To fetch binary data and convert to base64, do the following:
Fetch binary data by set responseType = "arraybuffer" for XHR. Make sure to
read response and NOTresponseText.
After you have the response, I thought simply using btoa(response) will do the
base64 conversion. But it does not work.
Instead, a custom function needs to be used for reason I don't know. Below is the
function taken from here:
function arrayBufferToBase64(buffer) {
var binary = "";
var bytes = new Uint8Array( buffer );
var len = bytes.byteLength;
for (var i = 0; i < len; i++) {
binary += String.fromCharCode( bytes[ i ] );
}
return window.btoa( binary );
}
To fetch binary data and convert to base64, do the following:
Fetch binary data by set
responseType = "arraybuffer"for XHR. Make sure to readresponseand NOTresponseText.After you have the response, I thought simply using
btoa(response)will do the base64 conversion. But it does not work.Instead, a custom function needs to be used for reason I don't know. Below is the function taken from here: