yaeeh - yet another express error handler

A small library for error handling in express. With Default Api-Errors predefined.

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$ npm install --save yaeeh

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API

Error are classes which inherit from the javascript standard error. Stacktrace etc is given as normal.

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Every error can be instantiated with a custom message and a custom error code like 'ERR_CUSTOM_ERROR_CODE'. The http number codes are fixed to the standard http codes.

`` javascript
/**
* Every error can have alternative messages, alternative error codes or both.
*
* const someError = new Error('alternative message');
* const someError = new Error('alternative message', 'alternative error code');
* const someError = new Error(null, 'alternative error code only');
*/

/**
* NotImplementedError
*
* default status code: 501
* default error code: ERR_NOT_IMPLEMENTED
* default message: This resource is not implemented yet.
*/
const notImplementedError = new NotImplementedError();

/**
* UnauthorizedError
*
* default status code: 401
* default error code: ERR_NOT_AUTHORIZED
* default message: You are not authorized to access this resource.
*/
const unauthorizedError = new UnauthorizedError();

/**
* NotFoundError
*
* default status code: 404
* default error code: ERR_NOT_FOUND
* default message: This requested resource was not found.
*/
const notFoundError = new NotFoundError();

/**
* BadRequestError
*
* default status code: 400
* default error code: ERR_BAD_REQUREST
* default message: Bad request.
*/
const badRequestError = new BadRequestError();
`

###ApiError(message, status, code)

If you need to create completly customized errors with an own http status code you can use the ApiError and extend it or simple create an error with the right parameters.

` javascript
/**
* ApiError
*
* This error type is the base for the error handler and can be completly customized.
*/
const apiError = new ApiError('My very own Api error.', 123, 'ERR_VERY_OWN');

class SomeError extends ApiError {
constructor() {
super('An error with fixed parameters.', 400, 'ERR_FIXED_CODE');
}
}
``

TODOs

- [ ] add more Errors
- [x] export responses for test via supertest for example

License

MIT © Alexander Braunreuther