Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2009 Iver T.I.  {{Task}}

 */

/**

 * This class sends a WMS request and returns the

 * reply in a local File. It tries if the server

 * supports both HTTP Get and Post requests.

 * @author Jorge Piera LLodr? (jorge.piera@iver.es)

 */

package org.gvsig.remoteclient.wmts.request;

import java.io.BufferedOutputStream;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.ConnectException;

import java.net.HttpURLConnection;

import java.net.SocketTimeoutException;

import java.net.URL;

import java.net.UnknownHostException;

import java.security.KeyManagementException;

import java.security.NoSuchAlgorithmException;

import java.util.prefs.Preferences;

import javax.net.ssl.HttpsURLConnection;

import javax.net.ssl.SSLContext;

import javax.net.ssl.TrustManager;

import javax.net.ssl.X509TrustManager;

import org.gvsig.compat.CompatLocator;

import org.gvsig.compat.lang.StringUtils;

import org.gvsig.compat.net.ICancellable;

import org.gvsig.remoteclient.RemoteClientStatus;

import org.gvsig.remoteclient.ogc.request.OGCRequest;

import org.gvsig.remoteclient.wmts.WMTSProtocolHandler;

import org.gvsig.remoteclient.wmts.WMTSStatus;

/**

 * Base class for a WMTS request

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public abstract class WMTSRequest extends OGCRequest {

        protected static final StringUtils stringUtils = CompatLocator.getStringUtils();

        public WMTSRequest(RemoteClientStatus status,

                        WMTSProtocolHandler protocolHandler) {

                super(status, protocolHandler);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.remoteClient.wfs.requests.WFSRequest#getSchemaLocation()

         */

        protected String getSchemaLocation() {

                return null;

        }

        /**

     * Gets the part of the OGC request that share GetMap and GetFeatureInfo

     * @return String request

     */

        protected String getPartialQuery(WMTSStatus status) {

        StringBuffer req = new StringBuffer();

        req.append("Layer=" + status.getLayer())

        .append("&Style=" + status.getStyle())

        .append("&Format=" + status.getFormat())

        .append("&TileMatrixSet=" + status.getTileMatrixSet())

        .append("&TileMatrix=" + status.getTileMatrix())

        .append("&TileRow=" + status. getTileRow())

        .append("&TileCol=" + status.getTileCol());

        return req.toString();

    }

        /**

         * Send a request to the server.

         * @return

         * The server reply

         * @throws IOException 

         * @throws UnknownHostException 

         * @throws ConnectException 

         */

        public void sendRequest(ICancellable cancel, File file) throws ConnectException, UnknownHostException, IOException {

                String onlineResource = protocolHandler.getHost();

                String symbol = getSymbol(onlineResource);

                onlineResource = onlineResource + symbol;

                URL url = new URL(stringUtils.replaceAll(getHttpGetRequest(onlineResource), " ", "%20"));

                //System.out.println(url.toString());

                downloadFile(url, file, cancel);        

                //downloadFile(new URL(protocolHandler.getHost()), getHttpGetRequest(onlineResource), file, cancel);        

        }

        public void cancelDownload() {

                if(connection != null) {

                        connection.disconnect();

                        connection = null;        

                }

                if(is != null) {

                        try {

                                is.close();

                        } catch (IOException e) {

                        }

                }

                if(dos != null) {

                        try {

                                dos.close();

                        } catch (IOException e) {

                        }

                }

        }

        HttpURLConnection connection = null;

        DataOutputStream dos = null;

        DataInputStream is = null;

        public void downloadFile(URL url, File dstFile, ICancellable cancel) throws IOException {

                if(cancel != null && cancel.isCanceled())

                        throw new IOException();

                Preferences prefs = Preferences.userRoot().node( "gvsig.downloader" );

                // by default 1 minute (60000 milliseconds.

                int timeout = prefs.getInt("timeout", 20000);

                //If the used protocol is HTTPS

                if (url.getProtocol().equals("https")) {

                        try {

                                disableHttsValidation();

                        } catch (KeyManagementException e) {

                                throw new IOException();

                        } catch (NoSuchAlgorithmException e) {

                                throw new IOException();

                        }

                }

                try {

                        connection = (HttpURLConnection)url.openConnection();

                        connection.setConnectTimeout(timeout);

                        connection.setReadTimeout(timeout);

                        is = new DataInputStream(connection.getInputStream());

                        dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(dstFile)));

                        byte[] buffer = new byte[4096];

                        int i = -1;

                        if(cancel != null && cancel.isCanceled()) {

                                throw new IOException();

                        }

                        while((i = is.read(buffer)) > 0) {

                                if(cancel != null && cancel.isCanceled()) {

                                        throw new IOException();

                                }

                                dos.write(buffer, 0, i);

                        }

                } catch (SocketTimeoutException e) {

                        throw new IOException();

                } finally {

                        if(is != null)

                                is.close();

                        if(dos != null)

                                dos.close();

                        if(connection != null)

                                connection.disconnect();

                }

        }

        /**

         * This method disables the Https certificate validation.

         * @throws KeyManagementException

         * @throws NoSuchAlgorithmException

         */

        private void disableHttsValidation() throws KeyManagementException, NoSuchAlgorithmException{

                // Create a trust manager that does not validate certificate chains

                TrustManager[] trustAllCerts = new TrustManager[] {

                                new X509TrustManager() {

                                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {

                                                return null;

                                        }

                                        public void checkClientTrusted(

                                                        java.security.cert.X509Certificate[] certs, String authType) {

                                        }

                                        public void checkServerTrusted(

                                                        java.security.cert.X509Certificate[] certs, String authType) {

                                        }

                                }

                };

                // Install the all-trusting trust manager

                SSLContext sc = SSLContext.getInstance("SSL");

                sc.init(null, trustAllCerts, new java.security.SecureRandom());

                HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

        }

}