add custom handler

handler.py

@@ -55,14 +55,17 @@ class EndpointHandler():
 
     def __call__(self, data: Dict[str, Any]) -> str:
         # get inputs 
-        tmp_data = data.pop("inputs", data)
+        data = data.pop("inputs", data)
+        data = data.decode('utf-8')
+        data = json.loads(data)
+        
         batch_size = data.pop("batch_size", 1)
 
-        context = base64.b64decode(tmp_data[0])
+        context = base64.b64decode(data["context_b64str"])
         context = np.frombuffer(context, dtype="float32")
         context = np.reshape(context, (batch_size, 77, 768))
 
-        unconditional_context = base64.b64decode(tmp_data[1])
+        unconditional_context = base64.b64decode(data['unconditional_context_b64str'])
         unconditional_context = np.frombuffer(unconditional_context, dtype="float32")
         unconditional_context = np.reshape(unconditional_context, (batch_size, 77, 768))