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/**
* Hachette main content script run in all frames
*
* Copyright (C) 2021 Wojtek Kosior
* Copyright (C) 2021 jahoti
* Redistribution terms are gathered in the `copyright' file.
*/
/*
* IMPORTS_START
* IMPORT handle_page_actions
* IMPORT extract_signed
* IMPORT gen_nonce
* IMPORT is_privileged_url
* IMPORT mozilla_suppress_scripts
* IMPORT is_chrome
* IMPORT is_mozilla
* IMPORT start_activity_info_server
* IMPORT modify_on_the_fly
* IMPORTS_END
*/
function accept_node(node, parent)
{
const clone = document.importNode(node, false);
node.hachette_corresponding = clone;
/*
* TODO: Stop page's own issues like "Error parsing a meta element's
* content:" from appearing as extension's errors.
*/
parent.hachette_corresponding.appendChild(clone);
}
if (!is_privileged_url(document.URL)) {
/* Signature valid for half an hour. */
const min_time = new Date().getTime() - 1800 * 1000;
let best_result = {time: -1};
let policy = null;
const extracted_signatures = [];
for (const match of document.cookie.matchAll(/hachette-(\w*)=([^;]*)/g)) {
const new_result = extract_signed(...match.slice(1, 3));
if (new_result.fail)
continue;
extracted_signatures.push(match[1]);
if (new_result.time < Math.max(min_time, best_result.time))
continue;
/* This should succeed - it's our self-produced valid JSON. */
const new_policy = JSON.parse(decodeURIComponent(new_result.data));
if (new_policy.url !== document.URL)
continue;
best_result = new_result;
policy = new_policy;
}
if (!policy) {
console.warn("WARNING! Using default policy!!!");
policy = {allow: false, nonce: gen_nonce()};
}
for (const signature of extracted_signatures)
document.cookie = `hachette-${signature}=; Max-Age=-1;`;
handle_page_actions(policy.nonce);
if (!policy.allow) {
const old_html = document.documentElement;
const new_html = document.createElement("html");
old_html.replaceWith(new_html);
old_html.hachette_corresponding = new_html;
const modify_end =
modify_on_the_fly(old_html, policy, {node_eater: accept_node});
document.addEventListener("DOMContentLoaded", modify_end);
}
start_activity_info_server();
}
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