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"
17static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
19static int trace_curl_data = 1;
20static struct string_list cookies_to_redact = STRING_LIST_INIT_DUP;
21#if LIBCURL_VERSION_NUM >= 0x070a08
22long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
23#else
24long int git_curl_ipresolve;
25#endif
26int active_requests;
27int http_is_verbose;
28ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
29#if LIBCURL_VERSION_NUM >= 0x070a06
31#define LIBCURL_CAN_HANDLE_AUTH_ANY
32#endif
33static int min_curl_sessions = 1;
35static int curl_session_count;
36#ifdef USE_CURL_MULTI
37static int max_requests = -1;
38static CURLM *curlm;
39#endif
40#ifndef NO_CURL_EASY_DUPHANDLE
41static CURL *curl_default;
42#endif
43#define PREV_BUF_SIZE 4096
45char curl_errorstr[CURL_ERROR_SIZE];
47static int curl_ssl_verify = -1;
49static int curl_ssl_try;
50static const char *ssl_cert;
51static const char *ssl_cipherlist;
52static const char *ssl_version;
53static struct {
54 const char *name;
55 long ssl_version;
56} sslversions[] = {
57 { "sslv2", CURL_SSLVERSION_SSLv2 },
58 { "sslv3", CURL_SSLVERSION_SSLv3 },
59 { "tlsv1", CURL_SSLVERSION_TLSv1 },
60#if LIBCURL_VERSION_NUM >= 0x072200
61 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
62 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
63 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
64#endif
65#if LIBCURL_VERSION_NUM >= 0x073400
66 { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
67#endif
68};
69#if LIBCURL_VERSION_NUM >= 0x070903
70static const char *ssl_key;
71#endif
72#if LIBCURL_VERSION_NUM >= 0x070908
73static const char *ssl_capath;
74#endif
75#if LIBCURL_VERSION_NUM >= 0x071304
76static const char *curl_no_proxy;
77#endif
78#if LIBCURL_VERSION_NUM >= 0x072c00
79static const char *ssl_pinnedkey;
80#endif
81static const char *ssl_cainfo;
82static long curl_low_speed_limit = -1;
83static long curl_low_speed_time = -1;
84static int curl_ftp_no_epsv;
85static const char *curl_http_proxy;
86static const char *http_proxy_authmethod;
87static struct {
88 const char *name;
89 long curlauth_param;
90} proxy_authmethods[] = {
91 { "basic", CURLAUTH_BASIC },
92 { "digest", CURLAUTH_DIGEST },
93 { "negotiate", CURLAUTH_GSSNEGOTIATE },
94 { "ntlm", CURLAUTH_NTLM },
95#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
96 { "anyauth", CURLAUTH_ANY },
97#endif
98 /*
99 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
100 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
101 * here, too
102 */
103};
104#ifdef CURLGSSAPI_DELEGATION_FLAG
105static const char *curl_deleg;
106static struct {
107 const char *name;
108 long curl_deleg_param;
109} curl_deleg_levels[] = {
110 { "none", CURLGSSAPI_DELEGATION_NONE },
111 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
112 { "always", CURLGSSAPI_DELEGATION_FLAG },
113};
114#endif
115static struct credential proxy_auth = CREDENTIAL_INIT;
117static const char *curl_proxyuserpwd;
118static const char *curl_cookie_file;
119static int curl_save_cookies;
120struct credential http_auth = CREDENTIAL_INIT;
121static int http_proactive_auth;
122static const char *user_agent;
123static int curl_empty_auth = -1;
124enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
126#if LIBCURL_VERSION_NUM >= 0x071700
128/* Use CURLOPT_KEYPASSWD as is */
129#elif LIBCURL_VERSION_NUM >= 0x070903
130#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
131#else
132#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
133#endif
134static struct credential cert_auth = CREDENTIAL_INIT;
136static int ssl_cert_password_required;
137#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
138static unsigned long http_auth_methods = CURLAUTH_ANY;
139static int http_auth_methods_restricted;
140/* Modes for which empty_auth cannot actually help us. */
141static unsigned long empty_auth_useless =
142 CURLAUTH_BASIC
143#ifdef CURLAUTH_DIGEST_IE
144 | CURLAUTH_DIGEST_IE
145#endif
146 | CURLAUTH_DIGEST;
147#endif
148static struct curl_slist *pragma_header;
150static struct curl_slist *no_pragma_header;
151static struct curl_slist *extra_http_headers;
152static struct active_request_slot *active_queue_head;
154static char *cached_accept_language;
156size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
158{
159 size_t size = eltsize * nmemb;
160 struct buffer *buffer = buffer_;
161 if (size > buffer->buf.len - buffer->posn)
163 size = buffer->buf.len - buffer->posn;
164 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
165 buffer->posn += size;
166 return size;
168}
169#ifndef NO_CURL_IOCTL
171curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
172{
173 struct buffer *buffer = clientp;
174 switch (cmd) {
176 case CURLIOCMD_NOP:
177 return CURLIOE_OK;
178 case CURLIOCMD_RESTARTREAD:
180 buffer->posn = 0;
181 return CURLIOE_OK;
182 default:
184 return CURLIOE_UNKNOWNCMD;
185 }
186}
187#endif
188size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
190{
191 size_t size = eltsize * nmemb;
192 struct strbuf *buffer = buffer_;
193 strbuf_add(buffer, ptr, size);
195 return size;
196}
197size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
199{
200 return eltsize * nmemb;
201}
202static void closedown_active_slot(struct active_request_slot *slot)
204{
205 active_requests--;
206 slot->in_use = 0;
207}
208static void finish_active_slot(struct active_request_slot *slot)
210{
211 closedown_active_slot(slot);
212 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
213 if (slot->finished != NULL)
215 (*slot->finished) = 1;
216 /* Store slot results so they can be read after the slot is reused */
218 if (slot->results != NULL) {
219 slot->results->curl_result = slot->curl_result;
220 slot->results->http_code = slot->http_code;
221#if LIBCURL_VERSION_NUM >= 0x070a08
222 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
223 &slot->results->auth_avail);
224#else
225 slot->results->auth_avail = 0;
226#endif
227 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
229 &slot->results->http_connectcode);
230 }
231 /* Run callback if appropriate */
233 if (slot->callback_func != NULL)
234 slot->callback_func(slot->callback_data);
235}
236static void xmulti_remove_handle(struct active_request_slot *slot)
238{
239#ifdef USE_CURL_MULTI
240 curl_multi_remove_handle(curlm, slot->curl);
241#endif
242}
243#ifdef USE_CURL_MULTI
245static void process_curl_messages(void)
246{
247 int num_messages;
248 struct active_request_slot *slot;
249 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
250 while (curl_message != NULL) {
252 if (curl_message->msg == CURLMSG_DONE) {
253 int curl_result = curl_message->data.result;
254 slot = active_queue_head;
255 while (slot != NULL &&
256 slot->curl != curl_message->easy_handle)
257 slot = slot->next;
258 if (slot != NULL) {
259 xmulti_remove_handle(slot);
260 slot->curl_result = curl_result;
261 finish_active_slot(slot);
262 } else {
263 fprintf(stderr, "Received DONE message for unknown request!\n");
264 }
265 } else {
266 fprintf(stderr, "Unknown CURL message received: %d\n",
267 (int)curl_message->msg);
268 }
269 curl_message = curl_multi_info_read(curlm, &num_messages);
270 }
271}
272#endif
273static int http_options(const char *var, const char *value, void *cb)
275{
276 if (!strcmp("http.sslverify", var)) {
277 curl_ssl_verify = git_config_bool(var, value);
278 return 0;
279 }
280 if (!strcmp("http.sslcipherlist", var))
281 return git_config_string(&ssl_cipherlist, var, value);
282 if (!strcmp("http.sslversion", var))
283 return git_config_string(&ssl_version, var, value);
284 if (!strcmp("http.sslcert", var))
285 return git_config_pathname(&ssl_cert, var, value);
286#if LIBCURL_VERSION_NUM >= 0x070903
287 if (!strcmp("http.sslkey", var))
288 return git_config_pathname(&ssl_key, var, value);
289#endif
290#if LIBCURL_VERSION_NUM >= 0x070908
291 if (!strcmp("http.sslcapath", var))
292 return git_config_pathname(&ssl_capath, var, value);
293#endif
294 if (!strcmp("http.sslcainfo", var))
295 return git_config_pathname(&ssl_cainfo, var, value);
296 if (!strcmp("http.sslcertpasswordprotected", var)) {
297 ssl_cert_password_required = git_config_bool(var, value);
298 return 0;
299 }
300 if (!strcmp("http.ssltry", var)) {
301 curl_ssl_try = git_config_bool(var, value);
302 return 0;
303 }
304 if (!strcmp("http.minsessions", var)) {
305 min_curl_sessions = git_config_int(var, value);
306#ifndef USE_CURL_MULTI
307 if (min_curl_sessions > 1)
308 min_curl_sessions = 1;
309#endif
310 return 0;
311 }
312#ifdef USE_CURL_MULTI
313 if (!strcmp("http.maxrequests", var)) {
314 max_requests = git_config_int(var, value);
315 return 0;
316 }
317#endif
318 if (!strcmp("http.lowspeedlimit", var)) {
319 curl_low_speed_limit = (long)git_config_int(var, value);
320 return 0;
321 }
322 if (!strcmp("http.lowspeedtime", var)) {
323 curl_low_speed_time = (long)git_config_int(var, value);
324 return 0;
325 }
326 if (!strcmp("http.noepsv", var)) {
328 curl_ftp_no_epsv = git_config_bool(var, value);
329 return 0;
330 }
331 if (!strcmp("http.proxy", var))
332 return git_config_string(&curl_http_proxy, var, value);
333 if (!strcmp("http.proxyauthmethod", var))
335 return git_config_string(&http_proxy_authmethod, var, value);
336 if (!strcmp("http.cookiefile", var))
338 return git_config_pathname(&curl_cookie_file, var, value);
339 if (!strcmp("http.savecookies", var)) {
340 curl_save_cookies = git_config_bool(var, value);
341 return 0;
342 }
343 if (!strcmp("http.postbuffer", var)) {
345 http_post_buffer = git_config_ssize_t(var, value);
346 if (http_post_buffer < 0)
347 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
348 if (http_post_buffer < LARGE_PACKET_MAX)
349 http_post_buffer = LARGE_PACKET_MAX;
350 return 0;
351 }
352 if (!strcmp("http.useragent", var))
354 return git_config_string(&user_agent, var, value);
355 if (!strcmp("http.emptyauth", var)) {
357 if (value && !strcmp("auto", value))
358 curl_empty_auth = -1;
359 else
360 curl_empty_auth = git_config_bool(var, value);
361 return 0;
362 }
363 if (!strcmp("http.delegation", var)) {
365#ifdef CURLGSSAPI_DELEGATION_FLAG
366 return git_config_string(&curl_deleg, var, value);
367#else
368 warning(_("Delegation control is not supported with cURL < 7.22.0"));
369 return 0;
370#endif
371 }
372 if (!strcmp("http.pinnedpubkey", var)) {
374#if LIBCURL_VERSION_NUM >= 0x072c00
375 return git_config_pathname(&ssl_pinnedkey, var, value);
376#else
377 warning(_("Public key pinning not supported with cURL < 7.44.0"));
378 return 0;
379#endif
380 }
381 if (!strcmp("http.extraheader", var)) {
383 if (!value) {
384 return config_error_nonbool(var);
385 } else if (!*value) {
386 curl_slist_free_all(extra_http_headers);
387 extra_http_headers = NULL;
388 } else {
389 extra_http_headers =
390 curl_slist_append(extra_http_headers, value);
391 }
392 return 0;
393 }
394 if (!strcmp("http.followredirects", var)) {
396 if (value && !strcmp(value, "initial"))
397 http_follow_config = HTTP_FOLLOW_INITIAL;
398 else if (git_config_bool(var, value))
399 http_follow_config = HTTP_FOLLOW_ALWAYS;
400 else
401 http_follow_config = HTTP_FOLLOW_NONE;
402 return 0;
403 }
404 /* Fall back on the default ones */
406 return git_default_config(var, value, cb);
407}
408static int curl_empty_auth_enabled(void)
410{
411 if (curl_empty_auth >= 0)
412 return curl_empty_auth;
413#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
415 /*
416 * Our libcurl is too old to do AUTH_ANY in the first place;
417 * just default to turning the feature off.
418 */
419#else
420 /*
421 * In the automatic case, kick in the empty-auth
422 * hack as long as we would potentially try some
423 * method more exotic than "Basic" or "Digest".
424 *
425 * But only do this when this is our second or
426 * subsequent request, as by then we know what
427 * methods are available.
428 */
429 if (http_auth_methods_restricted &&
430 (http_auth_methods & ~empty_auth_useless))
431 return 1;
432#endif
433 return 0;
434}
435static void init_curl_http_auth(CURL *result)
437{
438 if (!http_auth.username || !*http_auth.username) {
439 if (curl_empty_auth_enabled())
440 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
441 return;
442 }
443 credential_fill(&http_auth);
445#if LIBCURL_VERSION_NUM >= 0x071301
447 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
448 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
449#else
450 {
451 static struct strbuf up = STRBUF_INIT;
452 /*
453 * Note that we assume we only ever have a single set of
454 * credentials in a given program run, so we do not have
455 * to worry about updating this buffer, only setting its
456 * initial value.
457 */
458 if (!up.len)
459 strbuf_addf(&up, "%s:%s",
460 http_auth.username, http_auth.password);
461 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
462 }
463#endif
464}
465/* *var must be free-able */
467static void var_override(const char **var, char *value)
468{
469 if (value) {
470 free((void *)*var);
471 *var = xstrdup(value);
472 }
473}
474static void set_proxyauth_name_password(CURL *result)
476{
477#if LIBCURL_VERSION_NUM >= 0x071301
478 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
479 proxy_auth.username);
480 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
481 proxy_auth.password);
482#else
483 struct strbuf s = STRBUF_INIT;
484 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
486 strbuf_addch(&s, ':');
487 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
488 curl_proxyuserpwd = strbuf_detach(&s, NULL);
489 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
490#endif
491}
492static void init_curl_proxy_auth(CURL *result)
494{
495 if (proxy_auth.username) {
496 if (!proxy_auth.password)
497 credential_fill(&proxy_auth);
498 set_proxyauth_name_password(result);
499 }
500 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
502#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
504 if (http_proxy_authmethod) {
505 int i;
506 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
507 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
508 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
509 proxy_authmethods[i].curlauth_param);
510 break;
511 }
512 }
513 if (i == ARRAY_SIZE(proxy_authmethods)) {
514 warning("unsupported proxy authentication method %s: using anyauth",
515 http_proxy_authmethod);
516 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
517 }
518 }
519 else
520 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
521#endif
522}
523static int has_cert_password(void)
525{
526 if (ssl_cert == NULL || ssl_cert_password_required != 1)
527 return 0;
528 if (!cert_auth.password) {
529 cert_auth.protocol = xstrdup("cert");
530 cert_auth.username = xstrdup("");
531 cert_auth.path = xstrdup(ssl_cert);
532 credential_fill(&cert_auth);
533 }
534 return 1;
535}
536#if LIBCURL_VERSION_NUM >= 0x071900
538static void set_curl_keepalive(CURL *c)
539{
540 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
541}
542#elif LIBCURL_VERSION_NUM >= 0x071000
544static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
545{
546 int ka = 1;
547 int rc;
548 socklen_t len = (socklen_t)sizeof(ka);
549 if (type != CURLSOCKTYPE_IPCXN)
551 return 0;
552 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
554 if (rc < 0)
555 warning_errno("unable to set SO_KEEPALIVE on socket");
556 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
558}
559static void set_curl_keepalive(CURL *c)
561{
562 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
563}
564#else
566static void set_curl_keepalive(CURL *c)
567{
568 /* not supported on older curl versions */
569}
570#endif
571static void redact_sensitive_header(struct strbuf *header)
573{
574 const char *sensitive_header;
575 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
577 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
578 /* The first token is the type, which is OK to log */
579 while (isspace(*sensitive_header))
580 sensitive_header++;
581 while (*sensitive_header && !isspace(*sensitive_header))
582 sensitive_header++;
583 /* Everything else is opaque and possibly sensitive */
584 strbuf_setlen(header, sensitive_header - header->buf);
585 strbuf_addstr(header, " <redacted>");
586 } else if (cookies_to_redact.nr &&
587 skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
588 struct strbuf redacted_header = STRBUF_INIT;
589 char *cookie;
590 while (isspace(*sensitive_header))
592 sensitive_header++;
593 /*
595 * The contents of header starting from sensitive_header will
596 * subsequently be overridden, so it is fine to mutate this
597 * string (hence the assignment to "char *").
598 */
599 cookie = (char *) sensitive_header;
600 while (cookie) {
602 char *equals;
603 char *semicolon = strstr(cookie, "; ");
604 if (semicolon)
605 *semicolon = 0;
606 equals = strchrnul(cookie, '=');
607 if (!equals) {
608 /* invalid cookie, just append and continue */
609 strbuf_addstr(&redacted_header, cookie);
610 continue;
611 }
612 *equals = 0; /* temporarily set to NUL for lookup */
613 if (string_list_lookup(&cookies_to_redact, cookie)) {
614 strbuf_addstr(&redacted_header, cookie);
615 strbuf_addstr(&redacted_header, "=<redacted>");
616 } else {
617 *equals = '=';
618 strbuf_addstr(&redacted_header, cookie);
619 }
620 if (semicolon) {
621 /*
622 * There are more cookies. (Or, for some
623 * reason, the input string ends in "; ".)
624 */
625 strbuf_addstr(&redacted_header, "; ");
626 cookie = semicolon + strlen("; ");
627 } else {
628 cookie = NULL;
629 }
630 }
631 strbuf_setlen(header, sensitive_header - header->buf);
633 strbuf_addbuf(header, &redacted_header);
634 }
635}
636static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
638{
639 struct strbuf out = STRBUF_INIT;
640 struct strbuf **headers, **header;
641 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
643 text, (long)size, (long)size);
644 trace_strbuf(&trace_curl, &out);
645 strbuf_reset(&out);
646 strbuf_add(&out, ptr, size);
647 headers = strbuf_split_max(&out, '\n', 0);
648 for (header = headers; *header; header++) {
650 if (hide_sensitive_header)
651 redact_sensitive_header(*header);
652 strbuf_insert((*header), 0, text, strlen(text));
653 strbuf_insert((*header), strlen(text), ": ", 2);
654 strbuf_rtrim((*header));
655 strbuf_addch((*header), '\n');
656 trace_strbuf(&trace_curl, (*header));
657 }
658 strbuf_list_free(headers);
659 strbuf_release(&out);
660}
661static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
663{
664 size_t i;
665 struct strbuf out = STRBUF_INIT;
666 unsigned int width = 60;
667 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
669 text, (long)size, (long)size);
670 trace_strbuf(&trace_curl, &out);
671 for (i = 0; i < size; i += width) {
673 size_t w;
674 strbuf_reset(&out);
676 strbuf_addf(&out, "%s: ", text);
677 for (w = 0; (w < width) && (i + w < size); w++) {
678 unsigned char ch = ptr[i + w];
679 strbuf_addch(&out,
681 (ch >= 0x20) && (ch < 0x80)
682 ? ch : '.');
683 }
684 strbuf_addch(&out, '\n');
685 trace_strbuf(&trace_curl, &out);
686 }
687 strbuf_release(&out);
688}
689static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
691{
692 const char *text;
693 enum { NO_FILTER = 0, DO_FILTER = 1 };
694 switch (type) {
696 case CURLINFO_TEXT:
697 trace_printf_key(&trace_curl, "== Info: %s", data);
698 break;
699 case CURLINFO_HEADER_OUT:
700 text = "=> Send header";
701 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
702 break;
703 case CURLINFO_DATA_OUT:
704 if (trace_curl_data) {
705 text = "=> Send data";
706 curl_dump_data(text, (unsigned char *)data, size);
707 }
708 break;
709 case CURLINFO_SSL_DATA_OUT:
710 if (trace_curl_data) {
711 text = "=> Send SSL data";
712 curl_dump_data(text, (unsigned char *)data, size);
713 }
714 break;
715 case CURLINFO_HEADER_IN:
716 text = "<= Recv header";
717 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
718 break;
719 case CURLINFO_DATA_IN:
720 if (trace_curl_data) {
721 text = "<= Recv data";
722 curl_dump_data(text, (unsigned char *)data, size);
723 }
724 break;
725 case CURLINFO_SSL_DATA_IN:
726 if (trace_curl_data) {
727 text = "<= Recv SSL data";
728 curl_dump_data(text, (unsigned char *)data, size);
729 }
730 break;
731 default: /* we ignore unknown types by default */
733 return 0;
734 }
735 return 0;
736}
737void setup_curl_trace(CURL *handle)
739{
740 if (!trace_want(&trace_curl))
741 return;
742 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
743 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
744 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
745}
746#ifdef CURLPROTO_HTTP
748static long get_curl_allowed_protocols(int from_user)
749{
750 long allowed_protocols = 0;
751 if (is_transport_allowed("http", from_user))
753 allowed_protocols |= CURLPROTO_HTTP;
754 if (is_transport_allowed("https", from_user))
755 allowed_protocols |= CURLPROTO_HTTPS;
756 if (is_transport_allowed("ftp", from_user))
757 allowed_protocols |= CURLPROTO_FTP;
758 if (is_transport_allowed("ftps", from_user))
759 allowed_protocols |= CURLPROTO_FTPS;
760 return allowed_protocols;
762}
763#endif
764static CURL *get_curl_handle(void)
766{
767 CURL *result = curl_easy_init();
768 if (!result)
770 die("curl_easy_init failed");
771 if (!curl_ssl_verify) {
773 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
774 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
775 } else {
776 /* Verify authenticity of the peer's certificate */
777 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
778 /* The name in the cert must match whom we tried to connect */
779 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
780 }
781#if LIBCURL_VERSION_NUM >= 0x070907
783 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
784#endif
785#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
786 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
787#endif
788#ifdef CURLGSSAPI_DELEGATION_FLAG
790 if (curl_deleg) {
791 int i;
792 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
793 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
794 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
795 curl_deleg_levels[i].curl_deleg_param);
796 break;
797 }
798 }
799 if (i == ARRAY_SIZE(curl_deleg_levels))
800 warning("Unknown delegation method '%s': using default",
801 curl_deleg);
802 }
803#endif
804 if (http_proactive_auth)
806 init_curl_http_auth(result);
807 if (getenv("GIT_SSL_VERSION"))
809 ssl_version = getenv("GIT_SSL_VERSION");
810 if (ssl_version && *ssl_version) {
811 int i;
812 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
813 if (!strcmp(ssl_version, sslversions[i].name)) {
814 curl_easy_setopt(result, CURLOPT_SSLVERSION,
815 sslversions[i].ssl_version);
816 break;
817 }
818 }
819 if (i == ARRAY_SIZE(sslversions))
820 warning("unsupported ssl version %s: using default",
821 ssl_version);
822 }
823 if (getenv("GIT_SSL_CIPHER_LIST"))
825 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
826 if (ssl_cipherlist != NULL && *ssl_cipherlist)
827 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
828 ssl_cipherlist);
829 if (ssl_cert != NULL)
831 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
832 if (has_cert_password())
833 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
834#if LIBCURL_VERSION_NUM >= 0x070903
835 if (ssl_key != NULL)
836 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
837#endif
838#if LIBCURL_VERSION_NUM >= 0x070908
839 if (ssl_capath != NULL)
840 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
841#endif
842#if LIBCURL_VERSION_NUM >= 0x072c00
843 if (ssl_pinnedkey != NULL)
844 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
845#endif
846 if (ssl_cainfo != NULL)
847 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
848 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
850 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
851 curl_low_speed_limit);
852 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
853 curl_low_speed_time);
854 }
855 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
857#if LIBCURL_VERSION_NUM >= 0x071301
858 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
859#elif LIBCURL_VERSION_NUM >= 0x071101
860 curl_easy_setopt(result, CURLOPT_POST301, 1);
861#endif
862#ifdef CURLPROTO_HTTP
863 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
864 get_curl_allowed_protocols(0));
865 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
866 get_curl_allowed_protocols(-1));
867#else
868 warning("protocol restrictions not applied to curl redirects because\n"
869 "your curl version is too old (>= 7.19.4)");
870#endif
871 if (getenv("GIT_CURL_VERBOSE"))
872 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
873 setup_curl_trace(result);
874 if (getenv("GIT_TRACE_CURL_NO_DATA"))
875 trace_curl_data = 0;
876 if (getenv("GIT_REDACT_COOKIES")) {
877 string_list_split(&cookies_to_redact,
878 getenv("GIT_REDACT_COOKIES"), ',', -1);
879 string_list_sort(&cookies_to_redact);
880 }
881 curl_easy_setopt(result, CURLOPT_USERAGENT,
883 user_agent ? user_agent : git_user_agent());
884 if (curl_ftp_no_epsv)
886 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
887#ifdef CURLOPT_USE_SSL
889 if (curl_ssl_try)
890 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
891#endif
892 /*
894 * CURL also examines these variables as a fallback; but we need to query
895 * them here in order to decide whether to prompt for missing password (cf.
896 * init_curl_proxy_auth()).
897 *
898 * Unlike many other common environment variables, these are historically
899 * lowercase only. It appears that CURL did not know this and implemented
900 * only uppercase variants, which was later corrected to take both - with
901 * the exception of http_proxy, which is lowercase only also in CURL. As
902 * the lowercase versions are the historical quasi-standard, they take
903 * precedence here, as in CURL.
904 */
905 if (!curl_http_proxy) {
906 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
907 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
908 var_override(&curl_http_proxy, getenv("https_proxy"));
909 } else {
910 var_override(&curl_http_proxy, getenv("http_proxy"));
911 }
912 if (!curl_http_proxy) {
913 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
914 var_override(&curl_http_proxy, getenv("all_proxy"));
915 }
916 }
917 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
919 /*
920 * Handle case with the empty http.proxy value here to keep
921 * common code clean.
922 * NB: empty option disables proxying at all.
923 */
924 curl_easy_setopt(result, CURLOPT_PROXY, "");
925 } else if (curl_http_proxy) {
926#if LIBCURL_VERSION_NUM >= 0x071800
927 if (starts_with(curl_http_proxy, "socks5h"))
928 curl_easy_setopt(result,
929 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
930 else if (starts_with(curl_http_proxy, "socks5"))
931 curl_easy_setopt(result,
932 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
933 else if (starts_with(curl_http_proxy, "socks4a"))
934 curl_easy_setopt(result,
935 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
936 else if (starts_with(curl_http_proxy, "socks"))
937 curl_easy_setopt(result,
938 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
939#endif
940#if LIBCURL_VERSION_NUM >= 0x073400
941 else if (starts_with(curl_http_proxy, "https"))
942 curl_easy_setopt(result,
943 CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
944#endif
945 if (strstr(curl_http_proxy, "://"))
946 credential_from_url(&proxy_auth, curl_http_proxy);
947 else {
948 struct strbuf url = STRBUF_INIT;
949 strbuf_addf(&url, "http://%s", curl_http_proxy);
950 credential_from_url(&proxy_auth, url.buf);
951 strbuf_release(&url);
952 }
953 if (!proxy_auth.host)
955 die("Invalid proxy URL '%s'", curl_http_proxy);
956 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
958#if LIBCURL_VERSION_NUM >= 0x071304
959 var_override(&curl_no_proxy, getenv("NO_PROXY"));
960 var_override(&curl_no_proxy, getenv("no_proxy"));
961 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
962#endif
963 }
964 init_curl_proxy_auth(result);
965 set_curl_keepalive(result);
967 return result;
969}
970static void set_from_env(const char **var, const char *envname)
972{
973 const char *val = getenv(envname);
974 if (val)
975 *var = val;
976}
977void http_init(struct remote *remote, const char *url, int proactive_auth)
979{
980 char *low_speed_limit;
981 char *low_speed_time;
982 char *normalized_url;
983 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
984 config.section = "http";
986 config.key = NULL;
987 config.collect_fn = http_options;
988 config.cascade_fn = git_default_config;
989 config.cb = NULL;
990 http_is_verbose = 0;
992 normalized_url = url_normalize(url, &config.url);
993 git_config(urlmatch_config_entry, &config);
995 free(normalized_url);
996 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
998 die("curl_global_init failed");
999 http_proactive_auth = proactive_auth;
1001 if (remote && remote->http_proxy)
1003 curl_http_proxy = xstrdup(remote->http_proxy);
1004 if (remote)
1006 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1007 pragma_header = curl_slist_append(http_copy_default_headers(),
1009 "Pragma: no-cache");
1010 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1011 "Pragma:");
1012#ifdef USE_CURL_MULTI
1014 {
1015 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1016 if (http_max_requests != NULL)
1017 max_requests = atoi(http_max_requests);
1018 }
1019 curlm = curl_multi_init();
1021 if (!curlm)
1022 die("curl_multi_init failed");
1023#endif
1024 if (getenv("GIT_SSL_NO_VERIFY"))
1026 curl_ssl_verify = 0;
1027 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1029#if LIBCURL_VERSION_NUM >= 0x070903
1030 set_from_env(&ssl_key, "GIT_SSL_KEY");
1031#endif
1032#if LIBCURL_VERSION_NUM >= 0x070908
1033 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1034#endif
1035 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1036 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1038 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1040 if (low_speed_limit != NULL)
1041 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1042 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1043 if (low_speed_time != NULL)
1044 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1045 if (curl_ssl_verify == -1)
1047 curl_ssl_verify = 1;
1048 curl_session_count = 0;
1050#ifdef USE_CURL_MULTI
1051 if (max_requests < 1)
1052 max_requests = DEFAULT_MAX_REQUESTS;
1053#endif
1054 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1056 curl_ftp_no_epsv = 1;
1057 if (url) {
1059 credential_from_url(&http_auth, url);
1060 if (!ssl_cert_password_required &&
1061 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1062 starts_with(url, "https://"))
1063 ssl_cert_password_required = 1;
1064 }
1065#ifndef NO_CURL_EASY_DUPHANDLE
1067 curl_default = get_curl_handle();
1068#endif
1069}
1070void http_cleanup(void)
1072{
1073 struct active_request_slot *slot = active_queue_head;
1074 while (slot != NULL) {
1076 struct active_request_slot *next = slot->next;
1077 if (slot->curl != NULL) {
1078 xmulti_remove_handle(slot);
1079 curl_easy_cleanup(slot->curl);
1080 }
1081 free(slot);
1082 slot = next;
1083 }
1084 active_queue_head = NULL;
1085#ifndef NO_CURL_EASY_DUPHANDLE
1087 curl_easy_cleanup(curl_default);
1088#endif
1089#ifdef USE_CURL_MULTI
1091 curl_multi_cleanup(curlm);
1092#endif
1093 curl_global_cleanup();
1094 curl_slist_free_all(extra_http_headers);
1096 extra_http_headers = NULL;
1097 curl_slist_free_all(pragma_header);
1099 pragma_header = NULL;
1100 curl_slist_free_all(no_pragma_header);
1102 no_pragma_header = NULL;
1103 if (curl_http_proxy) {
1105 free((void *)curl_http_proxy);
1106 curl_http_proxy = NULL;
1107 }
1108 if (proxy_auth.password) {
1110 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1111 FREE_AND_NULL(proxy_auth.password);
1112 }
1113 free((void *)curl_proxyuserpwd);
1115 curl_proxyuserpwd = NULL;
1116 free((void *)http_proxy_authmethod);
1118 http_proxy_authmethod = NULL;
1119 if (cert_auth.password != NULL) {
1121 memset(cert_auth.password, 0, strlen(cert_auth.password));
1122 FREE_AND_NULL(cert_auth.password);
1123 }
1124 ssl_cert_password_required = 0;
1125 FREE_AND_NULL(cached_accept_language);
1127}
1128struct active_request_slot *get_active_slot(void)
1130{
1131 struct active_request_slot *slot = active_queue_head;
1132 struct active_request_slot *newslot;
1133#ifdef USE_CURL_MULTI
1135 int num_transfers;
1136 /* Wait for a slot to open up if the queue is full */
1138 while (active_requests >= max_requests) {
1139 curl_multi_perform(curlm, &num_transfers);
1140 if (num_transfers < active_requests)
1141 process_curl_messages();
1142 }
1143#endif
1144 while (slot != NULL && slot->in_use)
1146 slot = slot->next;
1147 if (slot == NULL) {
1149 newslot = xmalloc(sizeof(*newslot));
1150 newslot->curl = NULL;
1151 newslot->in_use = 0;
1152 newslot->next = NULL;
1153 slot = active_queue_head;
1155 if (slot == NULL) {
1156 active_queue_head = newslot;
1157 } else {
1158 while (slot->next != NULL)
1159 slot = slot->next;
1160 slot->next = newslot;
1161 }
1162 slot = newslot;
1163 }
1164 if (slot->curl == NULL) {
1166#ifdef NO_CURL_EASY_DUPHANDLE
1167 slot->curl = get_curl_handle();
1168#else
1169 slot->curl = curl_easy_duphandle(curl_default);
1170#endif
1171 curl_session_count++;
1172 }
1173 active_requests++;
1175 slot->in_use = 1;
1176 slot->results = NULL;
1177 slot->finished = NULL;
1178 slot->callback_data = NULL;
1179 slot->callback_func = NULL;
1180 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1181 if (curl_save_cookies)
1182 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1183 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1184 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1185 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1186 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1187 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1188 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1189 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1190 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1191 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1192 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1193 /*
1195 * Default following to off unless "ALWAYS" is configured; this gives
1196 * callers a sane starting point, and they can tweak for individual
1197 * HTTP_FOLLOW_* cases themselves.
1198 */
1199 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1200 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1201 else
1202 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1203#if LIBCURL_VERSION_NUM >= 0x070a08
1205 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1206#endif
1207#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1209#endif
1210 if (http_auth.password || curl_empty_auth_enabled())
1211 init_curl_http_auth(slot->curl);
1212 return slot;
1214}
1215int start_active_slot(struct active_request_slot *slot)
1217{
1218#ifdef USE_CURL_MULTI
1219 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1220 int num_transfers;
1221 if (curlm_result != CURLM_OK &&
1223 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1224 warning("curl_multi_add_handle failed: %s",
1225 curl_multi_strerror(curlm_result));
1226 active_requests--;
1227 slot->in_use = 0;
1228 return 0;
1229 }
1230 /*
1232 * We know there must be something to do, since we just added
1233 * something.
1234 */
1235 curl_multi_perform(curlm, &num_transfers);
1236#endif
1237 return 1;
1238}
1239#ifdef USE_CURL_MULTI
1241struct fill_chain {
1242 void *data;
1243 int (*fill)(void *);
1244 struct fill_chain *next;
1245};
1246static struct fill_chain *fill_cfg;
1248void add_fill_function(void *data, int (*fill)(void *))
1250{
1251 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1252 struct fill_chain **linkp = &fill_cfg;
1253 new_fill->data = data;
1254 new_fill->fill = fill;
1255 new_fill->next = NULL;
1256 while (*linkp)
1257 linkp = &(*linkp)->next;
1258 *linkp = new_fill;
1259}
1260void fill_active_slots(void)
1262{
1263 struct active_request_slot *slot = active_queue_head;
1264 while (active_requests < max_requests) {
1266 struct fill_chain *fill;
1267 for (fill = fill_cfg; fill; fill = fill->next)
1268 if (fill->fill(fill->data))
1269 break;
1270 if (!fill)
1272 break;
1273 }
1274 while (slot != NULL) {
1276 if (!slot->in_use && slot->curl != NULL
1277 && curl_session_count > min_curl_sessions) {
1278 curl_easy_cleanup(slot->curl);
1279 slot->curl = NULL;
1280 curl_session_count--;
1281 }
1282 slot = slot->next;
1283 }
1284}
1285void step_active_slots(void)
1287{
1288 int num_transfers;
1289 CURLMcode curlm_result;
1290 do {
1292 curlm_result = curl_multi_perform(curlm, &num_transfers);
1293 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1294 if (num_transfers < active_requests) {
1295 process_curl_messages();
1296 fill_active_slots();
1297 }
1298}
1299#endif
1300void run_active_slot(struct active_request_slot *slot)
1302{
1303#ifdef USE_CURL_MULTI
1304 fd_set readfds;
1305 fd_set writefds;
1306 fd_set excfds;
1307 int max_fd;
1308 struct timeval select_timeout;
1309 int finished = 0;
1310 slot->finished = &finished;
1312 while (!finished) {
1313 step_active_slots();
1314 if (slot->in_use) {
1316#if LIBCURL_VERSION_NUM >= 0x070f04
1317 long curl_timeout;
1318 curl_multi_timeout(curlm, &curl_timeout);
1319 if (curl_timeout == 0) {
1320 continue;
1321 } else if (curl_timeout == -1) {
1322 select_timeout.tv_sec = 0;
1323 select_timeout.tv_usec = 50000;
1324 } else {
1325 select_timeout.tv_sec = curl_timeout / 1000;
1326 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1327 }
1328#else
1329 select_timeout.tv_sec = 0;
1330 select_timeout.tv_usec = 50000;
1331#endif
1332 max_fd = -1;
1334 FD_ZERO(&readfds);
1335 FD_ZERO(&writefds);
1336 FD_ZERO(&excfds);
1337 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1338 /*
1340 * It can happen that curl_multi_timeout returns a pathologically
1341 * long timeout when curl_multi_fdset returns no file descriptors
1342 * to read. See commit message for more details.
1343 */
1344 if (max_fd < 0 &&
1345 (select_timeout.tv_sec > 0 ||
1346 select_timeout.tv_usec > 50000)) {
1347 select_timeout.tv_sec = 0;
1348 select_timeout.tv_usec = 50000;
1349 }
1350 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1352 }
1353 }
1354#else
1355 while (slot->in_use) {
1356 slot->curl_result = curl_easy_perform(slot->curl);
1357 finish_active_slot(slot);
1358 }
1359#endif
1360}
1361static void release_active_slot(struct active_request_slot *slot)
1363{
1364 closedown_active_slot(slot);
1365 if (slot->curl) {
1366 xmulti_remove_handle(slot);
1367 if (curl_session_count > min_curl_sessions) {
1368 curl_easy_cleanup(slot->curl);
1369 slot->curl = NULL;
1370 curl_session_count--;
1371 }
1372 }
1373#ifdef USE_CURL_MULTI
1374 fill_active_slots();
1375#endif
1376}
1377void finish_all_active_slots(void)
1379{
1380 struct active_request_slot *slot = active_queue_head;
1381 while (slot != NULL)
1383 if (slot->in_use) {
1384 run_active_slot(slot);
1385 slot = active_queue_head;
1386 } else {
1387 slot = slot->next;
1388 }
1389}
1390/* Helpers for modifying and creating URLs */
1392static inline int needs_quote(int ch)
1393{
1394 if (((ch >= 'A') && (ch <= 'Z'))
1395 || ((ch >= 'a') && (ch <= 'z'))
1396 || ((ch >= '0') && (ch <= '9'))
1397 || (ch == '/')
1398 || (ch == '-')
1399 || (ch == '.'))
1400 return 0;
1401 return 1;
1402}
1403static char *quote_ref_url(const char *base, const char *ref)
1405{
1406 struct strbuf buf = STRBUF_INIT;
1407 const char *cp;
1408 int ch;
1409 end_url_with_slash(&buf, base);
1411 for (cp = ref; (ch = *cp) != 0; cp++)
1413 if (needs_quote(ch))
1414 strbuf_addf(&buf, "%%%02x", ch);
1415 else
1416 strbuf_addch(&buf, *cp);
1417 return strbuf_detach(&buf, NULL);
1419}
1420void append_remote_object_url(struct strbuf *buf, const char *url,
1422 const char *hex,
1423 int only_two_digit_prefix)
1424{
1425 end_url_with_slash(buf, url);
1426 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1428 if (!only_two_digit_prefix)
1429 strbuf_addstr(buf, hex + 2);
1430}
1431char *get_remote_object_url(const char *url, const char *hex,
1433 int only_two_digit_prefix)
1434{
1435 struct strbuf buf = STRBUF_INIT;
1436 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1437 return strbuf_detach(&buf, NULL);
1438}
1439static int handle_curl_result(struct slot_results *results)
1441{
1442 /*
1443 * If we see a failing http code with CURLE_OK, we have turned off
1444 * FAILONERROR (to keep the server's custom error response), and should
1445 * translate the code into failure here.
1446 *
1447 * Likewise, if we see a redirect (30x code), that means we turned off
1448 * redirect-following, and we should treat the result as an error.
1449 */
1450 if (results->curl_result == CURLE_OK &&
1451 results->http_code >= 300) {
1452 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1453 /*
1454 * Normally curl will already have put the "reason phrase"
1455 * from the server into curl_errorstr; unfortunately without
1456 * FAILONERROR it is lost, so we can give only the numeric
1457 * status code.
1458 */
1459 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1460 "The requested URL returned error: %ld",
1461 results->http_code);
1462 }
1463 if (results->curl_result == CURLE_OK) {
1465 credential_approve(&http_auth);
1466 if (proxy_auth.password)
1467 credential_approve(&proxy_auth);
1468 return HTTP_OK;
1469 } else if (missing_target(results))
1470 return HTTP_MISSING_TARGET;
1471 else if (results->http_code == 401) {
1472 if (http_auth.username && http_auth.password) {
1473 credential_reject(&http_auth);
1474 return HTTP_NOAUTH;
1475 } else {
1476#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1477 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1478 if (results->auth_avail) {
1479 http_auth_methods &= results->auth_avail;
1480 http_auth_methods_restricted = 1;
1481 }
1482#endif
1483 return HTTP_REAUTH;
1484 }
1485 } else {
1486 if (results->http_connectcode == 407)
1487 credential_reject(&proxy_auth);
1488#if LIBCURL_VERSION_NUM >= 0x070c00
1489 if (!curl_errorstr[0])
1490 strlcpy(curl_errorstr,
1491 curl_easy_strerror(results->curl_result),
1492 sizeof(curl_errorstr));
1493#endif
1494 return HTTP_ERROR;
1495 }
1496}
1497int run_one_slot(struct active_request_slot *slot,
1499 struct slot_results *results)
1500{
1501 slot->results = results;
1502 if (!start_active_slot(slot)) {
1503 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1504 "failed to start HTTP request");
1505 return HTTP_START_FAILED;
1506 }
1507 run_active_slot(slot);
1509 return handle_curl_result(results);
1510}
1511struct curl_slist *http_copy_default_headers(void)
1513{
1514 struct curl_slist *headers = NULL, *h;
1515 for (h = extra_http_headers; h; h = h->next)
1517 headers = curl_slist_append(headers, h->data);
1518 return headers;
1520}
1521static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1523{
1524 char *ptr;
1525 CURLcode ret;
1526 strbuf_reset(buf);
1528 ret = curl_easy_getinfo(curl, info, &ptr);
1529 if (!ret && ptr)
1530 strbuf_addstr(buf, ptr);
1531 return ret;
1532}
1533/*
1535 * Check for and extract a content-type parameter. "raw"
1536 * should be positioned at the start of the potential
1537 * parameter, with any whitespace already removed.
1538 *
1539 * "name" is the name of the parameter. The value is appended
1540 * to "out".
1541 */
1542static int extract_param(const char *raw, const char *name,
1543 struct strbuf *out)
1544{
1545 size_t len = strlen(name);
1546 if (strncasecmp(raw, name, len))
1548 return -1;
1549 raw += len;
1550 if (*raw != '=')
1552 return -1;
1553 raw++;
1554 while (*raw && !isspace(*raw) && *raw != ';')
1556 strbuf_addch(out, *raw++);
1557 return 0;
1558}
1559/*
1561 * Extract a normalized version of the content type, with any
1562 * spaces suppressed, all letters lowercased, and no trailing ";"
1563 * or parameters.
1564 *
1565 * Note that we will silently remove even invalid whitespace. For
1566 * example, "text / plain" is specifically forbidden by RFC 2616,
1567 * but "text/plain" is the only reasonable output, and this keeps
1568 * our code simple.
1569 *
1570 * If the "charset" argument is not NULL, store the value of any
1571 * charset parameter there.
1572 *
1573 * Example:
1574 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1575 * "text / plain" -> "text/plain"
1576 */
1577static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1578 struct strbuf *charset)
1579{
1580 const char *p;
1581 strbuf_reset(type);
1583 strbuf_grow(type, raw->len);
1584 for (p = raw->buf; *p; p++) {
1585 if (isspace(*p))
1586 continue;
1587 if (*p == ';') {
1588 p++;
1589 break;
1590 }
1591 strbuf_addch(type, tolower(*p));
1592 }
1593 if (!charset)
1595 return;
1596 strbuf_reset(charset);
1598 while (*p) {
1599 while (isspace(*p) || *p == ';')
1600 p++;
1601 if (!extract_param(p, "charset", charset))
1602 return;
1603 while (*p && !isspace(*p))
1604 p++;
1605 }
1606 if (!charset->len && starts_with(type->buf, "text/"))
1608 strbuf_addstr(charset, "ISO-8859-1");
1609}
1610static void write_accept_language(struct strbuf *buf)
1612{
1613 /*
1614 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1615 * that, q-value will be smaller than 0.001, the minimum q-value the
1616 * HTTP specification allows. See
1617 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1618 */
1619 const int MAX_DECIMAL_PLACES = 3;
1620 const int MAX_LANGUAGE_TAGS = 1000;
1621 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1622 char **language_tags = NULL;
1623 int num_langs = 0;
1624 const char *s = get_preferred_languages();
1625 int i;
1626 struct strbuf tag = STRBUF_INIT;
1627 /* Don't add Accept-Language header if no language is preferred. */
1629 if (!s)
1630 return;
1631 /*
1633 * Split the colon-separated string of preferred languages into
1634 * language_tags array.
1635 */
1636 do {
1637 /* collect language tag */
1638 for (; *s && (isalnum(*s) || *s == '_'); s++)
1639 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1640 /* skip .codeset, @modifier and any other unnecessary parts */
1642 while (*s && *s != ':')
1643 s++;
1644 if (tag.len) {
1646 num_langs++;
1647 REALLOC_ARRAY(language_tags, num_langs);
1648 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1649 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1650 break;
1651 }
1652 } while (*s++);
1653 /* write Accept-Language header into buf */
1655 if (num_langs) {
1656 int last_buf_len = 0;
1657 int max_q;
1658 int decimal_places;
1659 char q_format[32];
1660 /* add '*' */
1662 REALLOC_ARRAY(language_tags, num_langs + 1);
1663 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1664 /* compute decimal_places */
1666 for (max_q = 1, decimal_places = 0;
1667 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1668 decimal_places++, max_q *= 10)
1669 ;
1670 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1672 strbuf_addstr(buf, "Accept-Language: ");
1674 for (i = 0; i < num_langs; i++) {
1676 if (i > 0)
1677 strbuf_addstr(buf, ", ");
1678 strbuf_addstr(buf, language_tags[i]);
1680 if (i > 0)
1682 strbuf_addf(buf, q_format, max_q - i);
1683 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1685 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1686 break;
1687 }
1688 last_buf_len = buf->len;
1690 }
1691 }
1692 /* free language tags -- last one is a static '*' */
1694 for (i = 0; i < num_langs - 1; i++)
1695 free(language_tags[i]);
1696 free(language_tags);
1697}
1698/*
1700 * Get an Accept-Language header which indicates user's preferred languages.
1701 *
1702 * Examples:
1703 * LANGUAGE= -> ""
1704 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1705 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1706 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1707 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1708 * LANGUAGE= LANG=C -> ""
1709 */
1710static const char *get_accept_language(void)
1711{
1712 if (!cached_accept_language) {
1713 struct strbuf buf = STRBUF_INIT;
1714 write_accept_language(&buf);
1715 if (buf.len > 0)
1716 cached_accept_language = strbuf_detach(&buf, NULL);
1717 }
1718 return cached_accept_language;
1720}
1721static void http_opt_request_remainder(CURL *curl, off_t pos)
1723{
1724 char buf[128];
1725 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1726 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1727}
1728/* http_request() targets */
1730#define HTTP_REQUEST_STRBUF 0
1731#define HTTP_REQUEST_FILE 1
1732static int http_request(const char *url,
1734 void *result, int target,
1735 const struct http_get_options *options)
1736{
1737 struct active_request_slot *slot;
1738 struct slot_results results;
1739 struct curl_slist *headers = http_copy_default_headers();
1740 struct strbuf buf = STRBUF_INIT;
1741 const char *accept_language;
1742 int ret;
1743 slot = get_active_slot();
1745 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1746 if (result == NULL) {
1748 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1749 } else {
1750 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1751 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1752 if (target == HTTP_REQUEST_FILE) {
1754 off_t posn = ftello(result);
1755 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1756 fwrite);
1757 if (posn > 0)
1758 http_opt_request_remainder(slot->curl, posn);
1759 } else
1760 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1761 fwrite_buffer);
1762 }
1763 accept_language = get_accept_language();
1765 if (accept_language)
1767 headers = curl_slist_append(headers, accept_language);
1768 strbuf_addstr(&buf, "Pragma:");
1770 if (options && options->no_cache)
1771 strbuf_addstr(&buf, " no-cache");
1772 if (options && options->keep_error)
1773 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1774 if (options && options->initial_request &&
1775 http_follow_config == HTTP_FOLLOW_INITIAL)
1776 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1777 headers = curl_slist_append(headers, buf.buf);
1779 /* Add additional headers here */
1781 if (options && options->extra_headers) {
1782 const struct string_list_item *item;
1783 for_each_string_list_item(item, options->extra_headers) {
1784 headers = curl_slist_append(headers, item->string);
1785 }
1786 }
1787 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1789 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1790 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1791 ret = run_one_slot(slot, &results);
1793 if (options && options->content_type) {
1795 struct strbuf raw = STRBUF_INIT;
1796 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1797 extract_content_type(&raw, options->content_type,
1798 options->charset);
1799 strbuf_release(&raw);
1800 }
1801 if (options && options->effective_url)
1803 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1804 options->effective_url);
1805 curl_slist_free_all(headers);
1807 strbuf_release(&buf);
1808 return ret;
1810}
1811/*
1813 * Update the "base" url to a more appropriate value, as deduced by
1814 * redirects seen when requesting a URL starting with "url".
1815 *
1816 * The "asked" parameter is a URL that we asked curl to access, and must begin
1817 * with "base".
1818 *
1819 * The "got" parameter is the URL that curl reported to us as where we ended
1820 * up.
1821 *
1822 * Returns 1 if we updated the base url, 0 otherwise.
1823 *
1824 * Our basic strategy is to compare "base" and "asked" to find the bits
1825 * specific to our request. We then strip those bits off of "got" to yield the
1826 * new base. So for example, if our base is "http://example.com/foo.git",
1827 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1828 * with "https://other.example.com/foo.git/info/refs". We would want the
1829 * new URL to become "https://other.example.com/foo.git".
1830 *
1831 * Note that this assumes a sane redirect scheme. It's entirely possible
1832 * in the example above to end up at a URL that does not even end in
1833 * "info/refs". In such a case we die. There's not much we can do, such a
1834 * scheme is unlikely to represent a real git repository, and failing to
1835 * rewrite the base opens options for malicious redirects to do funny things.
1836 */
1837static int update_url_from_redirect(struct strbuf *base,
1838 const char *asked,
1839 const struct strbuf *got)
1840{
1841 const char *tail;
1842 size_t new_len;
1843 if (!strcmp(asked, got->buf))
1845 return 0;
1846 if (!skip_prefix(asked, base->buf, &tail))
1848 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1849 asked, base->buf);
1850 new_len = got->len;
1852 if (!strip_suffix_mem(got->buf, &new_len, tail))
1853 die(_("unable to update url base from redirection:\n"
1854 " asked for: %s\n"
1855 " redirect: %s"),
1856 asked, got->buf);
1857 strbuf_reset(base);
1859 strbuf_add(base, got->buf, new_len);
1860 return 1;
1862}
1863static int http_request_reauth(const char *url,
1865 void *result, int target,
1866 struct http_get_options *options)
1867{
1868 int ret = http_request(url, result, target, options);
1869 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1871 return ret;
1872 if (options && options->effective_url && options->base_url) {
1874 if (update_url_from_redirect(options->base_url,
1875 url, options->effective_url)) {
1876 credential_from_url(&http_auth, options->base_url->buf);
1877 url = options->effective_url->buf;
1878 }
1879 }
1880 if (ret != HTTP_REAUTH)
1882 return ret;
1883 /*
1885 * If we are using KEEP_ERROR, the previous request may have
1886 * put cruft into our output stream; we should clear it out before
1887 * making our next request. We only know how to do this for
1888 * the strbuf case, but that is enough to satisfy current callers.
1889 */
1890 if (options && options->keep_error) {
1891 switch (target) {
1892 case HTTP_REQUEST_STRBUF:
1893 strbuf_reset(result);
1894 break;
1895 default:
1896 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1897 }
1898 }
1899 credential_fill(&http_auth);
1901 return http_request(url, result, target, options);
1903}
1904int http_get_strbuf(const char *url,
1906 struct strbuf *result,
1907 struct http_get_options *options)
1908{
1909 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1910}
1911/*
1913 * Downloads a URL and stores the result in the given file.
1914 *
1915 * If a previous interrupted download is detected (i.e. a previous temporary
1916 * file is still around) the download is resumed.
1917 */
1918static int http_get_file(const char *url, const char *filename,
1919 struct http_get_options *options)
1920{
1921 int ret;
1922 struct strbuf tmpfile = STRBUF_INIT;
1923 FILE *result;
1924 strbuf_addf(&tmpfile, "%s.temp", filename);
1926 result = fopen(tmpfile.buf, "a");
1927 if (!result) {
1928 error("Unable to open local file %s", tmpfile.buf);
1929 ret = HTTP_ERROR;
1930 goto cleanup;
1931 }
1932 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1934 fclose(result);
1935 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1937 ret = HTTP_ERROR;
1938cleanup:
1939 strbuf_release(&tmpfile);
1940 return ret;
1941}
1942int http_fetch_ref(const char *base, struct ref *ref)
1944{
1945 struct http_get_options options = {0};
1946 char *url;
1947 struct strbuf buffer = STRBUF_INIT;
1948 int ret = -1;
1949 options.no_cache = 1;
1951 url = quote_ref_url(base, ref->name);
1953 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1954 strbuf_rtrim(&buffer);
1955 if (buffer.len == 40)
1956 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1957 else if (starts_with(buffer.buf, "ref: ")) {
1958 ref->symref = xstrdup(buffer.buf + 5);
1959 ret = 0;
1960 }
1961 }
1962 strbuf_release(&buffer);
1964 free(url);
1965 return ret;
1966}
1967/* Helpers for fetching packs */
1969static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1970{
1971 char *url, *tmp;
1972 struct strbuf buf = STRBUF_INIT;
1973 if (http_is_verbose)
1975 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1976 end_url_with_slash(&buf, base_url);
1978 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1979 url = strbuf_detach(&buf, NULL);
1980 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1982 tmp = strbuf_detach(&buf, NULL);
1983 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1985 error("Unable to get pack index %s", url);
1986 FREE_AND_NULL(tmp);
1987 }
1988 free(url);
1990 return tmp;
1991}
1992static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1994 unsigned char *sha1, const char *base_url)
1995{
1996 struct packed_git *new_pack;
1997 char *tmp_idx = NULL;
1998 int ret;
1999 if (has_pack_index(sha1)) {
2001 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2002 if (!new_pack)
2003 return -1; /* parse_pack_index() already issued error message */
2004 goto add_pack;
2005 }
2006 tmp_idx = fetch_pack_index(sha1, base_url);
2008 if (!tmp_idx)
2009 return -1;
2010 new_pack = parse_pack_index(sha1, tmp_idx);
2012 if (!new_pack) {
2013 unlink(tmp_idx);
2014 free(tmp_idx);
2015 return -1; /* parse_pack_index() already issued error message */
2017 }
2018 ret = verify_pack_index(new_pack);
2020 if (!ret) {
2021 close_pack_index(new_pack);
2022 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2023 }
2024 free(tmp_idx);
2025 if (ret)
2026 return -1;
2027add_pack:
2029 new_pack->next = *packs_head;
2030 *packs_head = new_pack;
2031 return 0;
2032}
2033int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2035{
2036 struct http_get_options options = {0};
2037 int ret = 0, i = 0;
2038 char *url, *data;
2039 struct strbuf buf = STRBUF_INIT;
2040 unsigned char sha1[20];
2041 end_url_with_slash(&buf, base_url);
2043 strbuf_addstr(&buf, "objects/info/packs");
2044 url = strbuf_detach(&buf, NULL);
2045 options.no_cache = 1;
2047 ret = http_get_strbuf(url, &buf, &options);
2048 if (ret != HTTP_OK)
2049 goto cleanup;
2050 data = buf.buf;
2052 while (i < buf.len) {
2053 switch (data[i]) {
2054 case 'P':
2055 i++;
2056 if (i + 52 <= buf.len &&
2057 starts_with(data + i, " pack-") &&
2058 starts_with(data + i + 46, ".pack\n")) {
2059 get_sha1_hex(data + i + 6, sha1);
2060 fetch_and_setup_pack_index(packs_head, sha1,
2061 base_url);
2062 i += 51;
2063 break;
2064 }
2065 default:
2066 while (i < buf.len && data[i] != '\n')
2067 i++;
2068 }
2069 i++;
2070 }
2071cleanup:
2073 free(url);
2074 return ret;
2075}
2076void release_http_pack_request(struct http_pack_request *preq)
2078{
2079 if (preq->packfile != NULL) {
2080 fclose(preq->packfile);
2081 preq->packfile = NULL;
2082 }
2083 preq->slot = NULL;
2084 free(preq->url);
2085 free(preq);
2086}
2087int finish_http_pack_request(struct http_pack_request *preq)
2089{
2090 struct packed_git **lst;
2091 struct packed_git *p = preq->target;
2092 char *tmp_idx;
2093 size_t len;
2094 struct child_process ip = CHILD_PROCESS_INIT;
2095 close_pack_index(p);
2097 fclose(preq->packfile);
2099 preq->packfile = NULL;
2100 lst = preq->lst;
2102 while (*lst != p)
2103 lst = &((*lst)->next);
2104 *lst = (*lst)->next;
2105 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2107 die("BUG: pack tmpfile does not end in .pack.temp?");
2108 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2109 argv_array_push(&ip.args, "index-pack");
2111 argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
2112 argv_array_push(&ip.args, preq->tmpfile);
2113 ip.git_cmd = 1;
2114 ip.no_stdin = 1;
2115 ip.no_stdout = 1;
2116 if (run_command(&ip)) {
2118 unlink(preq->tmpfile);
2119 unlink(tmp_idx);
2120 free(tmp_idx);
2121 return -1;
2122 }
2123 unlink(sha1_pack_index_name(p->sha1));
2125 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2127 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2128 free(tmp_idx);
2129 return -1;
2130 }
2131 install_packed_git(p);
2133 free(tmp_idx);
2134 return 0;
2135}
2136struct http_pack_request *new_http_pack_request(
2138 struct packed_git *target, const char *base_url)
2139{
2140 off_t prev_posn = 0;
2141 struct strbuf buf = STRBUF_INIT;
2142 struct http_pack_request *preq;
2143 preq = xcalloc(1, sizeof(*preq));
2145 preq->target = target;
2146 end_url_with_slash(&buf, base_url);
2148 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2149 sha1_to_hex(target->sha1));
2150 preq->url = strbuf_detach(&buf, NULL);
2151 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2153 sha1_pack_name(target->sha1));
2154 preq->packfile = fopen(preq->tmpfile, "a");
2155 if (!preq->packfile) {
2156 error("Unable to open local file %s for pack",
2157 preq->tmpfile);
2158 goto abort;
2159 }
2160 preq->slot = get_active_slot();
2162 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2163 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2164 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2165 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2166 no_pragma_header);
2167 /*
2169 * If there is data present from a previous transfer attempt,
2170 * resume where it left off
2171 */
2172 prev_posn = ftello(preq->packfile);
2173 if (prev_posn>0) {
2174 if (http_is_verbose)
2175 fprintf(stderr,
2176 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2177 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2178 http_opt_request_remainder(preq->slot->curl, prev_posn);
2179 }
2180 return preq;
2182abort:
2184 free(preq->url);
2185 free(preq);
2186 return NULL;
2187}
2188/* Helpers for fetching objects (loose) */
2190static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2191 void *data)
2192{
2193 unsigned char expn[4096];
2194 size_t size = eltsize * nmemb;
2195 int posn = 0;
2196 struct http_object_request *freq = data;
2197 struct active_request_slot *slot = freq->slot;
2198 if (slot) {
2200 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2201 &slot->http_code);
2202 if (c != CURLE_OK)
2203 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2204 curl_easy_strerror(c));
2205 if (slot->http_code >= 300)
2206 return size;
2207 }
2208 do {
2210 ssize_t retval = xwrite(freq->localfile,
2211 (char *) ptr + posn, size - posn);
2212 if (retval < 0)
2213 return posn;
2214 posn += retval;
2215 } while (posn < size);
2216 freq->stream.avail_in = size;
2218 freq->stream.next_in = (void *)ptr;
2219 do {
2220 freq->stream.next_out = expn;
2221 freq->stream.avail_out = sizeof(expn);
2222 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2223 git_SHA1_Update(&freq->c, expn,
2224 sizeof(expn) - freq->stream.avail_out);
2225 } while (freq->stream.avail_in && freq->zret == Z_OK);
2226 return size;
2227}
2228struct http_object_request *new_http_object_request(const char *base_url,
2230 unsigned char *sha1)
2231{
2232 char *hex = sha1_to_hex(sha1);
2233 struct strbuf filename = STRBUF_INIT;
2234 char prevfile[PATH_MAX];
2235 int prevlocal;
2236 char prev_buf[PREV_BUF_SIZE];
2237 ssize_t prev_read = 0;
2238 off_t prev_posn = 0;
2239 struct http_object_request *freq;
2240 freq = xcalloc(1, sizeof(*freq));
2242 hashcpy(freq->sha1, sha1);
2243 freq->localfile = -1;
2244 sha1_file_name(&filename, sha1);
2246 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2247 "%s.temp", filename.buf);
2248 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename.buf);
2250 unlink_or_warn(prevfile);
2251 rename(freq->tmpfile, prevfile);
2252 unlink_or_warn(freq->tmpfile);
2253 strbuf_release(&filename);
2254 if (freq->localfile != -1)
2256 error("fd leakage in start: %d", freq->localfile);
2257 freq->localfile = open(freq->tmpfile,
2258 O_WRONLY | O_CREAT | O_EXCL, 0666);
2259 /*
2260 * This could have failed due to the "lazy directory creation";
2261 * try to mkdir the last path component.
2262 */
2263 if (freq->localfile < 0 && errno == ENOENT) {
2264 char *dir = strrchr(freq->tmpfile, '/');
2265 if (dir) {
2266 *dir = 0;
2267 mkdir(freq->tmpfile, 0777);
2268 *dir = '/';
2269 }
2270 freq->localfile = open(freq->tmpfile,
2271 O_WRONLY | O_CREAT | O_EXCL, 0666);
2272 }
2273 if (freq->localfile < 0) {
2275 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2276 goto abort;
2277 }
2278 git_inflate_init(&freq->stream);
2280 git_SHA1_Init(&freq->c);
2282 freq->url = get_remote_object_url(base_url, hex, 0);
2284 /*
2286 * If a previous temp file is present, process what was already
2287 * fetched.
2288 */
2289 prevlocal = open(prevfile, O_RDONLY);
2290 if (prevlocal != -1) {
2291 do {
2292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2293 if (prev_read>0) {
2294 if (fwrite_sha1_file(prev_buf,
2295 1,
2296 prev_read,
2297 freq) == prev_read) {
2298 prev_posn += prev_read;
2299 } else {
2300 prev_read = -1;
2301 }
2302 }
2303 } while (prev_read > 0);
2304 close(prevlocal);
2305 }
2306 unlink_or_warn(prevfile);
2307 /*
2309 * Reset inflate/SHA1 if there was an error reading the previous temp
2310 * file; also rewind to the beginning of the local file.
2311 */
2312 if (prev_read == -1) {
2313 memset(&freq->stream, 0, sizeof(freq->stream));
2314 git_inflate_init(&freq->stream);
2315 git_SHA1_Init(&freq->c);
2316 if (prev_posn>0) {
2317 prev_posn = 0;
2318 lseek(freq->localfile, 0, SEEK_SET);
2319 if (ftruncate(freq->localfile, 0) < 0) {
2320 error_errno("Couldn't truncate temporary file %s",
2321 freq->tmpfile);
2322 goto abort;
2323 }
2324 }
2325 }
2326 freq->slot = get_active_slot();
2328 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2330 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2331 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2332 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2333 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2334 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2335 /*
2337 * If we have successfully processed data from a previous fetch
2338 * attempt, only fetch the data we don't already have.
2339 */
2340 if (prev_posn>0) {
2341 if (http_is_verbose)
2342 fprintf(stderr,
2343 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2344 hex, (uintmax_t)prev_posn);
2345 http_opt_request_remainder(freq->slot->curl, prev_posn);
2346 }
2347 return freq;
2349abort:
2351 free(freq->url);
2352 free(freq);
2353 return NULL;
2354}
2355void process_http_object_request(struct http_object_request *freq)
2357{
2358 if (freq->slot == NULL)
2359 return;
2360 freq->curl_result = freq->slot->curl_result;
2361 freq->http_code = freq->slot->http_code;
2362 freq->slot = NULL;
2363}
2364int finish_http_object_request(struct http_object_request *freq)
2366{
2367 struct stat st;
2368 struct strbuf filename = STRBUF_INIT;
2369 close(freq->localfile);
2371 freq->localfile = -1;
2372 process_http_object_request(freq);
2374 if (freq->http_code == 416) {
2376 warning("requested range invalid; we may already have all the data.");
2377 } else if (freq->curl_result != CURLE_OK) {
2378 if (stat(freq->tmpfile, &st) == 0)
2379 if (st.st_size == 0)
2380 unlink_or_warn(freq->tmpfile);
2381 return -1;
2382 }
2383 git_inflate_end(&freq->stream);
2385 git_SHA1_Final(freq->real_sha1, &freq->c);
2386 if (freq->zret != Z_STREAM_END) {
2387 unlink_or_warn(freq->tmpfile);
2388 return -1;
2389 }
2390 if (hashcmp(freq->sha1, freq->real_sha1)) {
2391 unlink_or_warn(freq->tmpfile);
2392 return -1;
2393 }
2394 sha1_file_name(&filename, freq->sha1);
2396 freq->rename = finalize_object_file(freq->tmpfile, filename.buf);
2397 strbuf_release(&filename);
2398 return freq->rename;
2400}
2401void abort_http_object_request(struct http_object_request *freq)
2403{
2404 unlink_or_warn(freq->tmpfile);
2405 release_http_object_request(freq);
2407}
2408void release_http_object_request(struct http_object_request *freq)
2410{
2411 if (freq->localfile != -1) {
2412 close(freq->localfile);
2413 freq->localfile = -1;
2414 }
2415 if (freq->url != NULL) {
2416 FREE_AND_NULL(freq->url);
2417 }
2418 if (freq->slot != NULL) {
2419 freq->slot->callback_func = NULL;
2420 freq->slot->callback_data = NULL;
2421 release_active_slot(freq->slot);
2422 freq->slot = NULL;
2423 }
2424}