Crow/examples/example_json_map.cpp

#define CROW_JSON_USE_MAP
#include "crow.h"

int main()
{
    crow::SimpleApp app;

// simple json response using a map
// To see it in action enter {ip}:18080/json
// it shoud show amessage before zmessage despite adding zmessage first.
CROW_ROUTE(app, "/json")
([]{
    crow::json::wvalue x({{"zmessage", "Hello, World!"},
                          {"amessage", "Hello, World2!"}});
    return x;
});

app.port(18080)
    .multithreaded()
    .run();
}