
Call this if you want to parse the request as a multipart content.
ie: data is coming from a form with enctype="multipart/form-data"
Usually this is a file upload form.
By default it is not done automatically for performance/security reasons.
So you will want to call this method manually to parse the multipart form.
This will:
- add the multipart variables as request parameters, so you can read them with getParameter()
- uplload the files data to a temporary folder, so you can get/save the files getFileItem().xxx()