lisp/gnus/mm-extern.el

   1 ;;; mm-extern.el --- showing message/external-body
   2
   3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   5
   6 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
   7 ;; Keywords: message external-body
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 ;; For Emacs < 22.2.
  29 (eval-and-compile
  30   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  31
  32 (eval-when-compile (require 'cl))
  33
  34 (require 'mm-util)
  35 (require 'mm-decode)
  36 (require 'mm-url)
  37
  38 (defvar gnus-article-mime-handles)
  39
  40 (defvar mm-extern-function-alist
  41   '((local-file . mm-extern-local-file)
  42     (url . mm-extern-url)
  43     (anon-ftp . mm-extern-anon-ftp)
  44     (ftp . mm-extern-ftp)
  45 ;;;     (tftp . mm-extern-tftp)
  46     (mail-server . mm-extern-mail-server)
  47 ;;;     (afs . mm-extern-afs))
  48     ))
  49
  50 (defvar mm-extern-anonymous "anonymous")
  51
  52 (defun mm-extern-local-file (handle)
  53   (erase-buffer)
  54   (let ((name (cdr (assq 'name (cdr (mm-handle-type handle)))))
  55         (coding-system-for-read mm-binary-coding-system))
  56     (unless name
  57       (error "The filename is not specified"))
  58     (mm-disable-multibyte)
  59     (if (file-exists-p name)
  60         (mm-insert-file-contents name nil nil nil nil t)
  61       (error "File %s is gone" name))))
  62
  63 (defun mm-extern-url (handle)
  64   (erase-buffer)
  65   (let ((url (cdr (assq 'url (cdr (mm-handle-type handle)))))
  66         (name buffer-file-name)
  67         (coding-system-for-read mm-binary-coding-system))
  68     (unless url
  69       (error "URL is not specified"))
  70     (mm-disable-multibyte)
  71     (mm-url-insert-file-contents url)
  72     (setq buffer-file-name name)))
  73
  74 (defun mm-extern-anon-ftp (handle)
  75   (erase-buffer)
  76   (let* ((params (cdr (mm-handle-type handle)))
  77          (name (cdr (assq 'name params)))
  78          (site (cdr (assq 'site params)))
  79          (directory (cdr (assq 'directory params)))
  80          (mode (cdr (assq 'mode params)))
  81          (path (concat "/" (or mm-extern-anonymous
  82                                (read-string (format "ID for %s: " site)))
  83                        "@" site ":" directory "/" name))
  84          (coding-system-for-read mm-binary-coding-system))
  85     (unless name
  86       (error "The filename is not specified"))
  87     (mm-disable-multibyte)
  88     (mm-insert-file-contents path nil nil nil nil t)))
  89
  90 (defun mm-extern-ftp (handle)
  91   (let (mm-extern-anonymous)
  92     (mm-extern-anon-ftp handle)))
  93
  94 (declare-function message-goto-body "message" (&optional interactivep))
  95
  96 (defun mm-extern-mail-server (handle)
  97   (require 'message)
  98   (let* ((params (cdr (mm-handle-type handle)))
  99          (server (cdr (assq 'server params)))
 100          (subject (or (cdr (assq 'subject params)) "none"))
 101          (buf (current-buffer))
 102          info)
 103     (if (y-or-n-p (format "Send a request message to %s? " server))
 104         (save-window-excursion
 105           (message-mail server subject)
 106           (message-goto-body)
 107           (delete-region (point) (point-max))
 108           (insert-buffer-substring buf)
 109           (message "Requesting external body...")
 110           (message-send-and-exit)
 111           (setq info "Request is sent.")
 112           (message info))
 113       (setq info "Request is not sent."))
 114     (goto-char (point-min))
 115     (insert "[" info "]\n\n")))
 116
 117 ;;;###autoload
 118 (defun mm-extern-cache-contents (handle)
 119   "Put the external-body part of HANDLE into its cache."
 120   (let* ((access-type (cdr (assq 'access-type
 121                                  (cdr (mm-handle-type handle)))))
 122          (func (cdr (assq (intern
 123                            (downcase
 124                             (or access-type
 125                                 (error "Couldn't find access type"))))
 126                           mm-extern-function-alist)))
 127          handles)
 128     (unless func
 129       (error "Access type (%s) is not supported" access-type))
 130     (mm-with-part handle
 131       (goto-char (point-max))
 132       (insert "\n\n")
 133       ;; It should be just a single MIME handle.
 134       (setq handles (mm-dissect-buffer t)))
 135     (unless (bufferp (car handles))
 136       (mm-destroy-parts handles)
 137       (error "Multipart external body is not supported"))
 138     (with-current-buffer (mm-handle-buffer handles)
 139       (let (good)
 140         (unwind-protect
 141             (progn
 142               (funcall func handle)
 143               (setq good t))
 144           (unless good
 145             (mm-destroy-parts handles))))
 146       (mm-handle-set-cache handle handles))
 147     (setq gnus-article-mime-handles
 148           (mm-merge-handles gnus-article-mime-handles handles))))
 149
 150 ;;;###autoload
 151 (defun mm-inline-external-body (handle &optional no-display)
 152   "Show the external-body part of HANDLE.
 153 This function replaces the buffer of HANDLE with a buffer contains
 154 the entire message.
 155 If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
 156   (unless (mm-handle-cache handle)
 157     (mm-extern-cache-contents handle))
 158   (unless no-display
 159     (save-excursion
 160       (save-restriction
 161         (narrow-to-region (point) (point))
 162         (mm-display-part (mm-handle-cache handle))))
 163     ;; Move undisplayer added to the cached handle to the parent.
 164     (mm-handle-set-undisplayer
 165      handle (mm-handle-undisplayer (mm-handle-cache handle)))
 166     (mm-handle-set-undisplayer (mm-handle-cache handle) nil)))
 167
 168 (provide 'mm-extern)
 169
 170 ;; arch-tag: 9653808e-14d9-4172-86e6-adceaa05378e
 171 ;;; mm-extern.el ends here