NestJS入门6：日志中间件

前文参考：

1. 安装

bash 复制代码

nest g middleware logger middleware

2. logger.middleware.ts修改

logger.middleware.ts修改为：

TypeScript 复制代码

import { Injectable, NestMiddleware } from '@nestjs/common';
import { Request, Response } from 'express';

@Injectable()
export class LoggerMiddleware implements NestMiddleware {
  use(req: Request, res: Response, next: () => void) {
    const {method, path} = req;
    console.log(`${method} ${path}`);
    next();
  }
}

3. app.modules.ts修改

app.modules.ts修改为：

TypeScript 复制代码

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { UserModule } from "./user/user.module";
import { TypeOrmModule } from "@nestjs/typeorm";
import { LoggerMiddleware } from './middleware/logger/logger.middleware';
import { MiddlewareBuilder } from '@nestjs/core';

@Module({
  imports: [UserModule,
    TypeOrmModule.forRoot({
      type: "mysql",
      host: "localhost",
      port: 3306,
      username: "root",
      password: "root",
      database: "user", //数据库名称
      entities: ["dist/**/*.entity{.ts,.js}"], //扫描本项目中.entity.ts或者.entity.js的文件
      synchronize: true,
    }),],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {
  configure(consumer: MiddlewareBuilder){

    consumer.apply(LoggerMiddleware).forRoutes('user');
  }



}

可改为星号通配符，表示任意路由

TypeScript 复制代码

consumer.apply(LoggerMiddleware).forRoutes('*');

4. 测试

使用postman或swagger测试，后端可以看到请求方法与路径的打印