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emacs/lisp/gnus/spam.el
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;;; spam.el --- Identifying spam
;; Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: network
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; This module addresses a few aspects of spam control under Gnus. Page
;;; breaks are used for grouping declarations and documentation relating to
;;; each particular aspect.
;;; The integration with Gnus is not yet complete. See various `FIXME'
;;; comments, below, for supplementary explanations or discussions.
;;; Several TODO items are marked as such
;; TODO: spam scores, detection of spam in newsgroups, cross-server splitting,
;; remote processing, training through files
;;; Code:
(eval-when-compile (require 'cl))
(require 'gnus-sum)
(require 'gnus-uu) ; because of key prefix issues
;;; for the definitions of group content classification and spam processors
(require 'gnus)
(require 'message) ;for the message-fetch-field functions
;; for nnimap-split-download-body-default
(eval-when-compile (require 'nnimap))
;; autoload executable-find
(eval-and-compile
;; executable-find is not autoloaded in Emacs 20
(autoload 'executable-find "executable"))
;; autoload query-dig
(eval-and-compile
(autoload 'query-dig "dig"))
;; autoload spam-report
(eval-and-compile
(autoload 'spam-report-gmane "spam-report"))
;; autoload gnus-registry
(eval-and-compile
(autoload 'gnus-registry-group-count "gnus-registry")
(autoload 'gnus-registry-add-group "gnus-registry")
(autoload 'gnus-registry-store-extra-entry "gnus-registry")
(autoload 'gnus-registry-fetch-extra "gnus-registry"))
;; autoload query-dns
(eval-and-compile
(autoload 'query-dns "dns"))
;;; Main parameters.
(defgroup spam nil
"Spam configuration."
:version "22.1"
:group 'mail
:group 'news)
(defcustom spam-directory (nnheader-concat gnus-directory "spam/")
"Directory for spam whitelists and blacklists."
:type 'directory
:group 'spam)
(defcustom spam-move-spam-nonspam-groups-only t
"Whether spam should be moved in non-spam groups only.
When t, only ham and unclassified groups will have their spam moved
to the spam-process-destination. When nil, spam will also be moved from
spam groups."
:type 'boolean
:group 'spam)
(defcustom spam-process-ham-in-nonham-groups nil
"Whether ham should be processed in non-ham groups."
:type 'boolean
:group 'spam)
(defcustom spam-log-to-registry nil
"Whether spam/ham processing should be logged in the registry."
:type 'boolean
:group 'spam)
(defcustom spam-split-symbolic-return nil
"Whether `spam-split' should work with symbols or group names."
:type 'boolean
:group 'spam)
(defcustom spam-split-symbolic-return-positive nil
"Whether `spam-split' should ALWAYS work with symbols or group names.
Do not set this if you use `spam-split' in a fancy split
method."
:type 'boolean
:group 'spam)
(defcustom spam-process-ham-in-spam-groups nil
"Whether ham should be processed in spam groups."
:type 'boolean
:group 'spam)
(defcustom spam-mark-only-unseen-as-spam t
"Whether only unseen articles should be marked as spam in spam groups.
When nil, all unread articles in a spam group are marked as
spam. Set this if you want to leave an article unread in a spam group
without losing it to the automatic spam-marking process."
:type 'boolean
:group 'spam)
(defcustom spam-mark-ham-unread-before-move-from-spam-group nil
"Whether ham should be marked unread before it's moved.
The article is moved out of a spam group according to ham-process-destination.
This variable is an official entry in the international Longest Variable Name
Competition."
:type 'boolean
:group 'spam)
(defcustom spam-disable-spam-split-during-ham-respool nil
"Whether `spam-split' should be ignored while resplitting ham in a process
destination. This is useful to prevent ham from ending up in the same spam
group after the resplit. Don't set this to t if you have spam-split as the
last rule in your split configuration."
:type 'boolean
:group 'spam)
(defcustom spam-autodetect-recheck-messages nil
"Should spam.el recheck all meessages when autodetecting?
Normally this is nil, so only unseen messages will be checked."
:type 'boolean
:group 'spam)
(defcustom spam-whitelist (expand-file-name "whitelist" spam-directory)
"The location of the whitelist.
The file format is one regular expression per line.
The regular expression is matched against the address."
:type 'file
:group 'spam)
(defcustom spam-blacklist (expand-file-name "blacklist" spam-directory)
"The location of the blacklist.
The file format is one regular expression per line.
The regular expression is matched against the address."
:type 'file
:group 'spam)
(defcustom spam-use-dig t
"Whether `query-dig' should be used instead of `query-dns'."
:type 'boolean
:group 'spam)
(defcustom spam-use-blacklist nil
"Whether the blacklist should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-blacklist-ignored-regexes nil
"Regular expressions that the blacklist should ignore."
:type '(repeat (regexp :tag "Regular expression to ignore when blacklisting"))
:group 'spam)
(defcustom spam-use-whitelist nil
"Whether the whitelist should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-whitelist-exclusive nil
"Whether whitelist-exclusive should be used by `spam-split'.
Exclusive whitelisting means that all messages from senders not in the whitelist
are considered spam."
:type 'boolean
:group 'spam)
(defcustom spam-use-blackholes nil
"Whether blackholes should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-hashcash nil
"Whether hashcash payments should be detected by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-regex-headers nil
"Whether a header regular expression match should be used by `spam-split'.
Also see the variables `spam-regex-headers-spam' and `spam-regex-headers-ham'."
:type 'boolean
:group 'spam)
(defcustom spam-use-regex-body nil
"Whether a body regular expression match should be used by `spam-split'.
Also see the variables `spam-regex-body-spam' and `spam-regex-body-ham'."
:type 'boolean
:group 'spam)
(defcustom spam-use-bogofilter-headers nil
"Whether bogofilter headers should be used by `spam-split'.
Enable this if you pre-process messages with Bogofilter BEFORE Gnus sees them."
:type 'boolean
:group 'spam)
(defcustom spam-use-bogofilter nil
"Whether bogofilter should be invoked by `spam-split'.
Enable this if you want Gnus to invoke Bogofilter on new messages."
:type 'boolean
:group 'spam)
(defcustom spam-use-BBDB nil
"Whether BBDB should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-BBDB-exclusive nil
"Whether BBDB-exclusive should be used by `spam-split'.
Exclusive BBDB means that all messages from senders not in the BBDB are
considered spam."
:type 'boolean
:group 'spam)
(defcustom spam-use-ifile nil
"Whether ifile should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-stat nil
"Whether `spam-stat' should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-use-spamoracle nil
"Whether spamoracle should be used by `spam-split'."
:type 'boolean
:group 'spam)
(defcustom spam-install-hooks (or
spam-use-dig
spam-use-blacklist
spam-use-whitelist
spam-use-whitelist-exclusive
spam-use-blackholes
spam-use-hashcash
spam-use-regex-headers
spam-use-regex-body
spam-use-bogofilter-headers
spam-use-bogofilter
spam-use-BBDB
spam-use-BBDB-exclusive
spam-use-ifile
spam-use-stat
spam-use-spamoracle)
"Whether the spam hooks should be installed.
Default to t if one of the spam-use-* variables is set."
:group 'spam
:type 'boolean)
(defcustom spam-split-group "spam"
"Group name where incoming spam should be put by `spam-split'."
:type 'string
:group 'spam)
;;; TODO: deprecate this variable, it's confusing since it's a list of strings,
;;; not regular expressions
(defcustom spam-junk-mailgroups (cons
spam-split-group
'("mail.junk" "poste.pourriel"))
"Mailgroups with spam contents.
All unmarked article in such group receive the spam mark on group entry."
:type '(repeat (string :tag "Group"))
:group 'spam)
(defcustom spam-blackhole-servers '("bl.spamcop.net" "relays.ordb.org"
"dev.null.dk" "relays.visi.com")
"List of blackhole servers."
:type '(repeat (string :tag "Server"))
:group 'spam)
(defcustom spam-blackhole-good-server-regex nil
"String matching IP addresses that should not be checked in the blackholes."
:type '(radio (const nil) regexp)
:group 'spam)
(defface spam
'((((class color) (type tty) (background dark))
(:foreground "gray80" :background "gray50"))
(((class color) (type tty) (background light))
(:foreground "gray50" :background "gray80"))
(((class color) (background dark))
(:foreground "ivory2"))
(((class color) (background light))
(:foreground "ivory4"))
(t :inverse-video t))
"Face for spam-marked articles."
:group 'spam)
;; backward-compatibility alias
(put 'spam-face 'face-alias 'spam)
(defcustom spam-face 'spam
"Face for spam-marked articles."
:type 'face
:group 'spam)
(defcustom spam-regex-headers-spam '("^X-Spam-Flag: YES")
"Regular expression for positive header spam matches."
:type '(repeat (regexp :tag "Regular expression to match spam header"))
:group 'spam)
(defcustom spam-regex-headers-ham '("^X-Spam-Flag: NO")
"Regular expression for positive header ham matches."
:type '(repeat (regexp :tag "Regular expression to match ham header"))
:group 'spam)
(defcustom spam-regex-body-spam '()
"Regular expression for positive body spam matches."
:type '(repeat (regexp :tag "Regular expression to match spam body"))
:group 'spam)
(defcustom spam-regex-body-ham '()
"Regular expression for positive body ham matches."
:type '(repeat (regexp :tag "Regular expression to match ham body"))
:group 'spam)
(defgroup spam-ifile nil
"Spam ifile configuration."
:group 'spam)
(defcustom spam-ifile-path (executable-find "ifile")
"File path of the ifile executable program."
:type '(choice (file :tag "Location of ifile")
(const :tag "ifile is not installed"))
:group 'spam-ifile)
(defcustom spam-ifile-database-path nil
"File path of the ifile database."
:type '(choice (file :tag "Location of the ifile database")
(const :tag "Use the default"))
:group 'spam-ifile)
(defcustom spam-ifile-spam-category "spam"
"Name of the spam ifile category."
:type 'string
:group 'spam-ifile)
(defcustom spam-ifile-ham-category nil
"Name of the ham ifile category.
If nil, the current group name will be used."
:type '(choice (string :tag "Use a fixed category")
(const :tag "Use the current group name"))
:group 'spam-ifile)
(defcustom spam-ifile-all-categories nil
"Whether the ifile check will return all categories, or just spam.
Set this to t if you want to use the `spam-split' invocation of ifile as
your main source of newsgroup names."
:type 'boolean
:group 'spam-ifile)
(defgroup spam-bogofilter nil
"Spam bogofilter configuration."
:group 'spam)
(defcustom spam-bogofilter-path (executable-find "bogofilter")
"File path of the Bogofilter executable program."
:type '(choice (file :tag "Location of bogofilter")
(const :tag "Bogofilter is not installed"))
:group 'spam-bogofilter)
(defcustom spam-bogofilter-header "X-Bogosity"
"The header that Bogofilter inserts in messages."
:type 'string
:group 'spam-bogofilter)
(defcustom spam-bogofilter-spam-switch "-s"
"The switch that Bogofilter uses to register spam messages."
:type 'string
:group 'spam-bogofilter)
(defcustom spam-bogofilter-ham-switch "-n"
"The switch that Bogofilter uses to register ham messages."
:type 'string
:group 'spam-bogofilter)
(defcustom spam-bogofilter-spam-strong-switch "-S"
"The switch that Bogofilter uses to unregister ham messages."
:type 'string
:group 'spam-bogofilter)
(defcustom spam-bogofilter-ham-strong-switch "-N"
"The switch that Bogofilter uses to unregister spam messages."
:type 'string
:group 'spam-bogofilter)
(defcustom spam-bogofilter-bogosity-positive-spam-header "^\\(Yes\\|Spam\\)"
"The regex on `spam-bogofilter-header' for positive spam identification."
:type 'regexp
:group 'spam-bogofilter)
(defcustom spam-bogofilter-database-directory nil
"Directory path of the Bogofilter databases."
:type '(choice (directory
:tag "Location of the Bogofilter database directory")
(const :tag "Use the default"))
:group 'spam-bogofilter)
(defgroup spam-spamoracle nil
"Spam spamoracle configuration."
:group 'spam)
(defcustom spam-spamoracle-database nil
"Location of spamoracle database file. When nil, use the default
spamoracle database."
:type '(choice (directory :tag "Location of spamoracle database file.")
(const :tag "Use the default"))
:group 'spam-spamoracle)
(defcustom spam-spamoracle-binary (executable-find "spamoracle")
"Location of the spamoracle binary."
:type '(choice (directory :tag "Location of the spamoracle binary")
(const :tag "Use the default"))
:group 'spam-spamoracle)
;;; Key bindings for spam control.
(gnus-define-keys gnus-summary-mode-map
"St" spam-bogofilter-score
"Sx" gnus-summary-mark-as-spam
"Mst" spam-bogofilter-score
"Msx" gnus-summary-mark-as-spam
"\M-d" gnus-summary-mark-as-spam)
(defvar spam-old-ham-articles nil
"List of old ham articles, generated when a group is entered.")
(defvar spam-old-spam-articles nil
"List of old spam articles, generated when a group is entered.")
(defvar spam-split-disabled nil
"If non-nil, `spam-split' is disabled, and always returns nil.")
(defvar spam-split-last-successful-check nil
"`spam-split' will set this to nil or a spam-use-XYZ check if it
finds ham or spam.")
;; convenience functions
(defun spam-xor (a b)
"Logical exclusive `or'."
(and (or a b) (not (and a b))))
(defun spam-group-ham-mark-p (group mark &optional spam)
(when (stringp group)
(let* ((marks (spam-group-ham-marks group spam))
(marks (if (symbolp mark)
marks
(mapcar 'symbol-value marks))))
(memq mark marks))))
(defun spam-group-spam-mark-p (group mark)
(spam-group-ham-mark-p group mark t))
(defun spam-group-ham-marks (group &optional spam)
(when (stringp group)
(let* ((marks (if spam
(gnus-parameter-spam-marks group)
(gnus-parameter-ham-marks group)))
(marks (car marks))
(marks (if (listp (car marks)) (car marks) marks)))
marks)))
(defun spam-group-spam-marks (group)
(spam-group-ham-marks group t))
(defun spam-group-spam-contents-p (group)
(if (stringp group)
(or (member group spam-junk-mailgroups)
(memq 'gnus-group-spam-classification-spam
(gnus-parameter-spam-contents group)))
nil))
(defun spam-group-ham-contents-p (group)
(if (stringp group)
(memq 'gnus-group-spam-classification-ham
(gnus-parameter-spam-contents group))
nil))
(defvar spam-list-of-processors
'((gnus-group-spam-exit-processor-report-gmane spam spam-use-gmane)
(gnus-group-spam-exit-processor-bogofilter spam spam-use-bogofilter)
(gnus-group-spam-exit-processor-blacklist spam spam-use-blacklist)
(gnus-group-spam-exit-processor-ifile spam spam-use-ifile)
(gnus-group-spam-exit-processor-stat spam spam-use-stat)
(gnus-group-spam-exit-processor-spamoracle spam spam-use-spamoracle)
(gnus-group-ham-exit-processor-ifile ham spam-use-ifile)
(gnus-group-ham-exit-processor-bogofilter ham spam-use-bogofilter)
(gnus-group-ham-exit-processor-stat ham spam-use-stat)
(gnus-group-ham-exit-processor-whitelist ham spam-use-whitelist)
(gnus-group-ham-exit-processor-BBDB ham spam-use-BBDB)
(gnus-group-ham-exit-processor-copy ham spam-use-ham-copy)
(gnus-group-ham-exit-processor-spamoracle ham spam-use-spamoracle))
"The spam-list-of-processors list contains pairs associating a
ham/spam exit processor variable with a classification and a
spam-use-* variable.")
(defun spam-group-processor-p (group processor)
(if (and (stringp group)
(symbolp processor))
(or (member processor (nth 0 (gnus-parameter-spam-process group)))
(spam-group-processor-multiple-p
group
(cdr-safe (assoc processor spam-list-of-processors))))
nil))
(defun spam-group-processor-multiple-p (group processor-info)
(let* ((classification (nth 0 processor-info))
(check (nth 1 processor-info))
(parameters (nth 0 (gnus-parameter-spam-process group)))
found)
(dolist (parameter parameters)
(when (and (null found)
(listp parameter)
(eq classification (nth 0 parameter))
(eq check (nth 1 parameter)))
(setq found t)))
found))
(defun spam-group-spam-processor-report-gmane-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-report-gmane))
(defun spam-group-spam-processor-bogofilter-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-bogofilter))
(defun spam-group-spam-processor-blacklist-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-blacklist))
(defun spam-group-spam-processor-ifile-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-ifile))
(defun spam-group-ham-processor-ifile-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-ifile))
(defun spam-group-spam-processor-spamoracle-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-spamoracle))
(defun spam-group-ham-processor-bogofilter-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-bogofilter))
(defun spam-group-spam-processor-stat-p (group)
(spam-group-processor-p group 'gnus-group-spam-exit-processor-stat))
(defun spam-group-ham-processor-stat-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-stat))
(defun spam-group-ham-processor-whitelist-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-whitelist))
(defun spam-group-ham-processor-BBDB-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-BBDB))
(defun spam-group-ham-processor-copy-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-copy))
(defun spam-group-ham-processor-spamoracle-p (group)
(spam-group-processor-p group 'gnus-group-ham-exit-processor-spamoracle))
;;; Summary entry and exit processing.
(defun spam-summary-prepare ()
(setq spam-old-ham-articles
(spam-list-articles gnus-newsgroup-articles 'ham))
(setq spam-old-spam-articles
(spam-list-articles gnus-newsgroup-articles 'spam))
(spam-mark-junk-as-spam-routine))
;; The spam processors are invoked for any group, spam or ham or neither
(defun spam-summary-prepare-exit ()
(unless gnus-group-is-exiting-without-update-p
(gnus-message 6 "Exiting summary buffer and applying spam rules")
;; first of all, unregister any articles that are no longer ham or spam
;; we have to iterate over the processors, or else we'll be too slow
(dolist (classification '(spam ham))
(let* ((old-articles (if (eq classification 'spam)
spam-old-spam-articles
spam-old-ham-articles))
(new-articles (spam-list-articles
gnus-newsgroup-articles
classification))
(changed-articles (gnus-set-difference old-articles new-articles)))
;; now that we have the changed articles, we go through the processors
(dolist (processor-param spam-list-of-processors)
(let ((processor (nth 0 processor-param))
(processor-classification (nth 1 processor-param))
(check (nth 2 processor-param))
unregister-list)
(dolist (article changed-articles)
(let ((id (spam-fetch-field-message-id-fast article)))
(when (spam-log-unregistration-needed-p
id 'process classification check)
(push article unregister-list))))
;; call spam-register-routine with specific articles to unregister,
;; when there are articles to unregister and the check is enabled
(when (and unregister-list (symbol-value check))
(spam-register-routine classification check t unregister-list))))))
;; find all the spam processors applicable to this group
(dolist (processor-param spam-list-of-processors)
(let ((processor (nth 0 processor-param))
(classification (nth 1 processor-param))
(check (nth 2 processor-param)))
(when (and (eq 'spam classification)
(spam-group-processor-p gnus-newsgroup-name processor))
(spam-register-routine classification check))))
(if spam-move-spam-nonspam-groups-only
(when (not (spam-group-spam-contents-p gnus-newsgroup-name))
(spam-mark-spam-as-expired-and-move-routine
(gnus-parameter-spam-process-destination gnus-newsgroup-name)))
(gnus-message 5 "Marking spam as expired and moving it to %s"
gnus-newsgroup-name)
(spam-mark-spam-as-expired-and-move-routine
(gnus-parameter-spam-process-destination gnus-newsgroup-name)))
;; now we redo spam-mark-spam-as-expired-and-move-routine to only
;; expire spam, in case the above did not expire them
(gnus-message 5 "Marking spam as expired without moving it")
(spam-mark-spam-as-expired-and-move-routine nil)
(when (or (spam-group-ham-contents-p gnus-newsgroup-name)
(and (spam-group-spam-contents-p gnus-newsgroup-name)
spam-process-ham-in-spam-groups)
spam-process-ham-in-nonham-groups)
;; find all the ham processors applicable to this group
(dolist (processor-param spam-list-of-processors)
(let ((processor (nth 0 processor-param))
(classification (nth 1 processor-param))
(check (nth 2 processor-param)))
(when (and (eq 'ham classification)
(spam-group-processor-p gnus-newsgroup-name processor))
(spam-register-routine classification check)))))
(when (spam-group-ham-processor-copy-p gnus-newsgroup-name)
(gnus-message 5 "Copying ham")
(spam-ham-copy-routine
(gnus-parameter-ham-process-destination gnus-newsgroup-name)))
;; now move all ham articles out of spam groups
(when (spam-group-spam-contents-p gnus-newsgroup-name)
(gnus-message 5 "Moving ham messages from spam group")
(spam-ham-move-routine
(gnus-parameter-ham-process-destination gnus-newsgroup-name))))
(setq spam-old-ham-articles nil)
(setq spam-old-spam-articles nil))
(defun spam-mark-junk-as-spam-routine ()
;; check the global list of group names spam-junk-mailgroups and the
;; group parameters
(when (spam-group-spam-contents-p gnus-newsgroup-name)
(gnus-message 5 "Marking %s articles as spam"
(if spam-mark-only-unseen-as-spam
"unseen"
"unread"))
(let ((articles (if spam-mark-only-unseen-as-spam
gnus-newsgroup-unseen
gnus-newsgroup-unreads)))
(dolist (article articles)
(gnus-summary-mark-article article gnus-spam-mark)))))
(defun spam-mark-spam-as-expired-and-move-routine (&rest groups)
(if (and (car-safe groups) (listp (car-safe groups)))
(apply 'spam-mark-spam-as-expired-and-move-routine (car groups))
(gnus-summary-kill-process-mark)
(let ((articles gnus-newsgroup-articles)
(backend-supports-deletions
(gnus-check-backend-function
'request-move-article gnus-newsgroup-name))
article tomove deletep)
(dolist (article articles)
(when (eq (gnus-summary-article-mark article) gnus-spam-mark)
(gnus-summary-mark-article article gnus-expirable-mark)
(push article tomove)))
;; now do the actual copies
(dolist (group groups)
(when (and tomove
(stringp group))
(dolist (article tomove)
(gnus-summary-set-process-mark article))
(when tomove
(if (or (not backend-supports-deletions)
(> (length groups) 1))
(progn
(gnus-summary-copy-article nil group)
(setq deletep t))
(gnus-summary-move-article nil group)))))
;; now delete the articles, if there was a copy done, and the
;; backend allows it
(when (and deletep backend-supports-deletions)
(dolist (article tomove)
(gnus-summary-set-process-mark article))
(when tomove
(let ((gnus-novice-user nil)) ; don't ask me if I'm sure
(gnus-summary-delete-article nil))))
(gnus-summary-yank-process-mark))))
(defun spam-ham-copy-or-move-routine (copy groups)
(gnus-summary-kill-process-mark)
(let ((todo (spam-list-articles gnus-newsgroup-articles 'ham))
(backend-supports-deletions
(gnus-check-backend-function
'request-move-article gnus-newsgroup-name))
(respool-method (gnus-find-method-for-group gnus-newsgroup-name))
article mark todo deletep respool)
(when (member 'respool groups)
(setq respool t) ; boolean for later
(setq groups '("fake"))) ; when respooling, groups are dynamic so fake it
;; now do the actual move
(dolist (group groups)
(when (and todo (stringp group))
(dolist (article todo)
(when spam-mark-ham-unread-before-move-from-spam-group
(gnus-summary-mark-article article gnus-unread-mark))
(gnus-summary-set-process-mark article))
(if respool ; respooling is with a "fake" group
(let ((spam-split-disabled
(or spam-split-disabled
spam-disable-spam-split-during-ham-respool)))
(gnus-summary-respool-article nil respool-method))
(if (or (not backend-supports-deletions) ; else, we are not respooling
(> (length groups) 1))
(progn ; if copying, copy and set deletep
(gnus-summary-copy-article nil group)
(setq deletep t))
(gnus-summary-move-article nil group))))) ; else move articles
;; now delete the articles, unless a) copy is t, and there was a copy done
;; b) a move was done to a single group
;; c) backend-supports-deletions is nil
(unless copy
(when (and deletep backend-supports-deletions)
(dolist (article todo)
(gnus-summary-set-process-mark article))
(when todo
(let ((gnus-novice-user nil)) ; don't ask me if I'm sure
(gnus-summary-delete-article nil))))))
(gnus-summary-yank-process-mark))
(defun spam-ham-copy-routine (&rest groups)
(if (and (car-safe groups) (listp (car-safe groups)))
(apply 'spam-ham-copy-routine (car groups))
(spam-ham-copy-or-move-routine t groups)))
(defun spam-ham-move-routine (&rest groups)
(if (and (car-safe groups) (listp (car-safe groups)))
(apply 'spam-ham-move-routine (car groups))
(spam-ham-copy-or-move-routine nil groups)))
(eval-and-compile
(defalias 'spam-point-at-eol (if (fboundp 'point-at-eol)
'point-at-eol
'line-end-position)))
(defun spam-get-article-as-string (article)
(let ((article-buffer (spam-get-article-as-buffer article))
article-string)
(when article-buffer
(save-window-excursion
(set-buffer article-buffer)
(setq article-string (buffer-string))))
article-string))
(defun spam-get-article-as-buffer (article)
(let ((article-buffer))
(when (numberp article)
(save-window-excursion
(gnus-summary-goto-subject article)
(gnus-summary-show-article t)
(setq article-buffer (get-buffer gnus-article-buffer))))
article-buffer))
;; disabled for now
;; (defun spam-get-article-as-filename (article)
;; (let ((article-filename))
;; (when (numberp article)
;; (nnml-possibly-change-directory
;; (gnus-group-real-name gnus-newsgroup-name))
;; (setq article-filename (expand-file-name
;; (int-to-string article) nnml-current-directory)))
;; (if (file-exists-p article-filename)
;; article-filename
;; nil)))
(defun spam-fetch-field-from-fast (article)
"Fetch the `from' field quickly, using the internal gnus-data-list function"
(if (and (numberp article)
(assoc article (gnus-data-list nil)))
(mail-header-from
(gnus-data-header (assoc article (gnus-data-list nil))))
nil))
(defun spam-fetch-field-subject-fast (article)
"Fetch the `subject' field quickly, using the internal
gnus-data-list function"
(if (and (numberp article)
(assoc article (gnus-data-list nil)))
(mail-header-subject
(gnus-data-header (assoc article (gnus-data-list nil))))
nil))
(defun spam-fetch-field-message-id-fast (article)
"Fetch the `Message-ID' field quickly, using the internal
gnus-data-list function"
(if (and (numberp article)
(assoc article (gnus-data-list nil)))
(mail-header-message-id
(gnus-data-header (assoc article (gnus-data-list nil))))
nil))
;;;; Spam determination.
(defvar spam-list-of-checks
'((spam-use-blacklist . spam-check-blacklist)
(spam-use-regex-headers . spam-check-regex-headers)
(spam-use-regex-body . spam-check-regex-body)
(spam-use-whitelist . spam-check-whitelist)
(spam-use-BBDB . spam-check-BBDB)
(spam-use-ifile . spam-check-ifile)
(spam-use-spamoracle . spam-check-spamoracle)
(spam-use-stat . spam-check-stat)
(spam-use-blackholes . spam-check-blackholes)
(spam-use-hashcash . spam-check-hashcash)
(spam-use-bogofilter-headers . spam-check-bogofilter-headers)
(spam-use-bogofilter . spam-check-bogofilter))
"The spam-list-of-checks list contains pairs associating a
parameter variable with a spam checking function. If the
parameter variable is true, then the checking function is called,
and its value decides what happens. Each individual check may
return nil, t, or a mailgroup name. The value nil means that the
check does not yield a decision, and so, that further checks are
needed. The value t means that the message is definitely not
spam, and that further spam checks should be inhibited.
Otherwise, a mailgroup name or the symbol 'spam (depending on
spam-split-symbolic-return) is returned where the mail should go,
and further checks are also inhibited. The usual mailgroup name
is the value of `spam-split-group', meaning that the message is
definitely a spam.")
(defvar spam-list-of-statistical-checks
'(spam-use-ifile
spam-use-regex-body
spam-use-stat
spam-use-bogofilter
spam-use-spamoracle)
"The spam-list-of-statistical-checks list contains all the mail
splitters that need to have the full message body available.")
;;;TODO: modify to invoke self with each check if invoked without specifics
(defun spam-split (&rest specific-checks)
"Split this message into the `spam' group if it is spam.
This function can be used as an entry in the variable `nnmail-split-fancy',
for example like this: (: spam-split). It can take checks as
parameters. A string as a parameter will set the
spam-split-group to that string.
See the Info node `(gnus)Fancy Mail Splitting' for more details."
(interactive)
(setq spam-split-last-successful-check nil)
(unless spam-split-disabled
(let ((spam-split-group-choice spam-split-group))
(dolist (check specific-checks)
(when (stringp check)
(setq spam-split-group-choice check)
(setq specific-checks (delq check specific-checks))))
(let ((spam-split-group spam-split-group-choice))
(save-excursion
(save-restriction
(dolist (check spam-list-of-statistical-checks)
(when (and (symbolp check) (symbol-value check))
(widen)
(gnus-message 8 "spam-split: widening the buffer (%s requires it)"
(symbol-name check))
(return)))
;; (progn (widen) (debug (buffer-string)))
(let ((list-of-checks spam-list-of-checks)
decision)
(while (and list-of-checks (not decision))
(let ((pair (pop list-of-checks)))
(when (and (symbol-value (car pair))
(or (null specific-checks)
(memq (car pair) specific-checks)))
(gnus-message 5 "spam-split: calling the %s function"
(symbol-name (cdr pair)))
(setq decision (funcall (cdr pair)))
;; if we got a decision at all, save the current check
(when decision
(setq spam-split-last-successful-check (car pair)))
(when (eq decision 'spam)
(if spam-split-symbolic-return
(setq decision spam-split-group)
(gnus-error
5
(format "spam-split got %s but %s is nil"
(symbol-name decision)
(symbol-name spam-split-symbolic-return))))))))
(if (eq decision t)
(if spam-split-symbolic-return-positive 'ham nil)
decision))))))))
(defun spam-find-spam ()
"This function will detect spam in the current newsgroup using spam-split."
(interactive)
(let* ((group gnus-newsgroup-name)
(autodetect (gnus-parameter-spam-autodetect group))
(methods (gnus-parameter-spam-autodetect-methods group))
(first-method (nth 0 methods)))
(when (and autodetect
(not (equal first-method 'none)))
(mapcar
(lambda (article)
(let ((id (spam-fetch-field-message-id-fast article))
(subject (spam-fetch-field-subject-fast article))
(sender (spam-fetch-field-from-fast article)))
(unless (and spam-log-to-registry
(spam-log-registered-p id 'incoming))
(let* ((spam-split-symbolic-return t)
(spam-split-symbolic-return-positive t)
(split-return
(with-temp-buffer
(gnus-request-article-this-buffer
article
group)
(if (or (null first-method)
(equal first-method 'default))
(spam-split)
(apply 'spam-split methods)))))
(if (equal split-return 'spam)
(gnus-summary-mark-article article gnus-spam-mark))
(when (and split-return spam-log-to-registry)
(when (zerop (gnus-registry-group-count id))
(gnus-registry-add-group
id group subject sender))
(spam-log-processing-to-registry
id
'incoming
split-return
spam-split-last-successful-check
group))))))
(if spam-autodetect-recheck-messages
gnus-newsgroup-articles
gnus-newsgroup-unseen)))))
(defvar spam-registration-functions
;; first the ham register, second the spam register function
;; third the ham unregister, fourth the spam unregister function
'((spam-use-blacklist nil
spam-blacklist-register-routine
nil
spam-blacklist-unregister-routine)
(spam-use-whitelist spam-whitelist-register-routine
nil
spam-whitelist-unregister-routine
nil)
(spam-use-BBDB spam-BBDB-register-routine
nil
spam-BBDB-unregister-routine
nil)
(spam-use-ifile spam-ifile-register-ham-routine
spam-ifile-register-spam-routine
spam-ifile-unregister-ham-routine
spam-ifile-unregister-spam-routine)
(spam-use-spamoracle spam-spamoracle-learn-ham
spam-spamoracle-learn-spam
spam-spamoracle-unlearn-ham
spam-spamoracle-unlearn-spam)
(spam-use-stat spam-stat-register-ham-routine
spam-stat-register-spam-routine
spam-stat-unregister-ham-routine
spam-stat-unregister-spam-routine)
;; note that spam-use-gmane is not a legitimate check
(spam-use-gmane nil
spam-report-gmane-register-routine
;; does Gmane support unregistration?
nil
nil)
(spam-use-bogofilter spam-bogofilter-register-ham-routine
spam-bogofilter-register-spam-routine
spam-bogofilter-unregister-ham-routine
spam-bogofilter-unregister-spam-routine))
"The spam-registration-functions list contains pairs
associating a parameter variable with the ham and spam
registration functions, and the ham and spam unregistration
functions")
(defun spam-classification-valid-p (classification)
(or (eq classification 'spam)
(eq classification 'ham)))
(defun spam-process-type-valid-p (process-type)
(or (eq process-type 'incoming)
(eq process-type 'process)))
(defun spam-registration-check-valid-p (check)
(assoc check spam-registration-functions))
(defun spam-unregistration-check-valid-p (check)
(assoc check spam-registration-functions))
(defun spam-registration-function (classification check)
(let ((flist (cdr-safe (assoc check spam-registration-functions))))
(if (eq classification 'spam)
(nth 1 flist)
(nth 0 flist))))
(defun spam-unregistration-function (classification check)
(let ((flist (cdr-safe (assoc check spam-registration-functions))))
(if (eq classification 'spam)
(nth 3 flist)
(nth 2 flist))))
(defun spam-list-articles (articles classification)
(let ((mark-check (if (eq classification 'spam)
'spam-group-spam-mark-p
'spam-group-ham-mark-p))
list mark-cache-yes mark-cache-no)
(dolist (article articles)
(let ((mark (gnus-summary-article-mark article)))
(unless (memq mark mark-cache-no)
(if (memq mark mark-cache-yes)
(push article list)
;; else, we have to actually check the mark
(if (funcall mark-check
gnus-newsgroup-name
mark)
(progn
(push article list)
(push mark mark-cache-yes))
(push mark mark-cache-no))))))
list))
(defun spam-register-routine (classification
check
&optional unregister
specific-articles)
(when (and (spam-classification-valid-p classification)
(spam-registration-check-valid-p check))
(let* ((register-function
(spam-registration-function classification check))
(unregister-function
(spam-unregistration-function classification check))
(run-function (if unregister
unregister-function
register-function))
(log-function (if unregister
'spam-log-undo-registration
'spam-log-processing-to-registry))
article articles)
(when run-function
;; make list of articles, using specific-articles if given
(setq articles (or specific-articles
(spam-list-articles
gnus-newsgroup-articles
classification)))
;; process them
(gnus-message 5 "%s %d %s articles with classification %s, check %s"
(if unregister "Unregistering" "Registering")
(length articles)
(if specific-articles "specific" "")
(symbol-name classification)
(symbol-name check))
(funcall run-function articles)
;; now log all the registrations (or undo them, depending on unregister)
(dolist (article articles)
(funcall log-function
(spam-fetch-field-message-id-fast article)
'process
classification
check
gnus-newsgroup-name))))))
;;; log a ham- or spam-processor invocation to the registry
(defun spam-log-processing-to-registry (id type classification check group)
(when spam-log-to-registry
(if (and (stringp id)
(stringp group)
(spam-process-type-valid-p type)
(spam-classification-valid-p classification)
(spam-registration-check-valid-p check))
(let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
(cell (list classification check group)))
(push cell cell-list)
(gnus-registry-store-extra-entry
id
type
cell-list))
(gnus-message 5 (format "%s called with bad ID, type, classification, check, or group"
"spam-log-processing-to-registry")))))
;;; check if a ham- or spam-processor registration has been done
(defun spam-log-registered-p (id type)
(when spam-log-to-registry
(if (and (stringp id)
(spam-process-type-valid-p type))
(cdr-safe (gnus-registry-fetch-extra id type))
(progn
(gnus-message 5 (format "%s called with bad ID, type, classification, or check"
"spam-log-registered-p"))
nil))))
;;; check if a ham- or spam-processor registration needs to be undone
(defun spam-log-unregistration-needed-p (id type classification check)
(when spam-log-to-registry
(if (and (stringp id)
(spam-process-type-valid-p type)
(spam-classification-valid-p classification)
(spam-registration-check-valid-p check))
(let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
found)
(dolist (cell cell-list)
(unless found
(when (and (eq classification (nth 0 cell))
(eq check (nth 1 cell)))
(setq found t))))
found)
(progn
(gnus-message 5 (format "%s called with bad ID, type, classification, or check"
"spam-log-unregistration-needed-p"))
nil))))
;;; undo a ham- or spam-processor registration (the group is not used)
(defun spam-log-undo-registration (id type classification check &optional group)
(when (and spam-log-to-registry
(spam-log-unregistration-needed-p id type classification check))
(if (and (stringp id)
(spam-process-type-valid-p type)
(spam-classification-valid-p classification)
(spam-registration-check-valid-p check))
(let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
new-cell-list found)
(dolist (cell cell-list)
(unless (and (eq classification (nth 0 cell))
(eq check (nth 1 cell)))
(push cell new-cell-list)))
(gnus-registry-store-extra-entry
id
type
new-cell-list))
(progn
(gnus-message 5 (format "%s called with bad ID, type, check, or group"
"spam-log-undo-registration"))
nil))))
;;; set up IMAP widening if it's necessary
(defun spam-setup-widening ()
(dolist (check spam-list-of-statistical-checks)
(when (symbol-value check)
(setq nnimap-split-download-body-default t))))
;;;; Regex body
(defun spam-check-regex-body ()
(let ((spam-regex-headers-ham spam-regex-body-ham)
(spam-regex-headers-spam spam-regex-body-spam))
(spam-check-regex-headers t)))
;;;; Regex headers
(defun spam-check-regex-headers (&optional body)
(let ((type (if body "body" "header"))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group))
ret found)
(dolist (h-regex spam-regex-headers-ham)
(unless found
(goto-char (point-min))
(when (re-search-forward h-regex nil t)
(message "Ham regex %s search positive." type)
(setq found t))))
(dolist (s-regex spam-regex-headers-spam)
(unless found
(goto-char (point-min))
(when (re-search-forward s-regex nil t)
(message "Spam regex %s search positive." type)
(setq found t)
(setq ret spam-split-group))))
ret))
;;;; Blackholes.
(defun spam-reverse-ip-string (ip)
(when (stringp ip)
(mapconcat 'identity
(nreverse (split-string ip "\\."))
".")))
(defun spam-check-blackholes ()
"Check the Received headers for blackholed relays."
(let ((headers (nnmail-fetch-field "received"))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group))
ips matches)
(when headers
(with-temp-buffer
(insert headers)
(goto-char (point-min))
(gnus-message 5 "Checking headers for relay addresses")
(while (re-search-forward
"\\([0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+\\)" nil t)
(gnus-message 9 "Blackhole search found host IP %s." (match-string 1))
(push (spam-reverse-ip-string (match-string 1))
ips)))
(dolist (server spam-blackhole-servers)
(dolist (ip ips)
(unless (and spam-blackhole-good-server-regex
;; match the good-server-regex against the reversed (again) IP string
(string-match
spam-blackhole-good-server-regex
(spam-reverse-ip-string ip)))
(unless matches
(let ((query-string (concat ip "." server)))
(if spam-use-dig
(let ((query-result (query-dig query-string)))
(when query-result
(gnus-message 5 "(DIG): positive blackhole check '%s'"
query-result)
(push (list ip server query-result)
matches)))
;; else, if not using dig.el
(when (query-dns query-string)
(gnus-message 5 "positive blackhole check")
(push (list ip server (query-dns query-string 'TXT))
matches)))))))))
(when matches
spam-split-group)))
;;;; Hashcash.
(eval-when-compile
(autoload 'mail-check-payment "hashcash"))
(condition-case nil
(progn
(require 'hashcash)
(defun spam-check-hashcash ()
"Check the headers for hashcash payments."
(mail-check-payment))) ;mail-check-payment returns a boolean
(file-error))
;;;; BBDB
;;; original idea for spam-check-BBDB from Alexander Kotelnikov
;;; <sacha@giotto.sj.ru>
;; all this is done inside a condition-case to trap errors
(eval-when-compile
(autoload 'bbdb-buffer "bbdb")
(autoload 'bbdb-create-internal "bbdb")
(autoload 'bbdb-search-simple "bbdb"))
(eval-and-compile
(when (condition-case nil
(progn
(require 'bbdb)
(require 'bbdb-com))
(file-error
(defalias 'spam-BBDB-register-routine 'ignore)
(defalias 'spam-enter-ham-BBDB 'ignore)
nil))
(defun spam-enter-ham-BBDB (addresses &optional remove)
"Enter an address into the BBDB; implies ham (non-spam) sender"
(dolist (from addresses)
(when (stringp from)
(let* ((parsed-address (gnus-extract-address-components from))
(name (or (nth 0 parsed-address) "Ham Sender"))
(remove-function (if remove
'bbdb-delete-record-internal
'ignore))
(net-address (nth 1 parsed-address))
(record (and net-address
(bbdb-search-simple nil net-address))))
(when net-address
(gnus-message 5 "%s address %s %s BBDB"
(if remove "Deleting" "Adding")
from
(if remove "from" "to"))
(if record
(funcall remove-function record)
(bbdb-create-internal name nil net-address nil nil
"ham sender added by spam.el")))))))
(defun spam-BBDB-register-routine (articles &optional unregister)
(let (addresses)
(dolist (article articles)
(when (stringp (spam-fetch-field-from-fast article))
(push (spam-fetch-field-from-fast article) addresses)))
;; now do the register/unregister action
(spam-enter-ham-BBDB addresses unregister)))
(defun spam-BBDB-unregister-routine (articles)
(spam-BBDB-register-routine articles t))
(defun spam-check-BBDB ()
"Mail from people in the BBDB is classified as ham or non-spam"
(let ((who (nnmail-fetch-field "from"))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group)))
(when who
(setq who (nth 1 (gnus-extract-address-components who)))
(if (bbdb-search-simple nil who)
t
(if spam-use-BBDB-exclusive
spam-split-group
nil)))))))
;;;; ifile
;;; check the ifile backend; return nil if the mail was NOT classified
;;; as spam
(defun spam-get-ifile-database-parameter ()
"Get the command-line parameter for ifile's database from
spam-ifile-database-path."
(if spam-ifile-database-path
(format "--db-file=%s" spam-ifile-database-path)
nil))
(defun spam-check-ifile ()
"Check the ifile backend for the classification of this message."
(let ((article-buffer-name (buffer-name))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group))
category return)
(with-temp-buffer
(let ((temp-buffer-name (buffer-name))
(db-param (spam-get-ifile-database-parameter)))
(save-excursion
(set-buffer article-buffer-name)
(apply 'call-process-region
(point-min) (point-max) spam-ifile-path
nil temp-buffer-name nil "-c"
(if db-param `(,db-param "-q") `("-q"))))
;; check the return now (we're back in the temp buffer)
(goto-char (point-min))
(if (not (eobp))
(setq category (buffer-substring (point) (spam-point-at-eol))))
(when (not (zerop (length category))) ; we need a category here
(if spam-ifile-all-categories
(setq return category)
;; else, if spam-ifile-all-categories is not set...
(when (string-equal spam-ifile-spam-category category)
(setq return spam-split-group)))))) ; note return is nil otherwise
return))
(defun spam-ifile-register-with-ifile (articles category &optional unregister)
"Register an article, given as a string, with a category.
Uses `gnus-newsgroup-name' if category is nil (for ham registration)."
(let ((category (or category gnus-newsgroup-name))
(add-or-delete-option (if unregister "-d" "-i"))
(db (spam-get-ifile-database-parameter))
parameters)
(with-temp-buffer
(dolist (article articles)
(let ((article-string (spam-get-article-as-string article)))
(when (stringp article-string)
(insert article-string))))
(apply 'call-process-region
(point-min) (point-max) spam-ifile-path
nil nil nil
add-or-delete-option category
(if db `(,db "-h") `("-h"))))))
(defun spam-ifile-register-spam-routine (articles &optional unregister)
(spam-ifile-register-with-ifile articles spam-ifile-spam-category unregister))
(defun spam-ifile-unregister-spam-routine (articles)
(spam-ifile-register-spam-routine articles t))
(defun spam-ifile-register-ham-routine (articles &optional unregister)
(spam-ifile-register-with-ifile articles spam-ifile-ham-category unregister))
(defun spam-ifile-unregister-ham-routine (articles)
(spam-ifile-register-ham-routine articles t))
;;;; spam-stat
(eval-when-compile
(autoload 'spam-stat-buffer-change-to-non-spam "spam-stat")
(autoload 'spam-stat-buffer-change-to-spam "spam-stat")
(autoload 'spam-stat-buffer-is-non-spam "spam-stat")
(autoload 'spam-stat-buffer-is-spam "spam-stat")
(autoload 'spam-stat-load "spam-stat")
(autoload 'spam-stat-save "spam-stat")
(autoload 'spam-stat-split-fancy "spam-stat"))
(eval-and-compile
(when (condition-case nil
(let ((spam-stat-install-hooks nil))
(require 'spam-stat))
(file-error
(defalias 'spam-stat-register-ham-routine 'ignore)
(defalias 'spam-stat-register-spam-routine 'ignore)
nil))
(defun spam-check-stat ()
"Check the spam-stat backend for the classification of this message"
(let ((spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group))
(spam-stat-split-fancy-spam-group spam-split-group) ; override
(spam-stat-buffer (buffer-name)) ; stat the current buffer
category return)
(spam-stat-split-fancy)))
(defun spam-stat-register-spam-routine (articles &optional unregister)
(dolist (article articles)
(let ((article-string (spam-get-article-as-string article)))
(with-temp-buffer
(insert article-string)
(if unregister
(spam-stat-buffer-change-to-non-spam)
(spam-stat-buffer-is-spam))))))
(defun spam-stat-unregister-spam-routine (articles)
(spam-stat-register-spam-routine articles t))
(defun spam-stat-register-ham-routine (articles &optional unregister)
(dolist (article articles)
(let ((article-string (spam-get-article-as-string article)))
(with-temp-buffer
(insert article-string)
(if unregister
(spam-stat-buffer-change-to-spam)
(spam-stat-buffer-is-non-spam))))))
(defun spam-stat-unregister-ham-routine (articles)
(spam-stat-register-ham-routine articles t))
(defun spam-maybe-spam-stat-load ()
(when spam-use-stat (spam-stat-load)))
(defun spam-maybe-spam-stat-save ()
(when spam-use-stat (spam-stat-save)))))
;;;; Blacklists and whitelists.
(defvar spam-whitelist-cache nil)
(defvar spam-blacklist-cache nil)
(defun spam-kill-whole-line ()
(beginning-of-line)
(let ((kill-whole-line t))
(kill-line)))
;;; address can be a list, too
(defun spam-enter-whitelist (address &optional remove)
"Enter ADDRESS (list or single) into the whitelist.
With a non-nil REMOVE, remove them."
(interactive "sAddress: ")
(spam-enter-list address spam-whitelist remove)
(setq spam-whitelist-cache nil))
;;; address can be a list, too
(defun spam-enter-blacklist (address &optional remove)
"Enter ADDRESS (list or single) into the blacklist.
With a non-nil REMOVE, remove them."
(interactive "sAddress: ")
(spam-enter-list address spam-blacklist remove)
(setq spam-blacklist-cache nil))
(defun spam-enter-list (addresses file &optional remove)
"Enter ADDRESSES into the given FILE.
Either the whitelist or the blacklist files can be used. With
REMOVE not nil, remove the ADDRESSES."
(if (stringp addresses)
(spam-enter-list (list addresses) file remove)
;; else, we have a list of addresses here
(unless (file-exists-p (file-name-directory file))
(make-directory (file-name-directory file) t))
(save-excursion
(set-buffer
(find-file-noselect file))
(dolist (a addresses)
(when (stringp a)
(goto-char (point-min))
(if (re-search-forward (regexp-quote a) nil t)
;; found the address
(when remove
(spam-kill-whole-line))
;; else, the address was not found
(unless remove
(goto-char (point-max))
(unless (bobp)
(insert "\n"))
(insert a "\n")))))
(save-buffer))))
;;; returns t if the sender is in the whitelist, nil or
;;; spam-split-group otherwise
(defun spam-check-whitelist ()
;; FIXME! Should it detect when file timestamps change?
(let ((spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group)))
(unless spam-whitelist-cache
(setq spam-whitelist-cache (spam-parse-list spam-whitelist)))
(if (spam-from-listed-p spam-whitelist-cache)
t
(if spam-use-whitelist-exclusive
spam-split-group
nil))))
(defun spam-check-blacklist ()
;; FIXME! Should it detect when file timestamps change?
(let ((spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group)))
(unless spam-blacklist-cache
(setq spam-blacklist-cache (spam-parse-list spam-blacklist)))
(and (spam-from-listed-p spam-blacklist-cache) spam-split-group)))
(defun spam-parse-list (file)
(when (file-readable-p file)
(let (contents address)
(with-temp-buffer
(insert-file-contents file)
(while (not (eobp))
(setq address (buffer-substring (point) (spam-point-at-eol)))
(forward-line 1)
;; insert the e-mail address if detected, otherwise the raw data
(unless (zerop (length address))
(let ((pure-address (nth 1 (gnus-extract-address-components address))))
(push (or pure-address address) contents)))))
(nreverse contents))))
(defun spam-from-listed-p (cache)
(let ((from (nnmail-fetch-field "from"))
found)
(while cache
(let ((address (pop cache)))
(unless (zerop (length address)) ; 0 for a nil address too
(setq address (regexp-quote address))
;; fix regexp-quote's treatment of user-intended regexes
(while (string-match "\\\\\\*" address)
(setq address (replace-match ".*" t t address))))
(when (and address (string-match address from))
(setq found t
cache nil))))
found))
(defun spam-filelist-register-routine (articles blacklist &optional unregister)
(let ((de-symbol (if blacklist 'spam-use-whitelist 'spam-use-blacklist))
(declassification (if blacklist 'ham 'spam))
(enter-function
(if blacklist 'spam-enter-blacklist 'spam-enter-whitelist))
(remove-function
(if blacklist 'spam-enter-whitelist 'spam-enter-blacklist))
from addresses unregister-list)
(dolist (article articles)
(let ((from (spam-fetch-field-from-fast article))
(id (spam-fetch-field-message-id-fast article))
sender-ignored)
(when (stringp from)
(dolist (ignore-regex spam-blacklist-ignored-regexes)
(when (and (not sender-ignored)
(stringp ignore-regex)
(string-match ignore-regex from))
(setq sender-ignored t)))
;; remember the messages we need to unregister, unless remove is set
(when (and
(null unregister)
(spam-log-unregistration-needed-p
id 'process declassification de-symbol))
(push from unregister-list))
(unless sender-ignored
(push from addresses)))))
(if unregister
(funcall enter-function addresses t) ; unregister all these addresses
;; else, register normally and unregister what we need to
(funcall remove-function unregister-list t)
(dolist (article unregister-list)
(spam-log-undo-registration
(spam-fetch-field-message-id-fast article)
'process
declassification
de-symbol))
(funcall enter-function addresses nil))))
(defun spam-blacklist-unregister-routine (articles)
(spam-blacklist-register-routine articles t))
(defun spam-blacklist-register-routine (articles &optional unregister)
(spam-filelist-register-routine articles t unregister))
(defun spam-whitelist-unregister-routine (articles)
(spam-whitelist-register-routine articles t))
(defun spam-whitelist-register-routine (articles &optional unregister)
(spam-filelist-register-routine articles nil unregister))
;;;; Spam-report glue
(defun spam-report-gmane-register-routine (articles)
(when articles
(apply 'spam-report-gmane articles)))
;;;; Bogofilter
(defun spam-check-bogofilter-headers (&optional score)
(let ((header (nnmail-fetch-field spam-bogofilter-header))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group)))
(when header ; return nil when no header
(if score ; scoring mode
(if (string-match "spamicity=\\([0-9.]+\\)" header)
(match-string 1 header)
"0")
;; spam detection mode
(when (string-match spam-bogofilter-bogosity-positive-spam-header
header)
spam-split-group)))))
;; return something sensible if the score can't be determined
(defun spam-bogofilter-score ()
"Get the Bogofilter spamicity score"
(interactive)
(save-window-excursion
(gnus-summary-show-article t)
(set-buffer gnus-article-buffer)
(let ((score (or (spam-check-bogofilter-headers t)
(spam-check-bogofilter t))))
(message "Spamicity score %s" score)
(or score "0"))
(gnus-summary-show-article)))
(defun spam-check-bogofilter (&optional score)
"Check the Bogofilter backend for the classification of this message"
(let ((article-buffer-name (buffer-name))
(db spam-bogofilter-database-directory)
return)
(with-temp-buffer
(let ((temp-buffer-name (buffer-name)))
(save-excursion
(set-buffer article-buffer-name)
(apply 'call-process-region
(point-min) (point-max)
spam-bogofilter-path
nil temp-buffer-name nil
(if db `("-d" ,db "-v") `("-v"))))
(setq return (spam-check-bogofilter-headers score))))
return))
(defun spam-bogofilter-register-with-bogofilter (articles
spam
&optional unregister)
"Register an article, given as a string, as spam or non-spam."
(dolist (article articles)
(let ((article-string (spam-get-article-as-string article))
(db spam-bogofilter-database-directory)
(switch (if unregister
(if spam
spam-bogofilter-spam-strong-switch
spam-bogofilter-ham-strong-switch)
(if spam
spam-bogofilter-spam-switch
spam-bogofilter-ham-switch))))
(when (stringp article-string)
(with-temp-buffer
(insert article-string)
(apply 'call-process-region
(point-min) (point-max)
spam-bogofilter-path
nil nil nil switch
(if db `("-d" ,db "-v") `("-v"))))))))
(defun spam-bogofilter-register-spam-routine (articles &optional unregister)
(spam-bogofilter-register-with-bogofilter articles t unregister))
(defun spam-bogofilter-unregister-spam-routine (articles)
(spam-bogofilter-register-spam-routine articles t))
(defun spam-bogofilter-register-ham-routine (articles &optional unregister)
(spam-bogofilter-register-with-bogofilter articles nil unregister))
(defun spam-bogofilter-unregister-ham-routine (articles)
(spam-bogofilter-register-ham-routine articles t))
;;;; spamoracle
(defun spam-check-spamoracle ()
"Run spamoracle on an article to determine whether it's spam."
(let ((article-buffer-name (buffer-name))
(spam-split-group (if spam-split-symbolic-return
'spam
spam-split-group)))
(with-temp-buffer
(let ((temp-buffer-name (buffer-name)))
(save-excursion
(set-buffer article-buffer-name)
(let ((status
(apply 'call-process-region
(point-min) (point-max)
spam-spamoracle-binary
nil temp-buffer-name nil
(if spam-spamoracle-database
`("-f" ,spam-spamoracle-database "mark")
'("mark")))))
(if (eq 0 status)
(progn
(set-buffer temp-buffer-name)
(goto-char (point-min))
(when (re-search-forward "^X-Spam: yes;" nil t)
spam-split-group))
(error "Error running spamoracle: %s" status))))))))
(defun spam-spamoracle-learn (articles article-is-spam-p &optional unregister)
"Run spamoracle in training mode."
(with-temp-buffer
(let ((temp-buffer-name (buffer-name)))
(save-excursion
(goto-char (point-min))
(dolist (article articles)
(insert (spam-get-article-as-string article)))
(let* ((arg (if (spam-xor unregister article-is-spam-p)
"-spam"
"-good"))
(status
(apply 'call-process-region
(point-min) (point-max)
spam-spamoracle-binary
nil temp-buffer-name nil
(if spam-spamoracle-database
`("-f" ,spam-spamoracle-database
"add" ,arg)
`("add" ,arg)))))
(unless (eq 0 status)
(error "Error running spamoracle: %s" status)))))))
(defun spam-spamoracle-learn-ham (articles &optional unregister)
(spam-spamoracle-learn articles nil unregister))
(defun spam-spamoracle-unlearn-ham (articles &optional unregister)
(spam-spamoracle-learn-ham articles t))
(defun spam-spamoracle-learn-spam (articles &optional unregister)
(spam-spamoracle-learn articles t unregister))
(defun spam-spamoracle-unlearn-spam (articles &optional unregister)
(spam-spamoracle-learn-spam articles t))
;;;; Hooks
;;;###autoload
(defun spam-initialize ()
"Install the spam.el hooks and do other initialization"
(interactive)
(setq spam-install-hooks t)
;; TODO: How do we redo this every time the `spam' face is customized?
(push '((eq mark gnus-spam-mark) . spam)
gnus-summary-highlight)
;; Add hooks for loading and saving the spam stats
(add-hook 'gnus-save-newsrc-hook 'spam-maybe-spam-stat-save)
(add-hook 'gnus-get-top-new-news-hook 'spam-maybe-spam-stat-load)
(add-hook 'gnus-startup-hook 'spam-maybe-spam-stat-load)
(add-hook 'gnus-summary-prepare-exit-hook 'spam-summary-prepare-exit)
(add-hook 'gnus-summary-prepare-hook 'spam-summary-prepare)
(add-hook 'gnus-get-new-news-hook 'spam-setup-widening)
(add-hook 'gnus-summary-prepare-hook 'spam-find-spam))
(defun spam-unload-hook ()
"Uninstall the spam.el hooks"
(interactive)
(remove-hook 'gnus-save-newsrc-hook 'spam-maybe-spam-stat-save)
(remove-hook 'gnus-get-top-new-news-hook 'spam-maybe-spam-stat-load)
(remove-hook 'gnus-startup-hook 'spam-maybe-spam-stat-load)
(remove-hook 'gnus-summary-prepare-exit-hook 'spam-summary-prepare-exit)
(remove-hook 'gnus-summary-prepare-hook 'spam-summary-prepare)
(remove-hook 'gnus-get-new-news-hook 'spam-setup-widening)
(remove-hook 'gnus-summary-prepare-hook 'spam-find-spam))
(add-hook 'spam-unload-hook 'spam-unload-hook)
(when spam-install-hooks
(spam-initialize))
(provide 'spam)
;;; arch-tag: 07e6e0ca-ab0a-4412-b445-1f6c72a4f27f
;;; spam.el ends here