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| #include <sys/socket.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/sendfile.h>
#define PORT 8080
void parse_get_path(const char *req, char *path_out)
{
const char *p = strstr(req, "GET ");
if (!p)
{
strcpy(path_out, "");
return;
}
p += 4;
const char *space = strchr(p, ' ');
if (!space)
{
strcpy(path_out, "");
return;
}
size_t len = space - p;
if (len > 255) len = 255;
strncpy(path_out, p, len);
path_out[len] = '\0';
}
int main() {
int s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0)
{
perror("socket");
return 1;
}
int opt = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(s, (struct sockaddr*)&addr, sizeof(addr)) < 0)
{
perror("bind");
return 1;
}
if (listen(s, SOMAXCONN) < 0)
{
perror("listen");
return 1;
}
printf("Server running on http://0.0.0.0:%d\n", PORT);
while (1)
{
int client_fd = accept(s, NULL, NULL);
if (client_fd < 0)
{
perror("accept");
continue;
}
char buffer[2048] = {0};
recv(client_fd, buffer, sizeof(buffer), 0);
char path[256] = {0};
parse_get_path(buffer, path);
printf("Request path: %s\n", path);
const char *filename = NULL;
if (strcmp(path, "/") == 0 || strcmp(path, "/index.html") == 0)
{
filename = "index.html";
}
if (filename)
{
int fd = open(filename, O_RDONLY);
if (fd < 0)
{
const char *err = "HTTP/1.1 404 Not Found\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: 13\r\n"
"Connection: close\r\n\r\n"
"404 Not Found";
write(client_fd, err, strlen(err));
close(client_fd);
continue;
}
struct stat st;
fstat(fd, &st);
size_t filesize = st.st_size;
char header[256];
int len = snprintf(header, sizeof(header),
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/html\r\n"
"Content-Length: %zu\r\n"
"Connection: close\r\n\r\n",
filesize
);
write(client_fd, header, len);
off_t offset = 0;
while (offset < filesize)
{
ssize_t sent = sendfile(client_fd, fd, &offset, filesize - offset);
if (sent <= 0) break;
}
close(fd);
}
else
{
const char *err = "HTTP/1.1 404 Not Found\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: 13\r\n"
"Connection: close\r\n\r\n"
"404 Not Found";
write(client_fd, err, strlen(err));
}
close(client_fd);
}
close(s);
return 0;
}
|
