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Cannot modify HTTP/2 responses

See original GitHub issue

Steps to reproduce the problem:

Perhaps I’m missing something here, but I cannot seem to modify HTTP/2 responses. HTTP/1.1 works fine. The following script breaks when the browser attempts to use HTTP/2:

def response(flow):
	flow.response.headers['X-Filtered'] = 'true'

Invoked with mitmproxy -T --host -s script.py.

Any other comments? What have you tried so far?

If I additionally add --no-http2, the script works correctly. If the browser does not use HTTP/2, everything also works as expected.

System information

Mitmproxy version: 2.0.1 (release version) Precompiled Binary
Python version: 3.5.2
Platform: Linux-3.16.0-4-amd64-x86_64-with-debian-8.7
SSL version: OpenSSL 1.1.0e  16 Feb 2017
Linux distro: debian 8.7

Issue Analytics

State:
Created 6 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

1reaction

mhilscommented, Apr 25, 2017

Can you be more specific regarding “breaks”? Does it work if you specify the header name as lowercase?

0reactions

Kriechicommented, Apr 26, 2017

This should be fixed already in git-master: https://github.com/mitmproxy/mitmproxy/pull/2055/files

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