用 node.js 搭建简单的 web 服务器

const express = require("express");
const app = express();
const bodyParser = require("body-parser");
const port = 3000;

app.all("*", function(_, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Content-Type");
  res.header("Access-Control-Allow-Methods", "*");
  res.header("Content-Type", "application/json;charset=utf-8");
  next();
});

app.use(bodyParser.urlencoded({ extended: false }));

app.use(bodyParser.json({ type: "application/*+json" }));

app.get("/", (_, res) => res.send("Hello World!"));

app.post("*", function(req, res) {
  console.log(req.body);
  res.json(req.body);
});

app.listen(port, () => console.log(`Web 服务器正运行在 ${port} 端口!`));