koa post | put 请求 body 参数

对于 post | put 请求，需要使用 koa-bodyparser 解析后 会得到 ctx.request.body

pnpm add koa-bodyparser --save
pnpm add @types/koa-bodyparser -D

src/index.ts

import Koa from "koa";
import BodyParser from "koa-bodyparser"; 
import router from "./config/router"; 

const app = new Koa();

app
  .use(BodyParser())        
  .use(router.routes())  
  .use(router.allowedMethods()) 
  .listen(3000, async () => {
    console.log(`服务启动成功: http://localhost:3000`);
});

解析 body 处理

使用 zod 进行可进行参数校验，以及类型转换,并封装工具类 src/utils/RequestUtils.ts

src/utils/RequestUtils.ts

import { Context } from "koa";
import { parseBySchema } from "./schemaValidator";
import { ZodObject } from "zod";

function getRequestParams<T extends unknown>(ctx: Context, schema: ZodObject<any>): T {
  return parseBySchema<T>(ctx.params, schema)
}
function getRequestQuery<T extends unknown>(ctx: Context, schema: ZodObject<any>): T {
  return parseBySchema<T>(ctx.query, schema)
}

function getRequestBody<T extends unknown>(ctx: Context, schema: ZodObject<any>): T {
  return parseBySchema<T>(ctx.request.body, schema)
}

function getRequestUser(ctx: Context) {
  try {
    if (ctx.state.user) {
      return ctx.state.user as ILoginUser
    }
    throw new Error('用户未登录:401')
  } catch (error) {
    throw new Error(error.message)
  }
}

export default {
  getRequestParams,
  getRequestQuery,
  getRequestBody,
  getRequestUser,
}