Flex初体验

Flex入门推荐教程：http://wenku.baidu.com/view/98ee93fbaef8941ea76e05ef.html

虽然是基于Flash Builder 2讲的，基本上跟flex没有区别，何况它是从flex的基本用法讲起的。

特点：概念清晰，详略得当。

Flex跨域问题与swf中是一样的，最佳解决方法就是代理了。php本地代理：

<?php
$ver = "1.0.0";
$copy="";
if(!isset($_GET['address']) || !$_GET['address']){
	die("
			nsT web proxy $ver
			PHP Web proxy :: nst.e-nex.com
			Address: 
Example: www.yourdomain.com/path/proxy.php?address=http://www.baidu.com or 
      www.yourdomain.com/path/proxy.php?address=blogs.adobe.com/mchotin/feed

\n
$copy
");
}else{
	$address = $_GET['address'];
	$php_self= $_SERVER['PHP_SELF'];
	$total ="";
	$offset=0;
	$info ="";
# v1.1 #
	$x=$address;
	$c=strlen($x);
	if($x{0}.$x{1}.$x{2}.$x{3}.$x{4}.$x{5}.$x{6}=="http://"){
		for($i=7; $i < $c; $i++){
			$total.=$x{$i};
		}
		$address=$total;
	}
# end of v1.1 #
	$get_add = explode("/",$address,2);
	if($_GET['address']){
		$fp = @fsockopen($get_add[0], 80);
		if(count($get_add)<2){ array_push($get_add,"");}
		$out = "GET /$get_add[1] HTTP/1.0\r\n";
		$out .= "Host: $get_add[0]\r\n";
		$out .= "\r\n";
		$out .= "Connection: Close\r\n\r\n";
		for(fwrite($fp, $out);trim(fgets($fp)););
		while (!feof($fp)) {
			$info.=fgets($fp, 128);
		}
		fclose($fp);
		$script_url=$php_self;
		$web=$info;
		preg_match_all("#\s(href|src|action|codebase|url)=([\"\'])?(.*?)([\"\'])?([\s\>])#i", $web, $matches, PREG_SET_ORDER);
		foreach ($matches as $match)
		{
			$uri = trim($match[3]);
			$fragment = ($hash_pos = strpos($uri, '#') !== false) ? '#' . substr($uri, $hash_pos) : '';
			$addr=parse_url("http://".$address."/");
			$path=pathinfo($addr['path']);
			$path=$path['dirname'];
			$path=str_replace("\\","",$path);
			if(!eregi("$address",$uri) and !eregi("http://",$uri)){$uri="http://".$addr['host']."/$path/$uri";}
			if(substr_count($uri, "http://".$addr['host']."/")>1){$uri=str_replace("http://".$addr['host']."/","",$uri); $uri="http://".$addr['host']."/$uri";}
			$url=$uri;
			$c=strlen($url);
			for($i=0; $i<$c; $i++){
				$cp=substr($url, $i, $i+1);
				if(substr($url,$i-2,2)=="//" and substr($url,$i-3,3)!="://"){
					$url=substr_replace($url, '', $i-2, 1);
				}
			}
			$uri=$url;
			$replace = ' ' . $match[1] . '=' . $match[2] . $script_url . '?address=' . $uri . $fragment . $match[4] . $match[5];
			$web = str_replace($match[0], $replace, $web);
		}
		print $web;
	} #end of go
}
?>

Flex例子：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="feedRequest.send();">
<mx:Script>
<![CDATA[
private function clear():void
{
	my_text_input_1.text="clear it!";
}


]]></mx:Script>
 <mx:HTTPService id="feedRequest" url="http://localhost/proxy.php?address=blogs.adobe.com/mchotin/feed" useProxy="False" />
 <mx:Label text="Hello World" />
 <mx:TextInput id="my_text_input_1" width="100" text="{feedRequest.lastResult.rss.channel.title}" />
 <mx:Button id="my_clear_button_1" label="clear" click="clear();" />
</mx:Application>

编译方法：

D:\http_root\code>mxmlc control.mxml
Loading configuration file C:\Program Files\flex4sdk\frameworks\flex-config.xml
D:\http_root\code\control.swf (314271 bytes)

D:\http_root\code>