Modern Python Standard Library Cookbook

There's more...

Multipart encoding is not an easy subject; for example, encoding of names within the multipart body is not an easy topic.

Over the years, it was changed and discussed multiple times about what's the proper encoding for the name of fields and name of files within the multipart content.

Historically, it's safe to only rely on plain ASCII names in those fields, so if you want to make sure the server you are submitting data to is able to properly receive your data, you might want to stick to simple filenames and fields that don't involve Unicode characters.

Over the years, multiple other ways to encode those fields and filenames were suggested. UTF-8 is one of the officially supported fallback for HTML5. The suggested recipe relies ...