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：

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(/bgzipb/)) {

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

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

                        } else if (matched && acceptEncoding.match(/bdeflateb/)) {

                            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

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

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"

};