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 $_SERVER["HTTP_CF_IPCOUNTRY"];
, it works, so CF is working just fine.
Is it possible to get this header with javascript?
@Quentin's answer stands correct and holds true for any javascript client trying to access server header's.
However, since this question is specific to Cloudlfare and specific to getting the 2 letter country ISO normally in the HTTP_CF_IPCOUNTRY header, I believe I have a work-around that best befits the question asked.
Below is a code excerpt that I use on my frontend Ember App, sitting behind Cloudflare... and varnish... and fastboot...
function parseTrace(url){
let trace = [];
$.ajax(url,
{
success: function(response){
let lines = response.split('\n');
let keyValue;
lines.forEach(function(line){
keyValue = line.split('=');
trace[keyValue[0]] = decodeURIComponent(keyValue[1] || '');
if(keyValue[0] === 'loc' && trace['loc'] !== 'XX'){
alert(trace['loc']);
}
if(keyValue[0] === 'ip'){
alert(trace['ip']);
}
});
return trace;
},
error: function(){
return trace;
}
}
);
};
let cfTrace = parseTrace('/cdn-cgi/trace');
The performance is really really great, don't be afraid to call this function even before you call other APIs or functions. I have found it to be as quick or sometimes even quicker than retrieving static resources from Cloudflare's cache. You can run a profile on Pingdom to confirm this.