mcs/class/System.Net.Http/System.Net.Http.Headers/Parser.cs

   1 //
   2 // Parser.cs
   3 //
   4 // Authors:
   5 //      Marek Safar  <marek.safar@gmail.com>
   6 //
   7 // Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Net.Mail;
  30 using System.Globalization;
  31
  32 namespace System.Net.Http.Headers
  33 {
  34         static class Parser
  35         {
  36                 public static class Token
  37                 {
  38                         public static bool TryParse (string input, out string result)
  39                         {
  40                                 if (input != null && Lexer.IsValidToken (input)) {
  41                                         result = input;
  42                                         return true;
  43                                 }
  44
  45                                 result = null;
  46                                 return false;
  47                         }
  48
  49                         public static void Check (string s)
  50                         {
  51                                 if (s == null)
  52                                         throw new ArgumentNullException ();
  53
  54                                 if (!Lexer.IsValidToken (s)) {
  55                                         if (s.Length == 0)
  56                                                 throw new ArgumentException ();
  57
  58                                         throw new FormatException (s);
  59                                 }
  60                         }
  61
  62                         public static void CheckQuotedString (string s)
  63                         {
  64                                 if (s == null)
  65                                         throw new ArgumentNullException ();
  66
  67                                 var lexer = new Lexer (s);
  68                                 if (lexer.Scan () == Headers.Token.Type.QuotedString && lexer.Scan () == Headers.Token.Type.End)
  69                                         return;
  70
  71                                 if (s.Length == 0)
  72                                         throw new ArgumentException ();
  73
  74                                 throw new FormatException (s);
  75                         }
  76
  77                         public static void CheckComment (string s)
  78                         {
  79                                 if (s == null)
  80                                         throw new ArgumentNullException ();
  81
  82                                 var lexer = new Lexer (s);
  83
  84                                 string temp;
  85                                 if (!lexer.ScanCommentOptional (out temp)) {
  86                                         if (s.Length == 0)
  87                                                 throw new ArgumentException ();
  88
  89                                         throw new FormatException (s);
  90                                 }
  91                         }
  92                 }
  93
  94                 public static class DateTime
  95                 {
  96                         public static bool TryParse (string input, out DateTimeOffset result)
  97                         {
  98                                 return Lexer.TryGetDateValue (input, out result);
  99                         }
 100                 }
 101
 102                 public static class EmailAddress
 103                 {
 104                         public static bool TryParse (string input, out string result)
 105                         {
 106                                 try {
 107                                         new MailAddress (input);
 108                                         result = input;
 109                                         return true;
 110                                 } catch {
 111                                         result = null;
 112                                         return false;
 113                                 }
 114                         }
 115                 }
 116
 117                 public static class Int
 118                 {
 119                         public static bool TryParse (string input, out int result)
 120                         {
 121                                 return int.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 122                         }
 123                 }
 124
 125                 public static class TimeSpanSeconds
 126                 {
 127                         public static bool TryParse (string input, out TimeSpan result)
 128                         {
 129                                 int value;
 130                                 if (Int.TryParse (input, out value)) {
 131                                         result = TimeSpan.FromSeconds (value);
 132                                         return true;
 133                                 }
 134
 135                                 result = TimeSpan.Zero;
 136                                 return false;
 137                         }
 138                 }
 139
 140                 public static class Uri
 141                 {
 142                         public static bool TryParse (string input, out System.Uri result)
 143                         {
 144                                 return System.Uri.TryCreate ("http://" + input + "/", UriKind.Absolute, out result);
 145                         }
 146
 147                         public static void Check (string s)
 148                         {
 149                                 if (s == null)
 150                                         throw new ArgumentNullException ();
 151
 152                                 System.Uri uri;
 153                                 if (!TryParse (s, out uri)) {
 154                                         if (s.Length == 0)
 155                                                 throw new ArgumentException ();
 156
 157                                         throw new FormatException (s);
 158                                 }
 159                         }
 160                 }
 161         }
 162 }