easy_setopt(result, CURLOPT_POST301, 1);
312 #endif
313
314 if (getenv("GIT_CURL_VERBOSE"))
315 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
316
317 curl_easy_setopt(result, CURLOPT_USERAGENT,
318 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
319
320 if (curl_ftp_no_epsv)
321 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
322
323 if (curl_http_proxy)
324 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
325
326 return result;
327 }
328
329 static void http_auth_init(const char *url)
330 {
331 const char *at, *colon, *cp, *slash, *host;
332
333 cp = strstr(url, "://");
334 if (!cp)
335 return;
336
337 /*
338 * Ok, the URL looks like "proto://something". Which one?
339 * "proto://<user>:<pass>@<host>/...",
340 * "proto://<user>@<host>/...", or just
341 * "proto://<host>/..."?
342 */
343 cp += 3;
344 at = strchr(cp, '@');
345 colon = strchr(cp, ':');
346 slash = strchrnul(cp, '/');
347 if (!at || slash <= at) {
348 /* No credentials, but we may have to ask for some later */
349 host = cp;
350 }
351 else if (!colon || at <= colon) {
352 /* Only username */
353 user_name = url_decode_mem(cp, at - cp);
354 user_pass = NULL;
355 host = at + 1;
356 } else {
357 user_name = url_decode_mem(cp, colon - cp);
358 user_pass = url_decode_mem(colon + 1, at - (colon + 1));
359 host = at + 1;
360 }
361
362 description = url_decode_mem(host, slash - host);
363 }
364
365 static void set_from_env(const char **var, const char *envname)
366 {
367 const char *val = getenv(envname);
368 if (val)
369 *var = val;
370 }
371
372 void http_init(struct remote *remote)
373 {
374 char *low_speed_limit;
375 char *low_speed_time;
376
377 http_is_verbose = 0;
378
379 git_config(http_options, NULL);
380
381 curl_global_init(CURL_GLOBAL_ALL);
382
383 if (remote && remote->http_proxy)
384 curl_http_proxy = xstrdup(remote->http_proxy);
385
386 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
387 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
388
389 #ifdef USE_CURL_MULTI
390 {
391 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
392 if (http_max_requests != NULL)
393 max_requests = atoi(http_max_requests);
394 }
395
396 curlm = curl_multi_init();
397 if (curlm == NULL) {
398 fprintf(stderr, "Error creating curl multi handle.\n");
399 exit(1);
400 }
401 #endif
402
403 if (getenv("GIT_SSL_NO_VERIFY"))
404 curl_ssl_verify = 0;
405
406 set_from_env(&ssl_cert, "GIT_SSL_CERT");
407 #if LIBCURL_VERSION_NUM >= 0x070903
408 set_from_env(&ssl_key, "GIT_SSL_KEY");
409 #endif
410 #if LIBCURL_VERSION_NUM >= 0x070908
411 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
412 #endif
413 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
414
415 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
416
417 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
418 if (low_speed_limit != NULL)
419 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
420 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
421 if (low_speed_time != NULL)
422 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
423
424 if (curl_ssl_verify == -1)
425 curl_ssl_verify = 1;
426
427 curl_session_count = 0;
428 #ifdef USE_CURL_MULTI
429 if (max_requests < 1)
430 max_requests = DEFAULT_MAX_REQUESTS;
431 #endif
432
433 if (getenv("GIT_CURL_FTP_NO_EPSV"))
434 curl_ftp_no_epsv = 1;
435
436 if (remote && remote->url && remote->url[0]) {
437 http_auth_init(remote->url[0]);
438 if (!ssl_cert_password_required &&
439 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
440 !prefixcmp(remote->url[0], "https://"))
441 ssl_cert_password_required = 1;
442 }
443
444 #ifndef NO_CURL_EASY_DUPHANDLE
445 curl_default = get_curl_handle();
446 #endif
447 }
448
449 void http_cleanup(void)
450 {
451 struct active_request_slot *slot = active_queue_head;
452
453 while (slot != NULL) {
454 struct active_request_slot *next = slot->next;
455 if (slot->curl != NULL) {
456 #ifdef USE_CURL_MULTI
457 curl_multi_remove_handle(curlm, slot->curl);
458 #endif
459 curl_easy_cleanup(slot->curl);
460 }
461 free(slot);
462 slot = next;
463 }
464 active_queue_head = NULL;
465
466 #ifndef NO_CURL_EASY_DUPHANDLE
467 curl_easy_cleanup(curl_default);
468 #endif
469
470 #ifdef USE_CURL_MULTI
471 curl_multi_cleanup(curlm);
472 #endif
473 curl_global_cleanup();
474
475 curl_slist_free_all(pragma_header);
476 pragma_header = NULL;
477
478 curl_slist_free_all(no_pragma_header);
479 no_pragma_header = NULL;
480
481 if (curl_http_proxy) {
482 free((void *)curl_http_proxy);
483 curl_http_proxy = NULL;
484 }
485
486 if (ssl_cert_password != NULL) {
487 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
488 free(ssl_cert_password);
489 ssl_cert_password = NULL;
490 }
491 ssl_cert_password_required = 0;
492 }
493
494 struct active_request_slot *get_active_slot(void)
495 {
496 struct active_request_slot *slot = active_queue_head;
497 struct active_request_slot *newslot;
498
499 #ifdef USE_CURL_MULTI
500 int num_transfers;
501
502 /* Wait for a slot to open up if the queue is full */
503 while (active_requests >= max_requests) {
504 curl_multi_perform(curlm, &num_transfers);
505 if (num_transfers < active_requests)
506 process_curl_messages();
507 }
508 #endif
509
510 while (slot != NULL && slot->in_use)
511 slot = slot->next;
512
513 if (slot == NULL) {
514 newslot = xmalloc(sizeof(*newslot));
515 newslot->curl = NULL;
516 newslot->in_use = 0;
517 newslot->next = NULL;
518
519 slot = active_queue_head;
520 if (slot == NULL) {
521 active_queue_head = newslot;
522 } else {
523 while (slot->next != NULL)
524 slot = slot->next;
525 slot->next = newslot;
526 }
527 slot = newslot;
528 }
529
530 if (slot->curl == NULL) {
531 #ifdef NO_CURL_EASY_DUPHANDLE
532 slot->curl = get_curl_handle();
533 #else
534 slot->curl = curl_easy_duphandle(curl_default);
535 #endif
536 curl_session_count++;
537 }
538
539 active_requests++;
540 slot->in_use = 1;
541 slot->local = NULL;
542 slot->results = NULL;
543 slot->finished = NULL;
544 slot->callback_data = NULL;
545 slot->callback_func = NULL;
546 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
547 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
548 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
549 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
550 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
551 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
552 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
553 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
554 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
555
556 return slot;
557 }
558
559 int start_active_slot(struct active_request_slot *slot)
560 {
561 #ifdef USE_CURL_MULTI
562 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
563 int num_transfers;
564
565 if (curlm_result != CURLM_OK &&
566 curlm_result != CURLM_CALL_MULTI_PERFORM) {
567 active_requests--;
568 slot->in_use = 0;
569 return 0;
570 }
571
572 /*
573 * We know there must be something to do, since we just added
574 * something.
575 */
576 curl_multi_perform(curlm, &num_transfers);
577 #endif
578 return 1;
579 }
580
581 #ifdef USE_CURL_MULTI
582 struct fill_chain {
583 void *data;
584 int (*fill)(void *);
585 struct fill_chain *next;
586 };
587
588 static struct fill_chain *fill_cfg;
589
590 void add_fill_function(void *data, int (*fill)(void *))
591 {
592 struct fill_chain *new = xmalloc(sizeof(*new));
593 struct fill_chain **linkp = &fill_cfg;
594 new->data = data;
595 new->fill = fill;
596 new->next = NULL;
597 while (*linkp)
598 linkp = &(*linkp)->next;
599 *linkp = new;
600 }
601
602 void fill_active_slots(void)
603 {
604 struct active_request_slot *slot = active_queue_head;
605
606 while (active_requests < max_requests) {
607 struct fill_chain *fill;
608 for (fill = fill_cfg; fill; fill = fill->next)
609 if (fill->fill(fill->data))
610 break;
611
612 if (!fill)
613 break;
614 }
615
616 while (slot != NULL) {
617 if (!slot->in_use && slot->curl != NULL
618 && curl_session_count > min_curl_sessions) {
619 curl_easy_cleanup(slot->curl);
620 slot->curl = NULL;
621 curl_session_count--;
622 }
623 slot = slot->next;
624 }
625 }
626
627 void step_active_slots(void)
628 {
629 int num_transfers;
630 CURLMcode curlm_result;
631
632 do {
633 curlm_result = curl_multi_perform(curlm, &num_transfers);
634 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
635 if (num_transfers < active_requests) {
636 process_curl_messages();
637 fill_active_slots();
638 }
639 }
640 #endif
641
642 void run_active_slot(struct active_request_slot *slot)
643 {
644 #ifdef USE_CURL_MULTI
645 long last_pos = 0;
646 long current_pos;
647 fd_set readfds;
648 fd_set writefds;
649 fd_set excfds;
650 int max_fd;
651 struct timeval select_timeout;
652 int finished = 0;
653
654 slot->finished = &finished;
655 while (!finished) {
656 data_received = 0;
657 step_active_slots();
658
659 if (!data_received && slot->local != NULL) {
660 current_pos = ftell(slot->local);
661 if (current_pos > last_pos)
662 data_received++;
663 last_pos = current_pos;
664 }
665
666 if (slot->in_use && !data_received) {
667 max_fd = 0;
668 FD_ZERO(&readfds);
669 FD_ZERO(&writefds);
670 FD_ZERO(&excfds);
671 select_timeout.tv_sec = 0;
672 select_timeout.tv_usec = 50000;
673 select(max_fd, &readfds, &writefds,
674 &excfds, &select_timeout);
675 }
676 }
677 #else
678 while (slot->in_use) {
679 slot->curl_result = curl_easy_perform(slot->curl);
680 finish_active_slot(slot);
681 }
682 #endif
683 }
684
685 static void closedown_active_slot(struct active_request_slot *slot)
686 {
687 active_requests--;
688 slot->in_use = 0;
689 }
690
691 static void release_active_slot(struct active_request_slot *slot)
692 {
693 closedown_active_slot(slot);
694 if (slot->curl && curl_session_count > min_curl_sessions) {
695 #ifdef USE_CURL_MULTI
696 curl_multi_remove_handle(curlm, slot->curl);
697 #endif
698 curl_easy_cleanup(slot->curl);
699 slot->curl = NULL;
700 curl_session_count--;
701 }
702 #ifdef USE_CURL_MULTI
703 fill_active_slots();
704 #endif
705 }
706
707 void finish_active_slot(struct active_request_slot *slot)
708 {
709 closedown_active_slot(slot);
710 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
711
712 if (slot->finished != NULL)
713 (*slot->finished) = 1;
714
715 /* Store slot results so they can be read after the slot is reused */
716 if (slot->results != NULL) {
717 slot->results->curl_result = slot->curl_result;
718 slot->results->http_code = slot->http_code;
719 }
720
721 /* Run callback if appropriate */
722 if (slot->callback_func != NULL)
723 slot->callback_func(slot->callback_data);
724 }
725
726 void finish_all_active_slots(void)
727 {
728 struct active_request_slot *slot = active_queue_head;
729
730 while (slot != NULL)
731 if (slot->in_use) {
732 run_active_slot(slot);
733 slot = active_queue_head;
734 } else {
735 slot = slot->next;
736 }
737 }
738
739 /* Helpers for modifying and creating URLs */
740 static inline int needs_quote(int ch)
741 {
742 if (((ch >= 'A') && (ch <= 'Z'))
743 || ((ch >= 'a') && (ch <= 'z'))
744 || ((ch >= '0') && (ch <= '9'))
745 || (ch == '/')
746 || (ch == '-')
747 || (ch == '.'))
748 return 0;
749 return 1;
750 }
751
752 static inline int hex(int v)
753 {
754 if (v < 10)
755 return '0' + v;
756 else
757 return 'A' + v - 10;
758 }
759
760 static char *quote_ref_url(const char *base, const char *ref)
761 {
762 struct strbuf buf = STRBUF_INIT;
763 const char *cp;
764 int ch;
765
766 end_url_with_slash(&buf, base);
767
768 for (cp = ref; (ch = *cp) != 0; cp++)
769 if (needs_quote(ch))
770 strbuf_addf(&buf, "%%%02x", ch);
771 else
772 strbuf_addch(&buf, *cp);
773
774 return strbuf_detach(&buf, NULL);
775 }
776
777 void append_remote_object_url(struct strbuf *buf, const char *url,
778 const char *hex,
779 int only_two_digit_prefix)
780 {
781 end_url_with_slash(buf, url);
782
783 strbuf_addf(buf, "objects/%.*s/", 2, hex);
784 if (!only_two_digit_prefix)
785 strbuf_addf(buf, "%s", hex+2);
786 }
787
788 char *get_remote_object_url(const char *url, const char *hex,
789 int only_two_digit_prefix)
790 {
791 struct strbuf buf = STRBUF_INIT;
792 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
793 return strbuf_detach(&buf, NULL);
794 }
795
796 /* http_request() targets */
797 #define HTTP_REQUEST_STRBUF 0
798 #define HTTP_REQUEST_FILE 1
799
800 static int http_request(const char *url, void *result, int target, int options)
801 {
802 struct active_request_slot *slot;
803 struct slot_results results;
804 struct curl_slist *headers = NULL;
805 struct strbuf buf = STRBUF_INIT;
806 int ret;
807
808 slot = get_active_slot();
809 slot->results = &results;
810 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
811
812 if (result == NULL) {
813 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
814 } else {
815 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
816 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
817
818 if (target == HTTP_REQUEST_FILE) {
819 long posn = ftell(result);
820 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
821 fwrite);
822 if (posn > 0) {
823 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
824 headers = curl_slist_append(headers, buf.buf);
825 strbuf_reset(&buf);
826 }
827 slot->local = result;
828 } else
829 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
830 fwrite_buffer);
831 }
832
833 strbuf_addstr(&buf, "Pragma:");
834 if (options & HTTP_NO_CACHE)
835 strbuf_addstr(&buf, " no-cache");
836
837 headers = curl_slist_append(headers, buf.buf);
838
839 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
840 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
841
842 if (start_active_slot(slot)) {
843 run_active_slot(slot);
844 if (results.curl_result == CURLE_OK)
845 ret = HTTP_OK;
846 else if (missing_target(&results))
847 ret = HTTP_MISSING_TARGET;
848 else if (results.http_code == 401) {
849 if (user_name) {
850 ret = HTTP_NOAUTH;
851 } else {
852 /*
853 * git_getpass is needed here because its very likely stdin/stdout are
854 * pipes to our parent process. So we instead need to use /dev/tty,
855 * but that is non-portable. Using git_getpass() can at least be stubbed
856 * on other platforms with a different implementation if/when necessary.
857 */
858 user_name = xstrdup(git_getpass_with_description("Username", description));
859 init_curl_http_auth(slot->curl);
860 ret = HTTP_REAUTH;
861 }
862 } else
863 ret = HTTP_ERROR;
864 } else {
865 error("Unable to start HTTP request for %s", url);
866 ret = HTTP_START_FAILED;
867 }
868
869 slot->local = NULL;
870 curl_slist_free_all(headers);
871 strbuf_release(&buf);
872
873 return ret;
874 }
875
876 static int http_request_reauth(const char *url, void *result, int target,
877 int options)
878 {
879 int ret = http_request(url, result, target, options);
880 if (ret != HTTP_REAUTH)
881 return ret;
882 return http_request(url, result, target, options);
883 }
884
885 int http_get_strbuf(const char *url, struct strbuf *result, int options)
886 {
887 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
888 }
889
890 /*
891 * Downloads an url and stores the result in the given file.
892 *
893 * If a previous interrupted download is detected (i.e. a previous temporary
894 * file is still around) the download is resumed.
895 */
896 static int http_get_file(const char *url, const char *filename, int options)
897 {
898 int ret;
899 struct strbuf tmpfile = STRBUF_INIT;
900 FILE *result;
901
902 strbuf_addf(&tmpfile, "%s.temp", filename);
903 result = fopen(tmpfile.buf, "a");
904 if (! result) {
905 error("Unable to open local file %s", tmpfile.buf);
906 ret = HTTP_ERROR;
907 goto cleanup;
908 }
909
910 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
911 fclose(result);
912
913 if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
914 ret = HTTP_ERROR;
915 cleanup:
916 strbuf_release(&tmpfile);
917 return ret;
918 }
919
920 int http_error(const char *url, int ret)
921 {
922 /* http_request has already handled HTTP_START_FAILED. */
923 if (ret != HTTP_START_FAILED)
924 error("%s while accessing %s\n", curl_errorstr, url);
925
926 return ret;
927 }
928
929 int http_fetch_ref(const char *base, struct ref *ref)
930 {
931 char *url;
932 struct strbuf buffer = STRBUF_INIT;
933 int ret = -1;
934
935 url = quote_ref_url(base, ref->name);
936 if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
937 strbuf_rtrim(&buffer);
938 if (buffer.len == 40)
939 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
940 else if (!prefixcmp(buffer.buf, "ref: ")) {
941 ref->symref = xstrdup(buffer.buf + 5);
942 ret = 0;
943 }
944 }
945
946 strbuf_release(&buffer);
947 free(url);
948 return ret;
949 }
950
951 /* Helpers for fetching packs */
952 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
953 {
954 char *url, *tmp;
955 struct strbuf buf = STRBUF_INIT;
956
957 if (http_is_verbose)
958 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
959
960 end_url_with_slash(&buf, base_url);
961 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
962 url = strbuf_detach(&buf, NULL);
963
964 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
965 tmp = strbuf_detach(&buf, NULL);
966
967 if (http_get_file(url, tmp, 0) != HTTP_OK) {
968 error("Unable to get pack index %s\n", url);
969 free(tmp);
970 tmp = NULL;
971 }
972
973 free(url);
974 return tmp;
975 }
976
977 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
978 unsigned char *sha1, const char *base_url)
979 {
980 struct packed_git *new_pack;
981 char *tmp_idx = NULL;
982 int ret;
983
984 if (has_pack_index(sha1)) {
985 new_pack = parse_pack_index(sha1, NULL);
986 if (!new_pack)
987 return -1; /* parse_pack_index() already issued error message */
988 goto add_pack;
989 }
990
991 tmp_idx = fetch_pack_index(sha1, base_url);
992 if (!tmp_idx)
993 return -1;
994
995 new_pack = parse_pack_index(sha1, tmp_idx);
996 if (!new_pack) {
997 unlink(tmp_idx);
998 free(tmp_idx);
999
1000 return -1; /* parse_pack_index() already issued error message */
1001 }
1002
1003 ret = verify_pack_index(new_pack);
1004 if (!ret) {
1005 close_pack_index(new_pack);
1006 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1007 }
1008 free(tmp_idx);
1009 if (ret)
1010 return -1;
1011
1012 add_pack:
1013 new_pack->next = *packs_head;
1014 *packs_head = new_pack;
1015 return 0;
1016 }
1017
1018 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1019 {
1020 int ret = 0, i = 0;
1021 char *url, *data;
1022 struct strbuf buf = STRBUF_INIT;
1023 unsigned char sha1[20];
1024
1025 end_url_with_slash(&buf, base_url);
1026 strbuf_addstr(&buf, "objects/info/packs");
1027 url = strbuf_detach(&buf, NULL);
1028
1029 ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1030 if (ret != HTTP_OK)
1031 goto cleanup;
1032
1033 data = buf.buf;
1034 while (i < buf.len) {
1035 switch (data[i]) {
1036 case 'P':
1037 i++;
1038 if (i + 52 <= buf.len &&
1039 !prefixcmp(data + i, " pack-") &&
1040 !prefixcmp(data + i + 46, ".pack\n")) {
1041 get_sha1_hex(data + i + 6, sha1);
1042 fetch_and_setup_pack_index(packs_head, sha1,
1043 base_url);
1044 i += 51;
1045 break;
1046 }
1047 default:
1048 while (i < buf.len && data[i] != '\n')
1049 i++;
1050 }
1051 i++;
1052 }
1053
1054 cleanup:
1055 free(url);
1056 return ret;
1057 }
1058
1059 void release_http_pack_request(struct http_pack_request *preq)
1060 {
1061 if (preq->packfile != NULL) {
1062 fclose(preq->packfile);
1063 preq->packfile = NULL;
1064 preq->slot->local = NULL;
1065 }
1066 if (preq->range_header != NULL) {
1067 curl_slist_free_all(preq->range_header);
1068 preq->range_header = NULL;
1069 }
1070 preq->slot = NULL;
1071 free(preq->url);
1072 }
1073
1074 int finish_http_pack_request(struct http_pack_request *preq)
1075 {
1076 struct packed_git **lst;
1077 struct packed_git *p = preq->target;
1078 char *tmp_idx;
1079 struct child_process ip;
1080 const char *ip_argv[8];
1081
1082 close_pack_index(p);
1083
1084 fclose(preq->packfile);
1085 preq->packfile = NULL;
1086 preq->slot->local = NULL;
1087
1088 lst = preq->lst;
1089 while (*lst != p)
1090 lst = &((*lst)->next);
1091 *lst = (*lst)->next;
1092
1093 tmp_idx = xstrdup(preq->tmpfile);
1094 strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1095 ".idx.temp");
1096
1097 ip_argv[0] = "index-pack";
1098 ip_argv[1] = "-o";
1099 ip_argv[2] = tmp_idx;
1100 ip_argv[3] = preq->tmpfile;
1101 ip_argv[4] = NULL;
1102
1103 memset(&ip, 0, sizeof(ip));
1104 ip.argv = ip_argv;
1105 ip.git_cmd = 1;
1106 ip.no_stdin = 1;
1107 ip.no_stdout = 1;
1108
1109 if (run_command(&ip)) {
1110 unlink(preq->tmpfile);
1111 unlink(tmp_idx);
1112 free(tmp_idx);
1113 return -1;
1114 }
1115
1116 unlink(sha1_pack_index_name(p->sha1));
1117
1118 if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1119 || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1120 free(tmp_idx);
1121 return -1;
1122 }
1123
1124 install_packed_git(p);
1125 free(tmp_idx);
1126 return 0;
1127 }
1128
1129 struct http_pack_request *new_http_pack_request(
1130 struct packed_git *target, const char *base_url)
1131 {
1132 long prev_posn = 0;
1133 char range[RANGE_HEADER_SIZE];
1134 struct strbuf buf = STRBUF_INIT;
1135 struct http_pack_request *preq;
1136
1137 preq = xmalloc(sizeof(*preq));
1138 preq->target = target;
1139 preq->range_header = NULL;
1140
1141 end_url_with_slash(&buf, base_url);
1142 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1143 sha1_to_hex(target->sha1));
1144 preq->url = strbuf_detach(&buf, NULL);
1145
1146 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1147 sha1_pack_name(target->sha1));
1148 preq->packfile = fopen(preq->tmpfile, "a");
1149 if (!preq->packfile) {
1150 error("Unable to open local file %s for pack",
1151 preq->tmpfile);
1152 goto abort;
1153 }
1154
1155 preq->slot = get_active_slot();
1156 preq->slot->local = preq->packfile;
1157 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1158 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1159 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1160 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1161 no_pragma_header);
1162
1163 /*
1164 * If there is data present from a previous transfer attempt,
1165 * resume where it left off
1166 */
1167 prev_posn = ftell(preq->packfile);
1168 if (prev_posn>0) {
1169 if (http_is_verbose)
1170 fprintf(stderr,
1171 "Resuming fetch of pack %s at byte %ld\n",
1172 sha1_to_hex(target->sha1), prev_posn);
1173 sprintf(range, "Range: bytes=%ld-", prev_posn);
1174 preq->range_header = curl_slist_append(NULL, range);
1175 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1176 preq->range_header);
1177 }
1178
1179 return preq;
1180
1181 abort:
1182 free(preq->url);
1183 free(preq);
1184 return NULL;
1185 }
1186
1187 /* Helpers for fetching objects (loose) */
1188 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1189 void *data)
1190 {
1191 unsigned char expn[4096];
1192 size_t size = eltsize * nmemb;
1193 int posn = 0;
1194 struct http_object_request *freq =
1195 (struct http_object_request *)data;
1196 do {
1197 ssize_t retval = xwrite(freq->localfile,
1198 (char *) ptr + posn, size - posn);
1199 if (retval < 0)
1200 return posn;
1201 posn += retval;
1202 } while (posn < size);
1203
1204 freq->stream.avail_in = size;
1205 freq->stream.next_in = (void *)ptr;
1206 do {
1207 freq->stream.next_out = expn;
1208 freq->stream.avail_out = sizeof(expn);
1209 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1210 git_SHA1_Update(&freq->c, expn,
1211 sizeof(expn) - freq->stream.avail_out);
1212 } while (freq->stream.avail_in && freq->zret == Z_OK);
1213 data_received++;
1214 return size;
1215 }
1216
1217 struct http_object_request *new_http_object_request(const char *base_url,
1218 unsigned char *sha1)
1219 {
1220 char *hex = sha1_to_hex(sha1);
1221 char *filename;
1222 char prevfile[PATH_MAX];
1223 int prevlocal;
1224 char prev_buf[PREV_BUF_SIZE];
1225 ssize_t prev_read = 0;
1226 long prev_posn = 0;
1227 char range[RANGE_HEADER_SIZE];
1228 struct curl_slist *range_header = NULL;
1229 struct http_object_request *freq;
1230
1231 freq = xmalloc(sizeof(*freq));
1232 hashcpy(freq->sha1, sha1);
1233 freq->localfile = -1;
1234
1235 filename = sha1_file_name(sha1);
1236 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1237 "%s.temp", filename);
1238
1239 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1240 unlink_or_warn(prevfile);
1241 rename(freq->tmpfile, prevfile);
1242 unlink_or_warn(freq->tmpfile);
1243
1244 if (freq->localfile != -1)
1245 error("fd leakage in start: %d", freq->localfile);
1246 freq->localfile = open(freq->tmpfile,
1247 O_WRONLY | O_CREAT | O_EXCL, 0666);
1248 /*
1249 * This could have failed due to the "lazy directory creation";
1250 * try to mkdir the last path component.
1251 */
1252 if (freq->localfile < 0 && errno == ENOENT) {
1253 char *dir = strrchr(freq->tmpfile, '/');
1254 if (dir) {
1255 *dir = 0;
1256 mkdir(freq->tmpfile, 0777);
1257 *dir = '/';
1258 }
1259 freq->localfile = open(freq->tmpfile,
1260 O_WRONLY | O_CREAT | O_EXCL, 0666);
1261 }
1262
1263 if (freq->localfile < 0) {
1264 error("Couldn't create temporary file %s: %s",
1265 freq->tmpfile, strerror(errno));
1266 goto abort;
1267 }
1268
1269 memset(&freq->stream, 0, sizeof(freq->stream));
1270
1271 git_inflate_init(&freq->stream);
1272
1273 git_SHA1_Init(&freq->c);
1274
1275 freq->url = get_remote_object_url(base_url, hex, 0);
1276
1277 /*
1278 * If a previous temp file is present, process what was already
1279 * fetched.
1280 */
1281 prevlocal = open(prevfile, O_RDONLY);
1282 if (prevlocal != -1) {
1283 do {
1284 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1285 if (prev_read>0) {
1286 if (fwrite_sha1_file(prev_buf,
1287 1,
1288 prev_read,
1289 freq) == prev_read) {
1290 prev_posn += prev_read;
1291 } else {
1292 prev_read = -1;
1293 }
1294 }
1295 } while (prev_read > 0);
1296 close(prevlocal);
1297 }
1298 unlink_or_warn(prevfile);
1299
1300 /*
1301 * Reset inflate/SHA1 if there was an error reading the previous temp
1302 * file; also rewind to the beginning of the local file.
1303 */
1304 if (prev_read == -1) {
1305 memset(&freq->stream, 0, sizeof(freq->stream));
1306 git_inflate_init(&freq->stream);
1307 git_SHA1_Init(&freq->c);
1308 if (prev_posn>0) {
1309 prev_posn = 0;
1310 lseek(freq->localfile, 0, SEEK_SET);
1311 if (ftruncate(freq->localfile, 0) < 0) {
1312 error("Couldn't truncate temporary file %s: %s",
1313 freq->tmpfile, strerror(errno));
1314 goto abort;
1315 }
1316 }
1317 }
1318
1319 freq->slot = get_active_slot();
1320
1321 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1322 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1323 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1324 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1325 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1326
1327 /*
1328 * If we have successfully processed data from a previous fetch
1329 * attempt, only fetch the data we don't already have.
1330 */
1331 if (prev_posn>0) {
1332 if (http_is_verbose)
1333 fprintf(stderr,
1334 "Resuming fetch of object %s at byte %ld\n",
1335 hex, prev_posn);
1336 sprintf(range, "Range: bytes=%ld-", prev_posn);
1337 range_header = curl_slist_append(range_header, range);
1338 curl_easy_setopt(freq->slot->curl,
1339 CURLOPT_HTTPHEADER, range_header);
1340 }
1341
1342 return freq;
1343
1344 abort:
1345 free(filename);
1346 free(freq->url);
1347 free(freq);
1348 return NULL;
1349 }
1350
1351 void process_http_object_request(struct http_object_request *freq)
1352 {
1353 if (freq->slot == NULL)
1354 return;
1355 freq->curl_result = freq->slot->curl_result;
1356 freq->http_code = freq->slot->http_code;
1357 freq->slot = NULL;
1358 }
1359
1360 int finish_http_object_request(struct http_object_request *freq)
1361 {
1362 struct stat st;
1363
1364 close(freq->localfile);
1365 freq->localfile = -1;
1366
1367 process_http_object_request(freq);
1368
1369 if (freq->http_code == 416) {
1370 warning("requested range invalid; we may already have all the data.");
1371 } else if (freq->curl_result != CURLE_OK) {
1372 if (stat(freq->tmpfile, &st) == 0)
1373 if (st.st_size == 0)
1374 unlink_or_warn(freq->tmpfile);
1375 return -1;
1376 }
1377
1378 git_inflate_end(&freq->stream);
1379 git_SHA1_Final(freq->real_sha1, &freq->c);
1380 if (freq->zret != Z_STREAM_END) {
1381 unlink_or_warn(freq->tmpfile);
1382 return -1;
1383 }
1384 if (hashcmp(freq->sha1, freq->real_sha1)) {
1385 unlink_or_warn(freq->tmpfile);
1386 return -1;
1387 }
1388 freq->rename =
1389 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1390
1391 return freq->rename;
1392 }
1393
1394 void abort_http_object_request(struct http_object_request *freq)
1395 {
1396 unlink_or_warn(freq->tmpfile);
1397
1398 release_http_object_request(freq);
1399 }
1400
1401 void release_http_object_request(struct http_object_request *freq)
1402 {
1403 if (freq->localfile != -1) {
1404 close(freq->localfile);
1405 freq->localfile = -1;
1406 }
1407 if (freq->url != NULL) {
1408 free(freq->url);
1409 freq->url = NULL;
1410 }
1411 if (freq->slot != NULL) {
1412 freq->slot->callback_func = NULL;
1413 freq->slot->callback_data = NULL;
1414 release_active_slot(freq->slot);
1415 freq->slot = NULL;
1416 }
1417 }
Eric Wong's git-svn branch