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-rw-r--r--background/cookie_filter.js80
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diff --git a/background/cookie_filter.js b/background/cookie_filter.js
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--- a/background/cookie_filter.js
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-/**
- * This file is part of Haketilo.
- *
- * Function: Filtering request headers to remove haketilo cookies that might
- * have slipped through.
- *
- * Copyright (C) 2021 Wojtek Kosior
- *
- * This program 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.
- *
- * This program 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.
- *
- * As additional permission under GNU GPL version 3 section 7, you
- * may distribute forms of that code without the copy of the GNU
- * GPL normally required by section 4, provided you include this
- * license notice and, in case of non-source distribution, a URL
- * through which recipients can access the Corresponding Source.
- * If you modify file(s) with this exception, you may extend this
- * exception to your version of the file(s), but you are not
- * obligated to do so. If you do not wish to do so, delete this
- * exception statement from your version.
- *
- * As a special exception to the GPL, any HTML file which merely
- * makes function calls to this code, and for that purpose
- * includes it by reference shall be deemed a separate work for
- * copyright law purposes. If you modify this code, you may extend
- * this exception to your version of the code, but you are not
- * obligated to do so. If you do not wish to do so, delete this
- * exception statement from your version.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- * I, Wojtek Kosior, thereby promise not to sue for violation of this file's
- * license. Although I request that you do not make use this code in a
- * proprietary program, I am not going to enforce this in court.
- */
-
-/*
- * IMPORTS_START
- * IMPORT extract_signed
- * IMPORTS_END
- */
-
-function is_valid_haketilo_cookie(cookie)
-{
- const match = /^haketilo-(\w*)=(.*)$/.exec(cookie);
- if (!match)
- return false;
-
- return !extract_signed(match.slice(1, 3)).fail;
-}
-
-function remove_haketilo_cookies(header)
-{
- if (header.name !== "Cookie")
- return header;
-
- const cookies = header.value.split("; ");
- const value = cookies.filter(c => !is_valid_haketilo_cookie(c)).join("; ");
-
- return value ? {name: "Cookie", value} : null;
-}
-
-function filter_cookie_headers(headers)
-{
- return headers.map(remove_haketilo_cookies).filter(h => h);
-}
-
-/*
- * EXPORTS_START
- * EXPORT filter_cookie_headers
- * EXPORTS_END
- */