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index.js
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index.js
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require("./command");
const express = require("express");
const path = require("path");
const session = require("express-session");
const MongoStore = require("connect-mongo");
const axios = require("axios");
const qs = require("querystring");
const crypto = require("crypto");
const mongoose = require("mongoose");
const User = require("./model/users");
const urlRouter = require("./routers/url");
const bodyParser = require("body-parser");
const handleConnection = require("./connection/config");
require("dotenv").config();
require("./command.js");
const app = express();
const PORT = process.env.PORT || 8000;
const DB_URL = process.env.DATABASE_URL;
const CLIENT_ID = process.env.CLIENT_ID;
const CLIENT_SECRET = process.env.CLIENT_SECRET;
const SECRECT = process.env.SECRECT;
const REDIRECT_URI = "https://api.adityam.live/auth/callback";
// add handler
handleConnection(DB_URL);
app.use(bodyParser.json());
app.use(
session({
secret: SECRECT,
resave: false,
saveUninitialized: false,
store: MongoStore.create({ mongoUrl: DB_URL }),
})
);
app.set("view engine", "ejs");
app.set("views", path.resolve("./views"));
app.use(express.static(path.resolve("./public")));
// Generate code verifier and challenge
function generateCodeVerifier() {
return crypto
.randomBytes(32)
.toString("base64")
.replace(/=/g, "")
.replace(/\+/g, "-")
.replace(/\//g, "_");
}
function generateCodeChallenge(codeVerifier) {
return crypto
.createHash("sha256")
.update(codeVerifier)
.digest("base64")
.replace(/=/g, "")
.replace(/\+/g, "-")
.replace(/\//g, "_");
}
app.get("/auth", (req, res) => {
const codeVerifier = generateCodeVerifier();
const codeChallenge = generateCodeChallenge(codeVerifier);
req.session.codeVerifier = codeVerifier;
const authUrl = `https://discord.com/api/oauth2/authorize?client_id=${CLIENT_ID}&redirect_uri=${encodeURIComponent(
REDIRECT_URI
)}&response_type=code&scope=identify email guilds&code_challenge=${codeChallenge}&code_challenge_method=S256`;
res.redirect(authUrl);
});
app.get("/auth/callback", async (req, res) => {
const code = req.query.code;
if (!code) {
console.error("No code returned from Discord");
res.status(400).send("No code returned from Discord");
return;
}
const codeVerifier = req.session.codeVerifier;
if (!codeVerifier) {
console.error("No code verifier found in session");
res.status(400).send("No code verifier found in session");
return;
}
try {
const tokenResponse = await axios.post(
"https://discord.com/api/oauth2/token",
qs.stringify({
client_id: CLIENT_ID,
client_secret: CLIENT_SECRET,
grant_type: "authorization_code",
code: code,
redirect_uri: REDIRECT_URI,
code_verifier: codeVerifier,
}),
{
headers: {
"Content-Type": "application/x-www-form-urlencoded",
},
}
);
if (tokenResponse.status !== 200) {
console.error(
"Error getting token:",
tokenResponse.status,
tokenResponse.statusText
);
res.status(500).send("Error getting token");
return;
}
const accessToken = tokenResponse.data.access_token;
const userResponse = await axios.get("https://discord.com/api/users/@me", {
headers: {
Authorization: `Bearer ${accessToken}`,
},
});
if (userResponse.status !== 200) {
console.error(
"Error getting user info:",
userResponse.status,
userResponse.statusText
);
res.status(500).send("Error getting user info");
return;
}
const { id, username, discriminator } = userResponse.data;
let user = await User.findOne({ discordId: id });
if (!user) {
user = new User({
discordId: id,
username,
discriminator,
});
await user.save();
}
req.session.user = user;
return res.render("success"); // Redirect to main page after successful authentication
} catch (error) {
console.error("Error during Discord OAuth2 process:", error.message);
res
.status(500)
.send("An error occurred during the authentication process.");
}
});
app.use("/", urlRouter);
app.listen(PORT, () => {
console.log(`Server is running successfully at PORT ${PORT}`);
});