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81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*
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This file is part of libmicrohttpd
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Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file lib/response_from_callback.c
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* @brief implementation of MHD_response_from_callback()
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* @author Christian Grothoff
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*/
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#include "internal.h"
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/**
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* Create a response action. The response object can be extended with
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* header information and then be used any number of times.
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*
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* @param sc status code to return
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* @param size size of the data portion of the response, #MHD_SIZE_UNKNOWN for unknown
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* @param block_size preferred block size for querying crc (advisory only,
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* MHD may still call @a crc using smaller chunks); this
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* is essentially the buffer size used for IO, clients
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* should pick a value that is appropriate for IO and
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* memory performance requirements
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* @param crc callback to use to obtain response data
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* @param crc_cls extra argument to @a crc
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* @param crfc callback to call to free @a crc_cls resources
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* @return NULL on error (i.e. invalid arguments, out of memory)
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* @ingroup response
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*/
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struct MHD_Response *
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MHD_response_from_callback (enum MHD_HTTP_StatusCode sc,
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uint64_t size,
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size_t block_size,
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MHD_ContentReaderCallback crc,
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void *crc_cls,
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MHD_ContentReaderFreeCallback crfc)
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{
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struct MHD_Response *response;
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mhd_assert (NULL != crc);
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mhd_assert (0 != block_size);
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if (NULL ==
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(response = MHD_calloc_ (1,
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sizeof (struct MHD_Response)
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+ block_size)))
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return NULL;
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response->fd = -1;
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response->status_code = sc;
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response->data = (void *) &response[1];
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response->data_buffer_size = block_size;
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if (! MHD_mutex_init_ (&response->mutex))
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{
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free (response);
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return NULL;
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}
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response->crc = crc;
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response->crfc = crfc;
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response->crc_cls = crc_cls;
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response->reference_count = 1;
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response->total_size = size;
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return response;
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}
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/* end of response_from_callback.c */
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