A Web application example under Mac Node.js+express

Mac users can have three ways

one: Brew Way

Brew Install node

II: Manual Compilation
br> 1. Install Xcode

2. Install git

3. Run the following command line to compile Node.js

git clone git://github.com/joyent/node.git
CD NODE
/configure
Make
sudo make install

Three: Download pkg package install from official website

http://nodejs.org/# Download

Strongly recommend this type of installation Ah, because the above two I have tried the taste of failure
after installation with NODE-V can see the version number on the line
can also run the following demo

The code is as follows	Copy Code
var http = require (' http '); Http.createserver (function (req, res) { Res.writehead ({' Content-type ': ' Text/plain '}); Res.end (' Hello node.jsn '); }). Listen (8124, "127.0.0.1"); Console.log (' Server running at http://127.0.0.1:8124/');

Use node to run this piece of code

The code is as follows	Copy Code
Node Hello_node.js Server running at http://127.0.0.1:8124/

After installing Nodejs you need to install a NPM, similar to the GIM package in Ruby
Installation method is

Curl Http://npmjs.org/install.sh | sudo sh

PS: No sudo may not have permissions
Run NPM-V can see the version number on the line
Then you need to download the NODEJS MVC framework: Express
Install as a global installation:
NPM Install-g Express
And then use the EXPRESS-V to have the version number.
and use

Express Demo

You can create a demo of MVC,

CD Demo
NPM install-d
Node App.js

In this way, you can visit the http://localhost:3000 to see the successful page

Express

Welcome to Express

Maybe you're going to run into this damn anomaly.

Voidmatomacbook-air:hello2 voidman$ Node App.js

node.js:201
Throw e; Process.nexttick error, or ' Error ' event on tick
^
Typeerror:cannot Read property ' port ' of NULL
At Object. (/users/voidman/documents/workspace/hello2/app.js:35:76)
At Module._compile (module.js:441:26)
At Object.. JS (module.js:459:10)
At Module.load (module.js:348:31)
At Function._load (module.js:308:12)
At array.0 (module.js:479:10)
At Eventemitter._tickcallback (node.js:192:40)

There are two solutions, one of which is executing in the project root directory

NPM Install Express

No-g, so it can be installed under the Node_modules folder of the project
There is another way

NPM Install Express-g

If so, you will need to execute at the bottom of the project root directory

NPM install-d

to Insatall dependence.
There is also an exception is prompted Jade did not find, the solution is only necessary to install the Jade on the line

NPM install-g Jade