Hi Julian, The example code given there might be dealing with the Drive API, but APIs in this context are quite abstract, and you can easily substitute any Google API.
Reading back over your question, I'm not sure you've supplied enough information for anybody to help answer. What exactly is doing the authenticating? Is your endpoint a Cloud Endpoints <https://cloud.google.com/appengine/docs/java/endpoints/> endpoint? It's not really clear to me what is doing the authentication at your "endpoint". Do you just mean that you've deployed with "login: admin"? At any rate, this forum, as mentioned, isn't meant for 1-on-1 technical support, so I don't think you should continue to follow-up in this thread, and should either improve the stackoverflow question to clarify exactly what you're expecting to happen in technical language and specifics, or else post a new question which does include that information. That will enable people to help you better. Best wishes, Nick On Saturday, August 8, 2015 at 1:51:24 PM UTC-4, Julian Bunn wrote: > > Hi Jason, > > Yes: > http://stackoverflow.com/questions/31816007/authentication-with-google-app-engine-service-using-googlecredential-with-a-serv > > The suggestion there involves the Google Drive API, which is not really > helping me, as my GAE application does not use that API. > > Julian > > On Saturday, August 8, 2015 at 9:38:00 AM UTC-7, Jason Collins wrote: >> >> Julian, can you post your link to your SO question? >> >> >> On Thursday, 6 August 2015 12:20:28 UTC-7, Julian Bunn wrote: >>> >>> Hi Nick, >>> >>> Many thanks - I had already posted on stackoverflow with no luck, so >>> came here :-) I do have one reply now over there, which suggests using >>> client secrets, so that is a good lead. Also your comments on the use of >>> service account are well taken - it looks like that may be inappropriate. >>> >>> Thanks for the pointers to the documentation, which I'd already visited >>> and read but ended up being confused - as is no doubt evident from my >>> question :-) >>> >>> Julian >>> >>> On Wednesday, August 5, 2015 at 4:57:26 PM UTC-7, Nick (Cloud Platform >>> Support) wrote: >>>> >>>> Hi Julian, >>>> >>>> You've produced an excellent post which would belong on >>>> stackoverflow.com. Google Groups isn't the place to post specific >>>> technical issues, as this forum is meant more for general discussion of >>>> the >>>> platform and services. >>>> >>>> I'll give you the advice before you post there that it seems you've >>>> combined examples from different kinds of OAuth flow and this might be the >>>> cause of your issues. I see that there's a variable "emailScope" - this is >>>> a scope which a user would actually grant to your application, not one >>>> which a service account could grant. >>>> >>>> The service account and its credentials are used to call APIs on behalf >>>> of your application, although I don't think I've seen this pattern before, >>>> where you want to call an endpoint on your own app using a service >>>> account. >>>> As far as I know, service accounts have only been used to authenticate >>>> with >>>> Google APIs, although I suppose it might be possible to write an endpoint >>>> which correctly authenticates it. >>>> >>>> You could do some more reading on OAuth2 >>>> <https://developers.google.com/identity/protocols/OAuth2>, OpenID >>>> Connect >>>> <https://developers.google.com/identity/protocols/OpenIDConnect?hl=en>, >>>> Service Accounts >>>> <https://developers.google.com/identity/protocols/OAuth2ServiceAccount>, >>>> and the Google Identity Platform >>>> <https://developers.google.com/identity/>, and try to repost your >>>> question to stackoverflow.com. That would be the best action as there >>>> are many more users there ready to help with a technical question. >>>> >>>> If you would like to open a thread in this forum discussing the >>>> platform or services in more broad terms, starting a discussion that would >>>> be useful for other users to join in to, feel free to do so. >>>> >>>> Have a great day! >>>> >>>> [1] http://www.stackoverflow.com/ >>>> [2] http://www.serverfault.com/ >>>> [3] http://code.google.com/p/google-appengine/issues/list >>>> >>>> On Wednesday, August 5, 2015 at 1:32:41 AM UTC-4, Julian Bunn wrote: >>>>> >>>>> I have a GAE application with an endpoint that requires >>>>> authentication, which I need to call from an application (rather than >>>>> from >>>>> in a browser). I was using ClientLogin, but that is now obsolete, so I >>>>> have >>>>> set up a Service Account in the Google Console, and stored its keypair >>>>> .p12 >>>>> file so that I can use the OAuth methods as described in the >>>>> documentation. >>>>> >>>>> Although the GoogleCredential builder successfully returns an >>>>> authorization token, if I then use that token in an HTTP get call to the >>>>> endpoint, the response is always the Google Login page. >>>>> >>>>> Why, if I use the token, does GAE not take my application call as >>>>> authorized? Am I doing this all wrong or missing a step? >>>>> >>>>> Here is the code: >>>>> >>>>> String emailAddress = "xxxx...@developer.gserviceaccount.com"; >>>>> JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance(); >>>>> String emailScope = "https://www.googleapis.com/auth/userinfo.email";; >>>>> String keyFileName = "YYYYY.p12"; >>>>> String baseURL = "http://ZZZZZ.appspot.com";; >>>>> HttpTransport httpTransport; >>>>> try { >>>>> httpTransport = GoogleNetHttpTransport.newTrustedTransport(); >>>>> >>>>> File keyFile = new File(keyFileName); >>>>> if(!keyFile.exists()) { >>>>> System.err.println("Key file "+keyFileName+" missing"); >>>>> System.exit(0); >>>>> } >>>>> >>>>> GoogleCredential credential = new GoogleCredential.Builder() >>>>> .setTransport(httpTransport) >>>>> .setJsonFactory(JSON_FACTORY) >>>>> .setServiceAccountId(emailAddress) >>>>> .setServiceAccountScopes(Collections.singleton(emailScope)) >>>>> .setServiceAccountPrivateKeyFromP12File(keyFile) >>>>> .build(); >>>>> >>>>> boolean success = credential.refreshToken(); >>>>> System.out.println("Access token refresh "+ success); >>>>> >>>>> String token = credential.getAccessToken(); >>>>> >>>>> System.out.println("Token "+token); >>>>> >>>>> String uri = "http://ZZZZZ.appspot.com/gcm/home";; >>>>> >>>>> System.out.println("uri: " + uri); >>>>> >>>>> HttpGet get = new HttpGet(uri); >>>>> get.setHeader("Cookie", token); >>>>> >>>>> HttpClient client = new DefaultHttpClient(); >>>>> HttpResponse response = client.execute(get); >>>>> response.getEntity().writeTo(System.out); >>>>> >>>>> Typical output: >>>>> >>>>> Access token refresh true >>>>> Token ya29.xQGG1kxxxxxxxxxxxxxxxxxxx >>>>> uri: http://ZZZZZ.appspot.com/gcm/home >>>>> >>>>> <!DOCTYPE html> >>>>> <html lang="en"> >>>>> <head> >>>>> <meta charset="utf-8"> >>>>> <meta content="width=300, initial-scale=1" name="viewport"> >>>>> <meta name="google-site-verification" >>>>> content="LrdTUW9psUAMbh4Ia074-BPEVmcpBxF6Gwf0MSgQXZs"> >>>>> <title>Sign in - Google Accounts</title> >>>>> ..... >>>>> >>>>> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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