user5209761 user5209761 - 1 year ago 70
jQuery Question

browsers fetches JSON file from cache

I am loading live map using json file but when i login the page some time it loads the json file from server n show the live map location. But sometime it not load the json file it takes the data from catche file n because of catche file i unable to show the live location. Please help me what to do

Thanks in advance

This is the code

$(document).ready(function() {


$.getJSON('json/<?php echo $vehicle_imei_no2;?>.json').done(function(json){

var lat_lng = new Array();
var path = new google.maps.MVCArray();
var poly = new google.maps.Polyline({ map: map, strokeColor: '#0000ff' });
service = new google.maps.DirectionsService();
directionsDisplay = new google.maps.DirectionsRenderer();

$.each(json, function(key, data) {
latLng = new google.maps.LatLng(, data.lng);
if( == '<?php echo $currentDate;?>'){
if(data.time >= '<?php echo $sessionTime; ?>'){

addMarker(latLng, map); //add new marker
}); //each

for (var i = 1; i < lat_lng.length; i++) {

var src = lat_lng[i];
var des = lat_lng[i + 1];
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.DRIVING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {


}); //getjson

}, 1000);//interval

function addMarker(location,map) {


Answer Source

Please provide more information to your question, such as where the JSON is being requested from, the code used to request the JSON and similar..

Anyway, a neat trick with fetching resources is to append a random query to the request with javascript or even from a server side rendering process..

is not the same as:

and should make a new request since that data has never been cached.

An example using jQuery (stated in comments):

$.getJSON('/data/map.json?' + (new Date().getTime()), ...)

using the Date will also ensure you never request the same random number.

I'd suggest you try to fix the issue on the server side of things..