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！！！！！！'
    }
  }
}