// epoll2.cpp : 定义控制台应用程序的入口点。
//
//stl head
//包含hash_map 的头文件
//#include <map> //stl的map
using namespace std; //std 命名空间
using namespace __gnu_cxx; //而hash_map是在__gnu_cxx的命名空间里的
int init_thread_pool(int threadNum);
void *epoll_loop(void* para);
void *check_connect_timeout(void* para);
struct sockStruct
{
time_t time;
unsigned int* recvBuf;
};
//hash-map
//hash_map<int, unsigned int> sock_map;
hash_map<int, sockStruct> sock_map;
int fd_Setnonblocking(int fd)
{
int op;
op=fcntl(fd,F_GETFL,0);
fcntl(fd,F_SETFL,op|O_NONBLOCK);
return op;
}
void on_sigint(int signal)
{
exit(0);
}
/*
handle_message - 处理每个 socket 上的消息收发
*/
int handle_message(int new_fd)
{
char buf[MAXBUF + 1];
char sendbuf[MAXBUF+1];
int len;
/* 开始处理每个新连接上的数据收发 */
bzero(buf, MAXBUF + 1);
/* 接收客户端的消息 */
//len = recv(new_fd, buf, MAXBUF, 0);
int nRecvBuf = MAXRECVBUF; //设置为32K
setsockopt(new_fd, SOL_SOCKET, SO_RCVBUF, ( const char* )&nRecvBuf, sizeof(int));
len=recv(new_fd,&buf, MAXBUF,0);
//--------------------------------------------------------------------------------------------
//这块为了使用ab测试
char bufSend[1000] = {0};
sprintf(bufSend,"HTTP/1.0 200 OK\r\nContent-type: text/plain\r\n\r\n%s","Hello world!\n");
send(new_fd,bufSend,strlen(buf),0);
//--------------------------------------------------------------------------------------------
if (len > 0){
//printf ("%d接收消息成功:'%s'，共%d个字节的数据\n", new_fd, buf, len);
//hash-map
hash_map<int, sockStruct>::iterator it_find;
it_find = sock_map.find(new_fd);
if(it_find == sock_map.end()){
//新的网络连接，申请新的接收缓冲区，并放入map中
//printf("new socket %d\n", new_fd);
sockStruct newSockStruct;
newSockStruct.time = time((time_t*)0);
newSockStruct.recvBuf = (unsigned int*)malloc(1000);
memset(newSockStruct.recvBuf, 0, 1000);
strcat((char*)newSockStruct.recvBuf, buf);
sock_map.insert(pair<int,sockStruct>(new_fd, newSockStruct));
}else{
//网络连接已经存在，找到对应的数据缓冲区，将接收到的数据拼接到数据缓冲区中
//printf("socket %d exist!\n", it_find->first);
(it_find->second).time = time((time_t*)0); //时间更改
char* bufSockMap = (char*)(it_find->second).recvBuf; //数据存储
strcat(bufSockMap, buf);
//printf("bufSockMap:%s\n", bufSockMap);
}
}
else {
if (len < 0)
printf ("消息接收失败！错误代码是%d，错误信息是'%s'\n",
errno, strerror(errno));
else {
//将socket从map中移除
/*
hash_map<int, sockStruct>::iterator it_find;
it_find = sock_map.find(new_fd);
sock_map.erase(it_find);
*/
printf("client %d quit!\n",new_fd);
}
//close(new_fd);
return -1;
}
/* 处理每个新连接上的数据收发结束 */
//关闭socket的时候，要释放接收缓冲区。
hash_map<int, sockStruct>::iterator it_find;
it_find = sock_map.find(new_fd);
free((it_find->second).recvBuf);
sock_map.erase(it_find);
close(new_fd);
return len;
}
int listenfd;
int sock_op=1;
struct sockaddr_in address;
struct epoll_event event0;
struct epoll_event events[1024];
int epfd;
int n;
int i;
char buf[512];
int off;
int result;
char *p;
int main(int argc,char* argv[])
{
init_thread_pool(1);
signal(SIGPIPE,SIG_IGN);
signal(SIGCHLD,SIG_IGN);
signal(SIGINT,&on_sigint);
listenfd=socket(AF_INET,SOCK_STREAM,0);
setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&sock_op,sizeof(sock_op));
memset(&address,0,sizeof(address));
address.sin_addr.s_addr=htonl(INADDR_ANY);
address.sin_port=htons(8006);
bind(listenfd,(struct sockaddr*)&address,sizeof(address));
listen(listenfd,1024);
fd_Setnonblocking(listenfd);
epfd=epoll_create(65535);
memset(&event0,0,sizeof(event0));
event0.data.fd=listenfd;
event0.events=EPOLLIN|EPOLLET;
epoll_ctl(epfd,EPOLL_CTL_ADD,listenfd,&event0);
while(1){
sleep(1000);
}
return 0;
}
/*************************************************
* Function: * init_thread_pool
* Description: * 初始化线程
* Input: * threadNum:用于处理epoll的线程数
* Output: *
* Others: * 此函数为静态static函数,
*************************************************/
int init_thread_pool(int threadNum)
{
int i,ret;
pthread_t threadId;
//初始化epoll线程池
for ( i = 0; i < threadNum; i++)
{
ret = pthread_create(&threadId, 0, epoll_loop, (void *)0);
if (ret != 0)
{
printf("pthread create failed!\n");
return(-1);
}
}
ret = pthread_create(&threadId, 0, check_connect_timeout, (void *)0);
return(0);
}
/*************************************************
* Function: * epoll_loop
* Description: * epoll检测循环
* Input: *
* Output: *
* Others: *
*************************************************/
static int count111 = 0;
static time_t oldtime = 0, nowtime = 0;
void *epoll_loop(void* para)
{
while(1)
{
n=epoll_wait(epfd,events,4096,-1);
//printf("n = %d\n", n);
if(n>0)
{
for(i=0;i<n;++i)
{
if(events[i].data.fd==listenfd)
{
while(1)
{
event0.data.fd=accept(listenfd,NULL,NULL);
if(event0.data.fd>0)
{
fd_Setnonblocking(event0.data.fd);
event0.events=EPOLLIN|EPOLLET;
epoll_ctl(epfd,EPOLL_CTL_ADD,event0.data.fd,&event0);
}
else
{
if(errno==EAGAIN)
break;
}
}
}
else
{
if(events[i].events&EPOLLIN)
{
//handle_message(events[i].data.fd);
char recvBuf[1024] = {0};
int ret = 999;
int rs = 1;
while(rs)
{
ret = recv(events[n].data.fd,recvBuf,1024,0);// 接受客户端消息
if(ret < 0)
{
//由于是非阻塞的模式,所以当errno为EAGAIN时,表示当前缓冲区已无数据可//读在这里就当作是该次事件已处理过。
if(errno == EAGAIN)
{
printf("EAGAIN\n");
break;
}
else{
printf("recv error!\n");
epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, &event0);
close(events[i].data.fd);
break;
}
}
else if(ret == 0)
{
// 这里表示对端的socket已正常关闭.
rs = 0;
}
if(ret == sizeof(recvBuf))
rs = 1; // 需要再次读取
else
rs = 0;
}
if(ret>0){
count111 ++;
struct tm *today;
time_t ltime;
time( &nowtime );
if(nowtime != oldtime){
printf("%d\n", count111);
oldtime = nowtime;
count111 = 0;
}
char buf[1000] = {0};
sprintf(buf,"HTTP/1.0 200 OK\r\nContent-type: text/plain\r\n\r\n%s","Hello world!\n");
send(events[i].data.fd,buf,strlen(buf),0);
// CGelsServer Gelsserver;
// Gelsserver.handle_message(events[i].data.fd);
}
epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, &event0);
close(events[i].data.fd);
}
else if(events[i].events&EPOLLOUT)
{
sprintf(buf,"HTTP/1.0 200 OK\r\nContent-type: text/plain\r\n\r\n%s","Hello world!\n");
send(events[i].data.fd,buf,strlen(buf),0);
/*
if(p!=NULL)
{
free(p);
p=NULL;
}
*/
close(events[i].data.fd);
}
else
{
close(events[i].data.fd);
}
}
}
}
}
}
/*************************************************
* Function: * check_connect_timeout
* Description: * 检测长时间没反应的网络连接，并关闭删除
* Input: *
* Output: *
* Others: *
*************************************************/
void *check_connect_timeout(void* para)
{
hash_map<int, sockStruct>::iterator it_find;
for(it_find = sock_map.begin(); it_find!=sock_map.end(); ++it_find){
if( time((time_t*)0) - (it_find->second).time > 120){ //时间更改
free((it_find->second).recvBuf);
sock_map.erase(it_find);
close(it_find->first);
}
}
}
代码是在vs2017下建立linux工程编译的，编译的时候加入一个pthread多线程的库
