mime-lib.el

   1 ;;; mime-lib.el --- MIME library module
   2
   3 ;; Copyright (C) 1998 Free Software Foundation, Inc.
   4
   5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
   6 ;; Keywords: MIME, multimedia, mail, news
   7
   8 ;; This file is part of FLIM (Faithful Library about Internet Message).
   9
  10 ;; This program is free software; you can redistribute it and/or
  11 ;; modify it under the terms of the GNU General Public License as
  12 ;; published by the Free Software Foundation; either version 2, or (at
  13 ;; your option) any later version.
  14
  15 ;; This program is distributed in the hope that it will be useful, but
  16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 ;; General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Code:
  26
  27 (require 'alist)
  28 (require 'std11)
  29 (require 'mime-def)
  30 (require 'eword-decode)
  31
  32 (defun mime-entity-fetch-field (entity field-name)
  33   (or (symbolp field-name)
  34       (setq field-name (intern (capitalize (capitalize field-name)))))
  35   (let* ((header (mime-entity-original-header entity))
  36          (field-body (cdr (assq field-name header))))
  37     (or field-body
  38         (save-excursion
  39           (if (save-restriction
  40                 (set-buffer (mime-entity-buffer entity))
  41                 (narrow-to-region (mime-entity-header-start entity)
  42                                   (mime-entity-header-end entity))
  43                 (setq field-body (std11-fetch-field (symbol-name field-name)))
  44                 )
  45               (mime-entity-set-original-header
  46                entity (put-alist field-name field-body header))
  47             )
  48           field-body))))
  49
  50 (defun mime-entity-read-field (entity field-name)
  51   (or (symbolp field-name)
  52       (setq field-name (capitalize (capitalize field-name))))
  53   (cond ((eq field-name 'Content-Type)
  54          (mime-entity-content-type entity)
  55          )
  56         ((eq field-name 'Content-Disposition)
  57          (mime-entity-content-disposition entity)
  58          )
  59         ((eq field-name 'Content-Transfer-Encoding)
  60          (mime-entity-encoding entity)
  61          )
  62         (t
  63          (let* ((header (mime-entity-parsed-header entity))
  64                 (field (cdr (assq field-name header))))
  65            (or field
  66                (let ((field-body (mime-entity-fetch-field entity field-name)))
  67                  (when field-body
  68                    (cond ((memq field-name '(From
  69                                              To Recent-To
  70                                              Cc Recent-Cc
  71                                              Bcc Resent-Bcc))
  72                           (setq field (std11-parse-addresses
  73                                        (eword-lexical-analyze field-body)))
  74                           )
  75                          ((eq field-name 'Sender)
  76                           (setq field (std11-parse-address
  77                                        (eword-lexical-analyze field-body)))
  78                           )
  79                          ((memq field-name eword-decode-structured-field-list)
  80                           (setq field (eword-decode-structured-field-body
  81                                        field-body)))
  82                          (t
  83                           (setq field (eword-decode-unstructured-field-body
  84                                        field-body))
  85                           ))
  86                    (mime-entity-set-parsed-header
  87                     entity (put-alist field-name field header))
  88                    field)))))))
  89
  90
  91 ;;; @ end
  92 ;;;
  93
  94 (provide 'mime-lib)
  95
  96 ;;; mime-lib.el ends here