Giacomo Balli profile picture

Giacomo Balli

Innovation consultant specializing in mobile strategy

Let's Chat

Get API or File Size


This code sample will allow you to retrieve the size of a file or API response without actually downloading it (server needs to provide Content-Length header).



function getApiSize(url) {
var req = new XMLHttpRequest();
req.open("HEAD", url, false);
req.send(null);
console.log(req.getResponseHeader('Content-Length'));
}

Directions:

- Call getApiSize(url); and you will see the size in your console.


Note:
This snippet focuses on iOS development. Make sure to verify/adapt any vendor prefixes.

Back to main listing.

Published: Mon, 11 Jan 2016 02:48:03 +0000