Create a new WebSocket connection. The URL supplied in url must use the scheme ws or wss.
Create a new WebSocket connection. The URL supplied in url
must use the scheme ws
or wss
.
The protocols argument is specifying the subprotocols the client is willing to speak.
The headers argument is specifying additional HTTP headers for
setting up the connection. This would typically be the Origin
header and potentially cookies. The keys of the map are the header
fields and the values are either String or List<String>.
If headers is provided, there are a number of headers which are controlled by the WebSocket connection process. These headers are:
connection
sec-websocket-key
sec-websocket-protocol
sec-websocket-version
upgrade
If any of these are passed in the headers
map they will be ignored.
If the url
contains user information this will be passed as basic
authentication when setting up the connection.