Apollo Kotlin 4 - Receiving 403 Error Instead of GraphQL Error Response on Incorrect Login

[Anolcera]

Question

I'm working on a Compose Multiplatform project using Apollo Kotlin 4 for GraphQL communication. When I attempt to log in with incorrect credentials, the server sends a JSON response containing a GraphQL error:

{ "errors": [ { "extensions": { "reason": "Incorrect username or password.", "show_resend": false } } ] }

However, my Apollo client is throwing an ApolloNetworkException with the message "Http request failed with status code 403" and doesn't provide access to the actual GraphQL error details.

Interestingly, when I test the same mutation in Postman, it correctly displays the GraphQL error response.

My question is:

What could be causing this discrepancy between the Apollo client and Postman? Is there a configuration issue on the client or server side? How can I properly catch and handle this GraphQL error response in my Apollo Kotlin code so I can display the "Incorrect username or password" message to the user?

[martinbonnin]

Hi 👋 It's a long story but any non-200 response isn't parsed as a GraphQL response. This is something the GraphQL over HTTP effort aims to fix.
If your server is using the new application/graphql-response+json content-type, we can fix that in Apollo Kotlin, this is something that I've been wanting to do for a while now. If not, you'll have to go through some extra hoops of using exposeHttpErrorBody (see this stack overflow answer).

[Anolcera]

Yes the server is using that so I'm just waiting for your PR to be merged. Thank you a LOT