/*
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
*/
/**
* @file lib/merchant_api_post_order_paid.c
* @brief Implementation of the POST /order/$ID/paid request
* of the merchant's HTTP API
* @author Jonathan Buchanan
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include
#include "taler_merchant_service.h"
#include
#include
#include
#include
/**
* @brief Handle to a POST /orders/$ID/paid operation at a merchant.
*/
struct TALER_MERCHANT_OrderPaidHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_OrderPaidCallback paid_cb;
/**
* Closure for @a paid_cb.
*/
void *paid_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
* HTTP /paid request.
*
* @param cls the `struct TALER_MERCHANT_OrderPaidHandle`
* @param response_code HTTP response code, 0 on error
* @param json response body, NULL if not in JSON
*/
static void
handle_paid_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_OrderPaidHandle *oph = cls;
const json_t *json = response;
struct TALER_MERCHANT_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
oph->job = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"/paid completed with response code %u\n",
(unsigned int) response_code);
switch (response_code)
{
case 0:
hr.ec = TALER_EC_INVALID_RESPONSE;
break;
case MHD_HTTP_NO_CONTENT:
break;
case MHD_HTTP_BAD_REQUEST:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* This should never happen, either us
* or the merchant is buggy (or API version conflict);
* just pass JSON reply to the application */
break;
case MHD_HTTP_FORBIDDEN:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* The signature provided was invalid */
break;
case MHD_HTTP_NOT_FOUND:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* Nothing really to verify, this should never
happen, we should pass the JSON reply to the
application */
break;
case MHD_HTTP_CONFLICT:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* The hashed contract terms don't match with the order_id. */
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* Server had an internal issue; we should retry,
but this API leaves this to the application */
break;
case MHD_HTTP_SERVICE_UNAVAILABLE:
TALER_MERCHANT_parse_error_details_ (json,
response_code,
&hr);
/* Exchange couldn't respond properly; the retry is
left to the application */
break;
default:
TALER_MERCHANT_parse_error_details_ (json,
response_code,
&hr);
/* unexpected response code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d\n",
(unsigned int) response_code,
(int) hr.ec);
GNUNET_break_op (0);
break;
}
oph->paid_cb (oph->paid_cb_cls,
&hr);
TALER_MERCHANT_order_paid_cancel (oph);
}
/**
* Send proof of payment to a merchant.
*
* This is a PUBLIC API, albeit in this form useful for the frontend,
* in case the frontend is proxying the request.
*
* @param ctx execution context
* @param merchant_url base URL of the merchant
* @param order_id which order should be paid
* @param session_id session to pay for, or NULL for none
* @param h_contract_terms hash of the contract terms
* @param merchant_sig signature from the merchant
* affirming payment, or NULL on errors
* @param paid_cb the callback to call when a reply for this request is available
* @param paid_cb_cls closure for @a paid_cb
* @return a handle for this request
*/
struct TALER_MERCHANT_OrderPaidHandle *
TALER_MERCHANT_order_paid (
struct GNUNET_CURL_Context *ctx,
const char *merchant_url,
const char *order_id,
const char *session_id,
const struct GNUNET_HashCode *h_contract_terms,
const struct TALER_MerchantSignatureP *merchant_sig,
TALER_MERCHANT_OrderPaidCallback paid_cb,
void *paid_cb_cls)
{
struct TALER_MERCHANT_OrderPaidHandle *oph;
json_t *req_obj;
req_obj = json_pack ("{s:o, s:o, s:s}",
"sig",
GNUNET_JSON_from_data_auto (merchant_sig),
"h_contract",
GNUNET_JSON_from_data_auto (h_contract_terms),
"session_id",
session_id);
if (NULL == req_obj)
{
GNUNET_break (0);
return NULL;
}
oph = GNUNET_new (struct TALER_MERCHANT_OrderPaidHandle);
oph->ctx = ctx;
oph->paid_cb = paid_cb;
oph->paid_cb_cls = paid_cb_cls;
{
char *path;
GNUNET_asprintf (&path,
"orders/%s/paid",
order_id);
oph->url = TALER_url_join (merchant_url,
path,
NULL);
GNUNET_free (path);
}
if (NULL == oph->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
json_decref (req_obj);
GNUNET_free (oph);
return NULL;
}
{
CURL *eh;
eh = curl_easy_init ();
if (GNUNET_OK !=
TALER_curl_easy_post (&oph->post_ctx,
eh,
req_obj))
{
GNUNET_break (0);
json_decref (req_obj);
GNUNET_free (oph);
return NULL;
}
json_decref (req_obj);
GNUNET_assert (CURLE_OK == curl_easy_setopt (eh,
CURLOPT_URL,
oph->url));
oph->job = GNUNET_CURL_job_add2 (ctx,
eh,
oph->post_ctx.headers,
&handle_paid_finished,
oph);
}
return oph;
}
/**
* Cancel POST /orders/$ID/paid operation.
*
* @param oph operation to cancel
*/
void
TALER_MERCHANT_order_paid_cancel (
struct TALER_MERCHANT_OrderPaidHandle *oph)
{
if (NULL != oph->job)
{
GNUNET_CURL_job_cancel (oph->job);
oph->job = NULL;
}
TALER_curl_easy_post_finished (&oph->post_ctx);
GNUNET_free (oph->url);
GNUNET_free (oph);
}
/* end of merchant_api_post_order_paid.c */