Linux网络编程select模型的实现

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#define LISTENQ 5 
#define OPEN_MAX 1024
#define SERV_PORT  10088
#define MAX_LINE 1024
#define INFTIM -1 

#define MAXEVENTS 1000


	char szHtmlBuf[] = "HTTP/1.1 200 OK\r\n"
"Date: Sat, 05 Jan 2013 03:13:29 GMT\r\n"
"Vary: Accept-Encoding\r\n"
"Content-Type: text/html; charset=gb2312\r\n"
"Accept-Ranges: bytes\r\n"
"Content-Length: 57\r\n"
"\r\n"
" 欢迎光临 屌丝逆袭季";

fd_set fds;

void echo_srv(int clientFd)
{
	//处理用户请求数据
	char line[MAX_LINE];
	printf( "开始读取数据");
	int n = read(clientFd, line, sizeof(line));
	if(n < 0)
	{
		//#define ECONNRESET 104  /* Connection reset by peer */
		if(errno == ECONNRESET)
		{
			close(clientFd);
			FD_CLR(clientFd, &fds);
			printf("异常退出\n");
		}
		else
		{
				printf("网络异常");
				exit(-1);
		}
	}
	else if(n == 0)
	{
		close(clientFd);
		FD_CLR(clientFd, &fds);
		printf("正常退出\n");
	}
	else
	{
		line[n] = 0;
		printf("接收到数据:%s\n", line);
		
		
		write(clientFd, szHtmlBuf, sizeof(szHtmlBuf));
	}
}

int main()
{
	struct sockaddr_in cliaddr, servaddr;
	int listenFd = socket(AF_INET, SOCK_STREAM, 0);
	if( listenFd < 0)
	{
		printf("socket函数执行失败");
		return 1;
	}
	
	servaddr.sin_family = AF_INET;
	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
	//inet_aton('10.132.10.64', &(servaddr.sin_addr));
	//servaddr.sin_addr.s_addr = inet_addr("10.132.10.64");
	servaddr.sin_port = htons(SERV_PORT);
	if(bind(listenFd, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
	{
	    printf("bind函数执行失败");
	  	return 1;
	}
	
	if(listen(listenFd, LISTENQ) < 0)
	{
			printf("listen函数执行失败");
	  	return 1;
	}
	printf("listen函数执行成功\n");
	
	//select 部分
	
	int maxfd;
	FD_ZERO(&fds);
	
	do{
		FD_SET(listenFd, &fds);
		maxfd = listenFd + 1;
		int nRead = 0;
		if( (nRead = select(maxfd + 1, &fds, NULL, NULL, NULL)) < 0)
		{
			printf("select 失败\n");
			exit(-1);
		}
		printf("select find data Change\n");
		for(int i = 0; i <= maxfd && nRead > 0; i++)
		{
			if(!FD_ISSET(i, &fds))
			{
				continue;
			}
			--nRead;
			if(i == listenFd)
			{
				socklen_t clilen = sizeof(cliaddr);
				int connfd = accept(listenFd, (struct sockaddr*)&cliaddr, &clilen);
				if(connfd < 0)
			 	{
			 		if ((errno != EAGAIN) && (errno != EWOULDBLOCK)) 
			 		{
            printf( "fail to accept new client \n");
            continue;
       		}
				}
				printf("Ip: %s 到此一游\n", inet_ntoa(cliaddr.sin_addr));
				FD_SET(connfd, &fds);
				maxfd = (connfd > maxfd ? connfd : maxfd);
			}
			else
			{
				echo_srv(i);
			}
		}
	
	}while(true);
	
	return 0;
}

直接用浏览器进行测试即可： http://服务器Ip地址:10088