/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.exchange;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.InputStream;
import java.net.*;
import com.google.gson.*;
/**
*
* @author pakallis
*/
class Recv
{
private String lhs;
private String rhs;
private String error;
private String icc;
public Recv(
{
}
public String getLhs()
{
return lhs;
}
public String getRhs()
{
return rhs;
}
}
public class Convert extends HttpServlet {
/**
* 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 req, HttpServletResponse resp)
throws ServletException, IOException {
String query = "";
String amount = "";
String curTo = "";
String curFrom = "";
String submit = "";
String res = "";
HttpSession session;
resp.setContentType("text/html;charset=UTF-8");
PrintWriter out = resp.getWriter();
/*Read request parameters*/
amount = req.getParameter("amount");
curTo = req.getParameter("to");
curFrom = req.getParameter("from");
/*Open a connection to google and read the result*/
try {
query = "http://www.google.com/ig/calculator?hl=en&q=" + amount + curFrom + "=?" + curTo;
URL url = new URL(query);
InputStreamReader stream = new InputStreamReader(url.openStream());
BufferedReader in = new BufferedReader(stream);
String str = "";
String temp = "";
while ((temp = in.readLine()) != null) {
str = str + temp;
}
/*Parse the result which is in json format*/
Gson gson = new Gson();
Recv st = gson.fromJson(str, Recv.class);
String rhs = st.getRhs();
rhs = rhs.replaceAll("�", "");
/*we do the check in order to print the additional word(millions,billions etc)*/
StringTokenizer strto = new StringTokenizer(rhs);
String nextToken;
out.write(strto.nextToken());
nextToken = strto.nextToken();
if( nextToken.equals("million") || nextToken.equals("billion") || nextToken.equals("trillion"))
{
out.println(" "+nextToken);
}
} catch (NumberFormatException e) {
out.println("The given amount is not a valid number");
}
}
// <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 {
processRequest(request, response);
}
/**
* 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 {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}