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pack: move unpack_object_header()
[git/gitweb.git] / http.c
blob59bf8833af95a25a1968eaa676b1feed6c694813
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
16 static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
17 #if LIBCURL_VERSION_NUM >= 0x070a08
18 long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
19 #else
20 long int git_curl_ipresolve;
21 #endif
22 int active_requests;
23 int http_is_verbose;
24 ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX;
25
26 #if LIBCURL_VERSION_NUM >= 0x070a06
27 #define LIBCURL_CAN_HANDLE_AUTH_ANY
28 #endif
29
30 static int min_curl_sessions = 1;
31 static int curl_session_count;
32 #ifdef USE_CURL_MULTI
33 static int max_requests = -1;
34 static CURLM *curlm;
35 #endif
36 #ifndef NO_CURL_EASY_DUPHANDLE
37 static CURL *curl_default;
38 #endif
39
40 #define PREV_BUF_SIZE 4096
41
42 char curl_errorstr[CURL_ERROR_SIZE];
43
44 static int curl_ssl_verify = -1;
45 static int curl_ssl_try;
46 static const char *ssl_cert;
47 static const char *ssl_cipherlist;
48 static const char *ssl_version;
49 static struct {
50 const char *name;
51 long ssl_version;
52 } sslversions[] = {
53 { "sslv2", CURL_SSLVERSION_SSLv2 },
54 { "sslv3", CURL_SSLVERSION_SSLv3 },
55 { "tlsv1", CURL_SSLVERSION_TLSv1 },
56 #if LIBCURL_VERSION_NUM >= 0x072200
57 { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
58 { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
59 { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
60 #endif
61 };
62 #if LIBCURL_VERSION_NUM >= 0x070903
63 static const char *ssl_key;
64 #endif
65 #if LIBCURL_VERSION_NUM >= 0x070908
66 static const char *ssl_capath;
67 #endif
68 #if LIBCURL_VERSION_NUM >= 0x072c00
69 static const char *ssl_pinnedkey;
70 #endif
71 static const char *ssl_cainfo;
72 static long curl_low_speed_limit = -1;
73 static long curl_low_speed_time = -1;
74 static int curl_ftp_no_epsv;
75 static const char *curl_http_proxy;
76 static const char *curl_no_proxy;
77 static const char *http_proxy_authmethod;
78 static struct {
79 const char *name;
80 long curlauth_param;
81 } proxy_authmethods[] = {
82 { "basic", CURLAUTH_BASIC },
83 { "digest", CURLAUTH_DIGEST },
84 { "negotiate", CURLAUTH_GSSNEGOTIATE },
85 { "ntlm", CURLAUTH_NTLM },
86 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
87 { "anyauth", CURLAUTH_ANY },
88 #endif
89 /*
90 * CURLAUTH_DIGEST_IE has no corresponding command-line option in
91 * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
92 * here, too
93 */
94 };
95 #if LIBCURL_VERSION_NUM >= 0x071600
96 static const char *curl_deleg;
97 static struct {
98 const char *name;
99 long curl_deleg_param;
100 } curl_deleg_levels[] = {
101 { "none", CURLGSSAPI_DELEGATION_NONE },
102 { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG },
103 { "always", CURLGSSAPI_DELEGATION_FLAG },
104 };
105 #endif
106
107 static struct credential proxy_auth = CREDENTIAL_INIT;
108 static const char *curl_proxyuserpwd;
109 static const char *curl_cookie_file;
110 static int curl_save_cookies;
111 struct credential http_auth = CREDENTIAL_INIT;
112 static int http_proactive_auth;
113 static const char *user_agent;
114 static int curl_empty_auth = -1;
115
116 enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL;
117
118 #if LIBCURL_VERSION_NUM >= 0x071700
119 /* Use CURLOPT_KEYPASSWD as is */
120 #elif LIBCURL_VERSION_NUM >= 0x070903
121 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
122 #else
123 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
124 #endif
125
126 static struct credential cert_auth = CREDENTIAL_INIT;
127 static int ssl_cert_password_required;
128 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
129 static unsigned long http_auth_methods = CURLAUTH_ANY;
130 static int http_auth_methods_restricted;
131 /* Modes for which empty_auth cannot actually help us. */
132 static unsigned long empty_auth_useless =
133 CURLAUTH_BASIC
134 #ifdef CURLAUTH_DIGEST_IE
135 | CURLAUTH_DIGEST_IE
136 #endif
137 | CURLAUTH_DIGEST;
138 #endif
139
140 static struct curl_slist *pragma_header;
141 static struct curl_slist *no_pragma_header;
142 static struct curl_slist *extra_http_headers;
143
144 static struct active_request_slot *active_queue_head;
145
146 static char *cached_accept_language;
147
148 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
149 {
150 size_t size = eltsize * nmemb;
151 struct buffer *buffer = buffer_;
152
153 if (size > buffer->buf.len - buffer->posn)
154 size = buffer->buf.len - buffer->posn;
155 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
156 buffer->posn += size;
157
158 return size;
159 }
160
161 #ifndef NO_CURL_IOCTL
162 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
163 {
164 struct buffer *buffer = clientp;
165
166 switch (cmd) {
167 case CURLIOCMD_NOP:
168 return CURLIOE_OK;
169
170 case CURLIOCMD_RESTARTREAD:
171 buffer->posn = 0;
172 return CURLIOE_OK;
173
174 default:
175 return CURLIOE_UNKNOWNCMD;
176 }
177 }
178 #endif
179
180 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
181 {
182 size_t size = eltsize * nmemb;
183 struct strbuf *buffer = buffer_;
184
185 strbuf_add(buffer, ptr, size);
186 return size;
187 }
188
189 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
190 {
191 return eltsize * nmemb;
192 }
193
194 static void closedown_active_slot(struct active_request_slot *slot)
195 {
196 active_requests--;
197 slot->in_use = 0;
198 }
199
200 static void finish_active_slot(struct active_request_slot *slot)
201 {
202 closedown_active_slot(slot);
203 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
204
205 if (slot->finished != NULL)
206 (*slot->finished) = 1;
207
208 /* Store slot results so they can be read after the slot is reused */
209 if (slot->results != NULL) {
210 slot->results->curl_result = slot->curl_result;
211 slot->results->http_code = slot->http_code;
212 #if LIBCURL_VERSION_NUM >= 0x070a08
213 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
214 &slot->results->auth_avail);
215 #else
216 slot->results->auth_avail = 0;
217 #endif
218
219 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
220 &slot->results->http_connectcode);
221 }
222
223 /* Run callback if appropriate */
224 if (slot->callback_func != NULL)
225 slot->callback_func(slot->callback_data);
226 }
227
228 static void xmulti_remove_handle(struct active_request_slot *slot)
229 {
230 #ifdef USE_CURL_MULTI
231 curl_multi_remove_handle(curlm, slot->curl);
232 #endif
233 }
234
235 #ifdef USE_CURL_MULTI
236 static void process_curl_messages(void)
237 {
238 int num_messages;
239 struct active_request_slot *slot;
240 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
241
242 while (curl_message != NULL) {
243 if (curl_message->msg == CURLMSG_DONE) {
244 int curl_result = curl_message->data.result;
245 slot = active_queue_head;
246 while (slot != NULL &&
247 slot->curl != curl_message->easy_handle)
248 slot = slot->next;
249 if (slot != NULL) {
250 xmulti_remove_handle(slot);
251 slot->curl_result = curl_result;
252 finish_active_slot(slot);
253 } else {
254 fprintf(stderr, "Received DONE message for unknown request!\n");
255 }
256 } else {
257 fprintf(stderr, "Unknown CURL message received: %d\n",
258 (int)curl_message->msg);
259 }
260 curl_message = curl_multi_info_read(curlm, &num_messages);
261 }
262 }
263 #endif
264
265 static int http_options(const char *var, const char *value, void *cb)
266 {
267 if (!strcmp("http.sslverify", var)) {
268 curl_ssl_verify = git_config_bool(var, value);
269 return 0;
270 }
271 if (!strcmp("http.sslcipherlist", var))
272 return git_config_string(&ssl_cipherlist, var, value);
273 if (!strcmp("http.sslversion", var))
274 return git_config_string(&ssl_version, var, value);
275 if (!strcmp("http.sslcert", var))
276 return git_config_pathname(&ssl_cert, var, value);
277 #if LIBCURL_VERSION_NUM >= 0x070903
278 if (!strcmp("http.sslkey", var))
279 return git_config_pathname(&ssl_key, var, value);
280 #endif
281 #if LIBCURL_VERSION_NUM >= 0x070908
282 if (!strcmp("http.sslcapath", var))
283 return git_config_pathname(&ssl_capath, var, value);
284 #endif
285 if (!strcmp("http.sslcainfo", var))
286 return git_config_pathname(&ssl_cainfo, var, value);
287 if (!strcmp("http.sslcertpasswordprotected", var)) {
288 ssl_cert_password_required = git_config_bool(var, value);
289 return 0;
290 }
291 if (!strcmp("http.ssltry", var)) {
292 curl_ssl_try = git_config_bool(var, value);
293 return 0;
294 }
295 if (!strcmp("http.minsessions", var)) {
296 min_curl_sessions = git_config_int(var, value);
297 #ifndef USE_CURL_MULTI
298 if (min_curl_sessions > 1)
299 min_curl_sessions = 1;
300 #endif
301 return 0;
302 }
303 #ifdef USE_CURL_MULTI
304 if (!strcmp("http.maxrequests", var)) {
305 max_requests = git_config_int(var, value);
306 return 0;
307 }
308 #endif
309 if (!strcmp("http.lowspeedlimit", var)) {
310 curl_low_speed_limit = (long)git_config_int(var, value);
311 return 0;
312 }
313 if (!strcmp("http.lowspeedtime", var)) {
314 curl_low_speed_time = (long)git_config_int(var, value);
315 return 0;
316 }
317
318 if (!strcmp("http.noepsv", var)) {
319 curl_ftp_no_epsv = git_config_bool(var, value);
320 return 0;
321 }
322 if (!strcmp("http.proxy", var))
323 return git_config_string(&curl_http_proxy, var, value);
324
325 if (!strcmp("http.proxyauthmethod", var))
326 return git_config_string(&http_proxy_authmethod, var, value);
327
328 if (!strcmp("http.cookiefile", var))
329 return git_config_pathname(&curl_cookie_file, var, value);
330 if (!strcmp("http.savecookies", var)) {
331 curl_save_cookies = git_config_bool(var, value);
332 return 0;
333 }
334
335 if (!strcmp("http.postbuffer", var)) {
336 http_post_buffer = git_config_ssize_t(var, value);
337 if (http_post_buffer < 0)
338 warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX);
339 if (http_post_buffer < LARGE_PACKET_MAX)
340 http_post_buffer = LARGE_PACKET_MAX;
341 return 0;
342 }
343
344 if (!strcmp("http.useragent", var))
345 return git_config_string(&user_agent, var, value);
346
347 if (!strcmp("http.emptyauth", var)) {
348 if (value && !strcmp("auto", value))
349 curl_empty_auth = -1;
350 else
351 curl_empty_auth = git_config_bool(var, value);
352 return 0;
353 }
354
355 if (!strcmp("http.delegation", var)) {
356 #if LIBCURL_VERSION_NUM >= 0x071600
357 return git_config_string(&curl_deleg, var, value);
358 #else
359 warning(_("Delegation control is not supported with cURL < 7.22.0"));
360 return 0;
361 #endif
362 }
363
364 if (!strcmp("http.pinnedpubkey", var)) {
365 #if LIBCURL_VERSION_NUM >= 0x072c00
366 return git_config_pathname(&ssl_pinnedkey, var, value);
367 #else
368 warning(_("Public key pinning not supported with cURL < 7.44.0"));
369 return 0;
370 #endif
371 }
372
373 if (!strcmp("http.extraheader", var)) {
374 if (!value) {
375 return config_error_nonbool(var);
376 } else if (!*value) {
377 curl_slist_free_all(extra_http_headers);
378 extra_http_headers = NULL;
379 } else {
380 extra_http_headers =
381 curl_slist_append(extra_http_headers, value);
382 }
383 return 0;
384 }
385
386 if (!strcmp("http.followredirects", var)) {
387 if (value && !strcmp(value, "initial"))
388 http_follow_config = HTTP_FOLLOW_INITIAL;
389 else if (git_config_bool(var, value))
390 http_follow_config = HTTP_FOLLOW_ALWAYS;
391 else
392 http_follow_config = HTTP_FOLLOW_NONE;
393 return 0;
394 }
395
396 /* Fall back on the default ones */
397 return git_default_config(var, value, cb);
398 }
399
400 static int curl_empty_auth_enabled(void)
401 {
402 if (curl_empty_auth >= 0)
403 return curl_empty_auth;
404
405 #ifndef LIBCURL_CAN_HANDLE_AUTH_ANY
406 /*
407 * Our libcurl is too old to do AUTH_ANY in the first place;
408 * just default to turning the feature off.
409 */
410 #else
411 /*
412 * In the automatic case, kick in the empty-auth
413 * hack as long as we would potentially try some
414 * method more exotic than "Basic" or "Digest".
415 *
416 * But only do this when this is our second or
417 * subsequent request, as by then we know what
418 * methods are available.
419 */
420 if (http_auth_methods_restricted &&
421 (http_auth_methods & ~empty_auth_useless))
422 return 1;
423 #endif
424 return 0;
425 }
426
427 static void init_curl_http_auth(CURL *result)
428 {
429 if (!http_auth.username || !*http_auth.username) {
430 if (curl_empty_auth_enabled())
431 curl_easy_setopt(result, CURLOPT_USERPWD, ":");
432 return;
433 }
434
435 credential_fill(&http_auth);
436
437 #if LIBCURL_VERSION_NUM >= 0x071301
438 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
439 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
440 #else
441 {
442 static struct strbuf up = STRBUF_INIT;
443 /*
444 * Note that we assume we only ever have a single set of
445 * credentials in a given program run, so we do not have
446 * to worry about updating this buffer, only setting its
447 * initial value.
448 */
449 if (!up.len)
450 strbuf_addf(&up, "%s:%s",
451 http_auth.username, http_auth.password);
452 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
453 }
454 #endif
455 }
456
457 /* *var must be free-able */
458 static void var_override(const char **var, char *value)
459 {
460 if (value) {
461 free((void *)*var);
462 *var = xstrdup(value);
463 }
464 }
465
466 static void set_proxyauth_name_password(CURL *result)
467 {
468 #if LIBCURL_VERSION_NUM >= 0x071301
469 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
470 proxy_auth.username);
471 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
472 proxy_auth.password);
473 #else
474 struct strbuf s = STRBUF_INIT;
475
476 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
477 strbuf_addch(&s, ':');
478 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
479 curl_proxyuserpwd = strbuf_detach(&s, NULL);
480 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
481 #endif
482 }
483
484 static void init_curl_proxy_auth(CURL *result)
485 {
486 if (proxy_auth.username) {
487 if (!proxy_auth.password)
488 credential_fill(&proxy_auth);
489 set_proxyauth_name_password(result);
490 }
491
492 var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
493
494 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
495 if (http_proxy_authmethod) {
496 int i;
497 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
498 if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
499 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
500 proxy_authmethods[i].curlauth_param);
501 break;
502 }
503 }
504 if (i == ARRAY_SIZE(proxy_authmethods)) {
505 warning("unsupported proxy authentication method %s: using anyauth",
506 http_proxy_authmethod);
507 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
508 }
509 }
510 else
511 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
512 #endif
513 }
514
515 static int has_cert_password(void)
516 {
517 if (ssl_cert == NULL || ssl_cert_password_required != 1)
518 return 0;
519 if (!cert_auth.password) {
520 cert_auth.protocol = xstrdup("cert");
521 cert_auth.username = xstrdup("");
522 cert_auth.path = xstrdup(ssl_cert);
523 credential_fill(&cert_auth);
524 }
525 return 1;
526 }
527
528 #if LIBCURL_VERSION_NUM >= 0x071900
529 static void set_curl_keepalive(CURL *c)
530 {
531 curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
532 }
533
534 #elif LIBCURL_VERSION_NUM >= 0x071000
535 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
536 {
537 int ka = 1;
538 int rc;
539 socklen_t len = (socklen_t)sizeof(ka);
540
541 if (type != CURLSOCKTYPE_IPCXN)
542 return 0;
543
544 rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
545 if (rc < 0)
546 warning_errno("unable to set SO_KEEPALIVE on socket");
547
548 return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
549 }
550
551 static void set_curl_keepalive(CURL *c)
552 {
553 curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
554 }
555
556 #else
557 static void set_curl_keepalive(CURL *c)
558 {
559 /* not supported on older curl versions */
560 }
561 #endif
562
563 static void redact_sensitive_header(struct strbuf *header)
564 {
565 const char *sensitive_header;
566
567 if (skip_prefix(header->buf, "Authorization:", &sensitive_header) ||
568 skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) {
569 /* The first token is the type, which is OK to log */
570 while (isspace(*sensitive_header))
571 sensitive_header++;
572 while (*sensitive_header && !isspace(*sensitive_header))
573 sensitive_header++;
574 /* Everything else is opaque and possibly sensitive */
575 strbuf_setlen(header, sensitive_header - header->buf);
576 strbuf_addstr(header, " <redacted>");
577 }
578 }
579
580 static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header)
581 {
582 struct strbuf out = STRBUF_INIT;
583 struct strbuf **headers, **header;
584
585 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
586 text, (long)size, (long)size);
587 trace_strbuf(&trace_curl, &out);
588 strbuf_reset(&out);
589 strbuf_add(&out, ptr, size);
590 headers = strbuf_split_max(&out, '\n', 0);
591
592 for (header = headers; *header; header++) {
593 if (hide_sensitive_header)
594 redact_sensitive_header(*header);
595 strbuf_insert((*header), 0, text, strlen(text));
596 strbuf_insert((*header), strlen(text), ": ", 2);
597 strbuf_rtrim((*header));
598 strbuf_addch((*header), '\n');
599 trace_strbuf(&trace_curl, (*header));
600 }
601 strbuf_list_free(headers);
602 strbuf_release(&out);
603 }
604
605 static void curl_dump_data(const char *text, unsigned char *ptr, size_t size)
606 {
607 size_t i;
608 struct strbuf out = STRBUF_INIT;
609 unsigned int width = 60;
610
611 strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n",
612 text, (long)size, (long)size);
613 trace_strbuf(&trace_curl, &out);
614
615 for (i = 0; i < size; i += width) {
616 size_t w;
617
618 strbuf_reset(&out);
619 strbuf_addf(&out, "%s: ", text);
620 for (w = 0; (w < width) && (i + w < size); w++) {
621 unsigned char ch = ptr[i + w];
622
623 strbuf_addch(&out,
624 (ch >= 0x20) && (ch < 0x80)
625 ? ch : '.');
626 }
627 strbuf_addch(&out, '\n');
628 trace_strbuf(&trace_curl, &out);
629 }
630 strbuf_release(&out);
631 }
632
633 static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
634 {
635 const char *text;
636 enum { NO_FILTER = 0, DO_FILTER = 1 };
637
638 switch (type) {
639 case CURLINFO_TEXT:
640 trace_printf_key(&trace_curl, "== Info: %s", data);
641 default: /* we ignore unknown types by default */
642 return 0;
643
644 case CURLINFO_HEADER_OUT:
645 text = "=> Send header";
646 curl_dump_header(text, (unsigned char *)data, size, DO_FILTER);
647 break;
648 case CURLINFO_DATA_OUT:
649 text = "=> Send data";
650 curl_dump_data(text, (unsigned char *)data, size);
651 break;
652 case CURLINFO_SSL_DATA_OUT:
653 text = "=> Send SSL data";
654 curl_dump_data(text, (unsigned char *)data, size);
655 break;
656 case CURLINFO_HEADER_IN:
657 text = "<= Recv header";
658 curl_dump_header(text, (unsigned char *)data, size, NO_FILTER);
659 break;
660 case CURLINFO_DATA_IN:
661 text = "<= Recv data";
662 curl_dump_data(text, (unsigned char *)data, size);
663 break;
664 case CURLINFO_SSL_DATA_IN:
665 text = "<= Recv SSL data";
666 curl_dump_data(text, (unsigned char *)data, size);
667 break;
668 }
669 return 0;
670 }
671
672 void setup_curl_trace(CURL *handle)
673 {
674 if (!trace_want(&trace_curl))
675 return;
676 curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
677 curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
678 curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
679 }
680
681 static long get_curl_allowed_protocols(int from_user)
682 {
683 long allowed_protocols = 0;
684
685 if (is_transport_allowed("http", from_user))
686 allowed_protocols |= CURLPROTO_HTTP;
687 if (is_transport_allowed("https", from_user))
688 allowed_protocols |= CURLPROTO_HTTPS;
689 if (is_transport_allowed("ftp", from_user))
690 allowed_protocols |= CURLPROTO_FTP;
691 if (is_transport_allowed("ftps", from_user))
692 allowed_protocols |= CURLPROTO_FTPS;
693
694 return allowed_protocols;
695 }
696
697 static CURL *get_curl_handle(void)
698 {
699 CURL *result = curl_easy_init();
700
701 if (!result)
702 die("curl_easy_init failed");
703
704 if (!curl_ssl_verify) {
705 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
706 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
707 } else {
708 /* Verify authenticity of the peer's certificate */
709 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
710 /* The name in the cert must match whom we tried to connect */
711 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
712 }
713
714 #if LIBCURL_VERSION_NUM >= 0x070907
715 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
716 #endif
717 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
718 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
719 #endif
720
721 #if LIBCURL_VERSION_NUM >= 0x071600
722 if (curl_deleg) {
723 int i;
724 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
725 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
726 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
727 curl_deleg_levels[i].curl_deleg_param);
728 break;
729 }
730 }
731 if (i == ARRAY_SIZE(curl_deleg_levels))
732 warning("Unknown delegation method '%s': using default",
733 curl_deleg);
734 }
735 #endif
736
737 if (http_proactive_auth)
738 init_curl_http_auth(result);
739
740 if (getenv("GIT_SSL_VERSION"))
741 ssl_version = getenv("GIT_SSL_VERSION");
742 if (ssl_version && *ssl_version) {
743 int i;
744 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
745 if (!strcmp(ssl_version, sslversions[i].name)) {
746 curl_easy_setopt(result, CURLOPT_SSLVERSION,
747 sslversions[i].ssl_version);
748 break;
749 }
750 }
751 if (i == ARRAY_SIZE(sslversions))
752 warning("unsupported ssl version %s: using default",
753 ssl_version);
754 }
755
756 if (getenv("GIT_SSL_CIPHER_LIST"))
757 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
758 if (ssl_cipherlist != NULL && *ssl_cipherlist)
759 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
760 ssl_cipherlist);
761
762 if (ssl_cert != NULL)
763 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
764 if (has_cert_password())
765 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
766 #if LIBCURL_VERSION_NUM >= 0x070903
767 if (ssl_key != NULL)
768 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
769 #endif
770 #if LIBCURL_VERSION_NUM >= 0x070908
771 if (ssl_capath != NULL)
772 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
773 #endif
774 #if LIBCURL_VERSION_NUM >= 0x072c00
775 if (ssl_pinnedkey != NULL)
776 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
777 #endif
778 if (ssl_cainfo != NULL)
779 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
780
781 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
782 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
783 curl_low_speed_limit);
784 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
785 curl_low_speed_time);
786 }
787
788 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
789 #if LIBCURL_VERSION_NUM >= 0x071301
790 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
791 #elif LIBCURL_VERSION_NUM >= 0x071101
792 curl_easy_setopt(result, CURLOPT_POST301, 1);
793 #endif
794 #if LIBCURL_VERSION_NUM >= 0x071304
795 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
796 get_curl_allowed_protocols(0));
797 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
798 get_curl_allowed_protocols(-1));
799 #else
800 warning("protocol restrictions not applied to curl redirects because\n"
801 "your curl version is too old (>= 7.19.4)");
802 #endif
803 if (getenv("GIT_CURL_VERBOSE"))
804 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
805 setup_curl_trace(result);
806
807 curl_easy_setopt(result, CURLOPT_USERAGENT,
808 user_agent ? user_agent : git_user_agent());
809
810 if (curl_ftp_no_epsv)
811 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
812
813 #ifdef CURLOPT_USE_SSL
814 if (curl_ssl_try)
815 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
816 #endif
817
818 /*
819 * CURL also examines these variables as a fallback; but we need to query
820 * them here in order to decide whether to prompt for missing password (cf.
821 * init_curl_proxy_auth()).
822 *
823 * Unlike many other common environment variables, these are historically
824 * lowercase only. It appears that CURL did not know this and implemented
825 * only uppercase variants, which was later corrected to take both - with
826 * the exception of http_proxy, which is lowercase only also in CURL. As
827 * the lowercase versions are the historical quasi-standard, they take
828 * precedence here, as in CURL.
829 */
830 if (!curl_http_proxy) {
831 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
832 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
833 var_override(&curl_http_proxy, getenv("https_proxy"));
834 } else {
835 var_override(&curl_http_proxy, getenv("http_proxy"));
836 }
837 if (!curl_http_proxy) {
838 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
839 var_override(&curl_http_proxy, getenv("all_proxy"));
840 }
841 }
842
843 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
844 /*
845 * Handle case with the empty http.proxy value here to keep
846 * common code clean.
847 * NB: empty option disables proxying at all.
848 */
849 curl_easy_setopt(result, CURLOPT_PROXY, "");
850 } else if (curl_http_proxy) {
851 #if LIBCURL_VERSION_NUM >= 0x071800
852 if (starts_with(curl_http_proxy, "socks5h"))
853 curl_easy_setopt(result,
854 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
855 else if (starts_with(curl_http_proxy, "socks5"))
856 curl_easy_setopt(result,
857 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
858 else if (starts_with(curl_http_proxy, "socks4a"))
859 curl_easy_setopt(result,
860 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
861 else if (starts_with(curl_http_proxy, "socks"))
862 curl_easy_setopt(result,
863 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
864 #endif
865 if (strstr(curl_http_proxy, "://"))
866 credential_from_url(&proxy_auth, curl_http_proxy);
867 else {
868 struct strbuf url = STRBUF_INIT;
869 strbuf_addf(&url, "http://%s", curl_http_proxy);
870 credential_from_url(&proxy_auth, url.buf);
871 strbuf_release(&url);
872 }
873
874 if (!proxy_auth.host)
875 die("Invalid proxy URL '%s'", curl_http_proxy);
876
877 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
878 #if LIBCURL_VERSION_NUM >= 0x071304
879 var_override(&curl_no_proxy, getenv("NO_PROXY"));
880 var_override(&curl_no_proxy, getenv("no_proxy"));
881 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
882 #endif
883 }
884 init_curl_proxy_auth(result);
885
886 set_curl_keepalive(result);
887
888 return result;
889 }
890
891 static void set_from_env(const char **var, const char *envname)
892 {
893 const char *val = getenv(envname);
894 if (val)
895 *var = val;
896 }
897
898 void http_init(struct remote *remote, const char *url, int proactive_auth)
899 {
900 char *low_speed_limit;
901 char *low_speed_time;
902 char *normalized_url;
903 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
904
905 config.section = "http";
906 config.key = NULL;
907 config.collect_fn = http_options;
908 config.cascade_fn = git_default_config;
909 config.cb = NULL;
910
911 http_is_verbose = 0;
912 normalized_url = url_normalize(url, &config.url);
913
914 git_config(urlmatch_config_entry, &config);
915 free(normalized_url);
916
917 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
918 die("curl_global_init failed");
919
920 http_proactive_auth = proactive_auth;
921
922 if (remote && remote->http_proxy)
923 curl_http_proxy = xstrdup(remote->http_proxy);
924
925 if (remote)
926 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
927
928 pragma_header = curl_slist_append(http_copy_default_headers(),
929 "Pragma: no-cache");
930 no_pragma_header = curl_slist_append(http_copy_default_headers(),
931 "Pragma:");
932
933 #ifdef USE_CURL_MULTI
934 {
935 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
936 if (http_max_requests != NULL)
937 max_requests = atoi(http_max_requests);
938 }
939
940 curlm = curl_multi_init();
941 if (!curlm)
942 die("curl_multi_init failed");
943 #endif
944
945 if (getenv("GIT_SSL_NO_VERIFY"))
946 curl_ssl_verify = 0;
947
948 set_from_env(&ssl_cert, "GIT_SSL_CERT");
949 #if LIBCURL_VERSION_NUM >= 0x070903
950 set_from_env(&ssl_key, "GIT_SSL_KEY");
951 #endif
952 #if LIBCURL_VERSION_NUM >= 0x070908
953 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
954 #endif
955 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
956
957 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
958
959 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
960 if (low_speed_limit != NULL)
961 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
962 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
963 if (low_speed_time != NULL)
964 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
965
966 if (curl_ssl_verify == -1)
967 curl_ssl_verify = 1;
968
969 curl_session_count = 0;
970 #ifdef USE_CURL_MULTI
971 if (max_requests < 1)
972 max_requests = DEFAULT_MAX_REQUESTS;
973 #endif
974
975 if (getenv("GIT_CURL_FTP_NO_EPSV"))
976 curl_ftp_no_epsv = 1;
977
978 if (url) {
979 credential_from_url(&http_auth, url);
980 if (!ssl_cert_password_required &&
981 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
982 starts_with(url, "https://"))
983 ssl_cert_password_required = 1;
984 }
985
986 #ifndef NO_CURL_EASY_DUPHANDLE
987 curl_default = get_curl_handle();
988 #endif
989 }
990
991 void http_cleanup(void)
992 {
993 struct active_request_slot *slot = active_queue_head;
994
995 while (slot != NULL) {
996 struct active_request_slot *next = slot->next;
997 if (slot->curl != NULL) {
998 xmulti_remove_handle(slot);
999 curl_easy_cleanup(slot->curl);
1000 }
1001 free(slot);
1002 slot = next;
1003 }
1004 active_queue_head = NULL;
1005
1006 #ifndef NO_CURL_EASY_DUPHANDLE
1007 curl_easy_cleanup(curl_default);
1008 #endif
1009
1010 #ifdef USE_CURL_MULTI
1011 curl_multi_cleanup(curlm);
1012 #endif
1013 curl_global_cleanup();
1014
1015 curl_slist_free_all(extra_http_headers);
1016 extra_http_headers = NULL;
1017
1018 curl_slist_free_all(pragma_header);
1019 pragma_header = NULL;
1020
1021 curl_slist_free_all(no_pragma_header);
1022 no_pragma_header = NULL;
1023
1024 if (curl_http_proxy) {
1025 free((void *)curl_http_proxy);
1026 curl_http_proxy = NULL;
1027 }
1028
1029 if (proxy_auth.password) {
1030 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1031 FREE_AND_NULL(proxy_auth.password);
1032 }
1033
1034 free((void *)curl_proxyuserpwd);
1035 curl_proxyuserpwd = NULL;
1036
1037 free((void *)http_proxy_authmethod);
1038 http_proxy_authmethod = NULL;
1039
1040 if (cert_auth.password != NULL) {
1041 memset(cert_auth.password, 0, strlen(cert_auth.password));
1042 FREE_AND_NULL(cert_auth.password);
1043 }
1044 ssl_cert_password_required = 0;
1045
1046 FREE_AND_NULL(cached_accept_language);
1047 }
1048
1049 struct active_request_slot *get_active_slot(void)
1050 {
1051 struct active_request_slot *slot = active_queue_head;
1052 struct active_request_slot *newslot;
1053
1054 #ifdef USE_CURL_MULTI
1055 int num_transfers;
1056
1057 /* Wait for a slot to open up if the queue is full */
1058 while (active_requests >= max_requests) {
1059 curl_multi_perform(curlm, &num_transfers);
1060 if (num_transfers < active_requests)
1061 process_curl_messages();
1062 }
1063 #endif
1064
1065 while (slot != NULL && slot->in_use)
1066 slot = slot->next;
1067
1068 if (slot == NULL) {
1069 newslot = xmalloc(sizeof(*newslot));
1070 newslot->curl = NULL;
1071 newslot->in_use = 0;
1072 newslot->next = NULL;
1073
1074 slot = active_queue_head;
1075 if (slot == NULL) {
1076 active_queue_head = newslot;
1077 } else {
1078 while (slot->next != NULL)
1079 slot = slot->next;
1080 slot->next = newslot;
1081 }
1082 slot = newslot;
1083 }
1084
1085 if (slot->curl == NULL) {
1086 #ifdef NO_CURL_EASY_DUPHANDLE
1087 slot->curl = get_curl_handle();
1088 #else
1089 slot->curl = curl_easy_duphandle(curl_default);
1090 #endif
1091 curl_session_count++;
1092 }
1093
1094 active_requests++;
1095 slot->in_use = 1;
1096 slot->results = NULL;
1097 slot->finished = NULL;
1098 slot->callback_data = NULL;
1099 slot->callback_func = NULL;
1100 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1101 if (curl_save_cookies)
1102 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1103 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1104 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1105 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1106 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1107 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1108 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1109 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1110 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1111 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1112 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1113
1114 /*
1115 * Default following to off unless "ALWAYS" is configured; this gives
1116 * callers a sane starting point, and they can tweak for individual
1117 * HTTP_FOLLOW_* cases themselves.
1118 */
1119 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1120 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1121 else
1122 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1123
1124 #if LIBCURL_VERSION_NUM >= 0x070a08
1125 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1126 #endif
1127 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1128 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1129 #endif
1130 if (http_auth.password || curl_empty_auth_enabled())
1131 init_curl_http_auth(slot->curl);
1132
1133 return slot;
1134 }
1135
1136 int start_active_slot(struct active_request_slot *slot)
1137 {
1138 #ifdef USE_CURL_MULTI
1139 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1140 int num_transfers;
1141
1142 if (curlm_result != CURLM_OK &&
1143 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1144 warning("curl_multi_add_handle failed: %s",
1145 curl_multi_strerror(curlm_result));
1146 active_requests--;
1147 slot->in_use = 0;
1148 return 0;
1149 }
1150
1151 /*
1152 * We know there must be something to do, since we just added
1153 * something.
1154 */
1155 curl_multi_perform(curlm, &num_transfers);
1156 #endif
1157 return 1;
1158 }
1159
1160 #ifdef USE_CURL_MULTI
1161 struct fill_chain {
1162 void *data;
1163 int (*fill)(void *);
1164 struct fill_chain *next;
1165 };
1166
1167 static struct fill_chain *fill_cfg;
1168
1169 void add_fill_function(void *data, int (*fill)(void *))
1170 {
1171 struct fill_chain *new = xmalloc(sizeof(*new));
1172 struct fill_chain **linkp = &fill_cfg;
1173 new->data = data;
1174 new->fill = fill;
1175 new->next = NULL;
1176 while (*linkp)
1177 linkp = &(*linkp)->next;
1178 *linkp = new;
1179 }
1180
1181 void fill_active_slots(void)
1182 {
1183 struct active_request_slot *slot = active_queue_head;
1184
1185 while (active_requests < max_requests) {
1186 struct fill_chain *fill;
1187 for (fill = fill_cfg; fill; fill = fill->next)
1188 if (fill->fill(fill->data))
1189 break;
1190
1191 if (!fill)
1192 break;
1193 }
1194
1195 while (slot != NULL) {
1196 if (!slot->in_use && slot->curl != NULL
1197 && curl_session_count > min_curl_sessions) {
1198 curl_easy_cleanup(slot->curl);
1199 slot->curl = NULL;
1200 curl_session_count--;
1201 }
1202 slot = slot->next;
1203 }
1204 }
1205
1206 void step_active_slots(void)
1207 {
1208 int num_transfers;
1209 CURLMcode curlm_result;
1210
1211 do {
1212 curlm_result = curl_multi_perform(curlm, &num_transfers);
1213 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1214 if (num_transfers < active_requests) {
1215 process_curl_messages();
1216 fill_active_slots();
1217 }
1218 }
1219 #endif
1220
1221 void run_active_slot(struct active_request_slot *slot)
1222 {
1223 #ifdef USE_CURL_MULTI
1224 fd_set readfds;
1225 fd_set writefds;
1226 fd_set excfds;
1227 int max_fd;
1228 struct timeval select_timeout;
1229 int finished = 0;
1230
1231 slot->finished = &finished;
1232 while (!finished) {
1233 step_active_slots();
1234
1235 if (slot->in_use) {
1236 #if LIBCURL_VERSION_NUM >= 0x070f04
1237 long curl_timeout;
1238 curl_multi_timeout(curlm, &curl_timeout);
1239 if (curl_timeout == 0) {
1240 continue;
1241 } else if (curl_timeout == -1) {
1242 select_timeout.tv_sec = 0;
1243 select_timeout.tv_usec = 50000;
1244 } else {
1245 select_timeout.tv_sec = curl_timeout / 1000;
1246 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1247 }
1248 #else
1249 select_timeout.tv_sec = 0;
1250 select_timeout.tv_usec = 50000;
1251 #endif
1252
1253 max_fd = -1;
1254 FD_ZERO(&readfds);
1255 FD_ZERO(&writefds);
1256 FD_ZERO(&excfds);
1257 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1258
1259 /*
1260 * It can happen that curl_multi_timeout returns a pathologically
1261 * long timeout when curl_multi_fdset returns no file descriptors
1262 * to read. See commit message for more details.
1263 */
1264 if (max_fd < 0 &&
1265 (select_timeout.tv_sec > 0 ||
1266 select_timeout.tv_usec > 50000)) {
1267 select_timeout.tv_sec = 0;
1268 select_timeout.tv_usec = 50000;
1269 }
1270
1271 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1272 }
1273 }
1274 #else
1275 while (slot->in_use) {
1276 slot->curl_result = curl_easy_perform(slot->curl);
1277 finish_active_slot(slot);
1278 }
1279 #endif
1280 }
1281
1282 static void release_active_slot(struct active_request_slot *slot)
1283 {
1284 closedown_active_slot(slot);
1285 if (slot->curl) {
1286 xmulti_remove_handle(slot);
1287 if (curl_session_count > min_curl_sessions) {
1288 curl_easy_cleanup(slot->curl);
1289 slot->curl = NULL;
1290 curl_session_count--;
1291 }
1292 }
1293 #ifdef USE_CURL_MULTI
1294 fill_active_slots();
1295 #endif
1296 }
1297
1298 void finish_all_active_slots(void)
1299 {
1300 struct active_request_slot *slot = active_queue_head;
1301
1302 while (slot != NULL)
1303 if (slot->in_use) {
1304 run_active_slot(slot);
1305 slot = active_queue_head;
1306 } else {
1307 slot = slot->next;
1308 }
1309 }
1310
1311 /* Helpers for modifying and creating URLs */
1312 static inline int needs_quote(int ch)
1313 {
1314 if (((ch >= 'A') && (ch <= 'Z'))
1315 || ((ch >= 'a') && (ch <= 'z'))
1316 || ((ch >= '0') && (ch <= '9'))
1317 || (ch == '/')
1318 || (ch == '-')
1319 || (ch == '.'))
1320 return 0;
1321 return 1;
1322 }
1323
1324 static char *quote_ref_url(const char *base, const char *ref)
1325 {
1326 struct strbuf buf = STRBUF_INIT;
1327 const char *cp;
1328 int ch;
1329
1330 end_url_with_slash(&buf, base);
1331
1332 for (cp = ref; (ch = *cp) != 0; cp++)
1333 if (needs_quote(ch))
1334 strbuf_addf(&buf, "%%%02x", ch);
1335 else
1336 strbuf_addch(&buf, *cp);
1337
1338 return strbuf_detach(&buf, NULL);
1339 }
1340
1341 void append_remote_object_url(struct strbuf *buf, const char *url,
1342 const char *hex,
1343 int only_two_digit_prefix)
1344 {
1345 end_url_with_slash(buf, url);
1346
1347 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1348 if (!only_two_digit_prefix)
1349 strbuf_addstr(buf, hex + 2);
1350 }
1351
1352 char *get_remote_object_url(const char *url, const char *hex,
1353 int only_two_digit_prefix)
1354 {
1355 struct strbuf buf = STRBUF_INIT;
1356 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1357 return strbuf_detach(&buf, NULL);
1358 }
1359
1360 static int handle_curl_result(struct slot_results *results)
1361 {
1362 /*
1363 * If we see a failing http code with CURLE_OK, we have turned off
1364 * FAILONERROR (to keep the server's custom error response), and should
1365 * translate the code into failure here.
1366 *
1367 * Likewise, if we see a redirect (30x code), that means we turned off
1368 * redirect-following, and we should treat the result as an error.
1369 */
1370 if (results->curl_result == CURLE_OK &&
1371 results->http_code >= 300) {
1372 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1373 /*
1374 * Normally curl will already have put the "reason phrase"
1375 * from the server into curl_errorstr; unfortunately without
1376 * FAILONERROR it is lost, so we can give only the numeric
1377 * status code.
1378 */
1379 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1380 "The requested URL returned error: %ld",
1381 results->http_code);
1382 }
1383
1384 if (results->curl_result == CURLE_OK) {
1385 credential_approve(&http_auth);
1386 if (proxy_auth.password)
1387 credential_approve(&proxy_auth);
1388 return HTTP_OK;
1389 } else if (missing_target(results))
1390 return HTTP_MISSING_TARGET;
1391 else if (results->http_code == 401) {
1392 if (http_auth.username && http_auth.password) {
1393 credential_reject(&http_auth);
1394 return HTTP_NOAUTH;
1395 } else {
1396 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1397 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1398 if (results->auth_avail) {
1399 http_auth_methods &= results->auth_avail;
1400 http_auth_methods_restricted = 1;
1401 }
1402 #endif
1403 return HTTP_REAUTH;
1404 }
1405 } else {
1406 if (results->http_connectcode == 407)
1407 credential_reject(&proxy_auth);
1408 #if LIBCURL_VERSION_NUM >= 0x070c00
1409 if (!curl_errorstr[0])
1410 strlcpy(curl_errorstr,
1411 curl_easy_strerror(results->curl_result),
1412 sizeof(curl_errorstr));
1413 #endif
1414 return HTTP_ERROR;
1415 }
1416 }
1417
1418 int run_one_slot(struct active_request_slot *slot,
1419 struct slot_results *results)
1420 {
1421 slot->results = results;
1422 if (!start_active_slot(slot)) {
1423 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1424 "failed to start HTTP request");
1425 return HTTP_START_FAILED;
1426 }
1427
1428 run_active_slot(slot);
1429 return handle_curl_result(results);
1430 }
1431
1432 struct curl_slist *http_copy_default_headers(void)
1433 {
1434 struct curl_slist *headers = NULL, *h;
1435
1436 for (h = extra_http_headers; h; h = h->next)
1437 headers = curl_slist_append(headers, h->data);
1438
1439 return headers;
1440 }
1441
1442 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1443 {
1444 char *ptr;
1445 CURLcode ret;
1446
1447 strbuf_reset(buf);
1448 ret = curl_easy_getinfo(curl, info, &ptr);
1449 if (!ret && ptr)
1450 strbuf_addstr(buf, ptr);
1451 return ret;
1452 }
1453
1454 /*
1455 * Check for and extract a content-type parameter. "raw"
1456 * should be positioned at the start of the potential
1457 * parameter, with any whitespace already removed.
1458 *
1459 * "name" is the name of the parameter. The value is appended
1460 * to "out".
1461 */
1462 static int extract_param(const char *raw, const char *name,
1463 struct strbuf *out)
1464 {
1465 size_t len = strlen(name);
1466
1467 if (strncasecmp(raw, name, len))
1468 return -1;
1469 raw += len;
1470
1471 if (*raw != '=')
1472 return -1;
1473 raw++;
1474
1475 while (*raw && !isspace(*raw) && *raw != ';')
1476 strbuf_addch(out, *raw++);
1477 return 0;
1478 }
1479
1480 /*
1481 * Extract a normalized version of the content type, with any
1482 * spaces suppressed, all letters lowercased, and no trailing ";"
1483 * or parameters.
1484 *
1485 * Note that we will silently remove even invalid whitespace. For
1486 * example, "text / plain" is specifically forbidden by RFC 2616,
1487 * but "text/plain" is the only reasonable output, and this keeps
1488 * our code simple.
1489 *
1490 * If the "charset" argument is not NULL, store the value of any
1491 * charset parameter there.
1492 *
1493 * Example:
1494 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1495 * "text / plain" -> "text/plain"
1496 */
1497 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1498 struct strbuf *charset)
1499 {
1500 const char *p;
1501
1502 strbuf_reset(type);
1503 strbuf_grow(type, raw->len);
1504 for (p = raw->buf; *p; p++) {
1505 if (isspace(*p))
1506 continue;
1507 if (*p == ';') {
1508 p++;
1509 break;
1510 }
1511 strbuf_addch(type, tolower(*p));
1512 }
1513
1514 if (!charset)
1515 return;
1516
1517 strbuf_reset(charset);
1518 while (*p) {
1519 while (isspace(*p) || *p == ';')
1520 p++;
1521 if (!extract_param(p, "charset", charset))
1522 return;
1523 while (*p && !isspace(*p))
1524 p++;
1525 }
1526
1527 if (!charset->len && starts_with(type->buf, "text/"))
1528 strbuf_addstr(charset, "ISO-8859-1");
1529 }
1530
1531 static void write_accept_language(struct strbuf *buf)
1532 {
1533 /*
1534 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1535 * that, q-value will be smaller than 0.001, the minimum q-value the
1536 * HTTP specification allows. See
1537 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1538 */
1539 const int MAX_DECIMAL_PLACES = 3;
1540 const int MAX_LANGUAGE_TAGS = 1000;
1541 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1542 char **language_tags = NULL;
1543 int num_langs = 0;
1544 const char *s = get_preferred_languages();
1545 int i;
1546 struct strbuf tag = STRBUF_INIT;
1547
1548 /* Don't add Accept-Language header if no language is preferred. */
1549 if (!s)
1550 return;
1551
1552 /*
1553 * Split the colon-separated string of preferred languages into
1554 * language_tags array.
1555 */
1556 do {
1557 /* collect language tag */
1558 for (; *s && (isalnum(*s) || *s == '_'); s++)
1559 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1560
1561 /* skip .codeset, @modifier and any other unnecessary parts */
1562 while (*s && *s != ':')
1563 s++;
1564
1565 if (tag.len) {
1566 num_langs++;
1567 REALLOC_ARRAY(language_tags, num_langs);
1568 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1569 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1570 break;
1571 }
1572 } while (*s++);
1573
1574 /* write Accept-Language header into buf */
1575 if (num_langs) {
1576 int last_buf_len = 0;
1577 int max_q;
1578 int decimal_places;
1579 char q_format[32];
1580
1581 /* add '*' */
1582 REALLOC_ARRAY(language_tags, num_langs + 1);
1583 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1584
1585 /* compute decimal_places */
1586 for (max_q = 1, decimal_places = 0;
1587 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1588 decimal_places++, max_q *= 10)
1589 ;
1590
1591 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1592
1593 strbuf_addstr(buf, "Accept-Language: ");
1594
1595 for (i = 0; i < num_langs; i++) {
1596 if (i > 0)
1597 strbuf_addstr(buf, ", ");
1598
1599 strbuf_addstr(buf, language_tags[i]);
1600
1601 if (i > 0)
1602 strbuf_addf(buf, q_format, max_q - i);
1603
1604 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1605 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1606 break;
1607 }
1608
1609 last_buf_len = buf->len;
1610 }
1611 }
1612
1613 /* free language tags -- last one is a static '*' */
1614 for (i = 0; i < num_langs - 1; i++)
1615 free(language_tags[i]);
1616 free(language_tags);
1617 }
1618
1619 /*
1620 * Get an Accept-Language header which indicates user's preferred languages.
1621 *
1622 * Examples:
1623 * LANGUAGE= -> ""
1624 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1625 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1626 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1627 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1628 * LANGUAGE= LANG=C -> ""
1629 */
1630 static const char *get_accept_language(void)
1631 {
1632 if (!cached_accept_language) {
1633 struct strbuf buf = STRBUF_INIT;
1634 write_accept_language(&buf);
1635 if (buf.len > 0)
1636 cached_accept_language = strbuf_detach(&buf, NULL);
1637 }
1638
1639 return cached_accept_language;
1640 }
1641
1642 static void http_opt_request_remainder(CURL *curl, off_t pos)
1643 {
1644 char buf[128];
1645 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1646 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1647 }
1648
1649 /* http_request() targets */
1650 #define HTTP_REQUEST_STRBUF 0
1651 #define HTTP_REQUEST_FILE 1
1652
1653 static int http_request(const char *url,
1654 void *result, int target,
1655 const struct http_get_options *options)
1656 {
1657 struct active_request_slot *slot;
1658 struct slot_results results;
1659 struct curl_slist *headers = http_copy_default_headers();
1660 struct strbuf buf = STRBUF_INIT;
1661 const char *accept_language;
1662 int ret;
1663
1664 slot = get_active_slot();
1665 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1666
1667 if (result == NULL) {
1668 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1669 } else {
1670 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1671 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1672
1673 if (target == HTTP_REQUEST_FILE) {
1674 off_t posn = ftello(result);
1675 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1676 fwrite);
1677 if (posn > 0)
1678 http_opt_request_remainder(slot->curl, posn);
1679 } else
1680 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1681 fwrite_buffer);
1682 }
1683
1684 accept_language = get_accept_language();
1685
1686 if (accept_language)
1687 headers = curl_slist_append(headers, accept_language);
1688
1689 strbuf_addstr(&buf, "Pragma:");
1690 if (options && options->no_cache)
1691 strbuf_addstr(&buf, " no-cache");
1692 if (options && options->keep_error)
1693 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1694 if (options && options->initial_request &&
1695 http_follow_config == HTTP_FOLLOW_INITIAL)
1696 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1697
1698 headers = curl_slist_append(headers, buf.buf);
1699
1700 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1701 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1702 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1703
1704 ret = run_one_slot(slot, &results);
1705
1706 if (options && options->content_type) {
1707 struct strbuf raw = STRBUF_INIT;
1708 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1709 extract_content_type(&raw, options->content_type,
1710 options->charset);
1711 strbuf_release(&raw);
1712 }
1713
1714 if (options && options->effective_url)
1715 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1716 options->effective_url);
1717
1718 curl_slist_free_all(headers);
1719 strbuf_release(&buf);
1720
1721 return ret;
1722 }
1723
1724 /*
1725 * Update the "base" url to a more appropriate value, as deduced by
1726 * redirects seen when requesting a URL starting with "url".
1727 *
1728 * The "asked" parameter is a URL that we asked curl to access, and must begin
1729 * with "base".
1730 *
1731 * The "got" parameter is the URL that curl reported to us as where we ended
1732 * up.
1733 *
1734 * Returns 1 if we updated the base url, 0 otherwise.
1735 *
1736 * Our basic strategy is to compare "base" and "asked" to find the bits
1737 * specific to our request. We then strip those bits off of "got" to yield the
1738 * new base. So for example, if our base is "http://example.com/foo.git",
1739 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1740 * with "https://other.example.com/foo.git/info/refs". We would want the
1741 * new URL to become "https://other.example.com/foo.git".
1742 *
1743 * Note that this assumes a sane redirect scheme. It's entirely possible
1744 * in the example above to end up at a URL that does not even end in
1745 * "info/refs". In such a case we die. There's not much we can do, such a
1746 * scheme is unlikely to represent a real git repository, and failing to
1747 * rewrite the base opens options for malicious redirects to do funny things.
1748 */
1749 static int update_url_from_redirect(struct strbuf *base,
1750 const char *asked,
1751 const struct strbuf *got)
1752 {
1753 const char *tail;
1754 size_t new_len;
1755
1756 if (!strcmp(asked, got->buf))
1757 return 0;
1758
1759 if (!skip_prefix(asked, base->buf, &tail))
1760 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1761 asked, base->buf);
1762
1763 new_len = got->len;
1764 if (!strip_suffix_mem(got->buf, &new_len, tail))
1765 die(_("unable to update url base from redirection:\n"
1766 " asked for: %s\n"
1767 " redirect: %s"),
1768 asked, got->buf);
1769
1770 strbuf_reset(base);
1771 strbuf_add(base, got->buf, new_len);
1772
1773 return 1;
1774 }
1775
1776 static int http_request_reauth(const char *url,
1777 void *result, int target,
1778 struct http_get_options *options)
1779 {
1780 int ret = http_request(url, result, target, options);
1781
1782 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1783 return ret;
1784
1785 if (options && options->effective_url && options->base_url) {
1786 if (update_url_from_redirect(options->base_url,
1787 url, options->effective_url)) {
1788 credential_from_url(&http_auth, options->base_url->buf);
1789 url = options->effective_url->buf;
1790 }
1791 }
1792
1793 if (ret != HTTP_REAUTH)
1794 return ret;
1795
1796 /*
1797 * If we are using KEEP_ERROR, the previous request may have
1798 * put cruft into our output stream; we should clear it out before
1799 * making our next request. We only know how to do this for
1800 * the strbuf case, but that is enough to satisfy current callers.
1801 */
1802 if (options && options->keep_error) {
1803 switch (target) {
1804 case HTTP_REQUEST_STRBUF:
1805 strbuf_reset(result);
1806 break;
1807 default:
1808 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1809 }
1810 }
1811
1812 credential_fill(&http_auth);
1813
1814 return http_request(url, result, target, options);
1815 }
1816
1817 int http_get_strbuf(const char *url,
1818 struct strbuf *result,
1819 struct http_get_options *options)
1820 {
1821 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1822 }
1823
1824 /*
1825 * Downloads a URL and stores the result in the given file.
1826 *
1827 * If a previous interrupted download is detected (i.e. a previous temporary
1828 * file is still around) the download is resumed.
1829 */
1830 static int http_get_file(const char *url, const char *filename,
1831 struct http_get_options *options)
1832 {
1833 int ret;
1834 struct strbuf tmpfile = STRBUF_INIT;
1835 FILE *result;
1836
1837 strbuf_addf(&tmpfile, "%s.temp", filename);
1838 result = fopen(tmpfile.buf, "a");
1839 if (!result) {
1840 error("Unable to open local file %s", tmpfile.buf);
1841 ret = HTTP_ERROR;
1842 goto cleanup;
1843 }
1844
1845 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1846 fclose(result);
1847
1848 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1849 ret = HTTP_ERROR;
1850 cleanup:
1851 strbuf_release(&tmpfile);
1852 return ret;
1853 }
1854
1855 int http_fetch_ref(const char *base, struct ref *ref)
1856 {
1857 struct http_get_options options = {0};
1858 char *url;
1859 struct strbuf buffer = STRBUF_INIT;
1860 int ret = -1;
1861
1862 options.no_cache = 1;
1863
1864 url = quote_ref_url(base, ref->name);
1865 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1866 strbuf_rtrim(&buffer);
1867 if (buffer.len == 40)
1868 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1869 else if (starts_with(buffer.buf, "ref: ")) {
1870 ref->symref = xstrdup(buffer.buf + 5);
1871 ret = 0;
1872 }
1873 }
1874
1875 strbuf_release(&buffer);
1876 free(url);
1877 return ret;
1878 }
1879
1880 /* Helpers for fetching packs */
1881 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1882 {
1883 char *url, *tmp;
1884 struct strbuf buf = STRBUF_INIT;
1885
1886 if (http_is_verbose)
1887 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1888
1889 end_url_with_slash(&buf, base_url);
1890 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1891 url = strbuf_detach(&buf, NULL);
1892
1893 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1894 tmp = strbuf_detach(&buf, NULL);
1895
1896 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1897 error("Unable to get pack index %s", url);
1898 FREE_AND_NULL(tmp);
1899 }
1900
1901 free(url);
1902 return tmp;
1903 }
1904
1905 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1906 unsigned char *sha1, const char *base_url)
1907 {
1908 struct packed_git *new_pack;
1909 char *tmp_idx = NULL;
1910 int ret;
1911
1912 if (has_pack_index(sha1)) {
1913 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1914 if (!new_pack)
1915 return -1; /* parse_pack_index() already issued error message */
1916 goto add_pack;
1917 }
1918
1919 tmp_idx = fetch_pack_index(sha1, base_url);
1920 if (!tmp_idx)
1921 return -1;
1922
1923 new_pack = parse_pack_index(sha1, tmp_idx);
1924 if (!new_pack) {
1925 unlink(tmp_idx);
1926 free(tmp_idx);
1927
1928 return -1; /* parse_pack_index() already issued error message */
1929 }
1930
1931 ret = verify_pack_index(new_pack);
1932 if (!ret) {
1933 close_pack_index(new_pack);
1934 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1935 }
1936 free(tmp_idx);
1937 if (ret)
1938 return -1;
1939
1940 add_pack:
1941 new_pack->next = *packs_head;
1942 *packs_head = new_pack;
1943 return 0;
1944 }
1945
1946 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1947 {
1948 struct http_get_options options = {0};
1949 int ret = 0, i = 0;
1950 char *url, *data;
1951 struct strbuf buf = STRBUF_INIT;
1952 unsigned char sha1[20];
1953
1954 end_url_with_slash(&buf, base_url);
1955 strbuf_addstr(&buf, "objects/info/packs");
1956 url = strbuf_detach(&buf, NULL);
1957
1958 options.no_cache = 1;
1959 ret = http_get_strbuf(url, &buf, &options);
1960 if (ret != HTTP_OK)
1961 goto cleanup;
1962
1963 data = buf.buf;
1964 while (i < buf.len) {
1965 switch (data[i]) {
1966 case 'P':
1967 i++;
1968 if (i + 52 <= buf.len &&
1969 starts_with(data + i, " pack-") &&
1970 starts_with(data + i + 46, ".pack\n")) {
1971 get_sha1_hex(data + i + 6, sha1);
1972 fetch_and_setup_pack_index(packs_head, sha1,
1973 base_url);
1974 i += 51;
1975 break;
1976 }
1977 default:
1978 while (i < buf.len && data[i] != '\n')
1979 i++;
1980 }
1981 i++;
1982 }
1983
1984 cleanup:
1985 free(url);
1986 return ret;
1987 }
1988
1989 void release_http_pack_request(struct http_pack_request *preq)
1990 {
1991 if (preq->packfile != NULL) {
1992 fclose(preq->packfile);
1993 preq->packfile = NULL;
1994 }
1995 preq->slot = NULL;
1996 free(preq->url);
1997 free(preq);
1998 }
1999
2000 int finish_http_pack_request(struct http_pack_request *preq)
2001 {
2002 struct packed_git **lst;
2003 struct packed_git *p = preq->target;
2004 char *tmp_idx;
2005 size_t len;
2006 struct child_process ip = CHILD_PROCESS_INIT;
2007 const char *ip_argv[8];
2008
2009 close_pack_index(p);
2010
2011 fclose(preq->packfile);
2012 preq->packfile = NULL;
2013
2014 lst = preq->lst;
2015 while (*lst != p)
2016 lst = &((*lst)->next);
2017 *lst = (*lst)->next;
2018
2019 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2020 die("BUG: pack tmpfile does not end in .pack.temp?");
2021 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2022
2023 ip_argv[0] = "index-pack";
2024 ip_argv[1] = "-o";
2025 ip_argv[2] = tmp_idx;
2026 ip_argv[3] = preq->tmpfile;
2027 ip_argv[4] = NULL;
2028
2029 ip.argv = ip_argv;
2030 ip.git_cmd = 1;
2031 ip.no_stdin = 1;
2032 ip.no_stdout = 1;
2033
2034 if (run_command(&ip)) {
2035 unlink(preq->tmpfile);
2036 unlink(tmp_idx);
2037 free(tmp_idx);
2038 return -1;
2039 }
2040
2041 unlink(sha1_pack_index_name(p->sha1));
2042
2043 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2044 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2045 free(tmp_idx);
2046 return -1;
2047 }
2048
2049 install_packed_git(p);
2050 free(tmp_idx);
2051 return 0;
2052 }
2053
2054 struct http_pack_request *new_http_pack_request(
2055 struct packed_git *target, const char *base_url)
2056 {
2057 off_t prev_posn = 0;
2058 struct strbuf buf = STRBUF_INIT;
2059 struct http_pack_request *preq;
2060
2061 preq = xcalloc(1, sizeof(*preq));
2062 preq->target = target;
2063
2064 end_url_with_slash(&buf, base_url);
2065 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2066 sha1_to_hex(target->sha1));
2067 preq->url = strbuf_detach(&buf, NULL);
2068
2069 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2070 sha1_pack_name(target->sha1));
2071 preq->packfile = fopen(preq->tmpfile, "a");
2072 if (!preq->packfile) {
2073 error("Unable to open local file %s for pack",
2074 preq->tmpfile);
2075 goto abort;
2076 }
2077
2078 preq->slot = get_active_slot();
2079 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2080 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2081 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2082 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2083 no_pragma_header);
2084
2085 /*
2086 * If there is data present from a previous transfer attempt,
2087 * resume where it left off
2088 */
2089 prev_posn = ftello(preq->packfile);
2090 if (prev_posn>0) {
2091 if (http_is_verbose)
2092 fprintf(stderr,
2093 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2094 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2095 http_opt_request_remainder(preq->slot->curl, prev_posn);
2096 }
2097
2098 return preq;
2099
2100 abort:
2101 free(preq->url);
2102 free(preq);
2103 return NULL;
2104 }
2105
2106 /* Helpers for fetching objects (loose) */
2107 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2108 void *data)
2109 {
2110 unsigned char expn[4096];
2111 size_t size = eltsize * nmemb;
2112 int posn = 0;
2113 struct http_object_request *freq = data;
2114 struct active_request_slot *slot = freq->slot;
2115
2116 if (slot) {
2117 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2118 &slot->http_code);
2119 if (c != CURLE_OK)
2120 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2121 curl_easy_strerror(c));
2122 if (slot->http_code >= 300)
2123 return size;
2124 }
2125
2126 do {
2127 ssize_t retval = xwrite(freq->localfile,
2128 (char *) ptr + posn, size - posn);
2129 if (retval < 0)
2130 return posn;
2131 posn += retval;
2132 } while (posn < size);
2133
2134 freq->stream.avail_in = size;
2135 freq->stream.next_in = (void *)ptr;
2136 do {
2137 freq->stream.next_out = expn;
2138 freq->stream.avail_out = sizeof(expn);
2139 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2140 git_SHA1_Update(&freq->c, expn,
2141 sizeof(expn) - freq->stream.avail_out);
2142 } while (freq->stream.avail_in && freq->zret == Z_OK);
2143 return size;
2144 }
2145
2146 struct http_object_request *new_http_object_request(const char *base_url,
2147 unsigned char *sha1)
2148 {
2149 char *hex = sha1_to_hex(sha1);
2150 const char *filename;
2151 char prevfile[PATH_MAX];
2152 int prevlocal;
2153 char prev_buf[PREV_BUF_SIZE];
2154 ssize_t prev_read = 0;
2155 off_t prev_posn = 0;
2156 struct http_object_request *freq;
2157
2158 freq = xcalloc(1, sizeof(*freq));
2159 hashcpy(freq->sha1, sha1);
2160 freq->localfile = -1;
2161
2162 filename = sha1_file_name(sha1);
2163 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2164 "%s.temp", filename);
2165
2166 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2167 unlink_or_warn(prevfile);
2168 rename(freq->tmpfile, prevfile);
2169 unlink_or_warn(freq->tmpfile);
2170
2171 if (freq->localfile != -1)
2172 error("fd leakage in start: %d", freq->localfile);
2173 freq->localfile = open(freq->tmpfile,
2174 O_WRONLY | O_CREAT | O_EXCL, 0666);
2175 /*
2176 * This could have failed due to the "lazy directory creation";
2177 * try to mkdir the last path component.
2178 */
2179 if (freq->localfile < 0 && errno == ENOENT) {
2180 char *dir = strrchr(freq->tmpfile, '/');
2181 if (dir) {
2182 *dir = 0;
2183 mkdir(freq->tmpfile, 0777);
2184 *dir = '/';
2185 }
2186 freq->localfile = open(freq->tmpfile,
2187 O_WRONLY | O_CREAT | O_EXCL, 0666);
2188 }
2189
2190 if (freq->localfile < 0) {
2191 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2192 goto abort;
2193 }
2194
2195 git_inflate_init(&freq->stream);
2196
2197 git_SHA1_Init(&freq->c);
2198
2199 freq->url = get_remote_object_url(base_url, hex, 0);
2200
2201 /*
2202 * If a previous temp file is present, process what was already
2203 * fetched.
2204 */
2205 prevlocal = open(prevfile, O_RDONLY);
2206 if (prevlocal != -1) {
2207 do {
2208 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2209 if (prev_read>0) {
2210 if (fwrite_sha1_file(prev_buf,
2211 1,
2212 prev_read,
2213 freq) == prev_read) {
2214 prev_posn += prev_read;
2215 } else {
2216 prev_read = -1;
2217 }
2218 }
2219 } while (prev_read > 0);
2220 close(prevlocal);
2221 }
2222 unlink_or_warn(prevfile);
2223
2224 /*
2225 * Reset inflate/SHA1 if there was an error reading the previous temp
2226 * file; also rewind to the beginning of the local file.
2227 */
2228 if (prev_read == -1) {
2229 memset(&freq->stream, 0, sizeof(freq->stream));
2230 git_inflate_init(&freq->stream);
2231 git_SHA1_Init(&freq->c);
2232 if (prev_posn>0) {
2233 prev_posn = 0;
2234 lseek(freq->localfile, 0, SEEK_SET);
2235 if (ftruncate(freq->localfile, 0) < 0) {
2236 error_errno("Couldn't truncate temporary file %s",
2237 freq->tmpfile);
2238 goto abort;
2239 }
2240 }
2241 }
2242
2243 freq->slot = get_active_slot();
2244
2245 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2246 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2247 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2248 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2249 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2250 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2251
2252 /*
2253 * If we have successfully processed data from a previous fetch
2254 * attempt, only fetch the data we don't already have.
2255 */
2256 if (prev_posn>0) {
2257 if (http_is_verbose)
2258 fprintf(stderr,
2259 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2260 hex, (uintmax_t)prev_posn);
2261 http_opt_request_remainder(freq->slot->curl, prev_posn);
2262 }
2263
2264 return freq;
2265
2266 abort:
2267 free(freq->url);
2268 free(freq);
2269 return NULL;
2270 }
2271
2272 void process_http_object_request(struct http_object_request *freq)
2273 {
2274 if (freq->slot == NULL)
2275 return;
2276 freq->curl_result = freq->slot->curl_result;
2277 freq->http_code = freq->slot->http_code;
2278 freq->slot = NULL;
2279 }
2280
2281 int finish_http_object_request(struct http_object_request *freq)
2282 {
2283 struct stat st;
2284
2285 close(freq->localfile);
2286 freq->localfile = -1;
2287
2288 process_http_object_request(freq);
2289
2290 if (freq->http_code == 416) {
2291 warning("requested range invalid; we may already have all the data.");
2292 } else if (freq->curl_result != CURLE_OK) {
2293 if (stat(freq->tmpfile, &st) == 0)
2294 if (st.st_size == 0)
2295 unlink_or_warn(freq->tmpfile);
2296 return -1;
2297 }
2298
2299 git_inflate_end(&freq->stream);
2300 git_SHA1_Final(freq->real_sha1, &freq->c);
2301 if (freq->zret != Z_STREAM_END) {
2302 unlink_or_warn(freq->tmpfile);
2303 return -1;
2304 }
2305 if (hashcmp(freq->sha1, freq->real_sha1)) {
2306 unlink_or_warn(freq->tmpfile);
2307 return -1;
2308 }
2309 freq->rename =
2310 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2311
2312 return freq->rename;
2313 }
2314
2315 void abort_http_object_request(struct http_object_request *freq)
2316 {
2317 unlink_or_warn(freq->tmpfile);
2318
2319 release_http_object_request(freq);
2320 }
2321
2322 void release_http_object_request(struct http_object_request *freq)
2323 {
2324 if (freq->localfile != -1) {
2325 close(freq->localfile);
2326 freq->localfile = -1;
2327 }
2328 if (freq->url != NULL) {
2329 FREE_AND_NULL(freq->url);
2330 }
2331 if (freq->slot != NULL) {
2332 freq->slot->callback_func = NULL;
2333 freq->slot->callback_data = NULL;
2334 release_active_slot(freq->slot);
2335 freq->slot = NULL;
2336 }
2337 }
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