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) 1996-1999, 2002, 2004-2013 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 of the License, or
  12 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 ;;; Code:
  23
  24 (require 'url-vars)
  25 (require 'url-parse)
  26 (autoload 'Info-goto-node "info" "" t)
  27 (autoload 'man "man" nil t)
  28
  29 ;;;###autoload
  30 (defun url-man (url)
  31   "Fetch a Unix manual page URL."
  32   (man (url-filename url))
  33   nil)
  34
  35 ;;;###autoload
  36 (defun url-info (url)
  37   "Fetch a GNU Info URL."
  38   ;; Fetch an info node
  39   (let* ((fname (url-filename url))
  40          (node (url-unhex-string (or (url-target url) "Top"))))
  41     (if (and fname node)
  42         (Info-goto-node (concat "(" fname ")" node))
  43       (error "Malformed url: %s" (url-recreate-url url)))
  44     nil))
  45
  46 (defun url-do-terminal-emulator (type server port user)
  47   (switch-to-buffer
  48    (apply
  49     'make-term
  50     (format "%s%s" (if user (concat user "@") "") server)
  51     (cond ((eq type 'rlogin) "rlogin")
  52           ((eq type 'telnet) "telnet")
  53           ((eq type 'tn3270) "tn3270")
  54           (t (error "Unknown terminal emulator required: %s" type)))
  55     nil
  56     (cond ((eq type 'rlogin)
  57            (if user (list server "-l" user) (list server)))
  58           ((eq type 'telnet)
  59            (if port (list server port) (list server)))
  60           ((eq type 'tn3270)
  61            (list server))))))
  62
  63 ;;;###autoload
  64 (defun url-generic-emulator-loader (url)
  65   (let* ((type (intern (downcase (url-type url))))
  66          (server (url-host url))
  67          (name (url-user url))
  68          (port (number-to-string (url-port url))))
  69     (url-do-terminal-emulator type server port name))
  70   nil)
  71
  72 ;;;###autoload
  73 (defalias 'url-rlogin 'url-generic-emulator-loader)
  74 ;;;###autoload
  75 (defalias 'url-telnet 'url-generic-emulator-loader)
  76 ;;;###autoload
  77 (defalias 'url-tn3270 'url-generic-emulator-loader)
  78
  79 ;; RFC 2397
  80 ;;;###autoload
  81 (defun url-data (url)
  82   "Fetch a data URL (RFC 2397)."
  83   (let ((mediatype nil)
  84         ;; The mediatype may need to be hex-encoded too -- see the RFC.
  85         (desc (url-unhex-string (url-filename url)))
  86         (encoding "8bit")
  87         (data nil))
  88     (save-excursion
  89       (if (not (string-match "\\([^,]*\\)?," desc))
  90           (error "Malformed data URL: %s" desc)
  91         (setq mediatype (match-string 1 desc)
  92               data (url-unhex-string (substring desc (match-end 0))))
  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       (set-buffer (generate-new-buffer " *url-data*"))
 100       (mm-disable-multibyte)
 101       (insert (format "Content-Length: %d\n" (length data))
 102               "Content-Type: " mediatype "\n"
 103               "Content-Transfer-Encoding: " encoding "\n"
 104               "\n")
 105       (if data (insert data))
 106       (current-buffer))))
 107
 108 (provide 'url-misc)
 109
 110 ;;; url-misc.el ends here