lib/http/request.js
function (key) {
            if (self.files) {
                return self.files[key] ? self.files[key] : null;
            }
        }
function (key) {
            if (self.files) {
                return self.files[key] ? self.files[key] : null;
            }
        }
function ( key ) { if ( self . files ) { return self . files [ key ] ? self . files [ key ] : null ; } }
Retrieve a file from the request.
@param {String} key
@return {*}
Retrieve a file from the request .