/*
This file is part of TALER
Copyright (C) 2014-2018, 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 merchant_api_get_product.c
* @brief Implementation of the GET /product/$ID request of the merchant's HTTP API
* @author Christian Grothoff
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include
#include "taler_merchant_service.h"
#include
#include
/**
* Handle for a GET /products/$ID operation.
*/
struct TALER_MERCHANT_ProductGetHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_ProductGetCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Function called when we're done processing the
* HTTP GET /products/$ID request.
*
* @param cls the `struct TALER_MERCHANT_ProductGetHandle`
* @param response_code HTTP response code, 0 on error
* @param response response body, NULL if not in JSON
*/
static void
handle_get_product_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_ProductGetHandle *pgh = cls;
const json_t *json = response;
struct TALER_MERCHANT_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
pgh->job = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Got /products/$ID response with status code %u\n",
(unsigned int) response_code);
switch (response_code)
{
case MHD_HTTP_OK:
{
const char *description;
json_t *description_i18n;
const char *unit;
struct TALER_Amount price;
const char *image;
json_t *taxes;
int64_t total_stock;
uint64_t total_sold;
uint64_t total_lost;
json_t *address;
bool rst_ok = true;
struct GNUNET_TIME_Absolute next_restock = {0};
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("description",
&description),
GNUNET_JSON_spec_json ("description_i18n",
&description_i18n),
GNUNET_JSON_spec_string ("unit",
&unit),
TALER_JSON_spec_amount ("price",
&price),
GNUNET_JSON_spec_string ("image",
&image),
GNUNET_JSON_spec_json ("taxes",
&taxes),
GNUNET_JSON_spec_int64 ("total_stock",
&total_stock),
GNUNET_JSON_spec_uint64 ("total_sold",
&total_sold),
GNUNET_JSON_spec_uint64 ("total_lost",
&total_lost),
GNUNET_JSON_spec_json ("address",
&address),
GNUNET_JSON_spec_end ()
};
if (NULL !=
json_object_get (json,
"next_restock"))
{
struct GNUNET_JSON_Specification spect[] = {
TALER_JSON_spec_absolute_time ("next_restock",
&next_restock),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (json,
spect,
NULL, NULL))
rst_ok = false;
}
if ( (rst_ok) &&
(GNUNET_OK ==
GNUNET_JSON_parse (json,
spec,
NULL, NULL)) )
{
pgh->cb (pgh->cb_cls,
&hr,
description,
description_i18n,
unit,
&price,
image,
taxes,
total_stock,
total_sold,
total_lost,
address,
next_restock);
GNUNET_JSON_parse_free (spec);
TALER_MERCHANT_product_get_cancel (pgh);
return;
}
hr.http_status = 0;
hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
GNUNET_JSON_parse_free (spec);
break;
}
case MHD_HTTP_UNAUTHORIZED:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
/* Nothing really to verify, merchant says we need to authenticate. */
break;
case MHD_HTTP_NOT_FOUND:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
default:
/* unexpected response code */
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d\n",
(unsigned int) response_code,
(int) hr.ec);
break;
}
pgh->cb (pgh->cb_cls,
&hr,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
0,
0,
0,
NULL,
GNUNET_TIME_UNIT_FOREVER_ABS);
TALER_MERCHANT_product_get_cancel (pgh);
}
struct TALER_MERCHANT_ProductGetHandle *
TALER_MERCHANT_product_get (
struct GNUNET_CURL_Context *ctx,
const char *backend_url,
const char *product_id,
TALER_MERCHANT_ProductGetCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_ProductGetHandle *pgh;
CURL *eh;
pgh = GNUNET_new (struct TALER_MERCHANT_ProductGetHandle);
pgh->ctx = ctx;
pgh->cb = cb;
pgh->cb_cls = cb_cls;
{
char *path;
GNUNET_asprintf (&path,
"private/products/%s",
product_id);
pgh->url = TALER_url_join (backend_url,
path,
NULL);
GNUNET_free (path);
}
if (NULL == pgh->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
GNUNET_free (pgh);
return NULL;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Requesting URL '%s'\n",
pgh->url);
eh = curl_easy_init ();
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_URL,
pgh->url));
pgh->job = GNUNET_CURL_job_add (ctx,
eh,
&handle_get_product_finished,
pgh);
return pgh;
}
void
TALER_MERCHANT_product_get_cancel (
struct TALER_MERCHANT_ProductGetHandle *pgh)
{
if (NULL != pgh->job)
GNUNET_CURL_job_cancel (pgh->job);
GNUNET_free (pgh->url);
GNUNET_free (pgh);
}