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/*
This file is part of TALER
Copyright (C) 2014, 2015, 2016, 2017, 2019 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_refund.c
* @brief Implementation of the /refund POST and GET
* @author Christian Grothoff
* @author Marcello Stanisci
*/
#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>
#include <taler/taler_signatures.h>
#include <taler/taler_curl_lib.h>
struct TALER_MERCHANT_RefundLookupOperation
{
/**
* URL of the request, includes parameters
*/
char *url;
/**
* Handle of the request
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the response
*/
TALER_MERCHANT_RefundLookupCallback cb;
/**
* Closure for cb
*/
void *cb_cls;
/**
* Reference to the execution context
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Cancel a /refund lookup operation
*
* @param rlo operation to cancel
*/
void
TALER_MERCHANT_refund_lookup_cancel (
struct TALER_MERCHANT_RefundLookupOperation *rlo)
{
if (NULL != rlo->job)
{
GNUNET_CURL_job_cancel (rlo->job);
rlo->job = NULL;
}
GNUNET_free (rlo->url);
GNUNET_free (rlo);
}
/**
* Process GET /refund response
*
* @param cls a `struct TALER_MERCHANT_RefundLookupOperation *`
* @param response_code HTTP status, 0 for HTTP failure
* @param response a `const json_t *` with the JSON of the HTTP body
*/
static void
handle_refund_lookup_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_RefundLookupOperation *rlo = cls;
const json_t *json = response;
struct TALER_MERCHANT_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
rlo->job = NULL;
switch (response_code)
{
case 0:
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Backend didn't even return from GET /refund\n");
hr.ec = TALER_EC_INVALID_RESPONSE;
break;
case MHD_HTTP_OK:
/* nothing to do, all good! */
break;
case MHD_HTTP_NOT_FOUND:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
default:
GNUNET_break_op (0); /* unexpected status code */
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
}
rlo->cb (rlo->cb_cls,
&hr);
TALER_MERCHANT_refund_lookup_cancel (rlo);
}
/**
* Does a GET /refund.
*
* @param ctx execution context
* @param backend_url base URL of the merchant backend
* @param order_id order id used to perform the lookup
* @param cb callback which will work the response gotten from the backend
* @param cb_cls closure to pass to the callback
* @return handle for this operation, NULL upon errors
*/
struct TALER_MERCHANT_RefundLookupOperation *
TALER_MERCHANT_refund_lookup (struct GNUNET_CURL_Context *ctx,
const char *backend_url,
const char *order_id,
TALER_MERCHANT_RefundLookupCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_RefundLookupOperation *rlo;
CURL *eh;
rlo = GNUNET_new (struct TALER_MERCHANT_RefundLookupOperation);
rlo->ctx = ctx;
rlo->cb = cb;
rlo->cb_cls = cb_cls;
rlo->url = TALER_url_join (backend_url,
"refund",
"order_id",
order_id,
NULL);
eh = curl_easy_init ();
if (CURLE_OK != curl_easy_setopt (eh,
CURLOPT_URL,
rlo->url))
{
GNUNET_break (0);
GNUNET_free (rlo->url);
GNUNET_free (rlo);
return NULL;
}
rlo->job = GNUNET_CURL_job_add (ctx,
eh,
GNUNET_NO,
handle_refund_lookup_finished,
rlo);
if (NULL == rlo->job)
{
GNUNET_free (rlo->url);
GNUNET_free (rlo);
GNUNET_break (0);
return NULL;
}
return rlo;
}
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