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comparison lisp/tm/tm-parse.el @ 4:b82b59fe008d r19-15b3

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Import from CVS: tag r19-15b3
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date Mon, 13 Aug 2007 08:46:56 +0200
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3:30df88044ec6 4:b82b59fe008d
1 ;;; tm-parse.el --- MIME message parser
2
3 ;; Copyright (C) 1994,1995,1996 Free Software Foundation, Inc.
4
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Version: $Id: tm-parse.el,v 1.1.1.1 1996/12/18 03:55:32 steve Exp $
7 ;; Keywords: mail, news, MIME, multimedia
8
9 ;; This file is part of tm (Tools for MIME).
10
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.
15
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.
20
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.
25
26 ;;; Code:
27
28 (require 'tl-822)
29 (require 'tl-misc)
30 (require 'tm-def)
31
32
33 ;;; @ field parser
34 ;;;
35
36 (defconst mime/content-parameter-value-regexp
37 (concat "\\("
38 rfc822/quoted-string-regexp
39 "\\|[^; \t\n]*\\)"))
40
41 (defconst mime::parameter-regexp
42 (concat "^[ \t]*\;[ \t]*\\(" mime/token-regexp "\\)"
43 "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
44
45 (defun mime/parse-parameter (str)
46 (if (string-match mime::parameter-regexp str)
47 (let ((e (match-end 2)))
48 (cons
49 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
50 (std11-strip-quoted-string
51 (substring str (match-beginning 2) e))
52 )
53 (substring str e)
54 ))))
55
56 (defconst mime::ctype-regexp (concat "^" mime/content-type-subtype-regexp))
57
58 (defun mime/parse-Content-Type (string)
59 "Parse STRING as field-body of Content-Type field. [tm-parse.el]"
60 (setq string (std11-unfold-string string))
61 (if (string-match mime::ctype-regexp string)
62 (let* ((e (match-end 0))
63 (ctype (downcase (substring string 0 e)))
64 ret dest)
65 (setq string (substring string e))
66 (while (setq ret (mime/parse-parameter string))
67 (setq dest (cons (car ret) dest)
68 string (cdr ret))
69 )
70 (cons ctype (nreverse dest))
71 )))
72
73 (defconst mime::dtype-regexp (concat "^" mime/disposition-type-regexp))
74
75 (defun mime/parse-Content-Disposition (string)
76 "Parse STRING as field-body of Content-Disposition field. [tm-parse.el]"
77 (setq string (std11-unfold-string string))
78 (if (string-match mime::dtype-regexp string)
79 (let* ((e (match-end 0))
80 (ctype (downcase (substring string 0 e)))
81 ret dest)
82 (setq string (substring string e))
83 (while (setq ret (mime/parse-parameter string))
84 (setq dest (cons (car ret) dest)
85 string (cdr ret))
86 )
87 (cons ctype (nreverse dest))
88 )))
89
90
91 ;;; @ field reader
92 ;;;
93
94 (defun mime/Content-Type ()
95 "Read field-body of Content-Type field from current-buffer,
96 and return parsed it. [tm-parse.el]"
97 (let ((str (std11-field-body "Content-Type")))
98 (if str
99 (mime/parse-Content-Type str)
100 )))
101
102 (defun mime/Content-Transfer-Encoding (&optional default-encoding)
103 "Read field-body of Content-Transfer-Encoding field from
104 current-buffer, and return it.
105 If is is not found, return DEFAULT-ENCODING. [tm-parse.el]"
106 (let ((str (std11-field-body "Content-Transfer-Encoding")))
107 (if str
108 (progn
109 (if (string-match "[ \t\n\r]+$" str)
110 (setq str (substring str 0 (match-beginning 0)))
111 )
112 (downcase str)
113 )
114 default-encoding)
115 ))
116
117 (defun mime/Content-Disposition ()
118 "Read field-body of Content-Disposition field from current-buffer,
119 and return parsed it. [tm-parse.el]"
120 (let ((str (std11-field-body "Content-Disposition")))
121 (if str
122 (mime/parse-Content-Disposition str)
123 )))
124
125
126 ;;; @ message parser
127 ;;;
128
129 (define-structure mime::content-info
130 rcnum point-min point-max type parameters encoding children)
131
132
133 (defun mime/parse-multipart (boundary ctype params encoding rcnum)
134 (goto-char (point-min))
135 (let* ((dash-boundary (concat "--" boundary))
136 (delimiter (concat "\n" (regexp-quote dash-boundary)))
137 (close-delimiter (concat delimiter "--[ \t]*$"))
138 (beg (point-min))
139 (end (progn
140 (goto-char (point-max))
141 (if (re-search-backward close-delimiter nil t)
142 (match-beginning 0)
143 (point-max)
144 )))
145 (rsep (concat delimiter "[ \t]*\n"))
146 (dc-ctl
147 (if (string-equal ctype "multipart/digest")
148 '("message/rfc822")
149 '("text/plain")
150 ))
151 cb ce ct ret ncb children (i 0))
152 (save-restriction
153 (narrow-to-region beg end)
154 (goto-char beg)
155 (re-search-forward rsep nil t)
156 (setq cb (match-end 0))
157 (while (re-search-forward rsep nil t)
158 (setq ce (match-beginning 0))
159 (setq ncb (match-end 0))
160 (save-restriction
161 (narrow-to-region cb ce)
162 (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
163 )
164 (setq children (cons ret children))
165 (goto-char (mime::content-info/point-max ret))
166 (goto-char (setq cb ncb))
167 (setq i (1+ i))
168 )
169 (setq ce (point-max))
170 (save-restriction
171 (narrow-to-region cb ce)
172 (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
173 )
174 (setq children (cons ret children))
175 )
176 (mime::content-info/create rcnum beg (point-max)
177 ctype params encoding
178 (nreverse children))
179 ))
180
181 (defun mime/parse-message (&optional ctl encoding rcnum)
182 "Parse current-buffer as a MIME message. [tm-parse.el]"
183 (setq ctl (or (mime/Content-Type) ctl))
184 (setq encoding (or (mime/Content-Transfer-Encoding) encoding))
185 (let ((ctype (car ctl))
186 (params (cdr ctl))
187 )
188 (let ((boundary (assoc "boundary" params)))
189 (cond (boundary
190 (setq boundary (std11-strip-quoted-string (cdr boundary)))
191 (mime/parse-multipart boundary ctype params encoding rcnum)
192 )
193 ((or (string-equal ctype "message/rfc822")
194 (string-equal ctype "message/news")
195 )
196 (goto-char (point-min))
197 (mime::content-info/create rcnum
198 (point-min) (point-max)
199 ctype params encoding
200 (save-restriction
201 (narrow-to-region
202 (if (re-search-forward "^$" nil t)
203 (1+ (match-end 0))
204 (point-min)
205 )
206 (point-max))
207 (list (mime/parse-message
208 nil nil (cons 0 rcnum)))
209 )
210 )
211 )
212 (t
213 (mime::content-info/create rcnum (point-min) (point-max)
214 ctype params encoding nil)
215 ))
216 )))
217
218
219 ;;; @ end
220 ;;;
221
222 (provide 'tm-parse)
223
224 ;;; tm-parse.el ends here