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1 | #include "git-compat-util.h" | |
2 | #include "http.h" | |
3 | #include "config.h" | |
4 | #include "pack.h" | |
5 | #include "sideband.h" | |
6 | #include "run-command.h" | |
7 | #include "url.h" | |
8 | #include "urlmatch.h" | |
9 | #include "credential.h" | |
10 | #include "version.h" | |
11 | #include "pkt-line.h" | |
12 | #include "gettext.h" | |
13 | #include "transport.h" | |
14 | #include "packfile.h" | |
15 | #include "protocol.h" | |
16 | #include "string-list.h" | |
17 | #include "object-store.h" | |
18 | ||
19 | static struct trace_key trace_curl = TRACE_KEY_INIT(CURL); | |
20 | static int trace_curl_data = 1; | |
21 | static struct string_list cookies_to_redact = STRING_LIST_INIT_DUP; | |
22 | #if LIBCURL_VERSION_NUM >= 0x070a08 | |
23 | long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER; | |
24 | #else | |
25 | long int git_curl_ipresolve; | |
26 | #endif | |
27 | int active_requests; | |
28 | int http_is_verbose; | |
29 | ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX; | |
30 | ||
31 | #if LIBCURL_VERSION_NUM >= 0x070a06 | |
32 | #define LIBCURL_CAN_HANDLE_AUTH_ANY | |
33 | #endif | |
34 | ||
35 | static int min_curl_sessions = 1; | |
36 | static int curl_session_count; | |
37 | #ifdef USE_CURL_MULTI | |
38 | static int max_requests = -1; | |
39 | static CURLM *curlm; | |
40 | #endif | |
41 | #ifndef NO_CURL_EASY_DUPHANDLE | |
42 | static CURL *curl_default; | |
43 | #endif | |
44 | ||
45 | #define PREV_BUF_SIZE 4096 | |
46 | ||
47 | char curl_errorstr[CURL_ERROR_SIZE]; | |
48 | ||
49 | static int curl_ssl_verify = -1; | |
50 | static int curl_ssl_try; | |
51 | static const char *curl_http_version = NULL; | |
52 | static const char *ssl_cert; | |
53 | static const char *ssl_cipherlist; | |
54 | static const char *ssl_version; | |
55 | static struct { | |
56 | const char *name; | |
57 | long ssl_version; | |
58 | } sslversions[] = { | |
59 | { "sslv2", CURL_SSLVERSION_SSLv2 }, | |
60 | { "sslv3", CURL_SSLVERSION_SSLv3 }, | |
61 | { "tlsv1", CURL_SSLVERSION_TLSv1 }, | |
62 | #if LIBCURL_VERSION_NUM >= 0x072200 | |
63 | { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 }, | |
64 | { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 }, | |
65 | { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 }, | |
66 | #endif | |
67 | #if LIBCURL_VERSION_NUM >= 0x073400 | |
68 | { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 }, | |
69 | #endif | |
70 | }; | |
71 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
72 | static const char *ssl_key; | |
73 | #endif | |
74 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
75 | static const char *ssl_capath; | |
76 | #endif | |
77 | #if LIBCURL_VERSION_NUM >= 0x071304 | |
78 | static const char *curl_no_proxy; | |
79 | #endif | |
80 | #if LIBCURL_VERSION_NUM >= 0x072c00 | |
81 | static const char *ssl_pinnedkey; | |
82 | #endif | |
83 | static const char *ssl_cainfo; | |
84 | static long curl_low_speed_limit = -1; | |
85 | static long curl_low_speed_time = -1; | |
86 | static int curl_ftp_no_epsv; | |
87 | static const char *curl_http_proxy; | |
88 | static const char *http_proxy_authmethod; | |
89 | static struct { | |
90 | const char *name; | |
91 | long curlauth_param; | |
92 | } proxy_authmethods[] = { | |
93 | { "basic", CURLAUTH_BASIC }, | |
94 | { "digest", CURLAUTH_DIGEST }, | |
95 | { "negotiate", CURLAUTH_GSSNEGOTIATE }, | |
96 | { "ntlm", CURLAUTH_NTLM }, | |
97 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
98 | { "anyauth", CURLAUTH_ANY }, | |
99 | #endif | |
100 | /* | |
101 | * CURLAUTH_DIGEST_IE has no corresponding command-line option in | |
102 | * curl(1) and is not included in CURLAUTH_ANY, so we leave it out | |
103 | * here, too | |
104 | */ | |
105 | }; | |
106 | #ifdef CURLGSSAPI_DELEGATION_FLAG | |
107 | static const char *curl_deleg; | |
108 | static struct { | |
109 | const char *name; | |
110 | long curl_deleg_param; | |
111 | } curl_deleg_levels[] = { | |
112 | { "none", CURLGSSAPI_DELEGATION_NONE }, | |
113 | { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG }, | |
114 | { "always", CURLGSSAPI_DELEGATION_FLAG }, | |
115 | }; | |
116 | #endif | |
117 | ||
118 | static struct credential proxy_auth = CREDENTIAL_INIT; | |
119 | static const char *curl_proxyuserpwd; | |
120 | static const char *curl_cookie_file; | |
121 | static int curl_save_cookies; | |
122 | struct credential http_auth = CREDENTIAL_INIT; | |
123 | static int http_proactive_auth; | |
124 | static const char *user_agent; | |
125 | static int curl_empty_auth = -1; | |
126 | ||
127 | enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL; | |
128 | ||
129 | #if LIBCURL_VERSION_NUM >= 0x071700 | |
130 | /* Use CURLOPT_KEYPASSWD as is */ | |
131 | #elif LIBCURL_VERSION_NUM >= 0x070903 | |
132 | #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD | |
133 | #else | |
134 | #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD | |
135 | #endif | |
136 | ||
137 | static struct credential cert_auth = CREDENTIAL_INIT; | |
138 | static int ssl_cert_password_required; | |
139 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
140 | static unsigned long http_auth_methods = CURLAUTH_ANY; | |
141 | static int http_auth_methods_restricted; | |
142 | /* Modes for which empty_auth cannot actually help us. */ | |
143 | static unsigned long empty_auth_useless = | |
144 | CURLAUTH_BASIC | |
145 | #ifdef CURLAUTH_DIGEST_IE | |
146 | | CURLAUTH_DIGEST_IE | |
147 | #endif | |
148 | | CURLAUTH_DIGEST; | |
149 | #endif | |
150 | ||
151 | static struct curl_slist *pragma_header; | |
152 | static struct curl_slist *no_pragma_header; | |
153 | static struct curl_slist *extra_http_headers; | |
154 | ||
155 | static struct active_request_slot *active_queue_head; | |
156 | ||
157 | static char *cached_accept_language; | |
158 | ||
159 | static char *http_ssl_backend; | |
160 | ||
161 | static int http_schannel_check_revoke = 1; | |
162 | /* | |
163 | * With the backend being set to `schannel`, setting sslCAinfo would override | |
164 | * the Certificate Store in cURL v7.60.0 and later, which is not what we want | |
165 | * by default. | |
166 | */ | |
167 | static int http_schannel_use_ssl_cainfo; | |
168 | ||
169 | size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
170 | { | |
171 | size_t size = eltsize * nmemb; | |
172 | struct buffer *buffer = buffer_; | |
173 | ||
174 | if (size > buffer->buf.len - buffer->posn) | |
175 | size = buffer->buf.len - buffer->posn; | |
176 | memcpy(ptr, buffer->buf.buf + buffer->posn, size); | |
177 | buffer->posn += size; | |
178 | ||
179 | return size / eltsize; | |
180 | } | |
181 | ||
182 | #ifndef NO_CURL_IOCTL | |
183 | curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp) | |
184 | { | |
185 | struct buffer *buffer = clientp; | |
186 | ||
187 | switch (cmd) { | |
188 | case CURLIOCMD_NOP: | |
189 | return CURLIOE_OK; | |
190 | ||
191 | case CURLIOCMD_RESTARTREAD: | |
192 | buffer->posn = 0; | |
193 | return CURLIOE_OK; | |
194 | ||
195 | default: | |
196 | return CURLIOE_UNKNOWNCMD; | |
197 | } | |
198 | } | |
199 | #endif | |
200 | ||
201 | size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) | |
202 | { | |
203 | size_t size = eltsize * nmemb; | |
204 | struct strbuf *buffer = buffer_; | |
205 | ||
206 | strbuf_add(buffer, ptr, size); | |
207 | return nmemb; | |
208 | } | |
209 | ||
210 | size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf) | |
211 | { | |
212 | return nmemb; | |
213 | } | |
214 | ||
215 | static void closedown_active_slot(struct active_request_slot *slot) | |
216 | { | |
217 | active_requests--; | |
218 | slot->in_use = 0; | |
219 | } | |
220 | ||
221 | static void finish_active_slot(struct active_request_slot *slot) | |
222 | { | |
223 | closedown_active_slot(slot); | |
224 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); | |
225 | ||
226 | if (slot->finished != NULL) | |
227 | (*slot->finished) = 1; | |
228 | ||
229 | /* Store slot results so they can be read after the slot is reused */ | |
230 | if (slot->results != NULL) { | |
231 | slot->results->curl_result = slot->curl_result; | |
232 | slot->results->http_code = slot->http_code; | |
233 | #if LIBCURL_VERSION_NUM >= 0x070a08 | |
234 | curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL, | |
235 | &slot->results->auth_avail); | |
236 | #else | |
237 | slot->results->auth_avail = 0; | |
238 | #endif | |
239 | ||
240 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE, | |
241 | &slot->results->http_connectcode); | |
242 | } | |
243 | ||
244 | /* Run callback if appropriate */ | |
245 | if (slot->callback_func != NULL) | |
246 | slot->callback_func(slot->callback_data); | |
247 | } | |
248 | ||
249 | static void xmulti_remove_handle(struct active_request_slot *slot) | |
250 | { | |
251 | #ifdef USE_CURL_MULTI | |
252 | curl_multi_remove_handle(curlm, slot->curl); | |
253 | #endif | |
254 | } | |
255 | ||
256 | #ifdef USE_CURL_MULTI | |
257 | static void process_curl_messages(void) | |
258 | { | |
259 | int num_messages; | |
260 | struct active_request_slot *slot; | |
261 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
262 | ||
263 | while (curl_message != NULL) { | |
264 | if (curl_message->msg == CURLMSG_DONE) { | |
265 | int curl_result = curl_message->data.result; | |
266 | slot = active_queue_head; | |
267 | while (slot != NULL && | |
268 | slot->curl != curl_message->easy_handle) | |
269 | slot = slot->next; | |
270 | if (slot != NULL) { | |
271 | xmulti_remove_handle(slot); | |
272 | slot->curl_result = curl_result; | |
273 | finish_active_slot(slot); | |
274 | } else { | |
275 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
276 | } | |
277 | } else { | |
278 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
279 | (int)curl_message->msg); | |
280 | } | |
281 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
282 | } | |
283 | } | |
284 | #endif | |
285 | ||
286 | static int http_options(const char *var, const char *value, void *cb) | |
287 | { | |
288 | if (!strcmp("http.version", var)) { | |
289 | return git_config_string(&curl_http_version, var, value); | |
290 | } | |
291 | if (!strcmp("http.sslverify", var)) { | |
292 | curl_ssl_verify = git_config_bool(var, value); | |
293 | return 0; | |
294 | } | |
295 | if (!strcmp("http.sslcipherlist", var)) | |
296 | return git_config_string(&ssl_cipherlist, var, value); | |
297 | if (!strcmp("http.sslversion", var)) | |
298 | return git_config_string(&ssl_version, var, value); | |
299 | if (!strcmp("http.sslcert", var)) | |
300 | return git_config_pathname(&ssl_cert, var, value); | |
301 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
302 | if (!strcmp("http.sslkey", var)) | |
303 | return git_config_pathname(&ssl_key, var, value); | |
304 | #endif | |
305 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
306 | if (!strcmp("http.sslcapath", var)) | |
307 | return git_config_pathname(&ssl_capath, var, value); | |
308 | #endif | |
309 | if (!strcmp("http.sslcainfo", var)) | |
310 | return git_config_pathname(&ssl_cainfo, var, value); | |
311 | if (!strcmp("http.sslcertpasswordprotected", var)) { | |
312 | ssl_cert_password_required = git_config_bool(var, value); | |
313 | return 0; | |
314 | } | |
315 | if (!strcmp("http.ssltry", var)) { | |
316 | curl_ssl_try = git_config_bool(var, value); | |
317 | return 0; | |
318 | } | |
319 | if (!strcmp("http.sslbackend", var)) { | |
320 | free(http_ssl_backend); | |
321 | http_ssl_backend = xstrdup_or_null(value); | |
322 | return 0; | |
323 | } | |
324 | ||
325 | if (!strcmp("http.schannelcheckrevoke", var)) { | |
326 | http_schannel_check_revoke = git_config_bool(var, value); | |
327 | return 0; | |
328 | } | |
329 | ||
330 | if (!strcmp("http.schannelusesslcainfo", var)) { | |
331 | http_schannel_use_ssl_cainfo = git_config_bool(var, value); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | if (!strcmp("http.minsessions", var)) { | |
336 | min_curl_sessions = git_config_int(var, value); | |
337 | #ifndef USE_CURL_MULTI | |
338 | if (min_curl_sessions > 1) | |
339 | min_curl_sessions = 1; | |
340 | #endif | |
341 | return 0; | |
342 | } | |
343 | #ifdef USE_CURL_MULTI | |
344 | if (!strcmp("http.maxrequests", var)) { | |
345 | max_requests = git_config_int(var, value); | |
346 | return 0; | |
347 | } | |
348 | #endif | |
349 | if (!strcmp("http.lowspeedlimit", var)) { | |
350 | curl_low_speed_limit = (long)git_config_int(var, value); | |
351 | return 0; | |
352 | } | |
353 | if (!strcmp("http.lowspeedtime", var)) { | |
354 | curl_low_speed_time = (long)git_config_int(var, value); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | if (!strcmp("http.noepsv", var)) { | |
359 | curl_ftp_no_epsv = git_config_bool(var, value); | |
360 | return 0; | |
361 | } | |
362 | if (!strcmp("http.proxy", var)) | |
363 | return git_config_string(&curl_http_proxy, var, value); | |
364 | ||
365 | if (!strcmp("http.proxyauthmethod", var)) | |
366 | return git_config_string(&http_proxy_authmethod, var, value); | |
367 | ||
368 | if (!strcmp("http.cookiefile", var)) | |
369 | return git_config_pathname(&curl_cookie_file, var, value); | |
370 | if (!strcmp("http.savecookies", var)) { | |
371 | curl_save_cookies = git_config_bool(var, value); | |
372 | return 0; | |
373 | } | |
374 | ||
375 | if (!strcmp("http.postbuffer", var)) { | |
376 | http_post_buffer = git_config_ssize_t(var, value); | |
377 | if (http_post_buffer < 0) | |
378 | warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX); | |
379 | if (http_post_buffer < LARGE_PACKET_MAX) | |
380 | http_post_buffer = LARGE_PACKET_MAX; | |
381 | return 0; | |
382 | } | |
383 | ||
384 | if (!strcmp("http.useragent", var)) | |
385 | return git_config_string(&user_agent, var, value); | |
386 | ||
387 | if (!strcmp("http.emptyauth", var)) { | |
388 | if (value && !strcmp("auto", value)) | |
389 | curl_empty_auth = -1; | |
390 | else | |
391 | curl_empty_auth = git_config_bool(var, value); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | if (!strcmp("http.delegation", var)) { | |
396 | #ifdef CURLGSSAPI_DELEGATION_FLAG | |
397 | return git_config_string(&curl_deleg, var, value); | |
398 | #else | |
399 | warning(_("Delegation control is not supported with cURL < 7.22.0")); | |
400 | return 0; | |
401 | #endif | |
402 | } | |
403 | ||
404 | if (!strcmp("http.pinnedpubkey", var)) { | |
405 | #if LIBCURL_VERSION_NUM >= 0x072c00 | |
406 | return git_config_pathname(&ssl_pinnedkey, var, value); | |
407 | #else | |
408 | warning(_("Public key pinning not supported with cURL < 7.44.0")); | |
409 | return 0; | |
410 | #endif | |
411 | } | |
412 | ||
413 | if (!strcmp("http.extraheader", var)) { | |
414 | if (!value) { | |
415 | return config_error_nonbool(var); | |
416 | } else if (!*value) { | |
417 | curl_slist_free_all(extra_http_headers); | |
418 | extra_http_headers = NULL; | |
419 | } else { | |
420 | extra_http_headers = | |
421 | curl_slist_append(extra_http_headers, value); | |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
426 | if (!strcmp("http.followredirects", var)) { | |
427 | if (value && !strcmp(value, "initial")) | |
428 | http_follow_config = HTTP_FOLLOW_INITIAL; | |
429 | else if (git_config_bool(var, value)) | |
430 | http_follow_config = HTTP_FOLLOW_ALWAYS; | |
431 | else | |
432 | http_follow_config = HTTP_FOLLOW_NONE; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | /* Fall back on the default ones */ | |
437 | return git_default_config(var, value, cb); | |
438 | } | |
439 | ||
440 | static int curl_empty_auth_enabled(void) | |
441 | { | |
442 | if (curl_empty_auth >= 0) | |
443 | return curl_empty_auth; | |
444 | ||
445 | #ifndef LIBCURL_CAN_HANDLE_AUTH_ANY | |
446 | /* | |
447 | * Our libcurl is too old to do AUTH_ANY in the first place; | |
448 | * just default to turning the feature off. | |
449 | */ | |
450 | #else | |
451 | /* | |
452 | * In the automatic case, kick in the empty-auth | |
453 | * hack as long as we would potentially try some | |
454 | * method more exotic than "Basic" or "Digest". | |
455 | * | |
456 | * But only do this when this is our second or | |
457 | * subsequent request, as by then we know what | |
458 | * methods are available. | |
459 | */ | |
460 | if (http_auth_methods_restricted && | |
461 | (http_auth_methods & ~empty_auth_useless)) | |
462 | return 1; | |
463 | #endif | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static void init_curl_http_auth(CURL *result) | |
468 | { | |
469 | if (!http_auth.username || !*http_auth.username) { | |
470 | if (curl_empty_auth_enabled()) | |
471 | curl_easy_setopt(result, CURLOPT_USERPWD, ":"); | |
472 | return; | |
473 | } | |
474 | ||
475 | credential_fill(&http_auth); | |
476 | ||
477 | #if LIBCURL_VERSION_NUM >= 0x071301 | |
478 | curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username); | |
479 | curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password); | |
480 | #else | |
481 | { | |
482 | static struct strbuf up = STRBUF_INIT; | |
483 | /* | |
484 | * Note that we assume we only ever have a single set of | |
485 | * credentials in a given program run, so we do not have | |
486 | * to worry about updating this buffer, only setting its | |
487 | * initial value. | |
488 | */ | |
489 | if (!up.len) | |
490 | strbuf_addf(&up, "%s:%s", | |
491 | http_auth.username, http_auth.password); | |
492 | curl_easy_setopt(result, CURLOPT_USERPWD, up.buf); | |
493 | } | |
494 | #endif | |
495 | } | |
496 | ||
497 | /* *var must be free-able */ | |
498 | static void var_override(const char **var, char *value) | |
499 | { | |
500 | if (value) { | |
501 | free((void *)*var); | |
502 | *var = xstrdup(value); | |
503 | } | |
504 | } | |
505 | ||
506 | static void set_proxyauth_name_password(CURL *result) | |
507 | { | |
508 | #if LIBCURL_VERSION_NUM >= 0x071301 | |
509 | curl_easy_setopt(result, CURLOPT_PROXYUSERNAME, | |
510 | proxy_auth.username); | |
511 | curl_easy_setopt(result, CURLOPT_PROXYPASSWORD, | |
512 | proxy_auth.password); | |
513 | #else | |
514 | struct strbuf s = STRBUF_INIT; | |
515 | ||
516 | strbuf_addstr_urlencode(&s, proxy_auth.username, 1); | |
517 | strbuf_addch(&s, ':'); | |
518 | strbuf_addstr_urlencode(&s, proxy_auth.password, 1); | |
519 | curl_proxyuserpwd = strbuf_detach(&s, NULL); | |
520 | curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd); | |
521 | #endif | |
522 | } | |
523 | ||
524 | static void init_curl_proxy_auth(CURL *result) | |
525 | { | |
526 | if (proxy_auth.username) { | |
527 | if (!proxy_auth.password) | |
528 | credential_fill(&proxy_auth); | |
529 | set_proxyauth_name_password(result); | |
530 | } | |
531 | ||
532 | var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD")); | |
533 | ||
534 | #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */ | |
535 | if (http_proxy_authmethod) { | |
536 | int i; | |
537 | for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) { | |
538 | if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) { | |
539 | curl_easy_setopt(result, CURLOPT_PROXYAUTH, | |
540 | proxy_authmethods[i].curlauth_param); | |
541 | break; | |
542 | } | |
543 | } | |
544 | if (i == ARRAY_SIZE(proxy_authmethods)) { | |
545 | warning("unsupported proxy authentication method %s: using anyauth", | |
546 | http_proxy_authmethod); | |
547 | curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); | |
548 | } | |
549 | } | |
550 | else | |
551 | curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); | |
552 | #endif | |
553 | } | |
554 | ||
555 | static int has_cert_password(void) | |
556 | { | |
557 | if (ssl_cert == NULL || ssl_cert_password_required != 1) | |
558 | return 0; | |
559 | if (!cert_auth.password) { | |
560 | cert_auth.protocol = xstrdup("cert"); | |
561 | cert_auth.username = xstrdup(""); | |
562 | cert_auth.path = xstrdup(ssl_cert); | |
563 | credential_fill(&cert_auth); | |
564 | } | |
565 | return 1; | |
566 | } | |
567 | ||
568 | #if LIBCURL_VERSION_NUM >= 0x071900 | |
569 | static void set_curl_keepalive(CURL *c) | |
570 | { | |
571 | curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1); | |
572 | } | |
573 | ||
574 | #elif LIBCURL_VERSION_NUM >= 0x071000 | |
575 | static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type) | |
576 | { | |
577 | int ka = 1; | |
578 | int rc; | |
579 | socklen_t len = (socklen_t)sizeof(ka); | |
580 | ||
581 | if (type != CURLSOCKTYPE_IPCXN) | |
582 | return 0; | |
583 | ||
584 | rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len); | |
585 | if (rc < 0) | |
586 | warning_errno("unable to set SO_KEEPALIVE on socket"); | |
587 | ||
588 | return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */ | |
589 | } | |
590 | ||
591 | static void set_curl_keepalive(CURL *c) | |
592 | { | |
593 | curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback); | |
594 | } | |
595 | ||
596 | #else | |
597 | static void set_curl_keepalive(CURL *c) | |
598 | { | |
599 | /* not supported on older curl versions */ | |
600 | } | |
601 | #endif | |
602 | ||
603 | static void redact_sensitive_header(struct strbuf *header) | |
604 | { | |
605 | const char *sensitive_header; | |
606 | ||
607 | if (skip_prefix(header->buf, "Authorization:", &sensitive_header) || | |
608 | skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header)) { | |
609 | /* The first token is the type, which is OK to log */ | |
610 | while (isspace(*sensitive_header)) | |
611 | sensitive_header++; | |
612 | while (*sensitive_header && !isspace(*sensitive_header)) | |
613 | sensitive_header++; | |
614 | /* Everything else is opaque and possibly sensitive */ | |
615 | strbuf_setlen(header, sensitive_header - header->buf); | |
616 | strbuf_addstr(header, " <redacted>"); | |
617 | } else if (cookies_to_redact.nr && | |
618 | skip_prefix(header->buf, "Cookie:", &sensitive_header)) { | |
619 | struct strbuf redacted_header = STRBUF_INIT; | |
620 | char *cookie; | |
621 | ||
622 | while (isspace(*sensitive_header)) | |
623 | sensitive_header++; | |
624 | ||
625 | /* | |
626 | * The contents of header starting from sensitive_header will | |
627 | * subsequently be overridden, so it is fine to mutate this | |
628 | * string (hence the assignment to "char *"). | |
629 | */ | |
630 | cookie = (char *) sensitive_header; | |
631 | ||
632 | while (cookie) { | |
633 | char *equals; | |
634 | char *semicolon = strstr(cookie, "; "); | |
635 | if (semicolon) | |
636 | *semicolon = 0; | |
637 | equals = strchrnul(cookie, '='); | |
638 | if (!equals) { | |
639 | /* invalid cookie, just append and continue */ | |
640 | strbuf_addstr(&redacted_header, cookie); | |
641 | continue; | |
642 | } | |
643 | *equals = 0; /* temporarily set to NUL for lookup */ | |
644 | if (string_list_lookup(&cookies_to_redact, cookie)) { | |
645 | strbuf_addstr(&redacted_header, cookie); | |
646 | strbuf_addstr(&redacted_header, "=<redacted>"); | |
647 | } else { | |
648 | *equals = '='; | |
649 | strbuf_addstr(&redacted_header, cookie); | |
650 | } | |
651 | if (semicolon) { | |
652 | /* | |
653 | * There are more cookies. (Or, for some | |
654 | * reason, the input string ends in "; ".) | |
655 | */ | |
656 | strbuf_addstr(&redacted_header, "; "); | |
657 | cookie = semicolon + strlen("; "); | |
658 | } else { | |
659 | cookie = NULL; | |
660 | } | |
661 | } | |
662 | ||
663 | strbuf_setlen(header, sensitive_header - header->buf); | |
664 | strbuf_addbuf(header, &redacted_header); | |
665 | } | |
666 | } | |
667 | ||
668 | static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header) | |
669 | { | |
670 | struct strbuf out = STRBUF_INIT; | |
671 | struct strbuf **headers, **header; | |
672 | ||
673 | strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", | |
674 | text, (long)size, (long)size); | |
675 | trace_strbuf(&trace_curl, &out); | |
676 | strbuf_reset(&out); | |
677 | strbuf_add(&out, ptr, size); | |
678 | headers = strbuf_split_max(&out, '\n', 0); | |
679 | ||
680 | for (header = headers; *header; header++) { | |
681 | if (hide_sensitive_header) | |
682 | redact_sensitive_header(*header); | |
683 | strbuf_insert((*header), 0, text, strlen(text)); | |
684 | strbuf_insert((*header), strlen(text), ": ", 2); | |
685 | strbuf_rtrim((*header)); | |
686 | strbuf_addch((*header), '\n'); | |
687 | trace_strbuf(&trace_curl, (*header)); | |
688 | } | |
689 | strbuf_list_free(headers); | |
690 | strbuf_release(&out); | |
691 | } | |
692 | ||
693 | static void curl_dump_data(const char *text, unsigned char *ptr, size_t size) | |
694 | { | |
695 | size_t i; | |
696 | struct strbuf out = STRBUF_INIT; | |
697 | unsigned int width = 60; | |
698 | ||
699 | strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", | |
700 | text, (long)size, (long)size); | |
701 | trace_strbuf(&trace_curl, &out); | |
702 | ||
703 | for (i = 0; i < size; i += width) { | |
704 | size_t w; | |
705 | ||
706 | strbuf_reset(&out); | |
707 | strbuf_addf(&out, "%s: ", text); | |
708 | for (w = 0; (w < width) && (i + w < size); w++) { | |
709 | unsigned char ch = ptr[i + w]; | |
710 | ||
711 | strbuf_addch(&out, | |
712 | (ch >= 0x20) && (ch < 0x80) | |
713 | ? ch : '.'); | |
714 | } | |
715 | strbuf_addch(&out, '\n'); | |
716 | trace_strbuf(&trace_curl, &out); | |
717 | } | |
718 | strbuf_release(&out); | |
719 | } | |
720 | ||
721 | static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp) | |
722 | { | |
723 | const char *text; | |
724 | enum { NO_FILTER = 0, DO_FILTER = 1 }; | |
725 | ||
726 | switch (type) { | |
727 | case CURLINFO_TEXT: | |
728 | trace_printf_key(&trace_curl, "== Info: %s", data); | |
729 | break; | |
730 | case CURLINFO_HEADER_OUT: | |
731 | text = "=> Send header"; | |
732 | curl_dump_header(text, (unsigned char *)data, size, DO_FILTER); | |
733 | break; | |
734 | case CURLINFO_DATA_OUT: | |
735 | if (trace_curl_data) { | |
736 | text = "=> Send data"; | |
737 | curl_dump_data(text, (unsigned char *)data, size); | |
738 | } | |
739 | break; | |
740 | case CURLINFO_SSL_DATA_OUT: | |
741 | if (trace_curl_data) { | |
742 | text = "=> Send SSL data"; | |
743 | curl_dump_data(text, (unsigned char *)data, size); | |
744 | } | |
745 | break; | |
746 | case CURLINFO_HEADER_IN: | |
747 | text = "<= Recv header"; | |
748 | curl_dump_header(text, (unsigned char *)data, size, NO_FILTER); | |
749 | break; | |
750 | case CURLINFO_DATA_IN: | |
751 | if (trace_curl_data) { | |
752 | text = "<= Recv data"; | |
753 | curl_dump_data(text, (unsigned char *)data, size); | |
754 | } | |
755 | break; | |
756 | case CURLINFO_SSL_DATA_IN: | |
757 | if (trace_curl_data) { | |
758 | text = "<= Recv SSL data"; | |
759 | curl_dump_data(text, (unsigned char *)data, size); | |
760 | } | |
761 | break; | |
762 | ||
763 | default: /* we ignore unknown types by default */ | |
764 | return 0; | |
765 | } | |
766 | return 0; | |
767 | } | |
768 | ||
769 | void setup_curl_trace(CURL *handle) | |
770 | { | |
771 | if (!trace_want(&trace_curl)) | |
772 | return; | |
773 | curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); | |
774 | curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace); | |
775 | curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL); | |
776 | } | |
777 | ||
778 | #ifdef CURLPROTO_HTTP | |
779 | static long get_curl_allowed_protocols(int from_user) | |
780 | { | |
781 | long allowed_protocols = 0; | |
782 | ||
783 | if (is_transport_allowed("http", from_user)) | |
784 | allowed_protocols |= CURLPROTO_HTTP; | |
785 | if (is_transport_allowed("https", from_user)) | |
786 | allowed_protocols |= CURLPROTO_HTTPS; | |
787 | if (is_transport_allowed("ftp", from_user)) | |
788 | allowed_protocols |= CURLPROTO_FTP; | |
789 | if (is_transport_allowed("ftps", from_user)) | |
790 | allowed_protocols |= CURLPROTO_FTPS; | |
791 | ||
792 | return allowed_protocols; | |
793 | } | |
794 | #endif | |
795 | ||
796 | #if LIBCURL_VERSION_NUM >=0x072f00 | |
797 | static int get_curl_http_version_opt(const char *version_string, long *opt) | |
798 | { | |
799 | int i; | |
800 | static struct { | |
801 | const char *name; | |
802 | long opt_token; | |
803 | } choice[] = { | |
804 | { "HTTP/1.1", CURL_HTTP_VERSION_1_1 }, | |
805 | { "HTTP/2", CURL_HTTP_VERSION_2 } | |
806 | }; | |
807 | ||
808 | for (i = 0; i < ARRAY_SIZE(choice); i++) { | |
809 | if (!strcmp(version_string, choice[i].name)) { | |
810 | *opt = choice[i].opt_token; | |
811 | return 0; | |
812 | } | |
813 | } | |
814 | ||
815 | warning("unknown value given to http.version: '%s'", version_string); | |
816 | return -1; /* not found */ | |
817 | } | |
818 | ||
819 | #endif | |
820 | ||
821 | static CURL *get_curl_handle(void) | |
822 | { | |
823 | CURL *result = curl_easy_init(); | |
824 | ||
825 | if (!result) | |
826 | die("curl_easy_init failed"); | |
827 | ||
828 | if (!curl_ssl_verify) { | |
829 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0); | |
830 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0); | |
831 | } else { | |
832 | /* Verify authenticity of the peer's certificate */ | |
833 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1); | |
834 | /* The name in the cert must match whom we tried to connect */ | |
835 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2); | |
836 | } | |
837 | ||
838 | #if LIBCURL_VERSION_NUM >= 0x072f00 // 7.47.0 | |
839 | if (curl_http_version) { | |
840 | long opt; | |
841 | if (!get_curl_http_version_opt(curl_http_version, &opt)) { | |
842 | /* Set request use http version */ | |
843 | curl_easy_setopt(result, CURLOPT_HTTP_VERSION, opt); | |
844 | } | |
845 | } | |
846 | #endif | |
847 | ||
848 | #if LIBCURL_VERSION_NUM >= 0x070907 | |
849 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
850 | #endif | |
851 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
852 | curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY); | |
853 | #endif | |
854 | ||
855 | #ifdef CURLGSSAPI_DELEGATION_FLAG | |
856 | if (curl_deleg) { | |
857 | int i; | |
858 | for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) { | |
859 | if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) { | |
860 | curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION, | |
861 | curl_deleg_levels[i].curl_deleg_param); | |
862 | break; | |
863 | } | |
864 | } | |
865 | if (i == ARRAY_SIZE(curl_deleg_levels)) | |
866 | warning("Unknown delegation method '%s': using default", | |
867 | curl_deleg); | |
868 | } | |
869 | #endif | |
870 | ||
871 | if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) && | |
872 | !http_schannel_check_revoke) { | |
873 | #if LIBCURL_VERSION_NUM >= 0x072c00 | |
874 | curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE); | |
875 | #else | |
876 | warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0")); | |
877 | #endif | |
878 | } | |
879 | ||
880 | if (http_proactive_auth) | |
881 | init_curl_http_auth(result); | |
882 | ||
883 | if (getenv("GIT_SSL_VERSION")) | |
884 | ssl_version = getenv("GIT_SSL_VERSION"); | |
885 | if (ssl_version && *ssl_version) { | |
886 | int i; | |
887 | for (i = 0; i < ARRAY_SIZE(sslversions); i++) { | |
888 | if (!strcmp(ssl_version, sslversions[i].name)) { | |
889 | curl_easy_setopt(result, CURLOPT_SSLVERSION, | |
890 | sslversions[i].ssl_version); | |
891 | break; | |
892 | } | |
893 | } | |
894 | if (i == ARRAY_SIZE(sslversions)) | |
895 | warning("unsupported ssl version %s: using default", | |
896 | ssl_version); | |
897 | } | |
898 | ||
899 | if (getenv("GIT_SSL_CIPHER_LIST")) | |
900 | ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST"); | |
901 | if (ssl_cipherlist != NULL && *ssl_cipherlist) | |
902 | curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST, | |
903 | ssl_cipherlist); | |
904 | ||
905 | if (ssl_cert != NULL) | |
906 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
907 | if (has_cert_password()) | |
908 | curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password); | |
909 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
910 | if (ssl_key != NULL) | |
911 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
912 | #endif | |
913 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
914 | if (ssl_capath != NULL) | |
915 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
916 | #endif | |
917 | #if LIBCURL_VERSION_NUM >= 0x072c00 | |
918 | if (ssl_pinnedkey != NULL) | |
919 | curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey); | |
920 | #endif | |
921 | if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) && | |
922 | !http_schannel_use_ssl_cainfo) { | |
923 | curl_easy_setopt(result, CURLOPT_CAINFO, NULL); | |
924 | #if LIBCURL_VERSION_NUM >= 0x073400 | |
925 | curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL); | |
926 | #endif | |
927 | } else if (ssl_cainfo != NULL) | |
928 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
929 | ||
930 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
931 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
932 | curl_low_speed_limit); | |
933 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
934 | curl_low_speed_time); | |
935 | } | |
936 | ||
937 | curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20); | |
938 | #if LIBCURL_VERSION_NUM >= 0x071301 | |
939 | curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL); | |
940 | #elif LIBCURL_VERSION_NUM >= 0x071101 | |
941 | curl_easy_setopt(result, CURLOPT_POST301, 1); | |
942 | #endif | |
943 | #ifdef CURLPROTO_HTTP | |
944 | curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS, | |
945 | get_curl_allowed_protocols(0)); | |
946 | curl_easy_setopt(result, CURLOPT_PROTOCOLS, | |
947 | get_curl_allowed_protocols(-1)); | |
948 | #else | |
949 | warning(_("Protocol restrictions not supported with cURL < 7.19.4")); | |
950 | #endif | |
951 | if (getenv("GIT_CURL_VERBOSE")) | |
952 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1L); | |
953 | setup_curl_trace(result); | |
954 | if (getenv("GIT_TRACE_CURL_NO_DATA")) | |
955 | trace_curl_data = 0; | |
956 | if (getenv("GIT_REDACT_COOKIES")) { | |
957 | string_list_split(&cookies_to_redact, | |
958 | getenv("GIT_REDACT_COOKIES"), ',', -1); | |
959 | string_list_sort(&cookies_to_redact); | |
960 | } | |
961 | ||
962 | curl_easy_setopt(result, CURLOPT_USERAGENT, | |
963 | user_agent ? user_agent : git_user_agent()); | |
964 | ||
965 | if (curl_ftp_no_epsv) | |
966 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
967 | ||
968 | #ifdef CURLOPT_USE_SSL | |
969 | if (curl_ssl_try) | |
970 | curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY); | |
971 | #endif | |
972 | ||
973 | /* | |
974 | * CURL also examines these variables as a fallback; but we need to query | |
975 | * them here in order to decide whether to prompt for missing password (cf. | |
976 | * init_curl_proxy_auth()). | |
977 | * | |
978 | * Unlike many other common environment variables, these are historically | |
979 | * lowercase only. It appears that CURL did not know this and implemented | |
980 | * only uppercase variants, which was later corrected to take both - with | |
981 | * the exception of http_proxy, which is lowercase only also in CURL. As | |
982 | * the lowercase versions are the historical quasi-standard, they take | |
983 | * precedence here, as in CURL. | |
984 | */ | |
985 | if (!curl_http_proxy) { | |
986 | if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) { | |
987 | var_override(&curl_http_proxy, getenv("HTTPS_PROXY")); | |
988 | var_override(&curl_http_proxy, getenv("https_proxy")); | |
989 | } else { | |
990 | var_override(&curl_http_proxy, getenv("http_proxy")); | |
991 | } | |
992 | if (!curl_http_proxy) { | |
993 | var_override(&curl_http_proxy, getenv("ALL_PROXY")); | |
994 | var_override(&curl_http_proxy, getenv("all_proxy")); | |
995 | } | |
996 | } | |
997 | ||
998 | if (curl_http_proxy && curl_http_proxy[0] == '\0') { | |
999 | /* | |
1000 | * Handle case with the empty http.proxy value here to keep | |
1001 | * common code clean. | |
1002 | * NB: empty option disables proxying at all. | |
1003 | */ | |
1004 | curl_easy_setopt(result, CURLOPT_PROXY, ""); | |
1005 | } else if (curl_http_proxy) { | |
1006 | #if LIBCURL_VERSION_NUM >= 0x071800 | |
1007 | if (starts_with(curl_http_proxy, "socks5h")) | |
1008 | curl_easy_setopt(result, | |
1009 | CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME); | |
1010 | else if (starts_with(curl_http_proxy, "socks5")) | |
1011 | curl_easy_setopt(result, | |
1012 | CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); | |
1013 | else if (starts_with(curl_http_proxy, "socks4a")) | |
1014 | curl_easy_setopt(result, | |
1015 | CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A); | |
1016 | else if (starts_with(curl_http_proxy, "socks")) | |
1017 | curl_easy_setopt(result, | |
1018 | CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4); | |
1019 | #endif | |
1020 | #if LIBCURL_VERSION_NUM >= 0x073400 | |
1021 | else if (starts_with(curl_http_proxy, "https")) | |
1022 | curl_easy_setopt(result, | |
1023 | CURLOPT_PROXYTYPE, CURLPROXY_HTTPS); | |
1024 | #endif | |
1025 | if (strstr(curl_http_proxy, "://")) | |
1026 | credential_from_url(&proxy_auth, curl_http_proxy); | |
1027 | else { | |
1028 | struct strbuf url = STRBUF_INIT; | |
1029 | strbuf_addf(&url, "http://%s", curl_http_proxy); | |
1030 | credential_from_url(&proxy_auth, url.buf); | |
1031 | strbuf_release(&url); | |
1032 | } | |
1033 | ||
1034 | if (!proxy_auth.host) | |
1035 | die("Invalid proxy URL '%s'", curl_http_proxy); | |
1036 | ||
1037 | curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host); | |
1038 | #if LIBCURL_VERSION_NUM >= 0x071304 | |
1039 | var_override(&curl_no_proxy, getenv("NO_PROXY")); | |
1040 | var_override(&curl_no_proxy, getenv("no_proxy")); | |
1041 | curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy); | |
1042 | #endif | |
1043 | } | |
1044 | init_curl_proxy_auth(result); | |
1045 | ||
1046 | set_curl_keepalive(result); | |
1047 | ||
1048 | return result; | |
1049 | } | |
1050 | ||
1051 | static void set_from_env(const char **var, const char *envname) | |
1052 | { | |
1053 | const char *val = getenv(envname); | |
1054 | if (val) | |
1055 | *var = val; | |
1056 | } | |
1057 | ||
1058 | void http_init(struct remote *remote, const char *url, int proactive_auth) | |
1059 | { | |
1060 | char *low_speed_limit; | |
1061 | char *low_speed_time; | |
1062 | char *normalized_url; | |
1063 | struct urlmatch_config config = { STRING_LIST_INIT_DUP }; | |
1064 | ||
1065 | config.section = "http"; | |
1066 | config.key = NULL; | |
1067 | config.collect_fn = http_options; | |
1068 | config.cascade_fn = git_default_config; | |
1069 | config.cb = NULL; | |
1070 | ||
1071 | http_is_verbose = 0; | |
1072 | normalized_url = url_normalize(url, &config.url); | |
1073 | ||
1074 | git_config(urlmatch_config_entry, &config); | |
1075 | free(normalized_url); | |
1076 | ||
1077 | #if LIBCURL_VERSION_NUM >= 0x073800 | |
1078 | if (http_ssl_backend) { | |
1079 | const curl_ssl_backend **backends; | |
1080 | struct strbuf buf = STRBUF_INIT; | |
1081 | int i; | |
1082 | ||
1083 | switch (curl_global_sslset(-1, http_ssl_backend, &backends)) { | |
1084 | case CURLSSLSET_UNKNOWN_BACKEND: | |
1085 | strbuf_addf(&buf, _("Unsupported SSL backend '%s'. " | |
1086 | "Supported SSL backends:"), | |
1087 | http_ssl_backend); | |
1088 | for (i = 0; backends[i]; i++) | |
1089 | strbuf_addf(&buf, "\n\t%s", backends[i]->name); | |
1090 | die("%s", buf.buf); | |
1091 | case CURLSSLSET_NO_BACKENDS: | |
1092 | die(_("Could not set SSL backend to '%s': " | |
1093 | "cURL was built without SSL backends"), | |
1094 | http_ssl_backend); | |
1095 | case CURLSSLSET_TOO_LATE: | |
1096 | die(_("Could not set SSL backend to '%s': already set"), | |
1097 | http_ssl_backend); | |
1098 | case CURLSSLSET_OK: | |
1099 | break; /* Okay! */ | |
1100 | } | |
1101 | } | |
1102 | #endif | |
1103 | ||
1104 | if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) | |
1105 | die("curl_global_init failed"); | |
1106 | ||
1107 | http_proactive_auth = proactive_auth; | |
1108 | ||
1109 | if (remote && remote->http_proxy) | |
1110 | curl_http_proxy = xstrdup(remote->http_proxy); | |
1111 | ||
1112 | if (remote) | |
1113 | var_override(&http_proxy_authmethod, remote->http_proxy_authmethod); | |
1114 | ||
1115 | pragma_header = curl_slist_append(http_copy_default_headers(), | |
1116 | "Pragma: no-cache"); | |
1117 | no_pragma_header = curl_slist_append(http_copy_default_headers(), | |
1118 | "Pragma:"); | |
1119 | ||
1120 | #ifdef USE_CURL_MULTI | |
1121 | { | |
1122 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
1123 | if (http_max_requests != NULL) | |
1124 | max_requests = atoi(http_max_requests); | |
1125 | } | |
1126 | ||
1127 | curlm = curl_multi_init(); | |
1128 | if (!curlm) | |
1129 | die("curl_multi_init failed"); | |
1130 | #endif | |
1131 | ||
1132 | if (getenv("GIT_SSL_NO_VERIFY")) | |
1133 | curl_ssl_verify = 0; | |
1134 | ||
1135 | set_from_env(&ssl_cert, "GIT_SSL_CERT"); | |
1136 | #if LIBCURL_VERSION_NUM >= 0x070903 | |
1137 | set_from_env(&ssl_key, "GIT_SSL_KEY"); | |
1138 | #endif | |
1139 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
1140 | set_from_env(&ssl_capath, "GIT_SSL_CAPATH"); | |
1141 | #endif | |
1142 | set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO"); | |
1143 | ||
1144 | set_from_env(&user_agent, "GIT_HTTP_USER_AGENT"); | |
1145 | ||
1146 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
1147 | if (low_speed_limit != NULL) | |
1148 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
1149 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
1150 | if (low_speed_time != NULL) | |
1151 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
1152 | ||
1153 | if (curl_ssl_verify == -1) | |
1154 | curl_ssl_verify = 1; | |
1155 | ||
1156 | curl_session_count = 0; | |
1157 | #ifdef USE_CURL_MULTI | |
1158 | if (max_requests < 1) | |
1159 | max_requests = DEFAULT_MAX_REQUESTS; | |
1160 | #endif | |
1161 | ||
1162 | if (getenv("GIT_CURL_FTP_NO_EPSV")) | |
1163 | curl_ftp_no_epsv = 1; | |
1164 | ||
1165 | if (url) { | |
1166 | credential_from_url(&http_auth, url); | |
1167 | if (!ssl_cert_password_required && | |
1168 | getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") && | |
1169 | starts_with(url, "https://")) | |
1170 | ssl_cert_password_required = 1; | |
1171 | } | |
1172 | ||
1173 | #ifndef NO_CURL_EASY_DUPHANDLE | |
1174 | curl_default = get_curl_handle(); | |
1175 | #endif | |
1176 | } | |
1177 | ||
1178 | void http_cleanup(void) | |
1179 | { | |
1180 | struct active_request_slot *slot = active_queue_head; | |
1181 | ||
1182 | while (slot != NULL) { | |
1183 | struct active_request_slot *next = slot->next; | |
1184 | if (slot->curl != NULL) { | |
1185 | xmulti_remove_handle(slot); | |
1186 | curl_easy_cleanup(slot->curl); | |
1187 | } | |
1188 | free(slot); | |
1189 | slot = next; | |
1190 | } | |
1191 | active_queue_head = NULL; | |
1192 | ||
1193 | #ifndef NO_CURL_EASY_DUPHANDLE | |
1194 | curl_easy_cleanup(curl_default); | |
1195 | #endif | |
1196 | ||
1197 | #ifdef USE_CURL_MULTI | |
1198 | curl_multi_cleanup(curlm); | |
1199 | #endif | |
1200 | curl_global_cleanup(); | |
1201 | ||
1202 | curl_slist_free_all(extra_http_headers); | |
1203 | extra_http_headers = NULL; | |
1204 | ||
1205 | curl_slist_free_all(pragma_header); | |
1206 | pragma_header = NULL; | |
1207 | ||
1208 | curl_slist_free_all(no_pragma_header); | |
1209 | no_pragma_header = NULL; | |
1210 | ||
1211 | if (curl_http_proxy) { | |
1212 | free((void *)curl_http_proxy); | |
1213 | curl_http_proxy = NULL; | |
1214 | } | |
1215 | ||
1216 | if (proxy_auth.password) { | |
1217 | memset(proxy_auth.password, 0, strlen(proxy_auth.password)); | |
1218 | FREE_AND_NULL(proxy_auth.password); | |
1219 | } | |
1220 | ||
1221 | free((void *)curl_proxyuserpwd); | |
1222 | curl_proxyuserpwd = NULL; | |
1223 | ||
1224 | free((void *)http_proxy_authmethod); | |
1225 | http_proxy_authmethod = NULL; | |
1226 | ||
1227 | if (cert_auth.password != NULL) { | |
1228 | memset(cert_auth.password, 0, strlen(cert_auth.password)); | |
1229 | FREE_AND_NULL(cert_auth.password); | |
1230 | } | |
1231 | ssl_cert_password_required = 0; | |
1232 | ||
1233 | FREE_AND_NULL(cached_accept_language); | |
1234 | } | |
1235 | ||
1236 | struct active_request_slot *get_active_slot(void) | |
1237 | { | |
1238 | struct active_request_slot *slot = active_queue_head; | |
1239 | struct active_request_slot *newslot; | |
1240 | ||
1241 | #ifdef USE_CURL_MULTI | |
1242 | int num_transfers; | |
1243 | ||
1244 | /* Wait for a slot to open up if the queue is full */ | |
1245 | while (active_requests >= max_requests) { | |
1246 | curl_multi_perform(curlm, &num_transfers); | |
1247 | if (num_transfers < active_requests) | |
1248 | process_curl_messages(); | |
1249 | } | |
1250 | #endif | |
1251 | ||
1252 | while (slot != NULL && slot->in_use) | |
1253 | slot = slot->next; | |
1254 | ||
1255 | if (slot == NULL) { | |
1256 | newslot = xmalloc(sizeof(*newslot)); | |
1257 | newslot->curl = NULL; | |
1258 | newslot->in_use = 0; | |
1259 | newslot->next = NULL; | |
1260 | ||
1261 | slot = active_queue_head; | |
1262 | if (slot == NULL) { | |
1263 | active_queue_head = newslot; | |
1264 | } else { | |
1265 | while (slot->next != NULL) | |
1266 | slot = slot->next; | |
1267 | slot->next = newslot; | |
1268 | } | |
1269 | slot = newslot; | |
1270 | } | |
1271 | ||
1272 | if (slot->curl == NULL) { | |
1273 | #ifdef NO_CURL_EASY_DUPHANDLE | |
1274 | slot->curl = get_curl_handle(); | |
1275 | #else | |
1276 | slot->curl = curl_easy_duphandle(curl_default); | |
1277 | #endif | |
1278 | curl_session_count++; | |
1279 | } | |
1280 | ||
1281 | active_requests++; | |
1282 | slot->in_use = 1; | |
1283 | slot->results = NULL; | |
1284 | slot->finished = NULL; | |
1285 | slot->callback_data = NULL; | |
1286 | slot->callback_func = NULL; | |
1287 | curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file); | |
1288 | if (curl_save_cookies) | |
1289 | curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file); | |
1290 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); | |
1291 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); | |
1292 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); | |
1293 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
1294 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
1295 | curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL); | |
1296 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
1297 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
1298 | curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1); | |
1299 | curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL); | |
1300 | ||
1301 | /* | |
1302 | * Default following to off unless "ALWAYS" is configured; this gives | |
1303 | * callers a sane starting point, and they can tweak for individual | |
1304 | * HTTP_FOLLOW_* cases themselves. | |
1305 | */ | |
1306 | if (http_follow_config == HTTP_FOLLOW_ALWAYS) | |
1307 | curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); | |
1308 | else | |
1309 | curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0); | |
1310 | ||
1311 | #if LIBCURL_VERSION_NUM >= 0x070a08 | |
1312 | curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve); | |
1313 | #endif | |
1314 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
1315 | curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods); | |
1316 | #endif | |
1317 | if (http_auth.password || curl_empty_auth_enabled()) | |
1318 | init_curl_http_auth(slot->curl); | |
1319 | ||
1320 | return slot; | |
1321 | } | |
1322 | ||
1323 | int start_active_slot(struct active_request_slot *slot) | |
1324 | { | |
1325 | #ifdef USE_CURL_MULTI | |
1326 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
1327 | int num_transfers; | |
1328 | ||
1329 | if (curlm_result != CURLM_OK && | |
1330 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
1331 | warning("curl_multi_add_handle failed: %s", | |
1332 | curl_multi_strerror(curlm_result)); | |
1333 | active_requests--; | |
1334 | slot->in_use = 0; | |
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * We know there must be something to do, since we just added | |
1340 | * something. | |
1341 | */ | |
1342 | curl_multi_perform(curlm, &num_transfers); | |
1343 | #endif | |
1344 | return 1; | |
1345 | } | |
1346 | ||
1347 | #ifdef USE_CURL_MULTI | |
1348 | struct fill_chain { | |
1349 | void *data; | |
1350 | int (*fill)(void *); | |
1351 | struct fill_chain *next; | |
1352 | }; | |
1353 | ||
1354 | static struct fill_chain *fill_cfg; | |
1355 | ||
1356 | void add_fill_function(void *data, int (*fill)(void *)) | |
1357 | { | |
1358 | struct fill_chain *new_fill = xmalloc(sizeof(*new_fill)); | |
1359 | struct fill_chain **linkp = &fill_cfg; | |
1360 | new_fill->data = data; | |
1361 | new_fill->fill = fill; | |
1362 | new_fill->next = NULL; | |
1363 | while (*linkp) | |
1364 | linkp = &(*linkp)->next; | |
1365 | *linkp = new_fill; | |
1366 | } | |
1367 | ||
1368 | void fill_active_slots(void) | |
1369 | { | |
1370 | struct active_request_slot *slot = active_queue_head; | |
1371 | ||
1372 | while (active_requests < max_requests) { | |
1373 | struct fill_chain *fill; | |
1374 | for (fill = fill_cfg; fill; fill = fill->next) | |
1375 | if (fill->fill(fill->data)) | |
1376 | break; | |
1377 | ||
1378 | if (!fill) | |
1379 | break; | |
1380 | } | |
1381 | ||
1382 | while (slot != NULL) { | |
1383 | if (!slot->in_use && slot->curl != NULL | |
1384 | && curl_session_count > min_curl_sessions) { | |
1385 | curl_easy_cleanup(slot->curl); | |
1386 | slot->curl = NULL; | |
1387 | curl_session_count--; | |
1388 | } | |
1389 | slot = slot->next; | |
1390 | } | |
1391 | } | |
1392 | ||
1393 | void step_active_slots(void) | |
1394 | { | |
1395 | int num_transfers; | |
1396 | CURLMcode curlm_result; | |
1397 | ||
1398 | do { | |
1399 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
1400 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
1401 | if (num_transfers < active_requests) { | |
1402 | process_curl_messages(); | |
1403 | fill_active_slots(); | |
1404 | } | |
1405 | } | |
1406 | #endif | |
1407 | ||
1408 | void run_active_slot(struct active_request_slot *slot) | |
1409 | { | |
1410 | #ifdef USE_CURL_MULTI | |
1411 | fd_set readfds; | |
1412 | fd_set writefds; | |
1413 | fd_set excfds; | |
1414 | int max_fd; | |
1415 | struct timeval select_timeout; | |
1416 | int finished = 0; | |
1417 | ||
1418 | slot->finished = &finished; | |
1419 | while (!finished) { | |
1420 | step_active_slots(); | |
1421 | ||
1422 | if (slot->in_use) { | |
1423 | #if LIBCURL_VERSION_NUM >= 0x070f04 | |
1424 | long curl_timeout; | |
1425 | curl_multi_timeout(curlm, &curl_timeout); | |
1426 | if (curl_timeout == 0) { | |
1427 | continue; | |
1428 | } else if (curl_timeout == -1) { | |
1429 | select_timeout.tv_sec = 0; | |
1430 | select_timeout.tv_usec = 50000; | |
1431 | } else { | |
1432 | select_timeout.tv_sec = curl_timeout / 1000; | |
1433 | select_timeout.tv_usec = (curl_timeout % 1000) * 1000; | |
1434 | } | |
1435 | #else | |
1436 | select_timeout.tv_sec = 0; | |
1437 | select_timeout.tv_usec = 50000; | |
1438 | #endif | |
1439 | ||
1440 | max_fd = -1; | |
1441 | FD_ZERO(&readfds); | |
1442 | FD_ZERO(&writefds); | |
1443 | FD_ZERO(&excfds); | |
1444 | curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd); | |
1445 | ||
1446 | /* | |
1447 | * It can happen that curl_multi_timeout returns a pathologically | |
1448 | * long timeout when curl_multi_fdset returns no file descriptors | |
1449 | * to read. See commit message for more details. | |
1450 | */ | |
1451 | if (max_fd < 0 && | |
1452 | (select_timeout.tv_sec > 0 || | |
1453 | select_timeout.tv_usec > 50000)) { | |
1454 | select_timeout.tv_sec = 0; | |
1455 | select_timeout.tv_usec = 50000; | |
1456 | } | |
1457 | ||
1458 | select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout); | |
1459 | } | |
1460 | } | |
1461 | #else | |
1462 | while (slot->in_use) { | |
1463 | slot->curl_result = curl_easy_perform(slot->curl); | |
1464 | finish_active_slot(slot); | |
1465 | } | |
1466 | #endif | |
1467 | } | |
1468 | ||
1469 | static void release_active_slot(struct active_request_slot *slot) | |
1470 | { | |
1471 | closedown_active_slot(slot); | |
1472 | if (slot->curl) { | |
1473 | xmulti_remove_handle(slot); | |
1474 | if (curl_session_count > min_curl_sessions) { | |
1475 | curl_easy_cleanup(slot->curl); | |
1476 | slot->curl = NULL; | |
1477 | curl_session_count--; | |
1478 | } | |
1479 | } | |
1480 | #ifdef USE_CURL_MULTI | |
1481 | fill_active_slots(); | |
1482 | #endif | |
1483 | } | |
1484 | ||
1485 | void finish_all_active_slots(void) | |
1486 | { | |
1487 | struct active_request_slot *slot = active_queue_head; | |
1488 | ||
1489 | while (slot != NULL) | |
1490 | if (slot->in_use) { | |
1491 | run_active_slot(slot); | |
1492 | slot = active_queue_head; | |
1493 | } else { | |
1494 | slot = slot->next; | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | /* Helpers for modifying and creating URLs */ | |
1499 | static inline int needs_quote(int ch) | |
1500 | { | |
1501 | if (((ch >= 'A') && (ch <= 'Z')) | |
1502 | || ((ch >= 'a') && (ch <= 'z')) | |
1503 | || ((ch >= '0') && (ch <= '9')) | |
1504 | || (ch == '/') | |
1505 | || (ch == '-') | |
1506 | || (ch == '.')) | |
1507 | return 0; | |
1508 | return 1; | |
1509 | } | |
1510 | ||
1511 | static char *quote_ref_url(const char *base, const char *ref) | |
1512 | { | |
1513 | struct strbuf buf = STRBUF_INIT; | |
1514 | const char *cp; | |
1515 | int ch; | |
1516 | ||
1517 | end_url_with_slash(&buf, base); | |
1518 | ||
1519 | for (cp = ref; (ch = *cp) != 0; cp++) | |
1520 | if (needs_quote(ch)) | |
1521 | strbuf_addf(&buf, "%%%02x", ch); | |
1522 | else | |
1523 | strbuf_addch(&buf, *cp); | |
1524 | ||
1525 | return strbuf_detach(&buf, NULL); | |
1526 | } | |
1527 | ||
1528 | void append_remote_object_url(struct strbuf *buf, const char *url, | |
1529 | const char *hex, | |
1530 | int only_two_digit_prefix) | |
1531 | { | |
1532 | end_url_with_slash(buf, url); | |
1533 | ||
1534 | strbuf_addf(buf, "objects/%.*s/", 2, hex); | |
1535 | if (!only_two_digit_prefix) | |
1536 | strbuf_addstr(buf, hex + 2); | |
1537 | } | |
1538 | ||
1539 | char *get_remote_object_url(const char *url, const char *hex, | |
1540 | int only_two_digit_prefix) | |
1541 | { | |
1542 | struct strbuf buf = STRBUF_INIT; | |
1543 | append_remote_object_url(&buf, url, hex, only_two_digit_prefix); | |
1544 | return strbuf_detach(&buf, NULL); | |
1545 | } | |
1546 | ||
1547 | void normalize_curl_result(CURLcode *result, long http_code, | |
1548 | char *errorstr, size_t errorlen) | |
1549 | { | |
1550 | /* | |
1551 | * If we see a failing http code with CURLE_OK, we have turned off | |
1552 | * FAILONERROR (to keep the server's custom error response), and should | |
1553 | * translate the code into failure here. | |
1554 | * | |
1555 | * Likewise, if we see a redirect (30x code), that means we turned off | |
1556 | * redirect-following, and we should treat the result as an error. | |
1557 | */ | |
1558 | if (*result == CURLE_OK && http_code >= 300) { | |
1559 | *result = CURLE_HTTP_RETURNED_ERROR; | |
1560 | /* | |
1561 | * Normally curl will already have put the "reason phrase" | |
1562 | * from the server into curl_errorstr; unfortunately without | |
1563 | * FAILONERROR it is lost, so we can give only the numeric | |
1564 | * status code. | |
1565 | */ | |
1566 | xsnprintf(errorstr, errorlen, | |
1567 | "The requested URL returned error: %ld", | |
1568 | http_code); | |
1569 | } | |
1570 | } | |
1571 | ||
1572 | static int handle_curl_result(struct slot_results *results) | |
1573 | { | |
1574 | normalize_curl_result(&results->curl_result, results->http_code, | |
1575 | curl_errorstr, sizeof(curl_errorstr)); | |
1576 | ||
1577 | if (results->curl_result == CURLE_OK) { | |
1578 | credential_approve(&http_auth); | |
1579 | if (proxy_auth.password) | |
1580 | credential_approve(&proxy_auth); | |
1581 | return HTTP_OK; | |
1582 | } else if (missing_target(results)) | |
1583 | return HTTP_MISSING_TARGET; | |
1584 | else if (results->http_code == 401) { | |
1585 | if (http_auth.username && http_auth.password) { | |
1586 | credential_reject(&http_auth); | |
1587 | return HTTP_NOAUTH; | |
1588 | } else { | |
1589 | #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY | |
1590 | http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE; | |
1591 | if (results->auth_avail) { | |
1592 | http_auth_methods &= results->auth_avail; | |
1593 | http_auth_methods_restricted = 1; | |
1594 | } | |
1595 | #endif | |
1596 | return HTTP_REAUTH; | |
1597 | } | |
1598 | } else { | |
1599 | if (results->http_connectcode == 407) | |
1600 | credential_reject(&proxy_auth); | |
1601 | #if LIBCURL_VERSION_NUM >= 0x070c00 | |
1602 | if (!curl_errorstr[0]) | |
1603 | strlcpy(curl_errorstr, | |
1604 | curl_easy_strerror(results->curl_result), | |
1605 | sizeof(curl_errorstr)); | |
1606 | #endif | |
1607 | return HTTP_ERROR; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | int run_one_slot(struct active_request_slot *slot, | |
1612 | struct slot_results *results) | |
1613 | { | |
1614 | slot->results = results; | |
1615 | if (!start_active_slot(slot)) { | |
1616 | xsnprintf(curl_errorstr, sizeof(curl_errorstr), | |
1617 | "failed to start HTTP request"); | |
1618 | return HTTP_START_FAILED; | |
1619 | } | |
1620 | ||
1621 | run_active_slot(slot); | |
1622 | return handle_curl_result(results); | |
1623 | } | |
1624 | ||
1625 | struct curl_slist *http_copy_default_headers(void) | |
1626 | { | |
1627 | struct curl_slist *headers = NULL, *h; | |
1628 | ||
1629 | for (h = extra_http_headers; h; h = h->next) | |
1630 | headers = curl_slist_append(headers, h->data); | |
1631 | ||
1632 | return headers; | |
1633 | } | |
1634 | ||
1635 | static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf) | |
1636 | { | |
1637 | char *ptr; | |
1638 | CURLcode ret; | |
1639 | ||
1640 | strbuf_reset(buf); | |
1641 | ret = curl_easy_getinfo(curl, info, &ptr); | |
1642 | if (!ret && ptr) | |
1643 | strbuf_addstr(buf, ptr); | |
1644 | return ret; | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Check for and extract a content-type parameter. "raw" | |
1649 | * should be positioned at the start of the potential | |
1650 | * parameter, with any whitespace already removed. | |
1651 | * | |
1652 | * "name" is the name of the parameter. The value is appended | |
1653 | * to "out". | |
1654 | */ | |
1655 | static int extract_param(const char *raw, const char *name, | |
1656 | struct strbuf *out) | |
1657 | { | |
1658 | size_t len = strlen(name); | |
1659 | ||
1660 | if (strncasecmp(raw, name, len)) | |
1661 | return -1; | |
1662 | raw += len; | |
1663 | ||
1664 | if (*raw != '=') | |
1665 | return -1; | |
1666 | raw++; | |
1667 | ||
1668 | while (*raw && !isspace(*raw) && *raw != ';') | |
1669 | strbuf_addch(out, *raw++); | |
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * Extract a normalized version of the content type, with any | |
1675 | * spaces suppressed, all letters lowercased, and no trailing ";" | |
1676 | * or parameters. | |
1677 | * | |
1678 | * Note that we will silently remove even invalid whitespace. For | |
1679 | * example, "text / plain" is specifically forbidden by RFC 2616, | |
1680 | * but "text/plain" is the only reasonable output, and this keeps | |
1681 | * our code simple. | |
1682 | * | |
1683 | * If the "charset" argument is not NULL, store the value of any | |
1684 | * charset parameter there. | |
1685 | * | |
1686 | * Example: | |
1687 | * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8" | |
1688 | * "text / plain" -> "text/plain" | |
1689 | */ | |
1690 | static void extract_content_type(struct strbuf *raw, struct strbuf *type, | |
1691 | struct strbuf *charset) | |
1692 | { | |
1693 | const char *p; | |
1694 | ||
1695 | strbuf_reset(type); | |
1696 | strbuf_grow(type, raw->len); | |
1697 | for (p = raw->buf; *p; p++) { | |
1698 | if (isspace(*p)) | |
1699 | continue; | |
1700 | if (*p == ';') { | |
1701 | p++; | |
1702 | break; | |
1703 | } | |
1704 | strbuf_addch(type, tolower(*p)); | |
1705 | } | |
1706 | ||
1707 | if (!charset) | |
1708 | return; | |
1709 | ||
1710 | strbuf_reset(charset); | |
1711 | while (*p) { | |
1712 | while (isspace(*p) || *p == ';') | |
1713 | p++; | |
1714 | if (!extract_param(p, "charset", charset)) | |
1715 | return; | |
1716 | while (*p && !isspace(*p)) | |
1717 | p++; | |
1718 | } | |
1719 | ||
1720 | if (!charset->len && starts_with(type->buf, "text/")) | |
1721 | strbuf_addstr(charset, "ISO-8859-1"); | |
1722 | } | |
1723 | ||
1724 | static void write_accept_language(struct strbuf *buf) | |
1725 | { | |
1726 | /* | |
1727 | * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than | |
1728 | * that, q-value will be smaller than 0.001, the minimum q-value the | |
1729 | * HTTP specification allows. See | |
1730 | * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value. | |
1731 | */ | |
1732 | const int MAX_DECIMAL_PLACES = 3; | |
1733 | const int MAX_LANGUAGE_TAGS = 1000; | |
1734 | const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000; | |
1735 | char **language_tags = NULL; | |
1736 | int num_langs = 0; | |
1737 | const char *s = get_preferred_languages(); | |
1738 | int i; | |
1739 | struct strbuf tag = STRBUF_INIT; | |
1740 | ||
1741 | /* Don't add Accept-Language header if no language is preferred. */ | |
1742 | if (!s) | |
1743 | return; | |
1744 | ||
1745 | /* | |
1746 | * Split the colon-separated string of preferred languages into | |
1747 | * language_tags array. | |
1748 | */ | |
1749 | do { | |
1750 | /* collect language tag */ | |
1751 | for (; *s && (isalnum(*s) || *s == '_'); s++) | |
1752 | strbuf_addch(&tag, *s == '_' ? '-' : *s); | |
1753 | ||
1754 | /* skip .codeset, @modifier and any other unnecessary parts */ | |
1755 | while (*s && *s != ':') | |
1756 | s++; | |
1757 | ||
1758 | if (tag.len) { | |
1759 | num_langs++; | |
1760 | REALLOC_ARRAY(language_tags, num_langs); | |
1761 | language_tags[num_langs - 1] = strbuf_detach(&tag, NULL); | |
1762 | if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */ | |
1763 | break; | |
1764 | } | |
1765 | } while (*s++); | |
1766 | ||
1767 | /* write Accept-Language header into buf */ | |
1768 | if (num_langs) { | |
1769 | int last_buf_len = 0; | |
1770 | int max_q; | |
1771 | int decimal_places; | |
1772 | char q_format[32]; | |
1773 | ||
1774 | /* add '*' */ | |
1775 | REALLOC_ARRAY(language_tags, num_langs + 1); | |
1776 | language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */ | |
1777 | ||
1778 | /* compute decimal_places */ | |
1779 | for (max_q = 1, decimal_places = 0; | |
1780 | max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES; | |
1781 | decimal_places++, max_q *= 10) | |
1782 | ; | |
1783 | ||
1784 | xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places); | |
1785 | ||
1786 | strbuf_addstr(buf, "Accept-Language: "); | |
1787 | ||
1788 | for (i = 0; i < num_langs; i++) { | |
1789 | if (i > 0) | |
1790 | strbuf_addstr(buf, ", "); | |
1791 | ||
1792 | strbuf_addstr(buf, language_tags[i]); | |
1793 | ||
1794 | if (i > 0) | |
1795 | strbuf_addf(buf, q_format, max_q - i); | |
1796 | ||
1797 | if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) { | |
1798 | strbuf_remove(buf, last_buf_len, buf->len - last_buf_len); | |
1799 | break; | |
1800 | } | |
1801 | ||
1802 | last_buf_len = buf->len; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | /* free language tags -- last one is a static '*' */ | |
1807 | for (i = 0; i < num_langs - 1; i++) | |
1808 | free(language_tags[i]); | |
1809 | free(language_tags); | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Get an Accept-Language header which indicates user's preferred languages. | |
1814 | * | |
1815 | * Examples: | |
1816 | * LANGUAGE= -> "" | |
1817 | * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1" | |
1818 | * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1" | |
1819 | * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1" | |
1820 | * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1" | |
1821 | * LANGUAGE= LANG=C -> "" | |
1822 | */ | |
1823 | static const char *get_accept_language(void) | |
1824 | { | |
1825 | if (!cached_accept_language) { | |
1826 | struct strbuf buf = STRBUF_INIT; | |
1827 | write_accept_language(&buf); | |
1828 | if (buf.len > 0) | |
1829 | cached_accept_language = strbuf_detach(&buf, NULL); | |
1830 | } | |
1831 | ||
1832 | return cached_accept_language; | |
1833 | } | |
1834 | ||
1835 | static void http_opt_request_remainder(CURL *curl, off_t pos) | |
1836 | { | |
1837 | char buf[128]; | |
1838 | xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos); | |
1839 | curl_easy_setopt(curl, CURLOPT_RANGE, buf); | |
1840 | } | |
1841 | ||
1842 | /* http_request() targets */ | |
1843 | #define HTTP_REQUEST_STRBUF 0 | |
1844 | #define HTTP_REQUEST_FILE 1 | |
1845 | ||
1846 | static int http_request(const char *url, | |
1847 | void *result, int target, | |
1848 | const struct http_get_options *options) | |
1849 | { | |
1850 | struct active_request_slot *slot; | |
1851 | struct slot_results results; | |
1852 | struct curl_slist *headers = http_copy_default_headers(); | |
1853 | struct strbuf buf = STRBUF_INIT; | |
1854 | const char *accept_language; | |
1855 | int ret; | |
1856 | ||
1857 | slot = get_active_slot(); | |
1858 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
1859 | ||
1860 | if (result == NULL) { | |
1861 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); | |
1862 | } else { | |
1863 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
1864 | curl_easy_setopt(slot->curl, CURLOPT_FILE, result); | |
1865 | ||
1866 | if (target == HTTP_REQUEST_FILE) { | |
1867 | off_t posn = ftello(result); | |
1868 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
1869 | fwrite); | |
1870 | if (posn > 0) | |
1871 | http_opt_request_remainder(slot->curl, posn); | |
1872 | } else | |
1873 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
1874 | fwrite_buffer); | |
1875 | } | |
1876 | ||
1877 | accept_language = get_accept_language(); | |
1878 | ||
1879 | if (accept_language) | |
1880 | headers = curl_slist_append(headers, accept_language); | |
1881 | ||
1882 | strbuf_addstr(&buf, "Pragma:"); | |
1883 | if (options && options->no_cache) | |
1884 | strbuf_addstr(&buf, " no-cache"); | |
1885 | if (options && options->initial_request && | |
1886 | http_follow_config == HTTP_FOLLOW_INITIAL) | |
1887 | curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); | |
1888 | ||
1889 | headers = curl_slist_append(headers, buf.buf); | |
1890 | ||
1891 | /* Add additional headers here */ | |
1892 | if (options && options->extra_headers) { | |
1893 | const struct string_list_item *item; | |
1894 | for_each_string_list_item(item, options->extra_headers) { | |
1895 | headers = curl_slist_append(headers, item->string); | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
1900 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); | |
1901 | curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); | |
1902 | curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); | |
1903 | ||
1904 | ret = run_one_slot(slot, &results); | |
1905 | ||
1906 | if (options && options->content_type) { | |
1907 | struct strbuf raw = STRBUF_INIT; | |
1908 | curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw); | |
1909 | extract_content_type(&raw, options->content_type, | |
1910 | options->charset); | |
1911 | strbuf_release(&raw); | |
1912 | } | |
1913 | ||
1914 | if (options && options->effective_url) | |
1915 | curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL, | |
1916 | options->effective_url); | |
1917 | ||
1918 | curl_slist_free_all(headers); | |
1919 | strbuf_release(&buf); | |
1920 | ||
1921 | return ret; | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * Update the "base" url to a more appropriate value, as deduced by | |
1926 | * redirects seen when requesting a URL starting with "url". | |
1927 | * | |
1928 | * The "asked" parameter is a URL that we asked curl to access, and must begin | |
1929 | * with "base". | |
1930 | * | |
1931 | * The "got" parameter is the URL that curl reported to us as where we ended | |
1932 | * up. | |
1933 | * | |
1934 | * Returns 1 if we updated the base url, 0 otherwise. | |
1935 | * | |
1936 | * Our basic strategy is to compare "base" and "asked" to find the bits | |
1937 | * specific to our request. We then strip those bits off of "got" to yield the | |
1938 | * new base. So for example, if our base is "http://example.com/foo.git", | |
1939 | * and we ask for "http://example.com/foo.git/info/refs", we might end up | |
1940 | * with "https://other.example.com/foo.git/info/refs". We would want the | |
1941 | * new URL to become "https://other.example.com/foo.git". | |
1942 | * | |
1943 | * Note that this assumes a sane redirect scheme. It's entirely possible | |
1944 | * in the example above to end up at a URL that does not even end in | |
1945 | * "info/refs". In such a case we die. There's not much we can do, such a | |
1946 | * scheme is unlikely to represent a real git repository, and failing to | |
1947 | * rewrite the base opens options for malicious redirects to do funny things. | |
1948 | */ | |
1949 | static int update_url_from_redirect(struct strbuf *base, | |
1950 | const char *asked, | |
1951 | const struct strbuf *got) | |
1952 | { | |
1953 | const char *tail; | |
1954 | size_t new_len; | |
1955 | ||
1956 | if (!strcmp(asked, got->buf)) | |
1957 | return 0; | |
1958 | ||
1959 | if (!skip_prefix(asked, base->buf, &tail)) | |
1960 | BUG("update_url_from_redirect: %s is not a superset of %s", | |
1961 | asked, base->buf); | |
1962 | ||
1963 | new_len = got->len; | |
1964 | if (!strip_suffix_mem(got->buf, &new_len, tail)) | |
1965 | die(_("unable to update url base from redirection:\n" | |
1966 | " asked for: %s\n" | |
1967 | " redirect: %s"), | |
1968 | asked, got->buf); | |
1969 | ||
1970 | strbuf_reset(base); | |
1971 | strbuf_add(base, got->buf, new_len); | |
1972 | ||
1973 | return 1; | |
1974 | } | |
1975 | ||
1976 | static int http_request_reauth(const char *url, | |
1977 | void *result, int target, | |
1978 | struct http_get_options *options) | |
1979 | { | |
1980 | int ret = http_request(url, result, target, options); | |
1981 | ||
1982 | if (ret != HTTP_OK && ret != HTTP_REAUTH) | |
1983 | return ret; | |
1984 | ||
1985 | if (options && options->effective_url && options->base_url) { | |
1986 | if (update_url_from_redirect(options->base_url, | |
1987 | url, options->effective_url)) { | |
1988 | credential_from_url(&http_auth, options->base_url->buf); | |
1989 | url = options->effective_url->buf; | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | if (ret != HTTP_REAUTH) | |
1994 | return ret; | |
1995 | ||
1996 | /* | |
1997 | * The previous request may have put cruft into our output stream; we | |
1998 | * should clear it out before making our next request. | |
1999 | */ | |
2000 | switch (target) { | |
2001 | case HTTP_REQUEST_STRBUF: | |
2002 | strbuf_reset(result); | |
2003 | break; | |
2004 | case HTTP_REQUEST_FILE: | |
2005 | if (fflush(result)) { | |
2006 | error_errno("unable to flush a file"); | |
2007 | return HTTP_START_FAILED; | |
2008 | } | |
2009 | rewind(result); | |
2010 | if (ftruncate(fileno(result), 0) < 0) { | |
2011 | error_errno("unable to truncate a file"); | |
2012 | return HTTP_START_FAILED; | |
2013 | } | |
2014 | break; | |
2015 | default: | |
2016 | BUG("Unknown http_request target"); | |
2017 | } | |
2018 | ||
2019 | credential_fill(&http_auth); | |
2020 | ||
2021 | return http_request(url, result, target, options); | |
2022 | } | |
2023 | ||
2024 | int http_get_strbuf(const char *url, | |
2025 | struct strbuf *result, | |
2026 | struct http_get_options *options) | |
2027 | { | |
2028 | return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options); | |
2029 | } | |
2030 | ||
2031 | /* | |
2032 | * Downloads a URL and stores the result in the given file. | |
2033 | * | |
2034 | * If a previous interrupted download is detected (i.e. a previous temporary | |
2035 | * file is still around) the download is resumed. | |
2036 | */ | |
2037 | static int http_get_file(const char *url, const char *filename, | |
2038 | struct http_get_options *options) | |
2039 | { | |
2040 | int ret; | |
2041 | struct strbuf tmpfile = STRBUF_INIT; | |
2042 | FILE *result; | |
2043 | ||
2044 | strbuf_addf(&tmpfile, "%s.temp", filename); | |
2045 | result = fopen(tmpfile.buf, "a"); | |
2046 | if (!result) { | |
2047 | error("Unable to open local file %s", tmpfile.buf); | |
2048 | ret = HTTP_ERROR; | |
2049 | goto cleanup; | |
2050 | } | |
2051 | ||
2052 | ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options); | |
2053 | fclose(result); | |
2054 | ||
2055 | if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename)) | |
2056 | ret = HTTP_ERROR; | |
2057 | cleanup: | |
2058 | strbuf_release(&tmpfile); | |
2059 | return ret; | |
2060 | } | |
2061 | ||
2062 | int http_fetch_ref(const char *base, struct ref *ref) | |
2063 | { | |
2064 | struct http_get_options options = {0}; | |
2065 | char *url; | |
2066 | struct strbuf buffer = STRBUF_INIT; | |
2067 | int ret = -1; | |
2068 | ||
2069 | options.no_cache = 1; | |
2070 | ||
2071 | url = quote_ref_url(base, ref->name); | |
2072 | if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) { | |
2073 | strbuf_rtrim(&buffer); | |
2074 | if (buffer.len == the_hash_algo->hexsz) | |
2075 | ret = get_oid_hex(buffer.buf, &ref->old_oid); | |
2076 | else if (starts_with(buffer.buf, "ref: ")) { | |
2077 | ref->symref = xstrdup(buffer.buf + 5); | |
2078 | ret = 0; | |
2079 | } | |
2080 | } | |
2081 | ||
2082 | strbuf_release(&buffer); | |
2083 | free(url); | |
2084 | return ret; | |
2085 | } | |
2086 | ||
2087 | /* Helpers for fetching packs */ | |
2088 | static char *fetch_pack_index(unsigned char *hash, const char *base_url) | |
2089 | { | |
2090 | char *url, *tmp; | |
2091 | struct strbuf buf = STRBUF_INIT; | |
2092 | ||
2093 | if (http_is_verbose) | |
2094 | fprintf(stderr, "Getting index for pack %s\n", hash_to_hex(hash)); | |
2095 | ||
2096 | end_url_with_slash(&buf, base_url); | |
2097 | strbuf_addf(&buf, "objects/pack/pack-%s.idx", hash_to_hex(hash)); | |
2098 | url = strbuf_detach(&buf, NULL); | |
2099 | ||
2100 | strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(hash)); | |
2101 | tmp = strbuf_detach(&buf, NULL); | |
2102 | ||
2103 | if (http_get_file(url, tmp, NULL) != HTTP_OK) { | |
2104 | error("Unable to get pack index %s", url); | |
2105 | FREE_AND_NULL(tmp); | |
2106 | } | |
2107 | ||
2108 | free(url); | |
2109 | return tmp; | |
2110 | } | |
2111 | ||
2112 | static int fetch_and_setup_pack_index(struct packed_git **packs_head, | |
2113 | unsigned char *sha1, const char *base_url) | |
2114 | { | |
2115 | struct packed_git *new_pack; | |
2116 | char *tmp_idx = NULL; | |
2117 | int ret; | |
2118 | ||
2119 | if (has_pack_index(sha1)) { | |
2120 | new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1)); | |
2121 | if (!new_pack) | |
2122 | return -1; /* parse_pack_index() already issued error message */ | |
2123 | goto add_pack; | |
2124 | } | |
2125 | ||
2126 | tmp_idx = fetch_pack_index(sha1, base_url); | |
2127 | if (!tmp_idx) | |
2128 | return -1; | |
2129 | ||
2130 | new_pack = parse_pack_index(sha1, tmp_idx); | |
2131 | if (!new_pack) { | |
2132 | unlink(tmp_idx); | |
2133 | free(tmp_idx); | |
2134 | ||
2135 | return -1; /* parse_pack_index() already issued error message */ | |
2136 | } | |
2137 | ||
2138 | ret = verify_pack_index(new_pack); | |
2139 | if (!ret) { | |
2140 | close_pack_index(new_pack); | |
2141 | ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1)); | |
2142 | } | |
2143 | free(tmp_idx); | |
2144 | if (ret) | |
2145 | return -1; | |
2146 | ||
2147 | add_pack: | |
2148 | new_pack->next = *packs_head; | |
2149 | *packs_head = new_pack; | |
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | int http_get_info_packs(const char *base_url, struct packed_git **packs_head) | |
2154 | { | |
2155 | struct http_get_options options = {0}; | |
2156 | int ret = 0; | |
2157 | char *url; | |
2158 | const char *data; | |
2159 | struct strbuf buf = STRBUF_INIT; | |
2160 | struct object_id oid; | |
2161 | ||
2162 | end_url_with_slash(&buf, base_url); | |
2163 | strbuf_addstr(&buf, "objects/info/packs"); | |
2164 | url = strbuf_detach(&buf, NULL); | |
2165 | ||
2166 | options.no_cache = 1; | |
2167 | ret = http_get_strbuf(url, &buf, &options); | |
2168 | if (ret != HTTP_OK) | |
2169 | goto cleanup; | |
2170 | ||
2171 | data = buf.buf; | |
2172 | while (*data) { | |
2173 | if (skip_prefix(data, "P pack-", &data) && | |
2174 | !parse_oid_hex(data, &oid, &data) && | |
2175 | skip_prefix(data, ".pack", &data) && | |
2176 | (*data == '\n' || *data == '\0')) { | |
2177 | fetch_and_setup_pack_index(packs_head, oid.hash, base_url); | |
2178 | } else { | |
2179 | data = strchrnul(data, '\n'); | |
2180 | } | |
2181 | if (*data) | |
2182 | data++; /* skip past newline */ | |
2183 | } | |
2184 | ||
2185 | cleanup: | |
2186 | free(url); | |
2187 | return ret; | |
2188 | } | |
2189 | ||
2190 | void release_http_pack_request(struct http_pack_request *preq) | |
2191 | { | |
2192 | if (preq->packfile != NULL) { | |
2193 | fclose(preq->packfile); | |
2194 | preq->packfile = NULL; | |
2195 | } | |
2196 | preq->slot = NULL; | |
2197 | strbuf_release(&preq->tmpfile); | |
2198 | free(preq->url); | |
2199 | free(preq); | |
2200 | } | |
2201 | ||
2202 | int finish_http_pack_request(struct http_pack_request *preq) | |
2203 | { | |
2204 | struct packed_git **lst; | |
2205 | struct packed_git *p = preq->target; | |
2206 | char *tmp_idx; | |
2207 | size_t len; | |
2208 | struct child_process ip = CHILD_PROCESS_INIT; | |
2209 | ||
2210 | close_pack_index(p); | |
2211 | ||
2212 | fclose(preq->packfile); | |
2213 | preq->packfile = NULL; | |
2214 | ||
2215 | lst = preq->lst; | |
2216 | while (*lst != p) | |
2217 | lst = &((*lst)->next); | |
2218 | *lst = (*lst)->next; | |
2219 | ||
2220 | if (!strip_suffix(preq->tmpfile.buf, ".pack.temp", &len)) | |
2221 | BUG("pack tmpfile does not end in .pack.temp?"); | |
2222 | tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile.buf); | |
2223 | ||
2224 | argv_array_push(&ip.args, "index-pack"); | |
2225 | argv_array_pushl(&ip.args, "-o", tmp_idx, NULL); | |
2226 | argv_array_push(&ip.args, preq->tmpfile.buf); | |
2227 | ip.git_cmd = 1; | |
2228 | ip.no_stdin = 1; | |
2229 | ip.no_stdout = 1; | |
2230 | ||
2231 | if (run_command(&ip)) { | |
2232 | unlink(preq->tmpfile.buf); | |
2233 | unlink(tmp_idx); | |
2234 | free(tmp_idx); | |
2235 | return -1; | |
2236 | } | |
2237 | ||
2238 | unlink(sha1_pack_index_name(p->hash)); | |
2239 | ||
2240 | if (finalize_object_file(preq->tmpfile.buf, sha1_pack_name(p->hash)) | |
2241 | || finalize_object_file(tmp_idx, sha1_pack_index_name(p->hash))) { | |
2242 | free(tmp_idx); | |
2243 | return -1; | |
2244 | } | |
2245 | ||
2246 | install_packed_git(the_repository, p); | |
2247 | free(tmp_idx); | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | struct http_pack_request *new_http_pack_request( | |
2252 | struct packed_git *target, const char *base_url) | |
2253 | { | |
2254 | off_t prev_posn = 0; | |
2255 | struct strbuf buf = STRBUF_INIT; | |
2256 | struct http_pack_request *preq; | |
2257 | ||
2258 | preq = xcalloc(1, sizeof(*preq)); | |
2259 | strbuf_init(&preq->tmpfile, 0); | |
2260 | preq->target = target; | |
2261 | ||
2262 | end_url_with_slash(&buf, base_url); | |
2263 | strbuf_addf(&buf, "objects/pack/pack-%s.pack", | |
2264 | hash_to_hex(target->hash)); | |
2265 | preq->url = strbuf_detach(&buf, NULL); | |
2266 | ||
2267 | strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(target->hash)); | |
2268 | preq->packfile = fopen(preq->tmpfile.buf, "a"); | |
2269 | if (!preq->packfile) { | |
2270 | error("Unable to open local file %s for pack", | |
2271 | preq->tmpfile.buf); | |
2272 | goto abort; | |
2273 | } | |
2274 | ||
2275 | preq->slot = get_active_slot(); | |
2276 | curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile); | |
2277 | curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
2278 | curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url); | |
2279 | curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, | |
2280 | no_pragma_header); | |
2281 | ||
2282 | /* | |
2283 | * If there is data present from a previous transfer attempt, | |
2284 | * resume where it left off | |
2285 | */ | |
2286 | prev_posn = ftello(preq->packfile); | |
2287 | if (prev_posn>0) { | |
2288 | if (http_is_verbose) | |
2289 | fprintf(stderr, | |
2290 | "Resuming fetch of pack %s at byte %"PRIuMAX"\n", | |
2291 | hash_to_hex(target->hash), | |
2292 | (uintmax_t)prev_posn); | |
2293 | http_opt_request_remainder(preq->slot->curl, prev_posn); | |
2294 | } | |
2295 | ||
2296 | return preq; | |
2297 | ||
2298 | abort: | |
2299 | strbuf_release(&preq->tmpfile); | |
2300 | free(preq->url); | |
2301 | free(preq); | |
2302 | return NULL; | |
2303 | } | |
2304 | ||
2305 | /* Helpers for fetching objects (loose) */ | |
2306 | static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb, | |
2307 | void *data) | |
2308 | { | |
2309 | unsigned char expn[4096]; | |
2310 | size_t size = eltsize * nmemb; | |
2311 | int posn = 0; | |
2312 | struct http_object_request *freq = data; | |
2313 | struct active_request_slot *slot = freq->slot; | |
2314 | ||
2315 | if (slot) { | |
2316 | CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, | |
2317 | &slot->http_code); | |
2318 | if (c != CURLE_OK) | |
2319 | BUG("curl_easy_getinfo for HTTP code failed: %s", | |
2320 | curl_easy_strerror(c)); | |
2321 | if (slot->http_code >= 300) | |
2322 | return nmemb; | |
2323 | } | |
2324 | ||
2325 | do { | |
2326 | ssize_t retval = xwrite(freq->localfile, | |
2327 | (char *) ptr + posn, size - posn); | |
2328 | if (retval < 0) | |
2329 | return posn / eltsize; | |
2330 | posn += retval; | |
2331 | } while (posn < size); | |
2332 | ||
2333 | freq->stream.avail_in = size; | |
2334 | freq->stream.next_in = (void *)ptr; | |
2335 | do { | |
2336 | freq->stream.next_out = expn; | |
2337 | freq->stream.avail_out = sizeof(expn); | |
2338 | freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH); | |
2339 | the_hash_algo->update_fn(&freq->c, expn, | |
2340 | sizeof(expn) - freq->stream.avail_out); | |
2341 | } while (freq->stream.avail_in && freq->zret == Z_OK); | |
2342 | return nmemb; | |
2343 | } | |
2344 | ||
2345 | struct http_object_request *new_http_object_request(const char *base_url, | |
2346 | const struct object_id *oid) | |
2347 | { | |
2348 | char *hex = oid_to_hex(oid); | |
2349 | struct strbuf filename = STRBUF_INIT; | |
2350 | struct strbuf prevfile = STRBUF_INIT; | |
2351 | int prevlocal; | |
2352 | char prev_buf[PREV_BUF_SIZE]; | |
2353 | ssize_t prev_read = 0; | |
2354 | off_t prev_posn = 0; | |
2355 | struct http_object_request *freq; | |
2356 | ||
2357 | freq = xcalloc(1, sizeof(*freq)); | |
2358 | strbuf_init(&freq->tmpfile, 0); | |
2359 | oidcpy(&freq->oid, oid); | |
2360 | freq->localfile = -1; | |
2361 | ||
2362 | loose_object_path(the_repository, &filename, oid); | |
2363 | strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf); | |
2364 | ||
2365 | strbuf_addf(&prevfile, "%s.prev", filename.buf); | |
2366 | unlink_or_warn(prevfile.buf); | |
2367 | rename(freq->tmpfile.buf, prevfile.buf); | |
2368 | unlink_or_warn(freq->tmpfile.buf); | |
2369 | strbuf_release(&filename); | |
2370 | ||
2371 | if (freq->localfile != -1) | |
2372 | error("fd leakage in start: %d", freq->localfile); | |
2373 | freq->localfile = open(freq->tmpfile.buf, | |
2374 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
2375 | /* | |
2376 | * This could have failed due to the "lazy directory creation"; | |
2377 | * try to mkdir the last path component. | |
2378 | */ | |
2379 | if (freq->localfile < 0 && errno == ENOENT) { | |
2380 | char *dir = strrchr(freq->tmpfile.buf, '/'); | |
2381 | if (dir) { | |
2382 | *dir = 0; | |
2383 | mkdir(freq->tmpfile.buf, 0777); | |
2384 | *dir = '/'; | |
2385 | } | |
2386 | freq->localfile = open(freq->tmpfile.buf, | |
2387 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
2388 | } | |
2389 | ||
2390 | if (freq->localfile < 0) { | |
2391 | error_errno("Couldn't create temporary file %s", | |
2392 | freq->tmpfile.buf); | |
2393 | goto abort; | |
2394 | } | |
2395 | ||
2396 | git_inflate_init(&freq->stream); | |
2397 | ||
2398 | the_hash_algo->init_fn(&freq->c); | |
2399 | ||
2400 | freq->url = get_remote_object_url(base_url, hex, 0); | |
2401 | ||
2402 | /* | |
2403 | * If a previous temp file is present, process what was already | |
2404 | * fetched. | |
2405 | */ | |
2406 | prevlocal = open(prevfile.buf, O_RDONLY); | |
2407 | if (prevlocal != -1) { | |
2408 | do { | |
2409 | prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); | |
2410 | if (prev_read>0) { | |
2411 | if (fwrite_sha1_file(prev_buf, | |
2412 | 1, | |
2413 | prev_read, | |
2414 | freq) == prev_read) { | |
2415 | prev_posn += prev_read; | |
2416 | } else { | |
2417 | prev_read = -1; | |
2418 | } | |
2419 | } | |
2420 | } while (prev_read > 0); | |
2421 | close(prevlocal); | |
2422 | } | |
2423 | unlink_or_warn(prevfile.buf); | |
2424 | strbuf_release(&prevfile); | |
2425 | ||
2426 | /* | |
2427 | * Reset inflate/SHA1 if there was an error reading the previous temp | |
2428 | * file; also rewind to the beginning of the local file. | |
2429 | */ | |
2430 | if (prev_read == -1) { | |
2431 | memset(&freq->stream, 0, sizeof(freq->stream)); | |
2432 | git_inflate_init(&freq->stream); | |
2433 | the_hash_algo->init_fn(&freq->c); | |
2434 | if (prev_posn>0) { | |
2435 | prev_posn = 0; | |
2436 | lseek(freq->localfile, 0, SEEK_SET); | |
2437 | if (ftruncate(freq->localfile, 0) < 0) { | |
2438 | error_errno("Couldn't truncate temporary file %s", | |
2439 | freq->tmpfile.buf); | |
2440 | goto abort; | |
2441 | } | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | freq->slot = get_active_slot(); | |
2446 | ||
2447 | curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); | |
2448 | curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0); | |
2449 | curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); | |
2450 | curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); | |
2451 | curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url); | |
2452 | curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); | |
2453 | ||
2454 | /* | |
2455 | * If we have successfully processed data from a previous fetch | |
2456 | * attempt, only fetch the data we don't already have. | |
2457 | */ | |
2458 | if (prev_posn>0) { | |
2459 | if (http_is_verbose) | |
2460 | fprintf(stderr, | |
2461 | "Resuming fetch of object %s at byte %"PRIuMAX"\n", | |
2462 | hex, (uintmax_t)prev_posn); | |
2463 | http_opt_request_remainder(freq->slot->curl, prev_posn); | |
2464 | } | |
2465 | ||
2466 | return freq; | |
2467 | ||
2468 | abort: | |
2469 | strbuf_release(&prevfile); | |
2470 | free(freq->url); | |
2471 | free(freq); | |
2472 | return NULL; | |
2473 | } | |
2474 | ||
2475 | void process_http_object_request(struct http_object_request *freq) | |
2476 | { | |
2477 | if (freq->slot == NULL) | |
2478 | return; | |
2479 | freq->curl_result = freq->slot->curl_result; | |
2480 | freq->http_code = freq->slot->http_code; | |
2481 | freq->slot = NULL; | |
2482 | } | |
2483 | ||
2484 | int finish_http_object_request(struct http_object_request *freq) | |
2485 | { | |
2486 | struct stat st; | |
2487 | struct strbuf filename = STRBUF_INIT; | |
2488 | ||
2489 | close(freq->localfile); | |
2490 | freq->localfile = -1; | |
2491 | ||
2492 | process_http_object_request(freq); | |
2493 | ||
2494 | if (freq->http_code == 416) { | |
2495 | warning("requested range invalid; we may already have all the data."); | |
2496 | } else if (freq->curl_result != CURLE_OK) { | |
2497 | if (stat(freq->tmpfile.buf, &st) == 0) | |
2498 | if (st.st_size == 0) | |
2499 | unlink_or_warn(freq->tmpfile.buf); | |
2500 | return -1; | |
2501 | } | |
2502 | ||
2503 | git_inflate_end(&freq->stream); | |
2504 | the_hash_algo->final_fn(freq->real_oid.hash, &freq->c); | |
2505 | if (freq->zret != Z_STREAM_END) { | |
2506 | unlink_or_warn(freq->tmpfile.buf); | |
2507 | return -1; | |
2508 | } | |
2509 | if (!oideq(&freq->oid, &freq->real_oid)) { | |
2510 | unlink_or_warn(freq->tmpfile.buf); | |
2511 | return -1; | |
2512 | } | |
2513 | loose_object_path(the_repository, &filename, &freq->oid); | |
2514 | freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf); | |
2515 | strbuf_release(&filename); | |
2516 | ||
2517 | return freq->rename; | |
2518 | } | |
2519 | ||
2520 | void abort_http_object_request(struct http_object_request *freq) | |
2521 | { | |
2522 | unlink_or_warn(freq->tmpfile.buf); | |
2523 | ||
2524 | release_http_object_request(freq); | |
2525 | } | |
2526 | ||
2527 | void release_http_object_request(struct http_object_request *freq) | |
2528 | { | |
2529 | if (freq->localfile != -1) { | |
2530 | close(freq->localfile); | |
2531 | freq->localfile = -1; | |
2532 | } | |
2533 | FREE_AND_NULL(freq->url); | |
2534 | if (freq->slot != NULL) { | |
2535 | freq->slot->callback_func = NULL; | |
2536 | freq->slot->callback_data = NULL; | |
2537 | release_active_slot(freq->slot); | |
2538 | freq->slot = NULL; | |
2539 | } | |
2540 | strbuf_release(&freq->tmpfile); | |
2541 | } |