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index.js
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/**
*
* Known Bugs:
* Timers not all starting again after app restart
* Add some circle elements to host.ejs and listen.ejs to make it prettier
*
*/
"use strict";
var express = require("express");
var request = require("request");
var cors = require("cors");
var querystring = require("querystring");
var cookieParser = require("cookie-parser");
var fs = require("fs");
var mysql = require("mysql2");
var bodyParser = require("body-parser");
var https = require("https");
var http = require("http");
var moment = require("moment");
var redirectToHTTPS = require("express-http-to-https").redirectToHTTPS;
const config = JSON.parse(fs.readFileSync("./config.json"));
const sanatize = new RegExp(/[^A-Za-z0-9]+/g);
var connection;
function handleDisconnect() {
connection = mysql.createConnection({
host: config.mysql.host,
user: config.mysql.user,
password: config.mysql.password,
database: config.mysql.database,
multipleStatements: false,
});
connection.connect(function (err) {
if (err) {
console.log("Error connecting to MySQL Database: ", err);
setTimeout(handleDisconnect, 2000);
}
console.log("Connected to MySQL, ID: " + connection.threadId);
});
connection.on("error", function (err) {
console.log("Error connecting to MySQL Database: ", err);
if (err.code === "PROTOCOL_CONNECTION_LOST") {
handleDisconnect();
} else {
throw err;
}
});
}
handleDisconnect();
var client_id = config.spotify.client_id; // Your client id
var client_secret = config.spotify.client_secret; // Your secret
var redirect_uri = config.redirect_uris.host; // Your redirect uri
var redirect_uri_listen = config.redirect_uris.listen; // listener redirect uri
function generateRandomString(length) {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for (var i = 0; i < length; i++) {
text += possible.charAt(Math.floor(Math.random() * possible.length));
}
return text;
}
var stateKey = "spotify_auth_state";
var app = express();
app
.use(express.static(__dirname + "/public"))
.use(cors())
.use(cookieParser())
.use(bodyParser.text({ type: "application/json" }))
.set("view engine", "ejs");
app.get("/", function (req, res) {
var codeGiven = req.query.code ? req.query.code : null;
res.render("pages/index", {
codeGiven: codeGiven,
});
});
app.get("/login", function (req, res) {
var state = generateRandomString(16);
res.cookie(stateKey, state);
// your application requests authorization
var scope = "user-read-currently-playing user-read-private";
res.redirect(
"https://accounts.spotify.com/authorize?" +
querystring.stringify({
response_type: "code",
client_id: client_id,
scope: scope,
redirect_uri: redirect_uri,
state: state,
})
);
});
app.get("/callback", function (req, res) {
// your application requests refresh and access tokens
// after checking the state parameter
var code = req.query.code || null;
var state = req.query.state || null;
var storedState = req.cookies ? req.cookies[stateKey] : null;
if (state === null || state !== storedState) {
res.redirect(
"/#" +
querystring.stringify({
error: "state_mismatch",
})
);
} else {
res.clearCookie(stateKey);
var authOptions = {
url: "https://accounts.spotify.com/api/token",
form: {
code: code,
redirect_uri: redirect_uri,
grant_type: "authorization_code",
},
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
json: true,
};
request.post(authOptions, function (error, response, body) {
if (!error && response.statusCode === 200) {
// console.log(JSON.stringify(body));
var access_token = body.access_token,
refresh_token = body.refresh_token;
var host_code = generateRandomString(12);
var options = {
url: "https://api.spotify.com/v1/me",
headers: {
Authorization: "Bearer " + access_token,
},
json: true,
};
request.get(options, function (error, response, body) {
if (error) console.error(new Date(), error);
if (response.statusCode !== 200) return;
let host_id = body.id;
connection.query(`SELECT * FROM tokens WHERE host_id = '${host_id}' AND status = 'true';`, function (error, results, fields) {
if (error) console.error(new Date(), error);
if (results.length === 0) {
connection.query(`INSERT INTO tokens (host_id, host_code, refresh_token, status) VALUES ('${host_id}', '${host_code}', '${refresh_token}', 'true');`, function (error, results, fields) {
if (error) console.error(new Date(), error);
in_party[host_code] = in_party[host_code] || {};
res.render("pages/host", {
code: host_code,
refresh: refresh_token,
listeners: 0,
error: null,
});
return;
// res.send(`Your listen-along ID is ${id}, tell other people to go to http://localhost:8888/listen/${id} to listen to whatever you are! (You only need to generate an ID once)`);
});
} else {
in_party[results[0].host_code] = in_party[results[0].host_code] || {};
res.render("pages/host", {
code: results[0].host_code,
refresh: results[0].refresh_token,
listeners: Object.keys(in_party[results[0].host_code]).length,
error: "You are already hosting a Spotify music party",
});
return;
}
});
});
} else {
res.redirect(
"/#" +
querystring.stringify({
error: "invalid_token",
})
);
}
});
}
});
app.post("/stopfullparty", function (req, res, next) {
try {
let json = JSON.parse(req.body);
let host_code = json.code;
let refresh_token = json.refresh;
if (sanatize.test(host_code)) {
res.send({ status: 400, message: "An unexpected error occured while parsing the host code" });
return;
}
connection.query(`SELECT * FROM tokens WHERE host_code = '${host_code}' AND refresh_token = '${refresh_token}';`, function (error, results, fields) {
if (error) {
console.error("There was an error retrieving the specified host code. Please try again later:", error);
res.send({ status: 400, message: "There was an error retrieving the specified host code. Please try again later." });
return;
}
if (!results[0] || results.length !== 1) {
console.error(`Specified ID not found: ${host_code}`);
res.send({ status: 400, message: "You do not have any active Spotify music parties running." });
return;
} else {
var authOptions = {
url: "https://accounts.spotify.com/api/token",
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
form: {
grant_type: "refresh_token",
refresh_token: refresh_token,
},
json: true,
};
request.post(authOptions, function (error, response, body) {
if (error || response.statusCode !== 200) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Unable to get authentication token from Spotify servers.`);
res.send({ status: 400, message: "Unable to get authentication token from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
var access_token = body.access_token;
var options = {
url: "https://api.spotify.com/v1/me",
headers: {
Authorization: "Bearer " + access_token,
},
json: true,
};
request.get(options, function (error, response, body) {
if (error || response.statusCode !== 200) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Unable to get host profile from Spotify servers.`);
res.send({ status: 400, message: "Unable to get host profile from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
let host_id = body.id;
connection.query(`UPDATE tokens SET status = 'false' WHERE host_id = '${host_id}';`, function (error, results, fields) {
if (error) {
console.error(new Date(), error);
res.send({ status: 400, message: "There was a database error retrieving the specified host code. (Error Code: SFP-US-M1)" });
return;
}
res.send({ status: 200, message: "You have successfully stopped all your Spotify music parties." });
});
return;
});
});
}
});
} catch (error) {
console.error(new Date(), error);
res.send({ status: 400, message: "There was an error stopping the Spotify music party (Error Code: SFP-FE-TC1)" });
}
});
app.get("/about", function (req, res) {
res.render("pages/about");
return;
});
app.get("/legal", function (req, res) {
res.redirect("/tos.html");
return;
});
app.get("/listen", function (req, res) {
var state = generateRandomString(20);
res.cookie(stateKey, state);
var codeGiven = req.query.code && req.query.code !== "null" ? req.query.code : null;
res.cookie("codeGiven", codeGiven);
var scope = "user-modify-playback-state user-read-private";
res.redirect(
"https://accounts.spotify.com/authorize?" +
querystring.stringify({
response_type: "code",
client_id: client_id,
scope: scope,
redirect_uri: redirect_uri_listen,
state: state,
codeGiven: codeGiven,
})
);
});
app.get("/callbacklisten", function (req, res) {
var code = req.query.code || null;
var state = req.query.state || null;
var codeGiven = req.cookies ? req.cookies["codeGiven"] : null;
if (codeGiven === "j:null") codeGiven = null;
if (state === null) {
res.redirect(
"/#" +
querystring.stringify({
error: "state_mismatch",
})
);
} else {
res.clearCookie(stateKey);
var authOptions = {
url: "https://accounts.spotify.com/api/token",
form: {
code: code,
redirect_uri: redirect_uri_listen,
grant_type: "authorization_code",
},
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
json: true,
};
request.post(authOptions, function (error, response, body) {
if (!error && response.statusCode === 200) {
var access_token = body.access_token;
var refresh_token = body.refresh_token;
var options = {
url: "https://api.spotify.com/v1/me",
headers: {
Authorization: "Bearer " + access_token,
},
json: true,
};
request.get(options, function (error, response, body) {
if (error) console.error(new Date(), error);
if (response.statusCode !== 200) return;
let listener_id = body.id;
var error_message = Object.values(in_party).find((element) => {
return Object.keys(element).includes(listener_id);
});
res.render("pages/listen", {
token: access_token,
refresh: refresh_token,
error: error_message ? "You are already in a Spotify music party." : null,
codeGiven: codeGiven,
});
return;
});
} else {
res.redirect(
"/#" +
querystring.stringify({
error: "invalid_token",
})
);
}
});
}
});
app.post("/startparty", function (req, res, next) {
try {
let json = JSON.parse(req.body);
let token = json.token;
let refresh = json.refresh;
let host_code = json.host;
if (sanatize.test(host_code)) {
res.send({ status: 400, message: "An unexpected error occured while parsing the host code." });
return;
}
connection.query(`SELECT * FROM tokens WHERE host_code = '${host_code}' AND status = 'true';`, function (error, results, fields) {
if (error) {
console.error("There was an error retrieving the specified host code. Please try again later:", error);
res.send({ status: 400, message: "There was an error retrieving the specified host code. Please try again later." });
return;
}
if (!results[0] || results.length !== 1) {
console.error(`Specified ID not found: ${host_code}`);
res.send({ status: 400, message: "The host has not setup their Spotify account to work with listen-along yet, or the code is invalid! Tell the host to go to listenalong.live to grant us permissions and to generate their ID!" });
return;
} else {
var authOptions = {
url: "https://accounts.spotify.com/api/token",
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
form: {
grant_type: "refresh_token",
refresh_token: results[0].refresh_token, // host refresh token
},
json: true,
};
request.post(authOptions, function (error, response, body) {
if (error || response.statusCode !== 200) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Unable to get authentication token from Spotify servers.`);
res.send({ status: 400, message: "Unable to get authentication token from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
var access_token = body.access_token; // host access token
var options = {
url: "https://api.spotify.com/v1/me",
headers: {
Authorization: "Bearer " + token,
},
json: true,
};
request.get(options, function (error, response, body) {
// get listener id from 'token' variable
if (error || response.statusCode !== 200) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Unable to get listener profile from Spotify servers. (Rate Limit)`);
res.send({ status: 400, message: "Unable to get listener profile from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
let listener_id = body.id;
let premium_member = body.product;
console.log(JSON.stringify(body));
if (premium_member !== "premium") {
res.send({ status: 400, message: "You are not a Spotify Premium member. You can only HOST parties and not JOIN them." });
return;
}
if (listener_id === results[0].host_id) {
res.send({ status: 400, message: "You cannot join your own party. Get some other people to join you!" });
return;
}
var error_message = Object.values(in_party).find((element) => {
return Object.keys(element).includes(listener_id);
});
if (error_message) {
console.log(`Listener ${listener_id} already listening to music party...`);
res.send({ status: 400, message: "You are already listening to a music party, press the 'Stop Listening Along' button and try again." });
return;
}
var options = {
url: "https://api.spotify.com/v1/me/player/currently-playing",
headers: {
Authorization: "Bearer " + access_token,
},
json: true,
};
request.get(options, function (error, response, body) {
if (error || !response.statusCode.toString().startsWith("2")) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Unable to get host profile from Spotify servers because of Spotify API Rate-Limiting. Please try again later.`);
res.send({ status: 400, message: "Unable to get host profile from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
var options = {
url: "https://api.spotify.com/v1/me/player/play",
headers: {
Authorization: "Bearer " + token,
},
body: {
uris: [body.item.uri],
position_ms: body.progress_ms,
},
json: true,
};
let currentSong = body.item.uri;
// play music to person that requested it
request.put(options, function (error, response, body) {
if (error || response.statusCode !== 204) {
if (error) console.error(new Date(), error);
console.error(new Date(), `Your playback device is inactive, play some music in Spotify and rejoin the party.`);
res.send({ status: 400, message: "Your playback device is inactive, play some music in Spotify and rejoin the party." });
return;
}
host_current_song[host_code] = host_current_song[host_code] || {};
host_current_song[host_code][listener_id] = host_current_song[host_code][listener_id] || currentSong;
let data = {
host_code: host_code,
listener_refresh: refresh,
listener_id: listener_id,
expires_in: moment(new Date()).add(1, "hours"),
};
in_party[data.host_code] = in_party[data.host_code] || {};
if (!Object.keys(in_party[data.host_code]).includes(data.listener_id)) in_party[data.host_code][data.listener_id] = { expires_in: moment(new Date()).add(1, "hours"), error_tries: 0 };
new updateSong(data);
res.send({ status: 200, message: "You have successfully joined the Spotify music party!" });
return;
});
});
});
});
}
});
} catch (error) {
console.error(new Date(), error);
res.send({ status: 400, message: "There was an error joining the Spotify music party (Error Code: SP-J-TC2)" });
}
});
app.post("/stopparty", function (req, res, next) {
try {
let json = JSON.parse(req.body);
// let token = json.token;
let refresh = json.refresh;
var authOptions = {
url: "https://accounts.spotify.com/api/token",
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
form: {
grant_type: "refresh_token",
refresh_token: refresh,
},
json: true,
};
request.post(authOptions, function (error, response, body) {
if (error || response.statusCode !== 200) {
console.error(new Date(), error);
res.send({ status: 400, message: "Unable to get authentication token from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
var options = {
url: "https://api.spotify.com/v1/me",
headers: {
Authorization: "Bearer " + body.access_token,
},
json: true,
};
request.get(options, function (error, response, body) {
if (error || response.statusCode !== 200) {
console.error(new Date(), error);
res.send({ status: 400, message: "Unable to get listener profile from Spotify servers because of Spotify API Rate-Limiting. Please try again later." });
return;
}
let listener_id = body.id;
var error_message = Object.values(in_party).find((element) => {
return Object.keys(element).includes(listener_id);
});
if (!error_message) {
res.send({ status: 400, message: "You are not listening to a Spotify music party." });
return;
}
try {
for (let i = 0; i < Object.keys(in_party).length; i++) {
const index = Object.keys(Object.values(in_party)[i]).indexOf(listener_id);
if (index > -1) Object.keys(Object.values(in_party)[i]).splice(index, 1);
}
res.send({ status: 200, message: "You successfully stopped listening along." });
return;
} catch (error) {
console.error(new Date(), error);
res.send({ status: 400, message: "There was an error leaving the Spotify music party (Error Code: SP-L-TC1)" });
}
});
});
} catch (error) {
console.error(new Date(), error);
res.send({ status: 400, message: "There was an error leaving the Spotify music party (Error Code: SP-L-TC2)" });
}
});
app.get("/tos", function (req, res) {
res.redirect("/tos.html");
});
app.get("/privacy", function (req, res) {
res.redirect("/privacy.html");
});
app.get("/abcrestart123", function (req, res) {
res.json({ message: "ok" });
console.log(`Restarting application through website command`);
console.log(eval(`process.exit(0)`));
});
app.use((req, res, next) => {
const error = new Error("Not found");
error.status = 404;
next(error);
});
app.use((error, req, res, next) => {
res.status(error.status || 500).redirect("/");
});
var host_current_song = {};
var in_party = {};
var updateSong = function (data) {
try {
var self = this;
self.start(data);
} catch (error) {
console.error(new Date(), error);
self.removeListener_(data);
}
};
updateSong.prototype.start = function (data) {
try {
var self = this;
if (!Object.keys(in_party[data.host_code]).includes(data.listener_id)) throw new Error(`${data.listener_id} stopped listening to party, removing user from array...`);
connection.query(`SELECT * FROM tokens WHERE host_code = '${data.host_code}' AND status = 'true';`, function (error, results, fields) {
if (error) return console.error(new Date(), error);
if (!results[0] || results.length !== 1) return;
self.getHostAccessToken_(data, results[0].refresh_token);
});
} catch (error) {
console.error(new Date(), error);
self.removeListener_(data);
}
};
updateSong.prototype.getHostAccessToken_ = function (data, refresh_token) {
try {
var self = this;
request.post(
{
url: "https://accounts.spotify.com/api/token",
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
form: {
grant_type: "refresh_token",
refresh_token: refresh_token,
},
json: true,
},
function (error, response, body) {
if (error) return console.error(new Date(), error);
if (response.statusCode === 200) {
self.getHostCurrentlyPlaying_(data, body.access_token);
} else {
console.error(`[getHostAccessToken_] Response Code: ${response.statusCode} with user ${data.listener_id}. Rate limiting?`);
}
}
);
} catch (error) {
self.handleError_(data, error);
}
};
updateSong.prototype.getHostCurrentlyPlaying_ = function (data, access_token) {
try {
var self = this;
request.get(
{
url: "https://api.spotify.com/v1/me/player/currently-playing",
headers: {
Authorization: "Bearer " + access_token,
},
json: true,
},
function (error, response, body) {
if (error) return console.error(new Date(), error);
if (response.statusCode === 200) {
host_current_song[data.host_code][data.listener_id] = host_current_song[data.host_code][data.listener_id] || host_current_song[data.host_code];
if (host_current_song[data.host_code][data.listener_id] !== body.item.uri) {
self.getListenerAccessToken_(data, body);
// console.log(`Switching song for listener ${data.listener_id}, host id: ${data.host_code}`);
} else {
self.resetTimer_(data);
// console.log(`Song has NOT changed for listener ${data.listener_id}, host id: ${data.host_code}`);
}
} else {
console.error(`[getHostCurrentlyPlaying_] Response Code: ${response.statusCode} with user ${data.listener_id}. Rate limiting?`);
}
}
);
} catch (error) {
self.handleError_(data, error);
}
};
updateSong.prototype.getListenerAccessToken_ = function (data, song_info) {
try {
var self = this;
request.post(
{
url: "https://accounts.spotify.com/api/token",
headers: {
Authorization: "Basic " + Buffer.from(client_id + ":" + client_secret).toString("base64"),
},
form: {
grant_type: "refresh_token",
refresh_token: data.listener_refresh,
},
json: true,
},
function (error, response, body) {
if (error) return console.error(new Date(), error);
if (response.statusCode === 200) {
// data.listener_refresh = body.refresh_token;
// console.log(data.listener_id);
self.updateListenerSong_(data, body.access_token, song_info);
} else {
console.error(`[getListenerAccessToken_] Response Code: ${response.statusCode} with user ${data.listener_id}. Rate limiting?`);
}
}
);
} catch (error) {
self.handleError_(data, error);
}
};
updateSong.prototype.updateListenerSong_ = function (data, access_token, song_info) {
try {
var self = this;
request.put(
{
url: "https://api.spotify.com/v1/me/player/play",
headers: {
Authorization: "Bearer " + access_token,
},
body: {
uris: [song_info.item.uri],
position_ms: song_info.progress_ms,
},
json: true,
},
function (error, response, body) {
if (error) return console.error(new Date(), error);
if (response.statusCode === 204) {
host_current_song[data.host_code][data.listener_id] = song_info.item.uri;
self.resetTimer_(data);
} else {
console.error(`[updateListenerSong_] Response Code: ${response.statusCode} with user ${data.listener_id}. Rate limiting?`);
}
}
);
} catch (error) {
self.handleError_(data, error);
}
};
updateSong.prototype.resetTimer_ = function (data) {
try {
var self = this;
if (moment(in_party[data.host_code][data.listener_id].expires_in).diff(moment(), "seconds") > 0) {
setTimeout(function () {
self.start(data);
}, 5000);
} else {
console.error(`Listener ID ${data.listener_id} has expired, removing user.`);
self.removeListener_(data);
}
} catch (error) {
self.handleError_(data, error);
}
};
updateSong.prototype.removeListener_ = function (data) {
try {
var self = this;
console.log(`Removing user ${data.listener_id}`);
const index = Object.keys(in_party[data.host_code]).indexOf(data.listener_id);
if (index > -1) delete in_party[data.host_code][data.listener_id];
delete host_current_song[data.host_code][data.listener_id];
} catch (error) {
console.error(new Date(), error);
}
};
updateSong.prototype.handleError_ = function (data, error) {
try {
var self = this;
console.error(new Date().toLocaleString("en-US"), error);
if (!Object.keys(in_party[data.host_code]).includes(data.listener_id)) {
console.error(`${data.listener_id} stopped listening to party, removing user from array...`);
self.removeListener_(data);
} else {
in_party[data.host_code][data.listener_id].error_tries += 1;
if (in_party[data.host_code][data.listener_id].error_tries === 4) {
console.error(`${data.listener_id} reached the maximum error limit, removing user from array...`);
self.removeListener_(data);
}
}
} catch (error) {
console.error(new Date().toLocaleString("en-US"), error);
}
};
const privateKey = fs.readFileSync("private.key", "utf8");
const certificate = fs.readFileSync("certificate.crt", "utf8");
const ca = fs.readFileSync("ca_bundle.crt", "utf8");
const credentials = { key: privateKey, cert: certificate, ca: ca };
const httpsServer = https.createServer(credentials, app);
app.use(redirectToHTTPS([/localhost:(\d{4})/], [/\/insecure/], 301));
httpsServer.listen(443, () => {
console.log("HTTPS Server running on port 443");
});
// app.listen(80);
// HTTPS
http
.createServer(function (req, res) {
res.writeHead(301, { Location: "https://" + req.headers["host"] + req.url });
res.end();
})
.listen(80);