HTTP Status 400 - Invalid direct reference to form login pag

[bugwang]

Hello! I work for Japanese company in Tokyo as Korean.
please Help me!

Can teach me anyone who knows this problem.

I want to login with Form throuth SSL.
Login Form of JSP is posted by the Controller Servlet(EmLogin).
When I try to login, this message is shown.

"The request sent by the client was syntactically incorrect "

What's the problem?
My Login JSP view has a form that use POST method.


thanks..

 <security-constraint>
 <web-resource-collection>
 <web-resource-name>Emfg</web-resource-name>
 <description>Emfg Standard</description>
 <url-pattern>/v400/APS*</url-pattern>
 <url-pattern>/v400/Code*</url-pattern>
 <url-pattern>/v400/MA_*</url-pattern>
 <url-pattern>/v400/PU_*</url-pattern>
 <url-pattern>/v400/MP_*</url-pattern>
 <url-pattern>/v400/*</url-pattern>
 <http-method>GET</http-method>
 <http-method>POST</http-method>
 </web-resource-collection>
 <auth-constraint>
 <role-name>emAll</role-name>
 <role-name>emAdmin</role-name>
 </auth-constraint>
 <user-data-constraint>
 <transport-guarantee>NONE</transport-guarantee>
 </user-data-constraint>
 </security-constraint>

 <security-constraint>
 <web-resource-collection>
 <web-resource-name>Login</web-resource-name>
 <description>Emfg Standard</description>
 <url-pattern>*.htm</url-pattern>
 <url-pattern>*.html</url-pattern>
 <url-pattern>*.jsp</url-pattern>
 <url-pattern>/EmLogin</url-pattern>
 <http-method>GET</http-method>
 <http-method>POST</http-method>
 </web-resource-collection>
 <!-- HTTPS/SSL -->
 <user-data-constraint>
 <transport-guarantee>CONFIDENTIAL</transport-guarantee>
 </user-data-constraint>
 </security-constraint>

 <login-config>
 <auth-method>FORM</auth-method>
 <realm-name>emfg</realm-name>
 <form-login-config>
 <form-login-page>/EmLogin</form-login-page>
 <form-error-page>/EmLogin?RESULTID=ERROR</form-error-page>
 </form-login-config>
 </login-config>

//Controller Servlet
 private void doTask(
 HttpServletRequest request,
 HttpServletResponse response)
 throws ServletException, IOException {

 resultId = (String) request.getParameter(RequestInf.REQ_RESULT_ID);

 try {
 if (resultId == null) {
 nextPage = getLoginView(request, response);
 } else if (resultId.equalsIgnoreCase(RESULT_LOGOUT)) {
 nextPage = getLogoutView(request, response);
 } else if (resultId.equalsIgnoreCase(RESULT_ERROR)) {
 nextPage = getErrorView(request, response);
 }

 ...

 } catch (Exception e) {
 EmfgLogger.error(e);
 }

 // nextPage <- Login View
 request.getRequestDispatcher(nextPage).forward(request, response);
 }

 ...

 <form method="POST" action='<%= response.encodeURL("j_security_check") %>' >
 <INPUT type="hidden" name="RESULT_ID">
 <TABLE>
 <TR>
 <TD colspan=3 align=center><FONT color=red><%=title%></TD>
 </TR>
 <TR>
 <TD width=10> </TD>
 <TD>USER-ID</TD>
 <TD><INPUT type="text" name= "j_username" size=20 maxlength=32 style="font-size:13"></TD>
 </TR>
 <TR>
 <TD width=10> </TD>
 <TD>PASSWORD</TD>
 <TD><INPUT type="password" name= "j_password" size=20 maxlength=64 style="font-size:13"></TD>
 </TR>
 <TR>
 <TD colspan=3 align=center><input type=submit></TD>
 </TR>
 </TABLE>
 </form>

 ...