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POImplementing auth in web application
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  1. POImplementing auth in web application
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    copied!<p>I want to use auth application for my web application to skip the registration process for user . I am using <a href="http://code.google.com/p/socialauth/" rel="nofollow">http://code.google.com/p/socialauth/</a> java library for implementation of auth.I am facing following problem</p> <p>1.I have created the secret key with those auth provider like twitter. but i am having problem while running this app locally on my system as i give the address of my site required while generating the secret key.</p> <p>2.I am not able to configure my host file so that it take the properties my the address which i gave while generating the secret key .</p> <p>Here is the piece of code executing .</p> <pre><code>package com.auth.actions; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.util.RequestUtils; import org.brickred.socialauth.AuthProvider; import org.brickred.socialauth.AuthProviderFactory; import com.auth.form.AuthForm; public class SocialAuthenticationAction extends Action { final Log LOG = LogFactory.getLog(SocialAuthenticationAction.class); @Override public ActionForward execute(final ActionMapping mapping, final ActionForm form, final HttpServletRequest request, final HttpServletResponse response) throws Exception { AuthForm authForm = (AuthForm) form; String id = authForm.getId(); System.out.println("in authentieavtaonsdfsaf"); AuthProvider provider = AuthProviderFactory.getInstance(id); String returnToUrl = RequestUtils.absoluteURL(request,"/socialAuthSuccessAction.do").toString(); authForm.setProvider(provider); String url = provider.getLoginRedirectURL(returnToUrl); LOG.info("Redirecting to: " + url); if (url != null) { ActionForward fwd = new ActionForward("openAuthUrl", url, true); return fwd; } return mapping.findForward("failure"); } } </code></pre> <p>Here at line number 23 it is thowing null pointer exception saying that provider is coming as null</p> <p>ERROR MSG::</p> <blockquote> <p>Jan 23, 2011 12:26:23 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet action threw exception java.lang.NullPointerException at java.util.Properties$LineReader.readLine(Unknown Source) at java.util.Properties.load0(Unknown Source) at java.util.Properties.load(Unknown Source) at org.brickred.socialauth.AuthProviderFactory.getInstance(AuthProviderFactory.java:72) at com.auth.actions.SocialAuthenticationAction.execute(SocialAuthenticationAction.java:31) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Unknown Source)</p> </blockquote>
 

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