Mercurial > hg > nginx
view src/http/ngx_http_variables.c @ 7690:8253424d1aff
Added size check to ngx_http_alloc_large_header_buffer().
This ensures that copying won't write more than the buffer size
even if the buffer comes from hc->free and it is smaller than the large
client header buffer size in the virtual host configuration. This might
happen if size of large client header buffers is different in name-based
virtual hosts, similarly to the problem with number of buffers fixed
in 6926:e662cbf1b932.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 06 Aug 2020 05:02:22 +0300 |
| parents | 028b16e2798f |
| children | 6d4f7d5e279f |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #include <nginx.h> static ngx_http_variable_t *ngx_http_add_prefix_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags); static ngx_int_t ngx_http_variable_request(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); #if 0 static void ngx_http_variable_request_set(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); #endif static ngx_int_t ngx_http_variable_request_get_size(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_header(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_cookies(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_headers(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_headers_internal(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data, u_char sep); static ngx_int_t ngx_http_variable_unknown_header_in(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_unknown_header_out(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_unknown_trailer_out(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_line(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); #if (NGX_HAVE_TCP_INFO) static ngx_int_t ngx_http_variable_tcpinfo(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); #endif static ngx_int_t ngx_http_variable_content_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_host(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_binary_remote_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_remote_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_remote_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_proxy_protocol_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_proxy_protocol_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_server_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_server_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_scheme(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_https(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static void ngx_http_variable_set_args(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_is_args(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_document_root(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_realpath_root(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_filename(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_server_name(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_method(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_remote_user(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_bytes_sent(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_body_bytes_sent(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_pipe(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_completion(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_body(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_body_file(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_time(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_request_id(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_status(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_content_type(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_content_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_location(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_last_modified(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_connection(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_keep_alive(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_sent_transfer_encoding(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static void ngx_http_variable_set_limit_rate(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_connection(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_connection_requests(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_nginx_version(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_hostname(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_pid(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_msec(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_time_iso8601(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_time_local(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); /* * TODO: * Apache CGI: AUTH_TYPE, PATH_INFO (null), PATH_TRANSLATED * REMOTE_HOST (null), REMOTE_IDENT (null), * SERVER_SOFTWARE * * Apache SSI: DOCUMENT_NAME, LAST_MODIFIED, USER_NAME (file owner) */ /* * the $http_host, $http_user_agent, $http_referer, and $http_via * variables may be handled by generic * ngx_http_variable_unknown_header_in(), but for performance reasons * they are handled using dedicated entries */ static ngx_http_variable_t ngx_http_core_variables[] = { { ngx_string("http_host"), NULL, ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.host), 0, 0 }, { ngx_string("http_user_agent"), NULL, ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.user_agent), 0, 0 }, { ngx_string("http_referer"), NULL, ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.referer), 0, 0 }, #if (NGX_HTTP_GZIP) { ngx_string("http_via"), NULL, ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.via), 0, 0 }, #endif #if (NGX_HTTP_X_FORWARDED_FOR) { ngx_string("http_x_forwarded_for"), NULL, ngx_http_variable_headers, offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0, 0 }, #endif { ngx_string("http_cookie"), NULL, ngx_http_variable_cookies, offsetof(ngx_http_request_t, headers_in.cookies), 0, 0 }, { ngx_string("content_length"), NULL, ngx_http_variable_content_length, 0, 0, 0 }, { ngx_string("content_type"), NULL, ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.content_type), 0, 0 }, { ngx_string("host"), NULL, ngx_http_variable_host, 0, 0, 0 }, { ngx_string("binary_remote_addr"), NULL, ngx_http_variable_binary_remote_addr, 0, 0, 0 }, { ngx_string("remote_addr"), NULL, ngx_http_variable_remote_addr, 0, 0, 0 }, { ngx_string("remote_port"), NULL, ngx_http_variable_remote_port, 0, 0, 0 }, { ngx_string("proxy_protocol_addr"), NULL, ngx_http_variable_proxy_protocol_addr, offsetof(ngx_proxy_protocol_t, src_addr), 0, 0 }, { ngx_string("proxy_protocol_port"), NULL, ngx_http_variable_proxy_protocol_port, offsetof(ngx_proxy_protocol_t, src_port), 0, 0 }, { ngx_string("proxy_protocol_server_addr"), NULL, ngx_http_variable_proxy_protocol_addr, offsetof(ngx_proxy_protocol_t, dst_addr), 0, 0 }, { ngx_string("proxy_protocol_server_port"), NULL, ngx_http_variable_proxy_protocol_port, offsetof(ngx_proxy_protocol_t, dst_port), 0, 0 }, { ngx_string("server_addr"), NULL, ngx_http_variable_server_addr, 0, 0, 0 }, { ngx_string("server_port"), NULL, ngx_http_variable_server_port, 0, 0, 0 }, { ngx_string("server_protocol"), NULL, ngx_http_variable_request, offsetof(ngx_http_request_t, http_protocol), 0, 0 }, { ngx_string("scheme"), NULL, ngx_http_variable_scheme, 0, 0, 0 }, { ngx_string("https"), NULL, ngx_http_variable_https, 0, 0, 0 }, { ngx_string("request_uri"), NULL, ngx_http_variable_request, offsetof(ngx_http_request_t, unparsed_uri), 0, 0 }, { ngx_string("uri"), NULL, ngx_http_variable_request, offsetof(ngx_http_request_t, uri), NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("document_uri"), NULL, ngx_http_variable_request, offsetof(ngx_http_request_t, uri), NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("request"), NULL, ngx_http_variable_request_line, 0, 0, 0 }, { ngx_string("document_root"), NULL, ngx_http_variable_document_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("realpath_root"), NULL, ngx_http_variable_realpath_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("query_string"), NULL, ngx_http_variable_request, offsetof(ngx_http_request_t, args), NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("args"), ngx_http_variable_set_args, ngx_http_variable_request, offsetof(ngx_http_request_t, args), NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("is_args"), NULL, ngx_http_variable_is_args, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("request_filename"), NULL, ngx_http_variable_request_filename, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("server_name"), NULL, ngx_http_variable_server_name, 0, 0, 0 }, { ngx_string("request_method"), NULL, ngx_http_variable_request_method, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("remote_user"), NULL, ngx_http_variable_remote_user, 0, 0, 0 }, { ngx_string("bytes_sent"), NULL, ngx_http_variable_bytes_sent, 0, 0, 0 }, { ngx_string("body_bytes_sent"), NULL, ngx_http_variable_body_bytes_sent, 0, 0, 0 }, { ngx_string("pipe"), NULL, ngx_http_variable_pipe, 0, 0, 0 }, { ngx_string("request_completion"), NULL, ngx_http_variable_request_completion, 0, 0, 0 }, { ngx_string("request_body"), NULL, ngx_http_variable_request_body, 0, 0, 0 }, { ngx_string("request_body_file"), NULL, ngx_http_variable_request_body_file, 0, 0, 0 }, { ngx_string("request_length"), NULL, ngx_http_variable_request_length, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("request_time"), NULL, ngx_http_variable_request_time, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("request_id"), NULL, ngx_http_variable_request_id, 0, 0, 0 }, { ngx_string("status"), NULL, ngx_http_variable_status, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("sent_http_content_type"), NULL, ngx_http_variable_sent_content_type, 0, 0, 0 }, { ngx_string("sent_http_content_length"), NULL, ngx_http_variable_sent_content_length, 0, 0, 0 }, { ngx_string("sent_http_location"), NULL, ngx_http_variable_sent_location, 0, 0, 0 }, { ngx_string("sent_http_last_modified"), NULL, ngx_http_variable_sent_last_modified, 0, 0, 0 }, { ngx_string("sent_http_connection"), NULL, ngx_http_variable_sent_connection, 0, 0, 0 }, { ngx_string("sent_http_keep_alive"), NULL, ngx_http_variable_sent_keep_alive, 0, 0, 0 }, { ngx_string("sent_http_transfer_encoding"), NULL, ngx_http_variable_sent_transfer_encoding, 0, 0, 0 }, { ngx_string("sent_http_cache_control"), NULL, ngx_http_variable_headers, offsetof(ngx_http_request_t, headers_out.cache_control), 0, 0 }, { ngx_string("sent_http_link"), NULL, ngx_http_variable_headers, offsetof(ngx_http_request_t, headers_out.link), 0, 0 }, { ngx_string("limit_rate"), ngx_http_variable_set_limit_rate, ngx_http_variable_request_get_size, offsetof(ngx_http_request_t, limit_rate), NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("connection"), NULL, ngx_http_variable_connection, 0, 0, 0 }, { ngx_string("connection_requests"), NULL, ngx_http_variable_connection_requests, 0, 0, 0 }, { ngx_string("nginx_version"), NULL, ngx_http_variable_nginx_version, 0, 0, 0 }, { ngx_string("hostname"), NULL, ngx_http_variable_hostname, 0, 0, 0 }, { ngx_string("pid"), NULL, ngx_http_variable_pid, 0, 0, 0 }, { ngx_string("msec"), NULL, ngx_http_variable_msec, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("time_iso8601"), NULL, ngx_http_variable_time_iso8601, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("time_local"), NULL, ngx_http_variable_time_local, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, #if (NGX_HAVE_TCP_INFO) { ngx_string("tcpinfo_rtt"), NULL, ngx_http_variable_tcpinfo, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("tcpinfo_rttvar"), NULL, ngx_http_variable_tcpinfo, 1, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("tcpinfo_snd_cwnd"), NULL, ngx_http_variable_tcpinfo, 2, NGX_HTTP_VAR_NOCACHEABLE, 0 }, { ngx_string("tcpinfo_rcv_space"), NULL, ngx_http_variable_tcpinfo, 3, NGX_HTTP_VAR_NOCACHEABLE, 0 }, #endif { ngx_string("http_"), NULL, ngx_http_variable_unknown_header_in, 0, NGX_HTTP_VAR_PREFIX, 0 }, { ngx_string("sent_http_"), NULL, ngx_http_variable_unknown_header_out, 0, NGX_HTTP_VAR_PREFIX, 0 }, { ngx_string("sent_trailer_"), NULL, ngx_http_variable_unknown_trailer_out, 0, NGX_HTTP_VAR_PREFIX, 0 }, { ngx_string("cookie_"), NULL, ngx_http_variable_cookie, 0, NGX_HTTP_VAR_PREFIX, 0 }, { ngx_string("arg_"), NULL, ngx_http_variable_argument, 0, NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_PREFIX, 0 }, ngx_http_null_variable }; ngx_http_variable_value_t ngx_http_variable_null_value = ngx_http_variable(""); ngx_http_variable_value_t ngx_http_variable_true_value = ngx_http_variable("1"); static ngx_uint_t ngx_http_variable_depth = 100; ngx_http_variable_t * ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags) { ngx_int_t rc; ngx_uint_t i; ngx_hash_key_t *key; ngx_http_variable_t *v; ngx_http_core_main_conf_t *cmcf; if (name->len == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid variable name \"$\""); return NULL; } if (flags & NGX_HTTP_VAR_PREFIX) { return ngx_http_add_prefix_variable(cf, name, flags); } cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); key = cmcf->variables_keys->keys.elts; for (i = 0; i < cmcf->variables_keys->keys.nelts; i++) { if (name->len != key[i].key.len || ngx_strncasecmp(name->data, key[i].key.data, name->len) != 0) { continue; } v = key[i].value; if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the duplicate \"%V\" variable", name); return NULL; } if (!(flags & NGX_HTTP_VAR_WEAK)) { v->flags &= ~NGX_HTTP_VAR_WEAK; } return v; } v = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t)); if (v == NULL) { return NULL; } v->name.len = name->len; v->name.data = ngx_pnalloc(cf->pool, name->len); if (v->name.data == NULL) { return NULL; } ngx_strlow(v->name.data, name->data, name->len); v->set_handler = NULL; v->get_handler = NULL; v->data = 0; v->flags = flags; v->index = 0; rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v, 0); if (rc == NGX_ERROR) { return NULL; } if (rc == NGX_BUSY) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "conflicting variable name \"%V\"", name); return NULL; } return v; } static ngx_http_variable_t * ngx_http_add_prefix_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags) { ngx_uint_t i; ngx_http_variable_t *v; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); v = cmcf->prefix_variables.elts; for (i = 0; i < cmcf->prefix_variables.nelts; i++) { if (name->len != v[i].name.len || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0) { continue; } v = &v[i]; if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the duplicate \"%V\" variable", name); return NULL; } if (!(flags & NGX_HTTP_VAR_WEAK)) { v->flags &= ~NGX_HTTP_VAR_WEAK; } return v; } v = ngx_array_push(&cmcf->prefix_variables); if (v == NULL) { return NULL; } v->name.len = name->len; v->name.data = ngx_pnalloc(cf->pool, name->len); if (v->name.data == NULL) { return NULL; } ngx_strlow(v->name.data, name->data, name->len); v->set_handler = NULL; v->get_handler = NULL; v->data = 0; v->flags = flags; v->index = 0; return v; } ngx_int_t ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name) { ngx_uint_t i; ngx_http_variable_t *v; ngx_http_core_main_conf_t *cmcf; if (name->len == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid variable name \"$\""); return NGX_ERROR; } cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); v = cmcf->variables.elts; if (v == NULL) { if (ngx_array_init(&cmcf->variables, cf->pool, 4, sizeof(ngx_http_variable_t)) != NGX_OK) { return NGX_ERROR; } } else { for (i = 0; i < cmcf->variables.nelts; i++) { if (name->len != v[i].name.len || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0) { continue; } return i; } } v = ngx_array_push(&cmcf->variables); if (v == NULL) { return NGX_ERROR; } v->name.len = name->len; v->name.data = ngx_pnalloc(cf->pool, name->len); if (v->name.data == NULL) { return NGX_ERROR; } ngx_strlow(v->name.data, name->data, name->len); v->set_handler = NULL; v->get_handler = NULL; v->data = 0; v->flags = 0; v->index = cmcf->variables.nelts - 1; return v->index; } ngx_http_variable_value_t * ngx_http_get_indexed_variable(ngx_http_request_t *r, ngx_uint_t index) { ngx_http_variable_t *v; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); if (cmcf->variables.nelts <= index) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "unknown variable index: %ui", index); return NULL; } if (r->variables[index].not_found || r->variables[index].valid) { return &r->variables[index]; } v = cmcf->variables.elts; if (ngx_http_variable_depth == 0) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "cycle while evaluating variable \"%V\"", &v[index].name); return NULL; } ngx_http_variable_depth--; if (v[index].get_handler(r, &r->variables[index], v[index].data) == NGX_OK) { ngx_http_variable_depth++; if (v[index].flags & NGX_HTTP_VAR_NOCACHEABLE) { r->variables[index].no_cacheable = 1; } return &r->variables[index]; } ngx_http_variable_depth++; r->variables[index].valid = 0; r->variables[index].not_found = 1; return NULL; } ngx_http_variable_value_t * ngx_http_get_flushed_variable(ngx_http_request_t *r, ngx_uint_t index) { ngx_http_variable_value_t *v; v = &r->variables[index]; if (v->valid || v->not_found) { if (!v->no_cacheable) { return v; } v->valid = 0; v->not_found = 0; } return ngx_http_get_indexed_variable(r, index); } ngx_http_variable_value_t * ngx_http_get_variable(ngx_http_request_t *r, ngx_str_t *name, ngx_uint_t key) { size_t len; ngx_uint_t i, n; ngx_http_variable_t *v; ngx_http_variable_value_t *vv; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); v = ngx_hash_find(&cmcf->variables_hash, key, name->data, name->len); if (v) { if (v->flags & NGX_HTTP_VAR_INDEXED) { return ngx_http_get_flushed_variable(r, v->index); } if (ngx_http_variable_depth == 0) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "cycle while evaluating variable \"%V\"", name); return NULL; } ngx_http_variable_depth--; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv && v->get_handler(r, vv, v->data) == NGX_OK) { ngx_http_variable_depth++; return vv; } ngx_http_variable_depth++; return NULL; } vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } len = 0; v = cmcf->prefix_variables.elts; n = cmcf->prefix_variables.nelts; for (i = 0; i < cmcf->prefix_variables.nelts; i++) { if (name->len >= v[i].name.len && name->len > len && ngx_strncmp(name->data, v[i].name.data, v[i].name.len) == 0) { len = v[i].name.len; n = i; } } if (n != cmcf->prefix_variables.nelts) { if (v[n].get_handler(r, vv, (uintptr_t) name) == NGX_OK) { return vv; } return NULL; } vv->not_found = 1; return vv; } static ngx_int_t ngx_http_variable_request(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t *s; s = (ngx_str_t *) ((char *) r + data); if (s->data) { v->len = s->len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = s->data; } else { v->not_found = 1; } return NGX_OK; } #if 0 static void ngx_http_variable_request_set(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t *s; s = (ngx_str_t *) ((char *) r + data); s->len = v->len; s->data = v->data; } #endif static ngx_int_t ngx_http_variable_request_get_size(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { size_t *sp; sp = (size_t *) ((char *) r + data); v->data = ngx_pnalloc(r->pool, NGX_SIZE_T_LEN); if (v->data == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(v->data, "%uz", *sp) - v->data; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } static ngx_int_t ngx_http_variable_header(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_table_elt_t *h; h = *(ngx_table_elt_t **) ((char *) r + data); if (h) { v->len = h->value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = h->value.data; } else { v->not_found = 1; } return NGX_OK; } static ngx_int_t ngx_http_variable_cookies(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { return ngx_http_variable_headers_internal(r, v, data, ';'); } static ngx_int_t ngx_http_variable_headers(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { return ngx_http_variable_headers_internal(r, v, data, ','); } static ngx_int_t ngx_http_variable_headers_internal(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data, u_char sep) { size_t len; u_char *p, *end; ngx_uint_t i, n; ngx_array_t *a; ngx_table_elt_t **h; a = (ngx_array_t *) ((char *) r + data); n = a->nelts; h = a->elts; len = 0; for (i = 0; i < n; i++) { if (h[i]->hash == 0) { continue; } len += h[i]->value.len + 2; } if (len == 0) { v->not_found = 1; return NGX_OK; } len -= 2; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; if (n == 1) { v->len = (*h)->value.len; v->data = (*h)->value.data; return NGX_OK; } p = ngx_pnalloc(r->pool, len); if (p == NULL) { return NGX_ERROR; } v->len = len; v->data = p; end = p + len; for (i = 0; /* void */ ; i++) { if (h[i]->hash == 0) { continue; } p = ngx_copy(p, h[i]->value.data, h[i]->value.len); if (p == end) { break; } *p++ = sep; *p++ = ' '; } return NGX_OK; } static ngx_int_t ngx_http_variable_unknown_header_in(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { return ngx_http_variable_unknown_header(v, (ngx_str_t *) data, &r->headers_in.headers.part, sizeof("http_") - 1); } static ngx_int_t ngx_http_variable_unknown_header_out(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { return ngx_http_variable_unknown_header(v, (ngx_str_t *) data, &r->headers_out.headers.part, sizeof("sent_http_") - 1); } static ngx_int_t ngx_http_variable_unknown_trailer_out(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { return ngx_http_variable_unknown_header(v, (ngx_str_t *) data, &r->headers_out.trailers.part, sizeof("sent_trailer_") - 1); } ngx_int_t ngx_http_variable_unknown_header(ngx_http_variable_value_t *v, ngx_str_t *var, ngx_list_part_t *part, size_t prefix) { u_char ch; ngx_uint_t i, n; ngx_table_elt_t *header; header = part->elts; for (i = 0; /* void */ ; i++) { if (i >= part->nelts) { if (part->next == NULL) { break; } part = part->next; header = part->elts; i = 0; } if (header[i].hash == 0) { continue; } for (n = 0; n + prefix < var->len && n < header[i].key.len; n++) { ch = header[i].key.data[n]; if (ch >= 'A' && ch <= 'Z') { ch |= 0x20; } else if (ch == '-') { ch = '_'; } if (var->data[n + prefix] != ch) { break; } } if (n + prefix == var->len && n == header[i].key.len) { v->len = header[i].value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = header[i].value.data; return NGX_OK; } } v->not_found = 1; return NGX_OK; } static ngx_int_t ngx_http_variable_request_line(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p, *s; s = r->request_line.data; if (s == NULL) { s = r->request_start; if (s == NULL) { v->not_found = 1; return NGX_OK; } for (p = s; p < r->header_in->last; p++) { if (*p == CR || *p == LF) { break; } } r->request_line.len = p - s; r->request_line.data = s; } v->len = r->request_line.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = s; return NGX_OK; } static ngx_int_t ngx_http_variable_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t *name = (ngx_str_t *) data; ngx_str_t cookie, s; s.len = name->len - (sizeof("cookie_") - 1); s.data = name->data + sizeof("cookie_") - 1; if (ngx_http_parse_multi_header_lines(&r->headers_in.cookies, &s, &cookie) == NGX_DECLINED) { v->not_found = 1; return NGX_OK; } v->len = cookie.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = cookie.data; return NGX_OK; } static ngx_int_t ngx_http_variable_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t *name = (ngx_str_t *) data; u_char *arg; size_t len; ngx_str_t value; len = name->len - (sizeof("arg_") - 1); arg = name->data + sizeof("arg_") - 1; if (len == 0 || ngx_http_arg(r, arg, len, &value) != NGX_OK) { v->not_found = 1; return NGX_OK; } v->data = value.data; v->len = value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } #if (NGX_HAVE_TCP_INFO) static ngx_int_t ngx_http_variable_tcpinfo(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { struct tcp_info ti; socklen_t len; uint32_t value; len = sizeof(struct tcp_info); if (getsockopt(r->connection->fd, IPPROTO_TCP, TCP_INFO, &ti, &len) == -1) { v->not_found = 1; return NGX_OK; } v->data = ngx_pnalloc(r->pool, NGX_INT32_LEN); if (v->data == NULL) { return NGX_ERROR; } switch (data) { case 0: value = ti.tcpi_rtt; break; case 1: value = ti.tcpi_rttvar; break; case 2: value = ti.tcpi_snd_cwnd; break; case 3: value = ti.tcpi_rcv_space; break; /* suppress warning */ default: value = 0; break; } v->len = ngx_sprintf(v->data, "%uD", value) - v->data; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } #endif static ngx_int_t ngx_http_variable_content_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; if (r->headers_in.content_length) { v->len = r->headers_in.content_length->value.len; v->data = r->headers_in.content_length->value.data; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; } else if (r->reading_body) { v->not_found = 1; v->no_cacheable = 1; } else if (r->headers_in.content_length_n >= 0) { p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%O", r->headers_in.content_length_n) - p; v->data = p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; } else { v->not_found = 1; } return NGX_OK; } static ngx_int_t ngx_http_variable_host(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_core_srv_conf_t *cscf; if (r->headers_in.server.len) { v->len = r->headers_in.server.len; v->data = r->headers_in.server.data; } else { cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); v->len = cscf->server_name.len; v->data = cscf->server_name.data; } v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } static ngx_int_t ngx_http_variable_binary_remote_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif switch (r->connection->sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) r->connection->sockaddr; v->len = sizeof(struct in6_addr); v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = sin6->sin6_addr.s6_addr; break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: v->len = r->connection->addr_text.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->connection->addr_text.data; break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) r->connection->sockaddr; v->len = sizeof(in_addr_t); v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) &sin->sin_addr; break; } return NGX_OK; } static ngx_int_t ngx_http_variable_remote_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->len = r->connection->addr_text.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->connection->addr_text.data; return NGX_OK; } static ngx_int_t ngx_http_variable_remote_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_uint_t port; v->len = 0; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1); if (v->data == NULL) { return NGX_ERROR; } port = ngx_inet_get_port(r->connection->sockaddr); if (port > 0 && port < 65536) { v->len = ngx_sprintf(v->data, "%ui", port) - v->data; } return NGX_OK; } static ngx_int_t ngx_http_variable_proxy_protocol_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t *addr; ngx_proxy_protocol_t *pp; pp = r->connection->proxy_protocol; if (pp == NULL) { v->not_found = 1; return NGX_OK; } addr = (ngx_str_t *) ((char *) pp + data); v->len = addr->len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = addr->data; return NGX_OK; } static ngx_int_t ngx_http_variable_proxy_protocol_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_uint_t port; ngx_proxy_protocol_t *pp; pp = r->connection->proxy_protocol; if (pp == NULL) { v->not_found = 1; return NGX_OK; } v->len = 0; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1); if (v->data == NULL) { return NGX_ERROR; } port = *(in_port_t *) ((char *) pp + data); if (port > 0 && port < 65536) { v->len = ngx_sprintf(v->data, "%ui", port) - v->data; } return NGX_OK; } static ngx_int_t ngx_http_variable_server_addr(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t s; u_char addr[NGX_SOCKADDR_STRLEN]; s.len = NGX_SOCKADDR_STRLEN; s.data = addr; if (ngx_connection_local_sockaddr(r->connection, &s, 0) != NGX_OK) { return NGX_ERROR; } s.data = ngx_pnalloc(r->pool, s.len); if (s.data == NULL) { return NGX_ERROR; } ngx_memcpy(s.data, addr, s.len); v->len = s.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = s.data; return NGX_OK; } static ngx_int_t ngx_http_variable_server_port(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_uint_t port; v->len = 0; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; if (ngx_connection_local_sockaddr(r->connection, NULL, 0) != NGX_OK) { return NGX_ERROR; } v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1); if (v->data == NULL) { return NGX_ERROR; } port = ngx_inet_get_port(r->connection->local_sockaddr); if (port > 0 && port < 65536) { v->len = ngx_sprintf(v->data, "%ui", port) - v->data; } return NGX_OK; } static ngx_int_t ngx_http_variable_scheme(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { #if (NGX_HTTP_SSL) if (r->connection->ssl) { v->len = sizeof("https") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "https"; return NGX_OK; } #endif v->len = sizeof("http") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "http"; return NGX_OK; } static ngx_int_t ngx_http_variable_https(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { #if (NGX_HTTP_SSL) if (r->connection->ssl) { v->len = sizeof("on") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "on"; return NGX_OK; } #endif *v = ngx_http_variable_null_value; return NGX_OK; } static void ngx_http_variable_set_args(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { r->args.len = v->len; r->args.data = v->data; r->valid_unparsed_uri = 0; } static ngx_int_t ngx_http_variable_is_args(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->args.len == 0) { *v = ngx_http_variable_null_value; return NGX_OK; } v->len = 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "?"; return NGX_OK; } static ngx_int_t ngx_http_variable_document_root(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t path; ngx_http_core_loc_conf_t *clcf; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->root_lengths == NULL) { v->len = clcf->root.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = clcf->root.data; } else { if (ngx_http_script_run(r, &path, clcf->root_lengths->elts, 0, clcf->root_values->elts) == NULL) { return NGX_ERROR; } if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path) != NGX_OK) { return NGX_ERROR; } v->len = path.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = path.data; } return NGX_OK; } static ngx_int_t ngx_http_variable_realpath_root(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *real; size_t len; ngx_str_t path; ngx_http_core_loc_conf_t *clcf; #if (NGX_HAVE_MAX_PATH) u_char buffer[NGX_MAX_PATH]; #endif clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->root_lengths == NULL) { path = clcf->root; } else { if (ngx_http_script_run(r, &path, clcf->root_lengths->elts, 1, clcf->root_values->elts) == NULL) { return NGX_ERROR; } path.data[path.len - 1] = '\0'; if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path) != NGX_OK) { return NGX_ERROR; } } #if (NGX_HAVE_MAX_PATH) real = buffer; #else real = NULL; #endif real = ngx_realpath(path.data, real); if (real == NULL) { ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno, ngx_realpath_n " \"%s\" failed", path.data); return NGX_ERROR; } len = ngx_strlen(real); v->data = ngx_pnalloc(r->pool, len); if (v->data == NULL) { #if !(NGX_HAVE_MAX_PATH) ngx_free(real); #endif return NGX_ERROR; } v->len = len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; ngx_memcpy(v->data, real, len); #if !(NGX_HAVE_MAX_PATH) ngx_free(real); #endif return NGX_OK; } static ngx_int_t ngx_http_variable_request_filename(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { size_t root; ngx_str_t path; if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) { return NGX_ERROR; } /* ngx_http_map_uri_to_path() allocates memory for terminating '\0' */ v->len = path.len - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = path.data; return NGX_OK; } static ngx_int_t ngx_http_variable_server_name(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_core_srv_conf_t *cscf; cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); v->len = cscf->server_name.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = cscf->server_name.data; return NGX_OK; } static ngx_int_t ngx_http_variable_request_method(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->main->method_name.data) { v->len = r->main->method_name.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->main->method_name.data; } else { v->not_found = 1; } return NGX_OK; } static ngx_int_t ngx_http_variable_remote_user(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_int_t rc; rc = ngx_http_auth_basic_user(r); if (rc == NGX_DECLINED) { v->not_found = 1; return NGX_OK; } if (rc == NGX_ERROR) { return NGX_ERROR; } v->len = r->headers_in.user.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->headers_in.user.data; return NGX_OK; } static ngx_int_t ngx_http_variable_bytes_sent(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%O", r->connection->sent) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_body_bytes_sent(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { off_t sent; u_char *p; sent = r->connection->sent - r->header_size; if (sent < 0) { sent = 0; } p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%O", sent) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_pipe(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->data = (u_char *) (r->pipeline ? "p" : "."); v->len = 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } static ngx_int_t ngx_http_variable_status(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_uint_t status; v->data = ngx_pnalloc(r->pool, NGX_INT_T_LEN); if (v->data == NULL) { return NGX_ERROR; } if (r->err_status) { status = r->err_status; } else if (r->headers_out.status) { status = r->headers_out.status; } else if (r->http_version == NGX_HTTP_VERSION_9) { status = 9; } else { status = 0; } v->len = ngx_sprintf(v->data, "%03ui", status) - v->data; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } static ngx_int_t ngx_http_variable_sent_content_type(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->headers_out.content_type.len) { v->len = r->headers_out.content_type.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->headers_out.content_type.data; } else { v->not_found = 1; } return NGX_OK; } static ngx_int_t ngx_http_variable_sent_content_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; if (r->headers_out.content_length) { v->len = r->headers_out.content_length->value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->headers_out.content_length->value.data; return NGX_OK; } if (r->headers_out.content_length_n >= 0) { p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%O", r->headers_out.content_length_n) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } v->not_found = 1; return NGX_OK; } static ngx_int_t ngx_http_variable_sent_location(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_str_t name; if (r->headers_out.location) { v->len = r->headers_out.location->value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->headers_out.location->value.data; return NGX_OK; } ngx_str_set(&name, "sent_http_location"); return ngx_http_variable_unknown_header(v, &name, &r->headers_out.headers.part, sizeof("sent_http_") - 1); } static ngx_int_t ngx_http_variable_sent_last_modified(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; if (r->headers_out.last_modified) { v->len = r->headers_out.last_modified->value.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->headers_out.last_modified->value.data; return NGX_OK; } if (r->headers_out.last_modified_time >= 0) { p = ngx_pnalloc(r->pool, sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1); if (p == NULL) { return NGX_ERROR; } v->len = ngx_http_time(p, r->headers_out.last_modified_time) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } v->not_found = 1; return NGX_OK; } static ngx_int_t ngx_http_variable_sent_connection(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { size_t len; char *p; if (r->headers_out.status == NGX_HTTP_SWITCHING_PROTOCOLS) { len = sizeof("upgrade") - 1; p = "upgrade"; } else if (r->keepalive) { len = sizeof("keep-alive") - 1; p = "keep-alive"; } else { len = sizeof("close") - 1; p = "close"; } v->len = len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) p; return NGX_OK; } static ngx_int_t ngx_http_variable_sent_keep_alive(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; ngx_http_core_loc_conf_t *clcf; if (r->keepalive) { clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->keepalive_header) { p = ngx_pnalloc(r->pool, sizeof("timeout=") - 1 + NGX_TIME_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "timeout=%T", clcf->keepalive_header) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } } v->not_found = 1; return NGX_OK; } static ngx_int_t ngx_http_variable_sent_transfer_encoding(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->chunked) { v->len = sizeof("chunked") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "chunked"; } else { v->not_found = 1; } return NGX_OK; } static void ngx_http_variable_set_limit_rate(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ssize_t s; ngx_str_t val; val.len = v->len; val.data = v->data; s = ngx_parse_size(&val); if (s == NGX_ERROR) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid $limit_rate \"%V\"", &val); return; } r->limit_rate = s; r->limit_rate_set = 1; } static ngx_int_t ngx_http_variable_request_completion(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->request_complete) { v->len = 2; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "OK"; return NGX_OK; } *v = ngx_http_variable_null_value; return NGX_OK; } static ngx_int_t ngx_http_variable_request_body(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; size_t len; ngx_buf_t *buf; ngx_chain_t *cl; if (r->request_body == NULL || r->request_body->bufs == NULL || r->request_body->temp_file) { v->not_found = 1; return NGX_OK; } cl = r->request_body->bufs; buf = cl->buf; if (cl->next == NULL) { v->len = buf->last - buf->pos; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = buf->pos; return NGX_OK; } len = buf->last - buf->pos; cl = cl->next; for ( /* void */ ; cl; cl = cl->next) { buf = cl->buf; len += buf->last - buf->pos; } p = ngx_pnalloc(r->pool, len); if (p == NULL) { return NGX_ERROR; } v->data = p; cl = r->request_body->bufs; for ( /* void */ ; cl; cl = cl->next) { buf = cl->buf; p = ngx_cpymem(p, buf->pos, buf->last - buf->pos); } v->len = len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; return NGX_OK; } static ngx_int_t ngx_http_variable_request_body_file(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->request_body == NULL || r->request_body->temp_file == NULL) { v->not_found = 1; return NGX_OK; } v->len = r->request_body->temp_file->file.name.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = r->request_body->temp_file->file.name.data; return NGX_OK; } static ngx_int_t ngx_http_variable_request_length(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%O", r->request_length) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_request_time(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; ngx_time_t *tp; ngx_msec_int_t ms; p = ngx_pnalloc(r->pool, NGX_TIME_T_LEN + 4); if (p == NULL) { return NGX_ERROR; } tp = ngx_timeofday(); ms = (ngx_msec_int_t) ((tp->sec - r->start_sec) * 1000 + (tp->msec - r->start_msec)); ms = ngx_max(ms, 0); v->len = ngx_sprintf(p, "%T.%03M", (time_t) ms / 1000, ms % 1000) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_request_id(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *id; #if (NGX_OPENSSL) u_char random_bytes[16]; #endif id = ngx_pnalloc(r->pool, 32); if (id == NULL) { return NGX_ERROR; } v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->len = 32; v->data = id; #if (NGX_OPENSSL) if (RAND_bytes(random_bytes, 16) == 1) { ngx_hex_dump(id, random_bytes, 16); return NGX_OK; } ngx_ssl_error(NGX_LOG_ERR, r->connection->log, 0, "RAND_bytes() failed"); #endif ngx_sprintf(id, "%08xD%08xD%08xD%08xD", (uint32_t) ngx_random(), (uint32_t) ngx_random(), (uint32_t) ngx_random(), (uint32_t) ngx_random()); return NGX_OK; } static ngx_int_t ngx_http_variable_connection(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, NGX_ATOMIC_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%uA", r->connection->number) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_connection_requests(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, NGX_INT_T_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%ui", r->connection->requests) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_nginx_version(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->len = sizeof(NGINX_VERSION) - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) NGINX_VERSION; return NGX_OK; } static ngx_int_t ngx_http_variable_hostname(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->len = ngx_cycle->hostname.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ngx_cycle->hostname.data; return NGX_OK; } static ngx_int_t ngx_http_variable_pid(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, NGX_INT64_LEN); if (p == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(p, "%P", ngx_pid) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_msec(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; ngx_time_t *tp; p = ngx_pnalloc(r->pool, NGX_TIME_T_LEN + 4); if (p == NULL) { return NGX_ERROR; } tp = ngx_timeofday(); v->len = ngx_sprintf(p, "%T.%03M", tp->sec, tp->msec) - p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_time_iso8601(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, ngx_cached_http_log_iso8601.len); if (p == NULL) { return NGX_ERROR; } ngx_memcpy(p, ngx_cached_http_log_iso8601.data, ngx_cached_http_log_iso8601.len); v->len = ngx_cached_http_log_iso8601.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } static ngx_int_t ngx_http_variable_time_local(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; p = ngx_pnalloc(r->pool, ngx_cached_http_log_time.len); if (p == NULL) { return NGX_ERROR; } ngx_memcpy(p, ngx_cached_http_log_time.data, ngx_cached_http_log_time.len); v->len = ngx_cached_http_log_time.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = p; return NGX_OK; } void * ngx_http_map_find(ngx_http_request_t *r, ngx_http_map_t *map, ngx_str_t *match) { void *value; u_char *low; size_t len; ngx_uint_t key; len = match->len; if (len) { low = ngx_pnalloc(r->pool, len); if (low == NULL) { return NULL; } } else { low = NULL; } key = ngx_hash_strlow(low, match->data, len); value = ngx_hash_find_combined(&map->hash, key, low, len); if (value) { return value; } #if (NGX_PCRE) if (len && map->nregex) { ngx_int_t n; ngx_uint_t i; ngx_http_map_regex_t *reg; reg = map->regex; for (i = 0; i < map->nregex; i++) { n = ngx_http_regex_exec(r, reg[i].regex, match); if (n == NGX_OK) { return reg[i].value; } if (n == NGX_DECLINED) { continue; } /* NGX_ERROR */ return NULL; } } #endif return NULL; } #if (NGX_PCRE) static ngx_int_t ngx_http_variable_not_found(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->not_found = 1; return NGX_OK; } ngx_http_regex_t * ngx_http_regex_compile(ngx_conf_t *cf, ngx_regex_compile_t *rc) { u_char *p; size_t size; ngx_str_t name; ngx_uint_t i, n; ngx_http_variable_t *v; ngx_http_regex_t *re; ngx_http_regex_variable_t *rv; ngx_http_core_main_conf_t *cmcf; rc->pool = cf->pool; if (ngx_regex_compile(rc) != NGX_OK) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V", &rc->err); return NULL; } re = ngx_pcalloc(cf->pool, sizeof(ngx_http_regex_t)); if (re == NULL) { return NULL; } re->regex = rc->regex; re->ncaptures = rc->captures; re->name = rc->pattern; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); cmcf->ncaptures = ngx_max(cmcf->ncaptures, re->ncaptures); n = (ngx_uint_t) rc->named_captures; if (n == 0) { return re; } rv = ngx_palloc(rc->pool, n * sizeof(ngx_http_regex_variable_t)); if (rv == NULL) { return NULL; } re->variables = rv; re->nvariables = n; size = rc->name_size; p = rc->names; for (i = 0; i < n; i++) { rv[i].capture = 2 * ((p[0] << 8) + p[1]); name.data = &p[2]; name.len = ngx_strlen(name.data); v = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); if (v == NULL) { return NULL; } rv[i].index = ngx_http_get_variable_index(cf, &name); if (rv[i].index == NGX_ERROR) { return NULL; } v->get_handler = ngx_http_variable_not_found; p += size; } return re; } ngx_int_t ngx_http_regex_exec(ngx_http_request_t *r, ngx_http_regex_t *re, ngx_str_t *s) { ngx_int_t rc, index; ngx_uint_t i, n, len; ngx_http_variable_value_t *vv; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); if (re->ncaptures) { len = cmcf->ncaptures; if (r->captures == NULL || r->realloc_captures) { r->realloc_captures = 0; r->captures = ngx_palloc(r->pool, len * sizeof(int)); if (r->captures == NULL) { return NGX_ERROR; } } } else { len = 0; } rc = ngx_regex_exec(re->regex, s, r->captures, len); if (rc == NGX_REGEX_NO_MATCHED) { return NGX_DECLINED; } if (rc < 0) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, ngx_regex_exec_n " failed: %i on \"%V\" using \"%V\"", rc, s, &re->name); return NGX_ERROR; } for (i = 0; i < re->nvariables; i++) { n = re->variables[i].capture; index = re->variables[i].index; vv = &r->variables[index]; vv->len = r->captures[n + 1] - r->captures[n]; vv->valid = 1; vv->no_cacheable = 0; vv->not_found = 0; vv->data = &s->data[r->captures[n]]; #if (NGX_DEBUG) { ngx_http_variable_t *v; v = cmcf->variables.elts; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http regex set $%V to \"%v\"", &v[index].name, vv); } #endif } r->ncaptures = rc * 2; r->captures_data = s->data; return NGX_OK; } #endif ngx_int_t ngx_http_variables_add_core_vars(ngx_conf_t *cf) { ngx_http_variable_t *cv, *v; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); cmcf->variables_keys = ngx_pcalloc(cf->temp_pool, sizeof(ngx_hash_keys_arrays_t)); if (cmcf->variables_keys == NULL) { return NGX_ERROR; } cmcf->variables_keys->pool = cf->pool; cmcf->variables_keys->temp_pool = cf->pool; if (ngx_hash_keys_array_init(cmcf->variables_keys, NGX_HASH_SMALL) != NGX_OK) { return NGX_ERROR; } if (ngx_array_init(&cmcf->prefix_variables, cf->pool, 8, sizeof(ngx_http_variable_t)) != NGX_OK) { return NGX_ERROR; } for (cv = ngx_http_core_variables; cv->name.len; cv++) { v = ngx_http_add_variable(cf, &cv->name, cv->flags); if (v == NULL) { return NGX_ERROR; } *v = *cv; } return NGX_OK; } ngx_int_t ngx_http_variables_init_vars(ngx_conf_t *cf) { size_t len; ngx_uint_t i, n; ngx_hash_key_t *key; ngx_hash_init_t hash; ngx_http_variable_t *v, *av, *pv; ngx_http_core_main_conf_t *cmcf; /* set the handlers for the indexed http variables */ cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); v = cmcf->variables.elts; pv = cmcf->prefix_variables.elts; key = cmcf->variables_keys->keys.elts; for (i = 0; i < cmcf->variables.nelts; i++) { for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) { av = key[n].value; if (v[i].name.len == key[n].key.len && ngx_strncmp(v[i].name.data, key[n].key.data, v[i].name.len) == 0) { v[i].get_handler = av->get_handler; v[i].data = av->data; av->flags |= NGX_HTTP_VAR_INDEXED; v[i].flags = av->flags; av->index = i; if (av->get_handler == NULL || (av->flags & NGX_HTTP_VAR_WEAK)) { break; } goto next; } } len = 0; av = NULL; for (n = 0; n < cmcf->prefix_variables.nelts; n++) { if (v[i].name.len >= pv[n].name.len && v[i].name.len > len && ngx_strncmp(v[i].name.data, pv[n].name.data, pv[n].name.len) == 0) { av = &pv[n]; len = pv[n].name.len; } } if (av) { v[i].get_handler = av->get_handler; v[i].data = (uintptr_t) &v[i].name; v[i].flags = av->flags; goto next; } if (v[i].get_handler == NULL) { ngx_log_error(NGX_LOG_EMERG, cf->log, 0, "unknown \"%V\" variable", &v[i].name); return NGX_ERROR; } next: continue; } for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) { av = key[n].value; if (av->flags & NGX_HTTP_VAR_NOHASH) { key[n].key.data = NULL; } } hash.hash = &cmcf->variables_hash; hash.key = ngx_hash_key; hash.max_size = cmcf->variables_hash_max_size; hash.bucket_size = cmcf->variables_hash_bucket_size; hash.name = "variables_hash"; hash.pool = cf->pool; hash.temp_pool = NULL; if (ngx_hash_init(&hash, cmcf->variables_keys->keys.elts, cmcf->variables_keys->keys.nelts) != NGX_OK) { return NGX_ERROR; } cmcf->variables_keys = NULL; return NGX_OK; }