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Git 2.18.4
[git/debian.git] / http.c
blob3fdc7a7328a1cf11deec16e37382258d0b92351c
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 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
159 {
160 size_t size = eltsize * nmemb;
161 struct buffer *buffer = buffer_;
162
163 if (size > buffer->buf.len - buffer->posn)
164 size = buffer->buf.len - buffer->posn;
165 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
166 buffer->posn += size;
167
168 return size;
169 }
170
171 #ifndef NO_CURL_IOCTL
172 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
173 {
174 struct buffer *buffer = clientp;
175
176 switch (cmd) {
177 case CURLIOCMD_NOP:
178 return CURLIOE_OK;
179
180 case CURLIOCMD_RESTARTREAD:
181 buffer->posn = 0;
182 return CURLIOE_OK;
183
184 default:
185 return CURLIOE_UNKNOWNCMD;
186 }
187 }
188 #endif
189
190 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
191 {
192 size_t size = eltsize * nmemb;
193 struct strbuf *buffer = buffer_;
194
195 strbuf_add(buffer, ptr, size);
196 return size;
197 }
198
199 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
200 {
201 return eltsize * nmemb;
202 }
203
204 static void closedown_active_slot(struct active_request_slot *slot)
205 {
206 active_requests--;
207 slot->in_use = 0;
208 }
209
210 static void finish_active_slot(struct active_request_slot *slot)
211 {
212 closedown_active_slot(slot);
213 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
214
215 if (slot->finished != NULL)
216 (*slot->finished) = 1;
217
218 /* Store slot results so they can be read after the slot is reused */
219 if (slot->results != NULL) {
220 slot->results->curl_result = slot->curl_result;
221 slot->results->http_code = slot->http_code;
222 #if LIBCURL_VERSION_NUM >= 0x070a08
223 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
224 &slot->results->auth_avail);
225 #else
226 slot->results->auth_avail = 0;
227 #endif
228
229 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
230 &slot->results->http_connectcode);
231 }
232
233 /* Run callback if appropriate */
234 if (slot->callback_func != NULL)
235 slot->callback_func(slot->callback_data);
236 }
237
238 static void xmulti_remove_handle(struct active_request_slot *slot)
239 {
240 #ifdef USE_CURL_MULTI
241 curl_multi_remove_handle(curlm, slot->curl);
242 #endif
243 }
244
245 #ifdef USE_CURL_MULTI
246 static void process_curl_messages(void)
247 {
248 int num_messages;
249 struct active_request_slot *slot;
250 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
251
252 while (curl_message != NULL) {
253 if (curl_message->msg == CURLMSG_DONE) {
254 int curl_result = curl_message->data.result;
255 slot = active_queue_head;
256 while (slot != NULL &&
257 slot->curl != curl_message->easy_handle)
258 slot = slot->next;
259 if (slot != NULL) {
260 xmulti_remove_handle(slot);
261 slot->curl_result = curl_result;
262 finish_active_slot(slot);
263 } else {
264 fprintf(stderr, "Received DONE message for unknown request!\n");
265 }
266 } else {
267 fprintf(stderr, "Unknown CURL message received: %d\n",
268 (int)curl_message->msg);
269 }
270 curl_message = curl_multi_info_read(curlm, &num_messages);
271 }
272 }
273 #endif
274
275 static int http_options(const char *var, const char *value, void *cb)
276 {
277 if (!strcmp("http.sslverify", var)) {
278 curl_ssl_verify = git_config_bool(var, value);
279 return 0;
280 }
281 if (!strcmp("http.sslcipherlist", var))
282 return git_config_string(&ssl_cipherlist, var, value);
283 if (!strcmp("http.sslversion", var))
284 return git_config_string(&ssl_version, var, value);
285 if (!strcmp("http.sslcert", var))
286 return git_config_pathname(&ssl_cert, var, value);
287 #if LIBCURL_VERSION_NUM >= 0x070903
288 if (!strcmp("http.sslkey", var))
289 return git_config_pathname(&ssl_key, var, value);
290 #endif
291 #if LIBCURL_VERSION_NUM >= 0x070908
292 if (!strcmp("http.sslcapath", var))
293 return git_config_pathname(&ssl_capath, var, value);
294 #endif
295 if (!strcmp("http.sslcainfo", var))
296 return git_config_pathname(&ssl_cainfo, var, value);
297 if (!strcmp("http.sslcertpasswordprotected", var)) {
298 ssl_cert_password_required = git_config_bool(var, value);
299 return 0;
300 }
301 if (!strcmp("http.ssltry", var)) {
302 curl_ssl_try = git_config_bool(var, value);
303 return 0;
304 }
305 if (!strcmp("http.minsessions", var)) {
306 min_curl_sessions = git_config_int(var, value);
307 #ifndef USE_CURL_MULTI
308 if (min_curl_sessions > 1)
309 min_curl_sessions = 1;
310 #endif
311 return 0;
312 }
313 #ifdef USE_CURL_MULTI
314 if (!strcmp("http.maxrequests", var)) {
315 max_requests = git_config_int(var, value);
316 return 0;
317 }
318 #endif
319 if (!strcmp("http.lowspeedlimit", var)) {
320 curl_low_speed_limit = (long)git_config_int(var, value);
321 return 0;
322 }
323 if (!strcmp("http.lowspeedtime", var)) {
324 curl_low_speed_time = (long)git_config_int(var, value);
325 return 0;
326 }
327
328 if (!strcmp("http.noepsv", var)) {
329 curl_ftp_no_epsv = git_config_bool(var, value);
330 return 0;
331 }
332 if (!strcmp("http.proxy", var))
333 return git_config_string(&curl_http_proxy, var, value);
334
335 if (!strcmp("http.proxyauthmethod", var))
336 return git_config_string(&http_proxy_authmethod, var, value);
337
338 if (!strcmp("http.cookiefile", var))
339 return git_config_pathname(&curl_cookie_file, var, value);
340 if (!strcmp("http.savecookies", var)) {
341 curl_save_cookies = git_config_bool(var, value);
342 return 0;
343 }
344
345 if (!strcmp("http.postbuffer", var)) {
346 http_post_buffer = git_config_ssize_t(var, value);
347 if (http_post_buffer < 0)
348 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
349 if (http_post_buffer < LARGE_PACKET_MAX)
350 http_post_buffer = LARGE_PACKET_MAX;
351 return 0;
352 }
353
354 if (!strcmp("http.useragent", var))
355 return git_config_string(&user_agent, var, value);
356
357 if (!strcmp("http.emptyauth", var)) {
358 if (value && !strcmp("auto", value))
359 curl_empty_auth = -1;
360 else
361 curl_empty_auth = git_config_bool(var, value);
362 return 0;
363 }
364
365 if (!strcmp("http.delegation", var)) {
366 #ifdef CURLGSSAPI_DELEGATION_FLAG
367 return git_config_string(&curl_deleg, var, value);
368 #else
369 warning(_("Delegation control is not supported with cURL < 7.22.0"));
370 return 0;
371 #endif
372 }
373
374 if (!strcmp("http.pinnedpubkey", var)) {
375 #if LIBCURL_VERSION_NUM >= 0x072c00
376 return git_config_pathname(&ssl_pinnedkey, var, value);
377 #else
378 warning(_("Public key pinning not supported with cURL < 7.44.0"));
379 return 0;
380 #endif
381 }
382
383 if (!strcmp("http.extraheader", var)) {
384 if (!value) {
385 return config_error_nonbool(var);
386 } else if (!*value) {
387 curl_slist_free_all(extra_http_headers);
388 extra_http_headers = NULL;
389 } else {
390 extra_http_headers =
391 curl_slist_append(extra_http_headers, value);
392 }
393 return 0;
394 }
395
396 if (!strcmp("http.followredirects", var)) {
397 if (value && !strcmp(value, "initial"))
398 http_follow_config = HTTP_FOLLOW_INITIAL;
399 else if (git_config_bool(var, value))
400 http_follow_config = HTTP_FOLLOW_ALWAYS;
401 else
402 http_follow_config = HTTP_FOLLOW_NONE;
403 return 0;
404 }
405
406 /* Fall back on the default ones */
407 return git_default_config(var, value, cb);
408 }
409
410 static int curl_empty_auth_enabled(void)
411 {
412 if (curl_empty_auth >= 0)
413 return curl_empty_auth;
414
415 #ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
416 /*
417 * Our libcurl is too old to do AUTH_ANY in the first place;
418 * just default to turning the feature off.
419 */
420 #else
421 /*
422 * In the automatic case, kick in the empty-auth
423 * hack as long as we would potentially try some
424 * method more exotic than "Basic" or "Digest".
425 *
426 * But only do this when this is our second or
427 * subsequent request, as by then we know what
428 * methods are available.
429 */
430 if (http_auth_methods_restricted &&
431 (http_auth_methods & ~empty_auth_useless))
432 return 1;
433 #endif
434 return 0;
435 }
436
437 static void init_curl_http_auth(CURL *result)
438 {
439 if (!http_auth.username || !*http_auth.username) {
440 if (curl_empty_auth_enabled())
441 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
442 return;
443 }
444
445 credential_fill(&http_auth);
446
447 #if LIBCURL_VERSION_NUM >= 0x071301
448 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
449 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
450 #else
451 {
452 static struct strbuf up = STRBUF_INIT;
453 /*
454 * Note that we assume we only ever have a single set of
455 * credentials in a given program run, so we do not have
456 * to worry about updating this buffer, only setting its
457 * initial value.
458 */
459 if (!up.len)
460 strbuf_addf(&up, "%s:%s",
461 http_auth.username, http_auth.password);
462 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
463 }
464 #endif
465 }
466
467 /* *var must be free-able */
468 static void var_override(const char **var, char *value)
469 {
470 if (value) {
471 free((void *)*var);
472 *var = xstrdup(value);
473 }
474 }
475
476 static void set_proxyauth_name_password(CURL *result)
477 {
478 #if LIBCURL_VERSION_NUM >= 0x071301
479 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
480 proxy_auth.username);
481 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
482 proxy_auth.password);
483 #else
484 struct strbuf s = STRBUF_INIT;
485
486 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
487 strbuf_addch(&s, ':');
488 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
489 curl_proxyuserpwd = strbuf_detach(&s, NULL);
490 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
491 #endif
492 }
493
494 static void init_curl_proxy_auth(CURL *result)
495 {
496 if (proxy_auth.username) {
497 if (!proxy_auth.password)
498 credential_fill(&proxy_auth);
499 set_proxyauth_name_password(result);
500 }
501
502 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
503
504 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
505 if (http_proxy_authmethod) {
506 int i;
507 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
508 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
509 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
510 proxy_authmethods[i].curlauth_param);
511 break;
512 }
513 }
514 if (i == ARRAY_SIZE(proxy_authmethods)) {
515 warning("unsupported proxy authentication method %s: using anyauth",
516 http_proxy_authmethod);
517 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
518 }
519 }
520 else
521 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
522 #endif
523 }
524
525 static int has_cert_password(void)
526 {
527 if (ssl_cert == NULL || ssl_cert_password_required != 1)
528 return 0;
529 if (!cert_auth.password) {
530 cert_auth.protocol = xstrdup("cert");
531 cert_auth.host = xstrdup("");
532 cert_auth.username = xstrdup("");
533 cert_auth.path = xstrdup(ssl_cert);
534 credential_fill(&cert_auth);
535 }
536 return 1;
537 }
538
539 #if LIBCURL_VERSION_NUM >= 0x071900
540 static void set_curl_keepalive(CURL *c)
541 {
542 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
543 }
544
545 #elif LIBCURL_VERSION_NUM >= 0x071000
546 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
547 {
548 int ka = 1;
549 int rc;
550 socklen_t len = (socklen_t)sizeof(ka);
551
552 if (type != CURLSOCKTYPE_IPCXN)
553 return 0;
554
555 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
556 if (rc < 0)
557 warning_errno("unable to set SO_KEEPALIVE on socket");
558
559 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
560 }
561
562 static void set_curl_keepalive(CURL *c)
563 {
564 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
565 }
566
567 #else
568 static void set_curl_keepalive(CURL *c)
569 {
570 /* not supported on older curl versions */
571 }
572 #endif
573
574 static void redact_sensitive_header(struct strbuf *header)
575 {
576 const char *sensitive_header;
577
578 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
579 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
580 /* The first token is the type, which is OK to log */
581 while (isspace(*sensitive_header))
582 sensitive_header++;
583 while (*sensitive_header && !isspace(*sensitive_header))
584 sensitive_header++;
585 /* Everything else is opaque and possibly sensitive */
586 strbuf_setlen(header, sensitive_header - header->buf);
587 strbuf_addstr(header, " <redacted>");
588 } else if (cookies_to_redact.nr &&
589 skip_prefix(header->buf, "Cookie:", &sensitive_header)) {
590 struct strbuf redacted_header = STRBUF_INIT;
591 char *cookie;
592
593 while (isspace(*sensitive_header))
594 sensitive_header++;
595
596 /*
597 * The contents of header starting from sensitive_header will
598 * subsequently be overridden, so it is fine to mutate this
599 * string (hence the assignment to "char *").
600 */
601 cookie = (char *) sensitive_header;
602
603 while (cookie) {
604 char *equals;
605 char *semicolon = strstr(cookie, "; ");
606 if (semicolon)
607 *semicolon = 0;
608 equals = strchrnul(cookie, '=');
609 if (!equals) {
610 /* invalid cookie, just append and continue */
611 strbuf_addstr(&redacted_header, cookie);
612 continue;
613 }
614 *equals = 0; /* temporarily set to NUL for lookup */
615 if (string_list_lookup(&cookies_to_redact, cookie)) {
616 strbuf_addstr(&redacted_header, cookie);
617 strbuf_addstr(&redacted_header, "=<redacted>");
618 } else {
619 *equals = '=';
620 strbuf_addstr(&redacted_header, cookie);
621 }
622 if (semicolon) {
623 /*
624 * There are more cookies. (Or, for some
625 * reason, the input string ends in "; ".)
626 */
627 strbuf_addstr(&redacted_header, "; ");
628 cookie = semicolon + strlen("; ");
629 } else {
630 cookie = NULL;
631 }
632 }
633
634 strbuf_setlen(header, sensitive_header - header->buf);
635 strbuf_addbuf(header, &redacted_header);
636 }
637 }
638
639 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
640 {
641 struct strbuf out = STRBUF_INIT;
642 struct strbuf **headers, **header;
643
644 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
645 text, (long)size, (long)size);
646 trace_strbuf(&trace_curl, &out);
647 strbuf_reset(&out);
648 strbuf_add(&out, ptr, size);
649 headers = strbuf_split_max(&out, '\n', 0);
650
651 for (header = headers; *header; header++) {
652 if (hide_sensitive_header)
653 redact_sensitive_header(*header);
654 strbuf_insert((*header), 0, text, strlen(text));
655 strbuf_insert((*header), strlen(text), ": ", 2);
656 strbuf_rtrim((*header));
657 strbuf_addch((*header), '\n');
658 trace_strbuf(&trace_curl, (*header));
659 }
660 strbuf_list_free(headers);
661 strbuf_release(&out);
662 }
663
664 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
665 {
666 size_t i;
667 struct strbuf out = STRBUF_INIT;
668 unsigned int width = 60;
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
674 for (i = 0; i < size; i += width) {
675 size_t w;
676
677 strbuf_reset(&out);
678 strbuf_addf(&out, "%s: ", text);
679 for (w = 0; (w < width) && (i + w < size); w++) {
680 unsigned char ch = ptr[i + w];
681
682 strbuf_addch(&out,
683 (ch >= 0x20) && (ch < 0x80)
684 ? ch : '.');
685 }
686 strbuf_addch(&out, '\n');
687 trace_strbuf(&trace_curl, &out);
688 }
689 strbuf_release(&out);
690 }
691
692 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
693 {
694 const char *text;
695 enum { NO_FILTER = 0, DO_FILTER = 1 };
696
697 switch (type) {
698 case CURLINFO_TEXT:
699 trace_printf_key(&trace_curl, "== Info: %s", data);
700 break;
701 case CURLINFO_HEADER_OUT:
702 text = "=> Send header";
703 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
704 break;
705 case CURLINFO_DATA_OUT:
706 if (trace_curl_data) {
707 text = "=> Send data";
708 curl_dump_data(text, (unsigned char *)data, size);
709 }
710 break;
711 case CURLINFO_SSL_DATA_OUT:
712 if (trace_curl_data) {
713 text = "=> Send SSL data";
714 curl_dump_data(text, (unsigned char *)data, size);
715 }
716 break;
717 case CURLINFO_HEADER_IN:
718 text = "<= Recv header";
719 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
720 break;
721 case CURLINFO_DATA_IN:
722 if (trace_curl_data) {
723 text = "<= Recv data";
724 curl_dump_data(text, (unsigned char *)data, size);
725 }
726 break;
727 case CURLINFO_SSL_DATA_IN:
728 if (trace_curl_data) {
729 text = "<= Recv SSL data";
730 curl_dump_data(text, (unsigned char *)data, size);
731 }
732 break;
733
734 default: /* we ignore unknown types by default */
735 return 0;
736 }
737 return 0;
738 }
739
740 void setup_curl_trace(CURL *handle)
741 {
742 if (!trace_want(&trace_curl))
743 return;
744 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
745 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
746 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
747 }
748
749 #ifdef CURLPROTO_HTTP
750 static long get_curl_allowed_protocols(int from_user)
751 {
752 long allowed_protocols = 0;
753
754 if (is_transport_allowed("http", from_user))
755 allowed_protocols |= CURLPROTO_HTTP;
756 if (is_transport_allowed("https", from_user))
757 allowed_protocols |= CURLPROTO_HTTPS;
758 if (is_transport_allowed("ftp", from_user))
759 allowed_protocols |= CURLPROTO_FTP;
760 if (is_transport_allowed("ftps", from_user))
761 allowed_protocols |= CURLPROTO_FTPS;
762
763 return allowed_protocols;
764 }
765 #endif
766
767 static CURL *get_curl_handle(void)
768 {
769 CURL *result = curl_easy_init();
770
771 if (!result)
772 die("curl_easy_init failed");
773
774 if (!curl_ssl_verify) {
775 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
776 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
777 } else {
778 /* Verify authenticity of the peer's certificate */
779 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
780 /* The name in the cert must match whom we tried to connect */
781 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
782 }
783
784 #if LIBCURL_VERSION_NUM >= 0x070907
785 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
786 #endif
787 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
788 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
789 #endif
790
791 #ifdef CURLGSSAPI_DELEGATION_FLAG
792 if (curl_deleg) {
793 int i;
794 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
795 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
796 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
797 curl_deleg_levels[i].curl_deleg_param);
798 break;
799 }
800 }
801 if (i == ARRAY_SIZE(curl_deleg_levels))
802 warning("Unknown delegation method '%s': using default",
803 curl_deleg);
804 }
805 #endif
806
807 if (http_proactive_auth)
808 init_curl_http_auth(result);
809
810 if (getenv("GIT_SSL_VERSION"))
811 ssl_version = getenv("GIT_SSL_VERSION");
812 if (ssl_version && *ssl_version) {
813 int i;
814 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
815 if (!strcmp(ssl_version, sslversions[i].name)) {
816 curl_easy_setopt(result, CURLOPT_SSLVERSION,
817 sslversions[i].ssl_version);
818 break;
819 }
820 }
821 if (i == ARRAY_SIZE(sslversions))
822 warning("unsupported ssl version %s: using default",
823 ssl_version);
824 }
825
826 if (getenv("GIT_SSL_CIPHER_LIST"))
827 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
828 if (ssl_cipherlist != NULL && *ssl_cipherlist)
829 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
830 ssl_cipherlist);
831
832 if (ssl_cert != NULL)
833 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
834 if (has_cert_password())
835 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
836 #if LIBCURL_VERSION_NUM >= 0x070903
837 if (ssl_key != NULL)
838 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
839 #endif
840 #if LIBCURL_VERSION_NUM >= 0x070908
841 if (ssl_capath != NULL)
842 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
843 #endif
844 #if LIBCURL_VERSION_NUM >= 0x072c00
845 if (ssl_pinnedkey != NULL)
846 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
847 #endif
848 if (ssl_cainfo != NULL)
849 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
850
851 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
852 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
853 curl_low_speed_limit);
854 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
855 curl_low_speed_time);
856 }
857
858 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
859 #if LIBCURL_VERSION_NUM >= 0x071301
860 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
861 #elif LIBCURL_VERSION_NUM >= 0x071101
862 curl_easy_setopt(result, CURLOPT_POST301, 1);
863 #endif
864 #ifdef CURLPROTO_HTTP
865 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
866 get_curl_allowed_protocols(0));
867 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
868 get_curl_allowed_protocols(-1));
869 #else
870 warning("protocol restrictions not applied to curl redirects because\n"
871 "your curl version is too old (>= 7.19.4)");
872 #endif
873 if (getenv("GIT_CURL_VERBOSE"))
874 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
875 setup_curl_trace(result);
876 if (getenv("GIT_TRACE_CURL_NO_DATA"))
877 trace_curl_data = 0;
878 if (getenv("GIT_REDACT_COOKIES")) {
879 string_list_split(&cookies_to_redact,
880 getenv("GIT_REDACT_COOKIES"), ',', -1);
881 string_list_sort(&cookies_to_redact);
882 }
883
884 curl_easy_setopt(result, CURLOPT_USERAGENT,
885 user_agent ? user_agent : git_user_agent());
886
887 if (curl_ftp_no_epsv)
888 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
889
890 #ifdef CURLOPT_USE_SSL
891 if (curl_ssl_try)
892 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
893 #endif
894
895 /*
896 * CURL also examines these variables as a fallback; but we need to query
897 * them here in order to decide whether to prompt for missing password (cf.
898 * init_curl_proxy_auth()).
899 *
900 * Unlike many other common environment variables, these are historically
901 * lowercase only. It appears that CURL did not know this and implemented
902 * only uppercase variants, which was later corrected to take both - with
903 * the exception of http_proxy, which is lowercase only also in CURL. As
904 * the lowercase versions are the historical quasi-standard, they take
905 * precedence here, as in CURL.
906 */
907 if (!curl_http_proxy) {
908 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
909 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
910 var_override(&curl_http_proxy, getenv("https_proxy"));
911 } else {
912 var_override(&curl_http_proxy, getenv("http_proxy"));
913 }
914 if (!curl_http_proxy) {
915 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
916 var_override(&curl_http_proxy, getenv("all_proxy"));
917 }
918 }
919
920 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
921 /*
922 * Handle case with the empty http.proxy value here to keep
923 * common code clean.
924 * NB: empty option disables proxying at all.
925 */
926 curl_easy_setopt(result, CURLOPT_PROXY, "");
927 } else if (curl_http_proxy) {
928 #if LIBCURL_VERSION_NUM >= 0x071800
929 if (starts_with(curl_http_proxy, "socks5h"))
930 curl_easy_setopt(result,
931 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
932 else if (starts_with(curl_http_proxy, "socks5"))
933 curl_easy_setopt(result,
934 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
935 else if (starts_with(curl_http_proxy, "socks4a"))
936 curl_easy_setopt(result,
937 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
938 else if (starts_with(curl_http_proxy, "socks"))
939 curl_easy_setopt(result,
940 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
941 #endif
942 #if LIBCURL_VERSION_NUM >= 0x073400
943 else if (starts_with(curl_http_proxy, "https"))
944 curl_easy_setopt(result,
945 CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
946 #endif
947 if (strstr(curl_http_proxy, "://"))
948 credential_from_url(&proxy_auth, curl_http_proxy);
949 else {
950 struct strbuf url = STRBUF_INIT;
951 strbuf_addf(&url, "http://%s", curl_http_proxy);
952 credential_from_url(&proxy_auth, url.buf);
953 strbuf_release(&url);
954 }
955
956 if (!proxy_auth.host)
957 die("Invalid proxy URL '%s'", curl_http_proxy);
958
959 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
960 #if LIBCURL_VERSION_NUM >= 0x071304
961 var_override(&curl_no_proxy, getenv("NO_PROXY"));
962 var_override(&curl_no_proxy, getenv("no_proxy"));
963 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
964 #endif
965 }
966 init_curl_proxy_auth(result);
967
968 set_curl_keepalive(result);
969
970 return result;
971 }
972
973 static void set_from_env(const char **var, const char *envname)
974 {
975 const char *val = getenv(envname);
976 if (val)
977 *var = val;
978 }
979
980 void http_init(struct remote *remote, const char *url, int proactive_auth)
981 {
982 char *low_speed_limit;
983 char *low_speed_time;
984 char *normalized_url;
985 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
986
987 config.section = "http";
988 config.key = NULL;
989 config.collect_fn = http_options;
990 config.cascade_fn = git_default_config;
991 config.cb = NULL;
992
993 http_is_verbose = 0;
994 normalized_url = url_normalize(url, &config.url);
995
996 git_config(urlmatch_config_entry, &config);
997 free(normalized_url);
998
999 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1000 die("curl_global_init failed");
1001
1002 http_proactive_auth = proactive_auth;
1003
1004 if (remote && remote->http_proxy)
1005 curl_http_proxy = xstrdup(remote->http_proxy);
1006
1007 if (remote)
1008 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
1009
1010 pragma_header = curl_slist_append(http_copy_default_headers(),
1011 "Pragma: no-cache");
1012 no_pragma_header = curl_slist_append(http_copy_default_headers(),
1013 "Pragma:");
1014
1015 #ifdef USE_CURL_MULTI
1016 {
1017 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
1018 if (http_max_requests != NULL)
1019 max_requests = atoi(http_max_requests);
1020 }
1021
1022 curlm = curl_multi_init();
1023 if (!curlm)
1024 die("curl_multi_init failed");
1025 #endif
1026
1027 if (getenv("GIT_SSL_NO_VERIFY"))
1028 curl_ssl_verify = 0;
1029
1030 set_from_env(&ssl_cert, "GIT_SSL_CERT");
1031 #if LIBCURL_VERSION_NUM >= 0x070903
1032 set_from_env(&ssl_key, "GIT_SSL_KEY");
1033 #endif
1034 #if LIBCURL_VERSION_NUM >= 0x070908
1035 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
1036 #endif
1037 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
1038
1039 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
1040
1041 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
1042 if (low_speed_limit != NULL)
1043 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
1044 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
1045 if (low_speed_time != NULL)
1046 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
1047
1048 if (curl_ssl_verify == -1)
1049 curl_ssl_verify = 1;
1050
1051 curl_session_count = 0;
1052 #ifdef USE_CURL_MULTI
1053 if (max_requests < 1)
1054 max_requests = DEFAULT_MAX_REQUESTS;
1055 #endif
1056
1057 if (getenv("GIT_CURL_FTP_NO_EPSV"))
1058 curl_ftp_no_epsv = 1;
1059
1060 if (url) {
1061 credential_from_url(&http_auth, url);
1062 if (!ssl_cert_password_required &&
1063 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1064 starts_with(url, "https://"))
1065 ssl_cert_password_required = 1;
1066 }
1067
1068 #ifndef NO_CURL_EASY_DUPHANDLE
1069 curl_default = get_curl_handle();
1070 #endif
1071 }
1072
1073 void http_cleanup(void)
1074 {
1075 struct active_request_slot *slot = active_queue_head;
1076
1077 while (slot != NULL) {
1078 struct active_request_slot *next = slot->next;
1079 if (slot->curl != NULL) {
1080 xmulti_remove_handle(slot);
1081 curl_easy_cleanup(slot->curl);
1082 }
1083 free(slot);
1084 slot = next;
1085 }
1086 active_queue_head = NULL;
1087
1088 #ifndef NO_CURL_EASY_DUPHANDLE
1089 curl_easy_cleanup(curl_default);
1090 #endif
1091
1092 #ifdef USE_CURL_MULTI
1093 curl_multi_cleanup(curlm);
1094 #endif
1095 curl_global_cleanup();
1096
1097 curl_slist_free_all(extra_http_headers);
1098 extra_http_headers = NULL;
1099
1100 curl_slist_free_all(pragma_header);
1101 pragma_header = NULL;
1102
1103 curl_slist_free_all(no_pragma_header);
1104 no_pragma_header = NULL;
1105
1106 if (curl_http_proxy) {
1107 free((void *)curl_http_proxy);
1108 curl_http_proxy = NULL;
1109 }
1110
1111 if (proxy_auth.password) {
1112 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1113 FREE_AND_NULL(proxy_auth.password);
1114 }
1115
1116 free((void *)curl_proxyuserpwd);
1117 curl_proxyuserpwd = NULL;
1118
1119 free((void *)http_proxy_authmethod);
1120 http_proxy_authmethod = NULL;
1121
1122 if (cert_auth.password != NULL) {
1123 memset(cert_auth.password, 0, strlen(cert_auth.password));
1124 FREE_AND_NULL(cert_auth.password);
1125 }
1126 ssl_cert_password_required = 0;
1127
1128 FREE_AND_NULL(cached_accept_language);
1129 }
1130
1131 struct active_request_slot *get_active_slot(void)
1132 {
1133 struct active_request_slot *slot = active_queue_head;
1134 struct active_request_slot *newslot;
1135
1136 #ifdef USE_CURL_MULTI
1137 int num_transfers;
1138
1139 /* Wait for a slot to open up if the queue is full */
1140 while (active_requests >= max_requests) {
1141 curl_multi_perform(curlm, &num_transfers);
1142 if (num_transfers < active_requests)
1143 process_curl_messages();
1144 }
1145 #endif
1146
1147 while (slot != NULL && slot->in_use)
1148 slot = slot->next;
1149
1150 if (slot == NULL) {
1151 newslot = xmalloc(sizeof(*newslot));
1152 newslot->curl = NULL;
1153 newslot->in_use = 0;
1154 newslot->next = NULL;
1155
1156 slot = active_queue_head;
1157 if (slot == NULL) {
1158 active_queue_head = newslot;
1159 } else {
1160 while (slot->next != NULL)
1161 slot = slot->next;
1162 slot->next = newslot;
1163 }
1164 slot = newslot;
1165 }
1166
1167 if (slot->curl == NULL) {
1168 #ifdef NO_CURL_EASY_DUPHANDLE
1169 slot->curl = get_curl_handle();
1170 #else
1171 slot->curl = curl_easy_duphandle(curl_default);
1172 #endif
1173 curl_session_count++;
1174 }
1175
1176 active_requests++;
1177 slot->in_use = 1;
1178 slot->results = NULL;
1179 slot->finished = NULL;
1180 slot->callback_data = NULL;
1181 slot->callback_func = NULL;
1182 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1183 if (curl_save_cookies)
1184 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1185 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1186 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1187 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1188 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1189 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1190 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1191 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1192 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1193 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1194 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1195
1196 /*
1197 * Default following to off unless "ALWAYS" is configured; this gives
1198 * callers a sane starting point, and they can tweak for individual
1199 * HTTP_FOLLOW_* cases themselves.
1200 */
1201 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1202 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1203 else
1204 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1205
1206 #if LIBCURL_VERSION_NUM >= 0x070a08
1207 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1208 #endif
1209 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1210 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1211 #endif
1212 if (http_auth.password || curl_empty_auth_enabled())
1213 init_curl_http_auth(slot->curl);
1214
1215 return slot;
1216 }
1217
1218 int start_active_slot(struct active_request_slot *slot)
1219 {
1220 #ifdef USE_CURL_MULTI
1221 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1222 int num_transfers;
1223
1224 if (curlm_result != CURLM_OK &&
1225 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1226 warning("curl_multi_add_handle failed: %s",
1227 curl_multi_strerror(curlm_result));
1228 active_requests--;
1229 slot->in_use = 0;
1230 return 0;
1231 }
1232
1233 /*
1234 * We know there must be something to do, since we just added
1235 * something.
1236 */
1237 curl_multi_perform(curlm, &num_transfers);
1238 #endif
1239 return 1;
1240 }
1241
1242 #ifdef USE_CURL_MULTI
1243 struct fill_chain {
1244 void *data;
1245 int (*fill)(void *);
1246 struct fill_chain *next;
1247 };
1248
1249 static struct fill_chain *fill_cfg;
1250
1251 void add_fill_function(void *data, int (*fill)(void *))
1252 {
1253 struct fill_chain *new_fill = xmalloc(sizeof(*new_fill));
1254 struct fill_chain **linkp = &fill_cfg;
1255 new_fill->data = data;
1256 new_fill->fill = fill;
1257 new_fill->next = NULL;
1258 while (*linkp)
1259 linkp = &(*linkp)->next;
1260 *linkp = new_fill;
1261 }
1262
1263 void fill_active_slots(void)
1264 {
1265 struct active_request_slot *slot = active_queue_head;
1266
1267 while (active_requests < max_requests) {
1268 struct fill_chain *fill;
1269 for (fill = fill_cfg; fill; fill = fill->next)
1270 if (fill->fill(fill->data))
1271 break;
1272
1273 if (!fill)
1274 break;
1275 }
1276
1277 while (slot != NULL) {
1278 if (!slot->in_use && slot->curl != NULL
1279 && curl_session_count > min_curl_sessions) {
1280 curl_easy_cleanup(slot->curl);
1281 slot->curl = NULL;
1282 curl_session_count--;
1283 }
1284 slot = slot->next;
1285 }
1286 }
1287
1288 void step_active_slots(void)
1289 {
1290 int num_transfers;
1291 CURLMcode curlm_result;
1292
1293 do {
1294 curlm_result = curl_multi_perform(curlm, &num_transfers);
1295 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1296 if (num_transfers < active_requests) {
1297 process_curl_messages();
1298 fill_active_slots();
1299 }
1300 }
1301 #endif
1302
1303 void run_active_slot(struct active_request_slot *slot)
1304 {
1305 #ifdef USE_CURL_MULTI
1306 fd_set readfds;
1307 fd_set writefds;
1308 fd_set excfds;
1309 int max_fd;
1310 struct timeval select_timeout;
1311 int finished = 0;
1312
1313 slot->finished = &finished;
1314 while (!finished) {
1315 step_active_slots();
1316
1317 if (slot->in_use) {
1318 #if LIBCURL_VERSION_NUM >= 0x070f04
1319 long curl_timeout;
1320 curl_multi_timeout(curlm, &curl_timeout);
1321 if (curl_timeout == 0) {
1322 continue;
1323 } else if (curl_timeout == -1) {
1324 select_timeout.tv_sec = 0;
1325 select_timeout.tv_usec = 50000;
1326 } else {
1327 select_timeout.tv_sec = curl_timeout / 1000;
1328 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1329 }
1330 #else
1331 select_timeout.tv_sec = 0;
1332 select_timeout.tv_usec = 50000;
1333 #endif
1334
1335 max_fd = -1;
1336 FD_ZERO(&readfds);
1337 FD_ZERO(&writefds);
1338 FD_ZERO(&excfds);
1339 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1340
1341 /*
1342 * It can happen that curl_multi_timeout returns a pathologically
1343 * long timeout when curl_multi_fdset returns no file descriptors
1344 * to read. See commit message for more details.
1345 */
1346 if (max_fd < 0 &&
1347 (select_timeout.tv_sec > 0 ||
1348 select_timeout.tv_usec > 50000)) {
1349 select_timeout.tv_sec = 0;
1350 select_timeout.tv_usec = 50000;
1351 }
1352
1353 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1354 }
1355 }
1356 #else
1357 while (slot->in_use) {
1358 slot->curl_result = curl_easy_perform(slot->curl);
1359 finish_active_slot(slot);
1360 }
1361 #endif
1362 }
1363
1364 static void release_active_slot(struct active_request_slot *slot)
1365 {
1366 closedown_active_slot(slot);
1367 if (slot->curl) {
1368 xmulti_remove_handle(slot);
1369 if (curl_session_count > min_curl_sessions) {
1370 curl_easy_cleanup(slot->curl);
1371 slot->curl = NULL;
1372 curl_session_count--;
1373 }
1374 }
1375 #ifdef USE_CURL_MULTI
1376 fill_active_slots();
1377 #endif
1378 }
1379
1380 void finish_all_active_slots(void)
1381 {
1382 struct active_request_slot *slot = active_queue_head;
1383
1384 while (slot != NULL)
1385 if (slot->in_use) {
1386 run_active_slot(slot);
1387 slot = active_queue_head;
1388 } else {
1389 slot = slot->next;
1390 }
1391 }
1392
1393 /* Helpers for modifying and creating URLs */
1394 static inline int needs_quote(int ch)
1395 {
1396 if (((ch >= 'A') && (ch <= 'Z'))
1397 || ((ch >= 'a') && (ch <= 'z'))
1398 || ((ch >= '0') && (ch <= '9'))
1399 || (ch == '/')
1400 || (ch == '-')
1401 || (ch == '.'))
1402 return 0;
1403 return 1;
1404 }
1405
1406 static char *quote_ref_url(const char *base, const char *ref)
1407 {
1408 struct strbuf buf = STRBUF_INIT;
1409 const char *cp;
1410 int ch;
1411
1412 end_url_with_slash(&buf, base);
1413
1414 for (cp = ref; (ch = *cp) != 0; cp++)
1415 if (needs_quote(ch))
1416 strbuf_addf(&buf, "%%%02x", ch);
1417 else
1418 strbuf_addch(&buf, *cp);
1419
1420 return strbuf_detach(&buf, NULL);
1421 }
1422
1423 void append_remote_object_url(struct strbuf *buf, const char *url,
1424 const char *hex,
1425 int only_two_digit_prefix)
1426 {
1427 end_url_with_slash(buf, url);
1428
1429 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1430 if (!only_two_digit_prefix)
1431 strbuf_addstr(buf, hex + 2);
1432 }
1433
1434 char *get_remote_object_url(const char *url, const char *hex,
1435 int only_two_digit_prefix)
1436 {
1437 struct strbuf buf = STRBUF_INIT;
1438 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1439 return strbuf_detach(&buf, NULL);
1440 }
1441
1442 static int handle_curl_result(struct slot_results *results)
1443 {
1444 /*
1445 * If we see a failing http code with CURLE_OK, we have turned off
1446 * FAILONERROR (to keep the server's custom error response), and should
1447 * translate the code into failure here.
1448 *
1449 * Likewise, if we see a redirect (30x code), that means we turned off
1450 * redirect-following, and we should treat the result as an error.
1451 */
1452 if (results->curl_result == CURLE_OK &&
1453 results->http_code >= 300) {
1454 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1455 /*
1456 * Normally curl will already have put the "reason phrase"
1457 * from the server into curl_errorstr; unfortunately without
1458 * FAILONERROR it is lost, so we can give only the numeric
1459 * status code.
1460 */
1461 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1462 "The requested URL returned error: %ld",
1463 results->http_code);
1464 }
1465
1466 if (results->curl_result == CURLE_OK) {
1467 credential_approve(&http_auth);
1468 if (proxy_auth.password)
1469 credential_approve(&proxy_auth);
1470 return HTTP_OK;
1471 } else if (missing_target(results))
1472 return HTTP_MISSING_TARGET;
1473 else if (results->http_code == 401) {
1474 if (http_auth.username && http_auth.password) {
1475 credential_reject(&http_auth);
1476 return HTTP_NOAUTH;
1477 } else {
1478 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1479 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1480 if (results->auth_avail) {
1481 http_auth_methods &= results->auth_avail;
1482 http_auth_methods_restricted = 1;
1483 }
1484 #endif
1485 return HTTP_REAUTH;
1486 }
1487 } else {
1488 if (results->http_connectcode == 407)
1489 credential_reject(&proxy_auth);
1490 #if LIBCURL_VERSION_NUM >= 0x070c00
1491 if (!curl_errorstr[0])
1492 strlcpy(curl_errorstr,
1493 curl_easy_strerror(results->curl_result),
1494 sizeof(curl_errorstr));
1495 #endif
1496 return HTTP_ERROR;
1497 }
1498 }
1499
1500 int run_one_slot(struct active_request_slot *slot,
1501 struct slot_results *results)
1502 {
1503 slot->results = results;
1504 if (!start_active_slot(slot)) {
1505 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1506 "failed to start HTTP request");
1507 return HTTP_START_FAILED;
1508 }
1509
1510 run_active_slot(slot);
1511 return handle_curl_result(results);
1512 }
1513
1514 struct curl_slist *http_copy_default_headers(void)
1515 {
1516 struct curl_slist *headers = NULL, *h;
1517
1518 for (h = extra_http_headers; h; h = h->next)
1519 headers = curl_slist_append(headers, h->data);
1520
1521 return headers;
1522 }
1523
1524 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1525 {
1526 char *ptr;
1527 CURLcode ret;
1528
1529 strbuf_reset(buf);
1530 ret = curl_easy_getinfo(curl, info, &ptr);
1531 if (!ret && ptr)
1532 strbuf_addstr(buf, ptr);
1533 return ret;
1534 }
1535
1536 /*
1537 * Check for and extract a content-type parameter. "raw"
1538 * should be positioned at the start of the potential
1539 * parameter, with any whitespace already removed.
1540 *
1541 * "name" is the name of the parameter. The value is appended
1542 * to "out".
1543 */
1544 static int extract_param(const char *raw, const char *name,
1545 struct strbuf *out)
1546 {
1547 size_t len = strlen(name);
1548
1549 if (strncasecmp(raw, name, len))
1550 return -1;
1551 raw += len;
1552
1553 if (*raw != '=')
1554 return -1;
1555 raw++;
1556
1557 while (*raw && !isspace(*raw) && *raw != ';')
1558 strbuf_addch(out, *raw++);
1559 return 0;
1560 }
1561
1562 /*
1563 * Extract a normalized version of the content type, with any
1564 * spaces suppressed, all letters lowercased, and no trailing ";"
1565 * or parameters.
1566 *
1567 * Note that we will silently remove even invalid whitespace. For
1568 * example, "text / plain" is specifically forbidden by RFC 2616,
1569 * but "text/plain" is the only reasonable output, and this keeps
1570 * our code simple.
1571 *
1572 * If the "charset" argument is not NULL, store the value of any
1573 * charset parameter there.
1574 *
1575 * Example:
1576 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1577 * "text / plain" -> "text/plain"
1578 */
1579 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1580 struct strbuf *charset)
1581 {
1582 const char *p;
1583
1584 strbuf_reset(type);
1585 strbuf_grow(type, raw->len);
1586 for (p = raw->buf; *p; p++) {
1587 if (isspace(*p))
1588 continue;
1589 if (*p == ';') {
1590 p++;
1591 break;
1592 }
1593 strbuf_addch(type, tolower(*p));
1594 }
1595
1596 if (!charset)
1597 return;
1598
1599 strbuf_reset(charset);
1600 while (*p) {
1601 while (isspace(*p) || *p == ';')
1602 p++;
1603 if (!extract_param(p, "charset", charset))
1604 return;
1605 while (*p && !isspace(*p))
1606 p++;
1607 }
1608
1609 if (!charset->len && starts_with(type->buf, "text/"))
1610 strbuf_addstr(charset, "ISO-8859-1");
1611 }
1612
1613 static void write_accept_language(struct strbuf *buf)
1614 {
1615 /*
1616 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1617 * that, q-value will be smaller than 0.001, the minimum q-value the
1618 * HTTP specification allows. See
1619 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1620 */
1621 const int MAX_DECIMAL_PLACES = 3;
1622 const int MAX_LANGUAGE_TAGS = 1000;
1623 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1624 char **language_tags = NULL;
1625 int num_langs = 0;
1626 const char *s = get_preferred_languages();
1627 int i;
1628 struct strbuf tag = STRBUF_INIT;
1629
1630 /* Don't add Accept-Language header if no language is preferred. */
1631 if (!s)
1632 return;
1633
1634 /*
1635 * Split the colon-separated string of preferred languages into
1636 * language_tags array.
1637 */
1638 do {
1639 /* collect language tag */
1640 for (; *s && (isalnum(*s) || *s == '_'); s++)
1641 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1642
1643 /* skip .codeset, @modifier and any other unnecessary parts */
1644 while (*s && *s != ':')
1645 s++;
1646
1647 if (tag.len) {
1648 num_langs++;
1649 REALLOC_ARRAY(language_tags, num_langs);
1650 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1651 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1652 break;
1653 }
1654 } while (*s++);
1655
1656 /* write Accept-Language header into buf */
1657 if (num_langs) {
1658 int last_buf_len = 0;
1659 int max_q;
1660 int decimal_places;
1661 char q_format[32];
1662
1663 /* add '*' */
1664 REALLOC_ARRAY(language_tags, num_langs + 1);
1665 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1666
1667 /* compute decimal_places */
1668 for (max_q = 1, decimal_places = 0;
1669 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1670 decimal_places++, max_q *= 10)
1671 ;
1672
1673 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1674
1675 strbuf_addstr(buf, "Accept-Language: ");
1676
1677 for (i = 0; i < num_langs; i++) {
1678 if (i > 0)
1679 strbuf_addstr(buf, ", ");
1680
1681 strbuf_addstr(buf, language_tags[i]);
1682
1683 if (i > 0)
1684 strbuf_addf(buf, q_format, max_q - i);
1685
1686 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1687 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1688 break;
1689 }
1690
1691 last_buf_len = buf->len;
1692 }
1693 }
1694
1695 /* free language tags -- last one is a static '*' */
1696 for (i = 0; i < num_langs - 1; i++)
1697 free(language_tags[i]);
1698 free(language_tags);
1699 }
1700
1701 /*
1702 * Get an Accept-Language header which indicates user's preferred languages.
1703 *
1704 * Examples:
1705 * LANGUAGE= -> ""
1706 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1707 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1708 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1709 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1710 * LANGUAGE= LANG=C -> ""
1711 */
1712 static const char *get_accept_language(void)
1713 {
1714 if (!cached_accept_language) {
1715 struct strbuf buf = STRBUF_INIT;
1716 write_accept_language(&buf);
1717 if (buf.len > 0)
1718 cached_accept_language = strbuf_detach(&buf, NULL);
1719 }
1720
1721 return cached_accept_language;
1722 }
1723
1724 static void http_opt_request_remainder(CURL *curl, off_t pos)
1725 {
1726 char buf[128];
1727 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1728 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1729 }
1730
1731 /* http_request() targets */
1732 #define HTTP_REQUEST_STRBUF 0
1733 #define HTTP_REQUEST_FILE 1
1734
1735 static int http_request(const char *url,
1736 void *result, int target,
1737 const struct http_get_options *options)
1738 {
1739 struct active_request_slot *slot;
1740 struct slot_results results;
1741 struct curl_slist *headers = http_copy_default_headers();
1742 struct strbuf buf = STRBUF_INIT;
1743 const char *accept_language;
1744 int ret;
1745
1746 slot = get_active_slot();
1747 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1748
1749 if (result == NULL) {
1750 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1751 } else {
1752 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1753 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1754
1755 if (target == HTTP_REQUEST_FILE) {
1756 off_t posn = ftello(result);
1757 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1758 fwrite);
1759 if (posn > 0)
1760 http_opt_request_remainder(slot->curl, posn);
1761 } else
1762 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1763 fwrite_buffer);
1764 }
1765
1766 accept_language = get_accept_language();
1767
1768 if (accept_language)
1769 headers = curl_slist_append(headers, accept_language);
1770
1771 strbuf_addstr(&buf, "Pragma:");
1772 if (options && options->no_cache)
1773 strbuf_addstr(&buf, " no-cache");
1774 if (options && options->keep_error)
1775 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1776 if (options && options->initial_request &&
1777 http_follow_config == HTTP_FOLLOW_INITIAL)
1778 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1779
1780 headers = curl_slist_append(headers, buf.buf);
1781
1782 /* Add additional headers here */
1783 if (options && options->extra_headers) {
1784 const struct string_list_item *item;
1785 for_each_string_list_item(item, options->extra_headers) {
1786 headers = curl_slist_append(headers, item->string);
1787 }
1788 }
1789
1790 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1791 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1792 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1793
1794 ret = run_one_slot(slot, &results);
1795
1796 if (options && options->content_type) {
1797 struct strbuf raw = STRBUF_INIT;
1798 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1799 extract_content_type(&raw, options->content_type,
1800 options->charset);
1801 strbuf_release(&raw);
1802 }
1803
1804 if (options && options->effective_url)
1805 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1806 options->effective_url);
1807
1808 curl_slist_free_all(headers);
1809 strbuf_release(&buf);
1810
1811 return ret;
1812 }
1813
1814 /*
1815 * Update the "base" url to a more appropriate value, as deduced by
1816 * redirects seen when requesting a URL starting with "url".
1817 *
1818 * The "asked" parameter is a URL that we asked curl to access, and must begin
1819 * with "base".
1820 *
1821 * The "got" parameter is the URL that curl reported to us as where we ended
1822 * up.
1823 *
1824 * Returns 1 if we updated the base url, 0 otherwise.
1825 *
1826 * Our basic strategy is to compare "base" and "asked" to find the bits
1827 * specific to our request. We then strip those bits off of "got" to yield the
1828 * new base. So for example, if our base is "http://example.com/foo.git",
1829 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1830 * with "https://other.example.com/foo.git/info/refs". We would want the
1831 * new URL to become "https://other.example.com/foo.git".
1832 *
1833 * Note that this assumes a sane redirect scheme. It's entirely possible
1834 * in the example above to end up at a URL that does not even end in
1835 * "info/refs". In such a case we die. There's not much we can do, such a
1836 * scheme is unlikely to represent a real git repository, and failing to
1837 * rewrite the base opens options for malicious redirects to do funny things.
1838 */
1839 static int update_url_from_redirect(struct strbuf *base,
1840 const char *asked,
1841 const struct strbuf *got)
1842 {
1843 const char *tail;
1844 size_t new_len;
1845
1846 if (!strcmp(asked, got->buf))
1847 return 0;
1848
1849 if (!skip_prefix(asked, base->buf, &tail))
1850 BUG("update_url_from_redirect: %s is not a superset of %s",
1851 asked, base->buf);
1852
1853 new_len = got->len;
1854 if (!strip_suffix_mem(got->buf, &new_len, tail))
1855 die(_("unable to update url base from redirection:\n"
1856 " asked for: %s\n"
1857 " redirect: %s"),
1858 asked, got->buf);
1859
1860 strbuf_reset(base);
1861 strbuf_add(base, got->buf, new_len);
1862
1863 return 1;
1864 }
1865
1866 static int http_request_reauth(const char *url,
1867 void *result, int target,
1868 struct http_get_options *options)
1869 {
1870 int ret = http_request(url, result, target, options);
1871
1872 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1873 return ret;
1874
1875 if (options && options->effective_url && options->base_url) {
1876 if (update_url_from_redirect(options->base_url,
1877 url, options->effective_url)) {
1878 credential_from_url(&http_auth, options->base_url->buf);
1879 url = options->effective_url->buf;
1880 }
1881 }
1882
1883 if (ret != HTTP_REAUTH)
1884 return ret;
1885
1886 /*
1887 * If we are using KEEP_ERROR, the previous request may have
1888 * put cruft into our output stream; we should clear it out before
1889 * making our next request. We only know how to do this for
1890 * the strbuf case, but that is enough to satisfy current callers.
1891 */
1892 if (options && options->keep_error) {
1893 switch (target) {
1894 case HTTP_REQUEST_STRBUF:
1895 strbuf_reset(result);
1896 break;
1897 default:
1898 BUG("HTTP_KEEP_ERROR is only supported with strbufs");
1899 }
1900 }
1901
1902 credential_fill(&http_auth);
1903
1904 return http_request(url, result, target, options);
1905 }
1906
1907 int http_get_strbuf(const char *url,
1908 struct strbuf *result,
1909 struct http_get_options *options)
1910 {
1911 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1912 }
1913
1914 /*
1915 * Downloads a URL and stores the result in the given file.
1916 *
1917 * If a previous interrupted download is detected (i.e. a previous temporary
1918 * file is still around) the download is resumed.
1919 */
1920 static int http_get_file(const char *url, const char *filename,
1921 struct http_get_options *options)
1922 {
1923 int ret;
1924 struct strbuf tmpfile = STRBUF_INIT;
1925 FILE *result;
1926
1927 strbuf_addf(&tmpfile, "%s.temp", filename);
1928 result = fopen(tmpfile.buf, "a");
1929 if (!result) {
1930 error("Unable to open local file %s", tmpfile.buf);
1931 ret = HTTP_ERROR;
1932 goto cleanup;
1933 }
1934
1935 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1936 fclose(result);
1937
1938 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1939 ret = HTTP_ERROR;
1940 cleanup:
1941 strbuf_release(&tmpfile);
1942 return ret;
1943 }
1944
1945 int http_fetch_ref(const char *base, struct ref *ref)
1946 {
1947 struct http_get_options options = {0};
1948 char *url;
1949 struct strbuf buffer = STRBUF_INIT;
1950 int ret = -1;
1951
1952 options.no_cache = 1;
1953
1954 url = quote_ref_url(base, ref->name);
1955 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1956 strbuf_rtrim(&buffer);
1957 if (buffer.len == 40)
1958 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1959 else if (starts_with(buffer.buf, "ref: ")) {
1960 ref->symref = xstrdup(buffer.buf + 5);
1961 ret = 0;
1962 }
1963 }
1964
1965 strbuf_release(&buffer);
1966 free(url);
1967 return ret;
1968 }
1969
1970 /* Helpers for fetching packs */
1971 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1972 {
1973 char *url, *tmp;
1974 struct strbuf buf = STRBUF_INIT;
1975
1976 if (http_is_verbose)
1977 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1978
1979 end_url_with_slash(&buf, base_url);
1980 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1981 url = strbuf_detach(&buf, NULL);
1982
1983 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1984 tmp = strbuf_detach(&buf, NULL);
1985
1986 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1987 error("Unable to get pack index %s", url);
1988 FREE_AND_NULL(tmp);
1989 }
1990
1991 free(url);
1992 return tmp;
1993 }
1994
1995 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1996 unsigned char *sha1, const char *base_url)
1997 {
1998 struct packed_git *new_pack;
1999 char *tmp_idx = NULL;
2000 int ret;
2001
2002 if (has_pack_index(sha1)) {
2003 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
2004 if (!new_pack)
2005 return -1; /* parse_pack_index() already issued error message */
2006 goto add_pack;
2007 }
2008
2009 tmp_idx = fetch_pack_index(sha1, base_url);
2010 if (!tmp_idx)
2011 return -1;
2012
2013 new_pack = parse_pack_index(sha1, tmp_idx);
2014 if (!new_pack) {
2015 unlink(tmp_idx);
2016 free(tmp_idx);
2017
2018 return -1; /* parse_pack_index() already issued error message */
2019 }
2020
2021 ret = verify_pack_index(new_pack);
2022 if (!ret) {
2023 close_pack_index(new_pack);
2024 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
2025 }
2026 free(tmp_idx);
2027 if (ret)
2028 return -1;
2029
2030 add_pack:
2031 new_pack->next = *packs_head;
2032 *packs_head = new_pack;
2033 return 0;
2034 }
2035
2036 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
2037 {
2038 struct http_get_options options = {0};
2039 int ret = 0, i = 0;
2040 char *url, *data;
2041 struct strbuf buf = STRBUF_INIT;
2042 unsigned char hash[GIT_MAX_RAWSZ];
2043 const unsigned hexsz = the_hash_algo->hexsz;
2044
2045 end_url_with_slash(&buf, base_url);
2046 strbuf_addstr(&buf, "objects/info/packs");
2047 url = strbuf_detach(&buf, NULL);
2048
2049 options.no_cache = 1;
2050 ret = http_get_strbuf(url, &buf, &options);
2051 if (ret != HTTP_OK)
2052 goto cleanup;
2053
2054 data = buf.buf;
2055 while (i < buf.len) {
2056 switch (data[i]) {
2057 case 'P':
2058 i++;
2059 if (i + hexsz + 12 <= buf.len &&
2060 starts_with(data + i, " pack-") &&
2061 starts_with(data + i + hexsz + 6, ".pack\n")) {
2062 get_sha1_hex(data + i + 6, hash);
2063 fetch_and_setup_pack_index(packs_head, hash,
2064 base_url);
2065 i += hexsz + 11;
2066 break;
2067 }
2068 default:
2069 while (i < buf.len && data[i] != '\n')
2070 i++;
2071 }
2072 i++;
2073 }
2074
2075 cleanup:
2076 free(url);
2077 return ret;
2078 }
2079
2080 void release_http_pack_request(struct http_pack_request *preq)
2081 {
2082 if (preq->packfile != NULL) {
2083 fclose(preq->packfile);
2084 preq->packfile = NULL;
2085 }
2086 preq->slot = NULL;
2087 strbuf_release(&preq->tmpfile);
2088 free(preq->url);
2089 free(preq);
2090 }
2091
2092 int finish_http_pack_request(struct http_pack_request *preq)
2093 {
2094 struct packed_git **lst;
2095 struct packed_git *p = preq->target;
2096 char *tmp_idx;
2097 size_t len;
2098 struct child_process ip = CHILD_PROCESS_INIT;
2099
2100 close_pack_index(p);
2101
2102 fclose(preq->packfile);
2103 preq->packfile = NULL;
2104
2105 lst = preq->lst;
2106 while (*lst != p)
2107 lst = &((*lst)->next);
2108 *lst = (*lst)->next;
2109
2110 if (!strip_suffix(preq->tmpfile.buf, ".pack.temp", &len))
2111 BUG("pack tmpfile does not end in .pack.temp?");
2112 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile.buf);
2113
2114 argv_array_push(&ip.args, "index-pack");
2115 argv_array_pushl(&ip.args, "-o", tmp_idx, NULL);
2116 argv_array_push(&ip.args, preq->tmpfile.buf);
2117 ip.git_cmd = 1;
2118 ip.no_stdin = 1;
2119 ip.no_stdout = 1;
2120
2121 if (run_command(&ip)) {
2122 unlink(preq->tmpfile.buf);
2123 unlink(tmp_idx);
2124 free(tmp_idx);
2125 return -1;
2126 }
2127
2128 unlink(sha1_pack_index_name(p->sha1));
2129
2130 if (finalize_object_file(preq->tmpfile.buf, sha1_pack_name(p->sha1))
2131 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2132 free(tmp_idx);
2133 return -1;
2134 }
2135
2136 install_packed_git(the_repository, p);
2137 free(tmp_idx);
2138 return 0;
2139 }
2140
2141 struct http_pack_request *new_http_pack_request(
2142 struct packed_git *target, const char *base_url)
2143 {
2144 off_t prev_posn = 0;
2145 struct strbuf buf = STRBUF_INIT;
2146 struct http_pack_request *preq;
2147
2148 preq = xcalloc(1, sizeof(*preq));
2149 strbuf_init(&preq->tmpfile, 0);
2150 preq->target = target;
2151
2152 end_url_with_slash(&buf, base_url);
2153 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2154 sha1_to_hex(target->sha1));
2155 preq->url = strbuf_detach(&buf, NULL);
2156
2157 strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(target->sha1));
2158 preq->packfile = fopen(preq->tmpfile.buf, "a");
2159 if (!preq->packfile) {
2160 error("Unable to open local file %s for pack",
2161 preq->tmpfile.buf);
2162 goto abort;
2163 }
2164
2165 preq->slot = get_active_slot();
2166 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2167 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2168 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2169 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2170 no_pragma_header);
2171
2172 /*
2173 * If there is data present from a previous transfer attempt,
2174 * resume where it left off
2175 */
2176 prev_posn = ftello(preq->packfile);
2177 if (prev_posn>0) {
2178 if (http_is_verbose)
2179 fprintf(stderr,
2180 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2181 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2182 http_opt_request_remainder(preq->slot->curl, prev_posn);
2183 }
2184
2185 return preq;
2186
2187 abort:
2188 strbuf_release(&preq->tmpfile);
2189 free(preq->url);
2190 free(preq);
2191 return NULL;
2192 }
2193
2194 /* Helpers for fetching objects (loose) */
2195 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2196 void *data)
2197 {
2198 unsigned char expn[4096];
2199 size_t size = eltsize * nmemb;
2200 int posn = 0;
2201 struct http_object_request *freq = data;
2202 struct active_request_slot *slot = freq->slot;
2203
2204 if (slot) {
2205 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2206 &slot->http_code);
2207 if (c != CURLE_OK)
2208 BUG("curl_easy_getinfo for HTTP code failed: %s",
2209 curl_easy_strerror(c));
2210 if (slot->http_code >= 300)
2211 return size;
2212 }
2213
2214 do {
2215 ssize_t retval = xwrite(freq->localfile,
2216 (char *) ptr + posn, size - posn);
2217 if (retval < 0)
2218 return posn;
2219 posn += retval;
2220 } while (posn < size);
2221
2222 freq->stream.avail_in = size;
2223 freq->stream.next_in = (void *)ptr;
2224 do {
2225 freq->stream.next_out = expn;
2226 freq->stream.avail_out = sizeof(expn);
2227 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2228 git_SHA1_Update(&freq->c, expn,
2229 sizeof(expn) - freq->stream.avail_out);
2230 } while (freq->stream.avail_in && freq->zret == Z_OK);
2231 return size;
2232 }
2233
2234 struct http_object_request *new_http_object_request(const char *base_url,
2235 unsigned char *sha1)
2236 {
2237 char *hex = sha1_to_hex(sha1);
2238 struct strbuf filename = STRBUF_INIT;
2239 struct strbuf prevfile = STRBUF_INIT;
2240 int prevlocal;
2241 char prev_buf[PREV_BUF_SIZE];
2242 ssize_t prev_read = 0;
2243 off_t prev_posn = 0;
2244 struct http_object_request *freq;
2245
2246 freq = xcalloc(1, sizeof(*freq));
2247 strbuf_init(&freq->tmpfile, 0);
2248 hashcpy(freq->sha1, sha1);
2249 freq->localfile = -1;
2250
2251 sha1_file_name(the_repository, &filename, sha1);
2252 strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf);
2253
2254 strbuf_addf(&prevfile, "%s.prev", filename.buf);
2255 unlink_or_warn(prevfile.buf);
2256 rename(freq->tmpfile.buf, prevfile.buf);
2257 unlink_or_warn(freq->tmpfile.buf);
2258 strbuf_release(&filename);
2259
2260 if (freq->localfile != -1)
2261 error("fd leakage in start: %d", freq->localfile);
2262 freq->localfile = open(freq->tmpfile.buf,
2263 O_WRONLY | O_CREAT | O_EXCL, 0666);
2264 /*
2265 * This could have failed due to the "lazy directory creation";
2266 * try to mkdir the last path component.
2267 */
2268 if (freq->localfile < 0 && errno == ENOENT) {
2269 char *dir = strrchr(freq->tmpfile.buf, '/');
2270 if (dir) {
2271 *dir = 0;
2272 mkdir(freq->tmpfile.buf, 0777);
2273 *dir = '/';
2274 }
2275 freq->localfile = open(freq->tmpfile.buf,
2276 O_WRONLY | O_CREAT | O_EXCL, 0666);
2277 }
2278
2279 if (freq->localfile < 0) {
2280 error_errno("Couldn't create temporary file %s",
2281 freq->tmpfile.buf);
2282 goto abort;
2283 }
2284
2285 git_inflate_init(&freq->stream);
2286
2287 git_SHA1_Init(&freq->c);
2288
2289 freq->url = get_remote_object_url(base_url, hex, 0);
2290
2291 /*
2292 * If a previous temp file is present, process what was already
2293 * fetched.
2294 */
2295 prevlocal = open(prevfile.buf, O_RDONLY);
2296 if (prevlocal != -1) {
2297 do {
2298 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2299 if (prev_read>0) {
2300 if (fwrite_sha1_file(prev_buf,
2301 1,
2302 prev_read,
2303 freq) == prev_read) {
2304 prev_posn += prev_read;
2305 } else {
2306 prev_read = -1;
2307 }
2308 }
2309 } while (prev_read > 0);
2310 close(prevlocal);
2311 }
2312 unlink_or_warn(prevfile.buf);
2313 strbuf_release(&prevfile);
2314
2315 /*
2316 * Reset inflate/SHA1 if there was an error reading the previous temp
2317 * file; also rewind to the beginning of the local file.
2318 */
2319 if (prev_read == -1) {
2320 memset(&freq->stream, 0, sizeof(freq->stream));
2321 git_inflate_init(&freq->stream);
2322 git_SHA1_Init(&freq->c);
2323 if (prev_posn>0) {
2324 prev_posn = 0;
2325 lseek(freq->localfile, 0, SEEK_SET);
2326 if (ftruncate(freq->localfile, 0) < 0) {
2327 error_errno("Couldn't truncate temporary file %s",
2328 freq->tmpfile.buf);
2329 goto abort;
2330 }
2331 }
2332 }
2333
2334 freq->slot = get_active_slot();
2335
2336 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2337 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2338 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2339 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2340 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2341 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2342
2343 /*
2344 * If we have successfully processed data from a previous fetch
2345 * attempt, only fetch the data we don't already have.
2346 */
2347 if (prev_posn>0) {
2348 if (http_is_verbose)
2349 fprintf(stderr,
2350 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2351 hex, (uintmax_t)prev_posn);
2352 http_opt_request_remainder(freq->slot->curl, prev_posn);
2353 }
2354
2355 return freq;
2356
2357 abort:
2358 strbuf_release(&prevfile);
2359 free(freq->url);
2360 free(freq);
2361 return NULL;
2362 }
2363
2364 void process_http_object_request(struct http_object_request *freq)
2365 {
2366 if (freq->slot == NULL)
2367 return;
2368 freq->curl_result = freq->slot->curl_result;
2369 freq->http_code = freq->slot->http_code;
2370 freq->slot = NULL;
2371 }
2372
2373 int finish_http_object_request(struct http_object_request *freq)
2374 {
2375 struct stat st;
2376 struct strbuf filename = STRBUF_INIT;
2377
2378 close(freq->localfile);
2379 freq->localfile = -1;
2380
2381 process_http_object_request(freq);
2382
2383 if (freq->http_code == 416) {
2384 warning("requested range invalid; we may already have all the data.");
2385 } else if (freq->curl_result != CURLE_OK) {
2386 if (stat(freq->tmpfile.buf, &st) == 0)
2387 if (st.st_size == 0)
2388 unlink_or_warn(freq->tmpfile.buf);
2389 return -1;
2390 }
2391
2392 git_inflate_end(&freq->stream);
2393 git_SHA1_Final(freq->real_sha1, &freq->c);
2394 if (freq->zret != Z_STREAM_END) {
2395 unlink_or_warn(freq->tmpfile.buf);
2396 return -1;
2397 }
2398 if (hashcmp(freq->sha1, freq->real_sha1)) {
2399 unlink_or_warn(freq->tmpfile.buf);
2400 return -1;
2401 }
2402 sha1_file_name(the_repository, &filename, freq->sha1);
2403 freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf);
2404 strbuf_release(&filename);
2405
2406 return freq->rename;
2407 }
2408
2409 void abort_http_object_request(struct http_object_request *freq)
2410 {
2411 unlink_or_warn(freq->tmpfile.buf);
2412
2413 release_http_object_request(freq);
2414 }
2415
2416 void release_http_object_request(struct http_object_request *freq)
2417 {
2418 if (freq->localfile != -1) {
2419 close(freq->localfile);
2420 freq->localfile = -1;
2421 }
2422 if (freq->url != NULL) {
2423 FREE_AND_NULL(freq->url);
2424 }
2425 if (freq->slot != NULL) {
2426 freq->slot->callback_func = NULL;
2427 freq->slot->callback_data = NULL;
2428 release_active_slot(freq->slot);
2429 freq->slot = NULL;
2430 }
2431 strbuf_release(&freq->tmpfile);
2432 }
git for Debian