怎样用 koa-bodyparser 获取 POST 请求上下文中的表单数据

index.js

const Koa = require("koa");
const bodyParser = require("koa-bodyparser");

const app = new Koa();

app.use(bodyParser());
app.use(async (ctx) => {
  ctx.body = ctx.request.body;
});

app.listen(3000);