Hi Nick, Thanks for much for persisting with your help!
Yes. your understanding is correct: I'd like to use a service account to login so that I can make requests to an admin route of my app. Under "Credentials" in the new Google Developers Console, I see the Service Account listed in the OAuth section, with its ID, email address and certificate fingerprints. Under "Permissions" in the Console, I have my own account and a maintenance account listed as Owners. On the same page, under "Service Accounts" I have three listed, all having Edit permission. One of these is the same account listed in "Credentials". (The other two are @cloudservices and @developer.gservice accounts - I don't know where they came from, as I don't recall creating them). On the old version of the Developers Console, I can see that the Authentication Type is set to Google Accounts API. On there I can also see the Service Account Name but it is different from the Service Account listed under Credentials (above) - which is confusing me. The web xml for the deployment includes: <!-- Secure sensitive URLs --> <security-constraint> <web-resource-collection> <url-pattern>/gcm/home</url-pattern> <url-pattern>/gcm/send</url-pattern> </web-resource-collection> <auth-constraint> <role-name>admin</role-name> </auth-constraint> </security-constraint> These are the two endpoints I need to call from the client. Thanks again! Julian On Wednesday, August 12, 2015 at 1:28:20 PM UTC-7, Nick (Cloud Platform Support) wrote: > > Hi Julian, > > OAuth2 is a complex topic and has many methods of application, being just > an authentication/authorization protocol, and having many possible uses / > forms of appearance (client-server, server-server, 3-legged, etc.) > > From your comments, I can now understand you're using login: admin on a > route of your app, and you'd like to know how to make requests to a route > on your app protected in such a manner, using a service account to login. > Is that accurate? > > Could you let me know whether the service account is added as an admin of > your application in the Developers Console under "Credentials" and whether > your app's authentication method is set to "Google Accounts"? > > On Monday, August 10, 2015 at 8:10:35 PM UTC-4, Julian Bunn wrote: >> >> Hi Nick, >> >> Thanks ... >> >> GAE is doing the authentication. My GAE app has endpoints (i.e. urls like >> my.appspot.com/gcm/home) that can only be executed by an admin who is >> logged in. There is nothing special I have implemented to support this, I >> am just using Google's GAE infrastructure. >> >> So, in the past, all I needed to do from a client application was to call >> ClientLogin with a user/pass pair, which would return me a token which >> could then be sent as a Cookie in calls to the GAE endpoints. >> >> This worked very well! >> >> Now that ClientLogin has been disabled, I am looking for an alternative >> to it. I apparently need to use OAuth2, but there is no documentation that >> seems to match my use case, unhappily. Use cases seem to assume the use of >> various Google APIs, which I am not using. >> >> Thanks anyway. >> >> Julian >> >> >> >> On Mon, Aug 10, 2015 at 4:13 PM, Nick (Cloud Platform Support) < >> pay...@google.com <javascript:>> wrote: >> >>> 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 a topic in the >>> Google Groups "Google App Engine" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/google-appengine/rYKSUDTFWTI/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> google-appengi...@googlegroups.com <javascript:>. >>> To post to this group, send email to google-a...@googlegroups.com >>> <javascript:>. >>> Visit this group at http://groups.google.com/group/google-appengine. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/google-appengine/a1c82338-d11c-4192-b020-d7f3107e87f9%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/google-appengine/a1c82338-d11c-4192-b020-d7f3107e87f9%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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