We have a Silverstripe website where the admins can create online forms using the userform module.
To allow a file to be uploaded via the form the admin add a "File Upload Field" to the form. This adds a Filefield to the form.
The Filefield is a simplified version of UploadField which allows a number of validation options, including maximum upload file size.
Do these options exist for Filefield?
My issue is I need to keep the global PHP upload_max_filesize and post_max_size high for backend CMS functionality but I want to limit the front end Filefield uploads to 8meg.
Is it possible to validate Filefield in the userform module so it fails/ displays a message if the file is over a certain size that is small than the PHP variables?
Doesn't look like there's built in functionality for it. The documentation states the file size is limited by the webserver [1].
However, FileField uses the Upload class' validate() function which in its turn uses the Upload_Validator class' validate() function [2] which checks for a max file size in the Config.
This means you can add the following to your config file to restrict file size:
# Don't forget to flush afterwards :-)
Upload_Validator:
default_max_file_size: '1m' # 1 megabyte
Please take note that this is a default setting, which means it probably affects all other UploadFields as well. You can however set a limit on the other UploadFields that need to handle larger files.
[2] https://github.com/silverstripe/silverstripe-framework/blob/master/filesystem/Upload.php#L536