Add upload and download to python server

server/utils.py

@@ -1,9 +1,14 @@
 import os
 
 ROOT = os.path.dirname(__file__)
-METADATA_FILE = os.path.join(ROOT, 'metadata.json')
 DATA_ROOT = os.path.join(os.path.dirname(__file__), 'data')
 
+METADATA_PATH4 = os.path.join(ROOT, 'metadata.json')
+API_KEY_PATH = os.path.join(ROOT, 'api_key.txt')
+
+MODIFIED_HEADER = 'modified'
+API_KEY_HEADER = 'api_key'
+
 def mkdir(path):
     if not os.path.exists(path):
         os.makedirs(path)
@@ -18,13 +23,18 @@ def read(path):
     if not os.path.exists(path):
         return None
     try:
-        with open(path) as f:
+        with open(path, 'rb') as f:
             return f.read()
-    except:
+    except Exception as e:
+        print(f"Error reading file {path}: {e}")
         return None
 
 def write(path, data):
     if not os.path.exists(path):
-        with open(path, mode='a'): pass
-    with open(path, 'w') as f:
+        with open(path, mode='ab'): pass
+
+    if isinstance(data, str):
+        data = str.encode(data)
+
+    with open(path, 'wb') as f:
         f.write(data)