Comments (1)
Unfortunately, the WebSocket protocol does not provide any specific mechanism for providing a close code or reason at this stage when rejecting a client connection.
In reality, connections should be rejected at this stage only when you are rejecting a user from a disallowed origin (i.e. someone from another website is trying to connect users to your websocket server without permission) or when a user otherwise does not have permission to connect (i.e. they are not logged in). The latter case should be handled by other code on your site: a user should not be able to attempt to connect the websocket connection if they are not logged in.
The code and reason that WebSocket-Node allow you to specify here are an HTTP Status code (e.g. 404, 500, etc.) and a reason to include as a non-standard "X-WebSocket-Reject-Reason" HTTP header in the response. It is mostly useful when analyzing the connection with a packet sniffer, such as WireShark. No browser has any facility for providing rejection codes or reasons to the client-side JavaScript code when a connection is rejected in this way, because it's not provided for in the WebSocket specification.
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