I'm writing an app which needs to post emails on behalf of users of our Google Apps Premier domain. I see there is a way to do this using the AppEngine Mail Service if you have the admin credentials. I want to know how to do this from a normal Java app running on say Tomcat.
I haven't done this, but if you have a Premier Apps domain then you should be able to enable and use oauth (you cannot with the free version) and follow these examples to send email on behalf of the users in your domain: http://code.google.com/apis/gmail/oauth/code.html if I understand your question correctly.
App Engine is a platform. You can't use App Engine services without writing an app that runs on App Engine.
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I'm new to web dev, and trying to build an application using google app engine's java standard environment, which will require user authentication. I'd like to provide authentication which requires only a username and password of the user, as opposed to a phone number or social account.
As I look through the options listed in app engine's auth tutorial, if I'm understanding them correctly, none of them allow login without a phone number or social account? https://cloud.google.com/appengine/docs/standard/java/oauth/
If so, are there alternatives available while still using app engine? I've read some about 'web container managed authentication' but I'm not sure if its something app engine will support, or if its a full solution.
Is it possible/feasible to roll fully custom authentication in the app engine standard environment? As I search for custom authentication tutorials I see a lot of articles recommending against this, but it's not clear to me what the alternative is.
Thanks for any information
As it's mention on the OpenID Connect documents of Google Cloud, it's important for you and your users security to authenticate using well proven and debugged code. Google offers Firebase Authentication which let's users log in with an Email and password.
If you still want to implement the authorize part on your own, you can use your preferred web framework and probably it will have an authorizing process.
For example, in python you can use Django authorize system to provide users for a custom way to log in.
But, as I said before, I highly recommend you to use the Google APIs for authorizing as they are OpenID certificated.
I am really fed up. All I see the Google App Engine tutorial was just making the example on how to authenticate without password. What if I want to authenticate directly from my gmail account, how can I do it???
User the google provided users service which can use your google account for auth.
https://developers.google.com/appengine/docs/python/gettingstarted/usingusers
Google App Engine provides several useful services based on Google infrastructure, accessible by applications using libraries included with the SDK. One such service is the Users service, which lets your application integrate with Google user accounts. With the Users service, your users can use the Google accounts they already have to sign in to your application.
I want to implement some form of access control for a REST API implemented in App engine. Is it possible to get the list of GAE Applications that a user has permissions to administer or view in the app engine console. Or whether the user has permissions to administer/view the current application.
Note: the Users API does not work for me because this is a rest server called by another google app not a web service called by a user from the browser. OAuth API seems promising but I was unable to find an OAuth scope or rest endpoint for getting GAE related information.
there is no API that can provide a "list of GAE Applications that a user has permissions to administer." Google Cloud Endpoints on App Engine (Trusted Tester program) may be useful for hosting custom RESTful APIs with user authorization may be useful, read more here: http://endpoints-trusted-tester.appspot.com/
There must be an API as the Google Eclipse plugin is using it.
https://developers.google.com/eclipse/docs/signin?hl=de
But it is not documented.
So now Google released the multi-tenant feature for gae.
Assuming i am going to implement a google app engine application and put it on google apps market place.
suppose www.doma.com and www.domb.com bought the application.
can usera from doma and userb from domb authenticate to this application with their google apps domain username (in other words) can usera#doma and userb#domb use authenticate with gae?
Thanks in advance
Google does not limit users when they go through OpenID or Google Accounts authentication procedure, your code should do this. After user is authenticated control is handed back to your code - at this point you should check users data and decide to pass the request through or not.
Also, if you want to use doma.com and domb.com as your domain names on GAE you need to own this domains and create separate Google Apps account for each of them. This means that random user cannot have user#doma.com email address (unless you manually created an account for them on Google Apps).
I have successfully followed the examples to gain an AuthSub token to authorize my GAE application to have access to the user's Google Calendar.
I have added the domain parameter to the method gdata.auth.generate_auth_sub_url so that the application is authenticated against a Google Apps Domain user. The app is then installed in one of our test domains.
This is working fine, however, each user in the domain has to go through the process of authorizing the app to use the calendar. In other Marketplace Apps that I have tried, this authorization is done once for the whole domain when the app is installed.
How is this achieved?
This page describes how Marketplace apps can access the gdata APIs on a user's behalf.