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/**
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* '$RCSfile$'
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* Purpose: A Class that implements administrative methods
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* Copyright: 2008 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Michael Daigle
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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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.util;
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5914
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leinfelder
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import java.io.InputStream;
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import java.io.InputStreamReader;
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daigle
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import java.io.IOException;
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daigle
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import java.io.BufferedReader;
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import java.io.PrintWriter;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLConnection;
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5914
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leinfelder
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import java.util.ArrayList;
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daigle
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Hashtable;
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leinfelder
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import java.util.Iterator;
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import java.util.List;
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import java.util.Set;
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daigle
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import java.util.Vector;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.http.Cookie;
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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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daigle
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leinfelder
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import org.apache.commons.io.IOUtils;
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import org.apache.http.HttpException;
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import org.apache.http.HttpResponse;
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import org.apache.http.HttpVersion;
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import org.apache.http.NameValuePair;
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import org.apache.http.client.HttpClient;
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import org.apache.http.client.entity.UrlEncodedFormEntity;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.impl.client.DefaultHttpClient;
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import org.apache.http.message.BasicNameValuePair;
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import org.apache.http.params.CoreProtocolPNames;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.metacat.service.SessionService;
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import edu.ucsb.nceas.metacat.shared.MetacatUtilException;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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public class RequestUtil {
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private static Logger logMetacat = Logger.getLogger(RequestUtil.class);
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private static String encoding = "UTF-8";
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daigle
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/**
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* private constructor - all methods are static so there is no
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* no need to instantiate.
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*/
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private RequestUtil() {}
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/**
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* Forward a request that was received by this servlet on to another JSP
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* page or servlet to continue handling the request.
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*
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* @param request
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* to be forwarded
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* @param response
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* that can be used for writing output to the client
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* @param destination
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* the context-relative URL to which the request is forwarded
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* @param params the request parameters. these will be added to the request
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*/
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public static void forwardRequest(HttpServletRequest request, HttpServletResponse response,
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String destinationUrl, Hashtable<String, String[]> params) throws MetacatUtilException {
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destinationUrl += "?" + paramsToQuery(params);
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logMetacat.debug("Forwarding request to " + destinationUrl);
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ServletContext servletContext = request.getSession()
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.getServletContext();
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try {
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servletContext.getRequestDispatcher(destinationUrl).forward(request, response);
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} catch (IOException ioe) {
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throw new MetacatUtilException("RequestUtil.forwardRequest - I/O error when forwarding to " +
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destinationUrl + " : " + ioe.getMessage());
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} catch (ServletException se) {
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throw new MetacatUtilException("RequestUtil.forwardRequest - Servlet error when forwarding to " +
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destinationUrl + " : " + se.getMessage());
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}
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}
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/**
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* Forward a request that was received by this servlet on to another JSP
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* page or servlet to continue handling the request. In this case, the page
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* must be referenced in a paramter named "forwardto". If the qformat is
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* provided, the file will be retrieved from that skin. Otherwise, the file
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* will be retrieved from the system default skin.
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*
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* For more specific file location, use: forwardRequest(request,response, destinationUrl, params)
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*
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* @param request
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* to be forwarded
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* @param response
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* that can be used for writing output to the client
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* @param params
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* the request parameters. these will be added to the request.
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*/
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public static void forwardRequest(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params) throws MetacatUtilException {
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String forwardTos[] = params.get("forwardto");
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if (forwardTos == null || forwardTos[0].equals("")) {
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throw new MetacatUtilException("RequestUtil.forwardRequest - forwardto must be set in parameters when forwarding.");
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}
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String forwardTo = forwardTos[0];
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String qformat = null;
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String qformats[] = params.get("qformat");
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if (qformats == null || qformats.length == 0) {
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try {
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qformat = PropertyService.getProperty("application.default-style");
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} catch (PropertyNotFoundException pnfe) {
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qformat = "default";
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logMetacat.warn("RequestUtil.forwardRequest - could not get property " +
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"'application.default-style'. Using 'default'");
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}
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} else {
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qformat = qformats[0];
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}
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String destinationUrl = "/style/skins/" + qformat + "/" + forwardTo;
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destinationUrl += "?" + paramsToQuery(params);
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logMetacat.debug("RequestUtil.forwardRequest - Forwarding request to " + destinationUrl);
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ServletContext servletContext = request.getSession()
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.getServletContext();
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try {
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servletContext.getRequestDispatcher(destinationUrl).forward(request, response);
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} catch (IOException ioe) {
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throw new MetacatUtilException("RequestUtil.forwardRequest - I/O error when forwarding to " +
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destinationUrl + " : " + ioe.getMessage());
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} catch (ServletException se) {
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throw new MetacatUtilException("RequestUtil.forwardRequest - Servlet error when forwarding to " +
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destinationUrl + " : " + se.getMessage());
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}
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}
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4201
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daigle
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/**
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* Post a request and return the response body
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*
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* @param httpClient
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* The HttpClient to use in the post. This is passed in because
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* the same client may be used in several posts
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* @param url
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* the url to post to
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* @param paramMap
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* map of parameters to add to the post
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* @returns a string holding the response body
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*/
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185 |
5914
|
leinfelder
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public static String post(HttpClient httpclient, String url,
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4201
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daigle
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HashMap<String, String> paramMap) throws IOException, HttpException {
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187 |
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5914
|
leinfelder
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httpclient.getParams().setParameter(
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CoreProtocolPNames.PROTOCOL_VERSION,
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HttpVersion.HTTP_1_1);
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httpclient.getParams().setParameter(
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CoreProtocolPNames.HTTP_CONTENT_CHARSET,
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encoding );
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HttpPost post = new HttpPost(url);
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//set the params
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List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
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197 |
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Iterator<String> keys = paramMap.keySet().iterator();
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198 |
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while (keys.hasNext()) {
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199 |
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String key = keys.next();
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200 |
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String value = paramMap.get(key);
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NameValuePair nvp = new BasicNameValuePair(key, value);
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202 |
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nameValuePairs.add(nvp);
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203 |
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}
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204 |
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post.setEntity(new UrlEncodedFormEntity(nameValuePairs, encoding));
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205 |
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//post.setHeader("Cookie", "JSESSIONID="+ sessionId);
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206 |
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HttpResponse httpResponse = httpclient.execute(post);
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207 |
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if (httpResponse.getStatusLine().getStatusCode() != -1) {
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208 |
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InputStream result = httpResponse.getEntity().getContent();
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209 |
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String contents = IOUtils.toString(result, encoding);
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210 |
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return contents;
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}
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4201
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return null;
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}
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216 |
5027
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daigle
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public static String get(String urlString, Hashtable<String, String[]> params) throws MetacatUtilException {
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217 |
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try {
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218 |
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URL url = new URL(urlString);
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219 |
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URLConnection urlConn = url.openConnection();
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220 |
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urlConn.setDoOutput(true);
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222 |
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PrintWriter pw = new PrintWriter(urlConn.getOutputStream());
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224 |
5043
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daigle
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String queryString = paramsToQuery(params);
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logMetacat.debug("Sending get request: " + urlString + "?" + queryString);
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pw.print(queryString);
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227 |
5027
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daigle
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pw.close();
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// get the input from the request
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BufferedReader in =
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new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
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232 |
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StringBuffer sb = new StringBuffer();
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String line;
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235 |
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while ((line = in.readLine()) != null) {
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sb.append(line);
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}
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in.close();
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return sb.toString();
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241 |
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} catch (MalformedURLException mue) {
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242 |
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throw new MetacatUtilException("URL error when contacting: " + urlString + " : " + mue.getMessage());
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243 |
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} catch (IOException ioe) {
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244 |
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throw new MetacatUtilException("I/O error when contacting: " + urlString + " : " + ioe.getMessage());
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245 |
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}
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246 |
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}
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247 |
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248 |
4299
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daigle
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/**
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249 |
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* Get a cookie from a request by the cookie name
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250 |
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*
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251 |
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* @param request
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252 |
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* the request from which to get the cookie
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253 |
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* @param cookieName
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* the name of the cookie to look for
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255 |
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*/
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256 |
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public static Cookie getCookie(HttpServletRequest request, String cookieName) {
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257 |
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Cookie sessionCookies[] = request.getCookies();
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258 |
4201
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daigle
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259 |
4299
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if (sessionCookies == null) {
|
260 |
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return null;
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261 |
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}
|
262 |
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|
263 |
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for (int i = 0; i < sessionCookies.length; i++) {
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264 |
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if(sessionCookies[i].getName().equals(cookieName)) {
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265 |
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return sessionCookies[i];
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266 |
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}
|
267 |
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}
|
268 |
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269 |
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return null;
|
270 |
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}
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271 |
4080
|
daigle
|
|
272 |
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/**
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273 |
4299
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daigle
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* Get the session data from a request. The Scenarios we can run across
|
274 |
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* here:
|
275 |
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* -- the session id parameter was set in the request parameters
|
276 |
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* -- request.getSession returns a new session. There is a chance that the
|
277 |
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* session id was set in a cookie. Check for a JSESSIONID cookie and use
|
278 |
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* that id if provided.
|
279 |
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* -- request.getSession returns a session that is a)
|
280 |
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* preexisting or b) new but without a JSESSIONID cookie. Use the session id
|
281 |
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* from this session
|
282 |
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*
|
283 |
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* @param request
|
284 |
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* the request from which to get the session data
|
285 |
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* @return the session data object representing the active session for this
|
286 |
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* request. If there is no active session, the public session data
|
287 |
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* is returned
|
288 |
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*/
|
289 |
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public static SessionData getSessionData(HttpServletRequest request) {
|
290 |
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SessionData sessionData = null;
|
291 |
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String sessionId = null;
|
292 |
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|
293 |
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Hashtable<String, String[]> params = getParameters(request);
|
294 |
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|
295 |
|
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if (params.containsKey("sessionid")) {
|
296 |
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// the session id is specified in the request parameters
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297 |
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sessionId = ((String[]) params.get("sessionid"))[0];
|
298 |
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logMetacat.debug("session ID provided in request properties: " + sessionId);
|
299 |
|
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} else {
|
300 |
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HttpSession session = request.getSession(true);
|
301 |
|
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if (session.isNew()) {
|
302 |
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// this is a new session
|
303 |
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Cookie sessionCookie = RequestUtil.getCookie(request, "JSESSIONID");
|
304 |
|
|
if (sessionCookie != null) {
|
305 |
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// and there is a JSESSIONID cookie
|
306 |
|
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sessionId = sessionCookie.getValue();
|
307 |
|
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logMetacat.debug("session ID provided in request cookie: "
|
308 |
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+ sessionId);
|
309 |
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}
|
310 |
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}
|
311 |
|
|
if (sessionId == null) {
|
312 |
|
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// there is an existing session (session is old)
|
313 |
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sessionId = session.getId();
|
314 |
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logMetacat.debug("session ID retrieved from request: " + sessionId);
|
315 |
|
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}
|
316 |
|
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}
|
317 |
|
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|
318 |
|
|
// if the session id is registered in SessionService, get the
|
319 |
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|
// SessionData for it. Otherwise, use the public session.
|
320 |
5374
|
berkley
|
if (SessionService.getInstance().isSessionRegistered(sessionId)) {
|
321 |
4299
|
daigle
|
logMetacat.debug("retrieving session data from session service "
|
322 |
|
|
+ "for session id " + sessionId);
|
323 |
5374
|
berkley
|
sessionData = SessionService.getInstance().getRegisteredSession(sessionId);
|
324 |
4299
|
daigle
|
} else {
|
325 |
|
|
logMetacat.debug("using public session. Given session id is "
|
326 |
|
|
+ "registered: " + sessionId);
|
327 |
5374
|
berkley
|
sessionData = SessionService.getInstance().getPublicSession();
|
328 |
4299
|
daigle
|
}
|
329 |
|
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|
330 |
|
|
return sessionData;
|
331 |
|
|
}
|
332 |
|
|
|
333 |
|
|
/**
|
334 |
|
|
* Get a cookie from a request by the cookie name
|
335 |
|
|
*
|
336 |
|
|
* @param request
|
337 |
|
|
* the request from which to get the cookie
|
338 |
|
|
* @param cookieName
|
339 |
|
|
* the name of the cookie to look for
|
340 |
|
|
*/
|
341 |
5076
|
daigle
|
@SuppressWarnings("unchecked")
|
342 |
4299
|
daigle
|
public static Hashtable<String, String[]> getParameters(HttpServletRequest request) {
|
343 |
|
|
Hashtable<String, String[]> params = new Hashtable<String, String[]>();
|
344 |
|
|
|
345 |
|
|
Enumeration<String> paramlist = (Enumeration<String>)request.getParameterNames();
|
346 |
|
|
while (paramlist.hasMoreElements()) {
|
347 |
|
|
String name = (String) paramlist.nextElement();
|
348 |
|
|
String[] value = request.getParameterValues(name);
|
349 |
|
|
params.put(name, value);
|
350 |
|
|
}
|
351 |
|
|
|
352 |
|
|
return params;
|
353 |
|
|
}
|
354 |
|
|
|
355 |
|
|
/**
|
356 |
4080
|
daigle
|
* Add a list of errors to the request. The pages will pick up the errors
|
357 |
|
|
* and display them where appropriate.
|
358 |
|
|
*
|
359 |
|
|
* @param request
|
360 |
|
|
* the request that will get forwarded
|
361 |
|
|
* @param errorVector
|
362 |
|
|
* a list of error strings
|
363 |
|
|
*/
|
364 |
|
|
public static void setRequestErrors(HttpServletRequest request,
|
365 |
|
|
Vector<String> errorVector) {
|
366 |
|
|
request.setAttribute("formErrors", "true");
|
367 |
|
|
request.setAttribute("processingErrors", errorVector);
|
368 |
|
|
}
|
369 |
|
|
|
370 |
|
|
/**
|
371 |
|
|
* Add a list of form errors to the request. The pages will pick up the
|
372 |
|
|
* errors and display them where appropriate.
|
373 |
|
|
*
|
374 |
|
|
* @param request
|
375 |
|
|
* the request that will get forwarded
|
376 |
|
|
* @param errorVector
|
377 |
|
|
* a list of form error strings
|
378 |
|
|
*/
|
379 |
|
|
public static void setRequestFormErrors(HttpServletRequest request,
|
380 |
|
|
Vector<String> errorVector) {
|
381 |
|
|
request.setAttribute("formErrors", "true");
|
382 |
|
|
request.setAttribute("formFieldErrors", errorVector);
|
383 |
|
|
}
|
384 |
|
|
|
385 |
|
|
/**
|
386 |
|
|
* Add a list of success messages to the request. The pages will pick up the
|
387 |
|
|
* messages and display them where appropriate.
|
388 |
|
|
*
|
389 |
|
|
* @param request
|
390 |
|
|
* the request that will get forwarded
|
391 |
|
|
* @param errorVector
|
392 |
|
|
* a list of success message strings
|
393 |
|
|
*/
|
394 |
|
|
public static void setRequestSuccess(HttpServletRequest request,
|
395 |
|
|
Vector<String> successVector) {
|
396 |
|
|
request.setAttribute("formSuccess", "true");
|
397 |
|
|
request.setAttribute("processingSuccess", successVector);
|
398 |
|
|
}
|
399 |
|
|
|
400 |
|
|
/**
|
401 |
|
|
* Add a list of general messages to the request. The pages will pick up the
|
402 |
|
|
* messages and display them where appropriate.
|
403 |
|
|
*
|
404 |
|
|
* @param request
|
405 |
|
|
* the request that will get forwarded
|
406 |
|
|
* @param errorVector
|
407 |
|
|
* a list of general message strings
|
408 |
|
|
*/
|
409 |
|
|
public static void setRequestMessage(HttpServletRequest request,
|
410 |
|
|
Vector<String> messageVector) {
|
411 |
|
|
request.setAttribute("formMessage", "true");
|
412 |
|
|
request.setAttribute("processingMessage", messageVector);
|
413 |
|
|
}
|
414 |
|
|
|
415 |
|
|
/**
|
416 |
|
|
* Add a list of general messages to the request. The pages will pick up the
|
417 |
|
|
* messages and display them where appropriate.
|
418 |
|
|
*
|
419 |
|
|
* @param request
|
420 |
|
|
* the request that will get forwarded
|
421 |
|
|
* @param errorVector
|
422 |
|
|
* a list of general message strings
|
423 |
|
|
*/
|
424 |
|
|
public static void clearRequestMessages(HttpServletRequest request) {
|
425 |
|
|
request.setAttribute("formMessage", null);
|
426 |
|
|
request.setAttribute("formSuccess", null);
|
427 |
|
|
request.setAttribute("formErrors", null);
|
428 |
|
|
request.setAttribute("processingMessage", null);
|
429 |
|
|
request.setAttribute("processingSuccess", null);
|
430 |
|
|
request.setAttribute("formFieldErrors", null);
|
431 |
|
|
request.setAttribute("processingErrors", null);
|
432 |
|
|
}
|
433 |
|
|
|
434 |
|
|
/**
|
435 |
|
|
* Add the user's login id to the session on this request
|
436 |
|
|
*
|
437 |
|
|
* @param request
|
438 |
|
|
* the request that will get forwarded
|
439 |
|
|
* @param userId
|
440 |
|
|
* the user's login id
|
441 |
|
|
*/
|
442 |
|
|
public static void setUserId(HttpServletRequest request, String userId) {
|
443 |
|
|
request.getSession().setAttribute("userId", userId);
|
444 |
|
|
}
|
445 |
4951
|
daigle
|
|
446 |
5027
|
daigle
|
private static String paramsToQuery(Hashtable<String, String[]> params) {
|
447 |
|
|
String query = "";
|
448 |
|
|
if (params != null) {
|
449 |
|
|
boolean firstParam = true;
|
450 |
|
|
for (String paramName : params.keySet()) {
|
451 |
|
|
if (firstParam) {
|
452 |
|
|
firstParam = false;
|
453 |
|
|
} else {
|
454 |
|
|
query += "&";
|
455 |
|
|
}
|
456 |
|
|
query += paramName + "=" + params.get(paramName)[0];
|
457 |
|
|
}
|
458 |
|
|
}
|
459 |
|
|
|
460 |
|
|
return query;
|
461 |
|
|
}
|
462 |
|
|
|
463 |
4951
|
daigle
|
|
464 |
4080
|
daigle
|
}
|