gvsig-raster / org.gvsig.raster.wmts / trunk / org.gvsig.raster.wmts / org.gvsig.raster.wmts.ogc / org.gvsig.raster.wmts.ogc.impl / src / main / java / org / gvsig / raster / wmts / ogc / impl / base / WMTSProtocolHandler.java @ 1961
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.wmts.ogc.impl.base; |
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import java.io.BufferedOutputStream; |
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import java.io.ByteArrayInputStream; |
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import java.io.DataInputStream; |
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import java.io.DataOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.FileReader; |
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import java.io.IOException; |
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import java.net.HttpURLConnection; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.security.KeyManagementException; |
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import java.security.NoSuchAlgorithmException; |
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import java.util.ArrayList; |
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import java.util.Hashtable; |
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import java.util.List; |
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import java.util.StringTokenizer; |
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import java.util.prefs.Preferences; |
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import javax.net.ssl.HttpsURLConnection; |
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import javax.net.ssl.SSLContext; |
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import javax.net.ssl.TrustManager; |
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import javax.net.ssl.X509TrustManager; |
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import org.gvsig.compat.CompatLocator; |
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import org.gvsig.compat.net.Downloader; |
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import org.gvsig.compat.net.ICancellable; |
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import org.gvsig.raster.wmts.ogc.WMTSStatus; |
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import org.gvsig.raster.wmts.ogc.exception.DownloadException; |
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import org.gvsig.raster.wmts.ogc.exception.ServerErrorException; |
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import org.gvsig.raster.wmts.ogc.exception.WMTSException; |
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import org.gvsig.raster.wmts.ogc.impl.Tags; |
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import org.gvsig.raster.wmts.ogc.impl.Utilities; |
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import org.gvsig.raster.wmts.ogc.impl.request.WMTSGetCapabilitiesRequest; |
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import org.gvsig.raster.wmts.ogc.impl.request.WMTSGetFeatureInfoRequest; |
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import org.gvsig.raster.wmts.ogc.impl.request.WMTSGetTileRequest; |
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import org.gvsig.raster.wmts.ogc.struct.WMTSOperationsMetadata; |
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import org.kxml2.io.KXmlParser; |
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import org.xmlpull.v1.XmlPullParserException; |
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/**
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* <p> Abstract class that represents handlers to comunicate via WMS protocol.</p>
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public abstract class WMTSProtocolHandler { |
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protected static final Downloader downloader = CompatLocator.getDownloader(); |
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/**
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* Encoding used to parse different xml documents.
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*/
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protected String encoding = "UTF-8"; |
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private static int count = 0; |
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final String tempDirectoryPath = System.getProperty("java.io.tmpdir")+"/tmp-andami"; |
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protected boolean forceLongitudeFirstAxisOrder = false; |
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protected String name; |
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protected String version; |
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protected String host; |
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protected String port; |
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private WMTSServerDescription serverDescription = null; |
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protected abstract WMTSGetFeatureInfoRequest createGetFeatureInfoRequest(WMTSStatusImpl status, int x, int y); |
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protected abstract WMTSGetTileRequest createGetTileRequest(WMTSStatusImpl status); |
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protected abstract WMTSGetCapabilitiesRequest createGetCapabilitiesRequest(); |
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/**
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* parses the data retrieved by the Capabilities XML document
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*/
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public abstract boolean parseCapabilities(File f); |
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public WMTSServerDescription getServerDescription() {
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if(serverDescription == null) { |
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serverDescription = new WMTSServerDescription(getVersion());
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} |
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return this.serverDescription; |
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} |
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/**
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* @return Returns the host.
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*/
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public String getHost() { |
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return host;
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} |
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/**
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* @param host The host to set.
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*/
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public void setHost(String host) { |
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this.host = host;
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} |
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/**
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* @return Returns the name.
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*/
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public String getName() { |
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return name;
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} |
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/**
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* @param name The name to set.
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*/
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public void setName(String name) { |
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this.name = name;
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} |
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/**
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* @return Returns the port.
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*/
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public String getPort() { |
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return port;
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} |
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/**
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* @param port The port to set.
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*/
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public void setPort(String port) { |
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this.port = port;
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} |
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/**
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* @return Returns the version.
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*/
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public String getVersion() { |
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return version;
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} |
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/**
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* @param version The version to set.
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*/
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public void setVersion(String version) { |
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this.version = version;
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} |
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/**
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* Just for not repeat code. Gets the correct separator according
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* to the server URL
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* @param h
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* @return
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*/
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public String getSymbol(String h) { |
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String symbol;
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if (h.indexOf("?")==-1) |
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symbol = "?";
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else if (h.indexOf("?")!=h.length()-1) |
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symbol = "&";
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else
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symbol = "";
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return symbol;
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} |
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/**
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* Copy the file in a byte array
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* @param file
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* The file to copy
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* @return
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* An array of bytes
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* @throws IOException
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*/
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protected byte[] fileToBytes(File file) throws IOException { |
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FileInputStream fis = null; |
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byte[] bytes = null; |
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try{
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fis = new FileInputStream(file); |
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//long length = file.length();
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bytes = new byte[(int)file.length()]; |
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int offset = 0; |
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int numRead = 0; |
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while (offset < bytes.length &&
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(numRead = fis.read(bytes, offset, bytes.length-offset)) >= 0) {
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offset += numRead; |
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} |
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} catch (IOException e) { |
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throw e;
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} finally {
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if (fis != null) { |
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fis.close(); |
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} |
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} |
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return bytes;
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} |
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/**
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* Sets longitude first in the axis order read from the capabilities file
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* @param force
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*/
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public void setForceLongitudeFirstAxisOrder(boolean force) { |
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this.forceLongitudeFirstAxisOrder = force;
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} |
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//**************************************************************
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//Esto es temporal hasta que est? la cach?
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private Hashtable<URL, String> downloadedFiles; |
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/**
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* Returns the content of a URL as a file from the file system.<br>
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* <p>
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* If the URL has been already downloaded in this session and notified
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* to the system using the static <b>Utilities.addDownloadedURL(URL)</b>
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* method, it can be restored faster from the file system avoiding to
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* download it again.
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* </p>
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* @param url
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* @return File containing this URL's content or null if no file was found.
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*/
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private File getPreviousDownloaded(Object object) { |
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File f = null; |
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if (downloadedFiles != null && downloadedFiles.containsKey(object)) { |
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String filePath = (String) downloadedFiles.get(object); |
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f = new File(filePath); |
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if (!f.exists())
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return null; |
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} |
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return f;
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} |
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/**
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* Adds an URL to the table of downloaded files for further uses. If the URL
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* already exists in the table its filePath value is updated to the new one and
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* the old file itself is removed from the file system.
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*
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* @param url
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* @param filePath
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*/
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void addDownloadedURL(URL url, String filePath) { |
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if (downloadedFiles == null) |
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downloadedFiles = new Hashtable<URL, String>(); |
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downloadedFiles.put(url, filePath); |
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} |
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//Fin del c?digo temporal hasta que est? la cach?
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//**************************************************************
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public synchronized File getTile(WMTSStatusImpl status, ICancellable cancel, File file) throws ServerErrorException, WMTSException { |
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try {
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WMTSGetTileRequest request = createGetTileRequest(status); |
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request.sendRequest(cancel, file); |
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try {
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checkFileError(file); |
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} catch(WMTSException e) {
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file.delete(); |
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throw new WMTSException("This tile is not available:" + file.getAbsoluteFile().toString(), e); |
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} catch(IOException e) { |
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file.delete(); |
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throw new WMTSException("This tile is not available:" + file.getAbsoluteFile().toString(), e); |
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} |
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return file;
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} catch(IOException e) { |
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throw new WMTSException(e); |
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} |
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} |
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public synchronized File getTile(WMTSStatus status, ICancellable cancel) throws ServerErrorException, WMTSException { |
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try {
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WMTSGetTileRequest request = createGetTileRequest((WMTSStatusImpl)status); |
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File f = request.sendRequest(cancel);
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try {
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checkFileError(f); |
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} catch(WMTSException e) {
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downloader.removeURL(request); |
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throw new ServerErrorException(); |
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} |
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return f;
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} catch(IOException e) { |
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e.printStackTrace(); |
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throw new ServerErrorException(); |
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} |
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} |
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/**
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* Checks if the file downloaded is correct or doesn't
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* @param f
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* @throws WMTSException
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* @throws IOException
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*/
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private void checkFileError(File f) throws WMTSException, IOException { |
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if (f == null) |
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return;
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if (Utilities.isTextFile(f)) { |
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byte[] data = fileToBytes(f); |
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String exceptionMessage = parseException(data);
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if (exceptionMessage == null) { |
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String error = new String(data); |
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int pos = error.indexOf("<?xml"); |
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if (pos!= -1) { |
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String xml = error.substring(pos,error.length());
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exceptionMessage = parseException(xml.getBytes()); |
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} |
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if (exceptionMessage == null) |
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exceptionMessage = new String(data); |
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} |
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throw new WMTSException(exceptionMessage); |
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} |
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} |
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public synchronized URL getTileURL(WMTSStatusImpl status) throws MalformedURLException { |
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String onlineResource = getBaseURL(Tags.GETTILE);
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StringBuffer req = new StringBuffer(); |
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req.append(onlineResource) |
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.append("REQUEST=GetTile&SERVICE=WMTS&VERSION=").append(getVersion()).append("&") |
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.append("Layer=" + status.getLayer())
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.append("&Style=" + status.getStyle())
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.append("&Format=" + status.getFormat())
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.append("&TileMatrixSet=" + status.getTileMatrixSet())
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.append("&TileMatrix=" + status.getTileMatrix())
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.append("&TileRow=" + status. getTileRow())
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.append("&TileCol=" + status.getTileCol());
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return new URL(req.toString()); |
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} |
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/**
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* Gets the URL base for a operation (GetCapabilities, GetTile, ...)
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* @param operation
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* @return the base URL for the GET protocol or the host passed by the user
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* if it does not exists.
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*/
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public String getBaseURL(String operation) { |
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String onlineResource = null; |
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WMTSServerDescription svDescription = getServerDescription(); |
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if(svDescription != null) { |
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WMTSOperationsMetadata opMetadata = svDescription.getOperationsMetadata(); |
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if(opMetadata != null) |
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onlineResource = opMetadata.getOnlineResource(operation); |
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} |
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if(onlineResource == null) |
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onlineResource = getHost(); |
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String symbol = getSymbol(onlineResource);
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onlineResource = onlineResource + symbol; |
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return onlineResource;
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} |
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/**
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* Gets the URL base for a operation (GetCapabilities, GetTile, ...) and
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* a protocol GET or POST
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* @param operation
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* @return the base URL for this protocol or null if it does not exists.
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*/
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public String getBaseURL(String operation, int protocol) { |
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String onlineResource = null; |
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WMTSServerDescription svDescription = getServerDescription(); |
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if(svDescription != null) { |
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WMTSOperationsMetadata opMetadata = svDescription.getOperationsMetadata(); |
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if(opMetadata != null) { |
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onlineResource = opMetadata.getOnlineResource(operation, protocol); |
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if(onlineResource != null) { |
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String symbol = getSymbol(onlineResource);
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return onlineResource + symbol;
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} |
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} |
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} |
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return null; |
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} |
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/**
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* Gets a file name to download. I
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* @param url
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* @return
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*/
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private File getFile() { |
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count ++; |
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int index = name.lastIndexOf("."); |
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if (index > 0){ |
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return new File(tempDirectoryPath + "/" + name.substring(0,index) + System.currentTimeMillis() + count + |
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name.substring(index, name.length())); |
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} |
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return new File(tempDirectoryPath + "/" + name + System.currentTimeMillis() + count); |
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} |
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public synchronized File downloadFile(URL url, ICancellable cancel) throws DownloadException { |
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File f = null; |
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if((f = getPreviousDownloaded(url)) != null) |
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return f;
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Preferences prefs = Preferences.userRoot().node( "gvsig.downloader" ); |
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int IO_BUFFER_SIZE = 8 * 1024; |
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int timeout = prefs.getInt("timeout", 60000); |
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File dstFile = getFile();
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|
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DataOutputStream dos;
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try {
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DataInputStream is;
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//OutputStreamWriter os = null;
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HttpURLConnection connection = null; |
408 |
|
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if (url.getProtocol().equals("https")) { |
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disableHttsValidation(); |
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} |
412 |
connection = (HttpURLConnection)url.openConnection();
|
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connection.setConnectTimeout(timeout); |
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|
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is = new DataInputStream(url.openStream()); |
416 |
|
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dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(dstFile))); |
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byte[] buffer = new byte[IO_BUFFER_SIZE]; |
419 |
|
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int read;
|
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while ((read = is.read(buffer)) != -1) { |
422 |
dos.write(buffer, 0, read);
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} |
424 |
|
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/*if(os != null) {
|
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os.close();
|
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}*/
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dos.close(); |
429 |
is.close(); |
430 |
is = null;
|
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dos = null;
|
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if (cancel != null && cancel.isCanceled()) { |
433 |
dstFile.delete(); |
434 |
dstFile = null;
|
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return null; |
436 |
} |
437 |
} catch (Exception e) { |
438 |
throw new DownloadException(e); |
439 |
} |
440 |
addDownloadedURL(url, dstFile.getAbsolutePath()); |
441 |
return dstFile;
|
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} |
443 |
|
444 |
/**
|
445 |
* This method disables the Https certificate validation.
|
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* @throws KeyManagementException
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447 |
* @throws NoSuchAlgorithmException
|
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*/
|
449 |
private void disableHttsValidation() throws KeyManagementException, NoSuchAlgorithmException{ |
450 |
// Create a trust manager that does not validate certificate chains
|
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TrustManager[] trustAllCerts = new TrustManager[] { |
452 |
new X509TrustManager() { |
453 |
public java.security.cert.X509Certificate[] getAcceptedIssuers() { |
454 |
return null; |
455 |
} |
456 |
public void checkClientTrusted( |
457 |
java.security.cert.X509Certificate[] certs, String authType) { |
458 |
} |
459 |
public void checkServerTrusted( |
460 |
java.security.cert.X509Certificate[] certs, String authType) { |
461 |
} |
462 |
} |
463 |
}; |
464 |
|
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// Install the all-trusting trust manager
|
466 |
SSLContext sc = SSLContext.getInstance("SSL"); |
467 |
sc.init(null, trustAllCerts, new java.security.SecureRandom()); |
468 |
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
|
469 |
} |
470 |
|
471 |
/**
|
472 |
* <p>It will send a GetFeatureInfo request to the WMTS
|
473 |
* Parsing the response and redirecting the info to the WMTS client</p>
|
474 |
* TODO: return a stored file instead a String.
|
475 |
*/
|
476 |
public String getFeatureInfo(WMTSStatusImpl status, int x, int y, ICancellable cancel) { |
477 |
StringBuffer output = new StringBuffer(); |
478 |
String outputFormat = new String(); |
479 |
String ServiceException = "ServiceExceptionReport"; |
480 |
StringBuffer sb = new StringBuffer(); |
481 |
sb.append("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>");
|
482 |
try {
|
483 |
WMTSGetFeatureInfoRequest request = createGetFeatureInfoRequest(status, x, y); |
484 |
URL url = request.getURL();
|
485 |
outputFormat = url.openConnection().getContentType(); |
486 |
File f = request.sendRequest(cancel);
|
487 |
if (f == null) { |
488 |
return ""; |
489 |
} |
490 |
|
491 |
FileReader fReader = new FileReader(f); |
492 |
char[] buffer = new char[1024*256]; |
493 |
for (int i = fReader.read(buffer);i > 0;i = fReader.read(buffer)) { |
494 |
String str = new String(buffer, 0, i); |
495 |
output.append(str); |
496 |
} |
497 |
fReader.close(); |
498 |
if ( (outputFormat == null) || (outputFormat.indexOf("xml") != -1) |
499 |
||output.toString().toLowerCase().startsWith("<?xml")
|
500 |
||(outputFormat.indexOf("gml") != -1)) { |
501 |
KXmlParser kxmlParser = null;
|
502 |
kxmlParser = new KXmlParser();
|
503 |
//kxmlParser.setInput(new StringReader(output.toString()));
|
504 |
kxmlParser.setInput(new FileReader(f)); |
505 |
|
506 |
kxmlParser.nextTag(); |
507 |
if (kxmlParser.getName().compareTo(ServiceException) == 0) { |
508 |
sb.append("<INFO>").append(parseException( output.toString().getBytes())).append("</INFO>"); |
509 |
return sb.toString();
|
510 |
} else if (kxmlParser.getName().compareToIgnoreCase("ERROR") == 0) { |
511 |
return output.toString();
|
512 |
} else {
|
513 |
return output.toString();
|
514 |
} |
515 |
} else {
|
516 |
return output.toString();
|
517 |
} |
518 |
} catch(XmlPullParserException parserEx) {
|
519 |
if (output.toString().toLowerCase().indexOf("xml") != -1) { |
520 |
return output.toString().trim();
|
521 |
} else {
|
522 |
sb.append("<INFO>").append("Info format not supported").append("</INFO>"); |
523 |
return sb.toString();
|
524 |
} |
525 |
} catch(Exception e) { |
526 |
e.printStackTrace(); |
527 |
sb.append("<INFO>").append("Info format not supported").append("</INFO>"); |
528 |
return sb.toString();
|
529 |
} |
530 |
} |
531 |
|
532 |
/**
|
533 |
* <p>Builds a GetCapabilities request that is sent to the WMS
|
534 |
* the response will be parse to extract the data needed by the
|
535 |
* WMS client</p>
|
536 |
* @param override, if true the previous downloaded data will be overridden
|
537 |
*/
|
538 |
public void getCapabilities(WMTSServerDescription status, boolean override, ICancellable cancel) { |
539 |
try {
|
540 |
serverDescription = status; |
541 |
WMTSGetCapabilitiesRequest request = createGetCapabilitiesRequest(); |
542 |
File f = request.sendRequest(cancel);
|
543 |
|
544 |
if (f == null) |
545 |
return;
|
546 |
parseCapabilities(f); |
547 |
} catch(Exception e) { |
548 |
e.printStackTrace(); |
549 |
} |
550 |
} |
551 |
|
552 |
|
553 |
/**
|
554 |
* Builds the GetCapabilitiesRequest according to the OGC WMS Specifications
|
555 |
* without a VERSION, to get the highest version than a WMS supports.
|
556 |
*/
|
557 |
public static String buildCapabilitiesSuitableVersionRequest(String _host, String _version) { |
558 |
int index = _host.indexOf('?'); |
559 |
|
560 |
if (index > -1) { |
561 |
String host = _host.substring(0, index + 1); |
562 |
String query = _host.substring(index + 1, _host.length()); |
563 |
|
564 |
StringTokenizer tokens = new StringTokenizer(query, "&"); |
565 |
String newQuery = "", token; |
566 |
|
567 |
// If there is a field or a value with spaces, (and then it's on different tokens) -> unify them
|
568 |
while (tokens.hasMoreTokens()) {
|
569 |
token = tokens.nextToken().trim(); |
570 |
|
571 |
if (token.toUpperCase().compareTo("REQUEST=GETCAPABILITIES") == 0) |
572 |
continue;
|
573 |
|
574 |
if (token.toUpperCase().compareTo("SERVICE=WMTS") == 0) |
575 |
continue;
|
576 |
|
577 |
if ((_version != null) && (_version.length() > 0)) { |
578 |
if (token.toUpperCase().compareTo("VERSION=" + _version) == 0) |
579 |
continue;
|
580 |
} |
581 |
|
582 |
if (token.toUpperCase().compareTo("EXCEPTIONS=XML") == 0) |
583 |
continue;
|
584 |
|
585 |
newQuery += token + "&";
|
586 |
} |
587 |
|
588 |
_host = host + newQuery; |
589 |
} |
590 |
else {
|
591 |
_host += "?";
|
592 |
} |
593 |
|
594 |
if ((_version != null) && (_version.compareTo("") != 0)) |
595 |
_host += "REQUEST=GetCapabilities&SERVICE=WMTS&VERSION=" + _version;
|
596 |
else
|
597 |
_host += "REQUEST=GetCapabilities&SERVICE=WMTS";
|
598 |
|
599 |
return _host;
|
600 |
} |
601 |
|
602 |
protected String parseException(byte[] data) throws IOException { |
603 |
List<String> errors = new ArrayList<String>(); |
604 |
KXmlParser kxmlParser = new KXmlParser();
|
605 |
try
|
606 |
{ |
607 |
kxmlParser.setInput(new ByteArrayInputStream(data), encoding); |
608 |
kxmlParser.nextTag(); |
609 |
int tag;
|
610 |
if ( kxmlParser.getEventType() != KXmlParser.END_DOCUMENT )
|
611 |
{ |
612 |
kxmlParser.require(KXmlParser.START_TAG, null, Tags.EXCEPTION_ROOT);
|
613 |
tag = kxmlParser.nextTag(); |
614 |
while(tag != KXmlParser.END_DOCUMENT)
|
615 |
{ |
616 |
switch(tag)
|
617 |
{ |
618 |
case KXmlParser.START_TAG:
|
619 |
if (kxmlParser.getName().compareTo(Tags.SERVICE_EXCEPTION)==0){ |
620 |
String errorCode = kxmlParser.getAttributeValue("", Tags.CODE); |
621 |
errorCode = (errorCode != null) ? "["+errorCode+"] " : ""; |
622 |
String errorMessage = kxmlParser.nextText();
|
623 |
errors.add(errorCode + errorMessage); |
624 |
} |
625 |
break;
|
626 |
case KXmlParser.END_TAG:
|
627 |
break;
|
628 |
|
629 |
} |
630 |
tag = kxmlParser.nextTag(); |
631 |
} |
632 |
//kxmlParser.require(KXmlParser.END_DOCUMENT, null, null);
|
633 |
} |
634 |
} |
635 |
catch(XmlPullParserException parser_ex){
|
636 |
throw new IOException(parser_ex.getMessage()); |
637 |
} |
638 |
|
639 |
String message = errors.size() > 0? "" : null; |
640 |
for (int i = 0; i < errors.size(); i++) { |
641 |
message += (String) errors.get(i)+"\n"; |
642 |
} |
643 |
return message;
|
644 |
} |
645 |
|
646 |
} |