public override bool Equals(Object value)
{
DecoderExceptionFallback that = value as DecoderExceptionFallback;
if (that != null)
{
return(true);
}
return(false);
}
/// <summary>Gets the best encoding available for the specified charset request.</summary>
/// <param name="acceptCharset">
/// The Accept-Charset header value (eg: "iso-8859-5, unicode-1-1;q=0.8").
/// </param>
/// <returns>An Encoding object appropriate to the specifed charset request.</returns>
internal static Encoding EncodingFromAcceptCharset(string acceptCharset)
{
// Determines the appropriate encoding mapping according to
// RFC 2616.14.2 (http://tools.ietf.org/html/rfc2616#section-14.2).
Encoding result = null;
if (!string.IsNullOrEmpty(acceptCharset))
{
// PERF: keep a cache of original strings to resolved Encoding.
List<CharsetPart> parts = new List<CharsetPart>(AcceptCharsetParts(acceptCharset));
parts.Sort(delegate(CharsetPart x, CharsetPart y)
{
return y.Quality - x.Quality;
});
var encoderFallback = new EncoderExceptionFallback();
var decoderFallback = new DecoderExceptionFallback();
foreach (CharsetPart part in parts)
{
if (part.Quality > 0)
{
// When UTF-8 is specified, select the version that doesn't use the BOM.
if (String.Compare("utf-8", part.Charset, StringComparison.OrdinalIgnoreCase) == 0)
{
result = FallbackEncoding;
break;
}
else
{
try
{
result = Encoding.GetEncoding(part.Charset, encoderFallback, decoderFallback);
break;
}
catch (ArgumentException)
{
// This exception is thrown when the character
// set isn't supported - it is ignored so
// other possible charsets are evaluated.
}
}
}
}
}
// No Charset was specifed, or if charsets were specified, no valid charset was found.
// Returning a different charset is also valid.
if (result == null)
{
result = FallbackEncoding;
}
return result;
}
internal static Encoding EncodingFromAcceptCharset(string acceptCharset)
{
Encoding result = null;
if (!string.IsNullOrEmpty(acceptCharset))
{
List<CharsetPart> parts = new List<CharsetPart>(AcceptCharsetParts(acceptCharset));
parts.Sort(delegate(CharsetPart x, CharsetPart y)
{
return y.Quality - x.Quality;
});
var encoderFallback = new EncoderExceptionFallback();
var decoderFallback = new DecoderExceptionFallback();
foreach (CharsetPart part in parts)
{
if (part.Quality > 0)
{
if (String.Compare("utf-8", part.Charset, StringComparison.OrdinalIgnoreCase) == 0)
{
result = FallbackEncoding;
break;
}
else
{
try
{
result = Encoding.GetEncoding(part.Charset, encoderFallback, decoderFallback);
break;
}
catch (ArgumentException)
{
}
}
}
}
}
if (result == null)
{
result = FallbackEncoding;
}
return result;
}
internal static Encoding EncodingFromAcceptCharset(string acceptCharset)
{
Encoding fallbackEncoding = null;
if (!string.IsNullOrEmpty(acceptCharset))
{
List<CharsetPart> list = new List<CharsetPart>(AcceptCharsetParts(acceptCharset));
list.Sort((Comparison<CharsetPart>) ((x, y) => (y.Quality - x.Quality)));
EncoderExceptionFallback encoderFallback = new EncoderExceptionFallback();
DecoderExceptionFallback decoderFallback = new DecoderExceptionFallback();
foreach (CharsetPart part in list)
{
if (part.Quality > 0)
{
if (string.Compare("UTF-8", part.Charset, StringComparison.OrdinalIgnoreCase) == 0)
{
fallbackEncoding = FallbackEncoding;
break;
}
try
{
fallbackEncoding = Encoding.GetEncoding(part.Charset, encoderFallback, decoderFallback);
break;
}
catch (ArgumentException)
{
}
}
}
}
return (fallbackEncoding ?? FallbackEncoding);
}