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server.c
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server.c
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#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <unistd.h>
#include <sys/epoll.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#define MAX_EVENTS 256
int set_nonblock(int fd)
{
int flags;
#if defined(O_NONBLOCK)
if (-1 == (flags = fcntl(fd, F_GETFL, 0)))
flags = 0;
return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
#else
flags = 1;
return ioctl(fd, FIOBIO, &flags);
#endif
}
ssize_t sock_fd_write(int sock, void *buf, ssize_t buflen, int fd)
{
ssize_t size;
struct msghdr msg;
struct iovec iov;
union {
struct cmsghdr cmsghdr;
char control[CMSG_SPACE(sizeof (int))];
} cmsgu;
struct cmsghdr *cmsg;
iov.iov_base = buf;
iov.iov_len = buflen;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
if (fd != -1) {
msg.msg_control = cmsgu.control;
msg.msg_controllen = sizeof(cmsgu.control);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_len = CMSG_LEN(sizeof (int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
//printf ("passing fd %d\n", fd);
*((int *) CMSG_DATA(cmsg)) = fd;
} else {
msg.msg_control = NULL;
msg.msg_controllen = 0;
// printf ("not passing fd\n");
}
size = sendmsg(sock, &msg, 0);
/*if (size < 0)
perror ("sendmsg");*/
return size;
}
ssize_t
sock_fd_read(int sock, void *buf, ssize_t bufsize, int *fd)
{
ssize_t size;
if (fd) {
struct msghdr msg;
struct iovec iov;
union {
struct cmsghdr cmsghdr;
char control[CMSG_SPACE(sizeof (int))];
} cmsgu;
struct cmsghdr *cmsg;
iov.iov_base = buf;
iov.iov_len = bufsize;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = cmsgu.control;
msg.msg_controllen = sizeof(cmsgu.control);
size = recvmsg (sock, &msg, 0);
if (size < 0) {
//perror ("recvmsg");
exit(1);
}
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg && cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
if (cmsg->cmsg_level != SOL_SOCKET) {
//fprintf (stderr, "invalid cmsg_level %d\n", cmsg->cmsg_level);
exit(1);
}
if (cmsg->cmsg_type != SCM_RIGHTS) {
//fprintf (stderr, "invalid cmsg_type %d\n", cmsg->cmsg_type);
exit(1);
}
*fd = *((int *) CMSG_DATA(cmsg));
//printf ("received fd %d\n", *fd);
} else
*fd = -1;
} else {
size = read (sock, buf, bufsize);
if (size < 0) {
//perror("read");
exit(1);
}
}
return size;
}
void worker(int sock, char * path)
{
int fd;
char buf[16];
ssize_t size;
sleep(1);
for (;;) {
size = sock_fd_read(sock, buf, sizeof(buf), &fd);
if (size <= 0)
break;
//printf ("read %d\n", (int) size);
if (fd != -1) {
const unsigned int BUF_SIZE = 1024;
char buffer [BUF_SIZE];
int res = recv(fd, buffer, BUF_SIZE, MSG_NOSIGNAL);
if ((res == 0) && (errno != EAGAIN)) {
}
else if (res > 0) {
FILE *fp;
unsigned char flag = 0, version = 1;
char * pt1, *pt2, *pt3, *pt4;
char resp[4096]= {0};
char url[64] = {0};
time_t rtime;
char h_error_v1[] = "HTTP/1.0 404 Not found\r\nContent-Type: text/html\r\nContent-Length:0\r\n\r\n";//<html><header>Not found!</header><body><h1>Not found!</h1></body></html>";
char h_error_v0[] = "HTTP/0.9 404 Not Found\r\n\r\n";
//char header[] = "HTTP/%d.%d 200 OK\nDate: %s\nServer: Test\nContent-type: text/html\nContent-Length:"; //"\n\n"
memcpy(resp,h_error_v1,sizeof(h_error_v1));
time(&rtime);
if(buffer[0] == 'q')
exit(0);
/*if(strstr(buffer, "text/html"))
flag = 1;*/
pt3 = strstr(buffer, "HTTP/");
if(pt3 == NULL)
flag = 0;
if(*(pt3 + 5) == '0')
version = 0;
if(version)
sprintf(resp, "%s",h_error_v1);
else
sprintf(resp, "%s",h_error_v0);
if(strstr(buffer, "GET") == NULL)
flag = 0;
pt1 = memchr(buffer, '/', BUF_SIZE);
if(pt1 != NULL && flag == 1){
pt2 = pt1 + strcspn(pt1, " ?");
if(1){
char full_path[96] = {0};
char buf[2048] = {0};
int len = 0;
//printf("len %d\n", (int)(pt2-pt1));
memcpy(url, pt1, pt2-pt1);
sprintf(full_path, "%s%s",path, url);
//printf("file path: %s\n", full_path);
fp = fopen(full_path,"r");
if(fp != NULL){
len = fread(buf, 1, sizeof(buf), fp);
if(version)
sprintf(resp, "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nContent-Length:%d\r\n\r\n%s", /*ctime(&rtime),*/len,buf);
else sprintf(resp, "HTTP/0.9 200 OK\r\nContent-Length:%d\r\n\r\n%s",len,buf);
fclose(fp);
}//fp
}//pt2
}//pt1
send(fd, resp, strlen(resp), MSG_NOSIGNAL);
}//res>0
shutdown(fd, SHUT_RDWR);
close(fd);
//printf("socket closed!\n");
}
}
}
int main(int argc, char **argv)
{
char path[64] = "/home/box/final";
char ip[16] = "127.0.0.1";
int port = 12345;
int opt;
int server_socket, conn_socket;
struct epoll_event events[MAX_EVENTS];
struct epoll_event event;
struct sockaddr_in sock_addr;
int epollfd, nfds, i, robin = 0;
int pid;
int on = 1;
int sv[2][2];
pid = fork();
if(pid != 0) return 0;
pid = fork();
if(pid != 0) return 0;
while ((opt = getopt(argc, argv, "h:p:d:")) != -1) {
switch (opt) {
case 'h':
//ip.assign( optarg) ;
sprintf(ip,"%s", optarg);
break;
case 'p':
port = atoi(optarg);
break;
case 'd':
//path.assign(optarg);
sprintf(path, "%s", optarg);
break;
default: /* '?' */
//std::cout << "Usage: " << argv[0] << " [-h host_ip] [-p host_port] [-d directory]" << std::endl;
printf("Ussage: %s [-h host_ip] [-p host_port][-d directory]",argv[0]);
return -1;
}
}
for(i = 0; i < 1 ; i++){
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv[i]) < 0) {
// printf("socketpair error");
exit(1);
}
switch ((pid = fork())) {
case 0:
close(sv[i][0]);
worker(sv[i][1], path);
return 0;
case -1:
//printf("fork error");
exit(1);
default:
close(sv[i][1]);
/// parent(sv[i][0]);
break;
}
}
server_socket = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
setsockopt ( server_socket, SOL_SOCKET, SO_REUSEADDR, (const char *) &on, sizeof(on));
sock_addr.sin_family = AF_INET;
sock_addr.sin_port = htons(port);
sock_addr.sin_addr.s_addr = inet_addr(ip);
//inet_pton(AF_INET, ip, &sock_addr);
bind(server_socket, (struct sockaddr *) (&sock_addr), sizeof(sock_addr));
set_nonblock(server_socket);
listen(server_socket, SOMAXCONN);
epollfd = epoll_create1(0);
if (epollfd == -1) {
goto error;
}
event.data.fd = server_socket;
event.events = EPOLLIN;
if(epoll_ctl (epollfd, EPOLL_CTL_ADD, server_socket, &event) == -1) {
goto error;
}
while (1) {
nfds = epoll_wait(epollfd, events, MAX_EVENTS, -1);
if(nfds == -1){
goto error;
}
for (i = 0; i < nfds; ++ i) {
if (events[i].data.fd == server_socket) {
conn_socket = accept(server_socket, 0, 0);
if (conn_socket == -1) {
goto error;
}
set_nonblock(conn_socket);
event.data.fd = conn_socket;
event.events = EPOLLIN | EPOLLET;
if(epoll_ctl(epollfd, EPOLL_CTL_ADD, conn_socket, & event) == -1){
goto error;
}
}
else {
epoll_ctl(epollfd, EPOLL_CTL_DEL, events[i].data.fd, NULL);
if(robin ) robin = 0;
else robin = 1;
sock_fd_write(sv[robin][0], "1", 1, events[i].data.fd);
}
}
}
error:
shutdown(server_socket, SHUT_RDWR);
close(server_socket);
return 0;
}