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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
This file is part of TALER
(C) 2023 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_private-post-token-families.c
* @brief implementing POST /tokenfamilies request handling
* @author Christian Blättler
*/
#include "platform.h"
#include "taler-merchant-httpd_private-post-token-families.h"
#include "taler-merchant-httpd_helper.h"
#include <taler/taler_json_lib.h>
/**
* How often do we retry the simple INSERT database transaction?
*/
#define MAX_RETRIES 3
/**
* Check if the two token families are identical.
*
* @param tf1 token family to compare
* @param tf2 other token family to compare
* @return true if they are 'equal', false if not
*/
static bool
token_families_equal (const struct TALER_MERCHANTDB_TokenFamilyDetails *tf1,
const struct TALER_MERCHANTDB_TokenFamilyDetails *tf2)
{
return ( (0 == strcmp (tf1->slug,
tf2->slug)) &&
(0 == strcmp (tf1->name,
tf2->name)) &&
(0 == strcmp (tf1->description,
tf2->description)) &&
(1 == json_equal (tf1->description_i18n,
tf2->description_i18n)) &&
(GNUNET_TIME_timestamp_cmp (tf1->valid_after,
==,
tf2->valid_after)) &&
(GNUNET_TIME_timestamp_cmp (tf1->valid_before,
==,
tf2->valid_before)) &&
(GNUNET_TIME_relative_cmp (tf1->duration,
==,
tf2->duration)) &&
(tf1->kind == tf2->kind) );
}
MHD_RESULT
TMH_private_post_token_families (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
struct TMH_MerchantInstance *mi = hc->instance;
struct TALER_MERCHANTDB_TokenFamilyDetails details = { 0 };
const char *kind = NULL;
enum GNUNET_DB_QueryStatus qs;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("slug",
(const char **) &details.slug),
GNUNET_JSON_spec_string ("name",
(const char **) &details.name),
GNUNET_JSON_spec_string ("description",
(const char **) &details.description),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_json ("description_i18n",
&details.description_i18n),
NULL),
GNUNET_JSON_spec_string ("kind", &kind),
GNUNET_JSON_spec_timestamp ("valid_after",
&details.valid_after),
GNUNET_JSON_spec_timestamp ("valid_before",
&details.valid_before),
GNUNET_JSON_spec_relative_time ("duration",
&details.duration),
GNUNET_JSON_spec_end ()
};
GNUNET_assert (NULL != mi);
{
enum GNUNET_GenericReturnValue res;
res = TALER_MHD_parse_json_data (connection,
hc->request_body,
spec);
if (GNUNET_OK != res)
{
GNUNET_break_op (0);
return (GNUNET_NO == res)
? MHD_YES
: MHD_NO;
}
}
if (strcmp (kind, "discount") == 0)
details.kind = TALER_MERCHANTDB_TFK_Discount;
else if (strcmp (kind, "subscription") == 0)
details.kind = TALER_MERCHANTDB_TFK_Subscription;
else
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"kind");
}
if (NULL == details.description_i18n)
details.description_i18n = json_object ();
if (! TALER_JSON_check_i18n (details.description_i18n))
{
GNUNET_break_op (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"description_i18n");
}
/* finally, interact with DB until no serialization error */
for (unsigned int i = 0; i<MAX_RETRIES; i++)
{
/* Test if a token family of this id is known */
struct TALER_MERCHANTDB_TokenFamilyDetails existing;
if (GNUNET_OK !=
TMH_db->start (TMH_db->cls,
"/post tokenfamilies"))
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_START_FAILED,
NULL);
}
qs = TMH_db->lookup_token_family (TMH_db->cls,
mi->settings.id,
details.slug,
&existing);
switch (qs)
{
case GNUNET_DB_STATUS_HARD_ERROR:
/* Clean up and fail hard */
GNUNET_break (0);
TMH_db->rollback (TMH_db->cls);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
NULL);
case GNUNET_DB_STATUS_SOFT_ERROR:
/* restart transaction */
goto retry;
case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
/* Good, we can proceed! */
break;
case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
/* idempotency check: is existing == details? */
{
bool eq;
eq = token_families_equal (&details,
&existing);
TALER_MERCHANTDB_token_family_details_free (&existing);
TMH_db->rollback (TMH_db->cls);
GNUNET_JSON_parse_free (spec);
return eq
? TALER_MHD_reply_static (connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0)
: TALER_MHD_reply_with_error (connection,
MHD_HTTP_CONFLICT,
TALER_EC_MERCHANT_POST_TOKEN_FAMILY_CONFLICT,
details.slug);
}
} /* end switch (qs) */
qs = TMH_db->insert_token_family (TMH_db->cls,
mi->settings.id,
details.slug,
&details);
if (GNUNET_DB_STATUS_HARD_ERROR == qs)
{
TMH_db->rollback (TMH_db->cls);
break;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs)
{
qs = TMH_db->commit (TMH_db->cls);
if (GNUNET_DB_STATUS_SOFT_ERROR != qs)
break;
}
retry:
GNUNET_assert (GNUNET_DB_STATUS_SOFT_ERROR == qs);
TMH_db->rollback (TMH_db->cls);
} /* for RETRIES loop */
GNUNET_JSON_parse_free (spec);
if (qs < 0)
{
GNUNET_break (0);
return TALER_MHD_reply_with_error (
connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
(GNUNET_DB_STATUS_SOFT_ERROR == qs)
? TALER_EC_GENERIC_DB_SOFT_FAILURE
: TALER_EC_GENERIC_DB_COMMIT_FAILED,
NULL);
}
return TALER_MHD_reply_static (connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0);
}
/* end of taler-merchant-httpd_private-post-token-families.c */
|
