2 ;;; tm-parse.el --- MIME message parser
4 ;;; Copyright (C) 1995 Free Software Foundation, Inc.
5 ;;; Copyright (C) 1994,1995 MORIOKA Tomohiko
7 ;;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
9 ;;; $Id: tm-parse.el,v 7.0 1995/12/09 01:56:28 morioka Exp $
10 ;;; Keywords: mail, news, MIME, multimedia
12 ;;; This file is part of tm (Tools for MIME).
14 ;;; This program is free software; you can redistribute it and/or
15 ;;; modify it under the terms of the GNU General Public License as
16 ;;; published by the Free Software Foundation; either version 2, or
17 ;;; (at your option) any later version.
19 ;;; This program is distributed in the hope that it will be useful,
20 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 ;;; General Public License for more details.
24 ;;; You should have received a copy of the GNU General Public License
25 ;;; along with This program. If not, write to the Free Software
26 ;;; Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
38 (defconst mime::parameter-regexp
39 (concat "^[ \t]*\;[ \t]*\\(" mime/token-regexp "\\)"
40 "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
42 (defun mime/parse-parameter (str)
43 (if (string-match mime::parameter-regexp str)
44 (let ((e (match-end 2)))
46 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
47 (rfc822/strip-quoted-string
48 (substring str (match-beginning 2) e))
53 (defconst mime::ctype-regexp
54 (concat "^" mime/content-type-subtype-regexp))
56 (defun mime/parse-Content-Type (str)
57 "Parse STR as field-body of Content-Type field. [tm-parse.el]"
58 (setq str (rfc822/unfolding-string str))
59 (if (string-match mime::ctype-regexp str)
60 (let* ((e (match-end 0))
61 (ctype (downcase (substring str 0 e)))
63 (setq str (substring str e))
64 (while (setq ret (mime/parse-parameter str))
65 (setq dest (cons (car ret) dest))
68 (cons ctype (reverse dest))
75 (defun mime/Content-Type ()
76 "Read field-body of Content-Type field from current-buffer,
77 and return parsed it. [tm-parse.el]"
78 (let ((str (rfc822/get-field-body "Content-Type")))
80 (mime/parse-Content-Type str)
83 (defun mime/Content-Transfer-Encoding (&optional default-encoding)
84 "Read field-body of Content-Transfer-Encoding field from
85 current-buffer, and return it.
86 If is is not found, return DEFAULT-ENCODING. [tm-parse.el]"
87 (let ((str (rfc822/get-field-body "Content-Transfer-Encoding")))
97 (define-structure mime::content-info
98 rcnum point-min point-max type parameters encoding children)
101 (defun mime/parse-multipart (boundary ctype params encoding rcnum)
102 (goto-char (point-min))
103 (let* ((dash-boundary (concat "--" boundary))
104 (delimiter (concat "\n" dash-boundary))
105 (close-delimiter (concat delimiter "--"))
107 (end (if (search-forward close-delimiter nil t)
111 (rsep (concat (regexp-quote delimiter) "[ \t]*\n"))
113 (cond ((string= ctype "multipart/digest") '("message/rfc822"))
116 cb ce ct ret ncb children (i 0))
118 (narrow-to-region beg end)
120 (re-search-forward rsep nil t)
121 (setq cb (match-end 0))
122 (while (re-search-forward rsep nil t)
123 (setq ce (match-beginning 0))
124 (setq ncb (match-end 0))
126 (narrow-to-region cb ce)
127 (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
129 (setq children (cons ret children))
130 (goto-char (mime::content-info/point-max ret))
131 (goto-char (setq cb ncb))
134 (setq ce (point-max))
136 (narrow-to-region cb ce)
137 (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
139 (setq children (cons ret children))
141 (mime::content-info/create rcnum beg (point-max)
142 ctype params encoding
146 (defun mime/parse-message (&optional ctl encoding rcnum)
147 "Parse current-buffer as a MIME message. [tm-parse.el]"
148 (setq ctl (or (mime/Content-Type) ctl))
149 (setq encoding (or (mime/Content-Transfer-Encoding) encoding))
150 (let ((ctype (car ctl))
153 (let ((boundary (assoc "boundary" params)))
155 (setq boundary (rfc822/strip-quoted-string (cdr boundary)))
156 (mime/parse-multipart boundary ctype params encoding rcnum)
158 ((string= ctype "message/rfc822")
159 (goto-char (point-min))
160 (mime::content-info/create rcnum
161 (point-min) (point-max)
162 ctype params encoding
165 (if (re-search-forward "^$" nil t)
170 (list (mime/parse-message
171 nil nil (cons 0 rcnum)))
176 (mime::content-info/create rcnum (point-min) (point-max)
177 ctype params encoding nil)