synchronous inflight accounting

lib/server.js

@@ -853,11 +853,15 @@ Server.prototype.toString = function toString() {
 Server.prototype._onRequest = function _onRequest(req, res) {
     var self = this;
 
+    // increment number of requests
+    self._inflightRequests++;
+
     // Give the earliest chain the earliest possible opportunity to process
     // this request before we do any work on it
     var earliestChain = self.earliestChain;
     for (var i = 0; i < earliestChain.length; i++) {
         if (earliestChain[i](req, res) === false) {
+            self._inflightRequests--;
             return;
         }
     }
@@ -866,15 +870,13 @@ Server.prototype._onRequest = function _onRequest(req, res) {
 
     // Skip Socket.io endpoints
     if (this.socketio && /^\/socket\.io.*/.test(req.url)) {
+        self._inflightRequests--;
         return;
     }
 
     // Decorate req and res objects
     self._setupRequest(req, res);
 
-    // increment number of requests
-    self._inflightRequests++;
-
     // Run in domain to catch async errors
     // It has significant negative performance impact
     // Warning: this feature depends on the deprecated domains module