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73 lines
2.3 KiB
EmacsLisp
73 lines
2.3 KiB
EmacsLisp
;;; spam-wash.el --- wash spam before analysis
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;; Copyright (C) 2004, 2007-2019 Free Software Foundation, Inc.
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;; Author: Andrew Cohen <cohen@andy.bu.edu>
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;; Keywords: mail
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This library decodes MIME encodings such as base64 and
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;; quoted-printable to allow for better spam analysis.
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;;
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;; `spam-wash' should be called in a buffer containing the message.
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;;; Code:
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(require 'gnus-art)
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(defun spam-wash ()
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"Treat the current buffer prior to spam analysis."
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(interactive)
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(run-hooks 'gnus-article-decode-hook)
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(save-excursion
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(save-restriction
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(let* ((buffer-read-only nil)
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(gnus-inhibit-treatment t)
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(gnus-article-buffer (current-buffer))
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(handles (or (mm-dissect-buffer nil gnus-article-loose-mime)
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(and gnus-article-emulate-mime
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(mm-uu-dissect))))
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handle)
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(when gnus-article-mime-handles
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(mm-destroy-parts gnus-article-mime-handles)
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(setq gnus-article-mime-handle-alist nil))
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(setq gnus-article-mime-handles handles)
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(when (and handles
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(or (not (stringp (car handles)))
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(cdr handles)))
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(article-goto-body)
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(delete-region (point) (point-max))
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(spam-treat-parts handles))))))
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(defun spam-treat-parts (handle)
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(if (stringp (car handle))
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(mapcar 'spam-treat-parts (cdr handle))
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(if (bufferp (car handle))
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(save-restriction
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(narrow-to-region (point) (point))
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(when (let ((case-fold-search t))
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(string-match "text" (car (mm-handle-type handle))))
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(mm-insert-part handle))
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(goto-char (point-max)))
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(mapcar 'spam-treat-parts handle))))
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(provide 'spam-wash)
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;;; spam-wash.el ends here
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