const express = require('express');
const proxy = require('express-http-proxy');
const url = require('url');
const app = express();
const targetUrl = 'https://chatgpt.com/';

app.use('/', proxy(targetUrl, {
  proxyReqPathResolver: (req) => {
    return req.originalUrl;
  },
  proxyReqOptDecorator: (proxyReqOpts, srcReq) => {
    proxyReqOpts.headers['Host'] = new URL(targetUrl).host;
    proxyReqOpts.headers['Referer'] = targetUrl;
    return proxyReqOpts;
  },
  userResDecorator: function (proxyRes, proxyResData, userReq, userRes) {
    let data = proxyResData.toString('utf8');
    if (proxyRes.headers['content-type'] && proxyRes.headers['content-type'].includes('text/html')) {
      data = data.replace(/(https?:\/\/[^\/]+)/g, (match, p1) => {
        if (p1 === targetUrl) return ''; 
        return new URL(p1, userReq.protocol + '://' + userReq.headers.host).href;
      });
    }
    return data;
  }
}));

const port = 7860;
app.listen(port, () => {
  console.log(`Сервер запущен на порту ${port}`);
});