1 ;;; spam.el --- Identifying spam
2 ;; Copyright (C) 2002, 2003 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
26 ;;; This module addresses a few aspects of spam control under Gnus. Page
27 ;;; breaks are used for grouping declarations and documentation relating to
28 ;;; each particular aspect.
30 ;;; The integration with Gnus is not yet complete. See various `FIXME'
31 ;;; comments, below, for supplementary explanations or discussions.
33 ;;; Several TODO items are marked as such
39 (require 'gnus-uu) ; because of key prefix issues
40 (require 'gnus) ; for the definitions of group content classification and spam processors
41 (require 'message) ;for the message-fetch-field functions
43 ;; for nnimap-split-download-body-default
44 (eval-when-compile (require 'nnimap))
46 ;; autoload executable-find
48 ;; executable-find is not autoloaded in Emacs 20
49 (autoload 'executable-find "executable"))
53 (autoload 'query-dig "dig"))
57 (autoload 'query-dns "dns"))
62 "Spam configuration.")
64 (defcustom spam-directory "~/News/spam/"
65 "Directory for spam whitelists and blacklists."
69 (defcustom spam-move-spam-nonspam-groups-only t
70 "Whether spam should be moved in non-spam groups only.
71 When nil, only ham and unclassified groups will have their spam moved
72 to the spam-process-destination. When t, spam will also be moved from
77 (defcustom spam-mark-ham-unread-before-move-from-spam-group nil
78 "Whether ham should be marked unread before it's moved out of a spam
79 group according to ham-process-destination. This variable is an
80 official entry in the international Longest Variable Name
85 (defcustom spam-whitelist (expand-file-name "whitelist" spam-directory)
86 "The location of the whitelist.
87 The file format is one regular expression per line.
88 The regular expression is matched against the address."
92 (defcustom spam-blacklist (expand-file-name "blacklist" spam-directory)
93 "The location of the blacklist.
94 The file format is one regular expression per line.
95 The regular expression is matched against the address."
99 (defcustom spam-use-dig t
100 "Whether query-dig should be used instead of query-dns."
104 (defcustom spam-use-blacklist nil
105 "Whether the blacklist should be used by spam-split."
109 (defcustom spam-use-whitelist nil
110 "Whether the whitelist should be used by spam-split."
114 (defcustom spam-use-whitelist-exclusive nil
115 "Whether whitelist-exclusive should be used by spam-split.
116 Exclusive whitelisting means that all messages from senders not in the whitelist
117 are considered spam."
121 (defcustom spam-use-blackholes nil
122 "Whether blackholes should be used by spam-split."
126 (defcustom spam-use-hashcash nil
127 "Whether hashcash payments should be detected by spam-split."
131 (defcustom spam-use-regex-headers nil
132 "Whether a header regular expression match should be used by spam-split.
133 Also see the variable `spam-spam-regex-headers' and `spam-ham-regex-headers'."
137 (defcustom spam-use-bogofilter-headers nil
138 "Whether bogofilter headers should be used by spam-split.
139 Enable this if you pre-process messages with Bogofilter BEFORE Gnus sees them."
143 (defcustom spam-use-bogofilter nil
144 "Whether bogofilter should be invoked by spam-split.
145 Enable this if you want Gnus to invoke Bogofilter on new messages."
149 (defcustom spam-use-BBDB nil
150 "Whether BBDB should be used by spam-split."
154 (defcustom spam-use-BBDB-exclusive nil
155 "Whether BBDB-exclusive should be used by spam-split.
156 Exclusive BBDB means that all messages from senders not in the BBDB are
161 (defcustom spam-use-ifile nil
162 "Whether ifile should be used by spam-split."
166 (defcustom spam-use-stat nil
167 "Whether spam-stat should be used by spam-split."
171 (defcustom spam-split-group "spam"
172 "Group name where incoming spam should be put by spam-split."
176 (defcustom spam-junk-mailgroups (cons spam-split-group '("mail.junk" "poste.pourriel"))
177 "Mailgroups with spam contents.
178 All unmarked article in such group receive the spam mark on group entry."
179 :type '(repeat (string :tag "Group"))
182 (defcustom spam-blackhole-servers '("bl.spamcop.net" "relays.ordb.org"
183 "dev.null.dk" "relays.visi.com")
184 "List of blackhole servers."
185 :type '(repeat (string :tag "Server"))
188 (defcustom spam-blackhole-good-server-regex nil
189 "String matching IP addresses that should not be checked in the blackholes"
193 (defcustom spam-ham-marks (list 'gnus-del-mark 'gnus-read-mark
194 'gnus-killed-mark 'gnus-kill-file-mark
195 'gnus-low-score-mark)
196 "Marks considered as being ham (positively not spam).
197 Such articles will be processed as ham (non-spam) on group exit."
199 (variable-item gnus-del-mark)
200 (variable-item gnus-read-mark)
201 (variable-item gnus-killed-mark)
202 (variable-item gnus-kill-file-mark)
203 (variable-item gnus-low-score-mark))
206 (defcustom spam-spam-marks (list 'gnus-spam-mark)
207 "Marks considered as being spam (positively spam).
208 Such articles will be transmitted to `bogofilter -s' on group exit."
210 (variable-item gnus-spam-mark)
211 (variable-item gnus-killed-mark)
212 (variable-item gnus-kill-file-mark)
213 (variable-item gnus-low-score-mark))
216 (defcustom spam-face 'gnus-splash-face
217 "Face for spam-marked articles"
221 (defcustom spam-regex-headers-spam '("^X-Spam-Flag: YES")
222 "Regular expression for positive header spam matches"
223 :type '(repeat (regexp :tag "Regular expression to match spam header"))
226 (defcustom spam-regex-headers-ham '("^X-Spam-Flag: NO")
227 "Regular expression for positive header ham matches"
228 :type '(repeat (regexp :tag "Regular expression to match ham header"))
231 (defgroup spam-ifile nil
232 "Spam ifile configuration."
235 (defcustom spam-ifile-path (executable-find "ifile")
236 "File path of the ifile executable program."
237 :type '(choice (file :tag "Location of ifile")
238 (const :tag "ifile is not installed"))
241 (defcustom spam-ifile-database-path nil
242 "File path of the ifile database."
243 :type '(choice (file :tag "Location of the ifile database")
244 (const :tag "Use the default"))
247 (defcustom spam-ifile-spam-category "spam"
248 "Name of the spam ifile category."
252 (defcustom spam-ifile-ham-category nil
253 "Name of the ham ifile category. If nil, the current group name will
255 :type '(choice (string :tag "Use a fixed category")
256 (const :tag "Use the current group name"))
259 (defcustom spam-ifile-all-categories nil
260 "Whether the ifile check will return all categories, or just spam.
261 Set this to t if you want to use the spam-split invocation of ifile as
262 your main source of newsgroup names."
266 (defgroup spam-bogofilter nil
267 "Spam bogofilter configuration."
270 (defcustom spam-bogofilter-path (executable-find "bogofilter")
271 "File path of the Bogofilter executable program."
272 :type '(choice (file :tag "Location of bogofilter")
273 (const :tag "Bogofilter is not installed"))
274 :group 'spam-bogofilter)
276 (defcustom spam-bogofilter-header "X-Bogosity"
277 "The header that Bogofilter inserts in messages."
279 :group 'spam-bogofilter)
281 (defcustom spam-bogofilter-spam-switch "-s"
282 "The switch that Bogofilter uses to register spam messages."
284 :group 'spam-bogofilter)
286 (defcustom spam-bogofilter-ham-switch "-n"
287 "The switch that Bogofilter uses to register ham messages."
289 :group 'spam-bogofilter)
291 (defcustom spam-bogofilter-bogosity-positive-spam-header "^\\(Yes\\|Spam\\)"
292 "The regex on `spam-bogofilter-header' for positive spam identification."
294 :group 'spam-bogofilter)
296 (defcustom spam-bogofilter-database-directory nil
297 "Directory path of the Bogofilter databases."
298 :type '(choice (directory :tag "Location of the Bogofilter database directory")
299 (const :tag "Use the default"))
302 ;;; Key bindings for spam control.
304 (gnus-define-keys gnus-summary-mode-map
305 "St" spam-bogofilter-score
306 "Sx" gnus-summary-mark-as-spam
307 "Mst" spam-bogofilter-score
308 "Msx" gnus-summary-mark-as-spam
309 "\M-d" gnus-summary-mark-as-spam)
311 ;;; How to highlight a spam summary line.
313 ;; TODO: How do we redo this every time spam-face is customized?
315 (push '((eq mark gnus-spam-mark) . spam-face)
316 gnus-summary-highlight)
318 ;; convenience functions
319 (defun spam-group-spam-contents-p (group)
321 (or (member group spam-junk-mailgroups)
322 (memq 'gnus-group-spam-classification-spam
323 (gnus-parameter-spam-contents group)))
326 (defun spam-group-ham-contents-p (group)
328 (memq 'gnus-group-spam-classification-ham
329 (gnus-parameter-spam-contents group))
332 (defun spam-group-processor-p (group processor)
333 (if (and (stringp group)
335 (member processor (car (gnus-parameter-spam-process group)))
338 (defun spam-group-spam-processor-bogofilter-p (group)
339 (spam-group-processor-p group 'gnus-group-spam-exit-processor-bogofilter))
341 (defun spam-group-spam-processor-blacklist-p (group)
342 (spam-group-processor-p group 'gnus-group-spam-exit-processor-blacklist))
344 (defun spam-group-spam-processor-ifile-p (group)
345 (spam-group-processor-p group 'gnus-group-spam-exit-processor-ifile))
347 (defun spam-group-ham-processor-ifile-p (group)
348 (spam-group-processor-p group 'gnus-group-ham-exit-processor-ifile))
350 (defun spam-group-ham-processor-bogofilter-p (group)
351 (spam-group-processor-p group 'gnus-group-ham-exit-processor-bogofilter))
353 (defun spam-group-spam-processor-stat-p (group)
354 (spam-group-processor-p group 'gnus-group-spam-exit-processor-stat))
356 (defun spam-group-ham-processor-stat-p (group)
357 (spam-group-processor-p group 'gnus-group-ham-exit-processor-stat))
359 (defun spam-group-ham-processor-whitelist-p (group)
360 (spam-group-processor-p group 'gnus-group-ham-exit-processor-whitelist))
362 (defun spam-group-ham-processor-BBDB-p (group)
363 (spam-group-processor-p group 'gnus-group-ham-exit-processor-BBDB))
365 (defun spam-group-ham-processor-copy-p (group)
366 (spam-group-processor-p group 'gnus-group-ham-exit-processor-copy))
368 ;;; Summary entry and exit processing.
370 (defun spam-summary-prepare ()
371 (spam-mark-junk-as-spam-routine))
373 (add-hook 'gnus-summary-prepare-hook 'spam-summary-prepare)
375 ;; The spam processors are invoked for any group, spam or ham or neither
376 (defun spam-summary-prepare-exit ()
377 (unless gnus-group-is-exiting-without-update-p
378 (gnus-message 6 "Exiting summary buffer and applying spam rules")
379 (when (and spam-bogofilter-path
380 (spam-group-spam-processor-bogofilter-p gnus-newsgroup-name))
381 (gnus-message 5 "Registering spam with bogofilter")
382 (spam-bogofilter-register-spam-routine))
384 (when (and spam-ifile-path
385 (spam-group-spam-processor-ifile-p gnus-newsgroup-name))
386 (gnus-message 5 "Registering spam with ifile")
387 (spam-ifile-register-spam-routine))
389 (when (spam-group-spam-processor-stat-p gnus-newsgroup-name)
390 (gnus-message 5 "Registering spam with spam-stat")
391 (spam-stat-register-spam-routine))
393 (when (spam-group-spam-processor-blacklist-p gnus-newsgroup-name)
394 (gnus-message 5 "Registering spam with the blacklist")
395 (spam-blacklist-register-routine))
397 (if spam-move-spam-nonspam-groups-only
398 (when (not (spam-group-spam-contents-p gnus-newsgroup-name))
399 (spam-mark-spam-as-expired-and-move-routine
400 (gnus-parameter-spam-process-destination gnus-newsgroup-name)))
401 (gnus-message 5 "Marking spam as expired and moving it to %s" gnus-newsgroup-name)
402 (spam-mark-spam-as-expired-and-move-routine
403 (gnus-parameter-spam-process-destination gnus-newsgroup-name)))
405 ;; now we redo spam-mark-spam-as-expired-and-move-routine to only
406 ;; expire spam, in case the above did not expire them
407 (gnus-message 5 "Marking spam as expired without moving it")
408 (spam-mark-spam-as-expired-and-move-routine nil)
410 (when (spam-group-ham-contents-p gnus-newsgroup-name)
411 (when (spam-group-ham-processor-whitelist-p gnus-newsgroup-name)
412 (gnus-message 5 "Registering ham with the whitelist")
413 (spam-whitelist-register-routine))
414 (when (spam-group-ham-processor-ifile-p gnus-newsgroup-name)
415 (gnus-message 5 "Registering ham with ifile")
416 (spam-ifile-register-ham-routine))
417 (when (spam-group-ham-processor-bogofilter-p gnus-newsgroup-name)
418 (gnus-message 5 "Registering ham with Bogofilter")
419 (spam-bogofilter-register-ham-routine))
420 (when (spam-group-ham-processor-stat-p gnus-newsgroup-name)
421 (gnus-message 5 "Registering ham with spam-stat")
422 (spam-stat-register-ham-routine))
423 (when (spam-group-ham-processor-BBDB-p gnus-newsgroup-name)
424 (gnus-message 5 "Registering ham with the BBDB")
425 (spam-BBDB-register-routine)))
427 (when (spam-group-ham-processor-copy-p gnus-newsgroup-name)
428 (gnus-message 5 "Copying ham")
429 (spam-ham-move-routine
430 (gnus-parameter-ham-process-destination gnus-newsgroup-name) t))
432 ;; now move all ham articles out of spam groups
433 (when (spam-group-spam-contents-p gnus-newsgroup-name)
434 (gnus-message 5 "Moving ham messages from spam group")
435 (spam-ham-move-routine
436 (gnus-parameter-ham-process-destination gnus-newsgroup-name)))))
438 (add-hook 'gnus-summary-prepare-exit-hook 'spam-summary-prepare-exit)
440 (defun spam-mark-junk-as-spam-routine ()
441 ;; check the global list of group names spam-junk-mailgroups and the
443 (when (spam-group-spam-contents-p gnus-newsgroup-name)
444 (gnus-message 5 "Marking unread articles as spam")
445 (let ((articles gnus-newsgroup-articles)
448 (setq article (pop articles))
449 (when (eq (gnus-summary-article-mark article) gnus-unread-mark)
450 (gnus-summary-mark-article article gnus-spam-mark))))))
452 (defun spam-mark-spam-as-expired-and-move-routine (&optional group)
453 (gnus-summary-kill-process-mark)
454 (let ((articles gnus-newsgroup-articles)
456 (dolist (article articles)
457 (when (eq (gnus-summary-article-mark article) gnus-spam-mark)
458 (gnus-summary-mark-article article gnus-expirable-mark)
459 (push article tomove)))
461 ;; now do the actual move
464 (dolist (article tomove)
465 (gnus-summary-set-process-mark article))
466 (when tomove (gnus-summary-move-article nil group))))
467 (gnus-summary-yank-process-mark))
469 (defun spam-ham-move-routine (&optional group copy)
470 (gnus-summary-kill-process-mark)
471 (let ((articles gnus-newsgroup-articles)
472 article ham-mark-values mark tomove)
473 (when (stringp group) ; this routine will do nothing
474 ; without a valid group
475 (dolist (mark spam-ham-marks)
476 (push (symbol-value mark) ham-mark-values))
477 (dolist (article articles)
478 (when (memq (gnus-summary-article-mark article) ham-mark-values)
479 (push article tomove)))
481 ;; now do the actual move
483 (dolist (article tomove)
484 (when spam-mark-ham-unread-before-move-from-spam-group
485 (gnus-summary-mark-article article gnus-unread-mark))
486 (gnus-summary-set-process-mark article))
488 (gnus-summary-copy-article nil group)
489 (gnus-summary-move-article nil group)))))
490 (gnus-summary-yank-process-mark))
492 (defun spam-generic-register-routine (spam-func ham-func)
493 (let ((articles gnus-newsgroup-articles)
494 article mark ham-articles spam-articles spam-mark-values
497 ;; marks are stored as symbolic values, so we have to dereference
498 ;; them for memq to work. we wouldn't have to do this if
499 ;; gnus-summary-article-mark returned a symbol.
500 (dolist (mark spam-ham-marks)
501 (push (symbol-value mark) ham-mark-values))
503 (dolist (mark spam-spam-marks)
504 (push (symbol-value mark) spam-mark-values))
507 (setq article (pop articles)
508 mark (gnus-summary-article-mark article))
509 (cond ((memq mark spam-mark-values) (push article spam-articles))
510 ((memq article gnus-newsgroup-saved))
511 ((memq mark ham-mark-values) (push article ham-articles))))
512 (when (and ham-articles ham-func)
513 (mapc ham-func ham-articles)) ; we use mapc because unlike
514 ; mapcar it discards the
516 (when (and spam-articles spam-func)
517 (mapc spam-func spam-articles)))) ; we use mapc because unlike
518 ; mapcar it discards the
522 (defalias 'spam-point-at-eol (if (fboundp 'point-at-eol)
524 'line-end-position)))
526 (defun spam-get-article-as-string (article)
527 (let ((article-buffer (spam-get-article-as-buffer article))
530 (save-window-excursion
531 (set-buffer article-buffer)
532 (setq article-string (buffer-string))))
535 (defun spam-get-article-as-buffer (article)
536 (let ((article-buffer))
537 (when (numberp article)
538 (save-window-excursion
539 (gnus-summary-goto-subject article)
540 (gnus-summary-show-article t)
541 (setq article-buffer (get-buffer gnus-article-buffer))))
545 ;; (defun spam-get-article-as-filename (article)
546 ;; (let ((article-filename))
547 ;; (when (numberp article)
548 ;; (nnml-possibly-change-directory (gnus-group-real-name gnus-newsgroup-name))
549 ;; (setq article-filename (expand-file-name (int-to-string article) nnml-current-directory)))
550 ;; (if (file-exists-p article-filename)
554 (defun spam-fetch-field-from-fast (article)
555 "Fetch the `from' field quickly, using the internal gnus-data-list function"
556 (if (and (numberp article)
557 (assoc article (gnus-data-list nil)))
558 (mail-header-from (gnus-data-header (assoc article (gnus-data-list nil))))
561 (defun spam-fetch-field-subject-fast (article)
562 "Fetch the `subject' field quickly, using the internal gnus-data-list function"
563 (if (and (numberp article)
564 (assoc article (gnus-data-list nil)))
565 (mail-header-subject (gnus-data-header (assoc article (gnus-data-list nil))))
569 ;;;; Spam determination.
571 (defvar spam-list-of-checks
572 '((spam-use-blacklist . spam-check-blacklist)
573 (spam-use-regex-headers . spam-check-regex-headers)
574 (spam-use-whitelist . spam-check-whitelist)
575 (spam-use-BBDB . spam-check-BBDB)
576 (spam-use-ifile . spam-check-ifile)
577 (spam-use-stat . spam-check-stat)
578 (spam-use-blackholes . spam-check-blackholes)
579 (spam-use-hashcash . spam-check-hashcash)
580 (spam-use-bogofilter-headers . spam-check-bogofilter-headers)
581 (spam-use-bogofilter . spam-check-bogofilter))
582 "The spam-list-of-checks list contains pairs associating a parameter
583 variable with a spam checking function. If the parameter variable is
584 true, then the checking function is called, and its value decides what
585 happens. Each individual check may return nil, t, or a mailgroup
586 name. The value nil means that the check does not yield a decision,
587 and so, that further checks are needed. The value t means that the
588 message is definitely not spam, and that further spam checks should be
589 inhibited. Otherwise, a mailgroup name is returned where the mail
590 should go, and further checks are also inhibited. The usual mailgroup
591 name is the value of `spam-split-group', meaning that the message is
594 (defvar spam-list-of-statistical-checks
595 '(spam-use-ifile spam-use-stat spam-use-bogofilter)
596 "The spam-list-of-statistical-checks list contains all the mail
597 splitters that need to have the full message body available.")
600 "Split this message into the `spam' group if it is spam.
601 This function can be used as an entry in `nnmail-split-fancy', for
602 example like this: (: spam-split)
604 See the Info node `(gnus)Fancy Mail Splitting' for more details."
607 (dolist (check spam-list-of-statistical-checks)
608 (when (symbol-value check)
610 (gnus-message 8 "spam-split: widening the buffer (%s requires it)"
613 ;; (progn (widen) (debug (buffer-string)))
614 (let ((list-of-checks spam-list-of-checks)
616 (while (and list-of-checks (not decision))
617 (let ((pair (pop list-of-checks)))
618 (when (symbol-value (car pair))
619 (gnus-message 5 "spam-split: calling the %s function" (symbol-name (cdr pair)))
620 (setq decision (funcall (cdr pair))))))
625 (defun spam-setup-widening ()
626 (dolist (check spam-list-of-statistical-checks)
627 (when (symbol-value check)
628 (setq nnimap-split-download-body-default t))))
630 (add-hook 'gnus-get-new-news-hook 'spam-setup-widening)
635 (defun spam-check-regex-headers ()
637 (dolist (h-regex spam-regex-headers-ham)
639 (goto-char (point-min))
640 (when (re-search-forward h-regex nil t)
641 (message "Ham regex header search positive.")
643 (dolist (s-regex spam-regex-headers-spam)
645 (goto-char (point-min))
646 (when (re-search-forward s-regex nil t)
647 (message "Spam regex header search positive." (match-string 1))
649 (setq ret spam-split-group))))
655 (defun spam-check-blackholes ()
656 "Check the Received headers for blackholed relays."
657 (let ((headers (message-fetch-field "received"))
662 (goto-char (point-min))
663 (gnus-message 5 "Checking headers for relay addresses")
664 (while (re-search-forward
665 "\\[\\([0-9]+.[0-9]+.[0-9]+.[0-9]+\\)\\]" nil t)
666 (gnus-message 9 "Blackhole search found host IP %s." (match-string 1))
667 (push (mapconcat 'identity
668 (nreverse (split-string (match-string 1) "\\."))
671 (dolist (server spam-blackhole-servers)
673 (unless (and spam-blackhole-good-server-regex
674 (string-match spam-blackhole-good-server-regex ip))
675 (let ((query-string (concat ip "." server)))
677 (let ((query-result (query-dig query-string)))
679 (gnus-message 5 "(DIG): positive blackhole check '%s'"
681 (push (list ip server query-result)
683 ;; else, if not using dig.el
684 (when (query-dns query-string)
685 (gnus-message 5 "positive blackhole check")
686 (push (list ip server (query-dns query-string 'TXT))
697 (defun spam-check-hashcash ()
698 "Check the headers for hashcash payments."
699 (mail-check-payment))) ;mail-check-payment returns a boolean
702 (defalias 'mail-check-payment 'ignore)
703 (defalias 'spam-check-hashcash 'ignore))))
707 ;;; original idea for spam-check-BBDB from Alexander Kotelnikov
708 ;;; <sacha@giotto.sj.ru>
710 ;; all this is done inside a condition-case to trap errors
717 (defun spam-enter-ham-BBDB (from)
718 "Enter an address into the BBDB; implies ham (non-spam) sender"
720 (let* ((parsed-address (gnus-extract-address-components from))
721 (name (or (car parsed-address) "Ham Sender"))
722 (net-address (car (cdr parsed-address))))
723 (gnus-message 5 "Adding address %s to BBDB" from)
724 (when (and net-address
725 (not (bbdb-search-simple nil net-address)))
726 (bbdb-create-internal name nil net-address nil nil
727 "ham sender added by spam.el")))))
729 (defun spam-BBDB-register-routine ()
730 (spam-generic-register-routine
735 (spam-enter-ham-BBDB (spam-fetch-field-from-fast article)))))
737 (defun spam-check-BBDB ()
738 "Mail from people in the BBDB is classified as ham or non-spam"
739 (let ((who (message-fetch-field "from")))
741 (setq who (cadr (gnus-extract-address-components who)))
742 (if (bbdb-search-simple nil who)
744 (if spam-use-BBDB-exclusive
749 (defalias 'bbdb-search-simple 'ignore)
750 (defalias 'spam-check-BBDB 'ignore)
751 (defalias 'spam-BBDB-register-routine 'ignore)
752 (defalias 'spam-enter-ham-BBDB 'ignore)
753 (defalias 'bbdb-create-internal 'ignore)
754 (defalias 'bbdb-records 'ignore))))
759 ;;; check the ifile backend; return nil if the mail was NOT classified
762 (defun spam-get-ifile-database-parameter ()
763 "Get the command-line parameter for ifile's database from spam-ifile-database-path."
764 (if spam-ifile-database-path
765 (format "--db-file=%s" spam-ifile-database-path)
768 (defun spam-check-ifile ()
769 "Check the ifile backend for the classification of this message"
770 (let ((article-buffer-name (buffer-name))
773 (let ((temp-buffer-name (buffer-name))
774 (db-param (spam-get-ifile-database-parameter)))
776 (set-buffer article-buffer-name)
778 (call-process-region (point-min) (point-max) spam-ifile-path
779 nil temp-buffer-name nil "-q" "-c" db-param)
780 (call-process-region (point-min) (point-max) spam-ifile-path
781 nil temp-buffer-name nil "-q" "-c")))
782 (goto-char (point-min))
784 (setq category (buffer-substring (point) (spam-point-at-eol))))
785 (when (not (zerop (length category))) ; we need a category here
786 (if spam-ifile-all-categories
787 (setq return category)
788 ;; else, if spam-ifile-all-categories is not set...
789 (when (string-equal spam-ifile-spam-category category)
790 (setq return spam-split-group))))))
793 (defun spam-ifile-register-with-ifile (article-string category)
794 "Register an article, given as a string, with a category.
795 Uses `gnus-newsgroup-name' if category is nil (for ham registration)."
796 (when (stringp article-string)
797 (let ((category (or category gnus-newsgroup-name))
798 (db-param (spam-get-ifile-database-parameter)))
800 (insert article-string)
802 (call-process-region (point-min) (point-max) spam-ifile-path
804 "-h" "-i" category db-param)
805 (call-process-region (point-min) (point-max) spam-ifile-path
807 "-h" "-i" category))))))
809 (defun spam-ifile-register-spam-routine ()
810 (spam-generic-register-routine
812 (spam-ifile-register-with-ifile
813 (spam-get-article-as-string article) spam-ifile-spam-category))
816 (defun spam-ifile-register-ham-routine ()
817 (spam-generic-register-routine
820 (spam-ifile-register-with-ifile
821 (spam-get-article-as-string article) spam-ifile-ham-category))))
828 (let ((spam-stat-install-hooks nil))
829 (require 'spam-stat))
831 (defun spam-check-stat ()
832 "Check the spam-stat backend for the classification of this message"
833 (let ((spam-stat-split-fancy-spam-group spam-split-group) ; override
834 (spam-stat-buffer (buffer-name)) ; stat the current buffer
836 (spam-stat-split-fancy)))
838 (defun spam-stat-register-spam-routine ()
839 (spam-generic-register-routine
841 (let ((article-string (spam-get-article-as-string article)))
843 (insert article-string)
844 (spam-stat-buffer-is-spam))))
847 (defun spam-stat-register-ham-routine ()
848 (spam-generic-register-routine
851 (let ((article-string (spam-get-article-as-string article)))
853 (insert article-string)
854 (spam-stat-buffer-is-non-spam))))))
856 (defun spam-maybe-spam-stat-load ()
857 (when spam-use-stat (spam-stat-load)))
859 (defun spam-maybe-spam-stat-save ()
860 (when spam-use-stat (spam-stat-save)))
862 ;; Add hooks for loading and saving the spam stats
863 (add-hook 'gnus-save-newsrc-hook 'spam-maybe-spam-stat-save)
864 (add-hook 'gnus-get-top-new-news-hook 'spam-maybe-spam-stat-load)
865 (add-hook 'gnus-startup-hook 'spam-maybe-spam-stat-load))
868 (defalias 'spam-stat-register-ham-routine 'ignore)
869 (defalias 'spam-stat-register-spam-routine 'ignore)
870 (defalias 'spam-stat-buffer-is-spam 'ignore)
871 (defalias 'spam-stat-buffer-is-non-spam 'ignore)
872 (defalias 'spam-stat-split-fancy 'ignore)
873 (defalias 'spam-stat-load 'ignore)
874 (defalias 'spam-stat-save 'ignore)
875 (defalias 'spam-check-stat 'ignore))))
879 ;;;; Blacklists and whitelists.
881 (defvar spam-whitelist-cache nil)
882 (defvar spam-blacklist-cache nil)
884 (defun spam-enter-whitelist (address)
885 "Enter ADDRESS into the whitelist."
886 (interactive "sAddress: ")
887 (spam-enter-list address spam-whitelist)
888 (setq spam-whitelist-cache nil))
890 (defun spam-enter-blacklist (address)
891 "Enter ADDRESS into the blacklist."
892 (interactive "sAddress: ")
893 (spam-enter-list address spam-blacklist)
894 (setq spam-blacklist-cache nil))
896 (defun spam-enter-list (address file)
897 "Enter ADDRESS into the given FILE, either the whitelist or the blacklist."
898 (unless (file-exists-p (file-name-directory file))
899 (make-directory (file-name-directory file) t))
902 (find-file-noselect file))
903 (goto-char (point-max))
906 (insert address "\n")
909 ;;; returns t if the sender is in the whitelist, nil or spam-split-group otherwise
910 (defun spam-check-whitelist ()
911 ;; FIXME! Should it detect when file timestamps change?
912 (unless spam-whitelist-cache
913 (setq spam-whitelist-cache (spam-parse-list spam-whitelist)))
914 (if (spam-from-listed-p spam-whitelist-cache)
916 (if spam-use-whitelist-exclusive
920 (defun spam-check-blacklist ()
921 ;; FIXME! Should it detect when file timestamps change?
922 (unless spam-blacklist-cache
923 (setq spam-blacklist-cache (spam-parse-list spam-blacklist)))
924 (and (spam-from-listed-p spam-blacklist-cache) spam-split-group))
926 (defun spam-parse-list (file)
927 (when (file-readable-p file)
928 (let (contents address)
930 (insert-file-contents file)
932 (setq address (buffer-substring (point) (spam-point-at-eol)))
934 (unless (zerop (length address))
935 (setq address (regexp-quote address))
936 (while (string-match "\\\\\\*" address)
937 (setq address (replace-match ".*" t t address)))
938 (push address contents))))
939 (nreverse contents))))
941 (defun spam-from-listed-p (cache)
942 (let ((from (message-fetch-field "from"))
945 (when (string-match (pop cache) from)
950 (defun spam-blacklist-register-routine ()
951 (spam-generic-register-routine
954 (let ((from (spam-fetch-field-from-fast article)))
956 (spam-enter-blacklist from))))
960 (defun spam-whitelist-register-routine ()
961 (spam-generic-register-routine
966 (let ((from (spam-fetch-field-from-fast article)))
968 (spam-enter-whitelist from))))))
973 (defun spam-check-bogofilter-headers (&optional score)
974 (let ((header (message-fetch-field spam-bogofilter-header)))
976 (string-match spam-bogofilter-bogosity-positive-spam-header
979 (when (string-match "spamicity=\\([0-9.]+\\)" header)
980 (match-string 1 header))
983 ;; return something sensible if the score can't be determined
984 (defun spam-bogofilter-score ()
985 "Get the Bogofilter spamicity score"
987 (save-window-excursion
988 (gnus-summary-show-article t)
989 (set-buffer gnus-article-buffer)
990 (let ((score (spam-check-bogofilter t)))
991 (message "Spamicity score %s" score)
994 (defun spam-check-bogofilter (&optional score)
995 "Check the Bogofilter backend for the classification of this message"
996 (let ((article-buffer-name (buffer-name))
999 (let ((temp-buffer-name (buffer-name)))
1001 (set-buffer article-buffer-name)
1002 (if spam-bogofilter-database-directory
1003 (call-process-region (point-min) (point-max)
1004 spam-bogofilter-path
1005 nil temp-buffer-name nil "-v"
1006 "-d" spam-bogofilter-database-directory)
1007 (call-process-region (point-min) (point-max) spam-bogofilter-path
1008 nil temp-buffer-name nil "-v")))
1009 (setq return (spam-check-bogofilter-headers score))))
1012 (defun spam-bogofilter-register-with-bogofilter (article-string spam)
1013 "Register an article, given as a string, as spam or non-spam."
1014 (when (stringp article-string)
1015 (let ((switch (if spam spam-bogofilter-spam-switch
1016 spam-bogofilter-ham-switch)))
1018 (insert article-string)
1019 (if spam-bogofilter-database-directory
1020 (call-process-region (point-min) (point-max)
1021 spam-bogofilter-path
1022 nil nil nil "-v" switch
1023 "-d" spam-bogofilter-database-directory)
1024 (call-process-region (point-min) (point-max) spam-bogofilter-path
1025 nil nil nil "-v" switch))))))
1027 (defun spam-bogofilter-register-spam-routine ()
1028 (spam-generic-register-routine
1030 (spam-bogofilter-register-with-bogofilter
1031 (spam-get-article-as-string article) t))
1034 (defun spam-bogofilter-register-ham-routine ()
1035 (spam-generic-register-routine
1038 (spam-bogofilter-register-with-bogofilter
1039 (spam-get-article-as-string article) nil))))
1043 ;;; spam.el ends here.