INNER CODE UNIT · JavaScript

middlewareWrapper

expressjs/cors · lib/index.js:192

  function middlewareWrapper(o) {
    // if options are static (either via defaults or custom options passed in), wrap in a function
    var optionsCallback = null;
    if (typeof o === 'function') {
      optionsCallback = o;
    } else {
      optionsCallback = function (req, cb) {
        cb(null, o);
      };
    }

    return function corsMiddleware(req, res, next) {
      optionsCallback(req, function (err, options) {
        if (err) {
          next(err);
        } else {
          var corsOptions = assign({}, defaults, options);
          var originCallback = null;

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