root/trunk/lisp/url/url-about.el

Revision 4220, 3.4 kB (checked in by miyoshi, 9 months ago)

Sync up with Emacs22.2.

Line 
1 ;;; url-about.el --- Show internal URLs
2
3 ;; Copyright (C) 2001, 2004, 2005, 2006, 2007, 2008
4 ;;   Free Software Foundation, Inc.
5
6 ;; Keywords: comm, data, processes, hypermedia
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, or (at your option)
13 ;; 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; see the file COPYING.  If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
24
25 ;;; Commentary:
26
27 ;;; Code:
28
29 (eval-when-compile
30   (require 'cl))
31 (require 'url-util)
32 (require 'url-parse)
33
34 (defun url-probe-protocols ()
35   "Return a list of all potential URL schemes."
36   (or (get 'url-extension-protocols 'probed)
37       (mapc (lambda (s) (url-scheme-get-property s 'name))
38             (or (get 'url-extension-protocols 'schemes)
39                 (let ((schemes '("info" "man" "rlogin" "telnet"
40                                  "tn3270" "data" "snews")))
41                   (mapc (lambda (d)
42                           (mapc (lambda (f)
43                                   (if (string-match "url-\\(.*\\).el$" f)
44                                       (push (match-string 1 f) schemes)))
45                                 (directory-files d nil "^url-.*\\.el$")))
46                         load-path)
47                   (put 'url-extension-protocols 'schemes schemes)
48                   schemes)))))
49
50 (defvar url-scheme-registry)
51
52 (defun url-about-protocols (url)
53   (url-probe-protocols)
54   (insert "<html>\n"
55           " <head>\n"
56           "  <title>Supported Protocols</title>\n"
57           " </head>\n"
58           " <body>\n"
59           "  <h1>Supported Protocols - URL v" url-version "</h1>\n"
60           "  <table width='100%' border='1'>\n"
61           "   <tr>\n"
62           "    <td>Protocol\n"
63           "    <td>Properties\n"
64           "    <td>Description\n"
65           "   </tr>\n")
66   (mapc (lambda (k)
67           (if (string= k "proxy")
68               ;; Ignore the proxy setting... its magic!
69               nil
70             (insert "   <tr>\n")
71             ;; The name of the protocol
72             (insert "    <td valign=top>" (or (url-scheme-get-property k 'name) k) "\n")
73
74             ;; Now the properties.  Currently just asynchronous
75             ;; status, default port number, and proxy status.
76             (insert "    <td valign=top>"
77                     (if (url-scheme-get-property k 'asynchronous-p) "As" "S")
78                     "ynchronous<br>\n"
79                     (if (url-scheme-get-property k 'default-port)
80                         (format "Default Port: %d<br>\n"
81                                 (url-scheme-get-property k 'default-port)) "")
82                     (if (assoc k url-proxy-services)
83                         (format "Proxy: %s<br>\n" (assoc k url-proxy-services)) ""))
84             ;; Now the description...
85             (insert "    <td valign=top>"
86                     (or (url-scheme-get-property k 'description) "N/A"))))
87         (sort (let (x) (maphash (lambda (k v) (push k x)) url-scheme-registry) x) 'string-lessp))
88   (insert "  </table>\n"
89           " </body>\n"
90           "</html>\n"))
91
92 (defun url-about (url)
93   "Show internal URLs."
94   (let* ((item (downcase (url-filename url)))
95          (func (intern (format "url-about-%s" item))))
96     (if (fboundp func)
97         (progn
98           (set-buffer (generate-new-buffer " *about-data*"))
99           (insert "Content-type: text/plain\n\n")
100           (funcall func url)
101           (current-buffer))
102       (error "URL does not know about `%s'" item))))
103
104 (provide 'url-about)
105
106 ;; arch-tag: 65dd7fca-db3f-4cb1-8026-7dd37d4a460e
107 ;;; url-about.el ends here
108
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