(Java) SSH ReceiveUntilMatchN

Demonstrates how to call the SSH ChannelReceiveUntilMatchN method.

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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[])
  {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSsh ssh = new CkSsh();
    boolean success;

    // For the sake of the example, pretend the remote shell prompt
    // will be any of the following:
    CkStringArray saPrompts = new CkStringArray();

    saPrompts.Append("~$");
    saPrompts.Append("mars#");
    saPrompts.Append("jupiter%");
    saPrompts.Append("chilkat$");
    saPrompts.Append("admin>");

    String cmdOutput;

    // Connect to an SSH server:
    // Hostname may be an IP address or hostname:
    String hostname = "www.some-ssh-server.com";
    int port = 22;

    success = ssh.Connect(hostname,port);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Wait a max of 10 seconds when reading responses..
    ssh.put_IdleTimeoutMs(10000);

    // Authenticate using login/password:
    success = ssh.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Open a session channel.  (It is possible to have multiple
    // session channels open simultaneously.)
    int channelNum = ssh.OpenSessionChannel();
    if (channelNum < 0) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    String termType = "dumb";
    int widthInChars = 120;
    int heightInChars = 40;
    // Use 0 for pixWidth and pixHeight when the dimensions
    // are set in number-of-chars.
    int pixWidth = 0;
    int pixHeight = 0;
    success = ssh.SendReqPty(channelNum,termType,widthInChars,heightInChars,pixWidth,pixHeight);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Start a shell on the channel:
    success = ssh.SendReqShell(channelNum);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    //  Run the 1st command in the remote shell, which will be to
    //  "cd" to a subdirectory.
    success = ssh.ChannelSendString(channelNum,"cd workspace\n","utf-8");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Retrieve the output to the next prompt:
    boolean caseSensitiveMatch = true;
    success = ssh.ChannelReceiveUntilMatchN(channelNum,saPrompts,"utf-8",caseSensitiveMatch);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    //  Display what we've received so far.  This clears
    //  the internal receive buffer, which is important.
    //  After we send the command, we'll be reading until
    //  the next command prompt.  If the command prompt
    //  is already in the internal receive buffer, it'll think it's
    //  already finished...
    cmdOutput = ssh.getReceivedText(channelNum,"utf-8");
    if (ssh.get_LastMethodSuccess() != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    System.out.println(cmdOutput);

    //  Run the 2nd command in the remote shell, which will be
    //  to "ls" the directory.
    success = ssh.ChannelSendString(channelNum,"ls\n","utf-8");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Retrieve and display the output.
    success = ssh.ChannelReceiveUntilMatchN(channelNum,saPrompts,"utf-8",caseSensitiveMatch);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    cmdOutput = ssh.getReceivedText(channelNum,"utf-8");
    if (ssh.get_LastMethodSuccess() != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    System.out.println(cmdOutput);

    //  Start the final command in the remote shell.  This example
    //  will send a "ls -l" command to retrieve the long format directory listing.
    success = ssh.ChannelSendString(channelNum,"ls -l\n","utf-8");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Send an EOF.  This tells the server that no more data will 
    // be sent on this channel.  The channel remains open, and
    // the SSH client may still receive output on this channel.
    success = ssh.ChannelSendEof(channelNum);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Read whatever output may already be available on the
    // SSH connection.  ChannelReadAndPoll returns the number of bytes
    // that are available in the channel's internal buffer that
    // are ready to be "picked up" by calling GetReceivedText
    // or GetReceivedData.
    // A return value of -1 indicates failure.
    // A return value of -2 indicates a failure via timeout.

    // The ChannelReadAndPoll method waits
    // for data to arrive on the connection usingi the IdleTimeoutMs
    // property setting.  Once the first data arrives, it continues
    // reading but instead uses the pollTimeoutMs passed in the 2nd argument:
    // A return value of -2 indicates a timeout where no data is received.
    int pollTimeoutMs = 2000;
    int n = ssh.ChannelReadAndPoll(channelNum,pollTimeoutMs);
    if (n < 0) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Close the channel:
    success = ssh.ChannelSendClose(channelNum);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Perhaps we did not receive all of the commands output.
    // To make sure,  call ChannelReceiveToClose to accumulate any remaining
    // output until the server's corresponding "channel close" is received.
    success = ssh.ChannelReceiveToClose(channelNum);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    cmdOutput = ssh.getReceivedText(channelNum,"utf-8");
    if (ssh.get_LastMethodSuccess() != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    System.out.println(cmdOutput);

    // Disconnect
    ssh.Disconnect();
  }
}