1;;; url-about.el --- Show internal URLs 2 3;; Copyright (C) 2001, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 4 5;; Keywords: comm, data, processes, hypermedia 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 2, or (at your option) 12;; 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; see the file COPYING. If not, write to the 21;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22;; Boston, MA 02110-1301, USA. 23 24;;; Commentary: 25 26;;; Code: 27 28(eval-when-compile 29 (require 'cl)) 30(require 'url-util) 31(require 'url-parse) 32 33(defun url-probe-protocols () 34 "Return a list of all potential URL schemes." 35 (or (get 'url-extension-protocols 'probed) 36 (mapc (lambda (s) (url-scheme-get-property s 'name)) 37 (or (get 'url-extension-protocols 'schemes) 38 (let ((schemes '("info" "man" "rlogin" "telnet" 39 "tn3270" "data" "snews"))) 40 (mapc (lambda (d) 41 (mapc (lambda (f) 42 (if (string-match "url-\\(.*\\).el$" f) 43 (push (match-string 1 f) schemes))) 44 (directory-files d nil "^url-.*\\.el$"))) 45 load-path) 46 (put 'url-extension-protocols 'schemes schemes) 47 schemes))))) 48 49(defvar url-scheme-registry) 50 51(defun url-about-protocols (url) 52 (url-probe-protocols) 53 (insert "<html>\n" 54 " <head>\n" 55 " <title>Supported Protocols</title>\n" 56 " </head>\n" 57 " <body>\n" 58 " <h1>Supported Protocols - URL v" url-version "</h1>\n" 59 " <table width='100%' border='1'>\n" 60 " <tr>\n" 61 " <td>Protocol\n" 62 " <td>Properties\n" 63 " <td>Description\n" 64 " </tr>\n") 65 (mapc (lambda (k) 66 (if (string= k "proxy") 67 ;; Ignore the proxy setting... its magic! 68 nil 69 (insert " <tr>\n") 70 ;; The name of the protocol 71 (insert " <td valign=top>" (or (url-scheme-get-property k 'name) k) "\n") 72 73 ;; Now the properties. Currently just asynchronous 74 ;; status, default port number, and proxy status. 75 (insert " <td valign=top>" 76 (if (url-scheme-get-property k 'asynchronous-p) "As" "S") 77 "ynchronous<br>\n" 78 (if (url-scheme-get-property k 'default-port) 79 (format "Default Port: %d<br>\n" 80 (url-scheme-get-property k 'default-port)) "") 81 (if (assoc k url-proxy-services) 82 (format "Proxy: %s<br>\n" (assoc k url-proxy-services)) "")) 83 ;; Now the description... 84 (insert " <td valign=top>" 85 (or (url-scheme-get-property k 'description) "N/A")))) 86 (sort (let (x) (maphash (lambda (k v) (push k x)) url-scheme-registry) x) 'string-lessp)) 87 (insert " </table>\n" 88 " </body>\n" 89 "</html>\n")) 90 91(defun url-about (url) 92 "Show internal URLs." 93 (let* ((item (downcase (url-filename url))) 94 (func (intern (format "url-about-%s" item)))) 95 (if (fboundp func) 96 (progn 97 (set-buffer (generate-new-buffer " *about-data*")) 98 (insert "Content-type: text/plain\n\n") 99 (funcall func url) 100 (current-buffer)) 101 (error "URL does not know about `%s'" item)))) 102 103(provide 'url-about) 104 105;; arch-tag: 65dd7fca-db3f-4cb1-8026-7dd37d4a460e 106;;; url-about.el ends here 107