/*
This file is part of TALER
Copyright (C) 2014-2020 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
*/
/**
* @file lib/merchant_api_post_order_claim.c
* @brief Implementation of POST /orders/$ID/claim
* @author Christian Grothoff
* @author Marcello Stanisci
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include
#include "taler_merchant_service.h"
#include
#include
#include
/**
* Structure representing a POST /orders/$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 json 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;
json_t *contract_terms;
struct TALER_MerchantSignatureP sig;
struct GNUNET_HashCode hash;
const json_t *json = response;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_json ("contract_terms",
&contract_terms),
GNUNET_JSON_spec_fixed_auto ("sig",
&sig),
GNUNET_JSON_spec_end ()
};
struct TALER_MERCHANT_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
och->job = NULL;
if (MHD_HTTP_OK != response_code)
{
hr.ec = TALER_JSON_get_error_code (json);
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) hr.ec);
och->cb (och->cb_cls,
&hr,
NULL,
NULL,
NULL);
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);
hr.ec = TALER_EC_INVALID_RESPONSE;
hr.http_status = 0;
och->cb (och->cb_cls,
&hr,
NULL,
NULL,
NULL);
TALER_MERCHANT_order_claim_cancel (och);
return;
}
if (GNUNET_OK !=
TALER_JSON_contract_hash (contract_terms,
&hash))
{
GNUNET_break (0);
hr.ec = TALER_EC_CLIENT_INTERNAL_FAILURE;
hr.http_status = 0;
GNUNET_JSON_parse_free (spec);
och->cb (och->cb_cls,
&hr,
NULL,
NULL,
NULL);
TALER_MERCHANT_order_claim_cancel (och);
return;
}
och->cb (och->cb_cls,
&hr,
contract_terms,
&sig,
&hash);
GNUNET_JSON_parse_free (spec);
TALER_MERCHANT_order_claim_cancel (och);
}
/**
* Calls the POST /orders/$ID/claim API at the backend. That is,
* retrieve the final contract terms including the client nonce.
*
* This is a PUBLIC API for wallets.
*
* @param ctx execution context
* @param backend_url base URL of the merchant backend
* @param order_id order id used to perform the lookup
* @param nonce nonce to use to claim the proposal
* @param claim_token the token used to verify the claim
* @param cb callback which will work the response gotten from the backend
* @param cb_cls closure to pass to @a cb
* @return handle for this handle, NULL upon errors
*/
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;
req_obj = json_pack ("{s:o}",
"nonce",
GNUNET_JSON_from_data_auto (nonce));
if (NULL == req_obj)
{
GNUNET_break (0);
return NULL;
}
if (NULL != claim_token)
{
GNUNET_assert (0 ==
json_object_set_new (req_obj,
"token",
GNUNET_JSON_from_data_auto (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 = curl_easy_init ();
GNUNET_assert (NULL != eh);
GNUNET_assert (GNUNET_OK ==
TALER_curl_easy_post (&och->post_ctx,
eh,
req_obj));
json_decref (req_obj);
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_URL,
och->url));
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;
}
/**
* Cancel a POST /orders/$ID/claim request.
*
* @param och handle to the request to be canceled
*/
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 */