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Bucket CORS configuration ¶

Cross Origin Resource Sharing (CORS) enables client web applications in onedomain to access resources in another domain. An S3 bucket can be configuredto enable cross-origin requests. The configuration defines rules that specifythe allowed origins, HTTP methods (GET, PUT, etc.), and other elements.

Retrieve a bucket CORS configuration¶

Retrieve a bucket’s CORS configuration by calling the AWS SDK for Pythonget_bucket_cors method.

importloggingimportboto3frombotocore.exceptionsimportClientErrordefget_bucket_cors(bucket_name):"""Retrieve the CORS configuration rules of an Amazon S3 bucket    :param bucket_name: string    :return: List of the bucket's CORS configuration rules. If no CORS    configuration exists, return empty list. If error, return None.    """# Retrieve the CORS configurations3=boto3.client('s3')try:response=s3.get_bucket_cors(Bucket=bucket_name)exceptClientErrorase:ife.response['Error']['Code']=='NoSuchCORSConfiguration':return[]else:# AllAccessDisabled error == bucket not foundlogging.error(e)returnNonereturnresponse['CORSRules']

Set a bucket CORS configuration¶

A bucket’s CORS configuration can be set by calling theput_bucket_corsmethod.

# Define the configuration rulescors_configuration={'CORSRules':[{'AllowedHeaders':['Authorization'],'AllowedMethods':['GET','PUT'],'AllowedOrigins':['*'],'ExposeHeaders':['ETag','x-amz-request-id'],'MaxAgeSeconds':3000}]}# Set the CORS configurations3=boto3.client('s3')s3.put_bucket_cors(Bucket='amzn-s3-demo-bucket',CORSConfiguration=cors_configuration)

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Bucket CORS configuration
- Retrieve a bucket CORS configuration
- Set a bucket CORS configuration

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Bucket CORS configuration¶

Retrieve a bucket CORS configuration¶

Set a bucket CORS configuration¶

Bucket CORS configuration ¶