#include <stdio.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/epoll.h>
#include <arpa/inet.h>
#include <errno.h>
#include <assert.h>
#include <unistd.h>
#include <pthread.h>
#include <signal.h>
#define MAX_WORKERS 128
pthread_t hworker[MAX_WORKERS];
#define MAX_EVENTS 512
struct epoll_event ev;
struct epoll_event events[MAX_EVENTS];
int epfd;
int sockfd;
static int exit_flag = 0;
char html[] =
"HTTP/1.1 200 OK\r\n"
"Server: F-Stack\r\n"
"Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
"Content-Type: text/html\r\n"
"Content-Length: 438\r\n"
"Last-Modified: Tue, 21 Feb 2017 09:44:03 GMT\r\n"
"Connection: keep-alive\r\n"
"Accept-Ranges: bytes\r\n"
"\r\n"
"<!DOCTYPE html>\r\n"
"<html>\r\n"
"<head>\r\n"
"<title>Welcome to F-Stack!</title>\r\n"
"<style>\r\n"
" body { \r\n"
" width: 35em;\r\n"
" margin: 0 auto; \r\n"
" font-family: Tahoma, Verdana, Arial, sans-serif;\r\n"
" }\r\n"
"</style>\r\n"
"</head>\r\n"
"<body>\r\n"
"<h1>Welcome to F-Stack!</h1>\r\n"
"\r\n"
"<p>For online documentation and support please refer to\r\n"
"<a href=\"http://F-Stack.org/\">F-Stack.org</a>.<br/>\r\n"
"\r\n"
"<p><em>Thank you for using F-Stack.</em></p>\r\n"
"</body>\r\n"
"</html>";
void sig_term(int sig)
{
printf("we caught signal %d, to exit helloworld\n", sig);
exit_flag = 1;
//alarm_event_sem();
return;
}
void *loop(void *arg)
{
/* Wait for events to happen */
while (!exit_flag) {
/*
* If not call alarm_event_sem, and epoll_wait timeout is 0,
* it can't exit normal, so timeout can't set to 0.
*/
int nevents = epoll_wait(epfd, events, MAX_EVENTS, 100);
int i;
if (nevents <= 0) {
if (nevents) {
printf("hello world epoll wait ret %d, errno:%d, %s\n",
nevents, errno, strerror(errno));
break;
}
//usleep(100);
//sleep(1);
}
//printf("get nevents:%d\n", nevents);
for (i = 0; i < nevents; ++i) {
/* Handle new connect */
if (events[i].data.fd == sockfd) {
while (1) {
int nclientfd = accept(sockfd, NULL, NULL);
if (nclientfd < 0) {
break;
}
/* Add to event list */
ev.data.fd = nclientfd;
ev.events = EPOLLIN;
if (epoll_ctl(epfd, EPOLL_CTL_ADD, nclientfd, &ev) != 0) {
printf("ff_epoll_ctl failed:%d, %s\n",
errno, strerror(errno));
close(nclientfd);
break;
}
}
} else {
if (events[i].events & EPOLLERR ) {
/* Simply close socket */
epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, NULL);
close(events[i].data.fd);
} else if (events[i].events & EPOLLIN) {
char buf[256];
size_t readlen = read( events[i].data.fd, buf, sizeof(buf));
if(readlen > 0) {
write( events[i].data.fd, html, sizeof(html) - 1);
} else {
epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, NULL);
close(events[i].data.fd);
}
} else {
printf("unknown event: %8.8X\n", events[i].events);
}
}
}
}
return NULL;
}
int main(int argc, char * argv[])
{
int i, worker_num = 1;
signal(SIGINT, sig_term);
signal(SIGTERM, sig_term);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
printf("sockfd:%d\n", sockfd);
if (sockfd < 0) {
printf("ff_socket failed\n");
return -1;
}
int on = 1;
ioctl(sockfd, FIONBIO, &on);
struct sockaddr_in my_addr;
bzero(&my_addr, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(80);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
int ret = bind(sockfd, (const struct sockaddr *)&my_addr, sizeof(my_addr));
if (ret < 0) {
printf("ff_bind failed\n");
close(sockfd);
return -1;
}
ret = listen(sockfd, MAX_EVENTS);
if (ret < 0) {
printf("ff_listen failed\n");
close(sockfd);
return -1;
}
epfd = epoll_create(0);
printf("epfd:%d\n", epfd);
if (epfd <= 0) {
printf("ff_epoll_create failed, errno:%d, %s\n",
errno, strerror(errno));
close(sockfd);
return -1;
}
ev.data.fd = sockfd;
ev.events = EPOLLIN;
ret = epoll_ctl(epfd, EPOLL_CTL_ADD, sockfd, &ev);
if (ret < 0) {
printf("ff_listen failed\n");
close(epfd);
close(sockfd);
return -1;
}
for (i = 0; i < worker_num; i++) {
if(pthread_create(&hworker[i], NULL, loop, (void *)&i) < 0) {
printf("create loop thread failed., errno:%d/%s\n",
errno, strerror(errno));
close(epfd);
close(sockfd);
return -1;
}
}
for (i = 0; i < worker_num; i++) {
pthread_join(hworker[i], NULL);
}
close(epfd);
close(sockfd);
return 0;
}