Java

Get IMAP UID from Email Header

See more IMAP Examples

Demonstrates how to get the IMAP UID from an email header. After fetching an email or header using IMAP, the UID is contained in the ckx-imap-uid header field. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkImap imap = new CkImap();

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    success = imap.Connect("imap.example.com");
    if (success == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // Login
    success = imap.Login("login","password");
    if (success == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    boolean fetchUids = true;
    // Get the message UIDs of all the emails in the mailbox

    CkMessageSet messageSet = new CkMessageSet();
    success = imap.QueryMbx("ALL",fetchUids,messageSet);
    if (success == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    CkEmailBundle bundle = new CkEmailBundle();
    boolean headersOnly = true;
    success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
    if (success == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // The UID of each fetched email header is available 
    // in the ckx-imap-uid header field.
    CkEmail email = new CkEmail();
    CkMessageSet msgSet1 = new CkMessageSet();
    int i = 0;
    int szBundle = bundle.get_MessageCount();
    while (i < szBundle) {
        bundle.EmailAt(i,email);

        // Build a message set containing one UID
        String uidStr = email.getHeaderField("ckx-imap-uid");
        msgSet1.FromCompactString(uidStr);

        // Move this message to some other folder.
        success = imap.MoveMessages(msgSet1,"someOtherFolder");
        if (success != true) {
            System.out.println(imap.lastErrorText());
            // Exit the loop...
            i = szBundle;
            }

        i = i+1;
        }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();
  }
}