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635 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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4 | * OIDplus 2.0 |
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1086 | daniel-mar | 5 | * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft |
635 | daniel-mar | 6 | * |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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8 | * you may not use this file except in compliance with the License. |
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9 | * You may obtain a copy of the License at |
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10 | * |
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11 | * http://www.apache.org/licenses/LICENSE-2.0 |
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12 | * |
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13 | * Unless required by applicable law or agreed to in writing, software |
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14 | * distributed under the License is distributed on an "AS IS" BASIS, |
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15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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16 | * See the License for the specific language governing permissions and |
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17 | * limitations under the License. |
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18 | */ |
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19 | |||
1050 | daniel-mar | 20 | namespace ViaThinkSoft\OIDplus; |
635 | daniel-mar | 21 | |
1086 | daniel-mar | 22 | // phpcs:disable PSR1.Files.SideEffects |
23 | \defined('INSIDE_OIDPLUS') or die; |
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24 | // phpcs:enable PSR1.Files.SideEffects |
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25 | |||
635 | daniel-mar | 26 | class OIDplusDatabaseConnectionPDO extends OIDplusDatabaseConnection { |
1130 | daniel-mar | 27 | /** |
28 | * @var mixed|null |
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29 | */ |
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635 | daniel-mar | 30 | private $conn = null; |
1130 | daniel-mar | 31 | |
32 | /** |
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33 | * @var string|null |
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34 | */ |
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635 | daniel-mar | 35 | private $last_error = null; // we need that because PDO divides prepared statement errors and normal query errors, but we have only one "error()" method |
1130 | daniel-mar | 36 | |
37 | /** |
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38 | * @var bool |
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39 | */ |
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635 | daniel-mar | 40 | private $transactions_supported = false; |
41 | |||
1116 | daniel-mar | 42 | /** |
1455 | daniel-mar | 43 | * @var array |
1453 | daniel-mar | 44 | */ |
45 | private $prepare_cache = []; |
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46 | |||
47 | /** |
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1116 | daniel-mar | 48 | * @param string $sql |
49 | * @param array|null $prepared_args |
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50 | * @return OIDplusQueryResultPDO |
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51 | * @throws OIDplusException |
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52 | */ |
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53 | public function doQuery(string $sql, array $prepared_args=null): OIDplusQueryResult { |
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635 | daniel-mar | 54 | $this->last_error = null; |
55 | if (is_null($prepared_args)) { |
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56 | $res = $this->conn->query($sql); |
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57 | |||
58 | if ($res === false) { |
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59 | $this->last_error = $this->conn->errorInfo()[2]; |
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60 | throw new OIDplusSQLException($sql, $this->error()); |
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61 | } else { |
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62 | return new OIDplusQueryResultPDO($res); |
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63 | } |
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64 | } else { |
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65 | foreach ($prepared_args as &$value) { |
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66 | // We need to manually convert booleans into strings, because there is a |
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67 | // 14 year old bug that hasn't been adressed by the PDO developers: |
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68 | // https://bugs.php.net/bug.php?id=57157 |
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69 | if (is_bool($value)) { |
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70 | if ($this->slangDetectionDone) { |
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71 | $value = $this->getSlang()->getSQLBool($value); |
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72 | } else { |
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73 | // This works for everything except Microsoft Access (which needs -1 and 0) |
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74 | // Note: We are using '1' and '0' instead of 'true' and 'false' because MySQL converts boolean to tinyint(1) |
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75 | $value = $value ? '1' : '0'; |
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76 | } |
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77 | } |
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78 | } |
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1316 | daniel-mar | 79 | unset($value); |
635 | daniel-mar | 80 | |
1453 | daniel-mar | 81 | if (isset($this->prepare_cache[$sql])) { |
82 | // Attention: Caching prepared statements in PDO and ODBC is risky, |
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83 | // because it seems that existing pointers are destroyed |
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84 | // when execeute() is called. |
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85 | // However, since we always fetch all data (to allow MARS), |
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86 | // the testcase "Simultanous prepared statements" works, so we should be fine...? |
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87 | $ps = $this->prepare_cache[$sql]; |
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88 | } else { |
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89 | $ps = $this->conn->prepare($sql); |
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90 | if (!$ps) $ps = false; // because null will result in isset()=false |
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91 | $this->prepare_cache[$sql] = $ps; |
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92 | } |
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635 | daniel-mar | 93 | if (!$ps) { |
94 | $this->last_error = $this->conn->errorInfo()[2]; |
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1160 | daniel-mar | 95 | if (!$this->last_error) $this->last_error = _L("Error")." ".$this->conn->errorInfo()[0]; // if no message is available, only show the error-code |
635 | daniel-mar | 96 | throw new OIDplusSQLException($sql, _L('Cannot prepare statement').': '.$this->error()); |
97 | } |
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98 | |||
1160 | daniel-mar | 99 | if (!@$ps->execute($prepared_args)) { |
635 | daniel-mar | 100 | $this->last_error = $ps->errorInfo()[2]; |
1160 | daniel-mar | 101 | if (!$this->last_error) $this->last_error = _L("Error")." ".$ps->errorInfo()[0]; // if no message is available, only show the error-code |
102 | // TODO: |
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103 | // On my test machine with PDO + mysql on XAMPP with PHP 8.2.0, there are two problems with the following code: |
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104 | // $db->query("SELECT * from NONEXISTING", array('')); // note that there is an additional argument, which is wrong! |
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105 | // $db->error() |
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106 | // 1. $ps->errorInfo() is ['HY093', null, null]. |
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107 | // The actual error message "Invalid parameter number: number of bound variables does not match number of tokens" is not shown via errorInfo() |
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108 | // => For now, as workaround, we just show the error message "HY093", if there is no driver specific error text available. |
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109 | // However, this means that the test-case will fail, because the table name cannot be found in the error message?! |
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110 | // 2. The error "Invalid parameter number: number of bound variables does not match number of tokens" is SHOWN as PHP-warning |
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111 | // It seems like PDO::ERRMODE_SILENT is ignored?! The bug is 11 years old: https://bugs.php.net/bug.php?id=63812 |
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112 | // => For now, as workaround, we added "@" in front of $ps->execute ... |
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113 | // |
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114 | // The following code works fine: |
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115 | // $db->query("SELECT * from NONEXISTING", array()); // note that there the number of arguments is now correct |
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116 | // $db->error() |
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117 | // 1. $ps->errorInfo() is ['42S02', '1146', "Table 'oidplus.NONEXISTING' doesn't exist"]. |
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118 | // => That's correct! |
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119 | // 2. $ps->execute() does not show a warning (if "@" is removed) |
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120 | // => That's correct! |
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121 | |||
635 | daniel-mar | 122 | throw new OIDplusSQLException($sql, $this->error()); |
123 | } |
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124 | return new OIDplusQueryResultPDO($ps); |
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125 | } |
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126 | } |
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127 | |||
1116 | daniel-mar | 128 | /** |
129 | * @return int |
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130 | * @throws OIDplusException |
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131 | */ |
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1160 | daniel-mar | 132 | public function doInsertId(): int { |
635 | daniel-mar | 133 | try { |
134 | $out = @($this->conn->lastInsertId()); |
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1167 | daniel-mar | 135 | if ($out === false) return parent::doInsertId(); // fallback method that uses the SQL slang |
635 | daniel-mar | 136 | return $out; |
1050 | daniel-mar | 137 | } catch (\Exception $e) { |
1167 | daniel-mar | 138 | return parent::doInsertId(); // fallback method that uses the SQL slang |
635 | daniel-mar | 139 | } |
140 | } |
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141 | |||
1116 | daniel-mar | 142 | /** |
143 | * @return string |
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144 | */ |
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635 | daniel-mar | 145 | public function error(): string { |
146 | $err = $this->last_error; |
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147 | if ($err == null) $err = ''; |
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1171 | daniel-mar | 148 | return vts_utf8_encode($err); |
635 | daniel-mar | 149 | } |
150 | |||
1116 | daniel-mar | 151 | /** |
152 | * @return void |
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153 | * @throws OIDplusConfigInitializationException |
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154 | * @throws OIDplusException |
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155 | */ |
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635 | daniel-mar | 156 | protected function doConnect()/*: void*/ { |
157 | if (!class_exists('PDO')) throw new OIDplusConfigInitializationException(_L('PHP extension "%1" not installed','PDO')); |
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158 | |||
159 | try { |
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160 | $options = [ |
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1050 | daniel-mar | 161 | \PDO::ATTR_ERRMODE => \PDO::ERRMODE_SILENT, |
162 | \PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC, |
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1241 | daniel-mar | 163 | \PDO::ATTR_EMULATE_PREPARES => true |
635 | daniel-mar | 164 | ]; |
165 | |||
166 | // Try connecting to the database |
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1216 | daniel-mar | 167 | $dsn = OIDplus::baseConfig()->getValue('PDO_DSN', 'mysql:host=localhost;dbname=oidplus;charset=utf8mb4'); |
1231 | daniel-mar | 168 | $username = OIDplus::baseConfig()->getValue('PDO_USERNAME', (str_starts_with($dsn,'odbc:')) ? '' : 'root'); |
635 | daniel-mar | 169 | $password = OIDplus::baseConfig()->getValue('PDO_PASSWORD', ''); |
787 | daniel-mar | 170 | |
1217 | daniel-mar | 171 | if (stripos($dsn,"charset=") === false) { |
1219 | daniel-mar | 172 | // Try to extend DSN with charset |
1370 | daniel-mar | 173 | // Note: For MySQL, must be utf8mb4 or utf8, and not UTF-8 |
1217 | daniel-mar | 174 | try { |
175 | $this->conn = new \PDO("$dsn;charset=utf8mb4", $username, $password, $options); |
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176 | } catch (\Exception $e1) { |
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177 | try { |
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178 | $this->conn = new \PDO("$dsn;charset=utf8", $username, $password, $options); |
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179 | } catch (\Exception $e2) { |
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180 | try { |
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181 | $this->conn = new \PDO("$dsn;charset=UTF-8", $username, $password, $options); |
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182 | } catch (\Exception $e3) { |
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183 | $this->conn = new \PDO($dsn, $username, $password, $options); |
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184 | } |
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185 | } |
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186 | } |
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1218 | daniel-mar | 187 | } else { |
188 | $this->conn = new \PDO($dsn, $username, $password, $options); |
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1217 | daniel-mar | 189 | } |
1050 | daniel-mar | 190 | } catch (\PDOException $e) { |
635 | daniel-mar | 191 | $message = $e->getMessage(); |
1171 | daniel-mar | 192 | $message = vts_utf8_encode($message); // Make UTF-8 if it is NOT already UTF-8. Important for German Microsoft Access. |
863 | daniel-mar | 193 | throw new OIDplusConfigInitializationException(trim(_L('Connection to the database failed!').' '.$message)); |
635 | daniel-mar | 194 | } |
195 | |||
196 | $this->last_error = null; |
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197 | |||
198 | try { |
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1216 | daniel-mar | 199 | @$this->conn->exec("SET NAMES 'utf-8'"); |
1050 | daniel-mar | 200 | } catch (\Exception $e) { |
635 | daniel-mar | 201 | } |
202 | |||
1216 | daniel-mar | 203 | try { |
204 | @$this->conn->exec("SET CHARACTER SET 'utf-8'"); |
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205 | } catch (\Exception $e) { |
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206 | } |
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207 | |||
208 | try { |
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209 | @$this->conn->exec("SET NAMES 'utf8mb4'"); |
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210 | } catch (\Exception $e) { |
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211 | } |
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212 | |||
1241 | daniel-mar | 213 | $this->detectTransactionSupport(); |
214 | } |
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215 | |||
216 | /** |
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217 | * @return void |
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218 | */ |
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219 | private function detectTransactionSupport() { |
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635 | daniel-mar | 220 | try { |
1241 | daniel-mar | 221 | // Attention: Check it after you have already sent a query, because Microsoft Access doesn't seem to allow |
222 | // changing auto commit once a query was executed ("Attribute cannot be set now SQLState: S1011") |
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223 | // Note: For some weird reason we *DO* need to redirect the output to "$dummy", otherwise it won't work! |
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224 | $sql = "select name from ###config where 1=0"; |
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225 | $sql = str_replace('###', OIDplus::baseConfig()->getValue('TABLENAME_PREFIX', ''), $sql); |
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226 | $dummy = $this->conn->query($sql); |
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1050 | daniel-mar | 227 | } catch (\Exception $e) { |
1241 | daniel-mar | 228 | // Microsoft Access might output that "xyz_config" is not found, if TABLENAME_PREFIX is wrong |
229 | // We didn't had the change to verify the existance of ###config using afterConnectMandatory() at this stage. |
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230 | // This try-catch is usually not required because our error mode is set to silent. |
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231 | } |
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232 | |||
233 | // Note for Firebird: If Firebird uses auto-transactions via PDO, it doesn't allow an explicit transaction after a query has been |
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234 | // executed once in auto-commit mode. For some reason, the query was auto-committed, but after the auto-comit, a new transaction is |
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235 | // automatically opened, so new explicit transaction are denied with the error messag ethat a transaction is still open. A bug?! |
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236 | // If we explicit commit the implicitly opened transaction, we can use explicit transactions, but once |
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237 | // we want to run a normal query, Firebird denies it, saying that no transaction is open (because it asserts that an implicit |
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238 | // opened transaction is available). |
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239 | // The only solution would be to disable auto-commit and do everything ourselves, but this is a complex and risky task, |
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240 | // so we just let Firebird run in Transaction-Disabled-Mode. |
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241 | |||
242 | try { |
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243 | if (!$this->conn->beginTransaction()) { |
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244 | $this->transactions_supported = false; |
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245 | } else { |
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246 | $this->conn->rollBack(); |
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247 | $this->transactions_supported = true; |
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248 | } |
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249 | } catch (\Exception $e) { |
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635 | daniel-mar | 250 | $this->transactions_supported = false; |
251 | } |
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252 | } |
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253 | |||
1116 | daniel-mar | 254 | /** |
255 | * @return void |
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256 | */ |
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635 | daniel-mar | 257 | protected function doDisconnect()/*: void*/ { |
1241 | daniel-mar | 258 | /* |
259 | if (!$this->conn->getAttribute(\PDO::ATTR_AUTOCOMMIT)) { |
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260 | try { |
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261 | $this->conn->commit(); |
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262 | } catch (\Exception $e) { |
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263 | } |
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264 | } |
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265 | */ |
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635 | daniel-mar | 266 | $this->conn = null; // the connection will be closed by removing the reference |
267 | } |
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268 | |||
1116 | daniel-mar | 269 | /** |
270 | * @var bool |
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271 | */ |
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635 | daniel-mar | 272 | private $intransaction = false; |
273 | |||
1116 | daniel-mar | 274 | /** |
275 | * @return bool |
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276 | */ |
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635 | daniel-mar | 277 | public function transaction_supported(): bool { |
278 | return $this->transactions_supported; |
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279 | } |
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280 | |||
1116 | daniel-mar | 281 | /** |
282 | * @return int |
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283 | */ |
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635 | daniel-mar | 284 | public function transaction_level(): int { |
285 | if (!$this->transaction_supported()) { |
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286 | // TODO? |
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287 | return 0; |
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288 | } |
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289 | return $this->intransaction ? 1 : 0; |
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290 | } |
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291 | |||
1116 | daniel-mar | 292 | /** |
293 | * @return void |
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294 | * @throws OIDplusException |
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295 | */ |
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635 | daniel-mar | 296 | public function transaction_begin()/*: void*/ { |
297 | if (!$this->transaction_supported()) { |
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298 | // TODO? |
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299 | return; |
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300 | } |
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301 | if ($this->intransaction) throw new OIDplusException(_L('Nested transactions are not supported by this database plugin.')); |
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302 | $this->conn->beginTransaction(); |
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303 | $this->intransaction = true; |
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304 | } |
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305 | |||
1116 | daniel-mar | 306 | /** |
307 | * @return void |
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308 | */ |
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635 | daniel-mar | 309 | public function transaction_commit()/*: void*/ { |
310 | if (!$this->transaction_supported()) { |
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311 | // TODO? |
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312 | return; |
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313 | } |
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314 | $this->conn->commit(); |
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315 | $this->intransaction = false; |
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316 | } |
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317 | |||
1116 | daniel-mar | 318 | /** |
319 | * @return void |
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320 | */ |
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635 | daniel-mar | 321 | public function transaction_rollback()/*: void*/ { |
322 | if (!$this->transaction_supported()) { |
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323 | // TODO? |
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324 | return; |
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325 | } |
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326 | $this->conn->rollBack(); |
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327 | $this->intransaction = false; |
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328 | } |
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329 | |||
1220 | daniel-mar | 330 | /** |
331 | * @return array |
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332 | */ |
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333 | public function getExtendedInfo(): array { |
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334 | $dsn = OIDplus::baseConfig()->getValue('PDO_DSN', 'mysql:host=localhost;dbname=oidplus;charset=utf8mb4'); |
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1231 | daniel-mar | 335 | $dsn = preg_replace('@(Password|PWD)=(.+);@ismU', '('._L('redacted').');', $dsn); |
1220 | daniel-mar | 336 | return array( |
337 | _L('DSN') => $dsn |
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338 | ); |
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339 | } |
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340 | |||
635 | daniel-mar | 341 | } |