Listing 3. Some Custom Filters

    SecFilterSelective REQUEST_METHOD "!^(GET|HEAD)$" chain
    SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"

    SecFilterSelective REQUEST_METHOD "^POST$" chain
    SecFilterSelective HTTP_Content-Length "^$"

    SecFilterSelective HTTP_Transfer-Encoding "!^$"
</IfModule>