| 1 | ;;; url-domsuf.el --- Say what domain names can have cookies set. |
| 2 | |
| 3 | ;; Copyright (C) 2012-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> |
| 6 | |
| 7 | ;; Keywords: comm, data, processes, hypermedia |
| 8 | |
| 9 | ;; This file is part of GNU Emacs. |
| 10 | ;; |
| 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 12 | ;; it under the terms of the GNU General Public License as published by |
| 13 | ;; the Free Software Foundation, either version 3 of the License, or |
| 14 | ;; (at your option) any later version. |
| 15 | |
| 16 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | ;; GNU General Public License for more details. |
| 20 | |
| 21 | ;; You should have received a copy of the GNU General Public License |
| 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 23 | |
| 24 | ;;; Commentary: |
| 25 | |
| 26 | ;; The rules for what domains can have cookies set is defined here: |
| 27 | ;; http://publicsuffix.org/list/ |
| 28 | |
| 29 | ;;; Code: |
| 30 | |
| 31 | (defvar url-domsuf-domains nil) |
| 32 | |
| 33 | (defun url-domsuf-parse-file () |
| 34 | (with-temp-buffer |
| 35 | (insert-file-contents |
| 36 | (expand-file-name "publicsuffix.txt" data-directory)) |
| 37 | (let ((domains nil) |
| 38 | domain exception) |
| 39 | (while (not (eobp)) |
| 40 | (when (not (looking-at "[/\n\t ]")) |
| 41 | ;; !pref.aichi.jp means that it's allowed. |
| 42 | (if (not (eq (following-char) ?!)) |
| 43 | (setq exception nil) |
| 44 | (setq exception t) |
| 45 | (forward-char 1)) |
| 46 | (setq domain (buffer-substring (point) (line-end-position))) |
| 47 | (cond |
| 48 | ((string-match "\\`\\*\\." domain) |
| 49 | (setq domain (substring domain 2)) |
| 50 | (push (cons domain (1+ (length (split-string domain "[.]")))) |
| 51 | domains)) |
| 52 | (exception |
| 53 | (push (cons domain t) domains)) |
| 54 | (t |
| 55 | (push (cons domain nil) domains)))) |
| 56 | (forward-line 1)) |
| 57 | (setq url-domsuf-domains (nreverse domains))))) |
| 58 | |
| 59 | (defun url-domsuf-cookie-allowed-p (domain) |
| 60 | (unless url-domsuf-domains |
| 61 | (url-domsuf-parse-file)) |
| 62 | (let* ((allowedp t) |
| 63 | (domain-bits (split-string domain "[.]")) |
| 64 | (length (length domain-bits)) |
| 65 | (upper-domain (mapconcat 'identity (cdr domain-bits) ".")) |
| 66 | entry modifier) |
| 67 | (dolist (elem url-domsuf-domains) |
| 68 | (setq entry (car elem) |
| 69 | modifier (cdr elem)) |
| 70 | (cond |
| 71 | ;; "com" |
| 72 | ((and (null modifier) |
| 73 | (string= domain entry)) |
| 74 | (setq allowedp nil)) |
| 75 | ;; "!pref.hokkaido.jp" |
| 76 | ((and (eq modifier t) |
| 77 | (string= domain entry)) |
| 78 | (setq allowedp t)) |
| 79 | ;; "*.ar" |
| 80 | ((and (numberp modifier) |
| 81 | (= length modifier) |
| 82 | (string= entry upper-domain)) |
| 83 | (setq allowedp nil)))) |
| 84 | allowedp)) |
| 85 | |
| 86 | ;; Tests: |
| 87 | |
| 88 | ;; (url-domsuf-cookie-allowed-p "com") => nil |
| 89 | ;; (url-domsuf-cookie-allowed-p "foo.bar.ar") => t |
| 90 | ;; (url-domsuf-cookie-allowed-p "bar.ar") => nil |
| 91 | ;; (url-domsuf-cookie-allowed-p "co.uk") => nil |
| 92 | ;; (url-domsuf-cookie-allowed-p "foo.bar.hokkaido.jo") => t |
| 93 | ;; (url-domsuf-cookie-allowed-p "bar.hokkaido.jp") => nil |
| 94 | ;; (url-domsuf-cookie-allowed-p "pref.hokkaido.jp") => t |
| 95 | |
| 96 | (provide 'url-domsuf) |
| 97 | |
| 98 | ;;; url-domsuf.el ends here |