中间件｜全局Error处理

import { Provide, Config } from '@midwayjs/decorator';
import { IWebMiddleware, IMidwayWebNext } from '@midwayjs/web';
import { Context } from 'egg';
import { TypeORMError } from 'typeorm';
import { nok } from '../utils/res';
import APIError from '../error/APIError';
@Provide()
export class ApiErrorMiddleware implements IWebMiddleware {
  @Config()
  isProd: boolean;
  resolve() {
    return async (ctx: Context, next: IMidwayWebNext) => {
      try {
        await next();
      } catch (error) {
        console.info('----------  全局异常捕获  ----------');
        console.error(error);
        const { message = '程序异常' } = error;
        let { stack } = error;
        if (this.isProd) {
          // 正式环境不要显示 堆栈信息
          stack = undefined;
        } else {
          if (stack?.split) {
            // 分行，方便查看
            stack = stack.split('\n');
          }
        }
        if (error instanceof APIError) {
          return (ctx.body = nok(message, stack, error.code));
        }
        if (error instanceof TypeORMError) {
          return (ctx.body = nok('数据操作错误', stack, 500));
        }
        ctx.body = nok(message, stack, 500);
      }
    };
  }
}