liveGameAPIAddress.js

process.env["NODE_TLS_REJECT_UNAUTHORIZED"] = 0;
async function getLiveGameAPIAddress() {
    return new Promise((resolve, reject) => {
        const exec = require('child_process').exec;
        const fetch = require("node-fetch");

        exec('tasklist', function (err, stdout, stderr) {
            const leagueLine = stdout.split("\n").filter(l => l.startsWith("League of Legends.exe"))[0];
            if (leagueLine == null) {
                reject("No League of Legends client found");
                return;
            }
            const words = leagueLine.split(" ").filter(s => s.length).map(s => s.trim());
            // console.log(`pid = ${words[3]}`);

            exec('netstat -ano', async function (err, stdout, stderr) {
                const lines = stdout.split("\n");
                // console.log(lines[0]);
                const tcpConnections = lines.filter(w => w.indexOf(words[3]) >= 0 && w.indexOf("LISTENING") >= 0);

                for (let conn of tcpConnections) {
                    const connectionData = conn.split(" ").filter(s => s.length);
                    // console.log(connectionData);
                    try {
                        const response = await fetch(`https://${connectionData[1]}/liveclientdata/allgamedata`);
                        
                        if (response.ok) {
                            resolve(connectionData[1]);
                            return;
                        }
                    }
                    catch (e) {
                        // console.error(e);
                    }
                }

                reject("Unable to determine web server!");
            });
        });
    });
}

getLiveGameAPIAddress().then(console.log);