Authenticate my “app” to Google Cloud Endpoints not a “user”

Question

What I\'m trying to do is to authenticate my Android app to the Google Cloud Endpoint. Basically the endpoints should only allow my Android app to access the methods and not

Answer 1

You need to call authenticate on the client, then possibly the library you're using will 'inject' the user information.

Answer 2

It sounds like it's working as intended. You control which client apps can call your endpoint methods via the client IDs as you have already done. The User parameter is coming in as null precisely because you aren't doing end-user authentication. The User parameter represents an actual real user (Google Account). So if you don't need end-user authenticated methods, you can just simply not define the User parameter, or else ignore the null value. You said your problem is that the User parameter is set null. What are you expecting it to be in this scenario?

Answer 3

Here's what worked for me :

Let's say you have the keys below :

static final String WEB_CLIENT_ID = "somekeyfor webclientid.apps.googleusercontent.com";

static final String ANDROID_CLIENT_ID = "somekeyfor androidclientid.apps.googleusercontent.com"; static final String ANDROID_AUDIENCE = WEB_CLIENT_ID;

Your Api anotation should look like this :

@Api(
        name = "yourapiname",
        clientIds = {CloudEndpoint.WEB_CLIENT_ID,CloudEndpoint.ANDROID_CLIENT_ID},
        audiences = {CloudEndpoint.ANDROID_AUDIENCE},
        version = "v1",
        namespace = @ApiNamespace(
                ownerDomain = "myapp.app.com",
                ownerName = "myapp.app.com",
                packagePath = ""
        )
)

In the annotation below, notice how your audience is the variable --> ANDROID_AUDIENCE which is equal to WEB_CLIENT_ID.

Now in your app side, when you create the googleAccountCredential object, you should pass in the Web Client Id like this :

mAccountCredentials = GoogleAccountCredential.usingAudience(getApplicationContext(),"server:client_id:" + "yourwebclientID");

Note that even if this is properly done, your user object in the endpoint might still coming out as Null if the account name you pass in mAccountCredentials.setSelectedAccountName("accontname") does not exist in the device. Therefore make sure the account name you pass does exist in the Android device by going to --> (Settings/Accounts)