subscription request is using /graphql/realtime instead of /graphql

[marcuscheung-carbonlinking]

Description

using amplify_api: 2.10.0
when we set the amplifyconfiguration.dart api.awsAPIPlugin..endpoint to https://custom-domain/graphql, we can't establish ws connection.

Error during WebSocket handshake: Unexpected response code: 403
ERROR | WebSocketBloc - ... | Shutting down with exception: NetworkException {
"message": "Exception from WebSocketService.",
"underlyingException": "WebSocketChannelException: WebSocketException: Failed to connect WebSocket"
}

Categories

• Analytics
• API (REST)
• API (GraphQL)
• Auth
• Authenticator
• DataStore
• Notifications (Push)
• Storage

Steps to Reproduce

1. change lib/amplifyconfiguration.dart api block.

    "api": {
        "plugins": {
            "awsAPIPlugin": {
                "<appsync name>": {
                    "endpointType": "GraphQL",
                    "endpoint": "https://<custom-doamin>/graphql",
                    "region": <region id>,
                    "authorizationType": "AMAZON_COGNITO_USER_POOLS"
                }
            }
        }
    }

2. start subscription

      const document = r'''
        subscription OnCreateTodo($owner: String!) {
          onCreateTodo(owner: $owner) {
            id owner title done createdAt updatedAt
          }
        }
      ''';
 final operation = Amplify.API.subscribe(
        request,
        onEstablished: () {
          developer.log('Subscription established', name: 'TodoListScreenController');
          state = state.copyWith(subscription_active: true);
        },
      );

Screenshots

No response

Platforms

• iOS
• Android
• Web
• macOS
• Windows
• Linux

Flutter Version

3.38.10

Amplify Flutter Version

2.10.0

Deployment Method

Amplify Gen 2

Schema

[marcuscheung-carbonlinking]

#3028
just notice custom domain will attach /realtime, but how to preform subscription?

[marcuscheung-carbonlinking]

updated cloudfron behaviors, but still get errors:
{"id":"04985219-e36c-4709-b915-7164bf3c7829","type":"connection_init"}
{"payload":{"errors":
[{"errorType":"com.amazon.coral.service.http#HttpNotFoundException","errorCode":400}]},"type":"connection_error"}

https://www.josephso.dev/aws-appsync-with-custom-domain-graphql-subscription-issue-and-workaround/

[cadivus]

Hi @marcuscheung-carbonlinking ,
thanks for the issue and the follow-up details! We are looking into it and come back to you when we know more.