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.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
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;

import dk.thoerup.traininfoservice.banedk.TimeoutMap;

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";
        
        Map<String,String> cache = new TimeoutMap<String,String>(2*60*1000);

        class RequestPosition {
                public String ip;
                public Date 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) );

                        SimpleDateFormat df = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss");

                        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 = df.parse( 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 (ParseException pe) {
                        log.log(Level.SEVERE, "parseException", pe);
                        throw new IOException(pe);
                } 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" );            
                
                
                sb.append( " <Style id=\"red\">\n" );
                sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href></Icon></IconStyle>\n" );
                sb.append( " </Style>\n");

                sb.append( " <Style id=\"yellow\">\n" );
                sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/ylw-circle.png</href></Icon></IconStyle>\n" );
                sb.append( " </Style>\n" );

                sb.append( " <Style id=\"green\">\n" );
                sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/grn-circle.png</href></Icon></IconStyle>\n" );
                sb.append( " </Style>\n\n" );
                
/*
                String overlay = 
              " <ScreenOverlay>" +
                " <name>Absolute Positioning: Top left</name>" +
                " <description>Absolute Positioning: Top left</description>" +
                " <visibility>1</visibility>" +
                "  <Icon>" +
                "   <href>http://code.google.com/apis/kml/documentation/top_left.jpg</href>" +
                "  </Icon>" +
                "  <overlayXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
                "  <screenXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
                "  <rotationXY x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
                "  <size x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
              " </ScreenOverlay>" ;
                
                sb.append(overlay);
        */      
                

                final String STYLE_GREEN = "green";
                final String STYLE_YELLOW = "yellow";
                final String STYLE_RED = "red";

                String oldstyle = null;
                Date now = new Date();
                for(RequestPosition current : list) {
                        
                        String style;
                        long timediff = now.getTime() - current.time.getTime();
                        
                        if ( timediff < (3*60*60*1000) ) {
                                style = STYLE_RED;
                        } else if ( timediff < (24*60*60*1000)) {
                                style = STYLE_YELLOW;
                        } else {
                                style = STYLE_GREEN;
                        }
                        
                        if (  !style.equals(oldstyle) ) {
                                if (oldstyle != null)                           
                                        sb.append( "</Folder>\n");
                                sb.append( "<Folder>\n");
                                sb.append( " <name>" ).append(style).append("</name>\n");
                                
                                oldstyle = style;
                        }
                        
                        sb.append( " <Placemark>\n" );
                        sb.append( "  <styleUrl>#" + style + "</styleUrl>\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( "</Folder>\n" );
                sb.append( "</Document>\n" );
                sb.append( "</kml>\n" );

                return sb.toString(); 
        }

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
                final String KEY = "kmldata";
                
                String kmlData = cache.get(KEY);
                
                if (kmlData == null) {
                        kmlData = formatXml( getRequestsFromFile() );
                        cache.put(KEY, kmlData);
                        kmlData += "<!-- from source -->";                      
                } else {
                        kmlData += "<!-- cached -->";
                }

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

                        ByteArrayOutputStream baos = new ByteArrayOutputStream();

                        ZipOutputStream zip = new ZipOutputStream(baos);
                        zip.putNextEntry( new ZipEntry("trains.kml") );
                        zip.write( kmlData.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( kmlData );
                }
        }
}
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.text.ParseException;
9	import java.text.SimpleDateFormat;
10	import java.util.ArrayList;
11	import java.util.Date;
12	import java.util.List;
13	import java.util.Map;
14	import java.util.logging.Level;
15	import java.util.logging.Logger;
16	import java.util.zip.ZipEntry;
17	import java.util.zip.ZipOutputStream;
18
19	import javax.servlet.ServletException;
20	import javax.servlet.http.HttpServlet;
21	import javax.servlet.http.HttpServletRequest;
22	import javax.servlet.http.HttpServletResponse;
23
24	import dk.thoerup.traininfoservice.banedk.TimeoutMap;
25
26	public class RequestPlotter extends HttpServlet {
27	private static final long serialVersionUID = 1L;
28
29	static final Logger log = Logger.getLogger(RequestPlotter.class.getName());
30
31	static final String KML = "application/vnd.google-earth.kml";
32	static final String KMZ = "application/vnd.google-earth.kmz";
33
34	Map<String,String> cache = new TimeoutMap<String,String>(2601000);
35
36	class RequestPosition {
37	public String ip;
38	public Date time;
39	public String lat;
40	public String lng;
41	}
42
43
44
45	protected List<RequestPosition> getRequestsFromFile() throws IOException{
46	List<RequestPosition> positions = new ArrayList<RequestPosition>();
47
48	try {
49	FileInputStream fis = new FileInputStream("/var/log/apache2/app_access.log");
50	BufferedReader in = new BufferedReader( new InputStreamReader(fis) );
51
52	SimpleDateFormat df = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss");
53
54	String line;
55	while ( (line=in.readLine()) != null) {
56	if (line.indexOf("LocateStation") == -1 ){
57	continue;
58	}
59
60	if (line.indexOf("latitude") == -1 ) {
61	continue;
62	}
63	RequestPosition pos = new RequestPosition();
64
65	String toks[] = line.split(" ");
66	pos.ip = toks[0];
67
68	pos.time = df.parse( toks[3].replace("[", "") );
69
70	String argpart = toks[6].split("\\?")[1];
71
72	String args[] = argpart.split("&");
73
74	pos.lat = args[0].split("=")[1];
75	pos.lng = args[1].split("=")[1];
76
77	positions.add(pos);
78	}
79	} catch (ParseException pe) {
80	log.log(Level.SEVERE, "parseException", pe);
81	throw new IOException(pe);
82	} catch (IOException e) {
83	log.log(Level.SEVERE, "getKml()", e);
84	throw e;
85	}
86
87	return positions;
88	}
89
90	protected String formatXml(List<RequestPosition> list) {
91	StringBuilder sb = new StringBuilder();
92
93	sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
94	sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
95	sb.append( "<Document>\n" );
96
97
98	sb.append( " <Style id=\"red\">\n" );
99	sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href></Icon></IconStyle>\n" );
100	sb.append( " </Style>\n");
101
102	sb.append( " <Style id=\"yellow\">\n" );
103	sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/ylw-circle.png</href></Icon></IconStyle>\n" );
104	sb.append( " </Style>\n" );
105
106	sb.append( " <Style id=\"green\">\n" );
107	sb.append( " <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/grn-circle.png</href></Icon></IconStyle>\n" );
108	sb.append( " </Style>\n\n" );
109
110	/*
111	String overlay =
112	" <ScreenOverlay>" +
113	" <name>Absolute Positioning: Top left</name>" +
114	" <description>Absolute Positioning: Top left</description>" +
115	" <visibility>1</visibility>" +
116	" <Icon>" +
117	" <href>http://code.google.com/apis/kml/documentation/top_left.jpg</href>" +
118	" </Icon>" +
119	" <overlayXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
120	" <screenXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
121	" <rotationXY x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
122	" <size x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
123	" </ScreenOverlay>" ;
124
125	sb.append(overlay);
126	*/
127
128
129	final String STYLE_GREEN = "green";
130	final String STYLE_YELLOW = "yellow";
131	final String STYLE_RED = "red";
132
133	String oldstyle = null;
134	Date now = new Date();
135	for(RequestPosition current : list) {
136
137	String style;
138	long timediff = now.getTime() - current.time.getTime();
139
140	if ( timediff < (36060*1000) ) {
141	style = STYLE_RED;
142	} else if ( timediff < (246060*1000)) {
143	style = STYLE_YELLOW;
144	} else {
145	style = STYLE_GREEN;
146	}
147
148	if ( !style.equals(oldstyle) ) {
149	if (oldstyle != null)
150	sb.append( "</Folder>\n");
151	sb.append( "<Folder>\n");
152	sb.append( " <name>" ).append(style).append("</name>\n");
153
154	oldstyle = style;
155	}
156
157	sb.append( " <Placemark>\n" );
158	sb.append( " <styleUrl>#" + style + "</styleUrl>\n" );
159	sb.append( " <description>IP=" + current.ip + " Time=" + current.time + "</description>\n" );
160	sb.append( " <Point><coordinates>" + current.lng + "," + current.lat + ",0</coordinates></Point>\n" );
161	sb.append( " </Placemark>\n" );
162	}
163	sb.append( "</Folder>\n" );
164	sb.append( "</Document>\n" );
165	sb.append( "</kml>\n" );
166
167	return sb.toString();
168	}
169
170	@Override
171	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
172	final String KEY = "kmldata";
173
174	String kmlData = cache.get(KEY);
175
176	if (kmlData == null) {
177	kmlData = formatXml( getRequestsFromFile() );
178	cache.put(KEY, kmlData);
179	kmlData += "<!-- from source -->";
180	} else {
181	kmlData += "<!-- cached -->";
182	}
183
184
185
186	if (req.getParameter("zip") != null) {
187
188	ByteArrayOutputStream baos = new ByteArrayOutputStream();
189
190	ZipOutputStream zip = new ZipOutputStream(baos);
191	zip.putNextEntry( new ZipEntry("trains.kml") );
192	zip.write( kmlData.getBytes() );
193	zip.closeEntry();
194	zip.close();
195
196	byte bytes[] = baos.toByteArray();
197
198	resp.setContentType(KMZ);
199	resp.setContentLength( bytes.length );
200	resp.getOutputStream().write(bytes);
201
202	} else {
203	resp.setContentType(KML);
204	resp.getWriter().print( kmlData );
205	}
206	}
207	}