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/*
This file is part of TALER
Copyright (C) 2020 Taler Systems SA
TALER 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, 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with
TALER; see the file COPYING.LGPL. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file lib/merchant_api_common.c
* @brief Implementation of common logic for libtalermerchant
* @author Christian Grothoff
*/
#include "platform.h"
#include <curl/curl.h>
#include <jansson.h>
#include <microhttpd.h> /* just for HTTP status codes */
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_curl_lib.h>
#include "taler_merchant_service.h"
#include <taler/taler_json_lib.h>
/**
* Take a @a response from the merchant API that (presumably) contains
* error details and setup the corresponding @a hr structure. Internally
* used to convert merchant's responses in to @a hr.
*
* @param response, if NULL we will report #TALER_EC_INVALID_RESPONSE in `ec
* @param http_status http status to use
* @param[out] hr response object to initialize, fields will
* only be valid as long as @a response is valid as well
*/
void
TALER_MERCHANT_parse_error_details_ (const json_t *response,
unsigned int http_status,
struct TALER_MERCHANT_HttpResponse *hr)
{
const json_t *jc;
memset (hr, 0, sizeof (*hr));
hr->reply = response;
hr->http_status = http_status;
if (NULL == response)
{
hr->ec = TALER_EC_INVALID_RESPONSE;
return;
}
hr->ec = TALER_JSON_get_error_code (response);
hr->hint = TALER_JSON_get_error_hint (response);
/* handle 'exchange-http-status' */
jc = json_object_get (response,
"exchange-http-status");
/* The caller already knows that the JSON represents an error,
so we are dealing with a missing error code here. */
if (NULL == jc)
return; /* no need to bother with exchange-code/hint if we had no status */
if (! json_is_integer (jc))
{
GNUNET_break_op (0);
return;
}
hr->exchange_http_status = (unsigned int) json_integer_value (jc);
/* handle 'exchange-reply' */
jc = json_object_get (response,
"exchange-reply");
if (! json_is_object (jc))
{
GNUNET_break_op (0);
}
else
{
hr->exchange_reply = jc;
}
/* handle 'exchange-code' */
jc = json_object_get (response,
"exchange-code");
/* The caller already knows that the JSON represents an error,
so we are dealing with a missing error code here. */
if (NULL == jc)
return; /* no need to bother with exchange-hint if we had no code */
if (! json_is_integer (jc))
{
GNUNET_break_op (0);
hr->exchange_code = TALER_EC_INVALID;
}
else
{
hr->exchange_code = (enum TALER_ErrorCode) json_integer_value (jc);
}
/* handle 'exchange-hint' */
jc = json_object_get (response,
"exchange-hint");
/* The caller already knows that the JSON represents an error,
so we are dealing with a missing error code here. */
if (NULL == jc)
return;
if (! json_is_string (jc))
{
GNUNET_break_op (0);
}
else
{
hr->exchange_hint = json_string_value (jc);
}
}
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