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                                 if (!Lexer.IsValidToken (s)) {
  68                                         if (s.Length == 0)
  69                                                 return false;
  70
  71                                         return false;
  72                                 }
  73
  74                                 return true;
  75                         }
  76
  77                         public static void CheckQuotedString (string s)
  78                         {
  79                                 if (s == null)
  80                                         throw new ArgumentNullException ();
  81
  82                                 var lexer = new Lexer (s);
  83                                 if (lexer.Scan () == Headers.Token.Type.QuotedString && lexer.Scan () == Headers.Token.Type.End)
  84                                         return;
  85
  86                                 if (s.Length == 0)
  87                                         throw new ArgumentException ();
  88
  89                                 throw new FormatException (s);
  90                         }
  91
  92                         public static void CheckComment (string s)
  93                         {
  94                                 if (s == null)
  95                                         throw new ArgumentNullException ();
  96
  97                                 var lexer = new Lexer (s);
  98
  99                                 string temp;
 100                                 if (!lexer.ScanCommentOptional (out temp)) {
 101                                         if (s.Length == 0)
 102                                                 throw new ArgumentException ();
 103
 104                                         throw new FormatException (s);
 105                                 }
 106                         }
 107                 }
 108
 109                 public static class DateTime
 110                 {
 111                         public new static readonly Func<object, string> ToString = l => ((DateTimeOffset) l).ToString ("r", CultureInfo.InvariantCulture);
 112
 113                         public static bool TryParse (string input, out DateTimeOffset result)
 114                         {
 115                                 return Lexer.TryGetDateValue (input, out result);
 116                         }
 117                 }
 118
 119                 public static class EmailAddress
 120                 {
 121                         public static bool TryParse (string input, out string result)
 122                         {
 123                                 try {
 124                                         new MailAddress (input);
 125                                         result = input;
 126                                         return true;
 127                                 } catch {
 128                                         result = null;
 129                                         return false;
 130                                 }
 131                         }
 132                 }
 133
 134                 public static class Int
 135                 {
 136                         public static bool TryParse (string input, out int result)
 137                         {
 138                                 return int.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 139                         }
 140                 }
 141
 142                 public static class Long
 143                 {
 144                         public static bool TryParse (string input, out long result)
 145                         {
 146                                 return long.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 147                         }
 148                 }
 149
 150                 public static class MD5
 151                 {
 152                         public static bool TryParse (string input, out byte[] result)
 153                         {
 154                                 try {
 155                                         result = Convert.FromBase64String (input);
 156                                         return true;
 157                                 } catch {
 158                                         result = null;
 159                                         return false;
 160                                 }
 161                         }
 162                 }
 163
 164                 public static class TimeSpanSeconds
 165                 {
 166                         public static bool TryParse (string input, out TimeSpan result)
 167                         {
 168                                 int value;
 169                                 if (Int.TryParse (input, out value)) {
 170                                         result = TimeSpan.FromSeconds (value);
 171                                         return true;
 172                                 }
 173
 174                                 result = TimeSpan.Zero;
 175                                 return false;
 176                         }
 177                 }
 178
 179                 public static class Uri
 180                 {
 181                         public static bool TryParse (string input, out System.Uri result)
 182                         {
 183                                 return System.Uri.TryCreate (input, UriKind.RelativeOrAbsolute, out result);
 184                         }
 185
 186                         public static void Check (string s)
 187                         {
 188                                 if (s == null)
 189                                         throw new ArgumentNullException ();
 190
 191                                 System.Uri uri;
 192                                 if (!TryParse (s, out uri)) {
 193                                         if (s.Length == 0)
 194                                                 throw new ArgumentException ();
 195
 196                                         throw new FormatException (s);
 197                                 }
 198                         }
 199                 }
 200         }
 201 }