mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
248 lines
8.4 KiB
EmacsLisp
248 lines
8.4 KiB
EmacsLisp
;;; gnus-nocem.el --- NoCeM pseudo-cancellation treatment
|
|
;; Copyright (C) 1995,96 Free Software Foundation, Inc.
|
|
|
|
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
|
|
;; Keywords: news
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs is free software; you can redistribute it and/or modify
|
|
;; it under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation; either version 2, or (at your option)
|
|
;; any later version.
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with GNU Emacs; see the file COPYING. If not, write to the
|
|
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;;; Code:
|
|
|
|
(require 'gnus)
|
|
(require 'nnmail)
|
|
(eval-when-compile (require 'cl))
|
|
|
|
(defvar gnus-nocem-groups
|
|
'("alt.nocem.misc" "news.admin.net-abuse.announce")
|
|
"*List of groups that will be searched for NoCeM messages.")
|
|
|
|
(defvar gnus-nocem-issuers
|
|
'("Automoose-1" ; The CancelMoose[tm] on autopilot.
|
|
"clewis@ferret.ocunix.on.ca;" ; Chris Lewis -- Canadian angel & despammer.
|
|
"jem@xpat.com;" ; John Milburn -- despammer in Korea.
|
|
"red@redpoll.mrfs.oh.us (Richard E. Depew)" ; Spew/bincancel guy.
|
|
)
|
|
"*List of NoCeM issuers to pay attention to.")
|
|
|
|
(defvar gnus-nocem-directory
|
|
(concat (file-name-as-directory gnus-article-save-directory) "NoCeM/")
|
|
"*Directory where NoCeM files will be stored.")
|
|
|
|
(defvar gnus-nocem-expiry-wait 15
|
|
"*Number of days to keep NoCeM headers in the cache.")
|
|
|
|
(defvar gnus-nocem-verifyer nil
|
|
"*Function called to verify that the NoCeM message is valid.
|
|
One likely value is `mc-verify'. If the function in this variable
|
|
isn't bound, the message will be used unconditionally.")
|
|
|
|
;;; Internal variables
|
|
|
|
(defvar gnus-nocem-active nil)
|
|
(defvar gnus-nocem-alist nil)
|
|
(defvar gnus-nocem-touched-alist nil)
|
|
(defvar gnus-nocem-hashtb nil)
|
|
|
|
;;; Functions
|
|
|
|
(defun gnus-nocem-active-file ()
|
|
(concat (file-name-as-directory gnus-nocem-directory) "active"))
|
|
|
|
(defun gnus-nocem-cache-file ()
|
|
(concat (file-name-as-directory gnus-nocem-directory) "cache"))
|
|
|
|
(defun gnus-nocem-scan-groups ()
|
|
"Scan all NoCeM groups for new NoCeM messages."
|
|
(interactive)
|
|
(let ((groups gnus-nocem-groups)
|
|
group active gactive articles)
|
|
(or (file-exists-p gnus-nocem-directory)
|
|
(make-directory gnus-nocem-directory t))
|
|
;; Load any previous NoCeM headers.
|
|
(gnus-nocem-load-cache)
|
|
;; Read the active file if it hasn't been read yet.
|
|
(and (file-exists-p (gnus-nocem-active-file))
|
|
(not gnus-nocem-active)
|
|
(condition-case ()
|
|
(load (gnus-nocem-active-file) t t t)
|
|
(error nil)))
|
|
;; Go through all groups and see whether new articles have
|
|
;; arrived.
|
|
(while (setq group (pop groups))
|
|
(if (not (setq gactive (gnus-activate-group group)))
|
|
() ; This group doesn't exist.
|
|
(setq active (nth 1 (assoc group gnus-nocem-active)))
|
|
(when (and (not (< (cdr gactive) (car gactive))) ; Empty group.
|
|
(or (not active)
|
|
(< (cdr active) (cdr gactive))))
|
|
;; Ok, there are new articles in this group, se we fetch the
|
|
;; headers.
|
|
(save-excursion
|
|
(let ((dependencies (make-vector 10 nil))
|
|
(buffer (nnheader-set-temp-buffer " *Gnus NoCeM*"))
|
|
headers)
|
|
(setq headers
|
|
(if (eq 'nov
|
|
(gnus-retrieve-headers
|
|
(setq articles
|
|
(gnus-uncompress-range
|
|
(cons
|
|
(if active (1+ (cdr active))
|
|
(car gactive))
|
|
(cdr gactive))))
|
|
group))
|
|
(gnus-get-newsgroup-headers-xover
|
|
articles nil dependencies)
|
|
(gnus-get-newsgroup-headers dependencies)))
|
|
(while headers
|
|
;; We take a closer look on all articles that have
|
|
;; "@@NCM" in the subject.
|
|
(when (string-match "@@NCM"
|
|
(mail-header-subject (car headers)))
|
|
(gnus-nocem-check-article group (car headers)))
|
|
(setq headers (cdr headers)))
|
|
(kill-buffer (current-buffer)))))
|
|
(setq gnus-nocem-active
|
|
(cons (list group gactive)
|
|
(delq (assoc group gnus-nocem-active)
|
|
gnus-nocem-active)))))
|
|
;; Save the results, if any.
|
|
(gnus-nocem-save-cache)
|
|
(gnus-nocem-save-active)))
|
|
|
|
(defun gnus-nocem-check-article (group header)
|
|
"Check whether the current article is an NCM article and that we want it."
|
|
;; Get the article.
|
|
(gnus-message 7 "Checking article %d in %s for NoCeM..."
|
|
(mail-header-number header) group)
|
|
(let ((date (mail-header-date header))
|
|
issuer b e)
|
|
(when (or (not date)
|
|
(nnmail-time-less
|
|
(nnmail-time-since (nnmail-date-to-time date))
|
|
(nnmail-days-to-time gnus-nocem-expiry-wait)))
|
|
(gnus-request-article-this-buffer (mail-header-number header) group)
|
|
(goto-char (point-min))
|
|
;; The article has to have proper NoCeM headers.
|
|
(when (and (setq b (search-forward "\n@@BEGIN NCM HEADERS\n" nil t))
|
|
(setq e (search-forward "\n@@BEGIN NCM BODY\n" nil t)))
|
|
;; We get the name of the issuer.
|
|
(narrow-to-region b e)
|
|
(setq issuer (mail-fetch-field "issuer"))
|
|
(and (member issuer gnus-nocem-issuers) ; We like her...
|
|
(gnus-nocem-verify-issuer issuer) ; She is who she says she is..
|
|
(gnus-nocem-enter-article)))))) ; We gobble the message.
|
|
|
|
(defun gnus-nocem-verify-issuer (person)
|
|
"Verify using PGP that the canceler is who she says she is."
|
|
(widen)
|
|
(if (fboundp gnus-nocem-verifyer)
|
|
(funcall gnus-nocem-verifyer)
|
|
;; If we don't have MailCrypt, then we use the message anyway.
|
|
t))
|
|
|
|
(defun gnus-nocem-enter-article ()
|
|
"Enter the current article into the NoCeM cache."
|
|
(goto-char (point-min))
|
|
(let ((b (search-forward "\n@@BEGIN NCM BODY\n" nil t))
|
|
(e (search-forward "\n@@END NCM BODY\n" nil t))
|
|
(buf (current-buffer))
|
|
ncm id)
|
|
(when (and b e)
|
|
(narrow-to-region b (1+ (match-beginning 0)))
|
|
(goto-char (point-min))
|
|
(while (search-forward "\t" nil t)
|
|
(when (condition-case nil
|
|
(boundp (let ((obarray gnus-active-hashtb)) (read buf)))
|
|
(error nil))
|
|
(beginning-of-line)
|
|
(while (= (following-char) ?\t)
|
|
(forward-line -1))
|
|
(setq id (buffer-substring (point) (1- (search-forward "\t"))))
|
|
(push id ncm)
|
|
(gnus-sethash id t gnus-nocem-hashtb)
|
|
(forward-line 1)
|
|
(while (= (following-char) ?\t)
|
|
(forward-line 1))))
|
|
(when ncm
|
|
(setq gnus-nocem-touched-alist t)
|
|
(push (cons (let ((time (current-time))) (setcdr (cdr time) nil) time)
|
|
ncm)
|
|
gnus-nocem-alist)))))
|
|
|
|
(defun gnus-nocem-load-cache ()
|
|
"Load the NoCeM cache."
|
|
(unless gnus-nocem-alist
|
|
;; The buffer doesn't exist, so we create it and load the NoCeM
|
|
;; cache.
|
|
(when (file-exists-p (gnus-nocem-cache-file))
|
|
(load (gnus-nocem-cache-file) t t t)
|
|
(gnus-nocem-alist-to-hashtb))))
|
|
|
|
(defun gnus-nocem-save-cache ()
|
|
"Save the NoCeM cache."
|
|
(when (and gnus-nocem-alist
|
|
gnus-nocem-touched-alist)
|
|
(nnheader-temp-write (gnus-nocem-cache-file)
|
|
(prin1 `(setq gnus-nocem-alist ',gnus-nocem-alist) (current-buffer)))
|
|
(setq gnus-nocem-touched-alist nil)))
|
|
|
|
(defun gnus-nocem-save-active ()
|
|
"Save the NoCeM active file."
|
|
(nnheader-temp-write (gnus-nocem-active-file)
|
|
(prin1 `(setq gnus-nocem-active ',gnus-nocem-active) (current-buffer))))
|
|
|
|
(defun gnus-nocem-alist-to-hashtb ()
|
|
"Create a hashtable from the Message-IDs we have."
|
|
(let* ((alist gnus-nocem-alist)
|
|
(pprev (cons nil alist))
|
|
(prev pprev)
|
|
(expiry (nnmail-days-to-time gnus-nocem-expiry-wait))
|
|
entry)
|
|
(setq gnus-nocem-hashtb (gnus-make-hashtable (* (length alist) 51)))
|
|
(while (setq entry (car alist))
|
|
(if (not (nnmail-time-less (nnmail-time-since (car entry)) expiry))
|
|
;; This entry has expired, so we remove it.
|
|
(setcdr prev (cdr alist))
|
|
(setq prev alist)
|
|
;; This is ok, so we enter it into the hashtable.
|
|
(setq entry (cdr entry))
|
|
(while entry
|
|
(gnus-sethash (car entry) t gnus-nocem-hashtb)
|
|
(setq entry (cdr entry))))
|
|
(setq alist (cdr alist)))))
|
|
|
|
(gnus-add-shutdown 'gnus-nocem-close 'gnus)
|
|
|
|
(defun gnus-nocem-close ()
|
|
"Clear internal NoCeM variables."
|
|
(setq gnus-nocem-alist nil
|
|
gnus-nocem-hashtb nil
|
|
gnus-nocem-active nil
|
|
gnus-nocem-touched-alist nil))
|
|
|
|
(defun gnus-nocem-unwanted-article-p (id)
|
|
"Say whether article ID in the current group is wanted."
|
|
(gnus-gethash id gnus-nocem-hashtb))
|
|
|
|
(provide 'gnus-nocem)
|
|
|
|
;;; gnus-nocem.el ends here
|