Hi, I need to add a JWT header to my GraphQL subscription - does anyone know how to do this with apo...

# apollo-kotlin

[james]

Hi,
I need to add a JWT header to my GraphQL subscription - does anyone know how to do this with apollo-android? (and somehow support refreshing jwts as well)

[mbonnin]

You can use ApolloClient.subscriptionConnectionParams() to send additional information in the init message

[mbonnin]

Or if you need more control over it, you'll most likely have to implement your own OperationMessageSerializer

[james]

Thanks for getting back to me

[james]

My subscription fails with java.io.EOFException and no other details in

@Override
    public void onNetworkError(@NotNull Throwable t) {
      Callback<T> callback = this.originalCallback;
      if (callback != null) {
        callback.onFailure(new ApolloNetworkException("Subscription failed", t));
      }
      terminate();
    }

After a couple of minutes. Any idea what could cause this?

[mbonnin]

Right, I've seen this as well. Not 100% sure what's the root cause. Most probably your backend requires a ping of some sort.

[rocketraman]

The ApolloRequestInterceptor does not work with subscriptions @mbonnin?

[mbonnin]

@rocketraman it should : https://github.com/apollographql/apollo-android/blob/main/apollo-runtime-kotlin/sr[…]Main/kotlin/com/apollographql/apollo/internal/RealApolloCall.kt

[rocketraman]

That sounds like a better approach then... use a standard interceptor like the built-in bearer token interceptor or a custom variation, and it should work for both regular calls and subscriptions.

[james]

Yeah the EOF was indeed a backend required ping. I was having issues using the Apollo interceptor for JWT behavior, but will take another look. Thanks both.