Writing json to AWS S3 from AWS Lambda

Question

I am trying to write a response to AWS S3 as a new file each time.

Below is the code I am using

s3 = boto3.resource('s3', region_name=region_name)
s3_obj = s3.Object(s3_bucket, f'/{folder}/{file_name}.json')
resp_ = s3_obj.put(Body=json.dumps(response_json).encode('UTF-8'))

I can see that I get a 200 response and the file on the directory as well. But it also produces the below exception :

[DEBUG] 2020-10-13T08:29:10.828Z. Event needs-retry.s3.PutObject: calling handler <bound method S3RegionRedirector.redirect_from_error of <botocore.utils.S3RegionRedirector object at 0x7f2cf2fdfe123>>

My code throws 500 Exception even though it works. I have other business logic as part of the lambda and things work just fine as the write to S3 operation is at the last. Any help would be appreciated.

Answer 1

Amazon S3 对象的密钥（文件名）不应以斜杠 ( / ) 开头。