Node.Js上传图片

/**
 * Created by cherish on 2016/5/24.
 * 图片上传
 * node-formidable
 * 它是一个对文件上传提供帮助的组件
 */

var http=require('http');
var formidable=require('formidable');
var sys=require('sys');
/**
 * 页面
 * @param req
 * @param res
 */
function enterRequest(req,res){
    res.writeHead(200,{"Content-Type":"Text/html"});
    res.end(
        '

' +
        '
' +
        '
' +
        '' +
        '

'
    );
}

/**
 * 处理上传逻辑
 * @param req
 * @param res
 */
function  uploadRequest(req,res){
    var form=new formidable.IncomingForm;
    form.parse(req,function(err,fields,files){
        res.writeHead(200,{"Content-Type":"Text/plain"});
        res.write('reviced upload file');
        res.end(sys.inspect({
            field:fields,
            files:files
        }));
    })
}

/**
 * 回调函数
 * @param req
 * @param res
 */
function onRequest(req,res){
    if(req.url=='/upload'&&req.method.toLowerCase()=='post'){
        console.log('upload is request');
        uploadRequest(req,res);
        return;
    }
    enterRequest(req,res);
}
http.createServer(onRequest).listen(3000);
console.log('Server is listening right now ....');