--- /dev/null
+;;; mime-parse.el --- MIME message parser
+
+;; Copyright (C) 1994,1995,1996,1997 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Version: $Id: mime-parse.el,v 0.1 1997-02-21 07:38:26 tmorioka Exp $
+;; Keywords: MIME, multimedia, mail, news
+
+;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
+
+;; 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. [mime-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. [mime-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. [mime-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. [mime-parse.el]"
+ (let ((str (std11-field-body "Content-Transfer-Encoding")))
+ (if str
+ (progn
+ (if (string-match "[ \t\n\r]+$" str)
+ (setq str (substring str 0 (match-beginning 0)))
+ )
+ (downcase str)
+ )
+ default-encoding)
+ ))
+
+(defun mime/Content-Disposition ()
+ "Read field-body of Content-Disposition field from current-buffer,
+and return parsed it. [mime-parse.el]"
+ (let ((str (std11-field-body "Content-Disposition")))
+ (if str
+ (mime-parse-Content-Disposition str)
+ )))
+
+
+;;; @ message parser
+;;;
+
+(define-structure mime::content-info
+ rcnum point-min point-max type parameters encoding children)
+
+
+(defun mime-parse-multipart (boundary ctype params encoding rcnum)
+ (goto-char (point-min))
+ (let* ((dash-boundary (concat "--" boundary))
+ (delimiter (concat "\n" (regexp-quote dash-boundary)))
+ (close-delimiter (concat delimiter "--[ \t]*$"))
+ (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. [mime-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 'mime-parse)
+
+;;; mime-parse.el ends here
projects / elisp / semi.git / commitdiff