138 lines
3.5 KiB
C#
138 lines
3.5 KiB
C#
//
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// RangeConditionHeaderValue.cs
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//
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// Authors:
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Globalization;
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namespace System.Net.Http.Headers
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{
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public class RangeConditionHeaderValue : ICloneable
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{
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public RangeConditionHeaderValue (DateTimeOffset date)
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{
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Date = date;
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}
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public RangeConditionHeaderValue (EntityTagHeaderValue entityTag)
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{
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if (entityTag == null)
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throw new ArgumentNullException ("entityTag");
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EntityTag = entityTag;
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}
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public RangeConditionHeaderValue (string entityTag)
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: this (new EntityTagHeaderValue (entityTag))
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{
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}
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public DateTimeOffset? Date { get; private set; }
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public EntityTagHeaderValue EntityTag { get; private set; }
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object ICloneable.Clone ()
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{
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return MemberwiseClone ();
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}
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public override bool Equals (object obj)
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{
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var source = obj as RangeConditionHeaderValue;
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if (source == null)
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return false;
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return EntityTag != null ?
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EntityTag.Equals (source.EntityTag) :
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Date == source.Date;
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}
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public override int GetHashCode ()
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{
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return EntityTag != null ? EntityTag.GetHashCode () : Date.GetHashCode ();
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}
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public static RangeConditionHeaderValue Parse (string input)
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{
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RangeConditionHeaderValue value;
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if (TryParse (input, out value))
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return value;
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throw new FormatException (input);
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}
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public static bool TryParse (string input, out RangeConditionHeaderValue parsedValue)
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{
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parsedValue = null;
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var lexer = new Lexer (input);
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var t = lexer.Scan ();
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bool is_weak;
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if (t == Token.Type.Token) {
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if (lexer.GetStringValue (t) != "W") {
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DateTimeOffset date;
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if (!Lexer.TryGetDateValue (input, out date))
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return false;
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parsedValue = new RangeConditionHeaderValue (date);
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return true;
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}
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if (lexer.PeekChar () != '/')
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return false;
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is_weak = true;
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lexer.EatChar ();
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t = lexer.Scan ();
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} else {
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is_weak = false;
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}
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if (t != Token.Type.QuotedString)
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return false;
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if (lexer.Scan () != Token.Type.End)
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return false;
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parsedValue = new RangeConditionHeaderValue (
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new EntityTagHeaderValue () {
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Tag = lexer.GetStringValue (t),
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IsWeak = is_weak
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});
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return true;
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}
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public override string ToString ()
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{
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if (EntityTag != null)
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return EntityTag.ToString ();
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return Date.Value.ToString ("r", CultureInfo.InvariantCulture);
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}
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}
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}
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