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webserver.cpp
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webserver.cpp
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#include "webserver.h"
// 构造函数
WebServer::WebServer()
{
// http_conn类对象
users = new http_conn[MAX_FD];
// root文件夹路径
char server_path[200];
// 将当前工作目录的绝对路径写入server_path
getcwd(server_path, 200);
char root[6] = "/root";
// 分配根目录空间
m_root = (char *)malloc(strlen(server_path) + strlen(root) + 1);
strcpy(m_root, server_path);
strcat(m_root, root);
// 定时器
users_timer = new client_data[MAX_FD];
}
// 析构函数
WebServer::~WebServer()
{
// 回收文件描述符和管道
close(m_epollfd);
close(m_listenfd);
close(m_pipefd[1]);
close(m_pipefd[0]);
delete[] users;
delete[] users_timer;
delete m_pool;
}
// 初始化
void WebServer::init(int port, string user, string passWord, string databaseName, int log_write,
int opt_linger, int trigmode, int sql_num, int thread_num, int close_log, int actor_model, int timer_model)
{
// 端口
m_port = port;
// 用户名
m_user = user;
// 密码
m_passWord = passWord;
// 数据库名
m_databaseName = databaseName;
// 数据库连接数量
m_sql_num = sql_num;
// 线程数量
m_thread_num = thread_num;
// 日志写入方式:0同步、1异步
m_log_write = log_write;
// 优雅关闭连接
m_OPT_LINGER = opt_linger;
// 4种触发模式
m_TRIGMode = trigmode;
// 关闭log
m_close_log = close_log;
// 反应堆模型
m_actormodel = actor_model;
// 计时器模型
m_timer_model = timer_model;
}
// 配置触发模式
void WebServer::trig_mode()
{
// LT + LT
if (0 == m_TRIGMode)
{
m_LISTENTrigmode = 0;
m_CONNTrigmode = 0;
}
// LT + ET
else if (1 == m_TRIGMode)
{
m_LISTENTrigmode = 0;
m_CONNTrigmode = 1;
}
// ET + LT
else if (2 == m_TRIGMode)
{
m_LISTENTrigmode = 1;
m_CONNTrigmode = 0;
}
// ET + ET
else if (3 == m_TRIGMode)
{
m_LISTENTrigmode = 1;
m_CONNTrigmode = 1;
}
}
// 日志写入方式
void WebServer::log_write()
{
// 同步写入
if (0 == m_close_log)
{
// 初始化日志
if (1 == m_log_write)
Log::get_instance()->init("./ServerLog", m_close_log, 2000, 800000, 800);
else
Log::get_instance()->init("./ServerLog", m_close_log, 2000, 800000, 0);
}
}
// 初始化数据库连接池
void WebServer::sql_pool()
{
// 初始化数据库连接池
m_connPool = connection_pool::GetInstance();
m_connPool->init("localhost", m_user, m_passWord, m_databaseName, 3306, m_sql_num, m_close_log);
// 初始化数据库读取表
users->initmysql_result(m_connPool);
}
// 初始化线程池
void WebServer::thread_pool()
{
// 线程池
m_pool = new threadpool<http_conn>(m_actormodel, m_connPool, m_thread_num);
}
// 事件监听
void WebServer::eventListen()
{
// 网络编程基础步骤
m_listenfd = socket(PF_INET, SOCK_STREAM, 0);
assert(m_listenfd >= 0);
// 优雅关闭连接
if (0 == m_OPT_LINGER)
{
// 01默认关闭方式,SO_LINGER无效,剩余数据转交TCP模块
struct linger tmp = {0, 1};
// SO_LINGER表示若有数据传输则延迟关闭
setsockopt(m_listenfd, SOL_SOCKET, SO_LINGER, &tmp, sizeof(tmp));
}
else if (1 == m_OPT_LINGER)
{
// 11优雅关闭,根据残留数据和阻塞方式优雅关闭
struct linger tmp = {1, 1};
setsockopt(m_listenfd, SOL_SOCKET, SO_LINGER, &tmp, sizeof(tmp));
}
// 处理地址
int ret = 0;
struct sockaddr_in address;
bzero(&address, sizeof(address));
address.sin_family = AF_INET;
address.sin_addr.s_addr = htonl(INADDR_ANY);
address.sin_port = htons(m_port);
// 标志位
int flag = 1;
// SO_REUSEADDR:重用本地地址
setsockopt(m_listenfd, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(flag));
// 绑定地址和fd,设置监听参数
ret = bind(m_listenfd, (struct sockaddr *)&address, sizeof(address));
assert(ret >= 0);
ret = listen(m_listenfd, 5);
assert(ret >= 0);
// 初始化计时器
utils.init(TIMESLOT);
// epoll创建内核事件表
epoll_event events[MAX_EVENT_NUMBER];
m_epollfd = epoll_create(5);
assert(m_epollfd != -1);
// 向内核事件表种注册可读事件,LT模式,选择开启one shot
utils.addfd(m_epollfd, m_listenfd, false, m_LISTENTrigmode);
// 最大fd个数
http_conn::m_epollfd = m_epollfd;
// 双向管道
ret = socketpair(PF_UNIX, SOCK_STREAM, 0, m_pipefd);
assert(ret != -1);
utils.setnonblocking(m_pipefd[1]);
utils.addfd(m_epollfd, m_pipefd[0], false, 0);
// 添加信号:管道、定时器到期、中断
utils.addsig(SIGPIPE, SIG_IGN);
utils.addsig(SIGALRM, utils.sig_handler, false);
utils.addsig(SIGTERM, utils.sig_handler, false);
// TIMESLOT时间后发送sigalrm信号
alarm(TIMESLOT);
// 工具类,信号和描述符基础操作
Utils::u_pipefd = m_pipefd;
Utils::u_epollfd = m_epollfd;
}
// 初始化connfd的计时器
void WebServer::timer(int connfd, struct sockaddr_in client_address)
{
// 初始化http连接
users[connfd].init(connfd, client_address, m_root, m_CONNTrigmode, m_close_log, m_user, m_passWord, m_databaseName);
// 初始化client_data数据
// 创建定时器,设置回调函数和超时时间,绑定用户数据,将定时器添加到链表中
users_timer[connfd].address = client_address;
users_timer[connfd].sockfd = connfd;
if (m_timer_model == 0)
{
util_lst_timer *timer = new util_lst_timer;
timer->user_data = &users_timer[connfd];
timer->cb_func = cb_func; // 关闭连接函数
time_t cur = time(NULL); // 计时
timer->expire = cur + 3 * TIMESLOT; // 超时时刻
users_timer[connfd].lst_timer = timer; // 存储计时器
utils.m_timer_lst.add_timer(timer); // 插入升序链表计时器
}
else
{
util_heap_timer *timer = new util_heap_timer;
timer->user_data = &users_timer[connfd];
timer->cb_func = cb_func; // 关闭连接函数
time_t cur = time(NULL); // 计时
timer->expire = cur + 3 * TIMESLOT; // 超时时刻
users_timer[connfd].heap_timer = timer; // 存储计时器
utils.m_timer_heap.add_timer(timer); // 插入升序链表计时器
}
}
// 若有数据传输,则将定时器往后延迟3个单位
// 并对新的定时器在链表上的位置进行调整
void WebServer::adjust_timer(util_heap_timer *timer)
{
time_t cur = time(NULL);
timer->expire = cur + 3 * TIMESLOT;
utils.m_timer_heap.adjust_timer(timer);
LOG_INFO("%s", "adjust timer once");
}
// 重载
void WebServer::adjust_timer(util_lst_timer *timer)
{
time_t cur = time(NULL);
timer->expire = cur + 3 * TIMESLOT;
utils.m_timer_lst.adjust_timer(timer);
LOG_INFO("%s", "adjust timer once");
}
// 后处理计时器
void WebServer::deal_timer(util_heap_timer *timer, int sockfd)
{
timer->cb_func(&users_timer[sockfd]);
if (timer)
{
utils.m_timer_heap.del_timer(timer);
}
LOG_INFO("close fd %d", users_timer[sockfd].sockfd);
}
// 重载
void WebServer::deal_timer(util_lst_timer *timer, int sockfd)
{
timer->cb_func(&users_timer[sockfd]);
if (timer)
{
utils.m_timer_lst.del_timer(timer);
}
LOG_INFO("close fd %d", users_timer[sockfd].sockfd);
}
// 接收连接,处理用户数据
bool WebServer::dealclinetdata()
{
struct sockaddr_in client_address;
socklen_t client_addrlength = sizeof(client_address);
// LT+LT
if (0 == m_LISTENTrigmode)
{
int connfd = accept(m_listenfd, (struct sockaddr *)&client_address, &client_addrlength);
if (connfd < 0)
{
LOG_ERROR("%s:errno is:%d", "accept error", errno);
return false;
}
// 超出上限
if (http_conn::m_user_count >= MAX_FD)
{
utils.show_error(connfd, "Internal server busy");
LOG_ERROR("%s", "Internal server busy");
return false;
}
timer(connfd, client_address);
}
// 其他触发模式
else
{
while (1)
{
int connfd = accept(m_listenfd, (struct sockaddr *)&client_address, &client_addrlength);
if (connfd < 0)
{
LOG_ERROR("%s:errno is:%d", "accept error", errno);
break;
}
if (http_conn::m_user_count >= MAX_FD)
{
utils.show_error(connfd, "Internal server busy");
LOG_ERROR("%s", "Internal server busy");
break;
}
timer(connfd, client_address);
}
return false;
}
return true;
}
// 处理信号
bool WebServer::dealwithsignal(bool &timeout, bool &stop_server)
{
int ret = 0;
int sig;
char signals[1024];
// 接收管道中的信号
ret = recv(m_pipefd[0], signals, sizeof(signals), 0);
if (ret == -1)
{
return false;
}
else if (ret == 0)
{
return false;
}
else
{
for (int i = 0; i < ret; ++i)
{
switch (signals[i])
{
case SIGALRM:
{
timeout = true;
break;
}
case SIGTERM:
{
stop_server = true;
break;
}
}
}
}
return true;
}
// 处理读
void WebServer::dealwithread(int sockfd)
{
util_lst_timer *lst_timer = nullptr;
util_heap_timer *heap_timer = nullptr;
if (m_timer_model == 0)
lst_timer = users_timer[sockfd].lst_timer;
else
heap_timer = users_timer[sockfd].heap_timer;
// reactor
if (1 == m_actormodel)
{
if (m_timer_model == 0)
{
if (lst_timer)
adjust_timer(lst_timer);
}
else
{
if (heap_timer)
adjust_timer(heap_timer);
}
// 若监测到读事件,将该事件放入请求队列
m_pool->append(users + sockfd, 0);
while (true)
{
if (1 == users[sockfd].improv)
{
if (1 == users[sockfd].timer_flag)
{
if (m_timer_model == 0)
deal_timer(lst_timer, sockfd);
else
deal_timer(heap_timer, sockfd);
users[sockfd].timer_flag = 0;
}
users[sockfd].improv = 0;
break;
}
}
}
else
{
// proactor
if (users[sockfd].read_once())
{
LOG_INFO("deal with the client(%s)", inet_ntoa(users[sockfd].get_address()->sin_addr));
// 若监测到读事件,将该事件放入请求队列
m_pool->append_p(users + sockfd);
if (m_timer_model == 0)
{
if (lst_timer)
adjust_timer(lst_timer);
}
else
{
if (heap_timer)
adjust_timer(heap_timer);
}
}
else
{
if (m_timer_model == 0)
deal_timer(lst_timer, sockfd);
else
deal_timer(heap_timer, sockfd);
}
}
}
// 处理写
void WebServer::dealwithwrite(int sockfd)
{
util_lst_timer *lst_timer = nullptr;
util_heap_timer *heap_timer = nullptr;
if (m_timer_model == 0)
lst_timer = users_timer[sockfd].lst_timer;
else
heap_timer = users_timer[sockfd].heap_timer;
// reactor
if (1 == m_actormodel)
{
if (m_timer_model == 0)
{
if (lst_timer)
adjust_timer(lst_timer);
}
else
{
if (heap_timer)
adjust_timer(heap_timer);
}
m_pool->append(users + sockfd, 1);
while (true)
{
if (1 == users[sockfd].improv)
{
if (1 == users[sockfd].timer_flag)
{
if (m_timer_model == 0)
deal_timer(lst_timer, sockfd);
else
deal_timer(heap_timer, sockfd);
users[sockfd].timer_flag = 0;
}
users[sockfd].improv = 0;
break;
}
}
}
else
{
// proactor
if (users[sockfd].write())
{
LOG_INFO("send data to the client(%s)", inet_ntoa(users[sockfd].get_address()->sin_addr));
if (m_timer_model == 0)
{
if (lst_timer)
adjust_timer(lst_timer);
}
else
{
if (heap_timer)
adjust_timer(heap_timer);
}
}
else
{
if (m_timer_model == 0)
deal_timer(lst_timer, sockfd);
else
deal_timer(heap_timer, sockfd);
}
}
}
// 阻塞监听事件
void WebServer::eventLoop()
{
bool timeout = false;
bool stop_server = false;
while (!stop_server)
{
// 获取事件个数
int number = epoll_wait(m_epollfd, events, MAX_EVENT_NUMBER, -1);
if (number < 0 && errno != EINTR)
{
LOG_ERROR("%s", "epoll failure");
break;
}
// 轮询
for (int i = 0; i < number; i++)
{
int sockfd = events[i].data.fd;
// 处理新到的客户连接
if (sockfd == m_listenfd)
{
bool flag = dealclinetdata();
if (false == flag)
continue;
}
else if (events[i].events & (EPOLLRDHUP | EPOLLHUP | EPOLLERR))
{
// 服务器端关闭连接,移除对应的定时器
if(m_timer_model == 0) {
util_lst_timer * lst_timer = users_timer[sockfd].lst_timer;
deal_timer(lst_timer, sockfd);
}
else {
util_heap_timer * heap_timer = users_timer[sockfd].heap_timer;
deal_timer(heap_timer, sockfd);
}
}
// 处理信号
else if ((sockfd == m_pipefd[0]) && (events[i].events & EPOLLIN))
{
bool flag = dealwithsignal(timeout, stop_server);
if (false == flag)
LOG_ERROR("%s", "dealclientdata failure");
}
// 处理客户连接上接收到的数据
else if (events[i].events & EPOLLIN)
{
dealwithread(sockfd);
}
else if (events[i].events & EPOLLOUT)
{
dealwithwrite(sockfd);
}
}
// 处理超时
if (timeout)
{
utils.timer_handler(m_timer_model);
LOG_INFO("%s", "timer tick");
timeout = false;
}
}
}