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88 lines
2.1 KiB
88 lines
2.1 KiB
/** global: browser */
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/** global: XMLSerializer */
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/* global browser */
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/* eslint-env browser */
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const port = browser.runtime.connect({
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name: 'content.js',
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});
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if (typeof browser !== 'undefined' && typeof document.body !== 'undefined') {
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try {
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port.postMessage({ id: 'init' });
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// HTML
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let html = new XMLSerializer().serializeToString(document);
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const chunks = [];
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const maxCols = 2000;
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const maxRows = 3000;
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const rows = html.length / maxCols;
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let i;
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for (i = 0; i < rows; i += 1) {
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if (i < maxRows / 2 || i > rows - maxRows / 2) {
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chunks.push(html.slice(i * maxCols, (i + 1) * maxCols));
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}
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}
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html = chunks.join('\n');
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// Scripts
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const scripts = Array.prototype.slice
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.apply(document.scripts)
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.filter(script => script.src)
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.map(script => script.src)
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.filter(script => script.indexOf('data:text/javascript;') !== 0);
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port.postMessage({ id: 'analyze', subject: { html, scripts } });
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// JavaScript variables
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const script = document.createElement('script');
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script.onload = () => {
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const onMessage = (event) => {
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if (event.data.id !== 'js') {
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return;
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}
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window.removeEventListener('message', onMessage);
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port.postMessage({ id: 'analyze', subject: { js: event.data.js } });
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script.remove();
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};
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window.addEventListener('message', onMessage);
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port.postMessage({ id: 'get_js_patterns' });
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};
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script.setAttribute('src', browser.extension.getURL('js/inject.js'));
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document.body.appendChild(script);
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} catch (error) {
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port.postMessage({ id: 'log', subject: error });
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}
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}
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port.onMessage.addListener((message) => {
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switch (message.id) {
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case 'get_js_patterns':
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postMessage({
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id: 'patterns',
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patterns: message.response.patterns,
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}, window.location.href);
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break;
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default:
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// Do nothing
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}
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});
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// https://stackoverflow.com/a/44774834
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// https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/tabs/executeScript#Return_value
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undefined; // eslint-disable-line no-unused-expressions
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