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f90b4c2ff0
Many addons currently save options on configure(), either as individual options or sometimes by saving the entire options object. The current options should simply be available on the ctx object, simplifying state management for addons considerably.
39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
import mitmproxy
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class DisableH2C:
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"""
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We currently only support HTTP/2 over a TLS connection.
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Some clients try to upgrade a connection from HTTP/1.1 to h2c. We need to
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remove those headers to avoid protocol errors if one endpoints suddenly
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starts sending HTTP/2 frames.
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Some clients might use HTTP/2 Prior Knowledge to directly initiate a session
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by sending the connection preface. We just kill those flows.
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"""
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def process_flow(self, f):
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if f.request.headers.get('upgrade', '') == 'h2c':
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mitmproxy.ctx.log.warn("HTTP/2 cleartext connections (h2c upgrade requests) are currently not supported.")
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del f.request.headers['upgrade']
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if 'connection' in f.request.headers:
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del f.request.headers['connection']
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if 'http2-settings' in f.request.headers:
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del f.request.headers['http2-settings']
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is_connection_preface = (
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f.request.method == 'PRI' and
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f.request.path == '*' and
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f.request.http_version == 'HTTP/2.0'
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)
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if is_connection_preface:
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f.kill()
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mitmproxy.ctx.log.warn("Initiating HTTP/2 connections with prior knowledge are currently not supported.")
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# Handlers
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def request(self, f):
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self.process_flow(f)
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