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HttpListenerContext.AcceptWebSocketAsync Method (String, TimeSpan)

.NET Framework 4.6 and 4.5

Accept a WebSocket connection specifying the supported WebSocket sub-protocol and WebSocket keep-alive interval as an asynchronous operation.

Namespace:  System.Net
Assembly:  System (in System.dll)

public Task<HttpListenerWebSocketContext> AcceptWebSocketAsync(
	string subProtocol,
	TimeSpan keepAliveInterval
)

Parameters

subProtocol
Type: System.String

The supported WebSocket sub-protocol.

keepAliveInterval
Type: System.TimeSpan

The WebSocket protocol keep-alive interval in milliseconds.

Return Value

Type: System.Threading.Tasks.Task<HttpListenerWebSocketContext>
Returns Task<TResult>.
The task object representing the asynchronous operation. The Result property on the task object returns an HttpListenerWebSocketContext object.

ExceptionCondition
ArgumentException

subProtocol is an empty string

-or-

subProtocol contains illegal characters.

ArgumentOutOfRangeException

keepAliveInterval is too small.

WebSocketException

An error occurred when sending the response to complete the WebSocket handshake.

This operation will not block. The returned Task<TResult> object will complete after the WebSocket connection has been accepted.

The size of the receive buffer is 16,385 bytes.

.NET Framework

Supported in: 4.6, 4.5
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