lisp/gnus/spam.el

   1 ;;; spam.el --- Identifying spam
   2
   3 ;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Maintainer: Ted Zlatanov <tzz@lifelogs.com>
   7 ;; Keywords: network, spam, mail, bogofilter, BBDB, dspam, dig, whitelist, blacklist, gmane, hashcash, spamassassin, bsfilter, ifile, stat, crm114, spamoracle
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;;; This module addresses a few aspects of spam control under Gnus.  Page
  29 ;;; breaks are used for grouping declarations and documentation relating to
  30 ;;; each particular aspect.
  31
  32 ;;; The integration with Gnus is not yet complete.  See various `FIXME'
  33 ;;; comments, below, for supplementary explanations or discussions.
  34
  35 ;;; Several TODO items are marked as such
  36
  37 ;; TODO: cross-server splitting, remote processing, training through files
  38
  39 ;;; Code:
  40
  41 ;;{{{ compilation directives and autoloads/requires
  42
  43 (eval-when-compile (require 'cl))
  44 (eval-when-compile (require 'spam-report))
  45 (eval-when-compile (require 'hashcash))
  46
  47 (require 'gnus-sum)
  48
  49 (require 'gnus-uu)                      ; because of key prefix issues
  50 ;;; for the definitions of group content classification and spam processors
  51 (require 'gnus)
  52 (require 'message)              ;for the message-fetch-field functions
  53
  54 ;; for nnimap-split-download-body-default
  55 (eval-when-compile (require 'nnimap))
  56
  57 ;; autoload query-dig
  58 (eval-and-compile
  59   (autoload 'query-dig "dig"))
  60
  61 ;; autoload spam-report
  62 (eval-and-compile
  63   (autoload 'spam-report-gmane "spam-report")
  64   (autoload 'spam-report-gmane-spam "spam-report")
  65   (autoload 'spam-report-gmane-ham "spam-report")
  66   (autoload 'spam-report-resend "spam-report"))
  67
  68 ;; autoload gnus-registry
  69 (eval-and-compile
  70   (autoload 'gnus-registry-group-count "gnus-registry")
  71   (autoload 'gnus-registry-add-group "gnus-registry")
  72   (autoload 'gnus-registry-store-extra-entry "gnus-registry")
  73   (autoload 'gnus-registry-fetch-extra "gnus-registry"))
  74
  75 ;; autoload query-dns
  76 (eval-and-compile
  77   (autoload 'query-dns "dns"))
  78
  79 ;;}}}
  80
  81 ;;{{{ Main parameters.
  82 (defvar spam-backends nil
  83   "List of spam.el backends with all the pertinent data.
  84 Populated by `spam-install-backend-super'.")
  85
  86 (defgroup spam nil
  87   "Spam configuration."
  88   :version "22.1"
  89   :group 'mail
  90   :group 'news)
  91
  92 (defcustom spam-summary-exit-behavior 'default
  93   "Exit behavior at the time of summary exit.
  94 Note that setting the `spam-use-move' or `spam-use-copy' backends on
  95 a group through group/topic parameters overrides this mechanism."
  96   :type '(choice (const 'default :tag
  97                         "Move spam out of all groups.  Move ham out of spam groups.")
  98                  (const 'move-all :tag
  99                         "Move spam out of all groups.  Move ham out of all groups.")
 100                  (const 'move-none :tag
 101                         "Never move spam or ham out of any groups."))
 102   :group 'spam)
 103
 104 (defcustom spam-directory (nnheader-concat gnus-directory "spam/")
 105   "Directory for spam whitelists and blacklists."
 106   :type 'directory
 107   :group 'spam)
 108
 109 (defcustom spam-mark-new-messages-in-spam-group-as-spam t
 110   "Whether new messages in a spam group should get the spam-mark."
 111   :type 'boolean
 112   ;; :version "22.1" ;; Gnus 5.10.8 / No Gnus 0.3
 113   :group 'spam)
 114
 115 (defcustom spam-log-to-registry nil
 116   "Whether spam/ham processing should be logged in the registry."
 117   :type 'boolean
 118   :group 'spam)
 119
 120 (defcustom spam-split-symbolic-return nil
 121   "Whether `spam-split' should work with symbols or group names."
 122   :type 'boolean
 123   :group 'spam)
 124
 125 (defcustom spam-split-symbolic-return-positive nil
 126   "Whether `spam-split' should ALWAYS work with symbols or group names.
 127 Do not set this if you use `spam-split' in a fancy split method."
 128   :type 'boolean
 129   :group 'spam)
 130
 131 (defcustom spam-mark-only-unseen-as-spam t
 132   "Whether only unseen articles should be marked as spam in spam groups.
 133 When nil, all unread articles in a spam group are marked as
 134 spam.  Set this if you want to leave an article unread in a spam group
 135 without losing it to the automatic spam-marking process."
 136   :type 'boolean
 137   :group 'spam)
 138
 139 (defcustom spam-mark-ham-unread-before-move-from-spam-group nil
 140   "Whether ham should be marked unread before it's moved.
 141 The article is moved out of a spam group according to `ham-process-destination'.
 142 This variable is an official entry in the international Longest Variable Name
 143 Competition."
 144   :type 'boolean
 145   :group 'spam)
 146
 147 (defcustom spam-disable-spam-split-during-ham-respool nil
 148   "Whether `spam-split' should be ignored while resplitting ham.
 149 This is useful to prevent ham from ending up in the same spam
 150 group after the resplit.  Don't set this to t if you have `spam-split' as the
 151 last rule in your split configuration."
 152   :type 'boolean
 153   :group 'spam)
 154
 155 (defcustom spam-autodetect-recheck-messages nil
 156   "Should spam.el recheck all meessages when autodetecting?
 157 Normally this is nil, so only unseen messages will be checked."
 158   :type 'boolean
 159   :group 'spam)
 160
 161 (defcustom spam-whitelist (expand-file-name "whitelist" spam-directory)
 162   "The location of the whitelist.
 163 The file format is one regular expression per line.
 164 The regular expression is matched against the address."
 165   :type 'file
 166   :group 'spam)
 167
 168 (defcustom spam-blacklist (expand-file-name "blacklist" spam-directory)
 169   "The location of the blacklist.
 170 The file format is one regular expression per line.
 171 The regular expression is matched against the address."
 172   :type 'file
 173   :group 'spam)
 174
 175 (defcustom spam-use-dig t
 176   "Whether `query-dig' should be used instead of `query-dns'."
 177   :type 'boolean
 178   :group 'spam)
 179
 180 (defcustom spam-use-gmane-xref nil
 181   "Whether the Gmane spam xref should be used by `spam-split'."
 182   :type 'boolean
 183   :group 'spam)
 184
 185 (defcustom spam-use-blacklist nil
 186   "Whether the blacklist should be used by `spam-split'."
 187   :type 'boolean
 188   :group 'spam)
 189
 190 (defcustom spam-blacklist-ignored-regexes nil
 191   "Regular expressions that the blacklist should ignore."
 192   :type '(repeat (regexp :tag "Regular expression to ignore when blacklisting"))
 193   :group 'spam)
 194
 195 (defcustom spam-use-whitelist nil
 196   "Whether the whitelist should be used by `spam-split'."
 197   :type 'boolean
 198   :group 'spam)
 199
 200 (defcustom spam-use-whitelist-exclusive nil
 201   "Whether whitelist-exclusive should be used by `spam-split'.
 202 Exclusive whitelisting means that all messages from senders not in the whitelist
 203 are considered spam."
 204   :type 'boolean
 205   :group 'spam)
 206
 207 (defcustom spam-use-blackholes nil
 208   "Whether blackholes should be used by `spam-split'."
 209   :type 'boolean
 210   :group 'spam)
 211
 212 (defcustom spam-use-hashcash nil
 213   "Whether hashcash payments should be detected by `spam-split'."
 214   :type 'boolean
 215   :group 'spam)
 216
 217 (defcustom spam-use-regex-headers nil
 218   "Whether a header regular expression match should be used by `spam-split'.
 219 Also see the variables `spam-regex-headers-spam' and `spam-regex-headers-ham'."
 220   :type 'boolean
 221   :group 'spam)
 222
 223 (defcustom spam-use-regex-body nil
 224   "Whether a body regular expression match should be used by `spam-split'.
 225 Also see the variables `spam-regex-body-spam' and `spam-regex-body-ham'."
 226   :type 'boolean
 227   :group 'spam)
 228
 229 (defcustom spam-use-bogofilter-headers nil
 230   "Whether bogofilter headers should be used by `spam-split'.
 231 Enable this if you pre-process messages with Bogofilter BEFORE Gnus sees them."
 232   :type 'boolean
 233   :group 'spam)
 234
 235 (defcustom spam-use-bogofilter nil
 236   "Whether bogofilter should be invoked by `spam-split'.
 237 Enable this if you want Gnus to invoke Bogofilter on new messages."
 238   :type 'boolean
 239   :group 'spam)
 240
 241 (defcustom spam-use-bsfilter-headers nil
 242   "Whether bsfilter headers should be used by `spam-split'.
 243 Enable this if you pre-process messages with Bsfilter BEFORE Gnus sees them."
 244   :type 'boolean
 245   :group 'spam)
 246
 247 (defcustom spam-use-bsfilter nil
 248   "Whether bsfilter should be invoked by `spam-split'.
 249 Enable this if you want Gnus to invoke Bsfilter on new messages."
 250   :type 'boolean
 251   :group 'spam)
 252
 253 (defcustom spam-use-BBDB nil
 254   "Whether BBDB should be used by `spam-split'."
 255   :type 'boolean
 256   :group 'spam)
 257
 258 (defcustom spam-use-BBDB-exclusive nil
 259   "Whether BBDB-exclusive should be used by `spam-split'.
 260 Exclusive BBDB means that all messages from senders not in the BBDB are
 261 considered spam."
 262   :type 'boolean
 263   :group 'spam)
 264
 265 (defcustom spam-use-ifile nil
 266   "Whether ifile should be used by `spam-split'."
 267   :type 'boolean
 268   :group 'spam)
 269
 270 (defcustom spam-use-stat nil
 271   "Whether `spam-stat' should be used by `spam-split'."
 272   :type 'boolean
 273   :group 'spam)
 274
 275 (defcustom spam-use-spamoracle nil
 276   "Whether spamoracle should be used by `spam-split'."
 277   :type 'boolean
 278   :group 'spam)
 279
 280 (defcustom spam-use-spamassassin nil
 281   "Whether spamassassin should be invoked by `spam-split'.
 282 Enable this if you want Gnus to invoke SpamAssassin on new messages."
 283   :type 'boolean
 284   :group 'spam)
 285
 286 (defcustom spam-use-spamassassin-headers nil
 287   "Whether spamassassin headers should be checked by `spam-split'.
 288 Enable this if you pre-process messages with SpamAssassin BEFORE Gnus sees
 289 them."
 290   :type 'boolean
 291   :group 'spam)
 292
 293 (defcustom spam-use-crm114 nil
 294   "Whether the CRM114 Mailfilter should be used by `spam-split'."
 295   :type 'boolean
 296   :group 'spam)
 297
 298 (defcustom spam-install-hooks (or
 299                                spam-use-dig
 300                                spam-use-gmane-xref
 301                                spam-use-blacklist
 302                                spam-use-whitelist
 303                                spam-use-whitelist-exclusive
 304                                spam-use-blackholes
 305                                spam-use-hashcash
 306                                spam-use-regex-headers
 307                                spam-use-regex-body
 308                                spam-use-bogofilter
 309                                spam-use-bogofilter-headers
 310                                spam-use-spamassassin
 311                                spam-use-spamassassin-headers
 312                                spam-use-bsfilter
 313                                spam-use-bsfilter-headers
 314                                spam-use-BBDB
 315                                spam-use-BBDB-exclusive
 316                                spam-use-ifile
 317                                spam-use-stat
 318                                spam-use-spamoracle
 319                                spam-use-crm114)
 320   "Whether the spam hooks should be installed.
 321 Default to t if one of the spam-use-* variables is set."
 322   :group 'spam
 323   :type 'boolean)
 324
 325 (defcustom spam-split-group "spam"
 326   "Group name where incoming spam should be put by `spam-split'."
 327   :type 'string
 328   :group 'spam)
 329
 330 ;;; TODO: deprecate this variable, it's confusing since it's a list of strings,
 331 ;;; not regular expressions
 332 (defcustom spam-junk-mailgroups (cons
 333                                  spam-split-group
 334                                  '("mail.junk" "poste.pourriel"))
 335   "Mailgroups with spam contents.
 336 All unmarked article in such group receive the spam mark on group entry."
 337   :type '(repeat (string :tag "Group"))
 338   :group 'spam)
 339
 340
 341 (defcustom spam-gmane-xref-spam-group "gmane.spam.detected"
 342   "The group where spam xrefs can be found on Gmane.
 343 Only meaningful if you enable `spam-use-gmane-xref'."
 344   :type 'string
 345   :group 'spam)
 346
 347 (defcustom spam-blackhole-servers '("bl.spamcop.net" "relays.ordb.org"
 348                                     "dev.null.dk" "relays.visi.com")
 349   "List of blackhole servers.
 350 Only meaningful if you enable `spam-use-blackholes'."
 351   :type '(repeat (string :tag "Server"))
 352   :group 'spam)
 353
 354 (defcustom spam-blackhole-good-server-regex nil
 355   "String matching IP addresses that should not be checked in the blackholes.
 356 Only meaningful if you enable `spam-use-blackholes'."
 357   :type '(radio (const nil) regexp)
 358   :group 'spam)
 359
 360 (defface spam
 361   '((((class color) (type tty) (background dark))
 362      (:foreground "gray80" :background "gray50"))
 363     (((class color) (type tty) (background light))
 364      (:foreground "gray50" :background "gray80"))
 365     (((class color) (background dark))
 366      (:foreground "ivory2"))
 367     (((class color) (background light))
 368      (:foreground "ivory4"))
 369     (t :inverse-video t))
 370   "Face for spam-marked articles."
 371   :group 'spam)
 372 ;; backward-compatibility alias
 373 (put 'spam-face 'face-alias 'spam)
 374
 375 (defcustom spam-face 'spam
 376   "Face for spam-marked articles."
 377   :type 'face
 378   :group 'spam)
 379
 380 (defcustom spam-regex-headers-spam '("^X-Spam-Flag: YES")
 381   "Regular expression for positive header spam matches.
 382 Only meaningful if you enable `spam-use-regex-headers'."
 383   :type '(repeat (regexp :tag "Regular expression to match spam header"))
 384   :group 'spam)
 385
 386 (defcustom spam-regex-headers-ham '("^X-Spam-Flag: NO")
 387   "Regular expression for positive header ham matches.
 388 Only meaningful if you enable `spam-use-regex-headers'."
 389   :type '(repeat (regexp :tag "Regular expression to match ham header"))
 390   :group 'spam)
 391
 392 (defcustom spam-regex-body-spam '()
 393   "Regular expression for positive body spam matches.
 394 Only meaningful if you enable `spam-use-regex-body'."
 395   :type '(repeat (regexp :tag "Regular expression to match spam body"))
 396   :group 'spam)
 397
 398 (defcustom spam-regex-body-ham '()
 399   "Regular expression for positive body ham matches.
 400 Only meaningful if you enable `spam-use-regex-body'."
 401   :type '(repeat (regexp :tag "Regular expression to match ham body"))
 402   :group 'spam)
 403
 404 (defcustom spam-summary-score-preferred-header nil
 405   "Preferred header to use for `spam-summary-score'."
 406   :type '(choice :tag "Header name"
 407           (symbol :tag "SpamAssassin etc" X-Spam-Status)
 408           (symbol :tag "Bogofilter"       X-Bogosity)
 409           (const  :tag "No preference, take best guess." nil))
 410   :group 'spam)
 411
 412 (defgroup spam-ifile nil
 413   "Spam ifile configuration."
 414   :group 'spam)
 415
 416 (make-obsolete-variable 'spam-ifile-path 'spam-ifile-program)
 417 ;; "22.1" ;; Gnus 5.10.9
 418 (defcustom spam-ifile-program (executable-find "ifile")
 419   "Name of the ifile program."
 420   :type '(choice (file :tag "Location of ifile")
 421                  (const :tag "ifile is not installed"))
 422   :group 'spam-ifile)
 423
 424 (make-obsolete-variable 'spam-ifile-database-path 'spam-ifile-database)
 425 ;; "22.1" ;; Gnus 5.10.9
 426 (defcustom spam-ifile-database nil
 427   "File name of the ifile database."
 428   :type '(choice (file :tag "Location of the ifile database")
 429                  (const :tag "Use the default"))
 430   :group 'spam-ifile)
 431
 432 (defcustom spam-ifile-spam-category "spam"
 433   "Name of the spam ifile category."
 434   :type 'string
 435   :group 'spam-ifile)
 436
 437 (defcustom spam-ifile-ham-category nil
 438   "Name of the ham ifile category.
 439 If nil, the current group name will be used."
 440   :type '(choice (string :tag "Use a fixed category")
 441                  (const :tag "Use the current group name"))
 442   :group 'spam-ifile)
 443
 444 (defcustom spam-ifile-all-categories nil
 445   "Whether the ifile check will return all categories, or just spam.
 446 Set this to t if you want to use the `spam-split' invocation of ifile as
 447 your main source of newsgroup names."
 448   :type 'boolean
 449   :group 'spam-ifile)
 450
 451 (defgroup spam-bogofilter nil
 452   "Spam bogofilter configuration."
 453   :group 'spam)
 454
 455 (make-obsolete-variable 'spam-bogofilter-path 'spam-bogofilter-program)
 456 ;; "22.1" ;; Gnus 5.10.9
 457 (defcustom spam-bogofilter-program (executable-find "bogofilter")
 458   "Name of the Bogofilter program."
 459   :type '(choice (file :tag "Location of bogofilter")
 460                  (const :tag "Bogofilter is not installed"))
 461   :group 'spam-bogofilter)
 462
 463 (defvar spam-bogofilter-valid 'unknown "Is the bogofilter version valid?")
 464
 465 (defcustom spam-bogofilter-header "X-Bogosity"
 466   "The header that Bogofilter inserts in messages."
 467   :type 'string
 468   :group 'spam-bogofilter)
 469
 470 (defcustom spam-bogofilter-spam-switch "-s"
 471   "The switch that Bogofilter uses to register spam messages."
 472   :type 'string
 473   :group 'spam-bogofilter)
 474
 475 (defcustom spam-bogofilter-ham-switch "-n"
 476   "The switch that Bogofilter uses to register ham messages."
 477   :type 'string
 478   :group 'spam-bogofilter)
 479
 480 (defcustom spam-bogofilter-spam-strong-switch "-S"
 481   "The switch that Bogofilter uses to unregister ham messages."
 482   :type 'string
 483   :group 'spam-bogofilter)
 484
 485 (defcustom spam-bogofilter-ham-strong-switch "-N"
 486   "The switch that Bogofilter uses to unregister spam messages."
 487   :type 'string
 488   :group 'spam-bogofilter)
 489
 490 (defcustom spam-bogofilter-bogosity-positive-spam-header "^\\(Yes\\|Spam\\)"
 491   "The regex on `spam-bogofilter-header' for positive spam identification."
 492   :type 'regexp
 493   :group 'spam-bogofilter)
 494
 495 (defcustom spam-bogofilter-database-directory nil
 496   "Location of the Bogofilter database.
 497 When nil, use the default location."
 498   :type '(choice (directory
 499                   :tag "Location of the Bogofilter database directory")
 500                  (const :tag "Use the default"))
 501   :group 'spam-bogofilter)
 502
 503 (defgroup spam-bsfilter nil
 504   "Spam bsfilter configuration."
 505   :group 'spam)
 506
 507 (make-obsolete-variable 'spam-bsfilter-path 'spam-bsfilter-program)
 508 ;; "22.1" ;; Gnus 5.10.9
 509 (defcustom spam-bsfilter-program (executable-find "bsfilter")
 510   "Name of the Bsfilter program."
 511   :type '(choice (file :tag "Location of bsfilter")
 512                  (const :tag "Bsfilter is not installed"))
 513   :group 'spam-bsfilter)
 514
 515 (defcustom spam-bsfilter-header "X-Spam-Flag"
 516   "The header inserted by Bsfilter to flag spam."
 517   :type 'string
 518   :group 'spam-bsfilter)
 519
 520 (defcustom spam-bsfilter-probability-header "X-Spam-Probability"
 521   "The header that Bsfilter inserts in messages."
 522   :type 'string
 523   :group 'spam-bsfilter)
 524
 525 (defcustom spam-bsfilter-spam-switch "--add-spam"
 526   "The switch that Bsfilter uses to register spam messages."
 527   :type 'string
 528   :group 'spam-bsfilter)
 529
 530 (defcustom spam-bsfilter-ham-switch "--add-clean"
 531   "The switch that Bsfilter uses to register ham messages."
 532   :type 'string
 533   :group 'spam-bsfilter)
 534
 535 (defcustom spam-bsfilter-spam-strong-switch "--sub-spam"
 536   "The switch that Bsfilter uses to unregister ham messages."
 537   :type 'string
 538   :group 'spam-bsfilter)
 539
 540 (defcustom spam-bsfilter-ham-strong-switch "--sub-clean"
 541   "The switch that Bsfilter uses to unregister spam messages."
 542   :type 'string
 543   :group 'spam-bsfilter)
 544
 545 (defcustom spam-bsfilter-database-directory nil
 546   "Directory path of the Bsfilter databases."
 547   :type '(choice (directory
 548                   :tag "Location of the Bsfilter database directory")
 549                  (const :tag "Use the default"))
 550   :group 'spam-bsfilter)
 551
 552 (defgroup spam-spamoracle nil
 553   "Spam spamoracle configuration."
 554   :group 'spam)
 555
 556 (defcustom spam-spamoracle-database nil
 557   "Location of spamoracle database file.
 558 When nil, use the default spamoracle database."
 559   :type '(choice (directory :tag "Location of spamoracle database file.")
 560                  (const :tag "Use the default"))
 561   :group 'spam-spamoracle)
 562
 563 (defcustom spam-spamoracle-binary (executable-find "spamoracle")
 564   "Location of the spamoracle binary."
 565   :type '(choice (directory :tag "Location of the spamoracle binary")
 566                  (const :tag "Use the default"))
 567   :group 'spam-spamoracle)
 568
 569 (defgroup spam-spamassassin nil
 570   "Spam SpamAssassin configuration."
 571   :group 'spam)
 572
 573 (make-obsolete-variable 'spam-spamassassin-path
 574   'spam-spamassassin-program) ;; "22.1" ;; Gnus 5.10.9
 575 (defcustom spam-assassin-program (executable-find "spamassassin")
 576   "Name of the spamassassin program.
 577 Hint: set this to \"spamc\" if you have spamd running.  See the spamc and
 578 spamd man pages for more information on these programs."
 579   :type '(choice (file :tag "Location of spamc")
 580                  (const :tag "spamassassin is not installed"))
 581   :group 'spam-spamassassin)
 582
 583 (defcustom spam-spamassassin-arguments ()
 584   "Arguments to pass to the spamassassin executable.
 585 This must be a list.  For example, `(\"-C\" \"configfile\")'."
 586   :type '(restricted-sexp :match-alternatives (listp))
 587   :group 'spam-spamassassin)
 588
 589 (defcustom spam-spamassassin-spam-flag-header "X-Spam-Flag"
 590   "The header inserted by SpamAssassin to flag spam."
 591   :type 'string
 592   :group 'spam-spamassassin)
 593
 594 (defcustom spam-spamassassin-positive-spam-flag-header "YES"
 595   "The regex on `spam-spamassassin-spam-flag-header' for positive spam
 596 identification"
 597   :type 'string
 598   :group 'spam-spamassassin)
 599
 600 (defcustom spam-spamassassin-spam-status-header "X-Spam-Status"
 601   "The header inserted by SpamAssassin, giving extended scoring information"
 602   :type 'string
 603   :group 'spam-spamassassin)
 604
 605 (make-obsolete-variable 'spam-sa-learn-path 'spam-sa-learn-program)
 606 ;; "22.1" ;; Gnus 5.10.9
 607 (defcustom spam-sa-learn-program (executable-find "sa-learn")
 608   "Name of the sa-learn program."
 609   :type '(choice (file :tag "Location of spamassassin")
 610                  (const :tag "spamassassin is not installed"))
 611   :group 'spam-spamassassin)
 612
 613 (defcustom spam-sa-learn-rebuild t
 614   "Whether sa-learn should rebuild the database every time it is called
 615 Enable this if you want sa-learn to rebuild the database automatically.  Doing
 616 this will slightly increase the running time of the spam registration process.
 617 If you choose not to do this, you will have to run \"sa-learn --rebuild\" in
 618 order for SpamAssassin to recognize the new registered spam."
 619   :type 'boolean
 620   :group 'spam-spamassassin)
 621
 622 (defcustom spam-sa-learn-spam-switch "--spam"
 623   "The switch that sa-learn uses to register spam messages."
 624   :type 'string
 625   :group 'spam-spamassassin)
 626
 627 (defcustom spam-sa-learn-ham-switch "--ham"
 628   "The switch that sa-learn uses to register ham messages."
 629   :type 'string
 630   :group 'spam-spamassassin)
 631
 632 (defcustom spam-sa-learn-unregister-switch "--forget"
 633   "The switch that sa-learn uses to unregister messages messages."
 634   :type 'string
 635   :group 'spam-spamassassin)
 636
 637 (defgroup spam-crm114 nil
 638   "Spam CRM114 Mailfilter configuration."
 639   :group 'spam)
 640
 641 (defcustom spam-crm114-program (executable-find "mailfilter.crm")
 642   "File path of the CRM114 Mailfilter executable program."
 643   :type '(choice (file :tag "Location of CRM114 Mailfilter")
 644          (const :tag "CRM114 Mailfilter is not installed"))
 645   :group 'spam-crm114)
 646
 647 (defcustom spam-crm114-header "X-CRM114-Status"
 648   "The header that CRM114 Mailfilter inserts in messages."
 649   :type 'string
 650   :group 'spam-crm114)
 651
 652 (defcustom spam-crm114-spam-switch "--learnspam"
 653   "The switch that CRM114 Mailfilter uses to register spam messages."
 654   :type 'string
 655   :group 'spam-crm114)
 656
 657 (defcustom spam-crm114-ham-switch "--learnnonspam"
 658   "The switch that CRM114 Mailfilter uses to register ham messages."
 659   :type 'string
 660   :group 'spam-crm114)
 661
 662 (defcustom spam-crm114-spam-strong-switch "--UNKNOWN"
 663   "The switch that CRM114 Mailfilter uses to unregister ham messages."
 664   :type 'string
 665   :group 'spam-crm114)
 666
 667 (defcustom spam-crm114-ham-strong-switch "--UNKNOWN"
 668   "The switch that CRM114 Mailfilter uses to unregister spam messages."
 669   :type 'string
 670   :group 'spam-crm114)
 671
 672 (defcustom spam-crm114-positive-spam-header "^SPAM"
 673   "The regex on `spam-crm114-header' for positive spam identification."
 674   :type 'regexp
 675   :group 'spam-crm114)
 676
 677 (defcustom spam-crm114-database-directory nil
 678   "Directory path of the CRM114 Mailfilter databases."
 679   :type '(choice (directory
 680           :tag "Location of the CRM114 Mailfilter database directory")
 681          (const :tag "Use the default"))
 682   :group 'spam-crm114)
 683
 684 ;;; Key bindings for spam control.
 685
 686 (gnus-define-keys gnus-summary-mode-map
 687   "St" spam-generic-score
 688   "Sx" gnus-summary-mark-as-spam
 689   "Mst" spam-generic-score
 690   "Msx" gnus-summary-mark-as-spam
 691   "\M-d" gnus-summary-mark-as-spam)
 692
 693 (defvar spam-cache-lookups t
 694   "Whether spam.el will try to cache lookups using `spam-caches'.")
 695
 696 (defvar spam-caches (make-hash-table
 697                      :size 10
 698                      :test 'equal)
 699   "Cache of spam detection entries.")
 700
 701 (defvar spam-old-articles nil
 702   "List of old ham and spam articles, generated when a group is entered.")
 703
 704 (defvar spam-split-disabled nil
 705   "If non-nil, `spam-split' is disabled, and always returns nil.")
 706
 707 (defvar spam-split-last-successful-check nil
 708   "Internal variable.
 709 `spam-split' will set this to nil or a spam-use-XYZ check if it
 710 finds ham or spam.")
 711
 712 ;; internal variables for backends
 713 ;; TODO: find a way to create these on the fly in spam-install-backend-super
 714 (defvar spam-use-copy nil)
 715 (defvar spam-use-move nil)
 716 (defvar spam-use-gmane nil)
 717 (defvar spam-use-resend nil)
 718
 719 ;;}}}
 720
 721 ;;{{{ convenience functions
 722
 723 (defun spam-clear-cache (symbol)
 724   "Clear the `spam-caches' entry for a check."
 725   (remhash symbol spam-caches))
 726
 727 (defun spam-xor (a b)
 728   "Logical A xor B."
 729   (and (or a b) (not (and a b))))
 730
 731 (defun spam-set-difference (list1 list2)
 732   "Return a set difference of LIST1 and LIST2.
 733 When either list is nil, the other is returned."
 734   (if (and list1 list2)
 735       ;; we have two non-nil lists
 736       (progn
 737         (dolist (item (append list1 list2))
 738           (when (and (memq item list1) (memq item list2))
 739             (setq list1 (delq item list1))
 740             (setq list2 (delq item list2))))
 741         (append list1 list2))
 742     ;; if either of the lists was nil, return the other one
 743     (if list1 list1 list2)))
 744
 745 (defun spam-group-ham-mark-p (group mark &optional spam)
 746   "Checks if MARK is considered a ham mark in GROUP."
 747   (when (stringp group)
 748     (let* ((marks (spam-group-ham-marks group spam))
 749            (marks (if (symbolp mark)
 750                       marks
 751                     (mapcar 'symbol-value marks))))
 752       (memq mark marks))))
 753
 754 (defun spam-group-spam-mark-p (group mark)
 755   "Checks if MARK is considered a spam mark in GROUP."
 756   (spam-group-ham-mark-p group mark t))
 757
 758 (defun spam-group-ham-marks (group &optional spam)
 759   "In GROUP, get all the ham marks."
 760   (when (stringp group)
 761     (let* ((marks (if spam
 762                       (gnus-parameter-spam-marks group)
 763                     (gnus-parameter-ham-marks group)))
 764            (marks (car marks))
 765            (marks (if (listp (car marks)) (car marks) marks)))
 766       marks)))
 767
 768 (defun spam-group-spam-marks (group)
 769   "In GROUP, get all the spam marks."
 770   (spam-group-ham-marks group t))
 771
 772 (defun spam-group-spam-contents-p (group)
 773   "Is GROUP a spam group?"
 774   (if (and (stringp group) (< 0 (length group)))
 775       (or (member group spam-junk-mailgroups)
 776           (memq 'gnus-group-spam-classification-spam
 777                 (gnus-parameter-spam-contents group)))
 778     nil))
 779
 780 (defun spam-group-ham-contents-p (group)
 781   "Is GROUP a ham group?"
 782   (if (stringp group)
 783       (memq 'gnus-group-spam-classification-ham
 784             (gnus-parameter-spam-contents group))
 785     nil))
 786
 787 (defun spam-classifications ()
 788   "Return list of valid classifications"
 789   '(spam ham))
 790
 791 (defun spam-classification-valid-p (classification)
 792   "Is CLASSIFICATION a valid spam/ham classification?"
 793   (memq classification (spam-classifications)))
 794
 795 (defun spam-backend-properties ()
 796   "Return list of valid classifications."
 797   '(statistical mover check hrf srf huf suf))
 798
 799 (defun spam-backend-property-valid-p (property)
 800   "Is PROPERTY a valid backend property?"
 801   (memq property (spam-backend-properties)))
 802
 803 (defun spam-backend-function-type-valid-p (type)
 804   (or (eq type 'registration)
 805       (eq type 'unregistration)))
 806
 807 (defun spam-process-type-valid-p (process-type)
 808   (or (eq process-type 'incoming)
 809       (eq process-type 'process)))
 810
 811 (defun spam-list-articles (articles classification)
 812   (let ((mark-check (if (eq classification 'spam)
 813                         'spam-group-spam-mark-p
 814                       'spam-group-ham-mark-p))
 815         alist mark-cache-yes mark-cache-no)
 816     (dolist (article articles)
 817       (let ((mark (gnus-summary-article-mark article)))
 818         (unless (or (memq mark mark-cache-yes)
 819                     (memq mark mark-cache-no))
 820           (if (funcall mark-check
 821                        gnus-newsgroup-name
 822                        mark)
 823               (push mark mark-cache-yes)
 824             (push mark mark-cache-no)))
 825         (when (memq mark mark-cache-yes)
 826           (push article alist))))
 827     alist))
 828
 829 ;;}}}
 830
 831 ;;{{{ backend installation functions and procedures
 832
 833 (defun spam-install-backend-super (backend &rest properties)
 834   "Install BACKEND for spam.el.
 835 Accepts incoming CHECK, ham registration function HRF, spam
 836 registration function SRF, ham unregistration function HUF, spam
 837 unregistration function SUF, and an indication whether the
 838 backend is STATISTICAL."
 839   (setq spam-backends (add-to-list 'spam-backends backend))
 840   (while properties
 841     (let ((property (pop properties))
 842           (value (pop properties)))
 843       (if (spam-backend-property-valid-p property)
 844           (put backend property value)
 845         (gnus-error
 846          5
 847          "spam-install-backend-super got an invalid property %s"
 848          property)))))
 849
 850 (defun spam-backend-list (&optional type)
 851   "Return a list of all the backend symbols, constrained by TYPE.
 852 When TYPE is 'non-mover, only non-mover backends are returned.
 853 When TYPE is 'mover, only mover backends are returned."
 854   (let (list)
 855     (dolist (backend spam-backends)
 856       (when (or
 857              (null type)                ;either no type was requested
 858              ;; or the type is 'mover and the backend is a mover
 859              (and
 860               (eq type 'mover)
 861               (spam-backend-mover-p backend))
 862              ;; or the type is 'non-mover and the backend is not a mover
 863              (and
 864               (eq type 'non-mover)
 865               (not (spam-backend-mover-p backend))))
 866         (push backend list)))
 867       list))
 868
 869 (defun spam-backend-check (backend)
 870   "Get the check function for BACKEND.
 871 Each individual check may return nil, t, or a mailgroup name.
 872 The value nil means that the check does not yield a decision, and
 873 so, that further checks are needed.  The value t means that the
 874 message is definitely not spam, and that further spam checks
 875 should be inhibited.  Otherwise, a mailgroup name or the symbol
 876 'spam (depending on `spam-split-symbolic-return') is returned where
 877 the mail should go, and further checks are also inhibited.  The
 878 usual mailgroup name is the value of `spam-split-group', meaning
 879 that the message is definitely a spam."
 880   (get backend 'check))
 881
 882 (defun spam-backend-valid-p (backend)
 883   "Is BACKEND valid?"
 884   (member backend (spam-backend-list)))
 885
 886 (defun spam-backend-info (backend)
 887   "Return information about BACKEND."
 888   (if (spam-backend-valid-p backend)
 889       (let (info)
 890         (setq info (format "Backend %s has the following properties:\n"
 891                            backend))
 892         (dolist (property (spam-backend-properties))
 893           (setq info (format "%s%s=%s\n"
 894                              info
 895                              property
 896                              (get backend property))))
 897         info)
 898     (gnus-error 5 "spam-backend-info was asked about an invalid backend %s"
 899                 backend)))
 900
 901 (defun spam-backend-function (backend classification type)
 902   "Get the BACKEND function for CLASSIFICATION and TYPE.
 903 TYPE is 'registration or 'unregistration.
 904 CLASSIFICATION is 'ham or 'spam."
 905   (if (and
 906        (spam-classification-valid-p classification)
 907        (spam-backend-function-type-valid-p type))
 908       (let ((retrieval
 909              (intern
 910               (format "spam-backend-%s-%s-function"
 911                       classification
 912                       type))))
 913         (funcall retrieval backend))
 914     (gnus-error
 915      5
 916      "%s was passed invalid backend %s, classification %s, or type %s"
 917      "spam-backend-function"
 918      backend
 919      classification
 920      type)))
 921
 922 (defun spam-backend-article-list-property (classification
 923                                            &optional unregister)
 924   "Property name of article list with CLASSIFICATION and UNREGISTER."
 925   (let* ((r (if unregister "unregister" "register"))
 926          (prop (format "%s-%s" classification r)))
 927     prop))
 928
 929 (defun spam-backend-get-article-todo-list (backend
 930                                            classification
 931                                            &optional unregister)
 932   "Get the articles to be processed for BACKEND and CLASSIFICATION.
 933 With UNREGISTER, get articles to be unregistered.
 934 This is a temporary storage function - nothing here persists."
 935   (get
 936    backend
 937    (intern (spam-backend-article-list-property classification unregister))))
 938
 939 (defun spam-backend-put-article-todo-list (backend classification list &optional unregister)
 940   "Set the LIST of articles to be processed for BACKEND and CLASSIFICATION.
 941 With UNREGISTER, set articles to be unregistered.
 942 This is a temporary storage function - nothing here persists."
 943   (put
 944    backend
 945    (intern (spam-backend-article-list-property classification unregister))
 946    list))
 947
 948 (defun spam-backend-ham-registration-function (backend)
 949   "Get the ham registration function for BACKEND."
 950   (get backend 'hrf))
 951
 952 (defun spam-backend-spam-registration-function (backend)
 953   "Get the spam registration function for BACKEND."
 954   (get backend 'srf))
 955
 956 (defun spam-backend-ham-unregistration-function (backend)
 957   "Get the ham unregistration function for BACKEND."
 958   (get backend 'huf))
 959
 960 (defun spam-backend-spam-unregistration-function (backend)
 961   "Get the spam unregistration function for BACKEND."
 962   (get backend 'suf))
 963
 964 (defun spam-backend-statistical-p (backend)
 965   "Is BACKEND statistical?"
 966   (get backend 'statistical))
 967
 968 (defun spam-backend-mover-p (backend)
 969   "Is BACKEND a mover?"
 970   (get backend 'mover))
 971
 972 (defun spam-install-backend-alias (backend alias)
 973   "Add ALIAS to an existing BACKEND.
 974 The previous backend settings for ALIAS are erased."
 975
 976   ;; install alias with no properties at first
 977   (spam-install-backend-super alias)
 978
 979   (dolist (property (spam-backend-properties))
 980     (put alias property (get backend property))))
 981
 982 (defun spam-install-checkonly-backend (backend check)
 983   "Install a BACKEND than can only CHECK for spam."
 984   (spam-install-backend-super backend 'check check))
 985
 986 (defun spam-install-mover-backend (backend hrf srf huf suf)
 987   "Install a BACKEND than can move articles at summary exit.
 988 Accepts ham registration function HRF, spam registration function
 989 SRF, ham unregistration function HUF, spam unregistration
 990 function SUF.  The backend has no incoming check and can't be
 991 statistical."
 992   (spam-install-backend-super
 993    backend
 994    'hrf hrf 'srf srf 'huf huf 'suf suf 'mover t))
 995
 996 (defun spam-install-nocheck-backend (backend hrf srf huf suf)
 997   "Install a BACKEND than has no check.
 998 Accepts ham registration function HRF, spam registration function
 999 SRF, ham unregistration function HUF, spam unregistration
1000 function SUF.  The backend has no incoming check and can't be
1001 statistical (it could be, but in practice that doesn't happen)."
1002   (spam-install-backend-super
1003    backend
1004    'hrf hrf 'srf srf 'huf huf 'suf suf))
1005
1006 (defun spam-install-backend (backend check hrf srf huf suf)
1007   "Install a BACKEND.
1008 Accepts incoming CHECK, ham registration function HRF, spam
1009 registration function SRF, ham unregistration function HUF, spam
1010 unregistration function SUF.  The backend won't be
1011 statistical (use `spam-install-statistical-backend' for that)."
1012   (spam-install-backend-super
1013    backend
1014    'check check 'hrf hrf 'srf srf 'huf huf 'suf suf))
1015
1016 (defun spam-install-statistical-backend (backend check hrf srf huf suf)
1017   "Install a BACKEND.
1018 Accepts incoming CHECK, ham registration function HRF, spam
1019 registration function SRF, ham unregistration function HUF, spam
1020 unregistration function SUF.  The backend will be
1021 statistical (use `spam-install-backend' for non-statistical
1022 backends)."
1023   (spam-install-backend-super
1024    backend
1025    'check check 'statistical t 'hrf hrf 'srf srf 'huf huf 'suf suf))
1026
1027 (defun spam-install-statistical-checkonly-backend (backend check)
1028   "Install a statistical BACKEND than can only CHECK for spam."
1029   (spam-install-backend-super
1030    backend
1031    'check check 'statistical t))
1032
1033 ;;}}}
1034
1035 ;;{{{ backend installations
1036 (spam-install-checkonly-backend 'spam-use-blackholes
1037                                 'spam-check-blackholes)
1038
1039 (spam-install-checkonly-backend 'spam-use-hashcash
1040                                 'spam-check-hashcash)
1041
1042 (spam-install-checkonly-backend 'spam-use-spamassassin-headers
1043                                 'spam-check-spamassassin-headers)
1044
1045 (spam-install-checkonly-backend 'spam-use-bogofilter-headers
1046                                 'spam-check-bogofilter-headers)
1047
1048 (spam-install-checkonly-backend 'spam-use-bsfilter-headers
1049                                 'spam-check-bsfilter-headers)
1050
1051 (spam-install-checkonly-backend 'spam-use-gmane-xref
1052                                 'spam-check-gmane-xref)
1053
1054 (spam-install-checkonly-backend 'spam-use-regex-headers
1055                                 'spam-check-regex-headers)
1056
1057 (spam-install-statistical-checkonly-backend 'spam-use-regex-body
1058                                             'spam-check-regex-body)
1059
1060 ;; TODO: NOTE: spam-use-ham-copy is now obsolete, use (ham spam-use-copy) instead
1061 (spam-install-mover-backend 'spam-use-move
1062                             'spam-move-ham-routine
1063                             'spam-move-spam-routine
1064                             nil
1065                             nil)
1066
1067 (spam-install-nocheck-backend 'spam-use-copy
1068                               'spam-copy-ham-routine
1069                               'spam-copy-spam-routine
1070                               nil
1071                               nil)
1072
1073 (spam-install-nocheck-backend 'spam-use-gmane
1074                               'spam-report-gmane-unregister-routine
1075                               'spam-report-gmane-register-routine
1076                               'spam-report-gmane-register-routine
1077                               'spam-report-gmane-unregister-routine)
1078
1079 (spam-install-nocheck-backend 'spam-use-resend
1080                               'spam-report-resend-register-ham-routine
1081                               'spam-report-resend-register-routine
1082                               nil
1083                               nil)
1084
1085 (spam-install-backend 'spam-use-BBDB
1086                       'spam-check-BBDB
1087                       'spam-BBDB-register-routine
1088                       nil
1089                       'spam-BBDB-unregister-routine
1090                       nil)
1091
1092 (spam-install-backend-alias 'spam-use-BBDB 'spam-use-BBDB-exclusive)
1093
1094 (spam-install-backend 'spam-use-blacklist
1095                       'spam-check-blacklist
1096                       nil
1097                       'spam-blacklist-register-routine
1098                       nil
1099                       'spam-blacklist-unregister-routine)
1100
1101 (spam-install-backend 'spam-use-whitelist
1102                       'spam-check-whitelist
1103                       'spam-whitelist-register-routine
1104                       nil
1105                       'spam-whitelist-unregister-routine
1106                       nil)
1107
1108 (spam-install-statistical-backend 'spam-use-ifile
1109                                   'spam-check-ifile
1110                                   'spam-ifile-register-ham-routine
1111                                   'spam-ifile-register-spam-routine
1112                                   'spam-ifile-unregister-ham-routine
1113                                   'spam-ifile-unregister-spam-routine)
1114
1115 (spam-install-statistical-backend 'spam-use-spamoracle
1116                                   'spam-check-spamoracle
1117                                   'spam-spamoracle-learn-ham
1118                                   'spam-spamoracle-learn-spam
1119                                   'spam-spamoracle-unlearn-ham
1120                                   'spam-spamoracle-unlearn-spam)
1121
1122 (spam-install-statistical-backend 'spam-use-stat
1123                                   'spam-check-stat
1124                                   'spam-stat-register-ham-routine
1125                                   'spam-stat-register-spam-routine
1126                                   'spam-stat-unregister-ham-routine
1127                                   'spam-stat-unregister-spam-routine)
1128
1129 (spam-install-statistical-backend 'spam-use-spamassassin
1130                                   'spam-check-spamassassin
1131                                   'spam-spamassassin-register-ham-routine
1132                                   'spam-spamassassin-register-spam-routine
1133                                   'spam-spamassassin-unregister-ham-routine
1134                                   'spam-spamassassin-unregister-spam-routine)
1135
1136 (spam-install-statistical-backend 'spam-use-bogofilter
1137                                   'spam-check-bogofilter
1138                                   'spam-bogofilter-register-ham-routine
1139                                   'spam-bogofilter-register-spam-routine
1140                                   'spam-bogofilter-unregister-ham-routine
1141                                   'spam-bogofilter-unregister-spam-routine)
1142
1143 (spam-install-statistical-backend 'spam-use-bsfilter
1144                                   'spam-check-bsfilter
1145                                   'spam-bsfilter-register-ham-routine
1146                                   'spam-bsfilter-register-spam-routine
1147                                   'spam-bsfilter-unregister-ham-routine
1148                                   'spam-bsfilter-unregister-spam-routine)
1149
1150 (spam-install-statistical-backend 'spam-use-crm114
1151                                   'spam-check-crm114
1152                                   'spam-crm114-register-ham-routine
1153                                   'spam-crm114-register-spam-routine
1154                                   ;; does CRM114 Mailfilter support unregistration?
1155                                   nil
1156                                   nil)
1157
1158 ;;}}}
1159
1160 ;;{{{ scoring and summary formatting
1161 (defun spam-necessary-extra-headers ()
1162   "Return the extra headers spam.el thinks are necessary."
1163   (let (list)
1164     (when (or spam-use-spamassassin
1165               spam-use-spamassassin-headers
1166               spam-use-regex-headers)
1167       (push 'X-Spam-Status list))
1168     (when (or spam-use-bogofilter
1169               spam-use-regex-headers)
1170       (push 'X-Bogosity list))
1171     (when (or spam-use-crm114
1172               spam-use-regex-headers)
1173       (push 'X-CRM114-Status list))
1174     list))
1175
1176 (defun spam-user-format-function-S (headers)
1177   (when headers
1178     (format "%3.2f"
1179             (spam-summary-score headers spam-summary-score-preferred-header))))
1180
1181 (defun spam-article-sort-by-spam-status (h1 h2)
1182   "Sort articles by score."
1183   (let (result)
1184     (dolist (header (spam-necessary-extra-headers))
1185       (let ((s1 (spam-summary-score h1 header))
1186             (s2 (spam-summary-score h2 header)))
1187       (unless (= s1 s2)
1188         (setq result (< s1 s2))
1189         (return))))
1190     result))
1191
1192 (defvar spam-spamassassin-score-regexp
1193   ".*\\b\\(?:score\\|hits\\)=\\(-?[0-9.]+\\)"
1194   "Regexp matching SpamAssassin score header.
1195 The first group must match the number.")
1196
1197 (defun spam-extra-header-to-number (header headers)
1198   "Transform an extra HEADER to a number, using list of HEADERS.
1199 Note this has to be fast."
1200   (let ((header-content (gnus-extra-header header headers)))
1201     (if header-content
1202         (cond
1203          ((eq header 'X-Spam-Status)
1204           (string-to-number (gnus-replace-in-string
1205                              header-content
1206                              spam-spamassassin-score-regexp
1207                              "\\1")))
1208          ;; for CRM checking, it's probably faster to just do the string match
1209          ((string-match "( pR: \\([0-9.-]+\\)" header-content)
1210           (- (string-to-number (match-string 1 header-content))))
1211          ((eq header 'X-Bogosity)
1212           (string-to-number (gnus-replace-in-string
1213                              (gnus-replace-in-string
1214                               header-content
1215                               ".*spamicity=" "")
1216                              ",.*" "")))
1217          (t nil))
1218       nil)))
1219
1220 (defun spam-summary-score (headers &optional specific-header)
1221   "Score an article for the summary buffer, as fast as possible.
1222 With SPECIFIC-HEADER, returns only that header's score.
1223 Will not return a nil score."
1224   (let (score)
1225     (dolist (header
1226              (if specific-header
1227                  (list specific-header)
1228                (spam-necessary-extra-headers)))
1229       (setq score
1230             (spam-extra-header-to-number header headers))
1231       (when score
1232         (return)))
1233     (or score 0)))
1234
1235 (defun spam-generic-score (&optional recheck)
1236   "Invoke whatever scoring method we can."
1237   (interactive "P")
1238   (cond
1239    ((or spam-use-spamassassin spam-use-spamassassin-headers)
1240     (spam-spamassassin-score recheck))
1241    ((or spam-use-bsfilter spam-use-bsfilter-headers)
1242     (spam-bsfilter-score recheck))
1243    (spam-use-crm114
1244     (spam-crm114-score))
1245    (t (spam-bogofilter-score recheck))))
1246 ;;}}}
1247
1248 ;;{{{ set up widening, processor checks
1249
1250 ;;; set up IMAP widening if it's necessary
1251 (defun spam-setup-widening ()
1252   (when (spam-widening-needed-p)
1253     (setq nnimap-split-download-body-default t)))
1254
1255 (defun spam-widening-needed-p (&optional force-symbols)
1256   (let (found)
1257     (dolist (backend (spam-backend-list))
1258       (when (and (spam-backend-statistical-p backend)
1259                  (or (symbol-value backend)
1260                      (memq backend force-symbols)))
1261         (setq found backend)))
1262     found))
1263
1264 (defvar spam-list-of-processors
1265   ;; note the nil processors are not defined in gnus.el
1266   '((gnus-group-spam-exit-processor-bogofilter   spam spam-use-bogofilter)
1267     (gnus-group-spam-exit-processor-bsfilter     spam spam-use-bsfilter)
1268     (gnus-group-spam-exit-processor-blacklist    spam spam-use-blacklist)
1269     (gnus-group-spam-exit-processor-ifile        spam spam-use-ifile)
1270     (gnus-group-spam-exit-processor-stat         spam spam-use-stat)
1271     (gnus-group-spam-exit-processor-spamoracle   spam spam-use-spamoracle)
1272     (gnus-group-spam-exit-processor-spamassassin spam spam-use-spamassassin)
1273     (gnus-group-spam-exit-processor-report-gmane spam spam-use-gmane) ;; Buggy?
1274     (gnus-group-ham-exit-processor-ifile         ham spam-use-ifile)
1275     (gnus-group-ham-exit-processor-bogofilter    ham spam-use-bogofilter)
1276     (gnus-group-ham-exit-processor-bsfilter      ham spam-use-bsfilter)
1277     (gnus-group-ham-exit-processor-stat          ham spam-use-stat)
1278     (gnus-group-ham-exit-processor-whitelist     ham spam-use-whitelist)
1279     (gnus-group-ham-exit-processor-BBDB          ham spam-use-BBDB)
1280     (gnus-group-ham-exit-processor-copy          ham spam-use-ham-copy)
1281     (gnus-group-ham-exit-processor-spamassassin  ham spam-use-spamassassin)
1282     (gnus-group-ham-exit-processor-spamoracle    ham spam-use-spamoracle))
1283   "The OBSOLETE `spam-list-of-processors' list.
1284 This list contains pairs associating the obsolete ham/spam exit
1285 processor variables with a classification and a spam-use-*
1286 variable.  When the processor variable is nil, just the
1287 classification and spam-use-* check variable are used.  This is
1288 superseded by the new spam backend code, so it's only consulted
1289 for backwards compatibility.")
1290
1291 (defun spam-group-processor-p (group backend &optional classification)
1292   "Checks if GROUP has a BACKEND with CLASSIFICATION registered.
1293 Also accepts the obsolete processors, which can be found in
1294 gnus.el and in spam-list-of-processors.  In the case of mover
1295 backends, checks the setting of `spam-summary-exit-behavior' in
1296 addition to the set values for the group."
1297   (if (and (stringp group)
1298            (symbolp backend))
1299       (let ((old-style (assq backend spam-list-of-processors))
1300             (parameters (nth 0 (gnus-parameter-spam-process group)))
1301             found)
1302         (if old-style  ; old-style processor
1303             (spam-group-processor-p group (nth 2 old-style) (nth 1 old-style))
1304           ;; now search for the parameter
1305           (dolist (parameter parameters)
1306             (when (and (null found)
1307                        (listp parameter)
1308                        (eq classification (nth 0 parameter))
1309                        (eq backend (nth 1 parameter)))
1310               (setq found t)))
1311
1312           ;; now, if the parameter was not found, do the
1313           ;; spam-summary-exit-behavior-logic for mover backends
1314           (unless found
1315             (when (spam-backend-mover-p backend)
1316               (setq
1317                found
1318                (cond
1319                 ((eq spam-summary-exit-behavior 'move-all) t)
1320                 ((eq spam-summary-exit-behavior 'move-none) nil)
1321                 ((eq spam-summary-exit-behavior 'default)
1322                  (or (eq classification 'spam) ;move spam out of all groups
1323                      ;; move ham out of spam groups
1324                      (and (eq classification 'ham)
1325                           (spam-group-spam-contents-p group))))
1326                 (t (gnus-error 5 "Unknown spam-summary-exit-behavior: %s"
1327                                spam-summary-exit-behavior))))))
1328
1329           found))
1330     nil))
1331
1332 ;;}}}
1333
1334 ;;{{{ Summary entry and exit processing.
1335
1336 (defun spam-mark-junk-as-spam-routine ()
1337   ;; check the global list of group names spam-junk-mailgroups and the
1338   ;; group parameters
1339   (when (spam-group-spam-contents-p gnus-newsgroup-name)
1340     (gnus-message 6 "Marking %s articles as spam"
1341                   (if spam-mark-only-unseen-as-spam
1342                       "unseen"
1343                     "unread"))
1344     (let ((articles (if spam-mark-only-unseen-as-spam
1345                         gnus-newsgroup-unseen
1346                       gnus-newsgroup-unreads)))
1347       (if spam-mark-new-messages-in-spam-group-as-spam
1348           (dolist (article articles)
1349             (gnus-summary-mark-article article gnus-spam-mark))
1350         (gnus-message 9 "Did not mark new messages as spam.")))))
1351
1352 (defun spam-summary-prepare ()
1353   (setq spam-old-articles
1354         (list (cons 'ham (spam-list-articles gnus-newsgroup-articles 'ham))
1355               (cons 'spam (spam-list-articles gnus-newsgroup-articles 'spam))))
1356   (spam-mark-junk-as-spam-routine))
1357
1358 ;; The spam processors are invoked for any group, spam or ham or neither
1359 (defun spam-summary-prepare-exit ()
1360   (unless gnus-group-is-exiting-without-update-p
1361     (gnus-message 6 "Exiting summary buffer and applying spam rules")
1362
1363     ;; before we begin, remove any article limits
1364 ;    (ignore-errors
1365 ;      (gnus-summary-pop-limit t))
1366
1367     ;; first of all, unregister any articles that are no longer ham or spam
1368     ;; we have to iterate over the processors, or else we'll be too slow
1369     (dolist (classification (spam-classifications))
1370       (let* ((old-articles (cdr-safe (assq classification spam-old-articles)))
1371              (new-articles (spam-list-articles
1372                             gnus-newsgroup-articles
1373                             classification))
1374              (changed-articles (spam-set-difference new-articles old-articles)))
1375         ;; now that we have the changed articles, we go through the processors
1376         (dolist (backend (spam-backend-list))
1377           (let (unregister-list)
1378             (dolist (article changed-articles)
1379               (let ((id (spam-fetch-field-message-id-fast article)))
1380                 (when (spam-log-unregistration-needed-p
1381                        id 'process classification backend)
1382                   (push article unregister-list))))
1383             ;; call spam-register-routine with specific articles to unregister,
1384             ;; when there are articles to unregister and the check is enabled
1385             (when (and unregister-list (symbol-value backend))
1386               (spam-backend-put-article-todo-list backend
1387                                                   classification
1388                                                   unregister-list
1389                                                   t))))))
1390
1391     ;; do the non-moving backends first, then the moving ones
1392     (dolist (backend-type '(non-mover mover))
1393       (dolist (classification (spam-classifications))
1394         (dolist (backend (spam-backend-list backend-type))
1395           (when (spam-group-processor-p
1396                  gnus-newsgroup-name
1397                  backend
1398                  classification)
1399             (spam-backend-put-article-todo-list backend
1400                                                 classification
1401                                                 (spam-list-articles
1402                                                  gnus-newsgroup-articles
1403                                                  classification))))))
1404
1405     (spam-resolve-registrations-routine) ; do the registrations now
1406
1407     ;; we mark all the leftover spam articles as expired at the end
1408     (dolist (article (spam-list-articles
1409                       gnus-newsgroup-articles
1410                       'spam))
1411       (gnus-summary-mark-article article gnus-expirable-mark)))
1412
1413   (setq spam-old-articles nil))
1414
1415 ;;}}}
1416
1417 ;;{{{ spam-use-move and spam-use-copy backend support functions
1418
1419 (defun spam-copy-or-move-routine (copy groups articles classification)
1420
1421   (when (and (car-safe groups) (listp (car-safe groups)))
1422     (setq groups (pop groups)))
1423
1424   (unless (listp groups)
1425     (setq groups (list groups)))
1426
1427     ;; remove the current process mark
1428   (gnus-summary-kill-process-mark)
1429
1430   (let ((backend-supports-deletions
1431          (gnus-check-backend-function
1432           'request-move-article gnus-newsgroup-name))
1433         (respool-method (gnus-find-method-for-group gnus-newsgroup-name))
1434         article mark deletep respool)
1435
1436     (when (member 'respool groups)
1437       (setq respool t)                  ; boolean for later
1438       (setq groups '("fake"))) ; when respooling, groups are dynamic so fake it
1439
1440     ;; now do the actual move
1441     (dolist (group groups)
1442       (when (and articles (stringp group))
1443
1444         ;; first, mark the article with the process mark and, if needed,
1445         ;; the unread or expired mark (for ham and spam respectively)
1446         (dolist (article articles)
1447           (when (and (eq classification 'ham)
1448                      spam-mark-ham-unread-before-move-from-spam-group)
1449             (gnus-message 9 "Marking ham article %d unread before move"
1450                           article)
1451             (gnus-summary-mark-article article gnus-unread-mark))
1452           (when (and (eq classification 'spam)
1453                      (not copy))
1454             (gnus-message 9 "Marking spam article %d expirable before move"
1455                           article)
1456             (gnus-summary-mark-article article gnus-expirable-mark))
1457           (gnus-summary-set-process-mark article)
1458
1459           (if respool              ; respooling is with a "fake" group
1460               (let ((spam-split-disabled
1461                      (or spam-split-disabled
1462                          (and (eq classification 'ham)
1463                               spam-disable-spam-split-during-ham-respool))))
1464                 (gnus-message 9 "Respooling article %d with method %s"
1465                               article respool-method)
1466                 (gnus-summary-respool-article nil respool-method))
1467             (if (or (not backend-supports-deletions) ; else, we are not respooling
1468                     (> (length groups) 1))
1469                 (progn              ; if copying, copy and set deletep
1470                   (gnus-message 9 "Copying article %d to group %s"
1471                                 article group)
1472                   (gnus-summary-copy-article nil group)
1473                   (setq deletep t))
1474               (gnus-message 9 "Moving article %d to group %s"
1475                             article group)
1476               (gnus-summary-move-article nil group))))) ; else move articles
1477
1478       ;; now delete the articles, unless a) copy is t, and there was a copy done
1479       ;;                                 b) a move was done to a single group
1480       ;;                                 c) backend-supports-deletions is nil
1481       (unless copy
1482         (when (and deletep backend-supports-deletions)
1483           (dolist (article articles)
1484               (gnus-summary-set-process-mark article)
1485               (gnus-message 9 "Deleting article %d" article))
1486           (when articles
1487             (let ((gnus-novice-user nil)) ; don't ask me if I'm sure
1488               (gnus-summary-delete-article nil)))))
1489
1490       (gnus-summary-yank-process-mark)
1491       (length articles))))
1492
1493 (defun spam-copy-spam-routine (articles)
1494   (spam-copy-or-move-routine
1495    t
1496    (gnus-parameter-spam-process-destination gnus-newsgroup-name)
1497    articles
1498    'spam))
1499
1500 (defun spam-move-spam-routine (articles)
1501   (spam-copy-or-move-routine
1502    nil
1503    (gnus-parameter-spam-process-destination gnus-newsgroup-name)
1504    articles
1505    'spam))
1506
1507 (defun spam-copy-ham-routine (articles)
1508   (spam-copy-or-move-routine
1509    t
1510    (gnus-parameter-ham-process-destination gnus-newsgroup-name)
1511    articles
1512    'ham))
1513
1514 (defun spam-move-ham-routine (articles)
1515   (spam-copy-or-move-routine
1516    nil
1517    (gnus-parameter-ham-process-destination gnus-newsgroup-name)
1518    articles
1519    'ham))
1520
1521 ;;}}}
1522
1523 ;;{{{ article and field retrieval code
1524 (defun spam-get-article-as-string (article)
1525   (when (numberp article)
1526     (with-temp-buffer
1527       (gnus-request-article-this-buffer
1528        article
1529        gnus-newsgroup-name)
1530       (buffer-string))))
1531
1532 ;; disabled for now
1533 ;; (defun spam-get-article-as-filename (article)
1534 ;;   (let ((article-filename))
1535 ;;     (when (numberp article)
1536 ;;       (nnml-possibly-change-directory
1537 ;;        (gnus-group-real-name gnus-newsgroup-name))
1538 ;;       (setq article-filename (expand-file-name
1539 ;;                              (int-to-string article) nnml-current-directory)))
1540 ;;     (if (file-exists-p article-filename)
1541 ;;      article-filename
1542 ;;       nil)))
1543
1544 (defun spam-fetch-field-fast (article field &optional prepared-data-header)
1545   "Fetch a FIELD for ARTICLE quickly, using the internal gnus-data-list function.
1546 When PREPARED-DATA-HEADER is given, don't look in the Gnus data.
1547 When FIELD is 'number, ARTICLE can be any number (since we want
1548 to find it out)."
1549   (when (numberp article)
1550     (let* ((data-header (or prepared-data-header
1551                             (spam-fetch-article-header article))))
1552       (if (arrayp data-header)
1553         (cond
1554          ((equal field 'number)
1555           (mail-header-number data-header))
1556          ((equal field 'from)
1557           (mail-header-from data-header))
1558          ((equal field 'message-id)
1559           (mail-header-message-id data-header))
1560          ((equal field 'subject)
1561           (mail-header-subject data-header))
1562          ((equal field 'references)
1563           (mail-header-references data-header))
1564          ((equal field 'date)
1565           (mail-header-date data-header))
1566          ((equal field 'xref)
1567           (mail-header-xref data-header))
1568          ((equal field 'extra)
1569           (mail-header-extra data-header))
1570          (t
1571           (gnus-error
1572            5
1573            "spam-fetch-field-fast: unknown field %s requested"
1574            field)
1575           nil))
1576         (gnus-message 6 "Article %d has a nil data header" article)))))
1577
1578 (defun spam-fetch-field-from-fast (article &optional prepared-data-header)
1579   (spam-fetch-field-fast article 'from prepared-data-header))
1580
1581 (defun spam-fetch-field-subject-fast (article &optional prepared-data-header)
1582   (spam-fetch-field-fast article 'subject prepared-data-header))
1583
1584 (defun spam-fetch-field-message-id-fast (article &optional prepared-data-header)
1585   (spam-fetch-field-fast article 'message-id prepared-data-header))
1586
1587 (defun spam-generate-fake-headers (article)
1588   (let ((dh (spam-fetch-article-header article)))
1589     (if dh
1590         (concat
1591          (format
1592           ;; 80-character limit makes for strange constructs
1593           (concat "From: %s\nSubject: %s\nMessage-ID: %s\n"
1594                   "Date: %s\nReferences: %s\nXref: %s\n")
1595           (spam-fetch-field-fast article 'from dh)
1596           (spam-fetch-field-fast article 'subject dh)
1597           (spam-fetch-field-fast article 'message-id dh)
1598           (spam-fetch-field-fast article 'date dh)
1599           (spam-fetch-field-fast article 'references dh)
1600           (spam-fetch-field-fast article 'xref dh))
1601          (when (spam-fetch-field-fast article 'extra dh)
1602            (format "%s\n" (spam-fetch-field-fast article 'extra dh))))
1603       (gnus-message
1604        5
1605        "spam-generate-fake-headers: article %d didn't have a valid header"
1606        article))))
1607
1608 (defun spam-fetch-article-header (article)
1609   (save-excursion
1610     (set-buffer gnus-summary-buffer)
1611     (gnus-read-header article)
1612     (nth 3 (assq article gnus-newsgroup-data))))
1613 ;;}}}
1614
1615 ;;{{{ Spam determination.
1616
1617 (defun spam-split (&rest specific-checks)
1618   "Split this message into the `spam' group if it is spam.
1619 This function can be used as an entry in the variable `nnmail-split-fancy',
1620 for example like this: (: spam-split).  It can take checks as
1621 parameters.  A string as a parameter will set the
1622 `spam-split-group' to that string.
1623
1624 See the Info node `(gnus)Fancy Mail Splitting' for more details."
1625   (interactive)
1626   (setq spam-split-last-successful-check nil)
1627   (unless spam-split-disabled
1628     (let ((spam-split-group-choice spam-split-group))
1629       (dolist (check specific-checks)
1630         (when (stringp check)
1631           (setq spam-split-group-choice check)
1632           (setq specific-checks (delq check specific-checks))))
1633
1634       (let ((spam-split-group spam-split-group-choice)
1635             (widening-needed-check (spam-widening-needed-p specific-checks)))
1636         (save-excursion
1637           (save-restriction
1638             (when widening-needed-check
1639               (widen)
1640               (gnus-message 8 "spam-split: widening the buffer (%s requires it)"
1641                             widening-needed-check))
1642             (let ((backends (spam-backend-list))
1643                   decision)
1644               (while (and backends (not decision))
1645                 (let* ((backend (pop backends))
1646                        (check-function (spam-backend-check backend))
1647                        (spam-split-group (if spam-split-symbolic-return
1648                                              'spam
1649                                            spam-split-group)))
1650                   (when (or
1651                          ;; either, given specific checks, this is one of them
1652                          (memq backend specific-checks)
1653                          ;; or, given no specific checks, spam-use-CHECK is set
1654                          (and (null specific-checks) (symbol-value backend)))
1655                     (gnus-message 6 "spam-split: calling the %s function"
1656                                   check-function)
1657                     (setq decision (funcall check-function))
1658                     ;; if we got a decision at all, save the current check
1659                     (when decision
1660                       (setq spam-split-last-successful-check backend))
1661
1662                     (when (eq decision 'spam)
1663                       (unless spam-split-symbolic-return
1664                         (gnus-error
1665                          5
1666                          (format "spam-split got %s but %s is nil"
1667                                  decision
1668                                  spam-split-symbolic-return)))))))
1669               (if (eq decision t)
1670                   (if spam-split-symbolic-return-positive 'ham nil)
1671                 decision))))))))
1672
1673 (defun spam-find-spam ()
1674   "Detect spam in the current newsgroup using `spam-split'."
1675   (interactive)
1676
1677   (let* ((group gnus-newsgroup-name)
1678          (autodetect (gnus-parameter-spam-autodetect group))
1679          (methods (gnus-parameter-spam-autodetect-methods group))
1680          (first-method (nth 0 methods))
1681          (articles (if spam-autodetect-recheck-messages
1682                        gnus-newsgroup-articles
1683                      gnus-newsgroup-unseen))
1684          article-cannot-be-faked)
1685
1686
1687     (dolist (backend methods)
1688       (when (spam-backend-statistical-p backend)
1689         (setq article-cannot-be-faked t)
1690         (return)))
1691
1692     (when (memq 'default methods)
1693       (setq article-cannot-be-faked t))
1694
1695     (when (and autodetect
1696                (not (equal first-method 'none)))
1697       (mapcar
1698        (lambda (article)
1699          (let ((id (spam-fetch-field-message-id-fast article))
1700                (subject (spam-fetch-field-subject-fast article))
1701                (sender (spam-fetch-field-from-fast article))
1702                registry-lookup)
1703
1704            (unless id
1705              (gnus-message 6 "Article %d has no message ID!" article))
1706
1707            (when (and id spam-log-to-registry)
1708              (setq registry-lookup (spam-log-registration-type id 'incoming))
1709              (when registry-lookup
1710                (gnus-message
1711                 9
1712                 "spam-find-spam: message %s was already registered incoming"
1713                 id)))
1714
1715            (let* ((spam-split-symbolic-return t)
1716                   (spam-split-symbolic-return-positive t)
1717                   (fake-headers (spam-generate-fake-headers article))
1718                   (split-return
1719                    (or registry-lookup
1720                        (with-temp-buffer
1721                          (if article-cannot-be-faked
1722                              (gnus-request-article-this-buffer
1723                               article
1724                               group)
1725                            ;; else, we fake the article
1726                            (when fake-headers (insert fake-headers)))
1727                          (if (or (null first-method)
1728                                  (equal first-method 'default))
1729                              (spam-split)
1730                            (apply 'spam-split methods))))))
1731              (if (equal split-return 'spam)
1732                  (gnus-summary-mark-article article gnus-spam-mark))
1733
1734              (when (and id split-return spam-log-to-registry)
1735                (when (zerop (gnus-registry-group-count id))
1736                  (gnus-registry-add-group
1737                   id group subject sender))
1738
1739                (unless registry-lookup
1740                  (spam-log-processing-to-registry
1741                   id
1742                   'incoming
1743                   split-return
1744                   spam-split-last-successful-check
1745                   group))))))
1746        articles))))
1747
1748 ;;}}}
1749
1750 ;;{{{ registration/unregistration functions
1751
1752 (defun spam-resolve-registrations-routine ()
1753   "Go through the backends and register or unregister articles as needed."
1754   (dolist (backend-type '(non-mover mover))
1755     (dolist (classification (spam-classifications))
1756       (dolist (backend (spam-backend-list backend-type))
1757         (let ((rlist (spam-backend-get-article-todo-list
1758                       backend classification))
1759               (ulist (spam-backend-get-article-todo-list
1760                       backend classification t))
1761               (delcount 0))
1762
1763           ;; clear the old lists right away
1764           (spam-backend-put-article-todo-list backend
1765                                               classification
1766                                               nil
1767                                               nil)
1768           (spam-backend-put-article-todo-list backend
1769                                               classification
1770                                               nil
1771                                               t)
1772
1773           ;; eliminate duplicates
1774           (dolist (article (copy-sequence ulist))
1775             (when (memq article rlist)
1776               (incf delcount)
1777               (setq rlist (delq article rlist))
1778               (setq ulist (delq article ulist))))
1779
1780           (unless (zerop delcount)
1781             (gnus-message
1782              9
1783              "%d messages were saved the trouble of unregistering and then registering"
1784              delcount))
1785
1786           ;; unregister articles
1787           (unless (zerop (length ulist))
1788             (let ((num (spam-unregister-routine classification backend ulist)))
1789               (when (> num 0)
1790                 (gnus-message
1791                  6
1792                  "%d %s messages were unregistered by backend %s."
1793                  num
1794                  classification
1795                  backend))))
1796
1797             ;; register articles
1798             (unless (zerop (length rlist))
1799               (let ((num (spam-register-routine classification backend rlist)))
1800                 (when (> num 0)
1801                   (gnus-message
1802                    6
1803                    "%d %s messages were registered by backend %s."
1804                    num
1805                    classification
1806                    backend)))))))))
1807
1808 (defun spam-unregister-routine (classification
1809                                 backend
1810                                 specific-articles)
1811   (spam-register-routine classification backend specific-articles t))
1812
1813 (defun spam-register-routine (classification
1814                               backend
1815                               specific-articles
1816                               &optional unregister)
1817   (when (and (spam-classification-valid-p classification)
1818              (spam-backend-valid-p backend))
1819     (let* ((register-function
1820             (spam-backend-function backend classification 'registration))
1821            (unregister-function
1822             (spam-backend-function backend classification 'unregistration))
1823            (run-function (if unregister
1824                              unregister-function
1825                            register-function))
1826            (log-function (if unregister
1827                              'spam-log-undo-registration
1828                            'spam-log-processing-to-registry))
1829            article articles)
1830
1831       (when run-function
1832         ;; make list of articles, using specific-articles if given
1833         (setq articles (or specific-articles
1834                            (spam-list-articles
1835                             gnus-newsgroup-articles
1836                             classification)))
1837         ;; process them
1838         (when (> (length articles) 0)
1839           (gnus-message 5 "%s %d %s articles as %s using backend %s"
1840                         (if unregister "Unregistering" "Registering")
1841                         (length articles)
1842                         (if specific-articles "specific" "")
1843                         classification
1844                         backend)
1845           (funcall run-function articles)
1846           ;; now log all the registrations (or undo them, depending on
1847           ;; unregister)
1848           (dolist (article articles)
1849             (funcall log-function
1850                      (spam-fetch-field-message-id-fast article)
1851                      'process
1852                      classification
1853                      backend
1854                      gnus-newsgroup-name))))
1855       ;; return the number of articles processed
1856       (length articles))))
1857
1858 ;;; log a ham- or spam-processor invocation to the registry
1859 (defun spam-log-processing-to-registry (id type classification backend group)
1860   (when spam-log-to-registry
1861     (if (and (stringp id)
1862              (stringp group)
1863              (spam-process-type-valid-p type)
1864              (spam-classification-valid-p classification)
1865              (spam-backend-valid-p backend))
1866         (let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
1867               (cell (list classification backend group)))
1868           (push cell cell-list)
1869           (gnus-registry-store-extra-entry
1870            id
1871            type
1872            cell-list))
1873
1874       (gnus-error
1875        7
1876        (format "%s call with bad ID, type, classification, spam-backend, or group"
1877                "spam-log-processing-to-registry")))))
1878
1879 ;;; check if a ham- or spam-processor registration has been done
1880 (defun spam-log-registered-p (id type)
1881   (when spam-log-to-registry
1882     (if (and (stringp id)
1883              (spam-process-type-valid-p type))
1884         (cdr-safe (gnus-registry-fetch-extra id type))
1885       (progn
1886         (gnus-error
1887          7
1888          (format "%s called with bad ID, type, classification, or spam-backend"
1889                  "spam-log-registered-p"))
1890         nil))))
1891
1892 ;;; check what a ham- or spam-processor registration says
1893 ;;; returns nil if conflicting registrations are found
1894 (defun spam-log-registration-type (id type)
1895   (let ((count 0)
1896         decision)
1897     (dolist (reg (spam-log-registered-p id type))
1898       (let ((classification (nth 0 reg)))
1899         (when (spam-classification-valid-p classification)
1900           (when (and decision
1901                      (not (eq classification decision)))
1902             (setq count (+ 1 count)))
1903           (setq decision classification))))
1904     (if (< 0 count)
1905         nil
1906       decision)))
1907
1908
1909 ;;; check if a ham- or spam-processor registration needs to be undone
1910 (defun spam-log-unregistration-needed-p (id type classification backend)
1911   (when spam-log-to-registry
1912     (if (and (stringp id)
1913              (spam-process-type-valid-p type)
1914              (spam-classification-valid-p classification)
1915              (spam-backend-valid-p backend))
1916         (let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
1917               found)
1918           (dolist (cell cell-list)
1919             (unless found
1920               (when (and (eq classification (nth 0 cell))
1921                          (eq backend (nth 1 cell)))
1922                 (setq found t))))
1923           found)
1924       (progn
1925         (gnus-error
1926          7
1927          (format "%s called with bad ID, type, classification, or spam-backend"
1928                  "spam-log-unregistration-needed-p"))
1929         nil))))
1930
1931
1932 ;;; undo a ham- or spam-processor registration (the group is not used)
1933 (defun spam-log-undo-registration (id type classification backend &optional group)
1934   (when (and spam-log-to-registry
1935              (spam-log-unregistration-needed-p id type classification backend))
1936     (if (and (stringp id)
1937              (spam-process-type-valid-p type)
1938              (spam-classification-valid-p classification)
1939              (spam-backend-valid-p backend))
1940         (let ((cell-list (cdr-safe (gnus-registry-fetch-extra id type)))
1941               new-cell-list found)
1942           (dolist (cell cell-list)
1943             (unless (and (eq classification (nth 0 cell))
1944                          (eq backend (nth 1 cell)))
1945               (push cell new-cell-list)))
1946           (gnus-registry-store-extra-entry
1947            id
1948            type
1949            new-cell-list))
1950       (progn
1951         (gnus-error 7 (format "%s call with bad ID, type, spam-backend, or group"
1952                               "spam-log-undo-registration"))
1953         nil))))
1954
1955 ;;}}}
1956
1957 ;;{{{ backend functions
1958
1959 ;;{{{ Gmane xrefs
1960 (defun spam-check-gmane-xref ()
1961   (let ((header (or
1962                  (message-fetch-field "Xref")
1963                  (message-fetch-field "Newsgroups"))))
1964     (when header                        ; return nil when no header
1965       (when (string-match spam-gmane-xref-spam-group
1966                           header)
1967           spam-split-group))))
1968
1969 ;;}}}
1970
1971 ;;{{{ Regex body
1972
1973 (defun spam-check-regex-body ()
1974   (let ((spam-regex-headers-ham spam-regex-body-ham)
1975         (spam-regex-headers-spam spam-regex-body-spam))
1976     (spam-check-regex-headers t)))
1977
1978 ;;}}}
1979
1980 ;;{{{ Regex headers
1981
1982 (defun spam-check-regex-headers (&optional body)
1983   (let ((type (if body "body" "header"))
1984         ret found)
1985     (dolist (h-regex spam-regex-headers-ham)
1986       (unless found
1987         (goto-char (point-min))
1988         (when (re-search-forward h-regex nil t)
1989           (message "Ham regex %s search positive." type)
1990           (setq found t))))
1991     (dolist (s-regex spam-regex-headers-spam)
1992       (unless found
1993         (goto-char (point-min))
1994         (when (re-search-forward s-regex nil t)
1995           (message "Spam regex %s search positive." type)
1996           (setq found t)
1997           (setq ret spam-split-group))))
1998     ret))
1999
2000 ;;}}}
2001
2002 ;;{{{ Blackholes.
2003
2004 (defun spam-reverse-ip-string (ip)
2005   (when (stringp ip)
2006     (mapconcat 'identity
2007                (nreverse (split-string ip "\\."))
2008                ".")))
2009
2010 (defun spam-check-blackholes ()
2011   "Check the Received headers for blackholed relays."
2012   (let ((headers (message-fetch-field "received"))
2013         ips matches)
2014     (when headers
2015       (with-temp-buffer
2016         (insert headers)
2017         (goto-char (point-min))
2018         (gnus-message 6 "Checking headers for relay addresses")
2019         (while (re-search-forward
2020                 "\\([0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+\\)" nil t)
2021           (gnus-message 9 "Blackhole search found host IP %s." (match-string 1))
2022           (push (spam-reverse-ip-string (match-string 1))
2023                 ips)))
2024       (dolist (server spam-blackhole-servers)
2025         (dolist (ip ips)
2026           (unless (and spam-blackhole-good-server-regex
2027                        ;; match the good-server-regex against the reversed (again) IP string
2028                        (string-match
2029                         spam-blackhole-good-server-regex
2030                         (spam-reverse-ip-string ip)))
2031             (unless matches
2032               (let ((query-string (concat ip "." server)))
2033                 (if spam-use-dig
2034                     (let ((query-result (query-dig query-string)))
2035                       (when query-result
2036                         (gnus-message 6 "(DIG): positive blackhole check '%s'"
2037                                       query-result)
2038                         (push (list ip server query-result)
2039                               matches)))
2040                   ;; else, if not using dig.el
2041                   (when (query-dns query-string)
2042                     (gnus-message 6 "positive blackhole check")
2043                     (push (list ip server (query-dns query-string 'TXT))
2044                           matches)))))))))
2045     (when matches
2046       spam-split-group)))
2047 ;;}}}
2048
2049 ;;{{{ Hashcash.
2050
2051 (defun spam-check-hashcash ()
2052   "Check the headers for hashcash payments."
2053   (ignore-errors (mail-check-payment)))  ;mail-check-payment returns a boolean
2054
2055 ;;}}}
2056
2057 ;;{{{ BBDB
2058
2059 ;;; original idea for spam-check-BBDB from Alexander Kotelnikov
2060 ;;; <sacha@giotto.sj.ru>
2061
2062 ;; all this is done inside a condition-case to trap errors
2063
2064 (eval-when-compile
2065   (autoload 'bbdb-buffer "bbdb")
2066   (autoload 'bbdb-create-internal "bbdb")
2067   (autoload 'bbdb-search-simple "bbdb"))
2068
2069 (eval-and-compile
2070   (when (condition-case nil
2071             (progn
2072               (require 'bbdb)
2073               (require 'bbdb-com))
2074           (file-error
2075            ;; `bbdb-records' should not be bound as an autoload function
2076            ;; before loading bbdb because of `bbdb-hashtable-size'.
2077            (defalias 'bbdb-records 'ignore)
2078            (defalias 'spam-BBDB-register-routine 'ignore)
2079            (defalias 'spam-enter-ham-BBDB 'ignore)
2080            nil))
2081
2082     ;; when the BBDB changes, we want to clear out our cache
2083     (defun spam-clear-cache-BBDB (&rest immaterial)
2084       (spam-clear-cache 'spam-use-BBDB))
2085
2086     (add-hook 'bbdb-change-hook 'spam-clear-cache-BBDB)
2087
2088     (defun spam-enter-ham-BBDB (addresses &optional remove)
2089       "Enter an address into the BBDB; implies ham (non-spam) sender"
2090       (dolist (from addresses)
2091         (when (stringp from)
2092           (let* ((parsed-address (gnus-extract-address-components from))
2093                  (name (or (nth 0 parsed-address) "Ham Sender"))
2094                  (remove-function (if remove
2095                                       'bbdb-delete-record-internal
2096                                     'ignore))
2097                  (net-address (nth 1 parsed-address))
2098                  (record (and net-address
2099                               (bbdb-search-simple nil net-address))))
2100             (when net-address
2101               (gnus-message 6 "%s address %s %s BBDB"
2102                             (if remove "Deleting" "Adding")
2103                             from
2104                             (if remove "from" "to"))
2105               (if record
2106                   (funcall remove-function record)
2107                 (bbdb-create-internal name nil net-address nil nil
2108                                       "ham sender added by spam.el")))))))
2109
2110     (defun spam-BBDB-register-routine (articles &optional unregister)
2111       (let (addresses)
2112         (dolist (article articles)
2113           (when (stringp (spam-fetch-field-from-fast article))
2114             (push (spam-fetch-field-from-fast article) addresses)))
2115         ;; now do the register/unregister action
2116         (spam-enter-ham-BBDB addresses unregister)))
2117
2118     (defun spam-BBDB-unregister-routine (articles)
2119       (spam-BBDB-register-routine articles t))
2120
2121     (defun spam-check-BBDB ()
2122       "Mail from people in the BBDB is classified as ham or non-spam"
2123       (let ((who (message-fetch-field "from"))
2124             bbdb-cache bbdb-hashtable)
2125         (when spam-cache-lookups
2126           (setq bbdb-cache (gethash 'spam-use-BBDB spam-caches))
2127           (unless bbdb-cache
2128             (setq bbdb-cache (make-vector 17 0)) ; a good starting hash value
2129             ;; this is based on the expanded (bbdb-hashtable) macro
2130             ;; without the debugging support
2131             (with-current-buffer (bbdb-buffer)
2132               (save-excursion
2133                 (save-window-excursion
2134                   (bbdb-records nil t)
2135                   (mapatoms
2136                    (lambda (symbol)
2137                      (intern (downcase (symbol-name symbol)) bbdb-cache))
2138                    bbdb-hashtable))))
2139             (puthash 'spam-use-BBDB bbdb-cache spam-caches)))
2140         (when who
2141           (setq who (nth 1 (gnus-extract-address-components who)))
2142           (if
2143               (if spam-cache-lookups
2144                   (intern-soft (downcase who) bbdb-cache)
2145                 (bbdb-search-simple nil who))
2146               t
2147             (if spam-use-BBDB-exclusive
2148                 spam-split-group
2149               nil)))))))
2150
2151 ;;}}}
2152
2153 ;;{{{ ifile
2154
2155 ;;; check the ifile backend; return nil if the mail was NOT classified
2156 ;;; as spam
2157
2158
2159 (defun spam-get-ifile-database-parameter ()
2160   "Return the command-line parameter for ifile's database.
2161 See `spam-ifile-database'."
2162   (if spam-ifile-database
2163       (format "--db-file=%s" spam-ifile-database)
2164     nil))
2165
2166 (defun spam-check-ifile ()
2167   "Check the ifile backend for the classification of this message."
2168   (let ((article-buffer-name (buffer-name))
2169         category return)
2170     (with-temp-buffer
2171       (let ((temp-buffer-name (buffer-name))
2172             (db-param (spam-get-ifile-database-parameter)))
2173         (save-excursion
2174           (set-buffer article-buffer-name)
2175           (apply 'call-process-region
2176                  (point-min) (point-max) spam-ifile-program
2177                  nil temp-buffer-name nil "-c"
2178                  (if db-param `(,db-param "-q") `("-q"))))
2179         ;; check the return now (we're back in the temp buffer)
2180         (goto-char (point-min))
2181         (if (not (eobp))
2182             (setq category (buffer-substring (point) (point-at-eol))))
2183         (when (not (zerop (length category))) ; we need a category here
2184           (if spam-ifile-all-categories
2185               (setq return category)
2186             ;; else, if spam-ifile-all-categories is not set...
2187             (when (string-equal spam-ifile-spam-category category)
2188               (setq return spam-split-group)))))) ; note return is nil otherwise
2189     return))
2190
2191 (defun spam-ifile-register-with-ifile (articles category &optional unregister)
2192   "Register an article, given as a string, with a category.
2193 Uses `gnus-newsgroup-name' if category is nil (for ham registration)."
2194   (let ((category (or category gnus-newsgroup-name))
2195         (add-or-delete-option (if unregister "-d" "-i"))
2196         (db (spam-get-ifile-database-parameter))
2197         parameters)
2198     (with-temp-buffer
2199       (dolist (article articles)
2200         (let ((article-string (spam-get-article-as-string article)))
2201           (when (stringp article-string)
2202             (insert article-string))))
2203       (apply 'call-process-region
2204              (point-min) (point-max) spam-ifile-program
2205              nil nil nil
2206              add-or-delete-option category
2207              (if db `(,db "-h") `("-h"))))))
2208
2209 (defun spam-ifile-register-spam-routine (articles &optional unregister)
2210   (spam-ifile-register-with-ifile articles spam-ifile-spam-category unregister))
2211
2212 (defun spam-ifile-unregister-spam-routine (articles)
2213   (spam-ifile-register-spam-routine articles t))
2214
2215 (defun spam-ifile-register-ham-routine (articles &optional unregister)
2216   (spam-ifile-register-with-ifile articles spam-ifile-ham-category unregister))
2217
2218 (defun spam-ifile-unregister-ham-routine (articles)
2219   (spam-ifile-register-ham-routine articles t))
2220
2221 ;;}}}
2222
2223 ;;{{{ spam-stat
2224
2225 (eval-when-compile
2226   (autoload 'spam-stat-buffer-change-to-non-spam "spam-stat")
2227   (autoload 'spam-stat-buffer-change-to-spam "spam-stat")
2228   (autoload 'spam-stat-buffer-is-non-spam "spam-stat")
2229   (autoload 'spam-stat-buffer-is-spam "spam-stat")
2230   (autoload 'spam-stat-load "spam-stat")
2231   (autoload 'spam-stat-save "spam-stat")
2232   (autoload 'spam-stat-split-fancy "spam-stat"))
2233
2234 (eval-and-compile
2235   (when (condition-case nil
2236             (let ((spam-stat-install-hooks nil))
2237               (require 'spam-stat))
2238           (file-error
2239            (defalias 'spam-stat-register-ham-routine 'ignore)
2240            (defalias 'spam-stat-register-spam-routine 'ignore)
2241            nil))
2242
2243     (defun spam-check-stat ()
2244       "Check the spam-stat backend for the classification of this message"
2245       (let ((spam-stat-split-fancy-spam-group spam-split-group) ; override
2246             (spam-stat-buffer (buffer-name)) ; stat the current buffer
2247             category return)
2248         (spam-stat-split-fancy)))
2249
2250     (defun spam-stat-register-spam-routine (articles &optional unregister)
2251       (dolist (article articles)
2252         (let ((article-string (spam-get-article-as-string article)))
2253           (with-temp-buffer
2254             (insert article-string)
2255             (if unregister
2256                 (spam-stat-buffer-change-to-non-spam)
2257               (spam-stat-buffer-is-spam))))))
2258
2259     (defun spam-stat-unregister-spam-routine (articles)
2260       (spam-stat-register-spam-routine articles t))
2261
2262     (defun spam-stat-register-ham-routine (articles &optional unregister)
2263       (dolist (article articles)
2264         (let ((article-string (spam-get-article-as-string article)))
2265           (with-temp-buffer
2266             (insert article-string)
2267             (if unregister
2268                 (spam-stat-buffer-change-to-spam)
2269               (spam-stat-buffer-is-non-spam))))))
2270
2271     (defun spam-stat-unregister-ham-routine (articles)
2272       (spam-stat-register-ham-routine articles t))
2273
2274     (defun spam-maybe-spam-stat-load ()
2275       (when spam-use-stat (spam-stat-load)))
2276
2277     (defun spam-maybe-spam-stat-save ()
2278       (when spam-use-stat (spam-stat-save)))))
2279
2280 ;;}}}
2281
2282 ;;{{{ Blacklists and whitelists.
2283
2284 (defvar spam-whitelist-cache nil)
2285 (defvar spam-blacklist-cache nil)
2286
2287 (defun spam-kill-whole-line ()
2288   (beginning-of-line)
2289   (let ((kill-whole-line t))
2290     (kill-line)))
2291
2292 ;;; address can be a list, too
2293 (defun spam-enter-whitelist (address &optional remove)
2294   "Enter ADDRESS (list or single) into the whitelist.
2295 With a non-nil REMOVE, remove them."
2296   (interactive "sAddress: ")
2297   (spam-enter-list address spam-whitelist remove)
2298   (setq spam-whitelist-cache nil)
2299   (spam-clear-cache 'spam-use-whitelist))
2300
2301 ;;; address can be a list, too
2302 (defun spam-enter-blacklist (address &optional remove)
2303   "Enter ADDRESS (list or single) into the blacklist.
2304 With a non-nil REMOVE, remove them."
2305   (interactive "sAddress: ")
2306   (spam-enter-list address spam-blacklist remove)
2307   (setq spam-blacklist-cache nil)
2308   (spam-clear-cache 'spam-use-whitelist))
2309
2310 (defun spam-enter-list (addresses file &optional remove)
2311   "Enter ADDRESSES into the given FILE.
2312 Either the whitelist or the blacklist files can be used.
2313 With a non-nil REMOVE, remove the ADDRESSES."
2314   (if (stringp addresses)
2315       (spam-enter-list (list addresses) file remove)
2316     ;; else, we have a list of addresses here
2317     (unless (file-exists-p (file-name-directory file))
2318       (make-directory (file-name-directory file) t))
2319     (save-excursion
2320       (set-buffer
2321        (find-file-noselect file))
2322       (dolist (a addresses)
2323         (when (stringp a)
2324           (goto-char (point-min))
2325           (if (re-search-forward (regexp-quote a) nil t)
2326               ;; found the address
2327               (when remove
2328                 (spam-kill-whole-line))
2329             ;; else, the address was not found
2330             (unless remove
2331               (goto-char (point-max))
2332               (unless (bobp)
2333                 (insert "\n"))
2334               (insert a "\n")))))
2335       (save-buffer))))
2336
2337 (defun spam-filelist-build-cache (type)
2338   (let ((cache (if (eq type 'spam-use-blacklist)
2339                    spam-blacklist-cache
2340                  spam-whitelist-cache))
2341         parsed-cache)
2342     (unless (gethash type spam-caches)
2343       (while cache
2344         (let ((address (pop cache)))
2345           (unless (zerop (length address)) ; 0 for a nil address too
2346             (setq address (regexp-quote address))
2347             ;; fix regexp-quote's treatment of user-intended regexes
2348             (while (string-match "\\\\\\*" address)
2349               (setq address (replace-match ".*" t t address))))
2350           (push address parsed-cache)))
2351       (puthash type parsed-cache spam-caches))))
2352
2353 (defun spam-filelist-check-cache (type from)
2354   (when (stringp from)
2355     (spam-filelist-build-cache type)
2356     (let (found)
2357       (dolist (address (gethash type spam-caches))
2358         (when (and address (string-match address from))
2359           (setq found t)
2360           (return)))
2361       found)))
2362
2363 ;;; returns t if the sender is in the whitelist, nil or
2364 ;;; spam-split-group otherwise
2365 (defun spam-check-whitelist ()
2366   ;; FIXME!  Should it detect when file timestamps change?
2367   (unless spam-whitelist-cache
2368     (setq spam-whitelist-cache (spam-parse-list spam-whitelist)))
2369   (if (spam-from-listed-p 'spam-use-whitelist)
2370       t
2371     (if spam-use-whitelist-exclusive
2372         spam-split-group
2373       nil)))
2374
2375 (defun spam-check-blacklist ()
2376   ;; FIXME!  Should it detect when file timestamps change?
2377   (unless spam-blacklist-cache
2378     (setq spam-blacklist-cache (spam-parse-list spam-blacklist)))
2379   (and (spam-from-listed-p 'spam-use-blacklist)
2380        spam-split-group))
2381
2382 (defun spam-parse-list (file)
2383   (when (file-readable-p file)
2384     (let (contents address)
2385       (with-temp-buffer
2386         (insert-file-contents file)
2387         (while (not (eobp))
2388           (setq address (buffer-substring (point) (point-at-eol)))
2389           (forward-line 1)
2390           ;; insert the e-mail address if detected, otherwise the raw data
2391           (unless (zerop (length address))
2392             (let ((pure-address (nth 1 (gnus-extract-address-components address))))
2393               (push (or pure-address address) contents)))))
2394       (nreverse contents))))
2395
2396 (defun spam-from-listed-p (type)
2397   (let ((from (message-fetch-field "from"))
2398         found)
2399     (spam-filelist-check-cache type from)))
2400
2401 (defun spam-filelist-register-routine (articles blacklist &optional unregister)
2402   (let ((de-symbol (if blacklist 'spam-use-whitelist 'spam-use-blacklist))
2403         (declassification (if blacklist 'ham 'spam))
2404         (enter-function
2405          (if blacklist 'spam-enter-blacklist 'spam-enter-whitelist))
2406         (remove-function
2407          (if blacklist 'spam-enter-whitelist 'spam-enter-blacklist))
2408         from addresses unregister-list article-unregister-list)
2409     (dolist (article articles)
2410       (let ((from (spam-fetch-field-from-fast article))
2411             (id (spam-fetch-field-message-id-fast article))
2412             sender-ignored)
2413         (when (stringp from)
2414           (dolist (ignore-regex spam-blacklist-ignored-regexes)
2415             (when (and (not sender-ignored)
2416                        (stringp ignore-regex)
2417                        (string-match ignore-regex from))
2418               (setq sender-ignored t)))
2419           ;; remember the messages we need to unregister, unless remove is set
2420           (when (and
2421                  (null unregister)
2422                  (spam-log-unregistration-needed-p
2423                   id 'process declassification de-symbol))
2424             (push article article-unregister-list)
2425             (push from unregister-list))
2426           (unless sender-ignored
2427             (push from addresses)))))
2428
2429     (if unregister
2430         (funcall enter-function addresses t) ; unregister all these addresses
2431       ;; else, register normally and unregister what we need to
2432       (funcall remove-function unregister-list t)
2433       (dolist (article article-unregister-list)
2434         (spam-log-undo-registration
2435          (spam-fetch-field-message-id-fast article)
2436          'process
2437          declassification
2438          de-symbol))
2439       (funcall enter-function addresses nil))))
2440
2441 (defun spam-blacklist-unregister-routine (articles)
2442   (spam-blacklist-register-routine articles t))
2443
2444 (defun spam-blacklist-register-routine (articles &optional unregister)
2445   (spam-filelist-register-routine articles t unregister))
2446
2447 (defun spam-whitelist-unregister-routine (articles)
2448   (spam-whitelist-register-routine articles t))
2449
2450 (defun spam-whitelist-register-routine (articles &optional unregister)
2451   (spam-filelist-register-routine articles nil unregister))
2452
2453 ;;}}}
2454
2455 ;;{{{ Spam-report glue (gmane and resend reporting)
2456 (defun spam-report-gmane-register-routine (articles)
2457   (when articles
2458     (apply 'spam-report-gmane-spam articles)))
2459
2460 (defun spam-report-gmane-unregister-routine (articles)
2461   (when articles
2462     (apply 'spam-report-gmane-ham articles)))
2463
2464 (defun spam-report-resend-register-ham-routine (articles)
2465   (spam-report-resend-register-routine articles t))
2466
2467 (defun spam-report-resend-register-routine (articles &optional ham)
2468   (let* ((resend-to-gp
2469           (if ham
2470               (gnus-parameter-ham-resend-to gnus-newsgroup-name)
2471             (gnus-parameter-spam-resend-to gnus-newsgroup-name)))
2472          (spam-report-resend-to (or (car-safe resend-to-gp)
2473                                     spam-report-resend-to)))
2474     (spam-report-resend articles ham)))
2475
2476 ;;}}}
2477
2478 ;;{{{ Bogofilter
2479 (defun spam-check-bogofilter-headers (&optional score)
2480   (let ((header (message-fetch-field spam-bogofilter-header)))
2481     (when header                        ; return nil when no header
2482       (if score                         ; scoring mode
2483           (if (string-match "spamicity=\\([0-9.]+\\)" header)
2484               (match-string 1 header)
2485             "0")
2486         ;; spam detection mode
2487         (when (string-match spam-bogofilter-bogosity-positive-spam-header
2488                             header)
2489           spam-split-group)))))
2490
2491 ;; return something sensible if the score can't be determined
2492 (defun spam-bogofilter-score (&optional recheck)
2493   "Get the Bogofilter spamicity score."
2494   (interactive "P")
2495   (save-window-excursion
2496     (gnus-summary-show-article t)
2497     (set-buffer gnus-article-buffer)
2498     (let ((score (or (unless recheck
2499                        (spam-check-bogofilter-headers t))
2500                      (spam-check-bogofilter t))))
2501       (gnus-summary-show-article)
2502       (message "Spamicity score %s" score)
2503       (or score "0"))))
2504
2505 (defun spam-verify-bogofilter ()
2506   "Verify the Bogofilter version is sufficient."
2507   (when (eq spam-bogofilter-valid 'unknown)
2508     (setq spam-bogofilter-valid
2509           (not (string-match "^bogofilter version 0\\.\\([0-9]\\|1[01]\\)\\."
2510                              (shell-command-to-string
2511                               (format "%s -V" spam-bogofilter-program))))))
2512   spam-bogofilter-valid)
2513
2514 (defun spam-check-bogofilter (&optional score)
2515   "Check the Bogofilter backend for the classification of this message."
2516   (if (spam-verify-bogofilter)
2517       (let ((article-buffer-name (buffer-name))
2518             (db spam-bogofilter-database-directory)
2519             return)
2520         (with-temp-buffer
2521           (let ((temp-buffer-name (buffer-name)))
2522             (save-excursion
2523               (set-buffer article-buffer-name)
2524               (apply 'call-process-region
2525                      (point-min) (point-max)
2526                      spam-bogofilter-program
2527                      nil temp-buffer-name nil
2528                      (if db `("-d" ,db "-v") `("-v"))))
2529             (setq return (spam-check-bogofilter-headers score))))
2530         return)
2531     (gnus-error 5 "`spam.el' doesn't support obsolete bogofilter versions")))
2532
2533 (defun spam-bogofilter-register-with-bogofilter (articles
2534                                                  spam
2535                                                  &optional unregister)
2536   "Register an article, given as a string, as spam or non-spam."
2537   (if (spam-verify-bogofilter)
2538       (dolist (article articles)
2539         (let ((article-string (spam-get-article-as-string article))
2540               (db spam-bogofilter-database-directory)
2541               (switch (if unregister
2542                           (if spam
2543                               spam-bogofilter-spam-strong-switch
2544                             spam-bogofilter-ham-strong-switch)
2545                         (if spam
2546                             spam-bogofilter-spam-switch
2547                           spam-bogofilter-ham-switch))))
2548           (when (stringp article-string)
2549             (with-temp-buffer
2550               (insert article-string)
2551
2552               (apply 'call-process-region
2553                      (point-min) (point-max)
2554                      spam-bogofilter-program
2555                      nil nil nil switch
2556                      (if db `("-d" ,db "-v") `("-v")))))))
2557     (gnus-error 5 "`spam.el' doesn't support obsolete bogofilter versions")))
2558
2559 (defun spam-bogofilter-register-spam-routine (articles &optional unregister)
2560   (spam-bogofilter-register-with-bogofilter articles t unregister))
2561
2562 (defun spam-bogofilter-unregister-spam-routine (articles)
2563   (spam-bogofilter-register-spam-routine articles t))
2564
2565 (defun spam-bogofilter-register-ham-routine (articles &optional unregister)
2566   (spam-bogofilter-register-with-bogofilter articles nil unregister))
2567
2568 (defun spam-bogofilter-unregister-ham-routine (articles)
2569   (spam-bogofilter-register-ham-routine articles t))
2570
2571
2572 ;;}}}
2573
2574 ;;{{{ spamoracle
2575 (defun spam-check-spamoracle ()
2576   "Run spamoracle on an article to determine whether it's spam."
2577   (let ((article-buffer-name (buffer-name)))
2578     (with-temp-buffer
2579       (let ((temp-buffer-name (buffer-name)))
2580         (save-excursion
2581           (set-buffer article-buffer-name)
2582           (let ((status
2583                  (apply 'call-process-region
2584                         (point-min) (point-max)
2585                         spam-spamoracle-binary
2586                         nil temp-buffer-name nil
2587                         (if spam-spamoracle-database
2588                             `("-f" ,spam-spamoracle-database "mark")
2589                           '("mark")))))
2590             (if (eq 0 status)
2591                 (progn
2592                   (set-buffer temp-buffer-name)
2593                   (goto-char (point-min))
2594                   (when (re-search-forward "^X-Spam: yes;" nil t)
2595                     spam-split-group))
2596               (error "Error running spamoracle: %s" status))))))))
2597
2598 (defun spam-spamoracle-learn (articles article-is-spam-p &optional unregister)
2599   "Run spamoracle in training mode."
2600   (with-temp-buffer
2601     (let ((temp-buffer-name (buffer-name)))
2602       (save-excursion
2603         (goto-char (point-min))
2604         (dolist (article articles)
2605           (insert (spam-get-article-as-string article)))
2606         (let* ((arg (if (spam-xor unregister article-is-spam-p)
2607                         "-spam"
2608                       "-good"))
2609                (status
2610                 (apply 'call-process-region
2611                        (point-min) (point-max)
2612                        spam-spamoracle-binary
2613                        nil temp-buffer-name nil
2614                        (if spam-spamoracle-database
2615                            `("-f" ,spam-spamoracle-database
2616                              "add" ,arg)
2617                          `("add" ,arg)))))
2618           (unless (eq 0 status)
2619             (error "Error running spamoracle: %s" status)))))))
2620
2621 (defun spam-spamoracle-learn-ham (articles &optional unregister)
2622   (spam-spamoracle-learn articles nil unregister))
2623
2624 (defun spam-spamoracle-unlearn-ham (articles &optional unregister)
2625   (spam-spamoracle-learn-ham articles t))
2626
2627 (defun spam-spamoracle-learn-spam (articles &optional unregister)
2628   (spam-spamoracle-learn articles t unregister))
2629
2630 (defun spam-spamoracle-unlearn-spam (articles &optional unregister)
2631   (spam-spamoracle-learn-spam articles t))
2632
2633 ;;}}}
2634
2635 ;;{{{ SpamAssassin
2636 ;;; based mostly on the bogofilter code
2637 (defun spam-check-spamassassin-headers (&optional score)
2638   "Check the SpamAssassin headers for the classification of this message."
2639   (if score                             ; scoring mode
2640       (let ((header (message-fetch-field spam-spamassassin-spam-status-header)))
2641         (when header
2642           (if (string-match spam-spamassassin-score-regexp header)
2643               (match-string 1 header)
2644             "0")))
2645     ;; spam detection mode
2646     (let ((header (message-fetch-field spam-spamassassin-spam-flag-header)))
2647           (when header                  ; return nil when no header
2648             (when (string-match spam-spamassassin-positive-spam-flag-header
2649                                 header)
2650               spam-split-group)))))
2651
2652 (defun spam-check-spamassassin (&optional score)
2653   "Check the SpamAssassin backend for the classification of this message."
2654   (let ((article-buffer-name (buffer-name)))
2655     (with-temp-buffer
2656       (let ((temp-buffer-name (buffer-name)))
2657         (save-excursion
2658           (set-buffer article-buffer-name)
2659           (apply 'call-process-region
2660                  (point-min) (point-max) spam-assassin-program
2661                  nil temp-buffer-name nil spam-spamassassin-arguments))
2662         ;; check the return now (we're back in the temp buffer)
2663         (goto-char (point-min))
2664         (spam-check-spamassassin-headers score)))))
2665
2666 ;; return something sensible if the score can't be determined
2667 (defun spam-spamassassin-score (&optional recheck)
2668   "Get the SpamAssassin score"
2669   (interactive "P")
2670   (save-window-excursion
2671     (gnus-summary-show-article t)
2672     (set-buffer gnus-article-buffer)
2673     (let ((score (or (unless recheck
2674                        (spam-check-spamassassin-headers t))
2675                      (spam-check-spamassassin t))))
2676       (gnus-summary-show-article)
2677       (message "SpamAssassin score %s" score)
2678       (or score "0"))))
2679
2680 (defun spam-spamassassin-register-with-sa-learn (articles spam
2681                                                  &optional unregister)
2682   "Register articles with spamassassin's sa-learn as spam or non-spam."
2683   (if articles
2684       (let ((action (if unregister spam-sa-learn-unregister-switch
2685                       (if spam spam-sa-learn-spam-switch
2686                         spam-sa-learn-ham-switch)))
2687             (summary-buffer-name (buffer-name)))
2688         (with-temp-buffer
2689           ;; group the articles into mbox format
2690           (dolist (article articles)
2691             (let (article-string)
2692               (save-excursion
2693                 (set-buffer summary-buffer-name)
2694                 (setq article-string (spam-get-article-as-string article)))
2695               (when (stringp article-string)
2696                 (insert "From \n") ; mbox separator (sa-learn only checks the
2697                                    ; first five chars, so we can get away with
2698                                    ; a bogus line))
2699                 (insert article-string)
2700                 (insert "\n"))))
2701           ;; call sa-learn on all messages at the same time
2702           (apply 'call-process-region
2703                  (point-min) (point-max)
2704                  spam-sa-learn-program
2705                  nil nil nil "--mbox"
2706                  (if spam-sa-learn-rebuild
2707                      (list action)
2708                    `("--no-rebuild" ,action)))))))
2709
2710 (defun spam-spamassassin-register-spam-routine (articles &optional unregister)
2711   (spam-spamassassin-register-with-sa-learn articles t unregister))
2712
2713 (defun spam-spamassassin-register-ham-routine (articles &optional unregister)
2714   (spam-spamassassin-register-with-sa-learn articles nil unregister))
2715
2716 (defun spam-spamassassin-unregister-spam-routine (articles)
2717   (spam-spamassassin-register-with-sa-learn articles t t))
2718
2719 (defun spam-spamassassin-unregister-ham-routine (articles)
2720   (spam-spamassassin-register-with-sa-learn articles nil t))
2721
2722 ;;}}}
2723
2724 ;;{{{ Bsfilter
2725 ;;; based mostly on the bogofilter code
2726 (defun spam-check-bsfilter-headers (&optional score)
2727   (if score
2728       (or (nnmail-fetch-field spam-bsfilter-probability-header)
2729           "0")
2730     (let ((header (nnmail-fetch-field spam-bsfilter-header)))
2731       (when header ; return nil when no header
2732         (when (string-match "YES" header)
2733           spam-split-group)))))
2734
2735 ;; return something sensible if the score can't be determined
2736 (defun spam-bsfilter-score (&optional recheck)
2737   "Get the Bsfilter spamicity score."
2738   (interactive "P")
2739   (save-window-excursion
2740     (gnus-summary-show-article t)
2741     (set-buffer gnus-article-buffer)
2742     (let ((score (or (unless recheck
2743                        (spam-check-bsfilter-headers t))
2744                      (spam-check-bsfilter t))))
2745       (gnus-summary-show-article)
2746       (message "Spamicity score %s" score)
2747       (or score "0"))))
2748
2749 (defun spam-check-bsfilter (&optional score)
2750   "Check the Bsfilter backend for the classification of this message."
2751   (let ((article-buffer-name (buffer-name))
2752         (dir spam-bsfilter-database-directory)
2753         return)
2754     (with-temp-buffer
2755       (let ((temp-buffer-name (buffer-name)))
2756         (save-excursion
2757           (set-buffer article-buffer-name)
2758           (apply 'call-process-region
2759                  (point-min) (point-max)
2760                  spam-bsfilter-program
2761                  nil temp-buffer-name nil
2762                  "--pipe"
2763                  "--insert-flag"
2764                  "--insert-probability"
2765                  (when dir
2766                    (list "--homedir" dir))))
2767         (setq return (spam-check-bsfilter-headers score))))
2768     return))
2769
2770 (defun spam-bsfilter-register-with-bsfilter (articles
2771                                              spam
2772                                              &optional unregister)
2773   "Register an article, given as a string, as spam or non-spam."
2774   (dolist (article articles)
2775     (let ((article-string (spam-get-article-as-string article))
2776           (switch (if unregister
2777                       (if spam
2778                           spam-bsfilter-spam-strong-switch
2779                         spam-bsfilter-ham-strong-switch)
2780                     (if spam
2781                         spam-bsfilter-spam-switch
2782                       spam-bsfilter-ham-switch))))
2783       (when (stringp article-string)
2784         (with-temp-buffer
2785           (insert article-string)
2786           (apply 'call-process-region
2787                  (point-min) (point-max)
2788                  spam-bsfilter-program
2789                  nil nil nil switch
2790                  "--update"
2791                  (when spam-bsfilter-database-directory
2792                    (list "--homedir"
2793                          spam-bsfilter-database-directory))))))))
2794
2795 (defun spam-bsfilter-register-spam-routine (articles &optional unregister)
2796   (spam-bsfilter-register-with-bsfilter articles t unregister))
2797
2798 (defun spam-bsfilter-unregister-spam-routine (articles)
2799   (spam-bsfilter-register-spam-routine articles t))
2800
2801 (defun spam-bsfilter-register-ham-routine (articles &optional unregister)
2802   (spam-bsfilter-register-with-bsfilter articles nil unregister))
2803
2804 (defun spam-bsfilter-unregister-ham-routine (articles)
2805   (spam-bsfilter-register-ham-routine articles t))
2806
2807 ;;}}}
2808
2809 ;;{{{ CRM114 Mailfilter
2810 (defun spam-check-crm114-headers (&optional score)
2811   (let ((header (message-fetch-field spam-crm114-header)))
2812     (when header                        ; return nil when no header
2813       (if score                         ; scoring mode
2814           (if (string-match "( pR: \\([0-9.-]+\\)" header)
2815               (match-string 1 header)
2816             "0")
2817         ;; spam detection mode
2818         (when (string-match spam-crm114-positive-spam-header
2819                             header)
2820           spam-split-group)))))
2821
2822 ;; return something sensible if the score can't be determined
2823 (defun spam-crm114-score ()
2824   "Get the CRM114 Mailfilter pR."
2825   (interactive)
2826   (save-window-excursion
2827     (gnus-summary-show-article t)
2828     (set-buffer gnus-article-buffer)
2829     (let ((score (or (spam-check-crm114-headers t)
2830                      (spam-check-crm114 t))))
2831       (gnus-summary-show-article)
2832       (message "pR: %s" score)
2833       (or score "0"))))
2834
2835 (defun spam-check-crm114 (&optional score)
2836   "Check the CRM114 Mailfilter backend for the classification of this message."
2837   (let ((article-buffer-name (buffer-name))
2838         (db spam-crm114-database-directory)
2839         return)
2840     (with-temp-buffer
2841       (let ((temp-buffer-name (buffer-name)))
2842         (save-excursion
2843           (set-buffer article-buffer-name)
2844           (apply 'call-process-region
2845                  (point-min) (point-max)
2846                  spam-crm114-program
2847                  nil temp-buffer-name nil
2848                  (when db (list (concat "--fileprefix=" db)))))
2849         (setq return (spam-check-crm114-headers score))))
2850     return))
2851
2852 (defun spam-crm114-register-with-crm114 (articles
2853                                          spam
2854                                          &optional unregister)
2855   "Register an article, given as a string, as spam or non-spam."
2856   (dolist (article articles)
2857     (let ((article-string (spam-get-article-as-string article))
2858           (db spam-crm114-database-directory)
2859           (switch (if unregister
2860                       (if spam
2861                           spam-crm114-spam-strong-switch
2862                         spam-crm114-ham-strong-switch)
2863                     (if spam
2864                         spam-crm114-spam-switch
2865                       spam-crm114-ham-switch))))
2866       (when (stringp article-string)
2867         (with-temp-buffer
2868           (insert article-string)
2869
2870           (apply 'call-process-region
2871                  (point-min) (point-max)
2872                  spam-crm114-program
2873                  nil nil nil
2874                  (when db (list switch (concat "--fileprefix=" db)))))))))
2875
2876 (defun spam-crm114-register-spam-routine (articles &optional unregister)
2877   (spam-crm114-register-with-crm114 articles t unregister))
2878
2879 (defun spam-crm114-unregister-spam-routine (articles)
2880   (spam-crm114-register-spam-routine articles t))
2881
2882 (defun spam-crm114-register-ham-routine (articles &optional unregister)
2883   (spam-crm114-register-with-crm114 articles nil unregister))
2884
2885 (defun spam-crm114-unregister-ham-routine (articles)
2886   (spam-crm114-register-ham-routine articles t))
2887
2888 ;;}}}
2889
2890 ;;}}}
2891
2892 ;;{{{ Hooks
2893
2894 ;;;###autoload
2895 (defun spam-initialize (&rest symbols)
2896   "Install the spam.el hooks and do other initialization.
2897 When SYMBOLS is given, set those variables to t.  This is so you
2898 can call `spam-initialize' before you set spam-use-* variables on
2899 explicitly, and matters only if you need the extra headers
2900 installed through `spam-necessary-extra-headers'."
2901   (interactive)
2902
2903   (dolist (var symbols)
2904     (set var t))
2905
2906   (dolist (header (spam-necessary-extra-headers))
2907     (add-to-list 'nnmail-extra-headers header)
2908     (add-to-list 'gnus-extra-headers header))
2909
2910   (setq spam-install-hooks t)
2911   ;; TODO: How do we redo this every time the `spam' face is customized?
2912   (push '((eq mark gnus-spam-mark) . spam)
2913         gnus-summary-highlight)
2914   ;; Add hooks for loading and saving the spam stats
2915   (add-hook 'gnus-save-newsrc-hook 'spam-maybe-spam-stat-save)
2916   (add-hook 'gnus-get-top-new-news-hook 'spam-maybe-spam-stat-load)
2917   (add-hook 'gnus-startup-hook 'spam-maybe-spam-stat-load)
2918   (add-hook 'gnus-summary-prepare-exit-hook 'spam-summary-prepare-exit)
2919   (add-hook 'gnus-summary-prepare-hook 'spam-summary-prepare)
2920   (add-hook 'gnus-get-new-news-hook 'spam-setup-widening)
2921   (add-hook 'gnus-summary-prepared-hook 'spam-find-spam))
2922
2923 (defun spam-unload-hook ()
2924   "Uninstall the spam.el hooks."
2925   (interactive)
2926   (remove-hook 'gnus-save-newsrc-hook 'spam-maybe-spam-stat-save)
2927   (remove-hook 'gnus-get-top-new-news-hook 'spam-maybe-spam-stat-load)
2928   (remove-hook 'gnus-startup-hook 'spam-maybe-spam-stat-load)
2929   (remove-hook 'gnus-summary-prepare-exit-hook 'spam-summary-prepare-exit)
2930   (remove-hook 'gnus-summary-prepare-hook 'spam-summary-prepare)
2931   (remove-hook 'gnus-get-new-news-hook 'spam-setup-widening)
2932   (remove-hook 'gnus-summary-prepare-hook 'spam-find-spam))
2933
2934 (add-hook 'spam-unload-hook 'spam-unload-hook)
2935
2936 (when spam-install-hooks
2937   (spam-initialize))
2938 ;;}}}
2939
2940 (provide 'spam)
2941
2942 ;;; arch-tag: 07e6e0ca-ab0a-4412-b445-1f6c72a4f27f
2943 ;;; spam.el ends here