How to check whether a s3 object is in ASCII text

Question

When we want to check whether a file is ASCII text file, we can use this command

    ~$ file some_file_content_unknown
    some_file_content_unknown: ASCII text

Is it possible to use file command to check a aws s3 object, something like below (but it's not working)

~$ file s3://bucketa/prefixb/some_file_content_unknown

So, something like aws s3 cp s3://example-bucket/file.name - | file - ? — Anon Coward
– Anon Coward, Commented Jan 28 at 4:05

John Rotenstein · Accepted Answer · 2025-01-28 03:22:07Z

2

The file command does not know how to access Amazon S3.

You will need to download the object first, the run file against the downloaded file.

answered Jan 28 at 3:22

John Rotenstein

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pierpy · Accepted Answer · 2025-01-28 06:34:47Z

1

As already answered file or other utilities cannot work. A solution could be to use metadata during the upload, so that it can be read with head-object without having to download the entire object first. Read docs here

answered Jan 28 at 6:34

pierpy

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