boto3 cognito : set_ui_customization call not working.

I am trying to upload logo file for custom UI for Hosted Domain. Below is my source code.

def readImage():
        with open("./utils/png-file-6-1.png", "rb") as image:
            f = image.read()
            b = bytearray(f)
            return b

def set_ui_customization():
        bytes_a = readImage()
        client = boto3.client('cognito-idp', region_name=self.region_name)
        response = client.set_ui_customization(
            UserPoolId='abc',
            ClientId='pqr',
            #CSS='string',
            ImageFile=bytes_a
            )
        print('done')
        print(response)

Its giving error :

Traceback (most recent call last): File “/var/task/verify.py”, line 28, in lambda_handler cognito.set_ui_customization(‘abc’, ‘pqr’) File “/var/task/utils/cognitoUtils.py”, line 320, in set_ui_customization response = client.set_ui_customization( File “/var/runtime/botocore/client.py”, line 272, in _api_call return self._make_api_call(operation_name, kwargs) File “/var/runtime/botocore/client.py”, line 576, in _make_api_call raise error_class(parsed_response, operation_name) botocore.errorfactory.InvalidParameterException: An error occurred (InvalidParameterException) when calling the SetUICustomization operation: The uploaded image must be a valid .jpeg or .png file.

1. The provided file is working from AWS console UI, but not from boto3 functions.
2. Do you have any sample code for how to provide “ImageFile”. Documentation just says Uploaded image file which is not sufficient.

@swetashre : Could you please help on this.

[gdhananjay]

@vlakken ,

For cli please give image file argument like, --image-file fileb://./Logo.png Please refer : https://stackoverflow.com/questions/50692326/invalid-png-format-in-set-ui-customization-in-aws-cognito

[gdhananjay]

@swetashre ,

Thanks for the reply, Problem was with my image file, I changed it and it started working.