lisp/url/url-misc.el

   1 ;;; url-misc.el --- Misc Uniform Resource Locator retrieval code
   2
   3 ;; Copyright (C) 1996-1999, 2002, 2004-2013 Free Software Foundation,
   4 ;; 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 (require 'url-vars)
  26 (require 'url-parse)
  27 (autoload 'Info-goto-node "info" "" t)
  28 (autoload 'man "man" nil t)
  29
  30 ;;;###autoload
  31 (defun url-man (url)
  32   "Fetch a Unix manual page URL."
  33   (man (url-filename url))
  34   nil)
  35
  36 ;;;###autoload
  37 (defun url-info (url)
  38   "Fetch a GNU Info URL."
  39   ;; Fetch an info node
  40   (let* ((fname (url-filename url))
  41          (node (url-unhex-string (or (url-target url) "Top"))))
  42     (if (and fname node)
  43         (Info-goto-node (concat "(" fname ")" node))
  44       (error "Malformed url: %s" (url-recreate-url url)))
  45     nil))
  46
  47 (defun url-do-terminal-emulator (type server port user)
  48   (switch-to-buffer
  49    (apply
  50     'make-term
  51     (format "%s%s" (if user (concat user "@") "") server)
  52     (cond ((eq type 'rlogin) "rlogin")
  53           ((eq type 'telnet) "telnet")
  54           ((eq type 'tn3270) "tn3270")
  55           (t (error "Unknown terminal emulator required: %s" type)))
  56     nil
  57     (cond ((eq type 'rlogin)
  58            (if user (list server "-l" user) (list server)))
  59           ((eq type 'telnet)
  60            (if port (list server port) (list server)))
  61           ((eq type 'tn3270)
  62            (list server))))))
  63
  64 ;;;###autoload
  65 (defun url-generic-emulator-loader (url)
  66   (let* ((type (intern (downcase (url-type url))))
  67          (server (url-host url))
  68          (name (url-user url))
  69          (port (number-to-string (url-port url))))
  70     (url-do-terminal-emulator type server port name))
  71   nil)
  72
  73 ;;;###autoload
  74 (defalias 'url-rlogin 'url-generic-emulator-loader)
  75 ;;;###autoload
  76 (defalias 'url-telnet 'url-generic-emulator-loader)
  77 ;;;###autoload
  78 (defalias 'url-tn3270 'url-generic-emulator-loader)
  79
  80 ;; RFC 2397
  81 ;;;###autoload
  82 (defun url-data (url)
  83   "Fetch a data URL (RFC 2397)."
  84   (let ((mediatype nil)
  85         ;; The mediatype may need to be hex-encoded too -- see the RFC.
  86         (desc (url-unhex-string (url-filename url)))
  87         (encoding "8bit")
  88         (data nil))
  89     (save-excursion
  90       (if (not (string-match "\\([^,]*\\)?," desc))
  91           (error "Malformed data URL: %s" desc)
  92         (setq mediatype (match-string 1 desc))
  93         (if (and mediatype (string-match ";base64\\'" mediatype))
  94             (setq mediatype (substring mediatype 0 (match-beginning 0))
  95                   encoding "base64"))
  96         (if (or (null mediatype)
  97                 (eq ?\; (aref mediatype 0)))
  98           (setq mediatype (concat "text/plain" mediatype)))
  99         (setq data (url-unhex-string (substring desc (match-end 0)))))
 100       (set-buffer (generate-new-buffer " *url-data*"))
 101       (mm-disable-multibyte)
 102       (insert (format "Content-Length: %d\n" (length data))
 103               "Content-Type: " mediatype "\n"
 104               "Content-Encoding: " encoding "\n"
 105               "\n")
 106       (if data (insert data))
 107       (current-buffer))))
 108
 109 (provide 'url-misc)
 110
 111 ;;; url-misc.el ends here