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
  33 (autoload 'mime-parse-Content-Type "mime-parse"
  34   "Parse STRING as field-body of Content-Type field.")
  35
  36 (autoload 'mime-read-Content-Type "mime-parse"
  37   "Read field-body of Content-Type field from current-buffer,
  38 and return parsed it.")
  39
  40 (autoload 'mime-parse-Content-Disposition "mime-parse"
  41   "Parse STRING as field-body of Content-Disposition field.")
  42
  43 (autoload 'mime-read-Content-Disposition "mime-parse"
  44   "Read field-body of Content-Disposition field from current-buffer,
  45 and return parsed it.")
  46
  47 (autoload 'mime-parse-Content-Transfer-Encoding "mime-parse"
  48   "Parse STRING as field-body of Content-Transfer-Encoding field.")
  49
  50 (autoload 'mime-read-Content-Transfer-Encoding "mime-parse"
  51   "Read field-body of Content-Transfer-Encoding field from
  52 current-buffer, and return it.")
  53
  54 (autoload 'mime-parse-message "mime-parse"
  55   "Parse current-buffer as a MIME message.")
  56
  57 (autoload 'mime-parse-buffer "mime-parse"
  58   "Parse BUFFER as a MIME message.")
  59
  60
  61 ;;; @ MIME entity
  62 ;;;
  63
  64 (defun mime-entity-fetch-field (entity field-name)
  65   (or (symbolp field-name)
  66       (setq field-name (intern (capitalize (capitalize field-name)))))
  67   (let* ((header (mime-entity-original-header entity))
  68          (field-body (cdr (assq field-name header))))
  69     (or field-body
  70         (progn
  71           (if (save-excursion
  72                 (set-buffer (mime-entity-buffer entity))
  73                 (save-restriction
  74                   (narrow-to-region (mime-entity-header-start entity)
  75                                     (mime-entity-header-end entity))
  76                   (setq field-body
  77                         (std11-fetch-field (symbol-name field-name)))
  78                   ))
  79               (mime-entity-set-original-header
  80                entity (put-alist field-name field-body header))
  81             )
  82           field-body))))
  83
  84 (defun mime-entity-read-field (entity field-name)
  85   (or (symbolp field-name)
  86       (setq field-name (capitalize (capitalize field-name))))
  87   (cond ((eq field-name 'Content-Type)
  88          (mime-entity-content-type entity)
  89          )
  90         ((eq field-name 'Content-Disposition)
  91          (mime-entity-content-disposition entity)
  92          )
  93         ((eq field-name 'Content-Transfer-Encoding)
  94          (mime-entity-encoding entity)
  95          )
  96         (t
  97          (let* ((header (mime-entity-parsed-header entity))
  98                 (field (cdr (assq field-name header))))
  99            (or field
 100                (let ((field-body (mime-entity-fetch-field entity field-name)))
 101                  (when field-body
 102                    (cond ((memq field-name '(From Resent-From
 103                                              To Resent-To
 104                                              Cc Resent-Cc
 105                                              Bcc Resent-Bcc
 106                                              Reply-To Resent-Reply-To))
 107                           (setq field (std11-parse-addresses
 108                                        (eword-lexical-analyze field-body)))
 109                           )
 110                          ((eq field-name '(Sender Resent-Sender))
 111                           (setq field (std11-parse-address
 112                                        (eword-lexical-analyze field-body)))
 113                           )
 114                          ((memq field-name eword-decode-ignored-field-list)
 115                           (setq field field-body))
 116                          ((memq field-name eword-decode-structured-field-list)
 117                           (setq field (eword-decode-structured-field-body
 118                                        field-body)))
 119                          (t
 120                           (setq field (eword-decode-unstructured-field-body
 121                                        field-body))
 122                           ))
 123                    (mime-entity-set-parsed-header
 124                     entity (put-alist field-name field header))
 125                    field)))))))
 126
 127 (defsubst mime-root-entity-p (entity)
 128   "Return t if ENTITY is root-entity (message)."
 129   (null (mime-entity-node-id entity)))
 130
 131
 132 ;;; @ end
 133 ;;;
 134
 135 (provide 'mime-lib)
 136
 137 ;;; mime-lib.el ends here