1.muduo库简介

muduo是由Google大佬陈硕开发，是一个基于非阻塞IO和事件驱动的现代C++网络库，原生支持one loop per thread这种IO模型，该库只支持Linux系统，网上大佬对其褒贬不一，作为小白用来学习就无可厚非了。
git仓库:https://github.com/chenshuo/muduo

2.准备事项

1. muduo采用Cmake为build system，安装如下：

$ sudo apt-get install cmake

2. muduo依赖于Boost，安装如下：

$ sudo apt-get install libboost-dev libboost-test-dev

3. curl、c-ares DNS、Google Protobuf这3个库非必须安装，如果安装了cmake会多编译一些示例，安装如下：

$ sudo apt-get install libcur14-openssl-dev libc-ares-dev
$ sudo apt-get install protobuf-compiler libprotobuf-dev

3.编译

1. 下载muduo-master解压后，执行编译脚本

// 切换路径
$ cd muduo-master/
//编译muduo库，默认release版，生成build文件夹
$ ./build.sh -j2
// 将muduo头文件和库文件安装到release-install目录下的include和lib文件夹
$ ./build.sh install
// 将头文件拷贝到系统路径
$ cd build/release-install-cpp11/include/
$ cp -r muduo/ /usr/local/include/
// 将库文件拷贝到系统路径
$ cd build/release-install-cpp11/lib/
$ cp * /usr/local/lib/

4.测试demo

1. EchoServer.h

#include <muduo/net/TcpServer.h>
#include <muduo/base/Logging.h>


class EchoServer
{
    public:
        EchoServer(muduo::net::EventLoop* loop,
        const muduo::net::InetAddress& listenAddr);

        void start();

    private:
        void onConnection(const muduo::net::TcpConnectionPtr& conn);

        void onMessage(const muduo::net::TcpConnectionPtr& conn,
        muduo::net::Buffer* buf,
        muduo::Timestamp time);

        muduo::net::EventLoop* loop_;
        muduo::net::TcpServer server_;

};

2. EchoServer.cpp

#include "EchoServer.h"
#include <boost/bind/bind.hpp>

using namespace boost::placeholders;

EchoServer::EchoServer(muduo::net::EventLoop* loop,const muduo::net::InetAddress& listenAddr)
        :loop_(loop),
        server_(loop, listenAddr, "EchoServer")
        {
            server_.setConnectionCallback(
                boost::bind(&EchoServer::onConnection, this, _1));
            server_.setMessageCallback(
                boost::bind(&EchoServer::onMessage,  this, _1, _2, _3));
        }

void EchoServer::onConnection(const muduo::net::TcpConnectionPtr& conn)
{
    LOG_INFO << "EchoServer - " << conn->peerAddress().toIpPort() << " -> "
            << conn->localAddress().toIpPort() << " is "
            << (conn->connected()? "UP" : "DOWN");
}

void EchoServer::onMessage(const muduo::net::TcpConnectionPtr& conn,
        muduo::net::Buffer* buf,
        muduo::Timestamp time)
{
    muduo::string msg(buf->retrieveAllAsString());
    LOG_INFO << conn->name() << "echo - " << msg.size() << " bytes, "
            << " data received at " << time.toString();
    conn->send(msg);
}

void EchoServer::start()
{
        server_.start();
}

3. test.cpp

#include "EchoServer.h"

#include <muduo/net/EventLoop.h>
#include <muduo/base/Logging.h>

using namespace muduo;
using namespace muduo::net;

int main()
{
    LOG_INFO << "pid = "<< getpid();
    muduo::net::EventLoop loop;
    muduo::net::InetAddress listenAddr(2007);
    EchoServer server(&loop,listenAddr);
    server.start();
    loop.loop();
}

4. 在编译的时候出现好多未定义的错误，最后排查是因为编译的时候链接库的顺序有要求，编译如下：

$ g++ EchoServer.cpp test.cpp -o test -lmuduo_base -lmuduo_net -lpthread

错误消息如下：

5.测试

执行test.out程序启动服务端，再通过终端模拟客户端建立连接，在客户端发送消息会同时接收服务端回复的相同消息。