(require 'rmail)
(require 'nnmail)
+(defvar nndoc-article-type 'mbox
+ "*Type of the file.
+One of `mbox', `babyl', `digest', `news', `rnews', `mmdf',
+`forward', `mime-digest', `standard-digest', `slack-digest', or
+`guess'.")
+
+(defvar nndoc-type-alist
+ `((mmdf
+ (article-begin . "^\^A\^A\^A\^A\n")
+ (body-end . "^\^A\^A\^A\^A\n"))
+ (news
+ (article-begin . "^Path:"))
+ (rnews
+ (article-begin . "^#! *rnews +\\([0-9]\\)+ *\n")
+ (body-end-function . nndoc-rnews-body-end))
+ (mbox
+ (article-begin .
+ ,(let ((delim (concat "^" rmail-unix-mail-delimiter)))
+ (if (string-match "\n\\'" delim)
+ (substring delim 0 (match-beginning 0))
+ delim)))
+ (body-end-function . nndoc-mbox-body-end))
+ (babyl
+ (article-begin . "\^_\^L *\n")
+ (body-end . "\^_")
+ (head-begin . "^[0-9].*\n"))
+ (forward
+ (article-begin . "^-+ Start of forwarded message -+\n+")
+ (body-end . "^-+ End of forwarded message -+\n"))
+ (slack-digest
+ (article-begin . "^------------------------------*[\n \t]+")
+ (head-end . "^ ?$")
+ (body-begin . "^ ?$")
+ (file-end . "^End of")
+ (prepare-body . nndoc-prepare-digest-body))
+ (mime-digest
+ (article-begin . "")
+ (body-end . "")
+ (file-end . ""))
+ (standard-digest
+ (first-article . ,(concat "^" (make-string 70 ?-) "\n\n"))
+ (article-begin . ,(concat "\n\n" (make-string 30 ?-) "\n\n"))
+ (prepare-body . nndoc-prepare-digest-body)
+ (body-end-function . nndoc-digest-body-end)
+ (file-end . "^End of .* Digest"))
+ (guess
+ (guess . nndoc-guess-type))
+ (digest
+ (guess . nndoc-guess-digest-type))
+ ))
+
\f
-(defconst nndoc-version "nndoc 0.1"
+(defvar nndoc-file-begin nil)
+(defvar nndoc-first-article nil)
+(defvar nndoc-article-end nil)
+(defvar nndoc-article-begin nil)
+(defvar nndoc-head-begin nil)
+(defvar nndoc-head-end nil)
+(defvar nndoc-file-end nil)
+(defvar nndoc-body-begin nil)
+(defvar nndoc-body-end-function nil)
+(defvar nndoc-body-end nil)
+(defvar nndoc-dissection-alist nil)
+(defvar nndoc-prepare-body nil)
+
+(defvar nndoc-current-server nil)
+(defvar nndoc-server-alist nil)
+(defvar nndoc-server-variables
+ (list
+ (list 'nndoc-article-type nndoc-article-type)
+ '(nndoc-article-begin nil)
+ '(nndoc-article-end nil)
+ '(nndoc-head-begin nil)
+ '(nndoc-head-end nil)
+ '(nndoc-first-article nil)
+ '(nndoc-current-buffer nil)
+ '(nndoc-group-alist nil)
+ '(nndoc-end-of-file nil)
+ '(nndoc-body-begin nil)
+ '(nndoc-address nil)))
+
+(defconst nndoc-version "nndoc 1.0"
"nndoc version.")
(defvar nndoc-current-buffer nil
"Current nndoc news buffer.")
+(defvar nndoc-address nil)
+
+\f
+
(defvar nndoc-status-string "")
(defvar nndoc-group-alist nil)
;;; Interface functions
-(defun nndoc-retrieve-headers (sequence &optional newsgroup server)
- "Retrieve the headers for the articles in SEQUENCE.
-Newsgroup must be selected before calling this function."
- (save-excursion
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (let ((file nil)
- (number (length sequence))
- (count 0)
- beg article art-string start stop lines)
- (nndoc-possibly-change-buffer newsgroup server)
- (while sequence
- (setq article (car sequence))
- (set-buffer nndoc-current-buffer)
- (if (nndoc-search-for-article article)
- (progn
- (setq start
- (save-excursion
- (or
- (re-search-backward
- (concat "^" rmail-unix-mail-delimiter) nil t)
- (point-min))))
- (search-forward "\n\n" nil t)
- (setq lines (count-lines
- (point)
- (or
- (save-excursion
- (re-search-forward
- (concat "^" rmail-unix-mail-delimiter) nil t))
- (point-max))))
- (setq stop (1- (point)))
- (set-buffer nntp-server-buffer)
- (insert (format "221 %d Article retrieved.\n" article))
- (setq beg (point))
- (insert-buffer-substring nndoc-current-buffer start stop)
- (goto-char (point-max))
- (insert (format "Lines: %d\n" lines))
- (insert ".\n")))
- (setq sequence (cdr sequence)))
-
- ;; Fold continuation lines.
- (goto-char (point-min))
- (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
- (replace-match " " t t))
- 'headers)))
-
-(defun nndoc-open-server (host &optional service)
- "Open mbox backend."
- (setq nndoc-status-string "")
- (setq nndoc-group-alist nil)
- (nnheader-init-server-buffer))
+(defun nndoc-retrieve-headers (articles &optional newsgroup server fetch-old)
+ (when (nndoc-possibly-change-buffer newsgroup server)
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (let (article entry)
+ (if (stringp (car articles))
+ 'headers
+ (while articles
+ (setq entry (cdr (assq (setq article (pop articles))
+ nndoc-dissection-alist)))
+ (insert (format "221 %d Article retrieved.\n" article))
+ (insert-buffer-substring
+ nndoc-current-buffer (car entry) (nth 1 entry))
+ (goto-char (point-max))
+ (or (= (char-after (1- (point))) ?\n) (insert "\n"))
+ (insert (format "Lines: %d\n" (nth 4 entry)))
+ (insert ".\n"))
+
+ ;; Fold continuation lines.
+ (goto-char (point-min))
+ (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
+ (replace-match " " t t))
+ 'headers)))))
+
+(defun nndoc-open-server (server &optional defs)
+ (nnheader-init-server-buffer)
+ (if (equal server nndoc-current-server)
+ t
+ (if nndoc-current-server
+ (setq nndoc-server-alist
+ (cons (list nndoc-current-server
+ (nnheader-save-variables nndoc-server-variables))
+ nndoc-server-alist)))
+ (let ((state (assoc server nndoc-server-alist)))
+ (if state
+ (progn
+ (nnheader-restore-variables (nth 1 state))
+ (setq nndoc-server-alist (delq state nndoc-server-alist)))
+ (nnheader-set-init-variables nndoc-server-variables defs)))
+ (setq nndoc-current-server server)
+ t))
(defun nndoc-close-server (&optional server)
- "Close news server."
t)
(defun nndoc-server-opened (&optional server)
- "Return server process status."
- (and nntp-server-buffer
- (get-buffer nntp-server-buffer)))
+ (and (equal server nndoc-current-server)
+ nntp-server-buffer
+ (buffer-name nntp-server-buffer)))
(defun nndoc-status-message (&optional server)
- "Return server status response as string."
nndoc-status-string)
(defun nndoc-request-article (article &optional newsgroup server buffer)
- "Select ARTICLE by number."
(nndoc-possibly-change-buffer newsgroup server)
- (if (stringp article)
- nil
- (save-excursion
- (set-buffer nndoc-current-buffer)
- (if (nndoc-search-for-article article)
- (let (start stop)
- (re-search-backward (concat "^" rmail-unix-mail-delimiter) nil t)
- (forward-line 1)
- (setq start (point))
- (or (and (re-search-forward
- (concat "^" rmail-unix-mail-delimiter) nil t)
- (forward-line -1))
- (goto-char (point-max)))
- (setq stop (point))
- (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (insert-buffer-substring nndoc-current-buffer start stop)
- t))))))
+ (save-excursion
+ (let ((buffer (or buffer nntp-server-buffer))
+ (entry (cdr (assq article nndoc-dissection-alist)))
+ beg)
+ (set-buffer buffer)
+ (erase-buffer)
+ (if (stringp article)
+ nil
+ (insert-buffer-substring
+ nndoc-current-buffer (car entry) (nth 1 entry))
+ (insert "\n")
+ (setq beg (point))
+ (insert-buffer-substring
+ nndoc-current-buffer (nth 2 entry) (nth 3 entry))
+ (goto-char beg)
+ (when nndoc-prepare-body
+ (funcall nndoc-prepare-body))
+ t))))
(defun nndoc-request-group (group &optional server dont-check)
"Select news GROUP."
(save-excursion
(if (not (nndoc-possibly-change-buffer group server))
(progn
- (setq nndoc-status-string "No such file")
+ (setq nndoc-status-string "No such file or buffer")
nil)
(if dont-check
t
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
- (let ((number (nndoc-number-of-articles)))
+ (let ((number (length nndoc-dissection-alist)))
(if (zerop number)
(progn
(nndoc-close-group group)
nil)
- (insert (format "211 %d %d %d %s\n"
- number 1 number group))
+ (insert (format "211 %d %d %d %s\n" number 1 number group))
t)))))))
(defun nndoc-close-group (group &optional server)
(nndoc-possibly-change-buffer group server)
- (kill-buffer nndoc-current-buffer)
+ (and nndoc-current-buffer
+ (buffer-name nndoc-current-buffer)
+ (kill-buffer nndoc-current-buffer))
(setq nndoc-group-alist (delq (assoc group nndoc-group-alist)
nndoc-group-alist))
(setq nndoc-current-buffer nil)
+ (setq nndoc-current-server nil)
+ (setq nndoc-dissection-alist nil)
t)
(defun nndoc-request-list (&optional server)
(defun nndoc-request-list-newsgroups (&optional server)
nil)
-(defun nndoc-request-post (&optional server)
- (mail-send-and-exit nil))
-
-(fset 'nndoc-request-post-buffer 'nnmail-request-post-buffer)
+(defalias 'nndoc-request-post 'nnmail-request-post)
\f
;;; Internal functions.
-(defun nndoc-possibly-change-buffer (group file)
+(defun nndoc-possibly-change-buffer (group source)
(let (buf)
- (or (and nndoc-current-buffer
- (eq nndoc-current-buffer
- (setq buf (cdr (assoc group nndoc-group-alist)))))
- (if buf
- (setq nndoc-current-buffer buf)
- (if (or (not (file-exists-p file))
- (file-directory-p file))
- ()
- (setq nndoc-group-alist
- (cons (cons group (setq nndoc-current-buffer
- (get-buffer-create
- (concat " *nndoc " group "*"))))
- nndoc-group-alist))
- (save-excursion
- (set-buffer nndoc-current-buffer)
- (buffer-disable-undo (current-buffer))
- (erase-buffer)
- (insert-file-contents file)
- t))))))
-
-(defun nndoc-number-of-articles ()
- (save-excursion
- (set-buffer nndoc-current-buffer)
- (goto-char (point-min))
- (let ((num 0)
- (delim (concat "^" rmail-unix-mail-delimiter)))
- (while (re-search-forward delim nil t)
- (setq num (1+ num)))
- num)))
-
-(defun nndoc-search-for-article (article)
- (let ((obuf (current-buffer)))
- (set-buffer nndoc-current-buffer)
+ (cond
+ ;; The current buffer is this group's buffer.
+ ((and nndoc-current-buffer
+ (eq nndoc-current-buffer
+ (setq buf (cdr (assoc group nndoc-group-alist))))))
+ ;; We change buffers by taking an old from the group alist.
+ ;; `source' is either a string (a file name) or a buffer object.
+ (buf
+ (setq nndoc-current-buffer buf))
+ ;; It's a totally new group.
+ ((or (and (bufferp nndoc-address)
+ (buffer-name nndoc-address))
+ (and (stringp nndoc-address)
+ (file-exists-p nndoc-address)
+ (not (file-directory-p nndoc-address))))
+ (setq nndoc-group-alist
+ (cons (cons group (setq nndoc-current-buffer
+ (get-buffer-create
+ (concat " *nndoc " group "*"))))
+ nndoc-group-alist))
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (buffer-disable-undo (current-buffer))
+ (erase-buffer)
+ (if (stringp nndoc-address)
+ (insert-file-contents nndoc-address)
+ (insert-buffer-substring nndoc-address)))))
+ (when nndoc-current-buffer
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (nndoc-set-delims)
+ (nndoc-dissect-buffer))
+ t)))
+
+;; MIME (RFC 1341) digest hack by Ulrik Dickow <dickow@nbi.dk>.
+(defun nndoc-guess-digest-type ()
+ (let ((case-fold-search t) ; We match a bit too much, keep it simple.
+ boundary-id b-delimiter entry)
(goto-char (point-min))
- (let ((delim (concat "^" rmail-unix-mail-delimiter)))
- (while (and (re-search-forward delim nil t)
- (not (zerop (setq article (1- article))))))
- (set-buffer obuf)
- (if (zerop article)
- (progn
- (forward-line 1)
- t)
- nil))))
+ (cond
+ ;; MIME digest.
+ ((and
+ (re-search-forward
+ (concat "\n\n\\|^Content-Type: *multipart/digest;[ \t\n]*[ \t]"
+ "boundary=\"\\([^\"\n]*[^\" \t\n]\\)\"")
+ nil t)
+ (match-beginning 1))
+ (setq boundary-id (match-string 1)
+ b-delimiter (concat "\n--" boundary-id "[\n \t]+"))
+ (setq entry (assq 'mime-digest nndoc-type-alist))
+ (setcdr entry
+ (list
+ (cons 'article-begin b-delimiter)
+ (cons 'body-end
+ (concat "\n--" boundary-id "\\(--\\)?[\n \t]+"))
+ (cons 'file-end (concat "\n--" boundary-id "--[ \t]*$"))))
+ 'mime-digest)
+ ((and (re-search-forward (concat "^" (make-string 70 ?-) "\n\n") nil t)
+ (re-search-forward
+ (concat "\n\n" (make-string 30 ?-) "\n\n") nil t))
+ 'standard-digest)
+ ;; Stupid digest.
+ (t
+ 'slack-digest))))
+
+(defun nndoc-guess-type ()
+ "Guess what document type is in the current buffer."
+ (goto-char (point-min))
+ (cond
+ ((looking-at rmail-unix-mail-delimiter)
+ 'mbox)
+ ((looking-at "\^A\^A\^A\^A$")
+ 'mmdf)
+ ((looking-at "^Path:.*\n")
+ 'rnews)
+ ((save-excursion
+ (and (re-search-forward "^-+ Start of forwarded message -+\n+" nil t)
+ (not (re-search-forward "^Subject:.*digest" nil t))))
+ 'forward)
+ ((re-search-forward "\^_\^L *\n" nil t)
+ 'babyl)
+ ((re-search-forward "^Path: .*!" nil t)
+ 'news)
+ (t
+ 'digest)))
+
+(defun nndoc-set-delims ()
+ (let ((vars '(nndoc-file-begin
+ nndoc-first-article
+ nndoc-article-end nndoc-head-begin nndoc-head-end
+ nndoc-file-end nndoc-article-begin
+ nndoc-body-begin nndoc-body-end-function nndoc-body-end
+ nndoc-prepare-body)))
+ (while vars
+ (set (pop vars) nil)))
+ (let* (defs guess)
+ ;; Guess away until we find the real file type.
+ (while (setq defs (cdr (assq nndoc-article-type nndoc-type-alist))
+ guess (assq 'guess defs))
+ (setq nndoc-article-type (funcall (cdr guess))))
+ (while defs
+ (set (intern (format "nndoc-%s" (car (car defs))))
+ (cdr (pop defs))))))
+
+(defun nndoc-search (regexp)
+ (prog1
+ (re-search-forward regexp nil t)
+ (beginning-of-line)))
+
+(defun nndoc-dissect-buffer ()
+ (let ((i 0)
+ (first t)
+ head-begin head-end body-begin body-end)
+ (setq nndoc-dissection-alist nil)
+ (save-excursion
+ (set-buffer nndoc-current-buffer)
+ (goto-char (point-min))
+ ;; Find the beginning of the file.
+ (when nndoc-file-begin
+ (nndoc-search nndoc-file-begin))
+ ;; Go through the file.
+ (while (if (and first nndoc-first-article)
+ (nndoc-search nndoc-first-article)
+ (nndoc-search nndoc-article-begin))
+ (setq first nil)
+ (when nndoc-head-begin
+ (nndoc-search nndoc-head-begin))
+ (setq head-begin (point))
+ (nndoc-search (or nndoc-head-end "^$"))
+ (setq head-end (point))
+ (nndoc-search (or nndoc-body-begin "^\n"))
+ (setq body-begin (point))
+ (or (and nndoc-body-end-function
+ (funcall nndoc-body-end-function))
+ (and nndoc-body-end
+ (nndoc-search nndoc-body-end))
+ (nndoc-search nndoc-article-begin)
+ (progn
+ (goto-char (point-max))
+ (when nndoc-file-end
+ (and (re-search-backward nndoc-file-end nil t)
+ (beginning-of-line)))))
+ (setq body-end (point))
+ (push (list (incf i) head-begin head-end body-begin body-end
+ (count-lines body-begin body-end))
+ nndoc-dissection-alist)
+ ))))
+
+(defun nndoc-prepare-digest-body ()
+ "Unquote quoted non-separators in digests."
+ (while (re-search-forward "^- -"nil t)
+ (replace-match "-" t t)))
+
+(defun nndoc-digest-body-end ()
+ (and (re-search-forward nndoc-article-begin nil t)
+ (goto-char (match-beginning 0))))
+
+(defun nndoc-mbox-body-end ()
+ (let ((beg (point))
+ len end)
+ (when
+ (save-excursion
+ (and (re-search-backward nndoc-article-begin nil t)
+ (setq end (point))
+ (search-forward "\n\n" beg t)
+ (re-search-backward "^Content-Length: \\([0-9]+\\) *$" end t)
+ (setq len (string-to-int (match-string 1)))
+ (search-forward "\n\n" beg t)
+ (or (= (setq len (+ (point) len)) (point-max))
+ (and (< len (point-max))
+ (goto-char len)
+ (looking-at nndoc-article-begin)))))
+ (goto-char len))))
+
+(defun nndoc-rnews-body-end ()
+ (save-excursion
+ (and (re-search-backward nndoc-article-begin nil t)
+ (goto-char (+ (point) (string-to-int (match-string 1)))))))
(provide 'nndoc)
projects / gnus / blobdiff