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- ;;; url-about.el --- Show internal URLs
- ;; Copyright (C) 2001, 2004-2012 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 <http://www.gnu.org/licenses/>.
- ;;; 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 "<html>\n"
- " <head>\n"
- " <title>Supported Protocols</title>\n"
- " </head>\n"
- " <body>\n"
- " <h1>Supported Protocols - URL v" url-version "</h1>\n"
- " <table width='100%' border='1'>\n"
- " <tr>\n"
- " <td>Protocol\n"
- " <td>Properties\n"
- " <td>Description\n"
- " </tr>\n")
- (mapc (lambda (k)
- (if (string= k "proxy")
- ;; Ignore the proxy setting... its magic!
- nil
- (insert " <tr>\n")
- ;; The name of the protocol
- (insert " <td valign=top>" (or (url-scheme-get-property k 'name) k) "\n")
- ;; Now the properties. Currently just asynchronous
- ;; status, default port number, and proxy status.
- (insert " <td valign=top>"
- (if (url-scheme-get-property k 'asynchronous-p) "As" "S")
- "ynchronous<br>\n"
- (if (url-scheme-get-property k 'default-port)
- (format "Default Port: %d<br>\n"
- (url-scheme-get-property k 'default-port)) "")
- (if (assoc k url-proxy-services)
- (format "Proxy: %s<br>\n" (assoc k url-proxy-services)) ""))
- ;; Now the description...
- (insert " <td valign=top>"
- (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 " </table>\n"
- " </body>\n"
- "</html>\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
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