Get Cloudflare's HTTP_CF_IPCOUNTRY header with javascript?

Question

There are many SO questions how to get http headers with javascript, but for some reason they don\'t show up HTTP_CF_IPCOUNTRY header.

If I try to do with php echo

Answer 1

I've taken Don Omondi's answer, and converted it to a promise function for ease of use.

function get_country_code() {
    return new Promise((resolve, reject) => {
        var trace = []; 
        jQuery.ajax('/cdn-cgi/trace', {
            success: function(response) {
                var lines = response.split('\n');
                var keyValue;
                for (var index = 0; index < lines.length; index++) {
                    const line = lines[index];
                    keyValue = line.split('=');
                    trace[keyValue[0]] = decodeURIComponent(keyValue[1] || '');
                    if (keyValue[0] === 'loc' && trace['loc'] !== 'XX') {
                        return resolve(trace['loc']);
                    }
                }
            },
            error: function() {
                return reject(trace);
            }
        });

    });
}

usage example

get_country_code().then((country_code) => {
    // do something with the variable country_code
}).catch((err) => {
    // caught the error, now do something with it
});