.NET - 获取协议,主机和端口

using System;
using System.Web;

public class SampleClass : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        string protocol = context.Request.ServerVariables["SERVER_PROTOCOL"];
        string host = context.Request.ServerVariables["HTTP_HOST"];
        string port = context.Request.ServerVariables["SERVER_PORT"];

        context.Response.Write("Protocol: " + protocol + "<br>");
        context.Response.Write("Host: " + host + "<br>");
        context.Response.Write("Port: " + port + "<br>");
    }

    public bool IsReusable
    {
        get { return false; }
    }
}