Google Cloud Endpoints + Firebase Auth: method_info is not set

Question

So I am running the sample code provided by Google:

package com.neat.backend;
/**
 * An endpoint class we are exposing
 */
@Api(
        name = \"myApi\",
           


        

Answer 1

I got the same error message, and eventually tracked it down to making a request with a trailing / in the URL where my API did not specify one. The trailing slash only causes an error for calls that provide an authorization token.

Apparently ControlFilter (and therefore also GoogleAppEngineControlFilter) did not recognize it as a valid endpoint and therefore did not bother attaching method_info to the request. But then EndpointsServlet thought it was valid and tried to authenticate without all the needed info!

The fix was easy: remove the trailing slash from the URL in my request. Tracking down the problem, however, was not! I see this was not your problem, but maybe this answer will help someone else.