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http: create function to get curl allowed protocols
[git.git] / http.c
blobf7c488af8b047627b42c850be1f6883ebab650d9
1 #include "git-compat-util.h"
2 #include "http.h"
3 #include "pack.h"
4 #include "sideband.h"
5 #include "run-command.h"
6 #include "url.h"
7 #include "urlmatch.h"
8 #include "credential.h"
9 #include "version.h"
10 #include "pkt-line.h"
11 #include "gettext.h"
12 #include "transport.h"
13
14 #if LIBCURL_VERSION_NUM >= 0x070a08
15 long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
16 #else
17 long int git_curl_ipresolve;
18 #endif
19 int active_requests;
20 int http_is_verbose;
21 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
22
23 #if LIBCURL_VERSION_NUM >= 0x070a06
24 #define LIBCURL_CAN_HANDLE_AUTH_ANY
25 #endif
26
27 static int min_curl_sessions = 1;
28 static int curl_session_count;
29 #ifdef USE_CURL_MULTI
30 static int max_requests = -1;
31 static CURLM *curlm;
32 #endif
33 #ifndef NO_CURL_EASY_DUPHANDLE
34 static CURL *curl_default;
35 #endif
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 *ssl_cert;
44 static const char *ssl_cipherlist;
45 static const char *ssl_version;
46 static struct {
47 const char *name;
48 long ssl_version;
49 } sslversions[] = {
50 { "sslv2", CURL_SSLVERSION_SSLv2 },
51 { "sslv3", CURL_SSLVERSION_SSLv3 },
52 { "tlsv1", CURL_SSLVERSION_TLSv1 },
53 #if LIBCURL_VERSION_NUM >= 0x072200
54 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
55 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
56 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
57 #endif
58 };
59 #if LIBCURL_VERSION_NUM >= 0x070903
60 static const char *ssl_key;
61 #endif
62 #if LIBCURL_VERSION_NUM >= 0x070908
63 static const char *ssl_capath;
64 #endif
65 #if LIBCURL_VERSION_NUM >= 0x072c00
66 static const char *ssl_pinnedkey;
67 #endif
68 static const char *ssl_cainfo;
69 static long curl_low_speed_limit = -1;
70 static long curl_low_speed_time = -1;
71 static int curl_ftp_no_epsv;
72 static const char *curl_http_proxy;
73 static const char *curl_no_proxy;
74 static const char *http_proxy_authmethod;
75 static struct {
76 const char *name;
77 long curlauth_param;
78 } proxy_authmethods[] = {
79 { "basic", CURLAUTH_BASIC },
80 { "digest", CURLAUTH_DIGEST },
81 { "negotiate", CURLAUTH_GSSNEGOTIATE },
82 { "ntlm", CURLAUTH_NTLM },
83 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
84 { "anyauth", CURLAUTH_ANY },
85 #endif
86 /*
87 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
88 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
89 * here, too
90 */
91 };
92 static struct credential proxy_auth = CREDENTIAL_INIT;
93 static const char *curl_proxyuserpwd;
94 static const char *curl_cookie_file;
95 static int curl_save_cookies;
96 struct credential http_auth = CREDENTIAL_INIT;
97 static int http_proactive_auth;
98 static const char *user_agent;
99 static int curl_empty_auth;
100
101 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
102
103 #if LIBCURL_VERSION_NUM >= 0x071700
104 /* Use CURLOPT_KEYPASSWD as is */
105 #elif LIBCURL_VERSION_NUM >= 0x070903
106 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
107 #else
108 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
109 #endif
110
111 static struct credential cert_auth = CREDENTIAL_INIT;
112 static int ssl_cert_password_required;
113 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
114 static unsigned long http_auth_methods = CURLAUTH_ANY;
115 #endif
116
117 static struct curl_slist *pragma_header;
118 static struct curl_slist *no_pragma_header;
119 static struct curl_slist *extra_http_headers;
120
121 static struct active_request_slot *active_queue_head;
122
123 static char *cached_accept_language;
124
125 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
126 {
127 size_t size = eltsize * nmemb;
128 struct buffer *buffer = buffer_;
129
130 if (size > buffer->buf.len - buffer->posn)
131 size = buffer->buf.len - buffer->posn;
132 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
133 buffer->posn += size;
134
135 return size;
136 }
137
138 #ifndef NO_CURL_IOCTL
139 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
140 {
141 struct buffer *buffer = clientp;
142
143 switch (cmd) {
144 case CURLIOCMD_NOP:
145 return CURLIOE_OK;
146
147 case CURLIOCMD_RESTARTREAD:
148 buffer->posn = 0;
149 return CURLIOE_OK;
150
151 default:
152 return CURLIOE_UNKNOWNCMD;
153 }
154 }
155 #endif
156
157 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
158 {
159 size_t size = eltsize * nmemb;
160 struct strbuf *buffer = buffer_;
161
162 strbuf_add(buffer, ptr, size);
163 return size;
164 }
165
166 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
167 {
168 return eltsize * nmemb;
169 }
170
171 static void closedown_active_slot(struct active_request_slot *slot)
172 {
173 active_requests--;
174 slot->in_use = 0;
175 }
176
177 static void finish_active_slot(struct active_request_slot *slot)
178 {
179 closedown_active_slot(slot);
180 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
181
182 if (slot->finished != NULL)
183 (*slot->finished) = 1;
184
185 /* Store slot results so they can be read after the slot is reused */
186 if (slot->results != NULL) {
187 slot->results->curl_result = slot->curl_result;
188 slot->results->http_code = slot->http_code;
189 #if LIBCURL_VERSION_NUM >= 0x070a08
190 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
191 &slot->results->auth_avail);
192 #else
193 slot->results->auth_avail = 0;
194 #endif
195
196 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
197 &slot->results->http_connectcode);
198 }
199
200 /* Run callback if appropriate */
201 if (slot->callback_func != NULL)
202 slot->callback_func(slot->callback_data);
203 }
204
205 #ifdef USE_CURL_MULTI
206 static void process_curl_messages(void)
207 {
208 int num_messages;
209 struct active_request_slot *slot;
210 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
211
212 while (curl_message != NULL) {
213 if (curl_message->msg == CURLMSG_DONE) {
214 int curl_result = curl_message->data.result;
215 slot = active_queue_head;
216 while (slot != NULL &&
217 slot->curl != curl_message->easy_handle)
218 slot = slot->next;
219 if (slot != NULL) {
220 curl_multi_remove_handle(curlm, slot->curl);
221 slot->curl_result = curl_result;
222 finish_active_slot(slot);
223 } else {
224 fprintf(stderr, "Received DONE message for unknown request!\n");
225 }
226 } else {
227 fprintf(stderr, "Unknown CURL message received: %d\n",
228 (int)curl_message->msg);
229 }
230 curl_message = curl_multi_info_read(curlm, &num_messages);
231 }
232 }
233 #endif
234
235 static int http_options(const char *var, const char *value, void *cb)
236 {
237 if (!strcmp("http.sslverify", var)) {
238 curl_ssl_verify = git_config_bool(var, value);
239 return 0;
240 }
241 if (!strcmp("http.sslcipherlist", var))
242 return git_config_string(&ssl_cipherlist, var, value);
243 if (!strcmp("http.sslversion", var))
244 return git_config_string(&ssl_version, var, value);
245 if (!strcmp("http.sslcert", var))
246 return git_config_string(&ssl_cert, var, value);
247 #if LIBCURL_VERSION_NUM >= 0x070903
248 if (!strcmp("http.sslkey", var))
249 return git_config_string(&ssl_key, var, value);
250 #endif
251 #if LIBCURL_VERSION_NUM >= 0x070908
252 if (!strcmp("http.sslcapath", var))
253 return git_config_pathname(&ssl_capath, var, value);
254 #endif
255 if (!strcmp("http.sslcainfo", var))
256 return git_config_pathname(&ssl_cainfo, var, value);
257 if (!strcmp("http.sslcertpasswordprotected", var)) {
258 ssl_cert_password_required = git_config_bool(var, value);
259 return 0;
260 }
261 if (!strcmp("http.ssltry", var)) {
262 curl_ssl_try = git_config_bool(var, value);
263 return 0;
264 }
265 if (!strcmp("http.minsessions", var)) {
266 min_curl_sessions = git_config_int(var, value);
267 #ifndef USE_CURL_MULTI
268 if (min_curl_sessions > 1)
269 min_curl_sessions = 1;
270 #endif
271 return 0;
272 }
273 #ifdef USE_CURL_MULTI
274 if (!strcmp("http.maxrequests", var)) {
275 max_requests = git_config_int(var, value);
276 return 0;
277 }
278 #endif
279 if (!strcmp("http.lowspeedlimit", var)) {
280 curl_low_speed_limit = (long)git_config_int(var, value);
281 return 0;
282 }
283 if (!strcmp("http.lowspeedtime", var)) {
284 curl_low_speed_time = (long)git_config_int(var, value);
285 return 0;
286 }
287
288 if (!strcmp("http.noepsv", var)) {
289 curl_ftp_no_epsv = git_config_bool(var, value);
290 return 0;
291 }
292 if (!strcmp("http.proxy", var))
293 return git_config_string(&curl_http_proxy, var, value);
294
295 if (!strcmp("http.proxyauthmethod", var))
296 return git_config_string(&http_proxy_authmethod, var, value);
297
298 if (!strcmp("http.cookiefile", var))
299 return git_config_pathname(&curl_cookie_file, var, value);
300 if (!strcmp("http.savecookies", var)) {
301 curl_save_cookies = git_config_bool(var, value);
302 return 0;
303 }
304
305 if (!strcmp("http.postbuffer", var)) {
306 http_post_buffer = git_config_int(var, value);
307 if (http_post_buffer < LARGE_PACKET_MAX)
308 http_post_buffer = LARGE_PACKET_MAX;
309 return 0;
310 }
311
312 if (!strcmp("http.useragent", var))
313 return git_config_string(&user_agent, var, value);
314
315 if (!strcmp("http.emptyauth", var)) {
316 curl_empty_auth = git_config_bool(var, value);
317 return 0;
318 }
319
320 if (!strcmp("http.pinnedpubkey", var)) {
321 #if LIBCURL_VERSION_NUM >= 0x072c00
322 return git_config_pathname(&ssl_pinnedkey, var, value);
323 #else
324 warning(_("Public key pinning not supported with cURL < 7.44.0"));
325 return 0;
326 #endif
327 }
328
329 if (!strcmp("http.extraheader", var)) {
330 if (!value) {
331 return config_error_nonbool(var);
332 } else if (!*value) {
333 curl_slist_free_all(extra_http_headers);
334 extra_http_headers = NULL;
335 } else {
336 extra_http_headers =
337 curl_slist_append(extra_http_headers, value);
338 }
339 return 0;
340 }
341
342 if (!strcmp("http.followredirects", var)) {
343 if (value && !strcmp(value, "initial"))
344 http_follow_config = HTTP_FOLLOW_INITIAL;
345 else if (git_config_bool(var, value))
346 http_follow_config = HTTP_FOLLOW_ALWAYS;
347 else
348 http_follow_config = HTTP_FOLLOW_NONE;
349 return 0;
350 }
351
352 /* Fall back on the default ones */
353 return git_default_config(var, value, cb);
354 }
355
356 static void init_curl_http_auth(CURL *result)
357 {
358 if (!http_auth.username) {
359 if (curl_empty_auth)
360 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
361 return;
362 }
363
364 credential_fill(&http_auth);
365
366 #if LIBCURL_VERSION_NUM >= 0x071301
367 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
368 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
369 #else
370 {
371 static struct strbuf up = STRBUF_INIT;
372 /*
373 * Note that we assume we only ever have a single set of
374 * credentials in a given program run, so we do not have
375 * to worry about updating this buffer, only setting its
376 * initial value.
377 */
378 if (!up.len)
379 strbuf_addf(&up, "%s:%s",
380 http_auth.username, http_auth.password);
381 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
382 }
383 #endif
384 }
385
386 /* *var must be free-able */
387 static void var_override(const char **var, char *value)
388 {
389 if (value) {
390 free((void *)*var);
391 *var = xstrdup(value);
392 }
393 }
394
395 static void set_proxyauth_name_password(CURL *result)
396 {
397 #if LIBCURL_VERSION_NUM >= 0x071301
398 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
399 proxy_auth.username);
400 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
401 proxy_auth.password);
402 #else
403 struct strbuf s = STRBUF_INIT;
404
405 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
406 strbuf_addch(&s, ':');
407 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
408 curl_proxyuserpwd = strbuf_detach(&s, NULL);
409 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
410 #endif
411 }
412
413 static void init_curl_proxy_auth(CURL *result)
414 {
415 if (proxy_auth.username) {
416 if (!proxy_auth.password)
417 credential_fill(&proxy_auth);
418 set_proxyauth_name_password(result);
419 }
420
421 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
422
423 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
424 if (http_proxy_authmethod) {
425 int i;
426 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
427 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
428 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
429 proxy_authmethods[i].curlauth_param);
430 break;
431 }
432 }
433 if (i == ARRAY_SIZE(proxy_authmethods)) {
434 warning("unsupported proxy authentication method %s: using anyauth",
435 http_proxy_authmethod);
436 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
437 }
438 }
439 else
440 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
441 #endif
442 }
443
444 static int has_cert_password(void)
445 {
446 if (ssl_cert == NULL || ssl_cert_password_required != 1)
447 return 0;
448 if (!cert_auth.password) {
449 cert_auth.protocol = xstrdup("cert");
450 cert_auth.username = xstrdup("");
451 cert_auth.path = xstrdup(ssl_cert);
452 credential_fill(&cert_auth);
453 }
454 return 1;
455 }
456
457 #if LIBCURL_VERSION_NUM >= 0x071900
458 static void set_curl_keepalive(CURL *c)
459 {
460 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
461 }
462
463 #elif LIBCURL_VERSION_NUM >= 0x071000
464 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
465 {
466 int ka = 1;
467 int rc;
468 socklen_t len = (socklen_t)sizeof(ka);
469
470 if (type != CURLSOCKTYPE_IPCXN)
471 return 0;
472
473 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
474 if (rc < 0)
475 warning_errno("unable to set SO_KEEPALIVE on socket");
476
477 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
478 }
479
480 static void set_curl_keepalive(CURL *c)
481 {
482 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
483 }
484
485 #else
486 static void set_curl_keepalive(CURL *c)
487 {
488 /* not supported on older curl versions */
489 }
490 #endif
491
492 static long get_curl_allowed_protocols(void)
493 {
494 long allowed_protocols = 0;
495
496 if (is_transport_allowed("http"))
497 allowed_protocols |= CURLPROTO_HTTP;
498 if (is_transport_allowed("https"))
499 allowed_protocols |= CURLPROTO_HTTPS;
500 if (is_transport_allowed("ftp"))
501 allowed_protocols |= CURLPROTO_FTP;
502 if (is_transport_allowed("ftps"))
503 allowed_protocols |= CURLPROTO_FTPS;
504
505 return allowed_protocols;
506 }
507
508 static CURL *get_curl_handle(void)
509 {
510 CURL *result = curl_easy_init();
511
512 if (!result)
513 die("curl_easy_init failed");
514
515 if (!curl_ssl_verify) {
516 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
517 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
518 } else {
519 /* Verify authenticity of the peer's certificate */
520 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
521 /* The name in the cert must match whom we tried to connect */
522 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
523 }
524
525 #if LIBCURL_VERSION_NUM >= 0x070907
526 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
527 #endif
528 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
529 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
530 #endif
531
532 if (http_proactive_auth)
533 init_curl_http_auth(result);
534
535 if (getenv("GIT_SSL_VERSION"))
536 ssl_version = getenv("GIT_SSL_VERSION");
537 if (ssl_version && *ssl_version) {
538 int i;
539 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
540 if (!strcmp(ssl_version, sslversions[i].name)) {
541 curl_easy_setopt(result, CURLOPT_SSLVERSION,
542 sslversions[i].ssl_version);
543 break;
544 }
545 }
546 if (i == ARRAY_SIZE(sslversions))
547 warning("unsupported ssl version %s: using default",
548 ssl_version);
549 }
550
551 if (getenv("GIT_SSL_CIPHER_LIST"))
552 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
553 if (ssl_cipherlist != NULL && *ssl_cipherlist)
554 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
555 ssl_cipherlist);
556
557 if (ssl_cert != NULL)
558 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
559 if (has_cert_password())
560 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
561 #if LIBCURL_VERSION_NUM >= 0x070903
562 if (ssl_key != NULL)
563 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
564 #endif
565 #if LIBCURL_VERSION_NUM >= 0x070908
566 if (ssl_capath != NULL)
567 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
568 #endif
569 #if LIBCURL_VERSION_NUM >= 0x072c00
570 if (ssl_pinnedkey != NULL)
571 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
572 #endif
573 if (ssl_cainfo != NULL)
574 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
575
576 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
577 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
578 curl_low_speed_limit);
579 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
580 curl_low_speed_time);
581 }
582
583 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
584 #if LIBCURL_VERSION_NUM >= 0x071301
585 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
586 #elif LIBCURL_VERSION_NUM >= 0x071101
587 curl_easy_setopt(result, CURLOPT_POST301, 1);
588 #endif
589 #if LIBCURL_VERSION_NUM >= 0x071304
590 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
591 get_curl_allowed_protocols());
592 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
593 get_curl_allowed_protocols());
594 #else
595 warning("protocol restrictions not applied to curl redirects because\n"
596 "your curl version is too old (>= 7.19.4)");
597 #endif
598
599 if (getenv("GIT_CURL_VERBOSE"))
600 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
601
602 curl_easy_setopt(result, CURLOPT_USERAGENT,
603 user_agent ? user_agent : git_user_agent());
604
605 if (curl_ftp_no_epsv)
606 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
607
608 #ifdef CURLOPT_USE_SSL
609 if (curl_ssl_try)
610 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
611 #endif
612
613 /*
614 * CURL also examines these variables as a fallback; but we need to query
615 * them here in order to decide whether to prompt for missing password (cf.
616 * init_curl_proxy_auth()).
617 *
618 * Unlike many other common environment variables, these are historically
619 * lowercase only. It appears that CURL did not know this and implemented
620 * only uppercase variants, which was later corrected to take both - with
621 * the exception of http_proxy, which is lowercase only also in CURL. As
622 * the lowercase versions are the historical quasi-standard, they take
623 * precedence here, as in CURL.
624 */
625 if (!curl_http_proxy) {
626 if (!strcmp(http_auth.protocol, "https")) {
627 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
628 var_override(&curl_http_proxy, getenv("https_proxy"));
629 } else {
630 var_override(&curl_http_proxy, getenv("http_proxy"));
631 }
632 if (!curl_http_proxy) {
633 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
634 var_override(&curl_http_proxy, getenv("all_proxy"));
635 }
636 }
637
638 if (curl_http_proxy) {
639 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
640 #if LIBCURL_VERSION_NUM >= 0x071800
641 if (starts_with(curl_http_proxy, "socks5h"))
642 curl_easy_setopt(result,
643 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
644 else if (starts_with(curl_http_proxy, "socks5"))
645 curl_easy_setopt(result,
646 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
647 else if (starts_with(curl_http_proxy, "socks4a"))
648 curl_easy_setopt(result,
649 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
650 else if (starts_with(curl_http_proxy, "socks"))
651 curl_easy_setopt(result,
652 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
653 #endif
654 if (strstr(curl_http_proxy, "://"))
655 credential_from_url(&proxy_auth, curl_http_proxy);
656 else {
657 struct strbuf url = STRBUF_INIT;
658 strbuf_addf(&url, "http://%s", curl_http_proxy);
659 credential_from_url(&proxy_auth, url.buf);
660 strbuf_release(&url);
661 }
662
663 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
664 #if LIBCURL_VERSION_NUM >= 0x071304
665 var_override(&curl_no_proxy, getenv("NO_PROXY"));
666 var_override(&curl_no_proxy, getenv("no_proxy"));
667 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
668 #endif
669 }
670 init_curl_proxy_auth(result);
671
672 set_curl_keepalive(result);
673
674 return result;
675 }
676
677 static void set_from_env(const char **var, const char *envname)
678 {
679 const char *val = getenv(envname);
680 if (val)
681 *var = val;
682 }
683
684 void http_init(struct remote *remote, const char *url, int proactive_auth)
685 {
686 char *low_speed_limit;
687 char *low_speed_time;
688 char *normalized_url;
689 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
690
691 config.section = "http";
692 config.key = NULL;
693 config.collect_fn = http_options;
694 config.cascade_fn = git_default_config;
695 config.cb = NULL;
696
697 http_is_verbose = 0;
698 normalized_url = url_normalize(url, &config.url);
699
700 git_config(urlmatch_config_entry, &config);
701 free(normalized_url);
702
703 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
704 die("curl_global_init failed");
705
706 http_proactive_auth = proactive_auth;
707
708 if (remote && remote->http_proxy)
709 curl_http_proxy = xstrdup(remote->http_proxy);
710
711 if (remote)
712 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
713
714 pragma_header = curl_slist_append(http_copy_default_headers(),
715 "Pragma: no-cache");
716 no_pragma_header = curl_slist_append(http_copy_default_headers(),
717 "Pragma:");
718
719 #ifdef USE_CURL_MULTI
720 {
721 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
722 if (http_max_requests != NULL)
723 max_requests = atoi(http_max_requests);
724 }
725
726 curlm = curl_multi_init();
727 if (!curlm)
728 die("curl_multi_init failed");
729 #endif
730
731 if (getenv("GIT_SSL_NO_VERIFY"))
732 curl_ssl_verify = 0;
733
734 set_from_env(&ssl_cert, "GIT_SSL_CERT");
735 #if LIBCURL_VERSION_NUM >= 0x070903
736 set_from_env(&ssl_key, "GIT_SSL_KEY");
737 #endif
738 #if LIBCURL_VERSION_NUM >= 0x070908
739 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
740 #endif
741 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
742
743 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
744
745 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
746 if (low_speed_limit != NULL)
747 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
748 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
749 if (low_speed_time != NULL)
750 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
751
752 if (curl_ssl_verify == -1)
753 curl_ssl_verify = 1;
754
755 curl_session_count = 0;
756 #ifdef USE_CURL_MULTI
757 if (max_requests < 1)
758 max_requests = DEFAULT_MAX_REQUESTS;
759 #endif
760
761 if (getenv("GIT_CURL_FTP_NO_EPSV"))
762 curl_ftp_no_epsv = 1;
763
764 if (url) {
765 credential_from_url(&http_auth, url);
766 if (!ssl_cert_password_required &&
767 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
768 starts_with(url, "https://"))
769 ssl_cert_password_required = 1;
770 }
771
772 #ifndef NO_CURL_EASY_DUPHANDLE
773 curl_default = get_curl_handle();
774 #endif
775 }
776
777 void http_cleanup(void)
778 {
779 struct active_request_slot *slot = active_queue_head;
780
781 while (slot != NULL) {
782 struct active_request_slot *next = slot->next;
783 if (slot->curl != NULL) {
784 #ifdef USE_CURL_MULTI
785 curl_multi_remove_handle(curlm, slot->curl);
786 #endif
787 curl_easy_cleanup(slot->curl);
788 }
789 free(slot);
790 slot = next;
791 }
792 active_queue_head = NULL;
793
794 #ifndef NO_CURL_EASY_DUPHANDLE
795 curl_easy_cleanup(curl_default);
796 #endif
797
798 #ifdef USE_CURL_MULTI
799 curl_multi_cleanup(curlm);
800 #endif
801 curl_global_cleanup();
802
803 curl_slist_free_all(extra_http_headers);
804 extra_http_headers = NULL;
805
806 curl_slist_free_all(pragma_header);
807 pragma_header = NULL;
808
809 curl_slist_free_all(no_pragma_header);
810 no_pragma_header = NULL;
811
812 if (curl_http_proxy) {
813 free((void *)curl_http_proxy);
814 curl_http_proxy = NULL;
815 }
816
817 if (proxy_auth.password) {
818 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
819 free(proxy_auth.password);
820 proxy_auth.password = NULL;
821 }
822
823 free((void *)curl_proxyuserpwd);
824 curl_proxyuserpwd = NULL;
825
826 free((void *)http_proxy_authmethod);
827 http_proxy_authmethod = NULL;
828
829 if (cert_auth.password != NULL) {
830 memset(cert_auth.password, 0, strlen(cert_auth.password));
831 free(cert_auth.password);
832 cert_auth.password = NULL;
833 }
834 ssl_cert_password_required = 0;
835
836 free(cached_accept_language);
837 cached_accept_language = NULL;
838 }
839
840 struct active_request_slot *get_active_slot(void)
841 {
842 struct active_request_slot *slot = active_queue_head;
843 struct active_request_slot *newslot;
844
845 #ifdef USE_CURL_MULTI
846 int num_transfers;
847
848 /* Wait for a slot to open up if the queue is full */
849 while (active_requests >= max_requests) {
850 curl_multi_perform(curlm, &num_transfers);
851 if (num_transfers < active_requests)
852 process_curl_messages();
853 }
854 #endif
855
856 while (slot != NULL && slot->in_use)
857 slot = slot->next;
858
859 if (slot == NULL) {
860 newslot = xmalloc(sizeof(*newslot));
861 newslot->curl = NULL;
862 newslot->in_use = 0;
863 newslot->next = NULL;
864
865 slot = active_queue_head;
866 if (slot == NULL) {
867 active_queue_head = newslot;
868 } else {
869 while (slot->next != NULL)
870 slot = slot->next;
871 slot->next = newslot;
872 }
873 slot = newslot;
874 }
875
876 if (slot->curl == NULL) {
877 #ifdef NO_CURL_EASY_DUPHANDLE
878 slot->curl = get_curl_handle();
879 #else
880 slot->curl = curl_easy_duphandle(curl_default);
881 #endif
882 curl_session_count++;
883 }
884
885 active_requests++;
886 slot->in_use = 1;
887 slot->results = NULL;
888 slot->finished = NULL;
889 slot->callback_data = NULL;
890 slot->callback_func = NULL;
891 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
892 if (curl_save_cookies)
893 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
894 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
895 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
896 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
897 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
898 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
899 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
900 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
901 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
902 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
903 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
904
905 /*
906 * Default following to off unless "ALWAYS" is configured; this gives
907 * callers a sane starting point, and they can tweak for individual
908 * HTTP_FOLLOW_* cases themselves.
909 */
910 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
911 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
912 else
913 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
914
915 #if LIBCURL_VERSION_NUM >= 0x070a08
916 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
917 #endif
918 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
919 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
920 #endif
921 if (http_auth.password || curl_empty_auth)
922 init_curl_http_auth(slot->curl);
923
924 return slot;
925 }
926
927 int start_active_slot(struct active_request_slot *slot)
928 {
929 #ifdef USE_CURL_MULTI
930 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
931 int num_transfers;
932
933 if (curlm_result != CURLM_OK &&
934 curlm_result != CURLM_CALL_MULTI_PERFORM) {
935 active_requests--;
936 slot->in_use = 0;
937 return 0;
938 }
939
940 /*
941 * We know there must be something to do, since we just added
942 * something.
943 */
944 curl_multi_perform(curlm, &num_transfers);
945 #endif
946 return 1;
947 }
948
949 #ifdef USE_CURL_MULTI
950 struct fill_chain {
951 void *data;
952 int (*fill)(void *);
953 struct fill_chain *next;
954 };
955
956 static struct fill_chain *fill_cfg;
957
958 void add_fill_function(void *data, int (*fill)(void *))
959 {
960 struct fill_chain *new = xmalloc(sizeof(*new));
961 struct fill_chain **linkp = &fill_cfg;
962 new->data = data;
963 new->fill = fill;
964 new->next = NULL;
965 while (*linkp)
966 linkp = &(*linkp)->next;
967 *linkp = new;
968 }
969
970 void fill_active_slots(void)
971 {
972 struct active_request_slot *slot = active_queue_head;
973
974 while (active_requests < max_requests) {
975 struct fill_chain *fill;
976 for (fill = fill_cfg; fill; fill = fill->next)
977 if (fill->fill(fill->data))
978 break;
979
980 if (!fill)
981 break;
982 }
983
984 while (slot != NULL) {
985 if (!slot->in_use && slot->curl != NULL
986 && curl_session_count > min_curl_sessions) {
987 curl_easy_cleanup(slot->curl);
988 slot->curl = NULL;
989 curl_session_count--;
990 }
991 slot = slot->next;
992 }
993 }
994
995 void step_active_slots(void)
996 {
997 int num_transfers;
998 CURLMcode curlm_result;
999
1000 do {
1001 curlm_result = curl_multi_perform(curlm, &num_transfers);
1002 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1003 if (num_transfers < active_requests) {
1004 process_curl_messages();
1005 fill_active_slots();
1006 }
1007 }
1008 #endif
1009
1010 void run_active_slot(struct active_request_slot *slot)
1011 {
1012 #ifdef USE_CURL_MULTI
1013 fd_set readfds;
1014 fd_set writefds;
1015 fd_set excfds;
1016 int max_fd;
1017 struct timeval select_timeout;
1018 int finished = 0;
1019
1020 slot->finished = &finished;
1021 while (!finished) {
1022 step_active_slots();
1023
1024 if (slot->in_use) {
1025 #if LIBCURL_VERSION_NUM >= 0x070f04
1026 long curl_timeout;
1027 curl_multi_timeout(curlm, &curl_timeout);
1028 if (curl_timeout == 0) {
1029 continue;
1030 } else if (curl_timeout == -1) {
1031 select_timeout.tv_sec = 0;
1032 select_timeout.tv_usec = 50000;
1033 } else {
1034 select_timeout.tv_sec = curl_timeout / 1000;
1035 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1036 }
1037 #else
1038 select_timeout.tv_sec = 0;
1039 select_timeout.tv_usec = 50000;
1040 #endif
1041
1042 max_fd = -1;
1043 FD_ZERO(&readfds);
1044 FD_ZERO(&writefds);
1045 FD_ZERO(&excfds);
1046 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1047
1048 /*
1049 * It can happen that curl_multi_timeout returns a pathologically
1050 * long timeout when curl_multi_fdset returns no file descriptors
1051 * to read. See commit message for more details.
1052 */
1053 if (max_fd < 0 &&
1054 (select_timeout.tv_sec > 0 ||
1055 select_timeout.tv_usec > 50000)) {
1056 select_timeout.tv_sec = 0;
1057 select_timeout.tv_usec = 50000;
1058 }
1059
1060 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1061 }
1062 }
1063 #else
1064 while (slot->in_use) {
1065 slot->curl_result = curl_easy_perform(slot->curl);
1066 finish_active_slot(slot);
1067 }
1068 #endif
1069 }
1070
1071 static void release_active_slot(struct active_request_slot *slot)
1072 {
1073 closedown_active_slot(slot);
1074 if (slot->curl && curl_session_count > min_curl_sessions) {
1075 #ifdef USE_CURL_MULTI
1076 curl_multi_remove_handle(curlm, slot->curl);
1077 #endif
1078 curl_easy_cleanup(slot->curl);
1079 slot->curl = NULL;
1080 curl_session_count--;
1081 }
1082 #ifdef USE_CURL_MULTI
1083 fill_active_slots();
1084 #endif
1085 }
1086
1087 void finish_all_active_slots(void)
1088 {
1089 struct active_request_slot *slot = active_queue_head;
1090
1091 while (slot != NULL)
1092 if (slot->in_use) {
1093 run_active_slot(slot);
1094 slot = active_queue_head;
1095 } else {
1096 slot = slot->next;
1097 }
1098 }
1099
1100 /* Helpers for modifying and creating URLs */
1101 static inline int needs_quote(int ch)
1102 {
1103 if (((ch >= 'A') && (ch <= 'Z'))
1104 || ((ch >= 'a') && (ch <= 'z'))
1105 || ((ch >= '0') && (ch <= '9'))
1106 || (ch == '/')
1107 || (ch == '-')
1108 || (ch == '.'))
1109 return 0;
1110 return 1;
1111 }
1112
1113 static char *quote_ref_url(const char *base, const char *ref)
1114 {
1115 struct strbuf buf = STRBUF_INIT;
1116 const char *cp;
1117 int ch;
1118
1119 end_url_with_slash(&buf, base);
1120
1121 for (cp = ref; (ch = *cp) != 0; cp++)
1122 if (needs_quote(ch))
1123 strbuf_addf(&buf, "%%%02x", ch);
1124 else
1125 strbuf_addch(&buf, *cp);
1126
1127 return strbuf_detach(&buf, NULL);
1128 }
1129
1130 void append_remote_object_url(struct strbuf *buf, const char *url,
1131 const char *hex,
1132 int only_two_digit_prefix)
1133 {
1134 end_url_with_slash(buf, url);
1135
1136 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1137 if (!only_two_digit_prefix)
1138 strbuf_addstr(buf, hex + 2);
1139 }
1140
1141 char *get_remote_object_url(const char *url, const char *hex,
1142 int only_two_digit_prefix)
1143 {
1144 struct strbuf buf = STRBUF_INIT;
1145 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1146 return strbuf_detach(&buf, NULL);
1147 }
1148
1149 static int handle_curl_result(struct slot_results *results)
1150 {
1151 /*
1152 * If we see a failing http code with CURLE_OK, we have turned off
1153 * FAILONERROR (to keep the server's custom error response), and should
1154 * translate the code into failure here.
1155 *
1156 * Likewise, if we see a redirect (30x code), that means we turned off
1157 * redirect-following, and we should treat the result as an error.
1158 */
1159 if (results->curl_result == CURLE_OK &&
1160 results->http_code >= 300) {
1161 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1162 /*
1163 * Normally curl will already have put the "reason phrase"
1164 * from the server into curl_errorstr; unfortunately without
1165 * FAILONERROR it is lost, so we can give only the numeric
1166 * status code.
1167 */
1168 snprintf(curl_errorstr, sizeof(curl_errorstr),
1169 "The requested URL returned error: %ld",
1170 results->http_code);
1171 }
1172
1173 if (results->curl_result == CURLE_OK) {
1174 credential_approve(&http_auth);
1175 if (proxy_auth.password)
1176 credential_approve(&proxy_auth);
1177 return HTTP_OK;
1178 } else if (missing_target(results))
1179 return HTTP_MISSING_TARGET;
1180 else if (results->http_code == 401) {
1181 if (http_auth.username && http_auth.password) {
1182 credential_reject(&http_auth);
1183 return HTTP_NOAUTH;
1184 } else {
1185 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1186 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1187 #endif
1188 return HTTP_REAUTH;
1189 }
1190 } else {
1191 if (results->http_connectcode == 407)
1192 credential_reject(&proxy_auth);
1193 #if LIBCURL_VERSION_NUM >= 0x070c00
1194 if (!curl_errorstr[0])
1195 strlcpy(curl_errorstr,
1196 curl_easy_strerror(results->curl_result),
1197 sizeof(curl_errorstr));
1198 #endif
1199 return HTTP_ERROR;
1200 }
1201 }
1202
1203 int run_one_slot(struct active_request_slot *slot,
1204 struct slot_results *results)
1205 {
1206 slot->results = results;
1207 if (!start_active_slot(slot)) {
1208 snprintf(curl_errorstr, sizeof(curl_errorstr),
1209 "failed to start HTTP request");
1210 return HTTP_START_FAILED;
1211 }
1212
1213 run_active_slot(slot);
1214 return handle_curl_result(results);
1215 }
1216
1217 struct curl_slist *http_copy_default_headers(void)
1218 {
1219 struct curl_slist *headers = NULL, *h;
1220
1221 for (h = extra_http_headers; h; h = h->next)
1222 headers = curl_slist_append(headers, h->data);
1223
1224 return headers;
1225 }
1226
1227 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1228 {
1229 char *ptr;
1230 CURLcode ret;
1231
1232 strbuf_reset(buf);
1233 ret = curl_easy_getinfo(curl, info, &ptr);
1234 if (!ret && ptr)
1235 strbuf_addstr(buf, ptr);
1236 return ret;
1237 }
1238
1239 /*
1240 * Check for and extract a content-type parameter. "raw"
1241 * should be positioned at the start of the potential
1242 * parameter, with any whitespace already removed.
1243 *
1244 * "name" is the name of the parameter. The value is appended
1245 * to "out".
1246 */
1247 static int extract_param(const char *raw, const char *name,
1248 struct strbuf *out)
1249 {
1250 size_t len = strlen(name);
1251
1252 if (strncasecmp(raw, name, len))
1253 return -1;
1254 raw += len;
1255
1256 if (*raw != '=')
1257 return -1;
1258 raw++;
1259
1260 while (*raw && !isspace(*raw) && *raw != ';')
1261 strbuf_addch(out, *raw++);
1262 return 0;
1263 }
1264
1265 /*
1266 * Extract a normalized version of the content type, with any
1267 * spaces suppressed, all letters lowercased, and no trailing ";"
1268 * or parameters.
1269 *
1270 * Note that we will silently remove even invalid whitespace. For
1271 * example, "text / plain" is specifically forbidden by RFC 2616,
1272 * but "text/plain" is the only reasonable output, and this keeps
1273 * our code simple.
1274 *
1275 * If the "charset" argument is not NULL, store the value of any
1276 * charset parameter there.
1277 *
1278 * Example:
1279 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1280 * "text / plain" -> "text/plain"
1281 */
1282 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1283 struct strbuf *charset)
1284 {
1285 const char *p;
1286
1287 strbuf_reset(type);
1288 strbuf_grow(type, raw->len);
1289 for (p = raw->buf; *p; p++) {
1290 if (isspace(*p))
1291 continue;
1292 if (*p == ';') {
1293 p++;
1294 break;
1295 }
1296 strbuf_addch(type, tolower(*p));
1297 }
1298
1299 if (!charset)
1300 return;
1301
1302 strbuf_reset(charset);
1303 while (*p) {
1304 while (isspace(*p) || *p == ';')
1305 p++;
1306 if (!extract_param(p, "charset", charset))
1307 return;
1308 while (*p && !isspace(*p))
1309 p++;
1310 }
1311
1312 if (!charset->len && starts_with(type->buf, "text/"))
1313 strbuf_addstr(charset, "ISO-8859-1");
1314 }
1315
1316 static void write_accept_language(struct strbuf *buf)
1317 {
1318 /*
1319 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1320 * that, q-value will be smaller than 0.001, the minimum q-value the
1321 * HTTP specification allows. See
1322 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1323 */
1324 const int MAX_DECIMAL_PLACES = 3;
1325 const int MAX_LANGUAGE_TAGS = 1000;
1326 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1327 char **language_tags = NULL;
1328 int num_langs = 0;
1329 const char *s = get_preferred_languages();
1330 int i;
1331 struct strbuf tag = STRBUF_INIT;
1332
1333 /* Don't add Accept-Language header if no language is preferred. */
1334 if (!s)
1335 return;
1336
1337 /*
1338 * Split the colon-separated string of preferred languages into
1339 * language_tags array.
1340 */
1341 do {
1342 /* collect language tag */
1343 for (; *s && (isalnum(*s) || *s == '_'); s++)
1344 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1345
1346 /* skip .codeset, @modifier and any other unnecessary parts */
1347 while (*s && *s != ':')
1348 s++;
1349
1350 if (tag.len) {
1351 num_langs++;
1352 REALLOC_ARRAY(language_tags, num_langs);
1353 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1354 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1355 break;
1356 }
1357 } while (*s++);
1358
1359 /* write Accept-Language header into buf */
1360 if (num_langs) {
1361 int last_buf_len = 0;
1362 int max_q;
1363 int decimal_places;
1364 char q_format[32];
1365
1366 /* add '*' */
1367 REALLOC_ARRAY(language_tags, num_langs + 1);
1368 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1369
1370 /* compute decimal_places */
1371 for (max_q = 1, decimal_places = 0;
1372 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1373 decimal_places++, max_q *= 10)
1374 ;
1375
1376 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1377
1378 strbuf_addstr(buf, "Accept-Language: ");
1379
1380 for (i = 0; i < num_langs; i++) {
1381 if (i > 0)
1382 strbuf_addstr(buf, ", ");
1383
1384 strbuf_addstr(buf, language_tags[i]);
1385
1386 if (i > 0)
1387 strbuf_addf(buf, q_format, max_q - i);
1388
1389 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1390 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1391 break;
1392 }
1393
1394 last_buf_len = buf->len;
1395 }
1396 }
1397
1398 /* free language tags -- last one is a static '*' */
1399 for (i = 0; i < num_langs - 1; i++)
1400 free(language_tags[i]);
1401 free(language_tags);
1402 }
1403
1404 /*
1405 * Get an Accept-Language header which indicates user's preferred languages.
1406 *
1407 * Examples:
1408 * LANGUAGE= -> ""
1409 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1410 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1411 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1412 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1413 * LANGUAGE= LANG=C -> ""
1414 */
1415 static const char *get_accept_language(void)
1416 {
1417 if (!cached_accept_language) {
1418 struct strbuf buf = STRBUF_INIT;
1419 write_accept_language(&buf);
1420 if (buf.len > 0)
1421 cached_accept_language = strbuf_detach(&buf, NULL);
1422 }
1423
1424 return cached_accept_language;
1425 }
1426
1427 static void http_opt_request_remainder(CURL *curl, off_t pos)
1428 {
1429 char buf[128];
1430 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1431 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1432 }
1433
1434 /* http_request() targets */
1435 #define HTTP_REQUEST_STRBUF 0
1436 #define HTTP_REQUEST_FILE 1
1437
1438 static int http_request(const char *url,
1439 void *result, int target,
1440 const struct http_get_options *options)
1441 {
1442 struct active_request_slot *slot;
1443 struct slot_results results;
1444 struct curl_slist *headers = http_copy_default_headers();
1445 struct strbuf buf = STRBUF_INIT;
1446 const char *accept_language;
1447 int ret;
1448
1449 slot = get_active_slot();
1450 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1451
1452 if (result == NULL) {
1453 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1454 } else {
1455 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1456 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1457
1458 if (target == HTTP_REQUEST_FILE) {
1459 off_t posn = ftello(result);
1460 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1461 fwrite);
1462 if (posn > 0)
1463 http_opt_request_remainder(slot->curl, posn);
1464 } else
1465 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1466 fwrite_buffer);
1467 }
1468
1469 accept_language = get_accept_language();
1470
1471 if (accept_language)
1472 headers = curl_slist_append(headers, accept_language);
1473
1474 strbuf_addstr(&buf, "Pragma:");
1475 if (options && options->no_cache)
1476 strbuf_addstr(&buf, " no-cache");
1477 if (options && options->keep_error)
1478 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1479 if (options && options->initial_request &&
1480 http_follow_config == HTTP_FOLLOW_INITIAL)
1481 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1482
1483 headers = curl_slist_append(headers, buf.buf);
1484
1485 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1486 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1487 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1488
1489 ret = run_one_slot(slot, &results);
1490
1491 if (options && options->content_type) {
1492 struct strbuf raw = STRBUF_INIT;
1493 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1494 extract_content_type(&raw, options->content_type,
1495 options->charset);
1496 strbuf_release(&raw);
1497 }
1498
1499 if (options && options->effective_url)
1500 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1501 options->effective_url);
1502
1503 curl_slist_free_all(headers);
1504 strbuf_release(&buf);
1505
1506 return ret;
1507 }
1508
1509 /*
1510 * Update the "base" url to a more appropriate value, as deduced by
1511 * redirects seen when requesting a URL starting with "url".
1512 *
1513 * The "asked" parameter is a URL that we asked curl to access, and must begin
1514 * with "base".
1515 *
1516 * The "got" parameter is the URL that curl reported to us as where we ended
1517 * up.
1518 *
1519 * Returns 1 if we updated the base url, 0 otherwise.
1520 *
1521 * Our basic strategy is to compare "base" and "asked" to find the bits
1522 * specific to our request. We then strip those bits off of "got" to yield the
1523 * new base. So for example, if our base is "http://example.com/foo.git",
1524 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1525 * with "https://other.example.com/foo.git/info/refs". We would want the
1526 * new URL to become "https://other.example.com/foo.git".
1527 *
1528 * Note that this assumes a sane redirect scheme. It's entirely possible
1529 * in the example above to end up at a URL that does not even end in
1530 * "info/refs". In such a case we die. There's not much we can do, such a
1531 * scheme is unlikely to represent a real git repository, and failing to
1532 * rewrite the base opens options for malicious redirects to do funny things.
1533 */
1534 static int update_url_from_redirect(struct strbuf *base,
1535 const char *asked,
1536 const struct strbuf *got)
1537 {
1538 const char *tail;
1539 size_t new_len;
1540
1541 if (!strcmp(asked, got->buf))
1542 return 0;
1543
1544 if (!skip_prefix(asked, base->buf, &tail))
1545 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1546 asked, base->buf);
1547
1548 new_len = got->len;
1549 if (!strip_suffix_mem(got->buf, &new_len, tail))
1550 die(_("unable to update url base from redirection:\n"
1551 " asked for: %s\n"
1552 " redirect: %s"),
1553 asked, got->buf);
1554
1555 strbuf_reset(base);
1556 strbuf_add(base, got->buf, new_len);
1557
1558 return 1;
1559 }
1560
1561 static int http_request_reauth(const char *url,
1562 void *result, int target,
1563 struct http_get_options *options)
1564 {
1565 int ret = http_request(url, result, target, options);
1566
1567 if (options && options->effective_url && options->base_url) {
1568 if (update_url_from_redirect(options->base_url,
1569 url, options->effective_url)) {
1570 credential_from_url(&http_auth, options->base_url->buf);
1571 url = options->effective_url->buf;
1572 }
1573 }
1574
1575 if (ret != HTTP_REAUTH)
1576 return ret;
1577
1578 /*
1579 * If we are using KEEP_ERROR, the previous request may have
1580 * put cruft into our output stream; we should clear it out before
1581 * making our next request. We only know how to do this for
1582 * the strbuf case, but that is enough to satisfy current callers.
1583 */
1584 if (options && options->keep_error) {
1585 switch (target) {
1586 case HTTP_REQUEST_STRBUF:
1587 strbuf_reset(result);
1588 break;
1589 default:
1590 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1591 }
1592 }
1593
1594 credential_fill(&http_auth);
1595
1596 return http_request(url, result, target, options);
1597 }
1598
1599 int http_get_strbuf(const char *url,
1600 struct strbuf *result,
1601 struct http_get_options *options)
1602 {
1603 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1604 }
1605
1606 /*
1607 * Downloads a URL and stores the result in the given file.
1608 *
1609 * If a previous interrupted download is detected (i.e. a previous temporary
1610 * file is still around) the download is resumed.
1611 */
1612 static int http_get_file(const char *url, const char *filename,
1613 struct http_get_options *options)
1614 {
1615 int ret;
1616 struct strbuf tmpfile = STRBUF_INIT;
1617 FILE *result;
1618
1619 strbuf_addf(&tmpfile, "%s.temp", filename);
1620 result = fopen(tmpfile.buf, "a");
1621 if (!result) {
1622 error("Unable to open local file %s", tmpfile.buf);
1623 ret = HTTP_ERROR;
1624 goto cleanup;
1625 }
1626
1627 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1628 fclose(result);
1629
1630 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1631 ret = HTTP_ERROR;
1632 cleanup:
1633 strbuf_release(&tmpfile);
1634 return ret;
1635 }
1636
1637 int http_fetch_ref(const char *base, struct ref *ref)
1638 {
1639 struct http_get_options options = {0};
1640 char *url;
1641 struct strbuf buffer = STRBUF_INIT;
1642 int ret = -1;
1643
1644 options.no_cache = 1;
1645
1646 url = quote_ref_url(base, ref->name);
1647 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1648 strbuf_rtrim(&buffer);
1649 if (buffer.len == 40)
1650 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1651 else if (starts_with(buffer.buf, "ref: ")) {
1652 ref->symref = xstrdup(buffer.buf + 5);
1653 ret = 0;
1654 }
1655 }
1656
1657 strbuf_release(&buffer);
1658 free(url);
1659 return ret;
1660 }
1661
1662 /* Helpers for fetching packs */
1663 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1664 {
1665 char *url, *tmp;
1666 struct strbuf buf = STRBUF_INIT;
1667
1668 if (http_is_verbose)
1669 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1670
1671 end_url_with_slash(&buf, base_url);
1672 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1673 url = strbuf_detach(&buf, NULL);
1674
1675 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1676 tmp = strbuf_detach(&buf, NULL);
1677
1678 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1679 error("Unable to get pack index %s", url);
1680 free(tmp);
1681 tmp = NULL;
1682 }
1683
1684 free(url);
1685 return tmp;
1686 }
1687
1688 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1689 unsigned char *sha1, const char *base_url)
1690 {
1691 struct packed_git *new_pack;
1692 char *tmp_idx = NULL;
1693 int ret;
1694
1695 if (has_pack_index(sha1)) {
1696 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1697 if (!new_pack)
1698 return -1; /* parse_pack_index() already issued error message */
1699 goto add_pack;
1700 }
1701
1702 tmp_idx = fetch_pack_index(sha1, base_url);
1703 if (!tmp_idx)
1704 return -1;
1705
1706 new_pack = parse_pack_index(sha1, tmp_idx);
1707 if (!new_pack) {
1708 unlink(tmp_idx);
1709 free(tmp_idx);
1710
1711 return -1; /* parse_pack_index() already issued error message */
1712 }
1713
1714 ret = verify_pack_index(new_pack);
1715 if (!ret) {
1716 close_pack_index(new_pack);
1717 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1718 }
1719 free(tmp_idx);
1720 if (ret)
1721 return -1;
1722
1723 add_pack:
1724 new_pack->next = *packs_head;
1725 *packs_head = new_pack;
1726 return 0;
1727 }
1728
1729 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1730 {
1731 struct http_get_options options = {0};
1732 int ret = 0, i = 0;
1733 char *url, *data;
1734 struct strbuf buf = STRBUF_INIT;
1735 unsigned char sha1[20];
1736
1737 end_url_with_slash(&buf, base_url);
1738 strbuf_addstr(&buf, "objects/info/packs");
1739 url = strbuf_detach(&buf, NULL);
1740
1741 options.no_cache = 1;
1742 ret = http_get_strbuf(url, &buf, &options);
1743 if (ret != HTTP_OK)
1744 goto cleanup;
1745
1746 data = buf.buf;
1747 while (i < buf.len) {
1748 switch (data[i]) {
1749 case 'P':
1750 i++;
1751 if (i + 52 <= buf.len &&
1752 starts_with(data + i, " pack-") &&
1753 starts_with(data + i + 46, ".pack\n")) {
1754 get_sha1_hex(data + i + 6, sha1);
1755 fetch_and_setup_pack_index(packs_head, sha1,
1756 base_url);
1757 i += 51;
1758 break;
1759 }
1760 default:
1761 while (i < buf.len && data[i] != '\n')
1762 i++;
1763 }
1764 i++;
1765 }
1766
1767 cleanup:
1768 free(url);
1769 return ret;
1770 }
1771
1772 void release_http_pack_request(struct http_pack_request *preq)
1773 {
1774 if (preq->packfile != NULL) {
1775 fclose(preq->packfile);
1776 preq->packfile = NULL;
1777 }
1778 preq->slot = NULL;
1779 free(preq->url);
1780 free(preq);
1781 }
1782
1783 int finish_http_pack_request(struct http_pack_request *preq)
1784 {
1785 struct packed_git **lst;
1786 struct packed_git *p = preq->target;
1787 char *tmp_idx;
1788 size_t len;
1789 struct child_process ip = CHILD_PROCESS_INIT;
1790 const char *ip_argv[8];
1791
1792 close_pack_index(p);
1793
1794 fclose(preq->packfile);
1795 preq->packfile = NULL;
1796
1797 lst = preq->lst;
1798 while (*lst != p)
1799 lst = &((*lst)->next);
1800 *lst = (*lst)->next;
1801
1802 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
1803 die("BUG: pack tmpfile does not end in .pack.temp?");
1804 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
1805
1806 ip_argv[0] = "index-pack";
1807 ip_argv[1] = "-o";
1808 ip_argv[2] = tmp_idx;
1809 ip_argv[3] = preq->tmpfile;
1810 ip_argv[4] = NULL;
1811
1812 ip.argv = ip_argv;
1813 ip.git_cmd = 1;
1814 ip.no_stdin = 1;
1815 ip.no_stdout = 1;
1816
1817 if (run_command(&ip)) {
1818 unlink(preq->tmpfile);
1819 unlink(tmp_idx);
1820 free(tmp_idx);
1821 return -1;
1822 }
1823
1824 unlink(sha1_pack_index_name(p->sha1));
1825
1826 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
1827 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1828 free(tmp_idx);
1829 return -1;
1830 }
1831
1832 install_packed_git(p);
1833 free(tmp_idx);
1834 return 0;
1835 }
1836
1837 struct http_pack_request *new_http_pack_request(
1838 struct packed_git *target, const char *base_url)
1839 {
1840 off_t prev_posn = 0;
1841 struct strbuf buf = STRBUF_INIT;
1842 struct http_pack_request *preq;
1843
1844 preq = xcalloc(1, sizeof(*preq));
1845 preq->target = target;
1846
1847 end_url_with_slash(&buf, base_url);
1848 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1849 sha1_to_hex(target->sha1));
1850 preq->url = strbuf_detach(&buf, NULL);
1851
1852 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1853 sha1_pack_name(target->sha1));
1854 preq->packfile = fopen(preq->tmpfile, "a");
1855 if (!preq->packfile) {
1856 error("Unable to open local file %s for pack",
1857 preq->tmpfile);
1858 goto abort;
1859 }
1860
1861 preq->slot = get_active_slot();
1862 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1863 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1864 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1865 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1866 no_pragma_header);
1867
1868 /*
1869 * If there is data present from a previous transfer attempt,
1870 * resume where it left off
1871 */
1872 prev_posn = ftello(preq->packfile);
1873 if (prev_posn>0) {
1874 if (http_is_verbose)
1875 fprintf(stderr,
1876 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
1877 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
1878 http_opt_request_remainder(preq->slot->curl, prev_posn);
1879 }
1880
1881 return preq;
1882
1883 abort:
1884 free(preq->url);
1885 free(preq);
1886 return NULL;
1887 }
1888
1889 /* Helpers for fetching objects (loose) */
1890 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1891 void *data)
1892 {
1893 unsigned char expn[4096];
1894 size_t size = eltsize * nmemb;
1895 int posn = 0;
1896 struct http_object_request *freq = data;
1897 struct active_request_slot *slot = freq->slot;
1898
1899 if (slot) {
1900 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
1901 &slot->http_code);
1902 if (c != CURLE_OK)
1903 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
1904 curl_easy_strerror(c));
1905 if (slot->http_code >= 300)
1906 return size;
1907 }
1908
1909 do {
1910 ssize_t retval = xwrite(freq->localfile,
1911 (char *) ptr + posn, size - posn);
1912 if (retval < 0)
1913 return posn;
1914 posn += retval;
1915 } while (posn < size);
1916
1917 freq->stream.avail_in = size;
1918 freq->stream.next_in = (void *)ptr;
1919 do {
1920 freq->stream.next_out = expn;
1921 freq->stream.avail_out = sizeof(expn);
1922 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1923 git_SHA1_Update(&freq->c, expn,
1924 sizeof(expn) - freq->stream.avail_out);
1925 } while (freq->stream.avail_in && freq->zret == Z_OK);
1926 return size;
1927 }
1928
1929 struct http_object_request *new_http_object_request(const char *base_url,
1930 unsigned char *sha1)
1931 {
1932 char *hex = sha1_to_hex(sha1);
1933 const char *filename;
1934 char prevfile[PATH_MAX];
1935 int prevlocal;
1936 char prev_buf[PREV_BUF_SIZE];
1937 ssize_t prev_read = 0;
1938 off_t prev_posn = 0;
1939 struct http_object_request *freq;
1940
1941 freq = xcalloc(1, sizeof(*freq));
1942 hashcpy(freq->sha1, sha1);
1943 freq->localfile = -1;
1944
1945 filename = sha1_file_name(sha1);
1946 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1947 "%s.temp", filename);
1948
1949 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1950 unlink_or_warn(prevfile);
1951 rename(freq->tmpfile, prevfile);
1952 unlink_or_warn(freq->tmpfile);
1953
1954 if (freq->localfile != -1)
1955 error("fd leakage in start: %d", freq->localfile);
1956 freq->localfile = open(freq->tmpfile,
1957 O_WRONLY | O_CREAT | O_EXCL, 0666);
1958 /*
1959 * This could have failed due to the "lazy directory creation";
1960 * try to mkdir the last path component.
1961 */
1962 if (freq->localfile < 0 && errno == ENOENT) {
1963 char *dir = strrchr(freq->tmpfile, '/');
1964 if (dir) {
1965 *dir = 0;
1966 mkdir(freq->tmpfile, 0777);
1967 *dir = '/';
1968 }
1969 freq->localfile = open(freq->tmpfile,
1970 O_WRONLY | O_CREAT | O_EXCL, 0666);
1971 }
1972
1973 if (freq->localfile < 0) {
1974 error_errno("Couldn't create temporary file %s", freq->tmpfile);
1975 goto abort;
1976 }
1977
1978 git_inflate_init(&freq->stream);
1979
1980 git_SHA1_Init(&freq->c);
1981
1982 freq->url = get_remote_object_url(base_url, hex, 0);
1983
1984 /*
1985 * If a previous temp file is present, process what was already
1986 * fetched.
1987 */
1988 prevlocal = open(prevfile, O_RDONLY);
1989 if (prevlocal != -1) {
1990 do {
1991 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1992 if (prev_read>0) {
1993 if (fwrite_sha1_file(prev_buf,
1994 1,
1995 prev_read,
1996 freq) == prev_read) {
1997 prev_posn += prev_read;
1998 } else {
1999 prev_read = -1;
2000 }
2001 }
2002 } while (prev_read > 0);
2003 close(prevlocal);
2004 }
2005 unlink_or_warn(prevfile);
2006
2007 /*
2008 * Reset inflate/SHA1 if there was an error reading the previous temp
2009 * file; also rewind to the beginning of the local file.
2010 */
2011 if (prev_read == -1) {
2012 memset(&freq->stream, 0, sizeof(freq->stream));
2013 git_inflate_init(&freq->stream);
2014 git_SHA1_Init(&freq->c);
2015 if (prev_posn>0) {
2016 prev_posn = 0;
2017 lseek(freq->localfile, 0, SEEK_SET);
2018 if (ftruncate(freq->localfile, 0) < 0) {
2019 error_errno("Couldn't truncate temporary file %s",
2020 freq->tmpfile);
2021 goto abort;
2022 }
2023 }
2024 }
2025
2026 freq->slot = get_active_slot();
2027
2028 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2029 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2030 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2031 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2032 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2033 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2034
2035 /*
2036 * If we have successfully processed data from a previous fetch
2037 * attempt, only fetch the data we don't already have.
2038 */
2039 if (prev_posn>0) {
2040 if (http_is_verbose)
2041 fprintf(stderr,
2042 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2043 hex, (uintmax_t)prev_posn);
2044 http_opt_request_remainder(freq->slot->curl, prev_posn);
2045 }
2046
2047 return freq;
2048
2049 abort:
2050 free(freq->url);
2051 free(freq);
2052 return NULL;
2053 }
2054
2055 void process_http_object_request(struct http_object_request *freq)
2056 {
2057 if (freq->slot == NULL)
2058 return;
2059 freq->curl_result = freq->slot->curl_result;
2060 freq->http_code = freq->slot->http_code;
2061 freq->slot = NULL;
2062 }
2063
2064 int finish_http_object_request(struct http_object_request *freq)
2065 {
2066 struct stat st;
2067
2068 close(freq->localfile);
2069 freq->localfile = -1;
2070
2071 process_http_object_request(freq);
2072
2073 if (freq->http_code == 416) {
2074 warning("requested range invalid; we may already have all the data.");
2075 } else if (freq->curl_result != CURLE_OK) {
2076 if (stat(freq->tmpfile, &st) == 0)
2077 if (st.st_size == 0)
2078 unlink_or_warn(freq->tmpfile);
2079 return -1;
2080 }
2081
2082 git_inflate_end(&freq->stream);
2083 git_SHA1_Final(freq->real_sha1, &freq->c);
2084 if (freq->zret != Z_STREAM_END) {
2085 unlink_or_warn(freq->tmpfile);
2086 return -1;
2087 }
2088 if (hashcmp(freq->sha1, freq->real_sha1)) {
2089 unlink_or_warn(freq->tmpfile);
2090 return -1;
2091 }
2092 freq->rename =
2093 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2094
2095 return freq->rename;
2096 }
2097
2098 void abort_http_object_request(struct http_object_request *freq)
2099 {
2100 unlink_or_warn(freq->tmpfile);
2101
2102 release_http_object_request(freq);
2103 }
2104
2105 void release_http_object_request(struct http_object_request *freq)
2106 {
2107 if (freq->localfile != -1) {
2108 close(freq->localfile);
2109 freq->localfile = -1;
2110 }
2111 if (freq->url != NULL) {
2112 free(freq->url);
2113 freq->url = NULL;
2114 }
2115 if (freq->slot != NULL) {
2116 freq->slot->callback_func = NULL;
2117 freq->slot->callback_data = NULL;
2118 release_active_slot(freq->slot);
2119 freq->slot = NULL;
2120 }
2121 }
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