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files_pack_refs(): use a reference transaction to write packed refs
[alt-git.git] / http.c
blob9e40a465fdec6467726e980da413478b9cf78492
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 #ifdef CURLGSSAPI_DELEGATION_FLAG
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 #ifdef CURLGSSAPI_DELEGATION_FLAG
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 #ifdef CURLPROTO_HTTP
682 static long get_curl_allowed_protocols(int from_user)
683 {
684 long allowed_protocols = 0;
685
686 if (is_transport_allowed("http", from_user))
687 allowed_protocols |= CURLPROTO_HTTP;
688 if (is_transport_allowed("https", from_user))
689 allowed_protocols |= CURLPROTO_HTTPS;
690 if (is_transport_allowed("ftp", from_user))
691 allowed_protocols |= CURLPROTO_FTP;
692 if (is_transport_allowed("ftps", from_user))
693 allowed_protocols |= CURLPROTO_FTPS;
694
695 return allowed_protocols;
696 }
697 #endif
698
699 static CURL *get_curl_handle(void)
700 {
701 CURL *result = curl_easy_init();
702
703 if (!result)
704 die("curl_easy_init failed");
705
706 if (!curl_ssl_verify) {
707 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
708 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
709 } else {
710 /* Verify authenticity of the peer's certificate */
711 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
712 /* The name in the cert must match whom we tried to connect */
713 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
714 }
715
716 #if LIBCURL_VERSION_NUM >= 0x070907
717 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
718 #endif
719 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
720 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
721 #endif
722
723 #ifdef CURLGSSAPI_DELEGATION_FLAG
724 if (curl_deleg) {
725 int i;
726 for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) {
727 if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) {
728 curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION,
729 curl_deleg_levels[i].curl_deleg_param);
730 break;
731 }
732 }
733 if (i == ARRAY_SIZE(curl_deleg_levels))
734 warning("Unknown delegation method '%s': using default",
735 curl_deleg);
736 }
737 #endif
738
739 if (http_proactive_auth)
740 init_curl_http_auth(result);
741
742 if (getenv("GIT_SSL_VERSION"))
743 ssl_version = getenv("GIT_SSL_VERSION");
744 if (ssl_version && *ssl_version) {
745 int i;
746 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
747 if (!strcmp(ssl_version, sslversions[i].name)) {
748 curl_easy_setopt(result, CURLOPT_SSLVERSION,
749 sslversions[i].ssl_version);
750 break;
751 }
752 }
753 if (i == ARRAY_SIZE(sslversions))
754 warning("unsupported ssl version %s: using default",
755 ssl_version);
756 }
757
758 if (getenv("GIT_SSL_CIPHER_LIST"))
759 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
760 if (ssl_cipherlist != NULL && *ssl_cipherlist)
761 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
762 ssl_cipherlist);
763
764 if (ssl_cert != NULL)
765 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
766 if (has_cert_password())
767 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
768 #if LIBCURL_VERSION_NUM >= 0x070903
769 if (ssl_key != NULL)
770 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
771 #endif
772 #if LIBCURL_VERSION_NUM >= 0x070908
773 if (ssl_capath != NULL)
774 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
775 #endif
776 #if LIBCURL_VERSION_NUM >= 0x072c00
777 if (ssl_pinnedkey != NULL)
778 curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
779 #endif
780 if (ssl_cainfo != NULL)
781 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
782
783 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
784 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
785 curl_low_speed_limit);
786 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
787 curl_low_speed_time);
788 }
789
790 curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
791 #if LIBCURL_VERSION_NUM >= 0x071301
792 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
793 #elif LIBCURL_VERSION_NUM >= 0x071101
794 curl_easy_setopt(result, CURLOPT_POST301, 1);
795 #endif
796 #ifdef CURLPROTO_HTTP
797 curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
798 get_curl_allowed_protocols(0));
799 curl_easy_setopt(result, CURLOPT_PROTOCOLS,
800 get_curl_allowed_protocols(-1));
801 #else
802 warning("protocol restrictions not applied to curl redirects because\n"
803 "your curl version is too old (>= 7.19.4)");
804 #endif
805 if (getenv("GIT_CURL_VERBOSE"))
806 curl_easy_setopt(result, CURLOPT_VERBOSE, 1L);
807 setup_curl_trace(result);
808
809 curl_easy_setopt(result, CURLOPT_USERAGENT,
810 user_agent ? user_agent : git_user_agent());
811
812 if (curl_ftp_no_epsv)
813 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
814
815 #ifdef CURLOPT_USE_SSL
816 if (curl_ssl_try)
817 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
818 #endif
819
820 /*
821 * CURL also examines these variables as a fallback; but we need to query
822 * them here in order to decide whether to prompt for missing password (cf.
823 * init_curl_proxy_auth()).
824 *
825 * Unlike many other common environment variables, these are historically
826 * lowercase only. It appears that CURL did not know this and implemented
827 * only uppercase variants, which was later corrected to take both - with
828 * the exception of http_proxy, which is lowercase only also in CURL. As
829 * the lowercase versions are the historical quasi-standard, they take
830 * precedence here, as in CURL.
831 */
832 if (!curl_http_proxy) {
833 if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) {
834 var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
835 var_override(&curl_http_proxy, getenv("https_proxy"));
836 } else {
837 var_override(&curl_http_proxy, getenv("http_proxy"));
838 }
839 if (!curl_http_proxy) {
840 var_override(&curl_http_proxy, getenv("ALL_PROXY"));
841 var_override(&curl_http_proxy, getenv("all_proxy"));
842 }
843 }
844
845 if (curl_http_proxy && curl_http_proxy[0] == '\0') {
846 /*
847 * Handle case with the empty http.proxy value here to keep
848 * common code clean.
849 * NB: empty option disables proxying at all.
850 */
851 curl_easy_setopt(result, CURLOPT_PROXY, "");
852 } else if (curl_http_proxy) {
853 #if LIBCURL_VERSION_NUM >= 0x071800
854 if (starts_with(curl_http_proxy, "socks5h"))
855 curl_easy_setopt(result,
856 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
857 else if (starts_with(curl_http_proxy, "socks5"))
858 curl_easy_setopt(result,
859 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
860 else if (starts_with(curl_http_proxy, "socks4a"))
861 curl_easy_setopt(result,
862 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
863 else if (starts_with(curl_http_proxy, "socks"))
864 curl_easy_setopt(result,
865 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
866 #endif
867 if (strstr(curl_http_proxy, "://"))
868 credential_from_url(&proxy_auth, curl_http_proxy);
869 else {
870 struct strbuf url = STRBUF_INIT;
871 strbuf_addf(&url, "http://%s", curl_http_proxy);
872 credential_from_url(&proxy_auth, url.buf);
873 strbuf_release(&url);
874 }
875
876 if (!proxy_auth.host)
877 die("Invalid proxy URL '%s'", curl_http_proxy);
878
879 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
880 #if LIBCURL_VERSION_NUM >= 0x071304
881 var_override(&curl_no_proxy, getenv("NO_PROXY"));
882 var_override(&curl_no_proxy, getenv("no_proxy"));
883 curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy);
884 #endif
885 }
886 init_curl_proxy_auth(result);
887
888 set_curl_keepalive(result);
889
890 return result;
891 }
892
893 static void set_from_env(const char **var, const char *envname)
894 {
895 const char *val = getenv(envname);
896 if (val)
897 *var = val;
898 }
899
900 void http_init(struct remote *remote, const char *url, int proactive_auth)
901 {
902 char *low_speed_limit;
903 char *low_speed_time;
904 char *normalized_url;
905 struct urlmatch_config config = { STRING_LIST_INIT_DUP };
906
907 config.section = "http";
908 config.key = NULL;
909 config.collect_fn = http_options;
910 config.cascade_fn = git_default_config;
911 config.cb = NULL;
912
913 http_is_verbose = 0;
914 normalized_url = url_normalize(url, &config.url);
915
916 git_config(urlmatch_config_entry, &config);
917 free(normalized_url);
918
919 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
920 die("curl_global_init failed");
921
922 http_proactive_auth = proactive_auth;
923
924 if (remote && remote->http_proxy)
925 curl_http_proxy = xstrdup(remote->http_proxy);
926
927 if (remote)
928 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
929
930 pragma_header = curl_slist_append(http_copy_default_headers(),
931 "Pragma: no-cache");
932 no_pragma_header = curl_slist_append(http_copy_default_headers(),
933 "Pragma:");
934
935 #ifdef USE_CURL_MULTI
936 {
937 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
938 if (http_max_requests != NULL)
939 max_requests = atoi(http_max_requests);
940 }
941
942 curlm = curl_multi_init();
943 if (!curlm)
944 die("curl_multi_init failed");
945 #endif
946
947 if (getenv("GIT_SSL_NO_VERIFY"))
948 curl_ssl_verify = 0;
949
950 set_from_env(&ssl_cert, "GIT_SSL_CERT");
951 #if LIBCURL_VERSION_NUM >= 0x070903
952 set_from_env(&ssl_key, "GIT_SSL_KEY");
953 #endif
954 #if LIBCURL_VERSION_NUM >= 0x070908
955 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
956 #endif
957 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
958
959 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
960
961 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
962 if (low_speed_limit != NULL)
963 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
964 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
965 if (low_speed_time != NULL)
966 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
967
968 if (curl_ssl_verify == -1)
969 curl_ssl_verify = 1;
970
971 curl_session_count = 0;
972 #ifdef USE_CURL_MULTI
973 if (max_requests < 1)
974 max_requests = DEFAULT_MAX_REQUESTS;
975 #endif
976
977 if (getenv("GIT_CURL_FTP_NO_EPSV"))
978 curl_ftp_no_epsv = 1;
979
980 if (url) {
981 credential_from_url(&http_auth, url);
982 if (!ssl_cert_password_required &&
983 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
984 starts_with(url, "https://"))
985 ssl_cert_password_required = 1;
986 }
987
988 #ifndef NO_CURL_EASY_DUPHANDLE
989 curl_default = get_curl_handle();
990 #endif
991 }
992
993 void http_cleanup(void)
994 {
995 struct active_request_slot *slot = active_queue_head;
996
997 while (slot != NULL) {
998 struct active_request_slot *next = slot->next;
999 if (slot->curl != NULL) {
1000 xmulti_remove_handle(slot);
1001 curl_easy_cleanup(slot->curl);
1002 }
1003 free(slot);
1004 slot = next;
1005 }
1006 active_queue_head = NULL;
1007
1008 #ifndef NO_CURL_EASY_DUPHANDLE
1009 curl_easy_cleanup(curl_default);
1010 #endif
1011
1012 #ifdef USE_CURL_MULTI
1013 curl_multi_cleanup(curlm);
1014 #endif
1015 curl_global_cleanup();
1016
1017 curl_slist_free_all(extra_http_headers);
1018 extra_http_headers = NULL;
1019
1020 curl_slist_free_all(pragma_header);
1021 pragma_header = NULL;
1022
1023 curl_slist_free_all(no_pragma_header);
1024 no_pragma_header = NULL;
1025
1026 if (curl_http_proxy) {
1027 free((void *)curl_http_proxy);
1028 curl_http_proxy = NULL;
1029 }
1030
1031 if (proxy_auth.password) {
1032 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
1033 FREE_AND_NULL(proxy_auth.password);
1034 }
1035
1036 free((void *)curl_proxyuserpwd);
1037 curl_proxyuserpwd = NULL;
1038
1039 free((void *)http_proxy_authmethod);
1040 http_proxy_authmethod = NULL;
1041
1042 if (cert_auth.password != NULL) {
1043 memset(cert_auth.password, 0, strlen(cert_auth.password));
1044 FREE_AND_NULL(cert_auth.password);
1045 }
1046 ssl_cert_password_required = 0;
1047
1048 FREE_AND_NULL(cached_accept_language);
1049 }
1050
1051 struct active_request_slot *get_active_slot(void)
1052 {
1053 struct active_request_slot *slot = active_queue_head;
1054 struct active_request_slot *newslot;
1055
1056 #ifdef USE_CURL_MULTI
1057 int num_transfers;
1058
1059 /* Wait for a slot to open up if the queue is full */
1060 while (active_requests >= max_requests) {
1061 curl_multi_perform(curlm, &num_transfers);
1062 if (num_transfers < active_requests)
1063 process_curl_messages();
1064 }
1065 #endif
1066
1067 while (slot != NULL && slot->in_use)
1068 slot = slot->next;
1069
1070 if (slot == NULL) {
1071 newslot = xmalloc(sizeof(*newslot));
1072 newslot->curl = NULL;
1073 newslot->in_use = 0;
1074 newslot->next = NULL;
1075
1076 slot = active_queue_head;
1077 if (slot == NULL) {
1078 active_queue_head = newslot;
1079 } else {
1080 while (slot->next != NULL)
1081 slot = slot->next;
1082 slot->next = newslot;
1083 }
1084 slot = newslot;
1085 }
1086
1087 if (slot->curl == NULL) {
1088 #ifdef NO_CURL_EASY_DUPHANDLE
1089 slot->curl = get_curl_handle();
1090 #else
1091 slot->curl = curl_easy_duphandle(curl_default);
1092 #endif
1093 curl_session_count++;
1094 }
1095
1096 active_requests++;
1097 slot->in_use = 1;
1098 slot->results = NULL;
1099 slot->finished = NULL;
1100 slot->callback_data = NULL;
1101 slot->callback_func = NULL;
1102 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
1103 if (curl_save_cookies)
1104 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
1105 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
1106 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1107 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
1108 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
1109 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1110 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
1111 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
1112 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1113 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
1114 curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
1115
1116 /*
1117 * Default following to off unless "ALWAYS" is configured; this gives
1118 * callers a sane starting point, and they can tweak for individual
1119 * HTTP_FOLLOW_* cases themselves.
1120 */
1121 if (http_follow_config == HTTP_FOLLOW_ALWAYS)
1122 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1123 else
1124 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0);
1125
1126 #if LIBCURL_VERSION_NUM >= 0x070a08
1127 curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve);
1128 #endif
1129 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1130 curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
1131 #endif
1132 if (http_auth.password || curl_empty_auth_enabled())
1133 init_curl_http_auth(slot->curl);
1134
1135 return slot;
1136 }
1137
1138 int start_active_slot(struct active_request_slot *slot)
1139 {
1140 #ifdef USE_CURL_MULTI
1141 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
1142 int num_transfers;
1143
1144 if (curlm_result != CURLM_OK &&
1145 curlm_result != CURLM_CALL_MULTI_PERFORM) {
1146 warning("curl_multi_add_handle failed: %s",
1147 curl_multi_strerror(curlm_result));
1148 active_requests--;
1149 slot->in_use = 0;
1150 return 0;
1151 }
1152
1153 /*
1154 * We know there must be something to do, since we just added
1155 * something.
1156 */
1157 curl_multi_perform(curlm, &num_transfers);
1158 #endif
1159 return 1;
1160 }
1161
1162 #ifdef USE_CURL_MULTI
1163 struct fill_chain {
1164 void *data;
1165 int (*fill)(void *);
1166 struct fill_chain *next;
1167 };
1168
1169 static struct fill_chain *fill_cfg;
1170
1171 void add_fill_function(void *data, int (*fill)(void *))
1172 {
1173 struct fill_chain *new = xmalloc(sizeof(*new));
1174 struct fill_chain **linkp = &fill_cfg;
1175 new->data = data;
1176 new->fill = fill;
1177 new->next = NULL;
1178 while (*linkp)
1179 linkp = &(*linkp)->next;
1180 *linkp = new;
1181 }
1182
1183 void fill_active_slots(void)
1184 {
1185 struct active_request_slot *slot = active_queue_head;
1186
1187 while (active_requests < max_requests) {
1188 struct fill_chain *fill;
1189 for (fill = fill_cfg; fill; fill = fill->next)
1190 if (fill->fill(fill->data))
1191 break;
1192
1193 if (!fill)
1194 break;
1195 }
1196
1197 while (slot != NULL) {
1198 if (!slot->in_use && slot->curl != NULL
1199 && curl_session_count > min_curl_sessions) {
1200 curl_easy_cleanup(slot->curl);
1201 slot->curl = NULL;
1202 curl_session_count--;
1203 }
1204 slot = slot->next;
1205 }
1206 }
1207
1208 void step_active_slots(void)
1209 {
1210 int num_transfers;
1211 CURLMcode curlm_result;
1212
1213 do {
1214 curlm_result = curl_multi_perform(curlm, &num_transfers);
1215 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
1216 if (num_transfers < active_requests) {
1217 process_curl_messages();
1218 fill_active_slots();
1219 }
1220 }
1221 #endif
1222
1223 void run_active_slot(struct active_request_slot *slot)
1224 {
1225 #ifdef USE_CURL_MULTI
1226 fd_set readfds;
1227 fd_set writefds;
1228 fd_set excfds;
1229 int max_fd;
1230 struct timeval select_timeout;
1231 int finished = 0;
1232
1233 slot->finished = &finished;
1234 while (!finished) {
1235 step_active_slots();
1236
1237 if (slot->in_use) {
1238 #if LIBCURL_VERSION_NUM >= 0x070f04
1239 long curl_timeout;
1240 curl_multi_timeout(curlm, &curl_timeout);
1241 if (curl_timeout == 0) {
1242 continue;
1243 } else if (curl_timeout == -1) {
1244 select_timeout.tv_sec = 0;
1245 select_timeout.tv_usec = 50000;
1246 } else {
1247 select_timeout.tv_sec = curl_timeout / 1000;
1248 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
1249 }
1250 #else
1251 select_timeout.tv_sec = 0;
1252 select_timeout.tv_usec = 50000;
1253 #endif
1254
1255 max_fd = -1;
1256 FD_ZERO(&readfds);
1257 FD_ZERO(&writefds);
1258 FD_ZERO(&excfds);
1259 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
1260
1261 /*
1262 * It can happen that curl_multi_timeout returns a pathologically
1263 * long timeout when curl_multi_fdset returns no file descriptors
1264 * to read. See commit message for more details.
1265 */
1266 if (max_fd < 0 &&
1267 (select_timeout.tv_sec > 0 ||
1268 select_timeout.tv_usec > 50000)) {
1269 select_timeout.tv_sec = 0;
1270 select_timeout.tv_usec = 50000;
1271 }
1272
1273 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
1274 }
1275 }
1276 #else
1277 while (slot->in_use) {
1278 slot->curl_result = curl_easy_perform(slot->curl);
1279 finish_active_slot(slot);
1280 }
1281 #endif
1282 }
1283
1284 static void release_active_slot(struct active_request_slot *slot)
1285 {
1286 closedown_active_slot(slot);
1287 if (slot->curl) {
1288 xmulti_remove_handle(slot);
1289 if (curl_session_count > min_curl_sessions) {
1290 curl_easy_cleanup(slot->curl);
1291 slot->curl = NULL;
1292 curl_session_count--;
1293 }
1294 }
1295 #ifdef USE_CURL_MULTI
1296 fill_active_slots();
1297 #endif
1298 }
1299
1300 void finish_all_active_slots(void)
1301 {
1302 struct active_request_slot *slot = active_queue_head;
1303
1304 while (slot != NULL)
1305 if (slot->in_use) {
1306 run_active_slot(slot);
1307 slot = active_queue_head;
1308 } else {
1309 slot = slot->next;
1310 }
1311 }
1312
1313 /* Helpers for modifying and creating URLs */
1314 static inline int needs_quote(int ch)
1315 {
1316 if (((ch >= 'A') && (ch <= 'Z'))
1317 || ((ch >= 'a') && (ch <= 'z'))
1318 || ((ch >= '0') && (ch <= '9'))
1319 || (ch == '/')
1320 || (ch == '-')
1321 || (ch == '.'))
1322 return 0;
1323 return 1;
1324 }
1325
1326 static char *quote_ref_url(const char *base, const char *ref)
1327 {
1328 struct strbuf buf = STRBUF_INIT;
1329 const char *cp;
1330 int ch;
1331
1332 end_url_with_slash(&buf, base);
1333
1334 for (cp = ref; (ch = *cp) != 0; cp++)
1335 if (needs_quote(ch))
1336 strbuf_addf(&buf, "%%%02x", ch);
1337 else
1338 strbuf_addch(&buf, *cp);
1339
1340 return strbuf_detach(&buf, NULL);
1341 }
1342
1343 void append_remote_object_url(struct strbuf *buf, const char *url,
1344 const char *hex,
1345 int only_two_digit_prefix)
1346 {
1347 end_url_with_slash(buf, url);
1348
1349 strbuf_addf(buf, "objects/%.*s/", 2, hex);
1350 if (!only_two_digit_prefix)
1351 strbuf_addstr(buf, hex + 2);
1352 }
1353
1354 char *get_remote_object_url(const char *url, const char *hex,
1355 int only_two_digit_prefix)
1356 {
1357 struct strbuf buf = STRBUF_INIT;
1358 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1359 return strbuf_detach(&buf, NULL);
1360 }
1361
1362 static int handle_curl_result(struct slot_results *results)
1363 {
1364 /*
1365 * If we see a failing http code with CURLE_OK, we have turned off
1366 * FAILONERROR (to keep the server's custom error response), and should
1367 * translate the code into failure here.
1368 *
1369 * Likewise, if we see a redirect (30x code), that means we turned off
1370 * redirect-following, and we should treat the result as an error.
1371 */
1372 if (results->curl_result == CURLE_OK &&
1373 results->http_code >= 300) {
1374 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1375 /*
1376 * Normally curl will already have put the "reason phrase"
1377 * from the server into curl_errorstr; unfortunately without
1378 * FAILONERROR it is lost, so we can give only the numeric
1379 * status code.
1380 */
1381 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1382 "The requested URL returned error: %ld",
1383 results->http_code);
1384 }
1385
1386 if (results->curl_result == CURLE_OK) {
1387 credential_approve(&http_auth);
1388 if (proxy_auth.password)
1389 credential_approve(&proxy_auth);
1390 return HTTP_OK;
1391 } else if (missing_target(results))
1392 return HTTP_MISSING_TARGET;
1393 else if (results->http_code == 401) {
1394 if (http_auth.username && http_auth.password) {
1395 credential_reject(&http_auth);
1396 return HTTP_NOAUTH;
1397 } else {
1398 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1399 http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1400 if (results->auth_avail) {
1401 http_auth_methods &= results->auth_avail;
1402 http_auth_methods_restricted = 1;
1403 }
1404 #endif
1405 return HTTP_REAUTH;
1406 }
1407 } else {
1408 if (results->http_connectcode == 407)
1409 credential_reject(&proxy_auth);
1410 #if LIBCURL_VERSION_NUM >= 0x070c00
1411 if (!curl_errorstr[0])
1412 strlcpy(curl_errorstr,
1413 curl_easy_strerror(results->curl_result),
1414 sizeof(curl_errorstr));
1415 #endif
1416 return HTTP_ERROR;
1417 }
1418 }
1419
1420 int run_one_slot(struct active_request_slot *slot,
1421 struct slot_results *results)
1422 {
1423 slot->results = results;
1424 if (!start_active_slot(slot)) {
1425 xsnprintf(curl_errorstr, sizeof(curl_errorstr),
1426 "failed to start HTTP request");
1427 return HTTP_START_FAILED;
1428 }
1429
1430 run_active_slot(slot);
1431 return handle_curl_result(results);
1432 }
1433
1434 struct curl_slist *http_copy_default_headers(void)
1435 {
1436 struct curl_slist *headers = NULL, *h;
1437
1438 for (h = extra_http_headers; h; h = h->next)
1439 headers = curl_slist_append(headers, h->data);
1440
1441 return headers;
1442 }
1443
1444 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1445 {
1446 char *ptr;
1447 CURLcode ret;
1448
1449 strbuf_reset(buf);
1450 ret = curl_easy_getinfo(curl, info, &ptr);
1451 if (!ret && ptr)
1452 strbuf_addstr(buf, ptr);
1453 return ret;
1454 }
1455
1456 /*
1457 * Check for and extract a content-type parameter. "raw"
1458 * should be positioned at the start of the potential
1459 * parameter, with any whitespace already removed.
1460 *
1461 * "name" is the name of the parameter. The value is appended
1462 * to "out".
1463 */
1464 static int extract_param(const char *raw, const char *name,
1465 struct strbuf *out)
1466 {
1467 size_t len = strlen(name);
1468
1469 if (strncasecmp(raw, name, len))
1470 return -1;
1471 raw += len;
1472
1473 if (*raw != '=')
1474 return -1;
1475 raw++;
1476
1477 while (*raw && !isspace(*raw) && *raw != ';')
1478 strbuf_addch(out, *raw++);
1479 return 0;
1480 }
1481
1482 /*
1483 * Extract a normalized version of the content type, with any
1484 * spaces suppressed, all letters lowercased, and no trailing ";"
1485 * or parameters.
1486 *
1487 * Note that we will silently remove even invalid whitespace. For
1488 * example, "text / plain" is specifically forbidden by RFC 2616,
1489 * but "text/plain" is the only reasonable output, and this keeps
1490 * our code simple.
1491 *
1492 * If the "charset" argument is not NULL, store the value of any
1493 * charset parameter there.
1494 *
1495 * Example:
1496 * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1497 * "text / plain" -> "text/plain"
1498 */
1499 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1500 struct strbuf *charset)
1501 {
1502 const char *p;
1503
1504 strbuf_reset(type);
1505 strbuf_grow(type, raw->len);
1506 for (p = raw->buf; *p; p++) {
1507 if (isspace(*p))
1508 continue;
1509 if (*p == ';') {
1510 p++;
1511 break;
1512 }
1513 strbuf_addch(type, tolower(*p));
1514 }
1515
1516 if (!charset)
1517 return;
1518
1519 strbuf_reset(charset);
1520 while (*p) {
1521 while (isspace(*p) || *p == ';')
1522 p++;
1523 if (!extract_param(p, "charset", charset))
1524 return;
1525 while (*p && !isspace(*p))
1526 p++;
1527 }
1528
1529 if (!charset->len && starts_with(type->buf, "text/"))
1530 strbuf_addstr(charset, "ISO-8859-1");
1531 }
1532
1533 static void write_accept_language(struct strbuf *buf)
1534 {
1535 /*
1536 * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1537 * that, q-value will be smaller than 0.001, the minimum q-value the
1538 * HTTP specification allows. See
1539 * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1540 */
1541 const int MAX_DECIMAL_PLACES = 3;
1542 const int MAX_LANGUAGE_TAGS = 1000;
1543 const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1544 char **language_tags = NULL;
1545 int num_langs = 0;
1546 const char *s = get_preferred_languages();
1547 int i;
1548 struct strbuf tag = STRBUF_INIT;
1549
1550 /* Don't add Accept-Language header if no language is preferred. */
1551 if (!s)
1552 return;
1553
1554 /*
1555 * Split the colon-separated string of preferred languages into
1556 * language_tags array.
1557 */
1558 do {
1559 /* collect language tag */
1560 for (; *s && (isalnum(*s) || *s == '_'); s++)
1561 strbuf_addch(&tag, *s == '_' ? '-' : *s);
1562
1563 /* skip .codeset, @modifier and any other unnecessary parts */
1564 while (*s && *s != ':')
1565 s++;
1566
1567 if (tag.len) {
1568 num_langs++;
1569 REALLOC_ARRAY(language_tags, num_langs);
1570 language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1571 if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1572 break;
1573 }
1574 } while (*s++);
1575
1576 /* write Accept-Language header into buf */
1577 if (num_langs) {
1578 int last_buf_len = 0;
1579 int max_q;
1580 int decimal_places;
1581 char q_format[32];
1582
1583 /* add '*' */
1584 REALLOC_ARRAY(language_tags, num_langs + 1);
1585 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1586
1587 /* compute decimal_places */
1588 for (max_q = 1, decimal_places = 0;
1589 max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1590 decimal_places++, max_q *= 10)
1591 ;
1592
1593 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1594
1595 strbuf_addstr(buf, "Accept-Language: ");
1596
1597 for (i = 0; i < num_langs; i++) {
1598 if (i > 0)
1599 strbuf_addstr(buf, ", ");
1600
1601 strbuf_addstr(buf, language_tags[i]);
1602
1603 if (i > 0)
1604 strbuf_addf(buf, q_format, max_q - i);
1605
1606 if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1607 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1608 break;
1609 }
1610
1611 last_buf_len = buf->len;
1612 }
1613 }
1614
1615 /* free language tags -- last one is a static '*' */
1616 for (i = 0; i < num_langs - 1; i++)
1617 free(language_tags[i]);
1618 free(language_tags);
1619 }
1620
1621 /*
1622 * Get an Accept-Language header which indicates user's preferred languages.
1623 *
1624 * Examples:
1625 * LANGUAGE= -> ""
1626 * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1627 * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1628 * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1629 * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1630 * LANGUAGE= LANG=C -> ""
1631 */
1632 static const char *get_accept_language(void)
1633 {
1634 if (!cached_accept_language) {
1635 struct strbuf buf = STRBUF_INIT;
1636 write_accept_language(&buf);
1637 if (buf.len > 0)
1638 cached_accept_language = strbuf_detach(&buf, NULL);
1639 }
1640
1641 return cached_accept_language;
1642 }
1643
1644 static void http_opt_request_remainder(CURL *curl, off_t pos)
1645 {
1646 char buf[128];
1647 xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1648 curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1649 }
1650
1651 /* http_request() targets */
1652 #define HTTP_REQUEST_STRBUF 0
1653 #define HTTP_REQUEST_FILE 1
1654
1655 static int http_request(const char *url,
1656 void *result, int target,
1657 const struct http_get_options *options)
1658 {
1659 struct active_request_slot *slot;
1660 struct slot_results results;
1661 struct curl_slist *headers = http_copy_default_headers();
1662 struct strbuf buf = STRBUF_INIT;
1663 const char *accept_language;
1664 int ret;
1665
1666 slot = get_active_slot();
1667 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1668
1669 if (result == NULL) {
1670 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1671 } else {
1672 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1673 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1674
1675 if (target == HTTP_REQUEST_FILE) {
1676 off_t posn = ftello(result);
1677 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1678 fwrite);
1679 if (posn > 0)
1680 http_opt_request_remainder(slot->curl, posn);
1681 } else
1682 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1683 fwrite_buffer);
1684 }
1685
1686 accept_language = get_accept_language();
1687
1688 if (accept_language)
1689 headers = curl_slist_append(headers, accept_language);
1690
1691 strbuf_addstr(&buf, "Pragma:");
1692 if (options && options->no_cache)
1693 strbuf_addstr(&buf, " no-cache");
1694 if (options && options->keep_error)
1695 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1696 if (options && options->initial_request &&
1697 http_follow_config == HTTP_FOLLOW_INITIAL)
1698 curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1);
1699
1700 headers = curl_slist_append(headers, buf.buf);
1701
1702 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1703 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1704 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1705
1706 ret = run_one_slot(slot, &results);
1707
1708 if (options && options->content_type) {
1709 struct strbuf raw = STRBUF_INIT;
1710 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1711 extract_content_type(&raw, options->content_type,
1712 options->charset);
1713 strbuf_release(&raw);
1714 }
1715
1716 if (options && options->effective_url)
1717 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1718 options->effective_url);
1719
1720 curl_slist_free_all(headers);
1721 strbuf_release(&buf);
1722
1723 return ret;
1724 }
1725
1726 /*
1727 * Update the "base" url to a more appropriate value, as deduced by
1728 * redirects seen when requesting a URL starting with "url".
1729 *
1730 * The "asked" parameter is a URL that we asked curl to access, and must begin
1731 * with "base".
1732 *
1733 * The "got" parameter is the URL that curl reported to us as where we ended
1734 * up.
1735 *
1736 * Returns 1 if we updated the base url, 0 otherwise.
1737 *
1738 * Our basic strategy is to compare "base" and "asked" to find the bits
1739 * specific to our request. We then strip those bits off of "got" to yield the
1740 * new base. So for example, if our base is "http://example.com/foo.git",
1741 * and we ask for "http://example.com/foo.git/info/refs", we might end up
1742 * with "https://other.example.com/foo.git/info/refs". We would want the
1743 * new URL to become "https://other.example.com/foo.git".
1744 *
1745 * Note that this assumes a sane redirect scheme. It's entirely possible
1746 * in the example above to end up at a URL that does not even end in
1747 * "info/refs". In such a case we die. There's not much we can do, such a
1748 * scheme is unlikely to represent a real git repository, and failing to
1749 * rewrite the base opens options for malicious redirects to do funny things.
1750 */
1751 static int update_url_from_redirect(struct strbuf *base,
1752 const char *asked,
1753 const struct strbuf *got)
1754 {
1755 const char *tail;
1756 size_t new_len;
1757
1758 if (!strcmp(asked, got->buf))
1759 return 0;
1760
1761 if (!skip_prefix(asked, base->buf, &tail))
1762 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1763 asked, base->buf);
1764
1765 new_len = got->len;
1766 if (!strip_suffix_mem(got->buf, &new_len, tail))
1767 die(_("unable to update url base from redirection:\n"
1768 " asked for: %s\n"
1769 " redirect: %s"),
1770 asked, got->buf);
1771
1772 strbuf_reset(base);
1773 strbuf_add(base, got->buf, new_len);
1774
1775 return 1;
1776 }
1777
1778 static int http_request_reauth(const char *url,
1779 void *result, int target,
1780 struct http_get_options *options)
1781 {
1782 int ret = http_request(url, result, target, options);
1783
1784 if (ret != HTTP_OK && ret != HTTP_REAUTH)
1785 return ret;
1786
1787 if (options && options->effective_url && options->base_url) {
1788 if (update_url_from_redirect(options->base_url,
1789 url, options->effective_url)) {
1790 credential_from_url(&http_auth, options->base_url->buf);
1791 url = options->effective_url->buf;
1792 }
1793 }
1794
1795 if (ret != HTTP_REAUTH)
1796 return ret;
1797
1798 /*
1799 * If we are using KEEP_ERROR, the previous request may have
1800 * put cruft into our output stream; we should clear it out before
1801 * making our next request. We only know how to do this for
1802 * the strbuf case, but that is enough to satisfy current callers.
1803 */
1804 if (options && options->keep_error) {
1805 switch (target) {
1806 case HTTP_REQUEST_STRBUF:
1807 strbuf_reset(result);
1808 break;
1809 default:
1810 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1811 }
1812 }
1813
1814 credential_fill(&http_auth);
1815
1816 return http_request(url, result, target, options);
1817 }
1818
1819 int http_get_strbuf(const char *url,
1820 struct strbuf *result,
1821 struct http_get_options *options)
1822 {
1823 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1824 }
1825
1826 /*
1827 * Downloads a URL and stores the result in the given file.
1828 *
1829 * If a previous interrupted download is detected (i.e. a previous temporary
1830 * file is still around) the download is resumed.
1831 */
1832 static int http_get_file(const char *url, const char *filename,
1833 struct http_get_options *options)
1834 {
1835 int ret;
1836 struct strbuf tmpfile = STRBUF_INIT;
1837 FILE *result;
1838
1839 strbuf_addf(&tmpfile, "%s.temp", filename);
1840 result = fopen(tmpfile.buf, "a");
1841 if (!result) {
1842 error("Unable to open local file %s", tmpfile.buf);
1843 ret = HTTP_ERROR;
1844 goto cleanup;
1845 }
1846
1847 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1848 fclose(result);
1849
1850 if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1851 ret = HTTP_ERROR;
1852 cleanup:
1853 strbuf_release(&tmpfile);
1854 return ret;
1855 }
1856
1857 int http_fetch_ref(const char *base, struct ref *ref)
1858 {
1859 struct http_get_options options = {0};
1860 char *url;
1861 struct strbuf buffer = STRBUF_INIT;
1862 int ret = -1;
1863
1864 options.no_cache = 1;
1865
1866 url = quote_ref_url(base, ref->name);
1867 if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1868 strbuf_rtrim(&buffer);
1869 if (buffer.len == 40)
1870 ret = get_oid_hex(buffer.buf, &ref->old_oid);
1871 else if (starts_with(buffer.buf, "ref: ")) {
1872 ref->symref = xstrdup(buffer.buf + 5);
1873 ret = 0;
1874 }
1875 }
1876
1877 strbuf_release(&buffer);
1878 free(url);
1879 return ret;
1880 }
1881
1882 /* Helpers for fetching packs */
1883 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1884 {
1885 char *url, *tmp;
1886 struct strbuf buf = STRBUF_INIT;
1887
1888 if (http_is_verbose)
1889 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1890
1891 end_url_with_slash(&buf, base_url);
1892 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1893 url = strbuf_detach(&buf, NULL);
1894
1895 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1896 tmp = strbuf_detach(&buf, NULL);
1897
1898 if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1899 error("Unable to get pack index %s", url);
1900 FREE_AND_NULL(tmp);
1901 }
1902
1903 free(url);
1904 return tmp;
1905 }
1906
1907 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1908 unsigned char *sha1, const char *base_url)
1909 {
1910 struct packed_git *new_pack;
1911 char *tmp_idx = NULL;
1912 int ret;
1913
1914 if (has_pack_index(sha1)) {
1915 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1916 if (!new_pack)
1917 return -1; /* parse_pack_index() already issued error message */
1918 goto add_pack;
1919 }
1920
1921 tmp_idx = fetch_pack_index(sha1, base_url);
1922 if (!tmp_idx)
1923 return -1;
1924
1925 new_pack = parse_pack_index(sha1, tmp_idx);
1926 if (!new_pack) {
1927 unlink(tmp_idx);
1928 free(tmp_idx);
1929
1930 return -1; /* parse_pack_index() already issued error message */
1931 }
1932
1933 ret = verify_pack_index(new_pack);
1934 if (!ret) {
1935 close_pack_index(new_pack);
1936 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1937 }
1938 free(tmp_idx);
1939 if (ret)
1940 return -1;
1941
1942 add_pack:
1943 new_pack->next = *packs_head;
1944 *packs_head = new_pack;
1945 return 0;
1946 }
1947
1948 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1949 {
1950 struct http_get_options options = {0};
1951 int ret = 0, i = 0;
1952 char *url, *data;
1953 struct strbuf buf = STRBUF_INIT;
1954 unsigned char sha1[20];
1955
1956 end_url_with_slash(&buf, base_url);
1957 strbuf_addstr(&buf, "objects/info/packs");
1958 url = strbuf_detach(&buf, NULL);
1959
1960 options.no_cache = 1;
1961 ret = http_get_strbuf(url, &buf, &options);
1962 if (ret != HTTP_OK)
1963 goto cleanup;
1964
1965 data = buf.buf;
1966 while (i < buf.len) {
1967 switch (data[i]) {
1968 case 'P':
1969 i++;
1970 if (i + 52 <= buf.len &&
1971 starts_with(data + i, " pack-") &&
1972 starts_with(data + i + 46, ".pack\n")) {
1973 get_sha1_hex(data + i + 6, sha1);
1974 fetch_and_setup_pack_index(packs_head, sha1,
1975 base_url);
1976 i += 51;
1977 break;
1978 }
1979 default:
1980 while (i < buf.len && data[i] != '\n')
1981 i++;
1982 }
1983 i++;
1984 }
1985
1986 cleanup:
1987 free(url);
1988 return ret;
1989 }
1990
1991 void release_http_pack_request(struct http_pack_request *preq)
1992 {
1993 if (preq->packfile != NULL) {
1994 fclose(preq->packfile);
1995 preq->packfile = NULL;
1996 }
1997 preq->slot = NULL;
1998 free(preq->url);
1999 free(preq);
2000 }
2001
2002 int finish_http_pack_request(struct http_pack_request *preq)
2003 {
2004 struct packed_git **lst;
2005 struct packed_git *p = preq->target;
2006 char *tmp_idx;
2007 size_t len;
2008 struct child_process ip = CHILD_PROCESS_INIT;
2009 const char *ip_argv[8];
2010
2011 close_pack_index(p);
2012
2013 fclose(preq->packfile);
2014 preq->packfile = NULL;
2015
2016 lst = preq->lst;
2017 while (*lst != p)
2018 lst = &((*lst)->next);
2019 *lst = (*lst)->next;
2020
2021 if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
2022 die("BUG: pack tmpfile does not end in .pack.temp?");
2023 tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
2024
2025 ip_argv[0] = "index-pack";
2026 ip_argv[1] = "-o";
2027 ip_argv[2] = tmp_idx;
2028 ip_argv[3] = preq->tmpfile;
2029 ip_argv[4] = NULL;
2030
2031 ip.argv = ip_argv;
2032 ip.git_cmd = 1;
2033 ip.no_stdin = 1;
2034 ip.no_stdout = 1;
2035
2036 if (run_command(&ip)) {
2037 unlink(preq->tmpfile);
2038 unlink(tmp_idx);
2039 free(tmp_idx);
2040 return -1;
2041 }
2042
2043 unlink(sha1_pack_index_name(p->sha1));
2044
2045 if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
2046 || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
2047 free(tmp_idx);
2048 return -1;
2049 }
2050
2051 install_packed_git(p);
2052 free(tmp_idx);
2053 return 0;
2054 }
2055
2056 struct http_pack_request *new_http_pack_request(
2057 struct packed_git *target, const char *base_url)
2058 {
2059 off_t prev_posn = 0;
2060 struct strbuf buf = STRBUF_INIT;
2061 struct http_pack_request *preq;
2062
2063 preq = xcalloc(1, sizeof(*preq));
2064 preq->target = target;
2065
2066 end_url_with_slash(&buf, base_url);
2067 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
2068 sha1_to_hex(target->sha1));
2069 preq->url = strbuf_detach(&buf, NULL);
2070
2071 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
2072 sha1_pack_name(target->sha1));
2073 preq->packfile = fopen(preq->tmpfile, "a");
2074 if (!preq->packfile) {
2075 error("Unable to open local file %s for pack",
2076 preq->tmpfile);
2077 goto abort;
2078 }
2079
2080 preq->slot = get_active_slot();
2081 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
2082 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
2083 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2084 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
2085 no_pragma_header);
2086
2087 /*
2088 * If there is data present from a previous transfer attempt,
2089 * resume where it left off
2090 */
2091 prev_posn = ftello(preq->packfile);
2092 if (prev_posn>0) {
2093 if (http_is_verbose)
2094 fprintf(stderr,
2095 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
2096 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
2097 http_opt_request_remainder(preq->slot->curl, prev_posn);
2098 }
2099
2100 return preq;
2101
2102 abort:
2103 free(preq->url);
2104 free(preq);
2105 return NULL;
2106 }
2107
2108 /* Helpers for fetching objects (loose) */
2109 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
2110 void *data)
2111 {
2112 unsigned char expn[4096];
2113 size_t size = eltsize * nmemb;
2114 int posn = 0;
2115 struct http_object_request *freq = data;
2116 struct active_request_slot *slot = freq->slot;
2117
2118 if (slot) {
2119 CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE,
2120 &slot->http_code);
2121 if (c != CURLE_OK)
2122 die("BUG: curl_easy_getinfo for HTTP code failed: %s",
2123 curl_easy_strerror(c));
2124 if (slot->http_code >= 300)
2125 return size;
2126 }
2127
2128 do {
2129 ssize_t retval = xwrite(freq->localfile,
2130 (char *) ptr + posn, size - posn);
2131 if (retval < 0)
2132 return posn;
2133 posn += retval;
2134 } while (posn < size);
2135
2136 freq->stream.avail_in = size;
2137 freq->stream.next_in = (void *)ptr;
2138 do {
2139 freq->stream.next_out = expn;
2140 freq->stream.avail_out = sizeof(expn);
2141 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
2142 git_SHA1_Update(&freq->c, expn,
2143 sizeof(expn) - freq->stream.avail_out);
2144 } while (freq->stream.avail_in && freq->zret == Z_OK);
2145 return size;
2146 }
2147
2148 struct http_object_request *new_http_object_request(const char *base_url,
2149 unsigned char *sha1)
2150 {
2151 char *hex = sha1_to_hex(sha1);
2152 const char *filename;
2153 char prevfile[PATH_MAX];
2154 int prevlocal;
2155 char prev_buf[PREV_BUF_SIZE];
2156 ssize_t prev_read = 0;
2157 off_t prev_posn = 0;
2158 struct http_object_request *freq;
2159
2160 freq = xcalloc(1, sizeof(*freq));
2161 hashcpy(freq->sha1, sha1);
2162 freq->localfile = -1;
2163
2164 filename = sha1_file_name(sha1);
2165 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
2166 "%s.temp", filename);
2167
2168 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
2169 unlink_or_warn(prevfile);
2170 rename(freq->tmpfile, prevfile);
2171 unlink_or_warn(freq->tmpfile);
2172
2173 if (freq->localfile != -1)
2174 error("fd leakage in start: %d", freq->localfile);
2175 freq->localfile = open(freq->tmpfile,
2176 O_WRONLY | O_CREAT | O_EXCL, 0666);
2177 /*
2178 * This could have failed due to the "lazy directory creation";
2179 * try to mkdir the last path component.
2180 */
2181 if (freq->localfile < 0 && errno == ENOENT) {
2182 char *dir = strrchr(freq->tmpfile, '/');
2183 if (dir) {
2184 *dir = 0;
2185 mkdir(freq->tmpfile, 0777);
2186 *dir = '/';
2187 }
2188 freq->localfile = open(freq->tmpfile,
2189 O_WRONLY | O_CREAT | O_EXCL, 0666);
2190 }
2191
2192 if (freq->localfile < 0) {
2193 error_errno("Couldn't create temporary file %s", freq->tmpfile);
2194 goto abort;
2195 }
2196
2197 git_inflate_init(&freq->stream);
2198
2199 git_SHA1_Init(&freq->c);
2200
2201 freq->url = get_remote_object_url(base_url, hex, 0);
2202
2203 /*
2204 * If a previous temp file is present, process what was already
2205 * fetched.
2206 */
2207 prevlocal = open(prevfile, O_RDONLY);
2208 if (prevlocal != -1) {
2209 do {
2210 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
2211 if (prev_read>0) {
2212 if (fwrite_sha1_file(prev_buf,
2213 1,
2214 prev_read,
2215 freq) == prev_read) {
2216 prev_posn += prev_read;
2217 } else {
2218 prev_read = -1;
2219 }
2220 }
2221 } while (prev_read > 0);
2222 close(prevlocal);
2223 }
2224 unlink_or_warn(prevfile);
2225
2226 /*
2227 * Reset inflate/SHA1 if there was an error reading the previous temp
2228 * file; also rewind to the beginning of the local file.
2229 */
2230 if (prev_read == -1) {
2231 memset(&freq->stream, 0, sizeof(freq->stream));
2232 git_inflate_init(&freq->stream);
2233 git_SHA1_Init(&freq->c);
2234 if (prev_posn>0) {
2235 prev_posn = 0;
2236 lseek(freq->localfile, 0, SEEK_SET);
2237 if (ftruncate(freq->localfile, 0) < 0) {
2238 error_errno("Couldn't truncate temporary file %s",
2239 freq->tmpfile);
2240 goto abort;
2241 }
2242 }
2243 }
2244
2245 freq->slot = get_active_slot();
2246
2247 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
2248 curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0);
2249 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
2250 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
2251 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
2252 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
2253
2254 /*
2255 * If we have successfully processed data from a previous fetch
2256 * attempt, only fetch the data we don't already have.
2257 */
2258 if (prev_posn>0) {
2259 if (http_is_verbose)
2260 fprintf(stderr,
2261 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
2262 hex, (uintmax_t)prev_posn);
2263 http_opt_request_remainder(freq->slot->curl, prev_posn);
2264 }
2265
2266 return freq;
2267
2268 abort:
2269 free(freq->url);
2270 free(freq);
2271 return NULL;
2272 }
2273
2274 void process_http_object_request(struct http_object_request *freq)
2275 {
2276 if (freq->slot == NULL)
2277 return;
2278 freq->curl_result = freq->slot->curl_result;
2279 freq->http_code = freq->slot->http_code;
2280 freq->slot = NULL;
2281 }
2282
2283 int finish_http_object_request(struct http_object_request *freq)
2284 {
2285 struct stat st;
2286
2287 close(freq->localfile);
2288 freq->localfile = -1;
2289
2290 process_http_object_request(freq);
2291
2292 if (freq->http_code == 416) {
2293 warning("requested range invalid; we may already have all the data.");
2294 } else if (freq->curl_result != CURLE_OK) {
2295 if (stat(freq->tmpfile, &st) == 0)
2296 if (st.st_size == 0)
2297 unlink_or_warn(freq->tmpfile);
2298 return -1;
2299 }
2300
2301 git_inflate_end(&freq->stream);
2302 git_SHA1_Final(freq->real_sha1, &freq->c);
2303 if (freq->zret != Z_STREAM_END) {
2304 unlink_or_warn(freq->tmpfile);
2305 return -1;
2306 }
2307 if (hashcmp(freq->sha1, freq->real_sha1)) {
2308 unlink_or_warn(freq->tmpfile);
2309 return -1;
2310 }
2311 freq->rename =
2312 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
2313
2314 return freq->rename;
2315 }
2316
2317 void abort_http_object_request(struct http_object_request *freq)
2318 {
2319 unlink_or_warn(freq->tmpfile);
2320
2321 release_http_object_request(freq);
2322 }
2323
2324 void release_http_object_request(struct http_object_request *freq)
2325 {
2326 if (freq->localfile != -1) {
2327 close(freq->localfile);
2328 freq->localfile = -1;
2329 }
2330 if (freq->url != NULL) {
2331 FREE_AND_NULL(freq->url);
2332 }
2333 if (freq->slot != NULL) {
2334 freq->slot->callback_func = NULL;
2335 freq->slot->callback_data = NULL;
2336 release_active_slot(freq->slot);
2337 freq->slot = NULL;
2338 }
2339 }
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