mirror of
https://github.com/QuiteAFancyEmerald/Holy-Unblocker.git
synced 2025-05-12 11:30:01 -04:00
433 lines
No EOL
16 KiB
JavaScript
433 lines
No EOL
16 KiB
JavaScript
const express = require('express'),
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app = express(),
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http = require('http'),
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https = require('https'),
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fs = require('fs'),
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querystring = require('querystring'),
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session = require('express-session'),
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sanitizer = require('sanitizer'),
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websocket = require('./ws-proxy.js'),
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fetch = require('node-fetch');
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const config = JSON.parse(fs.readFileSync('./config.json', {
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encoding: 'utf8'
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}));
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if (!config.prefix.startsWith('/')) {
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config.prefix = `/${config.prefix}`;
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}
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if (!config.prefix.endsWith('/')) {
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config.prefix = `${config.prefix}/`;
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}
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let server;
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let server_protocol;
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const server_options = {
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key: fs.readFileSync('./ssl/default.key'),
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cert: fs.readFileSync('./ssl/default.crt')
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}
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if (config.ssl == true) {
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server = https.createServer(server_options, app);
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server_protocol = 'https://';
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} else {
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server = http.createServer(app);
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server_protocol = 'http://';
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};
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// WebSocket Proxying
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websocket(server);
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console.log(`Alloy Proxy now running on ${server_protocol}0.0.0.0:${config.port}! Proxy prefix is "${config.prefix}"!`);
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server.listen(process.env.PORT || config.port);
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btoa = (str) => {
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str = new Buffer.from(str).toString('base64');
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return str;
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};
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atob = (str) => {
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str = new Buffer.from(str, 'base64').toString('utf-8');
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return str;
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};
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rewrite_url = (dataURL, option) => {
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var websiteURL;
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var websitePath;
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if (option == 'decode') {
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websiteURL = atob(dataURL.split('/').splice(0, 1).join('/'));
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websitePath = '/' + dataURL.split('/').splice(1).join('/');
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} else {
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websiteURL = btoa(dataURL.split('/').splice(0, 3).join('/'));
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websitePath = '/' + dataURL.split('/').splice(3).join('/');
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}
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if (websitePath == '/') {
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return `${websiteURL}`;
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} else return `${websiteURL}${websitePath}`;
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};
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var login = require('./auth');
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app.use(session({
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secret: 'alloy',
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saveUninitialized: true,
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resave: true
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}));
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// We made our own version of body-parser instead, due to issues.
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app.use((req, res, next) => {
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if (req.method == 'POST') {
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req.raw_body = '';
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req.on('data', chunk => {
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req.raw_body += chunk.toString(); // convert Buffer to string
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});
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req.on('end', () => {
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req.str_body = req.raw_body;
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try {
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req.body = JSON.parse(req.raw_body);
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} catch (err) {
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req.body = {}
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}
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next();
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});
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} else return next();
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});
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app.use(`${config.prefix}utils/`, async(req, res, next) => {
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if (req.url.startsWith('/assets/')) {
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res.sendFile(__dirname + '/utils' + req.url);
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}
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if (req.query.url) {
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let url = atob(req.query.url);
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if (url.startsWith('https://') || url.startsWith('http://')) {
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url = url;
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} else if (url.startsWith('//')) {
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url = 'http:' + url;
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} else {
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url = 'http://' + url;
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}
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return res.redirect(307, config.prefix + rewrite_url(url));
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}
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});
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app.post(`${config.prefix}session/`, async(req, res, next) => {
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let url = querystring.parse(req.raw_body).url;
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if (url.startsWith('//')) {
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url = 'http:' + url;
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} else if (url.startsWith('https://') || url.startsWith('http://')) {
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url = url
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} else {
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url = 'http://' + url
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};
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return res.redirect(config.prefix + rewrite_url(url));
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});
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app.use(config.prefix, async(req, res, next) => {
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var proxy = {};
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proxy.url = rewrite_url(req.url.slice(1), 'decode');
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proxy.url = {
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href: proxy.url,
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hostname: proxy.url.split('/').splice(2).splice(0, 1).join('/'),
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origin: proxy.url.split('/').splice(0, 3).join('/'),
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encoded_origin: btoa(proxy.url.split('/').splice(0, 3).join('/')),
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path: '/' + proxy.url.split('/').splice(3).join('/'),
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protocol: proxy.url.split('\:').splice(0, 1).join(''),
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}
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proxy.url.encoded_origin = btoa(proxy.url.origin);
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proxy.requestHeaders = req.headers;
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proxy.requestHeaders['host'] = proxy.url.hostname;
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if (proxy.requestHeaders['referer']) {
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let referer = '/' + String(proxy.requestHeaders['referer']).split('/').splice(3).join('/');
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referer = rewrite_url(referer.replace(config.prefix, ''), 'decode');
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if (referer.startsWith('https://') || referer.startsWith('http://')) {
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referer = referer;
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} else referer = proxy.url.href;
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proxy.requestHeaders['referer'] = referer;
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}
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if (proxy.requestHeaders['origin']) {
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let origin = '/' + String(proxy.requestHeaders['origin']).split('/').splice(3).join('/');
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origin = rewrite_url(origin.replace(config.prefix, ''), 'decode');
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if (origin.startsWith('https://') || origin.startsWith('http://')) {
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origin = origin.split('/').splice(0, 3).join('/');
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} else origin = proxy.url.origin;
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proxy.requestHeaders['origin'] = origin;
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}
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if (proxy.requestHeaders.cookie) {
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delete proxy.requestHeaders.cookie;
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}
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const httpAgent = new http.Agent({
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keepAlive: true
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});
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const httpsAgent = new https.Agent({
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rejectUnauthorized: false,
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keepAlive: true
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});
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proxy.options = {
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method: req.method,
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headers: proxy.requestHeaders,
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redirect: 'manual',
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agent: function(_parsedURL) {
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if (_parsedURL.protocol == 'http:') {
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return httpAgent;
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} else {
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return httpsAgent;
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}
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}
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};
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if (req.method == 'POST') {
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proxy.options.body = req.str_body;
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}
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if (proxy.url.hostname == 'discord.com' && proxy.url.path == '/') {
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return res.redirect(307, config.prefix + rewrite_url('https://discord.com/login'));
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};
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if (proxy.url.hostname == 'www.reddit.com') {
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return res.redirect(307, config.prefix + rewrite_url('https://old.reddit.com'));
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};
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if (!req.url.slice(1).startsWith(`${proxy.url.encoded_origin}/`)) {
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return res.redirect(307, config.prefix + proxy.url.encoded_origin + '/');
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};
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const blocklist = JSON.parse(fs.readFileSync('./blocklist.json', {
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encoding: 'utf8'
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}));
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let is_blocked = false;
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Array.from(blocklist).forEach(blocked_hostname => {
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if (proxy.url.hostname == blocked_hostname) {
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is_blocked = true;
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}
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});
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if (is_blocked == true) {
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return res.send(fs.readFileSync('./utils/error/error.html', 'utf8').toString().replace('%ERROR%', `Error 401: The website '${sanitizer.sanitize(proxy.url.hostname)}' is not permitted!`))
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}
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proxy.response = await fetch(proxy.url.href, proxy.options).catch(err => res.send(fs.readFileSync('./utils/error/error.html', 'utf8').toString().replace('%ERROR%', `Error 400: Could not make request to '${sanitizer.sanitize(proxy.url.href)}'!`)));
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if (typeof proxy.response.buffer != 'function') return;
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proxy.buffer = await proxy.response.buffer();
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proxy.content_type = 'text/plain';
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proxy.response.headers.forEach((e, i, a) => {
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if (i == 'content-type') proxy.content_type = e;
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});
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if (proxy.content_type == null || typeof proxy.content_type == 'undefined') proxy.content_type = 'text/html';
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proxy.sendResponse = proxy.buffer;
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// Parsing the headers from the response to remove square brackets so we can set them as the response headers.
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proxy.headers = Object.fromEntries(
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Object.entries(JSON.parse(JSON.stringify(proxy.response.headers.raw())))
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.map(([key, val]) => [key, val[0]])
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);
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// Parsing all the headers to remove all of the bad headers that could affect proxies performance.
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Object.entries(proxy.headers).forEach(([header_name, header_value]) => {
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if (header_name.startsWith('content-encoding') || header_name.startsWith('x-') || header_name.startsWith('cf-') || header_name.startsWith('strict-transport-security') || header_name.startsWith('content-security-policy')) {
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delete proxy.headers[header_name];
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}
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});
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// If theres a location for a redirect in the response, then the proxy will get the response location then redirect you to the proxied version of the url.
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if (proxy.response.headers.get('location')) {
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return res.redirect(307, config.prefix + rewrite_url(String(proxy.response.headers.get('location'))));
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}
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res.status(proxy.response.status);
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res.set(proxy.headers);
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res.contentType(proxy.content_type);
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if (proxy.content_type.startsWith('text/html')) {
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req.session.url = proxy.url.origin;
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proxy.sendResponse = proxy.sendResponse.toString()
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.replace(/integrity="(.*?)"/gi, '')
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.replace(/nonce="(.*?)"/gi, '')
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.replace(/(href|src|poster|data|action|srcset)="\/\/(.*?)"/gi, `$1` + `="http://` + `$2` + `"`)
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.replace(/(href|src|poster|data|action|srcset)='\/\/(.*?)'/gi, `$1` + `='http://` + `$2` + `'`)
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.replace(/(href|src|poster|data|action|srcset)="\/(.*?)"/gi, `$1` + `="${config.prefix}${proxy.url.encoded_origin}/` + `$2` + `"`)
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.replace(/(href|src|poster|data|action|srcset)='\/(.*?)'/gi, `$1` + `='${config.prefix}${proxy.url.encoded_origin}/` + `$2` + `'`)
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.replace(/'(https:\/\/|http:\/\/)(.*?)'/gi, function(str) {
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str = str.split(`'`).slice(1).slice(0, -1).join(``);
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return `'${config.prefix}${rewrite_url(str)}'`
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})
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.replace(/"(https:\/\/|http:\/\/)(.*?)"/gi, function(str) {
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str = str.split(`"`).slice(1).slice(0, -1).join(``);
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return `"${config.prefix}${rewrite_url(str)}"`
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})
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.replace(/(window|document).location.href/gi, `"${proxy.url.href}"`)
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.replace(/(window|document).location.hostname/gi, `"${proxy.url.hostname}"`)
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.replace(/(window|document).location.pathname/gi, `"${proxy.url.path}"`)
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.replace(/location.href/gi, `"${proxy.url.href}"`)
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.replace(/location.hostname/gi, `"${proxy.url.hostname}"`)
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.replace(/location.pathname/gi, `"${proxy.url.path}"`)
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.replace(/<html(.*?)>/gi, `<html` + '$1' + `><script src="${config.prefix}utils/assets/inject.js" id="_alloy_data" prefix="${config.prefix}" url="${btoa(proxy.url.href)}"></script>`);
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// Temp hotfix for Youtube search bar until my script injection can fix it.
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if (proxy.url.hostname == 'www.youtube.com') {
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proxy.sendResponse = proxy.sendResponse.replace(/\/results/gi, `${config.prefix}${proxy.url.encoded_origin}/results`);
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};
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} else if (proxy.content_type.startsWith('text/css')) {
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proxy.sendResponse = proxy.sendResponse.toString()
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.replace(/url\("\/\/(.*?)"\)/gi, `url("http://` + `$1` + `")`)
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.replace(/url\('\/\/(.*?)'\)/gi, `url('http://` + `$1` + `')`)
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.replace(/url\(\/\/(.*?)\)/gi, `url(http://` + `$1` + `)`)
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.replace(/url\("\/(.*?)"\)/gi, `url("${config.prefix}${proxy.url.encoded_origin}/` + `$1` + `")`)
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.replace(/url\('\/(.*?)'\)/gi, `url('${config.prefix}${proxy.url.encoded_origin}/` + `$1` + `')`)
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.replace(/url\(\/(.*?)\)/gi, `url(${config.prefix}${proxy.url.encoded_origin}/` + `$1` + `)`)
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.replace(/"(https:\/\/|http:\/\/)(.*?)"/gi, function(str) {
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str = str.split(`"`).slice(1).slice(0, -1).join(``);
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return `"${config.prefix}${rewrite_url(str)}"`
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})
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.replace(/'(https:\/\/|http:\/\/)(.*?)'/gi, function(str) {
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str = str.split(`'`).slice(1).slice(0, -1).join(``);
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return `'${config.prefix}${rewrite_url(str)}'`
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})
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.replace(/\((https:\/\/|http:\/\/)(.*?)\)/gi, function(str) {
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str = str.split(`(`).slice(1).join(``).split(')').slice(0, -1).join('');
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return `(${config.prefix}${rewrite_url(str)})`
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});
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};
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// We send the response from the server rewritten.
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res.send(proxy.sendResponse);
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});
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app.use('/', express.static('public'));
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app.get('/', async(req, res) => {
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if (req.query['pd'].includes('')) {
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return res.send(fs.readFileSync('./public/e.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['a'].includes('')) {
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return res.send(fs.readFileSync('./public/a.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['b'].includes('')) {
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return res.send(fs.readFileSync('./public/b.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['p'].includes('')) {
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return res.send(fs.readFileSync('./public/p.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['x'].includes('')) {
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return res.send(fs.readFileSync('./public/x.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['d'].includes('')) {
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return res.send(fs.readFileSync('./public/d.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['y'].includes('')) {
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return res.send(fs.readFileSync('./public/y.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['yh'].includes('')) {
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return res.send(fs.readFileSync('./public/yh.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['ym'].includes('')) {
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return res.send(fs.readFileSync('./public/ym.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['g'].includes('')) {
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return res.send(fs.readFileSync('./public/g.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['k'].includes('')) {
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return res.send(fs.readFileSync('./public/k.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['m'].includes('')) {
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return res.send(fs.readFileSync('./public/m.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['c'].includes('')) {
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return res.send(fs.readFileSync('./public/c.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['z'].includes('')) {
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return res.send(fs.readFileSync('./public/z.html', {
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encoding: 'utf-8'
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}));
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}
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if (req.query['t'].includes('')) {
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return res.send(fs.readFileSync('./public/t.html', {
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encoding: 'utf-8'
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}));
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}
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});
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app.use(async(req, res, next) => {
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if (req.headers['referer']) {
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let referer = '/' + String(req.headers['referer']).split('/').splice(3).join('/');
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referer = rewrite_url(referer.replace(config.prefix, ''), 'decode').split('/').splice(0, 3).join('/');
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if (referer.startsWith('https://') || referer.startsWith('http://')) {
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res.redirect(307, config.prefix + btoa(referer) + req.url)
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} else {
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if (req.session.url) {
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res.redirect(307, config.prefix + btoa(req.session.url) + req.url)
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} else return next();
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}
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} else if (req.session.url) {
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res.redirect(307, config.prefix + btoa(req.session.url) + req.url)
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} else return next();
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}); |