I am building a GWT-GAE-Java application that imports Google Contacts using the GData Java Client library. I am following this example here: http://code.google.com/apis/gdata/docs/auth/oauth.html
I am attempting the first stage of this demo where I create a URL the user gets redirected to to authenticate my application to extract contact data. The problem is I can't get it to work. My code is running on the server section of the GWT application, and it fails on the first line where the GoogleOAuthParameters is initialized with a "NoClassDefFoundError". I have tried changing this every which way and I am pulling my proverbial hair out. I recognize that there is a GWT-Client library for managing this process from the client side of GWT, but I don't want to use that as it doesn't use oAuth. Any ideas? Cheers Gene **** CODE GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters(); oauthParameters.setOAuthConsumerKey(CONSUMER_KEY); oauthParameters.setOAuthConsumerSecret(CONSUMER_SECRET); oauthParameters.setScope("https://docs.google.com/feeds/"); oauthParameters.setOAuthCallback("http://www.example.com/ UpgradeToken.jsp"); GoogleOAuthHelper oauthHelper = new GoogleOAuthHelper(new OAuthHmacSha1Signer()); oauthHelper.getUnauthorizedRequestToken(oauthParameters); String approvalPageUrl = oauthHelper.createUserAuthorizationUrl(oauthParameters); System.out.println(approvalPageUrl); *****ERROR Jun 8, 2010 2:56:52 PM com.google.appengine.tools.development.ApiProxyLocalImpl log SEVERE: [1276034212868000] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.sohoappspot.scheduler.shared.UserInfo com.sohoappspot.scheduler.client.rpc.GreetingService.getUserInformation() throws java.lang.IllegalArgumentException' threw an unexpected exception: java.lang.NoClassDefFoundError: com/google/gdata/client/ authn/oauth/GoogleOAuthParameters at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java: 378) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: 581) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java: 188) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java: 224) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java: 62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 511) at org.mortbay.jetty.servlet.ServletHandler $CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java: 51) 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 com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java: 122) 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.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java: 70) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: 152) at com.google.appengine.tools.development.JettyContainerService $ApiProxyHandler.handle(JettyContainerService.java:349) 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.content(HttpConnection.java:938) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java: 409) at org.mortbay.thread.QueuedThreadPool $PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.NoClassDefFoundError: com/google/gdata/client/ authn/oauth/GoogleOAuthParameters at com.sohoappspot.scheduler.server.GreetingServiceImpl.getContactsAuthSubLogin(GreetingServiceImpl.java: 96) at com.sohoappspot.scheduler.server.GreetingServiceImpl.getUserInformation(GreetingServiceImpl.java: 78) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 43) at java.lang.reflect.Method.invoke(Method.java:616) at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java: 100) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: 562) ... 30 more -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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