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/*
This file is part of TALER
Copyright (C) 2014-2018 Inria and GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-auditor-httpd_exchanges.c
* @brief Handle /exchanges requests; returns list of exchanges we audit
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_json_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <pthread.h>
#include "taler_json_lib.h"
#include "taler-auditor-httpd.h"
#include "taler-auditor-httpd_db.h"
#include "taler-auditor-httpd_exchanges.h"
#include "taler-auditor-httpd_parsing.h"
#include "taler-auditor-httpd_responses.h"
/**
* Send confirmation of deposit-confirmation success to client.
*
* @param connection connection to the client
* @param ja array with information about exchanges
* @return MHD result code
*/
static int
reply_exchanges_success (struct MHD_Connection *connection,
json_t *ja)
{
return TAH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_OK,
"{s:o}",
"exchanges", ja);
}
/**
* Add exchange information to the list.
*
* @param[in,out] cls a `json_t *` array to extend
* @param master_pub master public key of an exchange
* @param exchange_url base URL of an exchange
*/
static void
add_exchange (void *cls,
const struct TALER_MasterPublicKeyP *master_pub,
const char *exchange_url)
{
json_t *list = cls;
json_t *obj;
obj = json_pack ("{s:o, s:s}",
"master_pub",
GNUNET_JSON_from_data_auto (master_pub),
"exchange_url",
exchange_url);
GNUNET_assert (NULL != obj);
GNUNET_assert (0 ==
json_array_append_new (list,
obj));
}
/**
* Execute database transaction for /exchanges. Obtains the list. IF
* it returns a non-error code, the transaction logic MUST NOT queue a
* MHD response. IF it returns an hard error, the transaction logic
* MUST queue a MHD response and set @a mhd_ret. IF it returns the
* soft error code, the function MAY be called again to retry and MUST
* not queue a MHD response.
*
* @param cls[in,out] a `json_t *` with an array of exchanges to be created
* @param connection MHD request context
* @param session database session and transaction to use
* @param[out] mhd_ret set to MHD status on error
* @return transaction status
*/
static enum GNUNET_DB_QueryStatus
list_exchanges (void *cls,
struct MHD_Connection *connection,
struct TALER_AUDITORDB_Session *session,
int *mhd_ret)
{
json_t *list = cls;
enum GNUNET_DB_QueryStatus qs;
qs = TAH_plugin->list_exchanges (TAH_plugin->cls,
session,
&add_exchange,
list);
if (GNUNET_DB_STATUS_HARD_ERROR == qs)
{
TALER_LOG_WARNING ("Failed to handle /exchanges in database\n");
*mhd_ret = TAH_RESPONSE_reply_internal_db_error (connection,
TALER_EC_LIST_EXCHANGES_DB_ERROR);
}
return qs;
}
/**
* Handle a "/exchanges" request.
*
* @param rh context of the handler
* @param connection the MHD connection to handle
* @param[in,out] connection_cls the connection's closure (can be updated)
* @param upload_data upload data
* @param[in,out] upload_data_size number of bytes (left) in @a upload_data
* @return MHD result code
*/
int
TAH_EXCHANGES_handler (struct TAH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
int mhd_ret;
json_t *ja;
ja = json_array ();
if (GNUNET_OK !=
TAH_DB_run_transaction (connection,
"list exchanges",
&mhd_ret,
&list_exchanges,
(void *) ja))
return mhd_ret;
return reply_exchanges_success (connection,
ja);
}
/* end of taler-auditor-httpd_deposit-confirmation.c */
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