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/**
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* '$RCSfile$'
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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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*
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* '$Author: leinfelder $'
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* '$Date: 2014-04-24 13:28:01 -0700 (Thu, 24 Apr 2014) $'
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* '$Revision: 8748 $'
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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.client;
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.StringReader;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.io.Reader;
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import java.nio.charset.Charset;
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import java.util.ArrayList;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.Properties;
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import java.util.Vector;
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import javax.servlet.http.HttpServletRequest;
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import org.apache.commons.io.IOUtils;
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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.entity.mime.HttpMultipartMode;
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import org.apache.http.entity.mime.MultipartEntity;
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import org.apache.http.entity.mime.content.AbstractContentBody;
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import org.apache.http.entity.mime.content.ByteArrayBody;
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import org.apache.http.entity.mime.content.FileBody;
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import org.apache.http.entity.mime.content.InputStreamBody;
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import org.apache.http.entity.mime.content.StringBody;
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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.http.util.EntityUtils;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import edu.ucsb.nceas.utilities.IOUtil;
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import edu.ucsb.nceas.utilities.XMLUtilities;
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import java.io.File;
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/**
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* This interface provides methods for initializing and logging in to a
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* Metacat server, and then querying, reading, transforming, inserting,
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* updating and deleting documents from that server.
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*/
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public class MetacatClient implements Metacat {
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/** The URL string for the metacat server */
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private String metacatUrl;
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/** The session identifier for the session */
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private String sessionId;
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/** The default character encoding, can be changed by client */
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private String encoding = "UTF-8";
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public static void main(String[] args) {
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try {
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Metacat mc =
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MetacatFactory.createMetacatConnection(args[0]);
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InputStream r = mc.read(args[1]);
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FileOutputStream fos = new FileOutputStream(args[2]);
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BufferedOutputStream bfos = new BufferedOutputStream(fos);
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int c = r.read();
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while(c != -1)
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{
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bfos.write(c);
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c = r.read();
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}
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bfos.flush();
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bfos.close();
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fos.flush();
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fos.close();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* Constructor to create a new instance. Protected because instances
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* should only be created by the factory MetacatFactory.
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*/
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protected MetacatClient() {
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this.metacatUrl = null;
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this.sessionId = null;
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}
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/**
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* Method used to log in to a metacat server. Implementations will need
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* to cache a cookie value to make the session persistent. Each time a
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* call is made to one of the other methods (e.g., read), the cookie will
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* need to be passed back to the metacat server along with the request.
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*
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* @param username the username of the user, like an LDAP DN
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* @param password the password for that user for authentication
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* @return the response string from metacat in XML format
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* @throws MetacatAuthException when the username/password could
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* not be authenticated
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*/
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public String login(String username, String password)
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throws MetacatAuthException, MetacatInaccessibleException {
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Properties prop = new Properties();
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prop.put("action", "login");
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prop.put("qformat", "xml");
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prop.put("username", username);
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prop.put("password", password);
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// if (this.sessionId != null) {
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// prop.put("sessionid", sessionId);
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// }
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String response = null;
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try {
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InputStream result = sendParameters(prop);
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response = IOUtils.toString(result, encoding);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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if (response.indexOf("<login>") == -1) {
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setSessionId("");
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throw new MetacatAuthException(response);
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} else {
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int start = response.indexOf("<sessionId>") + 11;
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int end = response.indexOf("</sessionId>");
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if ((start != -1) && (end != -1)) {
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setSessionId(response.substring(start,end));
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}
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}
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return response;
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}
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/**
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* Method used to log in to a metacat server. Implementations will need
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* to cache a cookie value to make the session persistent. Each time a
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* call is made to one of the other methods (e.g., read), the cookie will
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* need to be passed back to the metacat server along with the request.
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*
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* @param username the username of the user, like an LDAP DN
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* @param password the password for that user for authentication
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* @return the response string from metacat in XML format
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* @throws MetacatAuthException when the username/password could
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* not be authenticated
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*/
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public String getloggedinuserinfo() throws MetacatInaccessibleException {
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Properties prop = new Properties();
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prop.put("action", "getloggedinuserinfo");
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prop.put("qformat", "xml");
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String response = null;
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try {
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InputStream result = sendParameters(prop);
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response = IOUtils.toString(result, encoding);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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return response;
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}
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/**
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* Method used to log out a metacat server. The Metacat server will end
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* the session when this call is invoked.
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*
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* @return the response string from metacat in XML format
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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*/
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public String logout() throws MetacatInaccessibleException, MetacatException {
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Properties prop = new Properties();
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prop.put("action", "logout");
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prop.put("qformat", "xml");
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if (this.sessionId != null) {
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prop.put("sessionid", sessionId);
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}
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String response = null;
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try {
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InputStream result = sendParameters(prop);
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response = IOUtils.toString(result, encoding);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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if (response.indexOf("<logout>") == -1) {
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throw new MetacatException(response);
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}
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setSessionId("");
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return response;
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}
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/**
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* Method used to log in to a metacat server. Implementations will need
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* to cache a cookie value to make the session persistent. Each time a
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* call is made to one of the other methods (e.g., read), the cookie will
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* need to be passed back to the metacat server along with the request.
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*
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* @param username the username of the user, like an LDAP DN
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* @param password the password for that user for authentication
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* @return the response string from metacat in XML format
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* @throws MetacatAuthException when the username/password could
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* not be authenticated
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*/
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public String validateSession(String sessionId)
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throws MetacatAuthException, MetacatInaccessibleException {
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Properties prop = new Properties();
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prop.put("action", "validatesession");
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prop.put("sessionid", sessionId);
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String response = null;
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try {
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InputStream result = sendParameters(prop);
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response = IOUtils.toString(result, encoding);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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if (response.indexOf("<validateSession><status>") == -1) {
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setSessionId("");
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throw new MetacatAuthException(response);
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}
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return response;
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}
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/**
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* Method used to log in to a metacat server. Implementations will need
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* to cache a cookie value to make the session persistent. Each time a
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* call is made to one of the other methods (e.g., read), the cookie will
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* need to be passed back to the metacat server along with the request.
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*
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* @param username the username of the user, like an LDAP DN
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* @param password the password for that user for authentication
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* @return the response string from metacat in XML format
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* @throws MetacatAuthException when the username/password could
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* not be authenticated
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*/
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public String isAuthorized(String resourceLsid, String permission, String sessionId)
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throws MetacatAuthException, MetacatInaccessibleException {
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Properties prop = new Properties();
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prop.put("action", "isauthorized");
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prop.put("resourceLsid", resourceLsid);
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prop.put("permission", permission);
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prop.put("sessionId", sessionId);
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String response = null;
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try {
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InputStream result = sendParameters(prop);
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response = IOUtils.toString(result, encoding);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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if (response.indexOf("<resourceAuthorization>") == -1) {
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System.out.println("invalid response: " + response);
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throw new MetacatAuthException(response);
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}
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return response;
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}
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/**
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* Read an XML document from the metacat server session, accessed by docid,
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* and returned as a Reader.
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*
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* @param docid the identifier of the document to be read
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* @return a Reader for accessing the document
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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*/
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public InputStream read(String docid) throws InsufficientKarmaException,
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MetacatInaccessibleException, MetacatException, DocumentNotFoundException {
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Reader r = null;
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Properties prop = new Properties();
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prop.put("action", "read");
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prop.put("qformat", "xml");
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prop.put("docid", docid);
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InputStream response = null;
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try {
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response = sendParameters(prop);
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} catch (Exception e) {
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throw new MetacatInaccessibleException(e.getMessage());
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}
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BufferedInputStream bis = new BufferedInputStream(response);
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r = new InputStreamReader(bis);
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try {
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bis.mark(512);
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char[] characters = new char[512];
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int len = r.read(characters, 0, 512);
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StringWriter sw = new StringWriter();
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sw.write(characters, 0, len);
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String message = sw.toString();
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sw.close();
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bis.reset();
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if (message.indexOf("<error>") != -1) {
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if (message.indexOf("does not have permission") != -1) {
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throw new InsufficientKarmaException(message);
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} else if(message.indexOf("does not exist") != -1) {
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throw new DocumentNotFoundException(message);
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} else {
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throw new MetacatException(message);
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}
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}
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} catch (IOException ioe) {
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throw new MetacatException(
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"MetacatClient: Error converting Reader to String."
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+ ioe.getMessage());
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}
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return bis;
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}
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348
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|
349
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350
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/**
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* Read inline data from the metacat server session, accessed by
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* inlinedataid and returned as a Reader.
|
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*
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* @param inlinedataid the identifier of the data to be read
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* @return a Reader for accessing the document
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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358
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* @throws MetacatInaccessibleException when the metacat server can not be
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359
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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361
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*/
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362
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public InputStream readInlineData(String inlinedataid)
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363
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throws InsufficientKarmaException,
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MetacatInaccessibleException, MetacatException {
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365
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Reader r = null;
|
366
|
|
367
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Properties prop = new Properties();
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prop.put("action", "readinlinedata");
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prop.put("inlinedataid", inlinedataid);
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|
|
371
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InputStream response = null;
|
372
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try {
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373
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response = sendParameters(prop);
|
374
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} catch (Exception e) {
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375
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throw new MetacatInaccessibleException(e.getMessage());
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376
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}
|
377
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BufferedInputStream bis = new BufferedInputStream(response);
|
378
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r = new InputStreamReader(bis);
|
379
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try {
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380
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bis.mark(512);
|
381
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char[] characters = new char[512];
|
382
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int len = r.read(characters, 0, 512);
|
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StringWriter sw = new StringWriter();
|
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sw.write(characters, 0, len);
|
385
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String message = sw.toString();
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sw.close();
|
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bis.reset();
|
388
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if (message.indexOf("<error>") != -1) {
|
389
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if (message.indexOf("does not have permission") != -1) {
|
390
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throw new InsufficientKarmaException(message);
|
391
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} else {
|
392
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throw new MetacatException(message);
|
393
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}
|
394
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}
|
395
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} catch (IOException ioe) {
|
396
|
throw new MetacatException(
|
397
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"MetacatClient: Error converting Reader to String."
|
398
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+ ioe.getMessage());
|
399
|
}
|
400
|
|
401
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return bis;
|
402
|
}
|
403
|
|
404
|
/**
|
405
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* Query the metacat document store with the given metacat-compatible
|
406
|
* query document and default qformat xml, and return the result set as a Reader.
|
407
|
*
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408
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* @param xmlQuery a Reader for accessing the XML version of the query
|
409
|
* @return a Reader for accessing the result set
|
410
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*/
|
411
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public Reader query(Reader xmlQuery) throws MetacatInaccessibleException,
|
412
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IOException {
|
413
|
String qformat = "xml";
|
414
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return query(xmlQuery, qformat);
|
415
|
}
|
416
|
|
417
|
/**
|
418
|
* Query the metacat document store with the given metacat-compatible
|
419
|
* query document and qformat, and return the result set as a Reader.
|
420
|
*
|
421
|
* @param xmlQuery a Reader for accessing the XML version of the query
|
422
|
* @param qformat the format of return doc. It can be xml, knb, lter and etal.
|
423
|
* @return a Reader for accessing the result set
|
424
|
*/
|
425
|
public Reader query(Reader xmlQuery, String qformat) throws MetacatInaccessibleException,
|
426
|
IOException {
|
427
|
Reader reader = null;
|
428
|
String query = null;
|
429
|
try {
|
430
|
query = IOUtil.getAsString(xmlQuery, true);
|
431
|
} catch (IOException ioE) {
|
432
|
throw ioE;
|
433
|
}
|
434
|
|
435
|
//set up properties
|
436
|
Properties prop = new Properties();
|
437
|
prop.put("action", "squery");
|
438
|
prop.put("qformat", qformat);
|
439
|
prop.put("query", query);
|
440
|
|
441
|
InputStream response = null;
|
442
|
try {
|
443
|
response = sendParameters(prop);
|
444
|
} catch (Exception e) {
|
445
|
throw new MetacatInaccessibleException(e.getMessage());
|
446
|
}
|
447
|
reader = new InputStreamReader(response);
|
448
|
return reader;
|
449
|
}
|
450
|
|
451
|
/**
|
452
|
* Insert an XML document into the repository.
|
453
|
*
|
454
|
* @param docid the docid to insert the document
|
455
|
* @param xmlDocument a Reader for accessing the XML document to be inserted
|
456
|
* @param schema a Reader for accessing the DTD or XML Schema for
|
457
|
* the document
|
458
|
* @return the metacat response message
|
459
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
460
|
* for the operation
|
461
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
462
|
* reached or does not respond
|
463
|
* @throws MetacatException when the metacat server generates another error
|
464
|
* @throws IOException when there is an error reading the xml document
|
465
|
*/
|
466
|
public String insert(String docid, Reader xmlDocument, Reader schema)
|
467
|
throws InsufficientKarmaException, MetacatException, IOException,
|
468
|
MetacatInaccessibleException {
|
469
|
|
470
|
String doctext = null;
|
471
|
String schematext = null;
|
472
|
try {
|
473
|
doctext = IOUtil.getAsString(xmlDocument, true);
|
474
|
if (schema != null) {
|
475
|
schematext = IOUtil.getAsString(schema, true);
|
476
|
}
|
477
|
} catch (IOException ioE) {
|
478
|
throw ioE;
|
479
|
}
|
480
|
|
481
|
//set up properties
|
482
|
Properties prop = new Properties();
|
483
|
prop.put("action", "insert");
|
484
|
prop.put("docid", docid);
|
485
|
prop.put("doctext", doctext);
|
486
|
if (schematext != null) {
|
487
|
prop.put("dtdtext", schematext);
|
488
|
}
|
489
|
|
490
|
// if (sessionId != null) {
|
491
|
// prop.put("sessionid", sessionId);
|
492
|
// }
|
493
|
|
494
|
String response = null;
|
495
|
try {
|
496
|
InputStream result = sendParameters(prop);
|
497
|
response = IOUtils.toString(result, encoding);
|
498
|
} catch (Exception e) {
|
499
|
throw new MetacatInaccessibleException(e.getMessage());
|
500
|
}
|
501
|
|
502
|
// Check for an error condition
|
503
|
if (response.indexOf("<error>") != -1) {
|
504
|
if (response.indexOf("does not have permission") != -1) {
|
505
|
throw new InsufficientKarmaException(response);
|
506
|
} else {
|
507
|
throw new MetacatException(response);
|
508
|
}
|
509
|
}
|
510
|
|
511
|
return response;
|
512
|
}
|
513
|
|
514
|
/**
|
515
|
* Update an XML document in the repository.
|
516
|
*
|
517
|
* @param docid the docid to update
|
518
|
* @param xmlDocument a Reader for accessing the XML text to be updated
|
519
|
* @param schema a Reader for accessing the DTD or XML Schema for
|
520
|
* the document
|
521
|
* @return the metacat response message
|
522
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
523
|
* for the operation
|
524
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
525
|
* reached or does not respond
|
526
|
* @throws MetacatException when the metacat server generates another error
|
527
|
* @throws IOException when there is an error reading the xml document
|
528
|
*/
|
529
|
public String update(String docid, Reader xmlDocument, Reader schema)
|
530
|
throws InsufficientKarmaException, MetacatException, IOException,
|
531
|
MetacatInaccessibleException {
|
532
|
String doctext = null;
|
533
|
String schematext = null;
|
534
|
try {
|
535
|
doctext = IOUtil.getAsString(xmlDocument, true);
|
536
|
if (schema != null) {
|
537
|
schematext = IOUtil.getAsString(schema, true);
|
538
|
}
|
539
|
} catch (IOException ioE) {
|
540
|
throw ioE;
|
541
|
}
|
542
|
|
543
|
//set up properties
|
544
|
Properties prop = new Properties();
|
545
|
prop.put("action", "update");
|
546
|
prop.put("docid", docid);
|
547
|
prop.put("doctext", doctext);
|
548
|
if (schematext != null) {
|
549
|
prop.put("dtdtext", schematext);
|
550
|
}
|
551
|
|
552
|
String response = null;
|
553
|
try {
|
554
|
InputStream result = sendParameters(prop);
|
555
|
response = IOUtils.toString(result, encoding);
|
556
|
} catch (Exception e) {
|
557
|
throw new MetacatInaccessibleException(e.getMessage());
|
558
|
}
|
559
|
|
560
|
// Check for an error condition
|
561
|
if (response.indexOf("<error>") != -1) {
|
562
|
if (response.indexOf("does not have permission") != -1) {
|
563
|
throw new InsufficientKarmaException(response);
|
564
|
} else {
|
565
|
throw new MetacatException(response);
|
566
|
}
|
567
|
}
|
568
|
|
569
|
return response;
|
570
|
}
|
571
|
|
572
|
/**
|
573
|
* Upload a data document into the repository. Data files are stored on
|
574
|
* metacat and may be in any format (binary or text), but they are all
|
575
|
* treated as if they were binary. Data files are not searched by the
|
576
|
* query() methods because they are not loaded into the XML store because
|
577
|
* they are not XML documents. The File parameter is used to determine a
|
578
|
* name for the uploaded document.
|
579
|
*
|
580
|
* @param docid the identifier to be used for the document
|
581
|
* @param file the File to be uploaded
|
582
|
* @param document a InputStream containing the data to be uploaded
|
583
|
* @return the metacat response message
|
584
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
585
|
* for the operation
|
586
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
587
|
* reached or does not respond
|
588
|
* @throws MetacatException when the metacat server generates another error
|
589
|
* @throws IOException when there is an error reading the xml document
|
590
|
*/
|
591
|
public String upload(String docid, File file)
|
592
|
throws InsufficientKarmaException, MetacatException, IOException,
|
593
|
MetacatInaccessibleException {
|
594
|
|
595
|
HttpClient httpclient = new DefaultHttpClient();
|
596
|
httpclient.getParams().setParameter(
|
597
|
CoreProtocolPNames.PROTOCOL_VERSION,
|
598
|
HttpVersion.HTTP_1_1);
|
599
|
httpclient.getParams().setParameter(
|
600
|
CoreProtocolPNames.HTTP_CONTENT_CHARSET,
|
601
|
encoding);
|
602
|
|
603
|
HttpPost post = new HttpPost(metacatUrl);
|
604
|
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
|
605
|
|
606
|
// For File parameters
|
607
|
entity.addPart("datafile", new FileBody(file));
|
608
|
|
609
|
//set up properties
|
610
|
Properties prop = new Properties();
|
611
|
prop.put("action", "upload");
|
612
|
prop.put("docid", docid);
|
613
|
|
614
|
// For usual String parameters
|
615
|
Enumeration<Object> keys = prop.keys();
|
616
|
while (keys.hasMoreElements()) {
|
617
|
String key = (String) keys.nextElement();
|
618
|
String value = prop.getProperty(key);
|
619
|
entity.addPart(key, new StringBody(value, Charset.forName(encoding)));
|
620
|
}
|
621
|
|
622
|
post.setHeader("Cookie", "JSESSIONID="+ this.sessionId);
|
623
|
post.setEntity(entity);
|
624
|
|
625
|
String response = null;
|
626
|
try {
|
627
|
response = EntityUtils.toString(httpclient.execute(post).getEntity(), encoding);
|
628
|
httpclient.getConnectionManager().shutdown();
|
629
|
} catch (Exception e) {
|
630
|
throw new MetacatInaccessibleException(e.getMessage());
|
631
|
}
|
632
|
|
633
|
// Check for an error condition
|
634
|
if (response.indexOf("<error>") != -1) {
|
635
|
if (response.indexOf("does not have permission") != -1) {
|
636
|
throw new InsufficientKarmaException(response);
|
637
|
} else {
|
638
|
throw new MetacatException(response);
|
639
|
}
|
640
|
}
|
641
|
|
642
|
return response;
|
643
|
}
|
644
|
|
645
|
/**
|
646
|
* Upload a data document into the repository. Data files are stored on
|
647
|
* metacat and may be in any format (binary or text), but they are all
|
648
|
* treated as if they were binary. Data files are not searched by the
|
649
|
* query() methods because they are not loaded into the XML store because
|
650
|
* they are not XML documents. The name for the document is set explicitly
|
651
|
* using the filename parameter.
|
652
|
*
|
653
|
* @param docid the identifier to be used for the document
|
654
|
* @param filename the name to be used in the MIME description of the uploaded file
|
655
|
* @param document a InputStream containing the data to be uploaded
|
656
|
* @return the metacat response message
|
657
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
658
|
* for the operation
|
659
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
660
|
* reached or does not respond
|
661
|
* @throws MetacatException when the metacat server generates another error
|
662
|
* @throws IOException when there is an error reading the xml document
|
663
|
*/
|
664
|
public String upload(String docid, String filename, InputStream fileData,
|
665
|
int size)
|
666
|
throws InsufficientKarmaException, MetacatException, IOException,
|
667
|
MetacatInaccessibleException {
|
668
|
|
669
|
HttpClient httpclient = new DefaultHttpClient();
|
670
|
httpclient.getParams().setParameter(
|
671
|
CoreProtocolPNames.PROTOCOL_VERSION,
|
672
|
HttpVersion.HTTP_1_1);
|
673
|
httpclient.getParams().setParameter(
|
674
|
CoreProtocolPNames.HTTP_CONTENT_CHARSET,
|
675
|
encoding);
|
676
|
|
677
|
HttpPost post = new HttpPost(metacatUrl);
|
678
|
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
|
679
|
|
680
|
// For File parameters
|
681
|
AbstractContentBody content = null;
|
682
|
if (size < 0) {
|
683
|
content = new InputStreamBody(fileData, filename);
|
684
|
//content = new ByteArrayBody(IOUtils.toByteArray(fileData), filename);
|
685
|
} else {
|
686
|
content = new InputStreamKnownSizeBody(fileData, filename, size);
|
687
|
}
|
688
|
entity.addPart("datafile", content);
|
689
|
|
690
|
//set up properties
|
691
|
Properties prop = new Properties();
|
692
|
prop.put("action", "upload");
|
693
|
prop.put("docid", docid);
|
694
|
|
695
|
// For usual String parameters
|
696
|
Enumeration<Object> keys = prop.keys();
|
697
|
while (keys.hasMoreElements()) {
|
698
|
String key = (String) keys.nextElement();
|
699
|
String value = prop.getProperty(key);
|
700
|
entity.addPart(key, new StringBody(value, Charset.forName(encoding)));
|
701
|
}
|
702
|
|
703
|
post.setHeader("Cookie", "JSESSIONID="+ this.sessionId);
|
704
|
post.setEntity(entity);
|
705
|
|
706
|
String response = null;
|
707
|
try {
|
708
|
response = EntityUtils.toString(httpclient.execute(post).getEntity(), encoding);
|
709
|
httpclient.getConnectionManager().shutdown();
|
710
|
} catch (Exception e) {
|
711
|
throw new MetacatInaccessibleException(e.getMessage());
|
712
|
}
|
713
|
|
714
|
// Check for an error condition
|
715
|
if (response.indexOf("<error>") != -1) {
|
716
|
if (response.indexOf("does not have permission") != -1) {
|
717
|
throw new InsufficientKarmaException(response);
|
718
|
} else {
|
719
|
throw new MetacatException(response);
|
720
|
}
|
721
|
}
|
722
|
|
723
|
return response;
|
724
|
}
|
725
|
|
726
|
/**
|
727
|
* Delete an XML document in the repository.
|
728
|
*
|
729
|
* @param docid the docid to delete
|
730
|
* @return the metacat response message
|
731
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
732
|
* for the operation
|
733
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
734
|
* reached or does not respond
|
735
|
* @throws MetacatException when the metacat server generates another error
|
736
|
*/
|
737
|
public String delete(String docid)
|
738
|
throws InsufficientKarmaException, MetacatException,
|
739
|
MetacatInaccessibleException {
|
740
|
//set up properties
|
741
|
Properties prop = new Properties();
|
742
|
prop.put("action", "delete");
|
743
|
prop.put("docid", docid);
|
744
|
|
745
|
String response = null;
|
746
|
try {
|
747
|
InputStream result = sendParameters(prop);
|
748
|
response = IOUtils.toString(result, encoding);
|
749
|
} catch (Exception e) {
|
750
|
throw new MetacatInaccessibleException(e.getMessage());
|
751
|
}
|
752
|
|
753
|
// Check for an error condition
|
754
|
if (response.indexOf("<error>") != -1) {
|
755
|
if (response.indexOf("does not have permission") != -1) {
|
756
|
throw new InsufficientKarmaException(response);
|
757
|
} else {
|
758
|
throw new MetacatException(response);
|
759
|
}
|
760
|
}
|
761
|
return response;
|
762
|
}
|
763
|
|
764
|
/**
|
765
|
* get the access control info for a given document id.
|
766
|
*
|
767
|
* @param _docid the docid of the document for which the access should be applied.
|
768
|
*
|
769
|
* @return the metacat access xml
|
770
|
*/
|
771
|
public String getAccessControl(String docid)
|
772
|
throws InsufficientKarmaException, MetacatException,MetacatInaccessibleException {
|
773
|
//set up properties
|
774
|
Properties prop = new Properties();
|
775
|
prop.put("action", "getaccesscontrol");
|
776
|
prop.put("docid", docid);
|
777
|
|
778
|
String response = null;
|
779
|
try {
|
780
|
InputStream result = sendParameters(prop);
|
781
|
response = IOUtils.toString(result, encoding);
|
782
|
} catch (Exception e) {
|
783
|
throw new MetacatInaccessibleException(e.getMessage());
|
784
|
}
|
785
|
|
786
|
// Check for an error condition
|
787
|
if (response.indexOf("<error>") != -1) {
|
788
|
if (response.indexOf("does not have permission") != -1) {
|
789
|
throw new InsufficientKarmaException(response);
|
790
|
} else {
|
791
|
throw new MetacatException(response);
|
792
|
}
|
793
|
}
|
794
|
return response;
|
795
|
}
|
796
|
|
797
|
/**
|
798
|
* set the access on an XML document in the repository.
|
799
|
*
|
800
|
* @param _docid the docid of the document for which the access should be applied.
|
801
|
*
|
802
|
* @param _principal the document's principal
|
803
|
*
|
804
|
* @param _permission the access permission to be applied to the docid
|
805
|
* {e.g. read,write,all}
|
806
|
*
|
807
|
* @param _permType the permission type to be applied to the document
|
808
|
* {e.g. allow or deny}
|
809
|
*
|
810
|
* @param _permOrder the order that the document's permissions should be
|
811
|
* processed {e.g. denyFirst or allowFirst}
|
812
|
*
|
813
|
*
|
814
|
* @return the metacat response message
|
815
|
*
|
816
|
* @throws InsufficientKarmaException when the user has insufficent rights
|
817
|
* for the operation
|
818
|
* @throws MetacatInaccessibleException when the metacat server can not be
|
819
|
* reached or does not respond
|
820
|
* @throws MetacatException when the metacat server generates another error
|
821
|
*/
|
822
|
public String setAccess(String docid, String principal, String
|
823
|
permission, String permType, String permOrder )
|
824
|
throws InsufficientKarmaException, MetacatException,
|
825
|
MetacatInaccessibleException {
|
826
|
//set up properties
|
827
|
Properties prop = new Properties();
|
828
|
prop.put("action", "setaccess");
|
829
|
prop.put("docid", docid);
|
830
|
prop.put("principal", principal);
|
831
|
prop.put("permission", permission);
|
832
|
prop.put("permType", permType);
|
833
|
prop.put("permOrder", permOrder);
|
834
|
|
835
|
String response = null;
|
836
|
try {
|
837
|
InputStream result = sendParameters(prop);
|
838
|
response = IOUtils.toString(result, encoding);
|
839
|
} catch (Exception e) {
|
840
|
throw new MetacatInaccessibleException(e.getMessage());
|
841
|
}
|
842
|
|
843
|
// Check for an error condition
|
844
|
if (response.indexOf("<error>") != -1) {
|
845
|
if (response.indexOf("does not have permission") != -1) {
|
846
|
throw new InsufficientKarmaException(response);
|
847
|
} else {
|
848
|
throw new MetacatException(response);
|
849
|
}
|
850
|
}
|
851
|
return response;
|
852
|
}
|
853
|
|
854
|
/**
|
855
|
* Set access for a given doc id. The access is represented in an access
|
856
|
* block of xml. All existing access will be replaced with the access
|
857
|
* provided in the access block.
|
858
|
*
|
859
|
* @param docid
|
860
|
* the doc id for the doc we want to update
|
861
|
* @param accessBlock
|
862
|
* the xml access block. This is the same structure as that
|
863
|
* returned by the getdocumentinfo action in metacat.
|
864
|
* @return a string holding the response xml
|
865
|
*/
|
866
|
public String setAccess(String docid, String accessBlock)
|
867
|
throws InsufficientKarmaException, MetacatException, MetacatInaccessibleException {
|
868
|
//set up properties
|
869
|
Properties prop = new Properties();
|
870
|
prop.put("action", "setaccess");
|
871
|
prop.put("docid", docid);
|
872
|
prop.put("accessBlock", accessBlock);
|
873
|
|
874
|
String response = null;
|
875
|
try {
|
876
|
InputStream result = sendParameters(prop);
|
877
|
response = IOUtils.toString(result, encoding);
|
878
|
} catch (Exception e) {
|
879
|
throw new MetacatInaccessibleException(e.getMessage());
|
880
|
}
|
881
|
|
882
|
// Check for an error condition
|
883
|
if (response.indexOf("<error>") != -1) {
|
884
|
if (response.indexOf("does not have permission") != -1) {
|
885
|
throw new InsufficientKarmaException(response);
|
886
|
} else {
|
887
|
throw new MetacatException(response);
|
888
|
}
|
889
|
}
|
890
|
return response;
|
891
|
}
|
892
|
|
893
|
/**
|
894
|
* When the MetacatFactory creates an instance it needs to set the
|
895
|
* MetacatUrl to which connections should be made.
|
896
|
*
|
897
|
* @param metacatUrl the URL for the metacat server
|
898
|
*/
|
899
|
public void setMetacatUrl(String metacatUrl) {
|
900
|
this.metacatUrl = metacatUrl;
|
901
|
}
|
902
|
|
903
|
/**
|
904
|
* Get the session identifier for this session. This is only valid if
|
905
|
* the login methods has been called successfully for this Metacat object
|
906
|
* beforehand.
|
907
|
*
|
908
|
* @returns the sessionId as a String, or null if the session is invalid
|
909
|
*/
|
910
|
public String getSessionId() {
|
911
|
return this.sessionId;
|
912
|
}
|
913
|
|
914
|
/**
|
915
|
* Set the session identifier for this session. This identifier was
|
916
|
* previously established with a call to login. To continue to use the
|
917
|
* same session, set the session id before making a call to one of the
|
918
|
* metacat access methods (e.g., read, query, insert, etc.).
|
919
|
*
|
920
|
* @param String the sessionId from a previously established session
|
921
|
*/
|
922
|
public void setSessionId(String sessionId) {
|
923
|
this.sessionId = sessionId;
|
924
|
}
|
925
|
|
926
|
/**
|
927
|
* The method will return the latest revision in metacat server
|
928
|
* for a given document id. If some error happens, this method will throw
|
929
|
* an exception.
|
930
|
* @param docId String the given docid you want to use. the docid it self
|
931
|
* can have or haven't revision number
|
932
|
* @throws MetacatException
|
933
|
*/
|
934
|
public int getNewestDocRevision(String docId) throws MetacatException {
|
935
|
int rev = 0;
|
936
|
//set up properties
|
937
|
Properties prop = new Properties();
|
938
|
prop.put("action", "getrevisionanddoctype");
|
939
|
prop.put("docid", docId);
|
940
|
|
941
|
String response = null;
|
942
|
try {
|
943
|
InputStream result = sendParameters(prop);
|
944
|
response = IOUtils.toString(result, encoding);
|
945
|
//parseRevisionResponse will return null if there is an
|
946
|
//error that it can't handle
|
947
|
String revStr = parserRevisionResponse(response);
|
948
|
Integer revObj = new Integer(revStr);
|
949
|
rev = revObj.intValue();
|
950
|
// Check for an error condition
|
951
|
if (response.indexOf("<error>") != -1 && revStr == null) {
|
952
|
throw new MetacatException(response);
|
953
|
}
|
954
|
} catch (Exception e) {
|
955
|
throw new MetacatException(e.getMessage());
|
956
|
}
|
957
|
return rev;
|
958
|
}
|
959
|
|
960
|
/**
|
961
|
* Return the highest document id for a given scope. This is used by
|
962
|
* clients to make it easier to determine the next free identifier in a
|
963
|
* sequence for a given scope.
|
964
|
* @param scope String the scope to use for looking up the latest id
|
965
|
* @throws MetacatException when an error occurs
|
966
|
*/
|
967
|
public String getLastDocid(String scope) throws MetacatException {
|
968
|
String lastIdentifier = "";
|
969
|
//set up properties
|
970
|
Properties prop = new Properties();
|
971
|
prop.put("action", "getlastdocid");
|
972
|
prop.put("scope", scope);
|
973
|
|
974
|
String response = null;
|
975
|
try {
|
976
|
InputStream result = sendParameters(prop);
|
977
|
response = IOUtils.toString(result, encoding);
|
978
|
// Check for an error condition
|
979
|
if (response.indexOf("<error>") != -1) {
|
980
|
throw new MetacatException(response);
|
981
|
} else {
|
982
|
Reader responseReader = new StringReader(response);
|
983
|
Node root =
|
984
|
XMLUtilities.getXMLReaderAsDOMTreeRootNode(responseReader);
|
985
|
Node docidNode =
|
986
|
XMLUtilities.getNodeWithXPath(root, "/lastDocid/docid");
|
987
|
lastIdentifier = docidNode.getFirstChild().getNodeValue();
|
988
|
}
|
989
|
} catch (Exception e) {
|
990
|
throw new MetacatException(e.getMessage());
|
991
|
}
|
992
|
return lastIdentifier;
|
993
|
}
|
994
|
|
995
|
/**
|
996
|
* return a list of all docids that match a given scope. if scope is null
|
997
|
* return all docids registered in the system
|
998
|
* @param scope String the scope to use to limit the docid query
|
999
|
* @throws MetacatException when an error occurs
|
1000
|
*/
|
1001
|
public Vector getAllDocids(String scope) throws MetacatException {
|
1002
|
Vector resultVec = new Vector();
|
1003
|
//set up properties
|
1004
|
Properties prop = new Properties();
|
1005
|
prop.put("action", "getalldocids");
|
1006
|
if(scope != null) {
|
1007
|
prop.put("scope", scope);
|
1008
|
}
|
1009
|
|
1010
|
String response = null;
|
1011
|
try {
|
1012
|
InputStream result = sendParameters(prop);
|
1013
|
response = IOUtils.toString(result, encoding);
|
1014
|
// Check for an error condition
|
1015
|
if (response.indexOf("<error>") != -1) {
|
1016
|
throw new MetacatException(response);
|
1017
|
} else {
|
1018
|
Reader responseReader = new StringReader(response);
|
1019
|
Node root =
|
1020
|
XMLUtilities.getXMLReaderAsDOMTreeRootNode(responseReader);
|
1021
|
NodeList nlist = root.getChildNodes();
|
1022
|
for(int i=0; i<nlist.getLength(); i++) {
|
1023
|
Node n = nlist.item(i);
|
1024
|
if(n.getNodeName().equals("docid")) {
|
1025
|
//add the content to the return vector
|
1026
|
String nodeVal = n.getFirstChild().getNodeValue();
|
1027
|
resultVec.addElement(nodeVal);
|
1028
|
}
|
1029
|
}
|
1030
|
|
1031
|
}
|
1032
|
} catch (Exception e) {
|
1033
|
throw new MetacatException(e.getMessage());
|
1034
|
}
|
1035
|
return resultVec;
|
1036
|
}
|
1037
|
|
1038
|
/**
|
1039
|
* return true of the given docid is registered, false if not
|
1040
|
* @param scope String the scope to use to limit the docid query
|
1041
|
* @throws MetacatException when an error occurs
|
1042
|
*/
|
1043
|
public boolean isRegistered(String docid) throws MetacatException {
|
1044
|
Vector resultVec = new Vector();
|
1045
|
//set up properties
|
1046
|
Properties prop = new Properties();
|
1047
|
prop.put("action", "isregistered");
|
1048
|
if(docid == null) {
|
1049
|
throw new MetacatException("<error>Cannot check if a null docid " +
|
1050
|
"is registered.</error>");
|
1051
|
}
|
1052
|
prop.put("docid", docid);
|
1053
|
|
1054
|
String response = null;
|
1055
|
try {
|
1056
|
InputStream result = sendParameters(prop);
|
1057
|
response = IOUtils.toString(result, encoding);
|
1058
|
// Check for an error condition
|
1059
|
if (response.indexOf("<error>") != -1) {
|
1060
|
throw new MetacatException(response);
|
1061
|
} else {
|
1062
|
if (response.indexOf("true") != -1) {
|
1063
|
return true;
|
1064
|
}
|
1065
|
return false;
|
1066
|
}
|
1067
|
} catch (Exception e) {
|
1068
|
throw new MetacatException(e.getMessage());
|
1069
|
}
|
1070
|
}
|
1071
|
|
1072
|
/**
|
1073
|
* Send a request to Metacat. An alternative to the sentData method.
|
1074
|
* Allows for sending multiple parameters with the same name,
|
1075
|
* different names, or any combo. Send properties where the entry
|
1076
|
* key contains the "param key",
|
1077
|
* and the entry value contains the "param value".
|
1078
|
* Constraint: no multi-valued parameters are supported
|
1079
|
*
|
1080
|
* @return InputStream as returned by Metacat
|
1081
|
* @param args Properties of the parameters to be sent to Metacat, where,
|
1082
|
* key = param key
|
1083
|
* value = param value
|
1084
|
* @throws java.lang.Exception thrown
|
1085
|
*/
|
1086
|
synchronized public InputStream sendParameters(Properties prop) throws Exception {
|
1087
|
InputStream result = null;
|
1088
|
try {
|
1089
|
HttpClient httpclient = new DefaultHttpClient();
|
1090
|
httpclient.getParams().setParameter(
|
1091
|
CoreProtocolPNames.PROTOCOL_VERSION,
|
1092
|
HttpVersion.HTTP_1_1);
|
1093
|
httpclient.getParams().setParameter(
|
1094
|
CoreProtocolPNames.HTTP_CONTENT_CHARSET,
|
1095
|
encoding);
|
1096
|
HttpPost post = new HttpPost(metacatUrl);
|
1097
|
//set the params
|
1098
|
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
|
1099
|
Enumeration<Object> keys = prop.keys();
|
1100
|
while (keys.hasMoreElements()) {
|
1101
|
String key = (String) keys.nextElement();
|
1102
|
String value = prop.getProperty(key);
|
1103
|
NameValuePair nvp = new BasicNameValuePair(key, value);
|
1104
|
nameValuePairs.add(nvp);
|
1105
|
}
|
1106
|
post.setEntity(new UrlEncodedFormEntity(nameValuePairs, encoding));
|
1107
|
post.setHeader("Cookie", "JSESSIONID="+ this.sessionId);
|
1108
|
HttpResponse httpResponse = httpclient.execute(post);
|
1109
|
result = httpResponse.getEntity().getContent();
|
1110
|
//httpclient.getConnectionManager().shutdown();
|
1111
|
} catch (Exception e) {
|
1112
|
throw new MetacatInaccessibleException(e.getMessage());
|
1113
|
}
|
1114
|
return result;
|
1115
|
}
|
1116
|
|
1117
|
/**
|
1118
|
* Send a request to Metacat.
|
1119
|
* NOTE: Send properties where the entry
|
1120
|
* key contains the "param value",
|
1121
|
* and the entry value contains the "param name".
|
1122
|
* Constraint: param values must be unique.
|
1123
|
*
|
1124
|
* @return InputStream as returned by Metacat
|
1125
|
* @param args Properties of the parameters to be sent to Metacat, where,
|
1126
|
* key = param value
|
1127
|
* value = param name
|
1128
|
* @throws java.lang.Exception thrown
|
1129
|
*/
|
1130
|
synchronized public InputStream sendParametersInverted(Properties prop) throws Exception {
|
1131
|
InputStream result = null;
|
1132
|
try {
|
1133
|
HttpClient httpclient = new DefaultHttpClient();
|
1134
|
httpclient.getParams().setParameter(
|
1135
|
CoreProtocolPNames.PROTOCOL_VERSION,
|
1136
|
HttpVersion.HTTP_1_1);
|
1137
|
httpclient.getParams().setParameter(
|
1138
|
CoreProtocolPNames.HTTP_CONTENT_CHARSET,
|
1139
|
encoding);
|
1140
|
HttpPost post = new HttpPost(metacatUrl);
|
1141
|
//set the params
|
1142
|
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
|
1143
|
Enumeration<Object> keys = prop.keys();
|
1144
|
while (keys.hasMoreElements()) {
|
1145
|
// NOTE: using the value as the key for multi-valued parameters
|
1146
|
String key = (String) keys.nextElement();
|
1147
|
String value = prop.getProperty(key);
|
1148
|
NameValuePair nvp = new BasicNameValuePair(value, key);
|
1149
|
nameValuePairs.add(nvp);
|
1150
|
}
|
1151
|
post.setEntity(new UrlEncodedFormEntity(nameValuePairs, encoding));
|
1152
|
post.setHeader("Cookie", "JSESSIONID="+ this.sessionId);
|
1153
|
HttpResponse httpResponse = httpclient.execute(post);
|
1154
|
result = httpResponse.getEntity().getContent();
|
1155
|
//httpclient.getConnectionManager().shutdown();
|
1156
|
} catch (Exception e) {
|
1157
|
throw new MetacatInaccessibleException(e.getMessage());
|
1158
|
}
|
1159
|
return result;
|
1160
|
}
|
1161
|
|
1162
|
/*
|
1163
|
* "getversionanddoctype" action will return a string from metacat server.
|
1164
|
* The string format is "revision;doctype"(This is bad idea, we should use xml)
|
1165
|
* This method will get revision string from the response string
|
1166
|
*/
|
1167
|
private String parserRevisionResponse(String response) throws Exception {
|
1168
|
String revision = null;
|
1169
|
if (response != null) {
|
1170
|
if(response.indexOf("<error>") != -1) {
|
1171
|
if(response.indexOf("There is not record") != -1) {
|
1172
|
return "0";
|
1173
|
} else {
|
1174
|
return null;
|
1175
|
}
|
1176
|
} else {
|
1177
|
int firstSemiCol = response.indexOf(";");
|
1178
|
revision = response.substring(0, firstSemiCol);
|
1179
|
}
|
1180
|
}
|
1181
|
return revision;
|
1182
|
}
|
1183
|
|
1184
|
/**
|
1185
|
* JSP API: This is a convenience method to reduce the amount of code in a Metacat Client
|
1186
|
* JSP. It handles creating/reusing an instance of a MetacatClient.
|
1187
|
* @param request Since this is intended to be used by a JSP, it is passed the
|
1188
|
* available "request" variable (the HttpServletRequest).
|
1189
|
* @throws edu.ucsb.nceas.metacat.client.MetacatInaccessibleException Received by MetacatFactory.
|
1190
|
* @return MetacatClient instance.
|
1191
|
*/
|
1192
|
public static MetacatClient getMetacatClient(HttpServletRequest request) throws MetacatInaccessibleException {
|
1193
|
MetacatClient result;
|
1194
|
String metacatPath = "http://%1$s%2$s/metacat";
|
1195
|
String host, context;
|
1196
|
javax.servlet.http.HttpSession session;
|
1197
|
|
1198
|
session = request.getSession();
|
1199
|
result = (MetacatClient) session.getAttribute("MetacatClient");
|
1200
|
if (result == null) {
|
1201
|
host = request.getHeader("host");
|
1202
|
context = request.getContextPath();
|
1203
|
metacatPath = metacatPath.replaceFirst("%1$s", host);
|
1204
|
metacatPath = metacatPath.replaceFirst("%2$s", context);
|
1205
|
result = (MetacatClient) MetacatFactory.createMetacatConnection(metacatPath);
|
1206
|
session.setAttribute("MetacatClient", result);
|
1207
|
}
|
1208
|
return(result);
|
1209
|
}
|
1210
|
|
1211
|
public String getEncoding() {
|
1212
|
return encoding;
|
1213
|
}
|
1214
|
|
1215
|
public void setEncoding(String encoding) {
|
1216
|
this.encoding = encoding;
|
1217
|
}
|
1218
|
|
1219
|
}
|
1220
|
|
1221
|
class InputStreamKnownSizeBody extends InputStreamBody {
|
1222
|
private int length;
|
1223
|
|
1224
|
public InputStreamKnownSizeBody(
|
1225
|
final InputStream in,
|
1226
|
final String filename,
|
1227
|
final int length) {
|
1228
|
super(in, filename);
|
1229
|
this.length = length;
|
1230
|
}
|
1231
|
|
1232
|
@Override
|
1233
|
public long getContentLength() {
|
1234
|
return this.length;
|
1235
|
}
|
1236
|
}
|