thoerup/traininfoservice/RequestPlotter.java

package dk.thoerup.traininfoservice;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class RequestPlotter extends HttpServlet {
        private static final long serialVersionUID = 1L;

        static final Logger log = Logger.getLogger(RequestPlotter.class.getName());

        static final String KML = "application/vnd.google-earth.kml";
        static final String KMZ = "application/vnd.google-earth.kmz";

        class RequestPosition {
                public String ip;
                public String time;
                public String lat;
                public String lng;
        }


        protected List<RequestPosition> getRequestsFromFile() throws IOException{
                List<RequestPosition> positions = new ArrayList<RequestPosition>();

                try {
                        FileInputStream fis = new FileInputStream("/var/log/apache2/app_access.log");
                        BufferedReader in = new BufferedReader( new InputStreamReader(fis) );

                        String line;
                        while ( (line=in.readLine()) != null) {
                                if (line.indexOf("LocateStation") == -1 ){
                                        continue;
                                }

                                if (line.indexOf("latitude") == -1 ) {
                                        continue;
                                }
                                RequestPosition pos = new RequestPosition();

                                String toks[] = line.split(" ");
                                pos.ip = toks[0];
                                pos.time = toks[3].replace("[", "");
                                String argpart = toks[6].split("\\?")[1];

                                String args[] = argpart.split("&");

                                pos.lat = args[0].split("=")[1];
                                pos.lng = args[1].split("=")[1];
                                
                                positions.add(pos);
                        }
                } catch (IOException e) {
                        log.log(Level.SEVERE, "getKml()", e);
                        throw e;
                }

                return positions;
        }

        protected String formatXml(List<RequestPosition> list) {
                StringBuilder sb = new StringBuilder();

                sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
                sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
                sb.append( "<Document>\n" );            

                for(RequestPosition current : list) {
                        sb.append( " <Placemark>\n" );
                        sb.append( "  <description>IP=" + current.ip + "  Time=" + current.time + "</description>\n" );
                        sb.append( "  <Point><coordinates>" + current.lng + "," + current.lat + ",0</coordinates></Point>\n" );
                        sb.append( " </Placemark>\n" );                 
                }

                sb.append(  "</Document>\n" );
                sb.append( "</kml>\n" );

                return sb.toString(); 
        }

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

                String data = formatXml( getRequestsFromFile() );

                if (req.getParameter("zip") != null) {

                        ByteArrayOutputStream baos = new ByteArrayOutputStream();

                        ZipOutputStream zip = new ZipOutputStream(baos);
                        zip.putNextEntry( new ZipEntry("trains.kml") );
                        zip.write( data.getBytes() );
                        zip.closeEntry();
                        zip.close();

                        byte bytes[] = baos.toByteArray();

                        resp.setContentType(KMZ);
                        resp.setContentLength( bytes.length );
                        resp.getOutputStream().write(bytes);

                } else {
                        resp.setContentType(KML);
                        resp.getWriter().print( data );
                }
        }
}
1	package dk.thoerup.traininfoservice;
2
3	import java.io.BufferedReader;
4	import java.io.ByteArrayOutputStream;
5	import java.io.FileInputStream;
6	import java.io.IOException;
7	import java.io.InputStreamReader;
8	import java.util.ArrayList;
9	import java.util.List;
10	import java.util.logging.Level;
11	import java.util.logging.Logger;
12	import java.util.zip.ZipEntry;
13	import java.util.zip.ZipOutputStream;
14
15	import javax.servlet.ServletException;
16	import javax.servlet.http.HttpServlet;
17	import javax.servlet.http.HttpServletRequest;
18	import javax.servlet.http.HttpServletResponse;
19
20	public class RequestPlotter extends HttpServlet {
21	private static final long serialVersionUID = 1L;
22
23	static final Logger log = Logger.getLogger(RequestPlotter.class.getName());
24
25	static final String KML = "application/vnd.google-earth.kml";
26	static final String KMZ = "application/vnd.google-earth.kmz";
27
28	class RequestPosition {
29	public String ip;
30	public String time;
31	public String lat;
32	public String lng;
33	}
34
35
36
37	protected List<RequestPosition> getRequestsFromFile() throws IOException{
38	List<RequestPosition> positions = new ArrayList<RequestPosition>();
39
40	try {
41	FileInputStream fis = new FileInputStream("/var/log/apache2/app_access.log");
42	BufferedReader in = new BufferedReader( new InputStreamReader(fis) );
43
44	String line;
45	while ( (line=in.readLine()) != null) {
46	if (line.indexOf("LocateStation") == -1 ){
47	continue;
48	}
49
50	if (line.indexOf("latitude") == -1 ) {
51	continue;
52	}
53	RequestPosition pos = new RequestPosition();
54
55	String toks[] = line.split(" ");
56	pos.ip = toks[0];
57	pos.time = toks[3].replace("[", "");
58	String argpart = toks[6].split("\\?")[1];
59
60	String args[] = argpart.split("&");
61
62	pos.lat = args[0].split("=")[1];
63	pos.lng = args[1].split("=")[1];
64
65	positions.add(pos);
66	}
67	} catch (IOException e) {
68	log.log(Level.SEVERE, "getKml()", e);
69	throw e;
70	}
71
72	return positions;
73	}
74
75	protected String formatXml(List<RequestPosition> list) {
76	StringBuilder sb = new StringBuilder();
77
78	sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
79	sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
80	sb.append( "<Document>\n" );
81
82	for(RequestPosition current : list) {
83	sb.append( " <Placemark>\n" );
84	sb.append( " <description>IP=" + current.ip + " Time=" + current.time + "</description>\n" );
85	sb.append( " <Point><coordinates>" + current.lng + "," + current.lat + ",0</coordinates></Point>\n" );
86	sb.append( " </Placemark>\n" );
87	}
88
89	sb.append( "</Document>\n" );
90	sb.append( "</kml>\n" );
91
92	return sb.toString();
93	}
94
95	@Override
96	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
97
98	String data = formatXml( getRequestsFromFile() );
99
100	if (req.getParameter("zip") != null) {
101
102	ByteArrayOutputStream baos = new ByteArrayOutputStream();
103
104	ZipOutputStream zip = new ZipOutputStream(baos);
105	zip.putNextEntry( new ZipEntry("trains.kml") );
106	zip.write( data.getBytes() );
107	zip.closeEntry();
108	zip.close();
109
110	byte bytes[] = baos.toByteArray();
111
112	resp.setContentType(KMZ);
113	resp.setContentLength( bytes.length );
114	resp.getOutputStream().write(bytes);
115
116	} else {
117	resp.setContentType(KML);
118	resp.getWriter().print( data );
119	}
120	}
121	}