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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 OIDplusDatabaseConnectionODBC extends OIDplusDatabaseConnection { |
1130 | daniel-mar | 27 | /** |
28 | * @var mixed|null |
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29 | */ |
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30 | private $conn = null; |
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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; // do the same like MySQL+PDO, just to be equal in the behavior |
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 | /** |
43 | * @return bool|null |
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44 | * @throws OIDplusException |
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45 | */ |
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635 | daniel-mar | 46 | protected function forcePrepareEmulation() { |
47 | $mode = OIDplus::baseConfig()->getValue('PREPARED_STATEMENTS_EMULATION', 'auto'); |
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48 | if ($mode === 'on') return true; |
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49 | if ($mode === 'off') return false; |
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50 | |||
51 | static $res = null; |
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52 | if (is_null($res)) { |
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53 | $sql = 'select name from ###config where name = ?'; |
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54 | $sql = str_replace('###', OIDplus::baseConfig()->getValue('TABLENAME_PREFIX', ''), $sql); |
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55 | $res = @odbc_prepare($this->conn, $sql) === false; |
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56 | } |
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57 | |||
58 | return $res; |
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59 | } |
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60 | |||
1116 | daniel-mar | 61 | /** |
62 | * @param string $sql |
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63 | * @param array|null $prepared_args |
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64 | * @return OIDplusQueryResultODBC |
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65 | * @throws OIDplusConfigInitializationException |
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66 | * @throws OIDplusException |
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67 | * @throws OIDplusSQLException |
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68 | */ |
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69 | protected function doQueryInternalPrepare(string $sql, array $prepared_args=null): OIDplusQueryResultODBC { |
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1219 | daniel-mar | 70 | foreach ($prepared_args as &$value) { |
71 | // ODBC/SQLServer has problems converting "true" to the data type "bit" |
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72 | // Error "Invalid character value for cast specification" |
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73 | if (is_bool($value)) { |
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74 | if ($this->slangDetectionDone) { |
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75 | $value = $this->getSlang()->getSQLBool($value); |
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76 | } else { |
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77 | $value = $value ? '1' : '0'; |
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949 | daniel-mar | 78 | } |
1219 | daniel-mar | 79 | } |
80 | } |
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1316 | daniel-mar | 81 | unset($value); |
635 | daniel-mar | 82 | |
1219 | daniel-mar | 83 | $ps = @odbc_prepare($this->conn, $sql); |
84 | if (!$ps) { |
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85 | // If preparation fails, try the emulation |
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86 | // For example, SQL Server ODBC Driver cannot have "?" in a subquery, |
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87 | // otherwise you receive the error message |
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88 | // "Syntax error or access violation" on odbc_prepare() |
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89 | return $this->doQueryPrepareEmulation($sql, $prepared_args); |
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90 | /* |
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91 | $this->last_error = odbc_errormsg($this->conn); |
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92 | throw new OIDplusSQLException($sql, _L('Cannot prepare statement').': '.$this->error()); |
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93 | */ |
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94 | } |
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635 | daniel-mar | 95 | |
1219 | daniel-mar | 96 | if (!@odbc_execute($ps, $prepared_args)) { |
97 | $this->last_error = odbc_errormsg($this->conn); |
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98 | throw new OIDplusSQLException($sql, $this->error()); |
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99 | } |
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100 | return new OIDplusQueryResultODBC($ps); |
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949 | daniel-mar | 101 | } |
102 | |||
1116 | daniel-mar | 103 | /** |
104 | * @param string $sql |
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105 | * @param array|null $prepared_args |
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106 | * @return OIDplusQueryResultODBC |
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107 | * @throws OIDplusConfigInitializationException |
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108 | * @throws OIDplusException |
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109 | * @throws OIDplusSQLException |
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110 | */ |
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111 | protected function doQueryPrepareEmulation(string $sql, array $prepared_args=null): OIDplusQueryResultODBC { |
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1219 | daniel-mar | 112 | // For some drivers (e.g. Microsoft Access), we need to do this kind of emulation, because odbc_prepare() does not work |
1389 | daniel-mar | 113 | $dummy = find_nonexisting_substr($sql); |
114 | $sql = str_replace('?', $dummy, $sql); |
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1219 | daniel-mar | 115 | foreach ($prepared_args as $arg) { |
1389 | daniel-mar | 116 | $needle = $dummy; |
1219 | daniel-mar | 117 | if (is_bool($arg)) { |
118 | if ($this->slangDetectionDone) { |
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119 | $replace = $this->getSlang()->getSQLBool($arg); |
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120 | } else { |
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121 | $replace = $arg ? '1' : '0'; |
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635 | daniel-mar | 122 | } |
1219 | daniel-mar | 123 | } else if (is_int($arg)) { |
124 | $replace = $arg; |
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125 | } else if (is_float($arg)) { |
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126 | $replace = number_format($arg, 10, '.', ''); |
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1350 | daniel-mar | 127 | } else if (is_null($arg)) { |
128 | $replace = 'NULL'; |
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1219 | daniel-mar | 129 | } else { |
130 | // TODO: More types? |
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1370 | daniel-mar | 131 | // Note: Actually, the strings should be N'...' instead of '...', |
132 | // but since Unicode does not work with ODBC, it does not make a difference |
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1219 | daniel-mar | 133 | if ($this->slangDetectionDone) { |
1350 | daniel-mar | 134 | $replace = "'".$this->getSlang()->escapeString($arg)."'"; |
1219 | daniel-mar | 135 | } else { |
136 | $replace = "'".str_replace("'", "''", $arg)."'"; |
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635 | daniel-mar | 137 | } |
1219 | daniel-mar | 138 | } |
139 | $pos = strpos($sql, $needle); |
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140 | if ($pos !== false) { |
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141 | $sql = substr_replace($sql, $replace, $pos, strlen($needle)); |
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142 | } |
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143 | } |
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1389 | daniel-mar | 144 | $sql = str_replace($dummy, '?', $sql); |
1219 | daniel-mar | 145 | $ps = @odbc_exec($this->conn, $sql); |
146 | if (!$ps) { |
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147 | $this->last_error = odbc_errormsg($this->conn); |
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148 | throw new OIDplusSQLException($sql, _L('Cannot prepare statement').': '.$this->error()); |
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149 | } |
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150 | return new OIDplusQueryResultODBC($ps); |
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949 | daniel-mar | 151 | } |
635 | daniel-mar | 152 | |
1116 | daniel-mar | 153 | /** |
154 | * @param string $sql |
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155 | * @param array|null $prepared_args |
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156 | * @return OIDplusQueryResultODBC |
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157 | * @throws OIDplusException |
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158 | */ |
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159 | public function doQuery(string $sql, array $prepared_args=null): OIDplusQueryResult { |
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949 | daniel-mar | 160 | $this->last_error = null; |
161 | if (is_null($prepared_args)) { |
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162 | $res = @odbc_exec($this->conn, $sql); |
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635 | daniel-mar | 163 | |
949 | daniel-mar | 164 | if ($res === false) { |
165 | $this->last_error = odbc_errormsg($this->conn); |
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166 | throw new OIDplusSQLException($sql, $this->error()); |
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167 | } else { |
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168 | return new OIDplusQueryResultODBC($res); |
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635 | daniel-mar | 169 | } |
949 | daniel-mar | 170 | } else { |
171 | if ($this->forcePrepareEmulation()) { |
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172 | return $this->doQueryPrepareEmulation($sql, $prepared_args); |
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173 | } else { |
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174 | return $this->doQueryInternalPrepare($sql, $prepared_args); |
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175 | } |
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635 | daniel-mar | 176 | } |
177 | } |
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178 | |||
1116 | daniel-mar | 179 | /** |
180 | * @return string |
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181 | */ |
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635 | daniel-mar | 182 | public function error(): string { |
183 | $err = $this->last_error; |
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184 | if ($err == null) $err = ''; |
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1116 | daniel-mar | 185 | return vts_utf8_encode($err); // UTF-8 encode, because ODBC might output weird stuff ... |
635 | daniel-mar | 186 | } |
187 | |||
1116 | daniel-mar | 188 | /** |
189 | * @return void |
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190 | * @throws OIDplusConfigInitializationException |
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191 | * @throws OIDplusException |
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192 | */ |
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635 | daniel-mar | 193 | protected function doConnect()/*: void*/ { |
194 | if (!function_exists('odbc_connect')) throw new OIDplusConfigInitializationException(_L('PHP extension "%1" not installed','ODBC')); |
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195 | |||
196 | // Try connecting to the database |
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1370 | daniel-mar | 197 | $dsn = OIDplus::baseConfig()->getValue('ODBC_DSN', 'DRIVER={SQL Server};SERVER=localhost;DATABASE=oidplus'); |
635 | daniel-mar | 198 | $username = OIDplus::baseConfig()->getValue('ODBC_USERNAME', ''); |
199 | $password = OIDplus::baseConfig()->getValue('ODBC_PASSWORD', ''); |
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1216 | daniel-mar | 200 | |
1217 | daniel-mar | 201 | // Try to extend DSN with charset |
1370 | daniel-mar | 202 | // Note: For MySQL, must be utf8mb4 or utf8, and not UTF-8 |
1217 | daniel-mar | 203 | if (stripos($dsn,"charset=") === false) { |
1218 | daniel-mar | 204 | $this->conn = odbc_connect("$dsn;charset=utf8mb4", $username, $password); |
205 | if (!$this->conn) $this->conn = odbc_connect("$dsn;charset=utf8", $username, $password); |
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206 | if (!$this->conn) $this->conn = odbc_connect("$dsn;charset=UTF-8", $username, $password); |
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207 | if (!$this->conn) $this->conn = odbc_connect($dsn, $username, $password); |
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208 | } else { |
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209 | $this->conn = odbc_connect($dsn, $username, $password); |
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1217 | daniel-mar | 210 | } |
1216 | daniel-mar | 211 | |
635 | daniel-mar | 212 | if (!$this->conn) { |
213 | $message = odbc_errormsg(); |
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1171 | daniel-mar | 214 | $message = vts_utf8_encode($message); // Make UTF-8 if it is NOT already UTF-8. Important for German Microsoft Access. |
863 | daniel-mar | 215 | throw new OIDplusConfigInitializationException(trim(_L('Connection to the database failed!').' '.$message)); |
635 | daniel-mar | 216 | } |
217 | |||
218 | $this->last_error = null; |
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219 | |||
220 | try { |
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1216 | daniel-mar | 221 | @odbc_exec($this->conn, "SET NAMES 'UTF-8'"); // Does most likely NOT work with ODBC. Try adding ";CHARSET=UTF8" (or similar) to the DSN |
1050 | daniel-mar | 222 | } catch (\Exception $e) { |
635 | daniel-mar | 223 | } |
224 | |||
1216 | daniel-mar | 225 | try { |
226 | @odbc_exec($this->conn, "SET CHARACTER SET 'UTF-8'"); // Does most likely NOT work with ODBC. Try adding ";CHARSET=UTF8" (or similar) to the DSN |
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227 | } catch (\Exception $e) { |
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228 | } |
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229 | |||
230 | try { |
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231 | @odbc_exec($this->conn, "SET NAMES 'utf8mb4'"); // Does most likely NOT work with ODBC. Try adding ";CHARSET=UTF8" (or similar) to the DSN |
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232 | } catch (\Exception $e) { |
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233 | } |
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234 | |||
635 | daniel-mar | 235 | // We check if the DBMS supports autocommit. |
236 | // Attention: Check it after you have sent a query already, because Microsoft Access doesn't seem to allow |
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237 | // changing auto commit once a query was executed ("Attribute cannot be set now SQLState: S1011") |
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238 | // Note: For some weird reason we *DO* need to redirect the output to "$dummy", otherwise it won't work! |
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239 | $sql = "select name from ###config where 1=0"; |
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240 | $sql = str_replace('###', OIDplus::baseConfig()->getValue('TABLENAME_PREFIX', ''), $sql); |
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241 | $dummy = @odbc_exec($this->conn, $sql); |
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242 | $this->transactions_supported = @odbc_autocommit($this->conn, false); |
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243 | @odbc_autocommit($this->conn, true); |
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244 | } |
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245 | |||
1116 | daniel-mar | 246 | /** |
247 | * @return void |
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248 | */ |
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635 | daniel-mar | 249 | protected function doDisconnect()/*: void*/ { |
250 | if (!is_null($this->conn)) { |
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251 | @odbc_close($this->conn); |
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252 | $this->conn = null; |
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253 | } |
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254 | } |
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255 | |||
1116 | daniel-mar | 256 | /** |
257 | * @var bool |
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258 | */ |
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635 | daniel-mar | 259 | private $intransaction = false; |
260 | |||
1116 | daniel-mar | 261 | /** |
262 | * @return bool |
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263 | */ |
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635 | daniel-mar | 264 | public function transaction_supported(): bool { |
265 | return $this->transactions_supported; |
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266 | } |
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267 | |||
1116 | daniel-mar | 268 | /** |
269 | * @return int |
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270 | */ |
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635 | daniel-mar | 271 | public function transaction_level(): int { |
272 | if (!$this->transaction_supported()) { |
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273 | // TODO? |
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274 | return 0; |
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275 | } |
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276 | return $this->intransaction ? 1 : 0; |
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277 | } |
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278 | |||
1116 | daniel-mar | 279 | /** |
280 | * @return void |
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281 | * @throws OIDplusException |
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282 | */ |
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635 | daniel-mar | 283 | public function transaction_begin()/*: void*/ { |
284 | if (!$this->transaction_supported()) { |
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285 | // TODO? |
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286 | return; |
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287 | } |
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288 | if ($this->intransaction) throw new OIDplusException(_L('Nested transactions are not supported by this database plugin.')); |
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289 | odbc_autocommit($this->conn, false); // begin transaction |
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290 | $this->intransaction = true; |
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291 | } |
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292 | |||
1116 | daniel-mar | 293 | /** |
294 | * @return void |
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295 | */ |
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635 | daniel-mar | 296 | public function transaction_commit()/*: void*/ { |
297 | if (!$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 | odbc_commit($this->conn); |
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302 | odbc_autocommit($this->conn, true); |
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303 | $this->intransaction = false; |
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304 | } |
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305 | |||
1116 | daniel-mar | 306 | /** |
307 | * @return void |
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308 | */ |
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635 | daniel-mar | 309 | public function transaction_rollback()/*: void*/ { |
310 | if (!$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 | odbc_rollback($this->conn); |
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315 | odbc_autocommit($this->conn, true); |
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316 | $this->intransaction = false; |
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317 | } |
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1220 | daniel-mar | 318 | |
319 | /** |
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320 | * @return array |
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321 | */ |
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322 | public function getExtendedInfo(): array { |
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323 | $dsn = OIDplus::baseConfig()->getValue('ODBC_DSN', 'DRIVER={SQL Server};SERVER=localhost;DATABASE=oidplus;CHARSET=UTF8'); |
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1231 | daniel-mar | 324 | $dsn = preg_replace('@(Password|PWD)=(.+);@ismU', '('._L('redacted').');', $dsn); |
1220 | daniel-mar | 325 | return array( |
326 | _L('DSN') => $dsn |
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327 | ); |
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328 | } |
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329 | |||
635 | daniel-mar | 330 | } |