Function headersGetter

OpenReservation/wwwroot/Scripts/angular.js:10468–10484

* Returns a function that provides access to parsed headers. * * Headers are lazy parsed when first requested. * @see parseHeaders * * @param {(string|Object)} headers Headers to provide access to. * @returns {function(string=)} Returns a getter function which if called

(headers)

     *   - if called with no arguments returns an object containing all headers.
     */
    function headersGetter(headers) {
        var headersObj;

        return function (name) {
            if (!headersObj) headersObj = parseHeaders(headers);

            if (name) {
                var value = headersObj[lowercase(name)];
                if (value === void 0) {
                    value = null;
                }
                return value;
            }

            return headersObj;
        };
    }

    /**
     * Chain all given functions