package group2.shenyang;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/***************************************************************************
Name: RetrieveMail.java
Input:
3 parameters from POP.java by using Cookies
> user: username
> pass: password
> host: hostname
> 1 parameter from POP.java by querystring
> mail: which msg to get
>
> Functionality:
> - Fetches cookies & the mail parameter
> - Logs into the POP server
> - Retrieves the appropriate msg
> - Bold the fields Subject, From, To, and Date
> - Logs out the server
>
> Output:
> The appropriate email
>
> Error Checks:
> Same as POP.java
> ****************************************************************************/
public class RetrieveMail extends HttpServlet{
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException{
res.setContentType("text/html");
ServletOutputStream out=res.getOutputStream();
try{
// Determine fields + Get Cookies
Cookie[] cookie=new Cookie[3];
String[] name=new String[3];
String user="blah", pass="blah", host="blah";
cookie=req.getCookies();
for(int j=0; j<=2; j++){
name[j]=cookie[j].getName();
if (name[j].equals("hostname")){
host=cookie[j].getValue();
}
else if (name[j].equals("password")){
pass=cookie[j].getValue();
}
else if (name[j].equals("username")){
user=cookie[j].getValue();
}
}
String mail=req.getParameter("mail");
// Create socket and log in
Socket sock=new Socket(host, 110);
PrintStream in_sock=new PrintStream(sock.getOutputStream());
DataInputStream out_sock=new DataInputStream(sock.getInputStream());
String pop_res;
pop_res=out_sock.readLine();
if (! pop_res.startsWith("+OK")){
throw new ServletException("POP3 Server Not Ready");
}
in_sock.println("USER "+user);
pop_res=out_sock.readLine();
if (! pop_res.startsWith("+OK")){
throw new ServletException("Incorrect Username");
}
in_sock.println("PASS "+pass);
pop_res=out_sock.readLine();
if (! pop_res.startsWith("+OK")){
throw new ServletException("Incorrect Password");
}
// HTML tags
out.println("Your Email");
// Retrieve mail
in_sock.println("RETR "+mail);
String tmp=out_sock.readLine();
boolean header=true;
boolean body=false;
while (! tmp.equals(".")){
tmp=out_sock.readLine();
// Boldface the Subject lines
if (header){
if (tmp.startsWith("Date:") || tmp.startsWith("From:") || tmp.startsWith("To:") || tmp.startsWith("Subject:")){
out.println(""+tmp+"
");
}
else{
out.println(tmp+"
");
}
}
if (body) out.println(tmp);
if (tmp.equals("") && header){
body=true;
header=false;
out.println("");
}
}
out.println("");
in_sock.println("QUIT");
}
catch (ServletException e){
out.println(""+e+"");
out.println(""+e+"");
}
catch (UnknownHostException e){
out.println("Unknown Host");
out.println(""+e+"
");
out.println("The hostname you supplied is unknown, try again!");
out.println("");
}
catch (IOException e){
out.println("IOException");
out.println(""+e+"
");
out.println("");
}
}
}