we should pass the file content instead of the path to libnetworkcachee

src/zc/buildout/networkcache.py

@@ -119,8 +119,14 @@ def upload_network_cached(network_cache, external_url, path, logger):
         return False
 
     try:
+        f = open(path, 'r')
+        try:
+          file_content = f.read()
+        finally:
+          f.close()
+
         nc = NetworkcacheClient(network_cache)
-        result = nc.put(path)
+        result = nc.put(file_content)
         if result.status == 200:
             _update_network_cached_log(path, external_url)