问题： (node.js)Nodejs 上传大文件（视频），采用
描述:1.需求： 上传大文件【视频】，Nodejs处理；2.前端采用resumable对视频进行·分片·上传，后端采用formidable采用Buffer进行处理遇到的问题【以一个文本为例子上传】：1. 后端写入成功后，无法打开文件【自动添加POST中相关的值】
X.代码部分1.app.jsapp.post('/upload', function(req, res){
var form = new formidable.IncomingForm();
form.keepExtensions =
//保存路径
form.uploadDir = './';
form.parse(req, function(err, fields, files) {
//console.log(util.inspect({fields: fields, files: files}));
var dd=[],ll=0;
form.handlePart=function(part) {
var dd=[],ll=0;
//Buffer加入数组
part.on('data', function(data) {
if (data.length == 0) {
dd.push(data);
part.on('end', function() {
//获取文件名
var p = './' + req.query.resumableF
fs.open(p, 'a', function (err, fd) {
if (err) {
var writeBuffer = dd,
offset = 0,
len = writeBuffer.length,
filePostion =
//写人Buffer
fs.write(fd, Buffer.concat(dd, ll), 0, ll, filePostion, function(){
});2.Charles抓包数据POST /upload?resumableChunkNumber=1&resumableChunkSize=1048576&resumableCurrentChunkSize=393&resumableTotalSize=393&resumableType=text%2Frtf&resumableIdentifier=393-rtf&resumableFilename=%E6%96%87%E6%9C%AC.rtf&resumableRelativePath=%E6%96%87%E6%9C%AC.rtf&resumableTotalChunks=1 HTTP/1.1
Host: 127.0.0.1:4000
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="file"; filename="文本.rtf"
Content-Type: application/octet-stream
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableChunkNumber"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableChunkSize"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableCurrentChunkSize"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableTotalSize"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableType"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableIdentifier"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableFilename"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableRelativePath"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="resumableTotalChunks"
------WebKitFormBoundaryeLW6trgJbBaZlvgP
Content-Disposition: form- name="file"; filename="文本.rtf"
Content-Type: application/octet-stream
{\rtf1\ansi\ansicpg936\cocoartf1504
{\fonttbl\f0\fnil\fcharset134 PingFangSC-R}
{\\red255\green255\blue255;}
{\*\\csgray\c100000;}
\paperw11900\paperh16840\margl1440\margr1440\vieww10800\viewh8400\viewkind0
\pard\tx566\tx1133\tx1700\tx2267\tx2834\tx3401\tx3968\tx4535\tx5102\tx5669\tx6236\tx6803\pardirnatural\partightenfactor0
\f0\fs24 \cf0 \'c4\'e3\'ba\'c3}
------WebKitFormBoundaryeLW6trgJbBaZlvgP--
3.服务端获取的数据写人文件的内容
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基于node.js+Express.js+Jade+MongoDB开发Web即时聊天系统
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In this opening lesson, we’ll dive in and take a look at what Node is, how it works, and how we can make use of running JavaScript on the server. I will go through an example of a traditional server-side language and compare it to using JavaScript.
In this lesson, we’ll install Node and briefly go over the installation process on both Windows and Mac. Next, we’ll take an in-depth look at downloading, building and installing node for Linux. Additionally, we will verify the installation to confirm that everything is working as expected.
In this lesson, we are going to write our first piece of server-side JavaScript, which will access the file system. This includes reading and writing files and using different techniques. Then, we are going to “watch” a file, which listens for when a file changes, and responds accordingly to that event.
Now that we’ve had an introduction to the file system, we’re going to look at creating a web server.
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In lesson nine, we’re going to publish our GitHub module to the NPM directory. This way, anyone can install and make use of it. We will look at creating the module and a “package.json” file. We’ll also cover the process of publishing updates.
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In this lesson we are going to be looking at the Twitter Streaming API. This API allows us to receive tweets in real-time for tweets that mention a specific word. We are going to collect these tweets in real-time, parse them and then store them in MongoDB using some of the code we created in the last lesson.
It’s time to send some real-time data to the browser. But we know that some real-time technologies aren’t available in some browsers, such as WebSockets and AJAX. In this lesson, we’re going to be using a module, called So...
In this lesson, we are going to deploy the code we wrote in the previous lesson to a free Node hosting service, called Nodester. We are going to sign up with Nodester, use a handful of Git commands to push the code to Nodester, and view our free hosted real-time web app.
As we now know, Node (like the browser) runs in a single thread. This means that, if we are running some code that is very processor intensive, then it can delay and slow down other executing code. Sometimes, it can be necessary to spawn additional processes to do some intensive work for us. For this lesson, we are going to spawn processes to collect twitter data for some different topics.
In this final lesson, I am going to leave you with some tips for writing better code for Node, and how to help with troubleshooting and debugging.
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