nginx全局變量

經常需要配置Nginx ，其中有許多以 $ 開頭的變量，經常需要查閱nginx 所支持的變量。

可能是對 Ngixn資源不熟悉，干脆就直接讀源碼，分析出支持的變量。

Nginx支持的http變量實現在 ngx_http_variables.c 的 ngx_http_core_variables存儲實現：

ngx_http_core_variables
 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_PROXY || NGX_HTTP_REALIP)
     { ngx_string("http_x_forwarded_for"), NULL, ngx_http_variable_header,
       offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0, 0 },
 #endif
 
     { ngx_string("http_cookie"), NULL, ngx_http_variable_headers,
       offsetof(ngx_http_request_t, headers_in.cookies), 0, 0 },
 
     { ngx_string("content_length"), NULL, ngx_http_variable_header,
       offsetof(ngx_http_request_t, headers_in.content_length), 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("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("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_request_set,
       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("body_bytes_sent"), NULL, ngx_http_variable_body_bytes_sent,
       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("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("limit_rate"), ngx_http_variable_request_set_size,
       ngx_http_variable_request_get_size,
       offsetof(ngx_http_request_t, limit_rate),
       NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 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_null_string, NULL, NULL, 0, 0, 0 }
 };

把這些變量提取下，總結如下：




已Excel形式提供，方便查詢：

http://files.cnblogs.com/AloneSword/nginx%E5%86%85%E7%BD%AE%E5%8F%98%E9%87%8F.rar

轉載地址：http://www.cnblogs.com/AloneSword/archive/2011/12/10/2283483.html