FLEX编写播放器（防止下载与嗅探）

来源：互联网发布：百度音乐mac版下载编辑：程序博客网时间：2024/04/30 05:14

运行预览近一段时间从零开始接触Flex 最后做成了一个有点意思的播放器下面是整个工作的流程
1.需求防止用户保存（包括缓存）下载嗅探的播放器一个
尝试用activex控件联想到网络播放的需求认为流媒体格式更加合适这个播放器转而寻找新的解决方法
通过资料查询，发现Adobe公司的FLEX很适合开发这样的播放器特别是加上FMS3.0的防下载机制我就可以
更加轻松了于是通过对网上资源的修改做成第一版播放器
<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="playinit()" width="500" height="400">

    <mx:Script>
    <![CDATA[
       import mx.events.SliderEvent;
       import mx.events.VideoEvent;
       import mx.collections.ArrayCollection;
       import mx.rpc.events.ResultEvent;
       import flash.display.Stage;

       private var _video:ArrayCollection;
       private var isplaying:Boolean=false;
       //private var video_url:String = "C:/video.flv";
       private var playPosition:Number;
       private var soundPosition:Number;

       private function readXml(event:ResultEvent):void{
       _video = event.result.videos.video;
             }

       private function playinit():void{
        hs.enabled=false;
       }

       private function flvplay(event:Event):void{
            var query:String = ExternalInterface.call("window.location.search.substring", 1);
            if(query) {
                    var pos:int = query.indexOf("=");
                    //Alert.show(String(pos));
                    if(pos != -1) {
                        var value:String = query.substr(pos+1);
                         }
                }

      flv_video.source="rtmp://localhost/vod/media/"+value+".flv";
      //flv_video.source="c:/vedio.flv";
        hs.enabled=true;
        if(isplaying){
         flv_video.pause();
         play_btn.label="播放"
        }else {
         flv_video.play();
         play_btn.label="暂停"
        }
        isplaying = !isplaying;
        flv_video.addEventListener(VideoEvent.PLAYHEAD_UPDATE, progressHandler);
       }
       private function progressHandler(event:VideoEvent):void{
        hs.value=flv_video.playheadTime;
       }

       private function thumbPress(event:SliderEvent):void{
        flv_video.pause();
       }
       private function thumbChanges(event:SliderEvent):void{
        if(flv_video.playheadTime == -1){
      hs.value = 0;
      return;
     }
        playPosition = hs.value;
       }
       private function thumbRelease(event:SliderEvent):void{
        flv_video.playheadTime = playPosition;
        if(isplaying){
         flv_video.play();
        }else{
         flv_video.pause();
        }
       }

       private function sound_thumbChanges(event:SliderEvent):void{
        soundPosition = hs_sound.value;
       }
       private function sound_thumbRelease(event:SliderEvent):void{
        flv_video.volume = soundPosition;
       }

       private function formatTimes(value:int):String{
        var result:String = (value % 60).toString();

          if (result.length == 1){
              result = Math.floor(value / 60).toString() + ":0" + result;
          } else {
              result = Math.floor(value / 60).toString() + ":" + result;
          }
          return result;
       }

            private function display():void
            {
                if(fs.selected)
                {
                stage.fullScreenSourceRect =new Rectangle(flv_video.x,flv_video.y,flv_video.width,flv_video.height);
                 // stage.displayState="fullScreen";
                   stage.displayState =StageDisplayState.FULL_SCREEN;
                    //application.width="100%";
                    //application.height="100%"
                }
                else
                {
                    //stage.displayState="normal";
                    stage.displayState = StageDisplayState.NORMAL;
                }
            }

    ]]>
    </mx:Script>
<mx:VideoDisplay   id="flv_video" x="0" width="100%" height="332" y="0" source="{Application.application.parameters.movie}" autoPlay="false" autoRewind="true" bufferTime="0.5" maintainAspectRatio="false" />
<mx:ApplicationControlBar height="20" width="100%" bottom="53" x="0" horizontalAlign="center">
   <mx:HSlider id="hs" fillColors="#000099,, #0000ff, #ffffff, #eeeeee" showTrackHighlight="true" minimum="0" maximum="{flv_video.totalTime}" thumbPress="thumbPress(event)" thumbRelease="thumbRelease(event)" change="thumbChanges(event)" width="90%" horizontalCenter="0"/>
</mx:ApplicationControlBar>
<mx:ApplicationControlBar width="100%" height="38" horizontalAlign="center" x="0" bottom="10">
   <mx:ApplicationControlBar width="123" cornerRadius="15">
    <mx:Button id="play_btn" click="flvplay(event)" label="播放" cornerRadius="13"/>
    <mx:Button id="stop_btn" label="停止" cornerRadius="13" click="flv_video.stop();play_btn.label='播放';hs.enabled=false;" />
   </mx:ApplicationControlBar>
   <mx:ApplicationControlBar width="94" cornerRadius="15">
    <mx:Label id="playtime" text="{formatTimes(flv_video.playheadTime)} : {formatTimes(flv_video.totalTime)}" color="#ffffff" width="77"/>
   </mx:ApplicationControlBar>
   <mx:ApplicationControlBar cornerRadius="15" width="100">
    <mx:HSlider id="hs_sound" width="82" minimum="0" maximum="1" thumbRelease="sound_thumbRelease(event)" change="sound_thumbChanges(event)" value="{flv_video.volume}" />
   </mx:ApplicationControlBar>
   <mx:ApplicationControlBar color="#EC968F">
    <mx:CheckBox label="全屏" id="fs" change="display();"/>
   </mx:ApplicationControlBar>
</mx:ApplicationControlBar>
</mx:Application>

其中播放器播放源文件的路径是默认安装FMS3.0之后在

C:/Program Files/Adobe/Flash Media Server 3/applications/vod/media 之中。调用方式是flv_video.source="rtmp://localhost/vod/vedio.flv";可以通过修改配置文件改变视频存放目录

播放器的代码大多来自网上只是有几点修改

第一取得路径由于安全机制播放器只能通过服务器地址取值

第二全屏问题
<param name="allowFullScreen" value="true" />
全屏时播放器大小不变
<mx:VideoDisplay id="flv_video" x="0" width="100%" height="90%" y="0" source="{Application.application.parameters.movie}" autoPlay="false" autoRewind="true" bufferTime="0.5" maintainAspectRatio="false" />
width="100%" height="90%"十分重要这将会与
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="playinit()" width="500" height="400">密切相关

最终解决方法
stage.fullScreenSourceRect =new Rectangle(flv_video.x,flv_video.y,flv_video.width,flv_video.height);
第三播放flv视频时不留下缓存
http://etoaoo.javaeye.com/blog/341345

这个版本中的基本功能都可以实现但是最后发现一个巨大的问题

可以被嗅探 Replay Media Catcher

这个软件通过记录网络包并且以相同网络包给FMS服务器发包骗取服务器的数据然后自己一段一段组装成流媒体视频这个漏洞几乎宣布了项目的死刑

不过解决方案很快就出来了

未完......