Added support for downloading binary

Crx/simplenode.py

@@ -1,13 +1,25 @@
+from logging import Logger
+
 if False:
     from .connection import Connection
 
 
+LOGGER = Logger(__name__)
+
+
 class SimpleNode:
     def __init__(self, path: str, data: dict, connection: 'Connection'):
         self.path = path
         self._data = data
         self._connection = connection
 
+    def download(self, key: str = 'jcr:data') -> bytes:
+        if ':' + key not in self._data:
+            LOGGER.warning(f"Key :{key} is not present, binary probably not available")
+        # TODO value of the :{key} must be an int
+        # TODO value denotes file size, warn/deny large files?
+        return self._connection.download_binary(self.path + '/' + key)
+
     def __getitem__(self, item):
         return getattr(self, item)