001 /*
002 NGramJ - n-gram based text classification
003 Copyright (C) 2001 Frank S. Nestel (frank at spieleck.de)
004
005 This program is free software; you can redistribute it and/or modify
006 it under the terms of the GNU Lesser General Public License as published
007 by the Free Software Foundation; either version 2.1 of the License, or
008 (at your option) any later version.
009
010 This program is distributed in the hope that it will be useful,
011 but WITHOUT ANY WARRANTY; without even the implied warranty of
012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
013 GNU General Public License for more details.
014
015 You should have received a copy of the GNU Lesser General Public License
016 along with this program (lesser.txt); if not, write to the Free Software
017 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
018 */
019
020 package de.spieleck.app.ngramj.servlet;
021
022 import java.io.*;
023 import javax.servlet.*;
024 import javax.servlet.http.*;
025
026 import de.spieleck.app.ngramj.*;
027 import de.spieleck.app.ngramj.phoner.*;
028 import de.spieleck.app.ngramj.lm.LMDataProfile;
029
030 /**
031 * Mini-Application to create a "useful" word from
032 * a phonenumber.
033 */
034 public class PhoneServlet
035 extends HttpServlet
036 {
037 protected String basePath = "WEB-INF/lm";
038 protected String forcedReferer = null;
039
040 public PhoneServlet() { }
041
042 public void init()
043 {
044 String h;
045 h = getInitParameter("basePath");
046 if ( h != null )
047 basePath = h;
048 basePath = getServletConfig()
049 .getServletContext()
050 .getRealPath(basePath)+"/";
051 forcedReferer = getInitParameter("forcedReferer");
052
053 System.err.println("bp="+basePath);
054 }
055
056 public void doPost(HttpServletRequest req, HttpServletResponse res)
057 throws IOException
058 {
059 doGet(req,res);
060 }
061
062 public void doGet(HttpServletRequest req, HttpServletResponse res)
063 throws IOException
064 {
065 res.setContentType("text/plain");
066 PrintWriter out = res.getWriter();
067 if ( forcedReferer != null )
068 {
069 String referer = req.getHeader("Referer");
070 if ( !forcedReferer.equals(referer) )
071 {
072 out.println("Sorry! You came from "+referer+".");
073 out.println("This page is costly in terms of CPU time.");
074 out.println("You can only access via "+forcedReferer+".");
075 return;
076 }
077 }
078 String tel = req.getParameter("tel");
079 if ( tel.length() >= 9 )
080 {
081 out.println("Sorry! Your number is too long.");
082 out.println("The current implementation is costly in terms of CPU time.");
083 return;
084 }
085 String lang = req.getParameter("lang");
086 System.out.println("Using language resource "+lang+" on <"+tel+">("+tel.length()+").");
087 try
088 {
089 File ifi = new File(basePath+lang);
090 InputStream in = new FileInputStream(ifi);
091 IterableProfile prof = new LMDataProfile(lang, in);
092 //
093 Phoner p = new Phoner(prof, tel);
094 out.println("Using language resource "+lang);
095 p.show(out);
096 }
097 catch ( Exception e )
098 {
099 out.println("Error: "+e);
100 }
101 }
102 }