Unable to upgrade connection when using compression

[escoand]

Title

Summary

Combination of --enable-compression and upgrading connection to WebSocket is not possible.

Environment

• OS: Alpine Linux
• Kernel (e.g. uname -a): Linux f54ee906-7482-4341-421b-d0fa 4.15.0-106-generic #107~16.04.1-Ubuntu SMP Thu Jun 4 15:40:05 UTC 2020 x86_64 Linux
• Go (e.g. go version)
• Server (e.g. Keycloak or any other IdP): Keycloak
• Louketo: 1.0.0

Expected Results

Upgrading and compression are working together without problems.

Actual Results

2020-07-20T08:29:05.077Z error louketo-proxy/forwarding.go:77 failed to upgrade connection {"error": "writer does not implement http.Hijacker method"}

Steps to reproduce

Additional Information