Examples of org.apache.commons.net.pop3.POP3MessageInfo

org.apache.commons.net.pop3.POP3Client
POP3MessageInfo is used to return information about messages stored on a POP3 server. Its fields are used to mean slightly different things depending on the information being returned.
In response to a status command, number contains the number of messages in the mailbox, size contains the size of the mailbox in bytes, and identifier is null.
In response to a message listings, number contains the message number, size contains the size of the message in bytes, and identifier is null.
In response to unique identifier listings, number contains the message number, size is undefined, and identifier contains the message's unique identifier.

@author Daniel F. Savarese


    messages.put("headers", RestV2IT.addMessage(EMAIL_REGULAR, labelId));
    messages.put("attach", RestV2IT.addMessage(EMAIL_LARGE_ATT, labelId));


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    // Login
    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    // LIST all messages
    POP3MessageInfo[] info = client.listMessages();
    assertThat(info.length, equalTo(2));


    // DELE message 1
    boolean deleteResult = client.deleteMessage(1);
    assertThat(deleteResult, is(true));


    // LIST remaining
    info = client.listMessages();
    assertThat(info.length, equalTo(1));


    // DELE message 1 again
    deleteResult = client.deleteMessage(1);
    assertThat(deleteResult, is(false));
    
    // LIST remaining
    info = client.listMessages();
    assertThat(info.length, equalTo(1));


    // DELE message 2
    deleteResult = client.deleteMessage(2);
    assertThat(deleteResult, is(true));


    info = client.listMessages();
    assertThat(info.length, equalTo(0));


    // QUIT so the messages get expunged
    boolean logoutSuccess = client.logout();
    assertThat(logoutSuccess, is(true));


    // reconnect
    client.connect(POP3_HOST, POP3_PORT);


    // Login
    loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    info = client.listMessages();
    assertThat(info.length, equalTo(0));


    logoutSuccess = client.logout();
    assertThat(logoutSuccess, is(true));
  }

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    Integer labelId = ReservedLabels.POP3.getId();
    RestV2IT.addMessage(EMAIL_REGULAR, labelId);


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    // Login
    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    // LIST all messages
    POP3MessageInfo[] info = client.listMessages();
    assertThat(info.length, equalTo(1));


    // DELE message 1
    boolean deleteResult = client.deleteMessage(1);
    assertThat(deleteResult, is(true));


    // LIST remaining
    info = client.listMessages();
    assertThat(info.length, equalTo(0));


    // RSET. After this the deleted mark should be removed again
    boolean resetRestult = client.reset();
    assertThat(resetRestult, is(true));


    // LIST all messages
    info = client.listMessages();
    assertThat(info.length, equalTo(1));


    // Logout
    boolean logoutSuccess = client.logout();
    assertThat(logoutSuccess, is(true));
  }

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    Integer labelId = ReservedLabels.POP3.getId();
    RestV2IT.addMessage(EMAIL_REGULAR, labelId);
    RestV2IT.addMessage(EMAIL_LARGE_ATT, labelId);


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    POP3MessageInfo info = client.status();
    assertThat(info.size, equalTo((int) (mailSizeRegular + mailSizeAttach)));
    assertThat(info.number, equalTo(2));


    // Logout
    boolean logoutSuccess = client.logout();
    assertThat(logoutSuccess, is(true));
  }

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    Integer labelId = ReservedLabels.POP3.getId();
    RestV2IT.addMessage(EMAIL_SIMPLE, labelId);


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    // Login
    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    // RETR message
    Reader retrMessage = client.retrieveMessage(1);
    assertThat(retrMessage, notNullValue());


    checkMessage(EMAIL_SIMPLE, retrMessage);
    retrMessage.close();
    
        // RETR non-existing message
    retrMessage = client.retrieveMessage(10);
        assertThat(retrMessage, nullValue());
        
        // Delete and RETR the message again
    boolean deleteResult = client.deleteMessage(1);
    assertThat(deleteResult, is(true));
    
    retrMessage = client.retrieveMessage(1);
        assertThat(retrMessage, nullValue());
  }

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    Integer labelId = ReservedLabels.POP3.getId();
    RestV2IT.addMessage(EMAIL_SIMPLE, labelId);


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    // Login
    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    // TOP message with all lines
    Reader topMessage = client.retrieveMessageTop(1, 1000);
    assertThat(topMessage, notNullValue());
    checkMessage(EMAIL_SIMPLE, topMessage);
    topMessage.close();


    // TOP message with 5 lines
    topMessage = client.retrieveMessageTop(1, 5);
    assertThat(topMessage, notNullValue());
    checkMessage(EMAIL_SIMPLE, topMessage, 5);
    topMessage.close();


    // TOP non-existing message
    topMessage = client.retrieveMessageTop(10, 10);
    assertThat(topMessage, nullValue());


    // Delete and TOP the message again
    boolean deleteResult = client.deleteMessage(1);
    assertThat(deleteResult, is(true));


    topMessage = client.retrieveMessageTop(1, 1000);
    assertThat(topMessage, nullValue());
  }

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    messages.put("headers", RestV2IT.addMessage(EMAIL_REGULAR, labelId));
    messages.put("attach", RestV2IT.addMessage(EMAIL_LARGE_ATT, labelId));


    // initialize POP3 client
    POP3Client client = new POP3Client();
    client.connect(POP3_HOST, POP3_PORT);


    boolean loginSuccess = client.login(TEST_ACCOUNT, TEST_PASSWORD);
    assertThat(loginSuccess, is(true));


    // LIST all messages
    POP3MessageInfo[] info = client.listMessages();
    assertThat(info.length, equalTo(2));
    assertThat((int) mailSizeAttach, equalTo(info[0].size));
    assertThat((int) mailSizeRegular, equalTo(info[1].size));
    assertThat(info[0].number, equalTo(1));
    assertThat(info[1].number, equalTo(2));


    // LIST one message
    POP3MessageInfo msgInfo = client.listMessage(1);
    assertThat((int) mailSizeAttach, equalTo(msgInfo.size));
    assertThat(msgInfo.number, equalTo(1));


    // LIST message that does not exist
    msgInfo = client.listMessage(10);
    assertThat(msgInfo, nullValue());


    // UIDL all messages
    info = client.listUniqueIdentifiers();
    assertThat(info.length, equalTo(2));
    assertThat(info[0].identifier,
        equalTo(Base64UUIDUtils.encode(messages.get("attach"))));
    assertThat(info[1].identifier,
        equalTo(Base64UUIDUtils.encode(messages.get("headers"))));
    assertThat(info[0].number, equalTo(1));
    assertThat(info[1].number, equalTo(2));


    // UIDL one message
    msgInfo = client.listUniqueIdentifier(1);
    assertThat(msgInfo.identifier,
        equalTo(Base64UUIDUtils.encode(messages.get("attach"))));
    assertThat(msgInfo.number, equalTo(1));


    // UIDL message that does not exist
    msgInfo = client.listUniqueIdentifier(10);
    assertThat(msgInfo, nullValue());


    boolean logoutSuccess = client.logout();
    assertThat(logoutSuccess, is(true));
  }

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    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);

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    this.host = host;
    this.port = port;
    if (ssl) {
      this.client = new POP3SClient("SSL", true);
    } else {
      this.client = new POP3Client();
    }
    this.client.setDefaultTimeout(300000);
  }

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        String password = args[2];


        String proto = args.length > 3 ? args[3] : null;
        boolean implicit = args.length > 4 ? Boolean.parseBoolean(args[4]) : false;


        POP3Client pop3;


        if (proto != null) {
            System.out.println("Using secure protocol: "+proto);
            pop3 = new POP3SClient(proto, implicit);
        } else {
            pop3 = new POP3Client();
        }
        System.out.println("Connecting to server "+server+" on "+pop3.getDefaultPort());


        // We want to timeout if a response takes longer than 60 seconds
        pop3.setDefaultTimeout(60000);


        // suppress login details
        pop3.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true));


        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);
            }


            POP3MessageInfo[] messages = pop3.listMessages();


            if (messages == null)
            {
                System.err.println("Could not retrieve message list.");
                pop3.disconnect();
                return;
            }
            else if (messages.length == 0)
            {
                System.out.println("No messages");
                pop3.logout();
                pop3.disconnect();
                return;
            }


            for (POP3MessageInfo msginfo : messages) {
                BufferedReader reader = (BufferedReader) pop3.retrieveMessageTop(msginfo.number, 0);


                if (reader == null) {
                    System.err.println("Could not retrieve message header.");
                    pop3.disconnect();
                    System.exit(1);
                }
                printMessageInfo(reader, msginfo.number);
            }


            pop3.logout();
            pop3.disconnect();
        }
        catch (IOException e)
        {
            e.printStackTrace();
            return;

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    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);

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