HttpListenerRequest.KeepAlive 属性

定义

命名空间:

System.Net

程序集:

System.Net.HttpListener.dll

Source:

HttpListenerRequest.cs

获取一个 Boolean 值，该值指示客户端是否请求持久性连接。

public:
 property bool KeepAlive { bool get(); };

public bool KeepAlive { get; }

member this.KeepAlive : bool

Public ReadOnly Property KeepAlive As Boolean

属性值

Boolean

如果连接应保持打开状态，则为 true；否则为 false。

示例

下面的代码示例演示如何使用此属性。

public static void ShowRequestProperties2 (HttpListenerRequest request)
{
    Console.WriteLine("KeepAlive: {0}", request.KeepAlive);
    Console.WriteLine("Local end point: {0}", request.LocalEndPoint.ToString());
    Console.WriteLine("Remote end point: {0}", request.RemoteEndPoint.ToString());
    Console.WriteLine("Is local? {0}", request.IsLocal);
    Console.WriteLine("HTTP method: {0}", request.HttpMethod);
    Console.WriteLine("Protocol version: {0}", request.ProtocolVersion);
    Console.WriteLine("Is authenticated: {0}", request.IsAuthenticated);
    Console.WriteLine("Is secure: {0}", request.IsSecureConnection);
}

Public Shared Sub ShowRequestProperties2(ByVal request As HttpListenerRequest)
    Console.WriteLine("KeepAlive: {0}", request.KeepAlive)
    Console.WriteLine("Local end point: {0}", request.LocalEndPoint.ToString())
    Console.WriteLine("Remote end point: {0}", request.RemoteEndPoint.ToString())
    Console.WriteLine("Is local? {0}", request.IsLocal)
    Console.WriteLine("HTTP method: {0}", request.HttpMethod)
    Console.WriteLine("Protocol version: {0}", request.ProtocolVersion)
    Console.WriteLine("Is authenticated: {0}", request.IsAuthenticated)
    Console.WriteLine("Is secure: {0}", request.IsSecureConnection)
End Sub

注解

如果 HTTP 客户端和服务器希望在短时间内多次交换数据，则持久连接可避免打开和关闭每条消息的 TCP 连接所需的开销，从而加快通信速度。 对于使用 HTTP/1.1 的客户端，此属性的默认值为 true。

另请参阅

• HttpListener
• HttpListenerContext
• HttpListenerResponse