I need to store the username/password entered by the user in order to use
them later to connect to an external system, so I tried changing login.jsp
to post to a jsp file rather than j_security_check.
The jsp then stores the username/password and tries to call j_security_check
as follows:
<%! String userName, password; %>
<%
userName = request.getParameter("j_username");
password = request.getParameter("j_password");
%>
<%-- store login information in javax.servlet.http.HttpSession --%>
<%
session.setAttribute("login_username", userName);
session.setAttribute("login_password", password);
%>
<%-- execute security check --%>
<jsp:forward page="j_security_check">
<jsp:param name="j_username" value="<%= userName %>"/>
<jsp:param name="j_password" value="<%= password %>"/>
</jsp:forward>
However, this gives the exception below (in tomcat 4m4) and creates an empty
file called j_security_check in the login directory.
If I change the jsp:forward to another jsp it works and the jsp gets all the
parameters/attributes and header info.
Is this a bug or is there any other way to call j_security_check manually?
Or at least replicate the work of authenticating the username/password and
storing that as the principal.
Thanks,
Barry.
A Servlet Exception Has Occurred
Exception Report:
javax.servlet.ServletException: Servlet.service() for servlet default threw
exception
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:537)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:431)
at
login._0002flogin_0002fsecurity_0005fcheck_0002ejspsecurity_0005fcheck_jsp_32._jspService(_0002flogin_0002fsecurity_0005fcheck_0002ejspsecurity_0005fcheck_jsp_32.java:102)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:181)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:317)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:396)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:180)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:255)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:165)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:443)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:242)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:1876)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:343)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:785)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:902)
at java.lang.Thread.run(Thread.java:484)
Root Cause:
java.lang.NullPointerException
at
org.apache.catalina.resources.FileResources.setResource(FileResources.java:586)
at
org.apache.catalina.servlets.DefaultServlet.doPut(DefaultServlet.java:401)
at
org.apache.catalina.servlets.DefaultServlet.doPost(DefaultServlet.java:365)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:517)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:431)
at
login._0002flogin_0002fsecurity_0005fcheck_0002ejspsecurity_0005fcheck_jsp_32._jspService(_0002flogin_0002fsecurity_0005fcheck_0002ejspsecurity_0005fcheck_jsp_32.java:102)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:181)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:317)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:396)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:180)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:255)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:165)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:443)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:242)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:1876)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:343)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:785)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:902)
at java.lang.Thread.run(Thread.java:484)
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