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/* simpleHTTPd (C) 1998 netSTOR Technologies, Inc. ("netSTOR")
FreeBSD port and additional work by Marc Nicholas <marc@netstor.com>
Based on work by:-
Thierry Leconte & Yury Shimanovsky
My Russian webserver writing friends :-)
This is an HTTP daemon that will serve up HTML, text files, JPEGs,
GIFs and do simple CGI work.
You may use this code for non-commercial distribution only. Commercial
distribution requires the express, written permission of netSTOR. No
warranty is implied or given -- use at your own risk!
*/
/*
* $Id: simple_httpd.c,v 1.1.1.1 1998/08/27 17:38:45 abial Exp $
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <sys/wait.h>
#define LOGDIR "/var/log"
int http_sock, con_sock;
int http_port = 80;
struct sockaddr_in source;
char homedir[100];
char *adate();
struct hostent *hst;
void
init_servconnection(void)
{
struct sockaddr_in server;
/* Create a socket */
http_sock = socket(AF_INET, SOCK_STREAM, 0);
if (http_sock < 0) {
perror("socket");
exit(1);
}
server.sin_family = AF_INET;
server.sin_port = htons(http_port);
server.sin_addr.s_addr = INADDR_ANY;
if (bind(http_sock, (struct sockaddr *) & server, sizeof(server)) < 0) {
perror("bind socket");
exit(1);
}
printf("simpleHTTPd running on %d port\n",http_port);
}
attenteconnection(void)
{
int lg;
lg = sizeof(struct sockaddr_in);
con_sock = accept(http_sock, (struct sockaddr *) & source, &lg);
if (con_sock <= 0) {
perror("accept");
exit(1);
}
}
outdate()
{
time_t tl;
char buff[50];
tl = time(NULL);
strftime(buff, 50, "Date: %a, %d %h %Y %H:%M:%S %Z\r\n", gmtime(&tl));
write(con_sock, buff, strlen(buff));
}
char *rep_err_nget[2] = {"<HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY><H1>Error 405</H1>\
This server is supports only GET and HEAD requests\n</BODY></HTML>\r\n",
"HTTP/1.0 405 Method Not allowed\r\nAllow: GET,HEAD\r\nServer: jhttpd\r\n"};
char *rep_err_acc[2] = {"<HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY><H1>Error 404</H1>\
Not found - file doesn't exist or is read protected\n</BODY></HTML>\r\n",
"HTTP/1.0 404 Not found\r\nServer: jhttpd\r\n"};
outerror(char **rep, int http1) /* ÷ÙÄÙÞÁ ÏÛÉÂËÉ ËÌÉÅÎÔÕ × html- ×ÉÄÅ */
{
if (http1) {
write(con_sock, rep[1], strlen(rep[1]));
outdate();
write(con_sock, "\r\n", 2);
}
write(con_sock, rep[0], strlen(rep[0]));
}
char rep_head[] = "HTTP/1.0 200 OK\r\nServer: simpleHTTPD\r\n";
traite_req()
{
char buff[8192];
int fd, lg, cmd, http1, i;
char *filename, *c;
struct stat statres;
char req[1024];
char logfile[80];
char msg[1024];
char *p,
*par;
long addr;
FILE *log;
lg = read(con_sock, req, 1024);
if (p=strstr(req,"\n")) *p=0;
if (p=strstr(req,"\r")) *p=0;
if (geteuid())
{
strcpy(logfile,getenv("HOME"));
strcat(logfile,"/");
strcat(logfile,"jhttp.log");
}
else strcpy(logfile, LOGDIR "/jhttpd.log");
if ( access(logfile,W_OK))
{
lg=creat (logfile,O_WRONLY);
chmod (logfile,00600);
close(lg);
}
strcpy(buff,inet_ntoa(source.sin_addr));
addr=inet_addr(buff);
strcpy(msg,adate());
strcat(msg," ");
hst=gethostbyaddr((char*) &addr, 4, AF_INET);
if (hst) strcat(msg,hst->h_name);
strcat(msg," (");
strcat(msg,buff);
strcat(msg,") ");
strcat(msg,req);
log=fopen(logfile,"a");
fprintf(log,"%s\n",msg);
fclose(log);
c = strtok(req, " ");
if (c == NULL) {
outerror(rep_err_nget, 0);
goto error;
}
cmd = 0;
if (strncmp(c, "GET", 3) == 0)
cmd = 1;
if (strncmp(c, "HEAD", 4) == 0) {
cmd = 2;
}
filename = strtok(NULL, " ");
http1 = 0;
c = strtok(NULL, " ");
if (c != NULL && strncmp(c, "HTTP", 4) == 0)
http1 = 1;
if (cmd == 0) {
outerror(rep_err_nget, http1);
goto error;
}
if (filename == NULL ||
strlen(filename)==1) filename="/index.html";
while (filename[0]== '/') filename++;
/**/
if (!strncmp(filename,"cgi-bin/",8))
{
par=0;
if (par=strstr(filename,"?"))
{
*par=0;
par++;
}
if (access(filename,X_OK)) goto conti;
stat (filename,&statres);
if (setuid(statres.st_uid)) return(0);
if (seteuid(statres.st_uid)) return(0);
if (!fork())
{
close(1);
dup(con_sock);
printf("HTTP/1.0 200 OK\nContent-type: text/html\n\n\n");
execlp (filename,filename,par,0);
}
wait(&i);
return(0);
}
conti:
if (filename == NULL) {
outerror(rep_err_acc, http1);
goto error;
}
/* interdit les .. dans le path */
c = filename;
while (*c != '\0')
if (c[0] == '.' && c[1] == '.') {
outerror(rep_err_acc, http1);
goto error;
} else
c++;
fd = open(filename, O_RDONLY);
if (fd < 0) {
outerror(rep_err_acc, http1);
goto error;
}
if (fstat(fd, &statres) < 0) {
outerror(rep_err_acc, http1);
goto error;
}
if (!S_ISREG(statres.st_mode))
{
outerror(rep_err_acc, http1);
goto error;
}
if (http1) {
char buff[50];
time_t tl;
write(con_sock, rep_head, strlen(rep_head));
sprintf(buff, "Content-length: %d\r\n", statres.st_size);
write(con_sock, buff, strlen(buff));
outdate();
if (strstr(filename,"."))
{
strcpy(buff,"Content-type: ");
strcat(buff,strstr(filename,".")+1);
strcat(buff,"\r\n");
write(con_sock,buff,strlen(buff));
}
if (strstr(filename,".txt"))
{
strcpy(buff,"Content-type: text/plain\r\n");
write(con_sock, buff, strlen(buff));
}
if (strstr(filename,".html") ||
strstr(filename,".htm"))
{
strcpy(buff,"Content-type: text/html\r\n");
write(con_sock, buff, strlen(buff));
}
if (strstr(filename,".gif"))
{
strcpy(buff,"Content-type: image/gif\r\n");
write(con_sock, buff, strlen(buff));
}
if (strstr(filename,".jpg"))
{
strcpy(buff,"Content-type: image/jpeg\r\n");
write(con_sock, buff, strlen(buff));
}
strftime(buff, 50, "Last-Modified: %a, %d %h %Y %H:%M:%S %Z\r\n\r\n", gmtime(&statres.st_mtime));
write(con_sock, buff, strlen(buff));
}
if (cmd == 1) {
while (lg = read(fd, buff, 8192))
write(con_sock, buff, lg);
}
error:
close(fd);
close(con_sock);
}
main(int argc, char **argv)
{
int lg;
char hello[100];
if (argc<2 && geteuid())
{
printf("Usage: simple_htppd <port>\n");
exit(1);
}
if (argc>=2) http_port = atoi(argv[1]);
strcpy (homedir,getenv("HOME"));
if (!geteuid()) strcpy (homedir,"/httphome");
else strcat (homedir,"/httphome");
strcpy(hello,homedir);
strcat(hello,"/0hello.html");
if (chdir(homedir))
{
perror("chdir");
puts(homedir);
exit(1);
}
init_servconnection();
if (fork()) exit(0);
setpgrp(0,65534);
signal(SIGQUIT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
if (listen(http_sock,100) < 0) exit(1);
label:
attenteconnection();
if (fork())
{
close(con_sock);
goto label;
}
alarm(1800);
traite_req();
exit(0);
}
char *adate()
{
static char out[50];
long now;
struct tm *t;
time(&now);
t = localtime(&now);
sprintf(out, "%4d/%02d/%02d %02d:%02d:%02d",
t->tm_year+1900, t->tm_mon+1, t->tm_mday,
t->tm_hour, t->tm_min, t->tm_sec );
return out;
}
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