Saving multiple times causes corrupt PDFs

[GoogleCodeExporter]

I had a requirement to use the save() function twice, once to get the binary 
for saving to the 
database, then again to print the file to the browser so the user could preview 
it.  The first save 
worked fine, but the second file would always result in a corrupt PDF file.

myPDF.fileData = myPDF.save(Method.LOCAL);
myPDF.save(Method.REMOTE, "/go/print","inline",outFilename);

I worked around the issue by subclassing PDF.as, adding a numSaves:uint class 
variable, and 
only invoking the finish() logic when numSaves==0:

        override public function save ( method:String, url:String='', 
downloadMethod:String='inline', fileName:String='generated.pdf', 
frame:String="_blank" ):*
        {
            // don't do finishing more than once per file.  causes second save to corrupt.
            if(numSaves==0) {
                dispatcher.dispatchEvent( new ProcessingEvent ( ProcessingEvent.STARTED ) );
                var started:Number = getTimer();
                finish();
                dispatcher.dispatchEvent ( new ProcessingEvent ( ProcessingEvent.COMPLETE, 
getTimer() - started ) );
                buffer.position = 0;
                var output:* = null;
            }

            numSaves++;

....

Original issue reported on code.google.com by rich.thi...@gmail.com on 8 Dec 2009 at 7:20