node.js 做反向代理apache作为内部服务器分流

最近要搭建一个服务器的平台，其中一部分要实现long-polling的功能，所以用到node.js服务器，但是还有许多的代码跑在apache服务器上，所以需要使用node.js作为反向代理,apache作为内部服务器。

达成效果：long-polling的代码跑在node.js服务器上，其他代码跑在apache服务器上

OS: ubuntu

操作步骤：

1. 安装mysql,apache,php

sudo apt-get install mysql-server

sudo apt-get install apache2

sudo apt-get install php5

sudo apt-get install libapache2-mod-php5

apt-cache search php5

sudo apt-get install php5-mysql php5-curl php5-gd php5-intl php-pear php5-imagick php5-imap php5-mcrypt php5-memcache php5-ming php5-ps php5-pspell php5-recode
php5-snmp php5-sqlite php5-tidy php5-xmlrpc php5-xsl

重启 Apache2:
apache2中将/etc/apache2/ports.conf中第一行（80端口行）注释掉，并添加listen 8000（自己想要的端口)

设置/etc/apache2/sites-available/mysite为

<VirtualHost *:8000>
	ServerAdmin webmaster@localhost
	DocumentRoot /home/user/web
  # firstProject
  # This should be omitted in the production environment
  #SetEnv APPLICATION_ENV development
		
	<Directory />
		Options FollowSymLinks
		AllowOverride None
		Order deny,allow
		allow from all
	</Directory>
	Alias /api /home/yren/api
	<Directory /home/yren/api>
		Options FollowSymLinks
		AllowOverride None
		Order deny,allow
		allow from all
#这个要小心，是用来设定重定向的，自己写自己的重定向规则!!!!
	<IfModule mod_rewrite.c>
		RewriteEngine on
		RewriteBase /api
		RewriteRule . index.php
	</IfModule>
	</Directory>

	ErrorLog /var/log/apache2/error-8000.log

	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel debug

	CustomLog /var/log/apache2/access-8000.log combined

	<IfModule mod_rewrite.c>
		RewriteEngine on
		RewriteLog /var/log/apache2/rewrite-8000.log
		RewriteLogLevel 9
	</IfModule>

</VirtualHost>

sudo a2ensite mysite(激活)

sudo a2enmod rewrite (使能rewrite.mod模块)

/etc/init.d/apache2 restart



2. 安装node.js

sudo apt-get install curl

sudo apt-get install libssl-dev

sudo apt-get install g++

git clone git://github.com/joyent/node.git

cd node

./configure

make

sudo make install

3. node-http-proxy(需要npm来安装)

sudo curl https://npmjs.org/install.sh | sh

npm install http-proxy

4. 编写代理代码proxy.js

var http = require('http'),
    httpProxy = require('./node_modules/http-proxy/lib/node-http-proxy'); //这个目录一定要写正确
//httpProxy.createServer(8124, 'localhost').listen(80);
var options = {
  router: {
    '10.3.3.1/123': '127.0.0.1:8124',
    '10.3.3.1': '127.0.0.1:8000'
  }
};
var proxyServer = httpProxy.createServer(options);
proxyServer.listen(80);
http.createServer(function (req, res) {  
  res.writeHead(200, {'Content-Type': 'text/plain'});  
  res.end('Hello Node.jsn');  
}).listen(8124);  
console.log('Server running at http://127.0.0.1:8124/');

sudo node proxy.js (80端口必须使用sudo权限)

5. 经过以上4步，就可以将10.3.3.1/123:80的请求转发到8124端口，其余的转发的8000端口