Well, as usual something that seemed simple at first glance is now looking somewhat complex. I'm thinking of reworking the fileUpload handling to allow a user to register either a (String, String, Array[Byte]) ⇒ Any or (String, String, InputStream) ⇒ Any function, which would then be executed during request processing. The issue is that form field processing (ParamHolders) takes place in Req, before LiftSession has been set up, and the act of parsing the request for form data, particularly for large upload streams (the target of these changes) precludes holding on to any data for later processing (the servlet container cannot be expected to hold the entire request in memory). On the other hand, users should reasonably expect that their form handling functions are stateful, so I'm trying to think of some way to meet in the middle on form processing. Ideas?
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