Can a servlet determine if the posted data is multipart/form-data?

Question

I have a servlet that is used for many different actions, used in the Front Controller pattern. Does anyone know if it is possible to tell if the data posted back to it is enctype="multipart/form-data"? I can't read the request parameters until I decide this, so I can't dispatch the request to the proper controller.

Any ideas?

Answer 1

If you are going to try using the request.getContentType() method presented above, be aware that:

1. request.getContentType() may return null.
2. request.getContentType() may not be equal to "multipart/form-data", but may just start with it.

With this in mind, the check you should run is :

if (request.getContentType() != null && request.getContentType().toLowerCase().indexOf("multipart/form-data") > -1 ) {
// Multipart logic here
}