package org.latinoware.geodojo.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.rmi.ServerException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import twitter4j.GeoLocation;
import twitter4j.PagableResponseList;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
/**
*
* @author ranophoenix
*/
public class GeoRSS extends HttpServlet {
private ArrayList<User> getFollowersUsers(Twitter twitter, String userName) {
PagableResponseList<User> tmp = null;
ArrayList<twitter4j.User> followersUsers = new ArrayList<User>();
long cursor = -1;
try {
tmp = twitter.getFollowersStatuses(userName, cursor);
while (tmp != null && !tmp.isEmpty()) {
followersUsers.addAll(tmp);
if (!tmp.hasNext()) {
break;
}
cursor = tmp.getNextCursor();
tmp = twitter.getFollowersStatuses(userName, cursor);
}
} catch (TwitterException e) {
return null;
}
return followersUsers;
}
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, TwitterException {
response.setContentType("text/xml;charset=UTF-8");
PrintWriter out = response.getWriter();
Twitter twitter = new TwitterFactory().getInstance();
List<User> followers = getFollowersUsers(twitter, "latinoware");
String template = "<entry>"
+ "<title>%s</title>"
+ "<link rel=\"alternate\" type=\"text/html\" href=\"%s\" />"
+ "<id>%s</id>"
+ "<updated>%s</updated>"
+ "<summary type=\"html\">%s</summary>"
+ "<geo:long>%s</geo:long>"
+ "<geo:lat>%st</geo:lat>"
+ "</entry>";
try {
out.println("<feed xmlns=\"http://www.w3.org/2005/Atom\" xmlns:geo=\"http://www.w3.org/2003/01/geo/wgs84_pos#\">");
out.println("<rights>GeoDoJo, All rights reserved.</rights>");
out.println("<title>GeoDojo</title>");
out.println("<link href=\"http://www.latinoware.org\"/> ");
out.println("<updated>2010-10-11T22:58:24-08:00</updated>");
out.println("<author><name>Rafael Soto e Robert Anderson</name></author>");
for (User follower : followers) {
if (follower.isGeoEnabled()) {
if (follower.getStatus() != null && follower.getStatus().getGeoLocation() != null) {
String title = "<img src=\"" + follower.getProfileImageURL().toString() + "\" />" + follower.getScreenName();
String alternate = follower.getProfileImageURL().toString();
String id = follower.getScreenName();
String updated = follower.getCreatedAt().toString();
String summary = follower.getDescription();
GeoLocation geo = follower.getStatus().getGeoLocation();
String lon = Double.toString(geo.getLongitude());
String lat = Double.toString(geo.getLatitude());
out.println(String.format(template, title, alternate, id, updated, summary, lon, lat));
}
}
}
out.println("</feed>");
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (TwitterException ex) {
throw new ServerException("TwitterException", ex);
}
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (TwitterException ex) {
throw new ServerException("TwitterException", ex);
}
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}