var possibly_wakeup_clients = function() {
for (var i in sleeping_clients) {
clearTimeout(sleeping_clients[i].timer);
+ mark_recently_seen(sleeping_clients[request_id].unique);
send_json(sleeping_clients[i].response, sleeping_clients[i].accept_gzip);
}
sleeping_clients = {};
response.end();
}
var timeout_client = function(client) {
+ mark_recently_seen(client.unique);
send_json(client.response, client.accept_gzip);
delete sleeping_clients[client.request_id];
}
+var mark_recently_seen = function(unique) {
+ if (unique) {
+ last_seen_clients[unique] = (new Date).getTime();
+ }
+}
var count_viewers = function() {
var now = (new Date).getTime();
var new_last_seen_clients = {};
var num_viewers = 0;
for (var unique in last_seen_clients) {
- if (now - last_seen_clients[unique] < 60000) {
+ if (now - last_seen_clients[unique] < 5000) {
++num_viewers;
new_last_seen_clients[unique] = last_seen_clients[unique];
}
}
+
+ // Also add sleeping clients that we would otherwise assume timed out.
+ for (var request_id in sleeping_clients) {
+ var unique = sleeping_clients[request_id].unique;
+ if (unique && !(unique in new_last_seen_clients)) {
+ ++num_viewers;
+ }
+ }
+
last_seen_clients = new_last_seen_clients;
return num_viewers;
}
return;
}
- if (unique) {
- last_seen_clients[unique] = (new Date).getTime();
- }
+ mark_recently_seen(unique);
var accept_encoding = request.headers['accept-encoding'];
var accept_gzip;
client.timer = setTimeout(function() { timeout_client(client); }, 30000);
client.request_id = request_id;
client.accept_gzip = accept_gzip;
+ client.unique = unique;
sleeping_clients[request_id++] = client;
}).listen(5000);