source: trunk/admin/themes/default/js/jquery.geoip.js @ 22703

GeoIp = {
        cache: {},
        pending: {},
        
        get: function(ip, callback){
                if (!GeoIp.storageInit && window.localStorage) {
                        GeoIp.storageInit = true;
                        var cache = localStorage.getItem("freegeoip");
                        if (cache) {
                                cache = JSON.parse(cache);
                                for (var key in cache) {
                                        var data = cache[key];
                                        if ( (new Date()).getTime() - data.reqTime > 36 * 3600000)
                                                delete cache[key];
                                }
                                GeoIp.cache = cache;
                        }
                        jQuery(window).on("unload", function() {
                                localStorage.setItem("freegeoip", JSON.stringify(GeoIp.cache) );
                        } );
                }

                if (GeoIp.cache.hasOwnProperty(ip))
                        callback(GeoIp.cache[ip]);
                else if (GeoIp.pending[ip])
                        GeoIp.pending[ip].push(callback);
                else {
                        GeoIp.pending[ip] = [callback];
                        jQuery.ajax( {
                                url: "http://freegeoip.net/json/" + ip,
                                dataType: "jsonp",
                                cache: true,
                                timeout: 5000,
                                success: function(data) {
                                        data.reqTime = (new Date()).getTime();
                                        var res=[];
                                        if (data.city) res.push(data.city);
                                        if (data.region_name) res.push(data.region_name);
                                        if (data.country_name) res.push(data.country_name);
                                        data.fullName = res.join(", ");

                                        GeoIp.cache[ip] = data;
                                        var callbacks = GeoIp.pending[ip];
                                        delete GeoIp.pending[ip];
                                        for (var i=0; i<callbacks.length; i++)
                                                callbacks[i].call(null, data);
                                },

                                error: function() {
                                        var data = {ip:ip, reqTime: (new Date()).getTime()};

                                        GeoIp.cache[ip] = data;
                                        var callbacks = GeoIp.pending[ip];
                                        delete GeoIp.pending[ip];
                                        for (var i=0; i<callbacks.length; i++)
                                                callbacks[i].call(null, data);
                                }
                        });
                }
        }
}