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