mod_form is an example module that modifies or unsets form data pairs according to rules that are configured.

Dependencies

• mod_request
• IHS 9.0 and above / Apache 2.4.x and above

Building the module

The module can be built using apxs like so:

/path/to/bin/apxs -ci src/mod_form.c

Module directives

• FormData unset <name-regex> unsets all form pairs that match the regex name-regex.
• FormData edit <name> <pattern> <substitution> replaces the value of the form pair name with the value of substitution if the value matches the regex provided in pattern.

Examples

Unsetting all pairs starting with unset_

LoadModule request_module modules/mod_request.so
LoadModule form_module modules/mod_form.so

<Location />
  KeptBodySize 2048
  FormData unset unset_.*
</Location>

Editing usernames to remove the prefix admin_

LoadModule request_module modules/mod_request.so
LoadModule form_module modules/mod_form.so

<Location />
  KeptBodySize 2048
  FormData edit username ^admin_(.*) $1
</Location>