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//
// MediaTypeHeaderValue.cs
//
// Authors:
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections.Generic;
namespace System.Net.Http.Headers
{
public class MediaTypeHeaderValue : ICloneable
{
internal List<NameValueHeaderValue> parameters;
internal string media_type;
public MediaTypeHeaderValue (string mediaType)
{
MediaType = mediaType;
}
protected MediaTypeHeaderValue (MediaTypeHeaderValue source)
{
if (source == null)
throw new ArgumentNullException ("source");
media_type = source.media_type;
if (source.parameters != null) {
foreach (var item in source.parameters)
Parameters.Add (new NameValueHeaderValue (item));
}
}
internal MediaTypeHeaderValue ()
{
}
public string CharSet {
get {
if (parameters == null)
return null;
var found = parameters.Find (l => string.Equals (l.Name, "charset", StringComparison.OrdinalIgnoreCase));
if (found == null)
return null;
return found.Value;
}
set {
if (parameters == null)
parameters = new List<NameValueHeaderValue> ();
parameters.SetValue ("charset", value);
}
}
public string MediaType {
get {
return media_type;
}
set {
if (value == null)
throw new ArgumentNullException ("MediaType");
string temp;
var token = TryParseMediaType (new Lexer (value), out temp);
if (token == null || token.Value.Kind != Token.Type.End)
throw new FormatException ();
media_type = temp;
}
}
public ICollection<NameValueHeaderValue> Parameters {
get {
return parameters ?? (parameters = new List<NameValueHeaderValue> ());
}
}
object ICloneable.Clone ()
{
return new MediaTypeHeaderValue (this);
}
public override bool Equals (object obj)
{
var source = obj as MediaTypeHeaderValue;
if (source == null)
return false;
return string.Equals (source.media_type, media_type, StringComparison.OrdinalIgnoreCase) &&
source.parameters.SequenceEqual (parameters);
}
public override int GetHashCode ()
{
return media_type.ToLowerInvariant ().GetHashCode () ^ HashCodeCalculator.Calculate (parameters);
}
public static MediaTypeHeaderValue Parse (string input)
{
MediaTypeHeaderValue value;
if (TryParse (input, out value))
return value;
throw new FormatException (input);
}
public override string ToString ()
{
if (parameters == null)
return media_type;
return media_type + CollectionExtensions.ToString (parameters);
}
public static bool TryParse (string input, out MediaTypeHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
string media;
List<NameValueHeaderValue> parameters = null;
var token = TryParseMediaType (lexer, out media);
if (token == null)
return false;
switch (token.Value.Kind) {
case Token.Type.SeparatorSemicolon:
Token t;
if (!NameValueHeaderValue.TryParseParameters (lexer, out parameters, out t) || t != Token.Type.End)
return false;
break;
case Token.Type.End:
break;
default:
return false;
}
parsedValue = new MediaTypeHeaderValue () {
media_type = media,
parameters = parameters
};
return true;
}
internal static Token? TryParseMediaType (Lexer lexer, out string media)
{
media = null;
var token = lexer.Scan ();
if (token != Token.Type.Token)
return null;
if (lexer.Scan () != Token.Type.SeparatorSlash)
return null;
var token2 = lexer.Scan ();
if (token2 != Token.Type.Token)
return null;
media = lexer.GetStringValue (token) + "/" + lexer.GetStringValue (token2);
return lexer.Scan ();
}
}
}
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