code.delx.au - gnu-emacs/blob - lisp/url/url-misc.el

   1 ;;; url-misc.el --- Misc Uniform Resource Locator retrieval code
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6 ;; Keywords: comm, data, processes
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU 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.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Code:
  24
  25 (eval-when-compile (require 'cl))
  26 (require 'url-vars)
  27 (require 'url-parse)
  28 (autoload 'Info-goto-node "info" "" t)
  29 (autoload 'man "man" nil t)
  30
  31 ;;;###autoload
  32 (defun url-man (url)
  33   "Fetch a Unix manual page URL."
  34   (man (url-filename url))
  35   nil)
  36
  37 ;;;###autoload
  38 (defun url-info (url)
  39   "Fetch a GNU Info URL."
  40   ;; Fetch an info node
  41   (let* ((fname (url-filename url))
  42          (node (url-unhex-string (or (url-target url) "Top"))))
  43     (if (and fname node)
  44         (Info-goto-node (concat "(" fname ")" node))
  45       (error "Malformed url: %s" (url-recreate-url url)))
  46     nil))
  47
  48 (defun url-do-terminal-emulator (type server port user)
  49   (terminal-emulator
  50    (generate-new-buffer (format "%s%s" (if user (concat user "@") "") server))
  51    (case type
  52      (rlogin "rlogin")
  53      (telnet "telnet")
  54      (tn3270 "tn3270")
  55      (otherwise
  56       (error "Unknown terminal emulator required: %s" type)))
  57    (case type
  58      (rlogin
  59       (if user
  60           (list server "-l" user)
  61         (list server)))
  62      (telnet
  63       (if user (message "Please log in as user: %s" user))
  64       (if port
  65           (list server port)
  66         (list server)))
  67      (tn3270
  68       (if user (message "Please log in as user: %s" user))
  69       (list server)))))
  70
  71 ;;;###autoload
  72 (defun url-generic-emulator-loader (url)
  73   (let* ((type (intern (downcase (url-type url))))
  74          (server (url-host url))
  75          (name (url-user url))
  76          (port (number-to-string (url-port url))))
  77     (url-do-terminal-emulator type server port name))
  78   nil)
  79
  80 ;;;###autoload
  81 (defalias 'url-rlogin 'url-generic-emulator-loader)
  82 ;;;###autoload
  83 (defalias 'url-telnet 'url-generic-emulator-loader)
  84 ;;;###autoload
  85 (defalias 'url-tn3270 'url-generic-emulator-loader)
  86
  87 ;; RFC 2397
  88 ;;;###autoload
  89 (defun url-data (url)
  90   "Fetch a data URL (RFC 2397)."
  91   (let ((mediatype nil)
  92         ;; The mediatype may need to be hex-encoded too -- see the RFC.
  93         (desc (url-unhex-string (url-filename url)))
  94         (encoding "8bit")
  95         (data nil))
  96     (save-excursion
  97       (if (not (string-match "\\([^,]*\\)?," desc))
  98           (error "Malformed data URL: %s" desc)
  99         (setq mediatype (match-string 1 desc))
 100         (if (and mediatype (string-match ";base64\\'" mediatype))
 101             (setq mediatype (substring mediatype 0 (match-beginning 0))
 102                   encoding "base64"))
 103         (if (or (null mediatype)
 104                 (eq ?\; (aref mediatype 0)))
 105           (setq mediatype (concat "text/plain" mediatype)))
 106         (setq data (url-unhex-string (substring desc (match-end 0)))))
 107       (set-buffer (generate-new-buffer " *url-data*"))
 108       (mm-disable-multibyte)
 109       (insert (format "Content-Length: %d\n" (length data))
 110               "Content-Type: " mediatype "\n"
 111               "Content-Encoding: " encoding "\n"
 112               "\n")
 113       (if data (insert data))
 114       (current-buffer))))
 115
 116 (provide 'url-misc)
 117
 118 ;;; url-misc.el ends here