68d9d77475822fbbaa43fa01cefbe6e8459199ce
1#include "git-compat-util.h"
2#include "http.h"
3#include "pack.h"
4#include "sideband.h"
5#include "run-command.h"
6#include "url.h"
7#include "urlmatch.h"
8#include "credential.h"
9#include "version.h"
10#include "pkt-line.h"
11#include "gettext.h"
12#include "transport.h"
13static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
15#if LIBCURL_VERSION_NUM >= 0x070a08
16long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
17#else
18long int git_curl_ipresolve;
19#endif
20int active_requests;
21int http_is_verbose;
22size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
23#if LIBCURL_VERSION_NUM >= 0x070a06
25#define LIBCURL_CAN_HANDLE_AUTH_ANY
26#endif
27static int min_curl_sessions = 1;
29static int curl_session_count;
30#ifdef USE_CURL_MULTI
31static int max_requests = -1;
32static CURLM *curlm;
33#endif
34#ifndef NO_CURL_EASY_DUPHANDLE
35static CURL *curl_default;
36#endif
37#define PREV_BUF_SIZE 4096
39char curl_errorstr[CURL_ERROR_SIZE];
41static int curl_ssl_verify = -1;
43static int curl_ssl_try;
44static const char *ssl_cert;
45static const char *ssl_cipherlist;
46static const char *ssl_version;
47static struct {
48 const char *name;
49 long ssl_version;
50} sslversions[] = {
51 { "sslv2", CURL_SSLVERSION_SSLv2 },
52 { "sslv3", CURL_SSLVERSION_SSLv3 },
53 { "tlsv1", CURL_SSLVERSION_TLSv1 },
54#if LIBCURL_VERSION_NUM >= 0x072200
55 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
56 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
57 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
58#endif
59};
60#if LIBCURL_VERSION_NUM >= 0x070903
61static const char *ssl_key;
62#endif
63#if LIBCURL_VERSION_NUM >= 0x070908
64static const char *ssl_capath;
65#endif
66#if LIBCURL_VERSION_NUM >= 0x072c00
67static const char *ssl_pinnedkey;
68#endif
69static const char *ssl_cainfo;
70static long curl_low_speed_limit = -1;
71static long curl_low_speed_time = -1;
72static int curl_ftp_no_epsv;
73static const char *curl_http_proxy;
74static const char *curl_no_proxy;
75static const char *http_proxy_authmethod;
76static struct {
77 const char *name;
78 long curlauth_param;
79} proxy_authmethods[] = {
80 { "basic", CURLAUTH_BASIC },
81 { "digest", CURLAUTH_DIGEST },
82 { "negotiate", CURLAUTH_GSSNEGOTIATE },
83 { "ntlm", CURLAUTH_NTLM },
84#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
85 { "anyauth", CURLAUTH_ANY },
86#endif
87 /*
88 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
89 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
90 * here, too
91 */
92};
93#if LIBCURL_VERSION_NUM >= 0x071600
94static const char *curl_deleg;
95static struct {
96 const char *name;
97 long curl_deleg_param;
98} curl_deleg_levels[] = {
99 { "none", CURLGSSAPI_DELEGATION_NONE },
100 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
101 { "always", CURLGSSAPI_DELEGATION_FLAG },
102};
103#endif
104static struct credential proxy_auth = CREDENTIAL_INIT;
106static const char *curl_proxyuserpwd;
107static const char *curl_cookie_file;
108static int curl_save_cookies;
109struct credential http_auth = CREDENTIAL_INIT;
110static int http_proactive_auth;
111static const char *user_agent;
112static int curl_empty_auth;
113enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
115#if LIBCURL_VERSION_NUM >= 0x071700
117/* Use CURLOPT_KEYPASSWD as is */
118#elif LIBCURL_VERSION_NUM >= 0x070903
119#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
120#else
121#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
122#endif
123static struct credential cert_auth = CREDENTIAL_INIT;
125static int ssl_cert_password_required;
126#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
127static unsigned long http_auth_methods = CURLAUTH_ANY;
128#endif
129static struct curl_slist *pragma_header;
131static struct curl_slist *no_pragma_header;
132static struct curl_slist *extra_http_headers;
133static struct active_request_slot *active_queue_head;
135static char *cached_accept_language;
137size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
139{
140 size_t size = eltsize * nmemb;
141 struct buffer *buffer = buffer_;
142 if (size > buffer->buf.len - buffer->posn)
144 size = buffer->buf.len - buffer->posn;
145 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
146 buffer->posn += size;
147 return size;
149}
150#ifndef NO_CURL_IOCTL
152curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
153{
154 struct buffer *buffer = clientp;
155 switch (cmd) {
157 case CURLIOCMD_NOP:
158 return CURLIOE_OK;
159 case CURLIOCMD_RESTARTREAD:
161 buffer->posn = 0;
162 return CURLIOE_OK;
163 default:
165 return CURLIOE_UNKNOWNCMD;
166 }
167}
168#endif
169size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
171{
172 size_t size = eltsize * nmemb;
173 struct strbuf *buffer = buffer_;
174 strbuf_add(buffer, ptr, size);
176 return size;
177}
178size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
180{
181 return eltsize * nmemb;
182}
183static void closedown_active_slot(struct active_request_slot *slot)
185{
186 active_requests--;
187 slot->in_use = 0;
188}
189static void finish_active_slot(struct active_request_slot *slot)
191{
192 closedown_active_slot(slot);
193 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
194 if (slot->finished != NULL)
196 (*slot->finished) = 1;
197 /* Store slot results so they can be read after the slot is reused */
199 if (slot->results != NULL) {
200 slot->results->curl_result = slot->curl_result;
201 slot->results->http_code = slot->http_code;
202#if LIBCURL_VERSION_NUM >= 0x070a08
203 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
204 &slot->results->auth_avail);
205#else
206 slot->results->auth_avail = 0;
207#endif
208 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
210 &slot->results->http_connectcode);
211 }
212 /* Run callback if appropriate */
214 if (slot->callback_func != NULL)
215 slot->callback_func(slot->callback_data);
216}
217static void xmulti_remove_handle(struct active_request_slot *slot)
219{
220#ifdef USE_CURL_MULTI
221 curl_multi_remove_handle(curlm, slot->curl);
222#endif
223}
224#ifdef USE_CURL_MULTI
226static void process_curl_messages(void)
227{
228 int num_messages;
229 struct active_request_slot *slot;
230 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
231 while (curl_message != NULL) {
233 if (curl_message->msg == CURLMSG_DONE) {
234 int curl_result = curl_message->data.result;
235 slot = active_queue_head;
236 while (slot != NULL &&
237 slot->curl != curl_message->easy_handle)
238 slot = slot->next;
239 if (slot != NULL) {
240 xmulti_remove_handle(slot);
241 slot->curl_result = curl_result;
242 finish_active_slot(slot);
243 } else {
244 fprintf(stderr, "Received DONE message for unknown request!\n");
245 }
246 } else {
247 fprintf(stderr, "Unknown CURL message received: %d\n",
248 (int)curl_message->msg);
249 }
250 curl_message = curl_multi_info_read(curlm, &num_messages);
251 }
252}
253#endif
254static int http_options(const char *var, const char *value, void *cb)
256{
257 if (!strcmp("http.sslverify", var)) {
258 curl_ssl_verify = git_config_bool(var, value);
259 return 0;
260 }
261 if (!strcmp("http.sslcipherlist", var))
262 return git_config_string(&ssl_cipherlist, var, value);
263 if (!strcmp("http.sslversion", var))
264 return git_config_string(&ssl_version, var, value);
265 if (!strcmp("http.sslcert", var))
266 return git_config_string(&ssl_cert, var, value);
267#if LIBCURL_VERSION_NUM >= 0x070903
268 if (!strcmp("http.sslkey", var))
269 return git_config_string(&ssl_key, var, value);
270#endif
271#if LIBCURL_VERSION_NUM >= 0x070908
272 if (!strcmp("http.sslcapath", var))
273 return git_config_pathname(&ssl_capath, var, value);
274#endif
275 if (!strcmp("http.sslcainfo", var))
276 return git_config_pathname(&ssl_cainfo, var, value);
277 if (!strcmp("http.sslcertpasswordprotected", var)) {
278 ssl_cert_password_required = git_config_bool(var, value);
279 return 0;
280 }
281 if (!strcmp("http.ssltry", var)) {
282 curl_ssl_try = git_config_bool(var, value);
283 return 0;
284 }
285 if (!strcmp("http.minsessions", var)) {
286 min_curl_sessions = git_config_int(var, value);
287#ifndef USE_CURL_MULTI
288 if (min_curl_sessions > 1)
289 min_curl_sessions = 1;
290#endif
291 return 0;
292 }
293#ifdef USE_CURL_MULTI
294 if (!strcmp("http.maxrequests", var)) {
295 max_requests = git_config_int(var, value);
296 return 0;
297 }
298#endif
299 if (!strcmp("http.lowspeedlimit", var)) {
300 curl_low_speed_limit = (long)git_config_int(var, value);
301 return 0;
302 }
303 if (!strcmp("http.lowspeedtime", var)) {
304 curl_low_speed_time = (long)git_config_int(var, value);
305 return 0;
306 }
307 if (!strcmp("http.noepsv", var)) {
309 curl_ftp_no_epsv = git_config_bool(var, value);
310 return 0;
311 }
312 if (!strcmp("http.proxy", var))
313 return git_config_string(&curl_http_proxy, var, value);
314 if (!strcmp("http.proxyauthmethod", var))
316 return git_config_string(&http_proxy_authmethod, var, value);
317 if (!strcmp("http.cookiefile", var))
319 return git_config_pathname(&curl_cookie_file, var, value);
320 if (!strcmp("http.savecookies", var)) {
321 curl_save_cookies = git_config_bool(var, value);
322 return 0;
323 }
324 if (!strcmp("http.postbuffer", var)) {
326 http_post_buffer = git_config_int(var, value);
327 if (http_post_buffer < LARGE_PACKET_MAX)
328 http_post_buffer = LARGE_PACKET_MAX;
329 return 0;
330 }
331 if (!strcmp("http.useragent", var))
333 return git_config_string(&user_agent, var, value);
334 if (!strcmp("http.emptyauth", var)) {
336 curl_empty_auth = git_config_bool(var, value);
337 return 0;
338 }
339 if (!strcmp("http.delegation", var)) {
341#if LIBCURL_VERSION_NUM >= 0x071600
342 return git_config_string(&curl_deleg, var, value);
343#else
344 warning(_("Delegation control is not supported with cURL < 7.22.0"));
345 return 0;
346#endif
347 }
348 if (!strcmp("http.pinnedpubkey", var)) {
350#if LIBCURL_VERSION_NUM >= 0x072c00
351 return git_config_pathname(&ssl_pinnedkey, var, value);
352#else
353 warning(_("Public key pinning not supported with cURL < 7.44.0"));
354 return 0;
355#endif
356 }
357 if (!strcmp("http.extraheader", var)) {
359 if (!value) {
360 return config_error_nonbool(var);
361 } else if (!*value) {
362 curl_slist_free_all(extra_http_headers);
363 extra_http_headers = NULL;
364 } else {
365 extra_http_headers =
366 curl_slist_append(extra_http_headers, value);
367 }
368 return 0;
369 }
370 if (!strcmp("http.followredirects", var)) {
372 if (value && !strcmp(value, "initial"))
373 http_follow_config = HTTP_FOLLOW_INITIAL;
374 else if (git_config_bool(var, value))
375 http_follow_config = HTTP_FOLLOW_ALWAYS;
376 else
377 http_follow_config = HTTP_FOLLOW_NONE;
378 return 0;
379 }
380 /* Fall back on the default ones */
382 return git_default_config(var, value, cb);
383}
384static void init_curl_http_auth(CURL *result)
386{
387 if (!http_auth.username || !*http_auth.username) {
388 if (curl_empty_auth)
389 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
390 return;
391 }
392 credential_fill(&http_auth);
394#if LIBCURL_VERSION_NUM >= 0x071301
396 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
397 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
398#else
399 {
400 static struct strbuf up = STRBUF_INIT;
401 /*
402 * Note that we assume we only ever have a single set of
403 * credentials in a given program run, so we do not have
404 * to worry about updating this buffer, only setting its
405 * initial value.
406 */
407 if (!up.len)
408 strbuf_addf(&up, "%s:%s",
409 http_auth.username, http_auth.password);
410 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
411 }
412#endif
413}
414/* *var must be free-able */
416static void var_override(const char **var, char *value)
417{
418 if (value) {
419 free((void *)*var);
420 *var = xstrdup(value);
421 }
422}
423static void set_proxyauth_name_password(CURL *result)
425{
426#if LIBCURL_VERSION_NUM >= 0x071301
427 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
428 proxy_auth.username);
429 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
430 proxy_auth.password);
431#else
432 struct strbuf s = STRBUF_INIT;
433 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
435 strbuf_addch(&s, ':');
436 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
437 curl_proxyuserpwd = strbuf_detach(&s, NULL);
438 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
439#endif
440}
441static void init_curl_proxy_auth(CURL *result)
443{
444 if (proxy_auth.username) {
445 if (!proxy_auth.password)
446 credential_fill(&proxy_auth);
447 set_proxyauth_name_password(result);
448 }
449 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
451#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
453 if (http_proxy_authmethod) {
454 int i;
455 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
456 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
457 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
458 proxy_authmethods[i].curlauth_param);
459 break;
460 }
461 }
462 if (i == ARRAY_SIZE(proxy_authmethods)) {
463 warning("unsupported proxy authentication method %s: using anyauth",
464 http_proxy_authmethod);
465 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
466 }
467 }
468 else
469 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
470#endif
471}
472static int has_cert_password(void)
474{
475 if (ssl_cert == NULL || ssl_cert_password_required != 1)
476 return 0;
477 if (!cert_auth.password) {
478 cert_auth.protocol = xstrdup("cert");
479 cert_auth.username = xstrdup("");
480 cert_auth.path = xstrdup(ssl_cert);
481 credential_fill(&cert_auth);
482 }
483 return 1;
484}
485#if LIBCURL_VERSION_NUM >= 0x071900
487static void set_curl_keepalive(CURL *c)
488{
489 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
490}
491#elif LIBCURL_VERSION_NUM >= 0x071000
493static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
494{
495 int ka = 1;
496 int rc;
497 socklen_t len = (socklen_t)sizeof(ka);
498 if (type != CURLSOCKTYPE_IPCXN)
500 return 0;
501 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
503 if (rc < 0)
504 warning_errno("unable to set SO_KEEPALIVE on socket");
505 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
507}
508static void set_curl_keepalive(CURL *c)
510{
511 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
512}
513#else
515static void set_curl_keepalive(CURL *c)
516{
517 /* not supported on older curl versions */
518}
519#endif
520static void redact_sensitive_header(struct strbuf *header)
522{
523 const char *sensitive_header;
524 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
526 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
527 /* The first token is the type, which is OK to log */
528 while (isspace(*sensitive_header))
529 sensitive_header++;
530 while (*sensitive_header && !isspace(*sensitive_header))
531 sensitive_header++;
532 /* Everything else is opaque and possibly sensitive */
533 strbuf_setlen(header, sensitive_header - header->buf);
534 strbuf_addstr(header, " <redacted>");
535 }
536}
537static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
539{
540 struct strbuf out = STRBUF_INIT;
541 struct strbuf **headers, **header;
542 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
544 text, (long)size, (long)size);
545 trace_strbuf(&trace_curl, &out);
546 strbuf_reset(&out);
547 strbuf_add(&out, ptr, size);
548 headers = strbuf_split_max(&out, '\n', 0);
549 for (header = headers; *header; header++) {
551 if (hide_sensitive_header)
552 redact_sensitive_header(*header);
553 strbuf_insert((*header), 0, text, strlen(text));
554 strbuf_insert((*header), strlen(text), ": ", 2);
555 strbuf_rtrim((*header));
556 strbuf_addch((*header), '\n');
557 trace_strbuf(&trace_curl, (*header));
558 }
559 strbuf_list_free(headers);
560 strbuf_release(&out);
561}
562static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
564{
565 size_t i;
566 struct strbuf out = STRBUF_INIT;
567 unsigned int width = 60;
568 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
570 text, (long)size, (long)size);
571 trace_strbuf(&trace_curl, &out);
572 for (i = 0; i < size; i += width) {
574 size_t w;
575 strbuf_reset(&out);
577 strbuf_addf(&out, "%s: ", text);
578 for (w = 0; (w < width) && (i + w < size); w++) {
579 unsigned char ch = ptr[i + w];
580 strbuf_addch(&out,
582 (ch >= 0x20) && (ch < 0x80)
583 ? ch : '.');
584 }
585 strbuf_addch(&out, '\n');
586 trace_strbuf(&trace_curl, &out);
587 }
588 strbuf_release(&out);
589}
590static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
592{
593 const char *text;
594 enum { NO_FILTER = 0, DO_FILTER = 1 };
595 switch (type) {
597 case CURLINFO_TEXT:
598 trace_printf_key(&trace_curl, "== Info: %s", data);
599 default: /* we ignore unknown types by default */
600 return 0;
601 case CURLINFO_HEADER_OUT:
603 text = "=> Send header";
604 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
605 break;
606 case CURLINFO_DATA_OUT:
607 text = "=> Send data";
608 curl_dump_data(text, (unsigned char *)data, size);
609 break;
610 case CURLINFO_SSL_DATA_OUT:
611 text = "=> Send SSL data";
612 curl_dump_data(text, (unsigned char *)data, size);
613 break;
614 case CURLINFO_HEADER_IN:
615 text = "<= Recv header";
616 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
617 break;
618 case CURLINFO_DATA_IN:
619 text = "<= Recv data";
620 curl_dump_data(text, (unsigned char *)data, size);
621 break;
622 case CURLINFO_SSL_DATA_IN:
623 text = "<= Recv SSL data";
624 curl_dump_data(text, (unsigned char *)data, size);
625 break;
626 }
627 return 0;
628}
629void setup_curl_trace(CURL *handle)
631{
632 if (!trace_want(&trace_curl))
633 return;
634 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
635 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
636 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
637}
638static CURL *get_curl_handle(void)
641{
642 CURL *result = curl_easy_init();
643 long allowed_protocols = 0;
644 if (!result)
646 die("curl_easy_init failed");
647 if (!curl_ssl_verify) {
649 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
650 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
651 } else {
652 /* Verify authenticity of the peer's certificate */
653 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
654 /* The name in the cert must match whom we tried to connect */
655 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
656 }
657#if LIBCURL_VERSION_NUM >= 0x070907
659 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
660#endif
661#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
662 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
663#endif
664#if LIBCURL_VERSION_NUM >= 0x071600
666 if (curl_deleg) {
667 int i;
668 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
669 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
670 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
671 curl_deleg_levels[i].curl_deleg_param);
672 break;
673 }
674 }
675 if (i == ARRAY_SIZE(curl_deleg_levels))
676 warning("Unknown delegation method '%s': using default",
677 curl_deleg);
678 }
679#endif
680 if (http_proactive_auth)
682 init_curl_http_auth(result);
683 if (getenv("GIT_SSL_VERSION"))
685 ssl_version = getenv("GIT_SSL_VERSION");
686 if (ssl_version && *ssl_version) {
687 int i;
688 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
689 if (!strcmp(ssl_version, sslversions[i].name)) {
690 curl_easy_setopt(result, CURLOPT_SSLVERSION,
691 sslversions[i].ssl_version);
692 break;
693 }
694 }
695 if (i == ARRAY_SIZE(sslversions))
696 warning("unsupported ssl version %s: using default",
697 ssl_version);
698 }
699 if (getenv("GIT_SSL_CIPHER_LIST"))
701 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
702 if (ssl_cipherlist != NULL && *ssl_cipherlist)
703 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
704 ssl_cipherlist);
705 if (ssl_cert != NULL)
707 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
708 if (has_cert_password())
709 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
710#if LIBCURL_VERSION_NUM >= 0x070903
711 if (ssl_key != NULL)
712 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
713#endif
714#if LIBCURL_VERSION_NUM >= 0x070908
715 if (ssl_capath != NULL)
716 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
717#endif
718#if LIBCURL_VERSION_NUM >= 0x072c00
719 if (ssl_pinnedkey != NULL)
720 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
721#endif
722 if (ssl_cainfo != NULL)
723 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
724 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
726 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
727 curl_low_speed_limit);
728 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
729 curl_low_speed_time);
730 }
731 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
733#if LIBCURL_VERSION_NUM >= 0x071301
734 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
735#elif LIBCURL_VERSION_NUM >= 0x071101
736 curl_easy_setopt(result, CURLOPT_POST301, 1);
737#endif
738#if LIBCURL_VERSION_NUM >= 0x071304
739 if (is_transport_allowed("http"))
740 allowed_protocols |= CURLPROTO_HTTP;
741 if (is_transport_allowed("https"))
742 allowed_protocols |= CURLPROTO_HTTPS;
743 if (is_transport_allowed("ftp"))
744 allowed_protocols |= CURLPROTO_FTP;
745 if (is_transport_allowed("ftps"))
746 allowed_protocols |= CURLPROTO_FTPS;
747 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS, allowed_protocols);
748 curl_easy_setopt(result, CURLOPT_PROTOCOLS, allowed_protocols);
749#else
750 if (transport_restrict_protocols())
751 warning("protocol restrictions not applied to curl redirects because\n"
752 "your curl version is too old (>= 7.19.4)");
753#endif
754 if (getenv("GIT_CURL_VERBOSE"))
755 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
756 setup_curl_trace(result);
757 curl_easy_setopt(result, CURLOPT_USERAGENT,
759 user_agent ? user_agent : git_user_agent());
760 if (curl_ftp_no_epsv)
762 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
763#ifdef CURLOPT_USE_SSL
765 if (curl_ssl_try)
766 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
767#endif
768 /*
770 * CURL also examines these variables as a fallback; but we need to query
771 * them here in order to decide whether to prompt for missing password (cf.
772 * init_curl_proxy_auth()).
773 *
774 * Unlike many other common environment variables, these are historically
775 * lowercase only. It appears that CURL did not know this and implemented
776 * only uppercase variants, which was later corrected to take both - with
777 * the exception of http_proxy, which is lowercase only also in CURL. As
778 * the lowercase versions are the historical quasi-standard, they take
779 * precedence here, as in CURL.
780 */
781 if (!curl_http_proxy) {
782 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
783 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
784 var_override(&curl_http_proxy, getenv("https_proxy"));
785 } else {
786 var_override(&curl_http_proxy, getenv("http_proxy"));
787 }
788 if (!curl_http_proxy) {
789 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
790 var_override(&curl_http_proxy, getenv("all_proxy"));
791 }
792 }
793 if (curl_http_proxy) {
795 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
796#if LIBCURL_VERSION_NUM >= 0x071800
797 if (starts_with(curl_http_proxy, "socks5h"))
798 curl_easy_setopt(result,
799 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
800 else if (starts_with(curl_http_proxy, "socks5"))
801 curl_easy_setopt(result,
802 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
803 else if (starts_with(curl_http_proxy, "socks4a"))
804 curl_easy_setopt(result,
805 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
806 else if (starts_with(curl_http_proxy, "socks"))
807 curl_easy_setopt(result,
808 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
809#endif
810 if (strstr(curl_http_proxy, "://"))
811 credential_from_url(&proxy_auth, curl_http_proxy);
812 else {
813 struct strbuf url = STRBUF_INIT;
814 strbuf_addf(&url, "http://%s", curl_http_proxy);
815 credential_from_url(&proxy_auth, url.buf);
816 strbuf_release(&url);
817 }
818 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
820#if LIBCURL_VERSION_NUM >= 0x071304
821 var_override(&curl_no_proxy, getenv("NO_PROXY"));
822 var_override(&curl_no_proxy, getenv("no_proxy"));
823 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
824#endif
825 }
826 init_curl_proxy_auth(result);
827 set_curl_keepalive(result);
829 return result;
831}
832static void set_from_env(const char **var, const char *envname)
834{
835 const char *val = getenv(envname);
836 if (val)
837 *var = val;
838}
839void http_init(struct remote *remote, const char *url, int proactive_auth)
841{
842 char *low_speed_limit;
843 char *low_speed_time;
844 char *normalized_url;
845 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
846 config.section = "http";
848 config.key = NULL;
849 config.collect_fn = http_options;
850 config.cascade_fn = git_default_config;
851 config.cb = NULL;
852 http_is_verbose = 0;
854 normalized_url = url_normalize(url, &config.url);
855 git_config(urlmatch_config_entry, &config);
857 free(normalized_url);
858 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
860 die("curl_global_init failed");
861 http_proactive_auth = proactive_auth;
863 if (remote && remote->http_proxy)
865 curl_http_proxy = xstrdup(remote->http_proxy);
866 if (remote)
868 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
869 pragma_header = curl_slist_append(http_copy_default_headers(),
871 "Pragma: no-cache");
872 no_pragma_header = curl_slist_append(http_copy_default_headers(),
873 "Pragma:");
874#ifdef USE_CURL_MULTI
876 {
877 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
878 if (http_max_requests != NULL)
879 max_requests = atoi(http_max_requests);
880 }
881 curlm = curl_multi_init();
883 if (!curlm)
884 die("curl_multi_init failed");
885#endif
886 if (getenv("GIT_SSL_NO_VERIFY"))
888 curl_ssl_verify = 0;
889 set_from_env(&ssl_cert, "GIT_SSL_CERT");
891#if LIBCURL_VERSION_NUM >= 0x070903
892 set_from_env(&ssl_key, "GIT_SSL_KEY");
893#endif
894#if LIBCURL_VERSION_NUM >= 0x070908
895 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
896#endif
897 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
898 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
900 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
902 if (low_speed_limit != NULL)
903 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
904 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
905 if (low_speed_time != NULL)
906 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
907 if (curl_ssl_verify == -1)
909 curl_ssl_verify = 1;
910 curl_session_count = 0;
912#ifdef USE_CURL_MULTI
913 if (max_requests < 1)
914 max_requests = DEFAULT_MAX_REQUESTS;
915#endif
916 if (getenv("GIT_CURL_FTP_NO_EPSV"))
918 curl_ftp_no_epsv = 1;
919 if (url) {
921 credential_from_url(&http_auth, url);
922 if (!ssl_cert_password_required &&
923 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
924 starts_with(url, "https://"))
925 ssl_cert_password_required = 1;
926 }
927#ifndef NO_CURL_EASY_DUPHANDLE
929 curl_default = get_curl_handle();
930#endif
931}
932void http_cleanup(void)
934{
935 struct active_request_slot *slot = active_queue_head;
936 while (slot != NULL) {
938 struct active_request_slot *next = slot->next;
939 if (slot->curl != NULL) {
940 xmulti_remove_handle(slot);
941 curl_easy_cleanup(slot->curl);
942 }
943 free(slot);
944 slot = next;
945 }
946 active_queue_head = NULL;
947#ifndef NO_CURL_EASY_DUPHANDLE
949 curl_easy_cleanup(curl_default);
950#endif
951#ifdef USE_CURL_MULTI
953 curl_multi_cleanup(curlm);
954#endif
955 curl_global_cleanup();
956 curl_slist_free_all(extra_http_headers);
958 extra_http_headers = NULL;
959 curl_slist_free_all(pragma_header);
961 pragma_header = NULL;
962 curl_slist_free_all(no_pragma_header);
964 no_pragma_header = NULL;
965 if (curl_http_proxy) {
967 free((void *)curl_http_proxy);
968 curl_http_proxy = NULL;
969 }
970 if (proxy_auth.password) {
972 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
973 free(proxy_auth.password);
974 proxy_auth.password = NULL;
975 }
976 free((void *)curl_proxyuserpwd);
978 curl_proxyuserpwd = NULL;
979 free((void *)http_proxy_authmethod);
981 http_proxy_authmethod = NULL;
982 if (cert_auth.password != NULL) {
984 memset(cert_auth.password, 0, strlen(cert_auth.password));
985 free(cert_auth.password);
986 cert_auth.password = NULL;
987 }
988 ssl_cert_password_required = 0;
989 free(cached_accept_language);
991 cached_accept_language = NULL;
992}
993struct active_request_slot *get_active_slot(void)
995{
996 struct active_request_slot *slot = active_queue_head;
997 struct active_request_slot *newslot;
998#ifdef USE_CURL_MULTI
1000 int num_transfers;
1001 /* Wait for a slot to open up if the queue is full */
1003 while (active_requests >= max_requests) {
1004 curl_multi_perform(curlm, &num_transfers);
1005 if (num_transfers < active_requests)
1006 process_curl_messages();
1007 }
1008#endif
1009 while (slot != NULL && slot->in_use)
1011 slot = slot->next;
1012 if (slot == NULL) {
1014 newslot = xmalloc(sizeof(*newslot));
1015 newslot->curl = NULL;
1016 newslot->in_use = 0;
1017 newslot->next = NULL;
1018 slot = active_queue_head;
1020 if (slot == NULL) {
1021 active_queue_head = newslot;
1022 } else {
1023 while (slot->next != NULL)
1024 slot = slot->next;
1025 slot->next = newslot;
1026 }
1027 slot = newslot;
1028 }
1029 if (slot->curl == NULL) {
1031#ifdef NO_CURL_EASY_DUPHANDLE
1032 slot->curl = get_curl_handle();
1033#else
1034 slot->curl = curl_easy_duphandle(curl_default);
1035#endif
1036 curl_session_count++;
1037 }
1038 active_requests++;
1040 slot->in_use = 1;
1041 slot->results = NULL;
1042 slot->finished = NULL;
1043 slot->callback_data = NULL;
1044 slot->callback_func = NULL;
1045 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1046 if (curl_save_cookies)
1047 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1048 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1049 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1050 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1051 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1052 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1053 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1054 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1055 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1056 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1057 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1058 /*
1060 * Default following to off unless "ALWAYS" is configured; this gives
1061 * callers a sane starting point, and they can tweak for individual
1062 * HTTP_FOLLOW_* cases themselves.
1063 */
1064 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1065 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1066 else
1067 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1068#if LIBCURL_VERSION_NUM >= 0x070a08
1070 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1071#endif
1072#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1073 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1074#endif
1075 if (http_auth.password || curl_empty_auth)
1076 init_curl_http_auth(slot->curl);
1077 return slot;
1079}
1080int start_active_slot(struct active_request_slot *slot)
1082{
1083#ifdef USE_CURL_MULTI
1084 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1085 int num_transfers;
1086 if (curlm_result != CURLM_OK &&
1088 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1089 warning("curl_multi_add_handle failed: %s",
1090 curl_multi_strerror(curlm_result));
1091 active_requests--;
1092 slot->in_use = 0;
1093 return 0;
1094 }
1095 /*
1097 * We know there must be something to do, since we just added
1098 * something.
1099 */
1100 curl_multi_perform(curlm, &num_transfers);
1101#endif
1102 return 1;
1103}
1104#ifdef USE_CURL_MULTI
1106struct fill_chain {
1107 void *data;
1108 int (*fill)(void *);
1109 struct fill_chain *next;
1110};
1111static struct fill_chain *fill_cfg;
1113void add_fill_function(void *data, int (*fill)(void *))
1115{
1116 struct fill_chain *new = xmalloc(sizeof(*new));
1117 struct fill_chain **linkp = &fill_cfg;
1118 new->data = data;
1119 new->fill = fill;
1120 new->next = NULL;
1121 while (*linkp)
1122 linkp = &(*linkp)->next;
1123 *linkp = new;
1124}
1125void fill_active_slots(void)
1127{
1128 struct active_request_slot *slot = active_queue_head;
1129 while (active_requests < max_requests) {
1131 struct fill_chain *fill;
1132 for (fill = fill_cfg; fill; fill = fill->next)
1133 if (fill->fill(fill->data))
1134 break;
1135 if (!fill)
1137 break;
1138 }
1139 while (slot != NULL) {
1141 if (!slot->in_use && slot->curl != NULL
1142 && curl_session_count > min_curl_sessions) {
1143 curl_easy_cleanup(slot->curl);
1144 slot->curl = NULL;
1145 curl_session_count--;
1146 }
1147 slot = slot->next;
1148 }
1149}
1150void step_active_slots(void)
1152{
1153 int num_transfers;
1154 CURLMcode curlm_result;
1155 do {
1157 curlm_result = curl_multi_perform(curlm, &num_transfers);
1158 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1159 if (num_transfers < active_requests) {
1160 process_curl_messages();
1161 fill_active_slots();
1162 }
1163}
1164#endif
1165void run_active_slot(struct active_request_slot *slot)
1167{
1168#ifdef USE_CURL_MULTI
1169 fd_set readfds;
1170 fd_set writefds;
1171 fd_set excfds;
1172 int max_fd;
1173 struct timeval select_timeout;
1174 int finished = 0;
1175 slot->finished = &finished;
1177 while (!finished) {
1178 step_active_slots();
1179 if (slot->in_use) {
1181#if LIBCURL_VERSION_NUM >= 0x070f04
1182 long curl_timeout;
1183 curl_multi_timeout(curlm, &curl_timeout);
1184 if (curl_timeout == 0) {
1185 continue;
1186 } else if (curl_timeout == -1) {
1187 select_timeout.tv_sec = 0;
1188 select_timeout.tv_usec = 50000;
1189 } else {
1190 select_timeout.tv_sec = curl_timeout / 1000;
1191 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1192 }
1193#else
1194 select_timeout.tv_sec = 0;
1195 select_timeout.tv_usec = 50000;
1196#endif
1197 max_fd = -1;
1199 FD_ZERO(&readfds);
1200 FD_ZERO(&writefds);
1201 FD_ZERO(&excfds);
1202 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1203 /*
1205 * It can happen that curl_multi_timeout returns a pathologically
1206 * long timeout when curl_multi_fdset returns no file descriptors
1207 * to read. See commit message for more details.
1208 */
1209 if (max_fd < 0 &&
1210 (select_timeout.tv_sec > 0 ||
1211 select_timeout.tv_usec > 50000)) {
1212 select_timeout.tv_sec = 0;
1213 select_timeout.tv_usec = 50000;
1214 }
1215 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1217 }
1218 }
1219#else
1220 while (slot->in_use) {
1221 slot->curl_result = curl_easy_perform(slot->curl);
1222 finish_active_slot(slot);
1223 }
1224#endif
1225}
1226static void release_active_slot(struct active_request_slot *slot)
1228{
1229 closedown_active_slot(slot);
1230 if (slot->curl) {
1231 xmulti_remove_handle(slot);
1232 if (curl_session_count > min_curl_sessions) {
1233 curl_easy_cleanup(slot->curl);
1234 slot->curl = NULL;
1235 curl_session_count--;
1236 }
1237 }
1238#ifdef USE_CURL_MULTI
1239 fill_active_slots();
1240#endif
1241}
1242void finish_all_active_slots(void)
1244{
1245 struct active_request_slot *slot = active_queue_head;
1246 while (slot != NULL)
1248 if (slot->in_use) {
1249 run_active_slot(slot);
1250 slot = active_queue_head;
1251 } else {
1252 slot = slot->next;
1253 }
1254}
1255/* Helpers for modifying and creating URLs */
1257static inline int needs_quote(int ch)
1258{
1259 if (((ch >= 'A') && (ch <= 'Z'))
1260 || ((ch >= 'a') && (ch <= 'z'))
1261 || ((ch >= '0') && (ch <= '9'))
1262 || (ch == '/')
1263 || (ch == '-')
1264 || (ch == '.'))
1265 return 0;
1266 return 1;
1267}
1268static char *quote_ref_url(const char *base, const char *ref)
1270{
1271 struct strbuf buf = STRBUF_INIT;
1272 const char *cp;
1273 int ch;
1274 end_url_with_slash(&buf, base);
1276 for (cp = ref; (ch = *cp) != 0; cp++)
1278 if (needs_quote(ch))
1279 strbuf_addf(&buf, "%%%02x", ch);
1280 else
1281 strbuf_addch(&buf, *cp);
1282 return strbuf_detach(&buf, NULL);
1284}
1285void append_remote_object_url(struct strbuf *buf, const char *url,
1287 const char *hex,
1288 int only_two_digit_prefix)
1289{
1290 end_url_with_slash(buf, url);
1291 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1293 if (!only_two_digit_prefix)
1294 strbuf_addstr(buf, hex + 2);
1295}
1296char *get_remote_object_url(const char *url, const char *hex,
1298 int only_two_digit_prefix)
1299{
1300 struct strbuf buf = STRBUF_INIT;
1301 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1302 return strbuf_detach(&buf, NULL);
1303}
1304static int handle_curl_result(struct slot_results *results)
1306{
1307 /*
1308 * If we see a failing http code with CURLE_OK, we have turned off
1309 * FAILONERROR (to keep the server's custom error response), and should
1310 * translate the code into failure here.
1311 *
1312 * Likewise, if we see a redirect (30x code), that means we turned off
1313 * redirect-following, and we should treat the result as an error.
1314 */
1315 if (results->curl_result == CURLE_OK &&
1316 results->http_code >= 300) {
1317 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1318 /*
1319 * Normally curl will already have put the "reason phrase"
1320 * from the server into curl_errorstr; unfortunately without
1321 * FAILONERROR it is lost, so we can give only the numeric
1322 * status code.
1323 */
1324 snprintf(curl_errorstr, sizeof(curl_errorstr),
1325 "The requested URL returned error: %ld",
1326 results->http_code);
1327 }
1328 if (results->curl_result == CURLE_OK) {
1330 credential_approve(&http_auth);
1331 if (proxy_auth.password)
1332 credential_approve(&proxy_auth);
1333 return HTTP_OK;
1334 } else if (missing_target(results))
1335 return HTTP_MISSING_TARGET;
1336 else if (results->http_code == 401) {
1337 if (http_auth.username && http_auth.password) {
1338 credential_reject(&http_auth);
1339 return HTTP_NOAUTH;
1340 } else {
1341#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1342 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1343 if (results->auth_avail)
1344 http_auth_methods &= results->auth_avail;
1345#endif
1346 return HTTP_REAUTH;
1347 }
1348 } else {
1349 if (results->http_connectcode == 407)
1350 credential_reject(&proxy_auth);
1351#if LIBCURL_VERSION_NUM >= 0x070c00
1352 if (!curl_errorstr[0])
1353 strlcpy(curl_errorstr,
1354 curl_easy_strerror(results->curl_result),
1355 sizeof(curl_errorstr));
1356#endif
1357 return HTTP_ERROR;
1358 }
1359}
1360int run_one_slot(struct active_request_slot *slot,
1362 struct slot_results *results)
1363{
1364 slot->results = results;
1365 if (!start_active_slot(slot)) {
1366 snprintf(curl_errorstr, sizeof(curl_errorstr),
1367 "failed to start HTTP request");
1368 return HTTP_START_FAILED;
1369 }
1370 run_active_slot(slot);
1372 return handle_curl_result(results);
1373}
1374struct curl_slist *http_copy_default_headers(void)
1376{
1377 struct curl_slist *headers = NULL, *h;
1378 for (h = extra_http_headers; h; h = h->next)
1380 headers = curl_slist_append(headers, h->data);
1381 return headers;
1383}
1384static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1386{
1387 char *ptr;
1388 CURLcode ret;
1389 strbuf_reset(buf);
1391 ret = curl_easy_getinfo(curl, info, &ptr);
1392 if (!ret && ptr)
1393 strbuf_addstr(buf, ptr);
1394 return ret;
1395}
1396/*
1398 * Check for and extract a content-type parameter. "raw"
1399 * should be positioned at the start of the potential
1400 * parameter, with any whitespace already removed.
1401 *
1402 * "name" is the name of the parameter. The value is appended
1403 * to "out".
1404 */
1405static int extract_param(const char *raw, const char *name,
1406 struct strbuf *out)
1407{
1408 size_t len = strlen(name);
1409 if (strncasecmp(raw, name, len))
1411 return -1;
1412 raw += len;
1413 if (*raw != '=')
1415 return -1;
1416 raw++;
1417 while (*raw && !isspace(*raw) && *raw != ';')
1419 strbuf_addch(out, *raw++);
1420 return 0;
1421}
1422/*
1424 * Extract a normalized version of the content type, with any
1425 * spaces suppressed, all letters lowercased, and no trailing ";"
1426 * or parameters.
1427 *
1428 * Note that we will silently remove even invalid whitespace. For
1429 * example, "text / plain" is specifically forbidden by RFC 2616,
1430 * but "text/plain" is the only reasonable output, and this keeps
1431 * our code simple.
1432 *
1433 * If the "charset" argument is not NULL, store the value of any
1434 * charset parameter there.
1435 *
1436 * Example:
1437 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1438 * "text / plain" -> "text/plain"
1439 */
1440static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1441 struct strbuf *charset)
1442{
1443 const char *p;
1444 strbuf_reset(type);
1446 strbuf_grow(type, raw->len);
1447 for (p = raw->buf; *p; p++) {
1448 if (isspace(*p))
1449 continue;
1450 if (*p == ';') {
1451 p++;
1452 break;
1453 }
1454 strbuf_addch(type, tolower(*p));
1455 }
1456 if (!charset)
1458 return;
1459 strbuf_reset(charset);
1461 while (*p) {
1462 while (isspace(*p) || *p == ';')
1463 p++;
1464 if (!extract_param(p, "charset", charset))
1465 return;
1466 while (*p && !isspace(*p))
1467 p++;
1468 }
1469 if (!charset->len && starts_with(type->buf, "text/"))
1471 strbuf_addstr(charset, "ISO-8859-1");
1472}
1473static void write_accept_language(struct strbuf *buf)
1475{
1476 /*
1477 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1478 * that, q-value will be smaller than 0.001, the minimum q-value the
1479 * HTTP specification allows. See
1480 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1481 */
1482 const int MAX_DECIMAL_PLACES = 3;
1483 const int MAX_LANGUAGE_TAGS = 1000;
1484 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1485 char **language_tags = NULL;
1486 int num_langs = 0;
1487 const char *s = get_preferred_languages();
1488 int i;
1489 struct strbuf tag = STRBUF_INIT;
1490 /* Don't add Accept-Language header if no language is preferred. */
1492 if (!s)
1493 return;
1494 /*
1496 * Split the colon-separated string of preferred languages into
1497 * language_tags array.
1498 */
1499 do {
1500 /* collect language tag */
1501 for (; *s && (isalnum(*s) || *s == '_'); s++)
1502 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1503 /* skip .codeset, @modifier and any other unnecessary parts */
1505 while (*s && *s != ':')
1506 s++;
1507 if (tag.len) {
1509 num_langs++;
1510 REALLOC_ARRAY(language_tags, num_langs);
1511 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1512 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1513 break;
1514 }
1515 } while (*s++);
1516 /* write Accept-Language header into buf */
1518 if (num_langs) {
1519 int last_buf_len = 0;
1520 int max_q;
1521 int decimal_places;
1522 char q_format[32];
1523 /* add '*' */
1525 REALLOC_ARRAY(language_tags, num_langs + 1);
1526 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1527 /* compute decimal_places */
1529 for (max_q = 1, decimal_places = 0;
1530 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1531 decimal_places++, max_q *= 10)
1532 ;
1533 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1535 strbuf_addstr(buf, "Accept-Language: ");
1537 for (i = 0; i < num_langs; i++) {
1539 if (i > 0)
1540 strbuf_addstr(buf, ", ");
1541 strbuf_addstr(buf, language_tags[i]);
1543 if (i > 0)
1545 strbuf_addf(buf, q_format, max_q - i);
1546 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1548 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1549 break;
1550 }
1551 last_buf_len = buf->len;
1553 }
1554 }
1555 /* free language tags -- last one is a static '*' */
1557 for (i = 0; i < num_langs - 1; i++)
1558 free(language_tags[i]);
1559 free(language_tags);
1560}
1561/*
1563 * Get an Accept-Language header which indicates user's preferred languages.
1564 *
1565 * Examples:
1566 * LANGUAGE= -> ""
1567 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1568 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1569 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1570 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1571 * LANGUAGE= LANG=C -> ""
1572 */
1573static const char *get_accept_language(void)
1574{
1575 if (!cached_accept_language) {
1576 struct strbuf buf = STRBUF_INIT;
1577 write_accept_language(&buf);
1578 if (buf.len > 0)
1579 cached_accept_language = strbuf_detach(&buf, NULL);
1580 }
1581 return cached_accept_language;
1583}
1584static void http_opt_request_remainder(CURL *curl, off_t pos)
1586{
1587 char buf[128];
1588 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1589 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1590}
1591/* http_request() targets */
1593#define HTTP_REQUEST_STRBUF 0
1594#define HTTP_REQUEST_FILE 1
1595static int http_request(const char *url,
1597 void *result, int target,
1598 const struct http_get_options *options)
1599{
1600 struct active_request_slot *slot;
1601 struct slot_results results;
1602 struct curl_slist *headers = http_copy_default_headers();
1603 struct strbuf buf = STRBUF_INIT;
1604 const char *accept_language;
1605 int ret;
1606 slot = get_active_slot();
1608 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1609 if (result == NULL) {
1611 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1612 } else {
1613 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1614 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1615 if (target == HTTP_REQUEST_FILE) {
1617 off_t posn = ftello(result);
1618 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1619 fwrite);
1620 if (posn > 0)
1621 http_opt_request_remainder(slot->curl, posn);
1622 } else
1623 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1624 fwrite_buffer);
1625 }
1626 accept_language = get_accept_language();
1628 if (accept_language)
1630 headers = curl_slist_append(headers, accept_language);
1631 strbuf_addstr(&buf, "Pragma:");
1633 if (options && options->no_cache)
1634 strbuf_addstr(&buf, " no-cache");
1635 if (options && options->keep_error)
1636 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1637 if (options && options->initial_request &&
1638 http_follow_config == HTTP_FOLLOW_INITIAL)
1639 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1640 headers = curl_slist_append(headers, buf.buf);
1642 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1644 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1645 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1646 ret = run_one_slot(slot, &results);
1648 if (options && options->content_type) {
1650 struct strbuf raw = STRBUF_INIT;
1651 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1652 extract_content_type(&raw, options->content_type,
1653 options->charset);
1654 strbuf_release(&raw);
1655 }
1656 if (options && options->effective_url)
1658 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1659 options->effective_url);
1660 curl_slist_free_all(headers);
1662 strbuf_release(&buf);
1663 return ret;
1665}
1666/*
1668 * Update the "base" url to a more appropriate value, as deduced by
1669 * redirects seen when requesting a URL starting with "url".
1670 *
1671 * The "asked" parameter is a URL that we asked curl to access, and must begin
1672 * with "base".
1673 *
1674 * The "got" parameter is the URL that curl reported to us as where we ended
1675 * up.
1676 *
1677 * Returns 1 if we updated the base url, 0 otherwise.
1678 *
1679 * Our basic strategy is to compare "base" and "asked" to find the bits
1680 * specific to our request. We then strip those bits off of "got" to yield the
1681 * new base. So for example, if our base is "http://example.com/foo.git",
1682 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1683 * with "https://other.example.com/foo.git/info/refs". We would want the
1684 * new URL to become "https://other.example.com/foo.git".
1685 *
1686 * Note that this assumes a sane redirect scheme. It's entirely possible
1687 * in the example above to end up at a URL that does not even end in
1688 * "info/refs". In such a case we die. There's not much we can do, such a
1689 * scheme is unlikely to represent a real git repository, and failing to
1690 * rewrite the base opens options for malicious redirects to do funny things.
1691 */
1692static int update_url_from_redirect(struct strbuf *base,
1693 const char *asked,
1694 const struct strbuf *got)
1695{
1696 const char *tail;
1697 size_t new_len;
1698 if (!strcmp(asked, got->buf))
1700 return 0;
1701 if (!skip_prefix(asked, base->buf, &tail))
1703 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1704 asked, base->buf);
1705 new_len = got->len;
1707 if (!strip_suffix_mem(got->buf, &new_len, tail))
1708 die(_("unable to update url base from redirection:\n"
1709 " asked for: %s\n"
1710 " redirect: %s"),
1711 asked, got->buf);
1712 strbuf_reset(base);
1714 strbuf_add(base, got->buf, new_len);
1715 return 1;
1717}
1718static int http_request_reauth(const char *url,
1720 void *result, int target,
1721 struct http_get_options *options)
1722{
1723 int ret = http_request(url, result, target, options);
1724 if (options && options->effective_url && options->base_url) {
1726 if (update_url_from_redirect(options->base_url,
1727 url, options->effective_url)) {
1728 credential_from_url(&http_auth, options->base_url->buf);
1729 url = options->effective_url->buf;
1730 }
1731 }
1732 if (ret != HTTP_REAUTH)
1734 return ret;
1735 /*
1737 * If we are using KEEP_ERROR, the previous request may have
1738 * put cruft into our output stream; we should clear it out before
1739 * making our next request. We only know how to do this for
1740 * the strbuf case, but that is enough to satisfy current callers.
1741 */
1742 if (options && options->keep_error) {
1743 switch (target) {
1744 case HTTP_REQUEST_STRBUF:
1745 strbuf_reset(result);
1746 break;
1747 default:
1748 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1749 }
1750 }
1751 credential_fill(&http_auth);
1753 return http_request(url, result, target, options);
1755}
1756int http_get_strbuf(const char *url,
1758 struct strbuf *result,
1759 struct http_get_options *options)
1760{
1761 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1762}
1763/*
1765 * Downloads a URL and stores the result in the given file.
1766 *
1767 * If a previous interrupted download is detected (i.e. a previous temporary
1768 * file is still around) the download is resumed.
1769 */
1770static int http_get_file(const char *url, const char *filename,
1771 struct http_get_options *options)
1772{
1773 int ret;
1774 struct strbuf tmpfile = STRBUF_INIT;
1775 FILE *result;
1776 strbuf_addf(&tmpfile, "%s.temp", filename);
1778 result = fopen(tmpfile.buf, "a");
1779 if (!result) {
1780 error("Unable to open local file %s", tmpfile.buf);
1781 ret = HTTP_ERROR;
1782 goto cleanup;
1783 }
1784 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1786 fclose(result);
1787 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1789 ret = HTTP_ERROR;
1790cleanup:
1791 strbuf_release(&tmpfile);
1792 return ret;
1793}
1794int http_fetch_ref(const char *base, struct ref *ref)
1796{
1797 struct http_get_options options = {0};
1798 char *url;
1799 struct strbuf buffer = STRBUF_INIT;
1800 int ret = -1;
1801 options.no_cache = 1;
1803 url = quote_ref_url(base, ref->name);
1805 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1806 strbuf_rtrim(&buffer);
1807 if (buffer.len == 40)
1808 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1809 else if (starts_with(buffer.buf, "ref: ")) {
1810 ref->symref = xstrdup(buffer.buf + 5);
1811 ret = 0;
1812 }
1813 }
1814 strbuf_release(&buffer);
1816 free(url);
1817 return ret;
1818}
1819/* Helpers for fetching packs */
1821static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1822{
1823 char *url, *tmp;
1824 struct strbuf buf = STRBUF_INIT;
1825 if (http_is_verbose)
1827 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1828 end_url_with_slash(&buf, base_url);
1830 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1831 url = strbuf_detach(&buf, NULL);
1832 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1834 tmp = strbuf_detach(&buf, NULL);
1835 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1837 error("Unable to get pack index %s", url);
1838 free(tmp);
1839 tmp = NULL;
1840 }
1841 free(url);
1843 return tmp;
1844}
1845static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1847 unsigned char *sha1, const char *base_url)
1848{
1849 struct packed_git *new_pack;
1850 char *tmp_idx = NULL;
1851 int ret;
1852 if (has_pack_index(sha1)) {
1854 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1855 if (!new_pack)
1856 return -1; /* parse_pack_index() already issued error message */
1857 goto add_pack;
1858 }
1859 tmp_idx = fetch_pack_index(sha1, base_url);
1861 if (!tmp_idx)
1862 return -1;
1863 new_pack = parse_pack_index(sha1, tmp_idx);
1865 if (!new_pack) {
1866 unlink(tmp_idx);
1867 free(tmp_idx);
1868 return -1; /* parse_pack_index() already issued error message */
1870 }
1871 ret = verify_pack_index(new_pack);
1873 if (!ret) {
1874 close_pack_index(new_pack);
1875 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1876 }
1877 free(tmp_idx);
1878 if (ret)
1879 return -1;
1880add_pack:
1882 new_pack->next = *packs_head;
1883 *packs_head = new_pack;
1884 return 0;
1885}
1886int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1888{
1889 struct http_get_options options = {0};
1890 int ret = 0, i = 0;
1891 char *url, *data;
1892 struct strbuf buf = STRBUF_INIT;
1893 unsigned char sha1[20];
1894 end_url_with_slash(&buf, base_url);
1896 strbuf_addstr(&buf, "objects/info/packs");
1897 url = strbuf_detach(&buf, NULL);
1898 options.no_cache = 1;
1900 ret = http_get_strbuf(url, &buf, &options);
1901 if (ret != HTTP_OK)
1902 goto cleanup;
1903 data = buf.buf;
1905 while (i < buf.len) {
1906 switch (data[i]) {
1907 case 'P':
1908 i++;
1909 if (i + 52 <= buf.len &&
1910 starts_with(data + i, " pack-") &&
1911 starts_with(data + i + 46, ".pack\n")) {
1912 get_sha1_hex(data + i + 6, sha1);
1913 fetch_and_setup_pack_index(packs_head, sha1,
1914 base_url);
1915 i += 51;
1916 break;
1917 }
1918 default:
1919 while (i < buf.len && data[i] != '\n')
1920 i++;
1921 }
1922 i++;
1923 }
1924cleanup:
1926 free(url);
1927 return ret;
1928}
1929void release_http_pack_request(struct http_pack_request *preq)
1931{
1932 if (preq->packfile != NULL) {
1933 fclose(preq->packfile);
1934 preq->packfile = NULL;
1935 }
1936 preq->slot = NULL;
1937 free(preq->url);
1938 free(preq);
1939}
1940int finish_http_pack_request(struct http_pack_request *preq)
1942{
1943 struct packed_git **lst;
1944 struct packed_git *p = preq->target;
1945 char *tmp_idx;
1946 size_t len;
1947 struct child_process ip = CHILD_PROCESS_INIT;
1948 const char *ip_argv[8];
1949 close_pack_index(p);
1951 fclose(preq->packfile);
1953 preq->packfile = NULL;
1954 lst = preq->lst;
1956 while (*lst != p)
1957 lst = &((*lst)->next);
1958 *lst = (*lst)->next;
1959 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
1961 die("BUG: pack tmpfile does not end in .pack.temp?");
1962 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
1963 ip_argv[0] = "index-pack";
1965 ip_argv[1] = "-o";
1966 ip_argv[2] = tmp_idx;
1967 ip_argv[3] = preq->tmpfile;
1968 ip_argv[4] = NULL;
1969 ip.argv = ip_argv;
1971 ip.git_cmd = 1;
1972 ip.no_stdin = 1;
1973 ip.no_stdout = 1;
1974 if (run_command(&ip)) {
1976 unlink(preq->tmpfile);
1977 unlink(tmp_idx);
1978 free(tmp_idx);
1979 return -1;
1980 }
1981 unlink(sha1_pack_index_name(p->sha1));
1983 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
1985 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1986 free(tmp_idx);
1987 return -1;
1988 }
1989 install_packed_git(p);
1991 free(tmp_idx);
1992 return 0;
1993}
1994struct http_pack_request *new_http_pack_request(
1996 struct packed_git *target, const char *base_url)
1997{
1998 off_t prev_posn = 0;
1999 struct strbuf buf = STRBUF_INIT;
2000 struct http_pack_request *preq;
2001 preq = xcalloc(1, sizeof(*preq));
2003 preq->target = target;
2004 end_url_with_slash(&buf, base_url);
2006 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2007 sha1_to_hex(target->sha1));
2008 preq->url = strbuf_detach(&buf, NULL);
2009 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2011 sha1_pack_name(target->sha1));
2012 preq->packfile = fopen(preq->tmpfile, "a");
2013 if (!preq->packfile) {
2014 error("Unable to open local file %s for pack",
2015 preq->tmpfile);
2016 goto abort;
2017 }
2018 preq->slot = get_active_slot();
2020 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2021 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2022 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2023 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2024 no_pragma_header);
2025 /*
2027 * If there is data present from a previous transfer attempt,
2028 * resume where it left off
2029 */
2030 prev_posn = ftello(preq->packfile);
2031 if (prev_posn>0) {
2032 if (http_is_verbose)
2033 fprintf(stderr,
2034 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2035 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2036 http_opt_request_remainder(preq->slot->curl, prev_posn);
2037 }
2038 return preq;
2040abort:
2042 free(preq->url);
2043 free(preq);
2044 return NULL;
2045}
2046/* Helpers for fetching objects (loose) */
2048static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2049 void *data)
2050{
2051 unsigned char expn[4096];
2052 size_t size = eltsize * nmemb;
2053 int posn = 0;
2054 struct http_object_request *freq = data;
2055 struct active_request_slot *slot = freq->slot;
2056 if (slot) {
2058 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2059 &slot->http_code);
2060 if (c != CURLE_OK)
2061 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2062 curl_easy_strerror(c));
2063 if (slot->http_code >= 300)
2064 return size;
2065 }
2066 do {
2068 ssize_t retval = xwrite(freq->localfile,
2069 (char *) ptr + posn, size - posn);
2070 if (retval < 0)
2071 return posn;
2072 posn += retval;
2073 } while (posn < size);
2074 freq->stream.avail_in = size;
2076 freq->stream.next_in = (void *)ptr;
2077 do {
2078 freq->stream.next_out = expn;
2079 freq->stream.avail_out = sizeof(expn);
2080 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2081 git_SHA1_Update(&freq->c, expn,
2082 sizeof(expn) - freq->stream.avail_out);
2083 } while (freq->stream.avail_in && freq->zret == Z_OK);
2084 return size;
2085}
2086struct http_object_request *new_http_object_request(const char *base_url,
2088 unsigned char *sha1)
2089{
2090 char *hex = sha1_to_hex(sha1);
2091 const char *filename;
2092 char prevfile[PATH_MAX];
2093 int prevlocal;
2094 char prev_buf[PREV_BUF_SIZE];
2095 ssize_t prev_read = 0;
2096 off_t prev_posn = 0;
2097 struct http_object_request *freq;
2098 freq = xcalloc(1, sizeof(*freq));
2100 hashcpy(freq->sha1, sha1);
2101 freq->localfile = -1;
2102 filename = sha1_file_name(sha1);
2104 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2105 "%s.temp", filename);
2106 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2108 unlink_or_warn(prevfile);
2109 rename(freq->tmpfile, prevfile);
2110 unlink_or_warn(freq->tmpfile);
2111 if (freq->localfile != -1)
2113 error("fd leakage in start: %d", freq->localfile);
2114 freq->localfile = open(freq->tmpfile,
2115 O_WRONLY | O_CREAT | O_EXCL, 0666);
2116 /*
2117 * This could have failed due to the "lazy directory creation";
2118 * try to mkdir the last path component.
2119 */
2120 if (freq->localfile < 0 && errno == ENOENT) {
2121 char *dir = strrchr(freq->tmpfile, '/');
2122 if (dir) {
2123 *dir = 0;
2124 mkdir(freq->tmpfile, 0777);
2125 *dir = '/';
2126 }
2127 freq->localfile = open(freq->tmpfile,
2128 O_WRONLY | O_CREAT | O_EXCL, 0666);
2129 }
2130 if (freq->localfile < 0) {
2132 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2133 goto abort;
2134 }
2135 git_inflate_init(&freq->stream);
2137 git_SHA1_Init(&freq->c);
2139 freq->url = get_remote_object_url(base_url, hex, 0);
2141 /*
2143 * If a previous temp file is present, process what was already
2144 * fetched.
2145 */
2146 prevlocal = open(prevfile, O_RDONLY);
2147 if (prevlocal != -1) {
2148 do {
2149 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2150 if (prev_read>0) {
2151 if (fwrite_sha1_file(prev_buf,
2152 1,
2153 prev_read,
2154 freq) == prev_read) {
2155 prev_posn += prev_read;
2156 } else {
2157 prev_read = -1;
2158 }
2159 }
2160 } while (prev_read > 0);
2161 close(prevlocal);
2162 }
2163 unlink_or_warn(prevfile);
2164 /*
2166 * Reset inflate/SHA1 if there was an error reading the previous temp
2167 * file; also rewind to the beginning of the local file.
2168 */
2169 if (prev_read == -1) {
2170 memset(&freq->stream, 0, sizeof(freq->stream));
2171 git_inflate_init(&freq->stream);
2172 git_SHA1_Init(&freq->c);
2173 if (prev_posn>0) {
2174 prev_posn = 0;
2175 lseek(freq->localfile, 0, SEEK_SET);
2176 if (ftruncate(freq->localfile, 0) < 0) {
2177 error_errno("Couldn't truncate temporary file %s",
2178 freq->tmpfile);
2179 goto abort;
2180 }
2181 }
2182 }
2183 freq->slot = get_active_slot();
2185 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2187 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2188 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2189 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2190 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2191 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2192 /*
2194 * If we have successfully processed data from a previous fetch
2195 * attempt, only fetch the data we don't already have.
2196 */
2197 if (prev_posn>0) {
2198 if (http_is_verbose)
2199 fprintf(stderr,
2200 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2201 hex, (uintmax_t)prev_posn);
2202 http_opt_request_remainder(freq->slot->curl, prev_posn);
2203 }
2204 return freq;
2206abort:
2208 free(freq->url);
2209 free(freq);
2210 return NULL;
2211}
2212void process_http_object_request(struct http_object_request *freq)
2214{
2215 if (freq->slot == NULL)
2216 return;
2217 freq->curl_result = freq->slot->curl_result;
2218 freq->http_code = freq->slot->http_code;
2219 freq->slot = NULL;
2220}
2221int finish_http_object_request(struct http_object_request *freq)
2223{
2224 struct stat st;
2225 close(freq->localfile);
2227 freq->localfile = -1;
2228 process_http_object_request(freq);
2230 if (freq->http_code == 416) {
2232 warning("requested range invalid; we may already have all the data.");
2233 } else if (freq->curl_result != CURLE_OK) {
2234 if (stat(freq->tmpfile, &st) == 0)
2235 if (st.st_size == 0)
2236 unlink_or_warn(freq->tmpfile);
2237 return -1;
2238 }
2239 git_inflate_end(&freq->stream);
2241 git_SHA1_Final(freq->real_sha1, &freq->c);
2242 if (freq->zret != Z_STREAM_END) {
2243 unlink_or_warn(freq->tmpfile);
2244 return -1;
2245 }
2246 if (hashcmp(freq->sha1, freq->real_sha1)) {
2247 unlink_or_warn(freq->tmpfile);
2248 return -1;
2249 }
2250 freq->rename =
2251 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2252 return freq->rename;
2254}
2255void abort_http_object_request(struct http_object_request *freq)
2257{
2258 unlink_or_warn(freq->tmpfile);
2259 release_http_object_request(freq);
2261}
2262void release_http_object_request(struct http_object_request *freq)
2264{
2265 if (freq->localfile != -1) {
2266 close(freq->localfile);
2267 freq->localfile = -1;
2268 }
2269 if (freq->url != NULL) {
2270 free(freq->url);
2271 freq->url = NULL;
2272 }
2273 if (freq->slot != NULL) {
2274 freq->slot->callback_func = NULL;
2275 freq->slot->callback_data = NULL;
2276 release_active_slot(freq->slot);
2277 freq->slot = NULL;
2278 }
2279}