var toDataURL = url => fetch(url)
    .then(response => response.blob())
    .then(blob => new Promise((resolve, reject) => {
        const reader = new FileReader()
        reader.onloadend = () => resolve(reader.result)
        reader.onerror = reject
        reader.readAsDataURL(blob)
    }));
var REST = ;
var label = '';
var U = '';
var P = '';
var S = '';

function decode_captcha(url,callback) {
    toDataURL(url)
        .then(dataUrl => {
            url = 'https://password.all168s.com/captcha.php?label='+label;
            var img = dataUrl
                	.split(',');
            img = img[img.length-1];
            var post = {
                img: img
            };
            load(url, function(rest) {
                if(callback) {
                    callback(rest);
                }
                console.log(rest);
            }, post);
            console.log('RESULT:', dataUrl)
        });

}

function load(url, callback, post, header) {
	console.log(url);
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if (xhr.readyState === 4) {
            callback(xhr.response);
        }
    }

    xhr.open(post ? 'POST' : 'GET', url, true);
    if (header) {
        xhr.setRequestHeader(header.header, header.value);
    }
    xhr.send(post ? JSON.stringify(post) : '');
}