When a field has a name with non ascii characters, i think the url method is buggy when temporary urls are activated:

For instance, with a FileField with name equals to "é.txt"

• Without temporary url: https://host/v1/foo/bar/%C3%A9.txt
• With temp urls: https://host/v1/foo/bar/é.txt?temp_url_sig=8fd1e6&temp_url_expires=1561032924

To me, the guilty line is here. I should we think remove the unquote. What do you think?