1 ;;; mime-parse.el --- MIME message parser
3 ;; Copyright (C) 1994,1995,1996,1997 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Version: $Id: mime-parse.el,v 0.4 1997-02-27 13:36:22 tmorioka Exp $
7 ;; Keywords: parse, MIME, multimedia, mail, news
9 ;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
11 ;; This program is free software; you can redistribute it and/or
12 ;; modify it under the terms of the GNU General Public License as
13 ;; published by the Free Software Foundation; either version 2, or (at
14 ;; your option) any later version.
16 ;; This program is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
31 (defmacro define-structure (name &rest slots)
32 (let ((pred (symbol-concat name '-p)))
36 (` (defun (, pred) (obj)
38 (eq (elt obj 0) '(, name))
41 (` (defun (, (symbol-concat name '/create)) (, slots)
42 (, (cons 'vector (cons (list 'quote name) slots)))
49 (` (defun (, (symbol-concat name '/ slot)) (obj)
58 (list (list 'quote name))
65 (defsubst regexp-* (regexp)
68 (defconst rfc822/quoted-pair-regexp "\\\\.")
69 (defconst rfc822/qtext-regexp
70 (concat "[^" (char-list-to-string std11-non-qtext-char-list) "]"))
71 (defconst rfc822/quoted-string-regexp
74 (regexp-or rfc822/qtext-regexp rfc822/quoted-pair-regexp)
78 (defconst mime/content-parameter-value-regexp
80 rfc822/quoted-string-regexp
83 (defconst mime::parameter-regexp
84 (concat "^[ \t]*\;[ \t]*\\(" mime/token-regexp "\\)"
85 "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
87 (defun mime-parse-parameter (str)
88 (if (string-match mime::parameter-regexp str)
89 (let ((e (match-end 2)))
91 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
92 (std11-strip-quoted-string
93 (substring str (match-beginning 2) e))
98 (defconst mime::ctype-regexp (concat "^" mime/content-type-subtype-regexp))
100 (defun mime-parse-Content-Type (string)
101 "Parse STRING as field-body of Content-Type field. [mime-parse.el]"
102 (setq string (std11-unfold-string string))
103 (if (string-match mime::ctype-regexp string)
104 (let* ((e (match-end 0))
105 (ctype (downcase (substring string 0 e)))
107 (setq string (substring string e))
108 (while (setq ret (mime-parse-parameter string))
109 (setq dest (cons (car ret) dest)
112 (cons ctype (nreverse dest))
115 (defconst mime::dtype-regexp (concat "^" mime/disposition-type-regexp))
117 (defun mime-parse-Content-Disposition (string)
118 "Parse STRING as field-body of Content-Disposition field. [mime-parse.el]"
119 (setq string (std11-unfold-string string))
120 (if (string-match mime::dtype-regexp string)
121 (let* ((e (match-end 0))
122 (ctype (downcase (substring string 0 e)))
124 (setq string (substring string e))
125 (while (setq ret (mime-parse-parameter string))
126 (setq dest (cons (car ret) dest)
129 (cons ctype (nreverse dest))
136 (defun mime/Content-Type ()
137 "Read field-body of Content-Type field from current-buffer,
138 and return parsed it. [mime-parse.el]"
139 (let ((str (std11-field-body "Content-Type")))
141 (mime-parse-Content-Type str)
144 (defun mime/Content-Transfer-Encoding (&optional default-encoding)
145 "Read field-body of Content-Transfer-Encoding field from
146 current-buffer, and return it.
147 If is is not found, return DEFAULT-ENCODING. [mime-parse.el]"
148 (let ((str (std11-field-body "Content-Transfer-Encoding")))
151 (if (string-match "[ \t\n\r]+$" str)
152 (setq str (substring str 0 (match-beginning 0)))
159 (defun mime/Content-Disposition ()
160 "Read field-body of Content-Disposition field from current-buffer,
161 and return parsed it. [mime-parse.el]"
162 (let ((str (std11-field-body "Content-Disposition")))
164 (mime-parse-Content-Disposition str)
171 (define-structure mime::content-info
172 rcnum point-min point-max type parameters encoding children)
175 (defun mime-parse-multipart (boundary ctype params encoding rcnum)
176 (goto-char (point-min))
177 (let* ((dash-boundary (concat "--" boundary))
178 (delimiter (concat "\n" (regexp-quote dash-boundary)))
179 (close-delimiter (concat delimiter "--[ \t]*$"))
182 (goto-char (point-max))
183 (if (re-search-backward close-delimiter nil t)
187 (rsep (concat delimiter "[ \t]*\n"))
189 (if (string-equal ctype "multipart/digest")
193 cb ce ct ret ncb children (i 0))
195 (narrow-to-region beg end)
197 (re-search-forward rsep nil t)
198 (setq cb (match-end 0))
199 (while (re-search-forward rsep nil t)
200 (setq ce (match-beginning 0))
201 (setq ncb (match-end 0))
203 (narrow-to-region cb ce)
204 (setq ret (mime-parse-message dc-ctl "7bit" (cons i rcnum)))
206 (setq children (cons ret children))
207 (goto-char (mime::content-info/point-max ret))
208 (goto-char (setq cb ncb))
211 (setq ce (point-max))
213 (narrow-to-region cb ce)
214 (setq ret (mime-parse-message dc-ctl "7bit" (cons i rcnum)))
216 (setq children (cons ret children))
218 (mime::content-info/create rcnum beg (point-max)
219 ctype params encoding
223 (defun mime-parse-message (&optional ctl encoding rcnum)
224 "Parse current-buffer as a MIME message. [mime-parse.el]"
225 (setq ctl (or (mime/Content-Type) ctl))
226 (setq encoding (or (mime/Content-Transfer-Encoding) encoding))
227 (let ((ctype (car ctl))
230 (let ((boundary (assoc "boundary" params)))
232 (setq boundary (std11-strip-quoted-string (cdr boundary)))
233 (mime-parse-multipart boundary ctype params encoding rcnum)
235 ((or (string-equal ctype "message/rfc822")
236 (string-equal ctype "message/news")
238 (goto-char (point-min))
239 (mime::content-info/create rcnum
240 (point-min) (point-max)
241 ctype params encoding
244 (if (re-search-forward "^$" nil t)
249 (list (mime-parse-message
250 nil nil (cons 0 rcnum)))
255 (mime::content-info/create rcnum (point-min) (point-max)
256 ctype params encoding nil)
264 (provide 'mime-parse)
266 ;;; mime-parse.el ends here