（转载）AS3 HTTPCLIENT读取视频流信息

最近的工作中频繁用到HTTPCLIENT这个类

先放上github的项目地址 https://github.com/gabriel/as3httpclient

原理就是利用socket模拟一个http链接来突破flash player的各种限制

由于是socket连接，所以跨域问题大家还是要好好注意下的

比如原先urlrequest中不能自定义的referer之类的

还有一个妙处就是原先的netstream是不能读取到流的数据，

有时候在流里会藏一些数据，这时候就用到这个类来解决了

这源码是搜索的时候翻到的国外技术，因为原链接已经流失，

俄罗斯战斗民族我又惹不起。。我只好在这里标明我是转载了 ＝。-

private var ns:NetStream; 
private var video:Video; 
private var meta:Object; 
private var client:HttpClient; 
private var filesize:Number = 0; 
private var loadedBytes:Number = 0; 
private var data:ByteArray = new ByteArray(); 
private var datadelta:Number = 1024*1024; 
private var file:String = "http://your_video_web_url/example.flv";

private function init():void{  
    var nsClient: Object = {};  
    nsClient.onMetaData = metaDataHandler; 
    var nc:NetConnection = new NetConnection(); 
    nc.connect(null); 
    ns = new NetStream(nc); 
    ns.client = nsClient; 
    ns.addEventListener(NetStatusEvent.NET_STATUS,netStatusHandler); 
    ns.addEventListener(IOErrorEvent.IO_ERROR,nsIOErrorHandler); 
    video = new Video(); 
    video.attachNetStream(ns); 
    video.smoothing = true; 
    uic.addChild(video); 
    client = new HttpClient(); 
    loadData(); 
    ns.play(null); 
} 
private function loadData():void{ 
    var uri:URI = new URI(file); 
    var request:HttpRequest = new Get(); 
    var maxdata:Number = loadedBytes+datadelta; 
    if (maxdata>=filesize and filesize>0){ 
        request.addHeader('Range','bytes='+loadedBytes+'-'); 
    } else { 
        request.addHeader('Range','bytes='+loadedBytes+'-'+maxdata); 
    }

    client.listener.onData = function(e:HttpDataEvent):void 
    { 
        var bytes:ByteArray = new ByteArray(); 
        bytes = e.bytes; 
        bytes.position = 0; 
        data.writeBytes(bytes); 
    }; 

    client.listener.onComplete = function(e:HttpResponseEvent ):void{ 
        loadedBytes+=data.length; 
        filesize = Number(e.response.header.getValue('Content-Length'))/1024; 
        ns.appendBytes(data); 
        data.clear(); 
        inLoaded = false; 
    }; 

    client.request(uri,request); 
}