Docker,nginx, daphne and django-plotly-dash channels issue

[vats-vaibhav]

I am trying to run a django application with django plotly dash to update charts real time based on an event. I am using docker and nginx to deploy this on a cloud platform. But i am getting the below error

Error: nginx_1 | 172.20.0.1 - - [01/Feb/2021:11:48:05 +0000] "GET /ws/channel/ HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36" "-" nginx_1 | 172.20.0.1 - - [01/Feb/2021:11:48:10 +0000] "GET /ws/channel/ HTTP/1.1" 400 5 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36" "-"

Django plotly dash documentation says we can use Nginx-->daphne -> django-plotly-dash but i am not able to find any examples or support on this.

Can you please help me with any working demo examples or configuration on this please??

[GibbsConsulting]

If it is only the websocket connection that is failing, the first place to look would be the proxy settings in your nginx.conf - are you using a configuration that can handle websockets? Also, is it correct to assume that other parts of the application (ie dpd apps without websockets) are working correctly?