text: const superagent = require('superagent');
  const getProxyForUrl = require('proxy-from-env').getProxyForUrl;
  
  // extend with Request#proxy()
  require('superagent-proxy')(superagent);
  
  module.exports = (remoteUrl, callback) => {
      const proxyUrl = getProxyForUrl(remoteUrl);
  
      const superagentCallback = (err, resp) => {
          if (err) {
              return callback(err);
          } else if (resp.ok) {
              return callback(null, resp.text);
          }
          return callback(new Error(`GET ${remoteUrl} ${resp.status}`));
      };
  
      if (proxyUrl) {
          superagent.get(remoteUrl).proxy(proxyUrl).buffer().end(superagentCallback);
      } else {
          superagent.get(remoteUrl).buffer().end(superagentCallback);
      }
  };
  