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 using System.Collections.Generic;
  32
  33 namespace System.Net.Http.Headers
  34 {
  35         static class Parser
  36         {
  37                 public static class Token
  38                 {
  39                         public static bool TryParse (string input, out string result)
  40                         {
  41                                 if (input != null && Lexer.IsValidToken (input)) {
  42                                         result = input;
  43                                         return true;
  44                                 }
  45
  46                                 result = null;
  47                                 return false;
  48                         }
  49
  50                         public static void Check (string s)
  51                         {
  52                                 if (s == null)
  53                                         throw new ArgumentNullException ();
  54
  55                                 if (!Lexer.IsValidToken (s)) {
  56                                         if (s.Length == 0)
  57                                                 throw new ArgumentException ();
  58
  59                                         throw new FormatException (s);
  60                                 }
  61                         }
  62
  63                         public static bool TryCheck (string s)
  64                         {
  65                                 if (s == null)
  66                                         return false;
  67
  68                                 return Lexer.IsValidToken (s);
  69                         }
  70
  71                         public static void CheckQuotedString (string s)
  72                         {
  73                                 if (s == null)
  74                                         throw new ArgumentNullException ();
  75
  76                                 var lexer = new Lexer (s);
  77                                 if (lexer.Scan () == Headers.Token.Type.QuotedString && lexer.Scan () == Headers.Token.Type.End)
  78                                         return;
  79
  80                                 if (s.Length == 0)
  81                                         throw new ArgumentException ();
  82
  83                                 throw new FormatException (s);
  84                         }
  85
  86                         public static void CheckComment (string s)
  87                         {
  88                                 if (s == null)
  89                                         throw new ArgumentNullException ();
  90
  91                                 var lexer = new Lexer (s);
  92
  93                                 string temp;
  94                                 if (!lexer.ScanCommentOptional (out temp)) {
  95                                         if (s.Length == 0)
  96                                                 throw new ArgumentException ();
  97
  98                                         throw new FormatException (s);
  99                                 }
 100                         }
 101                 }
 102
 103                 public static class DateTime
 104                 {
 105                         public new static readonly Func<object, string> ToString = l => ((DateTimeOffset) l).ToString ("r", CultureInfo.InvariantCulture);
 106
 107                         public static bool TryParse (string input, out DateTimeOffset result)
 108                         {
 109                                 return Lexer.TryGetDateValue (input, out result);
 110                         }
 111                 }
 112
 113                 public static class EmailAddress
 114                 {
 115                         public static bool TryParse (string input, out string result)
 116                         {
 117                                 try {
 118                                         new MailAddress (input);
 119                                         result = input;
 120                                         return true;
 121                                 } catch {
 122                                         result = null;
 123                                         return false;
 124                                 }
 125                         }
 126                 }
 127
 128                 public static class Host
 129                 {
 130                         public static bool TryParse (string input, out string result)
 131                         {
 132                                 result = input;
 133
 134                                 System.Uri dummy;
 135                                 return System.Uri.TryCreate ("http://u@" + input + "/", UriKind.Absolute, out dummy);
 136                         }
 137                 }
 138
 139                 public static class Int
 140                 {
 141                         public static bool TryParse (string input, out int result)
 142                         {
 143                                 return int.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 144                         }
 145                 }
 146
 147                 public static class Long
 148                 {
 149                         public static bool TryParse (string input, out long result)
 150                         {
 151                                 return long.TryParse (input, NumberStyles.None, CultureInfo.InvariantCulture, out result);
 152                         }
 153                 }
 154
 155                 public static class MD5
 156                 {
 157                         public new static readonly Func<object, string> ToString = l => Convert.ToBase64String ((byte[]) l);
 158
 159                         public static bool TryParse (string input, out byte[] result)
 160                         {
 161                                 try {
 162                                         result = Convert.FromBase64String (input);
 163                                         return true;
 164                                 } catch {
 165                                         result = null;
 166                                         return false;
 167                                 }
 168                         }
 169                 }
 170
 171                 public static class TimeSpanSeconds
 172                 {
 173                         public static bool TryParse (string input, out TimeSpan result)
 174                         {
 175                                 int value;
 176                                 if (Int.TryParse (input, out value)) {
 177                                         result = TimeSpan.FromSeconds (value);
 178                                         return true;
 179                                 }
 180
 181                                 result = TimeSpan.Zero;
 182                                 return false;
 183                         }
 184                 }
 185
 186                 public static class Uri
 187                 {
 188                         public static bool TryParse (string input, out System.Uri result)
 189                         {
 190                                 return System.Uri.TryCreate (input, UriKind.RelativeOrAbsolute, out result);
 191                         }
 192
 193                         public static void Check (string s)
 194                         {
 195                                 if (s == null)
 196                                         throw new ArgumentNullException ();
 197
 198                                 System.Uri uri;
 199                                 if (!TryParse (s, out uri)) {
 200                                         if (s.Length == 0)
 201                                                 throw new ArgumentException ();
 202
 203                                         throw new FormatException (s);
 204                                 }
 205                         }
 206                 }
 207         }
 208 }