Initial commit

code/tcp_async_server.cpp

@@ -0,0 +1,56 @@
+#include <boost/asio.hpp>
+#include <iostream>
+#include <optional>
+
+class session: public std::enable_shared_from_this<session> {
+  public:
+    session(boost::asio::ip::tcp::socket&& socket) :
+        socket(std::move(socket)) {}
+
+    void start() {
+        boost::asio::async_read_until(
+            socket,
+            streambuf,
+            '\n',
+            [self = shared_from_this()](
+                boost::system::error_code error,
+                std::size_t bytes_transferred) {
+                std::cout << std::istream(&self->streambuf).rdbuf();
+            });
+    }
+
+  private:
+    boost::asio::ip::tcp::socket socket;
+    boost::asio::streambuf streambuf;
+};
+
+class server {
+  public:
+    server(boost::asio::io_context& io_context, std::uint16_t port) :
+        io_context(io_context),
+        acceptor(
+            io_context,
+            boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port)) {}
+
+    void async_accept() {
+        socket.emplace(io_context);
+
+        acceptor.async_accept(*socket, [&](boost::system::error_code error) {
+            std::make_shared<session>(std::move(*socket))->start();
+            async_accept();
+        });
+    }
+
+  private:
+    boost::asio::io_context& io_context;
+    boost::asio::ip::tcp::acceptor acceptor;
+    std::optional<boost::asio::ip::tcp::socket> socket;
+};
+
+int main() {
+    boost::asio::io_context io_context;
+    server srv(io_context, 15001);
+    srv.async_accept();
+    io_context.run();
+    return 0;
+}