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/**
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* '$RCSfile$'
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* Purpose: A Class that implements a metadata catalog as a java Servlet
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones, Dan Higgins, Jivka Bojilova, Chad Berkley
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* Release: @release@
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*
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* '$Author: bojilova $'
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* '$Date: 2001-02-06 13:51:17 -0800 (Tue, 06 Feb 2001) $'
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* '$Revision: 695 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.PrintWriter;
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringReader;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.InputStreamReader;
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import java.io.DataInputStream;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.ResourceBundle;
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import java.util.Random;
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import java.util.PropertyResourceBundle;
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import java.net.URL;
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import java.net.MalformedURLException;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.Connection;
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import java.sql.SQLException;
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import java.lang.reflect.*;
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import java.net.*;
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import java.util.zip.*;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.ServletInputStream;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import javax.servlet.http.HttpUtils;
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import javax.servlet.ServletOutputStream;
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import oracle.xml.parser.v2.XSLStylesheet;
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import oracle.xml.parser.v2.XSLException;
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import oracle.xml.parser.v2.XMLDocumentFragment;
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import oracle.xml.parser.v2.XSLProcessor;
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import org.xml.sax.SAXException;
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/**
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* A metadata catalog server implemented as a Java Servlet
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*
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* <p>Valid parameters are:<br>
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* action=query -- query the values of all elements and attributes
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* and return a result set of nodes<br>
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* action=squery -- structured query (see pathquery.dtd)<br>
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* action=insert -- insert an XML document into the database store<br>
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* action=update -- update an XML document that is in the database store<br>
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* action=delete -- delete an XML document from the database store<br>
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* action=validate -- vallidate the xml contained in valtext<br>
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* action=read -- display an XML document in XML or HTML<br>
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* doctype -- document type list returned by the query (publicID)<br>
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* qformat=xml -- display resultset from query in XML<br>
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* qformat=html -- display resultset from query in HTML<br>
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* docid=34 -- display the document with the document ID number 34<br>
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* doctext -- XML text of the document to load into the database<br>
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* acltext -- XML access text for a document to load into the database<br>
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* dtdtext -- XML DTD text for a new DTD to load into Metacat XML Catalog<br>
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* query -- actual query text (to go with 'action=query' or 'action=squery')<br>
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* valtext -- XML text to be validated<br>
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* action=getdatadoc -- retrieve a stored datadocument<br>
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* action=getaccesscontrol -- retrieve acl info for Metacat document<br>
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* action=getdoctypes -- retrieve all doctypes (publicID)<br>
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* action=getdataguide -- retrieve a Data Guide<br>
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* datadoc -- data document name (id)<br>
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* <p>
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* The particular combination of parameters that are valid for each
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* particular action value is quite specific. This documentation
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* will be reorganized to reflect this information.
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*/
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public class MetaCatServlet extends HttpServlet {
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private ServletConfig config = null;
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private ServletContext context = null;
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private Hashtable connectionPool = new Hashtable();
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private String resultStyleURL = null;
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private String xmlcatalogfile = null;
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private String saxparser = null;
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private String defaultdatapath = null;
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private String servletpath = null;
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private PropertyResourceBundle options = null;
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private MetaCatUtil util = null;
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// path to directory where data files
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// that can be downloaded will be stored
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private String htmlpath = null;
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// script to get data file and put it
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// in defaultdocpath dir
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private String executescript = null;
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/**
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* Initialize the servlet by creating appropriate database connections
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*/
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public void init( ServletConfig config ) throws ServletException {
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try {
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super.init( config );
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this.config = config;
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this.context = config.getServletContext();
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System.out.println("MetaCatServlet Initialize");
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util = new MetaCatUtil();
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// Get the configuration file information
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resultStyleURL = util.getOption("resultStyleURL");
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xmlcatalogfile = util.getOption("xmlcatalogfile");
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saxparser = util.getOption("saxparser");
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defaultdatapath = util.getOption("defaultdatapath");
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executescript = util.getOption("executescript");
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servletpath = util.getOption("servletpath");
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htmlpath = util.getOption("htmlpath");
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// try {
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// // Open a pool of db connections
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// connectionPool = util.getConnectionPool();
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// } catch (Exception e) {
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// System.err.println("Error creating pool of database connections");
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// System.err.println(e.getMessage());
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// }
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} catch ( ServletException ex ) {
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throw ex;
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}
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}
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/**
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* Close all db connections from the pool
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*/
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public void destroy() {
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if (util != null) {
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util.closeConnections();
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}
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}
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/** Handle "GET" method requests from HTTP clients */
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public void doGet (HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// Process the data and send back the response
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handleGetOrPost(request, response);
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}
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/** Handle "POST" method requests from HTTP clients */
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public void doPost( HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// Process the data and send back the response
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handleGetOrPost(request, response);
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}
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/**
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* Control servlet response depending on the action parameter specified
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*/
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private void handleGetOrPost(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException
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{
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if ( util == null ) {
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util = new MetaCatUtil();
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}
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if ( connectionPool.isEmpty() ) {
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try {
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// Open a pool of db connections
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connectionPool = util.getConnectionPool();
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} catch (Exception e) {
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System.err.println("Error creating pool of database connections in " +
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" MetaCatServlet.handleGetOrPost");
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System.err.println(e.getMessage());
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}
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}
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// Get a handle to the output stream back to the client
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//PrintWriter pwout = response.getWriter();
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//response.setContentType("text/html");
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String name = null;
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String[] value = null;
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String[] docid = new String[3];
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Hashtable params = new Hashtable();
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Enumeration paramlist = request.getParameterNames();
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while (paramlist.hasMoreElements()) {
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name = (String)paramlist.nextElement();
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value = request.getParameterValues(name);
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// Decode the docid and mouse click information
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if (name.endsWith(".y")) {
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docid[0] = name.substring(0,name.length()-2);
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//out.println("docid => " + docid[0]);
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params.put("docid", docid);
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name = "ypos";
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}
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if (name.endsWith(".x")) {
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name = "xpos";
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}
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//pwout.println(name + " => " + value[0]);
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params.put(name,value);
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}
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//if the user clicked on the input images, decode which image
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//was clicked then set the action.
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String action = ((String[])params.get("action"))[0];
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util.debugMessage("Line 213: Action is: " + action);
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236
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237
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//MBJELIMINATE String action = decodeMouseAction(params);
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//if(action.equals("error"))
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//{
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240
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//util.debugMessage("Line 218: Action is: " + action);
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241
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//action = ((String[])params.get("action"))[0];
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//}
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243
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244
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// This block handles session management for the servlet
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// by looking up the current session information for all actions
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// other than "login" and "logout"
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String username = null;
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String groupname = null;
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249
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String sess_id = null;
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250
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251
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// handle login action
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252
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if (action.equals("login")) {
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253
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254
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handleLoginAction(response.getWriter(), params, request, response);
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255
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256
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// handle logout action
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257
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} else if (action.equals("logout")) {
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258
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259
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handleLogoutAction(response.getWriter(), params, request, response);
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260
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261
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// aware of session expiration on every request
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262
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} else {
|
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263
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264
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HttpSession sess = request.getSession(true);
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265
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if (sess.isNew()) {
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266
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// session expired or has not been stored b/w user requests
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267
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username = "public";
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268
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sess.setAttribute("username", username);
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269
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} else {
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270
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username = (String)sess.getAttribute("username");
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271
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groupname = (String)sess.getAttribute("groupname");
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272
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try
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273
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{
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274
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sess_id = (String)sess.getId();
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275
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}
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276
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catch(IllegalStateException ise)
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277
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{
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278
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System.out.println("error in handleGetOrPost: this shouldn't " +
|
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279
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"happen: the session should be valid: " +
|
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280
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ise.getMessage());
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281
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}
|
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282
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}
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283
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}
|
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284
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285
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// Now that we know the session is valid, we can delegate the request
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286
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// to a particular action handler
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287
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if(action.equals("query"))
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288
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{
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|
289
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handleQuery(response.getWriter(), params, response, username, groupname);
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290
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}
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|
291
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else if(action.equals("squery"))
|
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292
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{
|
|
293
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if(params.containsKey("query"))
|
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294
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{
|
|
295
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handleSQuery(response.getWriter(), params, response, username, groupname);
|
|
296
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}
|
|
297
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else
|
|
298
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{
|
|
299
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PrintWriter out = response.getWriter();
|
|
300
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out.println("Illegal action squery without \"query\" parameter");
|
|
301
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}
|
|
302
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}
|
|
303
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else if (action.equals("read")) {
|
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304
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//PrintWriter out = response.getWriter();
|
|
305
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try {
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306
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handleReadAction(/*out,*/ params, response, username);
|
|
307
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} catch (ClassNotFoundException e) {
|
|
308
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System.out.println("Error in MetacatServlet.handlGetOrPost: " +
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|
309
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e.getMessage());
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310
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} catch (SQLException se) {
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311
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System.out.println("Error in MetaCatServlet.handleGetOrPost: " +
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312
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se.getMessage());
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|
313
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}
|
|
314
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}
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|
315
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/*
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|
316
|
else if (action.equals("getrelateddocument")) {
|
|
317
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PrintWriter out = response.getWriter();
|
|
318
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try {
|
|
319
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handleGetRelatedDocumentAction(out, params, response);
|
|
320
|
} catch (ClassNotFoundException e) {
|
|
321
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out.println(e.getMessage());
|
|
322
|
} catch (SQLException se) {
|
|
323
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out.println(se.getMessage());
|
|
324
|
}
|
|
325
|
}
|
|
326
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*/
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|
327
|
else if (action.equals("insert") || action.equals("update")) {
|
|
328
|
PrintWriter out = response.getWriter();
|
|
329
|
if ( (username != null) && !username.equals("public") ) {
|
|
330
|
handleInsertOrUpdateAction(out, params, response, username, groupname);
|
|
331
|
} else {
|
|
332
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out.println("Permission denied for " + action);
|
|
333
|
}
|
|
334
|
} else if (action.equals("delete")) {
|
|
335
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PrintWriter out = response.getWriter();
|
|
336
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if ( (username != null) && !username.equals("public") ) {
|
|
337
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handleDeleteAction(out, params, response, username, groupname);
|
|
338
|
} else {
|
|
339
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out.println("Permission denied for " + action);
|
|
340
|
}
|
|
341
|
} else if (action.equals("validate")) {
|
|
342
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PrintWriter out = response.getWriter();
|
|
343
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handleValidateAction(out, params, response);
|
|
344
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} else if (action.equals("getabstract")) {
|
|
345
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PrintWriter out = response.getWriter();
|
|
346
|
try{
|
|
347
|
handleViewAbstractAction(out, params, response);
|
|
348
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}
|
|
349
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catch(Exception e)
|
|
350
|
{
|
|
351
|
out.println("error viewing abstract from " +
|
|
352
|
"MetacatServlet.handleGetorPost: " + e.getMessage());
|
|
353
|
}
|
|
354
|
} else if (action.equals("getdatadoc")) {
|
|
355
|
response.setContentType("application/zip");
|
|
356
|
ServletOutputStream out = response.getOutputStream();
|
|
357
|
handleGetDataDocumentAction(out, params, response);
|
|
358
|
} else if (action.equals("getaccesscontrol")) {
|
|
359
|
PrintWriter out = response.getWriter();
|
|
360
|
handleGetAccessControlAction(out, params, response, username, groupname);
|
|
361
|
} else if (action.equals("getdoctypes")) {
|
|
362
|
PrintWriter out = response.getWriter();
|
|
363
|
handleGetDoctypesAction(out, params, response);
|
|
364
|
} else if (action.equals("getdataport")) {
|
|
365
|
PrintWriter out = response.getWriter();
|
|
366
|
if ( (username != null) && !username.equals("public") ) {
|
|
367
|
handleGetDataPortAction(out, params, response, username, groupname,
|
|
368
|
sess_id);
|
|
369
|
} else {
|
|
370
|
out.println("You must be authenticated to perform the getdataport " +
|
|
371
|
"action!");
|
|
372
|
}
|
|
373
|
} else if (action.equals("getdataguide")) {
|
|
374
|
PrintWriter out = response.getWriter();
|
|
375
|
handleGetDataGuideAction(out, params, response);
|
|
376
|
} else if (action.equals("login") || action.equals("logout")) {
|
|
377
|
} else if (action.equals("protocoltest")) {
|
|
378
|
String testURL = "metacat://dev.nceas.ucsb.edu/NCEAS.897766.9";
|
|
379
|
try {
|
|
380
|
testURL = ((String[])params.get("url"))[0];
|
|
381
|
} catch (Throwable t) {
|
|
382
|
}
|
|
383
|
String phandler = System.getProperty("java.protocol.handler.pkgs");
|
|
384
|
response.setContentType("text/html");
|
|
385
|
PrintWriter out = response.getWriter();
|
|
386
|
out.println("<body bgcolor=\"white\">");
|
|
387
|
out.println("<p>Handler property: <code>" + phandler + "</code></p>");
|
|
388
|
out.println("<p>Starting test for:<br>");
|
|
389
|
out.println(" " + testURL + "</p>");
|
|
390
|
try {
|
|
391
|
URL u = new URL(testURL);
|
|
392
|
out.println("<pre>");
|
|
393
|
out.println("Protocol: " + u.getProtocol());
|
|
394
|
out.println(" Host: " + u.getHost());
|
|
395
|
out.println(" Port: " + u.getPort());
|
|
396
|
out.println(" Path: " + u.getPath());
|
|
397
|
out.println(" Ref: " + u.getRef());
|
|
398
|
String pquery = u.getQuery();
|
|
399
|
out.println(" Query: " + pquery);
|
|
400
|
out.println(" Params: ");
|
|
401
|
if (pquery != null) {
|
|
402
|
Hashtable qparams = util.parseQuery(u.getQuery());
|
|
403
|
for (Enumeration en = qparams.keys(); en.hasMoreElements(); ) {
|
|
404
|
String pname = (String)en.nextElement();
|
|
405
|
String pvalue = (String)qparams.get(pname);
|
|
406
|
out.println(" " + pname + ": " + pvalue);
|
|
407
|
}
|
|
408
|
}
|
|
409
|
out.println("</pre>");
|
|
410
|
out.println("</body>");
|
|
411
|
out.close();
|
|
412
|
} catch (MalformedURLException mue) {
|
|
413
|
System.out.println("bad url from MetacatServlet.handleGetOrPost");
|
|
414
|
out.println(mue.getMessage());
|
|
415
|
mue.printStackTrace(out);
|
|
416
|
out.close();
|
|
417
|
}
|
|
418
|
} else {
|
|
419
|
PrintWriter out = response.getWriter();
|
|
420
|
out.println("Error: action not registered. Please report this error.");
|
|
421
|
}
|
|
422
|
util.closeConnections();
|
|
423
|
// Close the stream to the client
|
|
424
|
//out.close();
|
|
425
|
}
|
|
426
|
|
|
427
|
/**
|
|
428
|
* decodes the mouse click information coming from the client.
|
|
429
|
* This function may be overwritten to provide specific functionality
|
|
430
|
* for different applications.
|
|
431
|
* @param params the parameters from the CGI
|
|
432
|
* @return action the action to be performed or "error" if an error was
|
|
433
|
* generated
|
|
434
|
*/
|
|
435
|
protected String decodeMouseAction(Hashtable params)
|
|
436
|
{
|
|
437
|
// Determine what type of request the user made
|
|
438
|
// if the action parameter is set, use it as a default
|
|
439
|
// but if the ypos param is set, calculate the action needed
|
|
440
|
String action=null;
|
|
441
|
long ypos = 0;
|
|
442
|
try {
|
|
443
|
ypos = (new Long(((String[])params.get("ypos"))[0]).longValue());
|
|
444
|
//out.println("<P>YPOS IS " + ypos);
|
|
445
|
if (ypos <= 13) {
|
|
446
|
action = "read";
|
|
447
|
} else if (ypos > 13 && ypos <= 27) {
|
|
448
|
action = "validate";
|
|
449
|
} else if (ypos > 27) {
|
|
450
|
action = "transform";
|
|
451
|
}
|
|
452
|
return action;
|
|
453
|
} catch (Exception npe) {
|
|
454
|
//
|
|
455
|
// MBJ -- NOTE that this should be handled more gracefully with
|
|
456
|
// the new exception infrastructure -- this "error" return
|
|
457
|
// value is inappropriate
|
|
458
|
//out.println("<P>Caught exception looking for Y value.");
|
|
459
|
return "error";
|
|
460
|
}
|
|
461
|
}
|
|
462
|
|
|
463
|
/**
|
|
464
|
* sends the port number that the data socket is running on. This is a
|
|
465
|
* parameter set in the metacat.properties file.
|
|
466
|
*/
|
|
467
|
private void handleGetDataPortAction(PrintWriter out, Hashtable params,
|
|
468
|
HttpServletResponse response,
|
|
469
|
String username, String groupname,
|
|
470
|
String sess_id)
|
|
471
|
{
|
|
472
|
int port;
|
|
473
|
String filedir = null;
|
|
474
|
try
|
|
475
|
{
|
|
476
|
filedir = util.getOption("datafilepath");
|
|
477
|
|
|
478
|
Random r = new Random();
|
|
479
|
port = r.nextInt(65000); //pick a random port between 0-65000
|
|
480
|
//System.out.println("random port is: " + port);
|
|
481
|
while(!DataFileServer.portIsAvailable(port))
|
|
482
|
{
|
|
483
|
port = r.nextInt(65000);
|
|
484
|
//System.out.println("next port used: " + port);
|
|
485
|
}
|
|
486
|
DataFileServer dfs = new DataFileServer(port, username, sess_id);
|
|
487
|
dfs.start();
|
|
488
|
|
|
489
|
//System.out.println("filedir: " + filedir);
|
|
490
|
//System.out.println("port: " + port);
|
|
491
|
response.setContentType("text/xml");
|
|
492
|
out.println("<?xml version=\"1.0\"?>");
|
|
493
|
out.println("<port>");
|
|
494
|
out.print(port);
|
|
495
|
out.print("</port>");
|
|
496
|
|
|
497
|
}
|
|
498
|
catch (Exception e)
|
|
499
|
{
|
|
500
|
System.out.println("error in MetacatServlet.handleGetDataPortAction: " +
|
|
501
|
e.getMessage());
|
|
502
|
}
|
|
503
|
}
|
|
504
|
|
|
505
|
/**
|
|
506
|
* Handle the login request. Create a new session object.
|
|
507
|
* Do user authentication through the session.
|
|
508
|
*/
|
|
509
|
private void handleLoginAction(PrintWriter out, Hashtable params,
|
|
510
|
HttpServletRequest request, HttpServletResponse response) {
|
|
511
|
|
|
512
|
AuthSession sess = null;
|
|
513
|
String un = ((String[])params.get("username"))[0];
|
|
514
|
String pw = ((String[])params.get("password"))[0];
|
|
515
|
String action = ((String[])params.get("action"))[0];
|
|
516
|
String qformat = ((String[])params.get("qformat"))[0];
|
|
517
|
|
|
518
|
try {
|
|
519
|
sess = new AuthSession();
|
|
520
|
} catch (Exception e) {
|
|
521
|
System.out.println("error in MetacatServlet.handleLoginAction: " +
|
|
522
|
e.getMessage());
|
|
523
|
out.println(e.getMessage());
|
|
524
|
return;
|
|
525
|
}
|
|
526
|
|
|
527
|
boolean isValid = sess.authenticate(request, un, pw);
|
|
528
|
|
|
529
|
// format and transform the output
|
|
530
|
if (qformat.equals("html")) {
|
|
531
|
Connection conn = null;
|
|
532
|
try {
|
|
533
|
conn = util.getConnection();
|
|
534
|
DBTransform trans = new DBTransform(conn);
|
|
535
|
response.setContentType("text/html");
|
|
536
|
trans.transformXMLDocument(sess.getMessage(), "-//NCEAS//login//EN",
|
|
537
|
"-//W3C//HTML//EN", out);
|
|
538
|
util.returnConnection(conn);
|
|
539
|
} catch(Exception e) {
|
|
540
|
util.returnConnection(conn);
|
|
541
|
}
|
|
542
|
|
|
543
|
// any output is returned
|
|
544
|
} else {
|
|
545
|
response.setContentType("text/xml");
|
|
546
|
out.println(sess.getMessage());
|
|
547
|
}
|
|
548
|
|
|
549
|
/* WITHOUT XSLT transformation
|
|
550
|
// redirects response to html page
|
|
551
|
if (qformat.equals("html")) {
|
|
552
|
// user authentication successful
|
|
553
|
if (isValid) {
|
|
554
|
response.sendRedirect(
|
|
555
|
response.encodeRedirectUrl(htmlpath + "/metacat.html"));
|
|
556
|
// unsuccessful user authentication
|
|
557
|
} else {
|
|
558
|
response.sendRedirect(htmlpath + "/login.html");
|
|
559
|
}
|
|
560
|
// any output is returned
|
|
561
|
} else {
|
|
562
|
response.setContentType("text/xml");
|
|
563
|
out.println(sess.getMessage());
|
|
564
|
}
|
|
565
|
*/
|
|
566
|
|
|
567
|
}
|
|
568
|
|
|
569
|
/**
|
|
570
|
* Handle the logout request. Close the connection.
|
|
571
|
*/
|
|
572
|
private void handleLogoutAction(PrintWriter out, Hashtable params,
|
|
573
|
HttpServletRequest request, HttpServletResponse response) {
|
|
574
|
|
|
575
|
String qformat = ((String[])params.get("qformat"))[0];
|
|
576
|
|
|
577
|
// close the connection
|
|
578
|
HttpSession sess = request.getSession(false);
|
|
579
|
if (sess != null) { sess.invalidate(); }
|
|
580
|
|
|
581
|
// produce output
|
|
582
|
StringBuffer output = new StringBuffer();
|
|
583
|
output.append("<?xml version=\"1.0\"?>");
|
|
584
|
output.append("<logout>");
|
|
585
|
output.append("User logged out");
|
|
586
|
output.append("</logout>");
|
|
587
|
|
|
588
|
//format and transform the output
|
|
589
|
if (qformat.equals("html")) {
|
|
590
|
Connection conn = null;
|
|
591
|
try {
|
|
592
|
conn = util.getConnection();
|
|
593
|
DBTransform trans = new DBTransform(conn);
|
|
594
|
response.setContentType("text/html");
|
|
595
|
trans.transformXMLDocument(output.toString(), "-//NCEAS//login//EN",
|
|
596
|
"-//W3C//HTML//EN", out);
|
|
597
|
util.returnConnection(conn);
|
|
598
|
} catch(Exception e) {
|
|
599
|
util.returnConnection(conn);
|
|
600
|
}
|
|
601
|
// any output is returned
|
|
602
|
} else {
|
|
603
|
response.setContentType("text/xml");
|
|
604
|
out.println(output.toString());
|
|
605
|
}
|
|
606
|
|
|
607
|
/* WITHOUT XSLT transformation
|
|
608
|
// redirects response to html page
|
|
609
|
if (qformat.equals("html")) {
|
|
610
|
response.sendRedirect(htmlpath + "/index.html");
|
|
611
|
} catch(Exception e) {
|
|
612
|
util.returnConnection(conn);
|
|
613
|
}
|
|
614
|
// any output is returned
|
|
615
|
} else {
|
|
616
|
response.setContentType("text/xml");
|
|
617
|
out.println(output.toString());
|
|
618
|
}
|
|
619
|
*/
|
|
620
|
}
|
|
621
|
|
|
622
|
|
|
623
|
/**
|
|
624
|
* Retreive the squery xml, execute it and display it
|
|
625
|
*
|
|
626
|
* @param out the output stream to the client
|
|
627
|
* @param params the Hashtable of parameters that should be included
|
|
628
|
* in the squery.
|
|
629
|
* @param response the response object linked to the client
|
|
630
|
* @param conn the database connection
|
|
631
|
*/
|
|
632
|
protected void handleSQuery(PrintWriter out, Hashtable params,
|
|
633
|
HttpServletResponse response, String user, String group)
|
|
634
|
{
|
|
635
|
String xmlquery = ((String[])params.get("query"))[0];
|
|
636
|
String qformat = ((String[])params.get("qformat"))[0];
|
|
637
|
String resultdoc = null;
|
|
638
|
String[] returndoc = null;
|
|
639
|
if(params.contains("returndoc"))
|
|
640
|
{
|
|
641
|
returndoc = (String[])params.get("returndoc");
|
|
642
|
}
|
|
643
|
|
|
644
|
Hashtable doclist = runQuery(xmlquery, user, group, returndoc);
|
|
645
|
//String resultdoc = createResultDocument(doclist, transformQuery(xmlquery));
|
|
646
|
|
|
647
|
resultdoc = createResultDocument(doclist, transformQuery(xmlquery));
|
|
648
|
|
|
649
|
//format and transform the results
|
|
650
|
if(qformat.equals("html")) {
|
|
651
|
transformResultset(resultdoc, response, out);
|
|
652
|
} else if(qformat.equals("xml")) {
|
|
653
|
response.setContentType("text/xml");
|
|
654
|
out.println(resultdoc);
|
|
655
|
} else {
|
|
656
|
out.println("invalid qformat: " + qformat);
|
|
657
|
}
|
|
658
|
}
|
|
659
|
|
|
660
|
/**
|
|
661
|
* Create the xml query, execute it and display the results.
|
|
662
|
*
|
|
663
|
* @param out the output stream to the client
|
|
664
|
* @param params the Hashtable of parameters that should be included
|
|
665
|
* in the squery.
|
|
666
|
* @param response the response object linked to the client
|
|
667
|
*/
|
|
668
|
protected void handleQuery(PrintWriter out, Hashtable params,
|
|
669
|
HttpServletResponse response, String user, String group)
|
|
670
|
{
|
|
671
|
//create the query and run it
|
|
672
|
String[] returndoc = null;
|
|
673
|
if(params.containsKey("returndoc"))
|
|
674
|
{
|
|
675
|
returndoc = (String[])params.get("returndoc");
|
|
676
|
}
|
|
677
|
String xmlquery = DBQuery.createSQuery(params);
|
|
678
|
Hashtable doclist = runQuery(xmlquery, user, group, returndoc);
|
|
679
|
String qformat = ((String[])params.get("qformat"))[0];
|
|
680
|
String resultdoc = null;
|
|
681
|
|
|
682
|
resultdoc = createResultDocument(doclist, transformQuery(params));
|
|
683
|
|
|
684
|
//format and transform the results
|
|
685
|
if(qformat.equals("html")) {
|
|
686
|
transformResultset(resultdoc, response, out);
|
|
687
|
} else if(qformat.equals("xml")) {
|
|
688
|
response.setContentType("text/xml");
|
|
689
|
out.println(resultdoc);
|
|
690
|
} else {
|
|
691
|
out.println("invalid qformat: " + qformat);
|
|
692
|
}
|
|
693
|
}
|
|
694
|
|
|
695
|
/**
|
|
696
|
* Removes the <?xml version="x"?> tag from the beginning of xmlquery
|
|
697
|
* so it can properly be placed in the <query> tag of the resultset.
|
|
698
|
* This method is overwritable so that other applications can customize
|
|
699
|
* the structure of what is in the <query> tag.
|
|
700
|
*
|
|
701
|
* @param xmlquery is the query to remove the <?xml version="x"?> tag from.
|
|
702
|
*/
|
|
703
|
protected String transformQuery(Hashtable params)
|
|
704
|
{
|
|
705
|
//DBQuery.createSQuery is a re-calling of a previously called
|
|
706
|
//function but it is necessary
|
|
707
|
//so that overriding methods have access to the params hashtable
|
|
708
|
String xmlquery = DBQuery.createSQuery(params);
|
|
709
|
//the <?xml version="1.0"?> tag is the first 22 characters of the
|
|
710
|
xmlquery = xmlquery.trim();
|
|
711
|
int index = xmlquery.indexOf("?>");
|
|
712
|
return xmlquery.substring(index + 2, xmlquery.length());
|
|
713
|
}
|
|
714
|
|
|
715
|
/**
|
|
716
|
* removes the <?xml version="1.0"?> tag from the beginning. This takes a
|
|
717
|
* string as a param instead of a hashtable.
|
|
718
|
*
|
|
719
|
* @param xmlquery a string representing a query.
|
|
720
|
*/
|
|
721
|
protected String transformQuery(String xmlquery)
|
|
722
|
{
|
|
723
|
xmlquery = xmlquery.trim();
|
|
724
|
int index = xmlquery.indexOf("?>");
|
|
725
|
return xmlquery.substring(index + 2, xmlquery.length());
|
|
726
|
}
|
|
727
|
|
|
728
|
/**
|
|
729
|
* Run the query and return a hashtable of results.
|
|
730
|
*
|
|
731
|
* @param xmlquery the query to run
|
|
732
|
*/
|
|
733
|
private Hashtable runQuery(String xmlquery, String user, String group,
|
|
734
|
String[] returndoc)
|
|
735
|
{
|
|
736
|
Hashtable doclist=null;
|
|
737
|
Connection conn = null;
|
|
738
|
try
|
|
739
|
{
|
|
740
|
conn = util.getConnection();
|
|
741
|
DBQuery queryobj = new DBQuery(conn, saxparser);
|
|
742
|
doclist = queryobj.findDocuments(new StringReader(xmlquery),user,group,
|
|
743
|
returndoc);
|
|
744
|
util.returnConnection(conn);
|
|
745
|
return doclist;
|
|
746
|
}
|
|
747
|
catch (Exception e)
|
|
748
|
{
|
|
749
|
util.returnConnection(conn);
|
|
750
|
util.debugMessage("Error in MetacatServlet.runQuery: " + e.getMessage());
|
|
751
|
doclist = null;
|
|
752
|
return doclist;
|
|
753
|
}
|
|
754
|
}
|
|
755
|
|
|
756
|
/**
|
|
757
|
* Transorms an xml resultset document to html and sends it to the browser
|
|
758
|
*
|
|
759
|
* @param resultdoc the string representation of the document that needs
|
|
760
|
* to be transformed.
|
|
761
|
* @param response the HttpServletResponse object bound to the client.
|
|
762
|
* @param out the output stream to the client
|
|
763
|
*/
|
|
764
|
protected void transformResultset(String resultdoc,
|
|
765
|
HttpServletResponse response,
|
|
766
|
PrintWriter out)
|
|
767
|
{
|
|
768
|
Connection conn = null;
|
|
769
|
try {
|
|
770
|
conn = util.getConnection();
|
|
771
|
DBTransform trans = new DBTransform(conn);
|
|
772
|
response.setContentType("text/html");
|
|
773
|
trans.transformXMLDocument(resultdoc, "-//NCEAS//resultset//EN",
|
|
774
|
"-//W3C//HTML//EN", out);
|
|
775
|
util.returnConnection(conn);
|
|
776
|
}
|
|
777
|
catch(Exception e)
|
|
778
|
{
|
|
779
|
util.returnConnection(conn);
|
|
780
|
}
|
|
781
|
}
|
|
782
|
|
|
783
|
/**
|
|
784
|
* Transforms a hashtable of documents to an xml or html result.
|
|
785
|
* If there is a returndoc, then it only displays documents of
|
|
786
|
* whatever type returndoc represents. If a result is found in a document
|
|
787
|
* that is not of type returndoc then this attempts to find a relation
|
|
788
|
* between this document and one that satifies the returndoc doctype.
|
|
789
|
*
|
|
790
|
* @param doclist- the hashtable to transform
|
|
791
|
* @param xmlquery- the query that returned the dolist result
|
|
792
|
* @param resultdoc- the document type to backtrack to.
|
|
793
|
*/
|
|
794
|
protected String createResultDocument(Hashtable doclist, String xmlquery)
|
|
795
|
{
|
|
796
|
// Create a buffer to hold the xml result
|
|
797
|
StringBuffer resultset = new StringBuffer();
|
|
798
|
|
|
799
|
// Print the resulting root nodes
|
|
800
|
String docid = null;
|
|
801
|
String document = null;
|
|
802
|
resultset.append("<?xml version=\"1.0\"?>\n");
|
|
803
|
resultset.append("<resultset>\n");
|
|
804
|
|
|
805
|
resultset.append(" <query>" + xmlquery + "</query>");
|
|
806
|
|
|
807
|
if(doclist != null)
|
|
808
|
{
|
|
809
|
Enumeration doclistkeys = doclist.keys();
|
|
810
|
while (doclistkeys.hasMoreElements())
|
|
811
|
{
|
|
812
|
docid = (String)doclistkeys.nextElement();
|
|
813
|
document = (String)doclist.get(docid);
|
|
814
|
resultset.append(" <document>" + document + "</document>");
|
|
815
|
}
|
|
816
|
}
|
|
817
|
|
|
818
|
resultset.append("</resultset>");
|
|
819
|
//System.out.println(resultset.toString());
|
|
820
|
return resultset.toString();
|
|
821
|
}
|
|
822
|
|
|
823
|
/**
|
|
824
|
* Handle the request to view the abstract of a document.
|
|
825
|
* The abstractpath CGI parameter gives the xml path to the abstract
|
|
826
|
* node.
|
|
827
|
*/
|
|
828
|
private void handleViewAbstractAction(PrintWriter out, Hashtable params,
|
|
829
|
HttpServletResponse response) throws IOException, SQLException
|
|
830
|
{
|
|
831
|
String abstractpath = null;
|
|
832
|
String docid = null;
|
|
833
|
Connection conn = null;
|
|
834
|
response.setContentType("text/html");
|
|
835
|
try
|
|
836
|
{
|
|
837
|
docid = ((String[])params.get("docid"))[0];
|
|
838
|
if(params.containsKey("abstractpath"))
|
|
839
|
{
|
|
840
|
//the CGI parameter abstractpath holds the path to the abstract
|
|
841
|
//that should be displayed.
|
|
842
|
abstractpath = ((String[])params.get("abstractpath"))[0];
|
|
843
|
}
|
|
844
|
else
|
|
845
|
{
|
|
846
|
out.println("error: no abstractpath parameter");
|
|
847
|
}
|
|
848
|
conn = util.getConnection();
|
|
849
|
|
|
850
|
Object[] abstracts = DBQuery.getNodeContent(abstractpath, docid, conn);
|
|
851
|
|
|
852
|
out.println("<html><head><title>Abstract</title></head>");
|
|
853
|
out.println("<body bgcolor=\"white\"><h1>Abstract</h1>");
|
|
854
|
for(int i=0; i<abstracts.length; i++)
|
|
855
|
{
|
|
856
|
out.println("<p>" + (String)abstracts[i] + "</p>");
|
|
857
|
}
|
|
858
|
out.println("</body></html>");
|
|
859
|
}
|
|
860
|
catch (IOException ioe)
|
|
861
|
{
|
|
862
|
util.debugMessage("error in MetacatServlet.handlegetabstract: " +
|
|
863
|
ioe.getMessage());
|
|
864
|
System.out.println("IO error in MetacatServlet.handlegetabstract: " +
|
|
865
|
ioe.getMessage());
|
|
866
|
}
|
|
867
|
catch(SQLException sqle)
|
|
868
|
{
|
|
869
|
util.debugMessage("sql error in MetacatServLet.handlegetabstract: " +
|
|
870
|
sqle.getMessage());
|
|
871
|
System.out.println("sql error in MetacatServLet.handlegetabstract: " +
|
|
872
|
sqle.getMessage());
|
|
873
|
}
|
|
874
|
catch(Exception e)
|
|
875
|
{
|
|
876
|
util.debugMessage("error in handlegetabstract: " + e.getMessage());
|
|
877
|
System.out.println("error in MetacatServlEt.handlegetabstract: " +
|
|
878
|
e.getMessage());
|
|
879
|
}
|
|
880
|
|
|
881
|
util.returnConnection(conn);
|
|
882
|
}
|
|
883
|
|
|
884
|
/**
|
|
885
|
* Handle the database getrelateddocument request and return a XML document,
|
|
886
|
* possibly transformed from XML into HTML
|
|
887
|
*/
|
|
888
|
private void handleGetRelatedDocumentAction(PrintWriter out, Hashtable params,
|
|
889
|
HttpServletResponse response, URL murl)
|
|
890
|
throws ClassNotFoundException, IOException, SQLException
|
|
891
|
{
|
|
892
|
String docid = null;
|
|
893
|
Connection conn = null;
|
|
894
|
|
|
895
|
//if(params.containsKey("url"))
|
|
896
|
//{//the identifier for the related document is contained in the URL param
|
|
897
|
try
|
|
898
|
{
|
|
899
|
DocumentImpl xmldoc=null;
|
|
900
|
//MetacatURL murl = new MetacatURL(((String[])params.get("url"))[0]);
|
|
901
|
if(murl.getProtocol().equals("metacat"))
|
|
902
|
{//get the document from the database if it is the right type of url
|
|
903
|
//Hashtable murlParams = murl.getHashParams();
|
|
904
|
Hashtable murlParams = util.parseQuery(murl.getQuery());
|
|
905
|
if(murlParams.containsKey("docid"))
|
|
906
|
{//the docid should be first
|
|
907
|
docid = (String)murlParams.get("docid"); //get the docid value
|
|
908
|
conn = util.getConnection();
|
|
909
|
xmldoc = new DocumentImpl(conn, docid);
|
|
910
|
String qformat = ((String[])params.get("qformat"))[0];
|
|
911
|
if (qformat.equals("xml"))
|
|
912
|
{
|
|
913
|
// set content type and other response header fields first
|
|
914
|
response.setContentType("text/xml");
|
|
915
|
xmldoc.toXml(out);
|
|
916
|
//out.println(xmldoc);
|
|
917
|
}
|
|
918
|
else if (qformat.equals("html"))
|
|
919
|
{
|
|
920
|
response.setContentType("text/html");
|
|
921
|
// Look up the document type
|
|
922
|
String sourcetype = xmldoc.getDoctype();
|
|
923
|
// Transform the document to the new doctype
|
|
924
|
DBTransform dbt = new DBTransform(conn);
|
|
925
|
dbt.transformXMLDocument(xmldoc.toString(), sourcetype,
|
|
926
|
"-//W3C//HTML//EN", out);
|
|
927
|
}
|
|
928
|
|
|
929
|
util.returnConnection(conn);
|
|
930
|
}
|
|
931
|
else
|
|
932
|
{
|
|
933
|
//throw new Exception("handleGetDocument: bad URL");
|
|
934
|
System.err.println("handleGetDocument: bad URL");
|
|
935
|
}
|
|
936
|
}
|
|
937
|
else if(murl.getProtocol().equals("http"))
|
|
938
|
{//get the document from the internet
|
|
939
|
//Hashtable murlParams = murl.getHashParams();
|
|
940
|
Hashtable murlParams = util.parseQuery(murl.getQuery());
|
|
941
|
if(murlParams.containsKey("httpurl"))
|
|
942
|
{//httpurl is the param name for an http url.
|
|
943
|
URL urlconn = new URL((String)murlParams.get("httpurl"));
|
|
944
|
//create a new url obj.
|
|
945
|
//DataInputStream htmldoc = new DataInputStream(urlconn.openStream());
|
|
946
|
BufferedReader htmldoc = new BufferedReader(
|
|
947
|
new InputStreamReader(urlconn.openStream()));
|
|
948
|
//bind a data stream.
|
|
949
|
try
|
|
950
|
{ //display the document
|
|
951
|
String line=null;
|
|
952
|
while((line = htmldoc.readLine()) != null)
|
|
953
|
{
|
|
954
|
out.println(line);
|
|
955
|
}
|
|
956
|
}
|
|
957
|
catch(Exception e)
|
|
958
|
{
|
|
959
|
System.out.println("error viewing html document from " +
|
|
960
|
"MetacatServlet.handleGetRelatedDocumentAction: " +
|
|
961
|
e.getMessage());
|
|
962
|
}
|
|
963
|
}
|
|
964
|
}
|
|
965
|
}
|
|
966
|
catch (McdbException e) {
|
|
967
|
response.setContentType("text/xml");
|
|
968
|
e.toXml(out);
|
|
969
|
} catch (Throwable t) {
|
|
970
|
response.setContentType("text/html");
|
|
971
|
out.println(t.getMessage());
|
|
972
|
} finally {
|
|
973
|
util.returnConnection(conn);
|
|
974
|
}
|
|
975
|
//} // end if
|
|
976
|
}
|
|
977
|
|
|
978
|
/**
|
|
979
|
* Handle the database read request and return an XML document,
|
|
980
|
* possibly transformed from XML into HTML
|
|
981
|
*/
|
|
982
|
private void handleReadAction(/*PrintWriter out,*/ Hashtable params,
|
|
983
|
HttpServletResponse response, String username)
|
|
984
|
throws ClassNotFoundException, IOException, SQLException
|
|
985
|
{
|
|
986
|
PrintWriter out;
|
|
987
|
try {
|
|
988
|
//MetacatURL murl = new MetacatURL(((String[])params.get("docid"))[0]);
|
|
989
|
if(params.containsKey(new String("qformat")) &&
|
|
990
|
((String[])params.get("qformat"))[0].equals("bin"))
|
|
991
|
{
|
|
992
|
handleGetData(params, response, username);
|
|
993
|
}
|
|
994
|
else
|
|
995
|
{
|
|
996
|
out = response.getWriter();
|
|
997
|
URL murl = new URL(((String[])params.get("docid"))[0]);
|
|
998
|
handleGetRelatedDocumentAction(out, params, response, murl);
|
|
999
|
}
|
|
1000
|
} catch (MalformedURLException mue) {
|
|
1001
|
out = response.getWriter();
|
|
1002
|
handleGetDocumentAction(out, params, response);
|
|
1003
|
}
|
|
1004
|
}
|
|
1005
|
|
|
1006
|
/**
|
|
1007
|
* Handle the read of a data file.
|
|
1008
|
*/
|
|
1009
|
private void handleGetData(Hashtable params,
|
|
1010
|
HttpServletResponse response, String username)
|
|
1011
|
{
|
|
1012
|
String docid = null;
|
|
1013
|
try
|
|
1014
|
{
|
|
1015
|
URL murl = new URL(((String[])params.get("docid"))[0]);
|
|
1016
|
Hashtable murlParams = util.parseQuery(murl.getQuery());
|
|
1017
|
if(murlParams.containsKey("docid"))
|
|
1018
|
{
|
|
1019
|
docid = (String)murlParams.get("docid");
|
|
1020
|
}
|
|
1021
|
}
|
|
1022
|
catch(MalformedURLException mue)
|
|
1023
|
{
|
|
1024
|
docid = ((String[])params.get("docid"))[0];
|
|
1025
|
}
|
|
1026
|
|
|
1027
|
File f = null;
|
|
1028
|
FileInputStream fin = null;
|
|
1029
|
Connection conn;
|
|
1030
|
|
|
1031
|
try
|
|
1032
|
{
|
|
1033
|
StringBuffer sql = new StringBuffer();
|
|
1034
|
sql.append("select docname from xml_documents where docid like '");
|
|
1035
|
sql.append(docid).append("'");
|
|
1036
|
conn = util.openDBConnection();
|
|
1037
|
|
|
1038
|
AccessControlList aclobj = new AccessControlList(conn);
|
|
1039
|
boolean hasPermission = aclobj.hasPermission("READ",username,docid);
|
|
1040
|
|
|
1041
|
if(!hasPermission)
|
|
1042
|
{
|
|
1043
|
response.setContentType("text/html");
|
|
1044
|
PrintWriter out = response.getWriter();
|
|
1045
|
out.println("Error: you do not have permission to view this document");
|
|
1046
|
return;
|
|
1047
|
}
|
|
1048
|
response.setContentType("application/octet-stream");
|
|
1049
|
ServletOutputStream sosout = response.getOutputStream();
|
|
1050
|
PreparedStatement pstmt = conn.prepareStatement(sql.toString());
|
|
1051
|
pstmt.execute();
|
|
1052
|
ResultSet rs = pstmt.getResultSet();
|
|
1053
|
boolean tablehasrows = rs.next();
|
|
1054
|
while(tablehasrows)
|
|
1055
|
{
|
|
1056
|
//get the file stream from the file then send it to the output stream
|
|
1057
|
String filepath = util.getOption("datafilepath");
|
|
1058
|
if(!filepath.endsWith("/"))
|
|
1059
|
{
|
|
1060
|
filepath += "/";
|
|
1061
|
}
|
|
1062
|
f = new File(filepath + rs.getString(1));
|
|
1063
|
fin = new FileInputStream(f);
|
|
1064
|
|
|
1065
|
int b = fin.read();
|
|
1066
|
while(b != -1)
|
|
1067
|
{
|
|
1068
|
sosout.write(b);
|
|
1069
|
b = fin.read();
|
|
1070
|
}
|
|
1071
|
tablehasrows = rs.next();
|
|
1072
|
}
|
|
1073
|
|
|
1074
|
fin.close();
|
|
1075
|
pstmt.close();
|
|
1076
|
conn.close();
|
|
1077
|
}
|
|
1078
|
catch(Exception e)
|
|
1079
|
{
|
|
1080
|
System.out.println("error in MetacatServlet.handleGetData: " +
|
|
1081
|
e.getMessage());
|
|
1082
|
e.printStackTrace(System.out);
|
|
1083
|
}
|
|
1084
|
}
|
|
1085
|
|
|
1086
|
/**
|
|
1087
|
* Handle the database read request and return an XML document,
|
|
1088
|
* possibly transformed from XML into HTML
|
|
1089
|
*/
|
|
1090
|
private void handleGetDocumentAction(PrintWriter out, Hashtable params,
|
|
1091
|
HttpServletResponse response)
|
|
1092
|
throws ClassNotFoundException, IOException, SQLException {
|
|
1093
|
String docidstr = null;
|
|
1094
|
String docid = null;
|
|
1095
|
String doc = null;
|
|
1096
|
Connection conn = null;
|
|
1097
|
|
|
1098
|
try {
|
|
1099
|
// Find the document id number
|
|
1100
|
docidstr = ((String[])params.get("docid"))[0];
|
|
1101
|
docid = docidstr;
|
|
1102
|
|
|
1103
|
conn = util.getConnection();
|
|
1104
|
DocumentImpl xmldoc = new DocumentImpl(conn, docid);
|
|
1105
|
// Get the document indicated from the db
|
|
1106
|
//doc = docreader.readXMLDocument(docid);
|
|
1107
|
|
|
1108
|
// Return the document in XML or HTML format
|
|
1109
|
String qformat=null;
|
|
1110
|
if(params.containsKey("qformat"))
|
|
1111
|
{
|
|
1112
|
qformat = ((String[])params.get("qformat"))[0];
|
|
1113
|
}
|
|
1114
|
else
|
|
1115
|
{
|
|
1116
|
qformat = "html";
|
|
1117
|
}
|
|
1118
|
if (qformat.equals("xml")) {
|
|
1119
|
// set content type and other response header fields first
|
|
1120
|
response.setContentType("text/xml");
|
|
1121
|
xmldoc.toXml(out);
|
|
1122
|
//out.println(xmldoc);
|
|
1123
|
} else if (qformat.equals("html")) {
|
|
1124
|
response.setContentType("text/html");
|
|
1125
|
// Look up the document type
|
|
1126
|
String sourcetype = xmldoc.getDoctype();
|
|
1127
|
// Transform the document to the new doctype
|
|
1128
|
DBTransform dbt = new DBTransform(conn);
|
|
1129
|
dbt.transformXMLDocument(xmldoc.toString(), sourcetype,
|
|
1130
|
"-//W3C//HTML//EN", out);
|
|
1131
|
}
|
|
1132
|
} catch (McdbException e) {
|
|
1133
|
response.setContentType("text/xml");
|
|
1134
|
e.toXml(out);
|
|
1135
|
} catch (Throwable t) {
|
|
1136
|
response.setContentType("text/html");
|
|
1137
|
out.println(t.getMessage());
|
|
1138
|
} finally {
|
|
1139
|
util.returnConnection(conn);
|
|
1140
|
}
|
|
1141
|
|
|
1142
|
}
|
|
1143
|
|
|
1144
|
/**
|
|
1145
|
* Handle the database putdocument request and write an XML document
|
|
1146
|
* to the database connection
|
|
1147
|
*/
|
|
1148
|
private void handleInsertOrUpdateAction(PrintWriter out, Hashtable params,
|
|
1149
|
HttpServletResponse response, String user, String group) {
|
|
1150
|
|
|
1151
|
Connection conn = null;
|
|
1152
|
|
|
1153
|
try {
|
|
1154
|
// Get the document indicated
|
|
1155
|
String[] doctext = (String[])params.get("doctext");
|
|
1156
|
|
|
1157
|
String pub = null;
|
|
1158
|
if (params.containsKey("public")) {
|
|
1159
|
pub = ((String[])params.get("public"))[0];
|
|
1160
|
}
|
|
1161
|
|
|
1162
|
StringReader dtd = null;
|
|
1163
|
if (params.containsKey("dtdtext")) {
|
|
1164
|
String[] dtdtext = (String[])params.get("dtdtext");
|
|
1165
|
try {
|
|
1166
|
if ( !dtdtext[0].equals("") ) {
|
|
1167
|
dtd = new StringReader(dtdtext[0]);
|
|
1168
|
}
|
|
1169
|
} catch (NullPointerException npe) {}
|
|
1170
|
}
|
|
1171
|
|
|
1172
|
StringReader xml = null;
|
|
1173
|
boolean validate = false;
|
|
1174
|
try {
|
|
1175
|
// look inside XML Document for <!DOCTYPE ... PUBLIC/SYSTEM ... >
|
|
1176
|
// in order to decide whether to use validation parser
|
|
1177
|
validate = validateXML(doctext[0]);
|
|
1178
|
xml = new StringReader(doctext[0]);
|
|
1179
|
|
|
1180
|
String[] action = (String[])params.get("action");
|
|
1181
|
String[] docid = (String[])params.get("docid");
|
|
1182
|
String newdocid = null;
|
|
1183
|
|
|
1184
|
String doAction = null;
|
|
1185
|
if (action[0].equals("insert")) {
|
|
1186
|
doAction = "INSERT";
|
|
1187
|
} else if (action[0].equals("update")) {
|
|
1188
|
doAction = "UPDATE";
|
|
1189
|
}
|
|
1190
|
|
|
1191
|
try {
|
|
1192
|
// get a connection from the pool
|
|
1193
|
conn = util.getConnection();
|
|
1194
|
|
|
1195
|
// write the document to the database
|
|
1196
|
try {
|
|
1197
|
String accNumber = docid[0];
|
|
1198
|
if (accNumber.equals("")) {
|
|
1199
|
accNumber = null;
|
|
1200
|
}
|
|
1201
|
newdocid = DocumentImpl.write(conn, xml, pub, dtd, doAction,
|
|
1202
|
accNumber, user, group, validate);
|
|
1203
|
} catch (NullPointerException npe) {
|
|
1204
|
newdocid = DocumentImpl.write(conn, xml, pub, dtd, doAction,
|
|
1205
|
null, user, group, validate);
|
|
1206
|
}
|
|
1207
|
} finally {
|
|
1208
|
util.returnConnection(conn);
|
|
1209
|
}
|
|
1210
|
|
|
1211
|
// set content type and other response header fields first
|
|
1212
|
response.setContentType("text/xml");
|
|
1213
|
out.println("<?xml version=\"1.0\"?>");
|
|
1214
|
out.println("<success>");
|
|
1215
|
out.println("<docid>" + newdocid + "</docid>");
|
|
1216
|
out.println("</success>");
|
|
1217
|
|
|
1218
|
} catch (NullPointerException npe) {
|
|
1219
|
response.setContentType("text/xml");
|
|
1220
|
out.println("<?xml version=\"1.0\"?>");
|
|
1221
|
out.println("<error>");
|
|
1222
|
out.println(npe.getMessage());
|
|
1223
|
out.println("</error>");
|
|
1224
|
}
|
|
1225
|
} catch (Exception e) {
|
|
1226
|
response.setContentType("text/xml");
|
|
1227
|
out.println("<?xml version=\"1.0\"?>");
|
|
1228
|
out.println("<error>");
|
|
1229
|
out.println(e.getMessage());
|
|
1230
|
if (e instanceof SAXException) {
|
|
1231
|
Exception e2 = ((SAXException)e).getException();
|
|
1232
|
out.println("<error>");
|
|
1233
|
out.println(e2.getMessage());
|
|
1234
|
out.println("</error>");
|
|
1235
|
}
|
|
1236
|
//e.printStackTrace(out);
|
|
1237
|
out.println("</error>");
|
|
1238
|
}
|
|
1239
|
}
|
|
1240
|
|
|
1241
|
/**
|
|
1242
|
* Parse XML Document to look for <!DOCTYPE ... PUBLIC/SYSTEM ... >
|
|
1243
|
* in order to decide whether to use validation parser
|
|
1244
|
*/
|
|
1245
|
private static boolean validateXML(String xmltext) throws IOException {
|
|
1246
|
|
|
1247
|
StringReader xmlreader = new StringReader(xmltext);
|
|
1248
|
StringBuffer cbuff = new StringBuffer();
|
|
1249
|
java.util.Stack st = new java.util.Stack();
|
|
1250
|
boolean validate = false;
|
|
1251
|
int c;
|
|
1252
|
int inx;
|
|
1253
|
|
|
1254
|
// read from the stream until find the keywords
|
|
1255
|
while ( (st.empty() || st.size()<4) && ((c = xmlreader.read()) != -1) ) {
|
|
1256
|
cbuff.append((char)c);
|
|
1257
|
|
|
1258
|
// "<!DOCTYPE" keyword is found; put it in the stack
|
|
1259
|
if ( (inx = cbuff.toString().indexOf("<!DOCTYPE")) != -1 ) {
|
|
1260
|
cbuff = new StringBuffer();
|
|
1261
|
st.push("<!DOCTYPE");
|
|
1262
|
}
|
|
1263
|
// "PUBLIC" keyword is found; put it in the stack
|
|
1264
|
if ( (inx = cbuff.toString().indexOf("PUBLIC")) != -1 ) {
|
|
1265
|
cbuff = new StringBuffer();
|
|
1266
|
st.push("PUBLIC");
|
|
1267
|
}
|
|
1268
|
// "SYSTEM" keyword is found; put it in the stack
|
|
1269
|
if ( (inx = cbuff.toString().indexOf("SYSTEM")) != -1 ) {
|
|
1270
|
cbuff = new StringBuffer();
|
|
1271
|
st.push("SYSTEM");
|
|
1272
|
}
|
|
1273
|
// ">" character is found; put it in the stack
|
|
1274
|
// ">" is found twice: fisrt from <?xml ...?>
|
|
1275
|
// and second from <!DOCTYPE ... >
|
|
1276
|
if ( (inx = cbuff.toString().indexOf(">")) != -1 ) {
|
|
1277
|
cbuff = new StringBuffer();
|
|
1278
|
st.push(">");
|
|
1279
|
}
|
|
1280
|
}
|
|
1281
|
|
|
1282
|
// close the stream
|
|
1283
|
xmlreader.close();
|
|
1284
|
|
|
1285
|
// check the stack whether it contains the keywords:
|
|
1286
|
// "<!DOCTYPE", "PUBLIC" or "SYSTEM", and ">" in this order
|
|
1287
|
if ( st.size() == 4 ) {
|
|
1288
|
if ( ((String)st.pop()).equals(">") &&
|
|
1289
|
( ((String)st.peek()).equals("PUBLIC") |
|
|
1290
|
((String)st.pop()).equals("SYSTEM") ) &&
|
|
1291
|
((String)st.pop()).equals("<!DOCTYPE") ) {
|
|
1292
|
validate = true;
|
|
1293
|
}
|
|
1294
|
}
|
|
1295
|
|
|
1296
|
System.out.println("Validation is " + validate);
|
|
1297
|
return validate;
|
|
1298
|
}
|
|
1299
|
|
|
1300
|
/**
|
|
1301
|
* Handle the database delete request and delete an XML document
|
|
1302
|
* from the database connection
|
|
1303
|
*/
|
|
1304
|
private void handleDeleteAction(PrintWriter out, Hashtable params,
|
|
1305
|
HttpServletResponse response, String user, String group) {
|
|
1306
|
|
|
1307
|
String[] docid = (String[])params.get("docid");
|
|
1308
|
Connection conn = null;
|
|
1309
|
|
|
1310
|
// delete the document from the database
|
|
1311
|
try {
|
|
1312
|
// get a connection from the pool
|
|
1313
|
conn = util.getConnection();
|
|
1314
|
// NOTE -- NEED TO TEST HERE
|
|
1315
|
// FOR EXISTENCE OF DOCID PARAM
|
|
1316
|
// BEFORE ACCESSING ARRAY
|
|
1317
|
try {
|
|
1318
|
DocumentImpl.delete(conn, docid[0], user, group);
|
|
1319
|
response.setContentType("text/xml");
|
|
1320
|
out.println("<?xml version=\"1.0\"?>");
|
|
1321
|
out.println("<success>");
|
|
1322
|
out.println("Document deleted.");
|
|
1323
|
out.println("</success>");
|
|
1324
|
} catch (AccessionNumberException ane) {
|
|
1325
|
response.setContentType("text/xml");
|
|
1326
|
out.println("<?xml version=\"1.0\"?>");
|
|
1327
|
out.println("<error>");
|
|
1328
|
out.println("Error deleting document!!!");
|
|
1329
|
out.println(ane.getMessage());
|
|
1330
|
out.println("</error>");
|
|
1331
|
}
|
|
1332
|
} catch (Exception e) {
|
|
1333
|
response.setContentType("text/xml");
|
|
1334
|
out.println("<?xml version=\"1.0\"?>");
|
|
1335
|
out.println("<error>");
|
|
1336
|
out.println(e.getMessage());
|
|
1337
|
out.println("</error>");
|
|
1338
|
} finally {
|
|
1339
|
util.returnConnection(conn);
|
|
1340
|
}
|
|
1341
|
}
|
|
1342
|
|
|
1343
|
/**
|
|
1344
|
* Handle the validation request and return the results to the requestor
|
|
1345
|
*/
|
|
1346
|
private void handleValidateAction(PrintWriter out, Hashtable params,
|
|
1347
|
HttpServletResponse response) {
|
|
1348
|
|
|
1349
|
// Get the document indicated
|
|
1350
|
String valtext = null;
|
|
1351
|
|
|
1352
|
try {
|
|
1353
|
valtext = ((String[])params.get("valtext"))[0];
|
|
1354
|
} catch (Exception nullpe) {
|
|
1355
|
|
|
1356
|
Connection conn = null;
|
|
1357
|
String docid = null;
|
|
1358
|
try {
|
|
1359
|
// Find the document id number
|
|
1360
|
docid = ((String[])params.get("docid"))[0];
|
|
1361
|
|
|
1362
|
// get a connection from the pool
|
|
1363
|
conn = util.getConnection();
|
|
1364
|
|
|
1365
|
// Get the document indicated from the db
|
|
1366
|
DocumentImpl xmldoc = new DocumentImpl(conn, docid);
|
|
1367
|
valtext = xmldoc.toString();
|
|
1368
|
|
|
1369
|
} catch (NullPointerException npe) {
|
|
1370
|
response.setContentType("text/xml");
|
|
1371
|
out.println("<error>Error getting document ID: " + docid + "</error>");
|
|
1372
|
if ( conn != null ) { util.returnConnection(conn); }
|
|
1373
|
return;
|
|
1374
|
} catch (Exception e) {
|
|
1375
|
response.setContentType("text/html");
|
|
1376
|
out.println(e.getMessage());
|
|
1377
|
} finally {
|
|
1378
|
util.returnConnection(conn);
|
|
1379
|
}
|
|
1380
|
}
|
|
1381
|
|
|
1382
|
Connection conn = null;
|
|
1383
|
try {
|
|
1384
|
// get a connection from the pool
|
|
1385
|
conn = util.getConnection();
|
|
1386
|
DBValidate valobj = new DBValidate(saxparser,conn);
|
|
1387
|
boolean valid = valobj.validateString(valtext);
|
|
1388
|
|
|
1389
|
// set content type and other response header fields first
|
|
1390
|
response.setContentType("text/xml");
|
|
1391
|
out.println(valobj.returnErrors());
|
|
1392
|
|
|
1393
|
} catch (NullPointerException npe2) {
|
|
1394
|
// set content type and other response header fields first
|
|
1395
|
response.setContentType("text/xml");
|
|
1396
|
out.println("<error>Error validating document.</error>");
|
|
1397
|
} catch (Exception e) {
|
|
1398
|
response.setContentType("text/html");
|
|
1399
|
out.println(e.getMessage());
|
|
1400
|
} finally {
|
|
1401
|
util.returnConnection(conn);
|
|
1402
|
}
|
|
1403
|
}
|
|
1404
|
|
|
1405
|
/**
|
|
1406
|
* Handle the document request and return the results to the requestor
|
|
1407
|
* If a docid is passed in through the params then that document
|
|
1408
|
* will be retrieved form the DB and put in the zip file.
|
|
1409
|
* In addition if 1 or more relations parameters are passed, those file
|
|
1410
|
* will be zipped as well. Currently this is only implemented for
|
|
1411
|
* metacat:// and http:// files. Support should be added for srb:// files
|
|
1412
|
* as well.
|
|
1413
|
*/
|
|
1414
|
private void handleGetDataDocumentAction(ServletOutputStream out,
|
|
1415
|
Hashtable params,
|
|
1416
|
HttpServletResponse response) {
|
|
1417
|
//find the related files, get them from their source and zip them into
|
|
1418
|
//a zip file.
|
|
1419
|
try
|
|
1420
|
{
|
|
1421
|
Connection conn = util.getConnection();
|
|
1422
|
String currentDocid = ((String[])params.get("docid"))[0];
|
|
1423
|
ZipOutputStream zout = new ZipOutputStream(out);
|
|
1424
|
byte[] bytestring = null;
|
|
1425
|
ZipEntry zentry = null;
|
|
1426
|
DocumentImpl xmldoc = null;
|
|
1427
|
String[] reldocs = null;
|
|
1428
|
|
|
1429
|
if(params.containsKey("relation"))
|
|
1430
|
{ //get the relations from the parameters.
|
|
1431
|
reldocs = ((String[])params.get("relation"));
|
|
1432
|
}
|
|
1433
|
else
|
|
1434
|
{ //let the for loop know that there are no relations to zip
|
|
1435
|
reldocs = new String[0];
|
|
1436
|
}
|
|
1437
|
|
|
1438
|
//write the base file to the zip file.
|
|
1439
|
xmldoc = new DocumentImpl(conn, currentDocid);
|
|
1440
|
bytestring = (xmldoc.toString()).getBytes();
|
|
1441
|
zentry = new ZipEntry(currentDocid + ".xml");
|
|
1442
|
//create a new zip entry and write the file to the stream
|
|
1443
|
zentry.setSize(bytestring.length);
|
|
1444
|
zout.putNextEntry(zentry);
|
|
1445
|
zout.write(bytestring, 0, bytestring.length);
|
|
1446
|
zout.closeEntry(); //get ready for the next entry.
|
|
1447
|
|
|
1448
|
//zip up the related documents
|
|
1449
|
for(int i=0; i<reldocs.length; i++)
|
|
1450
|
{
|
|
1451
|
//MetacatURL murl = new MetacatURL(((String)reldocs[i]));
|
|
1452
|
URL murl = new URL(((String)reldocs[i]));
|
|
1453
|
Hashtable qparams = util.parseQuery(murl.getQuery());
|
|
1454
|
if(murl.getProtocol().equals("metacat"))
|
|
1455
|
{
|
|
1456
|
//get the document from the database
|
|
1457
|
//xmldoc = new DocumentImpl(conn, (String)murl.getHashParam("docid"));
|
|
1458
|
xmldoc = new DocumentImpl(conn, (String)qparams.get("docid"));
|
|
1459
|
bytestring = (xmldoc.toString()).getBytes();
|
|
1460
|
zentry = new ZipEntry(qparams.get("docid") + ".xml");
|
|
1461
|
//create a new zip entry and write the file to the stream
|
|
1462
|
zentry.setSize(bytestring.length);
|
|
1463
|
zout.putNextEntry(zentry);
|
|
1464
|
zout.write(bytestring, 0, bytestring.length);
|
|
1465
|
zout.closeEntry(); //get ready for the next entry.
|
|
1466
|
}
|
|
1467
|
else if(murl.getProtocol().equals("http"))
|
|
1468
|
{
|
|
1469
|
//Hashtable murlParams = murl.getHashParams();
|
|
1470
|
if(qparams.containsKey("httpurl"))
|
|
1471
|
{//httpurl is the param name for an http url.
|
|
1472
|
URL urlconn = new URL((String)qparams.get("httpurl"));
|
|
1473
|
//create a new url obj.
|
|
1474
|
BufferedReader htmldoc = new BufferedReader(
|
|
1475
|
new InputStreamReader(urlconn.openStream()));
|
|
1476
|
//get the data from the web server
|
|
1477
|
try
|
|
1478
|
{ //zip the document
|
|
1479
|
String line=null;
|
|
1480
|
zentry = new ZipEntry((String)qparams.get("filename"));
|
|
1481
|
//get just the filename from the URL.
|
|
1482
|
zout.putNextEntry(zentry);
|
|
1483
|
//make a new entry in the zip file stream
|
|
1484
|
while((line = htmldoc.readLine()) != null)
|
|
1485
|
{
|
|
1486
|
bytestring = (line.toString()).getBytes();
|
|
1487
|
zout.write(bytestring, 0, bytestring.length);
|
|
1488
|
//write out the file line by line
|
|
1489
|
}
|
|
1490
|
zout.closeEntry(); //close the entry in the file
|
|
1491
|
}
|
|
1492
|
catch(Exception e)
|
|
1493
|
{
|
|
1494
|
System.out.println("error downloading html document "+
|
|
1495
|
"in metacatServlet.handleGetDataDocumentAction");
|
|
1496
|
}
|
|
1497
|
}
|
|
1498
|
}
|
|
1499
|
}
|
|
1500
|
zout.finish(); //terminate the zip file
|
|
1501
|
zout.close(); //close the stream.
|
|
1502
|
util.returnConnection(conn); //return the connection to the pool
|
|
1503
|
}
|
|
1504
|
catch(Exception e)
|
|
1505
|
{
|
|
1506
|
System.out.println("Error creating zip file from " +
|
|
1507
|
"MetacatServlet.handleGetDataDocumentAction: " +
|
|
1508
|
e.getMessage());
|
|
1509
|
e.printStackTrace(System.out);
|
|
1510
|
}
|
|
1511
|
|
|
1512
|
/*
|
|
1513
|
//////////old code using a shell script/////////////////////////////////
|
|
1514
|
|
|
1515
|
boolean error_flag = false;
|
|
1516
|
String error_message = "";
|
|
1517
|
// Get the document indicated
|
|
1518
|
String[] datadoc = (String[])params.get("datadoc");
|
|
1519
|
// defaultdatapath = "C:\\Temp\\"; // for testing only!!!
|
|
1520
|
// executescript = "test.bat"; // for testing only!!!
|
|
1521
|
|
|
1522
|
// set content type and other response header fields first
|
|
1523
|
response.setContentType("application/octet-stream");
|
|
1524
|
if (defaultdatapath!=null) {
|
|
1525
|
if(!defaultdatapath.endsWith(System.getProperty("file.separator"))) {
|
|
1526
|
defaultdatapath=defaultdatapath+System.getProperty("file.separator");
|
|
1527
|
}
|
|
1528
|
System.out.println("Path= "+defaultdatapath+datadoc[0]);
|
|
1529
|
if (executescript!=null) {
|
|
1530
|
String command = null;
|
|
1531
|
File scriptfile = new File(executescript);
|
|
1532
|
if (scriptfile.exists()) {
|
|
1533
|
command=executescript+" "+datadoc[0]; // script includes path
|
|
1534
|
} else { // look in defaultdatapath
|
|
1535
|
// on Win98 one MUST include the .bat extender
|
|
1536
|
command = defaultdatapath+executescript+" "+datadoc[0];
|
|
1537
|
}
|
|
1538
|
System.out.println(command);
|
|
1539
|
try {
|
|
1540
|
Process proc = Runtime.getRuntime().exec(command);
|
|
1541
|
proc.waitFor();
|
|
1542
|
}
|
|
1543
|
catch (Exception eee) {
|
|
1544
|
System.out.println("Error running process!");
|
|
1545
|
error_flag = true;
|
|
1546
|
error_message = "Error running process!";}
|
|
1547
|
} // end executescript not null if
|
|
1548
|
File datafile = new File(defaultdatapath+datadoc[0]);
|
|
1549
|
try {
|
|
1550
|
FileInputStream fw = new FileInputStream(datafile);
|
|
1551
|
int x;
|
|
1552
|
while ((x = fw.read())!=-1) {
|
|
1553
|
out.write(x); }
|
|
1554
|
fw.close();
|
|
1555
|
} catch (Exception e) {
|
|
1556
|
System.out.println("Error in returning file\n"+e.getMessage());
|
|
1557
|
error_flag=true;
|
|
1558
|
error_message = error_message+"\nError in returning file\n"+
|
|
1559
|
e.getMessage();
|
|
1560
|
}
|
|
1561
|
} // end defaultdatapath not null if
|
|
1562
|
*/
|
|
1563
|
}
|
|
1564
|
|
|
1565
|
/**
|
|
1566
|
* Handle "getaccesscontrol" action.
|
|
1567
|
* Read Access Control List from db connection in XML format
|
|
1568
|
*/
|
|
1569
|
private void handleGetAccessControlAction(PrintWriter out, Hashtable params,
|
|
1570
|
HttpServletResponse response,
|
|
1571
|
String username, String groupname) {
|
|
1572
|
|
|
1573
|
Connection conn = null;
|
|
1574
|
String docid = ((String[])params.get("docid"))[0];
|
|
1575
|
|
|
1576
|
try {
|
|
1577
|
|
|
1578
|
// get connection from the pool
|
|
1579
|
conn = util.getConnection();
|
|
1580
|
AccessControlList aclobj = new AccessControlList(conn);
|
|
1581
|
String acltext = aclobj.getACL(docid, username, groupname);
|
|
1582
|
out.println(acltext);
|
|
1583
|
|
|
1584
|
} catch (Exception e) {
|
|
1585
|
out.println("<?xml version=\"1.0\"?>");
|
|
1586
|
out.println("<error>");
|
|
1587
|
out.println(e.getMessage());
|
|
1588
|
out.println("</error>");
|
|
1589
|
} finally {
|
|
1590
|
util.returnConnection(conn);
|
|
1591
|
}
|
|
1592
|
|
|
1593
|
}
|
|
1594
|
|
|
1595
|
/**
|
|
1596
|
* Handle "getdoctypes" action.
|
|
1597
|
* Read all doctypes from db connection in XML format
|
|
1598
|
*/
|
|
1599
|
private void handleGetDoctypesAction(PrintWriter out, Hashtable params,
|
|
1600
|
HttpServletResponse response) {
|
|
1601
|
|
|
1602
|
Connection conn = null;
|
|
1603
|
|
|
1604
|
try {
|
|
1605
|
|
|
1606
|
// get connection from the pool
|
|
1607
|
conn = util.getConnection();
|
|
1608
|
DBUtil dbutil = new DBUtil(conn);
|
|
1609
|
String doctypes = dbutil.readDoctypes();
|
|
1610
|
out.println(doctypes);
|
|
1611
|
|
|
1612
|
} catch (Exception e) {
|
|
1613
|
out.println("<?xml version=\"1.0\"?>");
|
|
1614
|
out.println("<error>");
|
|
1615
|
out.println(e.getMessage());
|
|
1616
|
out.println("</error>");
|
|
1617
|
} finally {
|
|
1618
|
util.returnConnection(conn);
|
|
1619
|
}
|
|
1620
|
|
|
1621
|
}
|
|
1622
|
|
|
1623
|
/**
|
|
1624
|
* Handle the "getdataguide" action.
|
|
1625
|
* Read Data Guide for a given doctype from db connection in XML format
|
|
1626
|
*/
|
|
1627
|
private void handleGetDataGuideAction(PrintWriter out, Hashtable params,
|
|
1628
|
HttpServletResponse response) {
|
|
1629
|
|
|
1630
|
Connection conn = null;
|
|
1631
|
String doctype = null;
|
|
1632
|
String[] doctypeArr = (String[])params.get("doctype");
|
|
1633
|
|
|
1634
|
// get only the first doctype specified in the list of doctypes
|
|
1635
|
// it could be done for all doctypes in that list
|
|
1636
|
if (doctypeArr != null) {
|
|
1637
|
doctype = ((String[])params.get("doctype"))[0];
|
|
1638
|
}
|
|
1639
|
|
|
1640
|
try {
|
|
1641
|
|
|
1642
|
// get connection from the pool
|
|
1643
|
conn = util.getConnection();
|
|
1644
|
DBUtil dbutil = new DBUtil(conn);
|
|
1645
|
String dataguide = dbutil.readDataGuide(doctype);
|
|
1646
|
out.println(dataguide);
|
|
1647
|
|
|
1648
|
} catch (Exception e) {
|
|
1649
|
out.println("<?xml version=\"1.0\"?>");
|
|
1650
|
out.println("<error>");
|
|
1651
|
out.println(e.getMessage());
|
|
1652
|
out.println("</error>");
|
|
1653
|
} finally {
|
|
1654
|
util.returnConnection(conn);
|
|
1655
|
}
|
|
1656
|
|
|
1657
|
}
|
|
1658
|
|
|
1659
|
}
|