4 #include "run-command.h"
6 #include "credential.h"
12 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
14 #if LIBCURL_VERSION_NUM >= 0x070a06
15 #define LIBCURL_CAN_HANDLE_AUTH_ANY
18 static int min_curl_sessions = 1;
19 static int curl_session_count;
21 static int max_requests = -1;
24 #ifndef NO_CURL_EASY_DUPHANDLE
25 static CURL *curl_default;
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
31 char curl_errorstr[CURL_ERROR_SIZE];
33 static int curl_ssl_verify = -1;
34 static const char *ssl_cert;
35 #if LIBCURL_VERSION_NUM >= 0x070903
36 static const char *ssl_key;
38 #if LIBCURL_VERSION_NUM >= 0x070908
39 static const char *ssl_capath;
41 static const char *ssl_cainfo;
42 static long curl_low_speed_limit = -1;
43 static long curl_low_speed_time = -1;
44 static int curl_ftp_no_epsv;
45 static const char *curl_http_proxy;
46 static const char *curl_cookie_file;
47 static struct credential http_auth = CREDENTIAL_INIT;
48 static int http_proactive_auth;
49 static const char *user_agent;
51 #if LIBCURL_VERSION_NUM >= 0x071700
52 /* Use CURLOPT_KEYPASSWD as is */
53 #elif LIBCURL_VERSION_NUM >= 0x070903
54 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
56 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
59 static struct credential cert_auth = CREDENTIAL_INIT;
60 static int ssl_cert_password_required;
62 static struct curl_slist *pragma_header;
63 static struct curl_slist *no_pragma_header;
65 static struct active_request_slot *active_queue_head;
67 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
69 size_t size = eltsize * nmemb;
70 struct buffer *buffer = buffer_;
72 if (size > buffer->buf.len - buffer->posn)
73 size = buffer->buf.len - buffer->posn;
74 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
81 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
83 struct buffer *buffer = clientp;
89 case CURLIOCMD_RESTARTREAD:
94 return CURLIOE_UNKNOWNCMD;
99 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
101 size_t size = eltsize * nmemb;
102 struct strbuf *buffer = buffer_;
104 strbuf_add(buffer, ptr, size);
108 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
110 return eltsize * nmemb;
113 #ifdef USE_CURL_MULTI
114 static void process_curl_messages(void)
117 struct active_request_slot *slot;
118 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
120 while (curl_message != NULL) {
121 if (curl_message->msg == CURLMSG_DONE) {
122 int curl_result = curl_message->data.result;
123 slot = active_queue_head;
124 while (slot != NULL &&
125 slot->curl != curl_message->easy_handle)
128 curl_multi_remove_handle(curlm, slot->curl);
129 slot->curl_result = curl_result;
130 finish_active_slot(slot);
132 fprintf(stderr, "Received DONE message for unknown request!\n");
135 fprintf(stderr, "Unknown CURL message received: %d\n",
136 (int)curl_message->msg);
138 curl_message = curl_multi_info_read(curlm, &num_messages);
143 static int http_options(const char *var, const char *value, void *cb)
145 if (!strcmp("http.sslverify", var)) {
146 curl_ssl_verify = git_config_bool(var, value);
149 if (!strcmp("http.sslcert", var))
150 return git_config_string(&ssl_cert, var, value);
151 #if LIBCURL_VERSION_NUM >= 0x070903
152 if (!strcmp("http.sslkey", var))
153 return git_config_string(&ssl_key, var, value);
155 #if LIBCURL_VERSION_NUM >= 0x070908
156 if (!strcmp("http.sslcapath", var))
157 return git_config_string(&ssl_capath, var, value);
159 if (!strcmp("http.sslcainfo", var))
160 return git_config_string(&ssl_cainfo, var, value);
161 if (!strcmp("http.sslcertpasswordprotected", var)) {
162 if (git_config_bool(var, value))
163 ssl_cert_password_required = 1;
166 if (!strcmp("http.minsessions", var)) {
167 min_curl_sessions = git_config_int(var, value);
168 #ifndef USE_CURL_MULTI
169 if (min_curl_sessions > 1)
170 min_curl_sessions = 1;
174 #ifdef USE_CURL_MULTI
175 if (!strcmp("http.maxrequests", var)) {
176 max_requests = git_config_int(var, value);
180 if (!strcmp("http.lowspeedlimit", var)) {
181 curl_low_speed_limit = (long)git_config_int(var, value);
184 if (!strcmp("http.lowspeedtime", var)) {
185 curl_low_speed_time = (long)git_config_int(var, value);
189 if (!strcmp("http.noepsv", var)) {
190 curl_ftp_no_epsv = git_config_bool(var, value);
193 if (!strcmp("http.proxy", var))
194 return git_config_string(&curl_http_proxy, var, value);
196 if (!strcmp("http.cookiefile", var))
197 return git_config_string(&curl_cookie_file, var, value);
199 if (!strcmp("http.postbuffer", var)) {
200 http_post_buffer = git_config_int(var, value);
201 if (http_post_buffer < LARGE_PACKET_MAX)
202 http_post_buffer = LARGE_PACKET_MAX;
206 if (!strcmp("http.useragent", var))
207 return git_config_string(&user_agent, var, value);
209 /* Fall back on the default ones */
210 return git_default_config(var, value, cb);
213 static void init_curl_http_auth(CURL *result)
215 if (!http_auth.username)
218 credential_fill(&http_auth);
220 #if LIBCURL_VERSION_NUM >= 0x071301
221 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
222 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
225 static struct strbuf up = STRBUF_INIT;
227 strbuf_addf(&up, "%s:%s",
228 http_auth.username, http_auth.password);
229 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
234 static int has_cert_password(void)
236 if (ssl_cert == NULL || ssl_cert_password_required != 1)
238 if (!cert_auth.password) {
239 cert_auth.protocol = xstrdup("cert");
240 cert_auth.username = xstrdup("");
241 cert_auth.path = xstrdup(ssl_cert);
242 credential_fill(&cert_auth);
247 static CURL *get_curl_handle(void)
249 CURL *result = curl_easy_init();
251 if (!curl_ssl_verify) {
252 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
253 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
255 /* Verify authenticity of the peer's certificate */
256 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
257 /* The name in the cert must match whom we tried to connect */
258 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
261 #if LIBCURL_VERSION_NUM >= 0x070907
262 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
264 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
265 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
268 if (http_proactive_auth)
269 init_curl_http_auth(result);
271 if (ssl_cert != NULL)
272 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
273 if (has_cert_password())
274 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
275 #if LIBCURL_VERSION_NUM >= 0x070903
277 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
279 #if LIBCURL_VERSION_NUM >= 0x070908
280 if (ssl_capath != NULL)
281 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
283 if (ssl_cainfo != NULL)
284 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
286 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
287 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
288 curl_low_speed_limit);
289 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
290 curl_low_speed_time);
293 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
294 #if LIBCURL_VERSION_NUM >= 0x071301
295 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
296 #elif LIBCURL_VERSION_NUM >= 0x071101
297 curl_easy_setopt(result, CURLOPT_POST301, 1);
300 if (getenv("GIT_CURL_VERBOSE"))
301 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
303 curl_easy_setopt(result, CURLOPT_USERAGENT,
304 user_agent ? user_agent : git_user_agent());
306 if (curl_ftp_no_epsv)
307 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
309 if (curl_http_proxy) {
310 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
311 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
317 static void set_from_env(const char **var, const char *envname)
319 const char *val = getenv(envname);
324 void http_init(struct remote *remote, const char *url, int proactive_auth)
326 char *low_speed_limit;
327 char *low_speed_time;
331 git_config(http_options, NULL);
333 curl_global_init(CURL_GLOBAL_ALL);
335 http_proactive_auth = proactive_auth;
337 if (remote && remote->http_proxy)
338 curl_http_proxy = xstrdup(remote->http_proxy);
340 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
341 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
343 #ifdef USE_CURL_MULTI
345 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
346 if (http_max_requests != NULL)
347 max_requests = atoi(http_max_requests);
350 curlm = curl_multi_init();
352 fprintf(stderr, "Error creating curl multi handle.\n");
357 if (getenv("GIT_SSL_NO_VERIFY"))
360 set_from_env(&ssl_cert, "GIT_SSL_CERT");
361 #if LIBCURL_VERSION_NUM >= 0x070903
362 set_from_env(&ssl_key, "GIT_SSL_KEY");
364 #if LIBCURL_VERSION_NUM >= 0x070908
365 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
367 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
369 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
371 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
372 if (low_speed_limit != NULL)
373 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
374 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
375 if (low_speed_time != NULL)
376 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
378 if (curl_ssl_verify == -1)
381 curl_session_count = 0;
382 #ifdef USE_CURL_MULTI
383 if (max_requests < 1)
384 max_requests = DEFAULT_MAX_REQUESTS;
387 if (getenv("GIT_CURL_FTP_NO_EPSV"))
388 curl_ftp_no_epsv = 1;
391 credential_from_url(&http_auth, url);
392 if (!ssl_cert_password_required &&
393 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
394 !prefixcmp(url, "https://"))
395 ssl_cert_password_required = 1;
398 #ifndef NO_CURL_EASY_DUPHANDLE
399 curl_default = get_curl_handle();
403 void http_cleanup(void)
405 struct active_request_slot *slot = active_queue_head;
407 while (slot != NULL) {
408 struct active_request_slot *next = slot->next;
409 if (slot->curl != NULL) {
410 #ifdef USE_CURL_MULTI
411 curl_multi_remove_handle(curlm, slot->curl);
413 curl_easy_cleanup(slot->curl);
418 active_queue_head = NULL;
420 #ifndef NO_CURL_EASY_DUPHANDLE
421 curl_easy_cleanup(curl_default);
424 #ifdef USE_CURL_MULTI
425 curl_multi_cleanup(curlm);
427 curl_global_cleanup();
429 curl_slist_free_all(pragma_header);
430 pragma_header = NULL;
432 curl_slist_free_all(no_pragma_header);
433 no_pragma_header = NULL;
435 if (curl_http_proxy) {
436 free((void *)curl_http_proxy);
437 curl_http_proxy = NULL;
440 if (cert_auth.password != NULL) {
441 memset(cert_auth.password, 0, strlen(cert_auth.password));
442 free(cert_auth.password);
443 cert_auth.password = NULL;
445 ssl_cert_password_required = 0;
448 struct active_request_slot *get_active_slot(void)
450 struct active_request_slot *slot = active_queue_head;
451 struct active_request_slot *newslot;
453 #ifdef USE_CURL_MULTI
456 /* Wait for a slot to open up if the queue is full */
457 while (active_requests >= max_requests) {
458 curl_multi_perform(curlm, &num_transfers);
459 if (num_transfers < active_requests)
460 process_curl_messages();
464 while (slot != NULL && slot->in_use)
468 newslot = xmalloc(sizeof(*newslot));
469 newslot->curl = NULL;
471 newslot->next = NULL;
473 slot = active_queue_head;
475 active_queue_head = newslot;
477 while (slot->next != NULL)
479 slot->next = newslot;
484 if (slot->curl == NULL) {
485 #ifdef NO_CURL_EASY_DUPHANDLE
486 slot->curl = get_curl_handle();
488 slot->curl = curl_easy_duphandle(curl_default);
490 curl_session_count++;
495 slot->results = NULL;
496 slot->finished = NULL;
497 slot->callback_data = NULL;
498 slot->callback_func = NULL;
499 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
500 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
501 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
502 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
503 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
504 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
505 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
506 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
507 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
508 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
509 if (http_auth.password)
510 init_curl_http_auth(slot->curl);
515 int start_active_slot(struct active_request_slot *slot)
517 #ifdef USE_CURL_MULTI
518 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
521 if (curlm_result != CURLM_OK &&
522 curlm_result != CURLM_CALL_MULTI_PERFORM) {
529 * We know there must be something to do, since we just added
532 curl_multi_perform(curlm, &num_transfers);
537 #ifdef USE_CURL_MULTI
541 struct fill_chain *next;
544 static struct fill_chain *fill_cfg;
546 void add_fill_function(void *data, int (*fill)(void *))
548 struct fill_chain *new = xmalloc(sizeof(*new));
549 struct fill_chain **linkp = &fill_cfg;
554 linkp = &(*linkp)->next;
558 void fill_active_slots(void)
560 struct active_request_slot *slot = active_queue_head;
562 while (active_requests < max_requests) {
563 struct fill_chain *fill;
564 for (fill = fill_cfg; fill; fill = fill->next)
565 if (fill->fill(fill->data))
572 while (slot != NULL) {
573 if (!slot->in_use && slot->curl != NULL
574 && curl_session_count > min_curl_sessions) {
575 curl_easy_cleanup(slot->curl);
577 curl_session_count--;
583 void step_active_slots(void)
586 CURLMcode curlm_result;
589 curlm_result = curl_multi_perform(curlm, &num_transfers);
590 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
591 if (num_transfers < active_requests) {
592 process_curl_messages();
598 void run_active_slot(struct active_request_slot *slot)
600 #ifdef USE_CURL_MULTI
605 struct timeval select_timeout;
608 slot->finished = &finished;
613 #if LIBCURL_VERSION_NUM >= 0x070f04
615 curl_multi_timeout(curlm, &curl_timeout);
616 if (curl_timeout == 0) {
618 } else if (curl_timeout == -1) {
619 select_timeout.tv_sec = 0;
620 select_timeout.tv_usec = 50000;
622 select_timeout.tv_sec = curl_timeout / 1000;
623 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
626 select_timeout.tv_sec = 0;
627 select_timeout.tv_usec = 50000;
634 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
637 * It can happen that curl_multi_timeout returns a pathologically
638 * long timeout when curl_multi_fdset returns no file descriptors
639 * to read. See commit message for more details.
642 (select_timeout.tv_sec > 0 ||
643 select_timeout.tv_usec > 50000)) {
644 select_timeout.tv_sec = 0;
645 select_timeout.tv_usec = 50000;
648 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
652 while (slot->in_use) {
653 slot->curl_result = curl_easy_perform(slot->curl);
654 finish_active_slot(slot);
659 static void closedown_active_slot(struct active_request_slot *slot)
665 static void release_active_slot(struct active_request_slot *slot)
667 closedown_active_slot(slot);
668 if (slot->curl && curl_session_count > min_curl_sessions) {
669 #ifdef USE_CURL_MULTI
670 curl_multi_remove_handle(curlm, slot->curl);
672 curl_easy_cleanup(slot->curl);
674 curl_session_count--;
676 #ifdef USE_CURL_MULTI
681 void finish_active_slot(struct active_request_slot *slot)
683 closedown_active_slot(slot);
684 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
686 if (slot->finished != NULL)
687 (*slot->finished) = 1;
689 /* Store slot results so they can be read after the slot is reused */
690 if (slot->results != NULL) {
691 slot->results->curl_result = slot->curl_result;
692 slot->results->http_code = slot->http_code;
695 /* Run callback if appropriate */
696 if (slot->callback_func != NULL)
697 slot->callback_func(slot->callback_data);
700 void finish_all_active_slots(void)
702 struct active_request_slot *slot = active_queue_head;
706 run_active_slot(slot);
707 slot = active_queue_head;
713 /* Helpers for modifying and creating URLs */
714 static inline int needs_quote(int ch)
716 if (((ch >= 'A') && (ch <= 'Z'))
717 || ((ch >= 'a') && (ch <= 'z'))
718 || ((ch >= '0') && (ch <= '9'))
726 static char *quote_ref_url(const char *base, const char *ref)
728 struct strbuf buf = STRBUF_INIT;
732 end_url_with_slash(&buf, base);
734 for (cp = ref; (ch = *cp) != 0; cp++)
736 strbuf_addf(&buf, "%%%02x", ch);
738 strbuf_addch(&buf, *cp);
740 return strbuf_detach(&buf, NULL);
743 void append_remote_object_url(struct strbuf *buf, const char *url,
745 int only_two_digit_prefix)
747 end_url_with_slash(buf, url);
749 strbuf_addf(buf, "objects/%.*s/", 2, hex);
750 if (!only_two_digit_prefix)
751 strbuf_addf(buf, "%s", hex+2);
754 char *get_remote_object_url(const char *url, const char *hex,
755 int only_two_digit_prefix)
757 struct strbuf buf = STRBUF_INIT;
758 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
759 return strbuf_detach(&buf, NULL);
762 int handle_curl_result(struct slot_results *results)
765 * If we see a failing http code with CURLE_OK, we have turned off
766 * FAILONERROR (to keep the server's custom error response), and should
767 * translate the code into failure here.
769 if (results->curl_result == CURLE_OK &&
770 results->http_code >= 400) {
771 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
773 * Normally curl will already have put the "reason phrase"
774 * from the server into curl_errorstr; unfortunately without
775 * FAILONERROR it is lost, so we can give only the numeric
778 snprintf(curl_errorstr, sizeof(curl_errorstr),
779 "The requested URL returned error: %ld",
783 if (results->curl_result == CURLE_OK) {
784 credential_approve(&http_auth);
786 } else if (missing_target(results))
787 return HTTP_MISSING_TARGET;
788 else if (results->http_code == 401) {
789 if (http_auth.username && http_auth.password) {
790 credential_reject(&http_auth);
793 credential_fill(&http_auth);
797 #if LIBCURL_VERSION_NUM >= 0x070c00
798 if (!curl_errorstr[0])
799 strlcpy(curl_errorstr,
800 curl_easy_strerror(results->curl_result),
801 sizeof(curl_errorstr));
807 /* http_request() targets */
808 #define HTTP_REQUEST_STRBUF 0
809 #define HTTP_REQUEST_FILE 1
811 static int http_request(const char *url, struct strbuf *type,
812 void *result, int target, int options)
814 struct active_request_slot *slot;
815 struct slot_results results;
816 struct curl_slist *headers = NULL;
817 struct strbuf buf = STRBUF_INIT;
820 slot = get_active_slot();
821 slot->results = &results;
822 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
824 if (result == NULL) {
825 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
827 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
828 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
830 if (target == HTTP_REQUEST_FILE) {
831 long posn = ftell(result);
832 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
835 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
836 headers = curl_slist_append(headers, buf.buf);
840 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
844 strbuf_addstr(&buf, "Pragma:");
845 if (options & HTTP_NO_CACHE)
846 strbuf_addstr(&buf, " no-cache");
847 if (options & HTTP_KEEP_ERROR)
848 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
850 headers = curl_slist_append(headers, buf.buf);
852 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
853 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
854 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
856 if (start_active_slot(slot)) {
857 run_active_slot(slot);
858 ret = handle_curl_result(&results);
860 snprintf(curl_errorstr, sizeof(curl_errorstr),
861 "failed to start HTTP request");
862 ret = HTTP_START_FAILED;
868 curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
870 strbuf_addstr(type, t);
873 curl_slist_free_all(headers);
874 strbuf_release(&buf);
879 static int http_request_reauth(const char *url,
881 void *result, int target,
884 int ret = http_request(url, type, result, target, options);
885 if (ret != HTTP_REAUTH)
889 * If we are using KEEP_ERROR, the previous request may have
890 * put cruft into our output stream; we should clear it out before
891 * making our next request. We only know how to do this for
892 * the strbuf case, but that is enough to satisfy current callers.
894 if (options & HTTP_KEEP_ERROR) {
896 case HTTP_REQUEST_STRBUF:
897 strbuf_reset(result);
900 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
903 return http_request(url, type, result, target, options);
906 int http_get_strbuf(const char *url,
908 struct strbuf *result, int options)
910 return http_request_reauth(url, type, result,
911 HTTP_REQUEST_STRBUF, options);
915 * Downloads a URL and stores the result in the given file.
917 * If a previous interrupted download is detected (i.e. a previous temporary
918 * file is still around) the download is resumed.
920 static int http_get_file(const char *url, const char *filename, int options)
923 struct strbuf tmpfile = STRBUF_INIT;
926 strbuf_addf(&tmpfile, "%s.temp", filename);
927 result = fopen(tmpfile.buf, "a");
929 error("Unable to open local file %s", tmpfile.buf);
934 ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
937 if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
940 strbuf_release(&tmpfile);
944 int http_fetch_ref(const char *base, struct ref *ref)
947 struct strbuf buffer = STRBUF_INIT;
950 url = quote_ref_url(base, ref->name);
951 if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
952 strbuf_rtrim(&buffer);
953 if (buffer.len == 40)
954 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
955 else if (!prefixcmp(buffer.buf, "ref: ")) {
956 ref->symref = xstrdup(buffer.buf + 5);
961 strbuf_release(&buffer);
966 /* Helpers for fetching packs */
967 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
970 struct strbuf buf = STRBUF_INIT;
973 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
975 end_url_with_slash(&buf, base_url);
976 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
977 url = strbuf_detach(&buf, NULL);
979 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
980 tmp = strbuf_detach(&buf, NULL);
982 if (http_get_file(url, tmp, 0) != HTTP_OK) {
983 error("Unable to get pack index %s", url);
992 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
993 unsigned char *sha1, const char *base_url)
995 struct packed_git *new_pack;
996 char *tmp_idx = NULL;
999 if (has_pack_index(sha1)) {
1000 new_pack = parse_pack_index(sha1, NULL);
1002 return -1; /* parse_pack_index() already issued error message */
1006 tmp_idx = fetch_pack_index(sha1, base_url);
1010 new_pack = parse_pack_index(sha1, tmp_idx);
1015 return -1; /* parse_pack_index() already issued error message */
1018 ret = verify_pack_index(new_pack);
1020 close_pack_index(new_pack);
1021 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1028 new_pack->next = *packs_head;
1029 *packs_head = new_pack;
1033 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1037 struct strbuf buf = STRBUF_INIT;
1038 unsigned char sha1[20];
1040 end_url_with_slash(&buf, base_url);
1041 strbuf_addstr(&buf, "objects/info/packs");
1042 url = strbuf_detach(&buf, NULL);
1044 ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1049 while (i < buf.len) {
1053 if (i + 52 <= buf.len &&
1054 !prefixcmp(data + i, " pack-") &&
1055 !prefixcmp(data + i + 46, ".pack\n")) {
1056 get_sha1_hex(data + i + 6, sha1);
1057 fetch_and_setup_pack_index(packs_head, sha1,
1063 while (i < buf.len && data[i] != '\n')
1074 void release_http_pack_request(struct http_pack_request *preq)
1076 if (preq->packfile != NULL) {
1077 fclose(preq->packfile);
1078 preq->packfile = NULL;
1080 if (preq->range_header != NULL) {
1081 curl_slist_free_all(preq->range_header);
1082 preq->range_header = NULL;
1088 int finish_http_pack_request(struct http_pack_request *preq)
1090 struct packed_git **lst;
1091 struct packed_git *p = preq->target;
1093 struct child_process ip;
1094 const char *ip_argv[8];
1096 close_pack_index(p);
1098 fclose(preq->packfile);
1099 preq->packfile = NULL;
1103 lst = &((*lst)->next);
1104 *lst = (*lst)->next;
1106 tmp_idx = xstrdup(preq->tmpfile);
1107 strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1110 ip_argv[0] = "index-pack";
1112 ip_argv[2] = tmp_idx;
1113 ip_argv[3] = preq->tmpfile;
1116 memset(&ip, 0, sizeof(ip));
1122 if (run_command(&ip)) {
1123 unlink(preq->tmpfile);
1129 unlink(sha1_pack_index_name(p->sha1));
1131 if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1132 || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1137 install_packed_git(p);
1142 struct http_pack_request *new_http_pack_request(
1143 struct packed_git *target, const char *base_url)
1146 char range[RANGE_HEADER_SIZE];
1147 struct strbuf buf = STRBUF_INIT;
1148 struct http_pack_request *preq;
1150 preq = xcalloc(1, sizeof(*preq));
1151 preq->target = target;
1153 end_url_with_slash(&buf, base_url);
1154 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1155 sha1_to_hex(target->sha1));
1156 preq->url = strbuf_detach(&buf, NULL);
1158 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1159 sha1_pack_name(target->sha1));
1160 preq->packfile = fopen(preq->tmpfile, "a");
1161 if (!preq->packfile) {
1162 error("Unable to open local file %s for pack",
1167 preq->slot = get_active_slot();
1168 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1169 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1170 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1171 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1175 * If there is data present from a previous transfer attempt,
1176 * resume where it left off
1178 prev_posn = ftell(preq->packfile);
1180 if (http_is_verbose)
1182 "Resuming fetch of pack %s at byte %ld\n",
1183 sha1_to_hex(target->sha1), prev_posn);
1184 sprintf(range, "Range: bytes=%ld-", prev_posn);
1185 preq->range_header = curl_slist_append(NULL, range);
1186 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1187 preq->range_header);
1198 /* Helpers for fetching objects (loose) */
1199 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1202 unsigned char expn[4096];
1203 size_t size = eltsize * nmemb;
1205 struct http_object_request *freq =
1206 (struct http_object_request *)data;
1208 ssize_t retval = xwrite(freq->localfile,
1209 (char *) ptr + posn, size - posn);
1213 } while (posn < size);
1215 freq->stream.avail_in = size;
1216 freq->stream.next_in = (void *)ptr;
1218 freq->stream.next_out = expn;
1219 freq->stream.avail_out = sizeof(expn);
1220 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1221 git_SHA1_Update(&freq->c, expn,
1222 sizeof(expn) - freq->stream.avail_out);
1223 } while (freq->stream.avail_in && freq->zret == Z_OK);
1227 struct http_object_request *new_http_object_request(const char *base_url,
1228 unsigned char *sha1)
1230 char *hex = sha1_to_hex(sha1);
1232 char prevfile[PATH_MAX];
1234 char prev_buf[PREV_BUF_SIZE];
1235 ssize_t prev_read = 0;
1237 char range[RANGE_HEADER_SIZE];
1238 struct curl_slist *range_header = NULL;
1239 struct http_object_request *freq;
1241 freq = xcalloc(1, sizeof(*freq));
1242 hashcpy(freq->sha1, sha1);
1243 freq->localfile = -1;
1245 filename = sha1_file_name(sha1);
1246 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1247 "%s.temp", filename);
1249 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1250 unlink_or_warn(prevfile);
1251 rename(freq->tmpfile, prevfile);
1252 unlink_or_warn(freq->tmpfile);
1254 if (freq->localfile != -1)
1255 error("fd leakage in start: %d", freq->localfile);
1256 freq->localfile = open(freq->tmpfile,
1257 O_WRONLY | O_CREAT | O_EXCL, 0666);
1259 * This could have failed due to the "lazy directory creation";
1260 * try to mkdir the last path component.
1262 if (freq->localfile < 0 && errno == ENOENT) {
1263 char *dir = strrchr(freq->tmpfile, '/');
1266 mkdir(freq->tmpfile, 0777);
1269 freq->localfile = open(freq->tmpfile,
1270 O_WRONLY | O_CREAT | O_EXCL, 0666);
1273 if (freq->localfile < 0) {
1274 error("Couldn't create temporary file %s: %s",
1275 freq->tmpfile, strerror(errno));
1279 git_inflate_init(&freq->stream);
1281 git_SHA1_Init(&freq->c);
1283 freq->url = get_remote_object_url(base_url, hex, 0);
1286 * If a previous temp file is present, process what was already
1289 prevlocal = open(prevfile, O_RDONLY);
1290 if (prevlocal != -1) {
1292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1294 if (fwrite_sha1_file(prev_buf,
1297 freq) == prev_read) {
1298 prev_posn += prev_read;
1303 } while (prev_read > 0);
1306 unlink_or_warn(prevfile);
1309 * Reset inflate/SHA1 if there was an error reading the previous temp
1310 * file; also rewind to the beginning of the local file.
1312 if (prev_read == -1) {
1313 memset(&freq->stream, 0, sizeof(freq->stream));
1314 git_inflate_init(&freq->stream);
1315 git_SHA1_Init(&freq->c);
1318 lseek(freq->localfile, 0, SEEK_SET);
1319 if (ftruncate(freq->localfile, 0) < 0) {
1320 error("Couldn't truncate temporary file %s: %s",
1321 freq->tmpfile, strerror(errno));
1327 freq->slot = get_active_slot();
1329 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1330 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1331 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1332 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1333 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1336 * If we have successfully processed data from a previous fetch
1337 * attempt, only fetch the data we don't already have.
1340 if (http_is_verbose)
1342 "Resuming fetch of object %s at byte %ld\n",
1344 sprintf(range, "Range: bytes=%ld-", prev_posn);
1345 range_header = curl_slist_append(range_header, range);
1346 curl_easy_setopt(freq->slot->curl,
1347 CURLOPT_HTTPHEADER, range_header);
1358 void process_http_object_request(struct http_object_request *freq)
1360 if (freq->slot == NULL)
1362 freq->curl_result = freq->slot->curl_result;
1363 freq->http_code = freq->slot->http_code;
1367 int finish_http_object_request(struct http_object_request *freq)
1371 close(freq->localfile);
1372 freq->localfile = -1;
1374 process_http_object_request(freq);
1376 if (freq->http_code == 416) {
1377 warning("requested range invalid; we may already have all the data.");
1378 } else if (freq->curl_result != CURLE_OK) {
1379 if (stat(freq->tmpfile, &st) == 0)
1380 if (st.st_size == 0)
1381 unlink_or_warn(freq->tmpfile);
1385 git_inflate_end(&freq->stream);
1386 git_SHA1_Final(freq->real_sha1, &freq->c);
1387 if (freq->zret != Z_STREAM_END) {
1388 unlink_or_warn(freq->tmpfile);
1391 if (hashcmp(freq->sha1, freq->real_sha1)) {
1392 unlink_or_warn(freq->tmpfile);
1396 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1398 return freq->rename;
1401 void abort_http_object_request(struct http_object_request *freq)
1403 unlink_or_warn(freq->tmpfile);
1405 release_http_object_request(freq);
1408 void release_http_object_request(struct http_object_request *freq)
1410 if (freq->localfile != -1) {
1411 close(freq->localfile);
1412 freq->localfile = -1;
1414 if (freq->url != NULL) {
1418 if (freq->slot != NULL) {
1419 freq->slot->callback_func = NULL;
1420 freq->slot->callback_data = NULL;
1421 release_active_slot(freq->slot);