Meh, you shouldn’t need a sophisticated understanding of file formats and web server configuration to make a website, so some slack is imo a good thing. Maybe not as much as there is, but reading the head of an image file doesn’t seem that big a deal.
The unsophisticated solution is to map the file extension to the MIME type, which is done by default much of the time. If you do anything else, then we need to have a conversation about how.
Which is bad and wrong. Postel’s law has been considered a bad idea by Postel himself for a while. We shouldn’t let such fuzziness go through.
Meh, you shouldn’t need a sophisticated understanding of file formats and web server configuration to make a website, so some slack is imo a good thing. Maybe not as much as there is, but reading the head of an image file doesn’t seem that big a deal.
The unsophisticated solution is to map the file extension to the MIME type, which is done by default much of the time. If you do anything else, then we need to have a conversation about how.