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static private Find ( ObjectCollection |
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internal static void SetQuality(ObjectCollection <NameValueHeaderValue> parameters, double?value)
{
Debug.Assert(parameters != null);
NameValueHeaderValue?qualityParameter = NameValueHeaderValue.Find(parameters, qualityName);
if (value.HasValue)
{
// Note that even if we check the value here, we can't prevent a user from adding an invalid quality
// value using Parameters.Add(). Even if we would prevent the user from adding an invalid value
// using Parameters.Add() they could always add invalid values using HttpHeaders.AddWithoutValidation().
// So this check is really for convenience to show users that they're trying to add an invalid
// value.
if ((value < 0) || (value > 1))
{
throw new ArgumentOutOfRangeException(nameof(value));
}
string qualityString = ((double)value).ToString("0.0##", NumberFormatInfo.InvariantInfo);
if (qualityParameter != null)
{
qualityParameter.Value = qualityString;
}
else
{
parameters.Add(new NameValueHeaderValue(qualityName, qualityString));
}
}
else
{
// Remove quality parameter
if (qualityParameter != null)
{
parameters.Remove(qualityParameter);
}
}
}
internal static double?GetQuality(UnvalidatedObjectCollection <NameValueHeaderValue> parameters)
{
Debug.Assert(parameters != null);
NameValueHeaderValue?qualityParameter = NameValueHeaderValue.Find(parameters, qualityName);
if (qualityParameter != null)
{
// Note that the RFC requires decimal '.' regardless of the culture. I.e. using ',' as decimal
// separator is considered invalid (even if the current culture would allow it).
double qualityValue;
if (double.TryParse(qualityParameter.Value, NumberStyles.AllowDecimalPoint,
NumberFormatInfo.InvariantInfo, out qualityValue))
{
return(qualityValue);
}
// If the stored value is an invalid quality value, just return null and log a warning.
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Error(null, SR.Format(SR.net_http_log_headers_invalid_quality, qualityParameter.Value));
}
}
return(null);
}
internal static double?GetQuality(ObjectCollection <NameValueHeaderValue> parameters)
{
Contract.Requires(parameters != null);
NameValueHeaderValue qualityParameter = NameValueHeaderValue.Find(parameters, qualityName);
if (qualityParameter != null)
{
// Note that the RFC requires decimal '.' regardless of the culture. I.e. using ',' as decimal
// separator is considered invalid (even if the current culture would allow it).
double qualityValue = 0;
if (double.TryParse(qualityParameter.Value, NumberStyles.AllowDecimalPoint,
NumberFormatInfo.InvariantInfo, out qualityValue))
{
return(qualityValue);
}
// If the stored value is an invalid quality value, just return null and log a warning.
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.PrintError(NetEventSource.ComponentType.Http, string.Format(System.Globalization.CultureInfo.InvariantCulture, SR.net_http_log_headers_invalid_quality, qualityParameter.Value));
}
}
return(null);
}
