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grep: report missing left operand of --and
[git/debian.git] / http.c
blob4abe11c1253600835bfc7d10b1e927bba706cf91
1 #include "git-compat-util.h"
2 #include "http.h"
3 #include "config.h"
4 #include "pack.h"
5 #include "sideband.h"
6 #include "run-command.h"
7 #include "url.h"
8 #include "urlmatch.h"
9 #include "credential.h"
10 #include "version.h"
11 #include "pkt-line.h"
12 #include "gettext.h"
13 #include "transport.h"
14 #include "packfile.h"
15 #include "protocol.h"
16 #include "string-list.h"
17 #include "object-store.h"
18
19 static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
20 static int trace_curl_data = 1;
21 static struct string_list cookies_to_redact = STRING_LIST_INIT_DUP;
22 #if LIBCURL_VERSION_NUM >= 0x070a08
23 long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
24 #else
25 long int git_curl_ipresolve;
26 #endif
27 int active_requests;
28 int http_is_verbose;
29 ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
30
31 #if LIBCURL_VERSION_NUM >= 0x070a06
32 #define LIBCURL_CAN_HANDLE_AUTH_ANY
33 #endif
34
35 static int min_curl_sessions = 1;
36 static int curl_session_count;
37 #ifdef USE_CURL_MULTI
38 static int max_requests = -1;
39 static CURLM *curlm;
40 #endif
41 #ifndef NO_CURL_EASY_DUPHANDLE
42 static CURL *curl_default;
43 #endif
44
45 #define PREV_BUF_SIZE 4096
46
47 char curl_errorstr[CURL_ERROR_SIZE];
48
49 static int curl_ssl_verify = -1;
50 static int curl_ssl_try;
51 static const char *ssl_cert;
52 static const char *ssl_cipherlist;
53 static const char *ssl_version;
54 static struct {
55 const char *name;
56 long ssl_version;
57 } sslversions[] = {
58 { "sslv2", CURL_SSLVERSION_SSLv2 },
59 { "sslv3", CURL_SSLVERSION_SSLv3 },
60 { "tlsv1", CURL_SSLVERSION_TLSv1 },
61 #if LIBCURL_VERSION_NUM >= 0x072200
62 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
63 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
64 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
65 #endif
66 #if LIBCURL_VERSION_NUM >= 0x073400
67 { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 },
68 #endif
69 };
70 #if LIBCURL_VERSION_NUM >= 0x070903
71 static const char *ssl_key;
72 #endif
73 #if LIBCURL_VERSION_NUM >= 0x070908
74 static const char *ssl_capath;
75 #endif
76 #if LIBCURL_VERSION_NUM >= 0x071304
77 static const char *curl_no_proxy;
78 #endif
79 #if LIBCURL_VERSION_NUM >= 0x072c00
80 static const char *ssl_pinnedkey;
81 #endif
82 static const char *ssl_cainfo;
83 static long curl_low_speed_limit = -1;
84 static long curl_low_speed_time = -1;
85 static int curl_ftp_no_epsv;
86 static const char *curl_http_proxy;
87 static const char *http_proxy_authmethod;
88 static struct {
89 const char *name;
90 long curlauth_param;
91 } proxy_authmethods[] = {
92 { "basic", CURLAUTH_BASIC },
93 { "digest", CURLAUTH_DIGEST },
94 { "negotiate", CURLAUTH_GSSNEGOTIATE },
95 { "ntlm", CURLAUTH_NTLM },
96 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
97 { "anyauth", CURLAUTH_ANY },
98 #endif
99 /*
100 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
101 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
102 * here, too
103 */
104 };
105 #ifdef CURLGSSAPI_DELEGATION_FLAG
106 static const char *curl_deleg;
107 static struct {
108 const char *name;
109 long curl_deleg_param;
110 } curl_deleg_levels[] = {
111 { "none", CURLGSSAPI_DELEGATION_NONE },
112 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
113 { "always", CURLGSSAPI_DELEGATION_FLAG },
114 };
115 #endif
116
117 static struct credential proxy_auth = CREDENTIAL_INIT;
118 static const char *curl_proxyuserpwd;
119 static const char *curl_cookie_file;
120 static int curl_save_cookies;
121 struct credential http_auth = CREDENTIAL_INIT;
122 static int http_proactive_auth;
123 static const char *user_agent;
124 static int curl_empty_auth = -1;
125
126 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
127
128 #if LIBCURL_VERSION_NUM >= 0x071700
129 /* Use CURLOPT_KEYPASSWD as is */
130 #elif LIBCURL_VERSION_NUM >= 0x070903
131 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
132 #else
133 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
134 #endif
135
136 static struct credential cert_auth = CREDENTIAL_INIT;
137 static int ssl_cert_password_required;
138 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
139 static unsigned long http_auth_methods = CURLAUTH_ANY;
140 static int http_auth_methods_restricted;
141 /* Modes for which empty_auth cannot actually help us. */
142 static unsigned long empty_auth_useless =
143 CURLAUTH_BASIC
144 #ifdef CURLAUTH_DIGEST_IE
145 | CURLAUTH_DIGEST_IE
146 #endif
147 | CURLAUTH_DIGEST;
148 #endif
149
150 static struct curl_slist *pragma_header;
151 static struct curl_slist *no_pragma_header;
152 static struct curl_slist *extra_http_headers;
153
154 static struct active_request_slot *active_queue_head;
155
156 static char *cached_accept_language;
157
158 static char *http_ssl_backend;
159
160 static int http_schannel_check_revoke = 1;
161 /*
162 * With the backend being set to `schannel`, setting sslCAinfo would override
163 * the Certificate Store in cURL v7.60.0 and later, which is not what we want
164 * by default.
165 */
166 static int http_schannel_use_ssl_cainfo;
167
168 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
169 {
170 size_t size = eltsize * nmemb;
171 struct buffer *buffer = buffer_;
172
173 if (size > buffer->buf.len - buffer->posn)
174 size = buffer->buf.len - buffer->posn;
175 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
176 buffer->posn += size;
177
178 return size;
179 }
180
181 #ifndef NO_CURL_IOCTL
182 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
183 {
184 struct buffer *buffer = clientp;
185
186 switch (cmd) {
187 case CURLIOCMD_NOP:
188 return CURLIOE_OK;
189
190 case CURLIOCMD_RESTARTREAD:
191 buffer->posn = 0;
192 return CURLIOE_OK;
193
194 default:
195 return CURLIOE_UNKNOWNCMD;
196 }
197 }
198 #endif
199
200 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
201 {
202 size_t size = eltsize * nmemb;
203 struct strbuf *buffer = buffer_;
204
205 strbuf_add(buffer, ptr, size);
206 return size;
207 }
208
209 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
210 {
211 return eltsize * nmemb;
212 }
213
214 static void closedown_active_slot(struct active_request_slot *slot)
215 {
216 active_requests--;
217 slot->in_use = 0;
218 }
219
220 static void finish_active_slot(struct active_request_slot *slot)
221 {
222 closedown_active_slot(slot);
223 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
224
225 if (slot->finished != NULL)
226 (*slot->finished) = 1;
227
228 /* Store slot results so they can be read after the slot is reused */
229 if (slot->results != NULL) {
230 slot->results->curl_result = slot->curl_result;
231 slot->results->http_code = slot->http_code;
232 #if LIBCURL_VERSION_NUM >= 0x070a08
233 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
234 &slot->results->auth_avail);
235 #else
236 slot->results->auth_avail = 0;
237 #endif
238
239 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
240 &slot->results->http_connectcode);
241 }
242
243 /* Run callback if appropriate */
244 if (slot->callback_func != NULL)
245 slot->callback_func(slot->callback_data);
246 }
247
248 static void xmulti_remove_handle(struct active_request_slot *slot)
249 {
250 #ifdef USE_CURL_MULTI
251 curl_multi_remove_handle(curlm, slot->curl);
252 #endif
253 }
254
255 #ifdef USE_CURL_MULTI
256 static void process_curl_messages(void)
257 {
258 int num_messages;
259 struct active_request_slot *slot;
260 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
261
262 while (curl_message != NULL) {
263 if (curl_message->msg == CURLMSG_DONE) {
264 int curl_result = curl_message->data.result;
265 slot = active_queue_head;
266 while (slot != NULL &&
267 slot->curl != curl_message->easy_handle)
268 slot = slot->next;
269 if (slot != NULL) {
270 xmulti_remove_handle(slot);
271 slot->curl_result = curl_result;
272 finish_active_slot(slot);
273 } else {
274 fprintf(stderr, "Received DONE message for unknown request!\n");
275 }
276 } else {
277 fprintf(stderr, "Unknown CURL message received: %d\n",
278 (int)curl_message->msg);
279 }
280 curl_message = curl_multi_info_read(curlm, &num_messages);
281 }
282 }
283 #endif
284
285 static int http_options(const char *var, const char *value, void *cb)
286 {
287 if (!strcmp("http.sslverify", var)) {
288 curl_ssl_verify = git_config_bool(var, value);
289 return 0;
290 }
291 if (!strcmp("http.sslcipherlist", var))
292 return git_config_string(&ssl_cipherlist, var, value);
293 if (!strcmp("http.sslversion", var))
294 return git_config_string(&ssl_version, var, value);
295 if (!strcmp("http.sslcert", var))
296 return git_config_pathname(&ssl_cert, var, value);
297 #if LIBCURL_VERSION_NUM >= 0x070903
298 if (!strcmp("http.sslkey", var))
299 return git_config_pathname(&ssl_key, var, value);
300 #endif
301 #if LIBCURL_VERSION_NUM >= 0x070908
302 if (!strcmp("http.sslcapath", var))
303 return git_config_pathname(&ssl_capath, var, value);
304 #endif
305 if (!strcmp("http.sslcainfo", var))
306 return git_config_pathname(&ssl_cainfo, var, value);
307 if (!strcmp("http.sslcertpasswordprotected", var)) {
308 ssl_cert_password_required = git_config_bool(var, value);
309 return 0;
310 }
311 if (!strcmp("http.ssltry", var)) {
312 curl_ssl_try = git_config_bool(var, value);
313 return 0;
314 }
315 if (!strcmp("http.sslbackend", var)) {
316 free(http_ssl_backend);
317 http_ssl_backend = xstrdup_or_null(value);
318 return 0;
319 }
320
321 if (!strcmp("http.schannelcheckrevoke", var)) {
322 http_schannel_check_revoke = git_config_bool(var, value);
323 return 0;
324 }
325
326 if (!strcmp("http.schannelusesslcainfo", var)) {
327 http_schannel_use_ssl_cainfo = git_config_bool(var, value);
328 return 0;
329 }
330
331 if (!strcmp("http.minsessions", var)) {
332 min_curl_sessions = git_config_int(var, value);
333 #ifndef USE_CURL_MULTI
334 if (min_curl_sessions > 1)
335 min_curl_sessions = 1;
336 #endif
337 return 0;
338 }
339 #ifdef USE_CURL_MULTI
340 if (!strcmp("http.maxrequests", var)) {
341 max_requests = git_config_int(var, value);
342 return 0;
343 }
344 #endif
345 if (!strcmp("http.lowspeedlimit", var)) {
346 curl_low_speed_limit = (long)git_config_int(var, value);
347 return 0;
348 }
349 if (!strcmp("http.lowspeedtime", var)) {
350 curl_low_speed_time = (long)git_config_int(var, value);
351 return 0;
352 }
353
354 if (!strcmp("http.noepsv", var)) {
355 curl_ftp_no_epsv = git_config_bool(var, value);
356 return 0;
357 }
358 if (!strcmp("http.proxy", var))
359 return git_config_string(&curl_http_proxy, var, value);
360
361 if (!strcmp("http.proxyauthmethod", var))
362 return git_config_string(&http_proxy_authmethod, var, value);
363
364 if (!strcmp("http.cookiefile", var))
365 return git_config_pathname(&curl_cookie_file, var, value);
366 if (!strcmp("http.savecookies", var)) {
367 curl_save_cookies = git_config_bool(var, value);
368 return 0;
369 }
370
371 if (!strcmp("http.postbuffer", var)) {
372 http_post_buffer = git_config_ssize_t(var, value);
373 if (http_post_buffer < 0)
374 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
375 if (http_post_buffer < LARGE_PACKET_MAX)
376 http_post_buffer = LARGE_PACKET_MAX;
377 return 0;
378 }
379
380 if (!strcmp("http.useragent", var))
381 return git_config_string(&user_agent, var, value);
382
383 if (!strcmp("http.emptyauth", var)) {
384 if (value && !strcmp("auto", value))
385 curl_empty_auth = -1;
386 else
387 curl_empty_auth = git_config_bool(var, value);
388 return 0;
389 }
390
391 if (!strcmp("http.delegation", var)) {
392 #ifdef CURLGSSAPI_DELEGATION_FLAG
393 return git_config_string(&curl_deleg, var, value);
394 #else
395 warning(_("Delegation control is not supported with cURL < 7.22.0"));
396 return 0;
397 #endif
398 }
399
400 if (!strcmp("http.pinnedpubkey", var)) {
401 #if LIBCURL_VERSION_NUM >= 0x072c00
402 return git_config_pathname(&ssl_pinnedkey, var, value);
403 #else
404 warning(_("Public key pinning not supported with cURL < 7.44.0"));
405 return 0;
406 #endif
407 }
408
409 if (!strcmp("http.extraheader", var)) {
410 if (!value) {
411 return config_error_nonbool(var);
412 } else if (!*value) {
413 curl_slist_free_all(extra_http_headers);
414 extra_http_headers = NULL;
415 } else {
416 extra_http_headers =
417 curl_slist_append(extra_http_headers, value);
418 }
419 return 0;
420 }
421
422 if (!strcmp("http.followredirects", var)) {
423 if (value && !strcmp(value, "initial"))
424 http_follow_config = HTTP_FOLLOW_INITIAL;
425 else if (git_config_bool(var, value))
426 http_follow_config = HTTP_FOLLOW_ALWAYS;
427 else
428 http_follow_config = HTTP_FOLLOW_NONE;
429 return 0;
430 }
431
432 /* Fall back on the default ones */
433 return git_default_config(var, value, cb);
434 }
435
436 static int curl_empty_auth_enabled(void)
437 {
438 if (curl_empty_auth >= 0)
439 return curl_empty_auth;
440
441 #ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
442 /*
443 * Our libcurl is too old to do AUTH_ANY in the first place;
444 * just default to turning the feature off.
445 */
446 #else
447 /*
448 * In the automatic case, kick in the empty-auth
449 * hack as long as we would potentially try some
450 * method more exotic than "Basic" or "Digest".
451 *
452 * But only do this when this is our second or
453 * subsequent request, as by then we know what
454 * methods are available.
455 */
456 if (http_auth_methods_restricted &&
457 (http_auth_methods & ~empty_auth_useless))
458 return 1;
459 #endif
460 return 0;
461 }
462
463 static void init_curl_http_auth(CURL *result)
464 {
465 if (!http_auth.username || !*http_auth.username) {
466 if (curl_empty_auth_enabled())
467 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
468 return;
469 }
470
471 credential_fill(&http_auth);
472
473 #if LIBCURL_VERSION_NUM >= 0x071301
474 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
475 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
476 #else
477 {
478 static struct strbuf up = STRBUF_INIT;
479 /*
480 * Note that we assume we only ever have a single set of
481 * credentials in a given program run, so we do not have
482 * to worry about updating this buffer, only setting its
483 * initial value.
484 */
485 if (!up.len)
486 strbuf_addf(&up, "%s:%s",
487 http_auth.username, http_auth.password);
488 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
489 }
490 #endif
491 }
492
493 /* *var must be free-able */
494 static void var_override(const char **var, char *value)
495 {
496 if (value) {
497 free((void *)*var);
498 *var = xstrdup(value);
499 }
500 }
501
502 static void set_proxyauth_name_password(CURL *result)
503 {
504 #if LIBCURL_VERSION_NUM >= 0x071301
505 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
506 proxy_auth.username);
507 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
508 proxy_auth.password);
509 #else
510 struct strbuf s = STRBUF_INIT;
511
512 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
513 strbuf_addch(&s, ':');
514 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
515 curl_proxyuserpwd = strbuf_detach(&s, NULL);
516 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
517 #endif
518 }
519
520 static void init_curl_proxy_auth(CURL *result)
521 {
522 if (proxy_auth.username) {
523 if (!proxy_auth.password)
524 credential_fill(&proxy_auth);
525 set_proxyauth_name_password(result);
526 }
527
528 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
529
530 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
531 if (http_proxy_authmethod) {
532 int i;
533 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
534 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
535 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
536 proxy_authmethods[i].curlauth_param);
537 break;
538 }
539 }
540 if (i == ARRAY_SIZE(proxy_authmethods)) {
541 warning("unsupported proxy authentication method %s: using anyauth",
542 http_proxy_authmethod);
543 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
544 }
545 }
546 else
547 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
548 #endif
549 }
550
551 static int has_cert_password(void)
552 {
553 if (ssl_cert == NULL || ssl_cert_password_required != 1)
554 return 0;
555 if (!cert_auth.password) {
556 cert_auth.protocol = xstrdup("cert");
557 cert_auth.host = xstrdup("");
558 cert_auth.username = xstrdup("");
559 cert_auth.path = xstrdup(ssl_cert);
560 credential_fill(&cert_auth);
561 }
562 return 1;
563 }
564
565 #if LIBCURL_VERSION_NUM >= 0x071900
566 static void set_curl_keepalive(CURL *c)
567 {
568 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
569 }
570
571 #elif LIBCURL_VERSION_NUM >= 0x071000
572 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
573 {
574 int ka = 1;
575 int rc;
576 socklen_t len = (socklen_t)sizeof(ka);
577
578 if (type != CURLSOCKTYPE_IPCXN)
579 return 0;
580
581 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
582 if (rc < 0)
583 warning_errno("unable to set SO_KEEPALIVE on socket");
584
585 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
586 }
587
588 static void set_curl_keepalive(CURL *c)
589 {
590 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
591 }
592
593 #else
594 static void set_curl_keepalive(CURL *c)
595 {
596 /* not supported on older curl versions */
597 }
598 #endif
599
600 static void redact_sensitive_header(struct strbuf *header)
601 {
602 const char *sensitive_header;
603
604 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
605 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
606 /* The first token is the type, which is OK to log */
607 while (isspace(*sensitive_header))
608 sensitive_header++;
609 while (*sensitive_header && !isspace(*sensitive_header))
610 sensitive_header++;
611 /* Everything else is opaque and possibly sensitive */
612 strbuf_setlen(header, sensitive_header - header->buf);
613 strbuf_addstr(header, " <redacted>");
614 } else if (cookies_to_redact.nr &&
615 skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
616 struct strbuf redacted_header = STRBUF_INIT;
617 char *cookie;
618
619 while (isspace(*sensitive_header))
620 sensitive_header++;
621
622 /*
623 * The contents of header starting from sensitive_header will
624 * subsequently be overridden, so it is fine to mutate this
625 * string (hence the assignment to "char *").
626 */
627 cookie = (char *) sensitive_header;
628
629 while (cookie) {
630 char *equals;
631 char *semicolon = strstr(cookie, "; ");
632 if (semicolon)
633 *semicolon = 0;
634 equals = strchrnul(cookie, '=');
635 if (!equals) {
636 /* invalid cookie, just append and continue */
637 strbuf_addstr(&redacted_header, cookie);
638 continue;
639 }
640 *equals = 0; /* temporarily set to NUL for lookup */
641 if (string_list_lookup(&cookies_to_redact, cookie)) {
642 strbuf_addstr(&redacted_header, cookie);
643 strbuf_addstr(&redacted_header, "=<redacted>");
644 } else {
645 *equals = '=';
646 strbuf_addstr(&redacted_header, cookie);
647 }
648 if (semicolon) {
649 /*
650 * There are more cookies. (Or, for some
651 * reason, the input string ends in "; ".)
652 */
653 strbuf_addstr(&redacted_header, "; ");
654 cookie = semicolon + strlen("; ");
655 } else {
656 cookie = NULL;
657 }
658 }
659
660 strbuf_setlen(header, sensitive_header - header->buf);
661 strbuf_addbuf(header, &redacted_header);
662 }
663 }
664
665 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
666 {
667 struct strbuf out = STRBUF_INIT;
668 struct strbuf **headers, **header;
669
670 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
671 text, (long)size, (long)size);
672 trace_strbuf(&trace_curl, &out);
673 strbuf_reset(&out);
674 strbuf_add(&out, ptr, size);
675 headers = strbuf_split_max(&out, '\n', 0);
676
677 for (header = headers; *header; header++) {
678 if (hide_sensitive_header)
679 redact_sensitive_header(*header);
680 strbuf_insert((*header), 0, text, strlen(text));
681 strbuf_insert((*header), strlen(text), ": ", 2);
682 strbuf_rtrim((*header));
683 strbuf_addch((*header), '\n');
684 trace_strbuf(&trace_curl, (*header));
685 }
686 strbuf_list_free(headers);
687 strbuf_release(&out);
688 }
689
690 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
691 {
692 size_t i;
693 struct strbuf out = STRBUF_INIT;
694 unsigned int width = 60;
695
696 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
697 text, (long)size, (long)size);
698 trace_strbuf(&trace_curl, &out);
699
700 for (i = 0; i < size; i += width) {
701 size_t w;
702
703 strbuf_reset(&out);
704 strbuf_addf(&out, "%s: ", text);
705 for (w = 0; (w < width) && (i + w < size); w++) {
706 unsigned char ch = ptr[i + w];
707
708 strbuf_addch(&out,
709 (ch >= 0x20) && (ch < 0x80)
710 ? ch : '.');
711 }
712 strbuf_addch(&out, '\n');
713 trace_strbuf(&trace_curl, &out);
714 }
715 strbuf_release(&out);
716 }
717
718 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
719 {
720 const char *text;
721 enum { NO_FILTER = 0, DO_FILTER = 1 };
722
723 switch (type) {
724 case CURLINFO_TEXT:
725 trace_printf_key(&trace_curl, "== Info: %s", data);
726 break;
727 case CURLINFO_HEADER_OUT:
728 text = "=> Send header";
729 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
730 break;
731 case CURLINFO_DATA_OUT:
732 if (trace_curl_data) {
733 text = "=> Send data";
734 curl_dump_data(text, (unsigned char *)data, size);
735 }
736 break;
737 case CURLINFO_SSL_DATA_OUT:
738 if (trace_curl_data) {
739 text = "=> Send SSL data";
740 curl_dump_data(text, (unsigned char *)data, size);
741 }
742 break;
743 case CURLINFO_HEADER_IN:
744 text = "<= Recv header";
745 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
746 break;
747 case CURLINFO_DATA_IN:
748 if (trace_curl_data) {
749 text = "<= Recv data";
750 curl_dump_data(text, (unsigned char *)data, size);
751 }
752 break;
753 case CURLINFO_SSL_DATA_IN:
754 if (trace_curl_data) {
755 text = "<= Recv SSL data";
756 curl_dump_data(text, (unsigned char *)data, size);
757 }
758 break;
759
760 default: /* we ignore unknown types by default */
761 return 0;
762 }
763 return 0;
764 }
765
766 void setup_curl_trace(CURL *handle)
767 {
768 if (!trace_want(&trace_curl))
769 return;
770 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
771 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
772 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
773 }
774
775 #ifdef CURLPROTO_HTTP
776 static long get_curl_allowed_protocols(int from_user)
777 {
778 long allowed_protocols = 0;
779
780 if (is_transport_allowed("http", from_user))
781 allowed_protocols |= CURLPROTO_HTTP;
782 if (is_transport_allowed("https", from_user))
783 allowed_protocols |= CURLPROTO_HTTPS;
784 if (is_transport_allowed("ftp", from_user))
785 allowed_protocols |= CURLPROTO_FTP;
786 if (is_transport_allowed("ftps", from_user))
787 allowed_protocols |= CURLPROTO_FTPS;
788
789 return allowed_protocols;
790 }
791 #endif
792
793 static CURL *get_curl_handle(void)
794 {
795 CURL *result = curl_easy_init();
796
797 if (!result)
798 die("curl_easy_init failed");
799
800 if (!curl_ssl_verify) {
801 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
802 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
803 } else {
804 /* Verify authenticity of the peer's certificate */
805 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
806 /* The name in the cert must match whom we tried to connect */
807 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
808 }
809
810 #if LIBCURL_VERSION_NUM >= 0x070907
811 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
812 #endif
813 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
814 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
815 #endif
816
817 #ifdef CURLGSSAPI_DELEGATION_FLAG
818 if (curl_deleg) {
819 int i;
820 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
821 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
822 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
823 curl_deleg_levels[i].curl_deleg_param);
824 break;
825 }
826 }
827 if (i == ARRAY_SIZE(curl_deleg_levels))
828 warning("Unknown delegation method '%s': using default",
829 curl_deleg);
830 }
831 #endif
832
833 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
834 !http_schannel_check_revoke) {
835 #if LIBCURL_VERSION_NUM >= 0x072c00
836 curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
837 #else
838 warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0"));
839 #endif
840 }
841
842 if (http_proactive_auth)
843 init_curl_http_auth(result);
844
845 if (getenv("GIT_SSL_VERSION"))
846 ssl_version = getenv("GIT_SSL_VERSION");
847 if (ssl_version && *ssl_version) {
848 int i;
849 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
850 if (!strcmp(ssl_version, sslversions[i].name)) {
851 curl_easy_setopt(result, CURLOPT_SSLVERSION,
852 sslversions[i].ssl_version);
853 break;
854 }
855 }
856 if (i == ARRAY_SIZE(sslversions))
857 warning("unsupported ssl version %s: using default",
858 ssl_version);
859 }
860
861 if (getenv("GIT_SSL_CIPHER_LIST"))
862 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
863 if (ssl_cipherlist != NULL && *ssl_cipherlist)
864 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
865 ssl_cipherlist);
866
867 if (ssl_cert != NULL)
868 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
869 if (has_cert_password())
870 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
871 #if LIBCURL_VERSION_NUM >= 0x070903
872 if (ssl_key != NULL)
873 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
874 #endif
875 #if LIBCURL_VERSION_NUM >= 0x070908
876 if (ssl_capath != NULL)
877 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
878 #endif
879 #if LIBCURL_VERSION_NUM >= 0x072c00
880 if (ssl_pinnedkey != NULL)
881 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
882 #endif
883 if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
884 !http_schannel_use_ssl_cainfo) {
885 curl_easy_setopt(result, CURLOPT_CAINFO, NULL);
886 #if LIBCURL_VERSION_NUM >= 0x073400
887 curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL);
888 #endif
889 } else if (ssl_cainfo != NULL)
890 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
891
892 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
893 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
894 curl_low_speed_limit);
895 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
896 curl_low_speed_time);
897 }
898
899 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
900 #if LIBCURL_VERSION_NUM >= 0x071301
901 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
902 #elif LIBCURL_VERSION_NUM >= 0x071101
903 curl_easy_setopt(result, CURLOPT_POST301, 1);
904 #endif
905 #ifdef CURLPROTO_HTTP
906 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
907 get_curl_allowed_protocols(0));
908 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
909 get_curl_allowed_protocols(-1));
910 #else
911 warning(_("Protocol restrictions not supported with cURL < 7.19.4"));
912 #endif
913 if (getenv("GIT_CURL_VERBOSE"))
914 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
915 setup_curl_trace(result);
916 if (getenv("GIT_TRACE_CURL_NO_DATA"))
917 trace_curl_data = 0;
918 if (getenv("GIT_REDACT_COOKIES")) {
919 string_list_split(&cookies_to_redact,
920 getenv("GIT_REDACT_COOKIES"), ',', -1);
921 string_list_sort(&cookies_to_redact);
922 }
923
924 curl_easy_setopt(result, CURLOPT_USERAGENT,
925 user_agent ? user_agent : git_user_agent());
926
927 if (curl_ftp_no_epsv)
928 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
929
930 #ifdef CURLOPT_USE_SSL
931 if (curl_ssl_try)
932 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
933 #endif
934
935 /*
936 * CURL also examines these variables as a fallback; but we need to query
937 * them here in order to decide whether to prompt for missing password (cf.
938 * init_curl_proxy_auth()).
939 *
940 * Unlike many other common environment variables, these are historically
941 * lowercase only. It appears that CURL did not know this and implemented
942 * only uppercase variants, which was later corrected to take both - with
943 * the exception of http_proxy, which is lowercase only also in CURL. As
944 * the lowercase versions are the historical quasi-standard, they take
945 * precedence here, as in CURL.
946 */
947 if (!curl_http_proxy) {
948 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
949 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
950 var_override(&curl_http_proxy, getenv("https_proxy"));
951 } else {
952 var_override(&curl_http_proxy, getenv("http_proxy"));
953 }
954 if (!curl_http_proxy) {
955 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
956 var_override(&curl_http_proxy, getenv("all_proxy"));
957 }
958 }
959
960 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
961 /*
962 * Handle case with the empty http.proxy value here to keep
963 * common code clean.
964 * NB: empty option disables proxying at all.
965 */
966 curl_easy_setopt(result, CURLOPT_PROXY, "");
967 } else if (curl_http_proxy) {
968 #if LIBCURL_VERSION_NUM >= 0x071800
969 if (starts_with(curl_http_proxy, "socks5h"))
970 curl_easy_setopt(result,
971 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
972 else if (starts_with(curl_http_proxy, "socks5"))
973 curl_easy_setopt(result,
974 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
975 else if (starts_with(curl_http_proxy, "socks4a"))
976 curl_easy_setopt(result,
977 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
978 else if (starts_with(curl_http_proxy, "socks"))
979 curl_easy_setopt(result,
980 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
981 #endif
982 #if LIBCURL_VERSION_NUM >= 0x073400
983 else if (starts_with(curl_http_proxy, "https"))
984 curl_easy_setopt(result,
985 CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
986 #endif
987 if (strstr(curl_http_proxy, "://"))
988 credential_from_url(&proxy_auth, curl_http_proxy);
989 else {
990 struct strbuf url = STRBUF_INIT;
991 strbuf_addf(&url, "http://%s", curl_http_proxy);
992 credential_from_url(&proxy_auth, url.buf);
993 strbuf_release(&url);
994 }
995
996 if (!proxy_auth.host)
997 die("Invalid proxy URL '%s'", curl_http_proxy);
998
999 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
1000 #if LIBCURL_VERSION_NUM >= 0x071304
1001 var_override(&curl_no_proxy, getenv("NO_PROXY"));
1002 var_override(&curl_no_proxy, getenv("no_proxy"));
1003 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
1004 #endif
1005 }
1006 init_curl_proxy_auth(result);
1007
1008 set_curl_keepalive(result);
1009
1010 return result;
1011 }
1012
1013 static void set_from_env(const char **var, const char *envname)
1014 {
1015 const char *val = getenv(envname);
1016 if (val)
1017 *var = val;
1018 }
1019
1020 void http_init(struct remote *remote, const char *url, int proactive_auth)
1021 {
1022 char *low_speed_limit;
1023 char *low_speed_time;
1024 char *normalized_url;
1025 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
1026
1027 config.section = "http";
1028 config.key = NULL;
1029 config.collect_fn = http_options;
1030 config.cascade_fn = git_default_config;
1031 config.cb = NULL;
1032
1033 http_is_verbose = 0;
1034 normalized_url = url_normalize(url, &config.url);
1035
1036 git_config(urlmatch_config_entry, &config);
1037 free(normalized_url);
1038
1039 #if LIBCURL_VERSION_NUM >= 0x073800
1040 if (http_ssl_backend) {
1041 const curl_ssl_backend **backends;
1042 struct strbuf buf = STRBUF_INIT;
1043 int i;
1044
1045 switch (curl_global_sslset(-1, http_ssl_backend, &backends)) {
1046 case CURLSSLSET_UNKNOWN_BACKEND:
1047 strbuf_addf(&buf, _("Unsupported SSL backend '%s'. "
1048 "Supported SSL backends:"),
1049 http_ssl_backend);
1050 for (i = 0; backends[i]; i++)
1051 strbuf_addf(&buf, "\n\t%s", backends[i]->name);
1052 die("%s", buf.buf);
1053 case CURLSSLSET_NO_BACKENDS:
1054 die(_("Could not set SSL backend to '%s': "
1055 "cURL was built without SSL backends"),
1056 http_ssl_backend);
1057 case CURLSSLSET_TOO_LATE:
1058 die(_("Could not set SSL backend to '%s': already set"),
1059 http_ssl_backend);
1060 case CURLSSLSET_OK:
1061 break; /* Okay! */
1062 }
1063 }
1064 #endif
1065
1066 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1067 die("curl_global_init failed");
1068
1069 http_proactive_auth = proactive_auth;
1070
1071 if (remote && remote->http_proxy)
1072 curl_http_proxy = xstrdup(remote->http_proxy);
1073
1074 if (remote)
1075 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1076
1077 pragma_header = curl_slist_append(http_copy_default_headers(),
1078 "Pragma: no-cache");
1079 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1080 "Pragma:");
1081
1082 #ifdef USE_CURL_MULTI
1083 {
1084 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1085 if (http_max_requests != NULL)
1086 max_requests = atoi(http_max_requests);
1087 }
1088
1089 curlm = curl_multi_init();
1090 if (!curlm)
1091 die("curl_multi_init failed");
1092 #endif
1093
1094 if (getenv("GIT_SSL_NO_VERIFY"))
1095 curl_ssl_verify = 0;
1096
1097 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1098 #if LIBCURL_VERSION_NUM >= 0x070903
1099 set_from_env(&ssl_key, "GIT_SSL_KEY");
1100 #endif
1101 #if LIBCURL_VERSION_NUM >= 0x070908
1102 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1103 #endif
1104 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1105
1106 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1107
1108 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1109 if (low_speed_limit != NULL)
1110 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1111 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1112 if (low_speed_time != NULL)
1113 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1114
1115 if (curl_ssl_verify == -1)
1116 curl_ssl_verify = 1;
1117
1118 curl_session_count = 0;
1119 #ifdef USE_CURL_MULTI
1120 if (max_requests < 1)
1121 max_requests = DEFAULT_MAX_REQUESTS;
1122 #endif
1123
1124 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1125 curl_ftp_no_epsv = 1;
1126
1127 if (url) {
1128 credential_from_url(&http_auth, url);
1129 if (!ssl_cert_password_required &&
1130 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1131 starts_with(url, "https://"))
1132 ssl_cert_password_required = 1;
1133 }
1134
1135 #ifndef NO_CURL_EASY_DUPHANDLE
1136 curl_default = get_curl_handle();
1137 #endif
1138 }
1139
1140 void http_cleanup(void)
1141 {
1142 struct active_request_slot *slot = active_queue_head;
1143
1144 while (slot != NULL) {
1145 struct active_request_slot *next = slot->next;
1146 if (slot->curl != NULL) {
1147 xmulti_remove_handle(slot);
1148 curl_easy_cleanup(slot->curl);
1149 }
1150 free(slot);
1151 slot = next;
1152 }
1153 active_queue_head = NULL;
1154
1155 #ifndef NO_CURL_EASY_DUPHANDLE
1156 curl_easy_cleanup(curl_default);
1157 #endif
1158
1159 #ifdef USE_CURL_MULTI
1160 curl_multi_cleanup(curlm);
1161 #endif
1162 curl_global_cleanup();
1163
1164 curl_slist_free_all(extra_http_headers);
1165 extra_http_headers = NULL;
1166
1167 curl_slist_free_all(pragma_header);
1168 pragma_header = NULL;
1169
1170 curl_slist_free_all(no_pragma_header);
1171 no_pragma_header = NULL;
1172
1173 if (curl_http_proxy) {
1174 free((void *)curl_http_proxy);
1175 curl_http_proxy = NULL;
1176 }
1177
1178 if (proxy_auth.password) {
1179 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1180 FREE_AND_NULL(proxy_auth.password);
1181 }
1182
1183 free((void *)curl_proxyuserpwd);
1184 curl_proxyuserpwd = NULL;
1185
1186 free((void *)http_proxy_authmethod);
1187 http_proxy_authmethod = NULL;
1188
1189 if (cert_auth.password != NULL) {
1190 memset(cert_auth.password, 0, strlen(cert_auth.password));
1191 FREE_AND_NULL(cert_auth.password);
1192 }
1193 ssl_cert_password_required = 0;
1194
1195 FREE_AND_NULL(cached_accept_language);
1196 }
1197
1198 struct active_request_slot *get_active_slot(void)
1199 {
1200 struct active_request_slot *slot = active_queue_head;
1201 struct active_request_slot *newslot;
1202
1203 #ifdef USE_CURL_MULTI
1204 int num_transfers;
1205
1206 /* Wait for a slot to open up if the queue is full */
1207 while (active_requests >= max_requests) {
1208 curl_multi_perform(curlm, &num_transfers);
1209 if (num_transfers < active_requests)
1210 process_curl_messages();
1211 }
1212 #endif
1213
1214 while (slot != NULL && slot->in_use)
1215 slot = slot->next;
1216
1217 if (slot == NULL) {
1218 newslot = xmalloc(sizeof(*newslot));
1219 newslot->curl = NULL;
1220 newslot->in_use = 0;
1221 newslot->next = NULL;
1222
1223 slot = active_queue_head;
1224 if (slot == NULL) {
1225 active_queue_head = newslot;
1226 } else {
1227 while (slot->next != NULL)
1228 slot = slot->next;
1229 slot->next = newslot;
1230 }
1231 slot = newslot;
1232 }
1233
1234 if (slot->curl == NULL) {
1235 #ifdef NO_CURL_EASY_DUPHANDLE
1236 slot->curl = get_curl_handle();
1237 #else
1238 slot->curl = curl_easy_duphandle(curl_default);
1239 #endif
1240 curl_session_count++;
1241 }
1242
1243 active_requests++;
1244 slot->in_use = 1;
1245 slot->results = NULL;
1246 slot->finished = NULL;
1247 slot->callback_data = NULL;
1248 slot->callback_func = NULL;
1249 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1250 if (curl_save_cookies)
1251 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1252 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1253 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1254 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1255 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1256 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1257 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1258 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1259 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1260 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1261 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1262
1263 /*
1264 * Default following to off unless "ALWAYS" is configured; this gives
1265 * callers a sane starting point, and they can tweak for individual
1266 * HTTP_FOLLOW_* cases themselves.
1267 */
1268 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1269 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1270 else
1271 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1272
1273 #if LIBCURL_VERSION_NUM >= 0x070a08
1274 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1275 #endif
1276 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1277 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1278 #endif
1279 if (http_auth.password || curl_empty_auth_enabled())
1280 init_curl_http_auth(slot->curl);
1281
1282 return slot;
1283 }
1284
1285 int start_active_slot(struct active_request_slot *slot)
1286 {
1287 #ifdef USE_CURL_MULTI
1288 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1289 int num_transfers;
1290
1291 if (curlm_result != CURLM_OK &&
1292 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1293 warning("curl_multi_add_handle failed: %s",
1294 curl_multi_strerror(curlm_result));
1295 active_requests--;
1296 slot->in_use = 0;
1297 return 0;
1298 }
1299
1300 /*
1301 * We know there must be something to do, since we just added
1302 * something.
1303 */
1304 curl_multi_perform(curlm, &num_transfers);
1305 #endif
1306 return 1;
1307 }
1308
1309 #ifdef USE_CURL_MULTI
1310 struct fill_chain {
1311 void *data;
1312 int (*fill)(void *);
1313 struct fill_chain *next;
1314 };
1315
1316 static struct fill_chain *fill_cfg;
1317
1318 void add_fill_function(void *data, int (*fill)(void *))
1319 {
1320 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1321 struct fill_chain **linkp = &fill_cfg;
1322 new_fill->data = data;
1323 new_fill->fill = fill;
1324 new_fill->next = NULL;
1325 while (*linkp)
1326 linkp = &(*linkp)->next;
1327 *linkp = new_fill;
1328 }
1329
1330 void fill_active_slots(void)
1331 {
1332 struct active_request_slot *slot = active_queue_head;
1333
1334 while (active_requests < max_requests) {
1335 struct fill_chain *fill;
1336 for (fill = fill_cfg; fill; fill = fill->next)
1337 if (fill->fill(fill->data))
1338 break;
1339
1340 if (!fill)
1341 break;
1342 }
1343
1344 while (slot != NULL) {
1345 if (!slot->in_use && slot->curl != NULL
1346 && curl_session_count > min_curl_sessions) {
1347 curl_easy_cleanup(slot->curl);
1348 slot->curl = NULL;
1349 curl_session_count--;
1350 }
1351 slot = slot->next;
1352 }
1353 }
1354
1355 void step_active_slots(void)
1356 {
1357 int num_transfers;
1358 CURLMcode curlm_result;
1359
1360 do {
1361 curlm_result = curl_multi_perform(curlm, &num_transfers);
1362 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1363 if (num_transfers < active_requests) {
1364 process_curl_messages();
1365 fill_active_slots();
1366 }
1367 }
1368 #endif
1369
1370 void run_active_slot(struct active_request_slot *slot)
1371 {
1372 #ifdef USE_CURL_MULTI
1373 fd_set readfds;
1374 fd_set writefds;
1375 fd_set excfds;
1376 int max_fd;
1377 struct timeval select_timeout;
1378 int finished = 0;
1379
1380 slot->finished = &finished;
1381 while (!finished) {
1382 step_active_slots();
1383
1384 if (slot->in_use) {
1385 #if LIBCURL_VERSION_NUM >= 0x070f04
1386 long curl_timeout;
1387 curl_multi_timeout(curlm, &curl_timeout);
1388 if (curl_timeout == 0) {
1389 continue;
1390 } else if (curl_timeout == -1) {
1391 select_timeout.tv_sec = 0;
1392 select_timeout.tv_usec = 50000;
1393 } else {
1394 select_timeout.tv_sec = curl_timeout / 1000;
1395 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1396 }
1397 #else
1398 select_timeout.tv_sec = 0;
1399 select_timeout.tv_usec = 50000;
1400 #endif
1401
1402 max_fd = -1;
1403 FD_ZERO(&readfds);
1404 FD_ZERO(&writefds);
1405 FD_ZERO(&excfds);
1406 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1407
1408 /*
1409 * It can happen that curl_multi_timeout returns a pathologically
1410 * long timeout when curl_multi_fdset returns no file descriptors
1411 * to read. See commit message for more details.
1412 */
1413 if (max_fd < 0 &&
1414 (select_timeout.tv_sec > 0 ||
1415 select_timeout.tv_usec > 50000)) {
1416 select_timeout.tv_sec = 0;
1417 select_timeout.tv_usec = 50000;
1418 }
1419
1420 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1421 }
1422 }
1423 #else
1424 while (slot->in_use) {
1425 slot->curl_result = curl_easy_perform(slot->curl);
1426 finish_active_slot(slot);
1427 }
1428 #endif
1429 }
1430
1431 static void release_active_slot(struct active_request_slot *slot)
1432 {
1433 closedown_active_slot(slot);
1434 if (slot->curl) {
1435 xmulti_remove_handle(slot);
1436 if (curl_session_count > min_curl_sessions) {
1437 curl_easy_cleanup(slot->curl);
1438 slot->curl = NULL;
1439 curl_session_count--;
1440 }
1441 }
1442 #ifdef USE_CURL_MULTI
1443 fill_active_slots();
1444 #endif
1445 }
1446
1447 void finish_all_active_slots(void)
1448 {
1449 struct active_request_slot *slot = active_queue_head;
1450
1451 while (slot != NULL)
1452 if (slot->in_use) {
1453 run_active_slot(slot);
1454 slot = active_queue_head;
1455 } else {
1456 slot = slot->next;
1457 }
1458 }
1459
1460 /* Helpers for modifying and creating URLs */
1461 static inline int needs_quote(int ch)
1462 {
1463 if (((ch >= 'A') && (ch <= 'Z'))
1464 || ((ch >= 'a') && (ch <= 'z'))
1465 || ((ch >= '0') && (ch <= '9'))
1466 || (ch == '/')
1467 || (ch == '-')
1468 || (ch == '.'))
1469 return 0;
1470 return 1;
1471 }
1472
1473 static char *quote_ref_url(const char *base, const char *ref)
1474 {
1475 struct strbuf buf = STRBUF_INIT;
1476 const char *cp;
1477 int ch;
1478
1479 end_url_with_slash(&buf, base);
1480
1481 for (cp = ref; (ch = *cp) != 0; cp++)
1482 if (needs_quote(ch))
1483 strbuf_addf(&buf, "%%%02x", ch);
1484 else
1485 strbuf_addch(&buf, *cp);
1486
1487 return strbuf_detach(&buf, NULL);
1488 }
1489
1490 void append_remote_object_url(struct strbuf *buf, const char *url,
1491 const char *hex,
1492 int only_two_digit_prefix)
1493 {
1494 end_url_with_slash(buf, url);
1495
1496 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1497 if (!only_two_digit_prefix)
1498 strbuf_addstr(buf, hex + 2);
1499 }
1500
1501 char *get_remote_object_url(const char *url, const char *hex,
1502 int only_two_digit_prefix)
1503 {
1504 struct strbuf buf = STRBUF_INIT;
1505 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1506 return strbuf_detach(&buf, NULL);
1507 }
1508
1509 static int handle_curl_result(struct slot_results *results)
1510 {
1511 /*
1512 * If we see a failing http code with CURLE_OK, we have turned off
1513 * FAILONERROR (to keep the server's custom error response), and should
1514 * translate the code into failure here.
1515 *
1516 * Likewise, if we see a redirect (30x code), that means we turned off
1517 * redirect-following, and we should treat the result as an error.
1518 */
1519 if (results->curl_result == CURLE_OK &&
1520 results->http_code >= 300) {
1521 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1522 /*
1523 * Normally curl will already have put the "reason phrase"
1524 * from the server into curl_errorstr; unfortunately without
1525 * FAILONERROR it is lost, so we can give only the numeric
1526 * status code.
1527 */
1528 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1529 "The requested URL returned error: %ld",
1530 results->http_code);
1531 }
1532
1533 if (results->curl_result == CURLE_OK) {
1534 credential_approve(&http_auth);
1535 if (proxy_auth.password)
1536 credential_approve(&proxy_auth);
1537 return HTTP_OK;
1538 } else if (missing_target(results))
1539 return HTTP_MISSING_TARGET;
1540 else if (results->http_code == 401) {
1541 if (http_auth.username && http_auth.password) {
1542 credential_reject(&http_auth);
1543 return HTTP_NOAUTH;
1544 } else {
1545 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1546 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1547 if (results->auth_avail) {
1548 http_auth_methods &= results->auth_avail;
1549 http_auth_methods_restricted = 1;
1550 }
1551 #endif
1552 return HTTP_REAUTH;
1553 }
1554 } else {
1555 if (results->http_connectcode == 407)
1556 credential_reject(&proxy_auth);
1557 #if LIBCURL_VERSION_NUM >= 0x070c00
1558 if (!curl_errorstr[0])
1559 strlcpy(curl_errorstr,
1560 curl_easy_strerror(results->curl_result),
1561 sizeof(curl_errorstr));
1562 #endif
1563 return HTTP_ERROR;
1564 }
1565 }
1566
1567 int run_one_slot(struct active_request_slot *slot,
1568 struct slot_results *results)
1569 {
1570 slot->results = results;
1571 if (!start_active_slot(slot)) {
1572 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1573 "failed to start HTTP request");
1574 return HTTP_START_FAILED;
1575 }
1576
1577 run_active_slot(slot);
1578 return handle_curl_result(results);
1579 }
1580
1581 struct curl_slist *http_copy_default_headers(void)
1582 {
1583 struct curl_slist *headers = NULL, *h;
1584
1585 for (h = extra_http_headers; h; h = h->next)
1586 headers = curl_slist_append(headers, h->data);
1587
1588 return headers;
1589 }
1590
1591 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1592 {
1593 char *ptr;
1594 CURLcode ret;
1595
1596 strbuf_reset(buf);
1597 ret = curl_easy_getinfo(curl, info, &ptr);
1598 if (!ret && ptr)
1599 strbuf_addstr(buf, ptr);
1600 return ret;
1601 }
1602
1603 /*
1604 * Check for and extract a content-type parameter. "raw"
1605 * should be positioned at the start of the potential
1606 * parameter, with any whitespace already removed.
1607 *
1608 * "name" is the name of the parameter. The value is appended
1609 * to "out".
1610 */
1611 static int extract_param(const char *raw, const char *name,
1612 struct strbuf *out)
1613 {
1614 size_t len = strlen(name);
1615
1616 if (strncasecmp(raw, name, len))
1617 return -1;
1618 raw += len;
1619
1620 if (*raw != '=')
1621 return -1;
1622 raw++;
1623
1624 while (*raw && !isspace(*raw) && *raw != ';')
1625 strbuf_addch(out, *raw++);
1626 return 0;
1627 }
1628
1629 /*
1630 * Extract a normalized version of the content type, with any
1631 * spaces suppressed, all letters lowercased, and no trailing ";"
1632 * or parameters.
1633 *
1634 * Note that we will silently remove even invalid whitespace. For
1635 * example, "text / plain" is specifically forbidden by RFC 2616,
1636 * but "text/plain" is the only reasonable output, and this keeps
1637 * our code simple.
1638 *
1639 * If the "charset" argument is not NULL, store the value of any
1640 * charset parameter there.
1641 *
1642 * Example:
1643 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1644 * "text / plain" -> "text/plain"
1645 */
1646 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1647 struct strbuf *charset)
1648 {
1649 const char *p;
1650
1651 strbuf_reset(type);
1652 strbuf_grow(type, raw->len);
1653 for (p = raw->buf; *p; p++) {
1654 if (isspace(*p))
1655 continue;
1656 if (*p == ';') {
1657 p++;
1658 break;
1659 }
1660 strbuf_addch(type, tolower(*p));
1661 }
1662
1663 if (!charset)
1664 return;
1665
1666 strbuf_reset(charset);
1667 while (*p) {
1668 while (isspace(*p) || *p == ';')
1669 p++;
1670 if (!extract_param(p, "charset", charset))
1671 return;
1672 while (*p && !isspace(*p))
1673 p++;
1674 }
1675
1676 if (!charset->len && starts_with(type->buf, "text/"))
1677 strbuf_addstr(charset, "ISO-8859-1");
1678 }
1679
1680 static void write_accept_language(struct strbuf *buf)
1681 {
1682 /*
1683 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1684 * that, q-value will be smaller than 0.001, the minimum q-value the
1685 * HTTP specification allows. See
1686 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1687 */
1688 const int MAX_DECIMAL_PLACES = 3;
1689 const int MAX_LANGUAGE_TAGS = 1000;
1690 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1691 char **language_tags = NULL;
1692 int num_langs = 0;
1693 const char *s = get_preferred_languages();
1694 int i;
1695 struct strbuf tag = STRBUF_INIT;
1696
1697 /* Don't add Accept-Language header if no language is preferred. */
1698 if (!s)
1699 return;
1700
1701 /*
1702 * Split the colon-separated string of preferred languages into
1703 * language_tags array.
1704 */
1705 do {
1706 /* collect language tag */
1707 for (; *s && (isalnum(*s) || *s == '_'); s++)
1708 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1709
1710 /* skip .codeset, @modifier and any other unnecessary parts */
1711 while (*s && *s != ':')
1712 s++;
1713
1714 if (tag.len) {
1715 num_langs++;
1716 REALLOC_ARRAY(language_tags, num_langs);
1717 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1718 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1719 break;
1720 }
1721 } while (*s++);
1722
1723 /* write Accept-Language header into buf */
1724 if (num_langs) {
1725 int last_buf_len = 0;
1726 int max_q;
1727 int decimal_places;
1728 char q_format[32];
1729
1730 /* add '*' */
1731 REALLOC_ARRAY(language_tags, num_langs + 1);
1732 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1733
1734 /* compute decimal_places */
1735 for (max_q = 1, decimal_places = 0;
1736 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1737 decimal_places++, max_q *= 10)
1738 ;
1739
1740 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1741
1742 strbuf_addstr(buf, "Accept-Language: ");
1743
1744 for (i = 0; i < num_langs; i++) {
1745 if (i > 0)
1746 strbuf_addstr(buf, ", ");
1747
1748 strbuf_addstr(buf, language_tags[i]);
1749
1750 if (i > 0)
1751 strbuf_addf(buf, q_format, max_q - i);
1752
1753 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1754 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1755 break;
1756 }
1757
1758 last_buf_len = buf->len;
1759 }
1760 }
1761
1762 /* free language tags -- last one is a static '*' */
1763 for (i = 0; i < num_langs - 1; i++)
1764 free(language_tags[i]);
1765 free(language_tags);
1766 }
1767
1768 /*
1769 * Get an Accept-Language header which indicates user's preferred languages.
1770 *
1771 * Examples:
1772 * LANGUAGE= -> ""
1773 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1774 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1775 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1776 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1777 * LANGUAGE= LANG=C -> ""
1778 */
1779 static const char *get_accept_language(void)
1780 {
1781 if (!cached_accept_language) {
1782 struct strbuf buf = STRBUF_INIT;
1783 write_accept_language(&buf);
1784 if (buf.len > 0)
1785 cached_accept_language = strbuf_detach(&buf, NULL);
1786 }
1787
1788 return cached_accept_language;
1789 }
1790
1791 static void http_opt_request_remainder(CURL *curl, off_t pos)
1792 {
1793 char buf[128];
1794 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1795 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1796 }
1797
1798 /* http_request() targets */
1799 #define HTTP_REQUEST_STRBUF 0
1800 #define HTTP_REQUEST_FILE 1
1801
1802 static int http_request(const char *url,
1803 void *result, int target,
1804 const struct http_get_options *options)
1805 {
1806 struct active_request_slot *slot;
1807 struct slot_results results;
1808 struct curl_slist *headers = http_copy_default_headers();
1809 struct strbuf buf = STRBUF_INIT;
1810 const char *accept_language;
1811 int ret;
1812
1813 slot = get_active_slot();
1814 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1815
1816 if (result == NULL) {
1817 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1818 } else {
1819 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1820 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1821
1822 if (target == HTTP_REQUEST_FILE) {
1823 off_t posn = ftello(result);
1824 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1825 fwrite);
1826 if (posn > 0)
1827 http_opt_request_remainder(slot->curl, posn);
1828 } else
1829 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1830 fwrite_buffer);
1831 }
1832
1833 accept_language = get_accept_language();
1834
1835 if (accept_language)
1836 headers = curl_slist_append(headers, accept_language);
1837
1838 strbuf_addstr(&buf, "Pragma:");
1839 if (options && options->no_cache)
1840 strbuf_addstr(&buf, " no-cache");
1841 if (options && options->keep_error)
1842 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1843 if (options && options->initial_request &&
1844 http_follow_config == HTTP_FOLLOW_INITIAL)
1845 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1846
1847 headers = curl_slist_append(headers, buf.buf);
1848
1849 /* Add additional headers here */
1850 if (options && options->extra_headers) {
1851 const struct string_list_item *item;
1852 for_each_string_list_item(item, options->extra_headers) {
1853 headers = curl_slist_append(headers, item->string);
1854 }
1855 }
1856
1857 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1858 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1859 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1860
1861 ret = run_one_slot(slot, &results);
1862
1863 if (options && options->content_type) {
1864 struct strbuf raw = STRBUF_INIT;
1865 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1866 extract_content_type(&raw, options->content_type,
1867 options->charset);
1868 strbuf_release(&raw);
1869 }
1870
1871 if (options && options->effective_url)
1872 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1873 options->effective_url);
1874
1875 curl_slist_free_all(headers);
1876 strbuf_release(&buf);
1877
1878 return ret;
1879 }
1880
1881 /*
1882 * Update the "base" url to a more appropriate value, as deduced by
1883 * redirects seen when requesting a URL starting with "url".
1884 *
1885 * The "asked" parameter is a URL that we asked curl to access, and must begin
1886 * with "base".
1887 *
1888 * The "got" parameter is the URL that curl reported to us as where we ended
1889 * up.
1890 *
1891 * Returns 1 if we updated the base url, 0 otherwise.
1892 *
1893 * Our basic strategy is to compare "base" and "asked" to find the bits
1894 * specific to our request. We then strip those bits off of "got" to yield the
1895 * new base. So for example, if our base is "http://example.com/foo.git",
1896 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1897 * with "https://other.example.com/foo.git/info/refs". We would want the
1898 * new URL to become "https://other.example.com/foo.git".
1899 *
1900 * Note that this assumes a sane redirect scheme. It's entirely possible
1901 * in the example above to end up at a URL that does not even end in
1902 * "info/refs". In such a case we die. There's not much we can do, such a
1903 * scheme is unlikely to represent a real git repository, and failing to
1904 * rewrite the base opens options for malicious redirects to do funny things.
1905 */
1906 static int update_url_from_redirect(struct strbuf *base,
1907 const char *asked,
1908 const struct strbuf *got)
1909 {
1910 const char *tail;
1911 size_t new_len;
1912
1913 if (!strcmp(asked, got->buf))
1914 return 0;
1915
1916 if (!skip_prefix(asked, base->buf, &tail))
1917 BUG("update_url_from_redirect: %s is not a superset of %s",
1918 asked, base->buf);
1919
1920 new_len = got->len;
1921 if (!strip_suffix_mem(got->buf, &new_len, tail))
1922 die(_("unable to update url base from redirection:\n"
1923 " asked for: %s\n"
1924 " redirect: %s"),
1925 asked, got->buf);
1926
1927 strbuf_reset(base);
1928 strbuf_add(base, got->buf, new_len);
1929
1930 return 1;
1931 }
1932
1933 static int http_request_reauth(const char *url,
1934 void *result, int target,
1935 struct http_get_options *options)
1936 {
1937 int ret = http_request(url, result, target, options);
1938
1939 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1940 return ret;
1941
1942 if (options && options->effective_url && options->base_url) {
1943 if (update_url_from_redirect(options->base_url,
1944 url, options->effective_url)) {
1945 credential_from_url(&http_auth, options->base_url->buf);
1946 url = options->effective_url->buf;
1947 }
1948 }
1949
1950 if (ret != HTTP_REAUTH)
1951 return ret;
1952
1953 /*
1954 * If we are using KEEP_ERROR, the previous request may have
1955 * put cruft into our output stream; we should clear it out before
1956 * making our next request. We only know how to do this for
1957 * the strbuf case, but that is enough to satisfy current callers.
1958 */
1959 if (options && options->keep_error) {
1960 switch (target) {
1961 case HTTP_REQUEST_STRBUF:
1962 strbuf_reset(result);
1963 break;
1964 default:
1965 BUG("HTTP_KEEP_ERROR is only supported with strbufs");
1966 }
1967 }
1968
1969 credential_fill(&http_auth);
1970
1971 return http_request(url, result, target, options);
1972 }
1973
1974 int http_get_strbuf(const char *url,
1975 struct strbuf *result,
1976 struct http_get_options *options)
1977 {
1978 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1979 }
1980
1981 /*
1982 * Downloads a URL and stores the result in the given file.
1983 *
1984 * If a previous interrupted download is detected (i.e. a previous temporary
1985 * file is still around) the download is resumed.
1986 */
1987 static int http_get_file(const char *url, const char *filename,
1988 struct http_get_options *options)
1989 {
1990 int ret;
1991 struct strbuf tmpfile = STRBUF_INIT;
1992 FILE *result;
1993
1994 strbuf_addf(&tmpfile, "%s.temp", filename);
1995 result = fopen(tmpfile.buf, "a");
1996 if (!result) {
1997 error("Unable to open local file %s", tmpfile.buf);
1998 ret = HTTP_ERROR;
1999 goto cleanup;
2000 }
2001
2002 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
2003 fclose(result);
2004
2005 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
2006 ret = HTTP_ERROR;
2007 cleanup:
2008 strbuf_release(&tmpfile);
2009 return ret;
2010 }
2011
2012 int http_fetch_ref(const char *base, struct ref *ref)
2013 {
2014 struct http_get_options options = {0};
2015 char *url;
2016 struct strbuf buffer = STRBUF_INIT;
2017 int ret = -1;
2018
2019 options.no_cache = 1;
2020
2021 url = quote_ref_url(base, ref->name);
2022 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
2023 strbuf_rtrim(&buffer);
2024 if (buffer.len == 40)
2025 ret = get_oid_hex(buffer.buf, &ref->old_oid);
2026 else if (starts_with(buffer.buf, "ref: ")) {
2027 ref->symref = xstrdup(buffer.buf + 5);
2028 ret = 0;
2029 }
2030 }
2031
2032 strbuf_release(&buffer);
2033 free(url);
2034 return ret;
2035 }
2036
2037 /* Helpers for fetching packs */
2038 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
2039 {
2040 char *url, *tmp;
2041 struct strbuf buf = STRBUF_INIT;
2042
2043 if (http_is_verbose)
2044 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
2045
2046 end_url_with_slash(&buf, base_url);
2047 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
2048 url = strbuf_detach(&buf, NULL);
2049
2050 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
2051 tmp = strbuf_detach(&buf, NULL);
2052
2053 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
2054 error("Unable to get pack index %s", url);
2055 FREE_AND_NULL(tmp);
2056 }
2057
2058 free(url);
2059 return tmp;
2060 }
2061
2062 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
2063 unsigned char *sha1, const char *base_url)
2064 {
2065 struct packed_git *new_pack;
2066 char *tmp_idx = NULL;
2067 int ret;
2068
2069 if (has_pack_index(sha1)) {
2070 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2071 if (!new_pack)
2072 return -1; /* parse_pack_index() already issued error message */
2073 goto add_pack;
2074 }
2075
2076 tmp_idx = fetch_pack_index(sha1, base_url);
2077 if (!tmp_idx)
2078 return -1;
2079
2080 new_pack = parse_pack_index(sha1, tmp_idx);
2081 if (!new_pack) {
2082 unlink(tmp_idx);
2083 free(tmp_idx);
2084
2085 return -1; /* parse_pack_index() already issued error message */
2086 }
2087
2088 ret = verify_pack_index(new_pack);
2089 if (!ret) {
2090 close_pack_index(new_pack);
2091 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2092 }
2093 free(tmp_idx);
2094 if (ret)
2095 return -1;
2096
2097 add_pack:
2098 new_pack->next = *packs_head;
2099 *packs_head = new_pack;
2100 return 0;
2101 }
2102
2103 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2104 {
2105 struct http_get_options options = {0};
2106 int ret = 0, i = 0;
2107 char *url, *data;
2108 struct strbuf buf = STRBUF_INIT;
2109 unsigned char hash[GIT_MAX_RAWSZ];
2110 const unsigned hexsz = the_hash_algo->hexsz;
2111
2112 end_url_with_slash(&buf, base_url);
2113 strbuf_addstr(&buf, "objects/info/packs");
2114 url = strbuf_detach(&buf, NULL);
2115
2116 options.no_cache = 1;
2117 ret = http_get_strbuf(url, &buf, &options);
2118 if (ret != HTTP_OK)
2119 goto cleanup;
2120
2121 data = buf.buf;
2122 while (i < buf.len) {
2123 switch (data[i]) {
2124 case 'P':
2125 i++;
2126 if (i + hexsz + 12 <= buf.len &&
2127 starts_with(data + i, " pack-") &&
2128 starts_with(data + i + hexsz + 6, ".pack\n")) {
2129 get_sha1_hex(data + i + 6, hash);
2130 fetch_and_setup_pack_index(packs_head, hash,
2131 base_url);
2132 i += hexsz + 11;
2133 break;
2134 }
2135 default:
2136 while (i < buf.len && data[i] != '\n')
2137 i++;
2138 }
2139 i++;
2140 }
2141
2142 cleanup:
2143 free(url);
2144 return ret;
2145 }
2146
2147 void release_http_pack_request(struct http_pack_request *preq)
2148 {
2149 if (preq->packfile != NULL) {
2150 fclose(preq->packfile);
2151 preq->packfile = NULL;
2152 }
2153 preq->slot = NULL;
2154 strbuf_release(&preq->tmpfile);
2155 free(preq->url);
2156 free(preq);
2157 }
2158
2159 int finish_http_pack_request(struct http_pack_request *preq)
2160 {
2161 struct packed_git **lst;
2162 struct packed_git *p = preq->target;
2163 char *tmp_idx;
2164 size_t len;
2165 struct child_process ip = CHILD_PROCESS_INIT;
2166
2167 close_pack_index(p);
2168
2169 fclose(preq->packfile);
2170 preq->packfile = NULL;
2171
2172 lst = preq->lst;
2173 while (*lst != p)
2174 lst = &((*lst)->next);
2175 *lst = (*lst)->next;
2176
2177 if (!strip_suffix(preq->tmpfile.buf, ".pack.temp", &len))
2178 BUG("pack tmpfile does not end in .pack.temp?");
2179 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile.buf);
2180
2181 argv_array_push(&ip.args, "index-pack");
2182 argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
2183 argv_array_push(&ip.args, preq->tmpfile.buf);
2184 ip.git_cmd = 1;
2185 ip.no_stdin = 1;
2186 ip.no_stdout = 1;
2187
2188 if (run_command(&ip)) {
2189 unlink(preq->tmpfile.buf);
2190 unlink(tmp_idx);
2191 free(tmp_idx);
2192 return -1;
2193 }
2194
2195 unlink(sha1_pack_index_name(p->sha1));
2196
2197 if (finalize_object_file(preq->tmpfile.buf, sha1_pack_name(p->sha1))
2198 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2199 free(tmp_idx);
2200 return -1;
2201 }
2202
2203 install_packed_git(the_repository, p);
2204 free(tmp_idx);
2205 return 0;
2206 }
2207
2208 struct http_pack_request *new_http_pack_request(
2209 struct packed_git *target, const char *base_url)
2210 {
2211 off_t prev_posn = 0;
2212 struct strbuf buf = STRBUF_INIT;
2213 struct http_pack_request *preq;
2214
2215 preq = xcalloc(1, sizeof(*preq));
2216 strbuf_init(&preq->tmpfile, 0);
2217 preq->target = target;
2218
2219 end_url_with_slash(&buf, base_url);
2220 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2221 sha1_to_hex(target->sha1));
2222 preq->url = strbuf_detach(&buf, NULL);
2223
2224 strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(target->sha1));
2225 preq->packfile = fopen(preq->tmpfile.buf, "a");
2226 if (!preq->packfile) {
2227 error("Unable to open local file %s for pack",
2228 preq->tmpfile.buf);
2229 goto abort;
2230 }
2231
2232 preq->slot = get_active_slot();
2233 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2234 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2235 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2236 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2237 no_pragma_header);
2238
2239 /*
2240 * If there is data present from a previous transfer attempt,
2241 * resume where it left off
2242 */
2243 prev_posn = ftello(preq->packfile);
2244 if (prev_posn>0) {
2245 if (http_is_verbose)
2246 fprintf(stderr,
2247 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2248 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2249 http_opt_request_remainder(preq->slot->curl, prev_posn);
2250 }
2251
2252 return preq;
2253
2254 abort:
2255 strbuf_release(&preq->tmpfile);
2256 free(preq->url);
2257 free(preq);
2258 return NULL;
2259 }
2260
2261 /* Helpers for fetching objects (loose) */
2262 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2263 void *data)
2264 {
2265 unsigned char expn[4096];
2266 size_t size = eltsize * nmemb;
2267 int posn = 0;
2268 struct http_object_request *freq = data;
2269 struct active_request_slot *slot = freq->slot;
2270
2271 if (slot) {
2272 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2273 &slot->http_code);
2274 if (c != CURLE_OK)
2275 BUG("curl_easy_getinfo for HTTP code failed: %s",
2276 curl_easy_strerror(c));
2277 if (slot->http_code >= 300)
2278 return size;
2279 }
2280
2281 do {
2282 ssize_t retval = xwrite(freq->localfile,
2283 (char *) ptr + posn, size - posn);
2284 if (retval < 0)
2285 return posn;
2286 posn += retval;
2287 } while (posn < size);
2288
2289 freq->stream.avail_in = size;
2290 freq->stream.next_in = (void *)ptr;
2291 do {
2292 freq->stream.next_out = expn;
2293 freq->stream.avail_out = sizeof(expn);
2294 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2295 git_SHA1_Update(&freq->c, expn,
2296 sizeof(expn) - freq->stream.avail_out);
2297 } while (freq->stream.avail_in && freq->zret == Z_OK);
2298 return size;
2299 }
2300
2301 struct http_object_request *new_http_object_request(const char *base_url,
2302 unsigned char *sha1)
2303 {
2304 char *hex = sha1_to_hex(sha1);
2305 struct strbuf filename = STRBUF_INIT;
2306 struct strbuf prevfile = STRBUF_INIT;
2307 int prevlocal;
2308 char prev_buf[PREV_BUF_SIZE];
2309 ssize_t prev_read = 0;
2310 off_t prev_posn = 0;
2311 struct http_object_request *freq;
2312
2313 freq = xcalloc(1, sizeof(*freq));
2314 strbuf_init(&freq->tmpfile, 0);
2315 hashcpy(freq->sha1, sha1);
2316 freq->localfile = -1;
2317
2318 sha1_file_name(the_repository, &filename, sha1);
2319 strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
2320
2321 strbuf_addf(&prevfile, "%s.prev", filename.buf);
2322 unlink_or_warn(prevfile.buf);
2323 rename(freq->tmpfile.buf, prevfile.buf);
2324 unlink_or_warn(freq->tmpfile.buf);
2325 strbuf_release(&filename);
2326
2327 if (freq->localfile != -1)
2328 error("fd leakage in start: %d", freq->localfile);
2329 freq->localfile = open(freq->tmpfile.buf,
2330 O_WRONLY | O_CREAT | O_EXCL, 0666);
2331 /*
2332 * This could have failed due to the "lazy directory creation";
2333 * try to mkdir the last path component.
2334 */
2335 if (freq->localfile < 0 && errno == ENOENT) {
2336 char *dir = strrchr(freq->tmpfile.buf, '/');
2337 if (dir) {
2338 *dir = 0;
2339 mkdir(freq->tmpfile.buf, 0777);
2340 *dir = '/';
2341 }
2342 freq->localfile = open(freq->tmpfile.buf,
2343 O_WRONLY | O_CREAT | O_EXCL, 0666);
2344 }
2345
2346 if (freq->localfile < 0) {
2347 error_errno("Couldn't create temporary file %s",
2348 freq->tmpfile.buf);
2349 goto abort;
2350 }
2351
2352 git_inflate_init(&freq->stream);
2353
2354 git_SHA1_Init(&freq->c);
2355
2356 freq->url = get_remote_object_url(base_url, hex, 0);
2357
2358 /*
2359 * If a previous temp file is present, process what was already
2360 * fetched.
2361 */
2362 prevlocal = open(prevfile.buf, O_RDONLY);
2363 if (prevlocal != -1) {
2364 do {
2365 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2366 if (prev_read>0) {
2367 if (fwrite_sha1_file(prev_buf,
2368 1,
2369 prev_read,
2370 freq) == prev_read) {
2371 prev_posn += prev_read;
2372 } else {
2373 prev_read = -1;
2374 }
2375 }
2376 } while (prev_read > 0);
2377 close(prevlocal);
2378 }
2379 unlink_or_warn(prevfile.buf);
2380 strbuf_release(&prevfile);
2381
2382 /*
2383 * Reset inflate/SHA1 if there was an error reading the previous temp
2384 * file; also rewind to the beginning of the local file.
2385 */
2386 if (prev_read == -1) {
2387 memset(&freq->stream, 0, sizeof(freq->stream));
2388 git_inflate_init(&freq->stream);
2389 git_SHA1_Init(&freq->c);
2390 if (prev_posn>0) {
2391 prev_posn = 0;
2392 lseek(freq->localfile, 0, SEEK_SET);
2393 if (ftruncate(freq->localfile, 0) < 0) {
2394 error_errno("Couldn't truncate temporary file %s",
2395 freq->tmpfile.buf);
2396 goto abort;
2397 }
2398 }
2399 }
2400
2401 freq->slot = get_active_slot();
2402
2403 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2404 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2405 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2406 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2407 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2408 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2409
2410 /*
2411 * If we have successfully processed data from a previous fetch
2412 * attempt, only fetch the data we don't already have.
2413 */
2414 if (prev_posn>0) {
2415 if (http_is_verbose)
2416 fprintf(stderr,
2417 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2418 hex, (uintmax_t)prev_posn);
2419 http_opt_request_remainder(freq->slot->curl, prev_posn);
2420 }
2421
2422 return freq;
2423
2424 abort:
2425 strbuf_release(&prevfile);
2426 free(freq->url);
2427 free(freq);
2428 return NULL;
2429 }
2430
2431 void process_http_object_request(struct http_object_request *freq)
2432 {
2433 if (freq->slot == NULL)
2434 return;
2435 freq->curl_result = freq->slot->curl_result;
2436 freq->http_code = freq->slot->http_code;
2437 freq->slot = NULL;
2438 }
2439
2440 int finish_http_object_request(struct http_object_request *freq)
2441 {
2442 struct stat st;
2443 struct strbuf filename = STRBUF_INIT;
2444
2445 close(freq->localfile);
2446 freq->localfile = -1;
2447
2448 process_http_object_request(freq);
2449
2450 if (freq->http_code == 416) {
2451 warning("requested range invalid; we may already have all the data.");
2452 } else if (freq->curl_result != CURLE_OK) {
2453 if (stat(freq->tmpfile.buf, &st) == 0)
2454 if (st.st_size == 0)
2455 unlink_or_warn(freq->tmpfile.buf);
2456 return -1;
2457 }
2458
2459 git_inflate_end(&freq->stream);
2460 git_SHA1_Final(freq->real_sha1, &freq->c);
2461 if (freq->zret != Z_STREAM_END) {
2462 unlink_or_warn(freq->tmpfile.buf);
2463 return -1;
2464 }
2465 if (!hasheq(freq->sha1, freq->real_sha1)) {
2466 unlink_or_warn(freq->tmpfile.buf);
2467 return -1;
2468 }
2469 sha1_file_name(the_repository, &filename, freq->sha1);
2470 freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
2471 strbuf_release(&filename);
2472
2473 return freq->rename;
2474 }
2475
2476 void abort_http_object_request(struct http_object_request *freq)
2477 {
2478 unlink_or_warn(freq->tmpfile.buf);
2479
2480 release_http_object_request(freq);
2481 }
2482
2483 void release_http_object_request(struct http_object_request *freq)
2484 {
2485 if (freq->localfile != -1) {
2486 close(freq->localfile);
2487 freq->localfile = -1;
2488 }
2489 FREE_AND_NULL(freq->url);
2490 if (freq->slot != NULL) {
2491 freq->slot->callback_func = NULL;
2492 freq->slot->callback_data = NULL;
2493 release_active_slot(freq->slot);
2494 freq->slot = NULL;
2495 }
2496 strbuf_release(&freq->tmpfile);
2497 }
git for Debian