在播放视频时,直接查看页面源文件可看到视频文件地址,MediaPlayer控件播放器将在页面上加上如下初始化语句:
MediaPlayer控件初始化可查看到源文件地址
- Sys.Application.add_init(function() {
- $create(Sys.UI.Silverlight.MediaPlayer, {"autoPlay":true,"mediaSource":"http://211.142.31.235/Nas1/VOD/CP0001/490Kbps/D/DI/DIA/DiaoZhongYuan1/DiaoZhongYuan1.wmv","scaleMode":2,"source":"UserControl/playerTheme/player.xaml","volume":1}, null, null, $get("myUserMediaPlayer_player_parent"));
- });
解决方案是先建立一个字符串加密解密服务
加密、解密工具类
1/**//// <summary>
2 /// 对字符串进行、加解密的工具类
3 /// </summary>
4 public class DESEncryptor
5 {
6 静态公共方法#region 静态公共方法
7 /**//// <summary>
8 /// 对字符串进行加密
9 /// </summary>
10 /// <param name="strSource">源字符串</param>
11 /// <returns>加密后的字符串</returns>
12 public static string ExecEncrypt(string strSource)
13 {
14 DESEncryptor desEncryptor = new DESEncryptor() ;
15 desEncryptor.InputString = strSource ;
16 desEncryptor.DesEncrypt() ;
17 return desEncryptor.OutString ;
18 }
19 /**//// <summary>
20 /// 对已经加密的字符串进行解密
21 /// </summary>
22 /// <param name="strSource">已经加密的字符串</param>
23 /// <returns>还原后的字符串</returns>
24 public static string ExecDeEncrypt(string strSource)
25 {
26 DESEncryptor desEncryptor = new DESEncryptor() ;
27 desEncryptor.InputString = strSource ;
28 desEncryptor.DesDecrypt() ;
29 return desEncryptor.OutString ;
30 }
31 #endregion
32
33 私有成员#region 私有成员
34 /**//// <summary>
35 /// 输入字符串
36 /// </summary>
37 private string inputString=null;
38 /**//// <summary>
39 /// 输出字符串
40 /// </summary>
41 private string outString=null;
42 /**//// <summary>
43 /// 输入文件路径
44 /// </summary>
45 private string inputFilePath=null;
46 /**//// <summary>
47 /// 输出文件路径
48 /// </summary>
49 private string outFilePath=null;
50 /**//// <summary>
51 /// 加密密钥
52 /// </summary>
53 private string encryptKey="fanmenglife";
54 /**//// <summary>
55 /// 解密密钥
56 /// </summary>
57 private string decryptKey = "fanmenglife";
58 /**//// <summary>
59 /// 提示信息
60 /// </summary>
61 private string noteMessage=null;
62 #endregion
63
64 公共属性#region 公共属性
65 /**//// <summary>
66 /// 输入字符串
67 /// </summary>
68 public string InputString
69 {
70 get{return inputString;}
71 set{inputString=value;}
72 }
73 /**//// <summary>
74 /// 输出字符串
75 /// </summary>
76 public string OutString
77 {
78 get{return outString;}
79 set{outString=value;}
80 }
81 /**//// <summary>
82 /// 输入文件路径
83 /// </summary>
84 public string InputFilePath
85 {
86 get{return inputFilePath;}
87 set{inputFilePath=value;}
88 }
89 /**//// <summary>
90 /// 输出文件路径
91 /// </summary>
92 public string OutFilePath
93 {
94 get{return outFilePath;}
95 set{outFilePath=value;}
96 }
97 /**//// <summary>
98 /// 加密密钥
99 /// </summary>
100 public string EncryptKey
101 {
102 get{return encryptKey;}
103 set{encryptKey=value;}
104 }
105 /**//// <summary>
106 /// 解密密钥
107 /// </summary>
108 public string DecryptKey
109 {
110 get{return decryptKey;}
111 set{decryptKey=value;}
112 }
113 /**//// <summary>
114 /// 错误信息
115 /// </summary>
116 public string NoteMessage
117 {
118 get{return noteMessage;}
119 set{noteMessage=value;}
120 }
121 #endregion
122
123 构造函数#region 构造函数
124 /**//// <summary>
125 /// 构造函数
126 /// </summary>
127 public DESEncryptor()
128 {
129 //
130 // TODO: 在此处添加构造函数逻辑
131 //
132 }
133 #endregion
134
135 DES加密字符串#region DES加密字符串
136 /**//// <summary>
137 /// 加密字符串
138 /// 注意:密钥必须为8位
139 /// </summary>
140 public void DesEncrypt()
141 {
142 byte[] byKey=null;
143 byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};
144 try
145 {
146 byKey = System.Text.Encoding.UTF8.GetBytes(this.encryptKey.Substring(0,8));
147 DESCryptoServiceProvider des = new DESCryptoServiceProvider();
148 byte[] inputByteArray = Encoding.UTF8.GetBytes(this.inputString);
149 MemoryStream ms = new MemoryStream();
150 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write) ;
151 cs.Write(inputByteArray, 0, inputByteArray.Length);
152 cs.FlushFinalBlock();
153 this.outString=Convert.ToBase64String(ms.ToArray());
154 }
155 catch(System.Exception error)
156 {
157 this.noteMessage=error.Message;
158 }
159 }
160 #endregion
161
162 DES解密字符串#region DES解密字符串
163 /**//// <summary>
164 /// 解密字符串
165 /// </summary>
166 public void DesDecrypt()
167 {
168 byte[] byKey = null;
169 byte[] IV= {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};
170 byte[] inputByteArray = new Byte[this.inputString.Length];
171 try
172 {
173 byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0,8));
174 DESCryptoServiceProvider des = new DESCryptoServiceProvider();
175 inputByteArray = Convert.FromBase64String(this.inputString);
176 MemoryStream ms = new MemoryStream();
177 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
178 cs.Write(inputByteArray, 0, inputByteArray.Length);
179 cs.FlushFinalBlock();
180 System.Text.Encoding encoding = new System.Text.UTF8Encoding();
181 this.outString=encoding.GetString(ms.ToArray());
182 }
183 catch(System.Exception error)
184 {
185 this.noteMessage=error.Message;
186 }
187 }
188 #endregion
189}
加密、解密WebService,调用工具内加密、解密方法:
1/**//// <summary>
2 /// Summary description for Service1
3 /// </summary>
4 [WebService(Namespace = "http://tempuri.org/")]
5 [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
6 [System.ComponentModel.ToolboxItem(false)]
7 // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
8 // [System.Web.Script.Services.ScriptService]
9 public class Service1 : System.Web.Services.WebService
10 {
11 /**//// <summary>
12 /// 加密
13 /// </summary>
14 /// <param name="url">地址</param>
15 /// <returns></returns>
16 [WebMethod]
17 public string Encrypt(string url)
18 {
19 return DESEncryptor.ExecEncrypt(url);
20 }
21
22 /**//// <summary>
23 /// 解密
24 /// </summary>
25 /// <param name="url">地址</param>
26 /// <returns></returns>
27 [WebMethod]
28 public string DeEncrypt(string url)
29 {
30 return DESEncryptor.ExecDeEncrypt(url);
31 }
32 }
在MediaPlayer控件播放页面加载时,先调用WebService内加密方法对播放地址进行加密,然后注册JavaScript脚本调用视频文件播放方法:
播放页面加载
- protected void Page_Load(object sender, EventArgs e)
- {
- if (!IsPostBack)
- {
- //对播放地址进行加密
- string encryptUrl = local.Encrypt(playUrl);
- //注册脚本,调用javascript播放方法
- Page.ClientScript.RegisterStartupScript(this.GetType(), "", " setTimeout(\"onPlay('" + encryptUrl + "')\",1000)", true);
- }
- }
JavaScript调用WebService通过微软提供的WebService.htc实现,ASP.NET中使用WebService.htc需要在HTML代码中添加如下代码:
- <div id="serviceDiv" style="behavior: url(WebService.htc)"></div>
注意:该div必需在forms之外
Javascript代码:
1 function getUrl(str) {
2 //***个参数是webservice的url,后面是名称
3 serviceDiv.useService("http://localhost:88/Service1.asmx?WSDL", "news");
4 //设置一个回调函数,service返回结果的时候回调;***个参数是回调函数的名称,后面的是webservice的参数
5 intCallID = serviceDiv.news.callService(url_result, "DeEncrypt", str); //这里有两个参数..
6 }
7
8 function url_result(result)//回调函数
9 {
10 var media_player = $find('myUserMediaPlayer_player');
11 media_player.set_mediaSource(result.value);
12 media_player.set_autoPlay(true);
13 }
14
15 function onPlay(str) {
16 getUrl(str);
17 }
有几点需说明:
1. 为什么在Page_Load事件里注册脚本不直接调用Javascript内播放方法,因为页面需完全加载后,WebService.htc才会被初始化,所以我用setTimeout方法延迟一段时间再调用播放方法。
2. 大家在使用WebService回调函数时记得判断返回结果是否成功。
通过以上方法,在页面上查看源文件便无法查看到播放文件地址了,MediaPlayer初始化语句更新为如下:
更改后MediaPlayer控件初始化
- Sys.Application.add_init(function() {
- $create(Sys.UI.Silverlight.MediaPlayer, {"autoPlay":true,"scaleMode":1,"source":"../UserControl/playerTheme/VIPPlayer.xaml","volume":1}, null, null, $get("ump_player_parent"));
- });
不过这只是争对一般用户,如果大家有更好的方法可以拿出来一起共享,希望我的文章对大家有帮助。
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