LibreChat/api/server/index.js

const express = require('express');
const session = require('express-session')
const connectDb = require('../lib/db/connectDb');
const migrateDb = require('../lib/db/migrateDb');
const path = require('path');
const cors = require('cors');
const routes = require('./routes');
const app = express();
const port = process.env.PORT || 3080;
const host = process.env.HOST || 'localhost'
const userSystemEnabled = process.env.ENABLE_USER_SYSTEM || false
const projectPath = path.join(__dirname, '..', '..', 'client');
connectDb().then(() => {
  console.log('Connected to MongoDB');
  migrateDb();
});

app.use(cors());
app.use(express.json());
app.use(express.static(path.join(projectPath, 'public')));
app.set('trust proxy', 1) // trust first proxy
app.use(session({
  secret: 'chatgpt-clone-random-secrect',
  resave: false,
  saveUninitialized: true,
}))

/* chore: potential redirect error here, can only comment out this block; 
    comment back in if using auth routes i guess */
// app.get('/', routes.authenticatedOrRedirect, function (req, res) {
//   console.log(path.join(projectPath, 'public', 'index.html'));
//   res.sendFile(path.join(projectPath, 'public', 'index.html'));
// });

app.get('/api/me', function (req, res) {
  if (userSystemEnabled) {
    const user = req?.session?.user
    
    if (user) 
      res.send(JSON.stringify({username: user?.username, display: user?.display}));
    else
      res.send(JSON.stringify(null));
  } else {
    res.send(JSON.stringify({username: 'anonymous_user', display: 'Anonymous User'})); 
  }
});

app.use('/api/search', routes.authenticatedOr401, routes.search);
app.use('/api/ask', routes.authenticatedOr401, routes.ask);
app.use('/api/messages', routes.authenticatedOr401, routes.messages);
app.use('/api/convos', routes.authenticatedOr401, routes.convos);
app.use('/api/customGpts', routes.authenticatedOr401, routes.customGpts);
app.use('/api/prompts', routes.authenticatedOr401, routes.prompts);
app.use('/auth', routes.auth);


app.get('/api/models', function (req, res) {
  const hasOpenAI = !!process.env.OPENAI_KEY;
  const hasChatGpt = !!process.env.CHATGPT_TOKEN;
  const hasBing = !!process.env.BING_TOKEN;

  res.send(JSON.stringify({ hasOpenAI, hasChatGpt, hasBing }));
});

app.listen(port, host,  () => {
  if (host=='0.0.0.0')
    console.log(`Server listening on all interface at port ${port}. Use http://localhost:${port} to access it`);
  else
    console.log(`Server listening at http://${host=='0.0.0.0'?'localhost':host}:${port}`);
});