Exist an easy way to convert base64 code in XML files into the original image file on forms

Question

I've made a form in lifecycle that will be distributed by email as a pdf, and submitted back to me as an XML file and then that data imported into the pdf form template to view the data. Issue is I have an "attach image" field on the form and in XML it gets written to a base64 encoded format. Is there convenient way to extract this code from the XML file so that I would have a workable jpeg image file that I can save and open in other apps? Thank you in advance!  -Robert Tampa

Answer 1

I tried to make John Brinkman's sample working in reverse.
This script will grab an image field's value and produce an attachment (png-file), which then can be saved to the hard drive.
//Get Base64 data of the image field
var b64Data = ImageField1.value.image.value;
//Convert to a read stream
var ReadStream = util.streamFromString(b64Data);
//Decode from Base64
var DecodedStream = Net.streamDecode(ReadStream, "base64");
//Attach an empty image file
event.target.createDataObject("MyExportImage.png", "", "image/png");
//Update attached image file with stream data
event.target.setDataObjectContents("MyExportImage.png", DecodedStream);
//Show attachment pane
event.target.viewState = {overViewMode:7};
This works so far, but the produced images are always cutted off.
No idea what's the reason for this behavior.