internal static IEnumerable <IfHeaderCondition> Parse([NotNull] StringSource source, [NotNull] EntityTagComparer entityTagComparer)
{
while (!source.SkipWhiteSpace())
{
var isNot = false;
EntityTag?etag = null;
if (source.AdvanceIf("Not", StringComparison.OrdinalIgnoreCase))
{
isNot = true;
source.SkipWhiteSpace();
}
Uri stateToken;
if (CodedUrlParser.TryParse(source, out stateToken))
{
// Coded-URL found
}
else if (source.Get() == '[')
{
// Entity-tag found
etag = EntityTag.Parse(source).Single();
if (!source.AdvanceIf("]"))
{
throw new ArgumentException($"{source.Remaining} is not a valid condition (ETag not ending with ']')", nameof(source));
}
}
else
{
source.Back();
break;
}
yield return(new IfHeaderCondition(isNot, stateToken, etag, entityTagComparer));
}
}
public static IfNoneMatchHeader Parse([CanBeNull] string s, [NotNull] EntityTagComparer etagComparer)
{
if (string.IsNullOrWhiteSpace(s) || s == "*")
{
return(new IfNoneMatchHeader());
}
return(new IfNoneMatchHeader(EntityTag.Parse(s), etagComparer));
}
public static IfNoneMatchHeader Parse([NotNull][ItemNotNull] IEnumerable <string> s, [NotNull] EntityTagComparer etagComparer)
{
var result = new List <EntityTag>();
foreach (var etag in s)
{
if (etag == "*")
{
return(new IfNoneMatchHeader());
}
result.AddRange(EntityTag.Parse(etag));
}
if (result.Count == 0)
{
return(new IfNoneMatchHeader());
}
return(new IfNoneMatchHeader(result, etagComparer));
}