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-fetch-field (field-name &optional entity)
  67   (or (symbolp field-name)
  68       (setq field-name (intern (capitalize (capitalize field-name)))))
  69   (or entity
  70       (setq entity mime-message-structure))
  71   (let* ((header (mime-entity-original-header entity))
  72          (field-body (cdr (assq field-name header))))
  73     (or field-body
  74         (progn
  75           (if (save-excursion
  76                 (set-buffer (mime-entity-buffer entity))
  77                 (save-restriction
  78                   (narrow-to-region (mime-entity-header-start entity)
  79                                     (mime-entity-header-end entity))
  80                   (setq field-body
  81                         (std11-fetch-field (symbol-name field-name)))
  82                   ))
  83               (mime-entity-set-original-header
  84                entity (put-alist field-name field-body header))
  85             )
  86           field-body))))
  87
  88 (defun mime-read-field (field-name &optional entity)
  89   (or (symbolp field-name)
  90       (setq field-name (capitalize (capitalize field-name))))
  91   (or entity
  92       (setq entity mime-message-structure))
  93   (cond ((eq field-name 'Content-Type)
  94          (mime-entity-content-type entity)
  95          )
  96         ((eq field-name 'Content-Disposition)
  97          (mime-entity-content-disposition entity)
  98          )
  99         ((eq field-name 'Content-Transfer-Encoding)
 100          (mime-entity-encoding entity)
 101          )
 102         (t
 103          (let* ((header (mime-entity-parsed-header entity))
 104                 (field (cdr (assq field-name header))))
 105            (or field
 106                (let ((field-body (mime-fetch-field field-name entity)))
 107                  (when field-body
 108                    (cond ((memq field-name '(From Resent-From
 109                                              To Resent-To
 110                                              Cc Resent-Cc
 111                                              Bcc Resent-Bcc
 112                                              Reply-To Resent-Reply-To))
 113                           (setq field (std11-parse-addresses
 114                                        (eword-lexical-analyze field-body)))
 115                           )
 116                          ((eq field-name '(Sender Resent-Sender))
 117                           (setq field (std11-parse-address
 118                                        (eword-lexical-analyze field-body)))
 119                           )
 120                          ((memq field-name eword-decode-ignored-field-list)
 121                           (setq field field-body))
 122                          ((memq field-name eword-decode-structured-field-list)
 123                           (setq field (eword-decode-structured-field-body
 124                                        field-body)))
 125                          (t
 126                           (setq field (eword-decode-unstructured-field-body
 127                                        field-body))
 128                           ))
 129                    (mime-entity-set-parsed-header
 130                     entity (put-alist field-name field header))
 131                    field)))))))
 132
 133 (defun mime-entity-content (entity)
 134   (save-excursion
 135     (set-buffer (mime-entity-buffer entity))
 136     (mime-decode-string (buffer-substring (mime-entity-body-start entity)
 137                                           (mime-entity-body-end entity))
 138                         (mime-entity-encoding entity))))
 139
 140 (defsubst mime-root-entity-p (entity)
 141   "Return t if ENTITY is root-entity (message)."
 142   (null (mime-entity-node-id entity)))
 143
 144
 145 ;;; @ end
 146 ;;;
 147
 148 (provide 'mime)
 149
 150 ;;; mime.el ends here