public GraphsModule(IBrightstarService brightstarService,
AbstractStorePermissionsProvider storePermissionsProvider)
{
this.RequiresBrightstarStorePermission(storePermissionsProvider, get:StorePermissions.Read, put:StorePermissions.SparqlUpdate, post:StorePermissions.SparqlUpdate, delete:StorePermissions.SparqlUpdate);
Get["/{storeName}/graphs"] = parameters =>
{
if (!brightstarService.DoesStoreExist(parameters["storeName"])) return HttpStatusCode.NotFound;
Uri graphUri;
if (Request.Query["default"] == null && Request.Query["graph"] == null)
{
// Get with no default or graph parameter returns a list of graphs
// This is not part of the SPARQL 1.1 Graph Store protocol, but a useful extension
// The returned value is a SPARQL results set with a single variable named "graphUri"
// Acceptable media types are the supported SPARQL results set formats
return
Negotiate.WithModel(
new GraphListModel(brightstarService.ListNamedGraphs(parameters["storeName"])));
}
if (!TryGetGraphUri(out graphUri))
{
// Will get here if the value of the graph parameter is parsed as a relative URI
return HttpStatusCode.BadRequest;
}
try
{
// Return the serialized content of the graph
return SerializeGraph(brightstarService, parameters["storeName"], graphUri.ToString());
}
catch (BrightstarStoreNotModifiedException)
{
return HttpStatusCode.NotModified;
}
};
Put["/{storeName}/graphs"] = parameters =>
{
var storeParam = parameters["storeName"];
var store = storeParam.Value as string;
Uri graphUri;
if (!brightstarService.DoesStoreExist(store)) return HttpStatusCode.NotFound;
if (!TryGetGraphUri(out graphUri))
{
return HttpStatusCode.BadRequest;
}
var graphUriStr = graphUri.ToString();
bool isNewGraph = !graphUriStr.Equals(Constants.DefaultGraphUri) &&
!(brightstarService.ListNamedGraphs(store).Any(x => x.Equals(graphUriStr)));
try
{
var rdfFormat = GetRequestBodyFormat();
if (rdfFormat == null) return HttpStatusCode.NotAcceptable;
var rdfPayload = ParseBody(rdfFormat);
var sparqlUpdate = graphUri.ToString().Equals(Constants.DefaultGraphUri) ?
String.Format(UpdateDefaultGraph, rdfPayload) :
String.Format(UpdateNamedGraph, graphUri, rdfPayload);
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, "Update Graph " + graphUri);
return job.JobCompletedOk
? (isNewGraph ? HttpStatusCode.Created : HttpStatusCode.NoContent)
: HttpStatusCode.InternalServerError;
}
catch (RdfException)
{
return HttpStatusCode.BadRequest;
}
};
Post["/{storeName}/graphs"] = parameters =>
{
var storeParam = parameters["storeName"];
var store = storeParam.Value as string;
Uri graphUri;
if (!brightstarService.DoesStoreExist(store)) return HttpStatusCode.NotFound;
if (!TryGetGraphUri(out graphUri))
{
return HttpStatusCode.BadRequest;
}
var graphUriStr = graphUri.ToString();
var isNewGraph = !graphUriStr.Equals(Constants.DefaultGraphUri) &&
!(brightstarService.ListNamedGraphs(store).Any(x => x.Equals(graphUriStr)));
try
{
var rdfFormat = GetRequestBodyFormat();
if (rdfFormat == null) return HttpStatusCode.NotAcceptable;
var rdfPayload = ParseBody(rdfFormat);
var sparqlUpdate = graphUri.ToString().Equals(Constants.DefaultGraphUri) ?
String.Format(MergeDefaultGraph, rdfPayload) :
String.Format(MergeNamedGraph, graphUri, rdfPayload);
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, "Update Graph " + graphUri);
return job.JobCompletedOk
? (isNewGraph ? HttpStatusCode.Created : HttpStatusCode.NoContent)
: HttpStatusCode.InternalServerError;
}
catch (RdfException)
{
return HttpStatusCode.BadRequest;
}
};
Delete["{storeName}/graphs"] = parameters =>
{
Uri graphUri;
string sparqlUpdate, jobName;
var store = parameters["storeName"].Value as string;
if (!brightstarService.DoesStoreExist(store)) return HttpStatusCode.NotFound;
if (!TryGetGraphUri(out graphUri)) return HttpStatusCode.BadRequest;
if (graphUri.ToString().Equals(Constants.DefaultGraphUri))
{
// Clear the default graph
sparqlUpdate = DropDefaultGraph;
jobName = "Drop Default Graph";
}
else
{
var graphId = graphUri.ToString();
if (!brightstarService.ListNamedGraphs(store).Contains(graphId))
{
return HttpStatusCode.NotFound;
}
// Clear the named graph
sparqlUpdate = String.Format(DropNamedGraph, graphId);
jobName = "Drop Graph " + graphId;
}
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, jobName);
return job.JobCompletedOk
? HttpStatusCode.NoContent
: HttpStatusCode.InternalServerError;
};
}
public GraphsModule(IBrightstarService brightstarService,
AbstractStorePermissionsProvider storePermissionsProvider)
{
this.RequiresBrightstarStorePermission(storePermissionsProvider, get: StorePermissions.Read, put: StorePermissions.SparqlUpdate, post: StorePermissions.SparqlUpdate, delete: StorePermissions.SparqlUpdate);
Get["/{storeName}/graphs"] = parameters =>
{
if (!brightstarService.DoesStoreExist(parameters["storeName"]))
{
return(HttpStatusCode.NotFound);
}
Uri graphUri;
if (Request.Query["default"] == null && Request.Query["graph"] == null)
{
// Get with no default or graph parameter returns a list of graphs
// This is not part of the SPARQL 1.1 Graph Store protocol, but a useful extension
// The returned value is a SPARQL results set with a single variable named "graphUri"
// Acceptable media types are the supported SPARQL results set formats
return
(Negotiate.WithModel(
new GraphListModel(brightstarService.ListNamedGraphs(parameters["storeName"]))));
}
if (!TryGetGraphUri(out graphUri))
{
// Will get here if the value of the graph parameter is parsed as a relative URI
return(HttpStatusCode.BadRequest);
}
try
{
// Return the serialized content of the graph
return(SerializeGraph(brightstarService, parameters["storeName"], graphUri.ToString()));
}
catch (BrightstarStoreNotModifiedException)
{
return(HttpStatusCode.NotModified);
}
};
Put["/{storeName}/graphs"] = parameters =>
{
var storeParam = parameters["storeName"];
var store = storeParam.Value as string;
Uri graphUri;
if (!brightstarService.DoesStoreExist(store))
{
return(HttpStatusCode.NotFound);
}
if (!TryGetGraphUri(out graphUri))
{
return(HttpStatusCode.BadRequest);
}
var graphUriStr = graphUri.ToString();
bool isNewGraph = !graphUriStr.Equals(Constants.DefaultGraphUri) &&
!(brightstarService.ListNamedGraphs(store).Any(x => x.Equals(graphUriStr)));
try
{
var rdfFormat = GetRequestBodyFormat();
if (rdfFormat == null)
{
return(HttpStatusCode.NotAcceptable);
}
var rdfPayload = ParseBody(rdfFormat);
var sparqlUpdate = graphUri.ToString().Equals(Constants.DefaultGraphUri) ?
String.Format(UpdateDefaultGraph, rdfPayload) :
String.Format(UpdateNamedGraph, graphUri, rdfPayload);
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, "Update Graph " + graphUri);
return(job.JobCompletedOk
? (isNewGraph ? HttpStatusCode.Created : HttpStatusCode.NoContent)
: HttpStatusCode.InternalServerError);
}
catch (RdfException)
{
return(HttpStatusCode.BadRequest);
}
};
Post["/{storeName}/graphs"] = parameters =>
{
var storeParam = parameters["storeName"];
var store = storeParam.Value as string;
Uri graphUri;
if (!brightstarService.DoesStoreExist(store))
{
return(HttpStatusCode.NotFound);
}
if (!TryGetGraphUri(out graphUri))
{
return(HttpStatusCode.BadRequest);
}
var graphUriStr = graphUri.ToString();
var isNewGraph = !graphUriStr.Equals(Constants.DefaultGraphUri) &&
!(brightstarService.ListNamedGraphs(store).Any(x => x.Equals(graphUriStr)));
try
{
var rdfFormat = GetRequestBodyFormat();
if (rdfFormat == null)
{
return(HttpStatusCode.NotAcceptable);
}
var rdfPayload = ParseBody(rdfFormat);
var sparqlUpdate = graphUri.ToString().Equals(Constants.DefaultGraphUri) ?
String.Format(MergeDefaultGraph, rdfPayload) :
String.Format(MergeNamedGraph, graphUri, rdfPayload);
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, "Update Graph " + graphUri);
return(job.JobCompletedOk
? (isNewGraph ? HttpStatusCode.Created : HttpStatusCode.NoContent)
: HttpStatusCode.InternalServerError);
}
catch (RdfException)
{
return(HttpStatusCode.BadRequest);
}
};
Delete["{storeName}/graphs"] = parameters =>
{
Uri graphUri;
string sparqlUpdate, jobName;
var store = parameters["storeName"].Value as string;
if (!brightstarService.DoesStoreExist(store))
{
return(HttpStatusCode.NotFound);
}
if (!TryGetGraphUri(out graphUri))
{
return(HttpStatusCode.BadRequest);
}
if (graphUri.ToString().Equals(Constants.DefaultGraphUri))
{
// Clear the default graph
sparqlUpdate = DropDefaultGraph;
jobName = "Drop Default Graph";
}
else
{
var graphId = graphUri.ToString();
if (!brightstarService.ListNamedGraphs(store).Contains(graphId))
{
return(HttpStatusCode.NotFound);
}
// Clear the named graph
sparqlUpdate = String.Format(DropNamedGraph, graphId);
jobName = "Drop Graph " + graphId;
}
var job = brightstarService.ExecuteUpdate(store, sparqlUpdate, true, jobName);
return(job.JobCompletedOk
? HttpStatusCode.NoContent
: HttpStatusCode.InternalServerError);
};
}
