下面是我亲自测试通过的部分代码，主要作用是允许media play播放wma文件，禁止http读取wma文件

可以有效的防止下载，赫赫

   SetEnvIfNoCase User-Agent "RealMedia"  media_ref=1
    SetEnvIfNoCase User-Agent "NSPlayer" media_ref=1
    SetEnvIfNoCase Request_URI  ".(mp3|wma)"    is_media=1
    #### My Verson
    #BrowserMatch "RealMedia" media_ref=0
    #BrowserMatch "NSPlayer" media_ref=0

# If have been spidered by baidu or mp3searcher, you'd better rename   
# the file and do not use the deny.
    <FilesMatch ".(mp3|wma)">  
 
        Order Deny,Allow
        Deny from all
        Allow from env=media_ref

   </FilesMatch>
  
  
SetEnvIfNoCase Referer "mtv999.com" !media_ref
SetEnvIfNoCase Referer "-" !media_ref

# Agree to download at mediaplayer
    SetEnvIfNoCase User-Agent "RealMedia"  media_ref=1
    SetEnvIfNoCase User-Agent "NSPlayer" media_ref=1
    SetEnvIfNoCase Request_URI  ".(mp3|wma)"    is_media=1
   

<FilesMatch ".(png|gif|jpg|mp3|wma)">
Order Allow,Deny
Allow from env=media_ref
</FilesMatch>

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