expresscpp/example/error_handler.cpp at master · expresscpp/expresscpp · GitHub

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#include "expresscpp/console.hpp"

#include "expresscpp/expresscpp.hpp"

using namespace expresscpp;

int main() {

ExpressCpp app;

auto ErrorMiddleware = [&](auto ec, auto /*req*/, auto res, auto /*next*/) {

std::cerr << "Internal Error: " << ec.message() << std::endl;

res->SetStatus(500);

res->Send("Internal Error");

};

app.Error(ErrorMiddleware);

struct User {

std::string name;

uint8_t age;

};

std::vector<User> users{{"john", 30}, {"steve", 40}};

app.Get("/users/:userId", [&](auto req, auto res, auto /*next*/) {

auto params = req->GetParams();

if ((params.find("userId") != params.end())) {

auto id = params.at("userId");

const int userId = std::stoi(id);

// ops, possible the user does not exist -> exception

auto user = users.at(userId);

res->Json(fmt::format("{{\"name\":\"{}\", \"age\":{}}}", user.name, user.age));

} else {

res->SetStatus(404);

res->Send(R"({"error":"user not found"})");

}

});

constexpr uint16_t port = 8081;

app.Listen(port,

[=](auto ec) {

if (ec) {

std::cerr << "ERROR: " << ec.message() << std::endl;

std::cerr << "exiting..." << std::endl;

exit(1);

}

std::cout << fmt::format(R"(you can try now (should work): "curl http://localhost:{}/users/0")", port)

<< std::endl;

std::cout << fmt::format(R"(and (should fail): "curl http://localhost:{}/users/10")", port) << std::endl;

})

.Run();

return 0;

}

expresscpp/example/error_handler.cpp at master · expresscpp/expresscpp · GitHub

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