实例详解Nodejs 保存 payload 发送过来的文件

1：接受文件

http://stackoverflow.com/questions/24610996/how-to-get-uploaded-file-in-node-js-express-app-using-angular-file-upload

可以用下列的第三方库
•busboy and connect-busboy
•multiparty and connect-multiparty
•formidable
•multer

2：保存文件

ps：nodejs get/request
灌水评论示例：

var http = require（"http"）;var querystring = require（"querystring"）;var postData = querystring.stringify（{content: "不错不错",cid: 348}）;var options = {hostname: "www.imooc.com",port: 80,path: "/course/docomment",method: "POST",headers:{"Accept":"application/json, text/javascript, */*; q=0.01","Accept-Encoding":"gzip, deflate","Accept-Language":"zh-CN,zh;q=0.8","Connection":"keep-alive","Content-Length":postData.length,"Content-Type":"application/x-www-form-urlencoded; charset=UTF-8","Cookie":"imooc_uuid=791e8f39-5d06-433a-831f-909fa85acdd3; imooc_isnew_ct=1452475309; IMCDNS=0; loginstate=1; apsid=A0NWQzM2RkMzM2NDk0NWFkOTc5NmQzYzBkNTUyMGMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMjc0Njc4MAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADBlY2Y5ZjJiZGNjZTFlZTJmMjkwZTE2Y2M4YWE4MWE49QOTVvUDk1Y%3DZD; PHPSESSID=1uunfnq1rdhup7tudcre36l8h1; jwplayer.qualityLabel=é«˜æ¸…; cvde=569454113f947-13; Hm_lvt_f0cfcccd7b1393990c78efdeebff3968=1452475311,1452561427; Hm_lpvt_f0cfcccd7b1393990c78efdeebff3968=1452579983; imooc_isnew=2","Host":"www.imooc.com","Origin":"http://www.imooc.com","Referer":"http://www.imooc.com/comment/348","User-Agent":"Mozilla/5.0 （Windows NT 6.1; WOW64） AppleWebKit/537.36 （KHTML, like Gecko） Chrome/45.0.2454.99 Safari/537.36","X-Requested-With":"XMLHttpRequest"}}var req = http.request（options, function（res） {console.log（"Status: " + res.statusCode）;console.log（"headers: " + JSON.stringify（res.headers））;res.on（"data", function（chunk） {console.log（Buffer.isBuffer（chunk））;console.log（typeof chunk）;}）;res.on（"end", function（） {console.log（"评论完毕"）;}）;}）;req.on（"error", function（e） {console.log（"Error: " + e.message）;}）;req.write（postData）;req.end（）;