/// <summary>
/// Processes a POST operation
/// </summary>
/// <param name="context">HTTP Context</param>
public override void ProcessPost(IHttpContext context)
{
// Get the payload assuming there is one
IGraph g = ParsePayload(context);
if (g == null)
{
// Q: What should the behaviour be when the payload is null for a POST? Assuming a 200 OK response
return;
}
// Get the Graph URI of the Graph to be added
Uri graphUri = ResolveGraphUri(context, g);
// First we need a
// Generate an INSERT DATA command for the POST
StringBuilder insert = new StringBuilder();
if (graphUri != null)
{
insert.AppendLine("INSERT DATA { GRAPH @graph {");
}
else
{
insert.AppendLine("INSERT DATA {");
}
TurtleFormatter formatter = new TurtleFormatter(g.NamespaceMap);
foreach (Triple t in g.Triples)
{
insert.AppendLine(t.ToString(formatter));
}
if (graphUri != null)
{
insert.AppendLine("} }");
}
else
{
insert.AppendLine("}");
}
// Parse and evaluate the command
SparqlParameterizedString insertCmd = new SparqlParameterizedString(insert.ToString());
insertCmd.Namespaces = g.NamespaceMap;
if (graphUri != null)
{
insertCmd.SetUri("graph", graphUri);
}
SparqlUpdateCommandSet cmds = _parser.ParseFromString(insertCmd);
_updateProcessor.ProcessCommandSet(cmds);
_updateProcessor.Flush();
}
