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8c8b8430 | 1 | ;;; url-about.el --- Show internal URLs |
d3c91027 | 2 | |
acaf905b | 3 | ;; Copyright (C) 2001, 2004-2012 Free Software Foundation, Inc. |
d3c91027 | 4 | |
8c8b8430 SM |
5 | ;; Keywords: comm, data, processes, hypermedia |
6 | ||
d3c91027 SM |
7 | ;; This file is part of GNU Emacs. |
8 | ;; | |
4936186e | 9 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
d3c91027 | 10 | ;; it under the terms of the GNU General Public License as published by |
4936186e GM |
11 | ;; the Free Software Foundation, either version 3 of the License, or |
12 | ;; (at your option) any later version. | |
13 | ||
d3c91027 SM |
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. | |
4936186e | 18 | |
d3c91027 | 19 | ;; You should have received a copy of the GNU General Public License |
4936186e | 20 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
d3c91027 SM |
21 | |
22 | ;;; Commentary: | |
23 | ||
24 | ;;; Code: | |
25 | ||
8c8b8430 SM |
26 | (require 'url-util) |
27 | (require 'url-parse) | |
28 | ||
29 | (defun url-probe-protocols () | |
d3c91027 | 30 | "Return a list of all potential URL schemes." |
8c8b8430 SM |
31 | (or (get 'url-extension-protocols 'probed) |
32 | (mapc (lambda (s) (url-scheme-get-property s 'name)) | |
33 | (or (get 'url-extension-protocols 'schemes) | |
34 | (let ((schemes '("info" "man" "rlogin" "telnet" | |
35 | "tn3270" "data" "snews"))) | |
36 | (mapc (lambda (d) | |
37 | (mapc (lambda (f) | |
38 | (if (string-match "url-\\(.*\\).el$" f) | |
39 | (push (match-string 1 f) schemes))) | |
40 | (directory-files d nil "^url-.*\\.el$"))) | |
41 | load-path) | |
42 | (put 'url-extension-protocols 'schemes schemes) | |
43 | schemes))))) | |
44 | ||
d3c91027 SM |
45 | (defvar url-scheme-registry) |
46 | ||
8c8b8430 SM |
47 | (defun url-about-protocols (url) |
48 | (url-probe-protocols) | |
49 | (insert "<html>\n" | |
50 | " <head>\n" | |
51 | " <title>Supported Protocols</title>\n" | |
52 | " </head>\n" | |
53 | " <body>\n" | |
54 | " <h1>Supported Protocols - URL v" url-version "</h1>\n" | |
55 | " <table width='100%' border='1'>\n" | |
56 | " <tr>\n" | |
57 | " <td>Protocol\n" | |
58 | " <td>Properties\n" | |
59 | " <td>Description\n" | |
60 | " </tr>\n") | |
61 | (mapc (lambda (k) | |
62 | (if (string= k "proxy") | |
63 | ;; Ignore the proxy setting... its magic! | |
64 | nil | |
65 | (insert " <tr>\n") | |
66 | ;; The name of the protocol | |
67 | (insert " <td valign=top>" (or (url-scheme-get-property k 'name) k) "\n") | |
68 | ||
69 | ;; Now the properties. Currently just asynchronous | |
70 | ;; status, default port number, and proxy status. | |
71 | (insert " <td valign=top>" | |
72 | (if (url-scheme-get-property k 'asynchronous-p) "As" "S") | |
73 | "ynchronous<br>\n" | |
74 | (if (url-scheme-get-property k 'default-port) | |
75 | (format "Default Port: %d<br>\n" | |
76 | (url-scheme-get-property k 'default-port)) "") | |
77 | (if (assoc k url-proxy-services) | |
78 | (format "Proxy: %s<br>\n" (assoc k url-proxy-services)) "")) | |
79 | ;; Now the description... | |
80 | (insert " <td valign=top>" | |
81 | (or (url-scheme-get-property k 'description) "N/A")))) | |
82 | (sort (let (x) (maphash (lambda (k v) (push k x)) url-scheme-registry) x) 'string-lessp)) | |
83 | (insert " </table>\n" | |
84 | " </body>\n" | |
85 | "</html>\n")) | |
86 | ||
87 | (defun url-about (url) | |
88 | "Show internal URLs." | |
89 | (let* ((item (downcase (url-filename url))) | |
90 | (func (intern (format "url-about-%s" item)))) | |
91 | (if (fboundp func) | |
92 | (progn | |
93 | (set-buffer (generate-new-buffer " *about-data*")) | |
d3c91027 | 94 | (insert "Content-type: text/plain\n\n") |
8c8b8430 SM |
95 | (funcall func url) |
96 | (current-buffer)) | |
97 | (error "URL does not know about `%s'" item)))) | |
98 | ||
99 | (provide 'url-about) | |
e5566bd5 | 100 | |
d3c91027 | 101 | ;;; url-about.el ends here |