lisp/url/url-cid.el

   1 ;;; url-cid.el --- Content-ID URL loader
   2
   3 ;; Copyright (C) 1998, 1999, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   4
   5 ;; Keywords: comm, data, processes
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 3, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22 ;; Boston, MA 02110-1301, USA.
  23
  24 ;;; Code:
  25
  26 (require 'url-vars)
  27 (require 'url-parse)
  28
  29 (require 'mm-decode)
  30
  31 (defun url-cid-gnus (cid)
  32   (let ((content-type nil)
  33         (encoding nil)
  34         (part nil)
  35         (data nil))
  36     (setq part (mm-get-content-id cid))
  37     (if (not part)
  38         (message "Unknown CID encountered: %s" cid)
  39       (setq data (save-excursion
  40                    (set-buffer (mm-handle-buffer part))
  41                    (buffer-string))
  42             content-type (mm-handle-type part)
  43             encoding (symbol-name (mm-handle-encoding part)))
  44       (if (= 0 (length content-type)) (setq content-type "text/plain"))
  45       (if (= 0 (length encoding)) (setq encoding "8bit"))
  46       (if (listp content-type)
  47           (setq content-type (car content-type)))
  48       (insert (format "Content-type: %d\r\n"  (length data))
  49               "Content-type: " content-type "\r\n"
  50               "Content-transfer-encoding: " encoding "\r\n"
  51               "\r\n"
  52               (or data "")))))
  53
  54 ;;;###autoload
  55 (defun url-cid (url)
  56   (cond
  57    ((fboundp 'mm-get-content-id)
  58     ;; Using Pterodactyl Gnus or later
  59     (save-excursion
  60       (set-buffer (generate-new-buffer " *url-cid*"))
  61       (url-cid-gnus (url-filename url))))
  62    (t
  63     (message "Unable to handle CID URL: %s" url))))
  64
  65 ;; arch-tag: 23d9ab74-fad4-4dba-b1e7-292871e8bda5
  66 ;;; url-cid.el ends here