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test ping with javascript

mohammad pakravan answered on January 11, 2023 Popularity 8/10 Helpfulness 5/10

answer test ping with javascript

test ping with javascript

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function http_ping(fqdn) {

var NB_ITERATIONS = 4; // number of loop iterations
var MAX_ITERATIONS = 5; // beware: the number of simultaneous XMLHttpRequest is limited by the browser!
var TIME_PERIOD = 1000; // 1000 ms between each ping
var i = 0;
var over_flag = 0;
var time_cumul = 0;
var REQUEST_TIMEOUT = 9000;
var TIMEOUT_ERROR = 0;

document.getElementById('result').innerHTML = "HTTP ping for " + fqdn + "</br>";

var ping_loop = setInterval(function() {


        // let's change non-existent URL each time to avoid possible side effect with web proxy-cache software on the line
        url = "http://" + fqdn + "/a30Fkezt_77" + Math.random().toString(36).substring(7);

        if (i < MAX_ITERATIONS) {

            var ping = new XMLHttpRequest();

            i++;
            ping.seq = i;
            over_flag++;

            ping.date1 = Date.now();

            ping.timeout = REQUEST_TIMEOUT; // it could happen that the request takes a very long time

            ping.onreadystatechange = function() { // the request has returned something, let's log it (starting after the first one)

                if (ping.readyState == 4 && TIMEOUT_ERROR == 0) {

                    over_flag--;

                    if (ping.seq > 1) {
                        delta_time = Date.now() - ping.date1;
                        time_cumul += delta_time;
                        document.getElementById('result').innerHTML += "</br>http_seq=" + (ping.seq-1) + " time=" + delta_time + " ms</br>";
                    }
                }
            }


            ping.ontimeout = function() {
                TIMEOUT_ERROR = 1;
            }

            ping.open("GET", url, true);
            ping.send();

        }

        if ((i > NB_ITERATIONS) && (over_flag < 1)) { // all requests are passed and have returned

            clearInterval(ping_loop);
            var avg_time = Math.round(time_cumul / (i - 1));
            document.getElementById('result').innerHTML += "</br> Average ping latency on " + (i-1) + " iterations: " + avg_time + "ms </br>";

        }

        if (TIMEOUT_ERROR == 1) { // timeout: data cannot be accurate

            clearInterval(ping_loop);
            document.getElementById('result').innerHTML += "<br/> THERE WAS A TIMEOUT ERROR <br/>";
            return;

        }

    }, TIME_PERIOD);
}

Popularity 8/10 Helpfulness 5/10 Language javascript

Source: stackoverflow.com

Tags: javascript ping

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Contributed on Jan 11 2023

mohammad pakravan

0 Answers Avg Quality 2/10

test ping with javascript

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