CGI::Fast
is a subclass of the CGI object created by CGI.pm
.
Therefore, you can use the features in CGI, namely Avoiding DOS Attacks
:
$CGI::POST_MAX
If set to a non-negative integer, this variable puts a ceiling on the size of POSTings, in bytes. If CGI.pm detects a POST that is greater than the ceiling, it will immediately exit with an error message. This value will affect both ordinary POSTs and multipart POSTs, meaning that it limits the maximum size of file uploads as well. You should set this to a reasonably high value, such as 1 megabyte.
$CGI::DISABLE_UPLOADS
If set to a non-zero value, this will disable file uploads completely. Other fill-out form values will work as usual.