fix: serialize extra param with base64

Author: yanbasic

src/emd/models/utils/serialize_utils.py

@@ -1,16 +1,21 @@
 import json
 import argparse
-
-JSON_DOUBLE_QUOTE_REPLACE = '<!>'
-JSON_SINGLE_QUOTE_REPLACE = '<*>'
+import base64
 
 
 def load_extra_params(string):
-    string = string.replace(JSON_DOUBLE_QUOTE_REPLACE,'"').replace(JSON_SINGLE_QUOTE_REPLACE,"'")
     try:
-        return json.loads(string)
-    except json.JSONDecodeError:
+        # Decode the base64 string back to JSON string
+        json_bytes = base64.b64decode(string.encode('utf-8'))
+        json_str = json_bytes.decode('utf-8')
+        return json.loads(json_str)
+    except (base64.binascii.Error, UnicodeDecodeError, json.JSONDecodeError):
         raise argparse.ArgumentTypeError(f"Invalid dictionary format: {string}")
 
-def dump_extra_params(d:dict):
-    return json.dumps(d).replace("'", JSON_SINGLE_QUOTE_REPLACE).replace('"', JSON_DOUBLE_QUOTE_REPLACE)
+
+def dump_extra_params(d: dict):
+    # Convert dict to JSON string, then encode to base64
+    json_str = json.dumps(d)
+    json_bytes = json_str.encode('utf-8')
+    base64_bytes = base64.b64encode(json_bytes)
+    return base64_bytes.decode('utf-8')