| 1 | ;;; spam-wash.el --- wash spam before analysis |
| 2 | |
| 3 | ;; Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Andrew Cohen <cohen@andy.bu.edu> |
| 6 | ;; Keywords: mail |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or |
| 13 | ;; (at your option) any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | ;;; Commentary: |
| 24 | |
| 25 | ;; This library decodes MIME encodings such as base64 and |
| 26 | ;; quoted-printable to allow for better spam analysis. |
| 27 | ;; |
| 28 | ;; `spam-wash' should be called in a buffer containing the message. |
| 29 | |
| 30 | ;;; Code: |
| 31 | |
| 32 | (require 'gnus-art) |
| 33 | |
| 34 | (defun spam-wash () |
| 35 | "Treat the current buffer prior to spam analysis." |
| 36 | (interactive) |
| 37 | (run-hooks 'gnus-article-decode-hook) |
| 38 | (save-excursion |
| 39 | (save-restriction |
| 40 | (let* ((buffer-read-only nil) |
| 41 | (gnus-inhibit-treatment t) |
| 42 | (gnus-article-buffer (current-buffer)) |
| 43 | (handles (or (mm-dissect-buffer nil gnus-article-loose-mime) |
| 44 | (and gnus-article-emulate-mime |
| 45 | (mm-uu-dissect)))) |
| 46 | handle) |
| 47 | (when gnus-article-mime-handles |
| 48 | (mm-destroy-parts gnus-article-mime-handles) |
| 49 | (setq gnus-article-mime-handle-alist nil)) |
| 50 | (setq gnus-article-mime-handles handles) |
| 51 | (when (and handles |
| 52 | (or (not (stringp (car handles))) |
| 53 | (cdr handles))) |
| 54 | (article-goto-body) |
| 55 | (delete-region (point) (point-max)) |
| 56 | (spam-treat-parts handles)))))) |
| 57 | |
| 58 | (defun spam-treat-parts (handle) |
| 59 | (if (stringp (car handle)) |
| 60 | (mapcar 'spam-treat-parts (cdr handle)) |
| 61 | (if (bufferp (car handle)) |
| 62 | (save-restriction |
| 63 | (narrow-to-region (point) (point)) |
| 64 | (when (let ((case-fold-search t)) |
| 65 | (string-match "text" (car (mm-handle-type handle)))) |
| 66 | (mm-insert-part handle)) |
| 67 | (goto-char (point-max))) |
| 68 | (mapcar 'spam-treat-parts handle)))) |
| 69 | |
| 70 | (provide 'spam-wash) |
| 71 | |
| 72 | ;;; spam-wash.el ends here |