;;; gnus-nocem.el --- NoCeM pseudo-cancellation treatment
-;; Copyright (C) 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1995,96 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; Keywords: news
;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; 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)
-(eval-when-compile
- (require 'cl))
+(require 'gnus-load)
+(require 'nnmail)
+(require 'gnus-art)
+(require 'gnus-range)
-(defvar gnus-nocem-groups '("alt.nocem.misc" "news.admin.net-abuse.announce")
+(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" "clewis@ferret.ocunix.on.ca;")
+(defvar gnus-nocem-issuers
+ '("AutoMoose-1" "Automoose-1" ; CancelMoose[tm]
+ "rbraver@ohww.norman.ok.us" ; Robert Braver
+ "clewis@ferret.ocunix.on.ca;" ; Chris Lewis
+ "jem@xpat.com;" ; Despammer from Korea
+ "snowhare@xmission.com" ; Benjamin "Snowhare" Franz
+ "red@redpoll.mrfs.oh.us (Richard E. Depew)"
+ )
"*List of NoCeM issuers to pay attention to.")
(defvar gnus-nocem-directory
- (concat (file-name-as-directory gnus-article-save-directory) "NoCeM/")
+ (nnheader-concat gnus-article-save-directory "NoCeM/")
"*Directory where NoCeM files will be stored.")
-(defvar gnus-nocem-expiry-wait 30
+(defvar gnus-nocem-expiry-wait 15
"*Number of days to keep NoCeM headers in the cache.")
+(defvar gnus-nocem-verifyer 'mc-verify
+ "*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
(interactive)
(let ((groups gnus-nocem-groups)
group active gactive articles)
- (or (file-exists-p gnus-nocem-directory)
- (make-directory gnus-nocem-directory t))
+ (gnus-make-directory gnus-nocem-directory)
;; Load any previous NoCeM headers.
(gnus-nocem-load-cache)
;; Read the active file if it hasn't been read yet.
(error nil)))
;; Go through all groups and see whether new articles have
;; arrived.
- (while groups
- (setq group (pop groups))
- (if (not (gnus-activate-group group))
- () ; This group doesn't exist.
+ (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 (setq gactive (gnus-gethash
- group gnus-newsrc-hashtb))))))
+ (< (cdr active) (cdr gactive))))
;; Ok, there are new articles in this group, se we fetch the
;; headers.
- (let ((gnus-newsgroup-dependencies (make-vector 10))
- headers)
- (setq headers
- (if (eq 'nov
- (gnus-retrieve-headers
- (setq articles
- (gnus-uncompress-range
- (cons (1+ (cdr active)) (cdr gactive))))
- group))
- (gnus-get-newsgroup-headers-xover articles)
- (gnus-get-newsgroup-headers)))
- (while headers
- ;; We take a closer look on all articles that have
- ;; "@@NCM" in the subject.
- (and (string-match "@@NCM" (mail-header-subject (car headers)))
- (gnus-nocem-check-article
- (mail-header-number (car headers)) group))
- (setq headers (cdr headers)))))))
+ (save-excursion
+ (let ((dependencies (make-vector 10 nil))
+ headers)
+ (nnheader-temp-write nil
+ (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)))))))
+ (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)))
-
-(defun gnus-nocem-check-article (number group)
- "Check whether the current article is a NCM article and that we want it."
- (save-excursion
- (set-buffer nntp-server-buffer)
- ;; Get the article.
- (gnus-request-article-this-buffer number group)
- (goto-char (point-min))
- (let (issuer b)
+ (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))
+ (when (re-search-forward "-----BEGIN PGP MESSAGE-----" nil t)
+ (delete-region (point-min) (match-beginning 0)))
+ (when (re-search-forward "-----END PGP MESSAGE-----\n?" nil t)
+ (delete-region (match-end 0) (point-max)))
+ (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))
- (search-forward "\n@@BEGIN NCM BODY\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 (match-beginning 0))
+ (narrow-to-region b e)
(setq issuer (mail-fetch-field "issuer"))
+ (widen)
(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.
- (widen)))
-
+ (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."
- t)
+ (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."
- (widen)
(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))
(narrow-to-region b (1+ (match-beginning 0)))
(goto-char (point-min))
(while (search-forward "\t" nil t)
- (when (boundp (let ((obarray gnus-newsrc-hashtb)) (read buf)))
+ (when (condition-case nil
+ (boundp (let ((obarray gnus-active-hashtb)) (read buf)))
+ (error nil))
(beginning-of-line)
(while (= (following-char) ?\t)
(forward-line -1))
(forward-line 1))))
(when ncm
(setq gnus-nocem-touched-alist t)
- (push (push (current-time-string) ncm) gnus-nocem-alist)))))
+ (push (cons (let ((time (current-time))) (setcdr (cdr time) nil) time)
+ ncm)
+ gnus-nocem-alist)))))
(defun gnus-nocem-load-cache ()
"Load the NoCeM cache."
- (if gnus-nocem-alist
- () ; Do nothing.
+ (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))
"Save the NoCeM cache."
(when (and gnus-nocem-alist
gnus-nocem-touched-alist)
- (save-excursion
- (nnheader-set-temp-buffer " *NoCeM*")
- (insert (prin1-to-string
- (list 'setq 'gnus-nocem-alist gnus-nocem-alist)))
- (write-region (point-min) (point-max)
- (gnus-nocem-cache-file) nil 'silent)
- (kill-buffer (current-buffer))
- (setq gnus-nocem-touched-alist nil))))
+ (nnheader-temp-write (gnus-nocem-cache-file)
+ (gnus-prin1 `(setq gnus-nocem-alist ',gnus-nocem-alist)))
+ (setq gnus-nocem-touched-alist nil)))
+
+(defun gnus-nocem-save-active ()
+ "Save the NoCeM active file."
+ (nnheader-temp-write (gnus-nocem-active-file)
+ (gnus-prin1 `(setq gnus-nocem-active ',gnus-nocem-active))))
(defun gnus-nocem-alist-to-hashtb ()
"Create a hashtable from the Message-IDs we have."
- (let ((alist gnus-nocem-alist)
- (date (current-time-string))
- entry)
- (setq gnus-nocem-hashtb (* (length alist) 51))
- (while alist
- (setq entry (pop alist))
- (if (> (gnus-days-between date (car entry)) gnus-nocem-expiry-wait)
+ (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.
- (setq gnus-nocem-alist (delq entry gnus-nocem-alist))
+ (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 entry (cdr entry))))
+ (setq alist (cdr alist)))))
+
+(gnus-add-shutdown 'gnus-nocem-close 'gnus)
(defun gnus-nocem-close ()
"Clear internal NoCeM variables."
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
projects / gnus / blobdiff