AWS: how to fix S3 event replacing space with '+' sign in object key names in json

Question

I have a lamba function to copy objects from bucket 'A' to bucket 'B', and everything was working fine, until and object with name 'New Text Document.txt' was created in bucket 'A', the json that gets built in S3 event, key as "key": "New+Text+Document.txt".

the spaces got replaced with '+'. I know it is a known issue by seraching on web. But I am not sure how to fix this and the incoming json itself has a '+' and '+' can be actually in the name of the file. like 'New+Text Document.txt'.

So I cannot blindly have logic to space '+' by ' ' in my lambda function.

Due to this issue, when code tries to find the file in bucket it fails to find it.

Please suggest.

Answer 1

I came across this looking for a solution for a lambda written in python instead of java; "urllib.parse.unquote_plus" worked for me, it properly handled a file with both spaces and + signs:

from urllib.parse import unquote_plus import boto3   bucket = 'testBucket1234' # uploaded file with name 'foo + bar.txt' for test, s3 Put event passes following encoded object_key object_key = 'foo %2B bar.txt' print(object_key) object_key = unquote_plus(object_key) print(object_key)  client = boto3.client('s3') client.get_object(Bucket=bucket, Key=object_key)