--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/service/rfid_pn532/graphserver.py	Sun Apr 21 03:28:21 2019 -0700
@@ -0,0 +1,34 @@
+import sys, datetime, cyclone.web, json
+from twisted.internet import reactor, task
+from rdflib import Namespace, Literal, ConjunctiveGraph
+import rdflib_jsonld.parser
+from patchablegraph import PatchableGraph, CycloneGraphEventsHandler, CycloneGraphHandler
+
+class CurrentGraph(cyclone.web.RequestHandler):
+    def put(self):
+        g = ConjunctiveGraph()
+        rdflib_jsonld.parser.to_rdf(json.loads(self.request.body), g)
+        self.settings.masterGraph.setToGraph(g)
+
+def main():
+    from twisted.python import log as twlog
+    twlog.startLogging(sys.stderr)
+    masterGraph = PatchableGraph()
+
+    class Application(cyclone.web.Application):
+        def __init__(self):
+            handlers = [
+                (r"/()", cyclone.web.StaticFileHandler,
+                 {"path": ".", "default_filename": "index.html"}),
+                (r'/graph', CycloneGraphHandler, {'masterGraph': masterGraph}),   
+                (r'/graph/events', CycloneGraphEventsHandler, {'masterGraph': masterGraph}),
+                (r'/currentGraph', CurrentGraph),
+            ]
+            cyclone.web.Application.__init__(self, handlers,
+                                             masterGraph=masterGraph)
+
+    reactor.listenTCP(10012, Application())
+    reactor.run()
+
+if __name__ == '__main__':
+    main()