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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/action_from_response.c
* @brief implementation of #MHD_action_from_response()
* @author Christian Grothoff
*/
#include "internal.h"
/**
* A response was given as the desired action for a @a request.
* Queue the response for the request.
*
* @param cls the `struct MHD_Response`
* @param request the request we are processing
* @return #MHD_SC_OK on success
*/
static enum MHD_StatusCode
response_action (void *cls,
struct MHD_Request *request)
{
struct MHD_Response *response = cls;
struct MHD_Daemon *daemon = request->daemon;
/* If daemon was shut down in parallel,
* response will be aborted now or on later stage. */
if (daemon->shutdown)
return MHD_SC_DAEMON_ALREADY_SHUTDOWN;
#ifdef UPGRADE_SUPPORT
if ( (NULL != response->upgrade_handler) &&
daemon->disallow_upgrade )
{
#ifdef HAVE_MESSAGES
MHD_DLOG (daemon,
MHD_SC_UPGRADE_ON_DAEMON_WITH_UPGRADE_DISALLOWED,
_("Attempted 'upgrade' connection on daemon without MHD_ALLOW_UPGRADE option!\n"));
#endif
return MHD_SC_UPGRADE_ON_DAEMON_WITH_UPGRADE_DISALLOWED;
}
#endif /* UPGRADE_SUPPORT */
request->response = response;
#if defined(_MHD_HAVE_SENDFILE)
if ( (-1 == response->fd)
#if HTTPS_SUPPORT
|| (NULL != daemon->tls_api)
#endif
)
request->resp_sender = MHD_resp_sender_std;
else
request->resp_sender = MHD_resp_sender_sendfile;
#endif /* _MHD_HAVE_SENDFILE */
if ( (MHD_METHOD_HEAD == request->method) ||
(MHD_HTTP_OK > response->status_code) ||
(MHD_HTTP_NO_CONTENT == response->status_code) ||
(MHD_HTTP_NOT_MODIFIED == response->status_code) )
{
/* if this is a "HEAD" request, or a status code for
which a body is not allowed, pretend that we
have already sent the full message body. */
request->response_write_position = response->total_size;
}
if ( (MHD_REQUEST_HEADERS_PROCESSED == request->state) &&
( (MHD_METHOD_POST == request->method) ||
(MHD_METHOD_PUT == request->method) ) )
{
/* response was queued "early", refuse to read body / footers or
further requests! */
request->connection->read_closed = true;
request->state = MHD_REQUEST_FOOTERS_RECEIVED;
}
if (! request->in_idle)
(void) MHD_connection_handle_idle (request->connection);
return MHD_SC_OK;
}
/**
* Converts a @a response to an action. If @a consume
* is set, the reference to the @a response is consumed
* by the conversion. If @a consume is #MHD_NO, then
* the response can be converted to actions in the future.
* However, the @a response is frozen by this step and
* must no longer be modified (i.e. by setting headers).
*
* @param response response to convert, not NULL
* @param destroy_after_use should the response object be consumed?
* @return corresponding action, never returns NULL
*
* Implementation note: internally, this is largely just
* a cast (and possibly an RC increment operation),
* as a response *is* an action. As no memory is
* allocated, this operation cannot fail.
*/
_MHD_EXTERN struct MHD_Action *
MHD_action_from_response (struct MHD_Response *response,
enum MHD_Bool destroy_after_use)
{
response->action.action = &response_action;
response->action.action_cls = response;
if (! destroy_after_use)
{
MHD_mutex_lock_chk_ (&response->mutex);
response->reference_count++;
MHD_mutex_unlock_chk_ (&response->mutex);
}
return &response->action;
}
/* end of action_from_response */
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