private static RemoteDocument LoadJson(Uri remoteRef, JsonLdLoaderOptions loaderOptions,
JsonLdProcessorOptions options)
{
return(options.DocumentLoader != null
? options.DocumentLoader(remoteRef, loaderOptions)
: DefaultDocumentLoader.LoadJson(remoteRef, loaderOptions));
}
public static RemoteDocument LoadJson(Uri remoteRef, JsonLdLoaderOptions loaderOptions)
{
var client = new RedirectingWebClient();
client.Headers.Set(HttpRequestHeader.Accept, "application/ld+json;q=1.0, application/json;q=0.9, */*+json;q=0.8");
var responseString = client.DownloadString(remoteRef);
var contentType = client.ResponseHeaders.GetValues("Content-Type");
bool matchesContentType =
contentType != null &&
contentType.Any(x => x.Contains("application/json") ||
(x.Contains("application/ld+json") &&
string.IsNullOrEmpty(loaderOptions.RequestProfile)) ||
(x.Contains("application/ld+json") &&
!string.IsNullOrEmpty(loaderOptions.RequestProfile) &&
x.Contains(loaderOptions.RequestProfile)) ||
x.Contains("+json"));
var documentUrl = client.ResponseUri;
string contextLink = null;
if (!matchesContentType)
{
var contextLinks = ParseLinkHeaders(client.ResponseHeaders.GetValues("Link"));
var alternateLink = contextLinks.FirstOrDefault(link =>
link.RelationTypes.Contains("alternate") && link.MediaTypes.Contains("application/ld+json"));
if (alternateLink != null)
{
return(LoadJson(new Uri(remoteRef, alternateLink.LinkValue), loaderOptions));
}
else
{
throw new JsonLdProcessorException(JsonLdErrorCode.LoadingDocumentFailed,
"Loading document failed. The server did not respond with a processable JSON document.");
}
}
// If content type is application/ld+json the context link header is ignored
if (!contentType.Any(x => x.Contains("application/ld+json")))
{
var contextLinks = ParseLinkHeaders(client.ResponseHeaders.GetValues("Link"))
.Where(x => x.RelationTypes.Contains(JsonLdVocabulary.Context))
.Select(x => x.LinkValue).ToList();
if (contextLinks.Count > 1)
{
throw new JsonLdProcessorException(JsonLdErrorCode.MultipleContextLinkHeaders, "Multiple context link headers");
}
contextLink = contextLinks.FirstOrDefault();
}
var ret = new RemoteDocument
{
ContextUrl = contextLink == null ? null : new Uri(contextLink),
DocumentUrl = client.ResponseUri,
Document = JToken.Parse(responseString),
};
return(ret);
}
