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跟着施磊老师做C++项目，施磊老师_腾讯课堂 (qq.com)
一、基于muduo网络库开发服务器程序
- 组合TcpServer对象
- 创建EventLoop事件循环对象的指针
- 明确TcpServer构造函数需要什么参数,输出ChatServer的构造函数
- 在当前服务器类的构造函数当中,注册处理连接的回调函数和处理读写事件的回调函数
- 设置合适的服务端线程数量,muduo库会自己分配I/O线程和worker线程
- test.cpp
/*muduo网络库给用户提供了两个主要的类TcpServer: 用于编写服务器程序的TcpClient: 用于编写客户端程序的epoll + 线程池好处:能够把网络I/O的代码和业务代码区分开对于业务代码主要暴露两个:用户的连接和断开;用户的可读写事件告诉muduo库,你对哪些事件感兴趣,并且你给我提前注册一个回调函数,当这些事情发生时,我会通知你,你去做你的事情吧!
*/
#include <muduo/net/TcpServer.h>
#include <muduo/net/EventLoop.h>
#include <iostream>
#include <functional>
#include <string>using namespace std;
using namespace muduo;
using namespace muduo::net;
using namespace placeholders;
// 基于muduo网络库开发服务器程序
/*1.组合TcpServer对象2.创建EventLoop事件循环对象的指针3.明确TcpServer构造函数需要什么参数,输出ChatServer的构造函数4.在当前服务器类的构造函数当中,注册处理连接的回调函数和处理读写事件的回调函数5.设置合适的服务端线程数量,muduo库会自己分配I/O线程和worker线程
*/
class ChatServer {
public:// 初始化TcpServer loop:事件循环 listenAddr:IP+Port nameArg:服务器的名字ChatServer(EventLoop *loop, const InetAddress &listenAddr, const string &nameArg): m_server(loop, listenAddr, nameArg), m_loop(loop) {// 给服务器注册用户连接的创建和断开回调m_server.setConnectionCallback(std::bind(&ChatServer::onConnection, this, _1));// 给服务器注册用户读写事件回调m_server.setMessageCallback(std::bind(&ChatServer::onMessage, this, _1, _2, _3));// 设置服务器端的线程数量 1个I/O线程 3个worker线程m_server.setThreadNum(4);}// 开启事件循环void start() {m_server.start();}
private:// 专门处理用户的连接创建和断开 epoll listenfd acceptvoid onConnection(const TcpConnectionPtr &conn) {cout<<conn->peerAddress().toIpPort() <<" -> "<<conn->localAddress().toIpPort() <<" is ";if(conn->connected()) {cout<<"state:online"<<endl;}else {cout<<"state:offline"<<endl;conn->shutdown(); // close(fd)// m_loop->quit();}}// 专门处理用户的读写事件 conn连接/buf缓冲区/time接收到数据的时间信息void onMessage(const TcpConnectionPtr &conn, Buffer *buffer, Timestamp time) {string buf = buffer->retrieveAllAsString();cout<<"recv data:"<<buf<<" time:"<<time.toString()<<endl;conn->send(buf);}TcpServer m_server; // #1EventLoop *m_loop; // #2 epoll
};int main() {EventLoop loop; // epollInetAddress addr("127.0.0.1",6000);ChatServer server(&loop, addr, "ChatServer");server.start(); // listenfd epoll_ctl => epollloop.loop(); // epoll_wait以阻塞方式等待新用户连接,已连接用户的读写事件等return 0;
}- 生成server文件，注意muduo_net要在muduo_base前面，命令如下：
g++ test.cpp -o server -lmuduo_net -lmuduo_base -lpthread
二 注意：本文使用到了有关muduo的TcpServer.h中找到setConnectionCallback和setMessageCallback,点击跳转到有关connectionCallback的头文件中去
/// Set connection callback./// Not thread safe.void setConnectionCallback(const ConnectionCallback& cb){ connectionCallback_ = cb; }/// Set message callback./// Not thread safe.void setMessageCallback(const MessageCallback& cb){ messageCallback_ = cb; }有关muduo的Callbacks.h
typedef std::function<void (const TcpConnectionPtr&)> ConnectionCallback;// the data has been read to (buf, len)
typedef std::function<void (const TcpConnectionPtr&,Buffer*,Timestamp)> MessageCallback;找到对应的Callback，我们就可以知道回调函数的参数和返回类型了
// 专门处理用户的连接创建和断开 epoll listenfd acceptvoid onConnection(const TcpConnectionPtr &conn) {...}// 专门处理用户的读写事件 conn连接/buf缓冲区/time接收到数据的时间信息void onMessage(const TcpConnectionPtr &conn, Buffer *buffer, Timestamp time) {...}我的往期文章：
在windows和Linux中的安装 boost 以及 安装 muduo-CSDN博客
https://blog.csdn.net/weixin_41987016/article/details/135963909?spm=1001.2014.3001.5501
三、vscode实现一键运行server
tasks.json
{"version": "2.0.0","tasks": [{"type": "cppbuild","label": "C/C++: g++ 生成活动文件","command": "/usr/bin/g++","args": ["-fdiagnostics-color=always","-g","-o","${workspaceFolder}/bin/app",// "${fileDirName}/${fileBasenameNoExtension}",// "-lmuduo_net",// "-lmuduo_base",// "-lpthread"],"options": {"cwd": "${workspaceFolder}"},"problemMatcher": ["$gcc"],"group": {"kind": "build","isDefault": true},"detail": "编译器: /usr/bin/g++"}]
}- launch.json
{// 使用 IntelliSense 了解相关属性。 // 悬停以查看现有属性的描述。// 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387"version": "0.2.0","configurations": [{"name": "(gdb) 启动","type": "cppdbg","request": "launch","program": "${workspaceFolder}/bin/app","args": [],"stopAtEntry": false,"cwd": "${fileDirname}","environment": [],"externalConsole": false,"MIMode": "gdb","setupCommands": [{"description": "为 gdb 启用整齐打印","text": "-enable-pretty-printing","ignoreFailures": true},{"description": "将反汇编风格设置为 Intel","text": "-gdb-set disassembly-flavor intel","ignoreFailures": true}]}]
}- CMakeLists.txt
cmake_minimum_required(VERSION 3.28.0)
project(test)
add_executable(server test.cpp)set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
target_link_libraries(server -lmuduo_net -lmuduo_base -lpthread) cmake -B build
cmake --build build
二、CMake构建项目
testmuduo存放CMakeLists.txt和test.cpp
- CMakeLists.txt
cmake_minimum_required(VERSION 3.28.0)
project(test)# 配置头文件搜索路径
# include_directories()
# 配置库文件搜索路径
# link_directories()
# 设置需要编译的源文件列表
set(SRC_LIST test.cpp)
# 把.指定路径下的所有源文件名字放入变量名SRC_LIST里面
# aux_source_directory(. SRC_LIST)# 生成可执行文件server,由SRC_LIST变量所定义的源文件编译生成
add_executable(server ${SRC_LIST})message("打印一下bin目录：" ${BIN})
# 设置可执行文件的存放路径
set(EXECUTABLE_OUTPUT_PATH ${BIN})# 表示server这个目标程序，需要链接这三个muduo_net muduo_base pthread库文件
# target_link_libraries(server -lmuduo_net -lmuduo_base -lpthread)
target_link_libraries(server muduo_net muduo_base pthread) 与testmuduo文件夹同目录的CMakeLists.txt
- CMakeLists.txt
cmake_minimum_required(VERSION 3.28.0)
project(test_project)set(BIN ${PROJECT_SOURCE_DIR}/bin)# # 配置编译选项
# set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} -g)# 指定搜索的子目录
add_subdirectory(testmuduo)
在此终端执行命令：
cmake -B build
cmake --build build