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diff.h: move declaration for global in diff.c from cache.h
[git/debian.git] / http.c
blobbb58bb3e6a3a47163b911d8276f5c185eada003b
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_cert_type;
46 static const char *ssl_cipherlist;
47 static const char *ssl_version;
48 static struct {
49 const char *name;
50 long ssl_version;
51 } sslversions[] = {
52 { "sslv2", CURL_SSLVERSION_SSLv2 },
53 { "sslv3", CURL_SSLVERSION_SSLv3 },
54 { "tlsv1", CURL_SSLVERSION_TLSv1 },
55 #ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_0
56 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
57 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
58 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
59 #endif
60 #ifdef GIT_CURL_HAVE_CURL_SSLVERSION_TLSv1_3
61 { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
62 #endif
63 };
64 static const char *ssl_key;
65 static const char *ssl_key_type;
66 static const char *ssl_capath;
67 static const char *curl_no_proxy;
68 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
69 static const char *ssl_pinnedkey;
70 #endif
71 static const char *ssl_cainfo;
72 static long curl_low_speed_limit = -1;
73 static long curl_low_speed_time = -1;
74 static int curl_ftp_no_epsv;
75 static const char *curl_http_proxy;
76 static const char *http_proxy_authmethod;
77
78 static const char *http_proxy_ssl_cert;
79 static const char *http_proxy_ssl_key;
80 static const char *http_proxy_ssl_ca_info;
81 static struct credential proxy_cert_auth = CREDENTIAL_INIT;
82 static int proxy_ssl_cert_password_required;
83
84 static struct {
85 const char *name;
86 long curlauth_param;
87 } proxy_authmethods[] = {
88 { "basic", CURLAUTH_BASIC },
89 { "digest", CURLAUTH_DIGEST },
90 { "negotiate", CURLAUTH_GSSNEGOTIATE },
91 { "ntlm", CURLAUTH_NTLM },
92 { "anyauth", CURLAUTH_ANY },
93 /*
94 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
95 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
96 * here, too
97 */
98 };
99 #ifdef CURLGSSAPI_DELEGATION_FLAG
100 static const char *curl_deleg;
101 static struct {
102 const char *name;
103 long curl_deleg_param;
104 } curl_deleg_levels[] = {
105 { "none", CURLGSSAPI_DELEGATION_NONE },
106 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
107 { "always", CURLGSSAPI_DELEGATION_FLAG },
108 };
109 #endif
110
111 static struct credential proxy_auth = CREDENTIAL_INIT;
112 static const char *curl_proxyuserpwd;
113 static const char *curl_cookie_file;
114 static int curl_save_cookies;
115 struct credential http_auth = CREDENTIAL_INIT;
116 static int http_proactive_auth;
117 static const char *user_agent;
118 static int curl_empty_auth = -1;
119
120 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
121
122 static struct credential cert_auth = CREDENTIAL_INIT;
123 static int ssl_cert_password_required;
124 static unsigned long http_auth_methods = CURLAUTH_ANY;
125 static int http_auth_methods_restricted;
126 /* Modes for which empty_auth cannot actually help us. */
127 static unsigned long empty_auth_useless =
128 CURLAUTH_BASIC
129 | CURLAUTH_DIGEST_IE
130 | CURLAUTH_DIGEST;
131
132 static struct curl_slist *pragma_header;
133 static struct curl_slist *no_pragma_header;
134 static struct string_list extra_http_headers = STRING_LIST_INIT_DUP;
135
136 static struct curl_slist *host_resolutions;
137
138 static struct active_request_slot *active_queue_head;
139
140 static char *cached_accept_language;
141
142 static char *http_ssl_backend;
143
144 static int http_schannel_check_revoke = 1;
145 /*
146 * With the backend being set to `schannel`, setting sslCAinfo would override
147 * the Certificate Store in cURL v7.60.0 and later, which is not what we want
148 * by default.
149 */
150 static int http_schannel_use_ssl_cainfo;
151
152 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
153 {
154 size_t size = eltsize * nmemb;
155 struct buffer *buffer = buffer_;
156
157 if (size > buffer->buf.len - buffer->posn)
158 size = buffer->buf.len - buffer->posn;
159 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
160 buffer->posn += size;
161
162 return size / eltsize;
163 }
164
165 int seek_buffer(void *clientp, curl_off_t offset, int origin)
166 {
167 struct buffer *buffer = clientp;
168
169 if (origin != SEEK_SET)
170 BUG("seek_buffer only handles SEEK_SET");
171 if (offset < 0 || offset >= buffer->buf.len) {
172 error("curl seek would be outside of buffer");
173 return CURL_SEEKFUNC_FAIL;
174 }
175
176 buffer->posn = offset;
177 return CURL_SEEKFUNC_OK;
178 }
179
180 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
181 {
182 size_t size = eltsize * nmemb;
183 struct strbuf *buffer = buffer_;
184
185 strbuf_add(buffer, ptr, size);
186 return nmemb;
187 }
188
189 /*
190 * A folded header continuation line starts with any number of spaces or
191 * horizontal tab characters (SP or HTAB) as per RFC 7230 section 3.2.
192 * It is not a continuation line if the line starts with any other character.
193 */
194 static inline int is_hdr_continuation(const char *ptr, const size_t size)
195 {
196 return size && (*ptr == ' ' || *ptr == '\t');
197 }
198
199 static size_t fwrite_wwwauth(char *ptr, size_t eltsize, size_t nmemb, void *p)
200 {
201 size_t size = eltsize * nmemb;
202 struct strvec *values = &http_auth.wwwauth_headers;
203 struct strbuf buf = STRBUF_INIT;
204 const char *val;
205 size_t val_len;
206
207 /*
208 * Header lines may not come NULL-terminated from libcurl so we must
209 * limit all scans to the maximum length of the header line, or leverage
210 * strbufs for all operations.
211 *
212 * In addition, it is possible that header values can be split over
213 * multiple lines as per RFC 7230. 'Line folding' has been deprecated
214 * but older servers may still emit them. A continuation header field
215 * value is identified as starting with a space or horizontal tab.
216 *
217 * The formal definition of a header field as given in RFC 7230 is:
218 *
219 * header-field = field-name ":" OWS field-value OWS
220 *
221 * field-name = token
222 * field-value = *( field-content / obs-fold )
223 * field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
224 * field-vchar = VCHAR / obs-text
225 *
226 * obs-fold = CRLF 1*( SP / HTAB )
227 * ; obsolete line folding
228 * ; see Section 3.2.4
229 */
230
231 /* Start of a new WWW-Authenticate header */
232 if (skip_iprefix_mem(ptr, size, "www-authenticate:", &val, &val_len)) {
233 strbuf_add(&buf, val, val_len);
234
235 /*
236 * Strip the CRLF that should be present at the end of each
237 * field as well as any trailing or leading whitespace from the
238 * value.
239 */
240 strbuf_trim(&buf);
241
242 strvec_push(values, buf.buf);
243 http_auth.header_is_last_match = 1;
244 goto exit;
245 }
246
247 /*
248 * This line could be a continuation of the previously matched header
249 * field. If this is the case then we should append this value to the
250 * end of the previously consumed value.
251 */
252 if (http_auth.header_is_last_match && is_hdr_continuation(ptr, size)) {
253 /*
254 * Trim the CRLF and any leading or trailing from this line.
255 */
256 strbuf_add(&buf, ptr, size);
257 strbuf_trim(&buf);
258
259 /*
260 * At this point we should always have at least one existing
261 * value, even if it is empty. Do not bother appending the new
262 * value if this continuation header is itself empty.
263 */
264 if (!values->nr) {
265 BUG("should have at least one existing header value");
266 } else if (buf.len) {
267 char *prev = xstrdup(values->v[values->nr - 1]);
268
269 /* Join two non-empty values with a single space. */
270 const char *const sp = *prev ? " " : "";
271
272 strvec_pop(values);
273 strvec_pushf(values, "%s%s%s", prev, sp, buf.buf);
274 free(prev);
275 }
276
277 goto exit;
278 }
279
280 /* Not a continuation of a previously matched auth header line. */
281 http_auth.header_is_last_match = 0;
282
283 /*
284 * If this is a HTTP status line and not a header field, this signals
285 * a different HTTP response. libcurl writes all the output of all
286 * response headers of all responses, including redirects.
287 * We only care about the last HTTP request response's headers so clear
288 * the existing array.
289 */
290 if (skip_iprefix_mem(ptr, size, "http/", &val, &val_len))
291 strvec_clear(values);
292
293 exit:
294 strbuf_release(&buf);
295 return size;
296 }
297
298 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
299 {
300 return nmemb;
301 }
302
303 static void closedown_active_slot(struct active_request_slot *slot)
304 {
305 active_requests--;
306 slot->in_use = 0;
307 }
308
309 static void finish_active_slot(struct active_request_slot *slot)
310 {
311 closedown_active_slot(slot);
312 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
313
314 if (slot->finished)
315 (*slot->finished) = 1;
316
317 /* Store slot results so they can be read after the slot is reused */
318 if (slot->results) {
319 slot->results->curl_result = slot->curl_result;
320 slot->results->http_code = slot->http_code;
321 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
322 &slot->results->auth_avail);
323
324 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
325 &slot->results->http_connectcode);
326 }
327
328 /* Run callback if appropriate */
329 if (slot->callback_func)
330 slot->callback_func(slot->callback_data);
331 }
332
333 static void xmulti_remove_handle(struct active_request_slot *slot)
334 {
335 curl_multi_remove_handle(curlm, slot->curl);
336 }
337
338 static void process_curl_messages(void)
339 {
340 int num_messages;
341 struct active_request_slot *slot;
342 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
343
344 while (curl_message != NULL) {
345 if (curl_message->msg == CURLMSG_DONE) {
346 int curl_result = curl_message->data.result;
347 slot = active_queue_head;
348 while (slot != NULL &&
349 slot->curl != curl_message->easy_handle)
350 slot = slot->next;
351 if (slot) {
352 xmulti_remove_handle(slot);
353 slot->curl_result = curl_result;
354 finish_active_slot(slot);
355 } else {
356 fprintf(stderr, "Received DONE message for unknown request!\n");
357 }
358 } else {
359 fprintf(stderr, "Unknown CURL message received: %d\n",
360 (int)curl_message->msg);
361 }
362 curl_message = curl_multi_info_read(curlm, &num_messages);
363 }
364 }
365
366 static int http_options(const char *var, const char *value, void *cb)
367 {
368 if (!strcmp("http.version", var)) {
369 return git_config_string(&curl_http_version, var, value);
370 }
371 if (!strcmp("http.sslverify", var)) {
372 curl_ssl_verify = git_config_bool(var, value);
373 return 0;
374 }
375 if (!strcmp("http.sslcipherlist", var))
376 return git_config_string(&ssl_cipherlist, var, value);
377 if (!strcmp("http.sslversion", var))
378 return git_config_string(&ssl_version, var, value);
379 if (!strcmp("http.sslcert", var))
380 return git_config_pathname(&ssl_cert, var, value);
381 if (!strcmp("http.sslcerttype", var))
382 return git_config_string(&ssl_cert_type, var, value);
383 if (!strcmp("http.sslkey", var))
384 return git_config_pathname(&ssl_key, var, value);
385 if (!strcmp("http.sslkeytype", var))
386 return git_config_string(&ssl_key_type, var, value);
387 if (!strcmp("http.sslcapath", var))
388 return git_config_pathname(&ssl_capath, var, value);
389 if (!strcmp("http.sslcainfo", var))
390 return git_config_pathname(&ssl_cainfo, var, value);
391 if (!strcmp("http.sslcertpasswordprotected", var)) {
392 ssl_cert_password_required = git_config_bool(var, value);
393 return 0;
394 }
395 if (!strcmp("http.ssltry", var)) {
396 curl_ssl_try = git_config_bool(var, value);
397 return 0;
398 }
399 if (!strcmp("http.sslbackend", var)) {
400 free(http_ssl_backend);
401 http_ssl_backend = xstrdup_or_null(value);
402 return 0;
403 }
404
405 if (!strcmp("http.schannelcheckrevoke", var)) {
406 http_schannel_check_revoke = git_config_bool(var, value);
407 return 0;
408 }
409
410 if (!strcmp("http.schannelusesslcainfo", var)) {
411 http_schannel_use_ssl_cainfo = git_config_bool(var, value);
412 return 0;
413 }
414
415 if (!strcmp("http.minsessions", var)) {
416 min_curl_sessions = git_config_int(var, value);
417 if (min_curl_sessions > 1)
418 min_curl_sessions = 1;
419 return 0;
420 }
421 if (!strcmp("http.maxrequests", var)) {
422 max_requests = git_config_int(var, value);
423 return 0;
424 }
425 if (!strcmp("http.lowspeedlimit", var)) {
426 curl_low_speed_limit = (long)git_config_int(var, value);
427 return 0;
428 }
429 if (!strcmp("http.lowspeedtime", var)) {
430 curl_low_speed_time = (long)git_config_int(var, value);
431 return 0;
432 }
433
434 if (!strcmp("http.noepsv", var)) {
435 curl_ftp_no_epsv = git_config_bool(var, value);
436 return 0;
437 }
438 if (!strcmp("http.proxy", var))
439 return git_config_string(&curl_http_proxy, var, value);
440
441 if (!strcmp("http.proxyauthmethod", var))
442 return git_config_string(&http_proxy_authmethod, var, value);
443
444 if (!strcmp("http.proxysslcert", var))
445 return git_config_string(&http_proxy_ssl_cert, var, value);
446
447 if (!strcmp("http.proxysslkey", var))
448 return git_config_string(&http_proxy_ssl_key, var, value);
449
450 if (!strcmp("http.proxysslcainfo", var))
451 return git_config_string(&http_proxy_ssl_ca_info, var, value);
452
453 if (!strcmp("http.proxysslcertpasswordprotected", var)) {
454 proxy_ssl_cert_password_required = git_config_bool(var, value);
455 return 0;
456 }
457
458 if (!strcmp("http.cookiefile", var))
459 return git_config_pathname(&curl_cookie_file, var, value);
460 if (!strcmp("http.savecookies", var)) {
461 curl_save_cookies = git_config_bool(var, value);
462 return 0;
463 }
464
465 if (!strcmp("http.postbuffer", var)) {
466 http_post_buffer = git_config_ssize_t(var, value);
467 if (http_post_buffer < 0)
468 warning(_("negative value for http.postBuffer; defaulting to %d"), LARGE_PACKET_MAX);
469 if (http_post_buffer < LARGE_PACKET_MAX)
470 http_post_buffer = LARGE_PACKET_MAX;
471 return 0;
472 }
473
474 if (!strcmp("http.useragent", var))
475 return git_config_string(&user_agent, var, value);
476
477 if (!strcmp("http.emptyauth", var)) {
478 if (value && !strcmp("auto", value))
479 curl_empty_auth = -1;
480 else
481 curl_empty_auth = git_config_bool(var, value);
482 return 0;
483 }
484
485 if (!strcmp("http.delegation", var)) {
486 #ifdef CURLGSSAPI_DELEGATION_FLAG
487 return git_config_string(&curl_deleg, var, value);
488 #else
489 warning(_("Delegation control is not supported with cURL < 7.22.0"));
490 return 0;
491 #endif
492 }
493
494 if (!strcmp("http.pinnedpubkey", var)) {
495 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
496 return git_config_pathname(&ssl_pinnedkey, var, value);
497 #else
498 warning(_("Public key pinning not supported with cURL < 7.39.0"));
499 return 0;
500 #endif
501 }
502
503 if (!strcmp("http.extraheader", var)) {
504 if (!value) {
505 return config_error_nonbool(var);
506 } else if (!*value) {
507 string_list_clear(&extra_http_headers, 0);
508 } else {
509 string_list_append(&extra_http_headers, value);
510 }
511 return 0;
512 }
513
514 if (!strcmp("http.curloptresolve", var)) {
515 if (!value) {
516 return config_error_nonbool(var);
517 } else if (!*value) {
518 curl_slist_free_all(host_resolutions);
519 host_resolutions = NULL;
520 } else {
521 host_resolutions = curl_slist_append(host_resolutions, value);
522 }
523 return 0;
524 }
525
526 if (!strcmp("http.followredirects", var)) {
527 if (value && !strcmp(value, "initial"))
528 http_follow_config = HTTP_FOLLOW_INITIAL;
529 else if (git_config_bool(var, value))
530 http_follow_config = HTTP_FOLLOW_ALWAYS;
531 else
532 http_follow_config = HTTP_FOLLOW_NONE;
533 return 0;
534 }
535
536 /* Fall back on the default ones */
537 return git_default_config(var, value, cb);
538 }
539
540 static int curl_empty_auth_enabled(void)
541 {
542 if (curl_empty_auth >= 0)
543 return curl_empty_auth;
544
545 /*
546 * In the automatic case, kick in the empty-auth
547 * hack as long as we would potentially try some
548 * method more exotic than "Basic" or "Digest".
549 *
550 * But only do this when this is our second or
551 * subsequent request, as by then we know what
552 * methods are available.
553 */
554 if (http_auth_methods_restricted &&
555 (http_auth_methods & ~empty_auth_useless))
556 return 1;
557 return 0;
558 }
559
560 static void init_curl_http_auth(CURL *result)
561 {
562 if (!http_auth.username || !*http_auth.username) {
563 if (curl_empty_auth_enabled())
564 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
565 return;
566 }
567
568 credential_fill(&http_auth);
569
570 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
571 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
572 }
573
574 /* *var must be free-able */
575 static void var_override(const char **var, char *value)
576 {
577 if (value) {
578 free((void *)*var);
579 *var = xstrdup(value);
580 }
581 }
582
583 static void set_proxyauth_name_password(CURL *result)
584 {
585 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
586 proxy_auth.username);
587 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
588 proxy_auth.password);
589 }
590
591 static void init_curl_proxy_auth(CURL *result)
592 {
593 if (proxy_auth.username) {
594 if (!proxy_auth.password)
595 credential_fill(&proxy_auth);
596 set_proxyauth_name_password(result);
597 }
598
599 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
600
601 if (http_proxy_authmethod) {
602 int i;
603 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
604 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
605 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
606 proxy_authmethods[i].curlauth_param);
607 break;
608 }
609 }
610 if (i == ARRAY_SIZE(proxy_authmethods)) {
611 warning("unsupported proxy authentication method %s: using anyauth",
612 http_proxy_authmethod);
613 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
614 }
615 }
616 else
617 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
618 }
619
620 static int has_cert_password(void)
621 {
622 if (ssl_cert == NULL || ssl_cert_password_required != 1)
623 return 0;
624 if (!cert_auth.password) {
625 cert_auth.protocol = xstrdup("cert");
626 cert_auth.host = xstrdup("");
627 cert_auth.username = xstrdup("");
628 cert_auth.path = xstrdup(ssl_cert);
629 credential_fill(&cert_auth);
630 }
631 return 1;
632 }
633
634 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
635 static int has_proxy_cert_password(void)
636 {
637 if (http_proxy_ssl_cert == NULL || proxy_ssl_cert_password_required != 1)
638 return 0;
639 if (!proxy_cert_auth.password) {
640 proxy_cert_auth.protocol = xstrdup("cert");
641 proxy_cert_auth.host = xstrdup("");
642 proxy_cert_auth.username = xstrdup("");
643 proxy_cert_auth.path = xstrdup(http_proxy_ssl_cert);
644 credential_fill(&proxy_cert_auth);
645 }
646 return 1;
647 }
648 #endif
649
650 #ifdef GITCURL_HAVE_CURLOPT_TCP_KEEPALIVE
651 static void set_curl_keepalive(CURL *c)
652 {
653 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
654 }
655
656 #else
657 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
658 {
659 int ka = 1;
660 int rc;
661 socklen_t len = (socklen_t)sizeof(ka);
662
663 if (type != CURLSOCKTYPE_IPCXN)
664 return 0;
665
666 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
667 if (rc < 0)
668 warning_errno("unable to set SO_KEEPALIVE on socket");
669
670 return CURL_SOCKOPT_OK;
671 }
672
673 static void set_curl_keepalive(CURL *c)
674 {
675 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
676 }
677 #endif
678
679 /* Return 1 if redactions have been made, 0 otherwise. */
680 static int redact_sensitive_header(struct strbuf *header, size_t offset)
681 {
682 int ret = 0;
683 const char *sensitive_header;
684
685 if (trace_curl_redact &&
686 (skip_iprefix(header->buf + offset, "Authorization:", &sensitive_header) ||
687 skip_iprefix(header->buf + offset, "Proxy-Authorization:", &sensitive_header))) {
688 /* The first token is the type, which is OK to log */
689 while (isspace(*sensitive_header))
690 sensitive_header++;
691 while (*sensitive_header && !isspace(*sensitive_header))
692 sensitive_header++;
693 /* Everything else is opaque and possibly sensitive */
694 strbuf_setlen(header, sensitive_header - header->buf);
695 strbuf_addstr(header, " <redacted>");
696 ret = 1;
697 } else if (trace_curl_redact &&
698 skip_iprefix(header->buf + offset, "Cookie:", &sensitive_header)) {
699 struct strbuf redacted_header = STRBUF_INIT;
700 const char *cookie;
701
702 while (isspace(*sensitive_header))
703 sensitive_header++;
704
705 cookie = sensitive_header;
706
707 while (cookie) {
708 char *equals;
709 char *semicolon = strstr(cookie, "; ");
710 if (semicolon)
711 *semicolon = 0;
712 equals = strchrnul(cookie, '=');
713 if (!equals) {
714 /* invalid cookie, just append and continue */
715 strbuf_addstr(&redacted_header, cookie);
716 continue;
717 }
718 strbuf_add(&redacted_header, cookie, equals - cookie);
719 strbuf_addstr(&redacted_header, "=<redacted>");
720 if (semicolon) {
721 /*
722 * There are more cookies. (Or, for some
723 * reason, the input string ends in "; ".)
724 */
725 strbuf_addstr(&redacted_header, "; ");
726 cookie = semicolon + strlen("; ");
727 } else {
728 cookie = NULL;
729 }
730 }
731
732 strbuf_setlen(header, sensitive_header - header->buf);
733 strbuf_addbuf(header, &redacted_header);
734 ret = 1;
735 }
736 return ret;
737 }
738
739 /* Redact headers in info */
740 static void redact_sensitive_info_header(struct strbuf *header)
741 {
742 const char *sensitive_header;
743
744 /*
745 * curl's h2h3 prints headers in info, e.g.:
746 * h2h3 [<header-name>: <header-val>]
747 */
748 if (trace_curl_redact &&
749 skip_iprefix(header->buf, "h2h3 [", &sensitive_header)) {
750 if (redact_sensitive_header(header, sensitive_header - header->buf)) {
751 /* redaction ate our closing bracket */
752 strbuf_addch(header, ']');
753 }
754 }
755 }
756
757 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
758 {
759 struct strbuf out = STRBUF_INIT;
760 struct strbuf **headers, **header;
761
762 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
763 text, (long)size, (long)size);
764 trace_strbuf(&trace_curl, &out);
765 strbuf_reset(&out);
766 strbuf_add(&out, ptr, size);
767 headers = strbuf_split_max(&out, '\n', 0);
768
769 for (header = headers; *header; header++) {
770 if (hide_sensitive_header)
771 redact_sensitive_header(*header, 0);
772 strbuf_insertstr((*header), 0, text);
773 strbuf_insertstr((*header), strlen(text), ": ");
774 strbuf_rtrim((*header));
775 strbuf_addch((*header), '\n');
776 trace_strbuf(&trace_curl, (*header));
777 }
778 strbuf_list_free(headers);
779 strbuf_release(&out);
780 }
781
782 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
783 {
784 size_t i;
785 struct strbuf out = STRBUF_INIT;
786 unsigned int width = 60;
787
788 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
789 text, (long)size, (long)size);
790 trace_strbuf(&trace_curl, &out);
791
792 for (i = 0; i < size; i += width) {
793 size_t w;
794
795 strbuf_reset(&out);
796 strbuf_addf(&out, "%s: ", text);
797 for (w = 0; (w < width) && (i + w < size); w++) {
798 unsigned char ch = ptr[i + w];
799
800 strbuf_addch(&out,
801 (ch >= 0x20) && (ch < 0x80)
802 ? ch : '.');
803 }
804 strbuf_addch(&out, '\n');
805 trace_strbuf(&trace_curl, &out);
806 }
807 strbuf_release(&out);
808 }
809
810 static void curl_dump_info(char *data, size_t size)
811 {
812 struct strbuf buf = STRBUF_INIT;
813
814 strbuf_add(&buf, data, size);
815
816 redact_sensitive_info_header(&buf);
817 trace_printf_key(&trace_curl, "== Info: %s", buf.buf);
818
819 strbuf_release(&buf);
820 }
821
822 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
823 {
824 const char *text;
825 enum { NO_FILTER = 0, DO_FILTER = 1 };
826
827 switch (type) {
828 case CURLINFO_TEXT:
829 curl_dump_info(data, size);
830 break;
831 case CURLINFO_HEADER_OUT:
832 text = "=> Send header";
833 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
834 break;
835 case CURLINFO_DATA_OUT:
836 if (trace_curl_data) {
837 text = "=> Send data";
838 curl_dump_data(text, (unsigned char *)data, size);
839 }
840 break;
841 case CURLINFO_SSL_DATA_OUT:
842 if (trace_curl_data) {
843 text = "=> Send SSL data";
844 curl_dump_data(text, (unsigned char *)data, size);
845 }
846 break;
847 case CURLINFO_HEADER_IN:
848 text = "<= Recv header";
849 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
850 break;
851 case CURLINFO_DATA_IN:
852 if (trace_curl_data) {
853 text = "<= Recv data";
854 curl_dump_data(text, (unsigned char *)data, size);
855 }
856 break;
857 case CURLINFO_SSL_DATA_IN:
858 if (trace_curl_data) {
859 text = "<= Recv SSL data";
860 curl_dump_data(text, (unsigned char *)data, size);
861 }
862 break;
863
864 default: /* we ignore unknown types by default */
865 return 0;
866 }
867 return 0;
868 }
869
870 void http_trace_curl_no_data(void)
871 {
872 trace_override_envvar(&trace_curl, "1");
873 trace_curl_data = 0;
874 }
875
876 void setup_curl_trace(CURL *handle)
877 {
878 if (!trace_want(&trace_curl))
879 return;
880 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
881 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
882 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
883 }
884
885 static void proto_list_append(struct strbuf *list, const char *proto)
886 {
887 if (!list)
888 return;
889 if (list->len)
890 strbuf_addch(list, ',');
891 strbuf_addstr(list, proto);
892 }
893
894 static long get_curl_allowed_protocols(int from_user, struct strbuf *list)
895 {
896 long bits = 0;
897
898 if (is_transport_allowed("http", from_user)) {
899 bits |= CURLPROTO_HTTP;
900 proto_list_append(list, "http");
901 }
902 if (is_transport_allowed("https", from_user)) {
903 bits |= CURLPROTO_HTTPS;
904 proto_list_append(list, "https");
905 }
906 if (is_transport_allowed("ftp", from_user)) {
907 bits |= CURLPROTO_FTP;
908 proto_list_append(list, "ftp");
909 }
910 if (is_transport_allowed("ftps", from_user)) {
911 bits |= CURLPROTO_FTPS;
912 proto_list_append(list, "ftps");
913 }
914
915 return bits;
916 }
917
918 #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
919 static int get_curl_http_version_opt(const char *version_string, long *opt)
920 {
921 int i;
922 static struct {
923 const char *name;
924 long opt_token;
925 } choice[] = {
926 { "HTTP/1.1", CURL_HTTP_VERSION_1_1 },
927 { "HTTP/2", CURL_HTTP_VERSION_2 }
928 };
929
930 for (i = 0; i < ARRAY_SIZE(choice); i++) {
931 if (!strcmp(version_string, choice[i].name)) {
932 *opt = choice[i].opt_token;
933 return 0;
934 }
935 }
936
937 warning("unknown value given to http.version: '%s'", version_string);
938 return -1; /* not found */
939 }
940
941 #endif
942
943 static CURL *get_curl_handle(void)
944 {
945 CURL *result = curl_easy_init();
946
947 if (!result)
948 die("curl_easy_init failed");
949
950 if (!curl_ssl_verify) {
951 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
952 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
953 } else {
954 /* Verify authenticity of the peer's certificate */
955 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
956 /* The name in the cert must match whom we tried to connect */
957 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
958 }
959
960 #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
961 if (curl_http_version) {
962 long opt;
963 if (!get_curl_http_version_opt(curl_http_version, &opt)) {
964 /* Set request use http version */
965 curl_easy_setopt(result, CURLOPT_HTTP_VERSION, opt);
966 }
967 }
968 #endif
969
970 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
971 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
972
973 #ifdef CURLGSSAPI_DELEGATION_FLAG
974 if (curl_deleg) {
975 int i;
976 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
977 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
978 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
979 curl_deleg_levels[i].curl_deleg_param);
980 break;
981 }
982 }
983 if (i == ARRAY_SIZE(curl_deleg_levels))
984 warning("Unknown delegation method '%s': using default",
985 curl_deleg);
986 }
987 #endif
988
989 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
990 !http_schannel_check_revoke) {
991 #ifdef GIT_CURL_HAVE_CURLSSLOPT_NO_REVOKE
992 curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
993 #else
994 warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0"));
995 #endif
996 }
997
998 if (http_proactive_auth)
999 init_curl_http_auth(result);
1000
1001 if (getenv("GIT_SSL_VERSION"))
1002 ssl_version = getenv("GIT_SSL_VERSION");
1003 if (ssl_version && *ssl_version) {
1004 int i;
1005 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
1006 if (!strcmp(ssl_version, sslversions[i].name)) {
1007 curl_easy_setopt(result, CURLOPT_SSLVERSION,
1008 sslversions[i].ssl_version);
1009 break;
1010 }
1011 }
1012 if (i == ARRAY_SIZE(sslversions))
1013 warning("unsupported ssl version %s: using default",
1014 ssl_version);
1015 }
1016
1017 if (getenv("GIT_SSL_CIPHER_LIST"))
1018 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
1019 if (ssl_cipherlist != NULL && *ssl_cipherlist)
1020 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
1021 ssl_cipherlist);
1022
1023 if (ssl_cert)
1024 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
1025 if (ssl_cert_type)
1026 curl_easy_setopt(result, CURLOPT_SSLCERTTYPE, ssl_cert_type);
1027 if (has_cert_password())
1028 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
1029 if (ssl_key)
1030 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
1031 if (ssl_key_type)
1032 curl_easy_setopt(result, CURLOPT_SSLKEYTYPE, ssl_key_type);
1033 if (ssl_capath)
1034 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
1035 #ifdef GIT_CURL_HAVE_CURLOPT_PINNEDPUBLICKEY
1036 if (ssl_pinnedkey)
1037 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
1038 #endif
1039 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
1040 !http_schannel_use_ssl_cainfo) {
1041 curl_easy_setopt(result, CURLOPT_CAINFO, NULL);
1042 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
1043 curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL);
1044 #endif
1045 } else if (ssl_cainfo != NULL || http_proxy_ssl_ca_info != NULL) {
1046 if (ssl_cainfo)
1047 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
1048 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_CAINFO
1049 if (http_proxy_ssl_ca_info)
1050 curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, http_proxy_ssl_ca_info);
1051 #endif
1052 }
1053
1054 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
1055 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
1056 curl_low_speed_limit);
1057 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
1058 curl_low_speed_time);
1059 }
1060
1061 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
1062 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
1063
1064 #ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
1065 {
1066 struct strbuf buf = STRBUF_INIT;
1067
1068 get_curl_allowed_protocols(0, &buf);
1069 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS_STR, buf.buf);
1070 strbuf_reset(&buf);
1071
1072 get_curl_allowed_protocols(-1, &buf);
1073 curl_easy_setopt(result, CURLOPT_PROTOCOLS_STR, buf.buf);
1074 strbuf_release(&buf);
1075 }
1076 #else
1077 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
1078 get_curl_allowed_protocols(0, NULL));
1079 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
1080 get_curl_allowed_protocols(-1, NULL));
1081 #endif
1082
1083 if (getenv("GIT_CURL_VERBOSE"))
1084 http_trace_curl_no_data();
1085 setup_curl_trace(result);
1086 if (getenv("GIT_TRACE_CURL_NO_DATA"))
1087 trace_curl_data = 0;
1088 if (!git_env_bool("GIT_TRACE_REDACT", 1))
1089 trace_curl_redact = 0;
1090
1091 curl_easy_setopt(result, CURLOPT_USERAGENT,
1092 user_agent ? user_agent : git_user_agent());
1093
1094 if (curl_ftp_no_epsv)
1095 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
1096
1097 if (curl_ssl_try)
1098 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
1099
1100 /*
1101 * CURL also examines these variables as a fallback; but we need to query
1102 * them here in order to decide whether to prompt for missing password (cf.
1103 * init_curl_proxy_auth()).
1104 *
1105 * Unlike many other common environment variables, these are historically
1106 * lowercase only. It appears that CURL did not know this and implemented
1107 * only uppercase variants, which was later corrected to take both - with
1108 * the exception of http_proxy, which is lowercase only also in CURL. As
1109 * the lowercase versions are the historical quasi-standard, they take
1110 * precedence here, as in CURL.
1111 */
1112 if (!curl_http_proxy) {
1113 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
1114 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
1115 var_override(&curl_http_proxy, getenv("https_proxy"));
1116 } else {
1117 var_override(&curl_http_proxy, getenv("http_proxy"));
1118 }
1119 if (!curl_http_proxy) {
1120 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
1121 var_override(&curl_http_proxy, getenv("all_proxy"));
1122 }
1123 }
1124
1125 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
1126 /*
1127 * Handle case with the empty http.proxy value here to keep
1128 * common code clean.
1129 * NB: empty option disables proxying at all.
1130 */
1131 curl_easy_setopt(result, CURLOPT_PROXY, "");
1132 } else if (curl_http_proxy) {
1133 if (starts_with(curl_http_proxy, "socks5h"))
1134 curl_easy_setopt(result,
1135 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
1136 else if (starts_with(curl_http_proxy, "socks5"))
1137 curl_easy_setopt(result,
1138 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
1139 else if (starts_with(curl_http_proxy, "socks4a"))
1140 curl_easy_setopt(result,
1141 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
1142 else if (starts_with(curl_http_proxy, "socks"))
1143 curl_easy_setopt(result,
1144 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
1145 #ifdef GIT_CURL_HAVE_CURLOPT_PROXY_KEYPASSWD
1146 else if (starts_with(curl_http_proxy, "https")) {
1147 curl_easy_setopt(result, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
1148
1149 if (http_proxy_ssl_cert)
1150 curl_easy_setopt(result, CURLOPT_PROXY_SSLCERT, http_proxy_ssl_cert);
1151
1152 if (http_proxy_ssl_key)
1153 curl_easy_setopt(result, CURLOPT_PROXY_SSLKEY, http_proxy_ssl_key);
1154
1155 if (has_proxy_cert_password())
1156 curl_easy_setopt(result, CURLOPT_PROXY_KEYPASSWD, proxy_cert_auth.password);
1157 }
1158 #endif
1159 if (strstr(curl_http_proxy, "://"))
1160 credential_from_url(&proxy_auth, curl_http_proxy);
1161 else {
1162 struct strbuf url = STRBUF_INIT;
1163 strbuf_addf(&url, "http://%s", curl_http_proxy);
1164 credential_from_url(&proxy_auth, url.buf);
1165 strbuf_release(&url);
1166 }
1167
1168 if (!proxy_auth.host)
1169 die("Invalid proxy URL '%s'", curl_http_proxy);
1170
1171 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
1172 var_override(&curl_no_proxy, getenv("NO_PROXY"));
1173 var_override(&curl_no_proxy, getenv("no_proxy"));
1174 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
1175 }
1176 init_curl_proxy_auth(result);
1177
1178 set_curl_keepalive(result);
1179
1180 return result;
1181 }
1182
1183 static void set_from_env(const char **var, const char *envname)
1184 {
1185 const char *val = getenv(envname);
1186 if (val)
1187 *var = val;
1188 }
1189
1190 void http_init(struct remote *remote, const char *url, int proactive_auth)
1191 {
1192 char *low_speed_limit;
1193 char *low_speed_time;
1194 char *normalized_url;
1195 struct urlmatch_config config = URLMATCH_CONFIG_INIT;
1196
1197 config.section = "http";
1198 config.key = NULL;
1199 config.collect_fn = http_options;
1200 config.cascade_fn = git_default_config;
1201 config.cb = NULL;
1202
1203 http_is_verbose = 0;
1204 normalized_url = url_normalize(url, &config.url);
1205
1206 git_config(urlmatch_config_entry, &config);
1207 free(normalized_url);
1208 string_list_clear(&config.vars, 1);
1209
1210 #ifdef GIT_CURL_HAVE_CURLSSLSET_NO_BACKENDS
1211 if (http_ssl_backend) {
1212 const curl_ssl_backend **backends;
1213 struct strbuf buf = STRBUF_INIT;
1214 int i;
1215
1216 switch (curl_global_sslset(-1, http_ssl_backend, &backends)) {
1217 case CURLSSLSET_UNKNOWN_BACKEND:
1218 strbuf_addf(&buf, _("Unsupported SSL backend '%s'. "
1219 "Supported SSL backends:"),
1220 http_ssl_backend);
1221 for (i = 0; backends[i]; i++)
1222 strbuf_addf(&buf, "\n\t%s", backends[i]->name);
1223 die("%s", buf.buf);
1224 case CURLSSLSET_NO_BACKENDS:
1225 die(_("Could not set SSL backend to '%s': "
1226 "cURL was built without SSL backends"),
1227 http_ssl_backend);
1228 case CURLSSLSET_TOO_LATE:
1229 die(_("Could not set SSL backend to '%s': already set"),
1230 http_ssl_backend);
1231 case CURLSSLSET_OK:
1232 break; /* Okay! */
1233 }
1234 }
1235 #endif
1236
1237 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1238 die("curl_global_init failed");
1239
1240 http_proactive_auth = proactive_auth;
1241
1242 if (remote && remote->http_proxy)
1243 curl_http_proxy = xstrdup(remote->http_proxy);
1244
1245 if (remote)
1246 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1247
1248 pragma_header = curl_slist_append(http_copy_default_headers(),
1249 "Pragma: no-cache");
1250 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1251 "Pragma:");
1252
1253 {
1254 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1255 if (http_max_requests)
1256 max_requests = atoi(http_max_requests);
1257 }
1258
1259 curlm = curl_multi_init();
1260 if (!curlm)
1261 die("curl_multi_init failed");
1262
1263 if (getenv("GIT_SSL_NO_VERIFY"))
1264 curl_ssl_verify = 0;
1265
1266 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1267 set_from_env(&ssl_cert_type, "GIT_SSL_CERT_TYPE");
1268 set_from_env(&ssl_key, "GIT_SSL_KEY");
1269 set_from_env(&ssl_key_type, "GIT_SSL_KEY_TYPE");
1270 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1271 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1272
1273 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1274
1275 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1276 if (low_speed_limit)
1277 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1278 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1279 if (low_speed_time)
1280 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1281
1282 if (curl_ssl_verify == -1)
1283 curl_ssl_verify = 1;
1284
1285 curl_session_count = 0;
1286 if (max_requests < 1)
1287 max_requests = DEFAULT_MAX_REQUESTS;
1288
1289 set_from_env(&http_proxy_ssl_cert, "GIT_PROXY_SSL_CERT");
1290 set_from_env(&http_proxy_ssl_key, "GIT_PROXY_SSL_KEY");
1291 set_from_env(&http_proxy_ssl_ca_info, "GIT_PROXY_SSL_CAINFO");
1292
1293 if (getenv("GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED"))
1294 proxy_ssl_cert_password_required = 1;
1295
1296 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1297 curl_ftp_no_epsv = 1;
1298
1299 if (url) {
1300 credential_from_url(&http_auth, url);
1301 if (!ssl_cert_password_required &&
1302 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1303 starts_with(url, "https://"))
1304 ssl_cert_password_required = 1;
1305 }
1306
1307 curl_default = get_curl_handle();
1308 }
1309
1310 void http_cleanup(void)
1311 {
1312 struct active_request_slot *slot = active_queue_head;
1313
1314 while (slot != NULL) {
1315 struct active_request_slot *next = slot->next;
1316 if (slot->curl) {
1317 xmulti_remove_handle(slot);
1318 curl_easy_cleanup(slot->curl);
1319 }
1320 free(slot);
1321 slot = next;
1322 }
1323 active_queue_head = NULL;
1324
1325 curl_easy_cleanup(curl_default);
1326
1327 curl_multi_cleanup(curlm);
1328 curl_global_cleanup();
1329
1330 string_list_clear(&extra_http_headers, 0);
1331
1332 curl_slist_free_all(pragma_header);
1333 pragma_header = NULL;
1334
1335 curl_slist_free_all(no_pragma_header);
1336 no_pragma_header = NULL;
1337
1338 curl_slist_free_all(host_resolutions);
1339 host_resolutions = NULL;
1340
1341 if (curl_http_proxy) {
1342 free((void *)curl_http_proxy);
1343 curl_http_proxy = NULL;
1344 }
1345
1346 if (proxy_auth.password) {
1347 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1348 FREE_AND_NULL(proxy_auth.password);
1349 }
1350
1351 free((void *)curl_proxyuserpwd);
1352 curl_proxyuserpwd = NULL;
1353
1354 free((void *)http_proxy_authmethod);
1355 http_proxy_authmethod = NULL;
1356
1357 if (cert_auth.password) {
1358 memset(cert_auth.password, 0, strlen(cert_auth.password));
1359 FREE_AND_NULL(cert_auth.password);
1360 }
1361 ssl_cert_password_required = 0;
1362
1363 if (proxy_cert_auth.password) {
1364 memset(proxy_cert_auth.password, 0, strlen(proxy_cert_auth.password));
1365 FREE_AND_NULL(proxy_cert_auth.password);
1366 }
1367 proxy_ssl_cert_password_required = 0;
1368
1369 FREE_AND_NULL(cached_accept_language);
1370 }
1371
1372 struct active_request_slot *get_active_slot(void)
1373 {
1374 struct active_request_slot *slot = active_queue_head;
1375 struct active_request_slot *newslot;
1376
1377 int num_transfers;
1378
1379 /* Wait for a slot to open up if the queue is full */
1380 while (active_requests >= max_requests) {
1381 curl_multi_perform(curlm, &num_transfers);
1382 if (num_transfers < active_requests)
1383 process_curl_messages();
1384 }
1385
1386 while (slot != NULL && slot->in_use)
1387 slot = slot->next;
1388
1389 if (!slot) {
1390 newslot = xmalloc(sizeof(*newslot));
1391 newslot->curl = NULL;
1392 newslot->in_use = 0;
1393 newslot->next = NULL;
1394
1395 slot = active_queue_head;
1396 if (!slot) {
1397 active_queue_head = newslot;
1398 } else {
1399 while (slot->next != NULL)
1400 slot = slot->next;
1401 slot->next = newslot;
1402 }
1403 slot = newslot;
1404 }
1405
1406 if (!slot->curl) {
1407 slot->curl = curl_easy_duphandle(curl_default);
1408 curl_session_count++;
1409 }
1410
1411 active_requests++;
1412 slot->in_use = 1;
1413 slot->results = NULL;
1414 slot->finished = NULL;
1415 slot->callback_data = NULL;
1416 slot->callback_func = NULL;
1417 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1418 if (curl_save_cookies)
1419 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1420 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1421 curl_easy_setopt(slot->curl, CURLOPT_RESOLVE, host_resolutions);
1422 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1423 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1424 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1425 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1426 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1427 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1428 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1429 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1430 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1431
1432 /*
1433 * Default following to off unless "ALWAYS" is configured; this gives
1434 * callers a sane starting point, and they can tweak for individual
1435 * HTTP_FOLLOW_* cases themselves.
1436 */
1437 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1438 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1439 else
1440 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1441
1442 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1443 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1444 if (http_auth.password || curl_empty_auth_enabled())
1445 init_curl_http_auth(slot->curl);
1446
1447 return slot;
1448 }
1449
1450 int start_active_slot(struct active_request_slot *slot)
1451 {
1452 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1453 int num_transfers;
1454
1455 if (curlm_result != CURLM_OK &&
1456 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1457 warning("curl_multi_add_handle failed: %s",
1458 curl_multi_strerror(curlm_result));
1459 active_requests--;
1460 slot->in_use = 0;
1461 return 0;
1462 }
1463
1464 /*
1465 * We know there must be something to do, since we just added
1466 * something.
1467 */
1468 curl_multi_perform(curlm, &num_transfers);
1469 return 1;
1470 }
1471
1472 struct fill_chain {
1473 void *data;
1474 int (*fill)(void *);
1475 struct fill_chain *next;
1476 };
1477
1478 static struct fill_chain *fill_cfg;
1479
1480 void add_fill_function(void *data, int (*fill)(void *))
1481 {
1482 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1483 struct fill_chain **linkp = &fill_cfg;
1484 new_fill->data = data;
1485 new_fill->fill = fill;
1486 new_fill->next = NULL;
1487 while (*linkp)
1488 linkp = &(*linkp)->next;
1489 *linkp = new_fill;
1490 }
1491
1492 void fill_active_slots(void)
1493 {
1494 struct active_request_slot *slot = active_queue_head;
1495
1496 while (active_requests < max_requests) {
1497 struct fill_chain *fill;
1498 for (fill = fill_cfg; fill; fill = fill->next)
1499 if (fill->fill(fill->data))
1500 break;
1501
1502 if (!fill)
1503 break;
1504 }
1505
1506 while (slot != NULL) {
1507 if (!slot->in_use && slot->curl != NULL
1508 && curl_session_count > min_curl_sessions) {
1509 curl_easy_cleanup(slot->curl);
1510 slot->curl = NULL;
1511 curl_session_count--;
1512 }
1513 slot = slot->next;
1514 }
1515 }
1516
1517 void step_active_slots(void)
1518 {
1519 int num_transfers;
1520 CURLMcode curlm_result;
1521
1522 do {
1523 curlm_result = curl_multi_perform(curlm, &num_transfers);
1524 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1525 if (num_transfers < active_requests) {
1526 process_curl_messages();
1527 fill_active_slots();
1528 }
1529 }
1530
1531 void run_active_slot(struct active_request_slot *slot)
1532 {
1533 fd_set readfds;
1534 fd_set writefds;
1535 fd_set excfds;
1536 int max_fd;
1537 struct timeval select_timeout;
1538 int finished = 0;
1539
1540 slot->finished = &finished;
1541 while (!finished) {
1542 step_active_slots();
1543
1544 if (slot->in_use) {
1545 long curl_timeout;
1546 curl_multi_timeout(curlm, &curl_timeout);
1547 if (curl_timeout == 0) {
1548 continue;
1549 } else if (curl_timeout == -1) {
1550 select_timeout.tv_sec = 0;
1551 select_timeout.tv_usec = 50000;
1552 } else {
1553 select_timeout.tv_sec = curl_timeout / 1000;
1554 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1555 }
1556
1557 max_fd = -1;
1558 FD_ZERO(&readfds);
1559 FD_ZERO(&writefds);
1560 FD_ZERO(&excfds);
1561 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1562
1563 /*
1564 * It can happen that curl_multi_timeout returns a pathologically
1565 * long timeout when curl_multi_fdset returns no file descriptors
1566 * to read. See commit message for more details.
1567 */
1568 if (max_fd < 0 &&
1569 (select_timeout.tv_sec > 0 ||
1570 select_timeout.tv_usec > 50000)) {
1571 select_timeout.tv_sec = 0;
1572 select_timeout.tv_usec = 50000;
1573 }
1574
1575 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1576 }
1577 }
1578
1579 /*
1580 * The value of slot->finished we set before the loop was used
1581 * to set our "finished" variable when our request completed.
1582 *
1583 * 1. The slot may not have been reused for another requst
1584 * yet, in which case it still has &finished.
1585 *
1586 * 2. The slot may already be in-use to serve another request,
1587 * which can further be divided into two cases:
1588 *
1589 * (a) If call run_active_slot() hasn't been called for that
1590 * other request, slot->finished would have been cleared
1591 * by get_active_slot() and has NULL.
1592 *
1593 * (b) If the request did call run_active_slot(), then the
1594 * call would have updated slot->finished at the beginning
1595 * of this function, and with the clearing of the member
1596 * below, we would find that slot->finished is now NULL.
1597 *
1598 * In all cases, slot->finished has no useful information to
1599 * anybody at this point. Some compilers warn us for
1600 * attempting to smuggle a pointer that is about to become
1601 * invalid, i.e. &finished. We clear it here to assure them.
1602 */
1603 slot->finished = NULL;
1604 }
1605
1606 static void release_active_slot(struct active_request_slot *slot)
1607 {
1608 closedown_active_slot(slot);
1609 if (slot->curl) {
1610 xmulti_remove_handle(slot);
1611 if (curl_session_count > min_curl_sessions) {
1612 curl_easy_cleanup(slot->curl);
1613 slot->curl = NULL;
1614 curl_session_count--;
1615 }
1616 }
1617 fill_active_slots();
1618 }
1619
1620 void finish_all_active_slots(void)
1621 {
1622 struct active_request_slot *slot = active_queue_head;
1623
1624 while (slot != NULL)
1625 if (slot->in_use) {
1626 run_active_slot(slot);
1627 slot = active_queue_head;
1628 } else {
1629 slot = slot->next;
1630 }
1631 }
1632
1633 /* Helpers for modifying and creating URLs */
1634 static inline int needs_quote(int ch)
1635 {
1636 if (((ch >= 'A') && (ch <= 'Z'))
1637 || ((ch >= 'a') && (ch <= 'z'))
1638 || ((ch >= '0') && (ch <= '9'))
1639 || (ch == '/')
1640 || (ch == '-')
1641 || (ch == '.'))
1642 return 0;
1643 return 1;
1644 }
1645
1646 static char *quote_ref_url(const char *base, const char *ref)
1647 {
1648 struct strbuf buf = STRBUF_INIT;
1649 const char *cp;
1650 int ch;
1651
1652 end_url_with_slash(&buf, base);
1653
1654 for (cp = ref; (ch = *cp) != 0; cp++)
1655 if (needs_quote(ch))
1656 strbuf_addf(&buf, "%%%02x", ch);
1657 else
1658 strbuf_addch(&buf, *cp);
1659
1660 return strbuf_detach(&buf, NULL);
1661 }
1662
1663 void append_remote_object_url(struct strbuf *buf, const char *url,
1664 const char *hex,
1665 int only_two_digit_prefix)
1666 {
1667 end_url_with_slash(buf, url);
1668
1669 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1670 if (!only_two_digit_prefix)
1671 strbuf_addstr(buf, hex + 2);
1672 }
1673
1674 char *get_remote_object_url(const char *url, const char *hex,
1675 int only_two_digit_prefix)
1676 {
1677 struct strbuf buf = STRBUF_INIT;
1678 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1679 return strbuf_detach(&buf, NULL);
1680 }
1681
1682 void normalize_curl_result(CURLcode *result, long http_code,
1683 char *errorstr, size_t errorlen)
1684 {
1685 /*
1686 * If we see a failing http code with CURLE_OK, we have turned off
1687 * FAILONERROR (to keep the server's custom error response), and should
1688 * translate the code into failure here.
1689 *
1690 * Likewise, if we see a redirect (30x code), that means we turned off
1691 * redirect-following, and we should treat the result as an error.
1692 */
1693 if (*result == CURLE_OK && http_code >= 300) {
1694 *result = CURLE_HTTP_RETURNED_ERROR;
1695 /*
1696 * Normally curl will already have put the "reason phrase"
1697 * from the server into curl_errorstr; unfortunately without
1698 * FAILONERROR it is lost, so we can give only the numeric
1699 * status code.
1700 */
1701 xsnprintf(errorstr, errorlen,
1702 "The requested URL returned error: %ld",
1703 http_code);
1704 }
1705 }
1706
1707 static int handle_curl_result(struct slot_results *results)
1708 {
1709 normalize_curl_result(&results->curl_result, results->http_code,
1710 curl_errorstr, sizeof(curl_errorstr));
1711
1712 if (results->curl_result == CURLE_OK) {
1713 credential_approve(&http_auth);
1714 credential_approve(&proxy_auth);
1715 credential_approve(&cert_auth);
1716 return HTTP_OK;
1717 } else if (results->curl_result == CURLE_SSL_CERTPROBLEM) {
1718 /*
1719 * We can't tell from here whether it's a bad path, bad
1720 * certificate, bad password, or something else wrong
1721 * with the certificate. So we reject the credential to
1722 * avoid caching or saving a bad password.
1723 */
1724 credential_reject(&cert_auth);
1725 return HTTP_NOAUTH;
1726 #ifdef GIT_CURL_HAVE_CURLE_SSL_PINNEDPUBKEYNOTMATCH
1727 } else if (results->curl_result == CURLE_SSL_PINNEDPUBKEYNOTMATCH) {
1728 return HTTP_NOMATCHPUBLICKEY;
1729 #endif
1730 } else if (missing_target(results))
1731 return HTTP_MISSING_TARGET;
1732 else if (results->http_code == 401) {
1733 if (http_auth.username && http_auth.password) {
1734 credential_reject(&http_auth);
1735 return HTTP_NOAUTH;
1736 } else {
1737 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1738 if (results->auth_avail) {
1739 http_auth_methods &= results->auth_avail;
1740 http_auth_methods_restricted = 1;
1741 }
1742 return HTTP_REAUTH;
1743 }
1744 } else {
1745 if (results->http_connectcode == 407)
1746 credential_reject(&proxy_auth);
1747 if (!curl_errorstr[0])
1748 strlcpy(curl_errorstr,
1749 curl_easy_strerror(results->curl_result),
1750 sizeof(curl_errorstr));
1751 return HTTP_ERROR;
1752 }
1753 }
1754
1755 int run_one_slot(struct active_request_slot *slot,
1756 struct slot_results *results)
1757 {
1758 slot->results = results;
1759 if (!start_active_slot(slot)) {
1760 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1761 "failed to start HTTP request");
1762 return HTTP_START_FAILED;
1763 }
1764
1765 run_active_slot(slot);
1766 return handle_curl_result(results);
1767 }
1768
1769 struct curl_slist *http_copy_default_headers(void)
1770 {
1771 struct curl_slist *headers = NULL;
1772 const struct string_list_item *item;
1773
1774 for_each_string_list_item(item, &extra_http_headers)
1775 headers = curl_slist_append(headers, item->string);
1776
1777 return headers;
1778 }
1779
1780 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1781 {
1782 char *ptr;
1783 CURLcode ret;
1784
1785 strbuf_reset(buf);
1786 ret = curl_easy_getinfo(curl, info, &ptr);
1787 if (!ret && ptr)
1788 strbuf_addstr(buf, ptr);
1789 return ret;
1790 }
1791
1792 /*
1793 * Check for and extract a content-type parameter. "raw"
1794 * should be positioned at the start of the potential
1795 * parameter, with any whitespace already removed.
1796 *
1797 * "name" is the name of the parameter. The value is appended
1798 * to "out".
1799 */
1800 static int extract_param(const char *raw, const char *name,
1801 struct strbuf *out)
1802 {
1803 size_t len = strlen(name);
1804
1805 if (strncasecmp(raw, name, len))
1806 return -1;
1807 raw += len;
1808
1809 if (*raw != '=')
1810 return -1;
1811 raw++;
1812
1813 while (*raw && !isspace(*raw) && *raw != ';')
1814 strbuf_addch(out, *raw++);
1815 return 0;
1816 }
1817
1818 /*
1819 * Extract a normalized version of the content type, with any
1820 * spaces suppressed, all letters lowercased, and no trailing ";"
1821 * or parameters.
1822 *
1823 * Note that we will silently remove even invalid whitespace. For
1824 * example, "text / plain" is specifically forbidden by RFC 2616,
1825 * but "text/plain" is the only reasonable output, and this keeps
1826 * our code simple.
1827 *
1828 * If the "charset" argument is not NULL, store the value of any
1829 * charset parameter there.
1830 *
1831 * Example:
1832 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1833 * "text / plain" -> "text/plain"
1834 */
1835 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1836 struct strbuf *charset)
1837 {
1838 const char *p;
1839
1840 strbuf_reset(type);
1841 strbuf_grow(type, raw->len);
1842 for (p = raw->buf; *p; p++) {
1843 if (isspace(*p))
1844 continue;
1845 if (*p == ';') {
1846 p++;
1847 break;
1848 }
1849 strbuf_addch(type, tolower(*p));
1850 }
1851
1852 if (!charset)
1853 return;
1854
1855 strbuf_reset(charset);
1856 while (*p) {
1857 while (isspace(*p) || *p == ';')
1858 p++;
1859 if (!extract_param(p, "charset", charset))
1860 return;
1861 while (*p && !isspace(*p))
1862 p++;
1863 }
1864
1865 if (!charset->len && starts_with(type->buf, "text/"))
1866 strbuf_addstr(charset, "ISO-8859-1");
1867 }
1868
1869 static void write_accept_language(struct strbuf *buf)
1870 {
1871 /*
1872 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1873 * that, q-value will be smaller than 0.001, the minimum q-value the
1874 * HTTP specification allows. See
1875 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1876 */
1877 const int MAX_DECIMAL_PLACES = 3;
1878 const int MAX_LANGUAGE_TAGS = 1000;
1879 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1880 char **language_tags = NULL;
1881 int num_langs = 0;
1882 const char *s = get_preferred_languages();
1883 int i;
1884 struct strbuf tag = STRBUF_INIT;
1885
1886 /* Don't add Accept-Language header if no language is preferred. */
1887 if (!s)
1888 return;
1889
1890 /*
1891 * Split the colon-separated string of preferred languages into
1892 * language_tags array.
1893 */
1894 do {
1895 /* collect language tag */
1896 for (; *s && (isalnum(*s) || *s == '_'); s++)
1897 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1898
1899 /* skip .codeset, @modifier and any other unnecessary parts */
1900 while (*s && *s != ':')
1901 s++;
1902
1903 if (tag.len) {
1904 num_langs++;
1905 REALLOC_ARRAY(language_tags, num_langs);
1906 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1907 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1908 break;
1909 }
1910 } while (*s++);
1911
1912 /* write Accept-Language header into buf */
1913 if (num_langs) {
1914 int last_buf_len = 0;
1915 int max_q;
1916 int decimal_places;
1917 char q_format[32];
1918
1919 /* add '*' */
1920 REALLOC_ARRAY(language_tags, num_langs + 1);
1921 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1922
1923 /* compute decimal_places */
1924 for (max_q = 1, decimal_places = 0;
1925 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1926 decimal_places++, max_q *= 10)
1927 ;
1928
1929 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1930
1931 strbuf_addstr(buf, "Accept-Language: ");
1932
1933 for (i = 0; i < num_langs; i++) {
1934 if (i > 0)
1935 strbuf_addstr(buf, ", ");
1936
1937 strbuf_addstr(buf, language_tags[i]);
1938
1939 if (i > 0)
1940 strbuf_addf(buf, q_format, max_q - i);
1941
1942 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1943 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1944 break;
1945 }
1946
1947 last_buf_len = buf->len;
1948 }
1949 }
1950
1951 /* free language tags -- last one is a static '*' */
1952 for (i = 0; i < num_langs - 1; i++)
1953 free(language_tags[i]);
1954 free(language_tags);
1955 }
1956
1957 /*
1958 * Get an Accept-Language header which indicates user's preferred languages.
1959 *
1960 * Examples:
1961 * LANGUAGE= -> ""
1962 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1963 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1964 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1965 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1966 * LANGUAGE= LANG=C -> ""
1967 */
1968 const char *http_get_accept_language_header(void)
1969 {
1970 if (!cached_accept_language) {
1971 struct strbuf buf = STRBUF_INIT;
1972 write_accept_language(&buf);
1973 if (buf.len > 0)
1974 cached_accept_language = strbuf_detach(&buf, NULL);
1975 }
1976
1977 return cached_accept_language;
1978 }
1979
1980 static void http_opt_request_remainder(CURL *curl, off_t pos)
1981 {
1982 char buf[128];
1983 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1984 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1985 }
1986
1987 /* http_request() targets */
1988 #define HTTP_REQUEST_STRBUF 0
1989 #define HTTP_REQUEST_FILE 1
1990
1991 static int http_request(const char *url,
1992 void *result, int target,
1993 const struct http_get_options *options)
1994 {
1995 struct active_request_slot *slot;
1996 struct slot_results results;
1997 struct curl_slist *headers = http_copy_default_headers();
1998 struct strbuf buf = STRBUF_INIT;
1999 const char *accept_language;
2000 int ret;
2001
2002 slot = get_active_slot();
2003 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2004
2005 if (!result) {
2006 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2007 } else {
2008 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
2009 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, result);
2010
2011 if (target == HTTP_REQUEST_FILE) {
2012 off_t posn = ftello(result);
2013 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
2014 fwrite);
2015 if (posn > 0)
2016 http_opt_request_remainder(slot->curl, posn);
2017 } else
2018 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
2019 fwrite_buffer);
2020 }
2021
2022 curl_easy_setopt(slot->curl, CURLOPT_HEADERFUNCTION, fwrite_wwwauth);
2023
2024 accept_language = http_get_accept_language_header();
2025
2026 if (accept_language)
2027 headers = curl_slist_append(headers, accept_language);
2028
2029 strbuf_addstr(&buf, "Pragma:");
2030 if (options && options->no_cache)
2031 strbuf_addstr(&buf, " no-cache");
2032 if (options && options->initial_request &&
2033 http_follow_config == HTTP_FOLLOW_INITIAL)
2034 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
2035
2036 headers = curl_slist_append(headers, buf.buf);
2037
2038 /* Add additional headers here */
2039 if (options && options->extra_headers) {
2040 const struct string_list_item *item;
2041 for_each_string_list_item(item, options->extra_headers) {
2042 headers = curl_slist_append(headers, item->string);
2043 }
2044 }
2045
2046 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2047 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
2048 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
2049 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
2050
2051 ret = run_one_slot(slot, &results);
2052
2053 if (options && options->content_type) {
2054 struct strbuf raw = STRBUF_INIT;
2055 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
2056 extract_content_type(&raw, options->content_type,
2057 options->charset);
2058 strbuf_release(&raw);
2059 }
2060
2061 if (options && options->effective_url)
2062 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
2063 options->effective_url);
2064
2065 curl_slist_free_all(headers);
2066 strbuf_release(&buf);
2067
2068 return ret;
2069 }
2070
2071 /*
2072 * Update the "base" url to a more appropriate value, as deduced by
2073 * redirects seen when requesting a URL starting with "url".
2074 *
2075 * The "asked" parameter is a URL that we asked curl to access, and must begin
2076 * with "base".
2077 *
2078 * The "got" parameter is the URL that curl reported to us as where we ended
2079 * up.
2080 *
2081 * Returns 1 if we updated the base url, 0 otherwise.
2082 *
2083 * Our basic strategy is to compare "base" and "asked" to find the bits
2084 * specific to our request. We then strip those bits off of "got" to yield the
2085 * new base. So for example, if our base is "http://example.com/foo.git",
2086 * and we ask for "http://example.com/foo.git/info/refs", we might end up
2087 * with "https://other.example.com/foo.git/info/refs". We would want the
2088 * new URL to become "https://other.example.com/foo.git".
2089 *
2090 * Note that this assumes a sane redirect scheme. It's entirely possible
2091 * in the example above to end up at a URL that does not even end in
2092 * "info/refs". In such a case we die. There's not much we can do, such a
2093 * scheme is unlikely to represent a real git repository, and failing to
2094 * rewrite the base opens options for malicious redirects to do funny things.
2095 */
2096 static int update_url_from_redirect(struct strbuf *base,
2097 const char *asked,
2098 const struct strbuf *got)
2099 {
2100 const char *tail;
2101 size_t new_len;
2102
2103 if (!strcmp(asked, got->buf))
2104 return 0;
2105
2106 if (!skip_prefix(asked, base->buf, &tail))
2107 BUG("update_url_from_redirect: %s is not a superset of %s",
2108 asked, base->buf);
2109
2110 new_len = got->len;
2111 if (!strip_suffix_mem(got->buf, &new_len, tail))
2112 die(_("unable to update url base from redirection:\n"
2113 " asked for: %s\n"
2114 " redirect: %s"),
2115 asked, got->buf);
2116
2117 strbuf_reset(base);
2118 strbuf_add(base, got->buf, new_len);
2119
2120 return 1;
2121 }
2122
2123 static int http_request_reauth(const char *url,
2124 void *result, int target,
2125 struct http_get_options *options)
2126 {
2127 int ret = http_request(url, result, target, options);
2128
2129 if (ret != HTTP_OK && ret != HTTP_REAUTH)
2130 return ret;
2131
2132 if (options && options->effective_url && options->base_url) {
2133 if (update_url_from_redirect(options->base_url,
2134 url, options->effective_url)) {
2135 credential_from_url(&http_auth, options->base_url->buf);
2136 url = options->effective_url->buf;
2137 }
2138 }
2139
2140 if (ret != HTTP_REAUTH)
2141 return ret;
2142
2143 /*
2144 * The previous request may have put cruft into our output stream; we
2145 * should clear it out before making our next request.
2146 */
2147 switch (target) {
2148 case HTTP_REQUEST_STRBUF:
2149 strbuf_reset(result);
2150 break;
2151 case HTTP_REQUEST_FILE:
2152 if (fflush(result)) {
2153 error_errno("unable to flush a file");
2154 return HTTP_START_FAILED;
2155 }
2156 rewind(result);
2157 if (ftruncate(fileno(result), 0) < 0) {
2158 error_errno("unable to truncate a file");
2159 return HTTP_START_FAILED;
2160 }
2161 break;
2162 default:
2163 BUG("Unknown http_request target");
2164 }
2165
2166 credential_fill(&http_auth);
2167
2168 return http_request(url, result, target, options);
2169 }
2170
2171 int http_get_strbuf(const char *url,
2172 struct strbuf *result,
2173 struct http_get_options *options)
2174 {
2175 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
2176 }
2177
2178 /*
2179 * Downloads a URL and stores the result in the given file.
2180 *
2181 * If a previous interrupted download is detected (i.e. a previous temporary
2182 * file is still around) the download is resumed.
2183 */
2184 int http_get_file(const char *url, const char *filename,
2185 struct http_get_options *options)
2186 {
2187 int ret;
2188 struct strbuf tmpfile = STRBUF_INIT;
2189 FILE *result;
2190
2191 strbuf_addf(&tmpfile, "%s.temp", filename);
2192 result = fopen(tmpfile.buf, "a");
2193 if (!result) {
2194 error("Unable to open local file %s", tmpfile.buf);
2195 ret = HTTP_ERROR;
2196 goto cleanup;
2197 }
2198
2199 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
2200 fclose(result);
2201
2202 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
2203 ret = HTTP_ERROR;
2204 cleanup:
2205 strbuf_release(&tmpfile);
2206 return ret;
2207 }
2208
2209 int http_fetch_ref(const char *base, struct ref *ref)
2210 {
2211 struct http_get_options options = {0};
2212 char *url;
2213 struct strbuf buffer = STRBUF_INIT;
2214 int ret = -1;
2215
2216 options.no_cache = 1;
2217
2218 url = quote_ref_url(base, ref->name);
2219 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
2220 strbuf_rtrim(&buffer);
2221 if (buffer.len == the_hash_algo->hexsz)
2222 ret = get_oid_hex(buffer.buf, &ref->old_oid);
2223 else if (starts_with(buffer.buf, "ref: ")) {
2224 ref->symref = xstrdup(buffer.buf + 5);
2225 ret = 0;
2226 }
2227 }
2228
2229 strbuf_release(&buffer);
2230 free(url);
2231 return ret;
2232 }
2233
2234 /* Helpers for fetching packs */
2235 static char *fetch_pack_index(unsigned char *hash, const char *base_url)
2236 {
2237 char *url, *tmp;
2238 struct strbuf buf = STRBUF_INIT;
2239
2240 if (http_is_verbose)
2241 fprintf(stderr, "Getting index for pack %s\n", hash_to_hex(hash));
2242
2243 end_url_with_slash(&buf, base_url);
2244 strbuf_addf(&buf, "objects/pack/pack-%s.idx", hash_to_hex(hash));
2245 url = strbuf_detach(&buf, NULL);
2246
2247 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(hash));
2248 tmp = strbuf_detach(&buf, NULL);
2249
2250 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
2251 error("Unable to get pack index %s", url);
2252 FREE_AND_NULL(tmp);
2253 }
2254
2255 free(url);
2256 return tmp;
2257 }
2258
2259 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
2260 unsigned char *sha1, const char *base_url)
2261 {
2262 struct packed_git *new_pack;
2263 char *tmp_idx = NULL;
2264 int ret;
2265
2266 if (has_pack_index(sha1)) {
2267 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2268 if (!new_pack)
2269 return -1; /* parse_pack_index() already issued error message */
2270 goto add_pack;
2271 }
2272
2273 tmp_idx = fetch_pack_index(sha1, base_url);
2274 if (!tmp_idx)
2275 return -1;
2276
2277 new_pack = parse_pack_index(sha1, tmp_idx);
2278 if (!new_pack) {
2279 unlink(tmp_idx);
2280 free(tmp_idx);
2281
2282 return -1; /* parse_pack_index() already issued error message */
2283 }
2284
2285 ret = verify_pack_index(new_pack);
2286 if (!ret) {
2287 close_pack_index(new_pack);
2288 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2289 }
2290 free(tmp_idx);
2291 if (ret)
2292 return -1;
2293
2294 add_pack:
2295 new_pack->next = *packs_head;
2296 *packs_head = new_pack;
2297 return 0;
2298 }
2299
2300 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2301 {
2302 struct http_get_options options = {0};
2303 int ret = 0;
2304 char *url;
2305 const char *data;
2306 struct strbuf buf = STRBUF_INIT;
2307 struct object_id oid;
2308
2309 end_url_with_slash(&buf, base_url);
2310 strbuf_addstr(&buf, "objects/info/packs");
2311 url = strbuf_detach(&buf, NULL);
2312
2313 options.no_cache = 1;
2314 ret = http_get_strbuf(url, &buf, &options);
2315 if (ret != HTTP_OK)
2316 goto cleanup;
2317
2318 data = buf.buf;
2319 while (*data) {
2320 if (skip_prefix(data, "P pack-", &data) &&
2321 !parse_oid_hex(data, &oid, &data) &&
2322 skip_prefix(data, ".pack", &data) &&
2323 (*data == '\n' || *data == '\0')) {
2324 fetch_and_setup_pack_index(packs_head, oid.hash, base_url);
2325 } else {
2326 data = strchrnul(data, '\n');
2327 }
2328 if (*data)
2329 data++; /* skip past newline */
2330 }
2331
2332 cleanup:
2333 free(url);
2334 return ret;
2335 }
2336
2337 void release_http_pack_request(struct http_pack_request *preq)
2338 {
2339 if (preq->packfile) {
2340 fclose(preq->packfile);
2341 preq->packfile = NULL;
2342 }
2343 preq->slot = NULL;
2344 strbuf_release(&preq->tmpfile);
2345 free(preq->url);
2346 free(preq);
2347 }
2348
2349 static const char *default_index_pack_args[] =
2350 {"index-pack", "--stdin", NULL};
2351
2352 int finish_http_pack_request(struct http_pack_request *preq)
2353 {
2354 struct child_process ip = CHILD_PROCESS_INIT;
2355 int tmpfile_fd;
2356 int ret = 0;
2357
2358 fclose(preq->packfile);
2359 preq->packfile = NULL;
2360
2361 tmpfile_fd = xopen(preq->tmpfile.buf, O_RDONLY);
2362
2363 ip.git_cmd = 1;
2364 ip.in = tmpfile_fd;
2365 strvec_pushv(&ip.args, preq->index_pack_args ?
2366 preq->index_pack_args :
2367 default_index_pack_args);
2368
2369 if (preq->preserve_index_pack_stdout)
2370 ip.out = 0;
2371 else
2372 ip.no_stdout = 1;
2373
2374 if (run_command(&ip)) {
2375 ret = -1;
2376 goto cleanup;
2377 }
2378
2379 cleanup:
2380 close(tmpfile_fd);
2381 unlink(preq->tmpfile.buf);
2382 return ret;
2383 }
2384
2385 void http_install_packfile(struct packed_git *p,
2386 struct packed_git **list_to_remove_from)
2387 {
2388 struct packed_git **lst = list_to_remove_from;
2389
2390 while (*lst != p)
2391 lst = &((*lst)->next);
2392 *lst = (*lst)->next;
2393
2394 install_packed_git(the_repository, p);
2395 }
2396
2397 struct http_pack_request *new_http_pack_request(
2398 const unsigned char *packed_git_hash, const char *base_url) {
2399
2400 struct strbuf buf = STRBUF_INIT;
2401
2402 end_url_with_slash(&buf, base_url);
2403 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2404 hash_to_hex(packed_git_hash));
2405 return new_direct_http_pack_request(packed_git_hash,
2406 strbuf_detach(&buf, NULL));
2407 }
2408
2409 struct http_pack_request *new_direct_http_pack_request(
2410 const unsigned char *packed_git_hash, char *url)
2411 {
2412 off_t prev_posn = 0;
2413 struct http_pack_request *preq;
2414
2415 CALLOC_ARRAY(preq, 1);
2416 strbuf_init(&preq->tmpfile, 0);
2417
2418 preq->url = url;
2419
2420 strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(packed_git_hash));
2421 preq->packfile = fopen(preq->tmpfile.buf, "a");
2422 if (!preq->packfile) {
2423 error("Unable to open local file %s for pack",
2424 preq->tmpfile.buf);
2425 goto abort;
2426 }
2427
2428 preq->slot = get_active_slot();
2429 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEDATA, preq->packfile);
2430 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2431 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2432 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2433 no_pragma_header);
2434
2435 /*
2436 * If there is data present from a previous transfer attempt,
2437 * resume where it left off
2438 */
2439 prev_posn = ftello(preq->packfile);
2440 if (prev_posn>0) {
2441 if (http_is_verbose)
2442 fprintf(stderr,
2443 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2444 hash_to_hex(packed_git_hash),
2445 (uintmax_t)prev_posn);
2446 http_opt_request_remainder(preq->slot->curl, prev_posn);
2447 }
2448
2449 return preq;
2450
2451 abort:
2452 strbuf_release(&preq->tmpfile);
2453 free(preq->url);
2454 free(preq);
2455 return NULL;
2456 }
2457
2458 /* Helpers for fetching objects (loose) */
2459 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2460 void *data)
2461 {
2462 unsigned char expn[4096];
2463 size_t size = eltsize * nmemb;
2464 int posn = 0;
2465 struct http_object_request *freq = data;
2466 struct active_request_slot *slot = freq->slot;
2467
2468 if (slot) {
2469 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2470 &slot->http_code);
2471 if (c != CURLE_OK)
2472 BUG("curl_easy_getinfo for HTTP code failed: %s",
2473 curl_easy_strerror(c));
2474 if (slot->http_code >= 300)
2475 return nmemb;
2476 }
2477
2478 do {
2479 ssize_t retval = xwrite(freq->localfile,
2480 (char *) ptr + posn, size - posn);
2481 if (retval < 0)
2482 return posn / eltsize;
2483 posn += retval;
2484 } while (posn < size);
2485
2486 freq->stream.avail_in = size;
2487 freq->stream.next_in = (void *)ptr;
2488 do {
2489 freq->stream.next_out = expn;
2490 freq->stream.avail_out = sizeof(expn);
2491 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2492 the_hash_algo->update_fn(&freq->c, expn,
2493 sizeof(expn) - freq->stream.avail_out);
2494 } while (freq->stream.avail_in && freq->zret == Z_OK);
2495 return nmemb;
2496 }
2497
2498 struct http_object_request *new_http_object_request(const char *base_url,
2499 const struct object_id *oid)
2500 {
2501 char *hex = oid_to_hex(oid);
2502 struct strbuf filename = STRBUF_INIT;
2503 struct strbuf prevfile = STRBUF_INIT;
2504 int prevlocal;
2505 char prev_buf[PREV_BUF_SIZE];
2506 ssize_t prev_read = 0;
2507 off_t prev_posn = 0;
2508 struct http_object_request *freq;
2509
2510 CALLOC_ARRAY(freq, 1);
2511 strbuf_init(&freq->tmpfile, 0);
2512 oidcpy(&freq->oid, oid);
2513 freq->localfile = -1;
2514
2515 loose_object_path(the_repository, &filename, oid);
2516 strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
2517
2518 strbuf_addf(&prevfile, "%s.prev", filename.buf);
2519 unlink_or_warn(prevfile.buf);
2520 rename(freq->tmpfile.buf, prevfile.buf);
2521 unlink_or_warn(freq->tmpfile.buf);
2522 strbuf_release(&filename);
2523
2524 if (freq->localfile != -1)
2525 error("fd leakage in start: %d", freq->localfile);
2526 freq->localfile = open(freq->tmpfile.buf,
2527 O_WRONLY | O_CREAT | O_EXCL, 0666);
2528 /*
2529 * This could have failed due to the "lazy directory creation";
2530 * try to mkdir the last path component.
2531 */
2532 if (freq->localfile < 0 && errno == ENOENT) {
2533 char *dir = strrchr(freq->tmpfile.buf, '/');
2534 if (dir) {
2535 *dir = 0;
2536 mkdir(freq->tmpfile.buf, 0777);
2537 *dir = '/';
2538 }
2539 freq->localfile = open(freq->tmpfile.buf,
2540 O_WRONLY | O_CREAT | O_EXCL, 0666);
2541 }
2542
2543 if (freq->localfile < 0) {
2544 error_errno("Couldn't create temporary file %s",
2545 freq->tmpfile.buf);
2546 goto abort;
2547 }
2548
2549 git_inflate_init(&freq->stream);
2550
2551 the_hash_algo->init_fn(&freq->c);
2552
2553 freq->url = get_remote_object_url(base_url, hex, 0);
2554
2555 /*
2556 * If a previous temp file is present, process what was already
2557 * fetched.
2558 */
2559 prevlocal = open(prevfile.buf, O_RDONLY);
2560 if (prevlocal != -1) {
2561 do {
2562 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2563 if (prev_read>0) {
2564 if (fwrite_sha1_file(prev_buf,
2565 1,
2566 prev_read,
2567 freq) == prev_read) {
2568 prev_posn += prev_read;
2569 } else {
2570 prev_read = -1;
2571 }
2572 }
2573 } while (prev_read > 0);
2574 close(prevlocal);
2575 }
2576 unlink_or_warn(prevfile.buf);
2577 strbuf_release(&prevfile);
2578
2579 /*
2580 * Reset inflate/SHA1 if there was an error reading the previous temp
2581 * file; also rewind to the beginning of the local file.
2582 */
2583 if (prev_read == -1) {
2584 memset(&freq->stream, 0, sizeof(freq->stream));
2585 git_inflate_init(&freq->stream);
2586 the_hash_algo->init_fn(&freq->c);
2587 if (prev_posn>0) {
2588 prev_posn = 0;
2589 lseek(freq->localfile, 0, SEEK_SET);
2590 if (ftruncate(freq->localfile, 0) < 0) {
2591 error_errno("Couldn't truncate temporary file %s",
2592 freq->tmpfile.buf);
2593 goto abort;
2594 }
2595 }
2596 }
2597
2598 freq->slot = get_active_slot();
2599
2600 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEDATA, freq);
2601 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2602 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2603 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2604 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2605 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2606
2607 /*
2608 * If we have successfully processed data from a previous fetch
2609 * attempt, only fetch the data we don't already have.
2610 */
2611 if (prev_posn>0) {
2612 if (http_is_verbose)
2613 fprintf(stderr,
2614 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2615 hex, (uintmax_t)prev_posn);
2616 http_opt_request_remainder(freq->slot->curl, prev_posn);
2617 }
2618
2619 return freq;
2620
2621 abort:
2622 strbuf_release(&prevfile);
2623 free(freq->url);
2624 free(freq);
2625 return NULL;
2626 }
2627
2628 void process_http_object_request(struct http_object_request *freq)
2629 {
2630 if (!freq->slot)
2631 return;
2632 freq->curl_result = freq->slot->curl_result;
2633 freq->http_code = freq->slot->http_code;
2634 freq->slot = NULL;
2635 }
2636
2637 int finish_http_object_request(struct http_object_request *freq)
2638 {
2639 struct stat st;
2640 struct strbuf filename = STRBUF_INIT;
2641
2642 close(freq->localfile);
2643 freq->localfile = -1;
2644
2645 process_http_object_request(freq);
2646
2647 if (freq->http_code == 416) {
2648 warning("requested range invalid; we may already have all the data.");
2649 } else if (freq->curl_result != CURLE_OK) {
2650 if (stat(freq->tmpfile.buf, &st) == 0)
2651 if (st.st_size == 0)
2652 unlink_or_warn(freq->tmpfile.buf);
2653 return -1;
2654 }
2655
2656 git_inflate_end(&freq->stream);
2657 the_hash_algo->final_oid_fn(&freq->real_oid, &freq->c);
2658 if (freq->zret != Z_STREAM_END) {
2659 unlink_or_warn(freq->tmpfile.buf);
2660 return -1;
2661 }
2662 if (!oideq(&freq->oid, &freq->real_oid)) {
2663 unlink_or_warn(freq->tmpfile.buf);
2664 return -1;
2665 }
2666 loose_object_path(the_repository, &filename, &freq->oid);
2667 freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
2668 strbuf_release(&filename);
2669
2670 return freq->rename;
2671 }
2672
2673 void abort_http_object_request(struct http_object_request *freq)
2674 {
2675 unlink_or_warn(freq->tmpfile.buf);
2676
2677 release_http_object_request(freq);
2678 }
2679
2680 void release_http_object_request(struct http_object_request *freq)
2681 {
2682 if (freq->localfile != -1) {
2683 close(freq->localfile);
2684 freq->localfile = -1;
2685 }
2686 FREE_AND_NULL(freq->url);
2687 if (freq->slot) {
2688 freq->slot->callback_func = NULL;
2689 freq->slot->callback_data = NULL;
2690 release_active_slot(freq->slot);
2691 freq->slot = NULL;
2692 }
2693 strbuf_release(&freq->tmpfile);
2694 }
git for Debian