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/*
This file is part of libmicrohttpd
Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff
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 lib/response_from_callback.c
* @brief implementation of MHD_response_from_callback()
* @author Christian Grothoff
*/
#include "internal.h"
/**
* Create a response action. The response object can be extended with
* header information and then be used any number of times.
*
* @param sc status code to return
* @param size size of the data portion of the response, #MHD_SIZE_UNKNOWN for unknown
* @param block_size preferred block size for querying crc (advisory only,
* MHD may still call @a crc using smaller chunks); this
* is essentially the buffer size used for IO, clients
* should pick a value that is appropriate for IO and
* memory performance requirements
* @param crc callback to use to obtain response data
* @param crc_cls extra argument to @a crc
* @param crfc callback to call to free @a crc_cls resources
* @return NULL on error (i.e. invalid arguments, out of memory)
* @ingroup response
*/
struct MHD_Response *
MHD_response_from_callback (enum MHD_HTTP_StatusCode sc,
uint64_t size,
size_t block_size,
MHD_ContentReaderCallback crc,
void *crc_cls,
MHD_ContentReaderFreeCallback crfc)
{
struct MHD_Response *response;
mhd_assert (NULL != crc);
mhd_assert (0 != block_size);
if (NULL ==
(response = MHD_calloc_ (1,
sizeof (struct MHD_Response) +
block_size)))
return NULL;
response->fd = -1;
response->status_code = sc;
response->data = (void *) &response[1];
response->data_buffer_size = block_size;
if (! MHD_mutex_init_ (&response->mutex))
{
free (response);
return NULL;
}
response->crc = crc;
response->crfc = crfc;
response->crc_cls = crc_cls;
response->reference_count = 1;
response->total_size = size;
return response;
}
/* end of response_from_callback.c */
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