public void RunVocab(String[] args)
{
if (args.Length < 2)
{
Console.Error.WriteLine("rdfWebDeploy: Error: 2 Arguments are required in order to use the -vocab mode");
return;
}
if (File.Exists(args[1]))
{
Console.Error.WriteLine("rdfWebDeploy: Error: Cannot output the configuration vocabulary to " + args[1] + " as a file already exists at that location");
return;
}
TurtleParser ttlparser = new TurtleParser();
StreamReader reader = new StreamReader(Assembly.GetAssembly(typeof(IGraph)).GetManifestResourceStream("VDS.RDF.Configuration.configuration.ttl"));
Graph g = new Graph();
ttlparser.Load(g, reader);
IRdfWriter writer;
try
{
writer = MimeTypesHelper.GetWriter(MimeTypesHelper.GetMimeType(Path.GetExtension(args[1])));
}
catch (RdfWriterSelectionException)
{
writer = new CompressingTurtleWriter(WriterCompressionLevel.High);
}
writer.Save(g, args[1]);
Console.WriteLine("rdfWebDeploy: Configuration Vocabulary output to " + args[1]);
}
/// <summary>
/// Processes a HEAD operation
/// </summary>
/// <param name="context">HTTP Context</param>
public override void ProcessHead(IHttpContext context)
{
//Work out the Graph URI we want to get
Uri graphUri = this.ResolveGraphUri(context);
try
{
bool exists = this.HasGraph(graphUri);
if (exists)
{
//Send the Content Type we'd select based on the Accept header to the user
String ctype;
IRdfWriter writer = MimeTypesHelper.GetWriter(HandlerHelper.GetAcceptTypes(context), out ctype);
context.Response.ContentType = ctype;
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.NotFound;
}
}
catch (RdfQueryException)
{
//If the GetGraph() method errors this implies that the Store does not contain the Graph
//In such a case we should return a 404
context.Response.StatusCode = (int)HttpStatusCode.NotFound;
return;
}
}
/// <summary>
/// Internal Helper function which returns the Results back to the Client in one of their accepted formats
/// </summary>
/// <param name="context">Context of the HTTP Request</param>
/// <param name="result">Results of the Sparql Query</param>
protected void ProcessQueryResults(HttpServerContext context, Object result)
{
//Return the Results
String ctype;
if (result is SparqlResultSet)
{
//Get the appropriate Writer and set the Content Type
ISparqlResultsWriter sparqlwriter;
if (context.Request.AcceptTypes != null)
{
sparqlwriter = MimeTypesHelper.GetSparqlWriter(context.Request.AcceptTypes, out ctype);
}
else
{
//Default to SPARQL XML Results Format if no accept header
sparqlwriter = new SparqlXmlWriter();
ctype = "application/sparql-results+xml";
}
context.Response.ContentType = ctype;
if (sparqlwriter is IHtmlWriter)
{
((IHtmlWriter)sparqlwriter).Stylesheet = this._config.Stylesheet;
}
//Send Result Set to Client
sparqlwriter.Save((SparqlResultSet)result, new StreamWriter(context.Response.OutputStream));
}
else if (result is Graph)
{
//Get the appropriate Writer and set the Content Type
IRdfWriter rdfwriter = MimeTypesHelper.GetWriter(context.Request.AcceptTypes, out ctype);
context.Response.ContentType = ctype;
if (rdfwriter is IHtmlWriter)
{
((IHtmlWriter)rdfwriter).Stylesheet = this._config.Stylesheet;
}
//Send Graph to Client
rdfwriter.Save((Graph)result, new StreamWriter(context.Response.OutputStream));
}
else
{
throw new RdfQueryException("Unexpected Query Result Object of Type '" + result.GetType().ToString() + "' returned");
}
}
/// <summary>
/// Sends the given Graph to the Client via the HTTP Response.
/// </summary>
/// <param name="context">HTTP Context.</param>
/// <param name="g">Graph to send.</param>
protected void SendResultsToClient(IHttpContext context, IGraph g)
{
IRdfWriter writer;
String ctype;
// Look up the MIME Type Definition - if none use GetWriter instead
MimeTypeDefinition definition = MimeTypesHelper.GetDefinitions(context.GetAcceptTypes()).FirstOrDefault(d => d.CanWriteRdf);
if (definition != null)
{
writer = definition.GetRdfWriter();
ctype = definition.CanonicalMimeType;
}
else
{
writer = MimeTypesHelper.GetWriter(context.GetAcceptTypes(), out ctype);
}
// Set up the Writer
if (writer is ICompressingWriter)
{
((ICompressingWriter)writer).CompressionLevel = Options.DefaultCompressionLevel;
}
// Send Content to Client
context.Response.ContentType = ctype;
if (definition != null)
{
context.Response.ContentEncoding = definition.Encoding;
writer.Save(g, new StreamWriter(context.Response.OutputStream, definition.Encoding));
}
else
{
writer.Save(g, new StreamWriter(context.Response.OutputStream));
}
}
/// <summary>
/// Helper function which returns the Results (Graph/Triple Store/SPARQL Results) back to the Client in one of their accepted formats
/// </summary>
/// <param name="context">Context of the HTTP Request</param>
/// <param name="result">Results of the Sparql Query</param>
/// <param name="config">Handler Configuration</param>
public static void SendToClient(HttpContext context, Object result, BaseHandlerConfiguration config)
{
MimeTypeDefinition definition = null;
String ctype = "text/plain";
String[] acceptTypes = HandlerHelper.GetAcceptTypes(context);
//Return the Results
if (result is SparqlResultSet)
{
ISparqlResultsWriter sparqlWriter = null;
//Try and get a MIME Type Definition using the HTTP Requests Accept Header
if (acceptTypes != null)
{
definition = MimeTypesHelper.GetDefinitions(acceptTypes).FirstOrDefault(d => d.CanWriteSparqlResults);
}
//Try and get the registered Definition for SPARQL Results XML
if (definition == null)
{
definition = MimeTypesHelper.GetDefinitions(MimeTypesHelper.SparqlXml[0]).FirstOrDefault();
}
//If Definition is still null create a temporary definition
if (definition == null)
{
definition = new MimeTypeDefinition("SPARQL Results XML", MimeTypesHelper.SparqlXml, Enumerable.Empty <String>());
definition.SparqlResultsWriterType = typeof(VDS.RDF.Writing.SparqlXmlWriter);
}
//Set up the Writer appropriately
sparqlWriter = definition.GetSparqlResultsWriter();
context.Response.ContentType = definition.CanonicalMimeType;
HandlerHelper.ApplyWriterOptions(sparqlWriter, config);
//Clear any existing Response
context.Response.Clear();
//Send Result Set to Client
context.Response.ContentEncoding = definition.Encoding;
sparqlWriter.Save((SparqlResultSet)result, new StreamWriter(context.Response.OutputStream, definition.Encoding));
}
else if (result is IGraph)
{
IRdfWriter rdfWriter = null;
//Try and get a MIME Type Definition using the HTTP Requests Accept Header
if (acceptTypes != null)
{
definition = MimeTypesHelper.GetDefinitions(acceptTypes).FirstOrDefault(d => d.CanWriteRdf);
}
if (definition == null)
{
//If no appropriate definition then use the GetWriter method instead
rdfWriter = MimeTypesHelper.GetWriter(acceptTypes, out ctype);
}
else
{
rdfWriter = definition.GetRdfWriter();
}
//Setup the writer
if (definition != null)
{
ctype = definition.CanonicalMimeType;
}
context.Response.ContentType = ctype;
HandlerHelper.ApplyWriterOptions(rdfWriter, config);
//Clear any existing Response
context.Response.Clear();
//Send Graph to Client
if (definition != null)
{
context.Response.ContentEncoding = definition.Encoding;
rdfWriter.Save((IGraph)result, new StreamWriter(context.Response.OutputStream, definition.Encoding));
}
else
{
rdfWriter.Save((IGraph)result, new StreamWriter(context.Response.OutputStream));
}
}
else if (result is ITripleStore)
{
IStoreWriter storeWriter = null;
//Try and get a MIME Type Definition using the HTTP Requests Accept Header
if (acceptTypes != null)
{
definition = MimeTypesHelper.GetDefinitions(acceptTypes).FirstOrDefault(d => d.CanWriteRdfDatasets);
}
if (definition == null)
{
//If no appropriate definition then use the GetStoreWriter method instead
storeWriter = MimeTypesHelper.GetStoreWriter(acceptTypes, out ctype);
}
else
{
storeWriter = definition.GetRdfDatasetWriter();
}
//Setup the writer
if (definition != null)
{
ctype = definition.CanonicalMimeType;
}
context.Response.ContentType = ctype;
HandlerHelper.ApplyWriterOptions(storeWriter, config);
//Clear any existing Response
context.Response.Clear();
//Send Triple Store to Client
if (definition != null)
{
context.Response.ContentEncoding = definition.Encoding;
storeWriter.Save((ITripleStore)result, new VDS.RDF.Storage.Params.StreamParams(context.Response.OutputStream, definition.Encoding));
}
else
{
storeWriter.Save((ITripleStore)result, new VDS.RDF.Storage.Params.StreamParams(context.Response.OutputStream));
}
}
else if (result is ISparqlDataset)
{
//Wrap in a Triple Store and then call self so the Triple Store writing branch of this if gets called instead
TripleStore store = new TripleStore(new DatasetGraphCollection((ISparqlDataset)result));
HandlerHelper.SendToClient(context, store, config);
}
else
{
throw new RdfOutputException("Unexpected Result Object of Type '" + result.GetType().ToString() + "' returned - unable to write Objects of this Type to the HTTP Response");
}
}
private bool SetOptions(String[] args)
{
if (args.Length == 0 || args.Length == 1 && args[0].Equals("-help"))
{
this.ShowUsage();
return(false);
}
String arg;
int i = 0;
while (i < args.Length)
{
arg = args[i];
if (arg.StartsWith("-uri:"))
{
if (this._mode == RdfQueryMode.Remote)
{
Console.Error.WriteLine("rdfQuery: Cannot specify input URIs as well as specifying a remote endpoint to query");
return(false);
}
String uri = arg.Substring(5);
try
{
this._mode = RdfQueryMode.Local;
//Try and parse RDF from the given URI
if (!this._print)
{
Uri u = new Uri(uri);
Graph g = new Graph();
UriLoader.Load(g, u);
this._store.Add(g);
}
else
{
Console.Error.WriteLine("rdfQuery: Ignoring the input URI '" + uri + "' since -print has been specified so the query will not be executed so no need to load the data");
}
}
catch (UriFormatException uriEx)
{
Console.Error.WriteLine("rdfQuery: Ignoring the input URI '" + uri + "' since this is not a valid URI");
if (this._debug)
{
this.DebugErrors(uriEx);
}
}
catch (RdfParseException parseEx)
{
Console.Error.WriteLine("rdfQuery: Ignoring the input URI '" + uri + "' due to the following error:");
Console.Error.WriteLine("rdfQuery: Parser Error: " + parseEx.Message);
if (this._debug)
{
this.DebugErrors(parseEx);
}
}
catch (Exception ex)
{
Console.Error.WriteLine("rdfQuery: Ignoring the input URI '" + uri + "' due to the following error:");
Console.Error.WriteLine("rdfQuery: Error: " + ex.Message);
if (this._debug)
{
this.DebugErrors(ex);
}
}
}
else if (arg.StartsWith("-endpoint:"))
{
if (this._mode == RdfQueryMode.Local)
{
Console.Error.WriteLine("rdfQuery: Cannot specify a remote endpoint to query as well as specifying local files and/or input URIs");
return(false);
}
else if (this._mode == RdfQueryMode.Remote)
{
if (!(this._endpoint is FederatedSparqlRemoteEndpoint))
{
this._endpoint = new FederatedSparqlRemoteEndpoint(this._endpoint);
}
}
try
{
this._mode = RdfQueryMode.Remote;
if (this._endpoint is FederatedSparqlRemoteEndpoint)
{
((FederatedSparqlRemoteEndpoint)this._endpoint).AddEndpoint(new SparqlRemoteEndpoint(new Uri(arg.Substring(arg.IndexOf(':') + 1))));
}
else
{
this._endpoint = new SparqlRemoteEndpoint(new Uri(arg.Substring(arg.IndexOf(':') + 1)));
}
}
catch (UriFormatException uriEx)
{
Console.Error.WriteLine("rdfQuery: Unable to use remote endpoint with URI '" + arg.Substring(arg.IndexOf(':') + 1) + "' since this is not a valid URI");
if (this._debug)
{
this.DebugErrors(uriEx);
}
return(false);
}
}
else if (arg.StartsWith("-output:") || arg.StartsWith("-out:"))
{
this._output = arg.Substring(arg.IndexOf(':') + 1);
}
else if (arg.StartsWith("-outformat:"))
{
String format = arg.Substring(arg.IndexOf(':') + 1);
try
{
if (format.Contains("/"))
{
//MIME Type
this._graphWriter = MimeTypesHelper.GetWriter(format);
this._resultsWriter = MimeTypesHelper.GetSparqlWriter(format);
}
else
{
//File Extension
this._graphWriter = MimeTypesHelper.GetWriterByFileExtension(format);
this._resultsWriter = MimeTypesHelper.GetSparqlWriterByFileExtension(format);
}
}
catch (RdfException)
{
Console.Error.WriteLine("rdfQuery: The file extension '" + format + "' could not be used to determine a MIME Type and select a writer - default writers will be used");
}
}
else if (arg.StartsWith("-syntax"))
{
if (arg.Contains(':'))
{
String syntax = arg.Substring(arg.IndexOf(':') + 1);
switch (syntax)
{
case "1":
case "1.0":
this._parser.SyntaxMode = SparqlQuerySyntax.Sparql_1_0;
break;
case "1.1":
this._parser.SyntaxMode = SparqlQuerySyntax.Sparql_1_1;
break;
case "E":
case "e":
this._parser.SyntaxMode = SparqlQuerySyntax.Extended;
break;
default:
Console.Error.WriteLine("rdfQuery: The value '" + syntax + "' is not a valid query syntax specifier - assuming SPARQL 1.1 with Extensions");
this._parser.SyntaxMode = SparqlQuerySyntax.Extended;
break;
}
}
else
{
this._parser.SyntaxMode = SparqlQuerySyntax.Extended;
}
}
else if (arg.StartsWith("-timeout:"))
{
long timeout;
if (Int64.TryParse(arg.Substring(arg.IndexOf(':') + 1), out timeout))
{
this._timeout = timeout;
}
else
{
Console.Error.WriteLine("rdfQuery: The value '" + arg.Substring(arg.IndexOf(':') + 1) + "' is not a valid timeout in milliseconds - default timeouts will be used");
}
}
else if (arg.StartsWith("-r:"))
{
arg = arg.Substring(arg.IndexOf(':') + 1);
switch (arg)
{
case "rdfs":
((IInferencingTripleStore)this._store).AddInferenceEngine(new RdfsReasoner());
break;
case "skos":
((IInferencingTripleStore)this._store).AddInferenceEngine(new SkosReasoner());
break;
default:
Console.Error.WriteLine("rdfQuery: The value '" + arg + "' is not a valid Reasoner - ignoring this option");
break;
}
}
else if (arg.StartsWith("-partialResults"))
{
if (arg.Contains(':'))
{
bool partial;
if (Boolean.TryParse(arg.Substring(arg.IndexOf(':') + 1), out partial))
{
this._partialResults = partial;
}
else
{
Console.Error.WriteLine("rdfQuery: The value '" + arg.Substring(arg.IndexOf(':') + 1) + "' is not a valid boolean - partial results mode is disabled");
}
}
else
{
this._partialResults = true;
}
}
else if (arg.StartsWith("-noopt"))
{
if (arg.Equals("-noopt"))
{
Options.QueryOptimisation = false;
Options.AlgebraOptimisation = false;
}
else if (arg.Length >= 7)
{
String opts = arg.Substring(7);
foreach (char c in opts.ToCharArray())
{
if (c == 'a' || c == 'A')
{
Options.AlgebraOptimisation = false;
}
else if (c == 'q' || c == 'Q')
{
Options.QueryOptimisation = false;
}
else
{
Console.Error.WriteLine("rdfQuery: The value '" + c + "' as part of the -noopt argument is not supported - it has been ignored");
}
}
}
}
else if (arg.Equals("-nocache"))
{
Options.UriLoaderCaching = false;
}
else if (arg.Equals("-nobom"))
{
Options.UseBomForUtf8 = false;
}
else if (arg.Equals("-print"))
{
this._print = true;
}
else if (arg.Equals("-debug"))
{
this._debug = true;
}
else if (arg.StartsWith("-explain"))
{
this._explain = true;
if (arg.Length > 9)
{
try
{
this._level = (ExplanationLevel)Enum.Parse(typeof(ExplanationLevel), arg.Substring(9));
this._level = (this._level | ExplanationLevel.OutputToConsoleStdErr | ExplanationLevel.Simulate) ^ ExplanationLevel.OutputToConsoleStdOut;
}
catch
{
Console.Error.WriteLine("rdfQuery: The argument '" + arg + "' does not specify a valid Explanation Level");
return(false);
}
}
}
else if (arg.Equals("-help"))
{
//Ignore Help Argument if other arguments present
}
else if (arg.StartsWith("-"))
{
//Report Invalid Argument
Console.Error.WriteLine("rdfQuery: The argument '" + arg + "' is not a supported argument - it has been ignored");
}
else if (i == args.Length - 1)
{
//Last Argument must be the Query
this._query = arg;
}
else
{
//Treat as an input file
if (this._mode == RdfQueryMode.Remote)
{
Console.Error.WriteLine("rdfQuery: Cannot specify local files as well as specifying a remote endpoint to query");
return(false);
}
try
{
this._mode = RdfQueryMode.Local;
//Try and parse RDF from the given file
if (!this._print)
{
Graph g = new Graph();
FileLoader.Load(g, arg);
this._store.Add(g);
}
else
{
Console.Error.WriteLine("rdfQuery: Ignoring the local file '" + arg + "' since -print has been specified so the query will not be executed so no need to load the data");
}
}
catch (RdfParseException parseEx)
{
Console.Error.WriteLine("rdfQuery: Ignoring the local file '" + arg + "' due to the following error:");
Console.Error.WriteLine("rdfQuery: Parser Error: " + parseEx.Message);
if (this._debug)
{
this.DebugErrors(parseEx);
}
}
catch (Exception ex)
{
Console.Error.WriteLine("rdfQuery: Ignoring the local file '" + arg + "' due to the following error:");
Console.Error.WriteLine("rdfQuery: Error: " + ex.Message);
if (this._debug)
{
this.DebugErrors(ex);
}
}
}
i++;
}
return(true);
}
public void Run()
{
if (this._args.Length == 0)
{
this.ShowUsage();
}
else
{
if (!this.ParseOptions())
{
Console.Error.WriteLine("rdfOptStats: Error: One/More options were invalid");
return;
}
if (this._inputs.Count == 0)
{
Console.Error.WriteLine("rdfOptStats: Error: No Inputs Specified");
return;
}
List <BaseStatsHandler> handlers = new List <BaseStatsHandler>();
if (this._subjects && this._predicates && this._objects)
{
handlers.Add(new SPOStatsHandler(this._literals));
}
else if (this._subjects && this._predicates)
{
handlers.Add(new SPStatsHandler(this._literals));
}
else
{
if (this._subjects)
{
handlers.Add(new SubjectStatsHandler(this._literals));
}
if (this._predicates)
{
handlers.Add(new PredicateStatsHandler(this._literals));
}
if (this._objects)
{
handlers.Add(new ObjectStatsHandler(this._literals));
}
}
if (this._nodes)
{
handlers.Add(new NodeStatsHandler());
}
bool ok = true;
IRdfHandler handler;
if (handlers.Count == 1)
{
handler = handlers[0];
}
else
{
handler = new MultiHandler(handlers.OfType <IRdfHandler>());
}
Stopwatch timer = new Stopwatch();
timer.Start();
for (int i = 0; i < this._inputs.Count; i++)
{
Console.WriteLine("rdfOptStats: Processing Input " + (i + 1) + " of " + this._inputs.Count + " - '" + this._inputs[i] + "'");
try
{
FileLoader.Load(handler, this._inputs[i]);
}
catch (RdfParserSelectionException selEx)
{
ok = false;
Console.Error.WriteLine("rdfOptStats: Error: Unable to select a Parser to read input");
break;
}
catch (RdfParseException parseEx)
{
ok = false;
Console.Error.WriteLine("rdfOptStats: Error: Parsing Error while reading input");
break;
}
catch (RdfException parseEx)
{
ok = false;
Console.Error.WriteLine("rdfOptStats: Error: RDF Error while reading input");
break;
}
catch (Exception ex)
{
ok = false;
Console.Error.WriteLine("rdfOptStats: Error: Unexpected Error while reading input");
break;
}
}
Console.WriteLine("rdfOptStats: Finished Processing Inputs");
timer.Stop();
Console.WriteLine("rdfOptStats: Took " + timer.Elapsed + " to process inputs");
timer.Reset();
if (ok)
{
//Output the Stats
timer.Start();
Graph g = new Graph();
g.NamespaceMap.Import(handlers.First().Namespaces);
try
{
foreach (BaseStatsHandler h in handlers)
{
h.GetStats(g);
}
IRdfWriter writer = MimeTypesHelper.GetWriter(MimeTypesHelper.GetMimeTypes(Path.GetExtension(this._file)));
if (writer is ICompressingWriter)
{
((ICompressingWriter)writer).CompressionLevel = WriterCompressionLevel.High;
}
if (writer is IHighSpeedWriter)
{
((IHighSpeedWriter)writer).HighSpeedModePermitted = false;
}
writer.Save(g, this._file);
Console.WriteLine("rdfOptStats: Statistics output to " + this._file);
timer.Stop();
Console.WriteLine("rdfOptStats: Took " + timer.Elapsed + " to output statistics");
}
catch (Exception ex)
{
Console.Error.WriteLine("rdfOptStats: Error: Unexpected error outputting statistics to " + this._file);
Console.Error.WriteLine(ex.Message);
Console.Error.WriteLine(ex.StackTrace);
}
}
else
{
Console.Error.WriteLine("rdfOptStats: Error: Unable to output statistics due to errors during input processing");
}
}
}
public BrightstarSparqlResultsType ExecuteSparql(SparqlQuery query, IStore store, TextWriter resultsWriter)
{
try
{
EnsureValidResultFormat(query);
var dataset = MakeDataset(store);
if (_defaultGraphUris != null)
{
dataset.SetDefaultGraph(_defaultGraphUris);
}
var queryProcessor = new BrightstarQueryProcessor(store, dataset);
var queryResult = queryProcessor.ProcessQuery(query);
if (queryResult is SparqlResultSet)
{
var sparqlResultSet = (SparqlResultSet)queryResult;
ISparqlResultsWriter sparqlResultsWriter = null;
if (_sparqlResultsFormat != null)
{
sparqlResultsWriter =
MimeTypesHelper.GetSparqlWriter(new string[] { _sparqlResultsFormat.ToString() });
}
if (sparqlResultsWriter == null)
{
throw new NoAcceptableFormatException(typeof(SparqlResultsFormat),
"No acceptable format provided for writing a SPARQL result set.");
}
sparqlResultsWriter.Save(sparqlResultSet, resultsWriter);
switch (sparqlResultSet.ResultsType)
{
case SparqlResultsType.Boolean:
return(BrightstarSparqlResultsType.Boolean);
case SparqlResultsType.VariableBindings:
return(BrightstarSparqlResultsType.VariableBindings);
default:
throw new BrightstarInternalException("Unrecognized SPARQL result type");
}
}
if (queryResult is IGraph)
{
var g = (IGraph)queryResult;
var rdfWriter = _rdfFormat == null
? null
: MimeTypesHelper.GetWriter(new string[] { _rdfFormat.ToString() });
if (rdfWriter == null)
{
throw new NoAcceptableFormatException(typeof(RdfFormat),
"No acceptable format provided for writing an RDF graph result.");
}
rdfWriter.Save(g, resultsWriter);
try
{
resultsWriter.Flush();
}
catch (ObjectDisposedException)
{
// resultWriter is already closed
}
return(BrightstarSparqlResultsType.Graph);
}
throw new BrightstarInternalException(
String.Format("Unexpected return type from QueryProcessor.ProcessQuery: {0}",
queryResult.GetType()));
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.SparqlExecutionError,
"Error Executing query {0}. Cause: {1}",
query.ToString(), ex);
throw;
}
}
// See https://github.com/dotnetrdf/dotnetrdf/blob/5b7fc480346c90eb9b164fb4f8ee09f378442d52/Libraries/dotNetRDF.Web/HandlerHelper.cs#L157
/// <summary>
/// Helper function which returns the Results (Graph/Triple Store/SPARQL Results) back to the Client in one of their accepted formats
/// </summary>
/// <param name="context">Context of the HTTP Request</param>
/// <param name="result">Results of the Sparql Query</param>
/// <param name="config">Handler Configuration</param>
public static void SendToClient(HttpContext context, SparqlQueryResult result)
{
MimeTypeDefinition definition = null;
const string TEXT_PLAIN = "text/plain";
var acceptTypes = context.Request.Headers[HeaderNames.Accept];
// Return the Results
if (result.SparqlResultSet != null)
{
ISparqlResultsWriter sparqlWriter = null;
// Try and get a MIME Type Definition using the HTTP Requests Accept Header
if (acceptTypes.Count > 0)
{
definition = MimeTypesHelper.GetDefinitions((IEnumerable <string>)acceptTypes).FirstOrDefault(d => d.CanWriteSparqlResults);
}
// Try and get the registered Definition for SPARQL Results XML
if (definition == null)
{
definition = MimeTypesHelper.GetDefinitions(MimeTypesHelper.SparqlResultsXml[0]).FirstOrDefault();
}
// If Definition is still null create a temporary definition
if (definition == null)
{
definition = new MimeTypeDefinition("SPARQL Results XML", MimeTypesHelper.SparqlResultsXml, Enumerable.Empty <String>());
definition.SparqlResultsWriterType = typeof(VDS.RDF.Writing.SparqlXmlWriter);
}
// Set up the Writer appropriately
sparqlWriter = definition.GetSparqlResultsWriter();
context.Response.ContentType = definition.CanonicalMimeType;
// HandlerHelper.ApplyWriterOptions(sparqlWriter, config);
// Send Result Set to Client
context.Response.Headers[HeaderNames.ContentEncoding] = definition.Encoding.WebName;
sparqlWriter.Save(result.SparqlResultSet, new StreamWriter(context.Response.Body, definition.Encoding));
}
else if (result.Graph != null)
{
IRdfWriter rdfWriter = null;
var ctype = TEXT_PLAIN;
// Try and get a MIME Type Definition using the HTTP Requests Accept Header
if (acceptTypes.Count > 0)
{
definition = MimeTypesHelper.GetDefinitions((IEnumerable <string>)acceptTypes).FirstOrDefault(d => d.CanWriteRdf);
}
if (definition == null)
{
// If no appropriate definition then use the GetWriter method instead
rdfWriter = MimeTypesHelper.GetWriter((IEnumerable <string>)acceptTypes, out ctype);
}
else
{
rdfWriter = definition.GetRdfWriter();
}
// Setup the writer
if (definition != null)
{
ctype = definition.CanonicalMimeType;
}
context.Response.ContentType = ctype;
//HandlerHelper.ApplyWriterOptions(rdfWriter, config);
// Clear any existing Response
//context.Response.Clear();
// Send Graph to Client
if (definition != null)
{
context.Response.Headers[HeaderNames.ContentEncoding] = definition.Encoding.WebName;
rdfWriter.Save(result.Graph, new StreamWriter(context.Response.Body, definition.Encoding));
}
else
{
rdfWriter.Save(result.Graph, new StreamWriter(context.Response.Body));
}
}
else
{
Debug.Assert(result == SparqlQueryResult.Null);
}
}
private void mnuSaveConnection_Click(object sender, EventArgs e)
{
if (this.ActiveMdiChild != null)
{
if (this.ActiveMdiChild is StoreManagerForm)
{
Object manager;
if (this.ActiveMdiChild is StoreManagerForm)
{
manager = ((StoreManagerForm)this.ActiveMdiChild).Manager;
}
else
{
return;
}
if (manager is IConfigurationSerializable)
{
this.sfdConnection.Filter = MimeTypesHelper.GetFilenameFilter(true, false, false, false, false, false);
if (this.sfdConnection.ShowDialog() == DialogResult.OK)
{
//Append to existing configuration file or overwrite?
ConfigurationSerializationContext context;
if (File.Exists(this.sfdConnection.FileName))
{
DialogResult result = MessageBox.Show("The selected connection file already exists - would you like to append this connection to that file? Click Yes to append to this file, No to overwrite and Cancel to abort", "Append Connection?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
switch (result)
{
case DialogResult.Yes:
Graph g = new Graph();
FileLoader.Load(g, this.sfdConnection.FileName);
context = new ConfigurationSerializationContext(g);
break;
case DialogResult.No:
context = new ConfigurationSerializationContext();
break;
default:
return;
}
}
else
{
//Create new configuration file
context = new ConfigurationSerializationContext();
}
//Save the Connection
((IConfigurationSerializable)manager).SerializeConfiguration(context);
try
{
IRdfWriter writer = MimeTypesHelper.GetWriter(MimeTypesHelper.GetMimeType(Path.GetExtension(this.sfdConnection.FileName)));
writer.Save(context.Graph, this.sfdConnection.FileName);
}
catch (RdfWriterSelectionException)
{
CompressingTurtleWriter ttlwriter = new CompressingTurtleWriter(WriterCompressionLevel.High);
ttlwriter.Save(context.Graph, this.sfdConnection.FileName);
}
}
}
else
{
MessageBox.Show("Unable to save the current connection as it does not support this feature", "Save Unavailable", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
else
{
this.mnuSaveConnection.Enabled = false;
}
}
else
{
this.mnuSaveConnection.Enabled = false;
}
}
private bool SetOptions(String[] args)
{
if (args.Length == 0 || (args.Length == 1 && args[0].Equals("-help")))
{
this.ShowUsage();
return(false);
}
//Look through the arguments to see what we've been asked to do
foreach (String arg in args)
{
if (arg.StartsWith("-uri:"))
{
this._inputs.Add(arg);
}
else if (arg.StartsWith("-hs"))
{
if (arg.Contains(':'))
{
bool hs;
if (Boolean.TryParse(arg.Substring(arg.IndexOf(':') + 1), out hs))
{
this._options.Add(new HighSpeedOption(hs));
}
else
{
this._options.Add(new HighSpeedOption(true));
}
}
else
{
this._options.Add(new HighSpeedOption(true));
}
}
else if (arg.StartsWith("-pp"))
{
if (arg.Contains(':'))
{
bool pp;
if (Boolean.TryParse(arg.Substring(arg.IndexOf(':') + 1), out pp))
{
this._options.Add(new PrettyPrintingOption(pp));
}
else
{
this._options.Add(new PrettyPrintingOption(true));
}
}
else
{
this._options.Add(new PrettyPrintingOption(true));
}
}
else if (arg.StartsWith("-c"))
{
if (arg.Contains(':'))
{
int c;
if (Int32.TryParse(arg.Substring(arg.IndexOf(':') + 1), out c))
{
this._options.Add(new CompressionLevelOption(c));
}
else
{
this._options.Add(new CompressionLevelOption(WriterCompressionLevel.Default));
}
}
else
{
this._options.Add(new CompressionLevelOption(WriterCompressionLevel.Default));
}
}
else if (arg.StartsWith("-stylesheet:"))
{
String stylesheet = arg.Substring(arg.IndexOf(':') + 1);
this._options.Add(new StylesheetOption(stylesheet));
}
else if (arg.Equals("-merge"))
{
this._merge = true;
}
else if (arg.Equals("-overwrite"))
{
this._overwrite = true;
}
else if (arg.Equals("-dataset"))
{
this._dataset = true;
this._merge = true;
}
else if (arg.StartsWith("-out:") || arg.StartsWith("-output:"))
{
this._output = arg.Substring(arg.IndexOf(':') + 1);
//If the Writers have not been set then we'll set them now
if (this._writer == null && this._storeWriter == null)
{
String format;
try
{
format = MimeTypesHelper.GetMimeType(Path.GetExtension(this._output));
}
catch (RdfException)
{
Console.Error.WriteLine("rdfConvert: The File Extension '" + Path.GetExtension(this._output) + "' is not permissible since dotNetRDF cannot infer a MIME type from the extension");
return(false);
}
try
{
this._writer = MimeTypesHelper.GetWriter(format);
}
catch (RdfException)
{
//Supress this error
}
try
{
this._storeWriter = MimeTypesHelper.GetStoreWriter(format);
if (this._writer == null)
{
this._merge = true;
}
else if (this._writer is NTriplesWriter && !Path.GetExtension(this._output).Equals(".nt"))
{
this._writer = null;
this._merge = true;
}
}
catch (RdfException)
{
//Suppress this error
}
if (this._writer == null && this._storeWriter == null)
{
Console.Error.WriteLine("rdfConvert: The MIME Type '" + format + "' is not permissible since dotNetRDF does not support outputting in that format");
return(false);
}
}
}
else if (arg.StartsWith("-outformat:"))
{
String format = arg.Substring(arg.IndexOf(':') + 1);
if (!format.Contains("/"))
{
try
{
format = MimeTypesHelper.GetMimeType(format);
}
catch (RdfException)
{
Console.Error.WriteLine("rdfConvert: The File Extension '" + format + "' is not permissible since dotNetRDF cannot infer a MIME type from the extension");
return(false);
}
}
//Validate the MIME Type
if (!IsValidMimeType(format))
{
Console.Error.WriteLine("rdfConvert: The MIME Type '" + format + "' is not permissible since dotNetRDF does not support outputting in that format");
return(false);
}
try
{
this._writer = MimeTypesHelper.GetWriter(format);
this._outExt = MimeTypesHelper.GetFileExtension(this._writer);
}
catch (RdfException)
{
//Supress this error
}
try
{
this._storeWriter = MimeTypesHelper.GetStoreWriter(format);
if (this._writer == null)
{
//In the event that we can't get a valid Writer then individual graphs
//will be put into a Store and output as a Dataset
this._merge = true;
this._outExt = MimeTypesHelper.GetFileExtension(this._storeWriter);
}
else if (this._writer is NTriplesWriter && (!format.Equals("nt") || !format.Equals(".nt") || !format.Equals("text/plain")))
{
this._writer = null;
this._merge = true;
this._outExt = MimeTypesHelper.GetFileExtension(this._storeWriter);
}
}
catch (RdfException)
{
//Suppress this error
}
if (this._writer == null && this._storeWriter == null)
{
Console.Error.WriteLine("rdfConvert: The MIME Type '" + format + "' is not permissible since dotNetRDF does not support outputting in that format");
return(false);
}
}
else if (arg.StartsWith("-outext:"))
{
this._outExt = arg.Substring(arg.IndexOf(':') + 1);
if (!this._outExt.StartsWith("."))
{
this._outExt = "." + this._outExt;
}
}
else if (arg.Equals("-debug"))
{
this._debug = true;
}
else if (arg.Equals("-help"))
{
//Ignore help argument if other arguments are present
}
else if (arg.Equals("-nocache"))
{
Options.UriLoaderCaching = false;
}
else if (arg.Equals("-nobom"))
{
Options.UseBomForUtf8 = false;
}
else if (arg.Equals("-warnings"))
{
this._warnings = true;
UriLoader.Warning += this.ShowWarning;
UriLoader.StoreWarning += this.ShowWarning;
FileLoader.Warning += this.ShowWarning;
FileLoader.StoreWarning += this.ShowWarning;
}
else
{
//Anything else is treated as an input file
this._inputs.Add(arg);
}
}
//If there are no this._inputs then we'll abort
if (this._inputs.Count == 0)
{
Console.Error.WriteLine("rdfConvert: No Inputs were provided - please provide one/more files or URIs you wish to convert");
return(false);
}
//If there are no writers specified then we'll abort
if (this._writer == null && this._storeWriter == null)
{
Console.Error.WriteLine("rdfConvert: Aborting since no output options have been specified, use the -out:filename or -outformat: arguments to specify output format");
return(false);
}
if (!this._outExt.Equals(String.Empty))
{
if (!this._outExt.StartsWith("."))
{
this._outExt = "." + this._outExt;
}
}
else if (!this._output.Equals(String.Empty))
{
this._outExt = Path.GetExtension(this._output);
}
//Apply the Options to the Writers
foreach (IConversionOption option in this._options)
{
if (this._writer != null)
{
option.Apply(this._writer);
}
if (this._storeWriter != null)
{
option.Apply(this._storeWriter);
}
}
return(true);
}
