diff --git a/net/cm/cmfile.py b/net/cm/cmfile.py
new file mode 100644
index 0000000..6d56efd
--- /dev/null
+++ b/net/cm/cmfile.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+__author__ = 'ty'
+
+import json
+
+class CMFile:
+    url = ""
+    sha1 = ""
+
+    def __init__(self):
+        pass
+
+    def json(self):
+        return json.dumps(self, default=lambda o: o.__dict__, ensure_ascii=False, sort_keys=True)