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Convert url to blob for large file size download (#1455)

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* Convert url to blob for large size download

* Replaced var with let

Co-authored-by: Harsh Khandeparkar <34770591+HarshKhandeparkar@users.noreply.github.com>
Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>
This commit is contained in:
Shazeb Ata
2021-03-11 21:53:58 +05:30
committed by GitHub
parent 7751024d71
commit 5298d1e0ec
1 changed files with 14 additions and 2 deletions
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14
examples/lib/defaultHtmlStepUi.js
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@@ -339,11 +339,23 @@ function DefaultHtmlStepUi(_sequencer, options) {
$stepAll('.download-btn').on('click', () => {
function dataURLtoBlob(dataurl) {
let arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
while(n--){
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], {type:mime});
}
var element = document.createElement('a');
element.setAttribute('href', step.output);
element.setAttribute('download', step.name + '.' + fileExtension(step.imgElement.src));
element.style.display = 'none';
document.body.appendChild(element);
var blob = dataURLtoBlob(step.output);
var objurl = URL.createObjectURL(blob);
element.setAttribute('href', objurl);
element.click();
});