import himcotton.SWFHeader.*;

var reader:SWFReader = new SWFReader(new URLRequest("ep.swf"));

reader.addEventListener(SWFEvent.COMPLETE, complete);

function complete (event:SWFEvent):void
{
    trace(event.info);          //  output  [SWFInfo frameRate=50 version=9 height=300 fileLength=4570 signature=CWS width=400 isZlib=true frameCount=1]
    trace(event.info.toXML());  //  output the SWF file header info by XML object format.
}

import himcotton.SWFHeader.SWFInfo;

var loader:URLLoader = new URLLoader(new URLRequest("ep.swf"));
   
loader.dataFormat = URLLoaderDataFormat.BINARY;
loader.addEventListener(Event.COMPLETE, complete);
  
function complete (event:Event):void
{
     trace(new SWFInfo(event.target.data));
}