app.js

gistfile1.txt

/**
 * Module dependencies
 */

var stack = require('simple-stack-ui');
var envs = require('envs');
var qs = require('qs');

var app = module.exports = stack({
  restricted: false
});

app.locals({
  title: 'Advanced Reports'
});

/**
 * Setup app-wide locals
 */

app.env('API_URL', '/api');

/**
 * Hackity hack for rewriting header.
 */

var base_idx = app.indexOf('base');
var api_idx = app.indexOf('api-proxy');
app.stack.splice(api_idx, 0, app.stack.splice(base_idx, 1)[0]);

app.useBefore('api-proxy', '/api', 'api-cookies', stack.middleware.cookieParser());

var apiUrl = new RegExp(envs('API_URL'), 'g');

app.useBefore('api-proxy', '/api', 'proxy-rewrite', function(req, res, next) {
  var buf = [];
  var write = res.write;
  var end = res.end;
  var writeHead = res.writeHead;

  req.cookies._access_token = envs('ACCESS_TOKEN');

  if (req.cookies._access_token) req.headers.authorization = 'Bearer ' + req.cookies._access_token;

  res.set('cache-control', 'max-age=3600');

  res.writeHead = function(code, headers) {
    if (headers) delete headers['content-length'];
    writeHead.apply(this, arguments);
  };


  res.end = function(data, encoding, cb) {
    if (data) buf.push(data.toString());
    var newData = buf.join('').replace(apiUrl, req.base + '/api');
    newData = newData.replace(/data\/(give|receive|utilization|reach)"/g, function(match, type) {
      return 'data/' + type + '?' + qs.stringify(req.query) + '"';
    }).replace(/(beginDate|endDate)\":{\"type\":\"hidden\",/g, function(match, type) {
      return type + '":{';
    });
    end.apply(this, [newData, encoding, cb]);
  };

  res.write = function(data, encoding, cb) {
    buf.push(data.toString());
    write.apply(this, ['', encoding, cb]);
  };

  next();
});