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;;; url-cid.el --- Content-ID URL loader
;; Copyright (C) 1998-1999, 2004-2021 Free Software Foundation, Inc.
;; Keywords: comm, data, processes
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'url-vars)
(require 'url-parse)
(require 'mm-decode)
(defun url-cid-gnus (cid)
(let ((content-type nil)
(encoding nil)
(part nil)
(data nil))
(setq part (mm-get-content-id cid))
(if (not part)
(message "Unknown CID encountered: %s" cid)
(setq data (with-current-buffer (mm-handle-buffer part)
(buffer-string))
content-type (mm-handle-type part)
encoding (symbol-name (mm-handle-encoding part)))
(if (= 0 (length content-type)) (setq content-type "text/plain"))
(if (= 0 (length encoding)) (setq encoding "8bit"))
(if (listp content-type)
(setq content-type (car content-type)))
(insert (format "Content-length: %d\r\n" (length data))
"Content-type: " content-type "\r\n"
"Content-transfer-encoding: " encoding "\r\n"
"\r\n"
(or data "")))))
;;;###autoload
(defun url-cid (url)
(cond
((fboundp 'mm-get-content-id)
;; Using Pterodactyl Gnus or later
(with-current-buffer (generate-new-buffer " *url-cid*")
(url-cid-gnus (url-filename url))))
(t
(message "Unable to handle CID URL: %s" url))))
;;; url-cid.el ends here
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