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/**
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* '$RCSfile$'
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* Copyright: 2011 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: Serhan AKIN $'
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* '$Date: 2009-06-13 15:28:13 +0300 $'
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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.restservice;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.PrintWriter;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Timer;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.xml.parsers.ParserConfigurationException;
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import org.apache.commons.fileupload.FileUploadException;
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import org.apache.commons.io.IOUtils;
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import org.apache.log4j.Logger;
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import org.dataone.client.auth.CertificateManager;
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import org.dataone.mimemultipart.MultipartRequest;
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import org.dataone.mimemultipart.MultipartRequestResolver;
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import org.dataone.service.exceptions.BaseException;
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import org.dataone.service.exceptions.InvalidRequest;
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import org.dataone.service.exceptions.ServiceFailure;
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import org.dataone.service.types.v1.AccessPolicy;
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import org.dataone.service.types.v1.Replica;
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import org.dataone.service.types.v1.ReplicationPolicy;
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import org.dataone.service.types.v1.Session;
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import org.dataone.service.types.v1.SystemMetadata;
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import org.dataone.service.util.TypeMarshaller;
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import org.jibx.runtime.JiBXException;
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import org.xml.sax.SAXException;
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import edu.ucsb.nceas.metacat.MetacatHandler;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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/**
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*
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* Base class for handling D1 REST calls in Metacat
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*
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* @author leinfelder
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*/
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public class D1ResourceHandler {
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/**HTTP Verb GET*/
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public static final byte GET = 1;
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/**HTTP Verb POST*/
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public static final byte POST = 2;
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/**HTTP Verb PUT*/
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public static final byte PUT = 3;
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/**HTTP Verb DELETE*/
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public static final byte DELETE = 4;
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/**HTTP Verb HEAD*/
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public static final byte HEAD = 5;
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/*
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* API Resources
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*/
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protected static final String RESOURCE_BASE_URL = "d1";
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protected static final String RESOURCE_OBJECTS = "object";
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protected static final String RESOURCE_META = "meta";
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protected static final String RESOURCE_LOG = "log";
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protected static final String RESOURCE_CHECKSUM = "checksum";
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protected static final String RESOURCE_IS_AUTHORIZED = "isAuthorized";
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protected static final String RESOURCE_ACCESS_RULES = "accessRules";
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/*
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* API Functions used as URL parameters
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*/
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protected static final String FUNCTION_NAME_INSERT = "insert";
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protected static final String FUNCTION_NAME_UPDATE = "update";
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protected ServletContext servletContext;
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protected Logger logMetacat;
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protected MetacatHandler handler;
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protected HttpServletRequest request;
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protected HttpServletResponse response;
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protected Hashtable<String, String[]> params;
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protected Map<String, List<String>> multipartparams;
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// D1 certificate-based authentication
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protected Session session;
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/**Initializes new instance by setting servlet context,request and response*/
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public D1ResourceHandler(ServletContext servletContext,
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HttpServletRequest request, HttpServletResponse response) {
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this.servletContext = servletContext;
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this.request = request;
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this.response = response;
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}
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/**
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* This function is called from REST API servlet and handles each request
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*
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* @param httpVerb (GET, POST, PUT or DELETE)
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*/
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public void handle(byte httpVerb) {
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logMetacat = Logger.getLogger(D1ResourceHandler.class);
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try {
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// load session from certificate in request
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session = CertificateManager.getInstance().getSession(request);
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// initialize the parameters
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params = new Hashtable<String, String[]>();
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initParams();
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// create the handler for interacting with Metacat
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Timer timer = new Timer();
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handler = new MetacatHandler(timer);
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} catch (Exception e) {
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// TODO: more D1 structure when failing here
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response.setStatus(400);
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printError("Incorrect resource!", response);
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logMetacat.error(e.getClass() + ": " + e.getMessage(), e);
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}
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}
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protected String parseTrailing(String resource, String token) {
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// get the rest
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String extra = null;
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if (resource.indexOf(token) != -1) {
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// what comes after the token?
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extra = resource.substring(resource.indexOf(token) + token.length());
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// remove the slash
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if (extra.startsWith("/")) {
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extra = extra.substring(1);
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}
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// is there anything left?
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if (extra.length() == 0) {
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extra = null;
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}
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}
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return extra;
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}
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/**
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* Parse the replication policy document out of the mime-multipart form data
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*
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* @return policy the encoded policy
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* @throws ServiceFailure
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* @throws InvalidRequest
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* @throws IOException
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* @throws InstantiationException
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* @throws IllegalAccessException
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* @throws JiBXException
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*/
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protected ReplicationPolicy collectReplicationPolicy()
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throws ServiceFailure, InvalidRequest, IOException, InstantiationException,
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IllegalAccessException, JiBXException {
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ReplicationPolicy policy = null;
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File tmpDir = getTempDirectory();
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MultipartRequest mr = null;
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Map<String, File> mmFileParts = null;
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File replPolicyFile = null;
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InputStream replPolicyStream = null;
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// Read the incoming data from its Mime Multipart encoding
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logMetacat.debug("Parsing ReplicationPolicy from the mime multipart entity");
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// handle MMP inputs
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MultipartRequestResolver mrr =
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new MultipartRequestResolver(tmpDir.getAbsolutePath(),1000000000, 0);
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try {
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mr = mrr.resolveMultipart(request);
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logMetacat.debug("Resolved the ReplicationPolicy multipart request.");
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} catch (IOException e) {
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throw new ServiceFailure("4882", "Couldn't resolve the multipart request: " +
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e.getMessage());
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} catch (FileUploadException e) {
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throw new ServiceFailure("4882", "Couldn't resolve the multipart request: " +
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e.getMessage());
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} catch (Exception e) {
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throw new ServiceFailure("4882", "Couldn't resolve the multipart request: " +
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e.getMessage());
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}
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// get the map of file parts
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mmFileParts = mr.getMultipartFiles();
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if ( mmFileParts == null || mmFileParts.keySet() == null) {
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throw new InvalidRequest("4883", "The multipart request must include " +
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"a file with the name 'policy'.");
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}
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multipartparams = mr.getMultipartParameters();
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replPolicyFile = mmFileParts.get("policy");
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if ( replPolicyFile == null ) {
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throw new InvalidRequest("4883", "The multipart request must include " +
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"a file with the name 'policy'.");
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}
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// deserialize the ReplicationPolicy
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replPolicyStream = new FileInputStream(replPolicyFile);
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policy = TypeMarshaller.unmarshalTypeFromStream(ReplicationPolicy.class, replPolicyStream);
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return policy;
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}
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/**
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* Parse the replica metadata document out of the mime-multipart form data
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*
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* @return replica the encoded replica
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* @throws ServiceFailure
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* @throws InvalidRequest
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* @throws IOException
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* @throws InstantiationException
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* @throws IllegalAccessException
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* @throws JiBXException
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*/
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protected Replica collectReplicaMetadata()
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throws ServiceFailure, InvalidRequest {
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Replica replica = null;
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File tmpDir = getTempDirectory();
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MultipartRequest mr = null;
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Map<String, File> mmFileParts = null;
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File replicaFile = null;
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InputStream replicaStream = null;
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// Read the incoming data from its Mime Multipart encoding
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logMetacat.debug("Parsing Replica from the mime multipart entity");
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// handle MMP inputs
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MultipartRequestResolver mrr =
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new MultipartRequestResolver(tmpDir.getAbsolutePath(),1000000000, 0);
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try {
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mr = mrr.resolveMultipart(request);
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logMetacat.debug("Resolved the Replica multipart request.");
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} catch (IOException e) {
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throw new ServiceFailure("4852", "Couldn't resolve the multipart request: " +
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e.getMessage());
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} catch (FileUploadException e) {
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throw new ServiceFailure("4852", "Couldn't resolve the multipart request: " +
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e.getMessage());
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} catch (Exception e) {
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throw new ServiceFailure("4852", "Couldn't resolve the multipart request: " +
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e.getMessage());
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}
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// get the map of file parts
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mmFileParts = mr.getMultipartFiles();
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if ( mmFileParts == null || mmFileParts.keySet() == null) {
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throw new InvalidRequest("4853", "The multipart request must include " +
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"a file with the name 'replicaMetadata'.");
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}
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multipartparams = mr.getMultipartParameters();
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replicaFile = mmFileParts.get("replicaMetadata");
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if ( replicaFile == null ) {
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throw new InvalidRequest("4853", "The multipart request must include " +
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"a file with the name 'replicaMetadata'.");
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}
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// deserialize the ReplicationPolicy
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try {
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replicaStream = new FileInputStream(replicaFile);
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} catch (FileNotFoundException e) {
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throw new ServiceFailure("4852", "Couldn't find the multipart file: " +
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e.getMessage());
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}
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try {
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replica = TypeMarshaller.unmarshalTypeFromStream(Replica.class, replicaStream);
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} catch (IOException e) {
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throw new ServiceFailure("4852", "Couldn't deserialize the replica document: " +
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e.getMessage());
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} catch (InstantiationException e) {
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throw new ServiceFailure("4852", "Couldn't deserialize the replica document: " +
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e.getMessage());
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} catch (IllegalAccessException e) {
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throw new ServiceFailure("4852", "Couldn't deserialize the replica document: " +
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e.getMessage());
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} catch (JiBXException e) {
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throw new ServiceFailure("4852", "Couldn't deserialize the replica document: " +
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e.getMessage());
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}
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return replica;
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}
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protected AccessPolicy collectAccessPolicy()
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throws IOException, ServiceFailure, InvalidRequest, JiBXException,
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InstantiationException, IllegalAccessException, ParserConfigurationException,
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SAXException {
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// Read the incoming data from its Mime Multipart encoding
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logMetacat.debug("Disassembling MIME multipart form");
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InputStream ap = null;
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// handle MMP inputs
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File tmpDir = getTempDirectory();
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logMetacat.debug("temp dir: " + tmpDir.getAbsolutePath());
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MultipartRequestResolver mrr =
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new MultipartRequestResolver(tmpDir.getAbsolutePath(), 1000000000, 0);
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MultipartRequest mr = null;
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try {
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mr = mrr.resolveMultipart(request);
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} catch (Exception e) {
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throw new ServiceFailure("2161",
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"Could not resolve multipart: " + e.getMessage());
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}
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logMetacat.debug("resolved multipart request");
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Map<String, File> files = mr.getMultipartFiles();
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if (files == null || files.keySet() == null) {
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throw new InvalidRequest("2163",
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"must have multipart file with name 'accessPolicy'");
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}
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logMetacat.debug("got multipart files");
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multipartparams = mr.getMultipartParameters();
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File apFile = files.get("accessPolicy");
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if (apFile == null) {
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throw new InvalidRequest("2163",
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"Missing the required file-part 'accessPolicy' from the multipart request.");
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}
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logMetacat.debug("apFile: " + apFile.getAbsolutePath());
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ap = new FileInputStream(apFile);
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AccessPolicy accessPolicy = TypeMarshaller.unmarshalTypeFromStream(AccessPolicy.class, ap);
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return accessPolicy;
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}
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384
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385
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protected SystemMetadata collectSystemMetadata()
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throws IOException, FileUploadException, ServiceFailure, InvalidRequest,
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387
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JiBXException, InstantiationException, IllegalAccessException {
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388
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389
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// Read the incoming data from its Mime Multipart encoding
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logMetacat.debug("Disassembling MIME multipart form");
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391
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InputStream sysmeta = null;
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392
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// handle MMP inputs
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File tmpDir = getTempDirectory();
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395
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logMetacat.debug("temp dir: " + tmpDir.getAbsolutePath());
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MultipartRequestResolver mrr =
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new MultipartRequestResolver(tmpDir.getAbsolutePath(), 1000000000, 0);
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398
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MultipartRequest mr = null;
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399
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try {
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mr = mrr.resolveMultipart(request);
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401
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} catch (Exception e) {
|
402
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throw new ServiceFailure("1202",
|
403
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"Could not resolve multipart: " + e.getMessage());
|
404
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}
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logMetacat.debug("resolved multipart request");
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Map<String, File> files = mr.getMultipartFiles();
|
407
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if (files == null) {
|
408
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throw new ServiceFailure("1202",
|
409
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"register meta must have multipart file with name 'sysmeta'");
|
410
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}
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411
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logMetacat.debug("got multipart files");
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412
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if (files.keySet() == null) {
|
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logMetacat.error("No file keys in MMP request.");
|
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throw new ServiceFailure(
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"1202",
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"No file keys found in MMP. "
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+ "register meta must have multipart file with name 'sysmeta'");
|
419
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}
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420
|
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421
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// for logging purposes, dump out the key-value pairs that
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422
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// constitute the request
|
423
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// 3 types exist: request params, multipart params, and
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424
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// multipart files
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425
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Iterator it = files.keySet().iterator();
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426
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logMetacat.debug("iterating through request parts: " + it);
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427
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while (it.hasNext()) {
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428
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String key = (String) it.next();
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429
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logMetacat.debug("files key: " + key);
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430
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logMetacat.debug("files value: " + files.get(key));
|
431
|
}
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432
|
|
433
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multipartparams = mr.getMultipartParameters();
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434
|
it = multipartparams.keySet().iterator();
|
435
|
while (it.hasNext()) {
|
436
|
String key = (String) it.next();
|
437
|
logMetacat.debug("multipartparams key: " + key);
|
438
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logMetacat.debug("multipartparams value: " + multipartparams.get(key));
|
439
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}
|
440
|
|
441
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it = params.keySet().iterator();
|
442
|
while (it.hasNext()) {
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443
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String key = (String) it.next();
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444
|
logMetacat.debug("param key: " + key);
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445
|
logMetacat.debug("param value: " + params.get(key));
|
446
|
}
|
447
|
logMetacat.debug("done iterating the request...");
|
448
|
|
449
|
File smFile = files.get("sysmeta");
|
450
|
if (smFile == null) {
|
451
|
throw new InvalidRequest("1102",
|
452
|
"Missing the required file-part 'sysmeta' from the multipart request.");
|
453
|
}
|
454
|
logMetacat.debug("smFile: " + smFile.getAbsolutePath());
|
455
|
sysmeta = new FileInputStream(smFile);
|
456
|
|
457
|
logMetacat.debug("Commence creation...");
|
458
|
SystemMetadata systemMetadata = TypeMarshaller.unmarshalTypeFromStream(SystemMetadata.class, sysmeta);
|
459
|
return systemMetadata;
|
460
|
}
|
461
|
|
462
|
protected Map<String, File> collectMultipartFiles()
|
463
|
throws ServiceFailure, InvalidRequest {
|
464
|
|
465
|
// Read the incoming data from its Mime Multipart encoding
|
466
|
logMetacat.debug("Disassembling MIME multipart form");
|
467
|
InputStream object = null;
|
468
|
InputStream sysmeta = null;
|
469
|
|
470
|
|
471
|
// handle MMP inputs
|
472
|
File tmpDir = getTempDirectory();
|
473
|
logMetacat.debug("temp dir: " + tmpDir.getAbsolutePath());
|
474
|
MultipartRequestResolver mrr =
|
475
|
new MultipartRequestResolver(tmpDir.getAbsolutePath(), 1000000000, 0);
|
476
|
MultipartRequest mr = null;
|
477
|
try {
|
478
|
mr = mrr.resolveMultipart(request);
|
479
|
} catch (Exception e) {
|
480
|
throw new ServiceFailure("1202",
|
481
|
"Could not resolve multipart files: " + e.getMessage());
|
482
|
}
|
483
|
logMetacat.debug("resolved multipart request");
|
484
|
Map<String, File> files = mr.getMultipartFiles();
|
485
|
if (files == null) {
|
486
|
throw new ServiceFailure("1202", "create/update must have multipart files with names 'object' and 'sysmeta'");
|
487
|
}
|
488
|
logMetacat.debug("got multipart files");
|
489
|
|
490
|
if (files.keySet() == null) {
|
491
|
logMetacat.error("No file keys in MMP request.");
|
492
|
throw new ServiceFailure("1202", "No file keys found in MMP. " +
|
493
|
"create/update must have multipart files with names 'object' and 'sysmeta'");
|
494
|
}
|
495
|
|
496
|
// for logging purposes, dump out the key-value pairs that constitute the request
|
497
|
// 3 types exist: request params, multipart params, and multipart files
|
498
|
Iterator it = files.keySet().iterator();
|
499
|
logMetacat.debug("iterating through files");
|
500
|
while (it.hasNext()) {
|
501
|
String key = (String)it.next();
|
502
|
logMetacat.debug("files key: " + key);
|
503
|
logMetacat.debug("files value: " + files.get(key));
|
504
|
}
|
505
|
|
506
|
multipartparams = mr.getMultipartParameters();
|
507
|
it = multipartparams.keySet().iterator();
|
508
|
logMetacat.debug("iterating through multipartparams");
|
509
|
while (it.hasNext()) {
|
510
|
String key = (String)it.next();
|
511
|
logMetacat.debug("multipartparams key: " + key);
|
512
|
logMetacat.debug("multipartparams value: " + multipartparams.get(key));
|
513
|
}
|
514
|
|
515
|
it = params.keySet().iterator();
|
516
|
logMetacat.debug("iterating through params");
|
517
|
while (it.hasNext()) {
|
518
|
String key = (String)it.next();
|
519
|
logMetacat.debug("param key: " + key);
|
520
|
logMetacat.debug("param value: " + params.get(key));
|
521
|
}
|
522
|
logMetacat.debug("done iterating the request...");
|
523
|
|
524
|
File smFile = files.get("sysmeta");
|
525
|
if (smFile == null) {
|
526
|
throw new InvalidRequest("1102", "Missing the required file-part 'sysmeta' from the multipart request.");
|
527
|
}
|
528
|
logMetacat.debug("smFile: " + smFile.getAbsolutePath());
|
529
|
File objFile = files.get("object");
|
530
|
if (objFile == null) {
|
531
|
throw new InvalidRequest("1102", "Missing the required file-part 'object' from the multipart request.");
|
532
|
}
|
533
|
logMetacat.debug("objectfile: " + objFile.getAbsolutePath());
|
534
|
|
535
|
return files;
|
536
|
}
|
537
|
|
538
|
/**
|
539
|
* copies request parameters to a hashtable which is given as argument to
|
540
|
* native metacathandler functions
|
541
|
*/
|
542
|
protected void initParams() {
|
543
|
|
544
|
String name = null;
|
545
|
String[] value = null;
|
546
|
Enumeration paramlist = request.getParameterNames();
|
547
|
while (paramlist.hasMoreElements()) {
|
548
|
name = (String) paramlist.nextElement();
|
549
|
value = request.getParameterValues(name);
|
550
|
params.put(name, value);
|
551
|
}
|
552
|
}
|
553
|
|
554
|
/**
|
555
|
* Collect the multipart params from the request
|
556
|
* @throws Exception
|
557
|
*/
|
558
|
protected void initMultipartParams() throws Exception {
|
559
|
|
560
|
// Read the incoming data from its Mime Multipart encoding
|
561
|
logMetacat.debug("Disassembling MIME multipart form");
|
562
|
|
563
|
// handle MMP inputs
|
564
|
File tmpDir = getTempDirectory();
|
565
|
logMetacat.debug("temp dir: " + tmpDir.getAbsolutePath());
|
566
|
MultipartRequestResolver mrr =
|
567
|
new MultipartRequestResolver(tmpDir.getAbsolutePath(), 1000000000, 0);
|
568
|
MultipartRequest mr = mrr.resolveMultipart(request);
|
569
|
|
570
|
multipartparams = mr.getMultipartParameters();
|
571
|
}
|
572
|
|
573
|
/**
|
574
|
* locate the boundary marker for an MMP
|
575
|
* @param is
|
576
|
* @return
|
577
|
* @throws IOException
|
578
|
*/
|
579
|
protected static String[] findBoundaryString(InputStream is)
|
580
|
throws IOException {
|
581
|
String[] endResult = new String[2];
|
582
|
String boundary = "";
|
583
|
String searchString = "boundary=";
|
584
|
byte[] b = new byte[1024];
|
585
|
int numbytes = is.read(b, 0, 1024);
|
586
|
|
587
|
while(numbytes != -1)
|
588
|
{
|
589
|
String s = new String(b, 0, numbytes);
|
590
|
int searchStringIndex = s.indexOf(searchString);
|
591
|
|
592
|
if(s.indexOf("\"", searchStringIndex + searchString.length() + 1) == -1)
|
593
|
{ //the end of the boundary is in the next byte array
|
594
|
boundary = s.substring(searchStringIndex + searchString.length() + 1, s.length());
|
595
|
}
|
596
|
else if(!boundary.startsWith("--"))
|
597
|
{ //we can read the whole boundary from this byte array
|
598
|
boundary = s.substring(searchStringIndex + searchString.length() + 1,
|
599
|
s.indexOf("\"", searchStringIndex + searchString.length() + 1));
|
600
|
boundary = "--" + boundary;
|
601
|
endResult[0] = boundary;
|
602
|
endResult[1] = s.substring(s.indexOf("\"", searchStringIndex + searchString.length() + 1) + 1,
|
603
|
s.length());
|
604
|
break;
|
605
|
}
|
606
|
else
|
607
|
{ //we're now reading the 2nd byte array to get the rest of the boundary
|
608
|
searchString = "\"";
|
609
|
searchStringIndex = s.indexOf(searchString);
|
610
|
boundary += s.substring(0, searchStringIndex);
|
611
|
boundary = "--" + boundary;
|
612
|
endResult[0] = boundary;
|
613
|
endResult[1] = s.substring(s.indexOf("\"", searchStringIndex + searchString.length() + 1) + 1,
|
614
|
s.length());
|
615
|
break;
|
616
|
}
|
617
|
}
|
618
|
return endResult;
|
619
|
}
|
620
|
|
621
|
/**
|
622
|
* return the directory where temp files are stored
|
623
|
* @return
|
624
|
*/
|
625
|
protected static File getTempDirectory()
|
626
|
{
|
627
|
File tmpDir = null;
|
628
|
Logger logMetacat = Logger.getLogger(D1ResourceHandler.class);
|
629
|
try {
|
630
|
tmpDir = new File(PropertyService.getProperty("application.tempDir"));
|
631
|
}
|
632
|
catch(PropertyNotFoundException pnfe) {
|
633
|
logMetacat.error("D1ResourceHandler.writeMMPPartstoFiles: " +
|
634
|
"application.tmpDir not found. Using /tmp instead.");
|
635
|
tmpDir = new File("/tmp");
|
636
|
}
|
637
|
return tmpDir;
|
638
|
}
|
639
|
|
640
|
/**
|
641
|
* Prints xml response
|
642
|
* @param message Message to be displayed
|
643
|
* @param response Servlet response that xml message will be printed
|
644
|
* */
|
645
|
protected void printError(String message, HttpServletResponse response) {
|
646
|
try {
|
647
|
logMetacat.error("D1ResourceHandler: Printing error to servlet response: " + message);
|
648
|
PrintWriter out = response.getWriter();
|
649
|
response.setContentType("text/xml");
|
650
|
out.println("<?xml version=\"1.0\"?>");
|
651
|
out.println("<error>");
|
652
|
out.println(message);
|
653
|
out.println("</error>");
|
654
|
out.close();
|
655
|
} catch (IOException e) {
|
656
|
e.printStackTrace();
|
657
|
}
|
658
|
}
|
659
|
|
660
|
/**
|
661
|
* serialize a D1 exception using jibx
|
662
|
* @param e
|
663
|
* @param out
|
664
|
*/
|
665
|
protected void serializeException(BaseException e, OutputStream out) {
|
666
|
// TODO: Use content negotiation to determine which return format to use
|
667
|
response.setContentType("text/xml");
|
668
|
response.setStatus(e.getCode());
|
669
|
|
670
|
logMetacat.error("D1ResourceHandler: Serializing exception with code " + e.getCode() + ": " + e.getMessage());
|
671
|
e.printStackTrace();
|
672
|
|
673
|
try {
|
674
|
IOUtils.write(e.serialize(BaseException.FMT_XML), out);
|
675
|
} catch (IOException e1) {
|
676
|
logMetacat.error("Error writing exception to stream. "
|
677
|
+ e1.getMessage());
|
678
|
}
|
679
|
}
|
680
|
|
681
|
}
|