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(Java) SFTP Resume Upload

Demonstrates how to resume an SFTP upload to an SSH server. The ResumeUploadFileByName method checks the size of the file on the remote server and begins uploading from the appropriate position in the local file.

Chilkat Java Downloads

Java Libs for Windows, Linux, MAC OS X, Solaris,
FreeBSD, ARM Embedded Linux, and PowerLinux

Java Libs for Android

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[])
  {
    //  Important: It is helpful to send the contents of the
    //  sftp.LastErrorText property when requesting support.

    CkSFtp sftp = new CkSFtp();

    //  Any string automatically begins a fully-functional 30-day trial.
    boolean success = sftp.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(sftp.lastErrorText());
        return;
    }

    //  Set some timeouts, in milliseconds:
    sftp.put_ConnectTimeoutMs(5000);
    sftp.put_IdleTimeoutMs(10000);

    //  Connect to the SSH server.
    //  The standard SSH port = 22
    //  The hostname may be a hostname or IP address.
    int port;
    String hostname;
    hostname = "www.my-ssh-server.com";
    port = 22;
    success = sftp.Connect(hostname,port);
    if (success != true) {
        System.out.println(sftp.lastErrorText());
        return;
    }

    //  Authenticate with the SSH server.  Chilkat SFTP supports
    //  both password-based authenication as well as public-key
    //  authentication.  This example uses password authenication.
    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        System.out.println(sftp.lastErrorText());
        return;
    }

    //  After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp();
    if (success != true) {
        System.out.println(sftp.lastErrorText());
        return;
    }

    //  Upload from the local file to the SSH server.
    //  Important -- the remote filepath is the 1st argument,
    //  the local filepath is the 2nd argument;
    String remoteFilePath = "hamlet.xml";
    String localFilePath = "c:/temp/hamlet.xml";

    //  The ResumeUploadFileByName method first gets the size
    //  of the partial file on the server and then begins uploading
    //  from the appropriate point in the local file.
    //  If the remote file does not exist or is 0-length, this
    //  method is equivalent to UploadFileByName.
    //  If the remote file is already equal to or larger in size
    //  than the local file, then nothing more is uploaded.
    success = sftp.ResumeUploadFileByName(remoteFilePath,localFilePath);
    if (success != true) {
        System.out.println(sftp.lastErrorText());
        return;
    }

    System.out.println("Success.");

  }
}

 

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