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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.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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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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class RequestPosition {
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public String ip;
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public Date time;
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public String lat;
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public String lng;
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}
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protected List<RequestPosition> getRequestsFromFile() throws IOException{
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List<RequestPosition> positions = new ArrayList<RequestPosition>();
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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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SimpleDateFormat df = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss");
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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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RequestPosition pos = new RequestPosition();
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String toks[] = line.split(" ");
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pos.ip = toks[0];
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pos.time = df.parse( 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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pos.lat = args[0].split("=")[1];
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pos.lng = args[1].split("=")[1];
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positions.add(pos);
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}
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} catch (ParseException pe) {
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log.log(Level.SEVERE, "parseException", pe);
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throw new IOException(pe);
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} catch (IOException e) {
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log.log(Level.SEVERE, "getKml()", e);
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throw e;
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}
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return positions;
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}
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protected String formatXml(List<RequestPosition> list) {
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StringBuilder sb = new StringBuilder();
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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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sb.append( " <Style id=\"red\">\n" );
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sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href></Icon></IconStyle>\n" );
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sb.append( " </Style>\n");
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sb.append( " <Style id=\"yellow\">\n" );
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sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/ylw-circle.png</href></Icon></IconStyle>\n" );
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sb.append( " </Style>\n" );
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sb.append( " <Style id=\"green\">\n" );
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sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/grn-circle.png</href></Icon></IconStyle>\n" );
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sb.append( " </Style>\n\n" );
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Date now = new Date();
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for(RequestPosition current : list) {
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String style;
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long timediff = now.getTime() - current.time.getTime();
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if ( timediff < (3*60*60*1000) ) {
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style = "#red";
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} else if ( timediff < (24*60*60*1000)) {
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style = "#yellow";
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} else {
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style = "#green";
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}
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sb.append( " <Placemark>\n" );
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sb.append( " <styleUrl>" + style + "</styleUrl>\n" );
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sb.append( " <description>IP=" + current.ip + " Time=" + current.time + "</description>\n" );
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sb.append( " <Point><coordinates>" + current.lng + "," + current.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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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 = formatXml( getRequestsFromFile() );
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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( data );
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}
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}
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}
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