小满nestjs（第八章 nestjs 控制器）

Controller Request （获取前端传过来的参数）

nestjs 提供了方法参数装饰器 用来帮助我们快速获取参数 如下

@Request()	req
@Response()	res
@Next()	next
@Session()	req.session
@Param(key?: string)	req.params/req.params[key]
@Body(key?: string)	req.body/req.body[key]
@Query(key?: string)	req.query/req.query[key]
@Headers(name?: string)	req.headers/req.headers[name]
@HttpCode

调试工具可以使用postMan  ApiFox 等

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1.获取get请求传参

可以使用Request装饰器 或者 Query 装饰器 跟express 完全一样

 也可以使用Query 直接获取 不需要在通过req.query 了

import { Controller, Get, Post, Body, Patch, Param, Delete, Version, Request, Query } from '@nestjs/common';
import { UserService } from './user.service';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';

@Controller('user')
export class UserController {
  constructor(private readonly userService: UserService) { }

  @Get()
  find(@Query() query) {
    console.log(query)
    return { code: 200 }
  }
}

2.post 获取参数

 可以使用Request装饰器 或者 Body 装饰器 跟express 完全一样

或者直接使用Body 装饰器

  

也可以直接读取key

 

import { Controller, Get, Post, Body, Patch, Param, Delete, Version, Request, Query } from '@nestjs/common';
import { UserService } from './user.service';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';

@Controller('user')
export class UserController {
  constructor(private readonly userService: UserService) { }

  @Get()
  find(@Query() query) {
    console.log(query)
    return { code: 200 }
  }

  @Post()
  create (@Body() body) {
     
    console.log(body)

    return {
       code:200
    }
  }
}

3.动态路由

 可以使用Request装饰器 或者 Param 装饰器 跟express 完全一样

 

import { Controller, Get, Post, Body, Patch, Param, Delete, Version, Request, Query } from '@nestjs/common';
import { UserService } from './user.service';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';

@Controller('user')
export class UserController {
  constructor(private readonly userService: UserService) { }

  @Get()
  find(@Query() query) {
    console.log(query)
    return { code: 200 }
  }

  @Post()
  create (@Body('name') body) {
     
    console.log(body)

    return {
       code:200
    }
  }

  @Get(':id')
  findId (@Param() param) {
     
    console.log(param)

    return {
       code:200
    }
  }
}

4.读取header 信息

我在调试工具随便加了一个cookie

import { Controller, Get, Post, Body, Patch, Param, Delete, Version, Request, Query, Ip, Header, Headers } from '@nestjs/common';
import { UserService } from './user.service';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';

@Controller('user')
export class UserController {
  constructor(private readonly userService: UserService) { }

  @Get()
  find(@Query() query) {
    console.log(query)
    return { code: 200 }
  }

  @Post()
  create (@Body('name') body) {
     
    console.log(body)

    return {
       code:200
    }
  }

  @Get(':id')
  findId (@Headers() header) {
     
    console.log(header)

    return {
       code:200
    }
  }
}

5.状态码

使用 HttpCode 装饰器 控制接口返回的状态码 

import { Controller, Get, Post, Body, Patch, Param, Delete, Version, Request, Query, Ip, Header, Headers, HttpCode } from '@nestjs/common';
import { UserService } from './user.service';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';

@Controller('user')
export class UserController {
  constructor(private readonly userService: UserService) { }

  @Get()
  find(@Query() query) {
    console.log(query)
    return { code: 200 }
  }

  @Post()
  create (@Body('name') body) {
     
    console.log(body)

    return {
       code:200
    }
  }

  @Get(':id')
  @HttpCode(500)
  findId (@Headers() header) {
    return {
       code:500
    }
  }
}