/// <summary>
/// Reads a memory store by trying to dereference the given Uri
/// </summary>
public static RDFMemoryStore FromUri(Uri uri, int timeoutMilliseconds = 20000)
{
RDFMemoryStore result = new RDFMemoryStore();
if (uri?.IsAbsoluteUri ?? false)
{
Uri remappedUri = RDFModelUtilities.RemapUriForDereference(uri);
try
{
HttpWebRequest webRequest = WebRequest.CreateHttp(remappedUri);
webRequest.MaximumAutomaticRedirections = 3;
webRequest.AllowAutoRedirect = true;
webRequest.Timeout = timeoutMilliseconds;
//N-QUADS
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/n-quads");
//TRIX
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/trix");
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
if (webRequest.HaveResponse)
{
//N-QUADS
if (string.IsNullOrEmpty(webResponse.ContentType) ||
webResponse.ContentType.Contains("application/n-quads"))
{
result = FromStream(RDFStoreEnums.RDFFormats.NQuads, webResponse.GetResponseStream());
}
//TRIX
else if (webResponse.ContentType.Contains("application/trix"))
{
result = FromStream(RDFStoreEnums.RDFFormats.TriX, webResponse.GetResponseStream());
}
}
}
catch (Exception ex)
{
throw new RDFStoreException("Cannot read RDF memory store from Uri because: " + ex.Message);
}
}
else
{
throw new RDFStoreException("Cannot read RDF memory store from Uri because given \"uri\" parameter is null, or it does not represent an absolute Uri.");
}
return(result);
}
/// <summary>
/// Creates a graph by trying to dereference the given Uri
/// </summary>
public static RDFGraph FromUri(Uri uri, int timeoutMilliseconds = 20000)
{
var result = new RDFGraph();
if (uri != null && uri.IsAbsoluteUri)
{
uri = RDFModelUtilities.RemapUriForDereference(uri);
try
{
HttpWebRequest webRequest = WebRequest.CreateHttp(uri);
webRequest.MaximumAutomaticRedirections = 3;
webRequest.AllowAutoRedirect = true;
webRequest.Timeout = timeoutMilliseconds;
//RDF/XML
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/rdf+xml");
//TURTLE
webRequest.Headers.Add(HttpRequestHeader.Accept, "text/turtle");
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/turtle");
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/x-turtle");
//N-TRIPLES
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/n-triples");
//TRIX
webRequest.Headers.Add(HttpRequestHeader.Accept, "application/trix");
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
if (webRequest.HaveResponse)
{
//RDF/XML
if (string.IsNullOrEmpty(webResponse.ContentType) ||
webResponse.ContentType.Contains("application/rdf+xml"))
{
result = FromStream(RDFModelEnums.RDFFormats.RdfXml, webResponse.GetResponseStream(), webRequest.Address);
}
//TURTLE
else if (webResponse.ContentType.Contains("text/turtle") ||
webResponse.ContentType.Contains("application/turtle") ||
webResponse.ContentType.Contains("application/x-turtle"))
{
result = FromStream(RDFModelEnums.RDFFormats.Turtle, webResponse.GetResponseStream(), webRequest.Address);
}
//N-TRIPLES
else if (webResponse.ContentType.Contains("application/n-triples"))
{
result = FromStream(RDFModelEnums.RDFFormats.NTriples, webResponse.GetResponseStream(), webRequest.Address);
}
//TRIX
else if (webResponse.ContentType.Contains("application/trix"))
{
result = FromStream(RDFModelEnums.RDFFormats.TriX, webResponse.GetResponseStream(), webRequest.Address);
}
}
}
catch (Exception ex)
{
throw new RDFModelException("Cannot read RDF graph from Uri because: " + ex.Message);
}
}
else
{
throw new RDFModelException("Cannot read RDF graph from Uri because given \"uri\" parameter is null, or it does not represent an absolute Uri.");
}
return(result);
}
