Having trouble with base64

[jjanow]

Hello folks,

I'd be grateful if someone could help me figure out a problem I am having.  I've got code to grab an attachment from a request item, base64 encode it, send it to a MID server using the ECC queue, base64 decode it, then write it to a file.  The problem is that the resulting file is almost twice as large as the original file.  Examining it in a text editor shows extensive corruption. Thank you in advance for your time and help.

The code works in two parts.  The first is the script include that I call from my workflow.  It lives in a scoped app:

grSysAtt = new GlideRecord('sys_attachment');
grSysAtt.addQuery('table_name', table);
grSysAtt.addQuery('table_sys_id', gr.sys_id);
grSysAtt.query();

while (grSysAtt.next())
{
  is_match = grSysAtt.file_name.match(re);
  if (is_match)
  {
     sa = new GlideSysAttachment();
     attachmentContents = sa.getContent(grSysAtt);
     encData = gs.base64Encode(attachmentContents);
     
    jspr = new global.JavascriptProbe(this.mid);
    jspr.setName('CopyAttachmentToMidServer/' + gr.number);
    jspr.setJavascript("var attr = new SaveAttachment(); attr.execute();");
    jspr.addParameter("encodedData", encData);
    jspr.addParameter("directory", this.dir + gr.number);
    jspr.addParameter("file_name", grSysAtt.file_name);
    jspr.create();
    result.push(grSysAtt.file_name.toString());
  }
}

The second part is a MID server script include that uses a Java call to decode the stream and write it to a file:

SaveAttachment.prototype.execute = function ()
{
    'use strict';
    var result = false;
	
    try
	{
		new Packages.java.io.File( this.dir ).mkdirs();
		var fos = new Packages.java.io.FileOutputStream(this.dir +"/"+ this.file_name);
		var str = this.Encoded_Data;
		var s = new Packages.java.lang.String(str);		
		var strContent = new Packages.com.glide.util.Base64().decode(s);
		
		fos.write(strContent);
		fos.close();
		result = true;
	}
	catch(err)
	{
		result = err;
	}
    return result;
};

[jjanow]

It's about 50K and it's a ZIP file that contains a .docx file.