Modify Content-Disposition Header Fields in MIME

Demonstrates how to edit the Content-Disposition header in MIME sub-parts.

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[])
  {

    //  The intent of this example is to modify Content-Disposition
    //  header fields from this:
    // 
    //  Content-Disposition: attachment; filename="a4 manuscript.pdf"; size=0;
    //  	creation-date="Thu, 12 Apr 2007 06:39:10 GMT";
    //  	modification-date="Thu, 12 Apr 2007 06:39:10 GMT"
    // 
    //  to this:
    // 
    //  content-disposition: attachment;
    //  	 filename="a4 manuscript.pdf"
    // 

    CkMime mime = new CkMime();

    boolean success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        System.out.println("Failed to unlock");
        return;
    }

    success = mime.LoadMimeFile("testMime.txt");
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
    }

    //  This example assumes the header fields to be modified
    //  are located directly beneath the top-level MIME part.
    int numParts;
    numParts = (int) mime.get_NumParts();

    int i;
    CkMime mimePart;

    String filename;
    String disposition;

    for (i = 0; i <= numParts - 1; i++) {
        mimePart = mime.GetPart(i);

        disposition = mimePart.disposition();
        if (disposition == "attachment") {
            filename = mimePart.filename();
            //  AddHeaderField replaces the existing field if it already exists.
            //  Discard the contents of the existing Content-Disposition
            //  and replace it with "attachment".
            mimePart.AddHeaderField("content-disposition","attachment");

            //  Now add the filename attribute:
            mimePart.put_Filename(filename);
        }

    }

    success = mime.SaveMime("modifiedMime.txt");


  }
}