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undigestify.el
From: |
Francesco Potorti` |
Subject: |
undigestify.el |
Date: |
Thu, 12 Dec 2002 19:29:21 +0100 |
I added rfc 934 support to undigestify.el.
In fact, in the current CVS source, undigestify.el claims to be rfc934
compliant, while in fact it implements a "tolerant" version of rfc1153.
I modified it to support both. The next step is to support two other
formats: "Chris Lewis minimal digest format" and another format whose
name I ignore that is used in the debian changes digest list. It uses
the string "^L #################" to separate
messages inside a digest. In summary:
undigestify.el claimed to support rfc934, but in fact it supported
rfc1153.
The appended file supports both rfc934 and rfc 1153.
In order to test it, I need people to send me copies of digest messages
in all possible formats.
So, please:
1) if any one knows, let me know the name of the digest format that uses
the "^L #################" string as a
separator.
2) SEND ME DIGESTED MESSAGES in all possible formats, to test and
improve the code.
===File ~/gnu/emacs-dev/lisp/mail/undigest.el===============
;;; undigest.el --- digest-cracking support for the RMAIL mail reader
;; Copyright (C) 1985, 1986, 1994, 1996, 2002
;; Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: mail
;; 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:
;; See Internet RFC 934 and RFC 1153
;;; Code:
(require 'rmail)
(defcustom rmail-digest-picky nil
"Whether \[undigestify-rmail-message] should strictly follow RFC 1153
or be more tolerant of deviations from it.
Does not apply to digests that follow RFC 934."
:type 'boolean
:group 'rmail)
(defconst rmail-digest-start-regex
(if rmail-digest-picky
"^-\\{70\\}\n\n" ;rfc 1153
"^-\\{55,\\}\n\n")
"A regular expression for finding the end of the preamble (RFC 1153).")
(defconst rmail-digest-separator-regex
(if rmail-digest-picky
"^\n-\\{30\\}\n\n" ;rfc 1153
"^\n-\\{27,\\}\n\n")
"A regular expression for finding the end of an enclosed message (RFC 1153).")
(defconst rmail-digest-end-regex
(if rmail-digest-picky
"^\n-\\{30\\}\n\nEnd of .* Digest.*\n\\*\\{15,\\}\n+\'" ;rfc 1153
"^\n-\\{27,\\}\n\nEnd of")
"A regular expression for finding the trailer (RFC 1153).")
(defconst rmail-digest-mail-separator
"\^_\^L\n0, unseen,,\n*** EOOH ***\n"
"String substituted to the digest separator to create separate messages.")
;;;###autoload
(defun undigestify-rmail-message ()
"Break up a digest message into its constituent messages.
Leaves original message, deleted, before the undigestified messages."
(interactive)
(with-current-buffer rmail-buffer
(widen)
(let ((error t)
(buffer-read-only nil))
(goto-char (rmail-msgend rmail-current-message))
(let ((msg-copy (buffer-substring (rmail-msgbeg rmail-current-message)
(rmail-msgend rmail-current-message))))
(narrow-to-region (point) (point))
(insert msg-copy))
(narrow-to-region (point-min) (1- (point-max)))
(unwind-protect
(progn
(save-restriction
(goto-char (point-min))
(delete-region (point-min)
(progn (search-forward "\n*** EOOH ***\n" nil t)
(point)))
(insert rmail-digest-mail-separator)
(narrow-to-region (point)
(point-max))
(let ((fill-prefix "")
(case-fold-search t)
digest-name type start end separator)
(setq digest-name (mail-strip-quoted-names
(save-restriction
(search-forward "\n\n" nil 'move)
(setq start (point))
(narrow-to-region (point-min) start)
(or (mail-fetch-field "Reply-To")
(mail-fetch-field "To")
(mail-fetch-field "Apparently-To")
(mail-fetch-field "From")))))
(unless digest-name
(error "Message is not a digest--bad header"))
(unless (or (re-search-forward rmail-digest-start-regex nil t)
(re-search-forward "^-.*\n\n" nil t))
(error "Message is not a digest--no preamble delimiter"))
;; Find the message separator string and the digest type
(setq start (point))
(save-match-data
(setq separator (concat "\n" (match-string 0)))
(if (search-forward separator nil t)
;; rfc 934 -style message: the preamble delimiter is
;; also the message separator
(setq type 'rfc934)
;; rfc 1153 -style message: the separator is different
;; from the preamble delimiter
(setq separator rmail-digest-separator-regex)
(unless (search-forward separator nil t)
(error "Message is not a digest--no message delimiter"))
(unless (search-forward rmail-digest-end-regex nil t)
(error "Message is not a digest--no trailer"))
(setq type 'rfc1153)))
;;; Split the digest into separate rmail messages
;; Add first rmail header
(goto-char start)
(replace-match rmail-digest-mail-separator)
;; Add subsequent rmail headers
(while (progn (setq start (point))
(search-forward separator nil t))
(setq end (match-beginning 0))
(replace-match rmail-digest-mail-separator)
(goto-char start)
(search-forward "\n\n" end 'move)
(save-restriction
(narrow-to-region start (point))
(unless (mail-fetch-field "To")
(goto-char start)
(insert "To: " digest-name "\n")))
;; Undo masking of separators inside digestified messages
(let ((fromstring (if (eq type 'rfc934)
"\n- -"
(replace-regexp-in-string
"\n-" "\n " separator)))
(tostring (if (eq type 'rfc934) "\n-" separator)))
(goto-char start)
(while (search-forward fromstring end t)
(replace-match tostring))
))))
(setq error nil)
(message "Message successfully undigestified")
(let ((n rmail-current-message))
(rmail-forget-messages)
(rmail-show-message n)
(rmail-delete-forward)
(if (rmail-summary-exists)
(rmail-select-summary
(rmail-update-summary)))))
(cond (error
(narrow-to-region (point-min) (1+ (point-max)))
(delete-region (point-min) (point-max))
(rmail-show-message rmail-current-message)))))))
;;;###autoload
(defun unforward-rmail-message ()
"Extract a forwarded message from the containing message.
This puts the forwarded message into a separate rmail message
following the containing message."
(interactive)
;; If we are in a summary buffer, switch to the Rmail buffer.
(with-current-buffer rmail-buffer
(narrow-to-region (rmail-msgbeg rmail-current-message)
(rmail-msgend rmail-current-message))
(goto-char (point-min))
(let (beg end (buffer-read-only nil) msg-string who-forwarded-it)
(setq who-forwarded-it (mail-fetch-field "From"))
(if (re-search-forward "^----" nil t)
nil
(error "No forwarded message"))
(forward-line 1)
(setq beg (point))
(if (re-search-forward "^----" nil t)
(setq end (match-beginning 0))
(error "No terminator for forwarded message"))
(widen)
(setq msg-string (buffer-substring beg end))
(goto-char (rmail-msgend rmail-current-message))
(narrow-to-region (point) (point))
(insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(narrow-to-region (point) (point))
(insert "Forwarded-by: " who-forwarded-it "\n")
(insert msg-string)
(goto-char (point-min))
(while (not (eobp))
(if (looking-at "- ")
(delete-region (point) (+ 2 (point))))
(forward-line 1))
(let ((n rmail-current-message))
(rmail-forget-messages)
(rmail-show-message n)
(if (rmail-summary-exists)
(rmail-select-summary
(rmail-update-summary)))))))
(provide 'undigest)
;;; undigest.el ends here
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