46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""
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Inject a WebSocket message into a running connection.
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This example shows how to inject a WebSocket message into a running connection.
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"""
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import asyncio
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from mitmproxy import ctx
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from mitmproxy import http
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# Simple example: Inject a message as a response to an event
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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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last_message = flow.websocket.messages[-1]
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if last_message.is_text and "secret" in last_message.text:
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last_message.drop()
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ctx.master.commands.call(
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"inject.websocket", flow, last_message.from_client, b"ssssssh"
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)
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# Complex example: Schedule a periodic timer
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async def inject_async(flow: http.HTTPFlow):
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msg = "hello from mitmproxy! "
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assert flow.websocket is not None # make type checker happy
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while flow.websocket.timestamp_end is None:
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ctx.master.commands.call("inject.websocket", flow, True, msg.encode())
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await asyncio.sleep(1)
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msg = msg[1:] + msg[:1]
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# Python 3.11: replace with TaskGroup
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tasks = set()
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def websocket_start(flow: http.HTTPFlow):
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# we need to hold a reference to the task, otherwise it will be garbage collected.
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t = asyncio.create_task(inject_async(flow))
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tasks.add(t)
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t.add_done_callback(tasks.remove)
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