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/*
This file is part of Anastasis
Copyright (C) 2020, 2021, 2024 Anastasis SARL
Anastasis is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
Anastasis 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file backend/anastasis-httpd_config.c
* @brief headers for /terms handler
* @author Christian Grothoff
* @author Dennis Neufeld
* @author Dominik Meister
*/
#include "platform.h"
#include <jansson.h>
#include "anastasis-httpd_config.h"
#include "anastasis-httpd.h"
#include <taler/taler_json_lib.h>
#include "anastasis_authorization_lib.h"
/**
* Add enabled methods and their fees to the ``/config`` response.
*
* @param[in,out] cls a `json_t` array to build
* @param section configuration section to inspect
*/
static void
add_methods (void *cls,
const char *section)
{
json_t *method_arr = cls;
struct ANASTASIS_AuthorizationPlugin *p;
json_t *method;
if (0 != strncasecmp (section,
"authorization-",
strlen ("authorization-")))
return;
if (GNUNET_YES !=
GNUNET_CONFIGURATION_get_value_yesno (AH_cfg,
section,
"ENABLED"))
return;
section += strlen ("authorization-");
p = ANASTASIS_authorization_plugin_load (section,
db,
AH_cfg);
if (NULL == p)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to load authorization plugin `%s'\n",
section);
return;
}
method = GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("type",
section),
TALER_JSON_pack_amount ("cost",
&p->cost));
GNUNET_assert (
0 ==
json_array_append_new (method_arr,
method));
}
MHD_RESULT
AH_handler_config (struct AH_RequestHandler *rh,
struct MHD_Connection *connection)
{
static struct MHD_Response *response;
static struct GNUNET_TIME_Absolute a;
if ( (GNUNET_TIME_absolute_is_past (a)) &&
(NULL != response) )
{
MHD_destroy_response (response);
response = NULL;
}
if (NULL == response)
{
json_t *method_arr = json_array ();
struct GNUNET_TIME_Timestamp km;
char dat[128];
GNUNET_assert (NULL != method_arr);
a = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_DAYS);
/* Round up to next full day to ensure the expiration
time does not become a fingerprint! */
a = GNUNET_TIME_absolute_round_down (a,
GNUNET_TIME_UNIT_DAYS);
a = GNUNET_TIME_absolute_add (a,
GNUNET_TIME_UNIT_DAYS);
/* => /config response stays at most 48h in caches! */
km = GNUNET_TIME_absolute_to_timestamp (a);
TALER_MHD_get_date_string (km.abs_time,
dat);
{
json_t *method;
method = GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("type",
"question"),
TALER_JSON_pack_amount ("cost",
&AH_question_cost));
GNUNET_assert (
0 ==
json_array_append_new (method_arr,
method));
}
GNUNET_CONFIGURATION_iterate_sections (AH_cfg,
&add_methods,
method_arr);
response = TALER_MHD_MAKE_JSON_PACK (
GNUNET_JSON_pack_string ("name",
"anastasis"),
GNUNET_JSON_pack_string ("version",
"0:2:0"),
GNUNET_JSON_pack_string ("implementation",
"urn:net:taler:specs:anastasis:c-reference"),
GNUNET_JSON_pack_string ("business_name",
AH_business_name),
GNUNET_JSON_pack_array_steal ("methods",
method_arr),
GNUNET_JSON_pack_uint64 ("storage_limit_in_megabytes",
AH_upload_limit_mb),
TALER_JSON_pack_amount ("annual_fee",
&AH_annual_fee),
TALER_JSON_pack_amount ("truth_upload_fee",
&AH_truth_upload_fee),
TALER_JSON_pack_amount ("liability_limit",
&AH_insurance),
GNUNET_JSON_pack_data_auto ("provider_salt",
&AH_provider_salt));
GNUNET_break (MHD_YES ==
MHD_add_response_header (response,
MHD_HTTP_HEADER_EXPIRES,
dat));
GNUNET_break (MHD_YES ==
MHD_add_response_header (response,
MHD_HTTP_HEADER_CACHE_CONTROL,
"public,max-age=21600")); /* 6h */
}
return MHD_queue_response (connection,
MHD_HTTP_OK,
response);
}
/* end of anastasis-httpd_config.c */
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