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/*
This file is part of TALER
Copyright (C) 2024 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/donau_api_csr_post.c
* @brief Implementation of the "handle" component of the donau's HTTP API
* @author Lukas Matyja
*/
#include <gnunet/gnunet_curl_lib.h>
#include <taler/taler_json_lib.h>
#include <taler/taler_curl_lib.h>
#include "donau_service.h"
#include "donau_api_curl_defaults.h"
#include "donau_json_lib.h"
/**
* Handle for a POST /csr-issue request.
*/
struct DONAU_CsRBatchIssueHandle
{
/**
* The url for the /csr-issue request.
*/
char *url;
/**
* Minor context that holds body and headers.
*/
struct TALER_CURL_PostContext post_ctx;
/**
* Entry for this request with the `struct GNUNET_CURL_Context`.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
DONAU_CsRBatchIssueCallback cb;
/**
* Closure to pass to @e cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Function called when we're done processing the
* HTTP POST /csr-issue request.
*
* @param cls the `struct KeysRequest`
* @param response_code HTTP response code, 0 on error
* @param resp_obj parsed JSON result, NULL on error
*/
static void
handle_csr_issue_post_finished (void *cls,
long response_code,
const void *resp_obj)
{
struct DONAU_CsRBatchIssueHandle *csrh = cls;
const json_t *j = resp_obj;
struct DONAU_CsRBatchIssueResponse csrresp = {
.hr.reply = j,
.hr.http_status = (unsigned int) response_code
};
csrh->job = NULL;
switch (response_code)
{
case MHD_HTTP_CREATED:
struct GNUNET_JSON_Specification spec[] = {
TALER_JSON_spec_exchange_withdraw_values ( // TODO: method for GNUNET
"ewv",
(struct TALER_ExchangeWithdrawValues *) &csrresp.details.ok.alg_values),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (j,
spec,
NULL,
NULL))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not parse response from csr POST\n");
GNUNET_break_op (0);
}
csrh->cb (csrh->cb_cls,
&csrresp);
break;
// Donation unit was revoked.
case MHD_HTTP_GONE:
csrresp.hr.ec = TALER_JSON_get_error_code (j);
csrresp.hr.hint = TALER_JSON_get_error_hint (j);
break;
// Donation unit or endpoint not found.
case MHD_HTTP_NOT_FOUND:
csrresp.hr.ec = TALER_JSON_get_error_code (j);
csrresp.hr.hint = TALER_JSON_get_error_hint (j);
break;
case MHD_HTTP_BAD_REQUEST:
csrresp.hr.ec = TALER_JSON_get_error_code (j);
csrresp.hr.hint = TALER_JSON_get_error_hint (j);
break;
default:
/* unexpected response code */
GNUNET_break_op (0);
csrresp.hr.ec = TALER_JSON_get_error_code (j);
csrresp.hr.hint = TALER_JSON_get_error_hint (j);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d for POST %s\n",
(unsigned int) response_code,
(int) csrresp.hr.ec,
csrh->url);
break;
}
if (NULL != csrh->cb)
{
csrh->cb (csrh->cb_cls,
&csrresp);
csrh->cb = NULL;
}
DONAU_csr_cancel (csrh);
}
struct DONAU_CsRBatchIssueHandle *
DONAU_csr_issue (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct DONAU_DonationUnitPublicKey *pk,
const struct GNUNET_CRYPTO_CsSessionNonce *nonce,
DONAU_CsRBatchIssueCallback cb,
void *cb_cls)
{
struct DONAU_CsRBatchIssueHandle *csrh;
CURL *eh;
json_t *body;
struct DONAU_DonationUnitHashP h_donation_unit_pub;
DONAU_donation_unit_pub_hash (pk,
&h_donation_unit_pub);
TALER_LOG_DEBUG ("Connecting to the donau (%s)\n",
url);
csrh = GNUNET_new (struct DONAU_CsRBatchIssueHandle);
csrh->url = GNUNET_strdup (url);
csrh->cb = cb;
csrh->cb_cls = cb_cls;
csrh->ctx = ctx;
csrh->url = TALER_url_join (url,
"csr-issue",
NULL);
if (NULL == csrh->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct requested URL.\n");
GNUNET_free (csrh);
return NULL;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Request CS R with URL `%s'.\n",
csrh->url);
body = GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_varsize ("nonce",
nonce,
sizeof(*nonce)),
GNUNET_JSON_pack_data_varsize ("du_pub_hash",
&h_donation_unit_pub,
sizeof(h_donation_unit_pub)));
eh = DONAU_curl_easy_get_ (csrh->url);
if ( (NULL == eh) ||
(GNUNET_OK !=
TALER_curl_easy_post (&csrh->post_ctx,
eh,
body)) )
{
GNUNET_break (0);
if (NULL != eh)
curl_easy_cleanup (eh);
json_decref (body);
GNUNET_free (csrh->url);
return NULL;
}
json_decref (body);
csrh->job = GNUNET_CURL_job_add2 (ctx,
eh,
csrh->post_ctx.headers,
&handle_csr_issue_post_finished,
csrh);
return csrh;
}
void
DONAU_csr_cancel (
struct DONAU_CsRBatchIssueHandle *csrh)
{
if (NULL != csrh->job)
{
GNUNET_CURL_job_cancel (csrh->job);
csrh->job = NULL;
}
TALER_curl_easy_post_finished (&csrh->post_ctx);
GNUNET_free (csrh->url);
GNUNET_free (csrh);
}
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