Read and respond to a WebSocket HTTP Upgrade request.
template< class ConstBufferSequence> void accept( ConstBufferSequence const& buffers);
This function is used to perform the WebSocket handshake, required before messages can be sent and received. During the handshake, the client sends the Websocket Upgrade HTTP request, and the server replies with an HTTP response indicating the result of the handshake. The call blocks until one of the following conditions is true:
The algorithm, known as a composed operation, is
implemented in terms of calls to the next layer's
If a valid upgrade request is received, an HTTP response with a status-code
beast::http::status::switching_protocols is sent
to the peer, otherwise a non-successful error is associated with the
operation. If the request size exceeds the capacity of the stream's internal
buffer, the error
error::buffer_overflow will be indicated.
To handle larger requests, an application should read the HTTP request
http::read and then pass the request
to the appropriate overload of
Caller provided data that has already been received on the stream. The implementation will copy the caller provided data before the function returns.
Thrown on failure.