Handling uploads

[mishoo]

I couldn't find any officially documented way to get uploads. After much digging, I figured out I need to (lack.request:make-request env) and then I can use (lack.request:request-parameters req). My code looks like this:

  (let* ((params (lack.request:request-parameters req))
         (file (cdr (assoc "file" params :test #'string=)))
         (token (cadr (assoc "token" params :test #'string=))))
    (destructuring-bind (input-stream params1 params2) file
      (let ((filename (gethash "filename" params1))
            (mimetype (gethash "content-type" params2)))
        (make-file filename mimetype input-stream token)))

It works, but I feel like using private APIs. The parameters appear to be an alist, associating the parameter name with a list of things; to get the value of the token, for example, I need to use (cadr (assoc "token" params)). Also, for the file I get an in-memory stream and two hashes, one containing the file name and the other containing the content-type.

My question is, is this code future-proof, or is the API supposed to change? (or is there some better API that I failed to find?)

[fukamachi]

Lack.Request is an open API.

I agree with the structure isn't understandable very much, however, it's taken from Hunchentoot's.
More useful helper function might be added, but the API (and its structure) won't be changed, I think.