Asynchronous HTTP Upload

Demonstrates how to do an HTTP upload asynchronously in a background thread. The Chilkat Upload software is freeware and may be used in both commercial and non-commercial applications and websites.

The C# code to receive the upload at http://www.chilkatsoft.com/receiveUpload.aspx may be seen here: C# ASP.NET Code to Receive Upload

Download Chilkat Java Library

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[])
  {
    CkUpload upload = new CkUpload();

    //  Specify the page (ASP, ASP.NET, Perl, Python, Ruby, CGI, etc)
    //  that will process the HTTP Upload.
    upload.put_Hostname("www.chilkatsoft.com");
    upload.put_Path("/receiveUpload.aspx");

    //  Add one or more files to be uploaded.
    upload.AddFileReference("file1","dude.gif");
    upload.AddFileReference("file2","pigs.xml");
    upload.AddFileReference("file3","sample.doc");

    //  Begin the HTTP upload in a background thread:
    boolean success;
    success = upload.BeginUpload();
    if (success != true) {
        System.out.println(upload.lastErrorText());
    }
    else {
        System.out.println("Files uploaded!");
    }

    //  Wait for the upload to finish.
    //  Print the progress as we wait...
    while ((upload.get_UploadInProgress() == true)) {
        //  We can abort the upload at any point by calling:
        //  upload.AbortUpload();

        //  Display the percentage complete and the number of bytes uploaded so far..
        //  The total upload size will become set after the upload begins:
        System.out.println(upload.get_PercentUploaded()
             + "% " + upload.get_NumBytesSent() + "/"
             + upload.get_TotalUploadSize());

        //  Sleep 2/10ths of a second.
        upload.SleepMs(200);

    }

    //  Did the upload succeed?
    if (upload.get_UploadSuccess() == true) {
        System.out.println("Files uploaded!");
    }
    else {
        System.out.println(upload.lastErrorText());
    }

  }
}