Dial dials a websocket and returns a new Conn.

Upgrade upgrades an HTTP handler and returns an new *Conn.

CloseRecvTimeout is the amount of time waiting during Close for the remote peer to send a Close message before shutting down the connection.

HandshakeTimeout is the amount of time to wait for the connection handshake to complete.

SendTimeout is the amount of time to wait on a Send before giving up.

ErrCloseSent is returned by Send if sending to a connection that is closing.

A Conn is a websocket connection.

A HandshakeError is returned if Dial fails the handshake.