2 // EntityTagHeaderValue.cs
5 // Marek Safar <marek.safar@gmail.com>
7 // Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
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:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
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.
29 using System.Collections.Generic;
31 namespace System.Net.Http.Headers
33 public class EntityTagHeaderValue : ICloneable
35 static readonly EntityTagHeaderValue any = new EntityTagHeaderValue () { Tag = "*" };
37 public EntityTagHeaderValue (string tag)
39 Parser.Token.CheckQuotedString (tag);
43 public EntityTagHeaderValue (string tag, bool isWeak)
49 internal EntityTagHeaderValue ()
53 public static EntityTagHeaderValue Any {
59 public bool IsWeak { get; internal set; }
60 public string Tag { get; internal set; }
62 object ICloneable.Clone ()
64 return MemberwiseClone ();
67 public override bool Equals (object obj)
69 var source = obj as EntityTagHeaderValue;
70 return source != null && source.Tag == Tag &&
71 string.Equals (source.Tag, Tag, StringComparison.Ordinal);
74 public override int GetHashCode ()
76 return IsWeak.GetHashCode () ^ Tag.GetHashCode ();
79 public static EntityTagHeaderValue Parse (string input)
81 EntityTagHeaderValue value;
82 if (TryParse (input, out value))
85 throw new FormatException (input);
88 public static bool TryParse (string input, out EntityTagHeaderValue parsedValue)
90 var lexer = new Lexer (input);
92 if (TryParseElement (lexer, out parsedValue, out token) && token == Token.Type.End)
99 static bool TryParseElement (Lexer lexer, out EntityTagHeaderValue parsedValue, out Token t)
104 bool is_weak = false;
106 if (t == Token.Type.Token) {
107 var s = lexer.GetStringValue (t);
115 if (s != "W" || lexer.PeekChar () != '/')
123 if (t != Token.Type.QuotedString)
126 parsedValue = new EntityTagHeaderValue ();
127 parsedValue.Tag = lexer.GetStringValue (t);
128 parsedValue.IsWeak = is_weak;
135 internal static bool TryParse (string input, int minimalCount, out List<EntityTagHeaderValue> result)
137 return CollectionParser.TryParse (input, minimalCount, TryParseElement, out result);
140 public override string ToString ()