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/*
This file is part of libmicrohttpd
Copyright (C) 2007, 2008 Christian Grothoff (and other contributing authors)
Copyright (C) 2014-2022 Evgeny Grin (Karlson2k)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file fileserver_example_external_select.c
* @brief minimal example for how to use libmicrohttpd to server files
* @author Christian Grothoff
* @author Karlson2k (Evgeny Grin)
*/
#include "platform.h"
#include <microhttpd.h>
#include <sys/stat.h>
#include <unistd.h>
#define PAGE \
"<html><head><title>File not found</title></head><body>File not found</body></html>"
static ssize_t
file_reader (void *cls, uint64_t pos, char *buf, size_t max)
{
FILE *file = (FILE *) cls;
size_t bytes_read;
/* 'fseek' may not support files larger 2GiB, depending on platform.
* For production code, make sure that 'pos' has valid values, supported by
* 'fseek', or use 'fseeko' or similar function. */
if (0 != fseek (file, (long) pos, SEEK_SET))
return MHD_CONTENT_READER_END_WITH_ERROR;
bytes_read = fread (buf, 1, max, file);
if (0 == bytes_read)
return (0 != ferror (file)) ? MHD_CONTENT_READER_END_WITH_ERROR :
MHD_CONTENT_READER_END_OF_STREAM;
return (ssize_t) bytes_read;
}
static void
free_callback (void *cls)
{
FILE *file = cls;
fclose (file);
}
static enum MHD_Result
ahc_echo (void *cls,
struct MHD_Connection *connection,
const char *url,
const char *method,
const char *version,
const char *upload_data,
size_t *upload_data_size, void **req_cls)
{
static int aptr;
struct MHD_Response *response;
enum MHD_Result ret;
FILE *file;
int fd;
struct stat buf;
(void) cls; /* Unused. Silent compiler warning. */
(void) version; /* Unused. Silent compiler warning. */
(void) upload_data; /* Unused. Silent compiler warning. */
(void) upload_data_size; /* Unused. Silent compiler warning. */
if (0 != strcmp (method, MHD_HTTP_METHOD_GET))
return MHD_NO; /* unexpected method */
if (&aptr != *req_cls)
{
/* do never respond on first call */
*req_cls = &aptr;
return MHD_YES;
}
*req_cls = NULL; /* reset when done */
file = fopen (&url[1], "rb");
if (NULL != file)
{
fd = fileno (file);
if (-1 == fd)
{
(void) fclose (file);
return MHD_NO; /* internal error */
}
if ( (0 != fstat (fd, &buf)) ||
(! S_ISREG (buf.st_mode)) )
{
/* not a regular file, refuse to serve */
fclose (file);
file = NULL;
}
}
if (NULL == file)
{
response = MHD_create_response_from_buffer_static (strlen (PAGE),
PAGE);
ret = MHD_queue_response (connection, MHD_HTTP_NOT_FOUND, response);
MHD_destroy_response (response);
}
else
{
response = MHD_create_response_from_callback ((size_t) buf.st_size,
32 * 1024, /* 32k page size */
&file_reader,
file,
&free_callback);
if (NULL == response)
{
fclose (file);
return MHD_NO;
}
ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
MHD_destroy_response (response);
}
return ret;
}
int
main (int argc, char *const *argv)
{
struct MHD_Daemon *d;
time_t end;
time_t t;
struct timeval tv;
fd_set rs;
fd_set ws;
fd_set es;
MHD_socket max;
uint64_t mhd_timeout;
int port;
if (argc != 3)
{
printf ("%s PORT SECONDS-TO-RUN\n", argv[0]);
return 1;
}
port = atoi (argv[1]);
if ( (1 > port) || (port > 65535) )
{
fprintf (stderr,
"Port must be a number between 1 and 65535.\n");
return 1;
}
d = MHD_start_daemon (MHD_USE_ERROR_LOG,
(uint16_t) port,
NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
if (d == NULL)
return 1;
end = time (NULL) + atoi (argv[2]);
while ((t = time (NULL)) < end)
{
#if ! defined(_WIN32) || defined(__CYGWIN__)
tv.tv_sec = end - t;
#else /* Native W32 */
tv.tv_sec = (long) (end - t);
#endif /* Native W32 */
tv.tv_usec = 0;
max = 0;
FD_ZERO (&rs);
FD_ZERO (&ws);
FD_ZERO (&es);
if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &max))
break; /* fatal internal error */
if (MHD_get_timeout64 (d, &mhd_timeout) == MHD_YES)
{
if (((uint64_t) tv.tv_sec) < mhd_timeout / 1000LL)
{
#if ! defined(_WIN32) || defined(__CYGWIN__)
tv.tv_sec = (time_t) (mhd_timeout / 1000LL);
#else /* Native W32 */
tv.tv_sec = (long) (mhd_timeout / 1000LL);
#endif /* Native W32 */
tv.tv_usec = ((long) (mhd_timeout % 1000)) * 1000;
}
}
if (-1 == select ((int) max + 1, &rs, &ws, &es, &tv))
{
if (EINTR != errno)
abort ();
}
MHD_run (d);
}
MHD_stop_daemon (d);
return 0;
}
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