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104 lines
3.2 KiB
EmacsLisp
104 lines
3.2 KiB
EmacsLisp
;;; url-domsuf.el --- Say what domain names can have cookies set.
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;; Copyright (C) 2012-2019 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: comm, data, processes, hypermedia
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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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;; The rules for what domains can have cookies set is defined here:
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;; http://publicsuffix.org/list/
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;;; Code:
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(defvar url-domsuf-domains nil)
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(defun url-domsuf-parse-file ()
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(with-temp-buffer
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(with-auto-compression-mode
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(insert-file-contents
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(let* ((suffixfile (expand-file-name "publicsuffix.txt" data-directory))
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(compressed-file (concat suffixfile ".gz")))
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(or (and (file-readable-p compressed-file) compressed-file)
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suffixfile))))
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(let ((domains nil)
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domain exception)
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(while (not (eobp))
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(when (not (looking-at "[/\n\t ]"))
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;; !pref.aichi.jp means that it's allowed.
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(if (not (eq (following-char) ?!))
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(setq exception nil)
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(setq exception t)
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(forward-char 1))
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(setq domain (buffer-substring (point) (line-end-position)))
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(cond
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((string-match "\\`\\*\\." domain)
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(setq domain (substring domain 2))
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(push (cons domain (1+ (length (split-string domain "[.]"))))
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domains))
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(exception
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(push (cons domain t) domains))
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(t
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(push (cons domain nil) domains))))
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(forward-line 1))
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(setq url-domsuf-domains (nreverse domains)))))
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(defun url-domsuf-cookie-allowed-p (domain)
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(unless url-domsuf-domains
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(url-domsuf-parse-file))
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(let* ((allowedp t)
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(domain-bits (split-string domain "[.]"))
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(length (length domain-bits))
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(upper-domain (mapconcat 'identity (cdr domain-bits) "."))
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entry modifier)
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(dolist (elem url-domsuf-domains)
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(setq entry (car elem)
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modifier (cdr elem))
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(cond
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;; "com"
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((and (null modifier)
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(string= domain entry))
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(setq allowedp nil))
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;; "!city.yokohama.jp"
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((and (eq modifier t)
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(string= domain entry))
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(setq allowedp t))
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;; "*.bd"
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((and (numberp modifier)
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(= length modifier)
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(string= entry upper-domain))
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(setq allowedp nil))))
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allowedp))
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;; Tests:
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;; TODO convert to a proper test.
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;; (url-domsuf-cookie-allowed-p "com") => nil
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;; (url-domsuf-cookie-allowed-p "foo.bar.bd") => t
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;; (url-domsuf-cookie-allowed-p "bar.bd") => nil
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;; (url-domsuf-cookie-allowed-p "co.uk") => nil
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;; (url-domsuf-cookie-allowed-p "foo.bar.hokkaido.jo") => t
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;; (url-domsuf-cookie-allowed-p "bar.yokohama.jp") => nil
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;; (url-domsuf-cookie-allowed-p "city.yokohama.jp") => t
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(provide 'url-domsuf)
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;;; url-domsuf.el ends here
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