Authentication issues with Cloud Endpoints Portal

Question

I have Cloud Endpoints Framework implemented in my App Engine project, and I'd like to migrate from the deprecated API Explorer to the new Endpoints Portal, but I have an authentication issue.

I have one endpoint with authentication enabled with a Google ID token. But when the user clicks on 'Try This API' in the Endpoints Portal, he is not authenticated. This works with the old API Explorer.

I use the project described in this tutorial: https://cloud.google.com/endpoints/docs/frameworks/java/get-started-frameworks-java.

It has API Management has described in the documentation and I followed these steps to authenticate users

I've added the class below to the sample code to test an API with authentication:

package com.example.echo;

import com.google.api.server.spi.auth.common.User;
import com.google.api.server.spi.config.Api;
import com.google.api.server.spi.config.ApiMethod;
import com.google.api.server.spi.response.UnauthorizedException;

@Api(
        name = "authenticatedApi",
        title = "Authenticated API",
        version = "v1",
        description = "Use OAuth 2.0 to authenticate",
        scopes = {"https://www.googleapis.com/auth/userinfo.email"},
        clientIds = {"*"}
)
public class AuthenticatedApi {

    @ApiMethod(name = "sayHello")
    public Message sayHello(User user) throws UnauthorizedException {
        if (user == null) {
            throw new UnauthorizedException("Invalid credentials");
        }

        Message message = new Message();
        message.setMessage("Hello " + user.getEmail());
        return message;
    }
}

There is a documentation about how configuring the portal for authentication but nothing about OAuth 2.0

I generate and deploy the openapi.json file using the maven plugin and gcloud:

$ mvn endpoints-framework:openApiDocs
$ gcloud endpoints services deploy target/openapi-docs/openapi.json

What am I missing?

Answer 1

That's a current Feature Request for the Google Cloud Endpoints team:

https://issuetracker.google.com/issues/127623471