1.muduo庫簡介

muduo是由Google大佬陳碩開發，是一個基于非阻塞IO和事件驅動的現代C++網絡庫，原生支持one loop per thread這種IO模型，該庫只支持Linux系統，網上大佬對其褒貶不一，作為小白用來學習就無可厚非了。
git倉庫:https://github.com/chenshuo/muduo

2.準備事項

1. muduo采用Cmake為build system，安裝如下：

$ sudo apt-get install cmake

2. muduo依賴于Boost，安裝如下：

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

3. curl、c-ares DNS、Google Protobuf這3個庫非必須安裝，如果安裝了cmake會多編譯一些示例，安裝如下：

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

3.編譯

1. 下載muduo-master解壓后，執行編譯腳本

// 切換路徑
$ cd muduo-master/
//編譯muduo庫，默認release版，生成build文件夾
$ ./build.sh -j2
// 將muduo頭文件和庫文件安裝到release-install目錄下的include和lib文件夾
$ ./build.sh install
// 將頭文件拷貝到系統路徑
$ cd build/release-install-cpp11/include/
$ cp -r muduo/ /usr/local/include/
// 將庫文件拷貝到系統路徑
$ cd build/release-install-cpp11/lib/
$ cp * /usr/local/lib/

4.測試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. 在編譯的時候出現好多未定義的錯誤，最后排查是因為編譯的時候鏈接庫的順序有要求，編譯如下：

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

錯誤消息如下：

5.測試

執行test.out程序啟動服務端，再通過終端模擬客戶端建立連接，在客戶端發送消息會同時接收服務端回復的相同消息。