Exception错误处理通用类

Exception，所有异常的基类

1. ErrorException 错误异常类
   1. InternalServerError，500
   2. GatewayTime-out，504
   3. BadGateway，502
2. NotFoundException，404
3. ForbiddenException，403
4. Method Not Allowed，405
5. BadRequestException，400
6. UnauthorizedException，401
7. RequestTimeOutException，408
8. SuccessException，200
9. UpdateException, 204

Java Exception异常类参考 https://docs.spring.io/spring-security/site/docs/current/api/allclasses.html
PHP Exception异常参考 https://www.php.net/manual/zh/language.exceptions.extending.php
http状态码参考 https://www.runoob.com/http/http-status-codes.html

定义好每种异常的 class类，规范好错误信息；需要的时候，直接 new
exception/index.js

const {
  HttpException,
  SuccessException,
  AuthFailedException,
  ForbiddenException,
  NotFoundException
} = require('./http-exception')
const {
  ParameterException,
  LikeException,
  UnlikeException
} = require('./exception')
module.exports = {
  HttpException,
  ParameterException,
  SuccessException,
  AuthFailedException,
  ForbiddenException,
  NotFoundException,
  LikeException,
  UnlikeException
}

Exception.js

把所有的 已知错误封装成 HttpException，只是一个基类，还可以继续定义子类
HttpException extends Error 是为了 throw error 抛出错误
HttpException 默认 500 serverError

const {
  HttpException
} = require('./http-exception')
const {
  parameter,
  likeError,
  unlikeError
} = require('./code-exception')
class ParameterException extends HttpException {
  constructor(message, code) {
    super()
    this.status = parameter.status
    this.code = code || parameter.code
    this.message = message || parameter.message
  }
}
// 点赞
class LikeException extends HttpException {
  constructor(message, code) {
    super()
    this.status = likeError.status
    this.code = code || likeError.code
    this.message = message || likeError.message
  }
}
// 取消点赞
class UnlikeException extends HttpException {
  constructor(message, code) {
    super()
    this.status = unlikeError.status
    this.code = code || unlikeError.code
    this.message = message || unlikeError.message
  }
}
module.exports = {
  ParameterException,
  LikeException,
  UnlikeException
}

HttpException

把所有的 已知错误封装成 HttpException，只是一个基类，还可以继续定义子类
HttpException extends Error 是为了 throw error 抛出错误
HttpException 默认 500 serverError

const {
  success,
  notFound,
  forbidden,
  authFailed
} = require('./code-exception')
const error = {
  code: 1005,
  message: '服务器在忙',
  status: 500
}
// 500 默认
class HttpException extends Error {
  constructor(code= error.code, message=error.message, status=error.status) {
    super()
    this.status = status
    this.code = code
    this.message = message
  }
}
// 200 抛错方式返回成功
class SuccessException extends HttpException {
  constructor(message, code) {
    super()
    this.status = success.status
    this.code = code || success.code
    this.message = message || success.message
  }
}
// 404
class NotFoundException extends HttpException {
  constructor(message, code) {
    super();
    this.status = notFound.status
    this.code = code || notFound.code
    this.message = message || notFound.message
  }
}
// 401
class AuthFailedException extends HttpException {
  constructor(message, code) {
    super()
    this.status = authFailed.status
    this.code = code || authFailed.code
    this.message = message || authFailed.message
  }
}
// 403
class ForbiddenException extends HttpException {
  constructor(message, code) {
    super()
    this.status = forbidden.status
    this.code = code || forbidden.code
    this.message = message || forbidden.message
  }
}
module.exports = {
  HttpException,
  SuccessException,
  AuthFailedException,
  ForbiddenException,
  NotFoundException
}