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d501f516 ER |
1 | ;;; undigest.el --- digest-cracking support for the RMAIL mail reader |
2 | ||
f2e3589a | 3 | ;; Copyright (C) 1985, 1986, 1994, 1996, 2001, 2002, 2003, 2004, |
2f043267 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
58142744 | 5 | |
e5167999 | 6 | ;; Maintainer: FSF |
d7b4d18f | 7 | ;; Keywords: mail |
e5167999 | 8 | |
0d20f9a0 JB |
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 | |
ceaeecb0 | 13 | ;; the Free Software Foundation; either version 3, or (at your option) |
0d20f9a0 JB |
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 | |
b578f267 | 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
3a35cf56 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
0d20f9a0 | 25 | |
e5167999 ER |
26 | ;;; Commentary: |
27 | ||
3af9d2cf | 28 | ;; See Internet RFC 934 and RFC 1153 |
96f428d1 | 29 | ;; Also limited support for MIME digest encapsulation |
e5167999 ER |
30 | |
31 | ;;; Code: | |
0d20f9a0 | 32 | |
4fe9b563 KH |
33 | (require 'rmail) |
34 | ||
47687ab8 FP |
35 | (defconst rmail-mail-separator |
36 | "\^_\^L\n0, unseen,,\n*** EOOH ***\n" | |
37 | "String for separating messages in an rmail file.") | |
38 | ||
a34804da FP |
39 | (defcustom rmail-forward-separator-regex |
40 | "^----.*\\([Ff]orwarded\\|[Oo]riginal\\).*[Mm]essage" | |
41 | "*Regexp to match the string that introduces forwarded messages. | |
42 | This is not a header, but a string contained in the body of the message. | |
1acb4c26 | 43 | You may need to customize it for local needs." |
a34804da FP |
44 | :type 'regexp |
45 | :group 'rmail-headers) | |
46 | ||
47687ab8 | 47 | \f |
3af9d2cf FP |
48 | (defconst rmail-digest-methods |
49 | '(rmail-digest-parse-mime | |
50 | rmail-digest-parse-rfc1153strict | |
51 | rmail-digest-parse-rfc1153sloppy | |
52 | rmail-digest-parse-rfc934) | |
47687ab8 | 53 | "List of digest parsing functions, first tried first. |
3af9d2cf | 54 | |
47687ab8 FP |
55 | These functions operate on the current narrowing, and take no argument. |
56 | A function returns nil if it cannot parse the digest. If it can, it | |
3af9d2cf FP |
57 | returns a list of cons pairs containing the start and end positions of |
58 | each undigestified message as markers.") | |
59 | ||
3af9d2cf FP |
60 | (defun rmail-digest-parse-mime () |
61 | (goto-char (point-min)) | |
62 | (when (let ((head-end (progn (search-forward "\n\n" nil t) (point)))) | |
63 | (goto-char (point-min)) | |
64 | (and head-end | |
65 | (re-search-forward | |
66 | (concat | |
67 | "^Content-type: multipart/digest;" | |
68 | "\\s-* boundary=\"?\\([^\";\n]+\\)[\";\n]") head-end t) | |
69 | (search-forward (match-string 1) nil t))) | |
70 | ;; Ok, prolog separator found | |
71 | (let ((start (make-marker)) | |
72 | (end (make-marker)) | |
73 | (separator (concat "\n--" (match-string 0) "\n\n")) | |
74 | result) | |
75 | (while (search-forward separator nil t) | |
76 | (move-marker start (match-beginning 0)) | |
77 | (move-marker end (match-end 0)) | |
78 | (add-to-list 'result (cons (copy-marker start) (copy-marker end t)))) | |
79 | ;; Return the list of marker pairs | |
80 | (nreverse result)))) | |
81 | ||
82 | (defun rmail-digest-parse-rfc1153strict () | |
83 | "Parse following strictly the method defined in RFC 1153. | |
84 | See rmail-digest-methods." | |
85 | (rmail-digest-rfc1153 | |
86 | "^-\\{70\\}\n\n" | |
87 | "^\n-\\{30\\}\n\n" | |
88 | "^\n-\\{30\\}\n\nEnd of .* Digest.*\n\\*\\{15,\\}\n+\'")) | |
89 | ||
90 | (defun rmail-digest-parse-rfc1153sloppy () | |
91 | "Parse using the method defined in RFC 1153, allowing for some sloppiness. | |
92 | See rmail-digest-methods." | |
93 | (rmail-digest-rfc1153 | |
94 | "^-\\{55,\\}\n\n" | |
95 | "^\n-\\{27,\\}\n\n" | |
980d5def GM |
96 | ;; GNU Mailman knowingly (see comment at line 353 of ToDigest.py in |
97 | ;; Mailman source) produces non-conformant rfc 1153 digests, in that | |
98 | ;; the trailer contains a "digest footer" like this: | |
99 | ;; _______________________________________________ | |
100 | ;; <one or more lines of list blurb> | |
101 | ;; | |
102 | ;; End of Foo Digest... | |
103 | ;; ************************************** | |
104 | "^\nEnd of")) | |
3af9d2cf FP |
105 | |
106 | (defun rmail-digest-rfc1153 (prolog-sep message-sep trailer-sep) | |
107 | (goto-char (point-min)) | |
108 | (when (re-search-forward prolog-sep nil t) | |
109 | ;; Ok, prolog separator found | |
110 | (let ((start (make-marker)) | |
111 | (end (make-marker)) | |
112 | separator result) | |
113 | (move-marker start (match-beginning 0)) | |
114 | (move-marker end (match-end 0)) | |
980d5def | 115 | (setq result (list (cons (copy-marker start) (copy-marker end t)))) |
3af9d2cf FP |
116 | (when (re-search-forward message-sep nil t) |
117 | ;; Ok, at least one message separator found | |
118 | (setq separator (match-string 0)) | |
119 | (when (re-search-forward trailer-sep nil t) | |
120 | ;; Wonderful, we found a trailer, too. Now, go on splitting | |
121 | ;; the digest into separate rmail messages | |
122 | (goto-char (cdar result)) | |
123 | (while (search-forward separator nil t) | |
124 | (move-marker start (match-beginning 0)) | |
125 | (move-marker end (match-end 0)) | |
126 | (add-to-list 'result | |
127 | (cons (copy-marker start) (copy-marker end t)))) | |
128 | ;; Undo masking of separators inside digestified messages | |
129 | (goto-char (point-min)) | |
130 | (while (search-forward | |
131 | (replace-regexp-in-string "\n-" "\n " separator) nil t) | |
132 | (replace-match separator)) | |
133 | ;; Return the list of marker pairs | |
134 | (nreverse result)))))) | |
135 | ||
136 | (defun rmail-digest-parse-rfc934 () | |
137 | (goto-char (point-min)) | |
138 | (when (re-search-forward "^\n?-[^ ].*\n\n?" nil t) | |
139 | ;; Message separator found | |
140 | (let ((start (make-marker)) | |
141 | (end (make-marker)) | |
142 | (separator (match-string 0)) | |
143 | result) | |
144 | (goto-char (point-min)) | |
145 | (while (search-forward separator nil t) | |
146 | (move-marker start (match-beginning 0)) | |
147 | (move-marker end (match-end 0)) | |
148 | (add-to-list 'result (cons (copy-marker start) (copy-marker end t)))) | |
149 | ;; Undo masking of separators inside digestified messages | |
150 | (goto-char (point-min)) | |
151 | (while (search-forward "\n- -" nil t) | |
152 | (replace-match "\n-")) | |
153 | ;; Return the list of marker pairs | |
154 | (nreverse result)))) | |
155 | ||
2b54af74 DN |
156 | (declare-function rmail-update-summary "rmailsum" (&rest ignore)) |
157 | ||
372a91d7 | 158 | ;;;###autoload |
0d20f9a0 JB |
159 | (defun undigestify-rmail-message () |
160 | "Break up a digest message into its constituent messages. | |
161 | Leaves original message, deleted, before the undigestified messages." | |
162 | (interactive) | |
add0c454 RS |
163 | (with-current-buffer rmail-buffer |
164 | (widen) | |
add0c454 RS |
165 | (let ((error t) |
166 | (buffer-read-only nil)) | |
3af9d2cf FP |
167 | (goto-char (rmail-msgend rmail-current-message)) |
168 | (let ((msg-copy (buffer-substring (rmail-msgbeg rmail-current-message) | |
169 | (rmail-msgend rmail-current-message)))) | |
170 | (narrow-to-region (point) (point)) | |
171 | (insert msg-copy)) | |
172 | (narrow-to-region (point-min) (1- (point-max))) | |
add0c454 RS |
173 | (unwind-protect |
174 | (progn | |
175 | (save-restriction | |
176 | (goto-char (point-min)) | |
177 | (delete-region (point-min) | |
3af9d2cf | 178 | (progn (search-forward "\n*** EOOH ***\n" nil t) |
add0c454 | 179 | (point))) |
47687ab8 | 180 | (insert "\n" rmail-mail-separator) |
add0c454 RS |
181 | (narrow-to-region (point) |
182 | (point-max)) | |
3af9d2cf FP |
183 | (let ((fill-prefix "") |
184 | (case-fold-search t) | |
185 | digest-name type start end separator fun-list sep-list) | |
186 | (setq digest-name (mail-strip-quoted-names | |
187 | (save-restriction | |
188 | (search-forward "\n\n" nil 'move) | |
189 | (setq start (point)) | |
190 | (narrow-to-region (point-min) start) | |
191 | (or (mail-fetch-field "Reply-To") | |
192 | (mail-fetch-field "To") | |
193 | (mail-fetch-field "Apparently-To") | |
194 | (mail-fetch-field "From"))))) | |
195 | (unless digest-name | |
196 | (error "Message is not a digest--bad header")) | |
197 | ||
198 | (setq fun-list rmail-digest-methods) | |
199 | (while (and fun-list | |
200 | (null (setq sep-list (funcall (car fun-list))))) | |
201 | (setq fun-list (cdr fun-list))) | |
202 | (unless sep-list | |
203 | (error "Message is not a digest--no messages found")) | |
204 | ||
205 | ;;; Split the digest into separate rmail messages | |
206 | (while sep-list | |
207 | (let ((start (caar sep-list)) | |
208 | (end (cdar sep-list))) | |
209 | (delete-region start end) | |
210 | (goto-char start) | |
47687ab8 | 211 | (insert rmail-mail-separator) |
3af9d2cf FP |
212 | (search-forward "\n\n" (caar (cdr sep-list)) 'move) |
213 | (save-restriction | |
214 | (narrow-to-region end (point)) | |
215 | (unless (mail-fetch-field "To") | |
216 | (goto-char start) | |
217 | (insert "To: " digest-name "\n"))) | |
218 | (set-marker start nil) | |
219 | (set-marker end nil)) | |
220 | (setq sep-list (cdr sep-list))))) | |
221 | ||
add0c454 RS |
222 | (setq error nil) |
223 | (message "Message successfully undigestified") | |
224 | (let ((n rmail-current-message)) | |
225 | (rmail-forget-messages) | |
226 | (rmail-show-message n) | |
227 | (rmail-delete-forward) | |
228 | (if (rmail-summary-exists) | |
229 | (rmail-select-summary | |
230 | (rmail-update-summary))))) | |
231 | (cond (error | |
232 | (narrow-to-region (point-min) (1+ (point-max))) | |
233 | (delete-region (point-min) (point-max)) | |
234 | (rmail-show-message rmail-current-message))))))) | |
47687ab8 | 235 | \f |
372a91d7 | 236 | ;;;###autoload |
9f606031 KH |
237 | (defun unforward-rmail-message () |
238 | "Extract a forwarded message from the containing message. | |
239 | This puts the forwarded message into a separate rmail message | |
240 | following the containing message." | |
241 | (interactive) | |
add0c454 | 242 | ;; If we are in a summary buffer, switch to the Rmail buffer. |
47687ab8 FP |
243 | (unwind-protect |
244 | (with-current-buffer rmail-buffer | |
47687ab8 | 245 | (goto-char (point-min)) |
89dac01f FP |
246 | (narrow-to-region (point) |
247 | (save-excursion (search-forward "\n\n") (point))) | |
47687ab8 | 248 | (let ((buffer-read-only nil) |
89dac01f FP |
249 | (old-fwd-from (mail-fetch-field "Forwarded-From" nil nil t)) |
250 | (old-fwd-date (mail-fetch-field "Forwarded-Date" nil nil t)) | |
251 | (fwd-from (mail-fetch-field "From")) | |
252 | (fwd-date (mail-fetch-field "Date")) | |
e49ba701 | 253 | beg end prefix forward-msg) |
89dac01f FP |
254 | (narrow-to-region (rmail-msgbeg rmail-current-message) |
255 | (rmail-msgend rmail-current-message)) | |
256 | (goto-char (point-min)) | |
a34804da | 257 | (cond ((re-search-forward rmail-forward-separator-regex nil t) |
47687ab8 | 258 | (forward-line 1) |
59cb5b9b | 259 | (skip-chars-forward "\n") |
47687ab8 FP |
260 | (setq beg (point)) |
261 | (setq end (if (re-search-forward "^----.*[^- \t\n]" nil t) | |
262 | (match-beginning 0) (point-max))) | |
263 | (setq forward-msg | |
264 | (replace-regexp-in-string | |
265 | "^- -" "-" (buffer-substring beg end)))) | |
85e94996 | 266 | ((and (re-search-forward "^\\(> ?\\)[a-zA-Z-]+: .*\n" nil t) |
47687ab8 | 267 | (setq beg (match-beginning 0)) |
baad7c13 | 268 | (setq prefix (match-string-no-properties 1)) |
85e94996 | 269 | (goto-char beg) |
47687ab8 | 270 | (looking-at (concat "\\(" prefix ".+\n\\)*" |
baad7c13 | 271 | prefix "Date: .")) |
85e94996 FP |
272 | (looking-at (concat "\\(" prefix ".+\n\\)*" |
273 | prefix "From: .+\n" | |
274 | "\\(" prefix ".+\n\\)*" | |
47687ab8 FP |
275 | "\\(> ?\\)?\n" prefix))) |
276 | (re-search-forward "^[^>\n]" nil 'move) | |
277 | (backward-char) | |
278 | (skip-chars-backward " \t\n") | |
279 | (forward-line 1) | |
280 | (setq end (point)) | |
281 | (setq forward-msg | |
282 | (replace-regexp-in-string | |
283 | (if (string= prefix ">") "^>" "> ?") | |
284 | "" (buffer-substring beg end)))) | |
285 | (t | |
286 | (error "No forwarded message found"))) | |
287 | (widen) | |
288 | (goto-char (rmail-msgend rmail-current-message)) | |
289 | (narrow-to-region (point) (point)) | |
290 | (insert rmail-mail-separator) | |
291 | (narrow-to-region (point) (point)) | |
89dac01f FP |
292 | (while old-fwd-from |
293 | (insert "Forwarded-From: " (car old-fwd-from) "\n") | |
294 | (insert "Forwarded-Date: " (car old-fwd-date) "\n") | |
295 | (setq old-fwd-from (cdr old-fwd-from)) | |
296 | (setq old-fwd-date (cdr old-fwd-date))) | |
297 | (insert "Forwarded-From: " fwd-from "\n") | |
298 | (insert "Forwarded-Date: " fwd-date "\n") | |
47687ab8 FP |
299 | (insert forward-msg) |
300 | (save-restriction | |
301 | (goto-char (point-min)) | |
302 | (re-search-forward "\n$" nil 'move) | |
303 | (narrow-to-region (point-min) (point)) | |
304 | (goto-char (point-min)) | |
305 | (while (not (eobp)) | |
306 | (unless (looking-at "^[a-zA-Z-]+: ") | |
307 | (insert "\t")) | |
308 | (forward-line))) | |
309 | (goto-char (point-min)))) | |
e49ba701 KS |
310 | (let ((n rmail-current-message)) |
311 | (rmail-forget-messages) | |
312 | (rmail-show-message n)) | |
47687ab8 FP |
313 | (if (rmail-summary-exists) |
314 | (rmail-select-summary | |
315 | (rmail-update-summary))))) | |
316 | ||
9f606031 | 317 | |
896546cd RS |
318 | (provide 'undigest) |
319 | ||
cbee283d | 320 | ;; arch-tag: 3a28b9fb-c1f5-43ef-9278-285f3e4b874d |
d501f516 | 321 | ;;; undigest.el ends here |