Filename of downloaded file in data:Application/octet-stream; - html

Question

I am trying to download a file using data uri in following manner:
<input type="button"
onclick="window.location.href='data:Application/octet-stream;content-disposition:attachment;filename=file.txt,${details}'"
value="Download"/>
The problem is that the downloaded file is always named 'Unknown', whatever I try to use as
filename. Is this the correct way to give the file a name ? or something else needs to be
done ?

Answer 1

Here's the solution, you just have to add a download attribute to anchor tag
a with desired name
<a href="data:application/csv;charset=utf-8,Col1%2CCol2%2CCol3%0AVal1%2CVal2%2CVal3%0AVal11%2CVal22%2CVal33%0AVal111%2CVal222%2CVal333"
download="somedata.csv">Example</a>
Another solution is to use JQuery/Javascript
Anchor's Download Property

Answer 2

On Safari, you might want to use this, and instruct the user to ⌘-S the file:
window.open('data:text/csv;base64,' + encodeURI($window.btoa(content)));
Otherwise, this uses Filesaver.js, but works ok:
var downloadFile = function downloadFile(content, filename) {
var supportsDownloadAttribute = 'download' in document.createElement('a');
if(supportsDownloadAttribute) {
var link = angular.element('<a/>');
link.attr({
href: 'data:attachment/csv;base64,' + encodeURI($window.btoa(content)),
target: '_blank',
download: filename
})[0].click();
$timeout(function() {
link.remove();
}, 50);
} else if(typeof safari !== 'undefined') {
window.open('data:attachment/csv;charset=utf-8,' + encodeURI(content));
} else {
var blob = new Blob([content], {type: "text/plain;charset=utf-8"});
saveAs(blob, filename);
}
}
Note: There is some AngularJS in the code above, but it should be easy to factor out...

Answer 3

I had the same issue and finally I solved in all browsers serving the CSV file in the server-side:
const result = json2csv({ data });
res.writeHead(200
'Content-Type': 'application/octet-stream',
'Content-Disposition': 'attachment;filename=issues.csv',
'Content-Length': result.length
});
res.end(result);

Answer 4

For those that are using other libraries like angularjs or backbone, you can try something like this.
$('a.download').attr('href', 'data:application/csv;charset=utf-8,'+$scope.data);

Answer 5

For anybody looking for a client-side solution using Javascript only, here is mine, working on any browser except IE 10 and lower (and Edge...why?!):
var uri = 'data:application/csv;charset=UTF-8,' + encodeURIComponent(csv);
var link = document.createElement('a');
link.setAttribute("download", "extract.csv");
link.setAttribute("href", uri);
document.body.appendChild(link);
link.click();
body.removeChild(body.lastChild);