【rails】request.env

　　　　api中木有找到。

　　　　request.env对象获取客户端用户和本地的一些信息，如下：

SERVER_NAME

PATH_INFO

REMOTE_HOST

HTTP_ACCEPT_ENCODING

HTTP_USER_AGENT

SERVER_PROTOCOL

HTTP_CACHE_CONTROL

HTTP_ACCEPT_LANGUAGE

HTTP_HOST

REMOTE_ADDR

SERVER_SOFTWARE

HTTP_KEEP_ALIVE

HTTP_REFERER

HTTP_COOKIE

HTTP_ACCEPT_CHARSET

REQUEST_URI

SERVER_PORT

GATEWAY_INTERFACE

QUERY_STRING

REMOTE_USER

HTTP_ACCEPT

REQUEST_METHOD

HTTP_CONNECTION