Always stop the server when exiting serve()

Closes #264

Author: bcb

jsonrpcserver/server.py

@@ -25,4 +25,11 @@ def do_POST(self) -> None:  # pylint: disable=invalid-name
 def serve(name: str = "", port: int = 5000) -> None:
     """A simple function to serve HTTP requests"""
     logging.info(" * Listening on port %s", port)
-    HTTPServer((name, port), RequestHandler).serve_forever()
+    try:
+        httpd = HTTPServer((name, port), RequestHandler)
+        httpd.serve_forever()
+    except KeyboardInterrupt:
+        pass
+    except Exception:
+        httpd.shutdown()
+        raise