I am trying to create simple login application.I have created one login page and one servlet but it is giving the ServletException
here is my sample code.
public class Hello extends HttpServlet{
#Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,IOException{
try{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String username=request.getParameter("username");
String password=request.getParameter("password");
out.println("hello");
if(username.equals("xyz")&&password.equals("password"))
{
HttpSession session=request.getSession();
session.setAttribute("uname",username);
RequestDispatcher rd=request.getRequestDispatcher("/Home.jsp");
rd.forward(request, response);
}
else
{
RequestDispatcher rd=request.getRequestDispatcher("/login.html");
out.println("<h4>Plz provide correct Username or password</h4>");
rd.include(request,response);
}
out.close();
}catch(Exception e){System.out.println(e);}
}
this code is giving the following Exception:
I am not getting why this.
javax.servlet.ServletException: Class com.mq.sample.Hello is not a Servlet
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
java.lang.Thread.run(Unknown Source)
root cause
java.lang.ClassCastException: com.mq.sample.Hello cannot be cast to javax.servlet.Servlet
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
java.lang.Thread.run(Unknown Source)
Thanks in advance
You are getting error from Tomcat, refer to this link. So the thing is that you have servlet jar conflict in your classpath.
Remove javax.servlet-api.jar from classpath and do this.
Related
I have some code for download file from web server.
Everything works alright, but in console I have this exception:
июн 26, 2015 2:08:42 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [default] in context with path [/TestTask] threw exception
java.lang.IllegalStateException: Cannot call sendError() after the response has been committed
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:462)
at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.handleErrorInDevMode(DefaultDispatcherErrorHandler.java:109)
at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.handleError(DefaultDispatcherErrorHandler.java:57)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:909)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:576)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Why and what it can be? And how i can fix this problem? I try find answer in the google, but I failed.
The code:
package actions;
import java.io.IOException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.Action;
import org.apache.log4j.Logger;
import org.apache.struts.chain.contexts.ServletActionContext;
import service.CsvCreator;
import com.opensymphony.xwork2.ActionSupport;
public class DownloadCsvAction extends ActionSupport {
private static final long serialVersionUID = -4714537109287679996L;
private CsvCreator CSVcreator;
private static final Logger logger = Logger.getLogger(DownloadCsvAction.class);
public CsvCreator getCSVcreator() {
return CSVcreator;
}
public void setCSVcreator(CsvCreator cSVcreator) {
CSVcreator = cSVcreator;
}
#Override
public String execute() {
HttpServletResponse response = org.apache.struts2.ServletActionContext.getResponse();
response.setHeader("Content-Disposition", "attachment; filename=\"phone_records.csv\"");
response.setContentType("text/csv");
ServletOutputStream out;
try {
out = response.getOutputStream();
String tableHeader = "Caller, Event, Reciever, Timestamp\n";
out.write(tableHeader.getBytes("UTF-8"));
out.write(CSVcreator.getAllRecordsInString().getBytes("UTF-8"));
out.flush();
out.close();
} catch (IOException e) {
logger.error(e.getMessage());
}
return SUCCESS;
}
}
And my struts.xml:
<action name="DownloadCsvAction" class="DownloadCsvAction">
<result name="success" type="dispatcher"/>
</action>
Why and what it can be?
Because response is already committed. You have closed response before it's used by the Struts2.
And how I can fix this problem?
When your action execution ends, return Action.NONE result code. This code tells the invoker to not execute any result because response might be already committed.
You can also rewrite the action implementation to use stream result type. In this way you have not to do with the response and let Struts2 do the rest. Example of using stream result is here.
I have a problem with modifying servlet response in my filter. Here is the part of
my code:
public class MyFilter implements Filter {
#Override
public void destroy() {
}
#Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
System.out.println("BEFORE filter");
PrintWriter out = response.getWriter();
CharResponseWrapper responseWrapper = new CharResponseWrapper((HttpServletResponse) response);
chain.doFilter(request, responseWrapper);
String servletResponse = new String(responseWrapper.toString());
out.write(servletResponse);
out.close();
System.out.println("Response: " + servletResponse);
}
#Override
public void init(FilterConfig config) throws ServletException {
}
}
This code works fine when servlet returns html-page, but if servlet tries to return xml I get an exception:
SEVERE: Servlet.service() for servlet ViewerServlet threw exception
java.lang.IllegalStateException: getWriter() has already been called for this response
at org.apache.catalina.connector.Response.getOutputStream(Response.java:579)
at org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:183)
at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:102)
at org.apache.axis.transport.http.AxisServlet.sendResponse(AxisServlet.java:902)
at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:777)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(BirtSoapMessageDispatcherServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.epam.bi.filter.RptGenerationTimeCalcFilter.doFilter(RptGenerationTimeCalcFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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:128)
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:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)
Does anyone face such problem? Any ideas how to make it work?
Thanks in advance.
I am trying to get simple user Details (Name,Phone No, Gender(Option Box)) in an Applet and display the details in an JSP.I put all the three details in an HashMap and send it in a output Stream. The Applet Code is as Follows.
try
{
userUrl = "http://localhost:8080/AppletTest/display.jsp";
/* In the web.xml file I have mapped display.jsp to the Servlet */
testServlet = new URL(userUrl.toString());
servletConnection = testServlet.openConnection();
servletConnection.setDoOutput(true);
servletConnection.setRequestProperty("Content-Type","application/octet-stream");
ObjectOutputStream oos1 = new ObjectOutputStream(servletConnection.getOutputStream());
/* DataMap is the HashMap Containing values */
oos1.writeObject(dataMap);
oos1.flush();
oos1.close();
// Thread.currentThread().sleep(5000);
}
catch(Exception ie)
{
ie.printStackTrace();
}
// Finally call servlet by going to that page.
getAppletContext().showDocument(userUrl, "_self");
While on a servlet i just get the HashMap and forward it to a jsp page to display.
try
{
System.out.println("In Servlet");
ObjectInputStream inputFromApplet = new ObjectInputStream(request.getInputStream());
HashMap<String,String> receievedData = (HashMap<String,String>) inputFromApplet.readObject();
request.setAttribute("dataMap",receievedData);
request.getRequestDispatcher("display1.jsp").forward(request, response);
inputFromApplet.close();
}
catch (ClassNotFoundException e)
{
e.printStackTrace();
}
As asked in the comments in The Question here ,The Sysout("In Servlet") is printed. But an Exception is thrown
In Servlet
SEVERE: Servlet.service() for servlet jsp threw exception java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream. java:2749)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
at org.apache.jsp.display1_jsp._jspService(display1_jsp.java:71)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:852)
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(Thread.java:662)
What am I doing wrong. Please Help.
If I understand correctly you are :
sending a request to the servlet
reading from e input stream of that call
sending a jsp as the response to THAT call
redirecting the user from the applet to that same servlet
this causes a SECOND request, without anything serialized in it
the servlet fails on this second request
This unfortunately canno work. You should use two servlets (or the same one with an optional parameter) to handle the two requests, one will read from the input stream, and write to the session, while the second will retrive from the session and display in a jsp.
I suspect an exception is being thrown by the applet and you haven't detected it in the Java Console yet.
I am having problems connecting to gtalk/facebook server from behind a proxy .In my loginservlet under doPost I specify the proxy settings before making a connection with the servers.The code is as follows:
package web;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.proxy.ProxyInfo;
import dao.MySASLDigestMD5Mechanism;
public class LoginFacebookServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public LoginFacebookServlet() {
super();
}
XMPPConnection connection;
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String userName = request.getParameter("usrnm_fb");
String password = request.getParameter("password_fb");
response.setContentType("text/html");
PrintWriter pw=response.getWriter();
SASLAuthentication.registerSASLMechanism("DIGEST-MD5", MySASLDigestMD5Mechanism.class);
//SASLAuthentication.supportSASLMechanism("DIGEST-MD5", 0);
ProxyInfo proxyInfo = new ProxyInfo(ProxyInfo.ProxyType.HTTP,"proxy.xxx.com" "talk.google.com", port, "username", "password");
ConnectionConfiguration config = new ConnectionConfiguration("chat.facebook.com",5222,proxyInfo);
connection = new XMPPConnection(config);
config.setSASLAuthenticationEnabled(true);
try {
connection.connect();
} catch (XMPPException e) {
e.printStackTrace();
}
try {
connection.login(userName, password);
} catch (XMPPException e) {
e.printStackTrace();
}
System.out.println(connection.isAuthenticated());
// System.out.println("Welcome!!you are now connected to facebook");
}
}
When I run the application it still gives me 500 status error.Following is the stack trace
XMPPError connecting to chat.facebook.com:5222.: remote-server-error(502) XMPPError connecting to chat.facebook.com:5222.
-- caused by: java.net.ConnectException: Connection timed out: connect
at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:900)
at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1415)
at web.LoginFacebookServlet.doPost(LoginFacebookServlet.java:52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:852)
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(Thread.java:619)
Nested Exception:
java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at org.jivesoftware.smack.proxy.DirectSocketFactory.createSocket(DirectSocketFactory.java:28)
at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:888)
at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1415)
at web.LoginFacebookServlet.doPost(LoginFacebookServlet.java:52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:852)
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(Thread.java:619)
Apr 26, 2011 11:32:24 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet LoginFacebookServlet threw exception
java.lang.IllegalStateException: Not connected to server.
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:382)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:349)
at web.LoginFacebookServlet.doPost(LoginFacebookServlet.java:57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:852)
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(Thread.java:619)
I checked to see if any thing more was there to add for by passing proxy but am unable to understand as to where am I going wrong?
Thanks:)
XMPP != HTTP so there's no reason to expect that an HTTP proxy will be used by an XMPP client. However, it seems like Smack has added HTTP proxy support (in addition to SOCKS4 and SOCKS5 proxy support they had earlier). The ConnectionConfiguration can accept a ProxyInfo parameter.
As far as I can tell from the JavaDocs, this is what you need to do:
ProxyInfo proxyInfo = new ProxyInfo(ProxyInfo.ProxyType.HTTP, "proxy.xxx.com", 8080, "username", "password")
ConnectionConfiguration config = new ConnectionConfiguration("facebook.com", 5222, proxyInfo);
XMPPConnection conn = new XMPPConnection(config);
conn.connect();
Also, for future questions, please note
Although your question is tagged 'Smack' you posted no Smack specific code. The lines showing use of the URLConnection are pointless since that's not where your connection is failing.
Your question title indicates Google Talk, however everything else refers to Facebook. This is confusing and unclear questions or code that is NOT what you're actually working with will most likely lead to frustration for you and other members. As far as possible, you should post an SSCCE.
I want to use auth application for my web application to skip the registration process for user . I am using http://code.google.com/p/socialauth/ java library for implementation of auth.I am facing following problem
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.
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 .
Here is the piece of code executing .
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");
}
}
Here at line number 23 it is thowing null pointer exception saying that provider is coming as null
ERROR MSG::
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)
AuthProvider provider = AuthProviderFactory.getInstance(id); is throwing a NPE, because a property-file should be loaded, which does not exist:
java.util.Properties.load(Unknown Source)
But I don't know, which one is missing. I am sure you have to include some kind of property-file.
edit
http://code.google.com/p/socialauth/wiki/StrutsSample
In this sample-project you ca see a file called oauth_consumer.properties
May be that property-file is missing?