src/examples/chunked_example.c

/*
     This file is part of libmicrohttpd
     Copyright (C) 2015 Christian Grothoff (and other contributing authors)

     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 chunked_example.c
 * @brief example for generating chunked encoding with libmicrohttpd
 * @author Christian Grothoff
 */

#include "platform.h"
#include <microhttpd.h>


static ssize_t
callback (void *cls,
          uint64_t pos,
          char *buf,
          size_t max)
{
  return MHD_CONTENT_READER_END_OF_STREAM;
}



static int
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 **ptr)
{
  static int aptr;
  struct MHD_Response *response;
  int ret;

  if (0 != strcmp (method, "GET"))
    return MHD_NO;              /* unexpected method */
  if (&aptr != *ptr)
    {
      /* do never respond on first call */
      *ptr = &aptr;
      return MHD_YES;
    }
  *ptr = NULL;                  /* reset when done */
  response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
                                                1024,
                                                &callback,
                                                NULL,
                                                NULL);
  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;

  if (argc != 2)
    {
      printf ("%s PORT\n", argv[0]);
      return 1;
    }
  d = MHD_start_daemon (// MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG | MHD_USE_POLL,
			MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG,
			// MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG | MHD_USE_POLL,
			// MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
                        atoi (argv[1]),
                        NULL, NULL, &ahc_echo, NULL,
			MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 120,
			MHD_OPTION_END);
  if (d == NULL)
    return 1;
  (void) getc (stdin);
  MHD_stop_daemon (d);
  return 0;
}