一个服务器上配置多个外网IP ,HttpWebRequest实现指定IP的域名请求(也可以考虑使用代理实现)
需要使用HttpWebRequest的ServicePoint.BindIPEndPointDelegate代理实现
注:(如果IP指定错误,服务器好像会使用默认最优先IP请求)
/// <summary> /// 通过设置这个属性,可以在发出连接的时候绑定客户端发出连接所使用的IP地址。 /// </summary> /// <param name="servicePoint"></param> /// <param name="remoteEndPoint"></param> /// <param name="retryCount"></param> /// <returns></returns> public static IPEndPoint BindIPEndPointCallback(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount) { return new IPEndPoint(IPAddress.Parse("192.168.1.1"), 0);//端口号 } /// <summary> /// 一个服务器上面配置多个IP 固定出网IP /// </summary> public static void MakeRequest() { HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.baidu.com"); //设置本地的出口ip和端口 request.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPointCallback); if (ServicePointManager.DefaultConnectionLimit < 10) { ServicePointManager.DefaultConnectionLimit = 10; } //req.ServicePoint.ConnectionLimit=int.Max; //允许最大连接数 HttpWebResponse response = (HttpWebResponse)request.GetResponse(); response.ToString(); }
也可以直接写成
request.ServicePoint.BindIPEndPointDelegate = delegate { return new IPEndPoint(IPAddress.Parse(ip), 0); };