middleware.js

exports.flex_get = function(key, secret, path) {
  return function(req, res, next) {
    var apisig = crypto.createHash('md5').update(secret + 'ApiKey' + key + 'ServicePath/v1' + path + 'AuthToken' + req.flex_auth_token).digest('hex');
    var options = {
      host: 'api.website.com',
      port: 443,
      path: '/v1' + path + '?AuthToken=' + req.flex_auth_token + '&ApiSig=' + apisig,
      method: 'GET'
    };
    var request = https.request(options, function(response) {
      response.setEncoding('utf8');
      var body = '';
      response.on('data', function(d) {
        body += d;
      });
      response.on('end',function(){
        req.flex_data = body;
        next();
      });
    });
    request.end();
    request.on('error', function(e) {
      console.error(e);
    });
  }
}