I am attempting to verify my understanding of how mime type assignment works in s3cmd. I'm hoping this post will make this detail easier to find for others seeking it too.
I looked at the S3.py code and surmised that the "python-magic" module will attempt to be used if present. If it is not present, a warning:
"WARNING: Module python-magic is not available. Guessing MIME types based on file extensions."
will be issued and s3cmd will guess the mime type for application by use of the "mimetypes" module.
As I understand, the "mimetypes" module (which seems to be a stock python module) looks to the OS for a mime type mapping file and uses that to assign mime types to files uploaded to S3.
On my AWS linux S3 uploading host, that file seems to be /etc/mime.types, which appears to be a fully fledged map file and appropriate for this use.
Is this understanding accurate?
Python 2.6.9 (unknown, Mar 28 2014, 00:06:37)
[GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import mimetypes
['/etc/mime.types', '/etc/httpd/mime.types', '/etc/httpd/conf/mime.types', '/etc/apache/mime.types', '/etc/apache2/mime.types', '/usr/local/etc/httpd/conf/mime.types', '/usr/local/lib/netscape/mime.types', '/usr/local/etc/httpd/conf/mime.types', '/usr/local/etc/mime.types']
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