目录
- 0.框架 && 前言
- 1.TcpServer类
-
- 2.HttpServer类
-
- 3.Request类 && Response类
- 1.功能
- 2.Request类设计
- 3.Response类设计
- 4.EndPoint类
-
- 5.Task类
-
- 6.ThreadPool类
-
0.框架 && 前言
1.TcpServer类
1.功能
- 主要负责底层的TCP通信
- 将其设计为单例模式,作为一个组件,置入HTTPServer中
2.类设计
static const uint16_t PORT = 8090;
static const int BACKLOG = 128;
class TcpServer
{
public:static TcpServer* GetInstance(uint16_t port = PORT){}void Init(){}void Socket(){}void Bind(){}void Listen(){}int Sock(){}~TcpServer(){}
private:TcpServer(uint16_t port): _port(port), _listenSock(-1){}TcpServer(const TcpServer&) = delete;
private:uint16_t _port;int _listenSock;static TcpServer* svr;
};TcpServer* TcpServer::svr = nullptr;
2.HttpServer类
1.功能
- 主要负责HTTP协议的通信
- 其中主要包括以下模块
- TcpServer
- ThreadPool
- TaskQueue
2.类设计
class HttpServer
{
public:HttpServer(int port = PORT): _port(port), _stop(false){}void Init(){}void Loop(int threadNum = THREAD_POOL_NUM){}
private:uint16_t _port;bool _stop;
};
3.Request类 && Response类
1.功能
- Request类负责存储接收到的请求及解析结果
- ReSponse类用来构建响应
2.Request类设计
struct HttpRequest
{std::string request_line;std::vector<std::string> request_header;std::string blank;std::string request_body;std::string method;std::string uri;std::string version;std::unordered_map<std::string, std::string> headerMap;size_t content_length;std::string path;std::string suffix;std::string arg;bool cgi;HttpRequest(): content_length(0), cgi(false){}
};
3.Response类设计
struct HttpResponse
{std::string status_line;std::vector<std::string> response_header;std::string blank;std::string response_body;int status_code;int fd;int fSize;HttpResponse(): status_code(OK), fd(-1), blank(LINE_END){}
};
4.EndPoint类
1.功能
- 负责两端业务处理,主要包括以下功能
- 读取请求、分析请求、构建响应、IO通信
- 该类为本项目主要设计方向
2.类设计
class EndPoint
{
public:EndPoint(int sock): _sock(sock), _stop(false){}~EndPoint(){}void RecvRequest(){}void BuildResponse(){}void SendResponse(){}bool IsStop(){}private:bool RecvRequestLine(){}bool RecvRequestHeader(){}void ParseRequestLine(){}void ParseRequestHeader(){}bool IsRecvRequestBody(){}bool RecvRequestBody(){}int ProcessNonCgi(){}int ProcessCgi(){}void BuildResponseHelper(){}void BuildOKResponse(){}void HandlerError(std::string page){}private:int _sock;bool _stop;HttpRequest _request;HttpResponse _response;
};
5.Task类
1.功能
- 将HTTP请求构建成一个任务,以便ThreadPool管理任务队列,一定程度上和ThreadPool一起缓解了服务器压力
2.类设计
class Task
{
public:void ProcessOn(){}Task(){}Task(int sock): _sock(sock){}~Task(){}
private:int _sock;CallBack _handler;
};
6.ThreadPool类
1.功能
- 线程池,分配任务给各线程,使其处理请求
- 主要解决问题:
- 大量链接过来导致服务器内部进程或者线程暴增,进而导致服务器效率严重降低或者挂掉
- 节省链接请求到来时,创建线程的时间成本
- 提前创建好了一批线程,来任务时处理任务,没有任务时,让线程休眠
- 让服务器的效率在一个恒定的稳定区间内
2.类设计
static const int THREAD_POOL_NUM = 10;
class ThreadPool
{
public:static ThreadPool *GetInstance(int num = THREAD_POOL_NUM){}static void *ThreadRoutine(void *args){}bool Init(){}void Push(const Task& task) {}void Pop(Task& task) {}void ThreadWait(){}void ThreadWakeUp(){}bool TaskQueueIsEmpty(){}void Lock(){}void Unlock(){}bool IsStop(){}~ThreadPool(){}
private:ThreadPool(int num = THREAD_POOL_NUM): _num(num), _stop(false){}ThreadPool(const ThreadPool &) = delete;
private:int _num;bool _stop;std::queue<Task> _taskQueue;pthread_mutex_t _mtx;pthread_cond_t _cond;static ThreadPool *_tp;
};ThreadPool* ThreadPool::_tp = nullptr;