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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\Serializer\Normalizer;
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13
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14 use Symfony\Component\HttpFoundation\File\File;
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15 use Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser;
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16 use Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesserInterface;
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17 use Symfony\Component\Serializer\Exception\InvalidArgumentException;
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18 use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
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19
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20 /**
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21 * Normalizes an {@see \SplFileInfo} object to a data URI.
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22 * Denormalizes a data URI to a {@see \SplFileObject} object.
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23 *
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24 * @author Kévin Dunglas <dunglas@gmail.com>
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25 */
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26 class DataUriNormalizer implements NormalizerInterface, DenormalizerInterface
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27 {
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28 private static $supportedTypes = [
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29 \SplFileInfo::class => true,
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30 \SplFileObject::class => true,
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31 File::class => true,
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32 ];
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33
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34 /**
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35 * @var MimeTypeGuesserInterface
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36 */
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37 private $mimeTypeGuesser;
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38
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39 public function __construct(MimeTypeGuesserInterface $mimeTypeGuesser = null)
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40 {
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41 if (null === $mimeTypeGuesser && class_exists('Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser')) {
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42 $mimeTypeGuesser = MimeTypeGuesser::getInstance();
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43 }
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44
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45 $this->mimeTypeGuesser = $mimeTypeGuesser;
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46 }
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47
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48 /**
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49 * {@inheritdoc}
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50 */
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51 public function normalize($object, $format = null, array $context = [])
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52 {
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53 if (!$object instanceof \SplFileInfo) {
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54 throw new InvalidArgumentException('The object must be an instance of "\SplFileInfo".');
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55 }
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56
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57 $mimeType = $this->getMimeType($object);
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58 $splFileObject = $this->extractSplFileObject($object);
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59
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60 $data = '';
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61
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62 $splFileObject->rewind();
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63 while (!$splFileObject->eof()) {
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64 $data .= $splFileObject->fgets();
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65 }
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66
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67 if ('text' === explode('/', $mimeType, 2)[0]) {
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68 return sprintf('data:%s,%s', $mimeType, rawurlencode($data));
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69 }
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70
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71 return sprintf('data:%s;base64,%s', $mimeType, base64_encode($data));
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72 }
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73
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74 /**
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75 * {@inheritdoc}
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76 */
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77 public function supportsNormalization($data, $format = null)
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78 {
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79 return $data instanceof \SplFileInfo;
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80 }
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81
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82 /**
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83 * {@inheritdoc}
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84 *
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85 * Regex adapted from Brian Grinstead code.
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86 *
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87 * @see https://gist.github.com/bgrins/6194623
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88 *
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89 * @throws InvalidArgumentException
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90 * @throws NotNormalizableValueException
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91 */
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92 public function denormalize($data, $class, $format = null, array $context = [])
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93 {
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94 if (!preg_match('/^data:([a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}\/[a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}(;[a-z0-9\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\\\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i', $data)) {
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95 throw new NotNormalizableValueException('The provided "data:" URI is not valid.');
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96 }
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97
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98 try {
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99 switch ($class) {
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100 case 'Symfony\Component\HttpFoundation\File\File':
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101 return new File($data, false);
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102
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103 case 'SplFileObject':
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104 case 'SplFileInfo':
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105 return new \SplFileObject($data);
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106 }
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107 } catch (\RuntimeException $exception) {
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108 throw new NotNormalizableValueException($exception->getMessage(), $exception->getCode(), $exception);
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109 }
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110
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111 throw new InvalidArgumentException(sprintf('The class parameter "%s" is not supported. It must be one of "SplFileInfo", "SplFileObject" or "Symfony\Component\HttpFoundation\File\File".', $class));
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112 }
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113
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114 /**
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115 * {@inheritdoc}
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116 */
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117 public function supportsDenormalization($data, $type, $format = null)
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118 {
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119 return isset(self::$supportedTypes[$type]);
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120 }
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121
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122 /**
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123 * Gets the mime type of the object. Defaults to application/octet-stream.
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124 *
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125 * @param \SplFileInfo $object
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126 *
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127 * @return string
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128 */
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129 private function getMimeType(\SplFileInfo $object)
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130 {
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131 if ($object instanceof File) {
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132 return $object->getMimeType();
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133 }
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134
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135 if ($this->mimeTypeGuesser && $mimeType = $this->mimeTypeGuesser->guess($object->getPathname())) {
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136 return $mimeType;
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137 }
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138
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139 return 'application/octet-stream';
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140 }
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141
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142 /**
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143 * Returns the \SplFileObject instance associated with the given \SplFileInfo instance.
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144 *
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145 * @param \SplFileInfo $object
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146 *
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147 * @return \SplFileObject
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148 */
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149 private function extractSplFileObject(\SplFileInfo $object)
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150 {
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151 if ($object instanceof \SplFileObject) {
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152 return $object;
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153 }
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154
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155 return $object->openFile();
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156 }
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157 }
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