skeleton for GET /purses/ client
This commit is contained in:
Christian Grothoff
parent
1002ac13e4
commit
ae2f1ced8b
244
src/lib/exchange_api_purses_get.c
Normal file
244
src/lib/exchange_api_purses_get.c
Normal file
@ -0,0 +1,244 @@
|
|||||||
|
/*
|
||||||
|
This file is part of TALER
|
||||||
|
Copyright (C) 2022 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 lib/exchange_api_purses_get.c
|
||||||
|
* @brief Implementation of the /purses/ GET request
|
||||||
|
* @author Christian Grothoff
|
||||||
|
*/
|
||||||
|
#include "platform.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_json_lib.h"
|
||||||
|
#include "taler_exchange_service.h"
|
||||||
|
#include "exchange_api_handle.h"
|
||||||
|
#include "taler_signatures.h"
|
||||||
|
#include "exchange_api_curl_defaults.h"
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief A Contract Get Handle
|
||||||
|
*/
|
||||||
|
struct TALER_EXCHANGE_PursesGetHandle
|
||||||
|
{
|
||||||
|
|
||||||
|
/**
|
||||||
|
* The connection to exchange this request handle will use
|
||||||
|
*/
|
||||||
|
struct TALER_EXCHANGE_Handle *exchange;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* The url for this request.
|
||||||
|
*/
|
||||||
|
char *url;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Handle for the request.
|
||||||
|
*/
|
||||||
|
struct GNUNET_CURL_Job *job;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Function to call with the result.
|
||||||
|
*/
|
||||||
|
TALER_EXCHANGE_PurseGetCallback cb;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Closure for @a cb.
|
||||||
|
*/
|
||||||
|
void *cb_cls;
|
||||||
|
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Function called when we're done processing the
|
||||||
|
* HTTP /purses/$PID GET request.
|
||||||
|
*
|
||||||
|
* @param cls the `struct TALER_EXCHANGE_PursesGetHandle`
|
||||||
|
* @param response_code HTTP response code, 0 on error
|
||||||
|
* @param response parsed JSON result, NULL on error
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
handle_purse_get_finished (void *cls,
|
||||||
|
long response_code,
|
||||||
|
const void *response)
|
||||||
|
{
|
||||||
|
struct TALER_EXCHANGE_PursesGetHandle *cgh = cls;
|
||||||
|
const json_t *j = response;
|
||||||
|
struct TALER_EXCHANGE_PurseGetResponse dr = {
|
||||||
|
.hr.reply = j,
|
||||||
|
.hr.http_status = (unsigned int) response_code
|
||||||
|
};
|
||||||
|
|
||||||
|
cgh->job = NULL;
|
||||||
|
switch (response_code)
|
||||||
|
{
|
||||||
|
case 0:
|
||||||
|
dr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
|
||||||
|
break;
|
||||||
|
case MHD_HTTP_OK:
|
||||||
|
{
|
||||||
|
struct GNUNET_JSON_Specification spec[] = {
|
||||||
|
GNUNET_JSON_spec_timestamp ("merge_timestamp",
|
||||||
|
&dr.details.success.merge_timestamp),
|
||||||
|
GNUNET_JSON_spec_timestamp ("deposit_timestamp",
|
||||||
|
&dr.details.success.deposit_timestamp),
|
||||||
|
GNUNET_JSON_spec_end ()
|
||||||
|
};
|
||||||
|
|
||||||
|
if (GNUNET_OK !=
|
||||||
|
GNUNET_JSON_parse (j,
|
||||||
|
spec,
|
||||||
|
NULL, NULL))
|
||||||
|
{
|
||||||
|
GNUNET_break_op (0);
|
||||||
|
dr.hr.http_status = 0;
|
||||||
|
dr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
cgh->cb (cgh->cb_cls,
|
||||||
|
&dr);
|
||||||
|
TALER_EXCHANGE_purse_get_cancel (cgh);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
case MHD_HTTP_BAD_REQUEST:
|
||||||
|
dr.hr.ec = TALER_JSON_get_error_code (j);
|
||||||
|
dr.hr.hint = TALER_JSON_get_error_hint (j);
|
||||||
|
/* 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:
|
||||||
|
dr.hr.ec = TALER_JSON_get_error_code (j);
|
||||||
|
dr.hr.hint = TALER_JSON_get_error_hint (j);
|
||||||
|
/* 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:
|
||||||
|
dr.hr.ec = TALER_JSON_get_error_code (j);
|
||||||
|
dr.hr.hint = TALER_JSON_get_error_hint (j);
|
||||||
|
/* Exchange does not know about transaction;
|
||||||
|
we should pass the reply to the application */
|
||||||
|
break;
|
||||||
|
case MHD_HTTP_INTERNAL_SERVER_ERROR:
|
||||||
|
dr.hr.ec = TALER_JSON_get_error_code (j);
|
||||||
|
dr.hr.hint = TALER_JSON_get_error_hint (j);
|
||||||
|
/* Server had an internal issue; we should retry, but this API
|
||||||
|
leaves this to the application */
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
/* unexpected response code */
|
||||||
|
dr.hr.ec = TALER_JSON_get_error_code (j);
|
||||||
|
dr.hr.hint = TALER_JSON_get_error_hint (j);
|
||||||
|
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
|
||||||
|
"Unexpected response code %u/%d for exchange GET purses\n",
|
||||||
|
(unsigned int) response_code,
|
||||||
|
(int) dr.hr.ec);
|
||||||
|
GNUNET_break_op (0);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
cgh->cb (cgh->cb_cls,
|
||||||
|
&dr);
|
||||||
|
TALER_EXCHANGE_purse_get_cancel (cgh);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
struct TALER_EXCHANGE_PursesGetHandle *
|
||||||
|
TALER_EXCHANGE_purse_get (
|
||||||
|
struct TALER_EXCHANGE_Handle *exchange,
|
||||||
|
const struct TALER_PurseContractPrivateKeyP *purse_priv,
|
||||||
|
struct GNUNET_TIME_Relative merge_timeout,
|
||||||
|
struct GNUNET_TIME_Relative deposit_timeout,
|
||||||
|
TALER_EXCHANGE_PurseGetCallback cb,
|
||||||
|
void *cb_cls)
|
||||||
|
{
|
||||||
|
struct TALER_EXCHANGE_PursesGetHandle *cgh;
|
||||||
|
CURL *eh;
|
||||||
|
struct TALER_PurseContractPublicKeyP purse_pub;
|
||||||
|
char arg_str[sizeof (purse_pub) * 2 + 48];
|
||||||
|
|
||||||
|
if (GNUNET_YES !=
|
||||||
|
TEAH_handle_is_ready (exchange))
|
||||||
|
{
|
||||||
|
GNUNET_break (0);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
cgh = GNUNET_new (struct TALER_EXCHANGE_PursesGetHandle);
|
||||||
|
cgh->exchange = exchange;
|
||||||
|
cgh->cb = cb;
|
||||||
|
cgh->cb_cls = cb_cls;
|
||||||
|
GNUNET_CRYPTO_ecdhe_key_get_public (&purse_priv->ecdhe_priv,
|
||||||
|
&purse_pub.ecdhe_pub);
|
||||||
|
{
|
||||||
|
char cpub_str[sizeof (purse_pub) * 2];
|
||||||
|
char *end;
|
||||||
|
|
||||||
|
end = GNUNET_STRINGS_data_to_string (&purse_pub,
|
||||||
|
sizeof (purse_pub),
|
||||||
|
cpub_str,
|
||||||
|
sizeof (cpub_str));
|
||||||
|
*end = '\0';
|
||||||
|
GNUNET_snprintf (arg_str,
|
||||||
|
sizeof (arg_str),
|
||||||
|
"/purses/%s",
|
||||||
|
cpub_str);
|
||||||
|
}
|
||||||
|
|
||||||
|
cgh->url = TEAH_path_to_url (exchange,
|
||||||
|
arg_str);
|
||||||
|
if (NULL == cgh->url)
|
||||||
|
{
|
||||||
|
GNUNET_free (cgh);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
eh = TALER_EXCHANGE_curl_easy_get_ (cgh->url);
|
||||||
|
if (NULL == eh)
|
||||||
|
{
|
||||||
|
GNUNET_break (0);
|
||||||
|
GNUNET_free (cgh->url);
|
||||||
|
GNUNET_free (cgh);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
/* FIXME: add signature with purse_priv
|
||||||
|
to authorize the GET request!? Or
|
||||||
|
decide it is non-critical and only
|
||||||
|
pass purse_pub? */
|
||||||
|
cgh->job = GNUNET_CURL_job_add (TEAH_handle_to_context (exchange),
|
||||||
|
eh,
|
||||||
|
&handle_purse_get_finished,
|
||||||
|
cgh);
|
||||||
|
return cgh;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void
|
||||||
|
TALER_EXCHANGE_purse_get_cancel (
|
||||||
|
struct TALER_EXCHANGE_PursesGetHandle *cgh)
|
||||||
|
{
|
||||||
|
if (NULL != cgh->job)
|
||||||
|
{
|
||||||
|
GNUNET_CURL_job_cancel (cgh->job);
|
||||||
|
cgh->job = NULL;
|
||||||
|
}
|
||||||
|
GNUNET_free (cgh->url);
|
||||||
|
GNUNET_free (cgh);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* end of exchange_api_purses_get.c */
|
||||||
Loading…
Reference in New Issue
Block a user