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package dk.thoerup.traininfoservice;
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import java.io.BufferedReader;
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import java.io.ByteArrayOutputStream;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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public class RequestPlotter extends HttpServlet {
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private static final long serialVersionUID = 1L;
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static final Logger log = Logger.getLogger(RequestPlotter.class.getName());
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static final String KML = "application/vnd.google-earth.kml";
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static final String KMZ = "application/vnd.google-earth.kmz";
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protected String getKml() {
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StringBuilder sb = new StringBuilder();
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try {
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FileInputStream fis = new FileInputStream("/var/log/apache2/app_access.log");
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BufferedReader in = new BufferedReader( new InputStreamReader(fis) );
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sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
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sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
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sb.append( "<Document>\n" );
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String line;
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while ( (line=in.readLine()) != null) {
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if (line.indexOf("LocateStation") == -1 ){
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continue;
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}
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if (line.indexOf("latitude") == -1 ) {
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continue;
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}
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String toks[] = line.split(" ");
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String ip = toks[0];
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String time = toks[3].replace("[", "");
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String argpart = toks[6].split("\\?")[1];
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String args[] = argpart.split("&");
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String lat = args[0].split("=")[1];
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String lng = args[1].split("=")[1];
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sb.append( " <Placemark>\n" );
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sb.append( " <description>IP=" + ip + " Time=" + time + "</description>\n" );
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sb.append( " <Point><coordinates>" + lng + "," + lat + ",0</coordinates></Point>\n" );
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sb.append( " </Placemark>\n" );
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}
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sb.append( "</Document>\n" );
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sb.append( "</kml>\n" );
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} catch (Exception e) {
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sb.append("<!-- error -->");
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log.log(Level.SEVERE, "getKml()", e);
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}
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return sb.toString();
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}
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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String data = getKml();
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if (req.getParameter("zip") != null) {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ZipOutputStream zip = new ZipOutputStream(baos);
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zip.putNextEntry( new ZipEntry("trains.kml") );
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zip.write( data.getBytes() );
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zip.closeEntry();
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zip.close();
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byte bytes[] = baos.toByteArray();
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resp.setContentType(KMZ);
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resp.setContentLength( bytes.length );
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resp.getOutputStream().write(bytes);
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} else {
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resp.setContentType(KML);
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resp.getWriter().print( getKml() );
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}
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}
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}
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