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Copy pathexternal_event_loop.cpp
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88 lines (82 loc) · 3.36 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011-2026 Sebastiano Merlino
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the file
LICENSE in the distribution; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <chrono>
#include <cstdlib>
#include <iostream>
#include <optional>
#include <span>
#include <string>
#include <string_view>
#include <httpserver/server/server.hpp>
#include "./host_poll.hpp"
int main(int argc, char** argv) {
namespace srv = httpserver::server;
namespace http = httpserver::http;
// Optional seconds bounds a smoke invocation; ordinary hosting has
// no synthetic periodic timer and waits only for library deadlines.
std::optional<v3_host::clock_type::time_point> until;
if (argc > 1) {
const int seconds = std::atoi(argv[1]);
if (seconds <= 0) return 2;
until = v3_host::clock_type::now() + std::chrono::seconds(seconds);
}
srv::server_options options;
options.loop() = srv::loop_mode::external;
options.concurrency().workers = 2;
options.add_listener({"127.0.0.1", 0, false});
srv::native_server server(options);
auto configured = server.route_sync(http::method::known(http::method_id::get), "/hello",
[](const http::request_head&, std::span<const std::byte>) {
srv::sync_response response;
response.status = http::status::from_code(200);
constexpr std::string_view body = "hello from an external loop\n";
const auto* bytes = reinterpret_cast<const std::byte*>(body.data());
response.body.assign(bytes, bytes + body.size());
return response;
}, 1024);
if (!configured.ok()) return 1;
const auto listened = server.listen();
if (!listened.ok()) {
std::cerr << listened.message() << '\n';
return 1;
}
std::cout << "PORT=" << server.get_bound_port(0) << std::endl;
int status = 0;
try {
auto* driver = server.readiness();
auto snapshot = driver->interests();
while (server.is_running()) {
if (until && v3_host::clock_type::now() >= *until) break;
auto events = v3_host::wait(snapshot, until);
const auto result = driver->dispatch(events, v3_host::clock_type::now());
if (!result.ok()) {
std::cerr << result.message() << '\n';
status = 1;
break;
}
snapshot = driver->interests();
}
// poll registrations are local to wait(); none survive owner shutdown.
snapshot = {};
} catch (const std::exception& error) {
std::cerr << error.what() << '\n';
status = 1;
}
server.stop();
return status;
}