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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\DependencyInjection;
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13
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14 use Symfony\Component\Config\Util\XmlUtils;
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15 use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
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16 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
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17
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18 /**
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19 * @author Nicolas Grekas <p@tchwork.com>
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20 */
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21 class EnvVarProcessor implements EnvVarProcessorInterface
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22 {
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23 private $container;
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24
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25 public function __construct(ContainerInterface $container)
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26 {
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27 $this->container = $container;
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28 }
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29
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30 /**
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31 * {@inheritdoc}
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32 */
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33 public static function getProvidedTypes()
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34 {
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35 return [
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36 'base64' => 'string',
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37 'bool' => 'bool',
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38 'const' => 'bool|int|float|string|array',
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39 'file' => 'string',
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40 'float' => 'float',
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41 'int' => 'int',
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42 'json' => 'array',
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43 'resolve' => 'string',
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44 'string' => 'string',
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45 ];
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46 }
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47
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48 /**
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49 * {@inheritdoc}
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50 */
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51 public function getEnv($prefix, $name, \Closure $getEnv)
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52 {
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53 $i = strpos($name, ':');
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54
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55 if ('file' === $prefix) {
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56 if (!is_scalar($file = $getEnv($name))) {
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57 throw new RuntimeException(sprintf('Invalid file name: env var "%s" is non-scalar.', $name));
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58 }
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59 if (!file_exists($file)) {
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60 throw new RuntimeException(sprintf('Env "file:%s" not found: %s does not exist.', $name, $file));
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61 }
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62
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63 return file_get_contents($file);
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64 }
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65
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66 if (false !== $i || 'string' !== $prefix) {
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67 if (null === $env = $getEnv($name)) {
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68 return;
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69 }
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70 } elseif (isset($_ENV[$name])) {
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71 $env = $_ENV[$name];
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72 } elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
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73 $env = $_SERVER[$name];
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74 } elseif (false === ($env = getenv($name)) || null === $env) { // null is a possible value because of thread safety issues
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75 if (!$this->container->hasParameter("env($name)")) {
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76 throw new EnvNotFoundException($name);
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77 }
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78
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79 if (null === $env = $this->container->getParameter("env($name)")) {
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80 return;
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81 }
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82 }
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83
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84 if (!is_scalar($env)) {
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85 throw new RuntimeException(sprintf('Non-scalar env var "%s" cannot be cast to %s.', $name, $prefix));
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86 }
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87
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88 if ('string' === $prefix) {
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89 return (string) $env;
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90 }
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91
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92 if ('bool' === $prefix) {
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93 return (bool) self::phpize($env);
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94 }
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95
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96 if ('int' === $prefix) {
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97 if (!is_numeric($env = self::phpize($env))) {
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98 throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to int.', $name));
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99 }
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100
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101 return (int) $env;
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102 }
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103
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104 if ('float' === $prefix) {
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105 if (!is_numeric($env = self::phpize($env))) {
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106 throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to float.', $name));
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107 }
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108
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109 return (float) $env;
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110 }
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111
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112 if ('const' === $prefix) {
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113 if (!\defined($env)) {
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114 throw new RuntimeException(sprintf('Env var "%s" maps to undefined constant "%s".', $name, $env));
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115 }
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116
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117 return \constant($env);
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118 }
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119
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120 if ('base64' === $prefix) {
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121 return base64_decode($env);
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122 }
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123
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124 if ('json' === $prefix) {
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125 $env = json_decode($env, true);
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126
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127 if (JSON_ERROR_NONE !== json_last_error()) {
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128 throw new RuntimeException(sprintf('Invalid JSON in env var "%s": '.json_last_error_msg(), $name));
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129 }
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130
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131 if (!\is_array($env)) {
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132 throw new RuntimeException(sprintf('Invalid JSON env var "%s": array expected, %s given.', $name, \gettype($env)));
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133 }
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134
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135 return $env;
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136 }
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137
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138 if ('resolve' === $prefix) {
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139 return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($name) {
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140 if (!isset($match[1])) {
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141 return '%';
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142 }
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143 $value = $this->container->getParameter($match[1]);
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144 if (!is_scalar($value)) {
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145 throw new RuntimeException(sprintf('Parameter "%s" found when resolving env var "%s" must be scalar, "%s" given.', $match[1], $name, \gettype($value)));
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146 }
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147
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148 return $value;
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149 }, $env);
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150 }
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151
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152 throw new RuntimeException(sprintf('Unsupported env var prefix "%s".', $prefix));
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153 }
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154
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155 private static function phpize($value)
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156 {
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157 if (!class_exists(XmlUtils::class)) {
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158 throw new RuntimeException('The Symfony Config component is required to cast env vars to "bool", "int" or "float".');
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159 }
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160
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161 return XmlUtils::phpize($value);
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162 }
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163 }
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