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/*
This file is part of TALER
Copyright (C) 2014-2023 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 merchant_api_post_order_claim.c
* @brief Implementation of POST /orders/$ID/claim
* @author Christian Grothoff
* @author Marcello Stanisci
*/
#include "platform.h"
#include <curl/curl.h>
#include <jansson.h>
#include <microhttpd.h> /* just for HTTP status codes */
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_curl_lib.h>
#include "taler_merchant_service.h"
#include "merchant_api_curl_defaults.h"
#include <taler/taler_json_lib.h>
#include <taler/taler_signatures.h>
#include <taler/taler_curl_lib.h>
/**
* Structure representing a POST /orders/$ID/claim operation.
*/
struct TALER_MERCHANT_OrderClaimHandle
{
/**
* Full URL, includes "/orders/$ID/claim".
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_OrderClaimCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
/**
* Minor context that holds body and headers.
*/
struct TALER_CURL_PostContext post_ctx;
};
/**
* Function called when we're done processing the
* POST /orders/$ID/claim request.
*
* @param cls the `struct TALER_MERCHANT_OrderClaimHandle`
* @param response_code HTTP response code, 0 on error
* @param response response body, should be NULL
*/
static void
handle_post_order_claim_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_OrderClaimHandle *och = cls;
const json_t *json = response;
struct TALER_MERCHANT_OrderClaimResponse ocr = {
.hr.http_status = (unsigned int) response_code,
.hr.reply = json
};
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_object_const (
"contract_terms",
&ocr.details.ok.contract_terms),
GNUNET_JSON_spec_fixed_auto (
"sig",
&ocr.details.ok.sig),
GNUNET_JSON_spec_end ()
};
och->job = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Order claimed with status %u\n",
(unsigned int) response_code);
if (MHD_HTTP_OK != response_code)
{
ocr.hr.ec = TALER_JSON_get_error_code (json);
ocr.hr.hint = TALER_JSON_get_error_hint (json);
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Proposal lookup failed with HTTP status code %u/%d\n",
(unsigned int) response_code,
(int) ocr.hr.ec);
och->cb (och->cb_cls,
&ocr);
TALER_MERCHANT_order_claim_cancel (och);
return;
}
if (GNUNET_OK !=
GNUNET_JSON_parse (json,
spec,
NULL, NULL))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Claiming order failed: could not parse JSON response\n");
GNUNET_break_op (0);
ocr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
ocr.hr.http_status = 0;
och->cb (och->cb_cls,
&ocr);
TALER_MERCHANT_order_claim_cancel (och);
return;
}
if (GNUNET_OK !=
TALER_JSON_contract_hash (ocr.details.ok.contract_terms,
&ocr.details.ok.h_contract_terms))
{
GNUNET_break (0);
ocr.hr.ec = TALER_EC_MERCHANT_POST_ORDERS_ID_CLAIM_CLIENT_INTERNAL_FAILURE;
ocr.hr.http_status = 0;
GNUNET_JSON_parse_free (spec);
och->cb (och->cb_cls,
&ocr);
TALER_MERCHANT_order_claim_cancel (och);
return;
}
och->cb (och->cb_cls,
&ocr);
GNUNET_JSON_parse_free (spec);
TALER_MERCHANT_order_claim_cancel (och);
}
struct TALER_MERCHANT_OrderClaimHandle *
TALER_MERCHANT_order_claim (struct GNUNET_CURL_Context *ctx,
const char *backend_url,
const char *order_id,
const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
const struct TALER_ClaimTokenP *claim_token,
TALER_MERCHANT_OrderClaimCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_OrderClaimHandle *och;
json_t *req_obj;
if (NULL == order_id)
{
GNUNET_break (0);
return NULL;
}
req_obj = GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_auto ("nonce",
nonce),
GNUNET_JSON_pack_allow_null (
GNUNET_JSON_pack_data_auto ("token",
claim_token)));
och = GNUNET_new (struct TALER_MERCHANT_OrderClaimHandle);
och->ctx = ctx;
och->cb = cb;
och->cb_cls = cb_cls;
{
char *path;
GNUNET_asprintf (&path,
"orders/%s/claim",
order_id);
och->url = TALER_url_join (backend_url,
path,
NULL);
GNUNET_free (path);
}
if (NULL == och->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
json_decref (req_obj);
GNUNET_free (och);
return NULL;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Claiming order at %s\n",
och->url);
{
CURL *eh;
eh = TALER_MERCHANT_curl_easy_get_ (och->url);
GNUNET_assert (GNUNET_OK ==
TALER_curl_easy_post (&och->post_ctx,
eh,
req_obj));
json_decref (req_obj);
och->job = GNUNET_CURL_job_add2 (ctx,
eh,
och->post_ctx.headers,
&handle_post_order_claim_finished,
och);
GNUNET_assert (NULL != och->job);
}
return och;
}
void
TALER_MERCHANT_order_claim_cancel (struct TALER_MERCHANT_OrderClaimHandle *och)
{
if (NULL != och->job)
{
GNUNET_CURL_job_cancel (och->job);
och->job = NULL;
}
TALER_curl_easy_post_finished (&och->post_ctx);
GNUNET_free (och->url);
GNUNET_free (och);
}
/* end of merchant_api_post_order_claim.c */
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