加载外部二进制数据作为数据url

Posted 2021-02-24

var xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET",url,false);
xmlhttp.overrideMimeType('text/plain; charset=x-user-defined');
xmlhttp.send();
var data = '';
for ( var i = 0; i < xmlhttp.responseText.length; i++ ) data += String.fromCharCode( ( xmlhttp.responseText[ i ].charCodeAt(0) & 0xff ) );
// Convert raw data to base64
data = btoa( data );
var base64src='data:image/jpg;base64,'+data;  // change the MIME type according to content