public static bool TryParse(string linkHeaderValue, out WebLink result)
{
var fields = linkHeaderValue.Split(';').Select(x => x.Trim()).ToList();
var linkValue = fields.First().TrimStart('<').TrimEnd('>');
var relTypes = new List <string>();
var mediaTypes = new List <string>();
foreach (var field in fields)
{
var split = field.Split(new char[] { '=' }, 2);
if (split.Length == 2)
{
var key = split[0].Trim();
var value = split[1].Trim();
if (key.Equals("rel"))
{
value = value.Trim('"');
relTypes.AddRange(value.Split(' '));
}
else if (key.Equals("type"))
{
value = value.Trim('"');
mediaTypes.Add(value);
}
}
}
result = new WebLink {
LinkValue = linkValue, RelationTypes = relTypes, MediaTypes = mediaTypes
};
return(true);
}
public void ParseSimpleLinkHeader()
{
var isValid = WebLink.TryParse("<http://example.org/foo.json>", out var link);
Assert.True(isValid);
Assert.Equal("http://example.org/foo.json", link.LinkValue);
}
public void ItCanParseAQuotedMediaType()
{
var isValid = WebLink.TryParse("<http://example.org/foo.json>;type=\"application/ld+json\"", out var link);
Assert.True(isValid);
Assert.Equal(new[] { "application/ld+json" }, link.MediaTypes);
}
public void ItCanParseMultipleValuesFromTheRelField()
{
var isValid = WebLink.TryParse("<http://example.org/foo.json>;rel=\"rel1 rel2\"", out var link);
Assert.True(isValid);
Assert.Equal(new[] { "rel1", "rel2" }, link.RelationTypes);
}
private static IEnumerable <WebLink> ParseLinkHeaders(IEnumerable <string> linkHeaderValues)
{
foreach (var linkHeaderValue in linkHeaderValues)
{
if (WebLink.TryParse(linkHeaderValue, out var link))
{
yield return(link);
}
}
}
public void ItCanParseMultipleFields()
{
var isValid = WebLink.TryParse("<http://example.org/foo.json>;type=\"application/ld+json\";rel=alternate",
out var link);
Assert.True(isValid);
Assert.Equal(new[] { "application/ld+json" }, link.MediaTypes);
Assert.Equal(new string[] { "alternate" }, link.RelationTypes);
Assert.Equal("http://example.org/foo.json", link.LinkValue);
}
