I am new to Google Drive API and recently have done two small projects using drive API. I am now implementing DrEdit and have followed instructions mentioned in - https://github.com/googledrive/dredit/blob/master/java/README.md After successful deployment in Eclipse, when the application launches, I see the consent screen and after accepting that, I am getting following error: Error: Server Error The server encountered an error and could not complete your request. Please try again in 30 seconds.
Here is the log trace of google app engine.
Uncaught exception from servlet
java.lang.RuntimeException: Can't handle the OAuth2 callback, make sure that code is valid.
at edu.csus.dredit.DrEditServlet.handleCallbackIfRequired(DrEditServlet.java:178)
at edu.csus.dredit.StartPageServlet.doGet(StartPageServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
at com.google.apphosting.runtime.jetty.ResourceFileServlet.serveWelcomeFileAsForward(ResourceFileServlet.java:342)
at com.google.apphosting.runtime.jetty.ResourceFileServlet.maybeServeWelcomeFile(ResourceFileServlet.java:281)
at com.google.apphosting.runtime.jetty.ResourceFileServlet.doGet(ResourceFileServlet.java:142)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:254)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:527)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:220)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:724)
I saw many posts here but no success. I am not sure, what went wrong. I read this document to enable Passwordless Login with OAuth2: https://cloud.google.com/appengine/docs/java/tools/uploadinganapp and here it goes -
C:\Program Files (x86)\eclipse luna 4.4\eclipse\plugins\com.google.appengine.ecl
ipse.sdkbundle_1.9.18\appengine-java-sdk-1.9.18\bin>appcfg --oauth2 update C:\Us
ers\Pilluda\git\dredit\war
Mar 07, 2015 5:39:19 PM com.google.appengine.repackaged.com.google.api.client.ex
tensions.java6.auth.oauth2.FileCredentialStore <init>
WARNING: unable to change file permissions for everybody: C:\Users\Pilluda\.appc
fg_oauth2_tokens_java
Please enter code: 4/5Wft2ANn7R7RiheUSOuCM_gQ_wsl6fiwRU6Ie7sICKQ.wvQzIOeFCgAdEnp
6UAPFm0F0jRXulwI
Reading application configuration data...
Mar 07, 2015 5:40:59 PM com.google.apphosting.utils.config.AppEngineWebXmlReader
readAppEngineWebXml
INFO: Successfully processed C:/Users/Pilluda/git/dredit/war\WEB-INF/appengine-w
eb.xml
Mar 07, 2015 5:40:59 PM com.google.apphosting.utils.config.AbstractConfigXmlRead
er readConfigXml
INFO: Successfully processed C:/Users/Pilluda/git/dredit/war\WEB-INF/web.xml
Beginning interaction for module default...
0% Created staging directory at: 'C:\Users\Pilluda\AppData\Local\Temp\appcfg2174
618651168391922.tmp'
5% Scanning for jsp files.
20% Scanning files on local disk.
25% Initiating update.
28% Cloning 2 static files.
31% Cloning 59 application files.
40% Uploading 0 files.
52% Initializing precompilation...
90% Deploying new version.
95% Closing update: new version is ready to start serving.
98% Uploading index definitions.
Update for module default completed successfully.
Success.
Cleaning up temporary files for module default...
If anybody know how to correct this problem, please let me know.
Created Project Facets through Eclipse and given permissions as a Web Project and build clean and deployed. Now I don't see this error. Good news is that, the authentication done by OAUTH2 is done successfully, tokens are sent and refreshed and data is visible.