rfc2388

This package contains an implementation of RFC 2388, which is used to
process form data posted with HTTP POST method using enctype
"multipart/form-data".

The main functions of interest are PARSE-MIME and PARSE-HEADER.

Use PARSE-MIME to parse MIME content. It can be given either a string
or a stream. It returns a list of MIME parts. The second argument must
be a boundary, which is a string that seperates MIME parts. See below
how to obtain it.

PARSE-HEADER is used by PARSE-MIME internally, but you can use it to
parse headers yourself. For instance, when data is posted to server
using POST method, a header describing the content type is sent as
well. Usually its content is application/x-www-form-urlencoded or
something similar. But users may set it to multipart/form-data, with
additional parameter named "boundary". This is how one would usually
parse the posted data:

```lisp
(let* ((header (parse-header <request-content-type> :value))
       (boundary (or (assoc "boundary" (header-parameters header)
                            :test #'string-equal)
                     (error "Form data is missing a boundary: ~S"
                            <request-content-type>))))
  (parse-mime <request-posted-content> boundary))
```
      
The :VALUE keyword parameter to PARSE-HEADER means that parsing should
begin with header value, not name (because header name is
"content-type" and the web server has already seperated them, at least
in this scenario).



Contains an implementation of RFC 2388, which is used to process form data
posted with HTTP POST method using enctype "multipart/form-data".

rfc2388

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