1#include "git-compat-util.h"
2#include "http.h"
3#include "config.h"
4#include "pack.h"
5#include "sideband.h"
6#include "run-command.h"
7#include "url.h"
8#include "urlmatch.h"
9#include "credential.h"
10#include "version.h"
11#include "pkt-line.h"
12#include "gettext.h"
13#include "transport.h"
14#include "packfile.h"
15#include "protocol.h"
16#include "string-list.h"
17#include "object-store.h"
18static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
20static int trace_curl_data = 1;
21static struct string_list cookies_to_redact = STRING_LIST_INIT_DUP;
22#if LIBCURL_VERSION_NUM >= 0x070a08
23long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
24#else
25long int git_curl_ipresolve;
26#endif
27int active_requests;
28int http_is_verbose;
29ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
30#if LIBCURL_VERSION_NUM >= 0x070a06
32#define LIBCURL_CAN_HANDLE_AUTH_ANY
33#endif
34static int min_curl_sessions = 1;
36static int curl_session_count;
37#ifdef USE_CURL_MULTI
38static int max_requests = -1;
39static CURLM *curlm;
40#endif
41#ifndef NO_CURL_EASY_DUPHANDLE
42static CURL *curl_default;
43#endif
44#define PREV_BUF_SIZE 4096
46char curl_errorstr[CURL_ERROR_SIZE];
48static int curl_ssl_verify = -1;
50static int curl_ssl_try;
51static const char *ssl_cert;
52static const char *ssl_cipherlist;
53static const char *ssl_version;
54static struct {
55 const char *name;
56 long ssl_version;
57} sslversions[] = {
58 { "sslv2", CURL_SSLVERSION_SSLv2 },
59 { "sslv3", CURL_SSLVERSION_SSLv3 },
60 { "tlsv1", CURL_SSLVERSION_TLSv1 },
61#if LIBCURL_VERSION_NUM >= 0x072200
62 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
63 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
64 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
65#endif
66#if LIBCURL_VERSION_NUM >= 0x073400
67 { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
68#endif
69};
70#if LIBCURL_VERSION_NUM >= 0x070903
71static const char *ssl_key;
72#endif
73#if LIBCURL_VERSION_NUM >= 0x070908
74static const char *ssl_capath;
75#endif
76#if LIBCURL_VERSION_NUM >= 0x071304
77static const char *curl_no_proxy;
78#endif
79#if LIBCURL_VERSION_NUM >= 0x072c00
80static const char *ssl_pinnedkey;
81#endif
82static const char *ssl_cainfo;
83static long curl_low_speed_limit = -1;
84static long curl_low_speed_time = -1;
85static int curl_ftp_no_epsv;
86static const char *curl_http_proxy;
87static const char *http_proxy_authmethod;
88static struct {
89 const char *name;
90 long curlauth_param;
91} proxy_authmethods[] = {
92 { "basic", CURLAUTH_BASIC },
93 { "digest", CURLAUTH_DIGEST },
94 { "negotiate", CURLAUTH_GSSNEGOTIATE },
95 { "ntlm", CURLAUTH_NTLM },
96#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
97 { "anyauth", CURLAUTH_ANY },
98#endif
99 /*
100 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
101 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
102 * here, too
103 */
104};
105#ifdef CURLGSSAPI_DELEGATION_FLAG
106static const char *curl_deleg;
107static struct {
108 const char *name;
109 long curl_deleg_param;
110} curl_deleg_levels[] = {
111 { "none", CURLGSSAPI_DELEGATION_NONE },
112 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
113 { "always", CURLGSSAPI_DELEGATION_FLAG },
114};
115#endif
116static struct credential proxy_auth = CREDENTIAL_INIT;
118static const char *curl_proxyuserpwd;
119static const char *curl_cookie_file;
120static int curl_save_cookies;
121struct credential http_auth = CREDENTIAL_INIT;
122static int http_proactive_auth;
123static const char *user_agent;
124static int curl_empty_auth = -1;
125enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
127#if LIBCURL_VERSION_NUM >= 0x071700
129/* Use CURLOPT_KEYPASSWD as is */
130#elif LIBCURL_VERSION_NUM >= 0x070903
131#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
132#else
133#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
134#endif
135static struct credential cert_auth = CREDENTIAL_INIT;
137static int ssl_cert_password_required;
138#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
139static unsigned long http_auth_methods = CURLAUTH_ANY;
140static int http_auth_methods_restricted;
141/* Modes for which empty_auth cannot actually help us. */
142static unsigned long empty_auth_useless =
143 CURLAUTH_BASIC
144#ifdef CURLAUTH_DIGEST_IE
145 | CURLAUTH_DIGEST_IE
146#endif
147 | CURLAUTH_DIGEST;
148#endif
149static struct curl_slist *pragma_header;
151static struct curl_slist *no_pragma_header;
152static struct curl_slist *extra_http_headers;
153static struct active_request_slot *active_queue_head;
155static char *cached_accept_language;
157static char *http_ssl_backend;
159size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
161{
162 size_t size = eltsize * nmemb;
163 struct buffer *buffer = buffer_;
164 if (size > buffer->buf.len - buffer->posn)
166 size = buffer->buf.len - buffer->posn;
167 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
168 buffer->posn += size;
169 return size;
171}
172#ifndef NO_CURL_IOCTL
174curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
175{
176 struct buffer *buffer = clientp;
177 switch (cmd) {
179 case CURLIOCMD_NOP:
180 return CURLIOE_OK;
181 case CURLIOCMD_RESTARTREAD:
183 buffer->posn = 0;
184 return CURLIOE_OK;
185 default:
187 return CURLIOE_UNKNOWNCMD;
188 }
189}
190#endif
191size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
193{
194 size_t size = eltsize * nmemb;
195 struct strbuf *buffer = buffer_;
196 strbuf_add(buffer, ptr, size);
198 return size;
199}
200size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
202{
203 return eltsize * nmemb;
204}
205static void closedown_active_slot(struct active_request_slot *slot)
207{
208 active_requests--;
209 slot->in_use = 0;
210}
211static void finish_active_slot(struct active_request_slot *slot)
213{
214 closedown_active_slot(slot);
215 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
216 if (slot->finished != NULL)
218 (*slot->finished) = 1;
219 /* Store slot results so they can be read after the slot is reused */
221 if (slot->results != NULL) {
222 slot->results->curl_result = slot->curl_result;
223 slot->results->http_code = slot->http_code;
224#if LIBCURL_VERSION_NUM >= 0x070a08
225 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
226 &slot->results->auth_avail);
227#else
228 slot->results->auth_avail = 0;
229#endif
230 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
232 &slot->results->http_connectcode);
233 }
234 /* Run callback if appropriate */
236 if (slot->callback_func != NULL)
237 slot->callback_func(slot->callback_data);
238}
239static void xmulti_remove_handle(struct active_request_slot *slot)
241{
242#ifdef USE_CURL_MULTI
243 curl_multi_remove_handle(curlm, slot->curl);
244#endif
245}
246#ifdef USE_CURL_MULTI
248static void process_curl_messages(void)
249{
250 int num_messages;
251 struct active_request_slot *slot;
252 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
253 while (curl_message != NULL) {
255 if (curl_message->msg == CURLMSG_DONE) {
256 int curl_result = curl_message->data.result;
257 slot = active_queue_head;
258 while (slot != NULL &&
259 slot->curl != curl_message->easy_handle)
260 slot = slot->next;
261 if (slot != NULL) {
262 xmulti_remove_handle(slot);
263 slot->curl_result = curl_result;
264 finish_active_slot(slot);
265 } else {
266 fprintf(stderr, "Received DONE message for unknown request!\n");
267 }
268 } else {
269 fprintf(stderr, "Unknown CURL message received: %d\n",
270 (int)curl_message->msg);
271 }
272 curl_message = curl_multi_info_read(curlm, &num_messages);
273 }
274}
275#endif
276static int http_options(const char *var, const char *value, void *cb)
278{
279 if (!strcmp("http.sslverify", var)) {
280 curl_ssl_verify = git_config_bool(var, value);
281 return 0;
282 }
283 if (!strcmp("http.sslcipherlist", var))
284 return git_config_string(&ssl_cipherlist, var, value);
285 if (!strcmp("http.sslversion", var))
286 return git_config_string(&ssl_version, var, value);
287 if (!strcmp("http.sslcert", var))
288 return git_config_pathname(&ssl_cert, var, value);
289#if LIBCURL_VERSION_NUM >= 0x070903
290 if (!strcmp("http.sslkey", var))
291 return git_config_pathname(&ssl_key, var, value);
292#endif
293#if LIBCURL_VERSION_NUM >= 0x070908
294 if (!strcmp("http.sslcapath", var))
295 return git_config_pathname(&ssl_capath, var, value);
296#endif
297 if (!strcmp("http.sslcainfo", var))
298 return git_config_pathname(&ssl_cainfo, var, value);
299 if (!strcmp("http.sslcertpasswordprotected", var)) {
300 ssl_cert_password_required = git_config_bool(var, value);
301 return 0;
302 }
303 if (!strcmp("http.ssltry", var)) {
304 curl_ssl_try = git_config_bool(var, value);
305 return 0;
306 }
307 if (!strcmp("http.sslbackend", var)) {
308 free(http_ssl_backend);
309 http_ssl_backend = xstrdup_or_null(value);
310 return 0;
311 }
312 if (!strcmp("http.minsessions", var)) {
314 min_curl_sessions = git_config_int(var, value);
315#ifndef USE_CURL_MULTI
316 if (min_curl_sessions > 1)
317 min_curl_sessions = 1;
318#endif
319 return 0;
320 }
321#ifdef USE_CURL_MULTI
322 if (!strcmp("http.maxrequests", var)) {
323 max_requests = git_config_int(var, value);
324 return 0;
325 }
326#endif
327 if (!strcmp("http.lowspeedlimit", var)) {
328 curl_low_speed_limit = (long)git_config_int(var, value);
329 return 0;
330 }
331 if (!strcmp("http.lowspeedtime", var)) {
332 curl_low_speed_time = (long)git_config_int(var, value);
333 return 0;
334 }
335 if (!strcmp("http.noepsv", var)) {
337 curl_ftp_no_epsv = git_config_bool(var, value);
338 return 0;
339 }
340 if (!strcmp("http.proxy", var))
341 return git_config_string(&curl_http_proxy, var, value);
342 if (!strcmp("http.proxyauthmethod", var))
344 return git_config_string(&http_proxy_authmethod, var, value);
345 if (!strcmp("http.cookiefile", var))
347 return git_config_pathname(&curl_cookie_file, var, value);
348 if (!strcmp("http.savecookies", var)) {
349 curl_save_cookies = git_config_bool(var, value);
350 return 0;
351 }
352 if (!strcmp("http.postbuffer", var)) {
354 http_post_buffer = git_config_ssize_t(var, value);
355 if (http_post_buffer < 0)
356 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
357 if (http_post_buffer < LARGE_PACKET_MAX)
358 http_post_buffer = LARGE_PACKET_MAX;
359 return 0;
360 }
361 if (!strcmp("http.useragent", var))
363 return git_config_string(&user_agent, var, value);
364 if (!strcmp("http.emptyauth", var)) {
366 if (value && !strcmp("auto", value))
367 curl_empty_auth = -1;
368 else
369 curl_empty_auth = git_config_bool(var, value);
370 return 0;
371 }
372 if (!strcmp("http.delegation", var)) {
374#ifdef CURLGSSAPI_DELEGATION_FLAG
375 return git_config_string(&curl_deleg, var, value);
376#else
377 warning(_("Delegation control is not supported with cURL < 7.22.0"));
378 return 0;
379#endif
380 }
381 if (!strcmp("http.pinnedpubkey", var)) {
383#if LIBCURL_VERSION_NUM >= 0x072c00
384 return git_config_pathname(&ssl_pinnedkey, var, value);
385#else
386 warning(_("Public key pinning not supported with cURL < 7.44.0"));
387 return 0;
388#endif
389 }
390 if (!strcmp("http.extraheader", var)) {
392 if (!value) {
393 return config_error_nonbool(var);
394 } else if (!*value) {
395 curl_slist_free_all(extra_http_headers);
396 extra_http_headers = NULL;
397 } else {
398 extra_http_headers =
399 curl_slist_append(extra_http_headers, value);
400 }
401 return 0;
402 }
403 if (!strcmp("http.followredirects", var)) {
405 if (value && !strcmp(value, "initial"))
406 http_follow_config = HTTP_FOLLOW_INITIAL;
407 else if (git_config_bool(var, value))
408 http_follow_config = HTTP_FOLLOW_ALWAYS;
409 else
410 http_follow_config = HTTP_FOLLOW_NONE;
411 return 0;
412 }
413 /* Fall back on the default ones */
415 return git_default_config(var, value, cb);
416}
417static int curl_empty_auth_enabled(void)
419{
420 if (curl_empty_auth >= 0)
421 return curl_empty_auth;
422#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
424 /*
425 * Our libcurl is too old to do AUTH_ANY in the first place;
426 * just default to turning the feature off.
427 */
428#else
429 /*
430 * In the automatic case, kick in the empty-auth
431 * hack as long as we would potentially try some
432 * method more exotic than "Basic" or "Digest".
433 *
434 * But only do this when this is our second or
435 * subsequent request, as by then we know what
436 * methods are available.
437 */
438 if (http_auth_methods_restricted &&
439 (http_auth_methods & ~empty_auth_useless))
440 return 1;
441#endif
442 return 0;
443}
444static void init_curl_http_auth(CURL *result)
446{
447 if (!http_auth.username || !*http_auth.username) {
448 if (curl_empty_auth_enabled())
449 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
450 return;
451 }
452 credential_fill(&http_auth);
454#if LIBCURL_VERSION_NUM >= 0x071301
456 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
457 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
458#else
459 {
460 static struct strbuf up = STRBUF_INIT;
461 /*
462 * Note that we assume we only ever have a single set of
463 * credentials in a given program run, so we do not have
464 * to worry about updating this buffer, only setting its
465 * initial value.
466 */
467 if (!up.len)
468 strbuf_addf(&up, "%s:%s",
469 http_auth.username, http_auth.password);
470 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
471 }
472#endif
473}
474/* *var must be free-able */
476static void var_override(const char **var, char *value)
477{
478 if (value) {
479 free((void *)*var);
480 *var = xstrdup(value);
481 }
482}
483static void set_proxyauth_name_password(CURL *result)
485{
486#if LIBCURL_VERSION_NUM >= 0x071301
487 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
488 proxy_auth.username);
489 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
490 proxy_auth.password);
491#else
492 struct strbuf s = STRBUF_INIT;
493 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
495 strbuf_addch(&s, ':');
496 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
497 curl_proxyuserpwd = strbuf_detach(&s, NULL);
498 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
499#endif
500}
501static void init_curl_proxy_auth(CURL *result)
503{
504 if (proxy_auth.username) {
505 if (!proxy_auth.password)
506 credential_fill(&proxy_auth);
507 set_proxyauth_name_password(result);
508 }
509 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
511#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
513 if (http_proxy_authmethod) {
514 int i;
515 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
516 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
517 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
518 proxy_authmethods[i].curlauth_param);
519 break;
520 }
521 }
522 if (i == ARRAY_SIZE(proxy_authmethods)) {
523 warning("unsupported proxy authentication method %s: using anyauth",
524 http_proxy_authmethod);
525 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
526 }
527 }
528 else
529 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
530#endif
531}
532static int has_cert_password(void)
534{
535 if (ssl_cert == NULL || ssl_cert_password_required != 1)
536 return 0;
537 if (!cert_auth.password) {
538 cert_auth.protocol = xstrdup("cert");
539 cert_auth.username = xstrdup("");
540 cert_auth.path = xstrdup(ssl_cert);
541 credential_fill(&cert_auth);
542 }
543 return 1;
544}
545#if LIBCURL_VERSION_NUM >= 0x071900
547static void set_curl_keepalive(CURL *c)
548{
549 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
550}
551#elif LIBCURL_VERSION_NUM >= 0x071000
553static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
554{
555 int ka = 1;
556 int rc;
557 socklen_t len = (socklen_t)sizeof(ka);
558 if (type != CURLSOCKTYPE_IPCXN)
560 return 0;
561 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
563 if (rc < 0)
564 warning_errno("unable to set SO_KEEPALIVE on socket");
565 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
567}
568static void set_curl_keepalive(CURL *c)
570{
571 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
572}
573#else
575static void set_curl_keepalive(CURL *c)
576{
577 /* not supported on older curl versions */
578}
579#endif
580static void redact_sensitive_header(struct strbuf *header)
582{
583 const char *sensitive_header;
584 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
586 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
587 /* The first token is the type, which is OK to log */
588 while (isspace(*sensitive_header))
589 sensitive_header++;
590 while (*sensitive_header && !isspace(*sensitive_header))
591 sensitive_header++;
592 /* Everything else is opaque and possibly sensitive */
593 strbuf_setlen(header, sensitive_header - header->buf);
594 strbuf_addstr(header, " <redacted>");
595 } else if (cookies_to_redact.nr &&
596 skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
597 struct strbuf redacted_header = STRBUF_INIT;
598 char *cookie;
599 while (isspace(*sensitive_header))
601 sensitive_header++;
602 /*
604 * The contents of header starting from sensitive_header will
605 * subsequently be overridden, so it is fine to mutate this
606 * string (hence the assignment to "char *").
607 */
608 cookie = (char *) sensitive_header;
609 while (cookie) {
611 char *equals;
612 char *semicolon = strstr(cookie, "; ");
613 if (semicolon)
614 *semicolon = 0;
615 equals = strchrnul(cookie, '=');
616 if (!equals) {
617 /* invalid cookie, just append and continue */
618 strbuf_addstr(&redacted_header, cookie);
619 continue;
620 }
621 *equals = 0; /* temporarily set to NUL for lookup */
622 if (string_list_lookup(&cookies_to_redact, cookie)) {
623 strbuf_addstr(&redacted_header, cookie);
624 strbuf_addstr(&redacted_header, "=<redacted>");
625 } else {
626 *equals = '=';
627 strbuf_addstr(&redacted_header, cookie);
628 }
629 if (semicolon) {
630 /*
631 * There are more cookies. (Or, for some
632 * reason, the input string ends in "; ".)
633 */
634 strbuf_addstr(&redacted_header, "; ");
635 cookie = semicolon + strlen("; ");
636 } else {
637 cookie = NULL;
638 }
639 }
640 strbuf_setlen(header, sensitive_header - header->buf);
642 strbuf_addbuf(header, &redacted_header);
643 }
644}
645static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
647{
648 struct strbuf out = STRBUF_INIT;
649 struct strbuf **headers, **header;
650 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
652 text, (long)size, (long)size);
653 trace_strbuf(&trace_curl, &out);
654 strbuf_reset(&out);
655 strbuf_add(&out, ptr, size);
656 headers = strbuf_split_max(&out, '\n', 0);
657 for (header = headers; *header; header++) {
659 if (hide_sensitive_header)
660 redact_sensitive_header(*header);
661 strbuf_insert((*header), 0, text, strlen(text));
662 strbuf_insert((*header), strlen(text), ": ", 2);
663 strbuf_rtrim((*header));
664 strbuf_addch((*header), '\n');
665 trace_strbuf(&trace_curl, (*header));
666 }
667 strbuf_list_free(headers);
668 strbuf_release(&out);
669}
670static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
672{
673 size_t i;
674 struct strbuf out = STRBUF_INIT;
675 unsigned int width = 60;
676 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
678 text, (long)size, (long)size);
679 trace_strbuf(&trace_curl, &out);
680 for (i = 0; i < size; i += width) {
682 size_t w;
683 strbuf_reset(&out);
685 strbuf_addf(&out, "%s: ", text);
686 for (w = 0; (w < width) && (i + w < size); w++) {
687 unsigned char ch = ptr[i + w];
688 strbuf_addch(&out,
690 (ch >= 0x20) && (ch < 0x80)
691 ? ch : '.');
692 }
693 strbuf_addch(&out, '\n');
694 trace_strbuf(&trace_curl, &out);
695 }
696 strbuf_release(&out);
697}
698static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
700{
701 const char *text;
702 enum { NO_FILTER = 0, DO_FILTER = 1 };
703 switch (type) {
705 case CURLINFO_TEXT:
706 trace_printf_key(&trace_curl, "== Info: %s", data);
707 break;
708 case CURLINFO_HEADER_OUT:
709 text = "=> Send header";
710 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
711 break;
712 case CURLINFO_DATA_OUT:
713 if (trace_curl_data) {
714 text = "=> Send data";
715 curl_dump_data(text, (unsigned char *)data, size);
716 }
717 break;
718 case CURLINFO_SSL_DATA_OUT:
719 if (trace_curl_data) {
720 text = "=> Send SSL data";
721 curl_dump_data(text, (unsigned char *)data, size);
722 }
723 break;
724 case CURLINFO_HEADER_IN:
725 text = "<= Recv header";
726 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
727 break;
728 case CURLINFO_DATA_IN:
729 if (trace_curl_data) {
730 text = "<= Recv data";
731 curl_dump_data(text, (unsigned char *)data, size);
732 }
733 break;
734 case CURLINFO_SSL_DATA_IN:
735 if (trace_curl_data) {
736 text = "<= Recv SSL data";
737 curl_dump_data(text, (unsigned char *)data, size);
738 }
739 break;
740 default: /* we ignore unknown types by default */
742 return 0;
743 }
744 return 0;
745}
746void setup_curl_trace(CURL *handle)
748{
749 if (!trace_want(&trace_curl))
750 return;
751 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
752 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
753 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
754}
755#ifdef CURLPROTO_HTTP
757static long get_curl_allowed_protocols(int from_user)
758{
759 long allowed_protocols = 0;
760 if (is_transport_allowed("http", from_user))
762 allowed_protocols |= CURLPROTO_HTTP;
763 if (is_transport_allowed("https", from_user))
764 allowed_protocols |= CURLPROTO_HTTPS;
765 if (is_transport_allowed("ftp", from_user))
766 allowed_protocols |= CURLPROTO_FTP;
767 if (is_transport_allowed("ftps", from_user))
768 allowed_protocols |= CURLPROTO_FTPS;
769 return allowed_protocols;
771}
772#endif
773static CURL *get_curl_handle(void)
775{
776 CURL *result = curl_easy_init();
777 if (!result)
779 die("curl_easy_init failed");
780 if (!curl_ssl_verify) {
782 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
783 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
784 } else {
785 /* Verify authenticity of the peer's certificate */
786 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
787 /* The name in the cert must match whom we tried to connect */
788 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
789 }
790#if LIBCURL_VERSION_NUM >= 0x070907
792 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
793#endif
794#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
795 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
796#endif
797#ifdef CURLGSSAPI_DELEGATION_FLAG
799 if (curl_deleg) {
800 int i;
801 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
802 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
803 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
804 curl_deleg_levels[i].curl_deleg_param);
805 break;
806 }
807 }
808 if (i == ARRAY_SIZE(curl_deleg_levels))
809 warning("Unknown delegation method '%s': using default",
810 curl_deleg);
811 }
812#endif
813 if (http_proactive_auth)
815 init_curl_http_auth(result);
816 if (getenv("GIT_SSL_VERSION"))
818 ssl_version = getenv("GIT_SSL_VERSION");
819 if (ssl_version && *ssl_version) {
820 int i;
821 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
822 if (!strcmp(ssl_version, sslversions[i].name)) {
823 curl_easy_setopt(result, CURLOPT_SSLVERSION,
824 sslversions[i].ssl_version);
825 break;
826 }
827 }
828 if (i == ARRAY_SIZE(sslversions))
829 warning("unsupported ssl version %s: using default",
830 ssl_version);
831 }
832 if (getenv("GIT_SSL_CIPHER_LIST"))
834 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
835 if (ssl_cipherlist != NULL && *ssl_cipherlist)
836 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
837 ssl_cipherlist);
838 if (ssl_cert != NULL)
840 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
841 if (has_cert_password())
842 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
843#if LIBCURL_VERSION_NUM >= 0x070903
844 if (ssl_key != NULL)
845 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
846#endif
847#if LIBCURL_VERSION_NUM >= 0x070908
848 if (ssl_capath != NULL)
849 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
850#endif
851#if LIBCURL_VERSION_NUM >= 0x072c00
852 if (ssl_pinnedkey != NULL)
853 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
854#endif
855 if (ssl_cainfo != NULL)
856 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
857 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
859 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
860 curl_low_speed_limit);
861 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
862 curl_low_speed_time);
863 }
864 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
866#if LIBCURL_VERSION_NUM >= 0x071301
867 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
868#elif LIBCURL_VERSION_NUM >= 0x071101
869 curl_easy_setopt(result, CURLOPT_POST301, 1);
870#endif
871#ifdef CURLPROTO_HTTP
872 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
873 get_curl_allowed_protocols(0));
874 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
875 get_curl_allowed_protocols(-1));
876#else
877 warning("protocol restrictions not applied to curl redirects because\n"
878 "your curl version is too old (>= 7.19.4)");
879#endif
880 if (getenv("GIT_CURL_VERBOSE"))
881 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
882 setup_curl_trace(result);
883 if (getenv("GIT_TRACE_CURL_NO_DATA"))
884 trace_curl_data = 0;
885 if (getenv("GIT_REDACT_COOKIES")) {
886 string_list_split(&cookies_to_redact,
887 getenv("GIT_REDACT_COOKIES"), ',', -1);
888 string_list_sort(&cookies_to_redact);
889 }
890 curl_easy_setopt(result, CURLOPT_USERAGENT,
892 user_agent ? user_agent : git_user_agent());
893 if (curl_ftp_no_epsv)
895 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
896#ifdef CURLOPT_USE_SSL
898 if (curl_ssl_try)
899 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
900#endif
901 /*
903 * CURL also examines these variables as a fallback; but we need to query
904 * them here in order to decide whether to prompt for missing password (cf.
905 * init_curl_proxy_auth()).
906 *
907 * Unlike many other common environment variables, these are historically
908 * lowercase only. It appears that CURL did not know this and implemented
909 * only uppercase variants, which was later corrected to take both - with
910 * the exception of http_proxy, which is lowercase only also in CURL. As
911 * the lowercase versions are the historical quasi-standard, they take
912 * precedence here, as in CURL.
913 */
914 if (!curl_http_proxy) {
915 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
916 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
917 var_override(&curl_http_proxy, getenv("https_proxy"));
918 } else {
919 var_override(&curl_http_proxy, getenv("http_proxy"));
920 }
921 if (!curl_http_proxy) {
922 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
923 var_override(&curl_http_proxy, getenv("all_proxy"));
924 }
925 }
926 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
928 /*
929 * Handle case with the empty http.proxy value here to keep
930 * common code clean.
931 * NB: empty option disables proxying at all.
932 */
933 curl_easy_setopt(result, CURLOPT_PROXY, "");
934 } else if (curl_http_proxy) {
935#if LIBCURL_VERSION_NUM >= 0x071800
936 if (starts_with(curl_http_proxy, "socks5h"))
937 curl_easy_setopt(result,
938 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
939 else if (starts_with(curl_http_proxy, "socks5"))
940 curl_easy_setopt(result,
941 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
942 else if (starts_with(curl_http_proxy, "socks4a"))
943 curl_easy_setopt(result,
944 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
945 else if (starts_with(curl_http_proxy, "socks"))
946 curl_easy_setopt(result,
947 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
948#endif
949#if LIBCURL_VERSION_NUM >= 0x073400
950 else if (starts_with(curl_http_proxy, "https"))
951 curl_easy_setopt(result,
952 CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
953#endif
954 if (strstr(curl_http_proxy, "://"))
955 credential_from_url(&proxy_auth, curl_http_proxy);
956 else {
957 struct strbuf url = STRBUF_INIT;
958 strbuf_addf(&url, "http://%s", curl_http_proxy);
959 credential_from_url(&proxy_auth, url.buf);
960 strbuf_release(&url);
961 }
962 if (!proxy_auth.host)
964 die("Invalid proxy URL '%s'", curl_http_proxy);
965 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
967#if LIBCURL_VERSION_NUM >= 0x071304
968 var_override(&curl_no_proxy, getenv("NO_PROXY"));
969 var_override(&curl_no_proxy, getenv("no_proxy"));
970 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
971#endif
972 }
973 init_curl_proxy_auth(result);
974 set_curl_keepalive(result);
976 return result;
978}
979static void set_from_env(const char **var, const char *envname)
981{
982 const char *val = getenv(envname);
983 if (val)
984 *var = val;
985}
986void http_init(struct remote *remote, const char *url, int proactive_auth)
988{
989 char *low_speed_limit;
990 char *low_speed_time;
991 char *normalized_url;
992 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
993 config.section = "http";
995 config.key = NULL;
996 config.collect_fn = http_options;
997 config.cascade_fn = git_default_config;
998 config.cb = NULL;
999 http_is_verbose = 0;
1001 normalized_url = url_normalize(url, &config.url);
1002 git_config(urlmatch_config_entry, &config);
1004 free(normalized_url);
1005#if LIBCURL_VERSION_NUM >= 0x073800
1007 if (http_ssl_backend) {
1008 const curl_ssl_backend **backends;
1009 struct strbuf buf = STRBUF_INIT;
1010 int i;
1011 switch (curl_global_sslset(-1, http_ssl_backend, &backends)) {
1013 case CURLSSLSET_UNKNOWN_BACKEND:
1014 strbuf_addf(&buf, _("Unsupported SSL backend '%s'. "
1015 "Supported SSL backends:"),
1016 http_ssl_backend);
1017 for (i = 0; backends[i]; i++)
1018 strbuf_addf(&buf, "\n\t%s", backends[i]->name);
1019 die("%s", buf.buf);
1020 case CURLSSLSET_NO_BACKENDS:
1021 die(_("Could not set SSL backend to '%s': "
1022 "cURL was built without SSL backends"),
1023 http_ssl_backend);
1024 case CURLSSLSET_TOO_LATE:
1025 die(_("Could not set SSL backend to '%s': already set"),
1026 http_ssl_backend);
1027 case CURLSSLSET_OK:
1028 break; /* Okay! */
1029 }
1030 }
1031#endif
1032 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1034 die("curl_global_init failed");
1035 http_proactive_auth = proactive_auth;
1037 if (remote && remote->http_proxy)
1039 curl_http_proxy = xstrdup(remote->http_proxy);
1040 if (remote)
1042 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1043 pragma_header = curl_slist_append(http_copy_default_headers(),
1045 "Pragma: no-cache");
1046 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1047 "Pragma:");
1048#ifdef USE_CURL_MULTI
1050 {
1051 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1052 if (http_max_requests != NULL)
1053 max_requests = atoi(http_max_requests);
1054 }
1055 curlm = curl_multi_init();
1057 if (!curlm)
1058 die("curl_multi_init failed");
1059#endif
1060 if (getenv("GIT_SSL_NO_VERIFY"))
1062 curl_ssl_verify = 0;
1063 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1065#if LIBCURL_VERSION_NUM >= 0x070903
1066 set_from_env(&ssl_key, "GIT_SSL_KEY");
1067#endif
1068#if LIBCURL_VERSION_NUM >= 0x070908
1069 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1070#endif
1071 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1072 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1074 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1076 if (low_speed_limit != NULL)
1077 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1078 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1079 if (low_speed_time != NULL)
1080 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1081 if (curl_ssl_verify == -1)
1083 curl_ssl_verify = 1;
1084 curl_session_count = 0;
1086#ifdef USE_CURL_MULTI
1087 if (max_requests < 1)
1088 max_requests = DEFAULT_MAX_REQUESTS;
1089#endif
1090 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1092 curl_ftp_no_epsv = 1;
1093 if (url) {
1095 credential_from_url(&http_auth, url);
1096 if (!ssl_cert_password_required &&
1097 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1098 starts_with(url, "https://"))
1099 ssl_cert_password_required = 1;
1100 }
1101#ifndef NO_CURL_EASY_DUPHANDLE
1103 curl_default = get_curl_handle();
1104#endif
1105}
1106void http_cleanup(void)
1108{
1109 struct active_request_slot *slot = active_queue_head;
1110 while (slot != NULL) {
1112 struct active_request_slot *next = slot->next;
1113 if (slot->curl != NULL) {
1114 xmulti_remove_handle(slot);
1115 curl_easy_cleanup(slot->curl);
1116 }
1117 free(slot);
1118 slot = next;
1119 }
1120 active_queue_head = NULL;
1121#ifndef NO_CURL_EASY_DUPHANDLE
1123 curl_easy_cleanup(curl_default);
1124#endif
1125#ifdef USE_CURL_MULTI
1127 curl_multi_cleanup(curlm);
1128#endif
1129 curl_global_cleanup();
1130 curl_slist_free_all(extra_http_headers);
1132 extra_http_headers = NULL;
1133 curl_slist_free_all(pragma_header);
1135 pragma_header = NULL;
1136 curl_slist_free_all(no_pragma_header);
1138 no_pragma_header = NULL;
1139 if (curl_http_proxy) {
1141 free((void *)curl_http_proxy);
1142 curl_http_proxy = NULL;
1143 }
1144 if (proxy_auth.password) {
1146 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1147 FREE_AND_NULL(proxy_auth.password);
1148 }
1149 free((void *)curl_proxyuserpwd);
1151 curl_proxyuserpwd = NULL;
1152 free((void *)http_proxy_authmethod);
1154 http_proxy_authmethod = NULL;
1155 if (cert_auth.password != NULL) {
1157 memset(cert_auth.password, 0, strlen(cert_auth.password));
1158 FREE_AND_NULL(cert_auth.password);
1159 }
1160 ssl_cert_password_required = 0;
1161 FREE_AND_NULL(cached_accept_language);
1163}
1164struct active_request_slot *get_active_slot(void)
1166{
1167 struct active_request_slot *slot = active_queue_head;
1168 struct active_request_slot *newslot;
1169#ifdef USE_CURL_MULTI
1171 int num_transfers;
1172 /* Wait for a slot to open up if the queue is full */
1174 while (active_requests >= max_requests) {
1175 curl_multi_perform(curlm, &num_transfers);
1176 if (num_transfers < active_requests)
1177 process_curl_messages();
1178 }
1179#endif
1180 while (slot != NULL && slot->in_use)
1182 slot = slot->next;
1183 if (slot == NULL) {
1185 newslot = xmalloc(sizeof(*newslot));
1186 newslot->curl = NULL;
1187 newslot->in_use = 0;
1188 newslot->next = NULL;
1189 slot = active_queue_head;
1191 if (slot == NULL) {
1192 active_queue_head = newslot;
1193 } else {
1194 while (slot->next != NULL)
1195 slot = slot->next;
1196 slot->next = newslot;
1197 }
1198 slot = newslot;
1199 }
1200 if (slot->curl == NULL) {
1202#ifdef NO_CURL_EASY_DUPHANDLE
1203 slot->curl = get_curl_handle();
1204#else
1205 slot->curl = curl_easy_duphandle(curl_default);
1206#endif
1207 curl_session_count++;
1208 }
1209 active_requests++;
1211 slot->in_use = 1;
1212 slot->results = NULL;
1213 slot->finished = NULL;
1214 slot->callback_data = NULL;
1215 slot->callback_func = NULL;
1216 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1217 if (curl_save_cookies)
1218 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1219 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1220 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1221 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1222 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1223 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1224 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1225 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1226 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1227 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1228 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1229 /*
1231 * Default following to off unless "ALWAYS" is configured; this gives
1232 * callers a sane starting point, and they can tweak for individual
1233 * HTTP_FOLLOW_* cases themselves.
1234 */
1235 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1236 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1237 else
1238 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1239#if LIBCURL_VERSION_NUM >= 0x070a08
1241 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1242#endif
1243#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1244 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1245#endif
1246 if (http_auth.password || curl_empty_auth_enabled())
1247 init_curl_http_auth(slot->curl);
1248 return slot;
1250}
1251int start_active_slot(struct active_request_slot *slot)
1253{
1254#ifdef USE_CURL_MULTI
1255 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1256 int num_transfers;
1257 if (curlm_result != CURLM_OK &&
1259 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1260 warning("curl_multi_add_handle failed: %s",
1261 curl_multi_strerror(curlm_result));
1262 active_requests--;
1263 slot->in_use = 0;
1264 return 0;
1265 }
1266 /*
1268 * We know there must be something to do, since we just added
1269 * something.
1270 */
1271 curl_multi_perform(curlm, &num_transfers);
1272#endif
1273 return 1;
1274}
1275#ifdef USE_CURL_MULTI
1277struct fill_chain {
1278 void *data;
1279 int (*fill)(void *);
1280 struct fill_chain *next;
1281};
1282static struct fill_chain *fill_cfg;
1284void add_fill_function(void *data, int (*fill)(void *))
1286{
1287 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1288 struct fill_chain **linkp = &fill_cfg;
1289 new_fill->data = data;
1290 new_fill->fill = fill;
1291 new_fill->next = NULL;
1292 while (*linkp)
1293 linkp = &(*linkp)->next;
1294 *linkp = new_fill;
1295}
1296void fill_active_slots(void)
1298{
1299 struct active_request_slot *slot = active_queue_head;
1300 while (active_requests < max_requests) {
1302 struct fill_chain *fill;
1303 for (fill = fill_cfg; fill; fill = fill->next)
1304 if (fill->fill(fill->data))
1305 break;
1306 if (!fill)
1308 break;
1309 }
1310 while (slot != NULL) {
1312 if (!slot->in_use && slot->curl != NULL
1313 && curl_session_count > min_curl_sessions) {
1314 curl_easy_cleanup(slot->curl);
1315 slot->curl = NULL;
1316 curl_session_count--;
1317 }
1318 slot = slot->next;
1319 }
1320}
1321void step_active_slots(void)
1323{
1324 int num_transfers;
1325 CURLMcode curlm_result;
1326 do {
1328 curlm_result = curl_multi_perform(curlm, &num_transfers);
1329 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1330 if (num_transfers < active_requests) {
1331 process_curl_messages();
1332 fill_active_slots();
1333 }
1334}
1335#endif
1336void run_active_slot(struct active_request_slot *slot)
1338{
1339#ifdef USE_CURL_MULTI
1340 fd_set readfds;
1341 fd_set writefds;
1342 fd_set excfds;
1343 int max_fd;
1344 struct timeval select_timeout;
1345 int finished = 0;
1346 slot->finished = &finished;
1348 while (!finished) {
1349 step_active_slots();
1350 if (slot->in_use) {
1352#if LIBCURL_VERSION_NUM >= 0x070f04
1353 long curl_timeout;
1354 curl_multi_timeout(curlm, &curl_timeout);
1355 if (curl_timeout == 0) {
1356 continue;
1357 } else if (curl_timeout == -1) {
1358 select_timeout.tv_sec = 0;
1359 select_timeout.tv_usec = 50000;
1360 } else {
1361 select_timeout.tv_sec = curl_timeout / 1000;
1362 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1363 }
1364#else
1365 select_timeout.tv_sec = 0;
1366 select_timeout.tv_usec = 50000;
1367#endif
1368 max_fd = -1;
1370 FD_ZERO(&readfds);
1371 FD_ZERO(&writefds);
1372 FD_ZERO(&excfds);
1373 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1374 /*
1376 * It can happen that curl_multi_timeout returns a pathologically
1377 * long timeout when curl_multi_fdset returns no file descriptors
1378 * to read. See commit message for more details.
1379 */
1380 if (max_fd < 0 &&
1381 (select_timeout.tv_sec > 0 ||
1382 select_timeout.tv_usec > 50000)) {
1383 select_timeout.tv_sec = 0;
1384 select_timeout.tv_usec = 50000;
1385 }
1386 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1388 }
1389 }
1390#else
1391 while (slot->in_use) {
1392 slot->curl_result = curl_easy_perform(slot->curl);
1393 finish_active_slot(slot);
1394 }
1395#endif
1396}
1397static void release_active_slot(struct active_request_slot *slot)
1399{
1400 closedown_active_slot(slot);
1401 if (slot->curl) {
1402 xmulti_remove_handle(slot);
1403 if (curl_session_count > min_curl_sessions) {
1404 curl_easy_cleanup(slot->curl);
1405 slot->curl = NULL;
1406 curl_session_count--;
1407 }
1408 }
1409#ifdef USE_CURL_MULTI
1410 fill_active_slots();
1411#endif
1412}
1413void finish_all_active_slots(void)
1415{
1416 struct active_request_slot *slot = active_queue_head;
1417 while (slot != NULL)
1419 if (slot->in_use) {
1420 run_active_slot(slot);
1421 slot = active_queue_head;
1422 } else {
1423 slot = slot->next;
1424 }
1425}
1426/* Helpers for modifying and creating URLs */
1428static inline int needs_quote(int ch)
1429{
1430 if (((ch >= 'A') && (ch <= 'Z'))
1431 || ((ch >= 'a') && (ch <= 'z'))
1432 || ((ch >= '0') && (ch <= '9'))
1433 || (ch == '/')
1434 || (ch == '-')
1435 || (ch == '.'))
1436 return 0;
1437 return 1;
1438}
1439static char *quote_ref_url(const char *base, const char *ref)
1441{
1442 struct strbuf buf = STRBUF_INIT;
1443 const char *cp;
1444 int ch;
1445 end_url_with_slash(&buf, base);
1447 for (cp = ref; (ch = *cp) != 0; cp++)
1449 if (needs_quote(ch))
1450 strbuf_addf(&buf, "%%%02x", ch);
1451 else
1452 strbuf_addch(&buf, *cp);
1453 return strbuf_detach(&buf, NULL);
1455}
1456void append_remote_object_url(struct strbuf *buf, const char *url,
1458 const char *hex,
1459 int only_two_digit_prefix)
1460{
1461 end_url_with_slash(buf, url);
1462 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1464 if (!only_two_digit_prefix)
1465 strbuf_addstr(buf, hex + 2);
1466}
1467char *get_remote_object_url(const char *url, const char *hex,
1469 int only_two_digit_prefix)
1470{
1471 struct strbuf buf = STRBUF_INIT;
1472 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1473 return strbuf_detach(&buf, NULL);
1474}
1475static int handle_curl_result(struct slot_results *results)
1477{
1478 /*
1479 * If we see a failing http code with CURLE_OK, we have turned off
1480 * FAILONERROR (to keep the server's custom error response), and should
1481 * translate the code into failure here.
1482 *
1483 * Likewise, if we see a redirect (30x code), that means we turned off
1484 * redirect-following, and we should treat the result as an error.
1485 */
1486 if (results->curl_result == CURLE_OK &&
1487 results->http_code >= 300) {
1488 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1489 /*
1490 * Normally curl will already have put the "reason phrase"
1491 * from the server into curl_errorstr; unfortunately without
1492 * FAILONERROR it is lost, so we can give only the numeric
1493 * status code.
1494 */
1495 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1496 "The requested URL returned error: %ld",
1497 results->http_code);
1498 }
1499 if (results->curl_result == CURLE_OK) {
1501 credential_approve(&http_auth);
1502 if (proxy_auth.password)
1503 credential_approve(&proxy_auth);
1504 return HTTP_OK;
1505 } else if (missing_target(results))
1506 return HTTP_MISSING_TARGET;
1507 else if (results->http_code == 401) {
1508 if (http_auth.username && http_auth.password) {
1509 credential_reject(&http_auth);
1510 return HTTP_NOAUTH;
1511 } else {
1512#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1513 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1514 if (results->auth_avail) {
1515 http_auth_methods &= results->auth_avail;
1516 http_auth_methods_restricted = 1;
1517 }
1518#endif
1519 return HTTP_REAUTH;
1520 }
1521 } else {
1522 if (results->http_connectcode == 407)
1523 credential_reject(&proxy_auth);
1524#if LIBCURL_VERSION_NUM >= 0x070c00
1525 if (!curl_errorstr[0])
1526 strlcpy(curl_errorstr,
1527 curl_easy_strerror(results->curl_result),
1528 sizeof(curl_errorstr));
1529#endif
1530 return HTTP_ERROR;
1531 }
1532}
1533int run_one_slot(struct active_request_slot *slot,
1535 struct slot_results *results)
1536{
1537 slot->results = results;
1538 if (!start_active_slot(slot)) {
1539 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1540 "failed to start HTTP request");
1541 return HTTP_START_FAILED;
1542 }
1543 run_active_slot(slot);
1545 return handle_curl_result(results);
1546}
1547struct curl_slist *http_copy_default_headers(void)
1549{
1550 struct curl_slist *headers = NULL, *h;
1551 for (h = extra_http_headers; h; h = h->next)
1553 headers = curl_slist_append(headers, h->data);
1554 return headers;
1556}
1557static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1559{
1560 char *ptr;
1561 CURLcode ret;
1562 strbuf_reset(buf);
1564 ret = curl_easy_getinfo(curl, info, &ptr);
1565 if (!ret && ptr)
1566 strbuf_addstr(buf, ptr);
1567 return ret;
1568}
1569/*
1571 * Check for and extract a content-type parameter. "raw"
1572 * should be positioned at the start of the potential
1573 * parameter, with any whitespace already removed.
1574 *
1575 * "name" is the name of the parameter. The value is appended
1576 * to "out".
1577 */
1578static int extract_param(const char *raw, const char *name,
1579 struct strbuf *out)
1580{
1581 size_t len = strlen(name);
1582 if (strncasecmp(raw, name, len))
1584 return -1;
1585 raw += len;
1586 if (*raw != '=')
1588 return -1;
1589 raw++;
1590 while (*raw && !isspace(*raw) && *raw != ';')
1592 strbuf_addch(out, *raw++);
1593 return 0;
1594}
1595/*
1597 * Extract a normalized version of the content type, with any
1598 * spaces suppressed, all letters lowercased, and no trailing ";"
1599 * or parameters.
1600 *
1601 * Note that we will silently remove even invalid whitespace. For
1602 * example, "text / plain" is specifically forbidden by RFC 2616,
1603 * but "text/plain" is the only reasonable output, and this keeps
1604 * our code simple.
1605 *
1606 * If the "charset" argument is not NULL, store the value of any
1607 * charset parameter there.
1608 *
1609 * Example:
1610 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1611 * "text / plain" -> "text/plain"
1612 */
1613static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1614 struct strbuf *charset)
1615{
1616 const char *p;
1617 strbuf_reset(type);
1619 strbuf_grow(type, raw->len);
1620 for (p = raw->buf; *p; p++) {
1621 if (isspace(*p))
1622 continue;
1623 if (*p == ';') {
1624 p++;
1625 break;
1626 }
1627 strbuf_addch(type, tolower(*p));
1628 }
1629 if (!charset)
1631 return;
1632 strbuf_reset(charset);
1634 while (*p) {
1635 while (isspace(*p) || *p == ';')
1636 p++;
1637 if (!extract_param(p, "charset", charset))
1638 return;
1639 while (*p && !isspace(*p))
1640 p++;
1641 }
1642 if (!charset->len && starts_with(type->buf, "text/"))
1644 strbuf_addstr(charset, "ISO-8859-1");
1645}
1646static void write_accept_language(struct strbuf *buf)
1648{
1649 /*
1650 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1651 * that, q-value will be smaller than 0.001, the minimum q-value the
1652 * HTTP specification allows. See
1653 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1654 */
1655 const int MAX_DECIMAL_PLACES = 3;
1656 const int MAX_LANGUAGE_TAGS = 1000;
1657 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1658 char **language_tags = NULL;
1659 int num_langs = 0;
1660 const char *s = get_preferred_languages();
1661 int i;
1662 struct strbuf tag = STRBUF_INIT;
1663 /* Don't add Accept-Language header if no language is preferred. */
1665 if (!s)
1666 return;
1667 /*
1669 * Split the colon-separated string of preferred languages into
1670 * language_tags array.
1671 */
1672 do {
1673 /* collect language tag */
1674 for (; *s && (isalnum(*s) || *s == '_'); s++)
1675 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1676 /* skip .codeset, @modifier and any other unnecessary parts */
1678 while (*s && *s != ':')
1679 s++;
1680 if (tag.len) {
1682 num_langs++;
1683 REALLOC_ARRAY(language_tags, num_langs);
1684 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1685 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1686 break;
1687 }
1688 } while (*s++);
1689 /* write Accept-Language header into buf */
1691 if (num_langs) {
1692 int last_buf_len = 0;
1693 int max_q;
1694 int decimal_places;
1695 char q_format[32];
1696 /* add '*' */
1698 REALLOC_ARRAY(language_tags, num_langs + 1);
1699 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1700 /* compute decimal_places */
1702 for (max_q = 1, decimal_places = 0;
1703 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1704 decimal_places++, max_q *= 10)
1705 ;
1706 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1708 strbuf_addstr(buf, "Accept-Language: ");
1710 for (i = 0; i < num_langs; i++) {
1712 if (i > 0)
1713 strbuf_addstr(buf, ", ");
1714 strbuf_addstr(buf, language_tags[i]);
1716 if (i > 0)
1718 strbuf_addf(buf, q_format, max_q - i);
1719 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1721 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1722 break;
1723 }
1724 last_buf_len = buf->len;
1726 }
1727 }
1728 /* free language tags -- last one is a static '*' */
1730 for (i = 0; i < num_langs - 1; i++)
1731 free(language_tags[i]);
1732 free(language_tags);
1733}
1734/*
1736 * Get an Accept-Language header which indicates user's preferred languages.
1737 *
1738 * Examples:
1739 * LANGUAGE= -> ""
1740 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1741 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1742 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1743 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1744 * LANGUAGE= LANG=C -> ""
1745 */
1746static const char *get_accept_language(void)
1747{
1748 if (!cached_accept_language) {
1749 struct strbuf buf = STRBUF_INIT;
1750 write_accept_language(&buf);
1751 if (buf.len > 0)
1752 cached_accept_language = strbuf_detach(&buf, NULL);
1753 }
1754 return cached_accept_language;
1756}
1757static void http_opt_request_remainder(CURL *curl, off_t pos)
1759{
1760 char buf[128];
1761 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1762 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1763}
1764/* http_request() targets */
1766#define HTTP_REQUEST_STRBUF 0
1767#define HTTP_REQUEST_FILE 1
1768static int http_request(const char *url,
1770 void *result, int target,
1771 const struct http_get_options *options)
1772{
1773 struct active_request_slot *slot;
1774 struct slot_results results;
1775 struct curl_slist *headers = http_copy_default_headers();
1776 struct strbuf buf = STRBUF_INIT;
1777 const char *accept_language;
1778 int ret;
1779 slot = get_active_slot();
1781 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1782 if (result == NULL) {
1784 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1785 } else {
1786 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1787 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1788 if (target == HTTP_REQUEST_FILE) {
1790 off_t posn = ftello(result);
1791 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1792 fwrite);
1793 if (posn > 0)
1794 http_opt_request_remainder(slot->curl, posn);
1795 } else
1796 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1797 fwrite_buffer);
1798 }
1799 accept_language = get_accept_language();
1801 if (accept_language)
1803 headers = curl_slist_append(headers, accept_language);
1804 strbuf_addstr(&buf, "Pragma:");
1806 if (options && options->no_cache)
1807 strbuf_addstr(&buf, " no-cache");
1808 if (options && options->keep_error)
1809 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1810 if (options && options->initial_request &&
1811 http_follow_config == HTTP_FOLLOW_INITIAL)
1812 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1813 headers = curl_slist_append(headers, buf.buf);
1815 /* Add additional headers here */
1817 if (options && options->extra_headers) {
1818 const struct string_list_item *item;
1819 for_each_string_list_item(item, options->extra_headers) {
1820 headers = curl_slist_append(headers, item->string);
1821 }
1822 }
1823 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1825 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1826 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1827 ret = run_one_slot(slot, &results);
1829 if (options && options->content_type) {
1831 struct strbuf raw = STRBUF_INIT;
1832 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1833 extract_content_type(&raw, options->content_type,
1834 options->charset);
1835 strbuf_release(&raw);
1836 }
1837 if (options && options->effective_url)
1839 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1840 options->effective_url);
1841 curl_slist_free_all(headers);
1843 strbuf_release(&buf);
1844 return ret;
1846}
1847/*
1849 * Update the "base" url to a more appropriate value, as deduced by
1850 * redirects seen when requesting a URL starting with "url".
1851 *
1852 * The "asked" parameter is a URL that we asked curl to access, and must begin
1853 * with "base".
1854 *
1855 * The "got" parameter is the URL that curl reported to us as where we ended
1856 * up.
1857 *
1858 * Returns 1 if we updated the base url, 0 otherwise.
1859 *
1860 * Our basic strategy is to compare "base" and "asked" to find the bits
1861 * specific to our request. We then strip those bits off of "got" to yield the
1862 * new base. So for example, if our base is "http://example.com/foo.git",
1863 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1864 * with "https://other.example.com/foo.git/info/refs". We would want the
1865 * new URL to become "https://other.example.com/foo.git".
1866 *
1867 * Note that this assumes a sane redirect scheme. It's entirely possible
1868 * in the example above to end up at a URL that does not even end in
1869 * "info/refs". In such a case we die. There's not much we can do, such a
1870 * scheme is unlikely to represent a real git repository, and failing to
1871 * rewrite the base opens options for malicious redirects to do funny things.
1872 */
1873static int update_url_from_redirect(struct strbuf *base,
1874 const char *asked,
1875 const struct strbuf *got)
1876{
1877 const char *tail;
1878 size_t new_len;
1879 if (!strcmp(asked, got->buf))
1881 return 0;
1882 if (!skip_prefix(asked, base->buf, &tail))
1884 BUG("update_url_from_redirect: %s is not a superset of %s",
1885 asked, base->buf);
1886 new_len = got->len;
1888 if (!strip_suffix_mem(got->buf, &new_len, tail))
1889 die(_("unable to update url base from redirection:\n"
1890 " asked for: %s\n"
1891 " redirect: %s"),
1892 asked, got->buf);
1893 strbuf_reset(base);
1895 strbuf_add(base, got->buf, new_len);
1896 return 1;
1898}
1899static int http_request_reauth(const char *url,
1901 void *result, int target,
1902 struct http_get_options *options)
1903{
1904 int ret = http_request(url, result, target, options);
1905 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1907 return ret;
1908 if (options && options->effective_url && options->base_url) {
1910 if (update_url_from_redirect(options->base_url,
1911 url, options->effective_url)) {
1912 credential_from_url(&http_auth, options->base_url->buf);
1913 url = options->effective_url->buf;
1914 }
1915 }
1916 if (ret != HTTP_REAUTH)
1918 return ret;
1919 /*
1921 * If we are using KEEP_ERROR, the previous request may have
1922 * put cruft into our output stream; we should clear it out before
1923 * making our next request. We only know how to do this for
1924 * the strbuf case, but that is enough to satisfy current callers.
1925 */
1926 if (options && options->keep_error) {
1927 switch (target) {
1928 case HTTP_REQUEST_STRBUF:
1929 strbuf_reset(result);
1930 break;
1931 default:
1932 BUG("HTTP_KEEP_ERROR is only supported with strbufs");
1933 }
1934 }
1935 credential_fill(&http_auth);
1937 return http_request(url, result, target, options);
1939}
1940int http_get_strbuf(const char *url,
1942 struct strbuf *result,
1943 struct http_get_options *options)
1944{
1945 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1946}
1947/*
1949 * Downloads a URL and stores the result in the given file.
1950 *
1951 * If a previous interrupted download is detected (i.e. a previous temporary
1952 * file is still around) the download is resumed.
1953 */
1954static int http_get_file(const char *url, const char *filename,
1955 struct http_get_options *options)
1956{
1957 int ret;
1958 struct strbuf tmpfile = STRBUF_INIT;
1959 FILE *result;
1960 strbuf_addf(&tmpfile, "%s.temp", filename);
1962 result = fopen(tmpfile.buf, "a");
1963 if (!result) {
1964 error("Unable to open local file %s", tmpfile.buf);
1965 ret = HTTP_ERROR;
1966 goto cleanup;
1967 }
1968 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1970 fclose(result);
1971 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1973 ret = HTTP_ERROR;
1974cleanup:
1975 strbuf_release(&tmpfile);
1976 return ret;
1977}
1978int http_fetch_ref(const char *base, struct ref *ref)
1980{
1981 struct http_get_options options = {0};
1982 char *url;
1983 struct strbuf buffer = STRBUF_INIT;
1984 int ret = -1;
1985 options.no_cache = 1;
1987 url = quote_ref_url(base, ref->name);
1989 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1990 strbuf_rtrim(&buffer);
1991 if (buffer.len == 40)
1992 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1993 else if (starts_with(buffer.buf, "ref: ")) {
1994 ref->symref = xstrdup(buffer.buf + 5);
1995 ret = 0;
1996 }
1997 }
1998 strbuf_release(&buffer);
2000 free(url);
2001 return ret;
2002}
2003/* Helpers for fetching packs */
2005static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
2006{
2007 char *url, *tmp;
2008 struct strbuf buf = STRBUF_INIT;
2009 if (http_is_verbose)
2011 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
2012 end_url_with_slash(&buf, base_url);
2014 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
2015 url = strbuf_detach(&buf, NULL);
2016 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
2018 tmp = strbuf_detach(&buf, NULL);
2019 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
2021 error("Unable to get pack index %s", url);
2022 FREE_AND_NULL(tmp);
2023 }
2024 free(url);
2026 return tmp;
2027}
2028static int fetch_and_setup_pack_index(struct packed_git **packs_head,
2030 unsigned char *sha1, const char *base_url)
2031{
2032 struct packed_git *new_pack;
2033 char *tmp_idx = NULL;
2034 int ret;
2035 if (has_pack_index(sha1)) {
2037 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2038 if (!new_pack)
2039 return -1; /* parse_pack_index() already issued error message */
2040 goto add_pack;
2041 }
2042 tmp_idx = fetch_pack_index(sha1, base_url);
2044 if (!tmp_idx)
2045 return -1;
2046 new_pack = parse_pack_index(sha1, tmp_idx);
2048 if (!new_pack) {
2049 unlink(tmp_idx);
2050 free(tmp_idx);
2051 return -1; /* parse_pack_index() already issued error message */
2053 }
2054 ret = verify_pack_index(new_pack);
2056 if (!ret) {
2057 close_pack_index(new_pack);
2058 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2059 }
2060 free(tmp_idx);
2061 if (ret)
2062 return -1;
2063add_pack:
2065 new_pack->next = *packs_head;
2066 *packs_head = new_pack;
2067 return 0;
2068}
2069int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2071{
2072 struct http_get_options options = {0};
2073 int ret = 0, i = 0;
2074 char *url, *data;
2075 struct strbuf buf = STRBUF_INIT;
2076 unsigned char hash[GIT_MAX_RAWSZ];
2077 const unsigned hexsz = the_hash_algo->hexsz;
2078 end_url_with_slash(&buf, base_url);
2080 strbuf_addstr(&buf, "objects/info/packs");
2081 url = strbuf_detach(&buf, NULL);
2082 options.no_cache = 1;
2084 ret = http_get_strbuf(url, &buf, &options);
2085 if (ret != HTTP_OK)
2086 goto cleanup;
2087 data = buf.buf;
2089 while (i < buf.len) {
2090 switch (data[i]) {
2091 case 'P':
2092 i++;
2093 if (i + hexsz + 12 <= buf.len &&
2094 starts_with(data + i, " pack-") &&
2095 starts_with(data + i + hexsz + 6, ".pack\n")) {
2096 get_sha1_hex(data + i + 6, hash);
2097 fetch_and_setup_pack_index(packs_head, hash,
2098 base_url);
2099 i += hexsz + 11;
2100 break;
2101 }
2102 default:
2103 while (i < buf.len && data[i] != '\n')
2104 i++;
2105 }
2106 i++;
2107 }
2108cleanup:
2110 free(url);
2111 return ret;
2112}
2113void release_http_pack_request(struct http_pack_request *preq)
2115{
2116 if (preq->packfile != NULL) {
2117 fclose(preq->packfile);
2118 preq->packfile = NULL;
2119 }
2120 preq->slot = NULL;
2121 strbuf_release(&preq->tmpfile);
2122 free(preq->url);
2123 free(preq);
2124}
2125int finish_http_pack_request(struct http_pack_request *preq)
2127{
2128 struct packed_git **lst;
2129 struct packed_git *p = preq->target;
2130 char *tmp_idx;
2131 size_t len;
2132 struct child_process ip = CHILD_PROCESS_INIT;
2133 close_pack_index(p);
2135 fclose(preq->packfile);
2137 preq->packfile = NULL;
2138 lst = preq->lst;
2140 while (*lst != p)
2141 lst = &((*lst)->next);
2142 *lst = (*lst)->next;
2143 if (!strip_suffix(preq->tmpfile.buf, ".pack.temp", &len))
2145 BUG("pack tmpfile does not end in .pack.temp?");
2146 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile.buf);
2147 argv_array_push(&ip.args, "index-pack");
2149 argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
2150 argv_array_push(&ip.args, preq->tmpfile.buf);
2151 ip.git_cmd = 1;
2152 ip.no_stdin = 1;
2153 ip.no_stdout = 1;
2154 if (run_command(&ip)) {
2156 unlink(preq->tmpfile.buf);
2157 unlink(tmp_idx);
2158 free(tmp_idx);
2159 return -1;
2160 }
2161 unlink(sha1_pack_index_name(p->sha1));
2163 if (finalize_object_file(preq->tmpfile.buf, sha1_pack_name(p->sha1))
2165 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2166 free(tmp_idx);
2167 return -1;
2168 }
2169 install_packed_git(the_repository, p);
2171 free(tmp_idx);
2172 return 0;
2173}
2174struct http_pack_request *new_http_pack_request(
2176 struct packed_git *target, const char *base_url)
2177{
2178 off_t prev_posn = 0;
2179 struct strbuf buf = STRBUF_INIT;
2180 struct http_pack_request *preq;
2181 preq = xcalloc(1, sizeof(*preq));
2183 strbuf_init(&preq->tmpfile, 0);
2184 preq->target = target;
2185 end_url_with_slash(&buf, base_url);
2187 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2188 sha1_to_hex(target->sha1));
2189 preq->url = strbuf_detach(&buf, NULL);
2190 strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(target->sha1));
2192 preq->packfile = fopen(preq->tmpfile.buf, "a");
2193 if (!preq->packfile) {
2194 error("Unable to open local file %s for pack",
2195 preq->tmpfile.buf);
2196 goto abort;
2197 }
2198 preq->slot = get_active_slot();
2200 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2201 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2202 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2203 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2204 no_pragma_header);
2205 /*
2207 * If there is data present from a previous transfer attempt,
2208 * resume where it left off
2209 */
2210 prev_posn = ftello(preq->packfile);
2211 if (prev_posn>0) {
2212 if (http_is_verbose)
2213 fprintf(stderr,
2214 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2215 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2216 http_opt_request_remainder(preq->slot->curl, prev_posn);
2217 }
2218 return preq;
2220abort:
2222 strbuf_release(&preq->tmpfile);
2223 free(preq->url);
2224 free(preq);
2225 return NULL;
2226}
2227/* Helpers for fetching objects (loose) */
2229static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2230 void *data)
2231{
2232 unsigned char expn[4096];
2233 size_t size = eltsize * nmemb;
2234 int posn = 0;
2235 struct http_object_request *freq = data;
2236 struct active_request_slot *slot = freq->slot;
2237 if (slot) {
2239 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2240 &slot->http_code);
2241 if (c != CURLE_OK)
2242 BUG("curl_easy_getinfo for HTTP code failed: %s",
2243 curl_easy_strerror(c));
2244 if (slot->http_code >= 300)
2245 return size;
2246 }
2247 do {
2249 ssize_t retval = xwrite(freq->localfile,
2250 (char *) ptr + posn, size - posn);
2251 if (retval < 0)
2252 return posn;
2253 posn += retval;
2254 } while (posn < size);
2255 freq->stream.avail_in = size;
2257 freq->stream.next_in = (void *)ptr;
2258 do {
2259 freq->stream.next_out = expn;
2260 freq->stream.avail_out = sizeof(expn);
2261 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2262 git_SHA1_Update(&freq->c, expn,
2263 sizeof(expn) - freq->stream.avail_out);
2264 } while (freq->stream.avail_in && freq->zret == Z_OK);
2265 return size;
2266}
2267struct http_object_request *new_http_object_request(const char *base_url,
2269 unsigned char *sha1)
2270{
2271 char *hex = sha1_to_hex(sha1);
2272 struct strbuf filename = STRBUF_INIT;
2273 struct strbuf prevfile = STRBUF_INIT;
2274 int prevlocal;
2275 char prev_buf[PREV_BUF_SIZE];
2276 ssize_t prev_read = 0;
2277 off_t prev_posn = 0;
2278 struct http_object_request *freq;
2279 freq = xcalloc(1, sizeof(*freq));
2281 strbuf_init(&freq->tmpfile, 0);
2282 hashcpy(freq->sha1, sha1);
2283 freq->localfile = -1;
2284 sha1_file_name(the_repository, &filename, sha1);
2286 strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
2287 strbuf_addf(&prevfile, "%s.prev", filename.buf);
2289 unlink_or_warn(prevfile.buf);
2290 rename(freq->tmpfile.buf, prevfile.buf);
2291 unlink_or_warn(freq->tmpfile.buf);
2292 strbuf_release(&filename);
2293 if (freq->localfile != -1)
2295 error("fd leakage in start: %d", freq->localfile);
2296 freq->localfile = open(freq->tmpfile.buf,
2297 O_WRONLY | O_CREAT | O_EXCL, 0666);
2298 /*
2299 * This could have failed due to the "lazy directory creation";
2300 * try to mkdir the last path component.
2301 */
2302 if (freq->localfile < 0 && errno == ENOENT) {
2303 char *dir = strrchr(freq->tmpfile.buf, '/');
2304 if (dir) {
2305 *dir = 0;
2306 mkdir(freq->tmpfile.buf, 0777);
2307 *dir = '/';
2308 }
2309 freq->localfile = open(freq->tmpfile.buf,
2310 O_WRONLY | O_CREAT | O_EXCL, 0666);
2311 }
2312 if (freq->localfile < 0) {
2314 error_errno("Couldn't create temporary file %s",
2315 freq->tmpfile.buf);
2316 goto abort;
2317 }
2318 git_inflate_init(&freq->stream);
2320 git_SHA1_Init(&freq->c);
2322 freq->url = get_remote_object_url(base_url, hex, 0);
2324 /*
2326 * If a previous temp file is present, process what was already
2327 * fetched.
2328 */
2329 prevlocal = open(prevfile.buf, O_RDONLY);
2330 if (prevlocal != -1) {
2331 do {
2332 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2333 if (prev_read>0) {
2334 if (fwrite_sha1_file(prev_buf,
2335 1,
2336 prev_read,
2337 freq) == prev_read) {
2338 prev_posn += prev_read;
2339 } else {
2340 prev_read = -1;
2341 }
2342 }
2343 } while (prev_read > 0);
2344 close(prevlocal);
2345 }
2346 unlink_or_warn(prevfile.buf);
2347 strbuf_release(&prevfile);
2348 /*
2350 * Reset inflate/SHA1 if there was an error reading the previous temp
2351 * file; also rewind to the beginning of the local file.
2352 */
2353 if (prev_read == -1) {
2354 memset(&freq->stream, 0, sizeof(freq->stream));
2355 git_inflate_init(&freq->stream);
2356 git_SHA1_Init(&freq->c);
2357 if (prev_posn>0) {
2358 prev_posn = 0;
2359 lseek(freq->localfile, 0, SEEK_SET);
2360 if (ftruncate(freq->localfile, 0) < 0) {
2361 error_errno("Couldn't truncate temporary file %s",
2362 freq->tmpfile.buf);
2363 goto abort;
2364 }
2365 }
2366 }
2367 freq->slot = get_active_slot();
2369 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2371 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2372 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2373 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2374 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2375 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2376 /*
2378 * If we have successfully processed data from a previous fetch
2379 * attempt, only fetch the data we don't already have.
2380 */
2381 if (prev_posn>0) {
2382 if (http_is_verbose)
2383 fprintf(stderr,
2384 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2385 hex, (uintmax_t)prev_posn);
2386 http_opt_request_remainder(freq->slot->curl, prev_posn);
2387 }
2388 return freq;
2390abort:
2392 strbuf_release(&prevfile);
2393 free(freq->url);
2394 free(freq);
2395 return NULL;
2396}
2397void process_http_object_request(struct http_object_request *freq)
2399{
2400 if (freq->slot == NULL)
2401 return;
2402 freq->curl_result = freq->slot->curl_result;
2403 freq->http_code = freq->slot->http_code;
2404 freq->slot = NULL;
2405}
2406int finish_http_object_request(struct http_object_request *freq)
2408{
2409 struct stat st;
2410 struct strbuf filename = STRBUF_INIT;
2411 close(freq->localfile);
2413 freq->localfile = -1;
2414 process_http_object_request(freq);
2416 if (freq->http_code == 416) {
2418 warning("requested range invalid; we may already have all the data.");
2419 } else if (freq->curl_result != CURLE_OK) {
2420 if (stat(freq->tmpfile.buf, &st) == 0)
2421 if (st.st_size == 0)
2422 unlink_or_warn(freq->tmpfile.buf);
2423 return -1;
2424 }
2425 git_inflate_end(&freq->stream);
2427 git_SHA1_Final(freq->real_sha1, &freq->c);
2428 if (freq->zret != Z_STREAM_END) {
2429 unlink_or_warn(freq->tmpfile.buf);
2430 return -1;
2431 }
2432 if (hashcmp(freq->sha1, freq->real_sha1)) {
2433 unlink_or_warn(freq->tmpfile.buf);
2434 return -1;
2435 }
2436 sha1_file_name(the_repository, &filename, freq->sha1);
2437 freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
2438 strbuf_release(&filename);
2439 return freq->rename;
2441}
2442void abort_http_object_request(struct http_object_request *freq)
2444{
2445 unlink_or_warn(freq->tmpfile.buf);
2446 release_http_object_request(freq);
2448}
2449void release_http_object_request(struct http_object_request *freq)
2451{
2452 if (freq->localfile != -1) {
2453 close(freq->localfile);
2454 freq->localfile = -1;
2455 }
2456 FREE_AND_NULL(freq->url);
2457 if (freq->slot != NULL) {
2458 freq->slot->callback_func = NULL;
2459 freq->slot->callback_data = NULL;
2460 release_active_slot(freq->slot);
2461 freq->slot = NULL;
2462 }
2463 strbuf_release(&freq->tmpfile);
2464}