mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-30 07:30:04 +00:00
358 lines
7.1 KiB
C
358 lines
7.1 KiB
C
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <netdb.h>
|
|
#include <time.h>
|
|
|
|
#define BUFFER_SIZE 256
|
|
|
|
/* assume the max command we get is this big */
|
|
#define RECEIVE_BUFFER_SIZE 4096
|
|
|
|
|
|
/* Default port to listen on */
|
|
#define DEFAULT_PORT 80
|
|
|
|
|
|
#define MIME_HTML 0
|
|
#define MIME_TXT 1
|
|
#define MIME_PNG 2
|
|
#define MIME_JPG 3
|
|
#define MIME_MAX 4
|
|
|
|
|
|
|
|
struct mime_type {
|
|
char extension[5];
|
|
char string[32];
|
|
};
|
|
|
|
struct mime_type mime[MIME_MAX] = {
|
|
{"html", "text/html"},
|
|
{"txt", "text/plain"},
|
|
{"png", "image/png"},
|
|
{"jpg", "image/jpeg"},
|
|
};
|
|
|
|
static int detect_mime(char *filename) {
|
|
|
|
int i,j;
|
|
|
|
i=strlen(filename);
|
|
while(i>0) {
|
|
if (filename[i]=='.') break;
|
|
i--;
|
|
}
|
|
i++;
|
|
|
|
for(j=0;j<MIME_MAX;j++) {
|
|
if (!strcmp(filename+i,mime[j].extension)) {
|
|
printf("Found filetype %s\n",mime[j].string);
|
|
return j;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
return MIME_HTML;
|
|
}
|
|
|
|
static int serve_file(int fd, char *filename) {
|
|
|
|
int n,result,mime_type,out_size=0;
|
|
char time_string[1000];
|
|
time_t now = time(NULL);
|
|
struct tm tm = *gmtime(&now);
|
|
struct stat stat_buf;
|
|
char out_buffer[4096];
|
|
|
|
strftime(time_string, sizeof(time_string),
|
|
"%a, %d %b %Y %H:%M:%S %Z", &tm);
|
|
|
|
result=stat(filename,&stat_buf);
|
|
|
|
mime_type=detect_mime(filename);
|
|
|
|
if (strstr(filename,"teapot")) {
|
|
char message418[]=
|
|
"<html><head>\r\n"
|
|
"<title>418 I'm a teapot</title>\r\n"
|
|
"</head><body>\r\n"
|
|
"<h1>I'm a Teapot</h1>\r\n"
|
|
"<p>I'm a *little* teapot.<br />\r\n"
|
|
"</p>\r\n"
|
|
"</body></html>\r\n";
|
|
|
|
sprintf(out_buffer,
|
|
"HTTP/1.1 418 I'm a teapot\r\n"
|
|
"Date: %s\r\n"
|
|
"Server: VMW-web\r\n"
|
|
"Content-Length: %d\r\n"
|
|
"Connection: close\r\n"
|
|
"Content-Type: text/html; charset=iso-8859-1\r\n"
|
|
"\r\n"
|
|
"%s",
|
|
time_string,(int)strlen(message418),message418);
|
|
out_size=strlen(out_buffer);
|
|
|
|
} else if (result<0) {
|
|
char message404[]=
|
|
"<html><head>\r\n"
|
|
"<title>400 Bad Request</title>\r\n"
|
|
"</head><body>\r\n"
|
|
"<h1>Bad Request</h1>\r\n"
|
|
"<p>Your browser sent a request that this server could not understand.<br />\r\n"
|
|
"</p>\r\n"
|
|
"</body></html>\r\n";
|
|
|
|
sprintf(out_buffer,
|
|
"HTTP/1.1 400 Bad Request\r\n"
|
|
"Date: %s\r\n"
|
|
"Server: VMW-web\r\n"
|
|
"Content-Length: %d\r\n"
|
|
"Connection: close\r\n"
|
|
"Content-Type: text/html; charset=iso-8859-1\r\n"
|
|
"\r\n"
|
|
"%s",
|
|
time_string,(int)strlen(message404),message404);
|
|
out_size=strlen(out_buffer);
|
|
}
|
|
|
|
else {
|
|
char mod_string[1000];
|
|
tm = *gmtime(&stat_buf.st_mtime);
|
|
int in_fd,out_offset;
|
|
char file_buffer[256];
|
|
|
|
strftime(mod_string, sizeof(mod_string),
|
|
"%a, %d %b %Y %H:%M:%S %Z", &tm);
|
|
|
|
sprintf(out_buffer,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Date: %s\r\n"
|
|
"Server: VMW-web\r\n"
|
|
"Last-Modified: %s\r\n"
|
|
"Content-Length: %ld\r\n"
|
|
"Content-Type: %s\r\n"
|
|
"\r\n",
|
|
time_string,
|
|
mod_string,
|
|
stat_buf.st_size,
|
|
mime[mime_type].string);
|
|
|
|
out_offset=strlen(out_buffer);
|
|
|
|
in_fd=open(filename,O_RDONLY);
|
|
if (in_fd<0) {
|
|
fprintf(stderr,"Could not open %s\n",filename);
|
|
} else {
|
|
while(1) {
|
|
result=read(in_fd,&file_buffer,256);
|
|
if (result<=0) break;
|
|
|
|
memcpy(out_buffer+out_offset,
|
|
file_buffer,result);
|
|
out_offset+=result;
|
|
}
|
|
|
|
close(in_fd);
|
|
}
|
|
out_size=out_offset;
|
|
}
|
|
|
|
|
|
/* Send a response */
|
|
|
|
printf("Sending:\n");
|
|
printf("%s\n",out_buffer);
|
|
|
|
n = write(fd,out_buffer,out_size);
|
|
if (n<0) {
|
|
fprintf(stderr,"Error writing. %s\n",
|
|
strerror(errno));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
int socket_fd,new_socket_fd;
|
|
struct sockaddr_in server_addr, client_addr;
|
|
struct addrinfo hints,*server_info;
|
|
int port=DEFAULT_PORT;
|
|
int n;
|
|
socklen_t client_len;
|
|
char buffer[BUFFER_SIZE];
|
|
char in[RECEIVE_BUFFER_SIZE];
|
|
int i,result,in_ptr=0;
|
|
char port_string[BUFFER_SIZE];
|
|
|
|
if (argc>1) {
|
|
port=atoi(argv[1]);
|
|
}
|
|
sprintf(port_string,"%d",port);
|
|
|
|
|
|
printf("Starting server on port %d\n",port);
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = AF_INET;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
|
|
/* Null means localhost */
|
|
/* How can we get IP of default interface? */
|
|
result=getaddrinfo(NULL,port_string,&hints,&server_info);
|
|
if (result<0) {
|
|
fprintf(stderr,"Error getaddrinfo!\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Open a socket to listen on */
|
|
/* AF_INET means an IPv4 connection */
|
|
/* SOCK_STREAM means reliable two-way connection (TCP) */
|
|
socket_fd = socket(hints.ai_family, hints.ai_socktype, hints.ai_protocol);
|
|
if (socket_fd<0) {
|
|
fprintf(stderr,"Error opening socket! %s\n",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/* Set up the server address to listen on */
|
|
memset(&server_addr,0,sizeof(struct sockaddr_in));
|
|
server_addr.sin_family=AF_INET;
|
|
/* Convert the port we want to network byte order */
|
|
server_addr.sin_port=htons(port);
|
|
|
|
|
|
/* Bind to the port */
|
|
if (bind(socket_fd, server_info->ai_addr,server_info->ai_addrlen)) {
|
|
fprintf(stderr,"Error binding! %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/* Tell the server we want to listen on the port */
|
|
/* Second argument is backlog, how many pending connections can */
|
|
/* build up */
|
|
listen(socket_fd,5);
|
|
|
|
listen_connection:
|
|
|
|
/* Call accept to create a new file descriptor for an incoming */
|
|
/* connection. It takes the oldest one off the queue */
|
|
/* We're blocking so it waits here until a connection happens */
|
|
client_len=sizeof(client_addr);
|
|
new_socket_fd = accept(socket_fd,
|
|
(struct sockaddr *)&client_addr,&client_len);
|
|
if (new_socket_fd<0) {
|
|
fprintf(stderr,"Error accepting! %s\n",strerror(errno));
|
|
}
|
|
|
|
|
|
in_ptr=0;
|
|
|
|
while(1) {
|
|
|
|
/* Someone connected! Let's try to read BUFFER_SIZE-1 bytes */
|
|
memset(buffer,0,BUFFER_SIZE);
|
|
n = read(new_socket_fd,buffer,(BUFFER_SIZE-1));
|
|
if (n==0) {
|
|
fprintf(stderr,"Connection to client lost\n\n");
|
|
break;
|
|
}
|
|
else if (n<0) {
|
|
fprintf(stderr,"Error reading from socket %s\n",
|
|
strerror(errno));
|
|
}
|
|
|
|
if (in_ptr+n>RECEIVE_BUFFER_SIZE) {
|
|
fprintf(stderr,"Overflow receive buffer!\n");
|
|
break;
|
|
}
|
|
|
|
memcpy(&in[in_ptr],buffer,n);
|
|
in_ptr+=n;
|
|
in[in_ptr]=0;
|
|
|
|
/* See if last chars were CRLFCRLF (empty line) */
|
|
/* Which indicates done talking */
|
|
if ((in[in_ptr-1]=='\n') && (in[in_ptr-3]=='\n')) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* Print the message we received */
|
|
|
|
char filename[BUFSIZ];
|
|
|
|
printf("Request from webserver:\n");
|
|
i=0;
|
|
int found_filename=0,file_ptr=0;
|
|
while(i<strlen(in)) {
|
|
|
|
if (!found_filename) {
|
|
if (in[i]=='G') {
|
|
printf("G"); i++;
|
|
if (in[i]=='E') {
|
|
printf("E"); i++;
|
|
if (in[i]=='T') {
|
|
printf("T"); i++;
|
|
if (in[i]==' ') {
|
|
printf(" "); i++;
|
|
found_filename=1;
|
|
while(in[i]!=' ') {
|
|
filename[file_ptr]=in[i];
|
|
printf("%c",in[i]);
|
|
i++;
|
|
file_ptr++;
|
|
if (file_ptr>BUFSIZ) break;
|
|
}
|
|
filename[file_ptr]=0;
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("%c",in[i]);
|
|
i++;
|
|
}
|
|
|
|
if (!strcmp(filename,"/")) {
|
|
printf("Mapping / to index.html\n");
|
|
strcpy(filename,"/index.html");
|
|
}
|
|
|
|
printf("Sending back file: %s\n",filename);
|
|
|
|
/* Skip leading / */
|
|
serve_file(new_socket_fd,filename+1);
|
|
|
|
printf("Exiting server\n\n");
|
|
|
|
/* Try to avoid TIME_WAIT */
|
|
// sleep(1);
|
|
|
|
/* Close the sockets */
|
|
close(new_socket_fd);
|
|
|
|
goto listen_connection;
|
|
|
|
close(socket_fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|