feat: move mblog header handling into mime4cl

Accessing the headers of a MIME message feels like something mime4cl
should handle. We implemented this ad hoc in mblog before in order to
not need to worry about doing it in a sensible way. Now we introduce a
decent-ish interface for getting a header from a MIME message,
mime-message-header-values:

* It returns a list because MIME message headers may appear multiple
  times.

* It decodes RFC2047 only upon request, as you may want to be stricter
  about parsing certain fields.

* It checks header name equality case insensitively.

The code for decoding the RFC2047 string is retained and still uses
babel for doing the actual decoding.

Change-Id: I58bbbe4b46dbded04160b481a28a40d14775673d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5150
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
This commit is contained in:
sterni 2022-02-01 00:01:59 +01:00
parent 81c47da91c
commit 5bc73de59d
7 changed files with 43 additions and 37 deletions

View file

@ -6,6 +6,7 @@ depot.nix.buildLisp.library {
name = "mime4cl";
deps = [
depot.third_party.lisp.babel
depot.third_party.lisp.sclf
depot.third_party.lisp.npg
depot.third_party.lisp.trivial-gray-streams