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
14static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
15#if LIBCURL_VERSION_NUM >= 0x070a08
16long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
17#else
18long int git_curl_ipresolve;
19#endif
20int active_requests;
21int http_is_verbose;
22size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
23
24#if LIBCURL_VERSION_NUM >= 0x070a06
25#define LIBCURL_CAN_HANDLE_AUTH_ANY
26#endif
27
28static int min_curl_sessions = 1;
29static int curl_session_count;
30#ifdef USE_CURL_MULTI
31static int max_requests = -1;
32static CURLM *curlm;
33#endif
34#ifndef NO_CURL_EASY_DUPHANDLE
35static CURL *curl_default;
36#endif
37
38#define PREV_BUF_SIZE 4096
39
40char curl_errorstr[CURL_ERROR_SIZE];
41
42static int curl_ssl_verify = -1;
43static int curl_ssl_try;
44static const char *ssl_cert;
45static const char *ssl_cipherlist;
46static const char *ssl_version;
47static struct {
48 const char *name;
49 long ssl_version;
50} sslversions[] = {
51 { "sslv2", CURL_SSLVERSION_SSLv2 },
52 { "sslv3", CURL_SSLVERSION_SSLv3 },
53 { "tlsv1", CURL_SSLVERSION_TLSv1 },
54#if LIBCURL_VERSION_NUM >= 0x072200
55 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
56 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
57 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
58#endif
59};
60#if LIBCURL_VERSION_NUM >= 0x070903
61static const char *ssl_key;
62#endif
63#if LIBCURL_VERSION_NUM >= 0x070908
64static const char *ssl_capath;
65#endif
66#if LIBCURL_VERSION_NUM >= 0x072c00
67static const char *ssl_pinnedkey;
68#endif
69static const char *ssl_cainfo;
70static long curl_low_speed_limit = -1;
71static long curl_low_speed_time = -1;
72static int curl_ftp_no_epsv;
73static const char *curl_http_proxy;
74static const char *curl_no_proxy;
75static const char *http_proxy_authmethod;
76static struct {
77 const char *name;
78 long curlauth_param;
79} proxy_authmethods[] = {
80 { "basic", CURLAUTH_BASIC },
81 { "digest", CURLAUTH_DIGEST },
82 { "negotiate", CURLAUTH_GSSNEGOTIATE },
83 { "ntlm", CURLAUTH_NTLM },
84#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
85 { "anyauth", CURLAUTH_ANY },
86#endif
87 /*
88 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
89 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
90 * here, too
91 */
92};
93#if LIBCURL_VERSION_NUM >= 0x071600
94static const char *curl_deleg;
95static struct {
96 const char *name;
97 long curl_deleg_param;
98} curl_deleg_levels[] = {
99 { "none", CURLGSSAPI_DELEGATION_NONE },
100 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
101 { "always", CURLGSSAPI_DELEGATION_FLAG },
102};
103#endif
104
105static struct credential proxy_auth = CREDENTIAL_INIT;
106static const char *curl_proxyuserpwd;
107static const char *curl_cookie_file;
108static int curl_save_cookies;
109struct credential http_auth = CREDENTIAL_INIT;
110static int http_proactive_auth;
111static const char *user_agent;
112static int curl_empty_auth = -1;
113
114enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
115
116#if LIBCURL_VERSION_NUM >= 0x071700
117/* Use CURLOPT_KEYPASSWD as is */
118#elif LIBCURL_VERSION_NUM >= 0x070903
119#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
120#else
121#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
122#endif
123
124static struct credential cert_auth = CREDENTIAL_INIT;
125static int ssl_cert_password_required;
126#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
127static unsigned long http_auth_methods = CURLAUTH_ANY;
128static int http_auth_methods_restricted;
129/* Modes for which empty_auth cannot actually help us. */
130static unsigned long empty_auth_useless =
131 CURLAUTH_BASIC
132#ifdef CURLAUTH_DIGEST_IE
133 | CURLAUTH_DIGEST_IE
134#endif
135 | CURLAUTH_DIGEST;
136#endif
137
138static struct curl_slist *pragma_header;
139static struct curl_slist *no_pragma_header;
140static struct curl_slist *extra_http_headers;
141
142static struct active_request_slot *active_queue_head;
143
144static char *cached_accept_language;
145
146size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
147{
148 size_t size = eltsize * nmemb;
149 struct buffer *buffer = buffer_;
150
151 if (size > buffer->buf.len - buffer->posn)
152 size = buffer->buf.len - buffer->posn;
153 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
154 buffer->posn += size;
155
156 return size;
157}
158
159#ifndef NO_CURL_IOCTL
160curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
161{
162 struct buffer *buffer = clientp;
163
164 switch (cmd) {
165 case CURLIOCMD_NOP:
166 return CURLIOE_OK;
167
168 case CURLIOCMD_RESTARTREAD:
169 buffer->posn = 0;
170 return CURLIOE_OK;
171
172 default:
173 return CURLIOE_UNKNOWNCMD;
174 }
175}
176#endif
177
178size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
179{
180 size_t size = eltsize * nmemb;
181 struct strbuf *buffer = buffer_;
182
183 strbuf_add(buffer, ptr, size);
184 return size;
185}
186
187size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
188{
189 return eltsize * nmemb;
190}
191
192static void closedown_active_slot(struct active_request_slot *slot)
193{
194 active_requests--;
195 slot->in_use = 0;
196}
197
198static void finish_active_slot(struct active_request_slot *slot)
199{
200 closedown_active_slot(slot);
201 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
202
203 if (slot->finished != NULL)
204 (*slot->finished) = 1;
205
206 /* Store slot results so they can be read after the slot is reused */
207 if (slot->results != NULL) {
208 slot->results->curl_result = slot->curl_result;
209 slot->results->http_code = slot->http_code;
210#if LIBCURL_VERSION_NUM >= 0x070a08
211 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
212 &slot->results->auth_avail);
213#else
214 slot->results->auth_avail = 0;
215#endif
216
217 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
218 &slot->results->http_connectcode);
219 }
220
221 /* Run callback if appropriate */
222 if (slot->callback_func != NULL)
223 slot->callback_func(slot->callback_data);
224}
225
226static void xmulti_remove_handle(struct active_request_slot *slot)
227{
228#ifdef USE_CURL_MULTI
229 curl_multi_remove_handle(curlm, slot->curl);
230#endif
231}
232
233#ifdef USE_CURL_MULTI
234static void process_curl_messages(void)
235{
236 int num_messages;
237 struct active_request_slot *slot;
238 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
239
240 while (curl_message != NULL) {
241 if (curl_message->msg == CURLMSG_DONE) {
242 int curl_result = curl_message->data.result;
243 slot = active_queue_head;
244 while (slot != NULL &&
245 slot->curl != curl_message->easy_handle)
246 slot = slot->next;
247 if (slot != NULL) {
248 xmulti_remove_handle(slot);
249 slot->curl_result = curl_result;
250 finish_active_slot(slot);
251 } else {
252 fprintf(stderr, "Received DONE message for unknown request!\n");
253 }
254 } else {
255 fprintf(stderr, "Unknown CURL message received: %d\n",
256 (int)curl_message->msg);
257 }
258 curl_message = curl_multi_info_read(curlm, &num_messages);
259 }
260}
261#endif
262
263static int http_options(const char *var, const char *value, void *cb)
264{
265 if (!strcmp("http.sslverify", var)) {
266 curl_ssl_verify = git_config_bool(var, value);
267 return 0;
268 }
269 if (!strcmp("http.sslcipherlist", var))
270 return git_config_string(&ssl_cipherlist, var, value);
271 if (!strcmp("http.sslversion", var))
272 return git_config_string(&ssl_version, var, value);
273 if (!strcmp("http.sslcert", var))
274 return git_config_string(&ssl_cert, var, value);
275#if LIBCURL_VERSION_NUM >= 0x070903
276 if (!strcmp("http.sslkey", var))
277 return git_config_string(&ssl_key, var, value);
278#endif
279#if LIBCURL_VERSION_NUM >= 0x070908
280 if (!strcmp("http.sslcapath", var))
281 return git_config_pathname(&ssl_capath, var, value);
282#endif
283 if (!strcmp("http.sslcainfo", var))
284 return git_config_pathname(&ssl_cainfo, var, value);
285 if (!strcmp("http.sslcertpasswordprotected", var)) {
286 ssl_cert_password_required = git_config_bool(var, value);
287 return 0;
288 }
289 if (!strcmp("http.ssltry", var)) {
290 curl_ssl_try = git_config_bool(var, value);
291 return 0;
292 }
293 if (!strcmp("http.minsessions", var)) {
294 min_curl_sessions = git_config_int(var, value);
295#ifndef USE_CURL_MULTI
296 if (min_curl_sessions > 1)
297 min_curl_sessions = 1;
298#endif
299 return 0;
300 }
301#ifdef USE_CURL_MULTI
302 if (!strcmp("http.maxrequests", var)) {
303 max_requests = git_config_int(var, value);
304 return 0;
305 }
306#endif
307 if (!strcmp("http.lowspeedlimit", var)) {
308 curl_low_speed_limit = (long)git_config_int(var, value);
309 return 0;
310 }
311 if (!strcmp("http.lowspeedtime", var)) {
312 curl_low_speed_time = (long)git_config_int(var, value);
313 return 0;
314 }
315
316 if (!strcmp("http.noepsv", var)) {
317 curl_ftp_no_epsv = git_config_bool(var, value);
318 return 0;
319 }
320 if (!strcmp("http.proxy", var))
321 return git_config_string(&curl_http_proxy, var, value);
322
323 if (!strcmp("http.proxyauthmethod", var))
324 return git_config_string(&http_proxy_authmethod, var, value);
325
326 if (!strcmp("http.cookiefile", var))
327 return git_config_pathname(&curl_cookie_file, var, value);
328 if (!strcmp("http.savecookies", var)) {
329 curl_save_cookies = git_config_bool(var, value);
330 return 0;
331 }
332
333 if (!strcmp("http.postbuffer", var)) {
334 http_post_buffer = git_config_int(var, value);
335 if (http_post_buffer < LARGE_PACKET_MAX)
336 http_post_buffer = LARGE_PACKET_MAX;
337 return 0;
338 }
339
340 if (!strcmp("http.useragent", var))
341 return git_config_string(&user_agent, var, value);
342
343 if (!strcmp("http.emptyauth", var)) {
344 if (value && !strcmp("auto", value))
345 curl_empty_auth = -1;
346 else
347 curl_empty_auth = git_config_bool(var, value);
348 return 0;
349 }
350
351 if (!strcmp("http.delegation", var)) {
352#if LIBCURL_VERSION_NUM >= 0x071600
353 return git_config_string(&curl_deleg, var, value);
354#else
355 warning(_("Delegation control is not supported with cURL < 7.22.0"));
356 return 0;
357#endif
358 }
359
360 if (!strcmp("http.pinnedpubkey", var)) {
361#if LIBCURL_VERSION_NUM >= 0x072c00
362 return git_config_pathname(&ssl_pinnedkey, var, value);
363#else
364 warning(_("Public key pinning not supported with cURL < 7.44.0"));
365 return 0;
366#endif
367 }
368
369 if (!strcmp("http.extraheader", var)) {
370 if (!value) {
371 return config_error_nonbool(var);
372 } else if (!*value) {
373 curl_slist_free_all(extra_http_headers);
374 extra_http_headers = NULL;
375 } else {
376 extra_http_headers =
377 curl_slist_append(extra_http_headers, value);
378 }
379 return 0;
380 }
381
382 if (!strcmp("http.followredirects", var)) {
383 if (value && !strcmp(value, "initial"))
384 http_follow_config = HTTP_FOLLOW_INITIAL;
385 else if (git_config_bool(var, value))
386 http_follow_config = HTTP_FOLLOW_ALWAYS;
387 else
388 http_follow_config = HTTP_FOLLOW_NONE;
389 return 0;
390 }
391
392 /* Fall back on the default ones */
393 return git_default_config(var, value, cb);
394}
395
396static int curl_empty_auth_enabled(void)
397{
398 if (curl_empty_auth >= 0)
399 return curl_empty_auth;
400
401#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
402 /*
403 * Our libcurl is too old to do AUTH_ANY in the first place;
404 * just default to turning the feature off.
405 */
406#else
407 /*
408 * In the automatic case, kick in the empty-auth
409 * hack as long as we would potentially try some
410 * method more exotic than "Basic" or "Digest".
411 *
412 * But only do this when this is our second or
413 * subsequent request, as by then we know what
414 * methods are available.
415 */
416 if (http_auth_methods_restricted &&
417 (http_auth_methods & ~empty_auth_useless))
418 return 1;
419#endif
420 return 0;
421}
422
423static void init_curl_http_auth(CURL *result)
424{
425 if (!http_auth.username || !*http_auth.username) {
426 if (curl_empty_auth_enabled())
427 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
428 return;
429 }
430
431 credential_fill(&http_auth);
432
433#if LIBCURL_VERSION_NUM >= 0x071301
434 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
435 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
436#else
437 {
438 static struct strbuf up = STRBUF_INIT;
439 /*
440 * Note that we assume we only ever have a single set of
441 * credentials in a given program run, so we do not have
442 * to worry about updating this buffer, only setting its
443 * initial value.
444 */
445 if (!up.len)
446 strbuf_addf(&up, "%s:%s",
447 http_auth.username, http_auth.password);
448 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
449 }
450#endif
451}
452
453/* *var must be free-able */
454static void var_override(const char **var, char *value)
455{
456 if (value) {
457 free((void *)*var);
458 *var = xstrdup(value);
459 }
460}
461
462static void set_proxyauth_name_password(CURL *result)
463{
464#if LIBCURL_VERSION_NUM >= 0x071301
465 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
466 proxy_auth.username);
467 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
468 proxy_auth.password);
469#else
470 struct strbuf s = STRBUF_INIT;
471
472 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
473 strbuf_addch(&s, ':');
474 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
475 curl_proxyuserpwd = strbuf_detach(&s, NULL);
476 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
477#endif
478}
479
480static void init_curl_proxy_auth(CURL *result)
481{
482 if (proxy_auth.username) {
483 if (!proxy_auth.password)
484 credential_fill(&proxy_auth);
485 set_proxyauth_name_password(result);
486 }
487
488 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
489
490#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
491 if (http_proxy_authmethod) {
492 int i;
493 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
494 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
495 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
496 proxy_authmethods[i].curlauth_param);
497 break;
498 }
499 }
500 if (i == ARRAY_SIZE(proxy_authmethods)) {
501 warning("unsupported proxy authentication method %s: using anyauth",
502 http_proxy_authmethod);
503 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
504 }
505 }
506 else
507 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
508#endif
509}
510
511static int has_cert_password(void)
512{
513 if (ssl_cert == NULL || ssl_cert_password_required != 1)
514 return 0;
515 if (!cert_auth.password) {
516 cert_auth.protocol = xstrdup("cert");
517 cert_auth.username = xstrdup("");
518 cert_auth.path = xstrdup(ssl_cert);
519 credential_fill(&cert_auth);
520 }
521 return 1;
522}
523
524#if LIBCURL_VERSION_NUM >= 0x071900
525static void set_curl_keepalive(CURL *c)
526{
527 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
528}
529
530#elif LIBCURL_VERSION_NUM >= 0x071000
531static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
532{
533 int ka = 1;
534 int rc;
535 socklen_t len = (socklen_t)sizeof(ka);
536
537 if (type != CURLSOCKTYPE_IPCXN)
538 return 0;
539
540 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
541 if (rc < 0)
542 warning_errno("unable to set SO_KEEPALIVE on socket");
543
544 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
545}
546
547static void set_curl_keepalive(CURL *c)
548{
549 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
550}
551
552#else
553static void set_curl_keepalive(CURL *c)
554{
555 /* not supported on older curl versions */
556}
557#endif
558
559static void redact_sensitive_header(struct strbuf *header)
560{
561 const char *sensitive_header;
562
563 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
564 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
565 /* The first token is the type, which is OK to log */
566 while (isspace(*sensitive_header))
567 sensitive_header++;
568 while (*sensitive_header && !isspace(*sensitive_header))
569 sensitive_header++;
570 /* Everything else is opaque and possibly sensitive */
571 strbuf_setlen(header, sensitive_header - header->buf);
572 strbuf_addstr(header, " <redacted>");
573 }
574}
575
576static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
577{
578 struct strbuf out = STRBUF_INIT;
579 struct strbuf **headers, **header;
580
581 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
582 text, (long)size, (long)size);
583 trace_strbuf(&trace_curl, &out);
584 strbuf_reset(&out);
585 strbuf_add(&out, ptr, size);
586 headers = strbuf_split_max(&out, '\n', 0);
587
588 for (header = headers; *header; header++) {
589 if (hide_sensitive_header)
590 redact_sensitive_header(*header);
591 strbuf_insert((*header), 0, text, strlen(text));
592 strbuf_insert((*header), strlen(text), ": ", 2);
593 strbuf_rtrim((*header));
594 strbuf_addch((*header), '\n');
595 trace_strbuf(&trace_curl, (*header));
596 }
597 strbuf_list_free(headers);
598 strbuf_release(&out);
599}
600
601static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
602{
603 size_t i;
604 struct strbuf out = STRBUF_INIT;
605 unsigned int width = 60;
606
607 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
608 text, (long)size, (long)size);
609 trace_strbuf(&trace_curl, &out);
610
611 for (i = 0; i < size; i += width) {
612 size_t w;
613
614 strbuf_reset(&out);
615 strbuf_addf(&out, "%s: ", text);
616 for (w = 0; (w < width) && (i + w < size); w++) {
617 unsigned char ch = ptr[i + w];
618
619 strbuf_addch(&out,
620 (ch >= 0x20) && (ch < 0x80)
621 ? ch : '.');
622 }
623 strbuf_addch(&out, '\n');
624 trace_strbuf(&trace_curl, &out);
625 }
626 strbuf_release(&out);
627}
628
629static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
630{
631 const char *text;
632 enum { NO_FILTER = 0, DO_FILTER = 1 };
633
634 switch (type) {
635 case CURLINFO_TEXT:
636 trace_printf_key(&trace_curl, "== Info: %s", data);
637 default: /* we ignore unknown types by default */
638 return 0;
639
640 case CURLINFO_HEADER_OUT:
641 text = "=> Send header";
642 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
643 break;
644 case CURLINFO_DATA_OUT:
645 text = "=> Send data";
646 curl_dump_data(text, (unsigned char *)data, size);
647 break;
648 case CURLINFO_SSL_DATA_OUT:
649 text = "=> Send SSL data";
650 curl_dump_data(text, (unsigned char *)data, size);
651 break;
652 case CURLINFO_HEADER_IN:
653 text = "<= Recv header";
654 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
655 break;
656 case CURLINFO_DATA_IN:
657 text = "<= Recv data";
658 curl_dump_data(text, (unsigned char *)data, size);
659 break;
660 case CURLINFO_SSL_DATA_IN:
661 text = "<= Recv SSL data";
662 curl_dump_data(text, (unsigned char *)data, size);
663 break;
664 }
665 return 0;
666}
667
668void setup_curl_trace(CURL *handle)
669{
670 if (!trace_want(&trace_curl))
671 return;
672 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
673 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
674 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
675}
676
677static long get_curl_allowed_protocols(int from_user)
678{
679 long allowed_protocols = 0;
680
681 if (is_transport_allowed("http", from_user))
682 allowed_protocols |= CURLPROTO_HTTP;
683 if (is_transport_allowed("https", from_user))
684 allowed_protocols |= CURLPROTO_HTTPS;
685 if (is_transport_allowed("ftp", from_user))
686 allowed_protocols |= CURLPROTO_FTP;
687 if (is_transport_allowed("ftps", from_user))
688 allowed_protocols |= CURLPROTO_FTPS;
689
690 return allowed_protocols;
691}
692
693static CURL *get_curl_handle(void)
694{
695 CURL *result = curl_easy_init();
696
697 if (!result)
698 die("curl_easy_init failed");
699
700 if (!curl_ssl_verify) {
701 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
702 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
703 } else {
704 /* Verify authenticity of the peer's certificate */
705 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
706 /* The name in the cert must match whom we tried to connect */
707 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
708 }
709
710#if LIBCURL_VERSION_NUM >= 0x070907
711 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
712#endif
713#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
714 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
715#endif
716
717#if LIBCURL_VERSION_NUM >= 0x071600
718 if (curl_deleg) {
719 int i;
720 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
721 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
722 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
723 curl_deleg_levels[i].curl_deleg_param);
724 break;
725 }
726 }
727 if (i == ARRAY_SIZE(curl_deleg_levels))
728 warning("Unknown delegation method '%s': using default",
729 curl_deleg);
730 }
731#endif
732
733 if (http_proactive_auth)
734 init_curl_http_auth(result);
735
736 if (getenv("GIT_SSL_VERSION"))
737 ssl_version = getenv("GIT_SSL_VERSION");
738 if (ssl_version && *ssl_version) {
739 int i;
740 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
741 if (!strcmp(ssl_version, sslversions[i].name)) {
742 curl_easy_setopt(result, CURLOPT_SSLVERSION,
743 sslversions[i].ssl_version);
744 break;
745 }
746 }
747 if (i == ARRAY_SIZE(sslversions))
748 warning("unsupported ssl version %s: using default",
749 ssl_version);
750 }
751
752 if (getenv("GIT_SSL_CIPHER_LIST"))
753 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
754 if (ssl_cipherlist != NULL && *ssl_cipherlist)
755 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
756 ssl_cipherlist);
757
758 if (ssl_cert != NULL)
759 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
760 if (has_cert_password())
761 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
762#if LIBCURL_VERSION_NUM >= 0x070903
763 if (ssl_key != NULL)
764 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
765#endif
766#if LIBCURL_VERSION_NUM >= 0x070908
767 if (ssl_capath != NULL)
768 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
769#endif
770#if LIBCURL_VERSION_NUM >= 0x072c00
771 if (ssl_pinnedkey != NULL)
772 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
773#endif
774 if (ssl_cainfo != NULL)
775 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
776
777 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
778 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
779 curl_low_speed_limit);
780 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
781 curl_low_speed_time);
782 }
783
784 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
785#if LIBCURL_VERSION_NUM >= 0x071301
786 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
787#elif LIBCURL_VERSION_NUM >= 0x071101
788 curl_easy_setopt(result, CURLOPT_POST301, 1);
789#endif
790#if LIBCURL_VERSION_NUM >= 0x071304
791 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
792 get_curl_allowed_protocols(0));
793 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
794 get_curl_allowed_protocols(-1));
795#else
796 warning("protocol restrictions not applied to curl redirects because\n"
797 "your curl version is too old (>= 7.19.4)");
798#endif
799 if (getenv("GIT_CURL_VERBOSE"))
800 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
801 setup_curl_trace(result);
802
803 curl_easy_setopt(result, CURLOPT_USERAGENT,
804 user_agent ? user_agent : git_user_agent());
805
806 if (curl_ftp_no_epsv)
807 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
808
809#ifdef CURLOPT_USE_SSL
810 if (curl_ssl_try)
811 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
812#endif
813
814 /*
815 * CURL also examines these variables as a fallback; but we need to query
816 * them here in order to decide whether to prompt for missing password (cf.
817 * init_curl_proxy_auth()).
818 *
819 * Unlike many other common environment variables, these are historically
820 * lowercase only. It appears that CURL did not know this and implemented
821 * only uppercase variants, which was later corrected to take both - with
822 * the exception of http_proxy, which is lowercase only also in CURL. As
823 * the lowercase versions are the historical quasi-standard, they take
824 * precedence here, as in CURL.
825 */
826 if (!curl_http_proxy) {
827 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
828 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
829 var_override(&curl_http_proxy, getenv("https_proxy"));
830 } else {
831 var_override(&curl_http_proxy, getenv("http_proxy"));
832 }
833 if (!curl_http_proxy) {
834 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
835 var_override(&curl_http_proxy, getenv("all_proxy"));
836 }
837 }
838
839 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
840 /*
841 * Handle case with the empty http.proxy value here to keep
842 * common code clean.
843 * NB: empty option disables proxying at all.
844 */
845 curl_easy_setopt(result, CURLOPT_PROXY, "");
846 } else if (curl_http_proxy) {
847#if LIBCURL_VERSION_NUM >= 0x071800
848 if (starts_with(curl_http_proxy, "socks5h"))
849 curl_easy_setopt(result,
850 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
851 else if (starts_with(curl_http_proxy, "socks5"))
852 curl_easy_setopt(result,
853 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
854 else if (starts_with(curl_http_proxy, "socks4a"))
855 curl_easy_setopt(result,
856 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
857 else if (starts_with(curl_http_proxy, "socks"))
858 curl_easy_setopt(result,
859 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
860#endif
861 if (strstr(curl_http_proxy, "://"))
862 credential_from_url(&proxy_auth, curl_http_proxy);
863 else {
864 struct strbuf url = STRBUF_INIT;
865 strbuf_addf(&url, "http://%s", curl_http_proxy);
866 credential_from_url(&proxy_auth, url.buf);
867 strbuf_release(&url);
868 }
869
870 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
871#if LIBCURL_VERSION_NUM >= 0x071304
872 var_override(&curl_no_proxy, getenv("NO_PROXY"));
873 var_override(&curl_no_proxy, getenv("no_proxy"));
874 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
875#endif
876 }
877 init_curl_proxy_auth(result);
878
879 set_curl_keepalive(result);
880
881 return result;
882}
883
884static void set_from_env(const char **var, const char *envname)
885{
886 const char *val = getenv(envname);
887 if (val)
888 *var = val;
889}
890
891void http_init(struct remote *remote, const char *url, int proactive_auth)
892{
893 char *low_speed_limit;
894 char *low_speed_time;
895 char *normalized_url;
896 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
897
898 config.section = "http";
899 config.key = NULL;
900 config.collect_fn = http_options;
901 config.cascade_fn = git_default_config;
902 config.cb = NULL;
903
904 http_is_verbose = 0;
905 normalized_url = url_normalize(url, &config.url);
906
907 git_config(urlmatch_config_entry, &config);
908 free(normalized_url);
909
910 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
911 die("curl_global_init failed");
912
913 http_proactive_auth = proactive_auth;
914
915 if (remote && remote->http_proxy)
916 curl_http_proxy = xstrdup(remote->http_proxy);
917
918 if (remote)
919 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
920
921 pragma_header = curl_slist_append(http_copy_default_headers(),
922 "Pragma: no-cache");
923 no_pragma_header = curl_slist_append(http_copy_default_headers(),
924 "Pragma:");
925
926#ifdef USE_CURL_MULTI
927 {
928 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
929 if (http_max_requests != NULL)
930 max_requests = atoi(http_max_requests);
931 }
932
933 curlm = curl_multi_init();
934 if (!curlm)
935 die("curl_multi_init failed");
936#endif
937
938 if (getenv("GIT_SSL_NO_VERIFY"))
939 curl_ssl_verify = 0;
940
941 set_from_env(&ssl_cert, "GIT_SSL_CERT");
942#if LIBCURL_VERSION_NUM >= 0x070903
943 set_from_env(&ssl_key, "GIT_SSL_KEY");
944#endif
945#if LIBCURL_VERSION_NUM >= 0x070908
946 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
947#endif
948 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
949
950 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
951
952 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
953 if (low_speed_limit != NULL)
954 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
955 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
956 if (low_speed_time != NULL)
957 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
958
959 if (curl_ssl_verify == -1)
960 curl_ssl_verify = 1;
961
962 curl_session_count = 0;
963#ifdef USE_CURL_MULTI
964 if (max_requests < 1)
965 max_requests = DEFAULT_MAX_REQUESTS;
966#endif
967
968 if (getenv("GIT_CURL_FTP_NO_EPSV"))
969 curl_ftp_no_epsv = 1;
970
971 if (url) {
972 credential_from_url(&http_auth, url);
973 if (!ssl_cert_password_required &&
974 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
975 starts_with(url, "https://"))
976 ssl_cert_password_required = 1;
977 }
978
979#ifndef NO_CURL_EASY_DUPHANDLE
980 curl_default = get_curl_handle();
981#endif
982}
983
984void http_cleanup(void)
985{
986 struct active_request_slot *slot = active_queue_head;
987
988 while (slot != NULL) {
989 struct active_request_slot *next = slot->next;
990 if (slot->curl != NULL) {
991 xmulti_remove_handle(slot);
992 curl_easy_cleanup(slot->curl);
993 }
994 free(slot);
995 slot = next;
996 }
997 active_queue_head = NULL;
998
999#ifndef NO_CURL_EASY_DUPHANDLE
1000 curl_easy_cleanup(curl_default);
1001#endif
1002
1003#ifdef USE_CURL_MULTI
1004 curl_multi_cleanup(curlm);
1005#endif
1006 curl_global_cleanup();
1007
1008 curl_slist_free_all(extra_http_headers);
1009 extra_http_headers = NULL;
1010
1011 curl_slist_free_all(pragma_header);
1012 pragma_header = NULL;
1013
1014 curl_slist_free_all(no_pragma_header);
1015 no_pragma_header = NULL;
1016
1017 if (curl_http_proxy) {
1018 free((void *)curl_http_proxy);
1019 curl_http_proxy = NULL;
1020 }
1021
1022 if (proxy_auth.password) {
1023 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1024 free(proxy_auth.password);
1025 proxy_auth.password = NULL;
1026 }
1027
1028 free((void *)curl_proxyuserpwd);
1029 curl_proxyuserpwd = NULL;
1030
1031 free((void *)http_proxy_authmethod);
1032 http_proxy_authmethod = NULL;
1033
1034 if (cert_auth.password != NULL) {
1035 memset(cert_auth.password, 0, strlen(cert_auth.password));
1036 free(cert_auth.password);
1037 cert_auth.password = NULL;
1038 }
1039 ssl_cert_password_required = 0;
1040
1041 free(cached_accept_language);
1042 cached_accept_language = NULL;
1043}
1044
1045struct active_request_slot *get_active_slot(void)
1046{
1047 struct active_request_slot *slot = active_queue_head;
1048 struct active_request_slot *newslot;
1049
1050#ifdef USE_CURL_MULTI
1051 int num_transfers;
1052
1053 /* Wait for a slot to open up if the queue is full */
1054 while (active_requests >= max_requests) {
1055 curl_multi_perform(curlm, &num_transfers);
1056 if (num_transfers < active_requests)
1057 process_curl_messages();
1058 }
1059#endif
1060
1061 while (slot != NULL && slot->in_use)
1062 slot = slot->next;
1063
1064 if (slot == NULL) {
1065 newslot = xmalloc(sizeof(*newslot));
1066 newslot->curl = NULL;
1067 newslot->in_use = 0;
1068 newslot->next = NULL;
1069
1070 slot = active_queue_head;
1071 if (slot == NULL) {
1072 active_queue_head = newslot;
1073 } else {
1074 while (slot->next != NULL)
1075 slot = slot->next;
1076 slot->next = newslot;
1077 }
1078 slot = newslot;
1079 }
1080
1081 if (slot->curl == NULL) {
1082#ifdef NO_CURL_EASY_DUPHANDLE
1083 slot->curl = get_curl_handle();
1084#else
1085 slot->curl = curl_easy_duphandle(curl_default);
1086#endif
1087 curl_session_count++;
1088 }
1089
1090 active_requests++;
1091 slot->in_use = 1;
1092 slot->results = NULL;
1093 slot->finished = NULL;
1094 slot->callback_data = NULL;
1095 slot->callback_func = NULL;
1096 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1097 if (curl_save_cookies)
1098 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1099 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1100 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1101 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1102 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1103 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1104 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1105 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1106 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1107 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1108 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1109
1110 /*
1111 * Default following to off unless "ALWAYS" is configured; this gives
1112 * callers a sane starting point, and they can tweak for individual
1113 * HTTP_FOLLOW_* cases themselves.
1114 */
1115 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1116 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1117 else
1118 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1119
1120#if LIBCURL_VERSION_NUM >= 0x070a08
1121 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1122#endif
1123#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1124 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1125#endif
1126 if (http_auth.password || curl_empty_auth_enabled())
1127 init_curl_http_auth(slot->curl);
1128
1129 return slot;
1130}
1131
1132int start_active_slot(struct active_request_slot *slot)
1133{
1134#ifdef USE_CURL_MULTI
1135 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1136 int num_transfers;
1137
1138 if (curlm_result != CURLM_OK &&
1139 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1140 warning("curl_multi_add_handle failed: %s",
1141 curl_multi_strerror(curlm_result));
1142 active_requests--;
1143 slot->in_use = 0;
1144 return 0;
1145 }
1146
1147 /*
1148 * We know there must be something to do, since we just added
1149 * something.
1150 */
1151 curl_multi_perform(curlm, &num_transfers);
1152#endif
1153 return 1;
1154}
1155
1156#ifdef USE_CURL_MULTI
1157struct fill_chain {
1158 void *data;
1159 int (*fill)(void *);
1160 struct fill_chain *next;
1161};
1162
1163static struct fill_chain *fill_cfg;
1164
1165void add_fill_function(void *data, int (*fill)(void *))
1166{
1167 struct fill_chain *new = xmalloc(sizeof(*new));
1168 struct fill_chain **linkp = &fill_cfg;
1169 new->data = data;
1170 new->fill = fill;
1171 new->next = NULL;
1172 while (*linkp)
1173 linkp = &(*linkp)->next;
1174 *linkp = new;
1175}
1176
1177void fill_active_slots(void)
1178{
1179 struct active_request_slot *slot = active_queue_head;
1180
1181 while (active_requests < max_requests) {
1182 struct fill_chain *fill;
1183 for (fill = fill_cfg; fill; fill = fill->next)
1184 if (fill->fill(fill->data))
1185 break;
1186
1187 if (!fill)
1188 break;
1189 }
1190
1191 while (slot != NULL) {
1192 if (!slot->in_use && slot->curl != NULL
1193 && curl_session_count > min_curl_sessions) {
1194 curl_easy_cleanup(slot->curl);
1195 slot->curl = NULL;
1196 curl_session_count--;
1197 }
1198 slot = slot->next;
1199 }
1200}
1201
1202void step_active_slots(void)
1203{
1204 int num_transfers;
1205 CURLMcode curlm_result;
1206
1207 do {
1208 curlm_result = curl_multi_perform(curlm, &num_transfers);
1209 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1210 if (num_transfers < active_requests) {
1211 process_curl_messages();
1212 fill_active_slots();
1213 }
1214}
1215#endif
1216
1217void run_active_slot(struct active_request_slot *slot)
1218{
1219#ifdef USE_CURL_MULTI
1220 fd_set readfds;
1221 fd_set writefds;
1222 fd_set excfds;
1223 int max_fd;
1224 struct timeval select_timeout;
1225 int finished = 0;
1226
1227 slot->finished = &finished;
1228 while (!finished) {
1229 step_active_slots();
1230
1231 if (slot->in_use) {
1232#if LIBCURL_VERSION_NUM >= 0x070f04
1233 long curl_timeout;
1234 curl_multi_timeout(curlm, &curl_timeout);
1235 if (curl_timeout == 0) {
1236 continue;
1237 } else if (curl_timeout == -1) {
1238 select_timeout.tv_sec = 0;
1239 select_timeout.tv_usec = 50000;
1240 } else {
1241 select_timeout.tv_sec = curl_timeout / 1000;
1242 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1243 }
1244#else
1245 select_timeout.tv_sec = 0;
1246 select_timeout.tv_usec = 50000;
1247#endif
1248
1249 max_fd = -1;
1250 FD_ZERO(&readfds);
1251 FD_ZERO(&writefds);
1252 FD_ZERO(&excfds);
1253 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1254
1255 /*
1256 * It can happen that curl_multi_timeout returns a pathologically
1257 * long timeout when curl_multi_fdset returns no file descriptors
1258 * to read. See commit message for more details.
1259 */
1260 if (max_fd < 0 &&
1261 (select_timeout.tv_sec > 0 ||
1262 select_timeout.tv_usec > 50000)) {
1263 select_timeout.tv_sec = 0;
1264 select_timeout.tv_usec = 50000;
1265 }
1266
1267 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1268 }
1269 }
1270#else
1271 while (slot->in_use) {
1272 slot->curl_result = curl_easy_perform(slot->curl);
1273 finish_active_slot(slot);
1274 }
1275#endif
1276}
1277
1278static void release_active_slot(struct active_request_slot *slot)
1279{
1280 closedown_active_slot(slot);
1281 if (slot->curl) {
1282 xmulti_remove_handle(slot);
1283 if (curl_session_count > min_curl_sessions) {
1284 curl_easy_cleanup(slot->curl);
1285 slot->curl = NULL;
1286 curl_session_count--;
1287 }
1288 }
1289#ifdef USE_CURL_MULTI
1290 fill_active_slots();
1291#endif
1292}
1293
1294void finish_all_active_slots(void)
1295{
1296 struct active_request_slot *slot = active_queue_head;
1297
1298 while (slot != NULL)
1299 if (slot->in_use) {
1300 run_active_slot(slot);
1301 slot = active_queue_head;
1302 } else {
1303 slot = slot->next;
1304 }
1305}
1306
1307/* Helpers for modifying and creating URLs */
1308static inline int needs_quote(int ch)
1309{
1310 if (((ch >= 'A') && (ch <= 'Z'))
1311 || ((ch >= 'a') && (ch <= 'z'))
1312 || ((ch >= '0') && (ch <= '9'))
1313 || (ch == '/')
1314 || (ch == '-')
1315 || (ch == '.'))
1316 return 0;
1317 return 1;
1318}
1319
1320static char *quote_ref_url(const char *base, const char *ref)
1321{
1322 struct strbuf buf = STRBUF_INIT;
1323 const char *cp;
1324 int ch;
1325
1326 end_url_with_slash(&buf, base);
1327
1328 for (cp = ref; (ch = *cp) != 0; cp++)
1329 if (needs_quote(ch))
1330 strbuf_addf(&buf, "%%%02x", ch);
1331 else
1332 strbuf_addch(&buf, *cp);
1333
1334 return strbuf_detach(&buf, NULL);
1335}
1336
1337void append_remote_object_url(struct strbuf *buf, const char *url,
1338 const char *hex,
1339 int only_two_digit_prefix)
1340{
1341 end_url_with_slash(buf, url);
1342
1343 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1344 if (!only_two_digit_prefix)
1345 strbuf_addstr(buf, hex + 2);
1346}
1347
1348char *get_remote_object_url(const char *url, const char *hex,
1349 int only_two_digit_prefix)
1350{
1351 struct strbuf buf = STRBUF_INIT;
1352 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1353 return strbuf_detach(&buf, NULL);
1354}
1355
1356static int handle_curl_result(struct slot_results *results)
1357{
1358 /*
1359 * If we see a failing http code with CURLE_OK, we have turned off
1360 * FAILONERROR (to keep the server's custom error response), and should
1361 * translate the code into failure here.
1362 *
1363 * Likewise, if we see a redirect (30x code), that means we turned off
1364 * redirect-following, and we should treat the result as an error.
1365 */
1366 if (results->curl_result == CURLE_OK &&
1367 results->http_code >= 300) {
1368 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1369 /*
1370 * Normally curl will already have put the "reason phrase"
1371 * from the server into curl_errorstr; unfortunately without
1372 * FAILONERROR it is lost, so we can give only the numeric
1373 * status code.
1374 */
1375 snprintf(curl_errorstr, sizeof(curl_errorstr),
1376 "The requested URL returned error: %ld",
1377 results->http_code);
1378 }
1379
1380 if (results->curl_result == CURLE_OK) {
1381 credential_approve(&http_auth);
1382 if (proxy_auth.password)
1383 credential_approve(&proxy_auth);
1384 return HTTP_OK;
1385 } else if (missing_target(results))
1386 return HTTP_MISSING_TARGET;
1387 else if (results->http_code == 401) {
1388 if (http_auth.username && http_auth.password) {
1389 credential_reject(&http_auth);
1390 return HTTP_NOAUTH;
1391 } else {
1392#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1393 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1394 if (results->auth_avail) {
1395 http_auth_methods &= results->auth_avail;
1396 http_auth_methods_restricted = 1;
1397 }
1398#endif
1399 return HTTP_REAUTH;
1400 }
1401 } else {
1402 if (results->http_connectcode == 407)
1403 credential_reject(&proxy_auth);
1404#if LIBCURL_VERSION_NUM >= 0x070c00
1405 if (!curl_errorstr[0])
1406 strlcpy(curl_errorstr,
1407 curl_easy_strerror(results->curl_result),
1408 sizeof(curl_errorstr));
1409#endif
1410 return HTTP_ERROR;
1411 }
1412}
1413
1414int run_one_slot(struct active_request_slot *slot,
1415 struct slot_results *results)
1416{
1417 slot->results = results;
1418 if (!start_active_slot(slot)) {
1419 snprintf(curl_errorstr, sizeof(curl_errorstr),
1420 "failed to start HTTP request");
1421 return HTTP_START_FAILED;
1422 }
1423
1424 run_active_slot(slot);
1425 return handle_curl_result(results);
1426}
1427
1428struct curl_slist *http_copy_default_headers(void)
1429{
1430 struct curl_slist *headers = NULL, *h;
1431
1432 for (h = extra_http_headers; h; h = h->next)
1433 headers = curl_slist_append(headers, h->data);
1434
1435 return headers;
1436}
1437
1438static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1439{
1440 char *ptr;
1441 CURLcode ret;
1442
1443 strbuf_reset(buf);
1444 ret = curl_easy_getinfo(curl, info, &ptr);
1445 if (!ret && ptr)
1446 strbuf_addstr(buf, ptr);
1447 return ret;
1448}
1449
1450/*
1451 * Check for and extract a content-type parameter. "raw"
1452 * should be positioned at the start of the potential
1453 * parameter, with any whitespace already removed.
1454 *
1455 * "name" is the name of the parameter. The value is appended
1456 * to "out".
1457 */
1458static int extract_param(const char *raw, const char *name,
1459 struct strbuf *out)
1460{
1461 size_t len = strlen(name);
1462
1463 if (strncasecmp(raw, name, len))
1464 return -1;
1465 raw += len;
1466
1467 if (*raw != '=')
1468 return -1;
1469 raw++;
1470
1471 while (*raw && !isspace(*raw) && *raw != ';')
1472 strbuf_addch(out, *raw++);
1473 return 0;
1474}
1475
1476/*
1477 * Extract a normalized version of the content type, with any
1478 * spaces suppressed, all letters lowercased, and no trailing ";"
1479 * or parameters.
1480 *
1481 * Note that we will silently remove even invalid whitespace. For
1482 * example, "text / plain" is specifically forbidden by RFC 2616,
1483 * but "text/plain" is the only reasonable output, and this keeps
1484 * our code simple.
1485 *
1486 * If the "charset" argument is not NULL, store the value of any
1487 * charset parameter there.
1488 *
1489 * Example:
1490 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1491 * "text / plain" -> "text/plain"
1492 */
1493static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1494 struct strbuf *charset)
1495{
1496 const char *p;
1497
1498 strbuf_reset(type);
1499 strbuf_grow(type, raw->len);
1500 for (p = raw->buf; *p; p++) {
1501 if (isspace(*p))
1502 continue;
1503 if (*p == ';') {
1504 p++;
1505 break;
1506 }
1507 strbuf_addch(type, tolower(*p));
1508 }
1509
1510 if (!charset)
1511 return;
1512
1513 strbuf_reset(charset);
1514 while (*p) {
1515 while (isspace(*p) || *p == ';')
1516 p++;
1517 if (!extract_param(p, "charset", charset))
1518 return;
1519 while (*p && !isspace(*p))
1520 p++;
1521 }
1522
1523 if (!charset->len && starts_with(type->buf, "text/"))
1524 strbuf_addstr(charset, "ISO-8859-1");
1525}
1526
1527static void write_accept_language(struct strbuf *buf)
1528{
1529 /*
1530 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1531 * that, q-value will be smaller than 0.001, the minimum q-value the
1532 * HTTP specification allows. See
1533 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1534 */
1535 const int MAX_DECIMAL_PLACES = 3;
1536 const int MAX_LANGUAGE_TAGS = 1000;
1537 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1538 char **language_tags = NULL;
1539 int num_langs = 0;
1540 const char *s = get_preferred_languages();
1541 int i;
1542 struct strbuf tag = STRBUF_INIT;
1543
1544 /* Don't add Accept-Language header if no language is preferred. */
1545 if (!s)
1546 return;
1547
1548 /*
1549 * Split the colon-separated string of preferred languages into
1550 * language_tags array.
1551 */
1552 do {
1553 /* collect language tag */
1554 for (; *s && (isalnum(*s) || *s == '_'); s++)
1555 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1556
1557 /* skip .codeset, @modifier and any other unnecessary parts */
1558 while (*s && *s != ':')
1559 s++;
1560
1561 if (tag.len) {
1562 num_langs++;
1563 REALLOC_ARRAY(language_tags, num_langs);
1564 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1565 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1566 break;
1567 }
1568 } while (*s++);
1569
1570 /* write Accept-Language header into buf */
1571 if (num_langs) {
1572 int last_buf_len = 0;
1573 int max_q;
1574 int decimal_places;
1575 char q_format[32];
1576
1577 /* add '*' */
1578 REALLOC_ARRAY(language_tags, num_langs + 1);
1579 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1580
1581 /* compute decimal_places */
1582 for (max_q = 1, decimal_places = 0;
1583 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1584 decimal_places++, max_q *= 10)
1585 ;
1586
1587 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1588
1589 strbuf_addstr(buf, "Accept-Language: ");
1590
1591 for (i = 0; i < num_langs; i++) {
1592 if (i > 0)
1593 strbuf_addstr(buf, ", ");
1594
1595 strbuf_addstr(buf, language_tags[i]);
1596
1597 if (i > 0)
1598 strbuf_addf(buf, q_format, max_q - i);
1599
1600 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1601 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1602 break;
1603 }
1604
1605 last_buf_len = buf->len;
1606 }
1607 }
1608
1609 /* free language tags -- last one is a static '*' */
1610 for (i = 0; i < num_langs - 1; i++)
1611 free(language_tags[i]);
1612 free(language_tags);
1613}
1614
1615/*
1616 * Get an Accept-Language header which indicates user's preferred languages.
1617 *
1618 * Examples:
1619 * LANGUAGE= -> ""
1620 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1621 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1622 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1623 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1624 * LANGUAGE= LANG=C -> ""
1625 */
1626static const char *get_accept_language(void)
1627{
1628 if (!cached_accept_language) {
1629 struct strbuf buf = STRBUF_INIT;
1630 write_accept_language(&buf);
1631 if (buf.len > 0)
1632 cached_accept_language = strbuf_detach(&buf, NULL);
1633 }
1634
1635 return cached_accept_language;
1636}
1637
1638static void http_opt_request_remainder(CURL *curl, off_t pos)
1639{
1640 char buf[128];
1641 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1642 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1643}
1644
1645/* http_request() targets */
1646#define HTTP_REQUEST_STRBUF 0
1647#define HTTP_REQUEST_FILE 1
1648
1649static int http_request(const char *url,
1650 void *result, int target,
1651 const struct http_get_options *options)
1652{
1653 struct active_request_slot *slot;
1654 struct slot_results results;
1655 struct curl_slist *headers = http_copy_default_headers();
1656 struct strbuf buf = STRBUF_INIT;
1657 const char *accept_language;
1658 int ret;
1659
1660 slot = get_active_slot();
1661 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1662
1663 if (result == NULL) {
1664 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1665 } else {
1666 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1667 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1668
1669 if (target == HTTP_REQUEST_FILE) {
1670 off_t posn = ftello(result);
1671 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1672 fwrite);
1673 if (posn > 0)
1674 http_opt_request_remainder(slot->curl, posn);
1675 } else
1676 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1677 fwrite_buffer);
1678 }
1679
1680 accept_language = get_accept_language();
1681
1682 if (accept_language)
1683 headers = curl_slist_append(headers, accept_language);
1684
1685 strbuf_addstr(&buf, "Pragma:");
1686 if (options && options->no_cache)
1687 strbuf_addstr(&buf, " no-cache");
1688 if (options && options->keep_error)
1689 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1690 if (options && options->initial_request &&
1691 http_follow_config == HTTP_FOLLOW_INITIAL)
1692 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1693
1694 headers = curl_slist_append(headers, buf.buf);
1695
1696 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1697 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1698 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1699
1700 ret = run_one_slot(slot, &results);
1701
1702 if (options && options->content_type) {
1703 struct strbuf raw = STRBUF_INIT;
1704 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1705 extract_content_type(&raw, options->content_type,
1706 options->charset);
1707 strbuf_release(&raw);
1708 }
1709
1710 if (options && options->effective_url)
1711 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1712 options->effective_url);
1713
1714 curl_slist_free_all(headers);
1715 strbuf_release(&buf);
1716
1717 return ret;
1718}
1719
1720/*
1721 * Update the "base" url to a more appropriate value, as deduced by
1722 * redirects seen when requesting a URL starting with "url".
1723 *
1724 * The "asked" parameter is a URL that we asked curl to access, and must begin
1725 * with "base".
1726 *
1727 * The "got" parameter is the URL that curl reported to us as where we ended
1728 * up.
1729 *
1730 * Returns 1 if we updated the base url, 0 otherwise.
1731 *
1732 * Our basic strategy is to compare "base" and "asked" to find the bits
1733 * specific to our request. We then strip those bits off of "got" to yield the
1734 * new base. So for example, if our base is "http://example.com/foo.git",
1735 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1736 * with "https://other.example.com/foo.git/info/refs". We would want the
1737 * new URL to become "https://other.example.com/foo.git".
1738 *
1739 * Note that this assumes a sane redirect scheme. It's entirely possible
1740 * in the example above to end up at a URL that does not even end in
1741 * "info/refs". In such a case we die. There's not much we can do, such a
1742 * scheme is unlikely to represent a real git repository, and failing to
1743 * rewrite the base opens options for malicious redirects to do funny things.
1744 */
1745static int update_url_from_redirect(struct strbuf *base,
1746 const char *asked,
1747 const struct strbuf *got)
1748{
1749 const char *tail;
1750 size_t new_len;
1751
1752 if (!strcmp(asked, got->buf))
1753 return 0;
1754
1755 if (!skip_prefix(asked, base->buf, &tail))
1756 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1757 asked, base->buf);
1758
1759 new_len = got->len;
1760 if (!strip_suffix_mem(got->buf, &new_len, tail))
1761 die(_("unable to update url base from redirection:\n"
1762 " asked for: %s\n"
1763 " redirect: %s"),
1764 asked, got->buf);
1765
1766 strbuf_reset(base);
1767 strbuf_add(base, got->buf, new_len);
1768
1769 return 1;
1770}
1771
1772static int http_request_reauth(const char *url,
1773 void *result, int target,
1774 struct http_get_options *options)
1775{
1776 int ret = http_request(url, result, target, options);
1777
1778 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1779 return ret;
1780
1781 if (options && options->effective_url && options->base_url) {
1782 if (update_url_from_redirect(options->base_url,
1783 url, options->effective_url)) {
1784 credential_from_url(&http_auth, options->base_url->buf);
1785 url = options->effective_url->buf;
1786 }
1787 }
1788
1789 if (ret != HTTP_REAUTH)
1790 return ret;
1791
1792 /*
1793 * If we are using KEEP_ERROR, the previous request may have
1794 * put cruft into our output stream; we should clear it out before
1795 * making our next request. We only know how to do this for
1796 * the strbuf case, but that is enough to satisfy current callers.
1797 */
1798 if (options && options->keep_error) {
1799 switch (target) {
1800 case HTTP_REQUEST_STRBUF:
1801 strbuf_reset(result);
1802 break;
1803 default:
1804 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1805 }
1806 }
1807
1808 credential_fill(&http_auth);
1809
1810 return http_request(url, result, target, options);
1811}
1812
1813int http_get_strbuf(const char *url,
1814 struct strbuf *result,
1815 struct http_get_options *options)
1816{
1817 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1818}
1819
1820/*
1821 * Downloads a URL and stores the result in the given file.
1822 *
1823 * If a previous interrupted download is detected (i.e. a previous temporary
1824 * file is still around) the download is resumed.
1825 */
1826static int http_get_file(const char *url, const char *filename,
1827 struct http_get_options *options)
1828{
1829 int ret;
1830 struct strbuf tmpfile = STRBUF_INIT;
1831 FILE *result;
1832
1833 strbuf_addf(&tmpfile, "%s.temp", filename);
1834 result = fopen(tmpfile.buf, "a");
1835 if (!result) {
1836 error("Unable to open local file %s", tmpfile.buf);
1837 ret = HTTP_ERROR;
1838 goto cleanup;
1839 }
1840
1841 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1842 fclose(result);
1843
1844 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1845 ret = HTTP_ERROR;
1846cleanup:
1847 strbuf_release(&tmpfile);
1848 return ret;
1849}
1850
1851int http_fetch_ref(const char *base, struct ref *ref)
1852{
1853 struct http_get_options options = {0};
1854 char *url;
1855 struct strbuf buffer = STRBUF_INIT;
1856 int ret = -1;
1857
1858 options.no_cache = 1;
1859
1860 url = quote_ref_url(base, ref->name);
1861 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1862 strbuf_rtrim(&buffer);
1863 if (buffer.len == 40)
1864 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1865 else if (starts_with(buffer.buf, "ref: ")) {
1866 ref->symref = xstrdup(buffer.buf + 5);
1867 ret = 0;
1868 }
1869 }
1870
1871 strbuf_release(&buffer);
1872 free(url);
1873 return ret;
1874}
1875
1876/* Helpers for fetching packs */
1877static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1878{
1879 char *url, *tmp;
1880 struct strbuf buf = STRBUF_INIT;
1881
1882 if (http_is_verbose)
1883 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1884
1885 end_url_with_slash(&buf, base_url);
1886 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1887 url = strbuf_detach(&buf, NULL);
1888
1889 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1890 tmp = strbuf_detach(&buf, NULL);
1891
1892 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1893 error("Unable to get pack index %s", url);
1894 free(tmp);
1895 tmp = NULL;
1896 }
1897
1898 free(url);
1899 return tmp;
1900}
1901
1902static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1903 unsigned char *sha1, const char *base_url)
1904{
1905 struct packed_git *new_pack;
1906 char *tmp_idx = NULL;
1907 int ret;
1908
1909 if (has_pack_index(sha1)) {
1910 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1911 if (!new_pack)
1912 return -1; /* parse_pack_index() already issued error message */
1913 goto add_pack;
1914 }
1915
1916 tmp_idx = fetch_pack_index(sha1, base_url);
1917 if (!tmp_idx)
1918 return -1;
1919
1920 new_pack = parse_pack_index(sha1, tmp_idx);
1921 if (!new_pack) {
1922 unlink(tmp_idx);
1923 free(tmp_idx);
1924
1925 return -1; /* parse_pack_index() already issued error message */
1926 }
1927
1928 ret = verify_pack_index(new_pack);
1929 if (!ret) {
1930 close_pack_index(new_pack);
1931 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1932 }
1933 free(tmp_idx);
1934 if (ret)
1935 return -1;
1936
1937add_pack:
1938 new_pack->next = *packs_head;
1939 *packs_head = new_pack;
1940 return 0;
1941}
1942
1943int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1944{
1945 struct http_get_options options = {0};
1946 int ret = 0, i = 0;
1947 char *url, *data;
1948 struct strbuf buf = STRBUF_INIT;
1949 unsigned char sha1[20];
1950
1951 end_url_with_slash(&buf, base_url);
1952 strbuf_addstr(&buf, "objects/info/packs");
1953 url = strbuf_detach(&buf, NULL);
1954
1955 options.no_cache = 1;
1956 ret = http_get_strbuf(url, &buf, &options);
1957 if (ret != HTTP_OK)
1958 goto cleanup;
1959
1960 data = buf.buf;
1961 while (i < buf.len) {
1962 switch (data[i]) {
1963 case 'P':
1964 i++;
1965 if (i + 52 <= buf.len &&
1966 starts_with(data + i, " pack-") &&
1967 starts_with(data + i + 46, ".pack\n")) {
1968 get_sha1_hex(data + i + 6, sha1);
1969 fetch_and_setup_pack_index(packs_head, sha1,
1970 base_url);
1971 i += 51;
1972 break;
1973 }
1974 default:
1975 while (i < buf.len && data[i] != '\n')
1976 i++;
1977 }
1978 i++;
1979 }
1980
1981cleanup:
1982 free(url);
1983 return ret;
1984}
1985
1986void release_http_pack_request(struct http_pack_request *preq)
1987{
1988 if (preq->packfile != NULL) {
1989 fclose(preq->packfile);
1990 preq->packfile = NULL;
1991 }
1992 preq->slot = NULL;
1993 free(preq->url);
1994 free(preq);
1995}
1996
1997int finish_http_pack_request(struct http_pack_request *preq)
1998{
1999 struct packed_git **lst;
2000 struct packed_git *p = preq->target;
2001 char *tmp_idx;
2002 size_t len;
2003 struct child_process ip = CHILD_PROCESS_INIT;
2004 const char *ip_argv[8];
2005
2006 close_pack_index(p);
2007
2008 fclose(preq->packfile);
2009 preq->packfile = NULL;
2010
2011 lst = preq->lst;
2012 while (*lst != p)
2013 lst = &((*lst)->next);
2014 *lst = (*lst)->next;
2015
2016 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2017 die("BUG: pack tmpfile does not end in .pack.temp?");
2018 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2019
2020 ip_argv[0] = "index-pack";
2021 ip_argv[1] = "-o";
2022 ip_argv[2] = tmp_idx;
2023 ip_argv[3] = preq->tmpfile;
2024 ip_argv[4] = NULL;
2025
2026 ip.argv = ip_argv;
2027 ip.git_cmd = 1;
2028 ip.no_stdin = 1;
2029 ip.no_stdout = 1;
2030
2031 if (run_command(&ip)) {
2032 unlink(preq->tmpfile);
2033 unlink(tmp_idx);
2034 free(tmp_idx);
2035 return -1;
2036 }
2037
2038 unlink(sha1_pack_index_name(p->sha1));
2039
2040 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2041 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2042 free(tmp_idx);
2043 return -1;
2044 }
2045
2046 install_packed_git(p);
2047 free(tmp_idx);
2048 return 0;
2049}
2050
2051struct http_pack_request *new_http_pack_request(
2052 struct packed_git *target, const char *base_url)
2053{
2054 off_t prev_posn = 0;
2055 struct strbuf buf = STRBUF_INIT;
2056 struct http_pack_request *preq;
2057
2058 preq = xcalloc(1, sizeof(*preq));
2059 preq->target = target;
2060
2061 end_url_with_slash(&buf, base_url);
2062 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2063 sha1_to_hex(target->sha1));
2064 preq->url = strbuf_detach(&buf, NULL);
2065
2066 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2067 sha1_pack_name(target->sha1));
2068 preq->packfile = fopen(preq->tmpfile, "a");
2069 if (!preq->packfile) {
2070 error("Unable to open local file %s for pack",
2071 preq->tmpfile);
2072 goto abort;
2073 }
2074
2075 preq->slot = get_active_slot();
2076 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2077 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2078 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2079 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2080 no_pragma_header);
2081
2082 /*
2083 * If there is data present from a previous transfer attempt,
2084 * resume where it left off
2085 */
2086 prev_posn = ftello(preq->packfile);
2087 if (prev_posn>0) {
2088 if (http_is_verbose)
2089 fprintf(stderr,
2090 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2091 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2092 http_opt_request_remainder(preq->slot->curl, prev_posn);
2093 }
2094
2095 return preq;
2096
2097abort:
2098 free(preq->url);
2099 free(preq);
2100 return NULL;
2101}
2102
2103/* Helpers for fetching objects (loose) */
2104static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2105 void *data)
2106{
2107 unsigned char expn[4096];
2108 size_t size = eltsize * nmemb;
2109 int posn = 0;
2110 struct http_object_request *freq = data;
2111 struct active_request_slot *slot = freq->slot;
2112
2113 if (slot) {
2114 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2115 &slot->http_code);
2116 if (c != CURLE_OK)
2117 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2118 curl_easy_strerror(c));
2119 if (slot->http_code >= 300)
2120 return size;
2121 }
2122
2123 do {
2124 ssize_t retval = xwrite(freq->localfile,
2125 (char *) ptr + posn, size - posn);
2126 if (retval < 0)
2127 return posn;
2128 posn += retval;
2129 } while (posn < size);
2130
2131 freq->stream.avail_in = size;
2132 freq->stream.next_in = (void *)ptr;
2133 do {
2134 freq->stream.next_out = expn;
2135 freq->stream.avail_out = sizeof(expn);
2136 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2137 git_SHA1_Update(&freq->c, expn,
2138 sizeof(expn) - freq->stream.avail_out);
2139 } while (freq->stream.avail_in && freq->zret == Z_OK);
2140 return size;
2141}
2142
2143struct http_object_request *new_http_object_request(const char *base_url,
2144 unsigned char *sha1)
2145{
2146 char *hex = sha1_to_hex(sha1);
2147 const char *filename;
2148 char prevfile[PATH_MAX];
2149 int prevlocal;
2150 char prev_buf[PREV_BUF_SIZE];
2151 ssize_t prev_read = 0;
2152 off_t prev_posn = 0;
2153 struct http_object_request *freq;
2154
2155 freq = xcalloc(1, sizeof(*freq));
2156 hashcpy(freq->sha1, sha1);
2157 freq->localfile = -1;
2158
2159 filename = sha1_file_name(sha1);
2160 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2161 "%s.temp", filename);
2162
2163 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2164 unlink_or_warn(prevfile);
2165 rename(freq->tmpfile, prevfile);
2166 unlink_or_warn(freq->tmpfile);
2167
2168 if (freq->localfile != -1)
2169 error("fd leakage in start: %d", freq->localfile);
2170 freq->localfile = open(freq->tmpfile,
2171 O_WRONLY | O_CREAT | O_EXCL, 0666);
2172 /*
2173 * This could have failed due to the "lazy directory creation";
2174 * try to mkdir the last path component.
2175 */
2176 if (freq->localfile < 0 && errno == ENOENT) {
2177 char *dir = strrchr(freq->tmpfile, '/');
2178 if (dir) {
2179 *dir = 0;
2180 mkdir(freq->tmpfile, 0777);
2181 *dir = '/';
2182 }
2183 freq->localfile = open(freq->tmpfile,
2184 O_WRONLY | O_CREAT | O_EXCL, 0666);
2185 }
2186
2187 if (freq->localfile < 0) {
2188 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2189 goto abort;
2190 }
2191
2192 git_inflate_init(&freq->stream);
2193
2194 git_SHA1_Init(&freq->c);
2195
2196 freq->url = get_remote_object_url(base_url, hex, 0);
2197
2198 /*
2199 * If a previous temp file is present, process what was already
2200 * fetched.
2201 */
2202 prevlocal = open(prevfile, O_RDONLY);
2203 if (prevlocal != -1) {
2204 do {
2205 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2206 if (prev_read>0) {
2207 if (fwrite_sha1_file(prev_buf,
2208 1,
2209 prev_read,
2210 freq) == prev_read) {
2211 prev_posn += prev_read;
2212 } else {
2213 prev_read = -1;
2214 }
2215 }
2216 } while (prev_read > 0);
2217 close(prevlocal);
2218 }
2219 unlink_or_warn(prevfile);
2220
2221 /*
2222 * Reset inflate/SHA1 if there was an error reading the previous temp
2223 * file; also rewind to the beginning of the local file.
2224 */
2225 if (prev_read == -1) {
2226 memset(&freq->stream, 0, sizeof(freq->stream));
2227 git_inflate_init(&freq->stream);
2228 git_SHA1_Init(&freq->c);
2229 if (prev_posn>0) {
2230 prev_posn = 0;
2231 lseek(freq->localfile, 0, SEEK_SET);
2232 if (ftruncate(freq->localfile, 0) < 0) {
2233 error_errno("Couldn't truncate temporary file %s",
2234 freq->tmpfile);
2235 goto abort;
2236 }
2237 }
2238 }
2239
2240 freq->slot = get_active_slot();
2241
2242 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2243 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2244 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2245 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2246 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2247 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2248
2249 /*
2250 * If we have successfully processed data from a previous fetch
2251 * attempt, only fetch the data we don't already have.
2252 */
2253 if (prev_posn>0) {
2254 if (http_is_verbose)
2255 fprintf(stderr,
2256 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2257 hex, (uintmax_t)prev_posn);
2258 http_opt_request_remainder(freq->slot->curl, prev_posn);
2259 }
2260
2261 return freq;
2262
2263abort:
2264 free(freq->url);
2265 free(freq);
2266 return NULL;
2267}
2268
2269void process_http_object_request(struct http_object_request *freq)
2270{
2271 if (freq->slot == NULL)
2272 return;
2273 freq->curl_result = freq->slot->curl_result;
2274 freq->http_code = freq->slot->http_code;
2275 freq->slot = NULL;
2276}
2277
2278int finish_http_object_request(struct http_object_request *freq)
2279{
2280 struct stat st;
2281
2282 close(freq->localfile);
2283 freq->localfile = -1;
2284
2285 process_http_object_request(freq);
2286
2287 if (freq->http_code == 416) {
2288 warning("requested range invalid; we may already have all the data.");
2289 } else if (freq->curl_result != CURLE_OK) {
2290 if (stat(freq->tmpfile, &st) == 0)
2291 if (st.st_size == 0)
2292 unlink_or_warn(freq->tmpfile);
2293 return -1;
2294 }
2295
2296 git_inflate_end(&freq->stream);
2297 git_SHA1_Final(freq->real_sha1, &freq->c);
2298 if (freq->zret != Z_STREAM_END) {
2299 unlink_or_warn(freq->tmpfile);
2300 return -1;
2301 }
2302 if (hashcmp(freq->sha1, freq->real_sha1)) {
2303 unlink_or_warn(freq->tmpfile);
2304 return -1;
2305 }
2306 freq->rename =
2307 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2308
2309 return freq->rename;
2310}
2311
2312void abort_http_object_request(struct http_object_request *freq)
2313{
2314 unlink_or_warn(freq->tmpfile);
2315
2316 release_http_object_request(freq);
2317}
2318
2319void release_http_object_request(struct http_object_request *freq)
2320{
2321 if (freq->localfile != -1) {
2322 close(freq->localfile);
2323 freq->localfile = -1;
2324 }
2325 if (freq->url != NULL) {
2326 free(freq->url);
2327 freq->url = NULL;
2328 }
2329 if (freq->slot != NULL) {
2330 freq->slot->callback_func = NULL;
2331 freq->slot->callback_data = NULL;
2332 release_active_slot(freq->slot);
2333 freq->slot = NULL;
2334 }
2335}