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      relativeRoot          = ".";

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

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

						isLoggedIn = false;

					}

			} catch (MetacatAuthException mae) {

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

					isLoggedIn = false;

			} catch (MetacatInaccessibleException mie) {

					isLoggedIn = false;

					loginStatus = "<em class=\"loginStatus\">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=\"loginStatus\">You ARE logged in</em>";

  } else {

		loginButtonLabel     = LOGIN_LABEL;

		loginEnabledDisabled = "";

	  sessionidField = "";

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

	  if (loginStatus==null) loginStatus 

                      = "<em class=\"loginStatus\">You are NOT logged in</em>";

	}

  if (DEBUG_TO_BROWSER) {

%>	

<table>							

	<tr> 

		<td colspan="4" align="left" valign="top" class="text_plain" bgcolor="#ffff00">

			<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></td>

  </tr>

</table>

<%

  }

%>