happner/lib/modules/api/index.js

distributed application engine with evented storage and mesh services

module.exports = Api;

function Api() {
}

Api.prototype.test = function () {
  done(null, message + ' tested ok');
}

Api.prototype.client = function ($happn, req, res) {

  /* serves: /api/client (script) */

  var script = $happn.tools.packages.api;

  if (req.headers['if-none-match'] == script.md5) {

    $happn.log.$$TRACE('client already has latest version ' + req.url);
    res.statusCode = 304; // <---- 304 Not Modified (RFC 7232)
    return res.end();    // <---- send nothing.
  }

  var header = {
    'Content-Type': 'text/javascript',
    'Cache-Control': "max-age=0", // <---- client should always check
    'ETag': script.md5           // <---- etag (see 'if-none-match')
  }

  if (script.gzip) {
    header['Content-Encoding'] = 'gzip'; // <---- script.data is gzipped (flag set in system/widget)
  }

  res.writeHead(200, header);
  $happn.log.$$TRACE('sending latest version ' + req.url);
  res.end(script.data);

}