Duplicate values in CORS header when using socket.io

[ricwo]

Rasa version: 1.1.6

Python version: 3.6

Operating system (windows, osx, ...): osx

Issue:

• the http server creates duplicate values in the CORS header Access-Control-Allow-Origin when used with socket.io as an input channel
• issue seems to be related to using sanic in combination with python-socketio, and is known: How to resolve multiple CORS values in socketio requests, Sanic? miguelgrinberg/python-socketio#205
• reported here: https://forum.rasa.com/t/cors-multiple-values-in-response-header/12749
• possible solution described here: How to resolve multiple CORS values in socketio requests, Sanic? miguelgrinberg/python-socketio#205 (comment)

Error (including full traceback):

Access to XMLHttpRequest from origin has been blocked by CORS policy: The ‘Access-Control-Allow-Origin’ header contains multiple values, but only one is allowed.

[wochinge]

@akelad

[akelad]

@wochinge it's fixed with the PR now right?

[wochinge]

Yes!

[tmbo]

I will close this as it should be fixed now.