23 lines
748 B
Python
23 lines
748 B
Python
"""Process individual messages from a WebSocket connection."""
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import re
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from mitmproxy import ctx, http
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def websocket_message(flow: http.HTTPFlow):
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assert flow.websocket is not None # make type checker happy
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# get the latest message
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message = flow.websocket.messages[-1]
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# was the message sent from the client or server?
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if message.from_client:
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ctx.log.info(f"Client sent a message: {message.content!r}")
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else:
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ctx.log.info(f"Server sent a message: {message.content!r}")
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# manipulate the message content
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message.content = re.sub(rb"^Hello", b"HAPPY", message.content)
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if b"FOOBAR" in message.content:
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# kill the message and not send it to the other endpoint
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message.drop()
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