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88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
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*
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* Distributed under the Boost Software License, Version 1.0. (See
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* accompanying file LICENSE.txt)
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*/
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#include <queue>
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#include <vector>
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#include <string>
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#include <iostream>
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#include <boost/asio.hpp>
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#include <aedis/aedis.hpp>
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#include <aedis/src.hpp>
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namespace net = boost::asio;
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using aedis::resp3::node;
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using aedis::adapter::adapt;
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using aedis::generic::request;
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using aedis::redis::command;
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using response_type = std::vector<aedis::resp3::node<std::string>>;
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using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
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using tcp_acceptor = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::acceptor>;
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using connection = aedis::generic::connection<command>;
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net::awaitable<void>
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echo_loop(
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tcp_socket socket,
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std::shared_ptr<connection> db,
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std::shared_ptr<response_type> resp)
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{
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try {
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std::string msg;
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for (auto dbuffer = net::dynamic_buffer(msg, 1024);;) {
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auto const n = co_await net::async_read_until(socket, dbuffer, "\n");
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request<command> req;
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req.push(command::incr, "echo-server-counter");
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req.push(command::set, "echo-server-key", msg);
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req.push(command::get, "echo-server-key");
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co_await db->async_exec(req, adapt(*resp), net::use_awaitable);
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resp->at(0).value += ": ";
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resp->at(0).value += resp->at(2).value;
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co_await net::async_write(socket, net::buffer(resp->at(0).value));
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resp->clear();
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dbuffer.consume(n);
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}
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} catch (std::exception const& e) {
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std::cout << "Error: " << e.what() << std::endl;
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}
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}
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net::awaitable<void>
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listener(
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std::shared_ptr<tcp_acceptor> acc,
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std::shared_ptr<connection> db)
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{
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auto ex = co_await net::this_coro::executor;
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auto resp = std::make_shared<response_type>();
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for (;;) {
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auto socket = co_await acc->async_accept();
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net::co_spawn(ex, echo_loop(std::move(socket), db, resp), net::detached);
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}
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}
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auto handler =[](auto ec, auto...)
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{ std::cout << ec.message() << std::endl; };
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int main()
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{
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try {
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net::io_context ioc;
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// Redis client.
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auto db = std::make_shared<connection>(ioc);
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db->async_run(handler);
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// TCP acceptor.
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auto endpoint = net::ip::tcp::endpoint{net::ip::tcp::v4(), 55555};
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auto acc = std::make_shared<tcp_acceptor>(ioc, endpoint);
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co_spawn(ioc, listener(acc, db), net::detached);
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ioc.run();
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} catch (std::exception const& e) {
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std::cerr << e.what() << std::endl;
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}
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}
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