105 lines
3.4 KiB
EmacsLisp
105 lines
3.4 KiB
EmacsLisp
;;; url-about.el --- Show internal URLs -*- lexical-binding: t; -*-
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;; Copyright (C) 2001-2024 Free Software Foundation, Inc.
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;; Keywords: comm, data, processes, hypermedia
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;; Obsolete-since: 29.1
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'url-util)
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(require 'url-parse)
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(defun url-probe-protocols ()
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"Return a list of all potential URL schemes."
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(or (get 'url-extension-protocols 'probed)
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(mapc (lambda (s) (url-scheme-get-property s 'name))
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(or (get 'url-extension-protocols 'schemes)
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(let ((schemes '("info" "man" "telnet"
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"tn3270" "data" "snews")))
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(mapc (lambda (d)
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(mapc (lambda (f)
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(if (string-match "url-\\(.*\\).el$" f)
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(push (match-string 1 f) schemes)))
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(directory-files d nil "\\`url-.*\\.el\\'")))
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(seq-filter #'file-exists-p load-path))
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(put 'url-extension-protocols 'schemes schemes)
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schemes)))))
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(defvar url-scheme-registry)
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(defun url-about-protocols (_url)
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(url-probe-protocols)
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(insert "<html>\n"
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" <head>\n"
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" <title>Supported Protocols</title>\n"
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" </head>\n"
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" <body>\n"
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" <h1>Supported Protocols - URL package in Emacs " emacs-version "</h1>\n"
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" <table width='100%' border='1'>\n"
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" <tr>\n"
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" <td>Protocol\n"
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" <td>Properties\n"
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" <td>Description\n"
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" </tr>\n")
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(mapc (lambda (k)
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(if (string= k "proxy")
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;; Ignore the proxy setting... its magic!
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nil
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(insert " <tr>\n")
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;; The name of the protocol
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(insert " <td valign=top>" (or (url-scheme-get-property k 'name) k) "\n")
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;; Now the properties. Currently just asynchronous
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;; status, default port number, and proxy status.
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(insert " <td valign=top>"
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(if (url-scheme-get-property k 'asynchronous-p) "As" "S")
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"ynchronous<br>\n"
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(if (url-scheme-get-property k 'default-port)
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(format "Default Port: %d<br>\n"
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(url-scheme-get-property k 'default-port))
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"")
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(if (assoc k url-proxy-services)
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(format "Proxy: %s<br>\n" (assoc k url-proxy-services)) ""))
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;; Now the description...
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(insert " <td valign=top>"
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(or (url-scheme-get-property k 'description) "N/A"))))
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(sort (let (x) (maphash (lambda (k _v) (push k x)) url-scheme-registry) x)
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#'string-lessp))
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(insert " </table>\n"
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" </body>\n"
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"</html>\n"))
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(defun url-about (url)
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"Show internal URLs."
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(let* ((item (downcase (url-filename url)))
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(func (intern (format "url-about-%s" item))))
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(if (fboundp func)
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(progn
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(set-buffer (generate-new-buffer " *about-data*"))
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(insert "Content-type: text/plain\n\n")
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(funcall func url)
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(current-buffer))
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(error "URL does not know about `%s'" item))))
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(provide 'url-about)
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;;; url-about.el ends here
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