Fiddler/Core can't decode data from Chrome WebSockets

[tosun...@gmail.com]

Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits

When the request header has compression enabled Fiddler and FiddlerCore fail to decode the payload in Chrome Version 66.0.3359.181 (Official Build) (64-bit) but it works fine with Microsoft Edge.

The first image is from Chrome, the second one is from Edge.

[EricLaw]

See https://fiddler.ideas.aha.io/ideas/FID-I-103 for the workaround.

[tosun...@gmail.com]

I think removing the Sec-WebSocket-Extensions header won't help because its already sent from the client, we just remove it before reaching the server.

Server may send uncompressed messages but the client can keep responding in compressed format?

[Eric Lawrence]

In a properly-functioning system, the client won't send compressed messages unless the server advertises that it supports them.

[Jerry Lee Daniel]

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