forked from Sithas/cpp_backend
147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
#include "src/sdk.h"
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//
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#include <boost/json.hpp>
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#include <boost/json/src.hpp>
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#include <boost/asio/signal_set.hpp>
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#include <iostream>
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#include <mutex>
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#include <thread>
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#include <vector>
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#include <fstream>
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#include "src/http_server.h"
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namespace
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{
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namespace net = boost::asio;
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using namespace std::literals;
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namespace sys = boost::system;
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namespace json = boost::json;
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namespace http = boost::beast::http;
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using namespace std;
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using net::ip::tcp;
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// Запрос, тело которого представлено в виде строки
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using StringRequest = http::request<http::string_body>;
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// Ответ, тело которого представлено в виде строки
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using StringResponse = http::response<http::string_body>;
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struct content_type
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{
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content_type() = delete;
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constexpr static std::string_view k_TextHTML = "text/html"sv;
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constexpr static std::string_view k_JSON = "application/json"sv;
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// При необходимости внутрь content_type можно добавить и другие типы контента
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};
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StringResponse HandleRequest(StringRequest&& req)
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{
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constexpr static string_view k_MapsPattern = "/api/v1/maps"sv;
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const auto route = req.target();
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if (equal(k_MapsPattern.begin(),
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k_MapsPattern.end(),
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route.begin(),
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route.end()))
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{
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ifstream stream("./config.json"s);
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string config;
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string buf;
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while (std::getline(stream, buf))
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{
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config += buf;
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}
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string_view config_ref {config.begin(), config.end()};
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auto parsed_config = json::parse(config_ref);
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StringResponse res(http::status::ok, 1);
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res.set(http::field::content_type, content_type::k_JSON);
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res.body() = json::serialize(parsed_config.as_object().at("maps"sv).as_array());
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res.content_length(res.body().size());
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res.keep_alive(true);
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return res;
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}
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else if (equal(k_MapsPattern.begin(),
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k_MapsPattern.end(),
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route.begin(),
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route.begin() + k_MapsPattern.size()))
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{
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}
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else
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{
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StringResponse res(http::status::bad_request, 1);
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res.set(http::field::content_type, content_type::k_JSON);
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string body = "{\n"
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" \"code\": \"badRequest\",\n"
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" \"message\": \"Bad request\"\n"
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"} "s;
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res.body() = body;
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res.content_length(body.size());
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res.keep_alive(true);
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return res;
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}
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}
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// Запускает функцию fn на n потоках, включая текущий
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template<typename Fn>
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void RunWorkers(unsigned n, const Fn& fn)
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{
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n = std::max(1u, n);
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std::vector<std::jthread> workers;
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workers.reserve(n - 1);
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// Запускаем n-1 рабочих потоков, выполняющих функцию fn
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while (--n)
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{
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workers.emplace_back(fn);
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}
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fn();
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}
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} // namespace
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int main()
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{
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const unsigned num_threads = std::thread::hardware_concurrency();
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net::io_context ioc(num_threads);
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tcp::acceptor acceptor(net::make_strand(ioc));
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// Подписываемся на сигналы и при их получении завершаем работу сервера
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net::signal_set signals(ioc, SIGINT, SIGTERM);
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signals.async_wait([&ioc](const sys::error_code& ec,
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[[maybe_unused]] int signal_number)
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{
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if (!ec)
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{
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cout << "Signal "sv << signal_number << " received"sv
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<< endl;
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ioc.stop();
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}
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});
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const auto address = net::ip::make_address("0.0.0.0");
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constexpr net::ip::port_type port = 8080;
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http_server::ServeHttp(ioc, {address, port}, [](auto&& req, auto&& sender)
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{
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sender(HandleRequest(std::forward<decltype(req)>(req)));
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});
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net::steady_timer t {ioc, 30s};
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t.async_wait([](sys::error_code ec)
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{
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cout << "Timer expired"sv << endl;
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});
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std::cout << "Server has started..."sv << std::endl;
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RunWorkers(num_threads, [&ioc]
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{
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ioc.run();
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});
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}
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