mime.el

   1 ;;; mime.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 (autoload 'eword-encode-field "eword-encode"
  33   "Encode header field STRING, and return the result.")
  34 (autoload 'eword-encode-header "eword-encode"
  35   "Encode header fields to network representation, such as MIME encoded-word.")
  36
  37
  38 (autoload 'mime-parse-Content-Type "mime-parse"
  39   "Parse STRING as field-body of Content-Type field.")
  40 (autoload 'mime-read-Content-Type "mime-parse"
  41   "Read field-body of Content-Type field from current-buffer,
  42 and return parsed it.")
  43
  44 (autoload 'mime-parse-Content-Transfer-Encoding "mime-parse"
  45   "Parse STRING as field-body of Content-Transfer-Encoding field.")
  46 (autoload 'mime-read-Content-Transfer-Encoding "mime-parse"
  47   "Read field-body of Content-Transfer-Encoding field from
  48 current-buffer, and return it.")
  49
  50 (autoload 'mime-parse-message "mime-parse"
  51   "Parse current-buffer as a MIME message.")
  52
  53 (autoload 'mime-parse-buffer "mime-parse"
  54   "Parse BUFFER as a MIME message.")
  55
  56
  57 ;;; @ Content-Disposition
  58 ;;;
  59
  60 (autoload 'mime-parse-Content-Disposition "mime-parse"
  61   "Parse STRING as field-body of Content-Disposition field.")
  62
  63 (autoload 'mime-read-Content-Disposition "mime-parse"
  64   "Read field-body of Content-Disposition field from current-buffer,
  65 and return parsed it.")
  66
  67 (defsubst mime-content-disposition-parameter (content-disposition parameter)
  68   "Return PARAMETER value of CONTENT-DISPOSITION."
  69   (cdr (assoc parameter (cdr content-disposition))))
  70
  71 (defsubst mime-content-disposition-filename (content-disposition)
  72   "Return filename of CONTENT-DISPOSITION."
  73   (mime-content-disposition-parameter content-disposition "filename"))
  74
  75
  76 ;;; @ MIME entity
  77 ;;;
  78
  79 (defun mime-entity-fetch-field (entity field-name)
  80   (or (symbolp field-name)
  81       (setq field-name (intern (capitalize (capitalize field-name)))))
  82   (let* ((header (mime-entity-original-header entity))
  83          (field-body (cdr (assq field-name header))))
  84     (or field-body
  85         (progn
  86           (if (save-excursion
  87                 (set-buffer (mime-entity-buffer entity))
  88                 (save-restriction
  89                   (narrow-to-region (mime-entity-header-start entity)
  90                                     (mime-entity-header-end entity))
  91                   (setq field-body
  92                         (std11-fetch-field (symbol-name field-name)))
  93                   ))
  94               (mime-entity-set-original-header
  95                entity (put-alist field-name field-body header))
  96             )
  97           field-body))))
  98
  99 (defun mime-entity-read-field (entity field-name)
 100   (or (symbolp field-name)
 101       (setq field-name (capitalize (capitalize field-name))))
 102   (cond ((eq field-name 'Content-Type)
 103          (mime-entity-content-type entity)
 104          )
 105         ((eq field-name 'Content-Disposition)
 106          (mime-entity-content-disposition entity)
 107          )
 108         ((eq field-name 'Content-Transfer-Encoding)
 109          (mime-entity-encoding entity)
 110          )
 111         (t
 112          (let* ((header (mime-entity-parsed-header entity))
 113                 (field (cdr (assq field-name header))))
 114            (or field
 115                (let ((field-body (mime-entity-fetch-field entity field-name)))
 116                  (when field-body
 117                    (cond ((memq field-name '(From Resent-From
 118                                              To Resent-To
 119                                              Cc Resent-Cc
 120                                              Bcc Resent-Bcc
 121                                              Reply-To Resent-Reply-To))
 122                           (setq field (std11-parse-addresses
 123                                        (eword-lexical-analyze field-body)))
 124                           )
 125                          ((eq field-name '(Sender Resent-Sender))
 126                           (setq field (std11-parse-address
 127                                        (eword-lexical-analyze field-body)))
 128                           )
 129                          ((memq field-name eword-decode-ignored-field-list)
 130                           (setq field field-body))
 131                          ((memq field-name eword-decode-structured-field-list)
 132                           (setq field (eword-decode-structured-field-body
 133                                        field-body)))
 134                          (t
 135                           (setq field (eword-decode-unstructured-field-body
 136                                        field-body))
 137                           ))
 138                    (mime-entity-set-parsed-header
 139                     entity (put-alist field-name field header))
 140                    field)))))))
 141
 142 (defun mime-entity-content (entity)
 143   (save-excursion
 144     (set-buffer (mime-entity-buffer entity))
 145     (mime-decode-string (buffer-substring (mime-entity-body-start entity)
 146                                           (mime-entity-body-end entity))
 147                         (mime-entity-encoding entity))))
 148
 149 (defsubst mime-root-entity-p (entity)
 150   "Return t if ENTITY is root-entity (message)."
 151   (null (mime-entity-node-id entity)))
 152
 153
 154 ;;; @ end
 155 ;;;
 156
 157 (provide 'mime)
 158
 159 ;;; mime.el ends here