Add up path

DOCUMENTATION.md

@@ -79,7 +79,7 @@ Sample response
 }
 ```
 
-Special formatted responses
+Special formatted responses and aliases
 ===========================
 
 [GET] /uptime
@@ -113,3 +113,9 @@ Sample response
 ---------------
 
 * Returns redirect to /proc/sys/kernel/hostname
+
+[GET] /up
+---------
+
+* Always returns a 200 OK
+* Can be used for testing latency

src/routes.cpp

@@ -102,6 +102,12 @@ void setRoutes(crow::SimpleApp& app){
         return ret;
     });
 
+    CROW_ROUTE(app, "/up")([](){
+        crow::json::wvalue ret;
+        ret["message"] = "Alive and well!";
+        return ret;
+    });
+
     //catchall route
     CROW_CATCHALL_ROUTE(app)([](){
         crow::json::wvalue ret;