Opening PDF String in new window with javascript

Question

I have a formatted PDF string that looks like

%PDF-1.73 0 obj<<< /Type /Group /S /Transparency /CS /DeviceRGB >> /Resources 2 0 R/Contents 4 0 R>> endobj4 0 obj<> streamx��R=o�0��+��=|vL�R���l�-��ځ,���Ge�JK����{���Y5�����Z˯k�vf�a��`G֢ۢ��Asf�z�ͼ��`%��aI#�!;�t���GD?!���<�����B�b��

...

00000 n 0000000703 00000 n 0000000820 00000 n 0000000926 00000 n 0000001206 00000 n 0000001649 00000 n trailer << /Size 11 /Root 10 0 R /Info 9 0 R >>startxref2015%%EOF

I am trying to open up this string in a new window as a PDF file. Whenever I use window.open() and write the string to the new tab it thinks that the text should be the contents of an HTML document. I want it to recognize that this is a PDF file.

Any help is much appreciated

Answer 1

Just for information, the below

window.open("data:application/pdf," + encodeURI(pdfString)); 

does not work anymore in Chrome. Yesterday, I came across with the same issue and tried this solution, but did not work (it is 'Not allowed to navigate top frame to data URL'). You cannot open the data URL directly in a new window anymore. But, you can wrap it in iframe and make it open in a new window like below. =)

let pdfWindow = window.open("")
pdfWindow.document.write(
    "<iframe width='100%' height='100%' src='data:application/pdf;base64, " +
    encodeURI(yourDocumentBase64VarHere) + "'></iframe>"
)

Answer 2

var byteCharacters = atob(response.data);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
  byteNumbers[i] = byteCharacters.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
var file = new Blob([byteArray], { type: 'application/pdf;base64' });
var fileURL = URL.createObjectURL(file);
window.open(fileURL);

You return a base64 string from the API or another source. You can also download it.