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- ;;; tm-parse.el --- MIME message parser
-
- ;; Copyright (C) 1994,1995,1996 Free Software Foundation, Inc.
-
- ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
- ;; Version: $Id: tm-parse.el,v 7.16 1996/12/17 11:44:55 morioka Exp $
- ;; Keywords: mail, news, MIME, multimedia
-
- ;; This file is part of tm (Tools for MIME).
-
- ;; This program is free software; you can redistribute it and/or
- ;; modify it under the terms of the GNU General Public License as
- ;; published by the Free Software Foundation; either version 2, or (at
- ;; your option) any later version.
-
- ;; This program is distributed in the hope that it will be useful, but
- ;; WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ;; General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Code:
-
- (require 'std11)
- (require 'tl-misc)
- (require 'tm-def)
-
-
- ;;; @ field parser
- ;;;
-
- (defconst rfc822/quoted-pair-regexp "\\\\.")
- (defconst rfc822/qtext-regexp
- (concat "[^" (char-list-to-string std11-non-qtext-char-list) "]"))
- (defconst rfc822/quoted-string-regexp
- (concat "\""
- (regexp-*
- (regexp-or rfc822/qtext-regexp rfc822/quoted-pair-regexp)
- )
- "\""))
-
- (defconst mime/content-parameter-value-regexp
- (concat "\\("
- rfc822/quoted-string-regexp
- "\\|[^; \t\n]*\\)"))
-
- (defconst mime::parameter-regexp
- (concat "^[ \t]*\;[ \t]*\\(" mime/token-regexp "\\)"
- "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
-
- (defun mime/parse-parameter (str)
- (if (string-match mime::parameter-regexp str)
- (let ((e (match-end 2)))
- (cons
- (cons (downcase (substring str (match-beginning 1) (match-end 1)))
- (std11-strip-quoted-string
- (substring str (match-beginning 2) e))
- )
- (substring str e)
- ))))
-
- (defconst mime::ctype-regexp (concat "^" mime/content-type-subtype-regexp))
-
- (defun mime/parse-Content-Type (string)
- "Parse STRING as field-body of Content-Type field. [tm-parse.el]"
- (setq string (std11-unfold-string string))
- (if (string-match mime::ctype-regexp string)
- (let* ((e (match-end 0))
- (ctype (downcase (substring string 0 e)))
- ret dest)
- (setq string (substring string e))
- (while (setq ret (mime/parse-parameter string))
- (setq dest (cons (car ret) dest)
- string (cdr ret))
- )
- (cons ctype (nreverse dest))
- )))
-
- (defconst mime::dtype-regexp (concat "^" mime/disposition-type-regexp))
-
- (defun mime/parse-Content-Disposition (string)
- "Parse STRING as field-body of Content-Disposition field. [tm-parse.el]"
- (setq string (std11-unfold-string string))
- (if (string-match mime::dtype-regexp string)
- (let* ((e (match-end 0))
- (ctype (downcase (substring string 0 e)))
- ret dest)
- (setq string (substring string e))
- (while (setq ret (mime/parse-parameter string))
- (setq dest (cons (car ret) dest)
- string (cdr ret))
- )
- (cons ctype (nreverse dest))
- )))
-
-
- ;;; @ field reader
- ;;;
-
- (defun mime/Content-Type ()
- "Read field-body of Content-Type field from current-buffer,
- and return parsed it. [tm-parse.el]"
- (let ((str (std11-field-body "Content-Type")))
- (if str
- (mime/parse-Content-Type str)
- )))
-
- (defun mime/Content-Transfer-Encoding (&optional default-encoding)
- "Read field-body of Content-Transfer-Encoding field from
- current-buffer, and return it.
- If is is not found, return DEFAULT-ENCODING. [tm-parse.el]"
- (let ((str (std11-field-body "Content-Transfer-Encoding")))
- (if str
- (progn
- (if (string-match "[ \t\n\r]+$" str)
- (setq str (substring str 0 (match-beginning 0)))
- )
- (downcase str)
- )
- default-encoding)
- ))
-
- (defun mime/Content-Disposition ()
- "Read field-body of Content-Disposition field from current-buffer,
- and return parsed it. [tm-parse.el]"
- (let ((str (std11-field-body "Content-Disposition")))
- (if str
- (mime/parse-Content-Disposition str)
- )))
-
-
- ;;; @ message parser
- ;;;
-
- (define-structure mime::content-info
- rcnum point-min point-max type parameters encoding children)
-
-
- (defun mime/parse-multipart (boundary ctype params encoding rcnum)
- (goto-char (point-min))
- (let* ((dash-boundary (concat "--" boundary))
- (delimiter (concat "\n" (regexp-quote dash-boundary)))
- (close-delimiter (concat delimiter "--[ \t]*$"))
- (beg (point-min))
- (end (progn
- (goto-char (point-max))
- (if (re-search-backward close-delimiter nil t)
- (match-beginning 0)
- (point-max)
- )))
- (rsep (concat delimiter "[ \t]*\n"))
- (dc-ctl
- (if (string-equal ctype "multipart/digest")
- '("message/rfc822")
- '("text/plain")
- ))
- cb ce ct ret ncb children (i 0))
- (save-restriction
- (narrow-to-region beg end)
- (goto-char beg)
- (re-search-forward rsep nil t)
- (setq cb (match-end 0))
- (while (re-search-forward rsep nil t)
- (setq ce (match-beginning 0))
- (setq ncb (match-end 0))
- (save-restriction
- (narrow-to-region cb ce)
- (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
- )
- (setq children (cons ret children))
- (goto-char (mime::content-info/point-max ret))
- (goto-char (setq cb ncb))
- (setq i (1+ i))
- )
- (setq ce (point-max))
- (save-restriction
- (narrow-to-region cb ce)
- (setq ret (mime/parse-message dc-ctl "7bit" (cons i rcnum)))
- )
- (setq children (cons ret children))
- )
- (mime::content-info/create rcnum beg (point-max)
- ctype params encoding
- (nreverse children))
- ))
-
- (defun mime/parse-message (&optional ctl encoding rcnum)
- "Parse current-buffer as a MIME message. [tm-parse.el]"
- (setq ctl (or (mime/Content-Type) ctl))
- (setq encoding (or (mime/Content-Transfer-Encoding) encoding))
- (let ((ctype (car ctl))
- (params (cdr ctl))
- )
- (let ((boundary (assoc "boundary" params)))
- (cond (boundary
- (setq boundary (std11-strip-quoted-string (cdr boundary)))
- (mime/parse-multipart boundary ctype params encoding rcnum)
- )
- ((or (string-equal ctype "message/rfc822")
- (string-equal ctype "message/news")
- )
- (goto-char (point-min))
- (mime::content-info/create rcnum
- (point-min) (point-max)
- ctype params encoding
- (save-restriction
- (narrow-to-region
- (if (re-search-forward "^$" nil t)
- (1+ (match-end 0))
- (point-min)
- )
- (point-max))
- (list (mime/parse-message
- nil nil (cons 0 rcnum)))
- )
- )
- )
- (t
- (mime::content-info/create rcnum (point-min) (point-max)
- ctype params encoding nil)
- ))
- )))
-
-
- ;;; @ end
- ;;;
-
- (provide 'tm-parse)
-
- ;;; tm-parse.el ends here
-