diff options
Diffstat (limited to 'third_party/git/http.c')
| -rw-r--r-- | third_party/git/http.c | 2605 |
1 files changed, 0 insertions, 2605 deletions
diff --git a/third_party/git/http.c b/third_party/git/http.c deleted file mode 100644 index 8b23a546af..0000000000 --- a/third_party/git/http.c +++ /dev/null @@ -1,2605 +0,0 @@ -#include "git-compat-util.h" -#include "http.h" -#include "config.h" -#include "pack.h" -#include "sideband.h" -#include "run-command.h" -#include "url.h" -#include "urlmatch.h" -#include "credential.h" -#include "version.h" -#include "pkt-line.h" -#include "gettext.h" -#include "transport.h" -#include "packfile.h" -#include "protocol.h" -#include "string-list.h" -#include "object-store.h" - -static struct trace_key trace_curl = TRACE_KEY_INIT(CURL); -static int trace_curl_data = 1; -static int trace_curl_redact = 1; -#if LIBCURL_VERSION_NUM >= 0x070a08 -long int git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER; -#else -long int git_curl_ipresolve; -#endif -int active_requests; -int http_is_verbose; -ssize_t http_post_buffer = 16 * LARGE_PACKET_MAX; - -#if LIBCURL_VERSION_NUM >= 0x070a06 -#define LIBCURL_CAN_HANDLE_AUTH_ANY -#endif - -static int min_curl_sessions = 1; -static int curl_session_count; -#ifdef USE_CURL_MULTI -static int max_requests = -1; -static CURLM *curlm; -#endif -#ifndef NO_CURL_EASY_DUPHANDLE -static CURL *curl_default; -#endif - -#define PREV_BUF_SIZE 4096 - -char curl_errorstr[CURL_ERROR_SIZE]; - -static int curl_ssl_verify = -1; -static int curl_ssl_try; -static const char *curl_http_version = NULL; -static const char *ssl_cert; -static const char *ssl_cipherlist; -static const char *ssl_version; -static struct { - const char *name; - long ssl_version; -} sslversions[] = { - { "sslv2", CURL_SSLVERSION_SSLv2 }, - { "sslv3", CURL_SSLVERSION_SSLv3 }, - { "tlsv1", CURL_SSLVERSION_TLSv1 }, -#if LIBCURL_VERSION_NUM >= 0x072200 - { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 }, - { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 }, - { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 }, -#endif -#if LIBCURL_VERSION_NUM >= 0x073400 - { "tlsv1.3", CURL_SSLVERSION_TLSv1_3 }, -#endif -}; -#if LIBCURL_VERSION_NUM >= 0x070903 -static const char *ssl_key; -#endif -#if LIBCURL_VERSION_NUM >= 0x070908 -static const char *ssl_capath; -#endif -#if LIBCURL_VERSION_NUM >= 0x071304 -static const char *curl_no_proxy; -#endif -#if LIBCURL_VERSION_NUM >= 0x072c00 -static const char *ssl_pinnedkey; -#endif -static const char *ssl_cainfo; -static long curl_low_speed_limit = -1; -static long curl_low_speed_time = -1; -static int curl_ftp_no_epsv; -static const char *curl_http_proxy; -static const char *http_proxy_authmethod; - -static const char *http_proxy_ssl_cert; -static const char *http_proxy_ssl_key; -static const char *http_proxy_ssl_ca_info; -static struct credential proxy_cert_auth = CREDENTIAL_INIT; -static int proxy_ssl_cert_password_required; - -static struct { - const char *name; - long curlauth_param; -} proxy_authmethods[] = { - { "basic", CURLAUTH_BASIC }, - { "digest", CURLAUTH_DIGEST }, - { "negotiate", CURLAUTH_GSSNEGOTIATE }, - { "ntlm", CURLAUTH_NTLM }, -#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY - { "anyauth", CURLAUTH_ANY }, -#endif - /* - * CURLAUTH_DIGEST_IE has no corresponding command-line option in - * curl(1) and is not included in CURLAUTH_ANY, so we leave it out - * here, too - */ -}; -#ifdef CURLGSSAPI_DELEGATION_FLAG -static const char *curl_deleg; -static struct { - const char *name; - long curl_deleg_param; -} curl_deleg_levels[] = { - { "none", CURLGSSAPI_DELEGATION_NONE }, - { "policy", CURLGSSAPI_DELEGATION_POLICY_FLAG }, - { "always", CURLGSSAPI_DELEGATION_FLAG }, -}; -#endif - -static struct credential proxy_auth = CREDENTIAL_INIT; -static const char *curl_proxyuserpwd; -static const char *curl_cookie_file; -static int curl_save_cookies; -struct credential http_auth = CREDENTIAL_INIT; -static int http_proactive_auth; -static const char *user_agent; -static int curl_empty_auth = -1; - -enum http_follow_config http_follow_config = HTTP_FOLLOW_INITIAL; - -#if LIBCURL_VERSION_NUM >= 0x071700 -/* Use CURLOPT_KEYPASSWD as is */ -#elif LIBCURL_VERSION_NUM >= 0x070903 -#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD -#else -#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD -#endif - -static struct credential cert_auth = CREDENTIAL_INIT; -static int ssl_cert_password_required; -#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY -static unsigned long http_auth_methods = CURLAUTH_ANY; -static int http_auth_methods_restricted; -/* Modes for which empty_auth cannot actually help us. */ -static unsigned long empty_auth_useless = - CURLAUTH_BASIC -#ifdef CURLAUTH_DIGEST_IE - | CURLAUTH_DIGEST_IE -#endif - | CURLAUTH_DIGEST; -#endif - -static struct curl_slist *pragma_header; -static struct curl_slist *no_pragma_header; -static struct string_list extra_http_headers = STRING_LIST_INIT_DUP; - -static struct active_request_slot *active_queue_head; - -static char *cached_accept_language; - -static char *http_ssl_backend; - -static int http_schannel_check_revoke = 1; -/* - * With the backend being set to `schannel`, setting sslCAinfo would override - * the Certificate Store in cURL v7.60.0 and later, which is not what we want - * by default. - */ -static int http_schannel_use_ssl_cainfo; - -size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) -{ - size_t size = eltsize * nmemb; - struct buffer *buffer = buffer_; - - if (size > buffer->buf.len - buffer->posn) - size = buffer->buf.len - buffer->posn; - memcpy(ptr, buffer->buf.buf + buffer->posn, size); - buffer->posn += size; - - return size / eltsize; -} - -#ifndef NO_CURL_IOCTL -curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp) -{ - struct buffer *buffer = clientp; - - switch (cmd) { - case CURLIOCMD_NOP: - return CURLIOE_OK; - - case CURLIOCMD_RESTARTREAD: - buffer->posn = 0; - return CURLIOE_OK; - - default: - return CURLIOE_UNKNOWNCMD; - } -} -#endif - -size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_) -{ - size_t size = eltsize * nmemb; - struct strbuf *buffer = buffer_; - - strbuf_add(buffer, ptr, size); - return nmemb; -} - -size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf) -{ - return nmemb; -} - -static void closedown_active_slot(struct active_request_slot *slot) -{ - active_requests--; - slot->in_use = 0; -} - -static void finish_active_slot(struct active_request_slot *slot) -{ - closedown_active_slot(slot); - curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); - - if (slot->finished != NULL) - (*slot->finished) = 1; - - /* Store slot results so they can be read after the slot is reused */ - if (slot->results != NULL) { - slot->results->curl_result = slot->curl_result; - slot->results->http_code = slot->http_code; -#if LIBCURL_VERSION_NUM >= 0x070a08 - curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL, - &slot->results->auth_avail); -#else - slot->results->auth_avail = 0; -#endif - - curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE, - &slot->results->http_connectcode); - } - - /* Run callback if appropriate */ - if (slot->callback_func != NULL) - slot->callback_func(slot->callback_data); -} - -static void xmulti_remove_handle(struct active_request_slot *slot) -{ -#ifdef USE_CURL_MULTI - curl_multi_remove_handle(curlm, slot->curl); -#endif -} - -#ifdef USE_CURL_MULTI -static void process_curl_messages(void) -{ - int num_messages; - struct active_request_slot *slot; - CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); - - while (curl_message != NULL) { - if (curl_message->msg == CURLMSG_DONE) { - int curl_result = curl_message->data.result; - slot = active_queue_head; - while (slot != NULL && - slot->curl != curl_message->easy_handle) - slot = slot->next; - if (slot != NULL) { - xmulti_remove_handle(slot); - slot->curl_result = curl_result; - finish_active_slot(slot); - } else { - fprintf(stderr, "Received DONE message for unknown request!\n"); - } - } else { - fprintf(stderr, "Unknown CURL message received: %d\n", - (int)curl_message->msg); - } - curl_message = curl_multi_info_read(curlm, &num_messages); - } -} -#endif - -static int http_options(const char *var, const char *value, void *cb) -{ - if (!strcmp("http.version", var)) { - return git_config_string(&curl_http_version, var, value); - } - if (!strcmp("http.sslverify", var)) { - curl_ssl_verify = git_config_bool(var, value); - return 0; - } - if (!strcmp("http.sslcipherlist", var)) - return git_config_string(&ssl_cipherlist, var, value); - if (!strcmp("http.sslversion", var)) - return git_config_string(&ssl_version, var, value); - if (!strcmp("http.sslcert", var)) - return git_config_pathname(&ssl_cert, var, value); -#if LIBCURL_VERSION_NUM >= 0x070903 - if (!strcmp("http.sslkey", var)) - return git_config_pathname(&ssl_key, var, value); -#endif -#if LIBCURL_VERSION_NUM >= 0x070908 - if (!strcmp("http.sslcapath", var)) - return git_config_pathname(&ssl_capath, var, value); -#endif - if (!strcmp("http.sslcainfo", var)) - return git_config_pathname(&ssl_cainfo, var, value); - if (!strcmp("http.sslcertpasswordprotected", var)) { - ssl_cert_password_required = git_config_bool(var, value); - return 0; - } - if (!strcmp("http.ssltry", var)) { - curl_ssl_try = git_config_bool(var, value); - return 0; - } - if (!strcmp("http.sslbackend", var)) { - free(http_ssl_backend); - http_ssl_backend = xstrdup_or_null(value); - return 0; - } - - if (!strcmp("http.schannelcheckrevoke", var)) { - http_schannel_check_revoke = git_config_bool(var, value); - return 0; - } - - if (!strcmp("http.schannelusesslcainfo", var)) { - http_schannel_use_ssl_cainfo = git_config_bool(var, value); - return 0; - } - - if (!strcmp("http.minsessions", var)) { - min_curl_sessions = git_config_int(var, value); -#ifndef USE_CURL_MULTI - if (min_curl_sessions > 1) - min_curl_sessions = 1; -#endif - return 0; - } -#ifdef USE_CURL_MULTI - if (!strcmp("http.maxrequests", var)) { - max_requests = git_config_int(var, value); - return 0; - } -#endif - if (!strcmp("http.lowspeedlimit", var)) { - curl_low_speed_limit = (long)git_config_int(var, value); - return 0; - } - if (!strcmp("http.lowspeedtime", var)) { - curl_low_speed_time = (long)git_config_int(var, value); - return 0; - } - - if (!strcmp("http.noepsv", var)) { - curl_ftp_no_epsv = git_config_bool(var, value); - return 0; - } - if (!strcmp("http.proxy", var)) - return git_config_string(&curl_http_proxy, var, value); - - if (!strcmp("http.proxyauthmethod", var)) - return git_config_string(&http_proxy_authmethod, var, value); - - if (!strcmp("http.proxysslcert", var)) - return git_config_string(&http_proxy_ssl_cert, var, value); - - if (!strcmp("http.proxysslkey", var)) - return git_config_string(&http_proxy_ssl_key, var, value); - - if (!strcmp("http.proxysslcainfo", var)) - return git_config_string(&http_proxy_ssl_ca_info, var, value); - - if (!strcmp("http.proxysslcertpasswordprotected", var)) { - proxy_ssl_cert_password_required = git_config_bool(var, value); - return 0; - } - - if (!strcmp("http.cookiefile", var)) - return git_config_pathname(&curl_cookie_file, var, value); - if (!strcmp("http.savecookies", var)) { - curl_save_cookies = git_config_bool(var, value); - return 0; - } - - if (!strcmp("http.postbuffer", var)) { - http_post_buffer = git_config_ssize_t(var, value); - if (http_post_buffer < 0) - warning(_("negative value for http.postbuffer; defaulting to %d"), LARGE_PACKET_MAX); - if (http_post_buffer < LARGE_PACKET_MAX) - http_post_buffer = LARGE_PACKET_MAX; - return 0; - } - - if (!strcmp("http.useragent", var)) - return git_config_string(&user_agent, var, value); - - if (!strcmp("http.emptyauth", var)) { - if (value && !strcmp("auto", value)) - curl_empty_auth = -1; - else - curl_empty_auth = git_config_bool(var, value); - return 0; - } - - if (!strcmp("http.delegation", var)) { -#ifdef CURLGSSAPI_DELEGATION_FLAG - return git_config_string(&curl_deleg, var, value); -#else - warning(_("Delegation control is not supported with cURL < 7.22.0")); - return 0; -#endif - } - - if (!strcmp("http.pinnedpubkey", var)) { -#if LIBCURL_VERSION_NUM >= 0x072c00 - return git_config_pathname(&ssl_pinnedkey, var, value); -#else - warning(_("Public key pinning not supported with cURL < 7.44.0")); - return 0; -#endif - } - - if (!strcmp("http.extraheader", var)) { - if (!value) { - return config_error_nonbool(var); - } else if (!*value) { - string_list_clear(&extra_http_headers, 0); - } else { - string_list_append(&extra_http_headers, value); - } - return 0; - } - - if (!strcmp("http.followredirects", var)) { - if (value && !strcmp(value, "initial")) - http_follow_config = HTTP_FOLLOW_INITIAL; - else if (git_config_bool(var, value)) - http_follow_config = HTTP_FOLLOW_ALWAYS; - else - http_follow_config = HTTP_FOLLOW_NONE; - return 0; - } - - /* Fall back on the default ones */ - return git_default_config(var, value, cb); -} - -static int curl_empty_auth_enabled(void) -{ - if (curl_empty_auth >= 0) - return curl_empty_auth; - -#ifndef LIBCURL_CAN_HANDLE_AUTH_ANY - /* - * Our libcurl is too old to do AUTH_ANY in the first place; - * just default to turning the feature off. - */ -#else - /* - * In the automatic case, kick in the empty-auth - * hack as long as we would potentially try some - * method more exotic than "Basic" or "Digest". - * - * But only do this when this is our second or - * subsequent request, as by then we know what - * methods are available. - */ - if (http_auth_methods_restricted && - (http_auth_methods & ~empty_auth_useless)) - return 1; -#endif - return 0; -} - -static void init_curl_http_auth(CURL *result) -{ - if (!http_auth.username || !*http_auth.username) { - if (curl_empty_auth_enabled()) - curl_easy_setopt(result, CURLOPT_USERPWD, ":"); - return; - } - - credential_fill(&http_auth); - -#if LIBCURL_VERSION_NUM >= 0x071301 - curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username); - curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password); -#else - { - static struct strbuf up = STRBUF_INIT; - /* - * Note that we assume we only ever have a single set of - * credentials in a given program run, so we do not have - * to worry about updating this buffer, only setting its - * initial value. - */ - if (!up.len) - strbuf_addf(&up, "%s:%s", - http_auth.username, http_auth.password); - curl_easy_setopt(result, CURLOPT_USERPWD, up.buf); - } -#endif -} - -/* *var must be free-able */ -static void var_override(const char **var, char *value) -{ - if (value) { - free((void *)*var); - *var = xstrdup(value); - } -} - -static void set_proxyauth_name_password(CURL *result) -{ -#if LIBCURL_VERSION_NUM >= 0x071301 - curl_easy_setopt(result, CURLOPT_PROXYUSERNAME, - proxy_auth.username); - curl_easy_setopt(result, CURLOPT_PROXYPASSWORD, - proxy_auth.password); -#else - struct strbuf s = STRBUF_INIT; - - strbuf_addstr_urlencode(&s, proxy_auth.username, - is_rfc3986_unreserved); - strbuf_addch(&s, ':'); - strbuf_addstr_urlencode(&s, proxy_auth.password, - is_rfc3986_unreserved); - curl_proxyuserpwd = strbuf_detach(&s, NULL); - curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd); -#endif -} - -static void init_curl_proxy_auth(CURL *result) -{ - if (proxy_auth.username) { - if (!proxy_auth.password) - credential_fill(&proxy_auth); - set_proxyauth_name_password(result); - } - - var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD")); - -#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */ - if (http_proxy_authmethod) { - int i; - for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) { - if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) { - curl_easy_setopt(result, CURLOPT_PROXYAUTH, - proxy_authmethods[i].curlauth_param); - break; - } - } - if (i == ARRAY_SIZE(proxy_authmethods)) { - warning("unsupported proxy authentication method %s: using anyauth", - http_proxy_authmethod); - curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); - } - } - else - curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY); -#endif -} - -static int has_cert_password(void) -{ - if (ssl_cert == NULL || ssl_cert_password_required != 1) - return 0; - if (!cert_auth.password) { - cert_auth.protocol = xstrdup("cert"); - cert_auth.host = xstrdup(""); - cert_auth.username = xstrdup(""); - cert_auth.path = xstrdup(ssl_cert); - credential_fill(&cert_auth); - } - return 1; -} - -#if LIBCURL_VERSION_NUM >= 0x073400 -static int has_proxy_cert_password(void) -{ - if (http_proxy_ssl_cert == NULL || proxy_ssl_cert_password_required != 1) - return 0; - if (!proxy_cert_auth.password) { - proxy_cert_auth.protocol = xstrdup("cert"); - proxy_cert_auth.host = xstrdup(""); - proxy_cert_auth.username = xstrdup(""); - proxy_cert_auth.path = xstrdup(http_proxy_ssl_cert); - credential_fill(&proxy_cert_auth); - } - return 1; -} -#endif - -#if LIBCURL_VERSION_NUM >= 0x071900 -static void set_curl_keepalive(CURL *c) -{ - curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1); -} - -#elif LIBCURL_VERSION_NUM >= 0x071000 -static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type) -{ - int ka = 1; - int rc; - socklen_t len = (socklen_t)sizeof(ka); - - if (type != CURLSOCKTYPE_IPCXN) - return 0; - - rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len); - if (rc < 0) - warning_errno("unable to set SO_KEEPALIVE on socket"); - - return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */ -} - -static void set_curl_keepalive(CURL *c) -{ - curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback); -} - -#else -static void set_curl_keepalive(CURL *c) -{ - /* not supported on older curl versions */ -} -#endif - -static void redact_sensitive_header(struct strbuf *header) -{ - const char *sensitive_header; - - if (trace_curl_redact && - (skip_prefix(header->buf, "Authorization:", &sensitive_header) || - skip_prefix(header->buf, "Proxy-Authorization:", &sensitive_header))) { - /* The first token is the type, which is OK to log */ - while (isspace(*sensitive_header)) - sensitive_header++; - while (*sensitive_header && !isspace(*sensitive_header)) - sensitive_header++; - /* Everything else is opaque and possibly sensitive */ - strbuf_setlen(header, sensitive_header - header->buf); - strbuf_addstr(header, " <redacted>"); - } else if (trace_curl_redact && - skip_prefix(header->buf, "Cookie:", &sensitive_header)) { - struct strbuf redacted_header = STRBUF_INIT; - const char *cookie; - - while (isspace(*sensitive_header)) - sensitive_header++; - - cookie = sensitive_header; - - while (cookie) { - char *equals; - char *semicolon = strstr(cookie, "; "); - if (semicolon) - *semicolon = 0; - equals = strchrnul(cookie, '='); - if (!equals) { - /* invalid cookie, just append and continue */ - strbuf_addstr(&redacted_header, cookie); - continue; - } - strbuf_add(&redacted_header, cookie, equals - cookie); - strbuf_addstr(&redacted_header, "=<redacted>"); - if (semicolon) { - /* - * There are more cookies. (Or, for some - * reason, the input string ends in "; ".) - */ - strbuf_addstr(&redacted_header, "; "); - cookie = semicolon + strlen("; "); - } else { - cookie = NULL; - } - } - - strbuf_setlen(header, sensitive_header - header->buf); - strbuf_addbuf(header, &redacted_header); - } -} - -static void curl_dump_header(const char *text, unsigned char *ptr, size_t size, int hide_sensitive_header) -{ - struct strbuf out = STRBUF_INIT; - struct strbuf **headers, **header; - - strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", - text, (long)size, (long)size); - trace_strbuf(&trace_curl, &out); - strbuf_reset(&out); - strbuf_add(&out, ptr, size); - headers = strbuf_split_max(&out, '\n', 0); - - for (header = headers; *header; header++) { - if (hide_sensitive_header) - redact_sensitive_header(*header); - strbuf_insertstr((*header), 0, text); - strbuf_insertstr((*header), strlen(text), ": "); - strbuf_rtrim((*header)); - strbuf_addch((*header), '\n'); - trace_strbuf(&trace_curl, (*header)); - } - strbuf_list_free(headers); - strbuf_release(&out); -} - -static void curl_dump_data(const char *text, unsigned char *ptr, size_t size) -{ - size_t i; - struct strbuf out = STRBUF_INIT; - unsigned int width = 60; - - strbuf_addf(&out, "%s, %10.10ld bytes (0x%8.8lx)\n", - text, (long)size, (long)size); - trace_strbuf(&trace_curl, &out); - - for (i = 0; i < size; i += width) { - size_t w; - - strbuf_reset(&out); - strbuf_addf(&out, "%s: ", text); - for (w = 0; (w < width) && (i + w < size); w++) { - unsigned char ch = ptr[i + w]; - - strbuf_addch(&out, - (ch >= 0x20) && (ch < 0x80) - ? ch : '.'); - } - strbuf_addch(&out, '\n'); - trace_strbuf(&trace_curl, &out); - } - strbuf_release(&out); -} - -static int curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp) -{ - const char *text; - enum { NO_FILTER = 0, DO_FILTER = 1 }; - - switch (type) { - case CURLINFO_TEXT: - trace_printf_key(&trace_curl, "== Info: %s", data); - break; - case CURLINFO_HEADER_OUT: - text = "=> Send header"; - curl_dump_header(text, (unsigned char *)data, size, DO_FILTER); - break; - case CURLINFO_DATA_OUT: - if (trace_curl_data) { - text = "=> Send data"; - curl_dump_data(text, (unsigned char *)data, size); - } - break; - case CURLINFO_SSL_DATA_OUT: - if (trace_curl_data) { - text = "=> Send SSL data"; - curl_dump_data(text, (unsigned char *)data, size); - } - break; - case CURLINFO_HEADER_IN: - text = "<= Recv header"; - curl_dump_header(text, (unsigned char *)data, size, NO_FILTER); - break; - case CURLINFO_DATA_IN: - if (trace_curl_data) { - text = "<= Recv data"; - curl_dump_data(text, (unsigned char *)data, size); - } - break; - case CURLINFO_SSL_DATA_IN: - if (trace_curl_data) { - text = "<= Recv SSL data"; - curl_dump_data(text, (unsigned char *)data, size); - } - break; - - default: /* we ignore unknown types by default */ - return 0; - } - return 0; -} - -void http_trace_curl_no_data(void) -{ - trace_override_envvar(&trace_curl, "1"); - trace_curl_data = 0; -} - -void setup_curl_trace(CURL *handle) -{ - if (!trace_want(&trace_curl)) - return; - curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); - curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace); - curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL); -} - -#ifdef CURLPROTO_HTTP -static long get_curl_allowed_protocols(int from_user) -{ - long allowed_protocols = 0; - - if (is_transport_allowed("http", from_user)) - allowed_protocols |= CURLPROTO_HTTP; - if (is_transport_allowed("https", from_user)) - allowed_protocols |= CURLPROTO_HTTPS; - if (is_transport_allowed("ftp", from_user)) - allowed_protocols |= CURLPROTO_FTP; - if (is_transport_allowed("ftps", from_user)) - allowed_protocols |= CURLPROTO_FTPS; - - return allowed_protocols; -} -#endif - -#if LIBCURL_VERSION_NUM >=0x072f00 -static int get_curl_http_version_opt(const char *version_string, long *opt) -{ - int i; - static struct { - const char *name; - long opt_token; - } choice[] = { - { "HTTP/1.1", CURL_HTTP_VERSION_1_1 }, - { "HTTP/2", CURL_HTTP_VERSION_2 } - }; - - for (i = 0; i < ARRAY_SIZE(choice); i++) { - if (!strcmp(version_string, choice[i].name)) { - *opt = choice[i].opt_token; - return 0; - } - } - - warning("unknown value given to http.version: '%s'", version_string); - return -1; /* not found */ -} - -#endif - -static CURL *get_curl_handle(void) -{ - CURL *result = curl_easy_init(); - - if (!result) - die("curl_easy_init failed"); - - if (!curl_ssl_verify) { - curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0); - curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0); - } else { - /* Verify authenticity of the peer's certificate */ - curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1); - /* The name in the cert must match whom we tried to connect */ - curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2); - } - -#if LIBCURL_VERSION_NUM >= 0x072f00 // 7.47.0 - if (curl_http_version) { - long opt; - if (!get_curl_http_version_opt(curl_http_version, &opt)) { - /* Set request use http version */ - curl_easy_setopt(result, CURLOPT_HTTP_VERSION, opt); - } - } -#endif - -#if LIBCURL_VERSION_NUM >= 0x070907 - curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); -#endif -#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY - curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY); -#endif - -#ifdef CURLGSSAPI_DELEGATION_FLAG - if (curl_deleg) { - int i; - for (i = 0; i < ARRAY_SIZE(curl_deleg_levels); i++) { - if (!strcmp(curl_deleg, curl_deleg_levels[i].name)) { - curl_easy_setopt(result, CURLOPT_GSSAPI_DELEGATION, - curl_deleg_levels[i].curl_deleg_param); - break; - } - } - if (i == ARRAY_SIZE(curl_deleg_levels)) - warning("Unknown delegation method '%s': using default", - curl_deleg); - } -#endif - - if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) && - !http_schannel_check_revoke) { -#if LIBCURL_VERSION_NUM >= 0x072c00 - curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE); -#else - warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0")); -#endif - } - - if (http_proactive_auth) - init_curl_http_auth(result); - - if (getenv("GIT_SSL_VERSION")) - ssl_version = getenv("GIT_SSL_VERSION"); - if (ssl_version && *ssl_version) { - int i; - for (i = 0; i < ARRAY_SIZE(sslversions); i++) { - if (!strcmp(ssl_version, sslversions[i].name)) { - curl_easy_setopt(result, CURLOPT_SSLVERSION, - sslversions[i].ssl_version); - break; - } - } - if (i == ARRAY_SIZE(sslversions)) - warning("unsupported ssl version %s: using default", - ssl_version); - } - - if (getenv("GIT_SSL_CIPHER_LIST")) - ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST"); - if (ssl_cipherlist != NULL && *ssl_cipherlist) - curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST, - ssl_cipherlist); - - if (ssl_cert != NULL) - curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); - if (has_cert_password()) - curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password); -#if LIBCURL_VERSION_NUM >= 0x070903 - if (ssl_key != NULL) - curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); -#endif -#if LIBCURL_VERSION_NUM >= 0x070908 - if (ssl_capath != NULL) - curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); -#endif -#if LIBCURL_VERSION_NUM >= 0x072c00 - if (ssl_pinnedkey != NULL) - curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey); -#endif - if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) && - !http_schannel_use_ssl_cainfo) { - curl_easy_setopt(result, CURLOPT_CAINFO, NULL); -#if LIBCURL_VERSION_NUM >= 0x073400 - curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, NULL); -#endif - } else if (ssl_cainfo != NULL || http_proxy_ssl_ca_info != NULL) { - if (ssl_cainfo != NULL) - curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); -#if LIBCURL_VERSION_NUM >= 0x073400 - if (http_proxy_ssl_ca_info != NULL) - curl_easy_setopt(result, CURLOPT_PROXY_CAINFO, http_proxy_ssl_ca_info); -#endif - } - - if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { - curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, - curl_low_speed_limit); - curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, - curl_low_speed_time); - } - - curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20); -#if LIBCURL_VERSION_NUM >= 0x071301 - curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL); -#elif LIBCURL_VERSION_NUM >= 0x071101 - curl_easy_setopt(result, CURLOPT_POST301, 1); -#endif -#ifdef CURLPROTO_HTTP - curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS, - get_curl_allowed_protocols(0)); - curl_easy_setopt(result, CURLOPT_PROTOCOLS, - get_curl_allowed_protocols(-1)); -#else - warning(_("Protocol restrictions not supported with cURL < 7.19.4")); -#endif - if (getenv("GIT_CURL_VERBOSE")) - http_trace_curl_no_data(); - setup_curl_trace(result); - if (getenv("GIT_TRACE_CURL_NO_DATA")) - trace_curl_data = 0; - if (!git_env_bool("GIT_TRACE_REDACT", 1)) - trace_curl_redact = 0; - - curl_easy_setopt(result, CURLOPT_USERAGENT, - user_agent ? user_agent : git_user_agent()); - - if (curl_ftp_no_epsv) - curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); - -#ifdef CURLOPT_USE_SSL - if (curl_ssl_try) - curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY); -#endif - - /* - * CURL also examines these variables as a fallback; but we need to query - * them here in order to decide whether to prompt for missing password (cf. - * init_curl_proxy_auth()). - * - * Unlike many other common environment variables, these are historically - * lowercase only. It appears that CURL did not know this and implemented - * only uppercase variants, which was later corrected to take both - with - * the exception of http_proxy, which is lowercase only also in CURL. As - * the lowercase versions are the historical quasi-standard, they take - * precedence here, as in CURL. - */ - if (!curl_http_proxy) { - if (http_auth.protocol && !strcmp(http_auth.protocol, "https")) { - var_override(&curl_http_proxy, getenv("HTTPS_PROXY")); - var_override(&curl_http_proxy, getenv("https_proxy")); - } else { - var_override(&curl_http_proxy, getenv("http_proxy")); - } - if (!curl_http_proxy) { - var_override(&curl_http_proxy, getenv("ALL_PROXY")); - var_override(&curl_http_proxy, getenv("all_proxy")); - } - } - - if (curl_http_proxy && curl_http_proxy[0] == '\0') { - /* - * Handle case with the empty http.proxy value here to keep - * common code clean. - * NB: empty option disables proxying at all. - */ - curl_easy_setopt(result, CURLOPT_PROXY, ""); - } else if (curl_http_proxy) { -#if LIBCURL_VERSION_NUM >= 0x071800 - if (starts_with(curl_http_proxy, "socks5h")) - curl_easy_setopt(result, - CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME); - else if (starts_with(curl_http_proxy, "socks5")) - curl_easy_setopt(result, - CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); - else if (starts_with(curl_http_proxy, "socks4a")) - curl_easy_setopt(result, - CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A); - else if (starts_with(curl_http_proxy, "socks")) - curl_easy_setopt(result, - CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4); -#endif -#if LIBCURL_VERSION_NUM >= 0x073400 - else if (starts_with(curl_http_proxy, "https")) { - curl_easy_setopt(result, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS); - - if (http_proxy_ssl_cert) - curl_easy_setopt(result, CURLOPT_PROXY_SSLCERT, http_proxy_ssl_cert); - - if (http_proxy_ssl_key) - curl_easy_setopt(result, CURLOPT_PROXY_SSLKEY, http_proxy_ssl_key); - - if (has_proxy_cert_password()) - curl_easy_setopt(result, CURLOPT_PROXY_KEYPASSWD, proxy_cert_auth.password); - } -#endif - if (strstr(curl_http_proxy, "://")) - credential_from_url(&proxy_auth, curl_http_proxy); - else { - struct strbuf url = STRBUF_INIT; - strbuf_addf(&url, "http://%s", curl_http_proxy); - credential_from_url(&proxy_auth, url.buf); - strbuf_release(&url); - } - - if (!proxy_auth.host) - die("Invalid proxy URL '%s'", curl_http_proxy); - - curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host); -#if LIBCURL_VERSION_NUM >= 0x071304 - var_override(&curl_no_proxy, getenv("NO_PROXY")); - var_override(&curl_no_proxy, getenv("no_proxy")); - curl_easy_setopt(result, CURLOPT_NOPROXY, curl_no_proxy); -#endif - } - init_curl_proxy_auth(result); - - set_curl_keepalive(result); - - return result; -} - -static void set_from_env(const char **var, const char *envname) -{ - const char *val = getenv(envname); - if (val) - *var = val; -} - -void http_init(struct remote *remote, const char *url, int proactive_auth) -{ - char *low_speed_limit; - char *low_speed_time; - char *normalized_url; - struct urlmatch_config config = { STRING_LIST_INIT_DUP }; - - config.section = "http"; - config.key = NULL; - config.collect_fn = http_options; - config.cascade_fn = git_default_config; - config.cb = NULL; - - http_is_verbose = 0; - normalized_url = url_normalize(url, &config.url); - - git_config(urlmatch_config_entry, &config); - free(normalized_url); - string_list_clear(&config.vars, 1); - -#if LIBCURL_VERSION_NUM >= 0x073800 - if (http_ssl_backend) { - const curl_ssl_backend **backends; - struct strbuf buf = STRBUF_INIT; - int i; - - switch (curl_global_sslset(-1, http_ssl_backend, &backends)) { - case CURLSSLSET_UNKNOWN_BACKEND: - strbuf_addf(&buf, _("Unsupported SSL backend '%s'. " - "Supported SSL backends:"), - http_ssl_backend); - for (i = 0; backends[i]; i++) - strbuf_addf(&buf, "\n\t%s", backends[i]->name); - die("%s", buf.buf); - case CURLSSLSET_NO_BACKENDS: - die(_("Could not set SSL backend to '%s': " - "cURL was built without SSL backends"), - http_ssl_backend); - case CURLSSLSET_TOO_LATE: - die(_("Could not set SSL backend to '%s': already set"), - http_ssl_backend); - case CURLSSLSET_OK: - break; /* Okay! */ - } - } -#endif - - if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) - die("curl_global_init failed"); - - http_proactive_auth = proactive_auth; - - if (remote && remote->http_proxy) - curl_http_proxy = xstrdup(remote->http_proxy); - - if (remote) - var_override(&http_proxy_authmethod, remote->http_proxy_authmethod); - - pragma_header = curl_slist_append(http_copy_default_headers(), - "Pragma: no-cache"); - no_pragma_header = curl_slist_append(http_copy_default_headers(), - "Pragma:"); - -#ifdef USE_CURL_MULTI - { - char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); - if (http_max_requests != NULL) - max_requests = atoi(http_max_requests); - } - - curlm = curl_multi_init(); - if (!curlm) - die("curl_multi_init failed"); -#endif - - if (getenv("GIT_SSL_NO_VERIFY")) - curl_ssl_verify = 0; - - set_from_env(&ssl_cert, "GIT_SSL_CERT"); -#if LIBCURL_VERSION_NUM >= 0x070903 - set_from_env(&ssl_key, "GIT_SSL_KEY"); -#endif -#if LIBCURL_VERSION_NUM >= 0x070908 - set_from_env(&ssl_capath, "GIT_SSL_CAPATH"); -#endif - set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO"); - - set_from_env(&user_agent, "GIT_HTTP_USER_AGENT"); - - low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); - if (low_speed_limit != NULL) - curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); - low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); - if (low_speed_time != NULL) - curl_low_speed_time = strtol(low_speed_time, NULL, 10); - - if (curl_ssl_verify == -1) - curl_ssl_verify = 1; - - curl_session_count = 0; -#ifdef USE_CURL_MULTI - if (max_requests < 1) - max_requests = DEFAULT_MAX_REQUESTS; -#endif - - set_from_env(&http_proxy_ssl_cert, "GIT_PROXY_SSL_CERT"); - set_from_env(&http_proxy_ssl_key, "GIT_PROXY_SSL_KEY"); - set_from_env(&http_proxy_ssl_ca_info, "GIT_PROXY_SSL_CAINFO"); - - if (getenv("GIT_PROXY_SSL_CERT_PASSWORD_PROTECTED")) - proxy_ssl_cert_password_required = 1; - - if (getenv("GIT_CURL_FTP_NO_EPSV")) - curl_ftp_no_epsv = 1; - - if (url) { - credential_from_url(&http_auth, url); - if (!ssl_cert_password_required && - getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") && - starts_with(url, "https://")) - ssl_cert_password_required = 1; - } - -#ifndef NO_CURL_EASY_DUPHANDLE - curl_default = get_curl_handle(); -#endif -} - -void http_cleanup(void) -{ - struct active_request_slot *slot = active_queue_head; - - while (slot != NULL) { - struct active_request_slot *next = slot->next; - if (slot->curl != NULL) { - xmulti_remove_handle(slot); - curl_easy_cleanup(slot->curl); - } - free(slot); - slot = next; - } - active_queue_head = NULL; - -#ifndef NO_CURL_EASY_DUPHANDLE - curl_easy_cleanup(curl_default); -#endif - -#ifdef USE_CURL_MULTI - curl_multi_cleanup(curlm); -#endif - curl_global_cleanup(); - - string_list_clear(&extra_http_headers, 0); - - curl_slist_free_all(pragma_header); - pragma_header = NULL; - - curl_slist_free_all(no_pragma_header); - no_pragma_header = NULL; - - if (curl_http_proxy) { - free((void *)curl_http_proxy); - curl_http_proxy = NULL; - } - - if (proxy_auth.password) { - memset(proxy_auth.password, 0, strlen(proxy_auth.password)); - FREE_AND_NULL(proxy_auth.password); - } - - free((void *)curl_proxyuserpwd); - curl_proxyuserpwd = NULL; - - free((void *)http_proxy_authmethod); - http_proxy_authmethod = NULL; - - if (cert_auth.password != NULL) { - memset(cert_auth.password, 0, strlen(cert_auth.password)); - FREE_AND_NULL(cert_auth.password); - } - ssl_cert_password_required = 0; - - if (proxy_cert_auth.password != NULL) { - memset(proxy_cert_auth.password, 0, strlen(proxy_cert_auth.password)); - FREE_AND_NULL(proxy_cert_auth.password); - } - proxy_ssl_cert_password_required = 0; - - FREE_AND_NULL(cached_accept_language); -} - -struct active_request_slot *get_active_slot(void) -{ - struct active_request_slot *slot = active_queue_head; - struct active_request_slot *newslot; - -#ifdef USE_CURL_MULTI - int num_transfers; - - /* Wait for a slot to open up if the queue is full */ - while (active_requests >= max_requests) { - curl_multi_perform(curlm, &num_transfers); - if (num_transfers < active_requests) - process_curl_messages(); - } -#endif - - while (slot != NULL && slot->in_use) - slot = slot->next; - - if (slot == NULL) { - newslot = xmalloc(sizeof(*newslot)); - newslot->curl = NULL; - newslot->in_use = 0; - newslot->next = NULL; - - slot = active_queue_head; - if (slot == NULL) { - active_queue_head = newslot; - } else { - while (slot->next != NULL) - slot = slot->next; - slot->next = newslot; - } - slot = newslot; - } - - if (slot->curl == NULL) { -#ifdef NO_CURL_EASY_DUPHANDLE - slot->curl = get_curl_handle(); -#else - slot->curl = curl_easy_duphandle(curl_default); -#endif - curl_session_count++; - } - - active_requests++; - slot->in_use = 1; - slot->results = NULL; - slot->finished = NULL; - slot->callback_data = NULL; - slot->callback_func = NULL; - curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file); - if (curl_save_cookies) - curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file); - curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); - curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); - curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); - curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); - curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); - curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL); - curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); - curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); - curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1); - curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL); - - /* - * Default following to off unless "ALWAYS" is configured; this gives - * callers a sane starting point, and they can tweak for individual - * HTTP_FOLLOW_* cases themselves. - */ - if (http_follow_config == HTTP_FOLLOW_ALWAYS) - curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); - else - curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 0); - -#if LIBCURL_VERSION_NUM >= 0x070a08 - curl_easy_setopt(slot->curl, CURLOPT_IPRESOLVE, git_curl_ipresolve); -#endif -#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY - curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods); -#endif - if (http_auth.password || curl_empty_auth_enabled()) - init_curl_http_auth(slot->curl); - - return slot; -} - -int start_active_slot(struct active_request_slot *slot) -{ -#ifdef USE_CURL_MULTI - CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); - int num_transfers; - - if (curlm_result != CURLM_OK && - curlm_result != CURLM_CALL_MULTI_PERFORM) { - warning("curl_multi_add_handle failed: %s", - curl_multi_strerror(curlm_result)); - active_requests--; - slot->in_use = 0; - return 0; - } - - /* - * We know there must be something to do, since we just added - * something. - */ - curl_multi_perform(curlm, &num_transfers); -#endif - return 1; -} - -#ifdef USE_CURL_MULTI -struct fill_chain { - void *data; - int (*fill)(void *); - struct fill_chain *next; -}; - -static struct fill_chain *fill_cfg; - -void add_fill_function(void *data, int (*fill)(void *)) -{ - struct fill_chain *new_fill = xmalloc(sizeof(*new_fill)); - struct fill_chain **linkp = &fill_cfg; - new_fill->data = data; - new_fill->fill = fill; - new_fill->next = NULL; - while (*linkp) - linkp = &(*linkp)->next; - *linkp = new_fill; -} - -void fill_active_slots(void) -{ - struct active_request_slot *slot = active_queue_head; - - while (active_requests < max_requests) { - struct fill_chain *fill; - for (fill = fill_cfg; fill; fill = fill->next) - if (fill->fill(fill->data)) - break; - - if (!fill) - break; - } - - while (slot != NULL) { - if (!slot->in_use && slot->curl != NULL - && curl_session_count > min_curl_sessions) { - curl_easy_cleanup(slot->curl); - slot->curl = NULL; - curl_session_count--; - } - slot = slot->next; - } -} - -void step_active_slots(void) -{ - int num_transfers; - CURLMcode curlm_result; - - do { - curlm_result = curl_multi_perform(curlm, &num_transfers); - } while (curlm_result == CURLM_CALL_MULTI_PERFORM); - if (num_transfers < active_requests) { - process_curl_messages(); - fill_active_slots(); - } -} -#endif - -void run_active_slot(struct active_request_slot *slot) -{ -#ifdef USE_CURL_MULTI - fd_set readfds; - fd_set writefds; - fd_set excfds; - int max_fd; - struct timeval select_timeout; - int finished = 0; - - slot->finished = &finished; - while (!finished) { - step_active_slots(); - - if (slot->in_use) { -#if LIBCURL_VERSION_NUM >= 0x070f04 - long curl_timeout; - curl_multi_timeout(curlm, &curl_timeout); - if (curl_timeout == 0) { - continue; - } else if (curl_timeout == -1) { - select_timeout.tv_sec = 0; - select_timeout.tv_usec = 50000; - } else { - select_timeout.tv_sec = curl_timeout / 1000; - select_timeout.tv_usec = (curl_timeout % 1000) * 1000; - } -#else - select_timeout.tv_sec = 0; - select_timeout.tv_usec = 50000; -#endif - - max_fd = -1; - FD_ZERO(&readfds); - FD_ZERO(&writefds); - FD_ZERO(&excfds); - curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd); - - /* - * It can happen that curl_multi_timeout returns a pathologically - * long timeout when curl_multi_fdset returns no file descriptors - * to read. See commit message for more details. - */ - if (max_fd < 0 && - (select_timeout.tv_sec > 0 || - select_timeout.tv_usec > 50000)) { - select_timeout.tv_sec = 0; - select_timeout.tv_usec = 50000; - } - - select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout); - } - } -#else - while (slot->in_use) { - slot->curl_result = curl_easy_perform(slot->curl); - finish_active_slot(slot); - } -#endif -} - -static void release_active_slot(struct active_request_slot *slot) -{ - closedown_active_slot(slot); - if (slot->curl) { - xmulti_remove_handle(slot); - if (curl_session_count > min_curl_sessions) { - curl_easy_cleanup(slot->curl); - slot->curl = NULL; - curl_session_count--; - } - } -#ifdef USE_CURL_MULTI - fill_active_slots(); -#endif -} - -void finish_all_active_slots(void) -{ - struct active_request_slot *slot = active_queue_head; - - while (slot != NULL) - if (slot->in_use) { - run_active_slot(slot); - slot = active_queue_head; - } else { - slot = slot->next; - } -} - -/* Helpers for modifying and creating URLs */ -static inline int needs_quote(int ch) -{ - if (((ch >= 'A') && (ch <= 'Z')) - || ((ch >= 'a') && (ch <= 'z')) - || ((ch >= '0') && (ch <= '9')) - || (ch == '/') - || (ch == '-') - || (ch == '.')) - return 0; - return 1; -} - -static char *quote_ref_url(const char *base, const char *ref) -{ - struct strbuf buf = STRBUF_INIT; - const char *cp; - int ch; - - end_url_with_slash(&buf, base); - - for (cp = ref; (ch = *cp) != 0; cp++) - if (needs_quote(ch)) - strbuf_addf(&buf, "%%%02x", ch); - else - strbuf_addch(&buf, *cp); - - return strbuf_detach(&buf, NULL); -} - -void append_remote_object_url(struct strbuf *buf, const char *url, - const char *hex, - int only_two_digit_prefix) -{ - end_url_with_slash(buf, url); - - strbuf_addf(buf, "objects/%.*s/", 2, hex); - if (!only_two_digit_prefix) - strbuf_addstr(buf, hex + 2); -} - -char *get_remote_object_url(const char *url, const char *hex, - int only_two_digit_prefix) -{ - struct strbuf buf = STRBUF_INIT; - append_remote_object_url(&buf, url, hex, only_two_digit_prefix); - return strbuf_detach(&buf, NULL); -} - -void normalize_curl_result(CURLcode *result, long http_code, - char *errorstr, size_t errorlen) -{ - /* - * If we see a failing http code with CURLE_OK, we have turned off - * FAILONERROR (to keep the server's custom error response), and should - * translate the code into failure here. - * - * Likewise, if we see a redirect (30x code), that means we turned off - * redirect-following, and we should treat the result as an error. - */ - if (*result == CURLE_OK && http_code >= 300) { - *result = CURLE_HTTP_RETURNED_ERROR; - /* - * Normally curl will already have put the "reason phrase" - * from the server into curl_errorstr; unfortunately without - * FAILONERROR it is lost, so we can give only the numeric - * status code. - */ - xsnprintf(errorstr, errorlen, - "The requested URL returned error: %ld", - http_code); - } -} - -static int handle_curl_result(struct slot_results *results) -{ - normalize_curl_result(&results->curl_result, results->http_code, - curl_errorstr, sizeof(curl_errorstr)); - - if (results->curl_result == CURLE_OK) { - credential_approve(&http_auth); - if (proxy_auth.password) - credential_approve(&proxy_auth); - return HTTP_OK; - } else if (missing_target(results)) - return HTTP_MISSING_TARGET; - else if (results->http_code == 401) { - if (http_auth.username && http_auth.password) { - credential_reject(&http_auth); - return HTTP_NOAUTH; - } else { -#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY - http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE; - if (results->auth_avail) { - http_auth_methods &= results->auth_avail; - http_auth_methods_restricted = 1; - } -#endif - return HTTP_REAUTH; - } - } else { - if (results->http_connectcode == 407) - credential_reject(&proxy_auth); -#if LIBCURL_VERSION_NUM >= 0x070c00 - if (!curl_errorstr[0]) - strlcpy(curl_errorstr, - curl_easy_strerror(results->curl_result), - sizeof(curl_errorstr)); -#endif - return HTTP_ERROR; - } -} - -int run_one_slot(struct active_request_slot *slot, - struct slot_results *results) -{ - slot->results = results; - if (!start_active_slot(slot)) { - xsnprintf(curl_errorstr, sizeof(curl_errorstr), - "failed to start HTTP request"); - return HTTP_START_FAILED; - } - - run_active_slot(slot); - return handle_curl_result(results); -} - -struct curl_slist *http_copy_default_headers(void) -{ - struct curl_slist *headers = NULL; - const struct string_list_item *item; - - for_each_string_list_item(item, &extra_http_headers) - headers = curl_slist_append(headers, item->string); - - return headers; -} - -static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf) -{ - char *ptr; - CURLcode ret; - - strbuf_reset(buf); - ret = curl_easy_getinfo(curl, info, &ptr); - if (!ret && ptr) - strbuf_addstr(buf, ptr); - return ret; -} - -/* - * Check for and extract a content-type parameter. "raw" - * should be positioned at the start of the potential - * parameter, with any whitespace already removed. - * - * "name" is the name of the parameter. The value is appended - * to "out". - */ -static int extract_param(const char *raw, const char *name, - struct strbuf *out) -{ - size_t len = strlen(name); - - if (strncasecmp(raw, name, len)) - return -1; - raw += len; - - if (*raw != '=') - return -1; - raw++; - - while (*raw && !isspace(*raw) && *raw != ';') - strbuf_addch(out, *raw++); - return 0; -} - -/* - * Extract a normalized version of the content type, with any - * spaces suppressed, all letters lowercased, and no trailing ";" - * or parameters. - * - * Note that we will silently remove even invalid whitespace. For - * example, "text / plain" is specifically forbidden by RFC 2616, - * but "text/plain" is the only reasonable output, and this keeps - * our code simple. - * - * If the "charset" argument is not NULL, store the value of any - * charset parameter there. - * - * Example: - * "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8" - * "text / plain" -> "text/plain" - */ -static void extract_content_type(struct strbuf *raw, struct strbuf *type, - struct strbuf *charset) -{ - const char *p; - - strbuf_reset(type); - strbuf_grow(type, raw->len); - for (p = raw->buf; *p; p++) { - if (isspace(*p)) - continue; - if (*p == ';') { - p++; - break; - } - strbuf_addch(type, tolower(*p)); - } - - if (!charset) - return; - - strbuf_reset(charset); - while (*p) { - while (isspace(*p) || *p == ';') - p++; - if (!extract_param(p, "charset", charset)) - return; - while (*p && !isspace(*p)) - p++; - } - - if (!charset->len && starts_with(type->buf, "text/")) - strbuf_addstr(charset, "ISO-8859-1"); -} - -static void write_accept_language(struct strbuf *buf) -{ - /* - * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than - * that, q-value will be smaller than 0.001, the minimum q-value the - * HTTP specification allows. See - * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value. - */ - const int MAX_DECIMAL_PLACES = 3; - const int MAX_LANGUAGE_TAGS = 1000; - const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000; - char **language_tags = NULL; - int num_langs = 0; - const char *s = get_preferred_languages(); - int i; - struct strbuf tag = STRBUF_INIT; - - /* Don't add Accept-Language header if no language is preferred. */ - if (!s) - return; - - /* - * Split the colon-separated string of preferred languages into - * language_tags array. - */ - do { - /* collect language tag */ - for (; *s && (isalnum(*s) || *s == '_'); s++) - strbuf_addch(&tag, *s == '_' ? '-' : *s); - - /* skip .codeset, @modifier and any other unnecessary parts */ - while (*s && *s != ':') - s++; - - if (tag.len) { - num_langs++; - REALLOC_ARRAY(language_tags, num_langs); - language_tags[num_langs - 1] = strbuf_detach(&tag, NULL); - if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */ - break; - } - } while (*s++); - - /* write Accept-Language header into buf */ - if (num_langs) { - int last_buf_len = 0; - int max_q; - int decimal_places; - char q_format[32]; - - /* add '*' */ - REALLOC_ARRAY(language_tags, num_langs + 1); - language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */ - - /* compute decimal_places */ - for (max_q = 1, decimal_places = 0; - max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES; - decimal_places++, max_q *= 10) - ; - - xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places); - - strbuf_addstr(buf, "Accept-Language: "); - - for (i = 0; i < num_langs; i++) { - if (i > 0) - strbuf_addstr(buf, ", "); - - strbuf_addstr(buf, language_tags[i]); - - if (i > 0) - strbuf_addf(buf, q_format, max_q - i); - - if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) { - strbuf_remove(buf, last_buf_len, buf->len - last_buf_len); - break; - } - - last_buf_len = buf->len; - } - } - - /* free language tags -- last one is a static '*' */ - for (i = 0; i < num_langs - 1; i++) - free(language_tags[i]); - free(language_tags); -} - -/* - * Get an Accept-Language header which indicates user's preferred languages. - * - * Examples: - * LANGUAGE= -> "" - * LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1" - * LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1" - * LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1" - * LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1" - * LANGUAGE= LANG=C -> "" - */ -static const char *get_accept_language(void) -{ - if (!cached_accept_language) { - struct strbuf buf = STRBUF_INIT; - write_accept_language(&buf); - if (buf.len > 0) - cached_accept_language = strbuf_detach(&buf, NULL); - } - - return cached_accept_language; -} - -static void http_opt_request_remainder(CURL *curl, off_t pos) -{ - char buf[128]; - xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos); - curl_easy_setopt(curl, CURLOPT_RANGE, buf); -} - -/* http_request() targets */ -#define HTTP_REQUEST_STRBUF 0 -#define HTTP_REQUEST_FILE 1 - -static int http_request(const char *url, - void *result, int target, - const struct http_get_options *options) -{ - struct active_request_slot *slot; - struct slot_results results; - struct curl_slist *headers = http_copy_default_headers(); - struct strbuf buf = STRBUF_INIT; - const char *accept_language; - int ret; - - slot = get_active_slot(); - curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); - - if (result == NULL) { - curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); - } else { - curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); - curl_easy_setopt(slot->curl, CURLOPT_FILE, result); - - if (target == HTTP_REQUEST_FILE) { - off_t posn = ftello(result); - curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, - fwrite); - if (posn > 0) - http_opt_request_remainder(slot->curl, posn); - } else - curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, - fwrite_buffer); - } - - accept_language = get_accept_language(); - - if (accept_language) - headers = curl_slist_append(headers, accept_language); - - strbuf_addstr(&buf, "Pragma:"); - if (options && options->no_cache) - strbuf_addstr(&buf, " no-cache"); - if (options && options->initial_request && - http_follow_config == HTTP_FOLLOW_INITIAL) - curl_easy_setopt(slot->curl, CURLOPT_FOLLOWLOCATION, 1); - - headers = curl_slist_append(headers, buf.buf); - - /* Add additional headers here */ - if (options && options->extra_headers) { - const struct string_list_item *item; - for_each_string_list_item(item, options->extra_headers) { - headers = curl_slist_append(headers, item->string); - } - } - - curl_easy_setopt(slot->curl, CURLOPT_URL, url); - curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); - curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); - curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0); - - ret = run_one_slot(slot, &results); - - if (options && options->content_type) { - struct strbuf raw = STRBUF_INIT; - curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw); - extract_content_type(&raw, options->content_type, - options->charset); - strbuf_release(&raw); - } - - if (options && options->effective_url) - curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL, - options->effective_url); - - curl_slist_free_all(headers); - strbuf_release(&buf); - - return ret; -} - -/* - * Update the "base" url to a more appropriate value, as deduced by - * redirects seen when requesting a URL starting with "url". - * - * The "asked" parameter is a URL that we asked curl to access, and must begin - * with "base". - * - * The "got" parameter is the URL that curl reported to us as where we ended - * up. - * - * Returns 1 if we updated the base url, 0 otherwise. - * - * Our basic strategy is to compare "base" and "asked" to find the bits - * specific to our request. We then strip those bits off of "got" to yield the - * new base. So for example, if our base is "http://example.com/foo.git", - * and we ask for "http://example.com/foo.git/info/refs", we might end up - * with "https://other.example.com/foo.git/info/refs". We would want the - * new URL to become "https://other.example.com/foo.git". - * - * Note that this assumes a sane redirect scheme. It's entirely possible - * in the example above to end up at a URL that does not even end in - * "info/refs". In such a case we die. There's not much we can do, such a - * scheme is unlikely to represent a real git repository, and failing to - * rewrite the base opens options for malicious redirects to do funny things. - */ -static int update_url_from_redirect(struct strbuf *base, - const char *asked, - const struct strbuf *got) -{ - const char *tail; - size_t new_len; - - if (!strcmp(asked, got->buf)) - return 0; - - if (!skip_prefix(asked, base->buf, &tail)) - BUG("update_url_from_redirect: %s is not a superset of %s", - asked, base->buf); - - new_len = got->len; - if (!strip_suffix_mem(got->buf, &new_len, tail)) - die(_("unable to update url base from redirection:\n" - " asked for: %s\n" - " redirect: %s"), - asked, got->buf); - - strbuf_reset(base); - strbuf_add(base, got->buf, new_len); - - return 1; -} - -static int http_request_reauth(const char *url, - void *result, int target, - struct http_get_options *options) -{ - int ret = http_request(url, result, target, options); - - if (ret != HTTP_OK && ret != HTTP_REAUTH) - return ret; - - if (options && options->effective_url && options->base_url) { - if (update_url_from_redirect(options->base_url, - url, options->effective_url)) { - credential_from_url(&http_auth, options->base_url->buf); - url = options->effective_url->buf; - } - } - - if (ret != HTTP_REAUTH) - return ret; - - /* - * The previous request may have put cruft into our output stream; we - * should clear it out before making our next request. - */ - switch (target) { - case HTTP_REQUEST_STRBUF: - strbuf_reset(result); - break; - case HTTP_REQUEST_FILE: - if (fflush(result)) { - error_errno("unable to flush a file"); - return HTTP_START_FAILED; - } - rewind(result); - if (ftruncate(fileno(result), 0) < 0) { - error_errno("unable to truncate a file"); - return HTTP_START_FAILED; - } - break; - default: - BUG("Unknown http_request target"); - } - - credential_fill(&http_auth); - - return http_request(url, result, target, options); -} - -int http_get_strbuf(const char *url, - struct strbuf *result, - struct http_get_options *options) -{ - return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options); -} - -/* - * Downloads a URL and stores the result in the given file. - * - * If a previous interrupted download is detected (i.e. a previous temporary - * file is still around) the download is resumed. - */ -static int http_get_file(const char *url, const char *filename, - struct http_get_options *options) -{ - int ret; - struct strbuf tmpfile = STRBUF_INIT; - FILE *result; - - strbuf_addf(&tmpfile, "%s.temp", filename); - result = fopen(tmpfile.buf, "a"); - if (!result) { - error("Unable to open local file %s", tmpfile.buf); - ret = HTTP_ERROR; - goto cleanup; - } - - ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options); - fclose(result); - - if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename)) - ret = HTTP_ERROR; -cleanup: - strbuf_release(&tmpfile); - return ret; -} - -int http_fetch_ref(const char *base, struct ref *ref) -{ - struct http_get_options options = {0}; - char *url; - struct strbuf buffer = STRBUF_INIT; - int ret = -1; - - options.no_cache = 1; - - url = quote_ref_url(base, ref->name); - if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) { - strbuf_rtrim(&buffer); - if (buffer.len == the_hash_algo->hexsz) - ret = get_oid_hex(buffer.buf, &ref->old_oid); - else if (starts_with(buffer.buf, "ref: ")) { - ref->symref = xstrdup(buffer.buf + 5); - ret = 0; - } - } - - strbuf_release(&buffer); - free(url); - return ret; -} - -/* Helpers for fetching packs */ -static char *fetch_pack_index(unsigned char *hash, const char *base_url) -{ - char *url, *tmp; - struct strbuf buf = STRBUF_INIT; - - if (http_is_verbose) - fprintf(stderr, "Getting index for pack %s\n", hash_to_hex(hash)); - - end_url_with_slash(&buf, base_url); - strbuf_addf(&buf, "objects/pack/pack-%s.idx", hash_to_hex(hash)); - url = strbuf_detach(&buf, NULL); - - strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(hash)); - tmp = strbuf_detach(&buf, NULL); - - if (http_get_file(url, tmp, NULL) != HTTP_OK) { - error("Unable to get pack index %s", url); - FREE_AND_NULL(tmp); - } - - free(url); - return tmp; -} - -static int fetch_and_setup_pack_index(struct packed_git **packs_head, - unsigned char *sha1, const char *base_url) -{ - struct packed_git *new_pack; - char *tmp_idx = NULL; - int ret; - - if (has_pack_index(sha1)) { - new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1)); - if (!new_pack) - return -1; /* parse_pack_index() already issued error message */ - goto add_pack; - } - - tmp_idx = fetch_pack_index(sha1, base_url); - if (!tmp_idx) - return -1; - - new_pack = parse_pack_index(sha1, tmp_idx); - if (!new_pack) { - unlink(tmp_idx); - free(tmp_idx); - - return -1; /* parse_pack_index() already issued error message */ - } - - ret = verify_pack_index(new_pack); - if (!ret) { - close_pack_index(new_pack); - ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1)); - } - free(tmp_idx); - if (ret) - return -1; - -add_pack: - new_pack->next = *packs_head; - *packs_head = new_pack; - return 0; -} - -int http_get_info_packs(const char *base_url, struct packed_git **packs_head) -{ - struct http_get_options options = {0}; - int ret = 0; - char *url; - const char *data; - struct strbuf buf = STRBUF_INIT; - struct object_id oid; - - end_url_with_slash(&buf, base_url); - strbuf_addstr(&buf, "objects/info/packs"); - url = strbuf_detach(&buf, NULL); - - options.no_cache = 1; - ret = http_get_strbuf(url, &buf, &options); - if (ret != HTTP_OK) - goto cleanup; - - data = buf.buf; - while (*data) { - if (skip_prefix(data, "P pack-", &data) && - !parse_oid_hex(data, &oid, &data) && - skip_prefix(data, ".pack", &data) && - (*data == '\n' || *data == '\0')) { - fetch_and_setup_pack_index(packs_head, oid.hash, base_url); - } else { - data = strchrnul(data, '\n'); - } - if (*data) - data++; /* skip past newline */ - } - -cleanup: - free(url); - return ret; -} - -void release_http_pack_request(struct http_pack_request *preq) -{ - if (preq->packfile != NULL) { - fclose(preq->packfile); - preq->packfile = NULL; - } - preq->slot = NULL; - strbuf_release(&preq->tmpfile); - free(preq->url); - free(preq); -} - -int finish_http_pack_request(struct http_pack_request *preq) -{ - struct child_process ip = CHILD_PROCESS_INIT; - int tmpfile_fd; - int ret = 0; - - fclose(preq->packfile); - preq->packfile = NULL; - - tmpfile_fd = xopen(preq->tmpfile.buf, O_RDONLY); - - strvec_push(&ip.args, "index-pack"); - strvec_push(&ip.args, "--stdin"); - ip.git_cmd = 1; - ip.in = tmpfile_fd; - if (preq->generate_keep) { - strvec_pushf(&ip.args, "--keep=git %"PRIuMAX, - (uintmax_t)getpid()); - ip.out = 0; - } else { - ip.no_stdout = 1; - } - - if (run_command(&ip)) { - ret = -1; - goto cleanup; - } - -cleanup: - close(tmpfile_fd); - unlink(preq->tmpfile.buf); - return ret; -} - -void http_install_packfile(struct packed_git *p, - struct packed_git **list_to_remove_from) -{ - struct packed_git **lst = list_to_remove_from; - - while (*lst != p) - lst = &((*lst)->next); - *lst = (*lst)->next; - - install_packed_git(the_repository, p); -} - -struct http_pack_request *new_http_pack_request( - const unsigned char *packed_git_hash, const char *base_url) { - - struct strbuf buf = STRBUF_INIT; - - end_url_with_slash(&buf, base_url); - strbuf_addf(&buf, "objects/pack/pack-%s.pack", - hash_to_hex(packed_git_hash)); - return new_direct_http_pack_request(packed_git_hash, - strbuf_detach(&buf, NULL)); -} - -struct http_pack_request *new_direct_http_pack_request( - const unsigned char *packed_git_hash, char *url) -{ - off_t prev_posn = 0; - struct http_pack_request *preq; - - preq = xcalloc(1, sizeof(*preq)); - strbuf_init(&preq->tmpfile, 0); - - preq->url = url; - - strbuf_addf(&preq->tmpfile, "%s.temp", sha1_pack_name(packed_git_hash)); - preq->packfile = fopen(preq->tmpfile.buf, "a"); - if (!preq->packfile) { - error("Unable to open local file %s for pack", - preq->tmpfile.buf); - goto abort; - } - - preq->slot = get_active_slot(); - curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile); - curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite); - curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url); - curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, - no_pragma_header); - - /* - * If there is data present from a previous transfer attempt, - * resume where it left off - */ - prev_posn = ftello(preq->packfile); - if (prev_posn>0) { - if (http_is_verbose) - fprintf(stderr, - "Resuming fetch of pack %s at byte %"PRIuMAX"\n", - hash_to_hex(packed_git_hash), - (uintmax_t)prev_posn); - http_opt_request_remainder(preq->slot->curl, prev_posn); - } - - return preq; - -abort: - strbuf_release(&preq->tmpfile); - free(preq->url); - free(preq); - return NULL; -} - -/* Helpers for fetching objects (loose) */ -static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb, - void *data) -{ - unsigned char expn[4096]; - size_t size = eltsize * nmemb; - int posn = 0; - struct http_object_request *freq = data; - struct active_request_slot *slot = freq->slot; - - if (slot) { - CURLcode c = curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, - &slot->http_code); - if (c != CURLE_OK) - BUG("curl_easy_getinfo for HTTP code failed: %s", - curl_easy_strerror(c)); - if (slot->http_code >= 300) - return nmemb; - } - - do { - ssize_t retval = xwrite(freq->localfile, - (char *) ptr + posn, size - posn); - if (retval < 0) - return posn / eltsize; - posn += retval; - } while (posn < size); - - freq->stream.avail_in = size; - freq->stream.next_in = (void *)ptr; - do { - freq->stream.next_out = expn; - freq->stream.avail_out = sizeof(expn); - freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH); - the_hash_algo->update_fn(&freq->c, expn, - sizeof(expn) - freq->stream.avail_out); - } while (freq->stream.avail_in && freq->zret == Z_OK); - return nmemb; -} - -struct http_object_request *new_http_object_request(const char *base_url, - const struct object_id *oid) -{ - char *hex = oid_to_hex(oid); - struct strbuf filename = STRBUF_INIT; - struct strbuf prevfile = STRBUF_INIT; - int prevlocal; - char prev_buf[PREV_BUF_SIZE]; - ssize_t prev_read = 0; - off_t prev_posn = 0; - struct http_object_request *freq; - - freq = xcalloc(1, sizeof(*freq)); - strbuf_init(&freq->tmpfile, 0); - oidcpy(&freq->oid, oid); - freq->localfile = -1; - - loose_object_path(the_repository, &filename, oid); - strbuf_addf(&freq->tmpfile, "%s.temp", filename.buf); - - strbuf_addf(&prevfile, "%s.prev", filename.buf); - unlink_or_warn(prevfile.buf); - rename(freq->tmpfile.buf, prevfile.buf); - unlink_or_warn(freq->tmpfile.buf); - strbuf_release(&filename); - - if (freq->localfile != -1) - error("fd leakage in start: %d", freq->localfile); - freq->localfile = open(freq->tmpfile.buf, - O_WRONLY | O_CREAT | O_EXCL, 0666); - /* - * This could have failed due to the "lazy directory creation"; - * try to mkdir the last path component. - */ - if (freq->localfile < 0 && errno == ENOENT) { - char *dir = strrchr(freq->tmpfile.buf, '/'); - if (dir) { - *dir = 0; - mkdir(freq->tmpfile.buf, 0777); - *dir = '/'; - } - freq->localfile = open(freq->tmpfile.buf, - O_WRONLY | O_CREAT | O_EXCL, 0666); - } - - if (freq->localfile < 0) { - error_errno("Couldn't create temporary file %s", - freq->tmpfile.buf); - goto abort; - } - - git_inflate_init(&freq->stream); - - the_hash_algo->init_fn(&freq->c); - - freq->url = get_remote_object_url(base_url, hex, 0); - - /* - * If a previous temp file is present, process what was already - * fetched. - */ - prevlocal = open(prevfile.buf, O_RDONLY); - if (prevlocal != -1) { - do { - prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); - if (prev_read>0) { - if (fwrite_sha1_file(prev_buf, - 1, - prev_read, - freq) == prev_read) { - prev_posn += prev_read; - } else { - prev_read = -1; - } - } - } while (prev_read > 0); - close(prevlocal); - } - unlink_or_warn(prevfile.buf); - strbuf_release(&prevfile); - - /* - * Reset inflate/SHA1 if there was an error reading the previous temp - * file; also rewind to the beginning of the local file. - */ - if (prev_read == -1) { - memset(&freq->stream, 0, sizeof(freq->stream)); - git_inflate_init(&freq->stream); - the_hash_algo->init_fn(&freq->c); - if (prev_posn>0) { - prev_posn = 0; - lseek(freq->localfile, 0, SEEK_SET); - if (ftruncate(freq->localfile, 0) < 0) { - error_errno("Couldn't truncate temporary file %s", - freq->tmpfile.buf); - goto abort; - } - } - } - - freq->slot = get_active_slot(); - - curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); - curl_easy_setopt(freq->slot->curl, CURLOPT_FAILONERROR, 0); - curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); - curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); - curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url); - curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); - - /* - * If we have successfully processed data from a previous fetch - * attempt, only fetch the data we don't already have. - */ - if (prev_posn>0) { - if (http_is_verbose) - fprintf(stderr, - "Resuming fetch of object %s at byte %"PRIuMAX"\n", - hex, (uintmax_t)prev_posn); - http_opt_request_remainder(freq->slot->curl, prev_posn); - } - - return freq; - -abort: - strbuf_release(&prevfile); - free(freq->url); - free(freq); - return NULL; -} - -void process_http_object_request(struct http_object_request *freq) -{ - if (freq->slot == NULL) - return; - freq->curl_result = freq->slot->curl_result; - freq->http_code = freq->slot->http_code; - freq->slot = NULL; -} - -int finish_http_object_request(struct http_object_request *freq) -{ - struct stat st; - struct strbuf filename = STRBUF_INIT; - - close(freq->localfile); - freq->localfile = -1; - - process_http_object_request(freq); - - if (freq->http_code == 416) { - warning("requested range invalid; we may already have all the data."); - } else if (freq->curl_result != CURLE_OK) { - if (stat(freq->tmpfile.buf, &st) == 0) - if (st.st_size == 0) - unlink_or_warn(freq->tmpfile.buf); - return -1; - } - - git_inflate_end(&freq->stream); - the_hash_algo->final_fn(freq->real_oid.hash, &freq->c); - if (freq->zret != Z_STREAM_END) { - unlink_or_warn(freq->tmpfile.buf); - return -1; - } - if (!oideq(&freq->oid, &freq->real_oid)) { - unlink_or_warn(freq->tmpfile.buf); - return -1; - } - loose_object_path(the_repository, &filename, &freq->oid); - freq->rename = finalize_object_file(freq->tmpfile.buf, filename.buf); - strbuf_release(&filename); - - return freq->rename; -} - -void abort_http_object_request(struct http_object_request *freq) -{ - unlink_or_warn(freq->tmpfile.buf); - - release_http_object_request(freq); -} - -void release_http_object_request(struct http_object_request *freq) -{ - if (freq->localfile != -1) { - close(freq->localfile); - freq->localfile = -1; - } - FREE_AND_NULL(freq->url); - if (freq->slot != NULL) { - freq->slot->callback_func = NULL; - freq->slot->callback_data = NULL; - release_active_slot(freq->slot); - freq->slot = NULL; - } - strbuf_release(&freq->tmpfile); -} |