---
name: "HTML::FormFu::Constraint::File"
section: "3pm"
platform: "linux"
package: "libhtml-formfu-perl"
version: "2.07000-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/HTML::FormFu::Constraint::File"
---

# HTML::FormFu::Constraint::File(3pm)

File Upload Constraint

## NAME

HTML::FormFu::Constraint::File - File Upload Constraint

## VERSION

version 2.07

## DESCRIPTION

Ensure the submitted value is a file upload.

This Constraint is not needed if you use any of the `"File::*"` Constraints, as they all make the same check as this Constraint does.

## LIMITATIONS

This can only verify that your CGI backend (CGI, Catalyst, CGI::Simple) thinks it was a file upload. If the user submits a filename which doesn't exist on their system, you will probably get a valid HTML::FormFu::Upload object, with a valid filehandle, but no Content-Length. This Constraint would still see this as a valid uploaded file - if you want to ensure that you get a file with content, instead use HTML::FormFu::Constraint::File::Size with min set to `1`.

## SEE ALSO

Is a sub-class of, and inherits methods from HTML::FormFu::Constraint

HTML::FormFu

## AUTHOR

Carl Franks, `"cfranks@cpan.org"`

## LICENSE

This library is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

## AUTHOR

Carl Franks \<cpan@fireartist.com\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Carl Franks.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.