Question

Configuring CORS on App platform - Express

Hey All,

I have a pretty simple Express app running at https://hammerhead-app-ruqkl.ondigitalocean.app/. I have used the DigitalOcean settings for the app to configure a CORS policy as follows:

.* using Regex

ACCESS-CONTROL-ALLOW-METHODS GET, POST, CONNECT

ACCESS-CONTROL-ALLOW-HEADERS None

ACCESS-CONTROL-EXPOSE-HEADERS None

ACCESS-CONTROL-MAX-AGE None

ACCESS-CONTROL-ALLOW-CREDENTIALS Disabled

I am getting CORS errors when a page at say https://mydomain.com tries to make an Ajax request(GET) to https://hammerhead-app-ruqkl.ondigitalocean.app/. Looking in the developer console I do not see any access-control-allow-origin header being sent.

Any help and guidance will be appreciated.

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Bobby Iliev
Site Moderator
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• October 17, 2022

Hi there,

I believe that in order to use a custom domain name, you need to first follow the steps here on how to add your domain to your app:

https://docs.digitalocean.com/products/app-platform/how-to/manage-domains/

Then after that you could follow the steps here on how to configure your CORS:

https://docs.digitalocean.com/products/app-platform/how-to/configure-cors-policies/

Also, make sure to add content-type header in Access-Control-Allow-Headers.

Best,

Bobby

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