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/*
This file is part of TALER
Copyright (C) 2015, 2016 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 bank-lib/bank_api_admin.c
* @brief Implementation of the /admin/ requests of the bank'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 <gnunet/gnunet_curl_lib.h>
#include "taler_bank_service.h"
#include "taler_json_lib.h"
#include "taler_signatures.h"
/**
* @brief An admin/add/incoming Handle
*/
struct TALER_BANK_AdminAddIncomingHandle
{
/**
* The url for this request.
*/
char *request_url;
/**
* JSON encoding of the request to POST.
*/
char *json_enc;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* HTTP headers for the request.
*/
struct curl_slist *headers;
/**
* Function to call with the result.
*/
TALER_BANK_AdminAddIncomingResultCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
};
/**
* Obtain the URL to use for an API request.
*
* @param u base URL of the bank
* @param path Taler API path (i.e. "/reserve/withdraw")
* @return the full URI to use with cURL
*/
static char *
path_to_url (const char *u,
const char *path)
{
char *url;
if ( ('/' == path[0]) &&
(0 < strlen (u)) &&
('/' == u[strlen (u) - 1]) )
path++; /* avoid generating URL with "//" from concat */
GNUNET_asprintf (&url,
"%s%s",
u,
path);
return url;
}
/**
* Function called when we're done processing the
* HTTP /admin/add/incoming request.
*
* @param cls the `struct TALER_BANK_AdminAddIncomingHandle`
* @param response_code HTTP response code, 0 on error
* @param json parsed JSON result, NULL on error
*/
static void
handle_admin_add_incoming_finished (void *cls,
long response_code,
const json_t *json)
{
struct TALER_BANK_AdminAddIncomingHandle *aai = cls;
aai->job = NULL;
switch (response_code)
{
case 0:
break;
case MHD_HTTP_OK:
break;
case MHD_HTTP_BAD_REQUEST:
/* This should never happen, either us or the bank 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, bank 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);
TALER_BANK_admin_add_incoming_cancel (aai);
}
/**
* Notify the bank 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 bank clients, but only
* to the operators of the bank.
*
* @param ctx curl context for the event loop
* @param bank_base_url URL of the bank
* @param reserve_pub public key of the reserve
* @param amount amount that was deposited
* @param execution_date when did we receive the amount
* @param debit_account_no account number to withdraw from (53 bits at most)
* @param credit_account_no account number to deposit into (53 bits at most)
* @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_BANK_AdminAddIncomingHandle *
TALER_BANK_admin_add_incoming (struct GNUNET_CURL_Context *ctx,
const char *bank_base_url,
const struct TALER_WireTransferIdentifierRawP *wtid,
const struct TALER_Amount *amount,
uint64_t debit_account_no,
uint64_t credit_account_no,
TALER_BANK_AdminAddIncomingResultCallback res_cb,
void *res_cb_cls)
{
struct TALER_BANK_AdminAddIncomingHandle *aai;
json_t *admin_obj;
CURL *eh;
admin_obj = json_pack ("{s:o, s:o,"
" s:I, s:I}",
"wtid", GNUNET_JSON_from_data (wtid,
sizeof (*wtid)), /* #4340 */
"amount", TALER_JSON_from_amount (amount),
"debit_account", (json_int_t) debit_account_no,
"credit_account", (json_int_t) credit_account_no);
aai = GNUNET_new (struct TALER_BANK_AdminAddIncomingHandle);
aai->cb = res_cb;
aai->cb_cls = res_cb_cls;
aai->request_url = path_to_url (bank_base_url,
"/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->request_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)));
aai->job = GNUNET_CURL_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_BANK_admin_add_incoming_cancel (struct TALER_BANK_AdminAddIncomingHandle *aai)
{
if (NULL != aai->job)
{
GNUNET_CURL_job_cancel (aai->job);
aai->job = NULL;
}
curl_slist_free_all (aai->headers);
GNUNET_free (aai->request_url);
GNUNET_free (aai->json_enc);
GNUNET_free (aai);
}
/* end of bank_api_admin.c */
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