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Ankit Khujneri
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Problem generating PDF using LifeCycle Designer ES

May 27, 2009 7:42 AM



I am facing one problem while creating PDF using life cycle designer tool.

I am trying to generate a PDF that will contain a simple textInput with some text. I am using a snapshot class to capture this component.

This captured image is converted to base64 using base64Encoder.Now, this encoded string creates a problem with lifeCycle Designer..

If I enter,say 7, in textInput, the PDF gets generated properly with a complete snaphot of text box and the text within. But if I enter some other text, say XXDD, the PDF generation fails. Is there any problem with decoding the base64 encoded string?

Here is some code snippet :


// Flex code

private function generateImagePdf() : void {
            var url:String = "/pdfSampleApp";
        var snapshot:ImageSnapshot = ImageSnapshot.captureImage(uname);// uname is a textInput
        containerImage = ImageSnapshot.encodeImageAsBase64(snapshot);
        url = url + "/PDFGeneratorServlet?xmlData="+xmlImageModel";
         navigateToURL(new URLRequest(url), "_New");

// this XML is passed as parameter

<mx:XML id="xmlImageModel" >


//This code wil build the document from param String. This param is a parameter from request.

String param = req.getParameter("xmlData");

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db;
            Document doc = null;
            db = dbf.newDocumentBuilder();
            doc = db.parse(new InputSource(new StringReader(param)));




// Save new PDF as a byte array in the current session
            byte[] bytes = helper.saveToByteArray();

            // Close any resources


            BufferedOutputStream bos = new BufferedOutputStream(resp


private void processElement(Element elem) throws Exception {
        System.out.println("Tag:  " + elem.getNodeName());
        //System.out.println("NS:   " + elem.getNamespaceURI());

        NodeList children = elem.getChildNodes();
        for (int ii = 0; ii < children.getLength(); ii++) {
            Node child = children.item(ii);
            if (child instanceof Element)
                processElement((Element) child);
            else if (child instanceof Text) {
                String a = child.getNodeValue();
                a = a.replace(' ', '/');

                System.out.println("Text: " + child.getNodeValue());




On printing the value of the node <imageField> gives me data like:

         iVBORw0KGgoAAAANSUhEUgAAAN4AAAA4CAYAAACSekYo.// this is Base64 encoded string. For this case the PDF generation is successful, but if the string contains some spaces in between, the PDF generation fails.


Please suggest!


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