Chat not connecting after deploying to Azure #7574

2 Answer(s)

• 

  0

  maliming created 5 years ago

  Support Team

  Please share the error message of the browser console and the log information of the application backend.

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• 

  0

  vnetonline created 5 years ago

  If you are getting the following error in your console in developer tools after logging in

  Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Credentials' header in the response is '' which must be 'true' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

  Error: Failed to complete negotiation with the server: Error

  Error: Failed to start the connection: Error

  POST https://yourserver.azurewebsites.net/signalr-chat/negotiate?encauthtoken=wNYmO41... net::ERRFAILED

  Solution:

  Turn on Enable Access-Control-Allow-Credentials Turn WebSockets to on.

  Explanation:

  From the Azure Portal locate your App Service that is hosting your AspNetCore website

  1. Click CORS

  

  4. Check the Enable Access-Control-Allow-Credentials

  

  6. Click Save

  7. Now click on Configruation under the Stettings Sections in the menu

  

  8. Click on General Settings and turn on Websockets

  

  10. Now you should the chat should connect once logged in and no more errors in your console in developer tools.

  Be sure to empty Cache and Hard reload your browser

  

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