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 bool TryCheck (string s)
  63                         {
  64                                 if (s == null)
  65                                         return false;
  66
  67                                 return Lexer.IsValidToken (s);
  68                         }
  69
  70                         public static void CheckQuotedString (string s)
  71                         {
  72                                 if (s == null)
  73                                         throw new ArgumentNullException ();
  74
  75                                 var lexer = new Lexer (s);
  76                                 if (lexer.Scan () == Headers.Token.Type.QuotedString && lexer.Scan () == Headers.Token.Type.End)
  77                                         return;
  78
  79                                 if (s.Length == 0)
  80                                         throw new ArgumentException ();
  81
  82                                 throw new FormatException (s);
  83                         }
  84
  85                         public static void CheckComment (string s)
  86                         {
  87                                 if (s == null)
  88                                         throw new ArgumentNullException ();
  89
  90                                 var lexer = new Lexer (s);
  91
  92                                 string temp;
  93                                 if (!lexer.ScanCommentOptional (out temp)) {
  94                                         if (s.Length == 0)
  95                                                 throw new ArgumentException ();
  96
  97                                         throw new FormatException (s);
  98                                 }
  99                         }
 100                 }
 101
 102                 public static class DateTime
 103                 {
 104                         public new static readonly Func<object, string> ToString = l => ((DateTimeOffset) l).ToString ("r", CultureInfo.InvariantCulture);
 105
 106                         public static bool TryParse (string input, out DateTimeOffset result)
 107                         {
 108                                 return Lexer.TryGetDateValue (input, out result);
 109                         }
 110                 }
 111
 112                 public static class EmailAddress
 113                 {
 114                         public static bool TryParse (string input, out string result)
 115                         {
 116                                 try {
 117                                         new MailAddress (input);
 118                                         result = input;
 119                                         return true;
 120                                 } catch {
 121                                         result = null;
 122                                         return false;
 123                                 }
 124                         }
 125                 }
 126
 127                 public static class Int
 128                 {
 129                         public static bool TryParse (string input, out int result)
 130                         {
 131                                 return int.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 132                         }
 133                 }
 134
 135                 public static class Long
 136                 {
 137                         public static bool TryParse (string input, out long result)
 138                         {
 139                                 return long.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 140                         }
 141                 }
 142
 143                 public static class MD5
 144                 {
 145                         public static bool TryParse (string input, out byte[] result)
 146                         {
 147                                 try {
 148                                         result = Convert.FromBase64String (input);
 149                                         return true;
 150                                 } catch {
 151                                         result = null;
 152                                         return false;
 153                                 }
 154                         }
 155                 }
 156
 157                 public static class TimeSpanSeconds
 158                 {
 159                         public static bool TryParse (string input, out TimeSpan result)
 160                         {
 161                                 int value;
 162                                 if (Int.TryParse (input, out value)) {
 163                                         result = TimeSpan.FromSeconds (value);
 164                                         return true;
 165                                 }
 166
 167                                 result = TimeSpan.Zero;
 168                                 return false;
 169                         }
 170                 }
 171
 172                 public static class Uri
 173                 {
 174                         public static bool TryParse (string input, out System.Uri result)
 175                         {
 176                                 return System.Uri.TryCreate (input, UriKind.RelativeOrAbsolute, out result);
 177                         }
 178
 179                         public static void Check (string s)
 180                         {
 181                                 if (s == null)
 182                                         throw new ArgumentNullException ();
 183
 184                                 System.Uri uri;
 185                                 if (!TryParse (s, out uri)) {
 186                                         if (s.Length == 0)
 187                                                 throw new ArgumentException ();
 188
 189                                         throw new FormatException (s);
 190                                 }
 191                         }
 192                 }
 193         }
 194 }