Convert Base 64 to PDF in Oracle Visual Builder

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Convert Base 64 to PDF in Oracle Visual Builder

Convert Base 64 to PDF in Oracle Visual Builder

Ankur Jain
2148

We came across one scenario where we need to call an external API that produces the PDF as a base64 string in response to the API and we need to allow users to download the PDF in Oracle Visual Builder.

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As we all know, Oracle Visual Builder supports JavaScript which can help us to write custom logic as per our requirement so to convert the Base 64 String to PDF, we are going to write a JS that will do this conversion.

JavaScript code to convert base 64 string to PDF:

base64toPDF(data,invoiceid) {
var bString = window.atob(data);
var bLength = bString.length;
var bytes = new Uint8Array(bLength);
for (var i = 0; i < bLength; i++) {
var ascii = bString.charCodeAt(i);
bytes[i] = ascii;
}
var bufferArray = bytes;
var blobStore = new Blob([bufferArray], { type: "application/pdf" });
if (window.navigator && window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveOrOpenBlob(blobStore);
return;
}
var data1 = window.URL.createObjectURL(blobStore);
var link = document.createElement('a');
document.body.appendChild(link);
link.href = data1;
link.download = invoiceid+".pdf";
window.open(data1,'_blank');
//link.click();
//window.URL.revokeObjectURL(data1);
//link.remove();
}

Recorded an end-to-end video to show this demonstration. Click on the following link to watch this demonstration:

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