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How can a greasemonkey script / Chrome's user-script intercept a running websocket communication?
My goal is to have additional statistics for a in-browser game
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First, you need to copy your web browser's header to here and use json. dumps to convert it into the string format. After that, create the connection to the server by using create_connection . Then, perform the handshake by sending the message, and you will be able to see the data on your side.
To open a websocket connection, we need to create new WebSocket using the special protocol ws in the url: let socket = new WebSocket("ws://javascript.info"); There's also encrypted wss:// protocol. It's like HTTPS for websockets.
The wss protocol establishes a WebSocket over an encrypted TLS connection, while the ws protocol uses an unencrypted connection. At this point, the network connection remains open and can be used to send WebSocket messages in either direction.
Node. js can maintain many hundreds of WebSockets connections simultaneously. WebSockets on the server can become complicated as the connection upgrade from HTTP to WebSockets requires handling. This is why developers commonly use a library to manage this for them.
You may use Firefox, then add the Firebug module then add & use websocket-monitor module to monitor websocket.
If you want to hook websocket from javascript you may also use wshook.
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