Metacat

<%@ page import="edu.ucsb.nceas.metacat.client.*" %>

<% 

 /**

  *  '$RCSfile$'

  *      Authors: Matt Jones, Chad Berkley

  *    Copyright: 2000 Regents of the University of California and the

  *               National Center for Ecological Analysis and Synthesis

  *  For Details: http://www.nceas.ucsb.edu/

  *

  *   '$Author: daigle $'

  *     '$Date: 2008-04-02 16:28:31 -0700 (Wed, 02 Apr 2008) $'

  * '$Revision: 3780 $'

  * 

  * This program is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation; either version 2 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program; if not, write to the Free Software

  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  *

  * This is an XSLT (http://www.w3.org/TR/xslt) stylesheet designed to

  * convert an XML file showing the resultset of a query

  * into an HTML format suitable for rendering with modern web browsers.

  */

  //////////////////////////////////////////////////////////////////////////////

  //

  // NOTE:

  //

  //  GLOBAL CONSTANTS (SETTINGS SUCH AS METACAT URL, LDAP DOMAIN  AND DEBUG 

  //  SWITCH) ARE ALL IN THE INCLUDE FILE "PORTAL_SETTINGS.jsp"

  //

  //////////////////////////////////////////////////////////////////////////////

  // GLOBAL VARIABLES //////////////////////////////////////////////////////////

  String      loginStatus              = null;

  String      sess_sessionId           = null;

  String      sessionidField           = null;

  String      metacatResponse          = null;

  String      posted_ldapUserName      = null;

  String      typedUserName            = null;

  String      posted_organization      = null;

  String      posted_password          = null;

  String      loginAction              = null;

  String      loginButtonLabel         = null;

  String      loginEnabledDisabled     = null;

  Metacat     metacat                  = null;

  HttpSession rfSession                = null;

  boolean     isLoggedIn               = false;

//String      include_portalhead_title = null;

  //////////////////////////////////////////////////////////////////////////////  

  try {

    rfSession = request.getSession(true);

  } catch(Exception e) {

    throw new ServletException("trying to get session: "+e);

  }

  Object sess_sessionIdObj = rfSession.getAttribute("sess_sessionIdObj");

  if (sess_sessionIdObj!=null) {

    sess_sessionId = (String)sess_sessionIdObj;

    // if sess_sessionIdObj is empty string, that means user has logged out

    // (had problems if I set it to null, so used empty string instead)

    if (sess_sessionId.length() < 1) sess_sessionId = null;

    else isLoggedIn = true;

  } else {

    sess_sessionId = null;

  }

  typedUserName   = request.getParameter("username");

  typedUserName   = (typedUserName!=null)? typedUserName.trim() : "";

  posted_organization = request.getParameter("organization");

  posted_organization = (posted_organization!=null)? posted_organization.trim() : "";

  posted_ldapUserName = "uid=" + typedUserName 

                        + ",o=" + posted_organization + LDAP_DOMAIN;

  posted_password = request.getParameter("password");

  posted_password = (posted_password!=null)? posted_password.trim() : "";

  loginAction     = request.getParameter("loginAction");

  loginAction     = (loginAction!=null)? loginAction.trim() : "";

  //////////////////////////////////////////////////////////////////////////////  

  if (loginAction.equals(LOGOUT_LABEL)) { 

  // DO LOGOUT //////////////////////////////////////////////////////////////    

    if (sess_sessionId!=null && rfSession.getAttribute("sess_metacatObj")!=null) {

      metacat = (Metacat)(rfSession.getAttribute("sess_metacatObj"));

      metacat.logout();      

    }

    sess_sessionId = null;

    rfSession.setAttribute("sess_sessionIdObj", "");

    isLoggedIn = false;

  } else if (loginAction.equals(LOGIN_LABEL)) {  

  // DO LOGIN ////////////////////////////////////////////////////////////////  

    if (sess_sessionId!=null) isLoggedIn = true;    

    else {

      // get metacat object - either cached from session...

      if (rfSession.getAttribute("sess_metacatObj")!=null) {

        metacat = (Metacat)(rfSession.getAttribute("sess_metacatObj"));

      } else {   // ...or create it if it doesn't already exist

        try {

          metacat = MetacatFactory.createMetacatConnection(SERVLET_URL);

        } catch (MetacatInaccessibleException mie) {

          throw new ServletException("Metacat connection to "+SERVLET_URL

                                                +" failed." + mie.getMessage());

        }

        if (metacat==null) {

          throw new ServletException("Metacat connection to "+SERVLET_URL

                                          +" failed - Metacat object is NULL!");

        }

        rfSession.setAttribute("sess_metacatObj", metacat);

      }

      // now do login...

      try {

          metacatResponse = metacat.login(posted_ldapUserName, posted_password);

          if (metacatResponse!=null && metacatResponse.indexOf("<login>") >= 0) {

            sess_sessionId = metacat.getSessionId();

            rfSession.setAttribute("sess_sessionIdObj", 

                                  ((sess_sessionId!=null)? sess_sessionId: "") );

            isLoggedIn = true;

          } else {

            loginStatus = "<em class=\"italic\">Incorrect username or password - please try again</em>";

            isLoggedIn = false;

          }

      } catch (MetacatAuthException mae) {

          loginStatus = "<em class=\"italic\">Incorrect username or password! - please try again</em>";

          isLoggedIn = false;

      } catch (MetacatInaccessibleException mie) {

          isLoggedIn = false;

          loginStatus = "<em class=\"italic\">ERROR logging in - problems connecting - please try later</em>";

      }

    }

  }

  //////////////////////////////////////////////////////////////////////////////  

  if (isLoggedIn) {

    loginButtonLabel     = LOGOUT_LABEL;

    loginEnabledDisabled = "disabled";

    if (sess_sessionId!=null && sess_sessionId.length()>0) {

      sessionidField = "<input type=\"hidden\" name=\"sessionid\"     value=\""

                                                          +sess_sessionId+"\">";

    } else {

      sessionidField = "";

    }

    // if loginStatus has already been set above, don't overwrite it...

    if (loginStatus==null) loginStatus 

                          = "<em class=\"italic\">logged in as: " +posted_ldapUserName+"</em>";

  } else {

    loginButtonLabel     = LOGIN_LABEL;

    loginEnabledDisabled = "";

    sessionidField = "";

    // if loginStatus has already been set above, don't overwrite it...

    if (loginStatus==null) loginStatus 

                      = "<em class=\"italic\">Not logged in: </em>";

  }

  if (DEBUG_TO_BROWSER) {

%>  

<div id="debug">              

  <ul>

    <li>SERVLET_URL:&nbsp;<%=SERVLET_URL%></li>

    <li>rfSession:&nbsp;<%=rfSession%></li>

    <li>metacatResponse:&nbsp;<%=metacatResponse%></li>

    <li>posted_ldapUserName:&nbsp;<%=posted_ldapUserName%></li>

    <li>posted_password:&nbsp;<%=posted_password%></li>

    <li>isLoggedIn:&nbsp;<%=isLoggedIn%></li>

    <li>sess_sessionId LOCAL:&nbsp;<%=sess_sessionId%></li>

    <li>sess_sessionIdObj FROM SESSION:&nbsp;<%=rfSession.getAttribute("sess_sessionIdObj")%></li>

  </ul>

</div>

<%

  }

%>