1 ;;; mime-parse.el --- MIME message parser
3 ;; Copyright (C) 1994,1995,1996,1997,1998,1999 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Keywords: parse, MIME, multimedia, mail, news
8 ;; This file is part of SEMI (Spadework for Emacs MIME Interfaces).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version.
15 ;; This program is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
30 (autoload 'mime-entity-body-buffer "mime")
31 (autoload 'mime-entity-body-start-point "mime")
32 (autoload 'mime-entity-body-end-point "mime")
35 ;;; @ lexical analyzer
38 (defcustom mime-lexical-analyzer
39 '(std11-analyze-quoted-string
40 std11-analyze-domain-literal
45 "*List of functions to return result of lexical analyze.
46 Each function must have two arguments: STRING and START.
47 STRING is the target string to be analyzed.
48 START is start position of STRING to analyze.
50 Previous function is preferred to next function. If a function
51 returns nil, next function is used. Otherwise the return value will
54 :type '(repeat function))
56 (defun mime-analyze-tspecial (string start)
57 (if (and (> (length string) start)
58 (memq (aref string start) mime-tspecial-char-list))
59 (cons (cons 'tpecials (substring string start (1+ start)))
63 (defun mime-analyze-token (string start)
64 (if (and (string-match mime-token-regexp string start)
65 (= (match-beginning 0) start))
66 (let ((end (match-end 0)))
67 (cons (cons 'mime-token (substring string start end))
68 ;;(substring string end)
76 (defconst mime/content-parameter-value-regexp
78 std11-quoted-string-regexp
81 (defconst mime::parameter-regexp
82 (concat "^[ \t]*\;[ \t]*\\(" mime-token-regexp "\\)"
83 "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
85 (defun mime-parse-parameter (str)
86 (if (string-match mime::parameter-regexp str)
87 (let ((e (match-end 2)))
89 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
90 (std11-strip-quoted-string
91 (substring str (match-beginning 2) e))
101 (defun mime-parse-Content-Type (string)
102 "Parse STRING as field-body of Content-Type field.
104 (PRIMARY-TYPE SUBTYPE (NAME1 . VALUE1)(NAME2 . VALUE2) ...)
105 or nil. PRIMARY-TYPE and SUBTYPE are symbol and NAME_n and VALUE_n
107 (setq string (std11-unfold-string string))
108 (if (string-match `,(concat "^\\(" mime-token-regexp
109 "\\)/\\(" mime-token-regexp "\\)") string)
110 (let* ((type (downcase
111 (substring string (match-beginning 1) (match-end 1))))
113 (substring string (match-beginning 2) (match-end 2))))
115 (setq string (substring string (match-end 0)))
116 (while (setq ret (mime-parse-parameter string))
117 (setq dest (cons (car ret) dest)
120 (make-mime-content-type (intern type)(intern subtype)
125 (defun mime-read-Content-Type ()
126 "Read field-body of Content-Type field from current-buffer,
127 and return parsed it. Format of return value is as same as
128 `mime-parse-Content-Type'."
129 (let ((str (std11-field-body "Content-Type")))
131 (mime-parse-Content-Type str)
135 ;;; @ Content-Disposition
139 (defconst mime-disposition-type-regexp mime-token-regexp)
143 (defun mime-parse-Content-Disposition (string)
144 "Parse STRING as field-body of Content-Disposition field."
145 (setq string (std11-unfold-string string))
146 (if (string-match (eval-when-compile
147 (concat "^" mime-disposition-type-regexp)) string)
148 (let* ((e (match-end 0))
149 (type (downcase (substring string 0 e)))
151 (setq string (substring string e))
152 (while (setq ret (mime-parse-parameter string))
153 (setq dest (cons (car ret) dest)
156 (cons (cons 'type (intern type))
161 (defun mime-read-Content-Disposition ()
162 "Read field-body of Content-Disposition field from current-buffer,
163 and return parsed it."
164 (let ((str (std11-field-body "Content-Disposition")))
166 (mime-parse-Content-Disposition str)
170 ;;; @ Content-Transfer-Encoding
174 (defun mime-parse-Content-Transfer-Encoding (string)
175 "Parse STRING as field-body of Content-Transfer-Encoding field."
176 (let ((tokens (std11-lexical-analyze string mime-lexical-analyzer))
179 (setq token (car tokens))
180 (std11-ignored-token-p token))
181 (setq tokens (cdr tokens)))
183 (if (eq (car token) 'mime-token)
184 (downcase (cdr token))
188 (defun mime-read-Content-Transfer-Encoding (&optional default-encoding)
189 "Read field-body of Content-Transfer-Encoding field from
190 current-buffer, and return it.
191 If is is not found, return DEFAULT-ENCODING."
192 (let ((str (std11-field-body "Content-Transfer-Encoding")))
194 (mime-parse-Content-Transfer-Encoding str)
198 ;;; @ Content-Id / Message-Id
202 (defun mime-parse-msg-id (tokens)
203 "Parse TOKENS as msg-id of Content-Id or Message-Id field."
204 (car (std11-parse-msg-id tokens)))
207 (defun mime-uri-parse-cid (string)
208 "Parse STRING as cid URI."
210 (mime-parse-msg-id (cons '(specials . "<")
212 (cdr (cdr (std11-lexical-analyze string)))
213 '((specials . ">")))))))
219 ;; (defun mime-parse-multipart (entity)
220 ;; (with-current-buffer (mime-entity-body-buffer entity)
221 ;; (let* ((representation-type
222 ;; (mime-entity-representation-type-internal entity))
223 ;; (content-type (mime-entity-content-type-internal entity))
226 ;; (mime-content-type-parameter content-type "boundary")))
227 ;; (delimiter (concat "\n" (regexp-quote dash-boundary)))
228 ;; (close-delimiter (concat delimiter "--[ \t]*$"))
229 ;; (rsep (concat delimiter "[ \t]*\n"))
231 ;; (if (eq (mime-content-type-subtype content-type) 'digest)
232 ;; (make-mime-content-type 'message 'rfc822)
233 ;; (make-mime-content-type 'text 'plain)
235 ;; (body-start (mime-entity-body-start-point entity))
236 ;; (body-end (mime-entity-body-end-point entity)))
238 ;; (goto-char body-end)
239 ;; (narrow-to-region body-start
240 ;; (if (re-search-backward close-delimiter nil t)
241 ;; (match-beginning 0)
243 ;; (goto-char body-start)
244 ;; (if (re-search-forward
245 ;; (concat "^" (regexp-quote dash-boundary) "[ \t]*\n")
247 ;; (let ((cb (match-end 0))
248 ;; ce ncb ret children
249 ;; (node-id (mime-entity-node-id-internal entity))
251 ;; (while (re-search-forward rsep nil t)
252 ;; (setq ce (match-beginning 0))
253 ;; (setq ncb (match-end 0))
255 ;; (narrow-to-region cb ce)
256 ;; (setq ret (mime-parse-message representation-type dc-ctl
257 ;; entity (cons i node-id)))
259 ;; (setq children (cons ret children))
260 ;; (goto-char (setq cb ncb))
263 ;; (setq ce (point-max))
265 ;; (narrow-to-region cb ce)
266 ;; (setq ret (mime-parse-message representation-type dc-ctl
267 ;; entity (cons i node-id)))
269 ;; (setq children (cons ret children))
270 ;; (mime-entity-set-children-internal entity (nreverse children))
272 ;; (mime-entity-set-content-type-internal
273 ;; entity (make-mime-content-type 'message 'x-broken))
277 ;; (defun mime-parse-encapsulated (entity)
278 ;; (mime-entity-set-children-internal
280 ;; (with-current-buffer (mime-entity-body-buffer entity)
282 ;; (narrow-to-region (mime-entity-body-start-point entity)
283 ;; (mime-entity-body-end-point entity))
284 ;; (list (mime-parse-message
285 ;; (mime-entity-representation-type-internal entity) nil
286 ;; entity (cons 0 (mime-entity-node-id-internal entity))))
289 ;; (defun mime-parse-external (entity)
290 ;; (require 'mmexternal)
291 ;; (mime-entity-set-children-internal
293 ;; (with-current-buffer (mime-entity-body-buffer entity)
295 ;; (narrow-to-region (mime-entity-body-start-point entity)
296 ;; (mime-entity-body-end-point entity))
297 ;; (list (mime-parse-message
298 ;; 'mime-external-entity nil
299 ;; entity (cons 0 (mime-entity-node-id-internal entity))))
300 ;; ;; [tomo] Should we unify with `mime-parse-encapsulated'?
303 (defun mime-parse-message (representation-type &optional default-ctl
305 (let ((header-start (point-min))
308 (body-end (point-max))
310 (goto-char header-start)
311 (if (re-search-forward "^$" nil t)
312 (setq header-end (match-end 0)
313 body-start (if (= header-end body-end)
316 (setq header-end (point-min)
317 body-start (point-min)))
319 (narrow-to-region header-start header-end)
320 (setq content-type (or (let ((str (std11-fetch-field "Content-Type")))
322 (mime-parse-Content-Type str)
326 (luna-make-entity representation-type
327 :location (current-buffer)
328 :content-type content-type
331 :buffer (current-buffer)
332 :header-start header-start
333 :header-end header-end
334 :body-start body-start
343 (defun mime-parse-buffer (&optional buffer representation-type)
344 "Parse BUFFER as a MIME message.
345 If buffer is omitted, it parses current-buffer."
347 (if buffer (set-buffer buffer))
348 (mime-parse-message (or representation-type
349 'mime-buffer-entity) nil)))
355 (provide 'mime-parse)
357 ;;; mime-parse.el ends here