node.js(nest.js控制器)学习笔记

nest.js控制器： 控制器负责处理传入请求并向客户端返回响应。
为了创建基本控制器，我们使用类和装饰器。装饰器将类与所需的元数据相关联，并使 Nest 能够创建路由映射（将请求绑定到相应的控制器）。

1.获取get请求传参，用@Request装饰器或者@Query()装饰器

import {Controller,Get,Request,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1', //版本控制
})
export class WeiController {constructor(private readonly weiService: WeiService) { }// @Request装饰器@Get()findAll(@Request() req) {console.log('@', req.query)return {code: 200,message: '请求成功W'}}
}

import {Controller,Get,Query,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1', //版本控制
})
export class WeiController {constructor(private readonly weiService: WeiService) { }// @Query()装饰器@Get()findAll(@Query() query) {console.log('@@', query)return {code: 200,message: '请求Q成功'}}
}

2.post请求获取参数,用@Request装饰器或者@Body 装饰器

import {Controller,Get,Query,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1',
})
export class WeiController {constructor(private readonly weiService: WeiService) { }//用@Request装饰器@Post()create(@Request() req) {console.log(req.body)return {code: 200,message: '请求成功！'}}
}

import {Controller,Get,Query,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1',
})
export class WeiController {constructor(private readonly weiService: WeiService) { }//用@Body装饰器@Post()create(@Body() body) {console.log(body)return {code: 200,message: '请求成功！'}}
}

读取请求体中得key值

import {Body,Controller,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1',
})
export class WeiController {constructor(private readonly weiService: WeiService) { }// 读取key@Post()create(@Body("title") body) {console.log(body)return {code: 200,message: '请求成功'}}
}

动态传参使用 Request装饰器 或者 Param 装饰器

import {Controller,Request,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1',
})
export class WeiController {constructor(private readonly weiService: WeiService) { }// 动态路由// Request装饰器 或者 Param 装饰器@Get(':id')findId(@Request() req) {console.log('@@@@@@', req.params)return {code: 200,message: '请求成功！！！！！！'}}
}

header信息读取使用@header装饰器

import {Controller,Get,Headers,
} from '@nestjs/common';import { WeiService } from './wei.service';@Controller({path: 'wei',version: '1',
})
export class WeiController {constructor(private readonly weiService: WeiService) { }// 读取header 信息@Get(':id')findId(@Headers() header) {console.log('header', header)return {code: 200,message: '请求成功！！！！！！'}}
}