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/*
This file is part of TALER
(C) 2014, 2015, 2016 INRIA
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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file backend/taler-merchant-httpd_history.c
* @brief HTTP serving layer mainly intended to communicate with the frontend
* @author Marcello Stanisci
*/
#include "platform.h"
#include <jansson.h>
#include <taler/taler_signatures.h>
#include <taler/taler_json_lib.h>
#include "taler-merchant-httpd.h"
#include "taler-merchant-httpd_responses.h"
/**
* Index to the first row to return in response to /history.
*/
static int start = -1;
/**
* How many rows we are to return in response to /history.
*/
static unsigned int delta;
/**
* Function called with information about a transaction.
*
* @param cls closure
* @param order_id transaction's order ID.
* @param row_id serial numer of the transaction in the table,
* used as index by the frontend to skip previous results.
*/
static void
pd_cb (void *cls,
const char *order_id,
uint64_t row_id,
const json_t *proposal_data)
{
json_t *response = cls;
json_t *entry;
json_t *amount;
json_t *timestamp;
json_t *instance;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"/history's row_id: %llu\n",
row_id);
GNUNET_assert (-1 != json_unpack ((json_t *) proposal_data,
"{s:o, s:o, s:{s:o}}",
"amount", &amount,
"timestamp", ×tamp,
"merchant", "instance", &instance));
GNUNET_break (NULL != (entry = json_pack ("{s:I, s:s, s:O, s:O, s:O}",
"row_id", row_id,
"order_id", order_id,
"amount", amount,
"timestamp", timestamp,
"instance", instance)));
GNUNET_break (0 == json_array_append_new (response,
entry));
}
/**
* Manage a /history request. Query the db and returns transactions
* younger than the date given as parameter
*
* @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
MH_handler_history (struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
void **connection_cls,
const char *upload_data,
size_t *upload_data_size)
{
#define LOG_INFO(...) GNUNET_log (GNUNET_ERROR_TYPE_INFO, __VA_ARGS__)
const char *str;
struct GNUNET_TIME_Absolute date;
json_t *response;
unsigned int ret;
unsigned long long seconds;
struct MerchantInstance *mi;
response = json_array (); /*FIXME who decrefs this?*/
str = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"date");
date = GNUNET_TIME_absolute_get ();
if (NULL != str)
{
if (1 != sscanf (str, "%llu", &seconds))
{
json_decref (response);
return TMH_RESPONSE_reply_arg_invalid (connection,
TALER_EC_PARAMETER_MALFORMED,
"date");
}
date.abs_value_us = seconds * 1000LL * 1000LL;
if (date.abs_value_us / 1000LL / 1000LL != seconds)
{
json_decref (response);
return TMH_RESPONSE_reply_bad_request (connection,
TALER_EC_HISTORY_TIMESTAMP_OVERFLOW,
"Timestamp overflowed");
}
}
mi = TMH_lookup_instance ("default");
str = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"instance");
if (NULL != str)
mi = TMH_lookup_instance (str);
if (NULL == mi)
{
json_decref (response);
return TMH_RESPONSE_reply_not_found (connection,
TALER_EC_HISTORY_INSTANCE_UNKNOWN,
"instance");
}
delta = 20;
str = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"start");
if (NULL != str)
{
if ((1 != sscanf (str, "%d", &start)) ||
start < 0)
{
json_decref (response);
return TMH_RESPONSE_reply_arg_invalid (connection,
TALER_EC_PARAMETER_MALFORMED,
"start");
}
}
str = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"delta");
if (NULL != str)
{
if ((1 != sscanf (str, "%d", &delta)) ||
delta < 0)
return TMH_RESPONSE_reply_arg_invalid (connection,
TALER_EC_PARAMETER_MALFORMED,
"delta");
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Querying history back to %s\n",
GNUNET_STRINGS_absolute_time_to_string (date));
if (0 > start)
ret = db->find_proposal_data_by_date (db->cls,
date,
&mi->pubkey,
delta,
pd_cb,
response);
else
ret = db->find_proposal_data_by_date_and_range (db->cls,
date,
&mi->pubkey,
start,
delta,
pd_cb,
response);
if (GNUNET_SYSERR == ret)
{
json_decref (response);
return TMH_RESPONSE_reply_internal_error (connection,
TALER_EC_HISTORY_DB_FETCH_ERROR,
"db error to get history");
}
ret = TMH_RESPONSE_reply_json (connection,
response,
MHD_HTTP_OK);
json_decref (response);
return ret;
}
/* end of taler-merchant-httpd_history.c */
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