Rails 5 WebSockets “Request origin not allowed” [Solution]

Since I have spent about 15 minutes today trying to figure out why my WebSockets are not updating in development, I have decided to put quick fix here, hopefully this will be useful.

Issue:

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When I started ActionCable I got this error:

Request origin not allowed: http://0.0.0.0:3000
Failed to upgrade to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
Finished "/cable/" [WebSocket] for 127.0.0.1 at 2016-08-01 14:23:38 -0700

Request origin not allowed: http://0.0.0.0:3000

Failed to upgrade to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)

Finished "/cable/" [WebSocket] for 127.0.0.1 at 2016-08-01 14:23:38 -0700

Solution:

Go to

Ruby

development.rb

1

development.rb
Add following line:

Ruby

config.action_cable.allowed_request_origins = ['http://0.0.0.0:3000']

1

config.action_cable.allowed_request_origins = ['http://0.0.0.0:3000']
Restart Web Server
Enjoy!

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Cheers,

Anatoly

Discussion

Rails 5 Actioncable Real-Time Notifications – Part 3 Stream Notifications - My Programming Blog

August 22, 2016

[…] have create separate post how to resolve it ,but for your convenience, I will repeat it […]

Bruno Wego

January 13, 2017

Thank you very much, exactly what I needed.

Michal

June 19, 2017

Great Job. You just saved my time