Node.js请求与代理

Question

当尝试在node.js请求模块中使用代理时，出现以下错误：

Error: tunneling socket could not be established, cause=getaddrinfo ENOTFOUND http http:80

function doVote(username, captchaKey, proxy, csrf){
    console.log(proxy);
    rp({
        uri: "<url>",
        proxy: "http://" + proxy,
        method: 'POST',
        family: 4,
        form: {
            "username": username
        },
        headers: {
            'User-Agent': "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36"
        }}).then(body => {
            console.log(body);
            console.log(`Site returned Response Code ${httpResponse.statusCode}`)
            if(body.includes("The CAPTCHA needs to be solved.")){
                console.log("Couldn't send vote!");
            } else {
                console.log("Voted!");
            }
        }).catch(err => {
            console.log("===================================");
            console.log(err);
            console.log("===================================");
        });
}

我基本上希望将带有用户名的请求发送到网站。 谢谢！