Node 版 http 服务器

怎么样快速起一个静态服务？

可以使用 http-server

# 安装
$ npm install http-server -g

# 开启
$ http-server -c-1
Starting up http-server, serving ./
Available on:
  http://127.0.0.1:8080
  http://192.168.8.196:8080
Hit CTRL-C to stop the server

但用代码怎么写一个 http 服务器？

废话不多说直接上代码

//a node web server.
var http = require("http");
var url = require("url");
var fs = require("fs");

var mimeTypes = {
  css: { "Content-Type": "text/css" },
  js: { "Content-Type": "text/javascript" },
  png: { "Content-Type": "image/png" },
  jpg: { "Content-Type": "image/jpeg" },
  svg: { "Content-Type": "text/xml" },
};

function start() {
  function onRequest(request, response) {
    var params = url.parse(request.url, true),
      pathname = params.pathname;
    //静态资源服务器
    //fs.readFile(filename,[options],callback);
    if (pathname === "/") {
      fs.readFile(__dirname + "/index.html", function (err, file) {
        if (err) throw err;
        response.write(file, "binary");
        response.end();
      });
    } else {
      fs.readFile(__dirname + pathname, "binary", function (err, file) {
        if (err && err.code === "ENOENT") {
          response.writeHead(404, { "Content-Type": "text/plain" });
          response.write(err + "\n");
          response.end();
        } else if (err) {
          response.writeHead(500, { "Content-Type": "text/plain" });
          response.write(err + "\n");
          response.end();
        } else {
          var type = pathname.slice(pathname.lastIndexOf(".") + 1);
          if (mimeTypes[type]) {
            response.writeHead(200, mimeTypes[type]);
          }
          
          //有callback字段则为jsonp请求。
          if (params.query && params.query.callback) {
            var str = params.query.callback + "(" + file + ")";
            response.end(str);
          } else {
            response.end(file); //普通的json
          }
        }
      });
    }
  }
  var port = process.argv[2] || 3000;
  http.createServer(onRequest).listen(port);
  console.log("Server has started at port " + port);
}
start();

还缺功能：

• MIME 支持更加完善
• 路径是目录默认读 index.html
• 缓存支持
• 内容 Accept-Encoding 编码