转自：http://zool.me/rails/rails-in-some-of-the-ways-to-obtain-information-url/
如本机我测试域名为test.blog.zool.it:3000
打开的uri为 /post/Hello-World
fullurl为 http://test.blog.zool.it:3000/post/Hello-world
则rails的路由生成一下几个方法
domain(tld_length = 1)
取得域名
request.domain #=> zool.it request.domain(2) #=> blog.zool.it subdomain(tld_length = 1)
subdomains(tld_length = 1)
取得子域名
request.subdomain #=> "test.blog" request.subdomain(2) #=> "test" request.subdomain #=> ["test", "blog"] request.subdomain(2) #=> ["test"] host()
取得主机名
request.host #=> "test.blog.zool.it" host_with_port()
取得带端口的主机名
request.host_with_port #=> "test.blog.zool.it:3000" raw_host_with_port()
代理服务器的主机名和端口
request.raw_host_with_port #=> "test.blog.zool.it:3000" port()
取得由raw_host_with_port()获得的端口数值
request.port #=> 3000 port_string()
取得raw_host_with_port()获得的端口文本字符串
request.port_string #=> ":3000" protocol()
取得当前使用网络协议
request.protocol #=> "http://" scheme()
取得网络协议
request.scheme #=> "http" request_uri()
request请求的uri地址
request.request_uri #=> "/posts/Hello-World" server_port
server_port()
取得由env['SERVER_PORT']返回的端口值
request.server_port #=> "3000" ssl?()
当前是否在是用https加密协议
request.ssl?() #=> false standard_port()
返回网络协议标准端口(http为80, https为443)
request.standard_port #=> 80 standard_port?()
判断当前协议是否是标准端口
request.standard_port? #=> false url()
取得当前requset完整url
request.url #=> "http://test.blog.zool.it:3000/posts/Hello-World"