NODEJS[27]:http模块_完善错误处理

const http = require("http");
const fs = require("fs");
const path = require("path");
let mimes = {
  html: "text/html",
  css: "text/css",
  js: "text/javascript",
  png: "image/png",
  jpg: "image/jpeg",
  git: "image/gif",
  mp4: "video/mp4",
  mp3: "audio/mp3",
  json: "application/json",
};
const server = http.createServer((request, response) => {
  if (request.method !== "GET") {
    response.statusCode = 405;
    response.end("<h1>405 Method Not Allowed</h1>");
    return;
  }
  let { pathname } = new URL(request.url, "http://127.0.0.1");
  let filePath = __dirname + "/page" + pathname;
  fs.readFile(filePath, (err, data) => {
    if (err) {
      response.setHeader("content-type", "text/html;charset=utf-8");
      switch (err.code) {
        case "ENOENT":
          response.statusCode = 404;
          response.end("<h1>404 Not Found</h1>");
        case "EPERM":
          response.statusCode = 403;
          response.end("<h1>403 Forbidden</h1>");
        default:
          response.statusCode = 500;
          response.end("<h1>Internal Server Error</h1>");
      }
      return;
    }
    let ext = path.extname(filePath).slice(1);
    response.setHeader(
      "content-type",
      mimes[ext] || "application/octet-stream" + ";charset=utf-8"
    );
    response.end(data);
  });
});
server.listen(9000, () => {
  cons.log("服务器已经启动了...");
});