一、使用 `http` 模块处理请求方法

1. 创建 HTTP 服务器

const http = require("http");const server = http.createServer((req, res) => {// 处理不同的请求方法switch (req.method) {case "GET":handleGetRequest(req, res);break;case "POST":handlePostRequest(req, res);break;case "PUT":handlePutRequest(req, res);break;case "DELETE":handleDeleteRequest(req, res);break;default:handleUnsupportedMethod(req, res);}});// 监听端口server.listen(3000, () => {console.log("Server running on port 3000");});

2. 处理 GET 请求

function handleGetRequest(req, res) {// 设置响应头res.writeHead(200, { "Content-Type": "text/plain" });// 发送响应内容res.end("This is a GET request");}

3. 处理 POST 请求

function handlePostRequest(req, res) {let body = "";// 接收请求体数据req.on("data", (chunk) => {body += chunk.toString();});req.on("end", () => {// 设置响应头res.writeHead(200, { "Content-Type": "text/plain" });// 发送响应内容res.end(`This is a POST request with body: ${body}`);});}

4. 处理 PUT 请求

function handlePutRequest(req, res) {let body = "";req.on("data", (chunk) => {body += chunk.toString();});req.on("end", () => {// 设置响应头res.writeHead(200, { "Content-Type": "text/plain" });// 发送响应内容res.end(`This is a PUT request with body: ${body}`);});}

5. 处理 DELETE 请求

function handleDeleteRequest(req, res) {// 设置响应头res.writeHead(200, { "Content-Type": "text/plain" });// 发送响应内容res.end("This is a DELETE request");}

6. 处理不支持的请求方法

function handleUnsupportedMethod(req, res) {// 设置响应头res.writeHead(405, { "Content-Type": "text/plain" });// 发送响应内容res.end("Method Not Allowed");}

二、使用 `express` 框架处理请求方法

1. 安装 `express` 框架

npm install express

2. 创建 `express` 服务器

const express = require("express");const app = express();// 处理 GET 请求app.get("/", (req, res) => {res.send("This is a GET request");});// 处理 POST 请求app.post("/", (req, res) => {res.send("This is a POST request");});// 处理 PUT 请求app.put("/", (req, res) => {res.send("This is a PUT request");});// 处理 DELETE 请求app.delete("/", (req, res) => {res.send("This is a DELETE request");});// 监听端口app.listen(3000, () => {console.log("Server running on port 3000");});