TCP/IP socket programming in ABAP

Hi,
Is there any method of TCP socket programming in ABAP? For example is there any function module for creating a socket for a IP address and port number. After that, is it possible to send binary/text data to a connected IP/port destination. I need such a solution because I need to send raw data (native commans) to barcode printer on our network which has a static IP address and listens incoming data through a fixed port number specified in its documentation. For a solution, I coded some .NET VB and built a small application that acts as a RFC server program which can be called by SAP according to definitions I made in SM59 (I defined a new TCP connection and it works well sometimes!). In this application, data coming from SAP are transferred to the barcode printer. This is achived by the .NET Socket class library. This solution works well but after a few subsequent call from SAP, connection hangs! SAP cannot call the application anymore, I test the connection in SM59 and it also hangs, so I need to restart the VB application, but this is unacceptable in our project.
As a result, I decided to code the program that will send data to the printer in ABAP as a function module or subroutine pool, so is there any way to create a socket in ABAP and connect to specific IP/port destination? I searched for possible function modules in SE37 and possible classes in SE24 but unfortunately I could not find one. For example, do know any kind of system function in ABAP (native commands executed by CALL statement), that can be used for this purpose?
I would appreciate any help,
Kind regards,
Tolga
Edited by: Tolga Togan Duz on Dec 17, 2007 11:49 PM

Hi,
I doubt that there is a low level API for sockets in ABAP. There is API for HTTP but probably that won't help you. As a workaround you can use external OS commands (transactions SM69 and SM49). For example on Unix you can use netcat to transfer file. Your FM needs to dump data into folder and then call netcat to transfer file.
Cheers

Similar Messages

  • About Socket program in ABAP

    Hi all,
    Can I do Socket program in ABAP?
    I know nothing about that,Can anyone help?
    Thanks very much.
    Pole

    Within ABAP you have access to OLE objects - take a look at ABAB stement SET PROPERTY.
    In our production we have some scale weights connected to a PC. On the PC an external vendor has created an OLE obejct that can retur te current state and weight of the scale weight directly into a SAP screen.
    I guess if you can write an OLE obejct that can handle it - it is possible.

  • Microcontroller socket programming with CVIwindows

    Hello,
    I am working on a project where a computer with CVIwindows GUI will be a server and my clients will be DS80C410 networked microcontrollers which has an inbuilt ethernet stack. The comm protocol will be TCP using socket programming. How do I develop socket programming on CVI to get the communication between microcontroller and CVI server?
    Regards,
    SR

    I've attached an example c file for a multiclient TCP server from the shipping examples of CVI. CVI includes a TCP and a UDP library and you can add expanded functionality using the subroutine you mentioned. There's also some basic information on TCP programming in CVI in that document I linked in my first response.
    Also you can get a 30 day trial of CVI here:
    http://digital.ni.com/src.nsf/websearch/70C455BB6564DEC986257880005141F8?OpenDocument&node=node=2030...
    I hope this answers your questions.
    Product Support Engineer
    National Instruments
    Attachments:
    MultiClientServer.c ‏20 KB

  • How to control tcp connection with java tcp socket programing ??

    Hi,
    I am connecting a server as using java socket programming.
    When server close the connection (socket object) as using close() method ,
    I can not detect this and My program continue sending data as if there is a connection with server.
    How to catch the closing connection ( socket ) with java socket programming.
    My Client program is as following :
    import java.io.PrintWriter;
    import java.net.Socket;
    public class client
      public client()
       * @param args
      public static void main(String[] args)
        Socket socket=null;
        PrintWriter pw=null;
        try
                          socket = new Socket("localhost",5555);
                          pw = new PrintWriter(socket.getOutputStream(),true);
                          int i=0;
                          while (true)
                            i++;
                            pw.println(i+". message is being send.");
                            Thread.sleep(5000);
        } catch (Exception ex)
                          ex.printStackTrace();
        } finally
                          try
                            if(pw!=null)pw.close();
                            if(socket!=null)socket.close();
                          } catch (Exception ex)
                            ex.printStackTrace();
                          } finally
    }

    I changed the code as following. But I couldn't catch the EOFException when I read from the socket. How can I catch this exception ?
    import java.io.BufferedReader;
    import java.io.EOFException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.Socket;
    import java.net.UnknownHostException;
    public class client
      public client()
       * @param args
      public static void main(String[] args)
        Socket socket=null;
        PrintWriter pw=null;
        BufferedReader bufIn=null;
        InputStreamReader inRead=null;
        InputStream in=null;
        try
                          socket = new Socket("localhost",5555);
                          in = socket.getInputStream();
                          inRead = new InputStreamReader(in);
                          bufIn = new BufferedReader(inRead);
                          pw = new PrintWriter(socket.getOutputStream(),true);
                          int i=0;
                          while (true)
                            i++;
                            try
                              bufIn.readLine();
                              pw.println(i+". message is being send.");
                              System.out.println(i+". message has been send");
                            } catch (Exception ex2)
                              System.out.println(ex2.toString());
                              System.out.println(i+". message could not be send");
                            } finally
                            Thread.sleep(5000);
        } catch (EOFException ex)
                          ex.printStackTrace();
        } catch (InterruptedException ex)
                          ex.printStackTrace();
        } catch (IOException ex)
                          ex.printStackTrace();
        } finally
                          try
                            if(pw!=null)pw.close();
                            if(socket!=null)socket.close();
                          } catch (Exception ex)
                            ex.printStackTrace();
                          } finally
    }

  • Error while calling java program from ABAP

    Hi Experts,
    We are trying for RFC inbound scenario.
    We followed the below blog
    /people/gregor.wolf3/blog/2004/08/26/setup-and-test-sap-java-connector-outbound-connection
    We are working with SAP JCO 3.0.2
    We are getting the error : 'STFC_CONNECTION' could not be found in the server repository.
    After I run the Java server program if I execute the RFC destination directly from SM 59 it is showing successful messages.
    If I stop the java program then this RFC is failing. Based on this we concluded that RFC to Java connection is working fine.
    But as mentioned in blog if we call the RFC Destination from ABAP program it is giving the below error,
    'STFC_CONNECTION' could not be found in the server repository.
    If we test the RFC destination using RFC_TRUSTED_CHECK standard FM we are getting the below error.
    'RFCPING' could not be found in the server repository.
    We create the RFC destination of Type : TCP/IP as exactly mention in the blog.
    Please help us in resolving this issue.
    Thanks
    Prince

    Pabi,
    Using the RFC connection,we can establish a link between Java and SAP.
    Afterwards,hope we can call Java program from ABAP.
    Below is the sample piece of code to establish RFC connection(link) between Java and SAP.
    DATA: REQUTEXT LIKE SY-LISEL,
          RESPTEXT LIKE SY-LISEL,
          ECHOTEXT LIKE SY-LISEL.
    DATA: RFCDEST like rfcdes-rfcdest VALUE 'NONE'.
    DATA: RFC_MESS(128).
    REQUTEXT = 'HELLO WORLD'.
    RFCDEST = 'JCOSERVER01'. "corresponds to the destination name defined in the SM59
    CALL FUNCTION 'STFC_CONNECTION'
       DESTINATION RFCDEST
       EXPORTING
         REQUTEXT = REQUTEXT
       IMPORTING
         RESPTEXT = RESPTEXT
         ECHOTEXT = ECHOTEXT
       EXCEPTIONS
         SYSTEM_FAILURE        = 1 MESSAGE RFC_MESS
         COMMUNICATION_FAILURE = 2 MESSAGE RFC_MESS.
    IF SY-SUBRC NE 0.
        WRITE: / 'Call STFC_CONNECTION         SY-SUBRC = ', SY-SUBRC.
        WRITE: / RFC_MESS.
    ENDIF.
    Regards,
    Sree

  • Java Swing and Socket Programming

    I am making a Messenger like yahoo Messenger using Swing and Socket Programming ,Multithreading .
    Is this techology feasible or i should try something else.
    I want to display my messenger icon on task bar as it comes when i install and run Yahoo Messenger.
    Which class i should use.

    I don't really have an answer to what you are asking. But I am developing the same kind of application. I am using RMI for client-server and server-server (i have distributed servers) communication and TCP/IP for client-client. So may be we might be able to help each other out. My email id is [email protected]
    Are you opening a new socket for every conversation? I was wondering how to multithread a socket to reuse it for different connections, if it is possible at all.
    --Poonam.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

  • TCP/IP Sockets

    TCP/IP Sockets
    I need to write a server/client program which will implement a weather server.
    A text file in the same directory as the server will be updated daily(manually) and the server will send this information to clients on request.
    The client need only collect the weather report then exit.
    To start with have the server handle one request, then when this works correctly, change it to stay running and serve any number of requests as they come in. The server will have a loop that calls accept(), then spawns a new Thread to handle each request.

    Here's one suggestion:
    1. Create a Client class.
    2. Create a Server class.
    3. Create a SpawnedServer class.
    4. Create an Application or whatever that uses the Client class.
    1. The Client class has as a data member a Socket that connects to the server and gets the info.
    2. The Server class has a ServerSocket and also has a while true loop that does the following:
    Socket sock = servSock.accept()
    new SpawnedServer(sock).start()
    3. The SpawnedServer class has a Socket data member that gets initialized in its constructor that is
    called when it is created above. The SpawnedServer class extends Thread and does most of its work
    in the run method.
    4. Start the server.
    5. Run application programs as desired.
    Think of all of the things that you would want a Client to do:
    For example, open a connection, receive a message, close a connection, output the reply...
    Think of all of the things that you would want a SpawnedServer to do:
    receive a message, process a message, respond to a message...
    Implement a small portion. Test it. When it works, implement another and test it. Do this until completed.
    I hope this advice helps some. I am relatively new to the programming game, but have found that it is very helpful
    to implement piece by piece when a program is somewhat complex.
    Good luck.

  • "ODBC Error= [17] [] "[Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]SQ

    Hi,
    I am getting the above error when trying to connect to a database located on remote database. if the database is on same system no problem.
    any clue???????pls help me.

    The full error msg is as follows and the back ground of the problem is decribed below...pls help me out.
    I have written some perl programs to be called by java to execute some database related tasks. My database located at a remote win2K server and database is MSSql and my programs are executing on WIN2k server. The problem is with perl talking to remote database...the following error is displaying...
    "ODBC Error= [17] [] "[Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]SQL Server does not exist or access denied."

  • Help with MIDlets - TCP client server program

    Hi I am new to using MIDlets, and I wanted to create a simple TCP client server program.. I found a tutorial in J2me forums and I am able to send a single message from server(PC) to client(Phonemulator) and from client to server. But I want to send a stream of messages to the server. Here is my program and I am stuck in the last step wher i want to send lot of messages to server. Here is my program, Could any one of u tell me how to do it? Or where am i going wrong in thsi pgm?
    Code:
    import java.io.InputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import javax.microedition.io.Connector;
    import javax.microedition.io.SocketConnection;
    import javax.microedition.io.StreamConnection;
    import javax.microedition.lcdui.Alert;
    import javax.microedition.lcdui.AlertType;
    import javax.microedition.lcdui.Command;
    import javax.microedition.lcdui.CommandListener;
    import javax.microedition.lcdui.Display;
    import javax.microedition.lcdui.Displayable;
    import javax.microedition.lcdui.Form;
    import javax.microedition.lcdui.StringItem;
    import javax.microedition.lcdui.TextField;
    import javax.microedition.midlet.MIDlet;
    import javax.microedition.midlet.MIDletStateChangeExcepti on;
    public class SocketMIDlet extends MIDlet
    implements CommandListener, Runnable {
    private Display display;
    private Form addressForm;
    private Form connectForm;
    private Form displayForm;
    private TextField serverName;
    private TextField serverPort;
    private StringItem messageLabel;
    private StringItem errorLabel;
    private Command okCommand;
    private Command exitCommand;
    private Command backCommand;
    protected void startApp() throws MIDletStateChangeException {
    if (display == null) {
    initialize();
    display.setCurrent(addressForm);
    protected void pauseApp() {
    protected void destroyApp(boolean unconditional)
    throws MIDletStateChangeException {
    public void commandAction(Command cmd, Displayable d) {
    if (cmd == okCommand) {
    Thread t = new Thread(this);
    t.start();
    display.setCurrent(connectForm);
    } else if (cmd == backCommand) {
    display.setCurrent(addressForm);
    } else if (cmd == exitCommand) {
    try {
    destroyApp(true);
    } catch (MIDletStateChangeException ex) {
    notifyDestroyed();
    public void run() {
    InputStream is = null;
    OutputStream os = null;
    StreamConnection socket = null;
    try {
    String server = serverName.getString();
    String port = serverPort.getString();
    String name = "socket://" + server + ":" + port;
    socket = (StreamConnection)Connector.open(name, Connector.READ_WRITE);
    } catch (Exception ex) {
    Alert alert = new Alert("Invalid Address",
    "The supplied address is invalid\n" +
    "Please correct it and try again.", null,
    AlertType.ERROR);
    alert.setTimeout(Alert.FOREVER);
    display.setCurrent(alert, addressForm);
    return;
    try {
    // Send a message to the server
    String request = "Hello\n\n";
    //StringBuffer b = new StringBuffer();
    os = socket.openOutputStream();
    //for (int i=0;i<10;i++)
    os.write(request.getBytes());
    os.close();
    // Read the server's reply, up to a maximum
    // of 128 bytes.
    is = socket.openInputStream();
    final int MAX_LENGTH = 128;
    byte[] buf = new byte[MAX_LENGTH];
    int total = 0;
    while (total<=5)
    int count = is.read(buf, total, MAX_LENGTH - total);
    if (count < 0)
    break;
    total += count;
    is.close();
    String reply = new String(buf, 0, total);
    messageLabel.setText(reply);
    socket.close();
    display.setCurrent(displayForm);
    } catch (IOException ex) {
    Alert alert = new Alert("I/O Error",
    "An error occurred while communicating with the server.",
    null, AlertType.ERROR);
    alert.setTimeout(Alert.FOREVER);
    display.setCurrent(alert, addressForm);
    return;
    } finally {
    // Close open streams and the socket
    try {
    if (is != null) {
    is.close();
    is = null;
    } catch (IOException ex1) {
    try {
    if (os != null) {
    os.close();
    os = null;
    } catch (IOException ex1) {
    try {
    if (socket != null) {
    socket.close();
    socket = null;
    } catch (IOException ex1) {
    private void initialize() {
    display = Display.getDisplay(this);
    // Commands
    exitCommand = new Command("Exit", Command.EXIT, 0);
    okCommand = new Command("OK", Command.OK, 0);
    backCommand = new Command("Back", Command.BACK, 0);
    // The address form
    addressForm = new Form("Socket Client");
    serverName = new TextField("Server name:", "", 256, TextField.ANY);
    serverPort = new TextField("Server port:", "", 8, TextField.NUMERIC);
    addressForm.append(serverName);
    addressForm.append(serverPort);
    addressForm.addCommand(okCommand);
    addressForm.addCommand(exitCommand);
    addressForm.setCommandListener(this);
    // The connect form
    connectForm = new Form("Connecting");
    messageLabel = new StringItem(null, "Connecting...\nPlease wait.");
    connectForm.append(messageLabel);
    connectForm.addCommand(backCommand);
    connectForm.setCommandListener(this);
    // The display form
    displayForm = new Form("Server Reply");
    messageLabel = new StringItem(null, null);
    displayForm.append(messageLabel);
    displayForm.addCommand(backCommand);
    displayForm.setCommandListener(this);

    Hello all,
    I was wondering if someone found a solution to this..I would really appreciate it if u could post one...Thanks a lot..Cheerz

  • How to call  java program from ABAP

    Hi Experts,
         My requirement is to call java programs from ABAP. For that i have set up SAP JCO connection by using this link http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/739. [original link is broken] [original link is broken] [original link is broken] Connection gets sucessfully. After this how to call java program from ABAP as per our requirement. Please help me out.
      Also i tried this way also.. but while executing the DOS Command line appear & disappear in few seconds. So couldnt see the JAVA output. Please help me out to call java programs in ABAP..
    DATA:command TYPE string VALUE 'D:Javajdk1.6.0_20 injavac',
    parameter TYPE string VALUE 'D:java MyFirstProgram'.
    CALL METHOD cl_gui_frontend_services=>execute
    EXPORTING
    application = command
    parameter = parameter
    OPERATION = 'OPEN'
    EXCEPTIONS
    cntl_error = 1
    error_no_gui = 2
    bad_parameter = 3
    file_not_found = 4
    path_not_found = 5
    file_extension_unknown = 6
    error_execute_failed = 7
    OTHERS = 8.
    Thanks.

    This depends on the version of your Netweaver Java AS. If you are running 7.0, you will have to use the Jco framework. The Jco framework is deprecated since 7.1 though. If you want to build a RFC server in 7.1 or higher, it is adviced that you set it up through JRA.
    Implement an RFC server in 7.0:
    http://help.sap.com/saphelp_nw04/helpdata/en/6a/82343ecc7f892ee10000000a114084/frameset.htm
    Implement an RFC server in 7.1 or higher:
    http://help.sap.com/saphelp_nwce72/helpdata/en/43/fd063b1f497063e10000000a1553f6/frameset.htm

  • Unable to open any programs in ABAP editor

    Hi folks i'm unable to open any programs in ABAP Editor.
    When ever i try to open any program it goes to short dump.
    Even when i try to open STO4 to view error log.
    it shows following message
    Short text
        Runtime error, short dump could not be written.
    What happened?
        Error in the ABAP Application Program
        The current ABAP program " " had to be terminated because it has
        come across a statement that unfortunately cannot be executed.
        Unfortunately, the system cannot carry out a detailed analysis of the
        error, as the table SNAP (which gathers information at the time of
        termination) does not contain a suitable short dump.
    Information About Termination Point in XSLT Prog.
        Termination occurred in the XSLT program " ".
        The call took place using CALL TRANSFORMATION from the ABAP
        program specified below.
        In the source code, the termination point is in line " "
        of the (Include) program " ".
    Internal notes
        The termination was triggered in function " "
        of the SAP kernel, in line " " of the module " ".
        The internal operation just processed is " ".
        Internal mode was started at " ".

    hi,
    check whether any exit has been implemented for se38 and because of some statements in that it may goto dump.
    also try to open ur program from SE80.if u have access to se80 then u can do it from there itself.
    reward points  if hlpful.

  • Serial Communication through TCP/IP Socket

    There are several companies offering a serial to ethernet software solution--emulating a terminal server, however they are all for Windows or MAC. I am looking for a starting point, examples, or a final solution (yeah) that is 100% java. In the field, the device is a RS232 LED board connected to a hardware terminal server. The message software writes to a TCP/IP socket. For testing, I would like my notebook's serial port to emulate the terminal server (I have been using TCP/COM from TAL tech for Windows). I bounce back and forth between Windows and Linux (dual boot) and would like one consistent solution for testing on most any platform/flavor.

    Check out this link:
    http://kaffe.iocon.dk/serialjavademo.html

  • I need  information  about  oops  concept  programming  in abap

    Hi  ,
    I need  information  about  oops  concept  programming  in abap
    Thanks,
    Asha

    Of course, the best place to start is help.sap.com.
    http://help.sap.com/saphelp_nw2004s/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
    There are a couple good books out there as well.  You can get them at www.amazon.com
    Regards,
    Rich Heilman

  • Calling Java program from ABAP

    Hi All,
    my ABAP program downloads one file to one folder. Then one Java program is running to Encrypt the file.
    Now , they want to call the JAVA program in ABAP, so that they can encrypt the file before downloading.
    Is it possible to call a Java program from ABAP ? If Yes, please give me the detailed procedure.
    Thanks
    pabi

    Pabi,
    Using the RFC connection,we can establish a link between Java and SAP.
    Afterwards,hope we can call Java program from ABAP.
    Below is the sample piece of code to establish RFC connection(link) between Java and SAP.
    DATA: REQUTEXT LIKE SY-LISEL,
          RESPTEXT LIKE SY-LISEL,
          ECHOTEXT LIKE SY-LISEL.
    DATA: RFCDEST like rfcdes-rfcdest VALUE 'NONE'.
    DATA: RFC_MESS(128).
    REQUTEXT = 'HELLO WORLD'.
    RFCDEST = 'JCOSERVER01'. "corresponds to the destination name defined in the SM59
    CALL FUNCTION 'STFC_CONNECTION'
       DESTINATION RFCDEST
       EXPORTING
         REQUTEXT = REQUTEXT
       IMPORTING
         RESPTEXT = RESPTEXT
         ECHOTEXT = ECHOTEXT
       EXCEPTIONS
         SYSTEM_FAILURE        = 1 MESSAGE RFC_MESS
         COMMUNICATION_FAILURE = 2 MESSAGE RFC_MESS.
    IF SY-SUBRC NE 0.
        WRITE: / 'Call STFC_CONNECTION         SY-SUBRC = ', SY-SUBRC.
        WRITE: / RFC_MESS.
    ENDIF.
    Regards,
    Sree

  • File descriptor leak in socket programming

    We have a complex socket programming client package in java using java.nio (Selectors, Selectable channel).
    We use the package to connect to a server.
    Whenever the server is down, it tries to reconnect to the server again at regular intervals.
    In that case, the number of open file descriptors build up with each try. I am able to cofirm this using "pfile <pid>" command.
    But, it looks like we are closing the channels, selectors and the sockets properly when it fails to connect to the server.
    So we are unable to find the coding that causes the issue.
    We run this program in solaris.
    Is there a tool to track down the code that leaks the file descriptor.
    Thanks.

    Don't close the selector. There is a selector leak. Just close the socket channel. As this is a client you should then also call selector.selctNow() to have the close take final effect. Otherwise there is also a socket leak.

Maybe you are looking for

  • How do i add a custom paper size to an hp deskjet 3000 j310 series?

    I'm using the printer with Windows 7. Trying to print on 5.5" by 8.5" paper, which is not displayed under paper size in properties (Paper/Quality tab). I don't see a way of adding custom sizes.I thought maybe the custom check box under the same Paper

  • ABAP QUERY Report : column number change

    Hi friends, I need to modify the existing ABAP QUERY REPORT. I have added a new field in the selection screen. When I execute the query, it(our new filed) is displaying at the end of the columns. But I want it to be at 8th columns. please help me. Wh

  • Lobby Ambassador can't email guest user accounts via WCS

    WCS is configured with SMTP server under Administration-Settings-Mail Server Configuration and test is successful and it sends e-mail alerts out no problem. However, when Lobby Ambassador creates a new guest account and clicks on the e-mail link to e

  • Automate OCR process through some API

    Is there a way in which PDF 'OCR'ing' can be done on the server programmatically. We require this to make user submitted PDF's searchable in our .Net online solution.

  • Why is my PhotoStream empty?

    Last Monday my iPhoto collapsed, none of my photos are there, though they are still in my computer, I can see the thumbnails in events and I can see the photos when I scroll over them, but when I open them they are empty. Same with my Photostream: it