csharp/client/result/URIParsedResult.cs

   1 /*\r
   2 * Copyright 2007 ZXing authors\r
   3 *\r
   4 * Licensed under the Apache License, Version 2.0 (the "License");\r
   5 * you may not use this file except in compliance with the License.\r
   6 * You may obtain a copy of the License at\r
   7 *\r
   8 *      http://www.apache.org/licenses/LICENSE-2.0\r
   9 *\r
  10 * Unless required by applicable law or agreed to in writing, software\r
  11 * distributed under the License is distributed on an "AS IS" BASIS,\r
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 * See the License for the specific language governing permissions and\r
  14 * limitations under the License.\r
  15 */\r
  16 using System;\r
  17 namespace com.google.zxing.client.result\r
  18 {\r
  19         \r
  20         /// <author>  Sean Owen\r
  21         /// </author>\r
  22         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  23         /// </author>\r
  24         public sealed class URIParsedResult:ParsedResult\r
  25         {\r
  26                 public System.String URI\r
  27                 {\r
  28                         get\r
  29                         {\r
  30                                 return uri;\r
  31                         }\r
  32                         \r
  33                 }\r
  34                 public System.String Title\r
  35                 {\r
  36                         get\r
  37                         {\r
  38                                 return title;\r
  39                         }\r
  40                         \r
  41                 }\r
  42                 /// <returns> true if the URI contains suspicious patterns that may suggest it intends to\r
  43                 /// mislead the user about its true nature. At the moment this looks for the presence\r
  44                 /// of user/password syntax in the host/authority portion of a URI which may be used\r
  45                 /// in attempts to make the URI's host appear to be other than it is. Example:\r
  46                 /// http://yourbank.com@phisher.com  This URI connects to phisher.com but may appear\r
  47                 /// to connect to yourbank.com at first glance.\r
  48                 /// </returns>\r
  49                 public bool PossiblyMaliciousURI\r
  50                 {\r
  51                         get\r
  52                         {\r
  53                                 return containsUser();\r
  54                         }\r
  55                         \r
  56                 }\r
  57                 override public System.String DisplayResult\r
  58                 {\r
  59                         get\r
  60                         {\r
  61                                 System.Text.StringBuilder result = new System.Text.StringBuilder(30);\r
  62                                 maybeAppend(title, result);\r
  63                                 maybeAppend(uri, result);\r
  64                                 return result.ToString();\r
  65                         }\r
  66                         \r
  67                 }\r
  68                 \r
  69                 //UPGRADE_NOTE: Final was removed from the declaration of 'uri '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  70                 private System.String uri;\r
  71                 //UPGRADE_NOTE: Final was removed from the declaration of 'title '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  72                 private System.String title;\r
  73                 \r
  74                 public URIParsedResult(System.String uri, System.String title):base(ParsedResultType.URI)\r
  75                 {\r
  76                         this.uri = massageURI(uri);\r
  77                         this.title = title;\r
  78                 }\r
  79                 \r
  80                 private bool containsUser()\r
  81                 {\r
  82                         // This method is likely not 100% RFC compliant yet\r
  83                         int hostStart = uri.IndexOf(':'); // we should always have scheme at this point\r
  84                         hostStart++;\r
  85                         // Skip slashes preceding host\r
  86                         int uriLength = uri.Length;\r
  87                         while (hostStart < uriLength && uri[hostStart] == '/')\r
  88                         {\r
  89                                 hostStart++;\r
  90                         }\r
  91                         //UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"\r
  92                         int hostEnd = uri.IndexOf('/', hostStart);\r
  93                         if (hostEnd < 0)\r
  94                         {\r
  95                                 hostEnd = uriLength;\r
  96                         }\r
  97                         //UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"\r
  98                         int at = uri.IndexOf('@', hostStart);\r
  99                         return at >= hostStart && at < hostEnd;\r
 100                 }\r
 101                 \r
 102                 /// <summary> Transforms a string that represents a URI into something more proper, by adding or canonicalizing\r
 103                 /// the protocol.\r
 104                 /// </summary>\r
 105                 private static System.String massageURI(System.String uri)\r
 106                 {\r
 107                         int protocolEnd = uri.IndexOf(':');\r
 108                         if (protocolEnd < 0)\r
 109                         {\r
 110                                 // No protocol, assume http\r
 111                                 uri = "http://" + uri;\r
 112                         }\r
 113                         else if (isColonFollowedByPortNumber(uri, protocolEnd))\r
 114                         {\r
 115                                 // Found a colon, but it looks like it is after the host, so the protocol is still missing\r
 116                                 uri = "http://" + uri;\r
 117                         }\r
 118                         else\r
 119                         {\r
 120                                 // Lowercase protocol to avoid problems\r
 121                                 uri = uri.Substring(0, (protocolEnd) - (0)).ToLower() + uri.Substring(protocolEnd);\r
 122                         }\r
 123                         return uri;\r
 124                 }\r
 125                 \r
 126                 private static bool isColonFollowedByPortNumber(System.String uri, int protocolEnd)\r
 127                 {\r
 128                         //UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"\r
 129                         int nextSlash = uri.IndexOf('/', protocolEnd + 1);\r
 130                         if (nextSlash < 0)\r
 131                         {\r
 132                                 nextSlash = uri.Length;\r
 133                         }\r
 134                         if (nextSlash <= protocolEnd + 1)\r
 135                         {\r
 136                                 return false;\r
 137                         }\r
 138                         for (int x = protocolEnd + 1; x < nextSlash; x++)\r
 139                         {\r
 140                                 if (uri[x] < '0' || uri[x] > '9')\r
 141                                 {\r
 142                                         return false;\r
 143                                 }\r
 144                         }\r
 145                         return true;\r
 146                 }\r
 147         }\r
 148 }