088cf70bf039d57adf5c9179238b6e4d138a51cb
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 struct string_list cookies_to_redact = STRING_LIST_INIT_DUP;
20#if LIBCURL_VERSION_NUM >= 0x070a08
21long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
22#else
23long int git_curl_ipresolve;
24#endif
25int active_requests;
26int http_is_verbose;
27ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
28#if LIBCURL_VERSION_NUM >= 0x070a06
30#define LIBCURL_CAN_HANDLE_AUTH_ANY
31#endif
32static int min_curl_sessions = 1;
34static int curl_session_count;
35#ifdef USE_CURL_MULTI
36static int max_requests = -1;
37static CURLM *curlm;
38#endif
39#ifndef NO_CURL_EASY_DUPHANDLE
40static CURL *curl_default;
41#endif
42#define PREV_BUF_SIZE 4096
44char curl_errorstr[CURL_ERROR_SIZE];
46static int curl_ssl_verify = -1;
48static int curl_ssl_try;
49static const char *ssl_cert;
50static const char *ssl_cipherlist;
51static const char *ssl_version;
52static struct {
53 const char *name;
54 long ssl_version;
55} sslversions[] = {
56 { "sslv2", CURL_SSLVERSION_SSLv2 },
57 { "sslv3", CURL_SSLVERSION_SSLv3 },
58 { "tlsv1", CURL_SSLVERSION_TLSv1 },
59#if LIBCURL_VERSION_NUM >= 0x072200
60 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
61 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
62 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
63#endif
64};
65#if LIBCURL_VERSION_NUM >= 0x070903
66static const char *ssl_key;
67#endif
68#if LIBCURL_VERSION_NUM >= 0x070908
69static const char *ssl_capath;
70#endif
71#if LIBCURL_VERSION_NUM >= 0x072c00
72static const char *ssl_pinnedkey;
73#endif
74static const char *ssl_cainfo;
75static long curl_low_speed_limit = -1;
76static long curl_low_speed_time = -1;
77static int curl_ftp_no_epsv;
78static const char *curl_http_proxy;
79static const char *curl_no_proxy;
80static const char *http_proxy_authmethod;
81static struct {
82 const char *name;
83 long curlauth_param;
84} proxy_authmethods[] = {
85 { "basic", CURLAUTH_BASIC },
86 { "digest", CURLAUTH_DIGEST },
87 { "negotiate", CURLAUTH_GSSNEGOTIATE },
88 { "ntlm", CURLAUTH_NTLM },
89#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
90 { "anyauth", CURLAUTH_ANY },
91#endif
92 /*
93 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
94 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
95 * here, too
96 */
97};
98#ifdef CURLGSSAPI_DELEGATION_FLAG
99static const char *curl_deleg;
100static struct {
101 const char *name;
102 long curl_deleg_param;
103} curl_deleg_levels[] = {
104 { "none", CURLGSSAPI_DELEGATION_NONE },
105 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
106 { "always", CURLGSSAPI_DELEGATION_FLAG },
107};
108#endif
109static struct credential proxy_auth = CREDENTIAL_INIT;
111static const char *curl_proxyuserpwd;
112static const char *curl_cookie_file;
113static int curl_save_cookies;
114struct credential http_auth = CREDENTIAL_INIT;
115static int http_proactive_auth;
116static const char *user_agent;
117static int curl_empty_auth = -1;
118enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
120#if LIBCURL_VERSION_NUM >= 0x071700
122/* Use CURLOPT_KEYPASSWD as is */
123#elif LIBCURL_VERSION_NUM >= 0x070903
124#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
125#else
126#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
127#endif
128static struct credential cert_auth = CREDENTIAL_INIT;
130static int ssl_cert_password_required;
131#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
132static unsigned long http_auth_methods = CURLAUTH_ANY;
133static int http_auth_methods_restricted;
134/* Modes for which empty_auth cannot actually help us. */
135static unsigned long empty_auth_useless =
136 CURLAUTH_BASIC
137#ifdef CURLAUTH_DIGEST_IE
138 | CURLAUTH_DIGEST_IE
139#endif
140 | CURLAUTH_DIGEST;
141#endif
142static struct curl_slist *pragma_header;
144static struct curl_slist *no_pragma_header;
145static struct curl_slist *extra_http_headers;
146static struct active_request_slot *active_queue_head;
148static char *cached_accept_language;
150size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
152{
153 size_t size = eltsize * nmemb;
154 struct buffer *buffer = buffer_;
155 if (size > buffer->buf.len - buffer->posn)
157 size = buffer->buf.len - buffer->posn;
158 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
159 buffer->posn += size;
160 return size;
162}
163#ifndef NO_CURL_IOCTL
165curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
166{
167 struct buffer *buffer = clientp;
168 switch (cmd) {
170 case CURLIOCMD_NOP:
171 return CURLIOE_OK;
172 case CURLIOCMD_RESTARTREAD:
174 buffer->posn = 0;
175 return CURLIOE_OK;
176 default:
178 return CURLIOE_UNKNOWNCMD;
179 }
180}
181#endif
182size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
184{
185 size_t size = eltsize * nmemb;
186 struct strbuf *buffer = buffer_;
187 strbuf_add(buffer, ptr, size);
189 return size;
190}
191size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
193{
194 return eltsize * nmemb;
195}
196static void closedown_active_slot(struct active_request_slot *slot)
198{
199 active_requests--;
200 slot->in_use = 0;
201}
202static void finish_active_slot(struct active_request_slot *slot)
204{
205 closedown_active_slot(slot);
206 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
207 if (slot->finished != NULL)
209 (*slot->finished) = 1;
210 /* Store slot results so they can be read after the slot is reused */
212 if (slot->results != NULL) {
213 slot->results->curl_result = slot->curl_result;
214 slot->results->http_code = slot->http_code;
215#if LIBCURL_VERSION_NUM >= 0x070a08
216 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
217 &slot->results->auth_avail);
218#else
219 slot->results->auth_avail = 0;
220#endif
221 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
223 &slot->results->http_connectcode);
224 }
225 /* Run callback if appropriate */
227 if (slot->callback_func != NULL)
228 slot->callback_func(slot->callback_data);
229}
230static void xmulti_remove_handle(struct active_request_slot *slot)
232{
233#ifdef USE_CURL_MULTI
234 curl_multi_remove_handle(curlm, slot->curl);
235#endif
236}
237#ifdef USE_CURL_MULTI
239static void process_curl_messages(void)
240{
241 int num_messages;
242 struct active_request_slot *slot;
243 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
244 while (curl_message != NULL) {
246 if (curl_message->msg == CURLMSG_DONE) {
247 int curl_result = curl_message->data.result;
248 slot = active_queue_head;
249 while (slot != NULL &&
250 slot->curl != curl_message->easy_handle)
251 slot = slot->next;
252 if (slot != NULL) {
253 xmulti_remove_handle(slot);
254 slot->curl_result = curl_result;
255 finish_active_slot(slot);
256 } else {
257 fprintf(stderr, "Received DONE message for unknown request!\n");
258 }
259 } else {
260 fprintf(stderr, "Unknown CURL message received: %d\n",
261 (int)curl_message->msg);
262 }
263 curl_message = curl_multi_info_read(curlm, &num_messages);
264 }
265}
266#endif
267static int http_options(const char *var, const char *value, void *cb)
269{
270 if (!strcmp("http.sslverify", var)) {
271 curl_ssl_verify = git_config_bool(var, value);
272 return 0;
273 }
274 if (!strcmp("http.sslcipherlist", var))
275 return git_config_string(&ssl_cipherlist, var, value);
276 if (!strcmp("http.sslversion", var))
277 return git_config_string(&ssl_version, var, value);
278 if (!strcmp("http.sslcert", var))
279 return git_config_pathname(&ssl_cert, var, value);
280#if LIBCURL_VERSION_NUM >= 0x070903
281 if (!strcmp("http.sslkey", var))
282 return git_config_pathname(&ssl_key, var, value);
283#endif
284#if LIBCURL_VERSION_NUM >= 0x070908
285 if (!strcmp("http.sslcapath", var))
286 return git_config_pathname(&ssl_capath, var, value);
287#endif
288 if (!strcmp("http.sslcainfo", var))
289 return git_config_pathname(&ssl_cainfo, var, value);
290 if (!strcmp("http.sslcertpasswordprotected", var)) {
291 ssl_cert_password_required = git_config_bool(var, value);
292 return 0;
293 }
294 if (!strcmp("http.ssltry", var)) {
295 curl_ssl_try = git_config_bool(var, value);
296 return 0;
297 }
298 if (!strcmp("http.minsessions", var)) {
299 min_curl_sessions = git_config_int(var, value);
300#ifndef USE_CURL_MULTI
301 if (min_curl_sessions > 1)
302 min_curl_sessions = 1;
303#endif
304 return 0;
305 }
306#ifdef USE_CURL_MULTI
307 if (!strcmp("http.maxrequests", var)) {
308 max_requests = git_config_int(var, value);
309 return 0;
310 }
311#endif
312 if (!strcmp("http.lowspeedlimit", var)) {
313 curl_low_speed_limit = (long)git_config_int(var, value);
314 return 0;
315 }
316 if (!strcmp("http.lowspeedtime", var)) {
317 curl_low_speed_time = (long)git_config_int(var, value);
318 return 0;
319 }
320 if (!strcmp("http.noepsv", var)) {
322 curl_ftp_no_epsv = git_config_bool(var, value);
323 return 0;
324 }
325 if (!strcmp("http.proxy", var))
326 return git_config_string(&curl_http_proxy, var, value);
327 if (!strcmp("http.proxyauthmethod", var))
329 return git_config_string(&http_proxy_authmethod, var, value);
330 if (!strcmp("http.cookiefile", var))
332 return git_config_pathname(&curl_cookie_file, var, value);
333 if (!strcmp("http.savecookies", var)) {
334 curl_save_cookies = git_config_bool(var, value);
335 return 0;
336 }
337 if (!strcmp("http.postbuffer", var)) {
339 http_post_buffer = git_config_ssize_t(var, value);
340 if (http_post_buffer < 0)
341 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
342 if (http_post_buffer < LARGE_PACKET_MAX)
343 http_post_buffer = LARGE_PACKET_MAX;
344 return 0;
345 }
346 if (!strcmp("http.useragent", var))
348 return git_config_string(&user_agent, var, value);
349 if (!strcmp("http.emptyauth", var)) {
351 if (value && !strcmp("auto", value))
352 curl_empty_auth = -1;
353 else
354 curl_empty_auth = git_config_bool(var, value);
355 return 0;
356 }
357 if (!strcmp("http.delegation", var)) {
359#ifdef CURLGSSAPI_DELEGATION_FLAG
360 return git_config_string(&curl_deleg, var, value);
361#else
362 warning(_("Delegation control is not supported with cURL < 7.22.0"));
363 return 0;
364#endif
365 }
366 if (!strcmp("http.pinnedpubkey", var)) {
368#if LIBCURL_VERSION_NUM >= 0x072c00
369 return git_config_pathname(&ssl_pinnedkey, var, value);
370#else
371 warning(_("Public key pinning not supported with cURL < 7.44.0"));
372 return 0;
373#endif
374 }
375 if (!strcmp("http.extraheader", var)) {
377 if (!value) {
378 return config_error_nonbool(var);
379 } else if (!*value) {
380 curl_slist_free_all(extra_http_headers);
381 extra_http_headers = NULL;
382 } else {
383 extra_http_headers =
384 curl_slist_append(extra_http_headers, value);
385 }
386 return 0;
387 }
388 if (!strcmp("http.followredirects", var)) {
390 if (value && !strcmp(value, "initial"))
391 http_follow_config = HTTP_FOLLOW_INITIAL;
392 else if (git_config_bool(var, value))
393 http_follow_config = HTTP_FOLLOW_ALWAYS;
394 else
395 http_follow_config = HTTP_FOLLOW_NONE;
396 return 0;
397 }
398 /* Fall back on the default ones */
400 return git_default_config(var, value, cb);
401}
402static int curl_empty_auth_enabled(void)
404{
405 if (curl_empty_auth >= 0)
406 return curl_empty_auth;
407#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
409 /*
410 * Our libcurl is too old to do AUTH_ANY in the first place;
411 * just default to turning the feature off.
412 */
413#else
414 /*
415 * In the automatic case, kick in the empty-auth
416 * hack as long as we would potentially try some
417 * method more exotic than "Basic" or "Digest".
418 *
419 * But only do this when this is our second or
420 * subsequent request, as by then we know what
421 * methods are available.
422 */
423 if (http_auth_methods_restricted &&
424 (http_auth_methods & ~empty_auth_useless))
425 return 1;
426#endif
427 return 0;
428}
429static void init_curl_http_auth(CURL *result)
431{
432 if (!http_auth.username || !*http_auth.username) {
433 if (curl_empty_auth_enabled())
434 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
435 return;
436 }
437 credential_fill(&http_auth);
439#if LIBCURL_VERSION_NUM >= 0x071301
441 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
442 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
443#else
444 {
445 static struct strbuf up = STRBUF_INIT;
446 /*
447 * Note that we assume we only ever have a single set of
448 * credentials in a given program run, so we do not have
449 * to worry about updating this buffer, only setting its
450 * initial value.
451 */
452 if (!up.len)
453 strbuf_addf(&up, "%s:%s",
454 http_auth.username, http_auth.password);
455 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
456 }
457#endif
458}
459/* *var must be free-able */
461static void var_override(const char **var, char *value)
462{
463 if (value) {
464 free((void *)*var);
465 *var = xstrdup(value);
466 }
467}
468static void set_proxyauth_name_password(CURL *result)
470{
471#if LIBCURL_VERSION_NUM >= 0x071301
472 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
473 proxy_auth.username);
474 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
475 proxy_auth.password);
476#else
477 struct strbuf s = STRBUF_INIT;
478 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
480 strbuf_addch(&s, ':');
481 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
482 curl_proxyuserpwd = strbuf_detach(&s, NULL);
483 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
484#endif
485}
486static void init_curl_proxy_auth(CURL *result)
488{
489 if (proxy_auth.username) {
490 if (!proxy_auth.password)
491 credential_fill(&proxy_auth);
492 set_proxyauth_name_password(result);
493 }
494 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
496#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
498 if (http_proxy_authmethod) {
499 int i;
500 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
501 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
502 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
503 proxy_authmethods[i].curlauth_param);
504 break;
505 }
506 }
507 if (i == ARRAY_SIZE(proxy_authmethods)) {
508 warning("unsupported proxy authentication method %s: using anyauth",
509 http_proxy_authmethod);
510 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
511 }
512 }
513 else
514 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
515#endif
516}
517static int has_cert_password(void)
519{
520 if (ssl_cert == NULL || ssl_cert_password_required != 1)
521 return 0;
522 if (!cert_auth.password) {
523 cert_auth.protocol = xstrdup("cert");
524 cert_auth.username = xstrdup("");
525 cert_auth.path = xstrdup(ssl_cert);
526 credential_fill(&cert_auth);
527 }
528 return 1;
529}
530#if LIBCURL_VERSION_NUM >= 0x071900
532static void set_curl_keepalive(CURL *c)
533{
534 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
535}
536#elif LIBCURL_VERSION_NUM >= 0x071000
538static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
539{
540 int ka = 1;
541 int rc;
542 socklen_t len = (socklen_t)sizeof(ka);
543 if (type != CURLSOCKTYPE_IPCXN)
545 return 0;
546 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
548 if (rc < 0)
549 warning_errno("unable to set SO_KEEPALIVE on socket");
550 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
552}
553static void set_curl_keepalive(CURL *c)
555{
556 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
557}
558#else
560static void set_curl_keepalive(CURL *c)
561{
562 /* not supported on older curl versions */
563}
564#endif
565static void redact_sensitive_header(struct strbuf *header)
567{
568 const char *sensitive_header;
569 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
571 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
572 /* The first token is the type, which is OK to log */
573 while (isspace(*sensitive_header))
574 sensitive_header++;
575 while (*sensitive_header && !isspace(*sensitive_header))
576 sensitive_header++;
577 /* Everything else is opaque and possibly sensitive */
578 strbuf_setlen(header, sensitive_header - header->buf);
579 strbuf_addstr(header, " <redacted>");
580 } else if (cookies_to_redact.nr &&
581 skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
582 struct strbuf redacted_header = STRBUF_INIT;
583 char *cookie;
584 while (isspace(*sensitive_header))
586 sensitive_header++;
587 /*
589 * The contents of header starting from sensitive_header will
590 * subsequently be overridden, so it is fine to mutate this
591 * string (hence the assignment to "char *").
592 */
593 cookie = (char *) sensitive_header;
594 while (cookie) {
596 char *equals;
597 char *semicolon = strstr(cookie, "; ");
598 if (semicolon)
599 *semicolon = 0;
600 equals = strchrnul(cookie, '=');
601 if (!equals) {
602 /* invalid cookie, just append and continue */
603 strbuf_addstr(&redacted_header, cookie);
604 continue;
605 }
606 *equals = 0; /* temporarily set to NUL for lookup */
607 if (string_list_lookup(&cookies_to_redact, cookie)) {
608 strbuf_addstr(&redacted_header, cookie);
609 strbuf_addstr(&redacted_header, "=<redacted>");
610 } else {
611 *equals = '=';
612 strbuf_addstr(&redacted_header, cookie);
613 }
614 if (semicolon) {
615 /*
616 * There are more cookies. (Or, for some
617 * reason, the input string ends in "; ".)
618 */
619 strbuf_addstr(&redacted_header, "; ");
620 cookie = semicolon + strlen("; ");
621 } else {
622 cookie = NULL;
623 }
624 }
625 strbuf_setlen(header, sensitive_header - header->buf);
627 strbuf_addbuf(header, &redacted_header);
628 }
629}
630static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
632{
633 struct strbuf out = STRBUF_INIT;
634 struct strbuf **headers, **header;
635 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
637 text, (long)size, (long)size);
638 trace_strbuf(&trace_curl, &out);
639 strbuf_reset(&out);
640 strbuf_add(&out, ptr, size);
641 headers = strbuf_split_max(&out, '\n', 0);
642 for (header = headers; *header; header++) {
644 if (hide_sensitive_header)
645 redact_sensitive_header(*header);
646 strbuf_insert((*header), 0, text, strlen(text));
647 strbuf_insert((*header), strlen(text), ": ", 2);
648 strbuf_rtrim((*header));
649 strbuf_addch((*header), '\n');
650 trace_strbuf(&trace_curl, (*header));
651 }
652 strbuf_list_free(headers);
653 strbuf_release(&out);
654}
655static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
657{
658 size_t i;
659 struct strbuf out = STRBUF_INIT;
660 unsigned int width = 60;
661 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
663 text, (long)size, (long)size);
664 trace_strbuf(&trace_curl, &out);
665 for (i = 0; i < size; i += width) {
667 size_t w;
668 strbuf_reset(&out);
670 strbuf_addf(&out, "%s: ", text);
671 for (w = 0; (w < width) && (i + w < size); w++) {
672 unsigned char ch = ptr[i + w];
673 strbuf_addch(&out,
675 (ch >= 0x20) && (ch < 0x80)
676 ? ch : '.');
677 }
678 strbuf_addch(&out, '\n');
679 trace_strbuf(&trace_curl, &out);
680 }
681 strbuf_release(&out);
682}
683static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
685{
686 const char *text;
687 enum { NO_FILTER = 0, DO_FILTER = 1 };
688 switch (type) {
690 case CURLINFO_TEXT:
691 trace_printf_key(&trace_curl, "== Info: %s", data);
692 break;
693 case CURLINFO_HEADER_OUT:
694 text = "=> Send header";
695 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
696 break;
697 case CURLINFO_DATA_OUT:
698 text = "=> Send data";
699 curl_dump_data(text, (unsigned char *)data, size);
700 break;
701 case CURLINFO_SSL_DATA_OUT:
702 text = "=> Send SSL data";
703 curl_dump_data(text, (unsigned char *)data, size);
704 break;
705 case CURLINFO_HEADER_IN:
706 text = "<= Recv header";
707 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
708 break;
709 case CURLINFO_DATA_IN:
710 text = "<= Recv data";
711 curl_dump_data(text, (unsigned char *)data, size);
712 break;
713 case CURLINFO_SSL_DATA_IN:
714 text = "<= Recv SSL data";
715 curl_dump_data(text, (unsigned char *)data, size);
716 break;
717 default: /* we ignore unknown types by default */
719 return 0;
720 }
721 return 0;
722}
723void setup_curl_trace(CURL *handle)
725{
726 if (!trace_want(&trace_curl))
727 return;
728 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
729 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
730 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
731}
732#ifdef CURLPROTO_HTTP
734static long get_curl_allowed_protocols(int from_user)
735{
736 long allowed_protocols = 0;
737 if (is_transport_allowed("http", from_user))
739 allowed_protocols |= CURLPROTO_HTTP;
740 if (is_transport_allowed("https", from_user))
741 allowed_protocols |= CURLPROTO_HTTPS;
742 if (is_transport_allowed("ftp", from_user))
743 allowed_protocols |= CURLPROTO_FTP;
744 if (is_transport_allowed("ftps", from_user))
745 allowed_protocols |= CURLPROTO_FTPS;
746 return allowed_protocols;
748}
749#endif
750static CURL *get_curl_handle(void)
752{
753 CURL *result = curl_easy_init();
754 if (!result)
756 die("curl_easy_init failed");
757 if (!curl_ssl_verify) {
759 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
760 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
761 } else {
762 /* Verify authenticity of the peer's certificate */
763 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
764 /* The name in the cert must match whom we tried to connect */
765 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
766 }
767#if LIBCURL_VERSION_NUM >= 0x070907
769 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
770#endif
771#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
772 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
773#endif
774#ifdef CURLGSSAPI_DELEGATION_FLAG
776 if (curl_deleg) {
777 int i;
778 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
779 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
780 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
781 curl_deleg_levels[i].curl_deleg_param);
782 break;
783 }
784 }
785 if (i == ARRAY_SIZE(curl_deleg_levels))
786 warning("Unknown delegation method '%s': using default",
787 curl_deleg);
788 }
789#endif
790 if (http_proactive_auth)
792 init_curl_http_auth(result);
793 if (getenv("GIT_SSL_VERSION"))
795 ssl_version = getenv("GIT_SSL_VERSION");
796 if (ssl_version && *ssl_version) {
797 int i;
798 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
799 if (!strcmp(ssl_version, sslversions[i].name)) {
800 curl_easy_setopt(result, CURLOPT_SSLVERSION,
801 sslversions[i].ssl_version);
802 break;
803 }
804 }
805 if (i == ARRAY_SIZE(sslversions))
806 warning("unsupported ssl version %s: using default",
807 ssl_version);
808 }
809 if (getenv("GIT_SSL_CIPHER_LIST"))
811 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
812 if (ssl_cipherlist != NULL && *ssl_cipherlist)
813 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
814 ssl_cipherlist);
815 if (ssl_cert != NULL)
817 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
818 if (has_cert_password())
819 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
820#if LIBCURL_VERSION_NUM >= 0x070903
821 if (ssl_key != NULL)
822 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
823#endif
824#if LIBCURL_VERSION_NUM >= 0x070908
825 if (ssl_capath != NULL)
826 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
827#endif
828#if LIBCURL_VERSION_NUM >= 0x072c00
829 if (ssl_pinnedkey != NULL)
830 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
831#endif
832 if (ssl_cainfo != NULL)
833 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
834 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
836 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
837 curl_low_speed_limit);
838 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
839 curl_low_speed_time);
840 }
841 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
843#if LIBCURL_VERSION_NUM >= 0x071301
844 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
845#elif LIBCURL_VERSION_NUM >= 0x071101
846 curl_easy_setopt(result, CURLOPT_POST301, 1);
847#endif
848#ifdef CURLPROTO_HTTP
849 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
850 get_curl_allowed_protocols(0));
851 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
852 get_curl_allowed_protocols(-1));
853#else
854 warning("protocol restrictions not applied to curl redirects because\n"
855 "your curl version is too old (>= 7.19.4)");
856#endif
857 if (getenv("GIT_CURL_VERBOSE"))
858 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
859 setup_curl_trace(result);
860 if (getenv("GIT_REDACT_COOKIES")) {
861 string_list_split(&cookies_to_redact,
862 getenv("GIT_REDACT_COOKIES"), ',', -1);
863 string_list_sort(&cookies_to_redact);
864 }
865 curl_easy_setopt(result, CURLOPT_USERAGENT,
867 user_agent ? user_agent : git_user_agent());
868 if (curl_ftp_no_epsv)
870 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
871#ifdef CURLOPT_USE_SSL
873 if (curl_ssl_try)
874 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
875#endif
876 /*
878 * CURL also examines these variables as a fallback; but we need to query
879 * them here in order to decide whether to prompt for missing password (cf.
880 * init_curl_proxy_auth()).
881 *
882 * Unlike many other common environment variables, these are historically
883 * lowercase only. It appears that CURL did not know this and implemented
884 * only uppercase variants, which was later corrected to take both - with
885 * the exception of http_proxy, which is lowercase only also in CURL. As
886 * the lowercase versions are the historical quasi-standard, they take
887 * precedence here, as in CURL.
888 */
889 if (!curl_http_proxy) {
890 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
891 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
892 var_override(&curl_http_proxy, getenv("https_proxy"));
893 } else {
894 var_override(&curl_http_proxy, getenv("http_proxy"));
895 }
896 if (!curl_http_proxy) {
897 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
898 var_override(&curl_http_proxy, getenv("all_proxy"));
899 }
900 }
901 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
903 /*
904 * Handle case with the empty http.proxy value here to keep
905 * common code clean.
906 * NB: empty option disables proxying at all.
907 */
908 curl_easy_setopt(result, CURLOPT_PROXY, "");
909 } else if (curl_http_proxy) {
910#if LIBCURL_VERSION_NUM >= 0x071800
911 if (starts_with(curl_http_proxy, "socks5h"))
912 curl_easy_setopt(result,
913 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
914 else if (starts_with(curl_http_proxy, "socks5"))
915 curl_easy_setopt(result,
916 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
917 else if (starts_with(curl_http_proxy, "socks4a"))
918 curl_easy_setopt(result,
919 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
920 else if (starts_with(curl_http_proxy, "socks"))
921 curl_easy_setopt(result,
922 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
923#endif
924#if LIBCURL_VERSION_NUM >= 0x073400
925 else if (starts_with(curl_http_proxy, "https"))
926 curl_easy_setopt(result,
927 CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
928#endif
929 if (strstr(curl_http_proxy, "://"))
930 credential_from_url(&proxy_auth, curl_http_proxy);
931 else {
932 struct strbuf url = STRBUF_INIT;
933 strbuf_addf(&url, "http://%s", curl_http_proxy);
934 credential_from_url(&proxy_auth, url.buf);
935 strbuf_release(&url);
936 }
937 if (!proxy_auth.host)
939 die("Invalid proxy URL '%s'", curl_http_proxy);
940 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
942#if LIBCURL_VERSION_NUM >= 0x071304
943 var_override(&curl_no_proxy, getenv("NO_PROXY"));
944 var_override(&curl_no_proxy, getenv("no_proxy"));
945 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
946#endif
947 }
948 init_curl_proxy_auth(result);
949 set_curl_keepalive(result);
951 return result;
953}
954static void set_from_env(const char **var, const char *envname)
956{
957 const char *val = getenv(envname);
958 if (val)
959 *var = val;
960}
961static void protocol_http_header(void)
963{
964 if (get_protocol_version_config() > 0) {
965 struct strbuf protocol_header = STRBUF_INIT;
966 strbuf_addf(&protocol_header, GIT_PROTOCOL_HEADER ": version=%d",
968 get_protocol_version_config());
969 extra_http_headers = curl_slist_append(extra_http_headers,
972 protocol_header.buf);
973 strbuf_release(&protocol_header);
974 }
975}
976void http_init(struct remote *remote, const char *url, int proactive_auth)
978{
979 char *low_speed_limit;
980 char *low_speed_time;
981 char *normalized_url;
982 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
983 config.section = "http";
985 config.key = NULL;
986 config.collect_fn = http_options;
987 config.cascade_fn = git_default_config;
988 config.cb = NULL;
989 http_is_verbose = 0;
991 normalized_url = url_normalize(url, &config.url);
992 git_config(urlmatch_config_entry, &config);
994 free(normalized_url);
995 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
997 die("curl_global_init failed");
998 http_proactive_auth = proactive_auth;
1000 if (remote && remote->http_proxy)
1002 curl_http_proxy = xstrdup(remote->http_proxy);
1003 if (remote)
1005 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1006 protocol_http_header();
1008 pragma_header = curl_slist_append(http_copy_default_headers(),
1010 "Pragma: no-cache");
1011 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1012 "Pragma:");
1013#ifdef USE_CURL_MULTI
1015 {
1016 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1017 if (http_max_requests != NULL)
1018 max_requests = atoi(http_max_requests);
1019 }
1020 curlm = curl_multi_init();
1022 if (!curlm)
1023 die("curl_multi_init failed");
1024#endif
1025 if (getenv("GIT_SSL_NO_VERIFY"))
1027 curl_ssl_verify = 0;
1028 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1030#if LIBCURL_VERSION_NUM >= 0x070903
1031 set_from_env(&ssl_key, "GIT_SSL_KEY");
1032#endif
1033#if LIBCURL_VERSION_NUM >= 0x070908
1034 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1035#endif
1036 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1037 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1039 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1041 if (low_speed_limit != NULL)
1042 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1043 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1044 if (low_speed_time != NULL)
1045 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1046 if (curl_ssl_verify == -1)
1048 curl_ssl_verify = 1;
1049 curl_session_count = 0;
1051#ifdef USE_CURL_MULTI
1052 if (max_requests < 1)
1053 max_requests = DEFAULT_MAX_REQUESTS;
1054#endif
1055 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1057 curl_ftp_no_epsv = 1;
1058 if (url) {
1060 credential_from_url(&http_auth, url);
1061 if (!ssl_cert_password_required &&
1062 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1063 starts_with(url, "https://"))
1064 ssl_cert_password_required = 1;
1065 }
1066#ifndef NO_CURL_EASY_DUPHANDLE
1068 curl_default = get_curl_handle();
1069#endif
1070}
1071void http_cleanup(void)
1073{
1074 struct active_request_slot *slot = active_queue_head;
1075 while (slot != NULL) {
1077 struct active_request_slot *next = slot->next;
1078 if (slot->curl != NULL) {
1079 xmulti_remove_handle(slot);
1080 curl_easy_cleanup(slot->curl);
1081 }
1082 free(slot);
1083 slot = next;
1084 }
1085 active_queue_head = NULL;
1086#ifndef NO_CURL_EASY_DUPHANDLE
1088 curl_easy_cleanup(curl_default);
1089#endif
1090#ifdef USE_CURL_MULTI
1092 curl_multi_cleanup(curlm);
1093#endif
1094 curl_global_cleanup();
1095 curl_slist_free_all(extra_http_headers);
1097 extra_http_headers = NULL;
1098 curl_slist_free_all(pragma_header);
1100 pragma_header = NULL;
1101 curl_slist_free_all(no_pragma_header);
1103 no_pragma_header = NULL;
1104 if (curl_http_proxy) {
1106 free((void *)curl_http_proxy);
1107 curl_http_proxy = NULL;
1108 }
1109 if (proxy_auth.password) {
1111 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1112 FREE_AND_NULL(proxy_auth.password);
1113 }
1114 free((void *)curl_proxyuserpwd);
1116 curl_proxyuserpwd = NULL;
1117 free((void *)http_proxy_authmethod);
1119 http_proxy_authmethod = NULL;
1120 if (cert_auth.password != NULL) {
1122 memset(cert_auth.password, 0, strlen(cert_auth.password));
1123 FREE_AND_NULL(cert_auth.password);
1124 }
1125 ssl_cert_password_required = 0;
1126 FREE_AND_NULL(cached_accept_language);
1128}
1129struct active_request_slot *get_active_slot(void)
1131{
1132 struct active_request_slot *slot = active_queue_head;
1133 struct active_request_slot *newslot;
1134#ifdef USE_CURL_MULTI
1136 int num_transfers;
1137 /* Wait for a slot to open up if the queue is full */
1139 while (active_requests >= max_requests) {
1140 curl_multi_perform(curlm, &num_transfers);
1141 if (num_transfers < active_requests)
1142 process_curl_messages();
1143 }
1144#endif
1145 while (slot != NULL && slot->in_use)
1147 slot = slot->next;
1148 if (slot == NULL) {
1150 newslot = xmalloc(sizeof(*newslot));
1151 newslot->curl = NULL;
1152 newslot->in_use = 0;
1153 newslot->next = NULL;
1154 slot = active_queue_head;
1156 if (slot == NULL) {
1157 active_queue_head = newslot;
1158 } else {
1159 while (slot->next != NULL)
1160 slot = slot->next;
1161 slot->next = newslot;
1162 }
1163 slot = newslot;
1164 }
1165 if (slot->curl == NULL) {
1167#ifdef NO_CURL_EASY_DUPHANDLE
1168 slot->curl = get_curl_handle();
1169#else
1170 slot->curl = curl_easy_duphandle(curl_default);
1171#endif
1172 curl_session_count++;
1173 }
1174 active_requests++;
1176 slot->in_use = 1;
1177 slot->results = NULL;
1178 slot->finished = NULL;
1179 slot->callback_data = NULL;
1180 slot->callback_func = NULL;
1181 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1182 if (curl_save_cookies)
1183 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1184 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1185 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1186 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1187 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1188 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1189 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1190 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1191 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1192 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1193 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1194 /*
1196 * Default following to off unless "ALWAYS" is configured; this gives
1197 * callers a sane starting point, and they can tweak for individual
1198 * HTTP_FOLLOW_* cases themselves.
1199 */
1200 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1201 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1202 else
1203 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1204#if LIBCURL_VERSION_NUM >= 0x070a08
1206 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1207#endif
1208#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1209 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1210#endif
1211 if (http_auth.password || curl_empty_auth_enabled())
1212 init_curl_http_auth(slot->curl);
1213 return slot;
1215}
1216int start_active_slot(struct active_request_slot *slot)
1218{
1219#ifdef USE_CURL_MULTI
1220 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1221 int num_transfers;
1222 if (curlm_result != CURLM_OK &&
1224 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1225 warning("curl_multi_add_handle failed: %s",
1226 curl_multi_strerror(curlm_result));
1227 active_requests--;
1228 slot->in_use = 0;
1229 return 0;
1230 }
1231 /*
1233 * We know there must be something to do, since we just added
1234 * something.
1235 */
1236 curl_multi_perform(curlm, &num_transfers);
1237#endif
1238 return 1;
1239}
1240#ifdef USE_CURL_MULTI
1242struct fill_chain {
1243 void *data;
1244 int (*fill)(void *);
1245 struct fill_chain *next;
1246};
1247static struct fill_chain *fill_cfg;
1249void add_fill_function(void *data, int (*fill)(void *))
1251{
1252 struct fill_chain *new = xmalloc(sizeof(*new));
1253 struct fill_chain **linkp = &fill_cfg;
1254 new->data = data;
1255 new->fill = fill;
1256 new->next = NULL;
1257 while (*linkp)
1258 linkp = &(*linkp)->next;
1259 *linkp = new;
1260}
1261void fill_active_slots(void)
1263{
1264 struct active_request_slot *slot = active_queue_head;
1265 while (active_requests < max_requests) {
1267 struct fill_chain *fill;
1268 for (fill = fill_cfg; fill; fill = fill->next)
1269 if (fill->fill(fill->data))
1270 break;
1271 if (!fill)
1273 break;
1274 }
1275 while (slot != NULL) {
1277 if (!slot->in_use && slot->curl != NULL
1278 && curl_session_count > min_curl_sessions) {
1279 curl_easy_cleanup(slot->curl);
1280 slot->curl = NULL;
1281 curl_session_count--;
1282 }
1283 slot = slot->next;
1284 }
1285}
1286void step_active_slots(void)
1288{
1289 int num_transfers;
1290 CURLMcode curlm_result;
1291 do {
1293 curlm_result = curl_multi_perform(curlm, &num_transfers);
1294 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1295 if (num_transfers < active_requests) {
1296 process_curl_messages();
1297 fill_active_slots();
1298 }
1299}
1300#endif
1301void run_active_slot(struct active_request_slot *slot)
1303{
1304#ifdef USE_CURL_MULTI
1305 fd_set readfds;
1306 fd_set writefds;
1307 fd_set excfds;
1308 int max_fd;
1309 struct timeval select_timeout;
1310 int finished = 0;
1311 slot->finished = &finished;
1313 while (!finished) {
1314 step_active_slots();
1315 if (slot->in_use) {
1317#if LIBCURL_VERSION_NUM >= 0x070f04
1318 long curl_timeout;
1319 curl_multi_timeout(curlm, &curl_timeout);
1320 if (curl_timeout == 0) {
1321 continue;
1322 } else if (curl_timeout == -1) {
1323 select_timeout.tv_sec = 0;
1324 select_timeout.tv_usec = 50000;
1325 } else {
1326 select_timeout.tv_sec = curl_timeout / 1000;
1327 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1328 }
1329#else
1330 select_timeout.tv_sec = 0;
1331 select_timeout.tv_usec = 50000;
1332#endif
1333 max_fd = -1;
1335 FD_ZERO(&readfds);
1336 FD_ZERO(&writefds);
1337 FD_ZERO(&excfds);
1338 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1339 /*
1341 * It can happen that curl_multi_timeout returns a pathologically
1342 * long timeout when curl_multi_fdset returns no file descriptors
1343 * to read. See commit message for more details.
1344 */
1345 if (max_fd < 0 &&
1346 (select_timeout.tv_sec > 0 ||
1347 select_timeout.tv_usec > 50000)) {
1348 select_timeout.tv_sec = 0;
1349 select_timeout.tv_usec = 50000;
1350 }
1351 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1353 }
1354 }
1355#else
1356 while (slot->in_use) {
1357 slot->curl_result = curl_easy_perform(slot->curl);
1358 finish_active_slot(slot);
1359 }
1360#endif
1361}
1362static void release_active_slot(struct active_request_slot *slot)
1364{
1365 closedown_active_slot(slot);
1366 if (slot->curl) {
1367 xmulti_remove_handle(slot);
1368 if (curl_session_count > min_curl_sessions) {
1369 curl_easy_cleanup(slot->curl);
1370 slot->curl = NULL;
1371 curl_session_count--;
1372 }
1373 }
1374#ifdef USE_CURL_MULTI
1375 fill_active_slots();
1376#endif
1377}
1378void finish_all_active_slots(void)
1380{
1381 struct active_request_slot *slot = active_queue_head;
1382 while (slot != NULL)
1384 if (slot->in_use) {
1385 run_active_slot(slot);
1386 slot = active_queue_head;
1387 } else {
1388 slot = slot->next;
1389 }
1390}
1391/* Helpers for modifying and creating URLs */
1393static inline int needs_quote(int ch)
1394{
1395 if (((ch >= 'A') && (ch <= 'Z'))
1396 || ((ch >= 'a') && (ch <= 'z'))
1397 || ((ch >= '0') && (ch <= '9'))
1398 || (ch == '/')
1399 || (ch == '-')
1400 || (ch == '.'))
1401 return 0;
1402 return 1;
1403}
1404static char *quote_ref_url(const char *base, const char *ref)
1406{
1407 struct strbuf buf = STRBUF_INIT;
1408 const char *cp;
1409 int ch;
1410 end_url_with_slash(&buf, base);
1412 for (cp = ref; (ch = *cp) != 0; cp++)
1414 if (needs_quote(ch))
1415 strbuf_addf(&buf, "%%%02x", ch);
1416 else
1417 strbuf_addch(&buf, *cp);
1418 return strbuf_detach(&buf, NULL);
1420}
1421void append_remote_object_url(struct strbuf *buf, const char *url,
1423 const char *hex,
1424 int only_two_digit_prefix)
1425{
1426 end_url_with_slash(buf, url);
1427 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1429 if (!only_two_digit_prefix)
1430 strbuf_addstr(buf, hex + 2);
1431}
1432char *get_remote_object_url(const char *url, const char *hex,
1434 int only_two_digit_prefix)
1435{
1436 struct strbuf buf = STRBUF_INIT;
1437 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1438 return strbuf_detach(&buf, NULL);
1439}
1440static int handle_curl_result(struct slot_results *results)
1442{
1443 /*
1444 * If we see a failing http code with CURLE_OK, we have turned off
1445 * FAILONERROR (to keep the server's custom error response), and should
1446 * translate the code into failure here.
1447 *
1448 * Likewise, if we see a redirect (30x code), that means we turned off
1449 * redirect-following, and we should treat the result as an error.
1450 */
1451 if (results->curl_result == CURLE_OK &&
1452 results->http_code >= 300) {
1453 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1454 /*
1455 * Normally curl will already have put the "reason phrase"
1456 * from the server into curl_errorstr; unfortunately without
1457 * FAILONERROR it is lost, so we can give only the numeric
1458 * status code.
1459 */
1460 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1461 "The requested URL returned error: %ld",
1462 results->http_code);
1463 }
1464 if (results->curl_result == CURLE_OK) {
1466 credential_approve(&http_auth);
1467 if (proxy_auth.password)
1468 credential_approve(&proxy_auth);
1469 return HTTP_OK;
1470 } else if (missing_target(results))
1471 return HTTP_MISSING_TARGET;
1472 else if (results->http_code == 401) {
1473 if (http_auth.username && http_auth.password) {
1474 credential_reject(&http_auth);
1475 return HTTP_NOAUTH;
1476 } else {
1477#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1478 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1479 if (results->auth_avail) {
1480 http_auth_methods &= results->auth_avail;
1481 http_auth_methods_restricted = 1;
1482 }
1483#endif
1484 return HTTP_REAUTH;
1485 }
1486 } else {
1487 if (results->http_connectcode == 407)
1488 credential_reject(&proxy_auth);
1489#if LIBCURL_VERSION_NUM >= 0x070c00
1490 if (!curl_errorstr[0])
1491 strlcpy(curl_errorstr,
1492 curl_easy_strerror(results->curl_result),
1493 sizeof(curl_errorstr));
1494#endif
1495 return HTTP_ERROR;
1496 }
1497}
1498int run_one_slot(struct active_request_slot *slot,
1500 struct slot_results *results)
1501{
1502 slot->results = results;
1503 if (!start_active_slot(slot)) {
1504 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1505 "failed to start HTTP request");
1506 return HTTP_START_FAILED;
1507 }
1508 run_active_slot(slot);
1510 return handle_curl_result(results);
1511}
1512struct curl_slist *http_copy_default_headers(void)
1514{
1515 struct curl_slist *headers = NULL, *h;
1516 for (h = extra_http_headers; h; h = h->next)
1518 headers = curl_slist_append(headers, h->data);
1519 return headers;
1521}
1522static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1524{
1525 char *ptr;
1526 CURLcode ret;
1527 strbuf_reset(buf);
1529 ret = curl_easy_getinfo(curl, info, &ptr);
1530 if (!ret && ptr)
1531 strbuf_addstr(buf, ptr);
1532 return ret;
1533}
1534/*
1536 * Check for and extract a content-type parameter. "raw"
1537 * should be positioned at the start of the potential
1538 * parameter, with any whitespace already removed.
1539 *
1540 * "name" is the name of the parameter. The value is appended
1541 * to "out".
1542 */
1543static int extract_param(const char *raw, const char *name,
1544 struct strbuf *out)
1545{
1546 size_t len = strlen(name);
1547 if (strncasecmp(raw, name, len))
1549 return -1;
1550 raw += len;
1551 if (*raw != '=')
1553 return -1;
1554 raw++;
1555 while (*raw && !isspace(*raw) && *raw != ';')
1557 strbuf_addch(out, *raw++);
1558 return 0;
1559}
1560/*
1562 * Extract a normalized version of the content type, with any
1563 * spaces suppressed, all letters lowercased, and no trailing ";"
1564 * or parameters.
1565 *
1566 * Note that we will silently remove even invalid whitespace. For
1567 * example, "text / plain" is specifically forbidden by RFC 2616,
1568 * but "text/plain" is the only reasonable output, and this keeps
1569 * our code simple.
1570 *
1571 * If the "charset" argument is not NULL, store the value of any
1572 * charset parameter there.
1573 *
1574 * Example:
1575 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1576 * "text / plain" -> "text/plain"
1577 */
1578static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1579 struct strbuf *charset)
1580{
1581 const char *p;
1582 strbuf_reset(type);
1584 strbuf_grow(type, raw->len);
1585 for (p = raw->buf; *p; p++) {
1586 if (isspace(*p))
1587 continue;
1588 if (*p == ';') {
1589 p++;
1590 break;
1591 }
1592 strbuf_addch(type, tolower(*p));
1593 }
1594 if (!charset)
1596 return;
1597 strbuf_reset(charset);
1599 while (*p) {
1600 while (isspace(*p) || *p == ';')
1601 p++;
1602 if (!extract_param(p, "charset", charset))
1603 return;
1604 while (*p && !isspace(*p))
1605 p++;
1606 }
1607 if (!charset->len && starts_with(type->buf, "text/"))
1609 strbuf_addstr(charset, "ISO-8859-1");
1610}
1611static void write_accept_language(struct strbuf *buf)
1613{
1614 /*
1615 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1616 * that, q-value will be smaller than 0.001, the minimum q-value the
1617 * HTTP specification allows. See
1618 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1619 */
1620 const int MAX_DECIMAL_PLACES = 3;
1621 const int MAX_LANGUAGE_TAGS = 1000;
1622 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1623 char **language_tags = NULL;
1624 int num_langs = 0;
1625 const char *s = get_preferred_languages();
1626 int i;
1627 struct strbuf tag = STRBUF_INIT;
1628 /* Don't add Accept-Language header if no language is preferred. */
1630 if (!s)
1631 return;
1632 /*
1634 * Split the colon-separated string of preferred languages into
1635 * language_tags array.
1636 */
1637 do {
1638 /* collect language tag */
1639 for (; *s && (isalnum(*s) || *s == '_'); s++)
1640 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1641 /* skip .codeset, @modifier and any other unnecessary parts */
1643 while (*s && *s != ':')
1644 s++;
1645 if (tag.len) {
1647 num_langs++;
1648 REALLOC_ARRAY(language_tags, num_langs);
1649 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1650 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1651 break;
1652 }
1653 } while (*s++);
1654 /* write Accept-Language header into buf */
1656 if (num_langs) {
1657 int last_buf_len = 0;
1658 int max_q;
1659 int decimal_places;
1660 char q_format[32];
1661 /* add '*' */
1663 REALLOC_ARRAY(language_tags, num_langs + 1);
1664 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1665 /* compute decimal_places */
1667 for (max_q = 1, decimal_places = 0;
1668 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1669 decimal_places++, max_q *= 10)
1670 ;
1671 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1673 strbuf_addstr(buf, "Accept-Language: ");
1675 for (i = 0; i < num_langs; i++) {
1677 if (i > 0)
1678 strbuf_addstr(buf, ", ");
1679 strbuf_addstr(buf, language_tags[i]);
1681 if (i > 0)
1683 strbuf_addf(buf, q_format, max_q - i);
1684 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1686 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1687 break;
1688 }
1689 last_buf_len = buf->len;
1691 }
1692 }
1693 /* free language tags -- last one is a static '*' */
1695 for (i = 0; i < num_langs - 1; i++)
1696 free(language_tags[i]);
1697 free(language_tags);
1698}
1699/*
1701 * Get an Accept-Language header which indicates user's preferred languages.
1702 *
1703 * Examples:
1704 * LANGUAGE= -> ""
1705 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1706 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1707 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1708 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1709 * LANGUAGE= LANG=C -> ""
1710 */
1711static const char *get_accept_language(void)
1712{
1713 if (!cached_accept_language) {
1714 struct strbuf buf = STRBUF_INIT;
1715 write_accept_language(&buf);
1716 if (buf.len > 0)
1717 cached_accept_language = strbuf_detach(&buf, NULL);
1718 }
1719 return cached_accept_language;
1721}
1722static void http_opt_request_remainder(CURL *curl, off_t pos)
1724{
1725 char buf[128];
1726 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1727 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1728}
1729/* http_request() targets */
1731#define HTTP_REQUEST_STRBUF 0
1732#define HTTP_REQUEST_FILE 1
1733static int http_request(const char *url,
1735 void *result, int target,
1736 const struct http_get_options *options)
1737{
1738 struct active_request_slot *slot;
1739 struct slot_results results;
1740 struct curl_slist *headers = http_copy_default_headers();
1741 struct strbuf buf = STRBUF_INIT;
1742 const char *accept_language;
1743 int ret;
1744 slot = get_active_slot();
1746 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1747 if (result == NULL) {
1749 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1750 } else {
1751 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1752 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1753 if (target == HTTP_REQUEST_FILE) {
1755 off_t posn = ftello(result);
1756 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1757 fwrite);
1758 if (posn > 0)
1759 http_opt_request_remainder(slot->curl, posn);
1760 } else
1761 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1762 fwrite_buffer);
1763 }
1764 accept_language = get_accept_language();
1766 if (accept_language)
1768 headers = curl_slist_append(headers, accept_language);
1769 strbuf_addstr(&buf, "Pragma:");
1771 if (options && options->no_cache)
1772 strbuf_addstr(&buf, " no-cache");
1773 if (options && options->keep_error)
1774 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1775 if (options && options->initial_request &&
1776 http_follow_config == HTTP_FOLLOW_INITIAL)
1777 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1778 headers = curl_slist_append(headers, buf.buf);
1780 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1782 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1783 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1784 ret = run_one_slot(slot, &results);
1786 if (options && options->content_type) {
1788 struct strbuf raw = STRBUF_INIT;
1789 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1790 extract_content_type(&raw, options->content_type,
1791 options->charset);
1792 strbuf_release(&raw);
1793 }
1794 if (options && options->effective_url)
1796 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1797 options->effective_url);
1798 curl_slist_free_all(headers);
1800 strbuf_release(&buf);
1801 return ret;
1803}
1804/*
1806 * Update the "base" url to a more appropriate value, as deduced by
1807 * redirects seen when requesting a URL starting with "url".
1808 *
1809 * The "asked" parameter is a URL that we asked curl to access, and must begin
1810 * with "base".
1811 *
1812 * The "got" parameter is the URL that curl reported to us as where we ended
1813 * up.
1814 *
1815 * Returns 1 if we updated the base url, 0 otherwise.
1816 *
1817 * Our basic strategy is to compare "base" and "asked" to find the bits
1818 * specific to our request. We then strip those bits off of "got" to yield the
1819 * new base. So for example, if our base is "http://example.com/foo.git",
1820 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1821 * with "https://other.example.com/foo.git/info/refs". We would want the
1822 * new URL to become "https://other.example.com/foo.git".
1823 *
1824 * Note that this assumes a sane redirect scheme. It's entirely possible
1825 * in the example above to end up at a URL that does not even end in
1826 * "info/refs". In such a case we die. There's not much we can do, such a
1827 * scheme is unlikely to represent a real git repository, and failing to
1828 * rewrite the base opens options for malicious redirects to do funny things.
1829 */
1830static int update_url_from_redirect(struct strbuf *base,
1831 const char *asked,
1832 const struct strbuf *got)
1833{
1834 const char *tail;
1835 size_t new_len;
1836 if (!strcmp(asked, got->buf))
1838 return 0;
1839 if (!skip_prefix(asked, base->buf, &tail))
1841 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1842 asked, base->buf);
1843 new_len = got->len;
1845 if (!strip_suffix_mem(got->buf, &new_len, tail))
1846 die(_("unable to update url base from redirection:\n"
1847 " asked for: %s\n"
1848 " redirect: %s"),
1849 asked, got->buf);
1850 strbuf_reset(base);
1852 strbuf_add(base, got->buf, new_len);
1853 return 1;
1855}
1856static int http_request_reauth(const char *url,
1858 void *result, int target,
1859 struct http_get_options *options)
1860{
1861 int ret = http_request(url, result, target, options);
1862 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1864 return ret;
1865 if (options && options->effective_url && options->base_url) {
1867 if (update_url_from_redirect(options->base_url,
1868 url, options->effective_url)) {
1869 credential_from_url(&http_auth, options->base_url->buf);
1870 url = options->effective_url->buf;
1871 }
1872 }
1873 if (ret != HTTP_REAUTH)
1875 return ret;
1876 /*
1878 * If we are using KEEP_ERROR, the previous request may have
1879 * put cruft into our output stream; we should clear it out before
1880 * making our next request. We only know how to do this for
1881 * the strbuf case, but that is enough to satisfy current callers.
1882 */
1883 if (options && options->keep_error) {
1884 switch (target) {
1885 case HTTP_REQUEST_STRBUF:
1886 strbuf_reset(result);
1887 break;
1888 default:
1889 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1890 }
1891 }
1892 credential_fill(&http_auth);
1894 return http_request(url, result, target, options);
1896}
1897int http_get_strbuf(const char *url,
1899 struct strbuf *result,
1900 struct http_get_options *options)
1901{
1902 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1903}
1904/*
1906 * Downloads a URL and stores the result in the given file.
1907 *
1908 * If a previous interrupted download is detected (i.e. a previous temporary
1909 * file is still around) the download is resumed.
1910 */
1911static int http_get_file(const char *url, const char *filename,
1912 struct http_get_options *options)
1913{
1914 int ret;
1915 struct strbuf tmpfile = STRBUF_INIT;
1916 FILE *result;
1917 strbuf_addf(&tmpfile, "%s.temp", filename);
1919 result = fopen(tmpfile.buf, "a");
1920 if (!result) {
1921 error("Unable to open local file %s", tmpfile.buf);
1922 ret = HTTP_ERROR;
1923 goto cleanup;
1924 }
1925 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1927 fclose(result);
1928 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1930 ret = HTTP_ERROR;
1931cleanup:
1932 strbuf_release(&tmpfile);
1933 return ret;
1934}
1935int http_fetch_ref(const char *base, struct ref *ref)
1937{
1938 struct http_get_options options = {0};
1939 char *url;
1940 struct strbuf buffer = STRBUF_INIT;
1941 int ret = -1;
1942 options.no_cache = 1;
1944 url = quote_ref_url(base, ref->name);
1946 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1947 strbuf_rtrim(&buffer);
1948 if (buffer.len == 40)
1949 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1950 else if (starts_with(buffer.buf, "ref: ")) {
1951 ref->symref = xstrdup(buffer.buf + 5);
1952 ret = 0;
1953 }
1954 }
1955 strbuf_release(&buffer);
1957 free(url);
1958 return ret;
1959}
1960/* Helpers for fetching packs */
1962static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1963{
1964 char *url, *tmp;
1965 struct strbuf buf = STRBUF_INIT;
1966 if (http_is_verbose)
1968 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1969 end_url_with_slash(&buf, base_url);
1971 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1972 url = strbuf_detach(&buf, NULL);
1973 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1975 tmp = strbuf_detach(&buf, NULL);
1976 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1978 error("Unable to get pack index %s", url);
1979 FREE_AND_NULL(tmp);
1980 }
1981 free(url);
1983 return tmp;
1984}
1985static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1987 unsigned char *sha1, const char *base_url)
1988{
1989 struct packed_git *new_pack;
1990 char *tmp_idx = NULL;
1991 int ret;
1992 if (has_pack_index(sha1)) {
1994 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1995 if (!new_pack)
1996 return -1; /* parse_pack_index() already issued error message */
1997 goto add_pack;
1998 }
1999 tmp_idx = fetch_pack_index(sha1, base_url);
2001 if (!tmp_idx)
2002 return -1;
2003 new_pack = parse_pack_index(sha1, tmp_idx);
2005 if (!new_pack) {
2006 unlink(tmp_idx);
2007 free(tmp_idx);
2008 return -1; /* parse_pack_index() already issued error message */
2010 }
2011 ret = verify_pack_index(new_pack);
2013 if (!ret) {
2014 close_pack_index(new_pack);
2015 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2016 }
2017 free(tmp_idx);
2018 if (ret)
2019 return -1;
2020add_pack:
2022 new_pack->next = *packs_head;
2023 *packs_head = new_pack;
2024 return 0;
2025}
2026int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2028{
2029 struct http_get_options options = {0};
2030 int ret = 0, i = 0;
2031 char *url, *data;
2032 struct strbuf buf = STRBUF_INIT;
2033 unsigned char sha1[20];
2034 end_url_with_slash(&buf, base_url);
2036 strbuf_addstr(&buf, "objects/info/packs");
2037 url = strbuf_detach(&buf, NULL);
2038 options.no_cache = 1;
2040 ret = http_get_strbuf(url, &buf, &options);
2041 if (ret != HTTP_OK)
2042 goto cleanup;
2043 data = buf.buf;
2045 while (i < buf.len) {
2046 switch (data[i]) {
2047 case 'P':
2048 i++;
2049 if (i + 52 <= buf.len &&
2050 starts_with(data + i, " pack-") &&
2051 starts_with(data + i + 46, ".pack\n")) {
2052 get_sha1_hex(data + i + 6, sha1);
2053 fetch_and_setup_pack_index(packs_head, sha1,
2054 base_url);
2055 i += 51;
2056 break;
2057 }
2058 default:
2059 while (i < buf.len && data[i] != '\n')
2060 i++;
2061 }
2062 i++;
2063 }
2064cleanup:
2066 free(url);
2067 return ret;
2068}
2069void release_http_pack_request(struct http_pack_request *preq)
2071{
2072 if (preq->packfile != NULL) {
2073 fclose(preq->packfile);
2074 preq->packfile = NULL;
2075 }
2076 preq->slot = NULL;
2077 free(preq->url);
2078 free(preq);
2079}
2080int finish_http_pack_request(struct http_pack_request *preq)
2082{
2083 struct packed_git **lst;
2084 struct packed_git *p = preq->target;
2085 char *tmp_idx;
2086 size_t len;
2087 struct child_process ip = CHILD_PROCESS_INIT;
2088 close_pack_index(p);
2090 fclose(preq->packfile);
2092 preq->packfile = NULL;
2093 lst = preq->lst;
2095 while (*lst != p)
2096 lst = &((*lst)->next);
2097 *lst = (*lst)->next;
2098 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2100 die("BUG: pack tmpfile does not end in .pack.temp?");
2101 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2102 argv_array_push(&ip.args, "index-pack");
2104 argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
2105 argv_array_push(&ip.args, preq->tmpfile);
2106 ip.git_cmd = 1;
2107 ip.no_stdin = 1;
2108 ip.no_stdout = 1;
2109 if (run_command(&ip)) {
2111 unlink(preq->tmpfile);
2112 unlink(tmp_idx);
2113 free(tmp_idx);
2114 return -1;
2115 }
2116 unlink(sha1_pack_index_name(p->sha1));
2118 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2120 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2121 free(tmp_idx);
2122 return -1;
2123 }
2124 install_packed_git(p);
2126 free(tmp_idx);
2127 return 0;
2128}
2129struct http_pack_request *new_http_pack_request(
2131 struct packed_git *target, const char *base_url)
2132{
2133 off_t prev_posn = 0;
2134 struct strbuf buf = STRBUF_INIT;
2135 struct http_pack_request *preq;
2136 preq = xcalloc(1, sizeof(*preq));
2138 preq->target = target;
2139 end_url_with_slash(&buf, base_url);
2141 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2142 sha1_to_hex(target->sha1));
2143 preq->url = strbuf_detach(&buf, NULL);
2144 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2146 sha1_pack_name(target->sha1));
2147 preq->packfile = fopen(preq->tmpfile, "a");
2148 if (!preq->packfile) {
2149 error("Unable to open local file %s for pack",
2150 preq->tmpfile);
2151 goto abort;
2152 }
2153 preq->slot = get_active_slot();
2155 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2156 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2157 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2158 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2159 no_pragma_header);
2160 /*
2162 * If there is data present from a previous transfer attempt,
2163 * resume where it left off
2164 */
2165 prev_posn = ftello(preq->packfile);
2166 if (prev_posn>0) {
2167 if (http_is_verbose)
2168 fprintf(stderr,
2169 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2170 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2171 http_opt_request_remainder(preq->slot->curl, prev_posn);
2172 }
2173 return preq;
2175abort:
2177 free(preq->url);
2178 free(preq);
2179 return NULL;
2180}
2181/* Helpers for fetching objects (loose) */
2183static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2184 void *data)
2185{
2186 unsigned char expn[4096];
2187 size_t size = eltsize * nmemb;
2188 int posn = 0;
2189 struct http_object_request *freq = data;
2190 struct active_request_slot *slot = freq->slot;
2191 if (slot) {
2193 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2194 &slot->http_code);
2195 if (c != CURLE_OK)
2196 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2197 curl_easy_strerror(c));
2198 if (slot->http_code >= 300)
2199 return size;
2200 }
2201 do {
2203 ssize_t retval = xwrite(freq->localfile,
2204 (char *) ptr + posn, size - posn);
2205 if (retval < 0)
2206 return posn;
2207 posn += retval;
2208 } while (posn < size);
2209 freq->stream.avail_in = size;
2211 freq->stream.next_in = (void *)ptr;
2212 do {
2213 freq->stream.next_out = expn;
2214 freq->stream.avail_out = sizeof(expn);
2215 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2216 git_SHA1_Update(&freq->c, expn,
2217 sizeof(expn) - freq->stream.avail_out);
2218 } while (freq->stream.avail_in && freq->zret == Z_OK);
2219 return size;
2220}
2221struct http_object_request *new_http_object_request(const char *base_url,
2223 unsigned char *sha1)
2224{
2225 char *hex = sha1_to_hex(sha1);
2226 const char *filename;
2227 char prevfile[PATH_MAX];
2228 int prevlocal;
2229 char prev_buf[PREV_BUF_SIZE];
2230 ssize_t prev_read = 0;
2231 off_t prev_posn = 0;
2232 struct http_object_request *freq;
2233 freq = xcalloc(1, sizeof(*freq));
2235 hashcpy(freq->sha1, sha1);
2236 freq->localfile = -1;
2237 filename = sha1_file_name(sha1);
2239 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2240 "%s.temp", filename);
2241 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2243 unlink_or_warn(prevfile);
2244 rename(freq->tmpfile, prevfile);
2245 unlink_or_warn(freq->tmpfile);
2246 if (freq->localfile != -1)
2248 error("fd leakage in start: %d", freq->localfile);
2249 freq->localfile = open(freq->tmpfile,
2250 O_WRONLY | O_CREAT | O_EXCL, 0666);
2251 /*
2252 * This could have failed due to the "lazy directory creation";
2253 * try to mkdir the last path component.
2254 */
2255 if (freq->localfile < 0 && errno == ENOENT) {
2256 char *dir = strrchr(freq->tmpfile, '/');
2257 if (dir) {
2258 *dir = 0;
2259 mkdir(freq->tmpfile, 0777);
2260 *dir = '/';
2261 }
2262 freq->localfile = open(freq->tmpfile,
2263 O_WRONLY | O_CREAT | O_EXCL, 0666);
2264 }
2265 if (freq->localfile < 0) {
2267 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2268 goto abort;
2269 }
2270 git_inflate_init(&freq->stream);
2272 git_SHA1_Init(&freq->c);
2274 freq->url = get_remote_object_url(base_url, hex, 0);
2276 /*
2278 * If a previous temp file is present, process what was already
2279 * fetched.
2280 */
2281 prevlocal = open(prevfile, O_RDONLY);
2282 if (prevlocal != -1) {
2283 do {
2284 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2285 if (prev_read>0) {
2286 if (fwrite_sha1_file(prev_buf,
2287 1,
2288 prev_read,
2289 freq) == prev_read) {
2290 prev_posn += prev_read;
2291 } else {
2292 prev_read = -1;
2293 }
2294 }
2295 } while (prev_read > 0);
2296 close(prevlocal);
2297 }
2298 unlink_or_warn(prevfile);
2299 /*
2301 * Reset inflate/SHA1 if there was an error reading the previous temp
2302 * file; also rewind to the beginning of the local file.
2303 */
2304 if (prev_read == -1) {
2305 memset(&freq->stream, 0, sizeof(freq->stream));
2306 git_inflate_init(&freq->stream);
2307 git_SHA1_Init(&freq->c);
2308 if (prev_posn>0) {
2309 prev_posn = 0;
2310 lseek(freq->localfile, 0, SEEK_SET);
2311 if (ftruncate(freq->localfile, 0) < 0) {
2312 error_errno("Couldn't truncate temporary file %s",
2313 freq->tmpfile);
2314 goto abort;
2315 }
2316 }
2317 }
2318 freq->slot = get_active_slot();
2320 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2322 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2323 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2324 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2325 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2326 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2327 /*
2329 * If we have successfully processed data from a previous fetch
2330 * attempt, only fetch the data we don't already have.
2331 */
2332 if (prev_posn>0) {
2333 if (http_is_verbose)
2334 fprintf(stderr,
2335 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2336 hex, (uintmax_t)prev_posn);
2337 http_opt_request_remainder(freq->slot->curl, prev_posn);
2338 }
2339 return freq;
2341abort:
2343 free(freq->url);
2344 free(freq);
2345 return NULL;
2346}
2347void process_http_object_request(struct http_object_request *freq)
2349{
2350 if (freq->slot == NULL)
2351 return;
2352 freq->curl_result = freq->slot->curl_result;
2353 freq->http_code = freq->slot->http_code;
2354 freq->slot = NULL;
2355}
2356int finish_http_object_request(struct http_object_request *freq)
2358{
2359 struct stat st;
2360 close(freq->localfile);
2362 freq->localfile = -1;
2363 process_http_object_request(freq);
2365 if (freq->http_code == 416) {
2367 warning("requested range invalid; we may already have all the data.");
2368 } else if (freq->curl_result != CURLE_OK) {
2369 if (stat(freq->tmpfile, &st) == 0)
2370 if (st.st_size == 0)
2371 unlink_or_warn(freq->tmpfile);
2372 return -1;
2373 }
2374 git_inflate_end(&freq->stream);
2376 git_SHA1_Final(freq->real_sha1, &freq->c);
2377 if (freq->zret != Z_STREAM_END) {
2378 unlink_or_warn(freq->tmpfile);
2379 return -1;
2380 }
2381 if (hashcmp(freq->sha1, freq->real_sha1)) {
2382 unlink_or_warn(freq->tmpfile);
2383 return -1;
2384 }
2385 freq->rename =
2386 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2387 return freq->rename;
2389}
2390void abort_http_object_request(struct http_object_request *freq)
2392{
2393 unlink_or_warn(freq->tmpfile);
2394 release_http_object_request(freq);
2396}
2397void release_http_object_request(struct http_object_request *freq)
2399{
2400 if (freq->localfile != -1) {
2401 close(freq->localfile);
2402 freq->localfile = -1;
2403 }
2404 if (freq->url != NULL) {
2405 FREE_AND_NULL(freq->url);
2406 }
2407 if (freq->slot != NULL) {
2408 freq->slot->callback_func = NULL;
2409 freq->slot->callback_data = NULL;
2410 release_active_slot(freq->slot);
2411 freq->slot = NULL;
2412 }
2413}