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//
// RangeConditionHeaderValue.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.Globalization;
namespace System.Net.Http.Headers
{
public class RangeConditionHeaderValue : ICloneable
{
public RangeConditionHeaderValue (DateTimeOffset date)
{
Date = date;
}
public RangeConditionHeaderValue (EntityTagHeaderValue entityTag)
{
if (entityTag == null)
throw new ArgumentNullException ("entityTag");
EntityTag = entityTag;
}
public RangeConditionHeaderValue (string entityTag)
: this (new EntityTagHeaderValue (entityTag))
{
}
public DateTimeOffset? Date { get; private set; }
public EntityTagHeaderValue EntityTag { get; private set; }
object ICloneable.Clone ()
{
return MemberwiseClone ();
}
public override bool Equals (object obj)
{
var source = obj as RangeConditionHeaderValue;
if (source == null)
return false;
return EntityTag != null ?
EntityTag.Equals (source.EntityTag) :
Date == source.Date;
}
public override int GetHashCode ()
{
return EntityTag != null ? EntityTag.GetHashCode () : Date.GetHashCode ();
}
public static RangeConditionHeaderValue Parse (string input)
{
RangeConditionHeaderValue value;
if (TryParse (input, out value))
return value;
throw new FormatException (input);
}
public static bool TryParse (string input, out RangeConditionHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
var t = lexer.Scan ();
bool is_weak;
if (t == Token.Type.Token) {
if (lexer.GetStringValue (t) != "W") {
DateTimeOffset date;
if (!Lexer.TryGetDateValue (input, out date))
return false;
parsedValue = new RangeConditionHeaderValue (date);
return true;
}
if (lexer.PeekChar () != '/')
return false;
is_weak = true;
lexer.EatChar ();
t = lexer.Scan ();
} else {
is_weak = false;
}
if (t != Token.Type.QuotedString)
return false;
if (lexer.Scan () != Token.Type.End)
return false;
parsedValue = new RangeConditionHeaderValue (
new EntityTagHeaderValue () {
Tag = lexer.GetStringValue (t),
IsWeak = is_weak
});
return true;
}
public override string ToString ()
{
if (EntityTag != null)
return EntityTag.ToString ();
return Date.Value.ToString ("r", CultureInfo.InvariantCulture);
}
}
}
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