Nodejs实现的一个静态服务器实例

  参考cnodejs.org上面的静态服务器例子,写了下面的一个nodejs静态服务器例子,里面包含cache,压缩,贴代码如下:

  

复制代码 代码如下:

  /**

  * 静态文件服务器测试例子

  * User: xuwm

  * Date: 13-5-17

  * Time: 上午8:38

  * To change this template use File | Settings | File Templates.

  */

  var port=3333;

  var http = require("http");

  var url = require("url");

  var fs = require("fs");

  var path = require("path");

  var mime = require("./mime").types;

  var config = require("./config");

  var zlib = require("zlib");

  //创建http服务端

  var server=http.createServer(function(request,response){

  var obj= url.parse(request.url);

  response.setHeader("Server","Node/V8");

  console.log(obj);

  var pathname=obj.pathname;

  if(pathname.slice(-1)==="/"){

  pathname=pathname+config.Welcome.file;   //默认取当前默认下的index.html

  }

  var realPath = path.join("assets", path.normalize(pathname.replace(/\.\./g, "")));

  console.log(realPath) ;

  var pathHandle=function(realPath){

  //用fs.stat方法获取文件

  fs.stat(realPath,function(err,stats){

  if(err){

  response.writeHead(404,"not found",{'Content-Type':'text/plain'});

  response.write("the request "+realPath+" is not found");

  response.end();

  }else{

  if(stats.isDirectory()){

  }else{

  var ext = path.extname(realPath);

  ext = ext ? ext.slice(1) : 'unknown';

  var contentType = mime[ext] || "text/plain";

  response.setHeader("Content-Type", contentType);

  var lastModified = stats.mtime.toUTCString();

  var ifModifiedSince = "If-Modified-Since".toLowerCase();

  response.setHeader("Last-Modified", lastModified);

  if (ext.match(config.Expires.fileMatch)) {

  var expires = new Date();

  expires.setTime(expires.getTime() + config.Expires.maxAge * 1000);

  response.setHeader("Expires", expires.toUTCString());

  response.setHeader("Cache-Control", "max-age=" + config.Expires.maxAge);

  }

  if (request.headers[ifModifiedSince] && lastModified == request.headers[ifModifiedSince]) {

  console.log("从浏览器cache里取")

  response.writeHead(304, "Not Modified");

  response.end();

  } else {

  var raw = fs.createReadStream(realPath);

  var acceptEncoding = request.headers['accept-encoding'] || "";

  var matched = ext.match(config.Compress.match);

  if (matched && acceptEncoding.match(/\bgzip\b/)) {

  response.writeHead(200, "Ok", {'Content-Encoding': 'gzip'});

  raw.pipe(zlib.createGzip()).pipe(response);

  } else if (matched && acceptEncoding.match(/\bdeflate\b/)) {

  response.writeHead(200, "Ok", {'Content-Encoding': 'deflate'});

  raw.pipe(zlib.createDeflate()).pipe(response);

  } else {

  response.writeHead(200, "Ok");

  raw.pipe(response);

  }

  }

  }

  }

  });

  }

  pathHandle(realPath);

  });

  server.listen(port);

  console.log("http server run in port:"+port);

  首先需要在JS文件里创建一个assets的文件夹,里面放入你要浏览的静态文件,比如,index.html,demo.js等。

  运行方式为:在命令行里切换到上面的JS的文件目录,然后输入 node JS文件名

  浏览器内输入http://localhost:3333/就会看到效果。

  --补上上面代码里缺少的两个模块

  mime.js

  

复制代码 代码如下:

  exports.types = {

  "css": "text/css",

  "gif": "image/gif",

  "html": "text/html",

  "ico": "image/x-icon",

  "jpeg": "image/jpeg",

  "jpg": "image/jpeg",

  "js": "text/javascript",

  "json": "application/json",

  "pdf": "application/pdf",

  "png": "image/png",

  "svg": "image/svg+xml",

  "swf": "application/x-shockwave-flash",

  "tiff": "image/tiff",

  "txt": "text/plain",

  "wav": "audio/x-wav",

  "wma": "audio/x-ms-wma",

  "wmv": "video/x-ms-wmv",

  "xml": "text/xml"

  };

  config.js

  

复制代码 代码如下:

  exports.Expires = {

  fileMatch: /^(gif|png|jpg|js|css)$/ig,

  maxAge: 60 * 60 * 24 * 365

  };

  exports.Compress = {

  match: /css|js|html/ig

  };

  exports.Welcome = {

  file: "index.html"

  };