（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 ＝。-

 1 private var ns:NetStream;
 2 private var video:Video;
 3 private var meta:Object;
 4 private var client:HttpClient;
 5 private var filesize:Number = 0;
 6 private var loadedBytes:Number = 0;
 7 private var data:ByteArray = new ByteArray();
 8 private var datadelta:Number = 1024*1024;
 9 private var file:String = "http://your_video_web_url/example.flv";
10
11 private function init():void{
12     var nsClient: Object = {};
13     nsClient.onMetaData = metaDataHandler;
14     var nc:NetConnection = new NetConnection();
15     nc.connect(null);
16     ns = new NetStream(nc);
17     ns.client = nsClient;
18     ns.addEventListener(NetStatusEvent.NET_STATUS,netStatusHandler);
19     ns.addEventListener(IOErrorEvent.IO_ERROR,nsIOErrorHandler);
20     video = new Video();
21     video.attachNetStream(ns);
22     video.smoothing = true;
23     uic.addChild(video);
24     client = new HttpClient();
25     loadData();
26     ns.play(null);
27 }
28 private function loadData():void{
29     var uri:URI = new URI(file);
30     var request:HttpRequest = new Get();
31     var maxdata:Number = loadedBytes+datadelta;
32     if (maxdata>=filesize and filesize>0){
33         request.addHeader(‘Range‘,‘bytes=‘+loadedBytes+‘-‘);
34     } else {
35         request.addHeader(‘Range‘,‘bytes=‘+loadedBytes+‘-‘+maxdata);
36     }
37
38     client.listener.onData = function(e:HttpDataEvent):void
39     {
40         var bytes:ByteArray = new ByteArray();
41         bytes = e.bytes;
42         bytes.position = 0;
43         data.writeBytes(bytes);
44     };
45
46     client.listener.onComplete = function(e:HttpResponseEvent ):void{
47         loadedBytes+=data.length;
48         filesize = Number(e.response.header.getValue(‘Content-Length‘))/1024;
49         ns.appendBytes(data);
50         data.clear();
51         inLoaded = false;
52     };
53
54     client.request(uri,request);
55 }