1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
This file is part of TALER
(C) 2019, 2020, 2021, 2023, 2024 Taler Systems SA
TALER 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.
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 taler-merchant-httpd_config.c
* @brief implement API for querying configuration data of the backend
* @author Florian Dold
*/
#include "platform.h"
#include <jansson.h>
#include <taler/taler_util.h>
#include <taler/taler_json_lib.h>
#include "taler-merchant-httpd.h"
#include "taler-merchant-httpd_mhd.h"
#include "taler-merchant-httpd_exchanges.h"
/**
* Taler protocol version in the format CURRENT:REVISION:AGE
* as used by GNU libtool. See
* https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
*
* Please be very careful when updating and follow
* https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html#Updating-version-info
* precisely. Note that this version has NOTHING to do with the
* release version, and the format is NOT the same that semantic
* versioning uses either.
*
* When changing this version, you likely want to also update
* #MERCHANT_PROTOCOL_CURRENT and #MERCHANT_PROTOCOL_AGE in
* merchant_api_config.c!
*/
#define MERCHANT_PROTOCOL_VERSION "15:0:11"
/**
* Callback on an exchange known to us. Does not warrant
* that the "keys" information is actually available for
* @a exchange.
*
* @param cls closure with `json_t *` array to expand
* @param url base URL of the exchange
* @param exchange internal handle for the exchange
*/
static void
add_exchange (void *cls,
const char *url,
const struct TMH_Exchange *exchange)
{
json_t *xa = cls;
json_t *xi;
xi = GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_auto ("master_pub",
TMH_EXCHANGES_get_master_pub (exchange)),
GNUNET_JSON_pack_string ("currency",
TMH_EXCHANGES_get_currency (exchange)),
GNUNET_JSON_pack_string ("base_url",
url));
GNUNET_assert (NULL != xi);
GNUNET_assert (0 ==
json_array_append_new (xa,
xi));
}
MHD_RESULT
MH_handler_config (struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
static struct MHD_Response *response;
static struct GNUNET_TIME_Absolute a;
(void) rh;
(void) hc;
if ( (GNUNET_TIME_absolute_is_past (a)) &&
(NULL != response) )
{
MHD_destroy_response (response);
response = NULL;
}
if (NULL == response)
{
json_t *specs = json_object ();
json_t *exchanges = json_array ();
struct GNUNET_TIME_Timestamp km;
char dat[128];
GNUNET_assert (NULL != specs);
GNUNET_assert (NULL != exchanges);
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);
TMH_exchange_get_trusted (&add_exchange,
exchanges);
for (unsigned int i = 0; i<TMH_num_cspecs; i++)
{
const struct TALER_CurrencySpecification *cspec = &TMH_cspecs[i];
if (TMH_test_exchange_configured_for_currency (cspec->currency))
GNUNET_assert (0 ==
json_object_set_new (specs,
cspec->currency,
TALER_CONFIG_currency_specs_to_json
(
cspec)));
}
response = TALER_MHD_MAKE_JSON_PACK (
GNUNET_JSON_pack_string ("currency",
TMH_currency),
GNUNET_JSON_pack_object_steal ("currencies",
specs),
GNUNET_JSON_pack_array_steal ("exchanges",
exchanges),
GNUNET_JSON_pack_string (
"implementation",
"urn:net:taler:specs:taler-merchant:c-reference"),
GNUNET_JSON_pack_string ("name",
"taler-merchant"),
GNUNET_JSON_pack_string ("version",
MERCHANT_PROTOCOL_VERSION));
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 taler-merchant-httpd_config.c */
|
