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|
/**
* @file minihttpd.c
* @author Mathieu Bunel
* @brief Minimal HTTP 0.9 deamon.
* @version 0.3
* @date 2008
*
* Minimal http server.
* @todo Protect against bad formatted request like GET //bin/sh or GET /../foo.
* @todo Make robust.
* @todo directory handling (if /foo/ is request, send /foo/index.html)
*
* 0.3
* Create a thread on each new connection
*
*
* 0.2
* Able to provide files.
* Answers index.html on 'GET /' request.
* Answers error page if request page is unknown.
*
* 0.1
* Accepts one connection, disconnect after answer.
* GET request without arg, just answer an hello world page.
*
*
*/
/**
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <pthread.h>
#ifdef WIN32
#include <winsock2.h>
#include <process.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netdb.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close(s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
typedef struct in_addr IN_ADDR;
#endif
#ifndef socklen_t
#define socklen_t int
#endif
#ifdef _DEBUG
#define TRACE(a) printf(a)
#define TRACEd(a) printf("%d",a)
#else
#define TRACE(a) /**/
#define TRACEd(a) /**/
#endif
#define PORT 7766
#define DEFAULT_PORT 8080
#define VERSION 0.3
#define SND_BUF_SIZE 128
#define QUERY_BUF_SIZE 1024
#define ERROR_404 "HTTP/0.9 200 OK\r\n\
Content-Type: text/html\r\n\r\n\
<html> \
<head><title>minihttpd</title></head>\
<body>\
minihttpd 0.3<br>\
Error file not found.<br>\
</body>\
</html>\r\n\r\n"
void send_file (FILE * pFile, SOCKET sock)
{
TRACE ("send_file\n");
char buffer[SND_BUF_SIZE];
size_t cSize, cRead, cSend;
if (NULL == pFile)
{
return;
}
/* get file size */
fseek (pFile, 0, SEEK_SET);
fseek (pFile, 0, SEEK_END);
cSize = ftell (pFile);
#ifdef _DEBUG
printf ("size: %uko\n", cSize / 1024);
#endif
/* go back to file start */
fseek (pFile, 0, SEEK_SET);
while (0 != cSize)
{
/* read portion of file */
cRead =
fread (buffer, SND_BUF_SIZE < cSize ? SND_BUF_SIZE : cSize, 1,
pFile);
if (cRead < 1)
{
perror ("fread()");
break;
}
/* send file */
cSend =
send (sock, buffer, SND_BUF_SIZE < cSize ? SND_BUF_SIZE : cSize, 0);
if (cSend < 1)
{
perror ("send()");
break;
}
if (cSize > SND_BUF_SIZE)
{
cSize -= SND_BUF_SIZE;
}
else
{
cSize = 0;
break;
}
}
}
void parse_request (char *pRequest, size_t size, SOCKET sock)
{
TRACE ("parse_request(");
TRACE (pRequest);
TRACE (", ");
TRACEd (size);
TRACE (")\n");
char reqPage[SND_BUF_SIZE] = { 0 };
size_t i = 0;
FILE *pFile;
if ((NULL == pRequest) || (size < 1))
{
return;
}
if (0 == strncmp ("GET /", pRequest, 5))
{
/* Can't use strtok, pRequest might not have '\0' delimiter */
for (i = 5; i < size; ++i)
{
if (' ' == pRequest[i])
{
break;
}
}
}
if (i > 5)
{
strncpy (reqPage, pRequest + 5, i - 5);
}
else
{
strcpy (reqPage, "index.html");
printf ("Default page requested... sending index.html\n");
}
pFile = fopen (reqPage, "rb");
if (NULL != pFile)
{
#ifdef _DEBUG
printf ("Page \"%s\" requested\n", reqPage);
#endif
send_file (pFile, sock);
fclose (pFile);
}
else
{
send (sock, ERROR_404, strlen (ERROR_404), 0);
printf ("Page \"%s\" not found\n", reqPage);
}
}
/** can be a thread or a function */
void *wait_query (void *pcsock)
{
if (pcsock != NULL)
{
SOCKET csock = *(SOCKET *) pcsock;
printf ("csock = %d\n", (int) csock);
/* Waiting query */
{
char buffer[QUERY_BUF_SIZE];
int cReceived = recv (csock, buffer, QUERY_BUF_SIZE - 1, 0);
if (cReceived < 0)
{
perror ("recv()");
}
else
{
buffer[cReceived] = 0;
parse_request (buffer, cReceived, csock);
}
}
/* closing connection to client */
closesocket (csock);
}
return NULL;
}
/**
* init function.
* today, on ly used to init Win32 sockets
*/
void init (void)
{
#ifdef WIN32
/* init socket windows */
WSADATA wsa;
WSAStartup (MAKEWORD (2, 2), &wsa);
#endif
}
/**
* init function.
* today, on ly used to desinit Win32 sockets
*/
void desinit (void)
{
#ifdef WIN32
/* desinit socket windows */
WSACleanup ();
printf ("system desinited\n");
#endif
}
void make_file (char const *name, int lignes)
{
FILE *fp = fopen (name, "w");
if (fp != NULL)
{
int i;
fprintf (fp, "<html>\n");
fprintf (fp, " <body>\n");
fprintf (fp, " </p>\n");
for (i = 0; i < lignes; i++)
{
fprintf (fp,
"[%8d] The quick brown fox jumps over the lazy dog<br />",
i);
}
fprintf (fp, " </p>\n");
/* requete */
fprintf (fp, " <p>\n");
fprintf (fp, " <a href=\"index.html\">index.html</a>\n");
fprintf (fp, " </p>\n");
fprintf (fp, " </body>\n");
fprintf (fp, "</html>\n");
fclose (fp), fp = NULL;
}
}
/**
* program entry point
* usage: minihttpd [tcp_port]
*/
int main (int argc, char *argv[])
{
#if 1
make_file ("index.html", 1000);
#endif
/* init */
init ();
printf ("init [OK]\n");
/* desinit preparation */
atexit (desinit);
/* listening socket creation */
SOCKET sock = socket (AF_INET, SOCK_STREAM, 0);
if (INVALID_SOCKET == sock)
{
perror ("socket()");
exit (errno);
}
printf ("socket creation [OK]\n");
SOCKADDR_IN sin /*= { 0 }*/ ;
sin.sin_addr.s_addr = htonl (INADDR_ANY);
sin.sin_family = AF_INET;
if (1 == argc)
{
sin.sin_port = htons (DEFAULT_PORT);
}
else
{
sin.sin_port = htons (strtol (argv[1], NULL, 10));
}
if (SOCKET_ERROR == bind (sock, (SOCKADDR *) & sin, sizeof (sin)))
{
perror ("bind()");
exit (errno);
}
printf ("configuration [OK]\n");
/* Listening */
if (SOCKET_ERROR == listen (sock, 1))
{
perror ("listen()");
exit (errno);
}
while (1)
{
/* Acknowledgment */
SOCKADDR_IN csin;
SOCKET csock;
socklen_t sinsize = sizeof csin;
csock = accept (sock, (SOCKADDR *) & csin, &sinsize);
if (INVALID_SOCKET == csock)
{
perror ("accept()");
exit (errno);
}
#ifdef WAIT_QUERY_IN_A_THREAD
{
printf ("WAIT_QUERY_IN_A_THREAD\n");
pthread_t thread;
pthread_create (&thread, NULL, wait_query, &csock);
}
#else
wait_query (&csock);
#endif
}
/* closing listen socket */
closesocket (sock);
printf ("socket closed\n");
return EXIT_SUCCESS;
} |
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