?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove cache.h inclusion due to object-file.h changes
[alt-git.git] / http.c
blobc3916ceb4d8b818e4a48e3137245ea708ccbbde4
1 #include "git-compat-util.h"
2 #include "git-curl-compat.h"
3 #include "hex.h"
4 #include "http.h"
5 #include "config.h"
6 #include "pack.h"
7 #include "sideband.h"
8 #include "run-command.h"
9 #include "url.h"
10 #include "urlmatch.h"
11 #include "credential.h"
12 #include "version.h"
13 #include "pkt-line.h"
14 #include "gettext.h"
15 #include "trace.h"
16 #include "transport.h"
17 #include "packfile.h"
18 #include "protocol.h"
19 #include "string-list.h"
20 #include "object-file.h"
21 #include "object-store.h"
22
23 static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
24 static int trace_curl_data = 1;
25 static int trace_curl_redact = 1;
26 long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
27 int active_requests;
28 int http_is_verbose;
29 ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
30
31 static int min_curl_sessions = 1;
32 static int curl_session_count;
33 static int max_requests = -1;
34 static CURLM *curlm;
35 static CURL *curl_default;
36
37 #define PREV_BUF_SIZE 4096
38
39 char curl_errorstr[CURL_ERROR_SIZE];
40
41 static int curl_ssl_verify = -1;
42 static int curl_ssl_try;
43 static const char *curl_http_version = NULL;
44 static const char *ssl_cert;
45 static const char *ssl_cipherlist;
46 static const char *ssl_version;
47 static struct {
48 const char *name;
49 long ssl_version;
50 } sslversions[] = {
51 { "sslv2", CURL_SSLVERSION_SSLv2 },
52 { "sslv3", CURL_SSLVERSION_SSLv3 },
53 { "tlsv1", CURL_SSLVERSION_TLSv1 },
54 #ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_0
55 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
56 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
57 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
58 #endif
59 #ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_3
60 { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
61 #endif
62 };
63 static const char *ssl_key;
64 static const char *ssl_capath;
65 static const char *curl_no_proxy;
66 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
67 static const char *ssl_pinnedkey;
68 #endif
69 static const char *ssl_cainfo;
70 static long curl_low_speed_limit = -1;
71 static long curl_low_speed_time = -1;
72 static int curl_ftp_no_epsv;
73 static const char *curl_http_proxy;
74 static const char *http_proxy_authmethod;
75
76 static const char *http_proxy_ssl_cert;
77 static const char *http_proxy_ssl_key;
78 static const char *http_proxy_ssl_ca_info;
79 static struct credential proxy_cert_auth = CREDENTIAL_INIT;
80 static int proxy_ssl_cert_password_required;
81
82 static struct {
83 const char *name;
84 long curlauth_param;
85 } proxy_authmethods[] = {
86 { "basic", CURLAUTH_BASIC },
87 { "digest", CURLAUTH_DIGEST },
88 { "negotiate", CURLAUTH_GSSNEGOTIATE },
89 { "ntlm", CURLAUTH_NTLM },
90 { "anyauth", CURLAUTH_ANY },
91 /*
92 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
93 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
94 * here, too
95 */
96 };
97 #ifdef CURLGSSAPI_DELEGATION_FLAG
98 static const char *curl_deleg;
99 static struct {
100 const char *name;
101 long curl_deleg_param;
102 } curl_deleg_levels[] = {
103 { "none", CURLGSSAPI_DELEGATION_NONE },
104 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
105 { "always", CURLGSSAPI_DELEGATION_FLAG },
106 };
107 #endif
108
109 static struct credential proxy_auth = CREDENTIAL_INIT;
110 static const char *curl_proxyuserpwd;
111 static const char *curl_cookie_file;
112 static int curl_save_cookies;
113 struct credential http_auth = CREDENTIAL_INIT;
114 static int http_proactive_auth;
115 static const char *user_agent;
116 static int curl_empty_auth = -1;
117
118 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
119
120 static struct credential cert_auth = CREDENTIAL_INIT;
121 static int ssl_cert_password_required;
122 static unsigned long http_auth_methods = CURLAUTH_ANY;
123 static int http_auth_methods_restricted;
124 /* Modes for which empty_auth cannot actually help us. */
125 static unsigned long empty_auth_useless =
126 CURLAUTH_BASIC
127 | CURLAUTH_DIGEST_IE
128 | CURLAUTH_DIGEST;
129
130 static struct curl_slist *pragma_header;
131 static struct curl_slist *no_pragma_header;
132 static struct string_list extra_http_headers = STRING_LIST_INIT_DUP;
133
134 static struct curl_slist *host_resolutions;
135
136 static struct active_request_slot *active_queue_head;
137
138 static char *cached_accept_language;
139
140 static char *http_ssl_backend;
141
142 static int http_schannel_check_revoke = 1;
143 /*
144 * With the backend being set to `schannel`, setting sslCAinfo would override
145 * the Certificate Store in cURL v7.60.0 and later, which is not what we want
146 * by default.
147 */
148 static int http_schannel_use_ssl_cainfo;
149
150 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
151 {
152 size_t size = eltsize * nmemb;
153 struct buffer *buffer = buffer_;
154
155 if (size > buffer->buf.len - buffer->posn)
156 size = buffer->buf.len - buffer->posn;
157 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
158 buffer->posn += size;
159
160 return size / eltsize;
161 }
162
163 int seek_buffer(void *clientp, curl_off_t offset, int origin)
164 {
165 struct buffer *buffer = clientp;
166
167 if (origin != SEEK_SET)
168 BUG("seek_buffer only handles SEEK_SET");
169 if (offset < 0 || offset >= buffer->buf.len) {
170 error("curl seek would be outside of buffer");
171 return CURL_SEEKFUNC_FAIL;
172 }
173
174 buffer->posn = offset;
175 return CURL_SEEKFUNC_OK;
176 }
177
178 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
179 {
180 size_t size = eltsize * nmemb;
181 struct strbuf *buffer = buffer_;
182
183 strbuf_add(buffer, ptr, size);
184 return nmemb;
185 }
186
187 /*
188 * A folded header continuation line starts with any number of spaces or
189 * horizontal tab characters (SP or HTAB) as per RFC 7230 section 3.2.
190 * It is not a continuation line if the line starts with any other character.
191 */
192 static inline int is_hdr_continuation(const char *ptr, const size_t size)
193 {
194 return size && (*ptr == ' ' || *ptr == '\t');
195 }
196
197 static size_t fwrite_wwwauth(char *ptr, size_t eltsize, size_t nmemb, void *p)
198 {
199 size_t size = eltsize * nmemb;
200 struct strvec *values = &http_auth.wwwauth_headers;
201 struct strbuf buf = STRBUF_INIT;
202 const char *val;
203 size_t val_len;
204
205 /*
206 * Header lines may not come NULL-terminated from libcurl so we must
207 * limit all scans to the maximum length of the header line, or leverage
208 * strbufs for all operations.
209 *
210 * In addition, it is possible that header values can be split over
211 * multiple lines as per RFC 7230. 'Line folding' has been deprecated
212 * but older servers may still emit them. A continuation header field
213 * value is identified as starting with a space or horizontal tab.
214 *
215 * The formal definition of a header field as given in RFC 7230 is:
216 *
217 * header-field = field-name ":" OWS field-value OWS
218 *
219 * field-name = token
220 * field-value = *( field-content / obs-fold )
221 * field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
222 * field-vchar = VCHAR / obs-text
223 *
224 * obs-fold = CRLF 1*( SP / HTAB )
225 * ; obsolete line folding
226 * ; see Section 3.2.4
227 */
228
229 /* Start of a new WWW-Authenticate header */
230 if (skip_iprefix_mem(ptr, size, "www-authenticate:", &val, &val_len)) {
231 strbuf_add(&buf, val, val_len);
232
233 /*
234 * Strip the CRLF that should be present at the end of each
235 * field as well as any trailing or leading whitespace from the
236 * value.
237 */
238 strbuf_trim(&buf);
239
240 strvec_push(values, buf.buf);
241 http_auth.header_is_last_match = 1;
242 goto exit;
243 }
244
245 /*
246 * This line could be a continuation of the previously matched header
247 * field. If this is the case then we should append this value to the
248 * end of the previously consumed value.
249 */
250 if (http_auth.header_is_last_match && is_hdr_continuation(ptr, size)) {
251 /*
252 * Trim the CRLF and any leading or trailing from this line.
253 */
254 strbuf_add(&buf, ptr, size);
255 strbuf_trim(&buf);
256
257 /*
258 * At this point we should always have at least one existing
259 * value, even if it is empty. Do not bother appending the new
260 * value if this continuation header is itself empty.
261 */
262 if (!values->nr) {
263 BUG("should have at least one existing header value");
264 } else if (buf.len) {
265 char *prev = xstrdup(values->v[values->nr - 1]);
266
267 /* Join two non-empty values with a single space. */
268 const char *const sp = *prev ? " " : "";
269
270 strvec_pop(values);
271 strvec_pushf(values, "%s%s%s", prev, sp, buf.buf);
272 free(prev);
273 }
274
275 goto exit;
276 }
277
278 /* Not a continuation of a previously matched auth header line. */
279 http_auth.header_is_last_match = 0;
280
281 /*
282 * If this is a HTTP status line and not a header field, this signals
283 * a different HTTP response. libcurl writes all the output of all
284 * response headers of all responses, including redirects.
285 * We only care about the last HTTP request response's headers so clear
286 * the existing array.
287 */
288 if (skip_iprefix_mem(ptr, size, "http/", &val, &val_len))
289 strvec_clear(values);
290
291 exit:
292 strbuf_release(&buf);
293 return size;
294 }
295
296 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
297 {
298 return nmemb;
299 }
300
301 static void closedown_active_slot(struct active_request_slot *slot)
302 {
303 active_requests--;
304 slot->in_use = 0;
305 }
306
307 static void finish_active_slot(struct active_request_slot *slot)
308 {
309 closedown_active_slot(slot);
310 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
311
312 if (slot->finished)
313 (*slot->finished) = 1;
314
315 /* Store slot results so they can be read after the slot is reused */
316 if (slot->results) {
317 slot->results->curl_result = slot->curl_result;
318 slot->results->http_code = slot->http_code;
319 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
320 &slot->results->auth_avail);
321
322 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
323 &slot->results->http_connectcode);
324 }
325
326 /* Run callback if appropriate */
327 if (slot->callback_func)
328 slot->callback_func(slot->callback_data);
329 }
330
331 static void xmulti_remove_handle(struct active_request_slot *slot)
332 {
333 curl_multi_remove_handle(curlm, slot->curl);
334 }
335
336 static void process_curl_messages(void)
337 {
338 int num_messages;
339 struct active_request_slot *slot;
340 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
341
342 while (curl_message != NULL) {
343 if (curl_message->msg == CURLMSG_DONE) {
344 int curl_result = curl_message->data.result;
345 slot = active_queue_head;
346 while (slot != NULL &&
347 slot->curl != curl_message->easy_handle)
348 slot = slot->next;
349 if (slot) {
350 xmulti_remove_handle(slot);
351 slot->curl_result = curl_result;
352 finish_active_slot(slot);
353 } else {
354 fprintf(stderr, "Received DONE message for unknown request!\n");
355 }
356 } else {
357 fprintf(stderr, "Unknown CURL message received: %d\n",
358 (int)curl_message->msg);
359 }
360 curl_message = curl_multi_info_read(curlm, &num_messages);
361 }
362 }
363
364 static int http_options(const char *var, const char *value, void *cb)
365 {
366 if (!strcmp("http.version", var)) {
367 return git_config_string(&curl_http_version, var, value);
368 }
369 if (!strcmp("http.sslverify", var)) {
370 curl_ssl_verify = git_config_bool(var, value);
371 return 0;
372 }
373 if (!strcmp("http.sslcipherlist", var))
374 return git_config_string(&ssl_cipherlist, var, value);
375 if (!strcmp("http.sslversion", var))
376 return git_config_string(&ssl_version, var, value);
377 if (!strcmp("http.sslcert", var))
378 return git_config_pathname(&ssl_cert, var, value);
379 if (!strcmp("http.sslkey", var))
380 return git_config_pathname(&ssl_key, var, value);
381 if (!strcmp("http.sslcapath", var))
382 return git_config_pathname(&ssl_capath, var, value);
383 if (!strcmp("http.sslcainfo", var))
384 return git_config_pathname(&ssl_cainfo, var, value);
385 if (!strcmp("http.sslcertpasswordprotected", var)) {
386 ssl_cert_password_required = git_config_bool(var, value);
387 return 0;
388 }
389 if (!strcmp("http.ssltry", var)) {
390 curl_ssl_try = git_config_bool(var, value);
391 return 0;
392 }
393 if (!strcmp("http.sslbackend", var)) {
394 free(http_ssl_backend);
395 http_ssl_backend = xstrdup_or_null(value);
396 return 0;
397 }
398
399 if (!strcmp("http.schannelcheckrevoke", var)) {
400 http_schannel_check_revoke = git_config_bool(var, value);
401 return 0;
402 }
403
404 if (!strcmp("http.schannelusesslcainfo", var)) {
405 http_schannel_use_ssl_cainfo = git_config_bool(var, value);
406 return 0;
407 }
408
409 if (!strcmp("http.minsessions", var)) {
410 min_curl_sessions = git_config_int(var, value);
411 if (min_curl_sessions > 1)
412 min_curl_sessions = 1;
413 return 0;
414 }
415 if (!strcmp("http.maxrequests", var)) {
416 max_requests = git_config_int(var, value);
417 return 0;
418 }
419 if (!strcmp("http.lowspeedlimit", var)) {
420 curl_low_speed_limit = (long)git_config_int(var, value);
421 return 0;
422 }
423 if (!strcmp("http.lowspeedtime", var)) {
424 curl_low_speed_time = (long)git_config_int(var, value);
425 return 0;
426 }
427
428 if (!strcmp("http.noepsv", var)) {
429 curl_ftp_no_epsv = git_config_bool(var, value);
430 return 0;
431 }
432 if (!strcmp("http.proxy", var))
433 return git_config_string(&curl_http_proxy, var, value);
434
435 if (!strcmp("http.proxyauthmethod", var))
436 return git_config_string(&http_proxy_authmethod, var, value);
437
438 if (!strcmp("http.proxysslcert", var))
439 return git_config_string(&http_proxy_ssl_cert, var, value);
440
441 if (!strcmp("http.proxysslkey", var))
442 return git_config_string(&http_proxy_ssl_key, var, value);
443
444 if (!strcmp("http.proxysslcainfo", var))
445 return git_config_string(&http_proxy_ssl_ca_info, var, value);
446
447 if (!strcmp("http.proxysslcertpasswordprotected", var)) {
448 proxy_ssl_cert_password_required = git_config_bool(var, value);
449 return 0;
450 }
451
452 if (!strcmp("http.cookiefile", var))
453 return git_config_pathname(&curl_cookie_file, var, value);
454 if (!strcmp("http.savecookies", var)) {
455 curl_save_cookies = git_config_bool(var, value);
456 return 0;
457 }
458
459 if (!strcmp("http.postbuffer", var)) {
460 http_post_buffer = git_config_ssize_t(var, value);
461 if (http_post_buffer < 0)
462 warning(_("negative value for http.postBuffer; defaulting to %d"), LARGE_PACKET_MAX);
463 if (http_post_buffer < LARGE_PACKET_MAX)
464 http_post_buffer = LARGE_PACKET_MAX;
465 return 0;
466 }
467
468 if (!strcmp("http.useragent", var))
469 return git_config_string(&user_agent, var, value);
470
471 if (!strcmp("http.emptyauth", var)) {
472 if (value && !strcmp("auto", value))
473 curl_empty_auth = -1;
474 else
475 curl_empty_auth = git_config_bool(var, value);
476 return 0;
477 }
478
479 if (!strcmp("http.delegation", var)) {
480 #ifdef CURLGSSAPI_DELEGATION_FLAG
481 return git_config_string(&curl_deleg, var, value);
482 #else
483 warning(_("Delegation control is not supported with cURL < 7.22.0"));
484 return 0;
485 #endif
486 }
487
488 if (!strcmp("http.pinnedpubkey", var)) {
489 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
490 return git_config_pathname(&ssl_pinnedkey, var, value);
491 #else
492 warning(_("Public key pinning not supported with cURL < 7.39.0"));
493 return 0;
494 #endif
495 }
496
497 if (!strcmp("http.extraheader", var)) {
498 if (!value) {
499 return config_error_nonbool(var);
500 } else if (!*value) {
501 string_list_clear(&extra_http_headers, 0);
502 } else {
503 string_list_append(&extra_http_headers, value);
504 }
505 return 0;
506 }
507
508 if (!strcmp("http.curloptresolve", var)) {
509 if (!value) {
510 return config_error_nonbool(var);
511 } else if (!*value) {
512 curl_slist_free_all(host_resolutions);
513 host_resolutions = NULL;
514 } else {
515 host_resolutions = curl_slist_append(host_resolutions, value);
516 }
517 return 0;
518 }
519
520 if (!strcmp("http.followredirects", var)) {
521 if (value && !strcmp(value, "initial"))
522 http_follow_config = HTTP_FOLLOW_INITIAL;
523 else if (git_config_bool(var, value))
524 http_follow_config = HTTP_FOLLOW_ALWAYS;
525 else
526 http_follow_config = HTTP_FOLLOW_NONE;
527 return 0;
528 }
529
530 /* Fall back on the default ones */
531 return git_default_config(var, value, cb);
532 }
533
534 static int curl_empty_auth_enabled(void)
535 {
536 if (curl_empty_auth >= 0)
537 return curl_empty_auth;
538
539 /*
540 * In the automatic case, kick in the empty-auth
541 * hack as long as we would potentially try some
542 * method more exotic than "Basic" or "Digest".
543 *
544 * But only do this when this is our second or
545 * subsequent request, as by then we know what
546 * methods are available.
547 */
548 if (http_auth_methods_restricted &&
549 (http_auth_methods & ~empty_auth_useless))
550 return 1;
551 return 0;
552 }
553
554 static void init_curl_http_auth(CURL *result)
555 {
556 if (!http_auth.username || !*http_auth.username) {
557 if (curl_empty_auth_enabled())
558 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
559 return;
560 }
561
562 credential_fill(&http_auth);
563
564 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
565 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
566 }
567
568 /* *var must be free-able */
569 static void var_override(const char **var, char *value)
570 {
571 if (value) {
572 free((void *)*var);
573 *var = xstrdup(value);
574 }
575 }
576
577 static void set_proxyauth_name_password(CURL *result)
578 {
579 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
580 proxy_auth.username);
581 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
582 proxy_auth.password);
583 }
584
585 static void init_curl_proxy_auth(CURL *result)
586 {
587 if (proxy_auth.username) {
588 if (!proxy_auth.password)
589 credential_fill(&proxy_auth);
590 set_proxyauth_name_password(result);
591 }
592
593 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
594
595 if (http_proxy_authmethod) {
596 int i;
597 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
598 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
599 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
600 proxy_authmethods[i].curlauth_param);
601 break;
602 }
603 }
604 if (i == ARRAY_SIZE(proxy_authmethods)) {
605 warning("unsupported proxy authentication method %s: using anyauth",
606 http_proxy_authmethod);
607 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
608 }
609 }
610 else
611 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
612 }
613
614 static int has_cert_password(void)
615 {
616 if (ssl_cert == NULL || ssl_cert_password_required != 1)
617 return 0;
618 if (!cert_auth.password) {
619 cert_auth.protocol = xstrdup("cert");
620 cert_auth.host = xstrdup("");
621 cert_auth.username = xstrdup("");
622 cert_auth.path = xstrdup(ssl_cert);
623 credential_fill(&cert_auth);
624 }
625 return 1;
626 }
627
628 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
629 static int has_proxy_cert_password(void)
630 {
631 if (http_proxy_ssl_cert == NULL || proxy_ssl_cert_password_required != 1)
632 return 0;
633 if (!proxy_cert_auth.password) {
634 proxy_cert_auth.protocol = xstrdup("cert");
635 proxy_cert_auth.host = xstrdup("");
636 proxy_cert_auth.username = xstrdup("");
637 proxy_cert_auth.path = xstrdup(http_proxy_ssl_cert);
638 credential_fill(&proxy_cert_auth);
639 }
640 return 1;
641 }
642 #endif
643
644 #ifdef GITCURL_HAVE_CURLOPT_TCP_KEEPALIVE
645 static void set_curl_keepalive(CURL *c)
646 {
647 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
648 }
649
650 #else
651 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
652 {
653 int ka = 1;
654 int rc;
655 socklen_t len = (socklen_t)sizeof(ka);
656
657 if (type != CURLSOCKTYPE_IPCXN)
658 return 0;
659
660 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
661 if (rc < 0)
662 warning_errno("unable to set SO_KEEPALIVE on socket");
663
664 return CURL_SOCKOPT_OK;
665 }
666
667 static void set_curl_keepalive(CURL *c)
668 {
669 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
670 }
671 #endif
672
673 /* Return 1 if redactions have been made, 0 otherwise. */
674 static int redact_sensitive_header(struct strbuf *header, size_t offset)
675 {
676 int ret = 0;
677 const char *sensitive_header;
678
679 if (trace_curl_redact &&
680 (skip_iprefix(header->buf + offset, "Authorization:", &sensitive_header) ||
681 skip_iprefix(header->buf + offset, "Proxy-Authorization:", &sensitive_header))) {
682 /* The first token is the type, which is OK to log */
683 while (isspace(*sensitive_header))
684 sensitive_header++;
685 while (*sensitive_header && !isspace(*sensitive_header))
686 sensitive_header++;
687 /* Everything else is opaque and possibly sensitive */
688 strbuf_setlen(header, sensitive_header - header->buf);
689 strbuf_addstr(header, " <redacted>");
690 ret = 1;
691 } else if (trace_curl_redact &&
692 skip_iprefix(header->buf + offset, "Cookie:", &sensitive_header)) {
693 struct strbuf redacted_header = STRBUF_INIT;
694 const char *cookie;
695
696 while (isspace(*sensitive_header))
697 sensitive_header++;
698
699 cookie = sensitive_header;
700
701 while (cookie) {
702 char *equals;
703 char *semicolon = strstr(cookie, "; ");
704 if (semicolon)
705 *semicolon = 0;
706 equals = strchrnul(cookie, '=');
707 if (!equals) {
708 /* invalid cookie, just append and continue */
709 strbuf_addstr(&redacted_header, cookie);
710 continue;
711 }
712 strbuf_add(&redacted_header, cookie, equals - cookie);
713 strbuf_addstr(&redacted_header, "=<redacted>");
714 if (semicolon) {
715 /*
716 * There are more cookies. (Or, for some
717 * reason, the input string ends in "; ".)
718 */
719 strbuf_addstr(&redacted_header, "; ");
720 cookie = semicolon + strlen("; ");
721 } else {
722 cookie = NULL;
723 }
724 }
725
726 strbuf_setlen(header, sensitive_header - header->buf);
727 strbuf_addbuf(header, &redacted_header);
728 ret = 1;
729 }
730 return ret;
731 }
732
733 /* Redact headers in info */
734 static void redact_sensitive_info_header(struct strbuf *header)
735 {
736 const char *sensitive_header;
737
738 /*
739 * curl's h2h3 prints headers in info, e.g.:
740 * h2h3 [<header-name>: <header-val>]
741 */
742 if (trace_curl_redact &&
743 skip_iprefix(header->buf, "h2h3 [", &sensitive_header)) {
744 if (redact_sensitive_header(header, sensitive_header - header->buf)) {
745 /* redaction ate our closing bracket */
746 strbuf_addch(header, ']');
747 }
748 }
749 }
750
751 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
752 {
753 struct strbuf out = STRBUF_INIT;
754 struct strbuf **headers, **header;
755
756 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
757 text, (long)size, (long)size);
758 trace_strbuf(&trace_curl, &out);
759 strbuf_reset(&out);
760 strbuf_add(&out, ptr, size);
761 headers = strbuf_split_max(&out, '\n', 0);
762
763 for (header = headers; *header; header++) {
764 if (hide_sensitive_header)
765 redact_sensitive_header(*header, 0);
766 strbuf_insertstr((*header), 0, text);
767 strbuf_insertstr((*header), strlen(text), ": ");
768 strbuf_rtrim((*header));
769 strbuf_addch((*header), '\n');
770 trace_strbuf(&trace_curl, (*header));
771 }
772 strbuf_list_free(headers);
773 strbuf_release(&out);
774 }
775
776 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
777 {
778 size_t i;
779 struct strbuf out = STRBUF_INIT;
780 unsigned int width = 60;
781
782 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
783 text, (long)size, (long)size);
784 trace_strbuf(&trace_curl, &out);
785
786 for (i = 0; i < size; i += width) {
787 size_t w;
788
789 strbuf_reset(&out);
790 strbuf_addf(&out, "%s: ", text);
791 for (w = 0; (w < width) && (i + w < size); w++) {
792 unsigned char ch = ptr[i + w];
793
794 strbuf_addch(&out,
795 (ch >= 0x20) && (ch < 0x80)
796 ? ch : '.');
797 }
798 strbuf_addch(&out, '\n');
799 trace_strbuf(&trace_curl, &out);
800 }
801 strbuf_release(&out);
802 }
803
804 static void curl_dump_info(char *data, size_t size)
805 {
806 struct strbuf buf = STRBUF_INIT;
807
808 strbuf_add(&buf, data, size);
809
810 redact_sensitive_info_header(&buf);
811 trace_printf_key(&trace_curl, "== Info: %s", buf.buf);
812
813 strbuf_release(&buf);
814 }
815
816 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
817 {
818 const char *text;
819 enum { NO_FILTER = 0, DO_FILTER = 1 };
820
821 switch (type) {
822 case CURLINFO_TEXT:
823 curl_dump_info(data, size);
824 break;
825 case CURLINFO_HEADER_OUT:
826 text = "=> Send header";
827 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
828 break;
829 case CURLINFO_DATA_OUT:
830 if (trace_curl_data) {
831 text = "=> Send data";
832 curl_dump_data(text, (unsigned char *)data, size);
833 }
834 break;
835 case CURLINFO_SSL_DATA_OUT:
836 if (trace_curl_data) {
837 text = "=> Send SSL data";
838 curl_dump_data(text, (unsigned char *)data, size);
839 }
840 break;
841 case CURLINFO_HEADER_IN:
842 text = "<= Recv header";
843 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
844 break;
845 case CURLINFO_DATA_IN:
846 if (trace_curl_data) {
847 text = "<= Recv data";
848 curl_dump_data(text, (unsigned char *)data, size);
849 }
850 break;
851 case CURLINFO_SSL_DATA_IN:
852 if (trace_curl_data) {
853 text = "<= Recv SSL data";
854 curl_dump_data(text, (unsigned char *)data, size);
855 }
856 break;
857
858 default: /* we ignore unknown types by default */
859 return 0;
860 }
861 return 0;
862 }
863
864 void http_trace_curl_no_data(void)
865 {
866 trace_override_envvar(&trace_curl, "1");
867 trace_curl_data = 0;
868 }
869
870 void setup_curl_trace(CURL *handle)
871 {
872 if (!trace_want(&trace_curl))
873 return;
874 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
875 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
876 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
877 }
878
879 static void proto_list_append(struct strbuf *list, const char *proto)
880 {
881 if (!list)
882 return;
883 if (list->len)
884 strbuf_addch(list, ',');
885 strbuf_addstr(list, proto);
886 }
887
888 static long get_curl_allowed_protocols(int from_user, struct strbuf *list)
889 {
890 long bits = 0;
891
892 if (is_transport_allowed("http", from_user)) {
893 bits |= CURLPROTO_HTTP;
894 proto_list_append(list, "http");
895 }
896 if (is_transport_allowed("https", from_user)) {
897 bits |= CURLPROTO_HTTPS;
898 proto_list_append(list, "https");
899 }
900 if (is_transport_allowed("ftp", from_user)) {
901 bits |= CURLPROTO_FTP;
902 proto_list_append(list, "ftp");
903 }
904 if (is_transport_allowed("ftps", from_user)) {
905 bits |= CURLPROTO_FTPS;
906 proto_list_append(list, "ftps");
907 }
908
909 return bits;
910 }
911
912 #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
913 static int get_curl_http_version_opt(const char *version_string, long *opt)
914 {
915 int i;
916 static struct {
917 const char *name;
918 long opt_token;
919 } choice[] = {
920 { "HTTP/1.1", CURL_HTTP_VERSION_1_1 },
921 { "HTTP/2", CURL_HTTP_VERSION_2 }
922 };
923
924 for (i = 0; i < ARRAY_SIZE(choice); i++) {
925 if (!strcmp(version_string, choice[i].name)) {
926 *opt = choice[i].opt_token;
927 return 0;
928 }
929 }
930
931 warning("unknown value given to http.version: '%s'", version_string);
932 return -1; /* not found */
933 }
934
935 #endif
936
937 static CURL *get_curl_handle(void)
938 {
939 CURL *result = curl_easy_init();
940
941 if (!result)
942 die("curl_easy_init failed");
943
944 if (!curl_ssl_verify) {
945 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
946 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
947 } else {
948 /* Verify authenticity of the peer's certificate */
949 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
950 /* The name in the cert must match whom we tried to connect */
951 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
952 }
953
954 #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
955 if (curl_http_version) {
956 long opt;
957 if (!get_curl_http_version_opt(curl_http_version, &opt)) {
958 /* Set request use http version */
959 curl_easy_setopt(result, CURLOPT_HTTP_VERSION, opt);
960 }
961 }
962 #endif
963
964 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
965 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
966
967 #ifdef CURLGSSAPI_DELEGATION_FLAG
968 if (curl_deleg) {
969 int i;
970 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
971 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
972 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
973 curl_deleg_levels[i].curl_deleg_param);
974 break;
975 }
976 }
977 if (i == ARRAY_SIZE(curl_deleg_levels))
978 warning("Unknown delegation method '%s': using default",
979 curl_deleg);
980 }
981 #endif
982
983 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
984 !http_schannel_check_revoke) {
985 #ifdef GIT_CURL_HAVE_CURLSSLOPT_NO_REVOKE
986 curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
987 #else
988 warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0"));
989 #endif
990 }
991
992 if (http_proactive_auth)
993 init_curl_http_auth(result);
994
995 if (getenv("GIT_SSL_VERSION"))
996 ssl_version = getenv("GIT_SSL_VERSION");
997 if (ssl_version && *ssl_version) {
998 int i;
999 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
1000 if (!strcmp(ssl_version, sslversions[i].name)) {
1001 curl_easy_setopt(result, CURLOPT_SSLVERSION,
1002 sslversions[i].ssl_version);
1003 break;
1004 }
1005 }
1006 if (i == ARRAY_SIZE(sslversions))
1007 warning("unsupported ssl version %s: using default",
1008 ssl_version);
1009 }
1010
1011 if (getenv("GIT_SSL_CIPHER_LIST"))
1012 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
1013 if (ssl_cipherlist != NULL && *ssl_cipherlist)
1014 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
1015 ssl_cipherlist);
1016
1017 if (ssl_cert)
1018 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
1019 if (has_cert_password())
1020 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
1021 if (ssl_key)
1022 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
1023 if (ssl_capath)
1024 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
1025 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
1026 if (ssl_pinnedkey)
1027 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
1028 #endif
1029 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
1030 !http_schannel_use_ssl_cainfo) {
1031 curl_easy_setopt(result, CURLOPT_CAINFO, NULL);
1032 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
1033 curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL);
1034 #endif
1035 } else if (ssl_cainfo != NULL || http_proxy_ssl_ca_info != NULL) {
1036 if (ssl_cainfo)
1037 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
1038 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
1039 if (http_proxy_ssl_ca_info)
1040 curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, http_proxy_ssl_ca_info);
1041 #endif
1042 }
1043
1044 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
1045 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
1046 curl_low_speed_limit);
1047 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
1048 curl_low_speed_time);
1049 }
1050
1051 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
1052 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
1053
1054 #ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
1055 {
1056 struct strbuf buf = STRBUF_INIT;
1057
1058 get_curl_allowed_protocols(0, &buf);
1059 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS_STR, buf.buf);
1060 strbuf_reset(&buf);
1061
1062 get_curl_allowed_protocols(-1, &buf);
1063 curl_easy_setopt(result, CURLOPT_PROTOCOLS_STR, buf.buf);
1064 strbuf_release(&buf);
1065 }
1066 #else
1067 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
1068 get_curl_allowed_protocols(0, NULL));
1069 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
1070 get_curl_allowed_protocols(-1, NULL));
1071 #endif
1072
1073 if (getenv("GIT_CURL_VERBOSE"))
1074 http_trace_curl_no_data();
1075 setup_curl_trace(result);
1076 if (getenv("GIT_TRACE_CURL_NO_DATA"))
1077 trace_curl_data = 0;
1078 if (!git_env_bool("GIT_TRACE_REDACT", 1))
1079 trace_curl_redact = 0;
1080
1081 curl_easy_setopt(result, CURLOPT_USERAGENT,
1082 user_agent ? user_agent : git_user_agent());
1083
1084 if (curl_ftp_no_epsv)
1085 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
1086
1087 if (curl_ssl_try)
1088 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
1089
1090 /*
1091 * CURL also examines these variables as a fallback; but we need to query
1092 * them here in order to decide whether to prompt for missing password (cf.
1093 * init_curl_proxy_auth()).
1094 *
1095 * Unlike many other common environment variables, these are historically
1096 * lowercase only. It appears that CURL did not know this and implemented
1097 * only uppercase variants, which was later corrected to take both - with
1098 * the exception of http_proxy, which is lowercase only also in CURL. As
1099 * the lowercase versions are the historical quasi-standard, they take
1100 * precedence here, as in CURL.
1101 */
1102 if (!curl_http_proxy) {
1103 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
1104 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
1105 var_override(&curl_http_proxy, getenv("https_proxy"));
1106 } else {
1107 var_override(&curl_http_proxy, getenv("http_proxy"));
1108 }
1109 if (!curl_http_proxy) {
1110 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
1111 var_override(&curl_http_proxy, getenv("all_proxy"));
1112 }
1113 }
1114
1115 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
1116 /*
1117 * Handle case with the empty http.proxy value here to keep
1118 * common code clean.
1119 * NB: empty option disables proxying at all.
1120 */
1121 curl_easy_setopt(result, CURLOPT_PROXY, "");
1122 } else if (curl_http_proxy) {
1123 if (starts_with(curl_http_proxy, "socks5h"))
1124 curl_easy_setopt(result,
1125 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
1126 else if (starts_with(curl_http_proxy, "socks5"))
1127 curl_easy_setopt(result,
1128 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
1129 else if (starts_with(curl_http_proxy, "socks4a"))
1130 curl_easy_setopt(result,
1131 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
1132 else if (starts_with(curl_http_proxy, "socks"))
1133 curl_easy_setopt(result,
1134 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
1135 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
1136 else if (starts_with(curl_http_proxy, "https")) {
1137 curl_easy_setopt(result, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
1138
1139 if (http_proxy_ssl_cert)
1140 curl_easy_setopt(result, CURLOPT_PROXY_SSLCERT, http_proxy_ssl_cert);
1141
1142 if (http_proxy_ssl_key)
1143 curl_easy_setopt(result, CURLOPT_PROXY_SSLKEY, http_proxy_ssl_key);
1144
1145 if (has_proxy_cert_password())
1146 curl_easy_setopt(result, CURLOPT_PROXY_KEYPASSWD, proxy_cert_auth.password);
1147 }
1148 #endif
1149 if (strstr(curl_http_proxy, "://"))
1150 credential_from_url(&proxy_auth, curl_http_proxy);
1151 else {
1152 struct strbuf url = STRBUF_INIT;
1153 strbuf_addf(&url, "http://%s", curl_http_proxy);
1154 credential_from_url(&proxy_auth, url.buf);
1155 strbuf_release(&url);
1156 }
1157
1158 if (!proxy_auth.host)
1159 die("Invalid proxy URL '%s'", curl_http_proxy);
1160
1161 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
1162 var_override(&curl_no_proxy, getenv("NO_PROXY"));
1163 var_override(&curl_no_proxy, getenv("no_proxy"));
1164 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
1165 }
1166 init_curl_proxy_auth(result);
1167
1168 set_curl_keepalive(result);
1169
1170 return result;
1171 }
1172
1173 static void set_from_env(const char **var, const char *envname)
1174 {
1175 const char *val = getenv(envname);
1176 if (val)
1177 *var = val;
1178 }
1179
1180 void http_init(struct remote *remote, const char *url, int proactive_auth)
1181 {
1182 char *low_speed_limit;
1183 char *low_speed_time;
1184 char *normalized_url;
1185 struct urlmatch_config config = URLMATCH_CONFIG_INIT;
1186
1187 config.section = "http";
1188 config.key = NULL;
1189 config.collect_fn = http_options;
1190 config.cascade_fn = git_default_config;
1191 config.cb = NULL;
1192
1193 http_is_verbose = 0;
1194 normalized_url = url_normalize(url, &config.url);
1195
1196 git_config(urlmatch_config_entry, &config);
1197 free(normalized_url);
1198 string_list_clear(&config.vars, 1);
1199
1200 #ifdef GIT_CURL_HAVE_CURLSSLSET_NO_BACKENDS
1201 if (http_ssl_backend) {
1202 const curl_ssl_backend **backends;
1203 struct strbuf buf = STRBUF_INIT;
1204 int i;
1205
1206 switch (curl_global_sslset(-1, http_ssl_backend, &backends)) {
1207 case CURLSSLSET_UNKNOWN_BACKEND:
1208 strbuf_addf(&buf, _("Unsupported SSL backend '%s'. "
1209 "Supported SSL backends:"),
1210 http_ssl_backend);
1211 for (i = 0; backends[i]; i++)
1212 strbuf_addf(&buf, "\n\t%s", backends[i]->name);
1213 die("%s", buf.buf);
1214 case CURLSSLSET_NO_BACKENDS:
1215 die(_("Could not set SSL backend to '%s': "
1216 "cURL was built without SSL backends"),
1217 http_ssl_backend);
1218 case CURLSSLSET_TOO_LATE:
1219 die(_("Could not set SSL backend to '%s': already set"),
1220 http_ssl_backend);
1221 case CURLSSLSET_OK:
1222 break; /* Okay! */
1223 }
1224 }
1225 #endif
1226
1227 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1228 die("curl_global_init failed");
1229
1230 http_proactive_auth = proactive_auth;
1231
1232 if (remote && remote->http_proxy)
1233 curl_http_proxy = xstrdup(remote->http_proxy);
1234
1235 if (remote)
1236 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1237
1238 pragma_header = curl_slist_append(http_copy_default_headers(),
1239 "Pragma: no-cache");
1240 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1241 "Pragma:");
1242
1243 {
1244 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1245 if (http_max_requests)
1246 max_requests = atoi(http_max_requests);
1247 }
1248
1249 curlm = curl_multi_init();
1250 if (!curlm)
1251 die("curl_multi_init failed");
1252
1253 if (getenv("GIT_SSL_NO_VERIFY"))
1254 curl_ssl_verify = 0;
1255
1256 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1257 set_from_env(&ssl_key, "GIT_SSL_KEY");
1258 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1259 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1260
1261 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1262
1263 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1264 if (low_speed_limit)
1265 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1266 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1267 if (low_speed_time)
1268 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1269
1270 if (curl_ssl_verify == -1)
1271 curl_ssl_verify = 1;
1272
1273 curl_session_count = 0;
1274 if (max_requests < 1)
1275 max_requests = DEFAULT_MAX_REQUESTS;
1276
1277 set_from_env(&http_proxy_ssl_cert, "GIT_PROXY_SSL_CERT");
1278 set_from_env(&http_proxy_ssl_key, "GIT_PROXY_SSL_KEY");
1279 set_from_env(&http_proxy_ssl_ca_info, "GIT_PROXY_SSL_CAINFO");
1280
1281 if (getenv("GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED"))
1282 proxy_ssl_cert_password_required = 1;
1283
1284 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1285 curl_ftp_no_epsv = 1;
1286
1287 if (url) {
1288 credential_from_url(&http_auth, url);
1289 if (!ssl_cert_password_required &&
1290 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1291 starts_with(url, "https://"))
1292 ssl_cert_password_required = 1;
1293 }
1294
1295 curl_default = get_curl_handle();
1296 }
1297
1298 void http_cleanup(void)
1299 {
1300 struct active_request_slot *slot = active_queue_head;
1301
1302 while (slot != NULL) {
1303 struct active_request_slot *next = slot->next;
1304 if (slot->curl) {
1305 xmulti_remove_handle(slot);
1306 curl_easy_cleanup(slot->curl);
1307 }
1308 free(slot);
1309 slot = next;
1310 }
1311 active_queue_head = NULL;
1312
1313 curl_easy_cleanup(curl_default);
1314
1315 curl_multi_cleanup(curlm);
1316 curl_global_cleanup();
1317
1318 string_list_clear(&extra_http_headers, 0);
1319
1320 curl_slist_free_all(pragma_header);
1321 pragma_header = NULL;
1322
1323 curl_slist_free_all(no_pragma_header);
1324 no_pragma_header = NULL;
1325
1326 curl_slist_free_all(host_resolutions);
1327 host_resolutions = NULL;
1328
1329 if (curl_http_proxy) {
1330 free((void *)curl_http_proxy);
1331 curl_http_proxy = NULL;
1332 }
1333
1334 if (proxy_auth.password) {
1335 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1336 FREE_AND_NULL(proxy_auth.password);
1337 }
1338
1339 free((void *)curl_proxyuserpwd);
1340 curl_proxyuserpwd = NULL;
1341
1342 free((void *)http_proxy_authmethod);
1343 http_proxy_authmethod = NULL;
1344
1345 if (cert_auth.password) {
1346 memset(cert_auth.password, 0, strlen(cert_auth.password));
1347 FREE_AND_NULL(cert_auth.password);
1348 }
1349 ssl_cert_password_required = 0;
1350
1351 if (proxy_cert_auth.password) {
1352 memset(proxy_cert_auth.password, 0, strlen(proxy_cert_auth.password));
1353 FREE_AND_NULL(proxy_cert_auth.password);
1354 }
1355 proxy_ssl_cert_password_required = 0;
1356
1357 FREE_AND_NULL(cached_accept_language);
1358 }
1359
1360 struct active_request_slot *get_active_slot(void)
1361 {
1362 struct active_request_slot *slot = active_queue_head;
1363 struct active_request_slot *newslot;
1364
1365 int num_transfers;
1366
1367 /* Wait for a slot to open up if the queue is full */
1368 while (active_requests >= max_requests) {
1369 curl_multi_perform(curlm, &num_transfers);
1370 if (num_transfers < active_requests)
1371 process_curl_messages();
1372 }
1373
1374 while (slot != NULL && slot->in_use)
1375 slot = slot->next;
1376
1377 if (!slot) {
1378 newslot = xmalloc(sizeof(*newslot));
1379 newslot->curl = NULL;
1380 newslot->in_use = 0;
1381 newslot->next = NULL;
1382
1383 slot = active_queue_head;
1384 if (!slot) {
1385 active_queue_head = newslot;
1386 } else {
1387 while (slot->next != NULL)
1388 slot = slot->next;
1389 slot->next = newslot;
1390 }
1391 slot = newslot;
1392 }
1393
1394 if (!slot->curl) {
1395 slot->curl = curl_easy_duphandle(curl_default);
1396 curl_session_count++;
1397 }
1398
1399 active_requests++;
1400 slot->in_use = 1;
1401 slot->results = NULL;
1402 slot->finished = NULL;
1403 slot->callback_data = NULL;
1404 slot->callback_func = NULL;
1405 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1406 if (curl_save_cookies)
1407 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1408 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1409 curl_easy_setopt(slot->curl, CURLOPT_RESOLVE, host_resolutions);
1410 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1411 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1412 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1413 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1414 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1415 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1416 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1417 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1418 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1419
1420 /*
1421 * Default following to off unless "ALWAYS" is configured; this gives
1422 * callers a sane starting point, and they can tweak for individual
1423 * HTTP_FOLLOW_* cases themselves.
1424 */
1425 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1426 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1427 else
1428 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1429
1430 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1431 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1432 if (http_auth.password || curl_empty_auth_enabled())
1433 init_curl_http_auth(slot->curl);
1434
1435 return slot;
1436 }
1437
1438 int start_active_slot(struct active_request_slot *slot)
1439 {
1440 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1441 int num_transfers;
1442
1443 if (curlm_result != CURLM_OK &&
1444 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1445 warning("curl_multi_add_handle failed: %s",
1446 curl_multi_strerror(curlm_result));
1447 active_requests--;
1448 slot->in_use = 0;
1449 return 0;
1450 }
1451
1452 /*
1453 * We know there must be something to do, since we just added
1454 * something.
1455 */
1456 curl_multi_perform(curlm, &num_transfers);
1457 return 1;
1458 }
1459
1460 struct fill_chain {
1461 void *data;
1462 int (*fill)(void *);
1463 struct fill_chain *next;
1464 };
1465
1466 static struct fill_chain *fill_cfg;
1467
1468 void add_fill_function(void *data, int (*fill)(void *))
1469 {
1470 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1471 struct fill_chain **linkp = &fill_cfg;
1472 new_fill->data = data;
1473 new_fill->fill = fill;
1474 new_fill->next = NULL;
1475 while (*linkp)
1476 linkp = &(*linkp)->next;
1477 *linkp = new_fill;
1478 }
1479
1480 void fill_active_slots(void)
1481 {
1482 struct active_request_slot *slot = active_queue_head;
1483
1484 while (active_requests < max_requests) {
1485 struct fill_chain *fill;
1486 for (fill = fill_cfg; fill; fill = fill->next)
1487 if (fill->fill(fill->data))
1488 break;
1489
1490 if (!fill)
1491 break;
1492 }
1493
1494 while (slot != NULL) {
1495 if (!slot->in_use && slot->curl != NULL
1496 && curl_session_count > min_curl_sessions) {
1497 curl_easy_cleanup(slot->curl);
1498 slot->curl = NULL;
1499 curl_session_count--;
1500 }
1501 slot = slot->next;
1502 }
1503 }
1504
1505 void step_active_slots(void)
1506 {
1507 int num_transfers;
1508 CURLMcode curlm_result;
1509
1510 do {
1511 curlm_result = curl_multi_perform(curlm, &num_transfers);
1512 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1513 if (num_transfers < active_requests) {
1514 process_curl_messages();
1515 fill_active_slots();
1516 }
1517 }
1518
1519 void run_active_slot(struct active_request_slot *slot)
1520 {
1521 fd_set readfds;
1522 fd_set writefds;
1523 fd_set excfds;
1524 int max_fd;
1525 struct timeval select_timeout;
1526 int finished = 0;
1527
1528 slot->finished = &finished;
1529 while (!finished) {
1530 step_active_slots();
1531
1532 if (slot->in_use) {
1533 long curl_timeout;
1534 curl_multi_timeout(curlm, &curl_timeout);
1535 if (curl_timeout == 0) {
1536 continue;
1537 } else if (curl_timeout == -1) {
1538 select_timeout.tv_sec = 0;
1539 select_timeout.tv_usec = 50000;
1540 } else {
1541 select_timeout.tv_sec = curl_timeout / 1000;
1542 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1543 }
1544
1545 max_fd = -1;
1546 FD_ZERO(&readfds);
1547 FD_ZERO(&writefds);
1548 FD_ZERO(&excfds);
1549 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1550
1551 /*
1552 * It can happen that curl_multi_timeout returns a pathologically
1553 * long timeout when curl_multi_fdset returns no file descriptors
1554 * to read. See commit message for more details.
1555 */
1556 if (max_fd < 0 &&
1557 (select_timeout.tv_sec > 0 ||
1558 select_timeout.tv_usec > 50000)) {
1559 select_timeout.tv_sec = 0;
1560 select_timeout.tv_usec = 50000;
1561 }
1562
1563 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1564 }
1565 }
1566
1567 /*
1568 * The value of slot->finished we set before the loop was used
1569 * to set our "finished" variable when our request completed.
1570 *
1571 * 1. The slot may not have been reused for another requst
1572 * yet, in which case it still has &finished.
1573 *
1574 * 2. The slot may already be in-use to serve another request,
1575 * which can further be divided into two cases:
1576 *
1577 * (a) If call run_active_slot() hasn't been called for that
1578 * other request, slot->finished would have been cleared
1579 * by get_active_slot() and has NULL.
1580 *
1581 * (b) If the request did call run_active_slot(), then the
1582 * call would have updated slot->finished at the beginning
1583 * of this function, and with the clearing of the member
1584 * below, we would find that slot->finished is now NULL.
1585 *
1586 * In all cases, slot->finished has no useful information to
1587 * anybody at this point. Some compilers warn us for
1588 * attempting to smuggle a pointer that is about to become
1589 * invalid, i.e. &finished. We clear it here to assure them.
1590 */
1591 slot->finished = NULL;
1592 }
1593
1594 static void release_active_slot(struct active_request_slot *slot)
1595 {
1596 closedown_active_slot(slot);
1597 if (slot->curl) {
1598 xmulti_remove_handle(slot);
1599 if (curl_session_count > min_curl_sessions) {
1600 curl_easy_cleanup(slot->curl);
1601 slot->curl = NULL;
1602 curl_session_count--;
1603 }
1604 }
1605 fill_active_slots();
1606 }
1607
1608 void finish_all_active_slots(void)
1609 {
1610 struct active_request_slot *slot = active_queue_head;
1611
1612 while (slot != NULL)
1613 if (slot->in_use) {
1614 run_active_slot(slot);
1615 slot = active_queue_head;
1616 } else {
1617 slot = slot->next;
1618 }
1619 }
1620
1621 /* Helpers for modifying and creating URLs */
1622 static inline int needs_quote(int ch)
1623 {
1624 if (((ch >= 'A') && (ch <= 'Z'))
1625 || ((ch >= 'a') && (ch <= 'z'))
1626 || ((ch >= '0') && (ch <= '9'))
1627 || (ch == '/')
1628 || (ch == '-')
1629 || (ch == '.'))
1630 return 0;
1631 return 1;
1632 }
1633
1634 static char *quote_ref_url(const char *base, const char *ref)
1635 {
1636 struct strbuf buf = STRBUF_INIT;
1637 const char *cp;
1638 int ch;
1639
1640 end_url_with_slash(&buf, base);
1641
1642 for (cp = ref; (ch = *cp) != 0; cp++)
1643 if (needs_quote(ch))
1644 strbuf_addf(&buf, "%%%02x", ch);
1645 else
1646 strbuf_addch(&buf, *cp);
1647
1648 return strbuf_detach(&buf, NULL);
1649 }
1650
1651 void append_remote_object_url(struct strbuf *buf, const char *url,
1652 const char *hex,
1653 int only_two_digit_prefix)
1654 {
1655 end_url_with_slash(buf, url);
1656
1657 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1658 if (!only_two_digit_prefix)
1659 strbuf_addstr(buf, hex + 2);
1660 }
1661
1662 char *get_remote_object_url(const char *url, const char *hex,
1663 int only_two_digit_prefix)
1664 {
1665 struct strbuf buf = STRBUF_INIT;
1666 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1667 return strbuf_detach(&buf, NULL);
1668 }
1669
1670 void normalize_curl_result(CURLcode *result, long http_code,
1671 char *errorstr, size_t errorlen)
1672 {
1673 /*
1674 * If we see a failing http code with CURLE_OK, we have turned off
1675 * FAILONERROR (to keep the server's custom error response), and should
1676 * translate the code into failure here.
1677 *
1678 * Likewise, if we see a redirect (30x code), that means we turned off
1679 * redirect-following, and we should treat the result as an error.
1680 */
1681 if (*result == CURLE_OK && http_code >= 300) {
1682 *result = CURLE_HTTP_RETURNED_ERROR;
1683 /*
1684 * Normally curl will already have put the "reason phrase"
1685 * from the server into curl_errorstr; unfortunately without
1686 * FAILONERROR it is lost, so we can give only the numeric
1687 * status code.
1688 */
1689 xsnprintf(errorstr, errorlen,
1690 "The requested URL returned error: %ld",
1691 http_code);
1692 }
1693 }
1694
1695 static int handle_curl_result(struct slot_results *results)
1696 {
1697 normalize_curl_result(&results->curl_result, results->http_code,
1698 curl_errorstr, sizeof(curl_errorstr));
1699
1700 if (results->curl_result == CURLE_OK) {
1701 credential_approve(&http_auth);
1702 credential_approve(&proxy_auth);
1703 credential_approve(&cert_auth);
1704 return HTTP_OK;
1705 } else if (results->curl_result == CURLE_SSL_CERTPROBLEM) {
1706 /*
1707 * We can't tell from here whether it's a bad path, bad
1708 * certificate, bad password, or something else wrong
1709 * with the certificate. So we reject the credential to
1710 * avoid caching or saving a bad password.
1711 */
1712 credential_reject(&cert_auth);
1713 return HTTP_NOAUTH;
1714 #ifdef GIT_CURL_HAVE_CURLE_SSL_PINNEDPUBKEYNOTMATCH
1715 } else if (results->curl_result == CURLE_SSL_PINNEDPUBKEYNOTMATCH) {
1716 return HTTP_NOMATCHPUBLICKEY;
1717 #endif
1718 } else if (missing_target(results))
1719 return HTTP_MISSING_TARGET;
1720 else if (results->http_code == 401) {
1721 if (http_auth.username && http_auth.password) {
1722 credential_reject(&http_auth);
1723 return HTTP_NOAUTH;
1724 } else {
1725 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1726 if (results->auth_avail) {
1727 http_auth_methods &= results->auth_avail;
1728 http_auth_methods_restricted = 1;
1729 }
1730 return HTTP_REAUTH;
1731 }
1732 } else {
1733 if (results->http_connectcode == 407)
1734 credential_reject(&proxy_auth);
1735 if (!curl_errorstr[0])
1736 strlcpy(curl_errorstr,
1737 curl_easy_strerror(results->curl_result),
1738 sizeof(curl_errorstr));
1739 return HTTP_ERROR;
1740 }
1741 }
1742
1743 int run_one_slot(struct active_request_slot *slot,
1744 struct slot_results *results)
1745 {
1746 slot->results = results;
1747 if (!start_active_slot(slot)) {
1748 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1749 "failed to start HTTP request");
1750 return HTTP_START_FAILED;
1751 }
1752
1753 run_active_slot(slot);
1754 return handle_curl_result(results);
1755 }
1756
1757 struct curl_slist *http_copy_default_headers(void)
1758 {
1759 struct curl_slist *headers = NULL;
1760 const struct string_list_item *item;
1761
1762 for_each_string_list_item(item, &extra_http_headers)
1763 headers = curl_slist_append(headers, item->string);
1764
1765 return headers;
1766 }
1767
1768 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1769 {
1770 char *ptr;
1771 CURLcode ret;
1772
1773 strbuf_reset(buf);
1774 ret = curl_easy_getinfo(curl, info, &ptr);
1775 if (!ret && ptr)
1776 strbuf_addstr(buf, ptr);
1777 return ret;
1778 }
1779
1780 /*
1781 * Check for and extract a content-type parameter. "raw"
1782 * should be positioned at the start of the potential
1783 * parameter, with any whitespace already removed.
1784 *
1785 * "name" is the name of the parameter. The value is appended
1786 * to "out".
1787 */
1788 static int extract_param(const char *raw, const char *name,
1789 struct strbuf *out)
1790 {
1791 size_t len = strlen(name);
1792
1793 if (strncasecmp(raw, name, len))
1794 return -1;
1795 raw += len;
1796
1797 if (*raw != '=')
1798 return -1;
1799 raw++;
1800
1801 while (*raw && !isspace(*raw) && *raw != ';')
1802 strbuf_addch(out, *raw++);
1803 return 0;
1804 }
1805
1806 /*
1807 * Extract a normalized version of the content type, with any
1808 * spaces suppressed, all letters lowercased, and no trailing ";"
1809 * or parameters.
1810 *
1811 * Note that we will silently remove even invalid whitespace. For
1812 * example, "text / plain" is specifically forbidden by RFC 2616,
1813 * but "text/plain" is the only reasonable output, and this keeps
1814 * our code simple.
1815 *
1816 * If the "charset" argument is not NULL, store the value of any
1817 * charset parameter there.
1818 *
1819 * Example:
1820 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1821 * "text / plain" -> "text/plain"
1822 */
1823 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1824 struct strbuf *charset)
1825 {
1826 const char *p;
1827
1828 strbuf_reset(type);
1829 strbuf_grow(type, raw->len);
1830 for (p = raw->buf; *p; p++) {
1831 if (isspace(*p))
1832 continue;
1833 if (*p == ';') {
1834 p++;
1835 break;
1836 }
1837 strbuf_addch(type, tolower(*p));
1838 }
1839
1840 if (!charset)
1841 return;
1842
1843 strbuf_reset(charset);
1844 while (*p) {
1845 while (isspace(*p) || *p == ';')
1846 p++;
1847 if (!extract_param(p, "charset", charset))
1848 return;
1849 while (*p && !isspace(*p))
1850 p++;
1851 }
1852
1853 if (!charset->len && starts_with(type->buf, "text/"))
1854 strbuf_addstr(charset, "ISO-8859-1");
1855 }
1856
1857 static void write_accept_language(struct strbuf *buf)
1858 {
1859 /*
1860 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1861 * that, q-value will be smaller than 0.001, the minimum q-value the
1862 * HTTP specification allows. See
1863 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1864 */
1865 const int MAX_DECIMAL_PLACES = 3;
1866 const int MAX_LANGUAGE_TAGS = 1000;
1867 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1868 char **language_tags = NULL;
1869 int num_langs = 0;
1870 const char *s = get_preferred_languages();
1871 int i;
1872 struct strbuf tag = STRBUF_INIT;
1873
1874 /* Don't add Accept-Language header if no language is preferred. */
1875 if (!s)
1876 return;
1877
1878 /*
1879 * Split the colon-separated string of preferred languages into
1880 * language_tags array.
1881 */
1882 do {
1883 /* collect language tag */
1884 for (; *s && (isalnum(*s) || *s == '_'); s++)
1885 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1886
1887 /* skip .codeset, @modifier and any other unnecessary parts */
1888 while (*s && *s != ':')
1889 s++;
1890
1891 if (tag.len) {
1892 num_langs++;
1893 REALLOC_ARRAY(language_tags, num_langs);
1894 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1895 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1896 break;
1897 }
1898 } while (*s++);
1899
1900 /* write Accept-Language header into buf */
1901 if (num_langs) {
1902 int last_buf_len = 0;
1903 int max_q;
1904 int decimal_places;
1905 char q_format[32];
1906
1907 /* add '*' */
1908 REALLOC_ARRAY(language_tags, num_langs + 1);
1909 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1910
1911 /* compute decimal_places */
1912 for (max_q = 1, decimal_places = 0;
1913 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1914 decimal_places++, max_q *= 10)
1915 ;
1916
1917 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1918
1919 strbuf_addstr(buf, "Accept-Language: ");
1920
1921 for (i = 0; i < num_langs; i++) {
1922 if (i > 0)
1923 strbuf_addstr(buf, ", ");
1924
1925 strbuf_addstr(buf, language_tags[i]);
1926
1927 if (i > 0)
1928 strbuf_addf(buf, q_format, max_q - i);
1929
1930 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1931 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1932 break;
1933 }
1934
1935 last_buf_len = buf->len;
1936 }
1937 }
1938
1939 /* free language tags -- last one is a static '*' */
1940 for (i = 0; i < num_langs - 1; i++)
1941 free(language_tags[i]);
1942 free(language_tags);
1943 }
1944
1945 /*
1946 * Get an Accept-Language header which indicates user's preferred languages.
1947 *
1948 * Examples:
1949 * LANGUAGE= -> ""
1950 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1951 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1952 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1953 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1954 * LANGUAGE= LANG=C -> ""
1955 */
1956 const char *http_get_accept_language_header(void)
1957 {
1958 if (!cached_accept_language) {
1959 struct strbuf buf = STRBUF_INIT;
1960 write_accept_language(&buf);
1961 if (buf.len > 0)
1962 cached_accept_language = strbuf_detach(&buf, NULL);
1963 }
1964
1965 return cached_accept_language;
1966 }
1967
1968 static void http_opt_request_remainder(CURL *curl, off_t pos)
1969 {
1970 char buf[128];
1971 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1972 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1973 }
1974
1975 /* http_request() targets */
1976 #define HTTP_REQUEST_STRBUF 0
1977 #define HTTP_REQUEST_FILE 1
1978
1979 static int http_request(const char *url,
1980 void *result, int target,
1981 const struct http_get_options *options)
1982 {
1983 struct active_request_slot *slot;
1984 struct slot_results results;
1985 struct curl_slist *headers = http_copy_default_headers();
1986 struct strbuf buf = STRBUF_INIT;
1987 const char *accept_language;
1988 int ret;
1989
1990 slot = get_active_slot();
1991 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1992
1993 if (!result) {
1994 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1995 } else {
1996 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1997 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, result);
1998
1999 if (target == HTTP_REQUEST_FILE) {
2000 off_t posn = ftello(result);
2001 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
2002 fwrite);
2003 if (posn > 0)
2004 http_opt_request_remainder(slot->curl, posn);
2005 } else
2006 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
2007 fwrite_buffer);
2008 }
2009
2010 curl_easy_setopt(slot->curl, CURLOPT_HEADERFUNCTION, fwrite_wwwauth);
2011
2012 accept_language = http_get_accept_language_header();
2013
2014 if (accept_language)
2015 headers = curl_slist_append(headers, accept_language);
2016
2017 strbuf_addstr(&buf, "Pragma:");
2018 if (options && options->no_cache)
2019 strbuf_addstr(&buf, " no-cache");
2020 if (options && options->initial_request &&
2021 http_follow_config == HTTP_FOLLOW_INITIAL)
2022 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
2023
2024 headers = curl_slist_append(headers, buf.buf);
2025
2026 /* Add additional headers here */
2027 if (options && options->extra_headers) {
2028 const struct string_list_item *item;
2029 for_each_string_list_item(item, options->extra_headers) {
2030 headers = curl_slist_append(headers, item->string);
2031 }
2032 }
2033
2034 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2035 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
2036 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
2037 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
2038
2039 ret = run_one_slot(slot, &results);
2040
2041 if (options && options->content_type) {
2042 struct strbuf raw = STRBUF_INIT;
2043 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
2044 extract_content_type(&raw, options->content_type,
2045 options->charset);
2046 strbuf_release(&raw);
2047 }
2048
2049 if (options && options->effective_url)
2050 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
2051 options->effective_url);
2052
2053 curl_slist_free_all(headers);
2054 strbuf_release(&buf);
2055
2056 return ret;
2057 }
2058
2059 /*
2060 * Update the "base" url to a more appropriate value, as deduced by
2061 * redirects seen when requesting a URL starting with "url".
2062 *
2063 * The "asked" parameter is a URL that we asked curl to access, and must begin
2064 * with "base".
2065 *
2066 * The "got" parameter is the URL that curl reported to us as where we ended
2067 * up.
2068 *
2069 * Returns 1 if we updated the base url, 0 otherwise.
2070 *
2071 * Our basic strategy is to compare "base" and "asked" to find the bits
2072 * specific to our request. We then strip those bits off of "got" to yield the
2073 * new base. So for example, if our base is "http://example.com/foo.git",
2074 * and we ask for "http://example.com/foo.git/info/refs", we might end up
2075 * with "https://other.example.com/foo.git/info/refs". We would want the
2076 * new URL to become "https://other.example.com/foo.git".
2077 *
2078 * Note that this assumes a sane redirect scheme. It's entirely possible
2079 * in the example above to end up at a URL that does not even end in
2080 * "info/refs". In such a case we die. There's not much we can do, such a
2081 * scheme is unlikely to represent a real git repository, and failing to
2082 * rewrite the base opens options for malicious redirects to do funny things.
2083 */
2084 static int update_url_from_redirect(struct strbuf *base,
2085 const char *asked,
2086 const struct strbuf *got)
2087 {
2088 const char *tail;
2089 size_t new_len;
2090
2091 if (!strcmp(asked, got->buf))
2092 return 0;
2093
2094 if (!skip_prefix(asked, base->buf, &tail))
2095 BUG("update_url_from_redirect: %s is not a superset of %s",
2096 asked, base->buf);
2097
2098 new_len = got->len;
2099 if (!strip_suffix_mem(got->buf, &new_len, tail))
2100 die(_("unable to update url base from redirection:\n"
2101 " asked for: %s\n"
2102 " redirect: %s"),
2103 asked, got->buf);
2104
2105 strbuf_reset(base);
2106 strbuf_add(base, got->buf, new_len);
2107
2108 return 1;
2109 }
2110
2111 static int http_request_reauth(const char *url,
2112 void *result, int target,
2113 struct http_get_options *options)
2114 {
2115 int ret = http_request(url, result, target, options);
2116
2117 if (ret != HTTP_OK && ret != HTTP_REAUTH)
2118 return ret;
2119
2120 if (options && options->effective_url && options->base_url) {
2121 if (update_url_from_redirect(options->base_url,
2122 url, options->effective_url)) {
2123 credential_from_url(&http_auth, options->base_url->buf);
2124 url = options->effective_url->buf;
2125 }
2126 }
2127
2128 if (ret != HTTP_REAUTH)
2129 return ret;
2130
2131 /*
2132 * The previous request may have put cruft into our output stream; we
2133 * should clear it out before making our next request.
2134 */
2135 switch (target) {
2136 case HTTP_REQUEST_STRBUF:
2137 strbuf_reset(result);
2138 break;
2139 case HTTP_REQUEST_FILE:
2140 if (fflush(result)) {
2141 error_errno("unable to flush a file");
2142 return HTTP_START_FAILED;
2143 }
2144 rewind(result);
2145 if (ftruncate(fileno(result), 0) < 0) {
2146 error_errno("unable to truncate a file");
2147 return HTTP_START_FAILED;
2148 }
2149 break;
2150 default:
2151 BUG("Unknown http_request target");
2152 }
2153
2154 credential_fill(&http_auth);
2155
2156 return http_request(url, result, target, options);
2157 }
2158
2159 int http_get_strbuf(const char *url,
2160 struct strbuf *result,
2161 struct http_get_options *options)
2162 {
2163 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
2164 }
2165
2166 /*
2167 * Downloads a URL and stores the result in the given file.
2168 *
2169 * If a previous interrupted download is detected (i.e. a previous temporary
2170 * file is still around) the download is resumed.
2171 */
2172 int http_get_file(const char *url, const char *filename,
2173 struct http_get_options *options)
2174 {
2175 int ret;
2176 struct strbuf tmpfile = STRBUF_INIT;
2177 FILE *result;
2178
2179 strbuf_addf(&tmpfile, "%s.temp", filename);
2180 result = fopen(tmpfile.buf, "a");
2181 if (!result) {
2182 error("Unable to open local file %s", tmpfile.buf);
2183 ret = HTTP_ERROR;
2184 goto cleanup;
2185 }
2186
2187 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
2188 fclose(result);
2189
2190 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
2191 ret = HTTP_ERROR;
2192 cleanup:
2193 strbuf_release(&tmpfile);
2194 return ret;
2195 }
2196
2197 int http_fetch_ref(const char *base, struct ref *ref)
2198 {
2199 struct http_get_options options = {0};
2200 char *url;
2201 struct strbuf buffer = STRBUF_INIT;
2202 int ret = -1;
2203
2204 options.no_cache = 1;
2205
2206 url = quote_ref_url(base, ref->name);
2207 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
2208 strbuf_rtrim(&buffer);
2209 if (buffer.len == the_hash_algo->hexsz)
2210 ret = get_oid_hex(buffer.buf, &ref->old_oid);
2211 else if (starts_with(buffer.buf, "ref: ")) {
2212 ref->symref = xstrdup(buffer.buf + 5);
2213 ret = 0;
2214 }
2215 }
2216
2217 strbuf_release(&buffer);
2218 free(url);
2219 return ret;
2220 }
2221
2222 /* Helpers for fetching packs */
2223 static char *fetch_pack_index(unsigned char *hash, const char *base_url)
2224 {
2225 char *url, *tmp;
2226 struct strbuf buf = STRBUF_INIT;
2227
2228 if (http_is_verbose)
2229 fprintf(stderr, "Getting index for pack %s\n", hash_to_hex(hash));
2230
2231 end_url_with_slash(&buf, base_url);
2232 strbuf_addf(&buf, "objects/pack/pack-%s.idx", hash_to_hex(hash));
2233 url = strbuf_detach(&buf, NULL);
2234
2235 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(hash));
2236 tmp = strbuf_detach(&buf, NULL);
2237
2238 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
2239 error("Unable to get pack index %s", url);
2240 FREE_AND_NULL(tmp);
2241 }
2242
2243 free(url);
2244 return tmp;
2245 }
2246
2247 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
2248 unsigned char *sha1, const char *base_url)
2249 {
2250 struct packed_git *new_pack;
2251 char *tmp_idx = NULL;
2252 int ret;
2253
2254 if (has_pack_index(sha1)) {
2255 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2256 if (!new_pack)
2257 return -1; /* parse_pack_index() already issued error message */
2258 goto add_pack;
2259 }
2260
2261 tmp_idx = fetch_pack_index(sha1, base_url);
2262 if (!tmp_idx)
2263 return -1;
2264
2265 new_pack = parse_pack_index(sha1, tmp_idx);
2266 if (!new_pack) {
2267 unlink(tmp_idx);
2268 free(tmp_idx);
2269
2270 return -1; /* parse_pack_index() already issued error message */
2271 }
2272
2273 ret = verify_pack_index(new_pack);
2274 if (!ret) {
2275 close_pack_index(new_pack);
2276 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2277 }
2278 free(tmp_idx);
2279 if (ret)
2280 return -1;
2281
2282 add_pack:
2283 new_pack->next = *packs_head;
2284 *packs_head = new_pack;
2285 return 0;
2286 }
2287
2288 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2289 {
2290 struct http_get_options options = {0};
2291 int ret = 0;
2292 char *url;
2293 const char *data;
2294 struct strbuf buf = STRBUF_INIT;
2295 struct object_id oid;
2296
2297 end_url_with_slash(&buf, base_url);
2298 strbuf_addstr(&buf, "objects/info/packs");
2299 url = strbuf_detach(&buf, NULL);
2300
2301 options.no_cache = 1;
2302 ret = http_get_strbuf(url, &buf, &options);
2303 if (ret != HTTP_OK)
2304 goto cleanup;
2305
2306 data = buf.buf;
2307 while (*data) {
2308 if (skip_prefix(data, "P pack-", &data) &&
2309 !parse_oid_hex(data, &oid, &data) &&
2310 skip_prefix(data, ".pack", &data) &&
2311 (*data == '\n' || *data == '\0')) {
2312 fetch_and_setup_pack_index(packs_head, oid.hash, base_url);
2313 } else {
2314 data = strchrnul(data, '\n');
2315 }
2316 if (*data)
2317 data++; /* skip past newline */
2318 }
2319
2320 cleanup:
2321 free(url);
2322 return ret;
2323 }
2324
2325 void release_http_pack_request(struct http_pack_request *preq)
2326 {
2327 if (preq->packfile) {
2328 fclose(preq->packfile);
2329 preq->packfile = NULL;
2330 }
2331 preq->slot = NULL;
2332 strbuf_release(&preq->tmpfile);
2333 free(preq->url);
2334 free(preq);
2335 }
2336
2337 static const char *default_index_pack_args[] =
2338 {"index-pack", "--stdin", NULL};
2339
2340 int finish_http_pack_request(struct http_pack_request *preq)
2341 {
2342 struct child_process ip = CHILD_PROCESS_INIT;
2343 int tmpfile_fd;
2344 int ret = 0;
2345
2346 fclose(preq->packfile);
2347 preq->packfile = NULL;
2348
2349 tmpfile_fd = xopen(preq->tmpfile.buf, O_RDONLY);
2350
2351 ip.git_cmd = 1;
2352 ip.in = tmpfile_fd;
2353 strvec_pushv(&ip.args, preq->index_pack_args ?
2354 preq->index_pack_args :
2355 default_index_pack_args);
2356
2357 if (preq->preserve_index_pack_stdout)
2358 ip.out = 0;
2359 else
2360 ip.no_stdout = 1;
2361
2362 if (run_command(&ip)) {
2363 ret = -1;
2364 goto cleanup;
2365 }
2366
2367 cleanup:
2368 close(tmpfile_fd);
2369 unlink(preq->tmpfile.buf);
2370 return ret;
2371 }
2372
2373 void http_install_packfile(struct packed_git *p,
2374 struct packed_git **list_to_remove_from)
2375 {
2376 struct packed_git **lst = list_to_remove_from;
2377
2378 while (*lst != p)
2379 lst = &((*lst)->next);
2380 *lst = (*lst)->next;
2381
2382 install_packed_git(the_repository, p);
2383 }
2384
2385 struct http_pack_request *new_http_pack_request(
2386 const unsigned char *packed_git_hash, const char *base_url) {
2387
2388 struct strbuf buf = STRBUF_INIT;
2389
2390 end_url_with_slash(&buf, base_url);
2391 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2392 hash_to_hex(packed_git_hash));
2393 return new_direct_http_pack_request(packed_git_hash,
2394 strbuf_detach(&buf, NULL));
2395 }
2396
2397 struct http_pack_request *new_direct_http_pack_request(
2398 const unsigned char *packed_git_hash, char *url)
2399 {
2400 off_t prev_posn = 0;
2401 struct http_pack_request *preq;
2402
2403 CALLOC_ARRAY(preq, 1);
2404 strbuf_init(&preq->tmpfile, 0);
2405
2406 preq->url = url;
2407
2408 strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(packed_git_hash));
2409 preq->packfile = fopen(preq->tmpfile.buf, "a");
2410 if (!preq->packfile) {
2411 error("Unable to open local file %s for pack",
2412 preq->tmpfile.buf);
2413 goto abort;
2414 }
2415
2416 preq->slot = get_active_slot();
2417 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEDATA, preq->packfile);
2418 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2419 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2420 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2421 no_pragma_header);
2422
2423 /*
2424 * If there is data present from a previous transfer attempt,
2425 * resume where it left off
2426 */
2427 prev_posn = ftello(preq->packfile);
2428 if (prev_posn>0) {
2429 if (http_is_verbose)
2430 fprintf(stderr,
2431 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2432 hash_to_hex(packed_git_hash),
2433 (uintmax_t)prev_posn);
2434 http_opt_request_remainder(preq->slot->curl, prev_posn);
2435 }
2436
2437 return preq;
2438
2439 abort:
2440 strbuf_release(&preq->tmpfile);
2441 free(preq->url);
2442 free(preq);
2443 return NULL;
2444 }
2445
2446 /* Helpers for fetching objects (loose) */
2447 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2448 void *data)
2449 {
2450 unsigned char expn[4096];
2451 size_t size = eltsize * nmemb;
2452 int posn = 0;
2453 struct http_object_request *freq = data;
2454 struct active_request_slot *slot = freq->slot;
2455
2456 if (slot) {
2457 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2458 &slot->http_code);
2459 if (c != CURLE_OK)
2460 BUG("curl_easy_getinfo for HTTP code failed: %s",
2461 curl_easy_strerror(c));
2462 if (slot->http_code >= 300)
2463 return nmemb;
2464 }
2465
2466 do {
2467 ssize_t retval = xwrite(freq->localfile,
2468 (char *) ptr + posn, size - posn);
2469 if (retval < 0)
2470 return posn / eltsize;
2471 posn += retval;
2472 } while (posn < size);
2473
2474 freq->stream.avail_in = size;
2475 freq->stream.next_in = (void *)ptr;
2476 do {
2477 freq->stream.next_out = expn;
2478 freq->stream.avail_out = sizeof(expn);
2479 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2480 the_hash_algo->update_fn(&freq->c, expn,
2481 sizeof(expn) - freq->stream.avail_out);
2482 } while (freq->stream.avail_in && freq->zret == Z_OK);
2483 return nmemb;
2484 }
2485
2486 struct http_object_request *new_http_object_request(const char *base_url,
2487 const struct object_id *oid)
2488 {
2489 char *hex = oid_to_hex(oid);
2490 struct strbuf filename = STRBUF_INIT;
2491 struct strbuf prevfile = STRBUF_INIT;
2492 int prevlocal;
2493 char prev_buf[PREV_BUF_SIZE];
2494 ssize_t prev_read = 0;
2495 off_t prev_posn = 0;
2496 struct http_object_request *freq;
2497
2498 CALLOC_ARRAY(freq, 1);
2499 strbuf_init(&freq->tmpfile, 0);
2500 oidcpy(&freq->oid, oid);
2501 freq->localfile = -1;
2502
2503 loose_object_path(the_repository, &filename, oid);
2504 strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
2505
2506 strbuf_addf(&prevfile, "%s.prev", filename.buf);
2507 unlink_or_warn(prevfile.buf);
2508 rename(freq->tmpfile.buf, prevfile.buf);
2509 unlink_or_warn(freq->tmpfile.buf);
2510 strbuf_release(&filename);
2511
2512 if (freq->localfile != -1)
2513 error("fd leakage in start: %d", freq->localfile);
2514 freq->localfile = open(freq->tmpfile.buf,
2515 O_WRONLY | O_CREAT | O_EXCL, 0666);
2516 /*
2517 * This could have failed due to the "lazy directory creation";
2518 * try to mkdir the last path component.
2519 */
2520 if (freq->localfile < 0 && errno == ENOENT) {
2521 char *dir = strrchr(freq->tmpfile.buf, '/');
2522 if (dir) {
2523 *dir = 0;
2524 mkdir(freq->tmpfile.buf, 0777);
2525 *dir = '/';
2526 }
2527 freq->localfile = open(freq->tmpfile.buf,
2528 O_WRONLY | O_CREAT | O_EXCL, 0666);
2529 }
2530
2531 if (freq->localfile < 0) {
2532 error_errno("Couldn't create temporary file %s",
2533 freq->tmpfile.buf);
2534 goto abort;
2535 }
2536
2537 git_inflate_init(&freq->stream);
2538
2539 the_hash_algo->init_fn(&freq->c);
2540
2541 freq->url = get_remote_object_url(base_url, hex, 0);
2542
2543 /*
2544 * If a previous temp file is present, process what was already
2545 * fetched.
2546 */
2547 prevlocal = open(prevfile.buf, O_RDONLY);
2548 if (prevlocal != -1) {
2549 do {
2550 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2551 if (prev_read>0) {
2552 if (fwrite_sha1_file(prev_buf,
2553 1,
2554 prev_read,
2555 freq) == prev_read) {
2556 prev_posn += prev_read;
2557 } else {
2558 prev_read = -1;
2559 }
2560 }
2561 } while (prev_read > 0);
2562 close(prevlocal);
2563 }
2564 unlink_or_warn(prevfile.buf);
2565 strbuf_release(&prevfile);
2566
2567 /*
2568 * Reset inflate/SHA1 if there was an error reading the previous temp
2569 * file; also rewind to the beginning of the local file.
2570 */
2571 if (prev_read == -1) {
2572 memset(&freq->stream, 0, sizeof(freq->stream));
2573 git_inflate_init(&freq->stream);
2574 the_hash_algo->init_fn(&freq->c);
2575 if (prev_posn>0) {
2576 prev_posn = 0;
2577 lseek(freq->localfile, 0, SEEK_SET);
2578 if (ftruncate(freq->localfile, 0) < 0) {
2579 error_errno("Couldn't truncate temporary file %s",
2580 freq->tmpfile.buf);
2581 goto abort;
2582 }
2583 }
2584 }
2585
2586 freq->slot = get_active_slot();
2587
2588 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEDATA, freq);
2589 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2590 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2591 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2592 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2593 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2594
2595 /*
2596 * If we have successfully processed data from a previous fetch
2597 * attempt, only fetch the data we don't already have.
2598 */
2599 if (prev_posn>0) {
2600 if (http_is_verbose)
2601 fprintf(stderr,
2602 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2603 hex, (uintmax_t)prev_posn);
2604 http_opt_request_remainder(freq->slot->curl, prev_posn);
2605 }
2606
2607 return freq;
2608
2609 abort:
2610 strbuf_release(&prevfile);
2611 free(freq->url);
2612 free(freq);
2613 return NULL;
2614 }
2615
2616 void process_http_object_request(struct http_object_request *freq)
2617 {
2618 if (!freq->slot)
2619 return;
2620 freq->curl_result = freq->slot->curl_result;
2621 freq->http_code = freq->slot->http_code;
2622 freq->slot = NULL;
2623 }
2624
2625 int finish_http_object_request(struct http_object_request *freq)
2626 {
2627 struct stat st;
2628 struct strbuf filename = STRBUF_INIT;
2629
2630 close(freq->localfile);
2631 freq->localfile = -1;
2632
2633 process_http_object_request(freq);
2634
2635 if (freq->http_code == 416) {
2636 warning("requested range invalid; we may already have all the data.");
2637 } else if (freq->curl_result != CURLE_OK) {
2638 if (stat(freq->tmpfile.buf, &st) == 0)
2639 if (st.st_size == 0)
2640 unlink_or_warn(freq->tmpfile.buf);
2641 return -1;
2642 }
2643
2644 git_inflate_end(&freq->stream);
2645 the_hash_algo->final_oid_fn(&freq->real_oid, &freq->c);
2646 if (freq->zret != Z_STREAM_END) {
2647 unlink_or_warn(freq->tmpfile.buf);
2648 return -1;
2649 }
2650 if (!oideq(&freq->oid, &freq->real_oid)) {
2651 unlink_or_warn(freq->tmpfile.buf);
2652 return -1;
2653 }
2654 loose_object_path(the_repository, &filename, &freq->oid);
2655 freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
2656 strbuf_release(&filename);
2657
2658 return freq->rename;
2659 }
2660
2661 void abort_http_object_request(struct http_object_request *freq)
2662 {
2663 unlink_or_warn(freq->tmpfile.buf);
2664
2665 release_http_object_request(freq);
2666 }
2667
2668 void release_http_object_request(struct http_object_request *freq)
2669 {
2670 if (freq->localfile != -1) {
2671 close(freq->localfile);
2672 freq->localfile = -1;
2673 }
2674 FREE_AND_NULL(freq->url);
2675 if (freq->slot) {
2676 freq->slot->callback_func = NULL;
2677 freq->slot->callback_data = NULL;
2678 release_active_slot(freq->slot);
2679 freq->slot = NULL;
2680 }
2681 strbuf_release(&freq->tmpfile);
2682 }
Alternate source for your git.git needs