域名查询源码

1. usingSystem;
2. usingSystem.Data;
3. usingSystem.Configuration;
4. usingSystem.Web;
5. usingSystem.Web.Security;
6. usingSystem.Web.UI;
7. usingSystem.Web.UI.WebControls;
8. usingSystem.Web.UI.WebControls.WebParts;
9. usingSystem.Web.UI.HtmlControls;
10. usingSystem.Net;
11. usingSystem.Net.Sockets;
12. usingSystem.Text;
13. usingSystem.Collections;
14. usingSystem.Text.RegularExpressions;
16. ///<summary>
17. ///SelectYuMing的摘要说明
18. ///</summary>
19. publicclassSelectYuMing
20. {
21. publicSelectYuMing()
22. {
23. //
24. //TODO:在此处添加构造函数逻辑
25. //
27. }
28. /**/
29. ///<summary>
30. ///域名注册查询
31. ///</summary>
32. ///<paramname="domain">输入域名，不包含www</param>
33. ///<returns></returns>
34. publicstaticstringWhois(stringdomain)
35. {
36. if(domain==null)
37. thrownewArgumentNullException();//如果输入为空就抛出一个空异常（停止程序的执行）
38. intccStart=domain.LastIndexOf(".");//
39. if(ccStart<0||ccStart==domain.Length)
40. thrownewArgumentException();
41. stringret="";
42. Sockets=null;
43. try
44. {
45. stringcc=domain.Substring(ccStart+1);
46. s=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
47. s.Connect(newIPEndPoint(Dns.Resolve(cc+".whois-servers.net").AddressList[0],43));
48. s.Send(Encoding.ASCII.GetBytes(domain+"/r/n"));
49. byte[]buffer=newbyte[1024];
50. intrecv=s.Receive(buffer);
51. while(recv>0)
52. {
53. ret+=Encoding.ASCII.GetString(buffer,0,recv);
54. recv=s.Receive(buffer);
55. }
56. s.Shutdown(SocketShutdown.Both);
57. }
58. catch
59. {
60. thrownewSocketException();
61. }
62. finally
63. {
64. if(s!=null)
65. s.Close();
66. }
67. returnret;
68. }
69. ///<summary>
70. ///查询域名是否存在
71. ///</summary>
72. ///<paramname="str">所有的后缀的集合（com|cn|com.cn|hk|.net|mobi|asia|）</param>
73. ///<paramname="strYuMing"></param>
74. ///<returns></returns>
75. publicArrayListSelectYu(ArrayListstr,stringstrYuMing)
76. {
77. ArrayListarr=newArrayList();
78. foreach(stringstrYuinstr)
79. {
80. try
81. {
82. stringstrManage=Whois(strYuMing+strYu);
83. Booleanboole=SelectURL(strManage,strYu);
84. if(boole)
85. {
86. arr.Add("<span>此域名可以进行注册</span>");
87. }
88. else
89. {
90. arr.Add("<spanstyle='color:red'>此域名已经注册</span>");
91. }
92. }catch(Exception){
93. arr.Add("<spanstyle='color:red'>网络访问失败</span>");
94. }
95. }
96. returnarr;
97. }
98. ///<summary>
99. ///得到服务器返回的信息进行比较
100. ///</summary>
101. ///<paramname="strManage">服务器返回的信息</param>
102. ///<paramname="houZui">根据后缀进行比较</param>
103. ///<returns>域名是否可用</returns>
104. protectedBooleanSelectURL(stringstrManage,stringhouZui)
105. {
106. Booleanfalge=false;
108. StringPattern="";
109. RegexOptionsregex=newRegexOptions();
111. switch(houZui)
112. {
113. case".cn"://cn返回的信息
114. if(strManage=="nomatchingrecord")
115. {
116. falge=true;
117. };
118. break;
119. case".com"://com返回的信息Net返回的信息cc返回的信息
120. Pattern="Nomatch";
121. MatchCollectionMatches1=Regex.Matches(strManage,Pattern,regex);
122. foreach(MatchNextMatchinMatches1)
123. {
124. falge=true;
125. }
126. break;
128. case".net":
129. Pattern="Nomatch";
130. MatchCollectionMatchess2=Regex.Matches(strManage,Pattern,regex);
131. foreach(MatchNextMatchinMatchess2)
132. {
133. falge=true;
134. }
135. break;
136. case".tv":
137. Pattern="Nomatch";
138. MatchCollectionMatchess6=Regex.Matches(strManage,Pattern,regex);
139. foreach(MatchNextMatchinMatchess6)
140. {
141. falge=true;
142. }
143. break;
144. case".name":
145. Pattern="Nomatch";
146. MatchCollectionMatchess7=Regex.Matches(strManage,Pattern,regex);
147. foreach(MatchNextMatchinMatchess7)
148. {
149. falge=true;
150. }
151. break;
152. case".cc":
153. Pattern="Nomatch";
154. MatchCollectionMatchess3=Regex.Matches(strManage,Pattern,regex);
155. foreach(MatchNextMatchinMatchess3)
156. {
157. falge=true;
158. }
159. break;
160. case".mobi"://mobi返回的信息org返回的信息asia返回的信息
161. if(strManage=="NOTFOUND/n")
162. {
163. falge=true;
164. };
165. break;
166. case".org":
167. if(strManage=="NOTFOUND/n")
168. {
169. falge=true;
171. };
172. break;
173. case".info":
174. if(strManage=="NOTFOUND/n")
175. {
176. falge=true;
178. };
179. break;
180. case".asia":
181. if(strManage=="NOTFOUND/n")
182. {
183. falge=true;
184. };
185. break;
186. case".biz":
187. Pattern="Notfound";//BIZ返回的信息
188. MatchCollectionMatchess4=Regex.Matches(strManage,Pattern,regex);
189. foreach(MatchNextMatchinMatchess4)
190. {
191. falge=true;
192. }
193. break;
195. case".hk":
196. Pattern="DomainNotFound";//hk返回的信息
197. MatchCollectionMatchess5=Regex.Matches(strManage,Pattern,regex);
198. foreach(MatchNextMatchinMatchess5)
199. {
200. falge=true;
201. }
202. break;
203. case".com.cn":
204. if(strManage=="nomatchingrecord")
205. {
206. falge=true;
207. }
208. break;
209. case".net.cn":
210. if(strManage=="nomatchingrecord")
211. {
212. falge=true;
213. }
214. break;
215. }
217. returnfalge;
218. }
219. }