Nginx Proxy with JS

proxy.js

function handleRequest(r) {
    var t = '/path/to/cookies.txt',
        e = readCookiesFromFile(r, t);
    r.headersOut.Cookie = e;
    var a = buildTargetUrl(r, 'http://ex.com'),
        o = createProxyRequest(r, a),
        s = r.subrequest(o);
    handleProxyResponse(r, s)
}

function readCookiesFromFile(r, t) {
    var e = '';
    try {
        e = r.file.read(t)
    } catch (a) {
        r.error('Error reading cookies file: ' + a.toString())
    }
    return e.trim()
}

function buildTargetUrl(r, t) {
    return (t + r.uri).replace(/http:\/\/ex\.com/g, 'http://yoursite.com')
}

function createProxyRequest(r, t) {
    return {
        method: r.method,
        uri: t,
        headers: r.headersIn,
        body: r.requestBody,
        subrequest: !0
    }
}

function handleProxyResponse(r, t) {
    t.status == 200 ? r.return(200, t.responseText) : r.return(500, 'Internal Server Error')
}
export default {
    handleRequest
};