node搭建简易服务器
如果完全用node做所有服务器端的事情，http://expressjs.com/框架是一个很好的选择，不过我们也可以在一些简易的应用场景使用node
root # node server.js
如果server.js被修改后，需要重新启动服务器才能生效，这点很不方便，不过supervisor可以很好地解决
安装supervisor，它会监控目录的服务文件有无变化(如果编辑后文件有语法错误，服务就没法运行了，所以要特别注意)
npm install supervisor -g
root:~/test # supervisor server.jsDEBUG: Running node-supervisor withDEBUG: program 'server.js'DEBUG: --watch '.'DEBUG: --ignore 'undefined'DEBUG: --extensions 'node|js'DEBUG: --exec 'node'DEBUG: Starting child process with 'node server.js'DEBUG: Watching directory '/root/test' for changes.Server running at http://127.0.0.1:8080/DEBUG: crashing childDEBUG: Starting child process with 'node server.js'Server running at http://127.0.0.1:8080/
简单的Hello World服务器（simple.js）
var http = require('http');// create http serverhttp.createServer(function (req, res) { // content header res.writeHead(200, {'content-type': 'text/plain'}); // write message and signal communication is complete res.end("Hello, World!\n"); }).listen(8124);console.log('Server running on 8124/');简单的http客户端(client.js)
var http = require('http');//The url we want, plus the path and options we needvar options = {host: 'localhost', port: 8124, path: '/?file=secondary', method: 'GET'};var processPublicTimeline = function(response) { // finished? ok, write the data to a file console.log('finished request' + response); console.log('STATUS: ' + response.statusCode); console.log('HEADERS: ' + JSON.stringify(response.headers)); response.on('data', function (chunk) { console.log('BODY: ' + chunk); });};for (var i = 0; i < 5; i++) { // make the request, and then end it, to close the connection http.request(options, processPublicTimeline).end();}post数据代码如下
var http = require('http'), qs = require('qs');//The url we want, plus the path and options we needvar options = { host: '127.0.0.1', port: 8080, path: '/add', method: 'POST'};var postdata = qs.stringify({username:"User",password:"Password"});var processPublicTimeline = function(response) { var body=''; response.on('data', function (chunk) { body += chunk; }); response.on('end',function() { console.log(body); }); response.on('error', function(e) { console.log('problem with request: ' + e.message); });};var req = http.request(options, processPublicTimeline);req.write(postdata);req.end();复杂服务器：支持静态文件服务以及自定义handler处理
var http = require("http"), url = require("url"), path = require("path"), fs = require("fs");var handle = {}handle["/"] = rootHandler;handle["/add"] = addHandler;handle["/save"] = saveHandler;http.createServer(function (req, res) { var pathname=url.parse(req.url).pathname; if(typeof handle[pathname] === "function"){ handle[pathname](res, req); } else { pathname=__dirname+url.parse(req.url).pathname; if (path.extname(pathname)=="") { pathname+="/"; } if (pathname.charAt(pathname.length-1)=="/"){ pathname+="index.html"; } fs.exists(pathname,function(exists){ if(exists){ switch(path.extname(pathname)){ case ".html": res.writeHead(200, {"Content-Type": "text/html"}); break; case ".js": res.writeHead(200, {"Content-Type": "text/javascript"}); break; case ".css": res.writeHead(200, {"Content-Type": "text/css"}); break; case ".gif": res.writeHead(200, {"Content-Type": "image/gif"}); break; case ".jpg": res.writeHead(200, {"Content-Type": "image/jpeg"}); break; case ".png": res.writeHead(200, {"Content-Type": "image/png"}); break; default: res.writeHead(200, {"Content-Type": "application/octet-stream"}); } fs.readFile(pathname,function (err,data){ res.end(data); }); } else { res.writeHead(404, '404 Not Found', {'Content-Type': 'text/html'}); res.end('<h1>404 Not Found</h1>'); } }); }}).listen(8080, "0.0.0.0");console.log("Server running at http://0.0.0.0:8080/");function rootHandler(res, req){ res.end("root");}function addHandler(res, req){//获取post数据 if(req.method == 'POST'){ var body = ''; req.on('data', function (data) { body += data; }); req.on('end', function () { var POST = qs.parse(body); console.log(POST); }); } res.end("add");}function saveHandler(res, req){ res.end("save");}?