Any inputs on this as i am strucked here On Nov 17, 11:21 pm, Travelling Rants <[email protected]> wrote: > Hi All, > > I am trying to access contacts using gdata client library.when i am > trying to access the contacts i am facing following exception > > java.lang.NullPointerException: No authentication header information > > com.google.gdata.util.AuthenticationException.initFromAuthHeader(AuthenticationException.java: > 96) > > com.google.gdata.util.AuthenticationException.<init>(AuthenticationException.java: > 67) > > com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java: > 600) > > com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java: > 563) > > com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java: > 552) > > com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java: > 530) > > com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java: > 535) > com.google.gdata.client.Service.getFeed(Service.java:1135) > com.google.gdata.client.Service.getFeed(Service.java:998) > com.google.gdata.client.GoogleService.getFeed(GoogleService.java:631) > com.google.gdata.client.Service.getFeed(Service.java:1017) > com.raisonne.oauth.CallBackAction.execute(CallBackAction.java:62) > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > Hers is the client code i have written to communicate with the service > > GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters(); > > oauthParameters.setOAuthConsumerKey("xyz"); > > oauthParameters.setOAuthConsumerSecret("secret"); > GoogleOAuthHelper oauthHelper = new > GoogleOAuthHelper(new > OAuthHmacSha1Signer()); > oauthParameters.setScope(SCOPE); > oauthParameters.setOAuthVerifier(oauth_verifier); > oauthParameters.setOAuthToken(oauth_token); > > oauthParameters.setOAuthTokenSecret(session.get("oauth_token_secret").toString()); > String token = > oauthHelper.getAccessToken(oauthParameters); > ContactsService client=new ContactsService > ("mydemoapp"); > client.setOAuthCredentials(oauthParameters, new > OAuthHmacSha1Signer()); > URL feedUrl = new URL("http://www.google.com/m8/feeds/ > contacts/default/base"); > ContactFeed resultFeed = client.getFeed(feedUrl, > ContactFeed.class); > > for (int i = 0; i < resultFeed.getEntries().size(); > i++) { > ContactEntry entry = (ContactEntry) > resultFeed.getEntries().get(i); > System.out.println("|\t" + (i + 1) + ": " > + entry.getTitle().getPlainText()); > } > > i am getting this exception at this line > > ContactFeed resultFeed = client.getFeed(feedUrl, ContactFeed.class); > > can any one help me to find out what exactly i am doing wrong? > > thanks in advance
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