Merge pull request #1678 from skhrapko-amplify/python_handle_base64_e…

…ncoded_binary_response_from_aws_lambda_function

Python handle base64 encoded binary response from aws lambda function

src/lambda/handler-runner/python-runner/invoke.py

@@ -1,6 +1,7 @@
 # copy/pasted entirely as is from:
 # https://github.com/serverless/serverless/blob/v1.50.0/lib/plugins/aws/invokeLocal/invoke.py
 
+import base64
 import subprocess
 import argparse
 import json
@@ -10,6 +11,7 @@
 from time import strftime, time
 from importlib import import_module
 
+
 class FakeLambdaContext(object):
     def __init__(self, name='Fake', version='LATEST', timeout=6, **kwargs):
         self.name = name
@@ -102,5 +104,9 @@ def log(self):
             '__offline_payload__': result
         }
 
+        if isinstance(result['body'], bytes):
+            data['__offline_payload__']['body'] = base64.b64encode(result['body']).decode('utf-8')
+            data['isBase64Encoded'] = True
+
         sys.stdout.write(json.dumps(data))
         sys.stdout.write('\n')