iterate_login_tokens.c (5765B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2025 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file src/backenddb/iterate_login_tokens.c 18 * @brief Implementation of the iterate_login_tokens function for Postgres 19 * @author Iván Ávalos 20 */ 21 #include "platform.h" 22 #include <taler/taler_pq_lib.h> 23 #include "merchant-database/iterate_login_tokens.h" 24 #include "helper.h" 25 26 27 /** 28 * Hard upper bound on the number of records returned by a single 29 * call, regardless of the limit requested by the client. 30 */ 31 #define MAX_RECORDS 50000 32 33 34 /** 35 * Context used for TALER_MERCHANTDB_iterate_products(). 36 */ 37 struct LookupLoginTokensContext 38 { 39 /** 40 * Function to call with the results. 41 */ 42 TALER_MERCHANTDB_LoginTokensCallback cb; 43 44 /** 45 * Closure for @a cb. 46 */ 47 void *cb_cls; 48 49 /** 50 * Did database result extraction fail? 51 */ 52 bool extract_failed; 53 }; 54 55 56 /** 57 * Function to be called with the results of a SELECT statement 58 * that has returned @a num_results results about products. 59 * 60 * @param[in,out] cls of type `struct LookupProductsContext *` 61 * @param result the postgres result 62 * @param num_results the number of results in @a result 63 */ 64 static void 65 lookup_login_tokens_cb (void *cls, 66 PGresult *result, 67 unsigned int num_results) 68 { 69 struct LookupLoginTokensContext *plc = cls; 70 71 for (unsigned int i = 0; i < num_results; i++) 72 { 73 uint32_t validity_scope; 74 uint64_t serial; 75 struct GNUNET_TIME_Timestamp expiration_time; 76 struct GNUNET_TIME_Timestamp creation_time; 77 char *description; 78 struct TALER_MERCHANTDB_LoginTokenP token; 79 struct GNUNET_PQ_ResultSpec rs[] = { 80 GNUNET_PQ_result_spec_auto_from_type ("token", 81 &token), 82 GNUNET_PQ_result_spec_uint32 ("validity_scope", 83 &validity_scope), 84 GNUNET_PQ_result_spec_string ("description", 85 &description), 86 GNUNET_PQ_result_spec_timestamp ("creation_time", 87 &creation_time), 88 GNUNET_PQ_result_spec_timestamp ("expiration_time", 89 &expiration_time), 90 GNUNET_PQ_result_spec_uint64 ("serial", 91 &serial), 92 GNUNET_PQ_result_spec_end 93 }; 94 95 if (GNUNET_OK != 96 GNUNET_PQ_extract_result (result, 97 rs, 98 i)) 99 { 100 GNUNET_break (0); 101 plc->extract_failed = true; 102 return; 103 } 104 plc->cb (plc->cb_cls, 105 creation_time, 106 expiration_time, 107 validity_scope, 108 description, 109 serial); 110 GNUNET_PQ_cleanup_result (rs); 111 } 112 } 113 114 115 enum GNUNET_DB_QueryStatus 116 TALER_MERCHANTDB_iterate_login_tokens ( 117 struct TALER_MERCHANTDB_PostgresContext *pg, 118 const char *instance_id, 119 uint64_t offset, 120 int64_t limit, 121 TALER_MERCHANTDB_LoginTokensCallback cb, 122 void *cb_cls) 123 { 124 struct GNUNET_TIME_Timestamp now = GNUNET_TIME_timestamp_get (); 125 uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 126 TALER_MERCHANTDB_abs_limit (limit)); 127 struct LookupLoginTokensContext plc = { 128 .cb = cb, 129 .cb_cls = cb_cls, 130 /* Can be overwritten by the lookup_products_cb */ 131 .extract_failed = false, 132 }; 133 struct GNUNET_PQ_QueryParam params[] = { 134 GNUNET_PQ_query_param_timestamp (&now), 135 GNUNET_PQ_query_param_uint64 (&offset), 136 GNUNET_PQ_query_param_uint64 (&plimit), 137 GNUNET_PQ_query_param_end 138 }; 139 enum GNUNET_DB_QueryStatus qs; 140 141 GNUNET_assert (NULL != pg->current_merchant_id); 142 GNUNET_assert (0 == strcmp (instance_id, 143 pg->current_merchant_id)); 144 if (limit > 0) 145 { 146 TMH_PQ_prepare_anon (pg, 147 "SELECT" 148 " token" 149 ",serial" 150 ",creation_time" 151 ",expiration_time" 152 ",validity_scope" 153 ",description" 154 " FROM merchant_login_tokens" 155 " WHERE expiration_time > $1" 156 " AND serial > $2" 157 " ORDER BY serial ASC" 158 " LIMIT $3"); 159 } 160 else 161 { 162 TMH_PQ_prepare_anon (pg, 163 "SELECT" 164 " token" 165 ",serial" 166 ",creation_time" 167 ",expiration_time" 168 ",validity_scope" 169 ",description" 170 " FROM merchant_login_tokens" 171 " WHERE expiration_time > $1" 172 " AND serial < $2" 173 " ORDER BY serial DESC" 174 " LIMIT $3"); 175 } 176 qs = GNUNET_PQ_eval_prepared_multi_select ( 177 pg->conn, 178 "", 179 params, 180 &lookup_login_tokens_cb, 181 &plc); 182 /* If there was an error inside lookup_products_cb, return a hard error. */ 183 if (plc.extract_failed) 184 return GNUNET_DB_STATUS_HARD_ERROR; 185 return qs; 186 }