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 0.5 1997-02-27 13:43:38 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 (defsubst symbol-concat (&rest args)
32 "Return a symbol whose name is concatenation of arguments ARGS
33 which are string or symbol."
34 (intern (apply (function concat)
37 (cond ((symbolp s) (symbol-name s))
42 (defmacro define-structure (name &rest slots)
43 (let ((pred (symbol-concat name '-p)))
47 (` (defun (, pred) (obj)
49 (eq (elt obj 0) '(, name))
52 (` (defun (, (symbol-concat name '/create)) (, slots)
53 (, (cons 'vector (cons (list 'quote name) slots)))
60 (` (defun (, (symbol-concat name '/ slot)) (obj)
69 (list (list 'quote name))
76 (defsubst regexp-* (regexp)
79 (defconst rfc822/quoted-pair-regexp "\\\\.")
80 (defconst rfc822/qtext-regexp
81 (concat "[^" (char-list-to-string std11-non-qtext-char-list) "]"))
82 (defconst rfc822/quoted-string-regexp
85 (regexp-or rfc822/qtext-regexp rfc822/quoted-pair-regexp)
89 (defconst mime/content-parameter-value-regexp
91 rfc822/quoted-string-regexp
94 (defconst mime::parameter-regexp
95 (concat "^[ \t]*\;[ \t]*\\(" mime/token-regexp "\\)"
96 "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
98 (defun mime-parse-parameter (str)
99 (if (string-match mime::parameter-regexp str)
100 (let ((e (match-end 2)))
102 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
103 (std11-strip-quoted-string
104 (substring str (match-beginning 2) e))
109 (defconst mime::ctype-regexp (concat "^" mime/content-type-subtype-regexp))
111 (defun mime-parse-Content-Type (string)
112 "Parse STRING as field-body of Content-Type field. [mime-parse.el]"
113 (setq string (std11-unfold-string string))
114 (if (string-match mime::ctype-regexp string)
115 (let* ((e (match-end 0))
116 (ctype (downcase (substring string 0 e)))
118 (setq string (substring string e))
119 (while (setq ret (mime-parse-parameter string))
120 (setq dest (cons (car ret) dest)
123 (cons ctype (nreverse dest))
126 (defconst mime::dtype-regexp (concat "^" mime/disposition-type-regexp))
128 (defun mime-parse-Content-Disposition (string)
129 "Parse STRING as field-body of Content-Disposition field. [mime-parse.el]"
130 (setq string (std11-unfold-string string))
131 (if (string-match mime::dtype-regexp string)
132 (let* ((e (match-end 0))
133 (ctype (downcase (substring string 0 e)))
135 (setq string (substring string e))
136 (while (setq ret (mime-parse-parameter string))
137 (setq dest (cons (car ret) dest)
140 (cons ctype (nreverse dest))
147 (defun mime/Content-Type ()
148 "Read field-body of Content-Type field from current-buffer,
149 and return parsed it. [mime-parse.el]"
150 (let ((str (std11-field-body "Content-Type")))
152 (mime-parse-Content-Type str)
155 (defun mime/Content-Transfer-Encoding (&optional default-encoding)
156 "Read field-body of Content-Transfer-Encoding field from
157 current-buffer, and return it.
158 If is is not found, return DEFAULT-ENCODING. [mime-parse.el]"
159 (let ((str (std11-field-body "Content-Transfer-Encoding")))
162 (if (string-match "[ \t\n\r]+$" str)
163 (setq str (substring str 0 (match-beginning 0)))
170 (defun mime/Content-Disposition ()
171 "Read field-body of Content-Disposition field from current-buffer,
172 and return parsed it. [mime-parse.el]"
173 (let ((str (std11-field-body "Content-Disposition")))
175 (mime-parse-Content-Disposition str)
182 (define-structure mime::content-info
183 rcnum point-min point-max type parameters encoding children)
186 (defun mime-parse-multipart (boundary ctype params encoding rcnum)
187 (goto-char (point-min))
188 (let* ((dash-boundary (concat "--" boundary))
189 (delimiter (concat "\n" (regexp-quote dash-boundary)))
190 (close-delimiter (concat delimiter "--[ \t]*$"))
193 (goto-char (point-max))
194 (if (re-search-backward close-delimiter nil t)
198 (rsep (concat delimiter "[ \t]*\n"))
200 (if (string-equal ctype "multipart/digest")
204 cb ce ct ret ncb children (i 0))
206 (narrow-to-region beg end)
208 (re-search-forward rsep nil t)
209 (setq cb (match-end 0))
210 (while (re-search-forward rsep nil t)
211 (setq ce (match-beginning 0))
212 (setq ncb (match-end 0))
214 (narrow-to-region cb ce)
215 (setq ret (mime-parse-message dc-ctl "7bit" (cons i rcnum)))
217 (setq children (cons ret children))
218 (goto-char (mime::content-info/point-max ret))
219 (goto-char (setq cb ncb))
222 (setq ce (point-max))
224 (narrow-to-region cb ce)
225 (setq ret (mime-parse-message dc-ctl "7bit" (cons i rcnum)))
227 (setq children (cons ret children))
229 (mime::content-info/create rcnum beg (point-max)
230 ctype params encoding
234 (defun mime-parse-message (&optional ctl encoding rcnum)
235 "Parse current-buffer as a MIME message. [mime-parse.el]"
236 (setq ctl (or (mime/Content-Type) ctl))
237 (setq encoding (or (mime/Content-Transfer-Encoding) encoding))
238 (let ((ctype (car ctl))
241 (let ((boundary (assoc "boundary" params)))
243 (setq boundary (std11-strip-quoted-string (cdr boundary)))
244 (mime-parse-multipart boundary ctype params encoding rcnum)
246 ((or (string-equal ctype "message/rfc822")
247 (string-equal ctype "message/news")
249 (goto-char (point-min))
250 (mime::content-info/create rcnum
251 (point-min) (point-max)
252 ctype params encoding
255 (if (re-search-forward "^$" nil t)
260 (list (mime-parse-message
261 nil nil (cons 0 rcnum)))
266 (mime::content-info/create rcnum (point-min) (point-max)
267 ctype params encoding nil)
275 (provide 'mime-parse)
277 ;;; mime-parse.el ends here