src/main.cpp


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#include <iostream>

#include "crow.h"

int main() {
    crow::SimpleApp app;

    CROW_ROUTE(app, "/add_json")
            .methods("POST"_method)
                    ([](crow::request const &request) {
                        auto data = crow::json::load(request.body);
                        if (!data)
                            return crow::response(400);
                        auto sum = data["a"].i() + data["b"].i();
                        std::ostringstream os;
                        os << sum;
                        return crow::response{os.str()};
                    });

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

    std::cout << "Hello, World\n" << std::endl;
}

// curl -d '{"a":"5", "b":"12"}' -H "Content-Type: application/json" -X POST http://localhost:18080/add_json