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class-json-deflate-array-codec.php
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class-json-deflate-array-codec.php
101 lines
| 1 | <?php |
| 2 | /** |
| 3 | * An implementation of Automattic\Jetpack\Sync\Codec_Interface that uses gzip's DEFLATE |
| 4 | * algorithm to compress objects serialized using json_encode. |
| 5 | * |
| 6 | * @package automattic/jetpack-sync |
| 7 | */ |
| 8 | |
| 9 | namespace Automattic\Jetpack\Sync; |
| 10 | |
| 11 | if ( ! defined( 'ABSPATH' ) ) { |
| 12 | exit( 0 ); |
| 13 | } |
| 14 | |
| 15 | /** |
| 16 | * An implementation of Automattic\Jetpack\Sync\Codec_Interface that uses gzip's DEFLATE |
| 17 | * algorithm to compress objects serialized using json_encode |
| 18 | */ |
| 19 | class JSON_Deflate_Array_Codec implements Codec_Interface { |
| 20 | const CODEC_NAME = 'deflate-json-array'; |
| 21 | |
| 22 | /** |
| 23 | * Return the name of the codec. |
| 24 | * |
| 25 | * @return string |
| 26 | */ |
| 27 | public function name() { |
| 28 | return self::CODEC_NAME; |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Encodes an object. |
| 33 | * |
| 34 | * @param object $object Item to encode. |
| 35 | * @return string |
| 36 | */ |
| 37 | public function encode( $object ) { |
| 38 | return base64_encode( gzdeflate( $this->json_serialize( $object ) ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Decode compressed serialized value. |
| 43 | * |
| 44 | * @param string $input Item to decode. |
| 45 | * @return array|mixed|object |
| 46 | */ |
| 47 | public function decode( $input ) { |
| 48 | $decoded = base64_decode( $input ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode |
| 49 | $inflated = @gzinflate( $decoded ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged |
| 50 | |
| 51 | return is_string( $inflated ) ? $this->json_unserialize( $inflated ) : null; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Serialize JSON |
| 56 | * |
| 57 | * @see https://gist.github.com/muhqu/820694 |
| 58 | * |
| 59 | * @param mixed $any Value to serialize and wrap. |
| 60 | * |
| 61 | * @return false|string |
| 62 | */ |
| 63 | protected function json_serialize( $any ) { |
| 64 | return wp_json_encode( Functions::json_wrap( $any ), JSON_UNESCAPED_SLASHES ); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Unserialize JSON |
| 69 | * |
| 70 | * @param string $str JSON string. |
| 71 | * @return array|object Unwrapped JSON. |
| 72 | */ |
| 73 | protected function json_unserialize( $str ) { |
| 74 | return $this->json_unwrap( json_decode( $str, true ) ); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Unwraps a json_decode return. |
| 79 | * |
| 80 | * @param array|object $any json_decode object. |
| 81 | * @return array|object |
| 82 | */ |
| 83 | private function json_unwrap( $any ) { |
| 84 | if ( is_array( $any ) ) { |
| 85 | foreach ( $any as $k => $v ) { |
| 86 | if ( '__o' === $k ) { |
| 87 | continue; |
| 88 | } |
| 89 | $any[ $k ] = $this->json_unwrap( $v ); |
| 90 | } |
| 91 | |
| 92 | if ( isset( $any['__o'] ) ) { |
| 93 | unset( $any['__o'] ); |
| 94 | $any = (object) $any; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | return $any; |
| 99 | } |
| 100 | } |
| 101 |