vhost main function

vhost.js

/**
 * Create a vhost middleware.
 *
 * @param {string|RegExp} hostname
 * @param {function} handle
 * @return {Function}
 * @public
 */

function vhost(hostname, handle) {
  if (!hostname) {
    throw new TypeError('argument hostname is required')
  }

  if (!handle) {
    throw new TypeError('argument handle is required')
  }

  if (typeof handle !== 'function') {
    throw new TypeError('argument handle must be a function')
  }

  // create regular expression for hostname
  var regexp = hostregexp(hostname)

  return function vhost(req, res, next) {
    var vhostdata = vhostof(req, regexp)

    if (!vhostdata) {
      return next()
    }

    // populate
    req.vhost = vhostdata

    // handle
    handle(req, res, next)
  }
}