package examples;
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import org.apache.commons.net.pop3.POP3Client;
import org.apache.commons.net.pop3.POP3MessageInfo;
/***
* This is an example program demonstrating how to use the POP3Client class.
* This program connects to a POP3 server and retrieves the message
* headers of all the messages, printing the From: and Subject: header
* entries for each message.
* <p>
* Usage: messages <pop3 server hostname> <username> <password>
* <p>
***/
public final class messages
{
public static final void printMessageInfo(BufferedReader reader, int id)
throws IOException
{
String line, lower, from, subject;
from = "";
subject = "";
while ((line = reader.readLine()) != null)
{
lower = line.toLowerCase();
if (lower.startsWith("from: "))
from = line.substring(6).trim();
else if (lower.startsWith("subject: "))
subject = line.substring(9).trim();
}
System.out.println(Integer.toString(id) + " From: " + from +
" Subject: " + subject);
}
public static final void main(String[] args)
{
int message;
String server, username, password;
POP3Client pop3;
Reader reader;
POP3MessageInfo[] messages;
if (args.length < 3)
{
System.err.println(
"Usage: messages <pop3 server hostname> <username> <password>");
System.exit(1);
}
server = args[0];
username = args[1];
password = args[2];
pop3 = new POP3Client();
// We want to timeout if a response takes longer than 60 seconds
pop3.setDefaultTimeout(60000);
try
{
pop3.connect(server);
}
catch (IOException e)
{
System.err.println("Could not connect to server.");
e.printStackTrace();
System.exit(1);
}
try
{
if (!pop3.login(username, password))
{
System.err.println("Could not login to server. Check password.");
pop3.disconnect();
System.exit(1);
}
messages = pop3.listMessages();
if (messages == null)
{
System.err.println("Could not retrieve message list.");
pop3.disconnect();
System.exit(1);
}
else if (messages.length == 0)
{
System.out.println("No messages");
pop3.logout();
pop3.disconnect();
System.exit(1);
}
for (message = 0; message < messages.length; message++)
{
reader = pop3.retrieveMessageTop(messages[message].number, 0);
if (reader == null)
{
System.err.println("Could not retrieve message header.");
pop3.disconnect();
System.exit(1);
}
printMessageInfo(new BufferedReader(reader), messages[message].number);
}
pop3.logout();
pop3.disconnect();
}
catch (IOException e)
{
e.printStackTrace();
System.exit(1);
}
}
}