2 // MediaTypeHeaderValue.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 MediaTypeHeaderValue : ICloneable
35 internal List<NameValueHeaderValue> parameters;
38 public MediaTypeHeaderValue (string mediaType)
40 MediaType = mediaType;
43 protected MediaTypeHeaderValue (MediaTypeHeaderValue source)
46 throw new ArgumentNullException ("source");
48 media_type = source.media_type;
49 if (source.parameters != null) {
50 foreach (var item in source.parameters)
51 Parameters.Add (new NameValueHeaderValue (item));
55 internal MediaTypeHeaderValue ()
59 public string CharSet {
61 if (parameters == null)
64 var found = parameters.Find (l => StringComparer.OrdinalIgnoreCase.Equals (l.Name, "charset"));
72 if (parameters == null)
73 parameters = new List<NameValueHeaderValue> ();
75 var found = parameters.Find (l => StringComparer.OrdinalIgnoreCase.Equals (l.Name, "charset"));
76 if (string.IsNullOrEmpty (value)) {
78 parameters.Remove (found);
83 parameters.Add (new NameValueHeaderValue ("charset", value));
89 public string MediaType {
95 throw new ArgumentNullException ("MediaType");
98 if (TryParseMediaType (new Lexer (value), out temp) != Token.Type.End)
99 throw new FormatException ();
105 public ICollection<NameValueHeaderValue> Parameters {
107 return parameters ?? (parameters = new List<NameValueHeaderValue> ());
111 object ICloneable.Clone ()
113 return new MediaTypeHeaderValue (this);
116 public override bool Equals (object obj)
118 var source = obj as MediaTypeHeaderValue;
122 return string.Equals (source.media_type, media_type, StringComparison.OrdinalIgnoreCase) &&
123 source.parameters.SequenceEqual (parameters);
126 public override int GetHashCode ()
128 return media_type.ToLowerInvariant ().GetHashCode () ^ HashCodeCalculator.Calculate (parameters);
131 public static MediaTypeHeaderValue Parse (string input)
133 MediaTypeHeaderValue value;
134 if (TryParse (input, out value))
137 throw new FormatException (input);
140 public override string ToString ()
142 if (parameters == null)
145 return media_type + CollectionExtensions.ToString (parameters);
148 public static bool TryParse (string input, out MediaTypeHeaderValue parsedValue)
152 var lexer = new Lexer (input);
155 List<NameValueHeaderValue> parameters = null;
156 var token = TryParseMediaType (lexer, out media);
160 switch (token.Value.Kind) {
161 case Token.Type.SeparatorSemicolon:
162 if (!NameValueHeaderValue.ParseParameters (lexer, out parameters))
171 parsedValue = new MediaTypeHeaderValue () {
173 parameters = parameters
179 internal static bool TryParse<T> (string input, out T parsedValue, Func<T> factory) where T : MediaTypeHeaderValue
183 var lexer = new Lexer (input);
186 List<NameValueHeaderValue> parameters = null;
187 var token = TryParseMediaType (lexer, out media);
191 switch (token.Value.Kind) {
192 case Token.Type.SeparatorSemicolon:
193 if (!NameValueHeaderValue.ParseParameters (lexer, out parameters))
202 parsedValue = factory ();
203 parsedValue.media_type = media;
204 parsedValue.parameters = parameters;
209 static Token? TryParseMediaType (Lexer lexer, out string media)
213 var token = lexer.Scan ();
214 if (token != Token.Type.Token)
217 if (lexer.Scan () != Token.Type.SeparatorSlash)
220 var token2 = lexer.Scan ();
221 if (token2 != Token.Type.Token)
224 media = lexer.GetStringValue (token) + "/" + lexer.GetStringValue (token2);
226 return lexer.Scan ();