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background.js
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background.js
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/*
* Copyright (C) 2019-2023 didierfred@gmail.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
"use strict";
let connections = {};
/*
* Listen for message form tab and send it to devtools
**/
const notify = (message, sender, sendResponse) => {
if (sender.tab) {
let tabId = sender.tab.id;
if (tabId in connections) connections[tabId].postMessage(message);
else console.warn("Tab not found in connection list.");
}
else console.warn("sender.tab not defined.");
// Send response to solve even if not needed to solve issue
// https://bugs.chromium.org/p/chromium/issues/detail?id=1304272
if (sendResponse) sendResponse();
}
chrome.runtime.onMessage.addListener(notify);
console.log("start background process");
// Listen to message from devTools
chrome.runtime.onConnect.addListener((devToolsConnection) => {
console.log("received onConnect");
// assign the listener function to a variable so we can remove it later
let devToolsListener = (message, sender, sendResponse) => {
// in case message form devtools is to clean cache
if (message.clearBrowserCache) {
clearBrowserCache();
}
// Otherwise message is to inject script
else {
// Inject a content script into the identified tab
console.log(`received script ${message.scriptToInject} to execute form tabId ${message.tabId}`);
if (!connections[message.tabId]) connections[message.tabId] = devToolsConnection;
injectAnalyseScript(message.tabId,message.scriptToInject);
}
// Send response to solve even if not needed to solve issue
// https://bugs.chromium.org/p/chromium/issues/detail?id=1304272
if (sendResponse) sendResponse();
}
// add the listener
devToolsConnection.onMessage.addListener(devToolsListener);
devToolsConnection.onDisconnect.addListener((port) => {
devToolsConnection.onMessage.removeListener(devToolsListener);
Object.keys(connections).map(tab => {
if (connections[tab] == port) {
delete connections[tab];
return false;
}
});
});
});
function injectAnalyseScript(tabId,script) {
if (chrome.tabs.executeScript) injectAnalyseScriptWithManifestV2(tabId,script);
else injectAnalyseScriptWithManifestV3(tabId,script);
}
function injectAnalyseScriptWithManifestV2(tabId,script) {
chrome.tabs.executeScript(tabId,
{file: script, allFrames: true});
}
function injectAnalyseScriptWithManifestV3(tabId,script) {
chrome.scripting.executeScript({
target: {tabId},
files: [script]
});
}
function clearBrowserCache()
{
chrome.browsingData.remove({
}, {
"cache": true,
"cookies": false,
"downloads": true,
"formData": false,
"history": false,
"indexedDB": false,
"localStorage": false,
"passwords": false,
"serviceWorkers": true,
}, console.log("Cache cleaning done"));
}