Question

我正在使用boost Asio进行一些测试，并且我不明白为什么不会调用async_write函数的处理程序（女巫是lambda函数）。

#include <iostream>
#include <boost/asio.hpp>
using namespace boost::asio;

int main() {
    io_service service;
    std::string str = std::string("HTTP/1.1 200 OK\r\n ......");

    ip::tcp::acceptor my_acceptor{ service, ip::tcp::endpoint(ip::tcp::v4(), 6767) };
    ip::tcp::socket my_socket{ service };
    my_acceptor.async_accept(my_socket, [&my_socket, str](boost::system::error_code) {
        std::cout << "connected " << std::endl;

        async_write(my_socket, boost::asio::buffer(str), [&my_socket](boost::system::error_code, std::size_t) {
            std::cout << "Data written" << std::endl;

        });

    });

    service.run();
}

＆＃34;写入数据＆＃34;永远不会出现，并且消息不会发送到客户端这段代码有什么问题？

Answer 1

代码运行正常。

您是否正在以足够的权限运行以侦听端口80？

你确定没有其他人在那里听吗？

尝试

在不同的端口上运行（例如，6767而不是80）
打印//Input events, hot observable var source = Observable.Interval(TimeSpan.FromSeconds(1)) .Select(i => i.ToString()) .Publish().RefCount(); //Simulate pausing from Keyboard, not actually relevant within this answer var pauseObservable = Observable.FromEventPattern<KeyPressEventHandler, KeyPressEventArgs>( k => KeyPressed += k, k => KeyPressed -= k) .Select(i => i.EventArgs.PressedKey) .Select(i => i == ConsoleKey.Spacebar) //space is pause, others are unpause .DistinctUntilChanged(); //Let events through when not paused var notPausedEvents = source.Zip(pauseObservable.MostRecent(false), (value, paused) => new {value, paused}) .Where(i => !i.paused) //not paused .Select(i => i.value) .Subscribe(Console.WriteLine); //When paused, buffer until not paused var pausedEvents = pauseObservable.Where(i => i) .Subscribe(_ => source.BufferUntil(pauseObservable.Where(i => !i)) .Select(i => String.Join(Environment.NewLine, i)) .Subscribe(Console.WriteLine));

E.g。

cursor.close()

asio程序退出完成async_write

1 个答案: