public static StringWithQualityHeaderValue Parse(string input)
{
var inputArray = input.Split(new[] { ';' }, 2);
var value = inputArray[0].Trim();
// Unspecified q factor value is equal to a match.
var quality = FormattingUtilities.Match;
if (inputArray.Length > 1)
{
var parameter = inputArray[1].Trim();
var nameValuePair = parameter.Split(new[] { '=' }, 2);
if (nameValuePair.Length > 1 && nameValuePair[0].Trim().Equals("q"))
{
// TODO: all extraneous parameters are ignored. Throw/return null if that is the case.
if (!Double.TryParse(nameValuePair[1].Trim(), out quality))
{
return null;
}
}
}
var stringWithQualityHeader = new StringWithQualityHeaderValue()
{
Quality = quality,
Value = value,
RawValue = input
};
return stringWithQualityHeader;
}
public static bool TryParse(string input, out StringWithQualityHeaderValue headerValue)
{
var inputArray = input.Split(new[] { ';' }, 2);
var value = inputArray[0].Trim();
// Unspecified q factor value is equal to a match.
var quality = HttpHeaderUtilitites.Match;
if (inputArray.Length > 1)
{
var parameter = inputArray[1].Trim();
var nameValuePair = parameter.Split(new[] { '=' }, 2);
if (nameValuePair.Length > 1 && nameValuePair[0].Trim().Equals("q"))
{
// TODO: all extraneous parameters are ignored. Throw/return null if that is the case.
if (!double.TryParse(
nameValuePair[1],
NumberStyles.AllowLeadingWhite | NumberStyles.AllowDecimalPoint |
NumberStyles.AllowTrailingWhite,
NumberFormatInfo.InvariantInfo,
out quality))
{
headerValue = null;
return(false);
}
}
}
var stringWithQualityHeader = new StringWithQualityHeaderValue()
{
Quality = quality,
Value = value,
RawValue = input
};
headerValue = stringWithQualityHeader;
return(true);
}
public static IList <StringWithQualityHeaderValue> GetAcceptCharsetHeaders(string acceptCharsetHeader)
{
if (string.IsNullOrEmpty(acceptCharsetHeader))
{
return(null);
}
var acceptCharsetHeaderCollection = new List <StringWithQualityHeaderValue>();
foreach (var item in acceptCharsetHeader.Split(','))
{
StringWithQualityHeaderValue parsedAcceptCharsetHeader;
// If we are unable to parse any of the Accept-Charset Headers, we ignore them completely.
if (!StringWithQualityHeaderValue.TryParse(item, out parsedAcceptCharsetHeader))
{
return(null);
}
acceptCharsetHeaderCollection.Add(parsedAcceptCharsetHeader);
}
return(acceptCharsetHeaderCollection);
}