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/* Kamil Kaminski
* kkamin8@uic.edu
*
*
* Note: implement content-size, if index.html is not present, generate a page
* that lists root directory, you can use select() to deal with multiple
* requests instead of forking
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/wait.h>
int main(int argc, char **argv)
{
if (argc != 3)
{
fprintf(stderr, "usage: %s <port> <dir>\n", argv[0]);
exit(1);
}
int server_sockfd, ret;
if ((server_sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
close(server_sockfd);
exit(-1);
}
/* allow fast reuse of ports */
int reuse_true = 1;
setsockopt(server_sockfd, SOL_SOCKET, SO_REUSEADDR, &reuse_true,
sizeof(reuse_true));
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(atoi(argv[1]));
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(server_sockfd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
{
perror("bind");
exit(-1);
}
if (listen(server_sockfd, 0) == -1)
{
perror("listen");
exit(-1);
}
while (1)
{
int sockfd;
struct sockaddr_in remote_addr;
unsigned int socklen = sizeof(remote_addr);
sockfd = accept(server_sockfd, (struct sockaddr *) &remote_addr, &socklen);
if (sockfd == -1)
{
perror("accept");
continue;
}
char ipstr[INET6_ADDRSTRLEN];
inet_ntop(remote_addr.sin_family, &remote_addr.sin_addr, ipstr, sizeof(ipstr));
printf("got connection from %s\n", ipstr);
/* read the http header request from the client */
char recv_buff[512] = { 0 };
if ((ret = recv(sockfd, recv_buff, sizeof(recv_buff), 0)) < 0)
{
perror("recv");
shutdown(sockfd, SHUT_RDWR);
close(sockfd);
continue;
}
/* printf("%s", recv_buff); */
char *p;
if (!(p = strstr(recv_buff, "GET")))
continue;
char filereq[100] = { 0 };
sscanf(p, "GET %s HTTP/1.*[01]\r\n", filereq);
printf("requested file: \"%s\"\n", filereq);
char path[200] = { 0 };
sprintf(path, "%s%s", argv[2], filereq[strlen(filereq) - 1] == '/' ?
"/index.html" : filereq);
printf("path is: \"%s\"\n", path);
struct stat stat_buff;
if (stat(path, &stat_buff) == -1)
{
perror("stat");
char err[] = "HTTP/1.0 404 Not Found\r\n\r\n";
send(sockfd, err, sizeof(err), 0);
}
else
{
pid_t pid;
if ((pid = fork()) == 0)
{
char http_header[100] = { 0 };
char *p = strstr(path, "."), *type = NULL;
if (p)
{
if (strcmp(p, ".html") == 0)
type = "Content-Type: text/html\r\n";
else if (strcmp(p, ".gif") == 0)
type = "Content-Type: image/gif\r\n";
else if (strcmp(p, ".png") == 0)
type = "Content-Type: image/png\r\n";
else if (strcmp(p, ".jpeg") == 0 || strcmp(p, ".jpg") == 0)
type = "Content-Type: image/jpeg\r\n";
else if (strcmp(p, ".pdf") == 0)
type = "Content-Type: application/pdf\r\n";
}
sprintf(http_header, "%s%s\r\n", "HTTP/1.1 200 OK\r\n", type ? type : "\r\n");
/* printf("http header:\n\"%s\"\n", http_header); */
FILE *fp = fopen(path, "r");
char *file = (char *) malloc(sizeof(char) * (stat_buff.st_size + strlen(http_header)));
if (file && fp)
{
memcpy(file, http_header, strlen(http_header));
fread(file + strlen(http_header), stat_buff.st_size, sizeof(char), fp);
send(sockfd, file, stat_buff.st_size + strlen(http_header), 0);
free(file);
}
fclose(fp);
shutdown(sockfd, SHUT_RDWR);
close(sockfd);
exit(0);
}
else if (pid > 0)
{
wait(NULL);
}
else
{
perror("fork");
shutdown(sockfd, SHUT_RDWR);
close(sockfd);
}
}
}
shutdown(server_sockfd, SHUT_RDWR);
close(server_sockfd);
}
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