/// <summary>
/// Tries to parse the <c>Coded-URL</c> from a <see cref="StringSource"/>
/// </summary>
/// <param name="source">The <see cref="StringSource"/> to parse the <c>Coded-URL</c> from</param>
/// <param name="codedUrl">The parsed <c>Coded-URL</c></param>
/// <returns><see langword="true"/> when the <c>Coded-URL</c> could be parsed successfully</returns>
internal static bool TryParse([NotNull] StringSource source, out Uri codedUrl)
{
if (!source.AdvanceIf("<"))
{
codedUrl = null;
return(false);
}
// Coded-URL found
var codedUrlText = source.GetUntil('>');
if (codedUrlText == null)
{
throw new ArgumentException($"{source.Remaining} is not a valid Coded-URL (not ending with '>')", nameof(source));
}
source.Advance(1);
codedUrl = new Uri(codedUrlText, UriKind.RelativeOrAbsolute);
return(true);
}
internal static IEnumerable <EntityTag> Parse(StringSource source)
{
while (!source.SkipWhiteSpace())
{
bool isWeak;
if (source.AdvanceIf("W/\"", StringComparison.OrdinalIgnoreCase))
{
isWeak = true;
}
else if (!source.AdvanceIf("\""))
{
break;
}
else
{
isWeak = false;
}
var etagText = source.GetUntil('"');
if (etagText == null)
{
throw new ArgumentException($"{source.Remaining} is not a valid ETag", nameof(source));
}
yield return(new EntityTag(isWeak, etagText));
if (source.Advance(1).SkipWhiteSpace())
{
break;
}
if (!source.AdvanceIf(","))
{
break;
}
}
}