fix favicon-related bug

examples/cookie-sessions/index.js

@@ -16,9 +16,15 @@ app.use(cookieSession({ secret: 'manny is cool' }));
 app.use(count);
 
 // custom middleware
-function count(req, res) {
-  req.session.count = (req.session.count || 0) + 1
-  res.send('viewed ' + req.session.count + ' times\n')
+function count(req, res, next) {
+  // without this check, a request to /favicon that 
+  // is made by most browsers will also increment the counter
+  if (req.path.startsWith('/favicon.ico')) {
+    return next();
+  } else {
+    req.session.count = (req.session.count || 0) + 1;
+    res.send('viewed ' + req.session.count + ' times\n');
+  }
 }
 
 /* istanbul ignore next */