network scanner for TL-WR841N

action.js

// network scanner for TL-WR841N
const puppeteer = require('puppeteer'),
    fs = require("fs"),
    exec = require("child_process").exec

//restart after an hour
setTimeout(_=>{
	process.exit(0);
}, 60*30*1000);

const log = input => {
	var today = new Date();
	var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
	var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
	var dateTime = date+' '+time;
	console.log(dateTime+":");
	console.log(input);
} 

process.title = `Netlister`;

const host = "http://192.168.0.1";

let browser, user;

(async () => {
	
	//start
    log("[browser]getting ready...");
	
    browser = await puppeteer.launch({
        headless: true,
        ignoreHTTPSErrors: true
    });

    page = (await browser.pages())[0];

    await page.goto(host, {
        waitUntil: 'networkidle0'
    });

    {
		//login
		log("[page]logging in...");
		await page.type('#userName', 'admin');
		await page.type('#pcPassword', 'admin');
		await page.click('#loginBtn');
	}

    await page.evaluate((args) => {

        const fetchy = _ => fetch("http://192.168.0.1/cgi?5", {
            "headers": {
                "accept": "*/*",
                "accept-language": "de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7",
                "cache-control": "no-cache",
                "content-type": "text/plain",
                "pragma": "no-cache"
            },
            "referrer": "http://192.168.0.1/mainFrame.htm",
            "referrerPolicy": "no-referrer-when-downgrade",
            "body": "[LAN_HOST_ENTRY#0,0,0,0,0,0#0,0,0,0,0,0]0,4\r\nleaseTimeRemaining\r\nMACAddress\r\nhostName\r\nIPAddress\r\n",
            "method": "POST",
            "mode": "cors",
            "credentials": "include"
        }).then(res => res.text()).then(text => {

            const entries = [];
            const _entries = text.split("[");
            for (const key in _entries) {
                if (+key !== 0 && +key !== _entries.length - 1) {
                    const _entry = _entries[key];
                    const entry = {
                        id: +key
                        //[_entry.split("\n")[1].split("=")[0]] : _entry.split("\n")[1].split("=")[1],
                    }

                    for (const key in _entry.split("\n")) {
                        const line = _entry.split("\n")[+key];
                        if (+key !== 0)
                            entry[line.split("=")[0]] = line.split("=")[1];
                    }
                    entries.push(entry);
                }
            }
            window.entries = entries;

            setTimeout(fetchy, 4999);

        });
        fetchy();
    });
})();

{ //result
	let oldValue = "";
    const interval = setInterval(async _ => {
        try {
            if (page) {
                var ENTRIES = await ((await browser.pages())[0].evaluate(() => window.entries));
                if (ENTRIES && JSON.stringify(oldValue) !== JSON.stringify(ENTRIES)) {
					if(ENTRIES.length===0) process.exit(1);//broke
					//write to file
					fs.writeFile('entries.json', JSON.stringify(ENTRIES), err=> {
					  if (err) return console.log(err);
					  log("[File]writing values to file");
					  log(ENTRIES);
					  oldValue = Object.assign([], ENTRIES);
					});
                }
            }

        } catch (e) {
            console.error(e);
            log("[err]browser not ready yet");
        }

    }, 999);
}

{ //batch
    require('readline')
        .createInterface(process.stdin, process.stdout)
        .question("", _ => {
            process.exit();
        });
} { //handle events
    const handler = err => {
        err && log(`[bad error]${err}`);
        process.exit();
    }
    process.on('uncaughtException', handler);
    process.on('unhandledRejection', handler);
}
    });

    {
		//login
		console.log("[page]logging in...");
		await page.type('#userName', 'admin');
		await page.type('#pcPassword', 'admin');
		await page.click('#loginBtn');
	}

    await page.evaluate((args) => {

        const fetchy = _ => fetch("http://192.168.0.1/cgi?5", {
            "headers": {
                "accept": "*/*",
                "accept-language": "de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7",
                "cache-control": "no-cache",
                "content-type": "text/plain",
                "pragma": "no-cache"
            },
            "referrer": "http://192.168.0.1/mainFrame.htm",
            "referrerPolicy": "no-referrer-when-downgrade",
            "body": "[LAN_HOST_ENTRY#0,0,0,0,0,0#0,0,0,0,0,0]0,4\r\nleaseTimeRemaining\r\nMACAddress\r\nhostName\r\nIPAddress\r\n",
            "method": "POST",
            "mode": "cors",
            "credentials": "include"
        }).then(res => res.text()).then(text => {

            const entries = [];
            const _entries = text.split("[");
            for (const key in _entries) {
                if (+key !== 0 && +key !== _entries.length - 1) {
                    const _entry = _entries[key];
                    const entry = {
                        id: +key
                        //[_entry.split("\n")[1].split("=")[0]] : _entry.split("\n")[1].split("=")[1],
                    }

                    for (const key in _entry.split("\n")) {
                        const line = _entry.split("\n")[+key];
                        if (+key !== 0)
                            entry[line.split("=")[0]] = line.split("=")[1];
                    }
                    entries.push(entry);
                }
            }
            window.entries = entries;

            setTimeout(fetchy, 4999);

        });
        fetchy();
    });
})();

{ //result
	let oldValue = "";
    const interval = setInterval(async _ => {
        try {
            if (page) {
                var ENTRIES = await ((await browser.pages())[0].evaluate(() => window.entries));
                if (ENTRIES && JSON.stringify(oldValue) !== JSON.stringify(ENTRIES)) {
					//write to file
					fs.writeFile('entries.json', JSON.stringify(ENTRIES), err=> {
					  if (err) return console.log(err);
					  console.log("[File]writing values to file");
					  console.log(ENTRIES);
					  oldValue = Object.assign([], ENTRIES);
					});
                }
            }

        } catch (e) {
            console.error(e);
            console.log("[err]browser not ready yet");
        }

    }, 999);
}

{ //batch
    require('readline')
        .createInterface(process.stdin, process.stdout)
        .question("", _ => {
            process.exit();
        });
} { //handle events
    const handler = err => {
        err && console.log(`[bad error]${err}`);
        process.exit();
    }
    process.on('uncaughtException', handler);
    process.on('unhandledRejection', handler);
}