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ssh test: make copy_ssh_wrapper_as clean up after itself
[alt-git.git] / http.c
blobffb719216179dba7490c5cdffe8e0f72d3955aeb
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
17 static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
18 #if LIBCURL_VERSION_NUM >= 0x070a08
19 long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
20 #else
21 long int git_curl_ipresolve;
22 #endif
23 int active_requests;
24 int http_is_verbose;
25 ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
26
27 #if LIBCURL_VERSION_NUM >= 0x070a06
28 #define LIBCURL_CAN_HANDLE_AUTH_ANY
29 #endif
30
31 static int min_curl_sessions = 1;
32 static int curl_session_count;
33 #ifdef USE_CURL_MULTI
34 static int max_requests = -1;
35 static CURLM *curlm;
36 #endif
37 #ifndef NO_CURL_EASY_DUPHANDLE
38 static CURL *curl_default;
39 #endif
40
41 #define PREV_BUF_SIZE 4096
42
43 char curl_errorstr[CURL_ERROR_SIZE];
44
45 static int curl_ssl_verify = -1;
46 static int curl_ssl_try;
47 static const char *ssl_cert;
48 static const char *ssl_cipherlist;
49 static const char *ssl_version;
50 static struct {
51 const char *name;
52 long ssl_version;
53 } sslversions[] = {
54 { "sslv2", CURL_SSLVERSION_SSLv2 },
55 { "sslv3", CURL_SSLVERSION_SSLv3 },
56 { "tlsv1", CURL_SSLVERSION_TLSv1 },
57 #if LIBCURL_VERSION_NUM >= 0x072200
58 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
59 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
60 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
61 #endif
62 };
63 #if LIBCURL_VERSION_NUM >= 0x070903
64 static const char *ssl_key;
65 #endif
66 #if LIBCURL_VERSION_NUM >= 0x070908
67 static const char *ssl_capath;
68 #endif
69 #if LIBCURL_VERSION_NUM >= 0x072c00
70 static const char *ssl_pinnedkey;
71 #endif
72 static const char *ssl_cainfo;
73 static long curl_low_speed_limit = -1;
74 static long curl_low_speed_time = -1;
75 static int curl_ftp_no_epsv;
76 static const char *curl_http_proxy;
77 static const char *curl_no_proxy;
78 static const char *http_proxy_authmethod;
79 static struct {
80 const char *name;
81 long curlauth_param;
82 } proxy_authmethods[] = {
83 { "basic", CURLAUTH_BASIC },
84 { "digest", CURLAUTH_DIGEST },
85 { "negotiate", CURLAUTH_GSSNEGOTIATE },
86 { "ntlm", CURLAUTH_NTLM },
87 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
88 { "anyauth", CURLAUTH_ANY },
89 #endif
90 /*
91 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
92 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
93 * here, too
94 */
95 };
96 #ifdef CURLGSSAPI_DELEGATION_FLAG
97 static const char *curl_deleg;
98 static struct {
99 const char *name;
100 long curl_deleg_param;
101 } curl_deleg_levels[] = {
102 { "none", CURLGSSAPI_DELEGATION_NONE },
103 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
104 { "always", CURLGSSAPI_DELEGATION_FLAG },
105 };
106 #endif
107
108 static struct credential proxy_auth = CREDENTIAL_INIT;
109 static const char *curl_proxyuserpwd;
110 static const char *curl_cookie_file;
111 static int curl_save_cookies;
112 struct credential http_auth = CREDENTIAL_INIT;
113 static int http_proactive_auth;
114 static const char *user_agent;
115 static int curl_empty_auth = -1;
116
117 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
118
119 #if LIBCURL_VERSION_NUM >= 0x071700
120 /* Use CURLOPT_KEYPASSWD as is */
121 #elif LIBCURL_VERSION_NUM >= 0x070903
122 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
123 #else
124 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
125 #endif
126
127 static struct credential cert_auth = CREDENTIAL_INIT;
128 static int ssl_cert_password_required;
129 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
130 static unsigned long http_auth_methods = CURLAUTH_ANY;
131 static int http_auth_methods_restricted;
132 /* Modes for which empty_auth cannot actually help us. */
133 static unsigned long empty_auth_useless =
134 CURLAUTH_BASIC
135 #ifdef CURLAUTH_DIGEST_IE
136 | CURLAUTH_DIGEST_IE
137 #endif
138 | CURLAUTH_DIGEST;
139 #endif
140
141 static struct curl_slist *pragma_header;
142 static struct curl_slist *no_pragma_header;
143 static struct curl_slist *extra_http_headers;
144
145 static struct active_request_slot *active_queue_head;
146
147 static char *cached_accept_language;
148
149 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
150 {
151 size_t size = eltsize * nmemb;
152 struct buffer *buffer = buffer_;
153
154 if (size > buffer->buf.len - buffer->posn)
155 size = buffer->buf.len - buffer->posn;
156 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
157 buffer->posn += size;
158
159 return size;
160 }
161
162 #ifndef NO_CURL_IOCTL
163 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
164 {
165 struct buffer *buffer = clientp;
166
167 switch (cmd) {
168 case CURLIOCMD_NOP:
169 return CURLIOE_OK;
170
171 case CURLIOCMD_RESTARTREAD:
172 buffer->posn = 0;
173 return CURLIOE_OK;
174
175 default:
176 return CURLIOE_UNKNOWNCMD;
177 }
178 }
179 #endif
180
181 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
182 {
183 size_t size = eltsize * nmemb;
184 struct strbuf *buffer = buffer_;
185
186 strbuf_add(buffer, ptr, size);
187 return size;
188 }
189
190 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
191 {
192 return eltsize * nmemb;
193 }
194
195 static void closedown_active_slot(struct active_request_slot *slot)
196 {
197 active_requests--;
198 slot->in_use = 0;
199 }
200
201 static void finish_active_slot(struct active_request_slot *slot)
202 {
203 closedown_active_slot(slot);
204 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
205
206 if (slot->finished != NULL)
207 (*slot->finished) = 1;
208
209 /* Store slot results so they can be read after the slot is reused */
210 if (slot->results != NULL) {
211 slot->results->curl_result = slot->curl_result;
212 slot->results->http_code = slot->http_code;
213 #if LIBCURL_VERSION_NUM >= 0x070a08
214 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
215 &slot->results->auth_avail);
216 #else
217 slot->results->auth_avail = 0;
218 #endif
219
220 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
221 &slot->results->http_connectcode);
222 }
223
224 /* Run callback if appropriate */
225 if (slot->callback_func != NULL)
226 slot->callback_func(slot->callback_data);
227 }
228
229 static void xmulti_remove_handle(struct active_request_slot *slot)
230 {
231 #ifdef USE_CURL_MULTI
232 curl_multi_remove_handle(curlm, slot->curl);
233 #endif
234 }
235
236 #ifdef USE_CURL_MULTI
237 static void process_curl_messages(void)
238 {
239 int num_messages;
240 struct active_request_slot *slot;
241 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
242
243 while (curl_message != NULL) {
244 if (curl_message->msg == CURLMSG_DONE) {
245 int curl_result = curl_message->data.result;
246 slot = active_queue_head;
247 while (slot != NULL &&
248 slot->curl != curl_message->easy_handle)
249 slot = slot->next;
250 if (slot != NULL) {
251 xmulti_remove_handle(slot);
252 slot->curl_result = curl_result;
253 finish_active_slot(slot);
254 } else {
255 fprintf(stderr, "Received DONE message for unknown request!\n");
256 }
257 } else {
258 fprintf(stderr, "Unknown CURL message received: %d\n",
259 (int)curl_message->msg);
260 }
261 curl_message = curl_multi_info_read(curlm, &num_messages);
262 }
263 }
264 #endif
265
266 static int http_options(const char *var, const char *value, void *cb)
267 {
268 if (!strcmp("http.sslverify", var)) {
269 curl_ssl_verify = git_config_bool(var, value);
270 return 0;
271 }
272 if (!strcmp("http.sslcipherlist", var))
273 return git_config_string(&ssl_cipherlist, var, value);
274 if (!strcmp("http.sslversion", var))
275 return git_config_string(&ssl_version, var, value);
276 if (!strcmp("http.sslcert", var))
277 return git_config_pathname(&ssl_cert, var, value);
278 #if LIBCURL_VERSION_NUM >= 0x070903
279 if (!strcmp("http.sslkey", var))
280 return git_config_pathname(&ssl_key, var, value);
281 #endif
282 #if LIBCURL_VERSION_NUM >= 0x070908
283 if (!strcmp("http.sslcapath", var))
284 return git_config_pathname(&ssl_capath, var, value);
285 #endif
286 if (!strcmp("http.sslcainfo", var))
287 return git_config_pathname(&ssl_cainfo, var, value);
288 if (!strcmp("http.sslcertpasswordprotected", var)) {
289 ssl_cert_password_required = git_config_bool(var, value);
290 return 0;
291 }
292 if (!strcmp("http.ssltry", var)) {
293 curl_ssl_try = git_config_bool(var, value);
294 return 0;
295 }
296 if (!strcmp("http.minsessions", var)) {
297 min_curl_sessions = git_config_int(var, value);
298 #ifndef USE_CURL_MULTI
299 if (min_curl_sessions > 1)
300 min_curl_sessions = 1;
301 #endif
302 return 0;
303 }
304 #ifdef USE_CURL_MULTI
305 if (!strcmp("http.maxrequests", var)) {
306 max_requests = git_config_int(var, value);
307 return 0;
308 }
309 #endif
310 if (!strcmp("http.lowspeedlimit", var)) {
311 curl_low_speed_limit = (long)git_config_int(var, value);
312 return 0;
313 }
314 if (!strcmp("http.lowspeedtime", var)) {
315 curl_low_speed_time = (long)git_config_int(var, value);
316 return 0;
317 }
318
319 if (!strcmp("http.noepsv", var)) {
320 curl_ftp_no_epsv = git_config_bool(var, value);
321 return 0;
322 }
323 if (!strcmp("http.proxy", var))
324 return git_config_string(&curl_http_proxy, var, value);
325
326 if (!strcmp("http.proxyauthmethod", var))
327 return git_config_string(&http_proxy_authmethod, var, value);
328
329 if (!strcmp("http.cookiefile", var))
330 return git_config_pathname(&curl_cookie_file, var, value);
331 if (!strcmp("http.savecookies", var)) {
332 curl_save_cookies = git_config_bool(var, value);
333 return 0;
334 }
335
336 if (!strcmp("http.postbuffer", var)) {
337 http_post_buffer = git_config_ssize_t(var, value);
338 if (http_post_buffer < 0)
339 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
340 if (http_post_buffer < LARGE_PACKET_MAX)
341 http_post_buffer = LARGE_PACKET_MAX;
342 return 0;
343 }
344
345 if (!strcmp("http.useragent", var))
346 return git_config_string(&user_agent, var, value);
347
348 if (!strcmp("http.emptyauth", var)) {
349 if (value && !strcmp("auto", value))
350 curl_empty_auth = -1;
351 else
352 curl_empty_auth = git_config_bool(var, value);
353 return 0;
354 }
355
356 if (!strcmp("http.delegation", var)) {
357 #ifdef CURLGSSAPI_DELEGATION_FLAG
358 return git_config_string(&curl_deleg, var, value);
359 #else
360 warning(_("Delegation control is not supported with cURL < 7.22.0"));
361 return 0;
362 #endif
363 }
364
365 if (!strcmp("http.pinnedpubkey", var)) {
366 #if LIBCURL_VERSION_NUM >= 0x072c00
367 return git_config_pathname(&ssl_pinnedkey, var, value);
368 #else
369 warning(_("Public key pinning not supported with cURL < 7.44.0"));
370 return 0;
371 #endif
372 }
373
374 if (!strcmp("http.extraheader", var)) {
375 if (!value) {
376 return config_error_nonbool(var);
377 } else if (!*value) {
378 curl_slist_free_all(extra_http_headers);
379 extra_http_headers = NULL;
380 } else {
381 extra_http_headers =
382 curl_slist_append(extra_http_headers, value);
383 }
384 return 0;
385 }
386
387 if (!strcmp("http.followredirects", var)) {
388 if (value && !strcmp(value, "initial"))
389 http_follow_config = HTTP_FOLLOW_INITIAL;
390 else if (git_config_bool(var, value))
391 http_follow_config = HTTP_FOLLOW_ALWAYS;
392 else
393 http_follow_config = HTTP_FOLLOW_NONE;
394 return 0;
395 }
396
397 /* Fall back on the default ones */
398 return git_default_config(var, value, cb);
399 }
400
401 static int curl_empty_auth_enabled(void)
402 {
403 if (curl_empty_auth >= 0)
404 return curl_empty_auth;
405
406 #ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
407 /*
408 * Our libcurl is too old to do AUTH_ANY in the first place;
409 * just default to turning the feature off.
410 */
411 #else
412 /*
413 * In the automatic case, kick in the empty-auth
414 * hack as long as we would potentially try some
415 * method more exotic than "Basic" or "Digest".
416 *
417 * But only do this when this is our second or
418 * subsequent request, as by then we know what
419 * methods are available.
420 */
421 if (http_auth_methods_restricted &&
422 (http_auth_methods & ~empty_auth_useless))
423 return 1;
424 #endif
425 return 0;
426 }
427
428 static void init_curl_http_auth(CURL *result)
429 {
430 if (!http_auth.username || !*http_auth.username) {
431 if (curl_empty_auth_enabled())
432 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
433 return;
434 }
435
436 credential_fill(&http_auth);
437
438 #if LIBCURL_VERSION_NUM >= 0x071301
439 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
440 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
441 #else
442 {
443 static struct strbuf up = STRBUF_INIT;
444 /*
445 * Note that we assume we only ever have a single set of
446 * credentials in a given program run, so we do not have
447 * to worry about updating this buffer, only setting its
448 * initial value.
449 */
450 if (!up.len)
451 strbuf_addf(&up, "%s:%s",
452 http_auth.username, http_auth.password);
453 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
454 }
455 #endif
456 }
457
458 /* *var must be free-able */
459 static void var_override(const char **var, char *value)
460 {
461 if (value) {
462 free((void *)*var);
463 *var = xstrdup(value);
464 }
465 }
466
467 static void set_proxyauth_name_password(CURL *result)
468 {
469 #if LIBCURL_VERSION_NUM >= 0x071301
470 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
471 proxy_auth.username);
472 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
473 proxy_auth.password);
474 #else
475 struct strbuf s = STRBUF_INIT;
476
477 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
478 strbuf_addch(&s, ':');
479 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
480 curl_proxyuserpwd = strbuf_detach(&s, NULL);
481 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
482 #endif
483 }
484
485 static void init_curl_proxy_auth(CURL *result)
486 {
487 if (proxy_auth.username) {
488 if (!proxy_auth.password)
489 credential_fill(&proxy_auth);
490 set_proxyauth_name_password(result);
491 }
492
493 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
494
495 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
496 if (http_proxy_authmethod) {
497 int i;
498 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
499 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
500 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
501 proxy_authmethods[i].curlauth_param);
502 break;
503 }
504 }
505 if (i == ARRAY_SIZE(proxy_authmethods)) {
506 warning("unsupported proxy authentication method %s: using anyauth",
507 http_proxy_authmethod);
508 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
509 }
510 }
511 else
512 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
513 #endif
514 }
515
516 static int has_cert_password(void)
517 {
518 if (ssl_cert == NULL || ssl_cert_password_required != 1)
519 return 0;
520 if (!cert_auth.password) {
521 cert_auth.protocol = xstrdup("cert");
522 cert_auth.username = xstrdup("");
523 cert_auth.path = xstrdup(ssl_cert);
524 credential_fill(&cert_auth);
525 }
526 return 1;
527 }
528
529 #if LIBCURL_VERSION_NUM >= 0x071900
530 static void set_curl_keepalive(CURL *c)
531 {
532 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
533 }
534
535 #elif LIBCURL_VERSION_NUM >= 0x071000
536 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
537 {
538 int ka = 1;
539 int rc;
540 socklen_t len = (socklen_t)sizeof(ka);
541
542 if (type != CURLSOCKTYPE_IPCXN)
543 return 0;
544
545 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
546 if (rc < 0)
547 warning_errno("unable to set SO_KEEPALIVE on socket");
548
549 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
550 }
551
552 static void set_curl_keepalive(CURL *c)
553 {
554 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
555 }
556
557 #else
558 static void set_curl_keepalive(CURL *c)
559 {
560 /* not supported on older curl versions */
561 }
562 #endif
563
564 static void redact_sensitive_header(struct strbuf *header)
565 {
566 const char *sensitive_header;
567
568 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
569 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
570 /* The first token is the type, which is OK to log */
571 while (isspace(*sensitive_header))
572 sensitive_header++;
573 while (*sensitive_header && !isspace(*sensitive_header))
574 sensitive_header++;
575 /* Everything else is opaque and possibly sensitive */
576 strbuf_setlen(header, sensitive_header - header->buf);
577 strbuf_addstr(header, " <redacted>");
578 }
579 }
580
581 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
582 {
583 struct strbuf out = STRBUF_INIT;
584 struct strbuf **headers, **header;
585
586 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
587 text, (long)size, (long)size);
588 trace_strbuf(&trace_curl, &out);
589 strbuf_reset(&out);
590 strbuf_add(&out, ptr, size);
591 headers = strbuf_split_max(&out, '\n', 0);
592
593 for (header = headers; *header; header++) {
594 if (hide_sensitive_header)
595 redact_sensitive_header(*header);
596 strbuf_insert((*header), 0, text, strlen(text));
597 strbuf_insert((*header), strlen(text), ": ", 2);
598 strbuf_rtrim((*header));
599 strbuf_addch((*header), '\n');
600 trace_strbuf(&trace_curl, (*header));
601 }
602 strbuf_list_free(headers);
603 strbuf_release(&out);
604 }
605
606 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
607 {
608 size_t i;
609 struct strbuf out = STRBUF_INIT;
610 unsigned int width = 60;
611
612 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
613 text, (long)size, (long)size);
614 trace_strbuf(&trace_curl, &out);
615
616 for (i = 0; i < size; i += width) {
617 size_t w;
618
619 strbuf_reset(&out);
620 strbuf_addf(&out, "%s: ", text);
621 for (w = 0; (w < width) && (i + w < size); w++) {
622 unsigned char ch = ptr[i + w];
623
624 strbuf_addch(&out,
625 (ch >= 0x20) && (ch < 0x80)
626 ? ch : '.');
627 }
628 strbuf_addch(&out, '\n');
629 trace_strbuf(&trace_curl, &out);
630 }
631 strbuf_release(&out);
632 }
633
634 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
635 {
636 const char *text;
637 enum { NO_FILTER = 0, DO_FILTER = 1 };
638
639 switch (type) {
640 case CURLINFO_TEXT:
641 trace_printf_key(&trace_curl, "== Info: %s", data);
642 default: /* we ignore unknown types by default */
643 return 0;
644
645 case CURLINFO_HEADER_OUT:
646 text = "=> Send header";
647 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
648 break;
649 case CURLINFO_DATA_OUT:
650 text = "=> Send data";
651 curl_dump_data(text, (unsigned char *)data, size);
652 break;
653 case CURLINFO_SSL_DATA_OUT:
654 text = "=> Send SSL data";
655 curl_dump_data(text, (unsigned char *)data, size);
656 break;
657 case CURLINFO_HEADER_IN:
658 text = "<= Recv header";
659 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
660 break;
661 case CURLINFO_DATA_IN:
662 text = "<= Recv data";
663 curl_dump_data(text, (unsigned char *)data, size);
664 break;
665 case CURLINFO_SSL_DATA_IN:
666 text = "<= Recv SSL data";
667 curl_dump_data(text, (unsigned char *)data, size);
668 break;
669 }
670 return 0;
671 }
672
673 void setup_curl_trace(CURL *handle)
674 {
675 if (!trace_want(&trace_curl))
676 return;
677 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
678 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
679 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
680 }
681
682 #ifdef CURLPROTO_HTTP
683 static long get_curl_allowed_protocols(int from_user)
684 {
685 long allowed_protocols = 0;
686
687 if (is_transport_allowed("http", from_user))
688 allowed_protocols |= CURLPROTO_HTTP;
689 if (is_transport_allowed("https", from_user))
690 allowed_protocols |= CURLPROTO_HTTPS;
691 if (is_transport_allowed("ftp", from_user))
692 allowed_protocols |= CURLPROTO_FTP;
693 if (is_transport_allowed("ftps", from_user))
694 allowed_protocols |= CURLPROTO_FTPS;
695
696 return allowed_protocols;
697 }
698 #endif
699
700 static CURL *get_curl_handle(void)
701 {
702 CURL *result = curl_easy_init();
703
704 if (!result)
705 die("curl_easy_init failed");
706
707 if (!curl_ssl_verify) {
708 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
709 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
710 } else {
711 /* Verify authenticity of the peer's certificate */
712 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
713 /* The name in the cert must match whom we tried to connect */
714 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
715 }
716
717 #if LIBCURL_VERSION_NUM >= 0x070907
718 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
719 #endif
720 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
721 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
722 #endif
723
724 #ifdef CURLGSSAPI_DELEGATION_FLAG
725 if (curl_deleg) {
726 int i;
727 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
728 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
729 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
730 curl_deleg_levels[i].curl_deleg_param);
731 break;
732 }
733 }
734 if (i == ARRAY_SIZE(curl_deleg_levels))
735 warning("Unknown delegation method '%s': using default",
736 curl_deleg);
737 }
738 #endif
739
740 if (http_proactive_auth)
741 init_curl_http_auth(result);
742
743 if (getenv("GIT_SSL_VERSION"))
744 ssl_version = getenv("GIT_SSL_VERSION");
745 if (ssl_version && *ssl_version) {
746 int i;
747 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
748 if (!strcmp(ssl_version, sslversions[i].name)) {
749 curl_easy_setopt(result, CURLOPT_SSLVERSION,
750 sslversions[i].ssl_version);
751 break;
752 }
753 }
754 if (i == ARRAY_SIZE(sslversions))
755 warning("unsupported ssl version %s: using default",
756 ssl_version);
757 }
758
759 if (getenv("GIT_SSL_CIPHER_LIST"))
760 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
761 if (ssl_cipherlist != NULL && *ssl_cipherlist)
762 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
763 ssl_cipherlist);
764
765 if (ssl_cert != NULL)
766 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
767 if (has_cert_password())
768 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
769 #if LIBCURL_VERSION_NUM >= 0x070903
770 if (ssl_key != NULL)
771 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
772 #endif
773 #if LIBCURL_VERSION_NUM >= 0x070908
774 if (ssl_capath != NULL)
775 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
776 #endif
777 #if LIBCURL_VERSION_NUM >= 0x072c00
778 if (ssl_pinnedkey != NULL)
779 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
780 #endif
781 if (ssl_cainfo != NULL)
782 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
783
784 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
785 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
786 curl_low_speed_limit);
787 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
788 curl_low_speed_time);
789 }
790
791 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
792 #if LIBCURL_VERSION_NUM >= 0x071301
793 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
794 #elif LIBCURL_VERSION_NUM >= 0x071101
795 curl_easy_setopt(result, CURLOPT_POST301, 1);
796 #endif
797 #ifdef CURLPROTO_HTTP
798 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
799 get_curl_allowed_protocols(0));
800 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
801 get_curl_allowed_protocols(-1));
802 #else
803 warning("protocol restrictions not applied to curl redirects because\n"
804 "your curl version is too old (>= 7.19.4)");
805 #endif
806 if (getenv("GIT_CURL_VERBOSE"))
807 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
808 setup_curl_trace(result);
809
810 curl_easy_setopt(result, CURLOPT_USERAGENT,
811 user_agent ? user_agent : git_user_agent());
812
813 if (curl_ftp_no_epsv)
814 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
815
816 #ifdef CURLOPT_USE_SSL
817 if (curl_ssl_try)
818 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
819 #endif
820
821 /*
822 * CURL also examines these variables as a fallback; but we need to query
823 * them here in order to decide whether to prompt for missing password (cf.
824 * init_curl_proxy_auth()).
825 *
826 * Unlike many other common environment variables, these are historically
827 * lowercase only. It appears that CURL did not know this and implemented
828 * only uppercase variants, which was later corrected to take both - with
829 * the exception of http_proxy, which is lowercase only also in CURL. As
830 * the lowercase versions are the historical quasi-standard, they take
831 * precedence here, as in CURL.
832 */
833 if (!curl_http_proxy) {
834 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
835 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
836 var_override(&curl_http_proxy, getenv("https_proxy"));
837 } else {
838 var_override(&curl_http_proxy, getenv("http_proxy"));
839 }
840 if (!curl_http_proxy) {
841 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
842 var_override(&curl_http_proxy, getenv("all_proxy"));
843 }
844 }
845
846 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
847 /*
848 * Handle case with the empty http.proxy value here to keep
849 * common code clean.
850 * NB: empty option disables proxying at all.
851 */
852 curl_easy_setopt(result, CURLOPT_PROXY, "");
853 } else if (curl_http_proxy) {
854 #if LIBCURL_VERSION_NUM >= 0x071800
855 if (starts_with(curl_http_proxy, "socks5h"))
856 curl_easy_setopt(result,
857 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
858 else if (starts_with(curl_http_proxy, "socks5"))
859 curl_easy_setopt(result,
860 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
861 else if (starts_with(curl_http_proxy, "socks4a"))
862 curl_easy_setopt(result,
863 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
864 else if (starts_with(curl_http_proxy, "socks"))
865 curl_easy_setopt(result,
866 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
867 #endif
868 if (strstr(curl_http_proxy, "://"))
869 credential_from_url(&proxy_auth, curl_http_proxy);
870 else {
871 struct strbuf url = STRBUF_INIT;
872 strbuf_addf(&url, "http://%s", curl_http_proxy);
873 credential_from_url(&proxy_auth, url.buf);
874 strbuf_release(&url);
875 }
876
877 if (!proxy_auth.host)
878 die("Invalid proxy URL '%s'", curl_http_proxy);
879
880 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
881 #if LIBCURL_VERSION_NUM >= 0x071304
882 var_override(&curl_no_proxy, getenv("NO_PROXY"));
883 var_override(&curl_no_proxy, getenv("no_proxy"));
884 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
885 #endif
886 }
887 init_curl_proxy_auth(result);
888
889 set_curl_keepalive(result);
890
891 return result;
892 }
893
894 static void set_from_env(const char **var, const char *envname)
895 {
896 const char *val = getenv(envname);
897 if (val)
898 *var = val;
899 }
900
901 static void protocol_http_header(void)
902 {
903 if (get_protocol_version_config() > 0) {
904 struct strbuf protocol_header = STRBUF_INIT;
905
906 strbuf_addf(&protocol_header, GIT_PROTOCOL_HEADER ": version=%d",
907 get_protocol_version_config());
908
909
910 extra_http_headers = curl_slist_append(extra_http_headers,
911 protocol_header.buf);
912 strbuf_release(&protocol_header);
913 }
914 }
915
916 void http_init(struct remote *remote, const char *url, int proactive_auth)
917 {
918 char *low_speed_limit;
919 char *low_speed_time;
920 char *normalized_url;
921 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
922
923 config.section = "http";
924 config.key = NULL;
925 config.collect_fn = http_options;
926 config.cascade_fn = git_default_config;
927 config.cb = NULL;
928
929 http_is_verbose = 0;
930 normalized_url = url_normalize(url, &config.url);
931
932 git_config(urlmatch_config_entry, &config);
933 free(normalized_url);
934
935 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
936 die("curl_global_init failed");
937
938 http_proactive_auth = proactive_auth;
939
940 if (remote && remote->http_proxy)
941 curl_http_proxy = xstrdup(remote->http_proxy);
942
943 if (remote)
944 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
945
946 protocol_http_header();
947
948 pragma_header = curl_slist_append(http_copy_default_headers(),
949 "Pragma: no-cache");
950 no_pragma_header = curl_slist_append(http_copy_default_headers(),
951 "Pragma:");
952
953 #ifdef USE_CURL_MULTI
954 {
955 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
956 if (http_max_requests != NULL)
957 max_requests = atoi(http_max_requests);
958 }
959
960 curlm = curl_multi_init();
961 if (!curlm)
962 die("curl_multi_init failed");
963 #endif
964
965 if (getenv("GIT_SSL_NO_VERIFY"))
966 curl_ssl_verify = 0;
967
968 set_from_env(&ssl_cert, "GIT_SSL_CERT");
969 #if LIBCURL_VERSION_NUM >= 0x070903
970 set_from_env(&ssl_key, "GIT_SSL_KEY");
971 #endif
972 #if LIBCURL_VERSION_NUM >= 0x070908
973 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
974 #endif
975 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
976
977 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
978
979 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
980 if (low_speed_limit != NULL)
981 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
982 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
983 if (low_speed_time != NULL)
984 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
985
986 if (curl_ssl_verify == -1)
987 curl_ssl_verify = 1;
988
989 curl_session_count = 0;
990 #ifdef USE_CURL_MULTI
991 if (max_requests < 1)
992 max_requests = DEFAULT_MAX_REQUESTS;
993 #endif
994
995 if (getenv("GIT_CURL_FTP_NO_EPSV"))
996 curl_ftp_no_epsv = 1;
997
998 if (url) {
999 credential_from_url(&http_auth, url);
1000 if (!ssl_cert_password_required &&
1001 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
1002 starts_with(url, "https://"))
1003 ssl_cert_password_required = 1;
1004 }
1005
1006 #ifndef NO_CURL_EASY_DUPHANDLE
1007 curl_default = get_curl_handle();
1008 #endif
1009 }
1010
1011 void http_cleanup(void)
1012 {
1013 struct active_request_slot *slot = active_queue_head;
1014
1015 while (slot != NULL) {
1016 struct active_request_slot *next = slot->next;
1017 if (slot->curl != NULL) {
1018 xmulti_remove_handle(slot);
1019 curl_easy_cleanup(slot->curl);
1020 }
1021 free(slot);
1022 slot = next;
1023 }
1024 active_queue_head = NULL;
1025
1026 #ifndef NO_CURL_EASY_DUPHANDLE
1027 curl_easy_cleanup(curl_default);
1028 #endif
1029
1030 #ifdef USE_CURL_MULTI
1031 curl_multi_cleanup(curlm);
1032 #endif
1033 curl_global_cleanup();
1034
1035 curl_slist_free_all(extra_http_headers);
1036 extra_http_headers = NULL;
1037
1038 curl_slist_free_all(pragma_header);
1039 pragma_header = NULL;
1040
1041 curl_slist_free_all(no_pragma_header);
1042 no_pragma_header = NULL;
1043
1044 if (curl_http_proxy) {
1045 free((void *)curl_http_proxy);
1046 curl_http_proxy = NULL;
1047 }
1048
1049 if (proxy_auth.password) {
1050 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1051 FREE_AND_NULL(proxy_auth.password);
1052 }
1053
1054 free((void *)curl_proxyuserpwd);
1055 curl_proxyuserpwd = NULL;
1056
1057 free((void *)http_proxy_authmethod);
1058 http_proxy_authmethod = NULL;
1059
1060 if (cert_auth.password != NULL) {
1061 memset(cert_auth.password, 0, strlen(cert_auth.password));
1062 FREE_AND_NULL(cert_auth.password);
1063 }
1064 ssl_cert_password_required = 0;
1065
1066 FREE_AND_NULL(cached_accept_language);
1067 }
1068
1069 struct active_request_slot *get_active_slot(void)
1070 {
1071 struct active_request_slot *slot = active_queue_head;
1072 struct active_request_slot *newslot;
1073
1074 #ifdef USE_CURL_MULTI
1075 int num_transfers;
1076
1077 /* Wait for a slot to open up if the queue is full */
1078 while (active_requests >= max_requests) {
1079 curl_multi_perform(curlm, &num_transfers);
1080 if (num_transfers < active_requests)
1081 process_curl_messages();
1082 }
1083 #endif
1084
1085 while (slot != NULL && slot->in_use)
1086 slot = slot->next;
1087
1088 if (slot == NULL) {
1089 newslot = xmalloc(sizeof(*newslot));
1090 newslot->curl = NULL;
1091 newslot->in_use = 0;
1092 newslot->next = NULL;
1093
1094 slot = active_queue_head;
1095 if (slot == NULL) {
1096 active_queue_head = newslot;
1097 } else {
1098 while (slot->next != NULL)
1099 slot = slot->next;
1100 slot->next = newslot;
1101 }
1102 slot = newslot;
1103 }
1104
1105 if (slot->curl == NULL) {
1106 #ifdef NO_CURL_EASY_DUPHANDLE
1107 slot->curl = get_curl_handle();
1108 #else
1109 slot->curl = curl_easy_duphandle(curl_default);
1110 #endif
1111 curl_session_count++;
1112 }
1113
1114 active_requests++;
1115 slot->in_use = 1;
1116 slot->results = NULL;
1117 slot->finished = NULL;
1118 slot->callback_data = NULL;
1119 slot->callback_func = NULL;
1120 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1121 if (curl_save_cookies)
1122 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1123 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1124 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1125 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1126 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1127 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1128 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1129 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1130 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1131 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1132 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1133
1134 /*
1135 * Default following to off unless "ALWAYS" is configured; this gives
1136 * callers a sane starting point, and they can tweak for individual
1137 * HTTP_FOLLOW_* cases themselves.
1138 */
1139 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1140 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1141 else
1142 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1143
1144 #if LIBCURL_VERSION_NUM >= 0x070a08
1145 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1146 #endif
1147 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1148 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1149 #endif
1150 if (http_auth.password || curl_empty_auth_enabled())
1151 init_curl_http_auth(slot->curl);
1152
1153 return slot;
1154 }
1155
1156 int start_active_slot(struct active_request_slot *slot)
1157 {
1158 #ifdef USE_CURL_MULTI
1159 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1160 int num_transfers;
1161
1162 if (curlm_result != CURLM_OK &&
1163 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1164 warning("curl_multi_add_handle failed: %s",
1165 curl_multi_strerror(curlm_result));
1166 active_requests--;
1167 slot->in_use = 0;
1168 return 0;
1169 }
1170
1171 /*
1172 * We know there must be something to do, since we just added
1173 * something.
1174 */
1175 curl_multi_perform(curlm, &num_transfers);
1176 #endif
1177 return 1;
1178 }
1179
1180 #ifdef USE_CURL_MULTI
1181 struct fill_chain {
1182 void *data;
1183 int (*fill)(void *);
1184 struct fill_chain *next;
1185 };
1186
1187 static struct fill_chain *fill_cfg;
1188
1189 void add_fill_function(void *data, int (*fill)(void *))
1190 {
1191 struct fill_chain *new = xmalloc(sizeof(*new));
1192 struct fill_chain **linkp = &fill_cfg;
1193 new->data = data;
1194 new->fill = fill;
1195 new->next = NULL;
1196 while (*linkp)
1197 linkp = &(*linkp)->next;
1198 *linkp = new;
1199 }
1200
1201 void fill_active_slots(void)
1202 {
1203 struct active_request_slot *slot = active_queue_head;
1204
1205 while (active_requests < max_requests) {
1206 struct fill_chain *fill;
1207 for (fill = fill_cfg; fill; fill = fill->next)
1208 if (fill->fill(fill->data))
1209 break;
1210
1211 if (!fill)
1212 break;
1213 }
1214
1215 while (slot != NULL) {
1216 if (!slot->in_use && slot->curl != NULL
1217 && curl_session_count > min_curl_sessions) {
1218 curl_easy_cleanup(slot->curl);
1219 slot->curl = NULL;
1220 curl_session_count--;
1221 }
1222 slot = slot->next;
1223 }
1224 }
1225
1226 void step_active_slots(void)
1227 {
1228 int num_transfers;
1229 CURLMcode curlm_result;
1230
1231 do {
1232 curlm_result = curl_multi_perform(curlm, &num_transfers);
1233 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1234 if (num_transfers < active_requests) {
1235 process_curl_messages();
1236 fill_active_slots();
1237 }
1238 }
1239 #endif
1240
1241 void run_active_slot(struct active_request_slot *slot)
1242 {
1243 #ifdef USE_CURL_MULTI
1244 fd_set readfds;
1245 fd_set writefds;
1246 fd_set excfds;
1247 int max_fd;
1248 struct timeval select_timeout;
1249 int finished = 0;
1250
1251 slot->finished = &finished;
1252 while (!finished) {
1253 step_active_slots();
1254
1255 if (slot->in_use) {
1256 #if LIBCURL_VERSION_NUM >= 0x070f04
1257 long curl_timeout;
1258 curl_multi_timeout(curlm, &curl_timeout);
1259 if (curl_timeout == 0) {
1260 continue;
1261 } else if (curl_timeout == -1) {
1262 select_timeout.tv_sec = 0;
1263 select_timeout.tv_usec = 50000;
1264 } else {
1265 select_timeout.tv_sec = curl_timeout / 1000;
1266 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1267 }
1268 #else
1269 select_timeout.tv_sec = 0;
1270 select_timeout.tv_usec = 50000;
1271 #endif
1272
1273 max_fd = -1;
1274 FD_ZERO(&readfds);
1275 FD_ZERO(&writefds);
1276 FD_ZERO(&excfds);
1277 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1278
1279 /*
1280 * It can happen that curl_multi_timeout returns a pathologically
1281 * long timeout when curl_multi_fdset returns no file descriptors
1282 * to read. See commit message for more details.
1283 */
1284 if (max_fd < 0 &&
1285 (select_timeout.tv_sec > 0 ||
1286 select_timeout.tv_usec > 50000)) {
1287 select_timeout.tv_sec = 0;
1288 select_timeout.tv_usec = 50000;
1289 }
1290
1291 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1292 }
1293 }
1294 #else
1295 while (slot->in_use) {
1296 slot->curl_result = curl_easy_perform(slot->curl);
1297 finish_active_slot(slot);
1298 }
1299 #endif
1300 }
1301
1302 static void release_active_slot(struct active_request_slot *slot)
1303 {
1304 closedown_active_slot(slot);
1305 if (slot->curl) {
1306 xmulti_remove_handle(slot);
1307 if (curl_session_count > min_curl_sessions) {
1308 curl_easy_cleanup(slot->curl);
1309 slot->curl = NULL;
1310 curl_session_count--;
1311 }
1312 }
1313 #ifdef USE_CURL_MULTI
1314 fill_active_slots();
1315 #endif
1316 }
1317
1318 void finish_all_active_slots(void)
1319 {
1320 struct active_request_slot *slot = active_queue_head;
1321
1322 while (slot != NULL)
1323 if (slot->in_use) {
1324 run_active_slot(slot);
1325 slot = active_queue_head;
1326 } else {
1327 slot = slot->next;
1328 }
1329 }
1330
1331 /* Helpers for modifying and creating URLs */
1332 static inline int needs_quote(int ch)
1333 {
1334 if (((ch >= 'A') && (ch <= 'Z'))
1335 || ((ch >= 'a') && (ch <= 'z'))
1336 || ((ch >= '0') && (ch <= '9'))
1337 || (ch == '/')
1338 || (ch == '-')
1339 || (ch == '.'))
1340 return 0;
1341 return 1;
1342 }
1343
1344 static char *quote_ref_url(const char *base, const char *ref)
1345 {
1346 struct strbuf buf = STRBUF_INIT;
1347 const char *cp;
1348 int ch;
1349
1350 end_url_with_slash(&buf, base);
1351
1352 for (cp = ref; (ch = *cp) != 0; cp++)
1353 if (needs_quote(ch))
1354 strbuf_addf(&buf, "%%%02x", ch);
1355 else
1356 strbuf_addch(&buf, *cp);
1357
1358 return strbuf_detach(&buf, NULL);
1359 }
1360
1361 void append_remote_object_url(struct strbuf *buf, const char *url,
1362 const char *hex,
1363 int only_two_digit_prefix)
1364 {
1365 end_url_with_slash(buf, url);
1366
1367 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1368 if (!only_two_digit_prefix)
1369 strbuf_addstr(buf, hex + 2);
1370 }
1371
1372 char *get_remote_object_url(const char *url, const char *hex,
1373 int only_two_digit_prefix)
1374 {
1375 struct strbuf buf = STRBUF_INIT;
1376 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1377 return strbuf_detach(&buf, NULL);
1378 }
1379
1380 static int handle_curl_result(struct slot_results *results)
1381 {
1382 /*
1383 * If we see a failing http code with CURLE_OK, we have turned off
1384 * FAILONERROR (to keep the server's custom error response), and should
1385 * translate the code into failure here.
1386 *
1387 * Likewise, if we see a redirect (30x code), that means we turned off
1388 * redirect-following, and we should treat the result as an error.
1389 */
1390 if (results->curl_result == CURLE_OK &&
1391 results->http_code >= 300) {
1392 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1393 /*
1394 * Normally curl will already have put the "reason phrase"
1395 * from the server into curl_errorstr; unfortunately without
1396 * FAILONERROR it is lost, so we can give only the numeric
1397 * status code.
1398 */
1399 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1400 "The requested URL returned error: %ld",
1401 results->http_code);
1402 }
1403
1404 if (results->curl_result == CURLE_OK) {
1405 credential_approve(&http_auth);
1406 if (proxy_auth.password)
1407 credential_approve(&proxy_auth);
1408 return HTTP_OK;
1409 } else if (missing_target(results))
1410 return HTTP_MISSING_TARGET;
1411 else if (results->http_code == 401) {
1412 if (http_auth.username && http_auth.password) {
1413 credential_reject(&http_auth);
1414 return HTTP_NOAUTH;
1415 } else {
1416 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1417 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1418 if (results->auth_avail) {
1419 http_auth_methods &= results->auth_avail;
1420 http_auth_methods_restricted = 1;
1421 }
1422 #endif
1423 return HTTP_REAUTH;
1424 }
1425 } else {
1426 if (results->http_connectcode == 407)
1427 credential_reject(&proxy_auth);
1428 #if LIBCURL_VERSION_NUM >= 0x070c00
1429 if (!curl_errorstr[0])
1430 strlcpy(curl_errorstr,
1431 curl_easy_strerror(results->curl_result),
1432 sizeof(curl_errorstr));
1433 #endif
1434 return HTTP_ERROR;
1435 }
1436 }
1437
1438 int run_one_slot(struct active_request_slot *slot,
1439 struct slot_results *results)
1440 {
1441 slot->results = results;
1442 if (!start_active_slot(slot)) {
1443 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1444 "failed to start HTTP request");
1445 return HTTP_START_FAILED;
1446 }
1447
1448 run_active_slot(slot);
1449 return handle_curl_result(results);
1450 }
1451
1452 struct curl_slist *http_copy_default_headers(void)
1453 {
1454 struct curl_slist *headers = NULL, *h;
1455
1456 for (h = extra_http_headers; h; h = h->next)
1457 headers = curl_slist_append(headers, h->data);
1458
1459 return headers;
1460 }
1461
1462 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1463 {
1464 char *ptr;
1465 CURLcode ret;
1466
1467 strbuf_reset(buf);
1468 ret = curl_easy_getinfo(curl, info, &ptr);
1469 if (!ret && ptr)
1470 strbuf_addstr(buf, ptr);
1471 return ret;
1472 }
1473
1474 /*
1475 * Check for and extract a content-type parameter. "raw"
1476 * should be positioned at the start of the potential
1477 * parameter, with any whitespace already removed.
1478 *
1479 * "name" is the name of the parameter. The value is appended
1480 * to "out".
1481 */
1482 static int extract_param(const char *raw, const char *name,
1483 struct strbuf *out)
1484 {
1485 size_t len = strlen(name);
1486
1487 if (strncasecmp(raw, name, len))
1488 return -1;
1489 raw += len;
1490
1491 if (*raw != '=')
1492 return -1;
1493 raw++;
1494
1495 while (*raw && !isspace(*raw) && *raw != ';')
1496 strbuf_addch(out, *raw++);
1497 return 0;
1498 }
1499
1500 /*
1501 * Extract a normalized version of the content type, with any
1502 * spaces suppressed, all letters lowercased, and no trailing ";"
1503 * or parameters.
1504 *
1505 * Note that we will silently remove even invalid whitespace. For
1506 * example, "text / plain" is specifically forbidden by RFC 2616,
1507 * but "text/plain" is the only reasonable output, and this keeps
1508 * our code simple.
1509 *
1510 * If the "charset" argument is not NULL, store the value of any
1511 * charset parameter there.
1512 *
1513 * Example:
1514 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1515 * "text / plain" -> "text/plain"
1516 */
1517 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1518 struct strbuf *charset)
1519 {
1520 const char *p;
1521
1522 strbuf_reset(type);
1523 strbuf_grow(type, raw->len);
1524 for (p = raw->buf; *p; p++) {
1525 if (isspace(*p))
1526 continue;
1527 if (*p == ';') {
1528 p++;
1529 break;
1530 }
1531 strbuf_addch(type, tolower(*p));
1532 }
1533
1534 if (!charset)
1535 return;
1536
1537 strbuf_reset(charset);
1538 while (*p) {
1539 while (isspace(*p) || *p == ';')
1540 p++;
1541 if (!extract_param(p, "charset", charset))
1542 return;
1543 while (*p && !isspace(*p))
1544 p++;
1545 }
1546
1547 if (!charset->len && starts_with(type->buf, "text/"))
1548 strbuf_addstr(charset, "ISO-8859-1");
1549 }
1550
1551 static void write_accept_language(struct strbuf *buf)
1552 {
1553 /*
1554 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1555 * that, q-value will be smaller than 0.001, the minimum q-value the
1556 * HTTP specification allows. See
1557 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1558 */
1559 const int MAX_DECIMAL_PLACES = 3;
1560 const int MAX_LANGUAGE_TAGS = 1000;
1561 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1562 char **language_tags = NULL;
1563 int num_langs = 0;
1564 const char *s = get_preferred_languages();
1565 int i;
1566 struct strbuf tag = STRBUF_INIT;
1567
1568 /* Don't add Accept-Language header if no language is preferred. */
1569 if (!s)
1570 return;
1571
1572 /*
1573 * Split the colon-separated string of preferred languages into
1574 * language_tags array.
1575 */
1576 do {
1577 /* collect language tag */
1578 for (; *s && (isalnum(*s) || *s == '_'); s++)
1579 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1580
1581 /* skip .codeset, @modifier and any other unnecessary parts */
1582 while (*s && *s != ':')
1583 s++;
1584
1585 if (tag.len) {
1586 num_langs++;
1587 REALLOC_ARRAY(language_tags, num_langs);
1588 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1589 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1590 break;
1591 }
1592 } while (*s++);
1593
1594 /* write Accept-Language header into buf */
1595 if (num_langs) {
1596 int last_buf_len = 0;
1597 int max_q;
1598 int decimal_places;
1599 char q_format[32];
1600
1601 /* add '*' */
1602 REALLOC_ARRAY(language_tags, num_langs + 1);
1603 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1604
1605 /* compute decimal_places */
1606 for (max_q = 1, decimal_places = 0;
1607 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1608 decimal_places++, max_q *= 10)
1609 ;
1610
1611 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1612
1613 strbuf_addstr(buf, "Accept-Language: ");
1614
1615 for (i = 0; i < num_langs; i++) {
1616 if (i > 0)
1617 strbuf_addstr(buf, ", ");
1618
1619 strbuf_addstr(buf, language_tags[i]);
1620
1621 if (i > 0)
1622 strbuf_addf(buf, q_format, max_q - i);
1623
1624 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1625 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1626 break;
1627 }
1628
1629 last_buf_len = buf->len;
1630 }
1631 }
1632
1633 /* free language tags -- last one is a static '*' */
1634 for (i = 0; i < num_langs - 1; i++)
1635 free(language_tags[i]);
1636 free(language_tags);
1637 }
1638
1639 /*
1640 * Get an Accept-Language header which indicates user's preferred languages.
1641 *
1642 * Examples:
1643 * LANGUAGE= -> ""
1644 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1645 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1646 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1647 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1648 * LANGUAGE= LANG=C -> ""
1649 */
1650 static const char *get_accept_language(void)
1651 {
1652 if (!cached_accept_language) {
1653 struct strbuf buf = STRBUF_INIT;
1654 write_accept_language(&buf);
1655 if (buf.len > 0)
1656 cached_accept_language = strbuf_detach(&buf, NULL);
1657 }
1658
1659 return cached_accept_language;
1660 }
1661
1662 static void http_opt_request_remainder(CURL *curl, off_t pos)
1663 {
1664 char buf[128];
1665 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1666 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1667 }
1668
1669 /* http_request() targets */
1670 #define HTTP_REQUEST_STRBUF 0
1671 #define HTTP_REQUEST_FILE 1
1672
1673 static int http_request(const char *url,
1674 void *result, int target,
1675 const struct http_get_options *options)
1676 {
1677 struct active_request_slot *slot;
1678 struct slot_results results;
1679 struct curl_slist *headers = http_copy_default_headers();
1680 struct strbuf buf = STRBUF_INIT;
1681 const char *accept_language;
1682 int ret;
1683
1684 slot = get_active_slot();
1685 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1686
1687 if (result == NULL) {
1688 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1689 } else {
1690 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1691 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1692
1693 if (target == HTTP_REQUEST_FILE) {
1694 off_t posn = ftello(result);
1695 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1696 fwrite);
1697 if (posn > 0)
1698 http_opt_request_remainder(slot->curl, posn);
1699 } else
1700 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1701 fwrite_buffer);
1702 }
1703
1704 accept_language = get_accept_language();
1705
1706 if (accept_language)
1707 headers = curl_slist_append(headers, accept_language);
1708
1709 strbuf_addstr(&buf, "Pragma:");
1710 if (options && options->no_cache)
1711 strbuf_addstr(&buf, " no-cache");
1712 if (options && options->keep_error)
1713 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1714 if (options && options->initial_request &&
1715 http_follow_config == HTTP_FOLLOW_INITIAL)
1716 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1717
1718 headers = curl_slist_append(headers, buf.buf);
1719
1720 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1721 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1722 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1723
1724 ret = run_one_slot(slot, &results);
1725
1726 if (options && options->content_type) {
1727 struct strbuf raw = STRBUF_INIT;
1728 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1729 extract_content_type(&raw, options->content_type,
1730 options->charset);
1731 strbuf_release(&raw);
1732 }
1733
1734 if (options && options->effective_url)
1735 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1736 options->effective_url);
1737
1738 curl_slist_free_all(headers);
1739 strbuf_release(&buf);
1740
1741 return ret;
1742 }
1743
1744 /*
1745 * Update the "base" url to a more appropriate value, as deduced by
1746 * redirects seen when requesting a URL starting with "url".
1747 *
1748 * The "asked" parameter is a URL that we asked curl to access, and must begin
1749 * with "base".
1750 *
1751 * The "got" parameter is the URL that curl reported to us as where we ended
1752 * up.
1753 *
1754 * Returns 1 if we updated the base url, 0 otherwise.
1755 *
1756 * Our basic strategy is to compare "base" and "asked" to find the bits
1757 * specific to our request. We then strip those bits off of "got" to yield the
1758 * new base. So for example, if our base is "http://example.com/foo.git",
1759 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1760 * with "https://other.example.com/foo.git/info/refs". We would want the
1761 * new URL to become "https://other.example.com/foo.git".
1762 *
1763 * Note that this assumes a sane redirect scheme. It's entirely possible
1764 * in the example above to end up at a URL that does not even end in
1765 * "info/refs". In such a case we die. There's not much we can do, such a
1766 * scheme is unlikely to represent a real git repository, and failing to
1767 * rewrite the base opens options for malicious redirects to do funny things.
1768 */
1769 static int update_url_from_redirect(struct strbuf *base,
1770 const char *asked,
1771 const struct strbuf *got)
1772 {
1773 const char *tail;
1774 size_t new_len;
1775
1776 if (!strcmp(asked, got->buf))
1777 return 0;
1778
1779 if (!skip_prefix(asked, base->buf, &tail))
1780 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1781 asked, base->buf);
1782
1783 new_len = got->len;
1784 if (!strip_suffix_mem(got->buf, &new_len, tail))
1785 die(_("unable to update url base from redirection:\n"
1786 " asked for: %s\n"
1787 " redirect: %s"),
1788 asked, got->buf);
1789
1790 strbuf_reset(base);
1791 strbuf_add(base, got->buf, new_len);
1792
1793 return 1;
1794 }
1795
1796 static int http_request_reauth(const char *url,
1797 void *result, int target,
1798 struct http_get_options *options)
1799 {
1800 int ret = http_request(url, result, target, options);
1801
1802 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1803 return ret;
1804
1805 if (options && options->effective_url && options->base_url) {
1806 if (update_url_from_redirect(options->base_url,
1807 url, options->effective_url)) {
1808 credential_from_url(&http_auth, options->base_url->buf);
1809 url = options->effective_url->buf;
1810 }
1811 }
1812
1813 if (ret != HTTP_REAUTH)
1814 return ret;
1815
1816 /*
1817 * If we are using KEEP_ERROR, the previous request may have
1818 * put cruft into our output stream; we should clear it out before
1819 * making our next request. We only know how to do this for
1820 * the strbuf case, but that is enough to satisfy current callers.
1821 */
1822 if (options && options->keep_error) {
1823 switch (target) {
1824 case HTTP_REQUEST_STRBUF:
1825 strbuf_reset(result);
1826 break;
1827 default:
1828 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1829 }
1830 }
1831
1832 credential_fill(&http_auth);
1833
1834 return http_request(url, result, target, options);
1835 }
1836
1837 int http_get_strbuf(const char *url,
1838 struct strbuf *result,
1839 struct http_get_options *options)
1840 {
1841 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1842 }
1843
1844 /*
1845 * Downloads a URL and stores the result in the given file.
1846 *
1847 * If a previous interrupted download is detected (i.e. a previous temporary
1848 * file is still around) the download is resumed.
1849 */
1850 static int http_get_file(const char *url, const char *filename,
1851 struct http_get_options *options)
1852 {
1853 int ret;
1854 struct strbuf tmpfile = STRBUF_INIT;
1855 FILE *result;
1856
1857 strbuf_addf(&tmpfile, "%s.temp", filename);
1858 result = fopen(tmpfile.buf, "a");
1859 if (!result) {
1860 error("Unable to open local file %s", tmpfile.buf);
1861 ret = HTTP_ERROR;
1862 goto cleanup;
1863 }
1864
1865 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1866 fclose(result);
1867
1868 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1869 ret = HTTP_ERROR;
1870 cleanup:
1871 strbuf_release(&tmpfile);
1872 return ret;
1873 }
1874
1875 int http_fetch_ref(const char *base, struct ref *ref)
1876 {
1877 struct http_get_options options = {0};
1878 char *url;
1879 struct strbuf buffer = STRBUF_INIT;
1880 int ret = -1;
1881
1882 options.no_cache = 1;
1883
1884 url = quote_ref_url(base, ref->name);
1885 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1886 strbuf_rtrim(&buffer);
1887 if (buffer.len == 40)
1888 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1889 else if (starts_with(buffer.buf, "ref: ")) {
1890 ref->symref = xstrdup(buffer.buf + 5);
1891 ret = 0;
1892 }
1893 }
1894
1895 strbuf_release(&buffer);
1896 free(url);
1897 return ret;
1898 }
1899
1900 /* Helpers for fetching packs */
1901 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1902 {
1903 char *url, *tmp;
1904 struct strbuf buf = STRBUF_INIT;
1905
1906 if (http_is_verbose)
1907 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1908
1909 end_url_with_slash(&buf, base_url);
1910 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1911 url = strbuf_detach(&buf, NULL);
1912
1913 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1914 tmp = strbuf_detach(&buf, NULL);
1915
1916 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1917 error("Unable to get pack index %s", url);
1918 FREE_AND_NULL(tmp);
1919 }
1920
1921 free(url);
1922 return tmp;
1923 }
1924
1925 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1926 unsigned char *sha1, const char *base_url)
1927 {
1928 struct packed_git *new_pack;
1929 char *tmp_idx = NULL;
1930 int ret;
1931
1932 if (has_pack_index(sha1)) {
1933 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1934 if (!new_pack)
1935 return -1; /* parse_pack_index() already issued error message */
1936 goto add_pack;
1937 }
1938
1939 tmp_idx = fetch_pack_index(sha1, base_url);
1940 if (!tmp_idx)
1941 return -1;
1942
1943 new_pack = parse_pack_index(sha1, tmp_idx);
1944 if (!new_pack) {
1945 unlink(tmp_idx);
1946 free(tmp_idx);
1947
1948 return -1; /* parse_pack_index() already issued error message */
1949 }
1950
1951 ret = verify_pack_index(new_pack);
1952 if (!ret) {
1953 close_pack_index(new_pack);
1954 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1955 }
1956 free(tmp_idx);
1957 if (ret)
1958 return -1;
1959
1960 add_pack:
1961 new_pack->next = *packs_head;
1962 *packs_head = new_pack;
1963 return 0;
1964 }
1965
1966 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1967 {
1968 struct http_get_options options = {0};
1969 int ret = 0, i = 0;
1970 char *url, *data;
1971 struct strbuf buf = STRBUF_INIT;
1972 unsigned char sha1[20];
1973
1974 end_url_with_slash(&buf, base_url);
1975 strbuf_addstr(&buf, "objects/info/packs");
1976 url = strbuf_detach(&buf, NULL);
1977
1978 options.no_cache = 1;
1979 ret = http_get_strbuf(url, &buf, &options);
1980 if (ret != HTTP_OK)
1981 goto cleanup;
1982
1983 data = buf.buf;
1984 while (i < buf.len) {
1985 switch (data[i]) {
1986 case 'P':
1987 i++;
1988 if (i + 52 <= buf.len &&
1989 starts_with(data + i, " pack-") &&
1990 starts_with(data + i + 46, ".pack\n")) {
1991 get_sha1_hex(data + i + 6, sha1);
1992 fetch_and_setup_pack_index(packs_head, sha1,
1993 base_url);
1994 i += 51;
1995 break;
1996 }
1997 default:
1998 while (i < buf.len && data[i] != '\n')
1999 i++;
2000 }
2001 i++;
2002 }
2003
2004 cleanup:
2005 free(url);
2006 return ret;
2007 }
2008
2009 void release_http_pack_request(struct http_pack_request *preq)
2010 {
2011 if (preq->packfile != NULL) {
2012 fclose(preq->packfile);
2013 preq->packfile = NULL;
2014 }
2015 preq->slot = NULL;
2016 free(preq->url);
2017 free(preq);
2018 }
2019
2020 int finish_http_pack_request(struct http_pack_request *preq)
2021 {
2022 struct packed_git **lst;
2023 struct packed_git *p = preq->target;
2024 char *tmp_idx;
2025 size_t len;
2026 struct child_process ip = CHILD_PROCESS_INIT;
2027 const char *ip_argv[8];
2028
2029 close_pack_index(p);
2030
2031 fclose(preq->packfile);
2032 preq->packfile = NULL;
2033
2034 lst = preq->lst;
2035 while (*lst != p)
2036 lst = &((*lst)->next);
2037 *lst = (*lst)->next;
2038
2039 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2040 die("BUG: pack tmpfile does not end in .pack.temp?");
2041 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2042
2043 ip_argv[0] = "index-pack";
2044 ip_argv[1] = "-o";
2045 ip_argv[2] = tmp_idx;
2046 ip_argv[3] = preq->tmpfile;
2047 ip_argv[4] = NULL;
2048
2049 ip.argv = ip_argv;
2050 ip.git_cmd = 1;
2051 ip.no_stdin = 1;
2052 ip.no_stdout = 1;
2053
2054 if (run_command(&ip)) {
2055 unlink(preq->tmpfile);
2056 unlink(tmp_idx);
2057 free(tmp_idx);
2058 return -1;
2059 }
2060
2061 unlink(sha1_pack_index_name(p->sha1));
2062
2063 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2064 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2065 free(tmp_idx);
2066 return -1;
2067 }
2068
2069 install_packed_git(p);
2070 free(tmp_idx);
2071 return 0;
2072 }
2073
2074 struct http_pack_request *new_http_pack_request(
2075 struct packed_git *target, const char *base_url)
2076 {
2077 off_t prev_posn = 0;
2078 struct strbuf buf = STRBUF_INIT;
2079 struct http_pack_request *preq;
2080
2081 preq = xcalloc(1, sizeof(*preq));
2082 preq->target = target;
2083
2084 end_url_with_slash(&buf, base_url);
2085 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2086 sha1_to_hex(target->sha1));
2087 preq->url = strbuf_detach(&buf, NULL);
2088
2089 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2090 sha1_pack_name(target->sha1));
2091 preq->packfile = fopen(preq->tmpfile, "a");
2092 if (!preq->packfile) {
2093 error("Unable to open local file %s for pack",
2094 preq->tmpfile);
2095 goto abort;
2096 }
2097
2098 preq->slot = get_active_slot();
2099 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2100 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2101 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2102 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2103 no_pragma_header);
2104
2105 /*
2106 * If there is data present from a previous transfer attempt,
2107 * resume where it left off
2108 */
2109 prev_posn = ftello(preq->packfile);
2110 if (prev_posn>0) {
2111 if (http_is_verbose)
2112 fprintf(stderr,
2113 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2114 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2115 http_opt_request_remainder(preq->slot->curl, prev_posn);
2116 }
2117
2118 return preq;
2119
2120 abort:
2121 free(preq->url);
2122 free(preq);
2123 return NULL;
2124 }
2125
2126 /* Helpers for fetching objects (loose) */
2127 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2128 void *data)
2129 {
2130 unsigned char expn[4096];
2131 size_t size = eltsize * nmemb;
2132 int posn = 0;
2133 struct http_object_request *freq = data;
2134 struct active_request_slot *slot = freq->slot;
2135
2136 if (slot) {
2137 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2138 &slot->http_code);
2139 if (c != CURLE_OK)
2140 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2141 curl_easy_strerror(c));
2142 if (slot->http_code >= 300)
2143 return size;
2144 }
2145
2146 do {
2147 ssize_t retval = xwrite(freq->localfile,
2148 (char *) ptr + posn, size - posn);
2149 if (retval < 0)
2150 return posn;
2151 posn += retval;
2152 } while (posn < size);
2153
2154 freq->stream.avail_in = size;
2155 freq->stream.next_in = (void *)ptr;
2156 do {
2157 freq->stream.next_out = expn;
2158 freq->stream.avail_out = sizeof(expn);
2159 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2160 git_SHA1_Update(&freq->c, expn,
2161 sizeof(expn) - freq->stream.avail_out);
2162 } while (freq->stream.avail_in && freq->zret == Z_OK);
2163 return size;
2164 }
2165
2166 struct http_object_request *new_http_object_request(const char *base_url,
2167 unsigned char *sha1)
2168 {
2169 char *hex = sha1_to_hex(sha1);
2170 const char *filename;
2171 char prevfile[PATH_MAX];
2172 int prevlocal;
2173 char prev_buf[PREV_BUF_SIZE];
2174 ssize_t prev_read = 0;
2175 off_t prev_posn = 0;
2176 struct http_object_request *freq;
2177
2178 freq = xcalloc(1, sizeof(*freq));
2179 hashcpy(freq->sha1, sha1);
2180 freq->localfile = -1;
2181
2182 filename = sha1_file_name(sha1);
2183 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2184 "%s.temp", filename);
2185
2186 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2187 unlink_or_warn(prevfile);
2188 rename(freq->tmpfile, prevfile);
2189 unlink_or_warn(freq->tmpfile);
2190
2191 if (freq->localfile != -1)
2192 error("fd leakage in start: %d", freq->localfile);
2193 freq->localfile = open(freq->tmpfile,
2194 O_WRONLY | O_CREAT | O_EXCL, 0666);
2195 /*
2196 * This could have failed due to the "lazy directory creation";
2197 * try to mkdir the last path component.
2198 */
2199 if (freq->localfile < 0 && errno == ENOENT) {
2200 char *dir = strrchr(freq->tmpfile, '/');
2201 if (dir) {
2202 *dir = 0;
2203 mkdir(freq->tmpfile, 0777);
2204 *dir = '/';
2205 }
2206 freq->localfile = open(freq->tmpfile,
2207 O_WRONLY | O_CREAT | O_EXCL, 0666);
2208 }
2209
2210 if (freq->localfile < 0) {
2211 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2212 goto abort;
2213 }
2214
2215 git_inflate_init(&freq->stream);
2216
2217 git_SHA1_Init(&freq->c);
2218
2219 freq->url = get_remote_object_url(base_url, hex, 0);
2220
2221 /*
2222 * If a previous temp file is present, process what was already
2223 * fetched.
2224 */
2225 prevlocal = open(prevfile, O_RDONLY);
2226 if (prevlocal != -1) {
2227 do {
2228 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2229 if (prev_read>0) {
2230 if (fwrite_sha1_file(prev_buf,
2231 1,
2232 prev_read,
2233 freq) == prev_read) {
2234 prev_posn += prev_read;
2235 } else {
2236 prev_read = -1;
2237 }
2238 }
2239 } while (prev_read > 0);
2240 close(prevlocal);
2241 }
2242 unlink_or_warn(prevfile);
2243
2244 /*
2245 * Reset inflate/SHA1 if there was an error reading the previous temp
2246 * file; also rewind to the beginning of the local file.
2247 */
2248 if (prev_read == -1) {
2249 memset(&freq->stream, 0, sizeof(freq->stream));
2250 git_inflate_init(&freq->stream);
2251 git_SHA1_Init(&freq->c);
2252 if (prev_posn>0) {
2253 prev_posn = 0;
2254 lseek(freq->localfile, 0, SEEK_SET);
2255 if (ftruncate(freq->localfile, 0) < 0) {
2256 error_errno("Couldn't truncate temporary file %s",
2257 freq->tmpfile);
2258 goto abort;
2259 }
2260 }
2261 }
2262
2263 freq->slot = get_active_slot();
2264
2265 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2266 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2267 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2268 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2269 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2270 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2271
2272 /*
2273 * If we have successfully processed data from a previous fetch
2274 * attempt, only fetch the data we don't already have.
2275 */
2276 if (prev_posn>0) {
2277 if (http_is_verbose)
2278 fprintf(stderr,
2279 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2280 hex, (uintmax_t)prev_posn);
2281 http_opt_request_remainder(freq->slot->curl, prev_posn);
2282 }
2283
2284 return freq;
2285
2286 abort:
2287 free(freq->url);
2288 free(freq);
2289 return NULL;
2290 }
2291
2292 void process_http_object_request(struct http_object_request *freq)
2293 {
2294 if (freq->slot == NULL)
2295 return;
2296 freq->curl_result = freq->slot->curl_result;
2297 freq->http_code = freq->slot->http_code;
2298 freq->slot = NULL;
2299 }
2300
2301 int finish_http_object_request(struct http_object_request *freq)
2302 {
2303 struct stat st;
2304
2305 close(freq->localfile);
2306 freq->localfile = -1;
2307
2308 process_http_object_request(freq);
2309
2310 if (freq->http_code == 416) {
2311 warning("requested range invalid; we may already have all the data.");
2312 } else if (freq->curl_result != CURLE_OK) {
2313 if (stat(freq->tmpfile, &st) == 0)
2314 if (st.st_size == 0)
2315 unlink_or_warn(freq->tmpfile);
2316 return -1;
2317 }
2318
2319 git_inflate_end(&freq->stream);
2320 git_SHA1_Final(freq->real_sha1, &freq->c);
2321 if (freq->zret != Z_STREAM_END) {
2322 unlink_or_warn(freq->tmpfile);
2323 return -1;
2324 }
2325 if (hashcmp(freq->sha1, freq->real_sha1)) {
2326 unlink_or_warn(freq->tmpfile);
2327 return -1;
2328 }
2329 freq->rename =
2330 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2331
2332 return freq->rename;
2333 }
2334
2335 void abort_http_object_request(struct http_object_request *freq)
2336 {
2337 unlink_or_warn(freq->tmpfile);
2338
2339 release_http_object_request(freq);
2340 }
2341
2342 void release_http_object_request(struct http_object_request *freq)
2343 {
2344 if (freq->localfile != -1) {
2345 close(freq->localfile);
2346 freq->localfile = -1;
2347 }
2348 if (freq->url != NULL) {
2349 FREE_AND_NULL(freq->url);
2350 }
2351 if (freq->slot != NULL) {
2352 freq->slot->callback_func = NULL;
2353 freq->slot->callback_data = NULL;
2354 release_active_slot(freq->slot);
2355 freq->slot = NULL;
2356 }
2357 }
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