;;; url-about.el --- Show internal URLs ;; Copyright (C) 2001, 2004-2020 Free Software Foundation, Inc. ;; Keywords: comm, data, processes, hypermedia ;; This file is part of GNU Emacs. ;; ;; GNU Emacs is free software: you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs. If not, see . ;;; Commentary: ;;; Code: (require 'url-util) (require 'url-parse) (defun url-probe-protocols () "Return a list of all potential URL schemes." (or (get 'url-extension-protocols 'probed) (mapc (lambda (s) (url-scheme-get-property s 'name)) (or (get 'url-extension-protocols 'schemes) (let ((schemes '("info" "man" "rlogin" "telnet" "tn3270" "data" "snews"))) (mapc (lambda (d) (mapc (lambda (f) (if (string-match "url-\$.*\$.el$" f) (push (match-string 1 f) schemes))) (directory-files d nil "^url-.*\\.el$"))) load-path) (put 'url-extension-protocols 'schemes schemes) schemes))))) (defvar url-scheme-registry) (defun url-about-protocols (url) (url-probe-protocols) (insert "\n" " \n" " Supported Protocols\n" " \n" " \n" "

Supported Protocols - URL v" url-version "

\n" " \n" " \n" " \n") (mapc (lambda (k) (if (string= k "proxy") ;; Ignore the proxy setting... its magic! nil (insert " \n") ;; The name of the protocol (insert "

Protocol\n" "	Properties\n" "	Description\n" "
" (or (url-scheme-get-property k 'name) k) "\n") ;; Now the properties. Currently just asynchronous ;; status, default port number, and proxy status. (insert "	" (if (url-scheme-get-property k 'asynchronous-p) "As" "S") "ynchronous \n" (if (url-scheme-get-property k 'default-port) (format "Default Port: %d \n" (url-scheme-get-property k 'default-port)) "") (if (assoc k url-proxy-services) (format "Proxy: %s \n" (assoc k url-proxy-services)) "")) ;; Now the description... (insert "	" (or (url-scheme-get-property k 'description) "N/A")))) (sort (let (x) (maphash (lambda (k v) (push k x)) url-scheme-registry) x) 'string-lessp)) (insert "

\n" " \n" "\n")) (defun url-about (url) "Show internal URLs." (let* ((item (downcase (url-filename url))) (func (intern (format "url-about-%s" item)))) (if (fboundp func) (progn (set-buffer (generate-new-buffer " *about-data*")) (insert "Content-type: text/plain\n\n") (funcall func url) (current-buffer)) (error "URL does not know about `%s'" item)))) (provide 'url-about) ;;; url-about.el ends here