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1 package nabble.view.web.util;
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2
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3 import nabble.model.DailyNumber;
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4 import nabble.view.lib.Jtp;
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5 import org.slf4j.Logger;
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6 import org.slf4j.LoggerFactory;
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7
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8 import javax.servlet.ServletException;
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9 import javax.servlet.http.HttpServlet;
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10 import javax.servlet.http.HttpServletRequest;
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11 import javax.servlet.http.HttpServletResponse;
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12 import java.io.IOException;
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13
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14
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15 public final class VisitCounter extends HttpServlet {
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16 private static final Logger logger = LoggerFactory.getLogger(VisitCounter.class);
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17
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18 protected void service(HttpServletRequest request,HttpServletResponse response)
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19 throws ServletException, IOException
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20 {
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21 response.setHeader("Content-Type", "application/x-javascript" );
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22 Jtp.dontCache(response);
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23 String referrer = request.getParameter("referrer");
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24 logger.debug("VisitCounter referrer="+referrer);
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25 String url = request.getHeader("Referer");
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26 logger.debug("VisitCounter url="+url);
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27 countVisit( request, referrer, url );
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28 }
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29
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30 private static void countVisit(HttpServletRequest request,String referrer, String url) {
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31 DailyNumber.totalVisits.inc();
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32 if( referrer==null || referrer.equals("") ) {
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33 DailyNumber.directVisits.inc();
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34 } else if( isFromAd(url) ) {
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35 DailyNumber.adVisits.inc();
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36 } else if( isSearchEngine(referrer) ) {
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37 DailyNumber.searchEngineVisits.inc();
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38 } else {
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39 DailyNumber.externalVisits.inc();
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40 }
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41 }
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42
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43 private static boolean isFromAd(String url) {
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44 return url != null && url.indexOf("?keyword=") >= 0;
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45 }
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46
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47 // logic from _uOrg() in urchin.js
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48 private static boolean isSearchEngine(String referrer) {
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49 int i = referrer.indexOf("://");
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50 if( i == -1 )
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51 return false;
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52 String h = referrer.substring(i+3);
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53 if (h.indexOf("/") > -1) {
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54 h = h.substring(0,h.indexOf("/"));
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55 }
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56 for (SearchEngine se : searchEngines) {
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57 boolean isSearchEngine = h.indexOf(se.name) > -1;
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58 boolean isQuery = referrer.indexOf("?" + se.query + "=") > -1|| referrer.indexOf("&" + se.query + "=") > -1;
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59 if (isSearchEngine && isQuery)
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60 return true;
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61 }
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62 return false;
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63 }
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64
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65 private static final class SearchEngine {
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66 final String name;
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67 final String query;
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68
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69 SearchEngine(String name,String query) {
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70 this.name = name;
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71 this.query = query;
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72 }
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73 }
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74
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75 private static final SearchEngine[] searchEngines = new SearchEngine[]{
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76 new SearchEngine("google","q"),
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77 new SearchEngine("yahoo","p"),
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78 new SearchEngine("msn","q"),
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79 new SearchEngine("aol","query"),
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80 new SearchEngine("lycos","query"),
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81 new SearchEngine("ask","q"),
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82 new SearchEngine("altavista","q"),
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83 new SearchEngine("search","q"),
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84 new SearchEngine("netscape","query"),
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85 new SearchEngine("earthlink","q"),
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86 new SearchEngine("cnn","query"),
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87 new SearchEngine("looksmart","key"),
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88 new SearchEngine("about","terms"),
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89 new SearchEngine("excite","qkw"),
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90 new SearchEngine("mamma","query"),
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91 new SearchEngine("alltheweb","q"),
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92 new SearchEngine("gigablast","q"),
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93 new SearchEngine("voila","kw"),
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94 new SearchEngine("virgilio","qs"),
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95 new SearchEngine("teoma","q"),
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96 };
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97 }
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