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/*
This file is part of TALER
Copyright (C) 2014, 2015 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file exchange-lib/exchange_api_admin.c
* @brief Implementation of the /admin/ requests of the exchange's HTTP API
* @author Christian Grothoff
*/
#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_json_lib.h>
#include "taler_json_lib.h"
#include "taler_exchange_service.h"
#include "exchange_api_context.h"
#include "exchange_api_handle.h"
#include "taler_signatures.h"
/**
* @brief An admin/add/incoming Handle
*/
struct TALER_EXCHANGE_AdminAddIncomingHandle
{
/**
* The connection to exchange this request handle will use
*/
struct TALER_EXCHANGE_Handle *exchange;
/**
* The url for this request.
*/
char *url;
/**
* JSON encoding of the request to POST.
*/
char *json_enc;
/**
* Handle for the request.
*/
struct MAC_Job *job;
/**
* HTTP headers for the request.
*/
struct curl_slist *headers;
/**
* Function to call with the result.
*/
TALER_EXCHANGE_AdminAddIncomingResultCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Download buffer
*/
struct MAC_DownloadBuffer db;
};
/**
* Function called when we're done processing the
* HTTP /admin/add/incoming request.
*
* @param cls the `struct TALER_EXCHANGE_AdminAddIncomingHandle`
* @param eh the curl request handle
*/
static void
handle_admin_add_incoming_finished (void *cls,
CURL *eh)
{
struct TALER_EXCHANGE_AdminAddIncomingHandle *aai = cls;
long response_code;
json_t *json;
aai->job = NULL;
json = MAC_download_get_result (&aai->db,
eh,
&response_code);
switch (response_code)
{
case 0:
break;
case MHD_HTTP_OK:
break;
case MHD_HTTP_BAD_REQUEST:
/* This should never happen, either us or the exchange is buggy
(or API version conflict); just pass JSON reply to the application */
break;
case MHD_HTTP_FORBIDDEN:
/* Access denied */
break;
case MHD_HTTP_UNAUTHORIZED:
/* Nothing really to verify, exchange says one of the signatures is
invalid; as we checked them, this should never happen, we
should pass the JSON reply to the application */
break;
case MHD_HTTP_NOT_FOUND:
/* Nothing really to verify, this should never
happen, we should pass the JSON reply to the application */
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
/* Server had an internal issue; we should retry, but this API
leaves this to the application */
break;
default:
/* unexpected response code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u\n",
response_code);
GNUNET_break (0);
response_code = 0;
break;
}
aai->cb (aai->cb_cls,
response_code,
json);
json_decref (json);
TALER_EXCHANGE_admin_add_incoming_cancel (aai);
}
/**
* Notify the exchange that we have received an incoming transaction
* which fills a reserve. Note that this API is an administrative
* API and thus not accessible to typical exchange clients, but only
* to the operators of the exchange.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_pub public key of the reserve
* @param amount amount that was deposited
* @param execution_date when did we receive the amount
* @param wire wire details
* @param res_cb the callback to call when the final result for this request is available
* @param res_cb_cls closure for the above callback
* @return NULL
* if the inputs are invalid (i.e. invalid amount).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_AdminAddIncomingHandle *
TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *amount,
struct GNUNET_TIME_Absolute execution_date,
const json_t *wire,
TALER_EXCHANGE_AdminAddIncomingResultCallback res_cb,
void *res_cb_cls)
{
struct TALER_EXCHANGE_AdminAddIncomingHandle *aai;
struct TALER_EXCHANGE_Context *ctx;
json_t *admin_obj;
CURL *eh;
GNUNET_assert (GNUNET_OK ==
GNUNET_TIME_round_abs (&execution_date));
if (GNUNET_YES !=
MAH_handle_is_ready (exchange))
{
GNUNET_break (0);
return NULL;
}
admin_obj = json_pack ("{s:o, s:o," /* reserve_pub/amount */
" s:o, s:O}", /* execution_Date/wire */
"reserve_pub", GNUNET_JSON_from_data (reserve_pub,
sizeof (*reserve_pub)),
"amount", TALER_JSON_from_amount (amount),
"execution_date", GNUNET_JSON_from_time_abs (execution_date),
"wire", wire);
aai = GNUNET_new (struct TALER_EXCHANGE_AdminAddIncomingHandle);
aai->exchange = exchange;
aai->cb = res_cb;
aai->cb_cls = res_cb_cls;
aai->url = MAH_path_to_url (exchange, "/admin/add/incoming");
eh = curl_easy_init ();
GNUNET_assert (NULL != (aai->json_enc =
json_dumps (admin_obj,
JSON_COMPACT)));
json_decref (admin_obj);
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_URL,
aai->url));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDS,
aai->json_enc));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDSIZE,
strlen (aai->json_enc)));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_WRITEFUNCTION,
&MAC_download_cb));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_WRITEDATA,
&aai->db));
ctx = MAH_handle_to_context (exchange);
aai->job = MAC_job_add (ctx,
eh,
GNUNET_YES,
&handle_admin_add_incoming_finished,
aai);
return aai;
}
/**
* Cancel an add incoming. This function cannot be used on a request
* handle if a response is already served for it.
*
* @param aai the admin add incoming request handle
*/
void
TALER_EXCHANGE_admin_add_incoming_cancel (struct TALER_EXCHANGE_AdminAddIncomingHandle *aai)
{
if (NULL != aai->job)
{
MAC_job_cancel (aai->job);
aai->job = NULL;
}
curl_slist_free_all (aai->headers);
GNUNET_free_non_null (aai->db.buf);
GNUNET_free (aai->url);
GNUNET_free (aai->json_enc);
GNUNET_free (aai);
}
/* end of exchange_api_admin.c */
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