/*
Binds to the default frux handler.
The default frux handler will handle incoming POST request with:
body.action -> the action we want to process.
body.payload -> the payload we want to attach to it.
If action is not specified, we fail.
function setCors(req, res, verb) {
    let dom = this[config].cors;
    if (dom === true) {
      dom = req.headers['origin'] || '*';
    } else if (dom instanceof Array) {
      if (!req.headers['origin']) {
        dom = false;
      } else {
        let found = false;
        for (let i = 0, len = dom.length; i < len; i++) {
          if (dom[i].indexOf(req.headers['origin']) === -1) continue;
          found = true;
          dom = dom[i];
          break;
        }
        if (!found) return;
      }
    }
    // CHECK if we have corsIgnore in settings
    let ignoreHosts;
    if (typeof this[config].corsIgnore === 'string') {
      ignoreHosts = [this[config].corsIgnore];
    } else if (this[config].corsIgnore instanceof Array) {
      ignoreHosts = this[config].corsIgnore;
    }
    if (ignoreHosts instanceof Array) {
      let origin = getRawOrigin(dom);
      for (let i = 0; i < ignoreHosts.length; i++) {
        let domain = ignoreHosts[i],
          isMatch = matchCorsOrigin(domain, origin, dom);
        if (isMatch) return;
      }
    }
    if (!dom) return;
    res.header('Access-Control-Allow-Origin', dom);
    res.header('Access-Control-Allow-Methods', verb.toUpperCase() + ', OPTIONS');
    res.header('Access-Control-Allow-Credentials', 'true');
    res.header('Access-Control-Allow-Headers', req.headers['access-control-request-headers'] || '*');
    res.header('Access-Control-Max-Age', '600');
  }