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Hello Franck,
It seems like you want to identify all S3 objects that do not have the 'Cache-Control' metadata set. I don't think the AWS CLI provides a direct command to filter out such objects. But you can still accomplish it with a combination of commands.
Here's a basic example using AWS CLI and Bash to find S3 objects in a given bucket that do not have the 'Cache-Control' metadata set:
#!/bin/bash bucket="your-bucket-name" # replace with your bucket name aws s3api list-objects --bucket $bucket | jq -r .Contents[].Key | while read key do cache_control=$(aws s3api head-object --bucket $bucket --key "$key" | jq -r .Metadata.\"Cache-Control\") if [ "$cache_control" = "null" ]; then echo $key fi done
In this script, we are:
- Listing all objects in a bucket using
aws s3api list-objects
. - Iterating over each object key.
- Using
aws s3api head-object
to get the metadata of each object. - Using
jq
to extract the 'Cache-Control' metadata. - Checking if 'Cache-Control' is 'null' (not set) and if so, printing out the object key.
This script will print out the keys of all objects that do not have 'Cache-Control' set.
Please note the following:
- You need to have the
jq
command-line JSON processor installed to run this script. If you don't have it, you can install it withsudo apt-get install jq
on Ubuntu orbrew install jq
on macOS. - If your bucket has a large number of objects, you should use the
--page-size
,--max-items
, and--starting-token
parameters with thelist-objects
command to retrieve the objects in smaller batches. - You will be billed for the use of the
s3api head-object
API. Consider the cost if you have a large number of objects. - If you have versioning enabled for your bucket, you should modify this script to handle object versions. The
list-objects
command does not return versions; you need to use thelist-object-versions
command instead. - Replace
"your-bucket-name"
with the actual name of your S3 bucket.
Hope this helps!
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Hello Ivan, thank you for your reply and the information provided. That's exacly what I was looking for!