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HttpListenerContext.AcceptWebSocketAsync Method (String, Int32, TimeSpan, ArraySegment<Byte>)

.NET Framework 4.6 and 4.5

Accept a WebSocket connection specifying the supported WebSocket sub-protocol, receive buffer size, WebSocket keep-alive interval, and the internal buffer as an asynchronous operation.

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

public Task<HttpListenerWebSocketContext> AcceptWebSocketAsync(
	string subProtocol,
	int receiveBufferSize,
	TimeSpan keepAliveInterval,
	ArraySegment<byte> internalBuffer
)

Parameters

subProtocol
Type: System.String

The supported WebSocket sub-protocol.

receiveBufferSize
Type: System.Int32

The receive buffer size in bytes.

keepAliveInterval
Type: System.TimeSpan

The WebSocket protocol keep-alive interval in milliseconds.

internalBuffer
Type: System.ArraySegment<Byte>

An internal buffer to use for this operation.

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.

-or-

receiveBufferSize is less than 16 bytes

-or-

receiveBufferSize is greater than 64K bytes.

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.

.NET Framework

Supported in: 4.6, 4.5
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