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/*
This file is part of TALER
Copyright (C) 2015, 2016, 2017 Taler Systems SA
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, see
<http://www.gnu.org/licenses/>
*/
/**
* @file bank-lib/bank_api_reject.c
* @brief Implementation of the /reject request of the bank's HTTP API
* @author Christian Grothoff
*/
#include "platform.h"
#include "bank_api_common.h"
#include <microhttpd.h> /* just for HTTP status codes */
#include "taler_signatures.h"
/**
* @brief A /reject Handle
*/
struct TALER_BANK_RejectHandle
{
/**
* 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 authentication-related headers for the request.
*/
struct curl_slist *authh;
/**
* Function to call with the result.
*/
TALER_BANK_RejectResultCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
};
/**
* Function called when we're done processing the
* HTTP /reject request.
*
* @param cls the `struct TALER_BANK_RejectHandle`
* @param response_code HTTP response code, 0 on error
* @param response parsed JSON result, NULL on error
*/
static void
handle_reject_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_BANK_RejectHandle *rh = cls;
enum TALER_ErrorCode ec;
const json_t *j = response;
rh->job = NULL;
switch (response_code)
{
case 0:
ec = TALER_EC_INVALID_RESPONSE;
break;
case MHD_HTTP_OK:
GNUNET_break_op (0);
response_code = 0;
ec = TALER_EC_INVALID_RESPONSE;
break;
case MHD_HTTP_NO_CONTENT:
ec = TALER_EC_NONE;
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 */
ec = TALER_BANK_parse_ec_ (j);
break;
case MHD_HTTP_FORBIDDEN:
/* Access denied */
ec = TALER_BANK_parse_ec_ (j);
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 */
ec = TALER_BANK_parse_ec_ (j);
break;
case MHD_HTTP_NOT_FOUND:
/* Nothing really to verify, this should never
happen, we should pass the JSON reply to the application */
ec = TALER_BANK_parse_ec_ (j);
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
/* Server had an internal issue; we should retry, but this API
leaves this to the application */
ec = TALER_BANK_parse_ec_ (j);
break;
default:
/* unexpected response code */
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u\n",
(unsigned int) response_code);
GNUNET_break (0);
ec = TALER_BANK_parse_ec_ (j);
response_code = 0;
break;
}
rh->cb (rh->cb_cls,
response_code,
ec);
TALER_BANK_reject_cancel (rh);
}
/**
* Request rejection of a wire transfer, marking it as cancelled and voiding
* its effects.
*
* @param ctx curl context for the event loop
* @param bank_base_url URL of the bank (used to execute this request)
* @param auth authentication data to use
* @param account_number which account number should we query
* @param rowid transfer to reject
* @param rcb the callback to call with the operation result
* @param rcb_cls closure for @a rcb
* @return NULL
* if the inputs are invalid.
* In this case, the callback is not called.
*/
struct TALER_BANK_RejectHandle *
TALER_BANK_reject (struct GNUNET_CURL_Context *ctx,
const char *bank_base_url,
const struct TALER_BANK_AuthenticationData *auth,
uint64_t account_number,
uint64_t rowid,
TALER_BANK_RejectResultCallback rcb,
void *rcb_cls)
{
struct TALER_BANK_RejectHandle *rh;
json_t *reject_obj;
CURL *eh;
reject_obj = json_pack ("{s:{s:s}, s:I, s:I}",
"auth", "type", "basic",
"row_id", (json_int_t) rowid,
"account_number", (json_int_t) account_number);
if (NULL == reject_obj)
{
GNUNET_break (0);
return NULL;
}
rh = GNUNET_new (struct TALER_BANK_RejectHandle);
rh->cb = rcb;
rh->cb_cls = rcb_cls;
rh->request_url = TALER_BANK_path_to_url_ (bank_base_url,
"/reject");
rh->authh = TALER_BANK_make_auth_header_ (auth);
/* Append content type header here, can't do it in GNUNET_CURL_job_add
as that would override the CURLOPT_HTTPHEADER instead of appending. */
{
struct curl_slist *ext;
ext = curl_slist_append (rh->authh,
"Content-Type: application/json");
if (NULL == ext)
GNUNET_break (0);
else
rh->authh = ext;
}
eh = curl_easy_init ();
GNUNET_assert (NULL != (rh->json_enc =
json_dumps (reject_obj,
JSON_COMPACT)));
json_decref (reject_obj);
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_HTTPHEADER,
rh->authh));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_URL,
rh->request_url));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDS,
rh->json_enc));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDSIZE,
strlen (rh->json_enc)));
rh->job = GNUNET_CURL_job_add (ctx,
eh,
GNUNET_NO,
&handle_reject_finished,
rh);
return rh;
}
/**
* Cancel an reject request. This function cannot be used on a request
* handle if the response was is already served for it.
*
* @param rh the reject request handle
*/
void
TALER_BANK_reject_cancel (struct TALER_BANK_RejectHandle *rh)
{
if (NULL != rh->job)
{
GNUNET_CURL_job_cancel (rh->job);
rh->job = NULL;
}
curl_slist_free_all (rh->authh);
GNUNET_free (rh->request_url);
GNUNET_free (rh->json_enc);
GNUNET_free (rh);
}
/* end of bank_api_reject.c */
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