How to authenticate programmatically to google app engine (with Java)?

Question

I'm trying to authenticate to google app engine programmatically. I've tried the code sample from the "gae-app-manager" project but it fails:

tmp>java -jar net.sf.gae-app-manager-0.0.1-jar-with-dependencies.jar myaccount@gmail.com mypassword appname
Exception in thread "main" java.lang.Exception: Did not find ACSID cookie
        at net.sf.gaeappmanager.google.LogonHelper.loginToGoogleAppEngine(LogonHelper.java:85)
        at net.sf.gaeappmanager.google.appengine.Manager.retrieveAppQuotaDetails(Manager.java:34)
        at net.sf.gaeappmanager.google.appengine.Main.main(Main.java:55)

Any idea? I'm able to get the token, but there are no cookies. The code (taken from the gae-app-manager project - http://gae-app-manager.git.sourceforge.net/git/gitweb.cgi?p=gae-app-manager/gae-app-manager;a=blob;f=src/main/java/net/sf/gaeappmanager/google/LogonHelper.java;h=8e09a6d7f864c29b10847ac7fd2eeab2d3e561e6;hb=HEAD):

 List<NameValuePair> nvps = new ArrayList<NameValuePair>();
 nvps.add(new BasicNameValuePair("accountType", "HOSTED_OR_GOOGLE"));
 nvps.add(new BasicNameValuePair("Email", userid));
 nvps.add(new BasicNameValuePair("Passwd", password));
 nvps.add(new BasicNameValuePair("service", "ah"));
 nvps.add(new BasicNameValuePair("source", source));

 HttpPost post = new HttpPost(
                 "https://www.google.com/accounts/ClientLogin");
 post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

 HttpResponse response = client.execute(post);

 if (response.getStatusLine().getStatusCode() != 200) {
         throw new Exception("Error obtaining ACSID");
 }

 String authToken = getAuthToken(response.getEntity().getContent());

 post.abort();

 HttpGet get = new HttpGet(
                 "https://appengine.google.com/_ah/login?auth=" + authToken);

 response = client.execute(get);

 for (Cookie cookie : client.getCookieStore().getCookies()) {
         if (cookie.getName().startsWith("ACSID")) {
                 return cookie.getValue();
         }
 }

 get.abort();

 throw new Exception("Did not find ACSID cookie");

Thanks,

Li

Can you please help me here http://stackoverflow.com/questions/23306993/google-apps-customized-google-login-page-in-appspot — Kartik Domadiya, Apr 28 '14 at 15:25

score 1 · Answer 1 · answered Jun 16 '11 at 04:11

1

Have you considered using the OAuth support instead of trying to log in as a web client would? Every App Engine app can act as an OAuth provider with very little work required on the server side to set it up.

answered Jun 16 '11 at 04:11

Nick Johnson

100,655
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I'll try OAuth as well - will it allow me to access any https site that I'm permitted to (like with the HttpClient), or is it limited to specific areas in GAE? thanks. – Lin Jun 16 '11 at 10:21
@Li I'm not sure I understand. You're trying to authenticate a client to App Engine, aren't you? What do other sites have to do with it? – Nick Johnson Jun 17 '11 at 00:28
I was wondering if I could use the same method to connect to gmail and other google subdomains. – Lin Jun 19 '11 at 18:35
@Li Only to services that support OAuth for their APIs. – Nick Johnson Jun 20 '11 at 00:42

score 0 · Accepted Answer · answered Jun 19 '11 at 18:35

0

To solve the problem use "SACSID" instead of "ACSID"

answered Jun 19 '11 at 18:35

Lin

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1

Can you please elaborate? – latestVersion Dec 20 '13 at 03:46

How to authenticate programmatically to google app engine (with Java)?

2 Answers2