Connected with server, but commands do not seem to arrive..

Question

Hello there,
I'm trying to create a connection with an IMAP server which is secured
through SSL. I can get the connection just fine, and I get a first respone
from the server. But then I send out my login string, and it does not seem
to arrive at the server, because I don't get an answer returned! After some
time, I receive a message from the server saying that I've been idle for too
long, and then the connection gets closed..
But why doesn't my data arrive at the server? (because I believe that 's the
problem here).
I realy hope someone could help me out :)
CheckIMAP.java:
import java.io.*;
import java.net.*;
import javax.net.*;
import javax.net.ssl.*;
import java.security.*;
public class CheckIMAP
    static Socket imap = null;
    static OutputStreamWriter outStream = null;
    static InputStream inStream = null;
    static BufferedReader reader = null;
    static int currentState = 0; /* 0 = nothing, 1=connecting, 2= login */
    //public CheckIMAP(String host, String user, String password, int port)
    public static void main(String[] args)
        SSLContext sc = null;
        String line = null;
        // server information
        String host = "server";
        int port = 993;
        try
            // Create a trust manager that does not validate certificate
chains
            TrustManager[] trustAllCerts = new TrustManager[]{
                new X509TrustManager() {
                    public java.security.cert.X509Certificate[]
getAcceptedIssuers() {
                        return null;
                    public void checkClientTrusted(
                        java.security.cert.X509Certificate[] certs, String
authType) {
                    public void checkServerTrusted(
                        java.security.cert.X509Certificate[] certs, String
authType) {
            // Install the all-trusting trust manager
            try
                sc = SSLContext.getInstance("SSL");
                sc.init(null, trustAllCerts, new
java.security.SecureRandom());
            catch (Exception e)
                e.printStackTrace();
            // connect with the IMAP server
            currentState = 1;
            SocketFactory socketFactory = sc.getSocketFactory();
            imap = socketFactory.createSocket(host, port);
            outStream = new OutputStreamWriter(imap.getOutputStream());
            inStream = imap.getInputStream();
            reader = new BufferedReader(new
java.io.InputStreamReader(inStream));
            line = reader.readLine();
            while(line != null)
                print(line);
                System.out.println("** CurrentState: "+currentState);
                readData(line);
                line = reader.readLine();
            close();
        catch(UnknownHostException e)
            System.out.println("UnknownHostException has been caught.");
            e.printStackTrace();
        catch(IOException e)
            System.out.println("IOException has been caught");
            e.printStackTrace();
    public static void readData(String line)
        if( line.substring(0,4).equalsIgnoreCase("* OK") )
            // connection ok, now authenticate
            System.out.println("** Connected to IMAP server");
            write("A001 LOGIN foo bar");
            currentState = 2;
        else
            // Connection failed, abort
            System.out.println("** Connection failed, aborting");
            close();
    // close the socket and all the streams
    public static void close()
        try
            System.out.println("** Closing all connections.");
            inStream.close();
            outStream.close();
            imap.close();
            reader.close();
        catch(IOException e)
            System.out.println("IOException has been caught");
            e.printStackTrace();
    // sent a command to the server
    public static void write(String cmd)
        try
            outStream.write(cmd);
            outStream.flush();
        catch(IOException e)
            System.out.println("IOException has been caught");
            e.printStackTrace();
        System.out.println("--> "+cmd);
    // print out every line received from the server
    public static void print(String rcvd)
        System.out.println("<-- "+rcvd);
}Many thanks for any help!!
Steven

Answer 1

Are you sending a line terminating \n or \r\n or whatever the protocol requires...?