var util = require('util') var errorMessages = { LIMIT_PART_COUNT: 'Too many parts', LIMIT_FILE_SIZE: 'File too large', LIMIT_FILE_COUNT: 'Too many files', LIMIT_FIELD_KEY: 'Field name too long', LIMIT_FIELD_VALUE: 'Field value too long', LIMIT_FIELD_COUNT: 'Too many fields', LIMIT_UNEXPECTED_FILE: 'Unexpected field' } function MulterError (code, field) { Error.captureStackTrace(this, this.constructor) this.name = this.constructor.name this.message = errorMessages[code] this.code = code if (field) this.field = field } util.inherits(MulterError, Error) module.exports = MulterError