Fasteer.js Exceptions

Exceptions for Fasteer.js

Available Exceptions

• Exception
  • HttpException
    • ForbiddenException
      • RatelimitedException
    • UnauthorizedException
    • UserInputException
      • NotFoundException
    • ValidationException

Features

• Sends appropriate error responses
  • no need for duplicating code
• You can make custom exceptions and handle the response with sendError(reply: FastifyReply) & toError()

Getting started

Installation

npm i @fasteerjs/exceptions
# or if you are using Yarn
yarn add @fasteerjs/exceptions

Registering

This package has it's own error handler, which you can extend with your logic.

import { hookFastify } from "@fasteerjs/fasteer"
import { createExceptionHandler } from "@fasteerjs/exceptions"

const fasteer = hookFastify({
  // ... your options
  errorHandler: createExceptionHandler(),
})

or you can register it as a plugin:

import { hookFastify } from "@fasteerjs/fasteer"
import fasteerExceptions from "@fasteerjs/exceptions"

const fasteer = hookFastify({
  //
})

fasteer.plugin(fasteerExceptions())

Additionally, you can add your own error handler:

import { hookFastify } from "@fasteerjs/fasteer"
import fasteerExceptions, {
  createExceptionHandler,
} from "@fasteerjs/exceptions"

// BAD
const fasteer = hookFastify({
  errorHandler: (err, req, res) => {},
})

// GOOD
const fasteer = hookFastify({
  // err is in this case FasteerError
  errorHandler: createExceptionHandler({ errorHandler: (err, req, res) => {} }),
})

// GOOD
// works same as above
fasteer.plugin(fasteerExceptions({ errorHandler: (err, req, res) => {} }))

Custom Exceptions

You can create custom exceptions by extending the Exception class (or other exceptions). In the Exception class, there are two functions: toError() and sendError(res: FastifyReply):

• toError creates an object which will be sent as the response.
• The sendError function by default sends the return value of the toError function. You can change the logic if you need FastifyReply.

TypeScript Types

FasteerError extends FastifyError

FasteerError is FastifyError with added isException() function. Additionally, there is a FasteerExceptionError, which also has the the properties of Exception.

FasteerExceptionError

This is FasteerError combined with Exception.

License

This project is licensed under the MIT license.

2022 © Mia Lilian Morningstar – All rights reserved