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68 lines
2.0 KiB
68 lines
2.0 KiB
<?php
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/*
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* This file is part of php-cache organization.
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*
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* (c) 2015 Aaron Scherer <aequasi@gmail.com>, Tobias Nyholm <tobias.nyholm@gmail.com>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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namespace Cache\Adapter\Common;
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/**
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* This trait provides common routines for safely encoding binary and non-UTF8 data in
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* JSON. This is needed for components that use JSON natively (currently, the MongoDB
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* adapter and EncryptedCachePool).
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*
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* @author Stephen Clouse <stephen.clouse@noaa.gov>
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*/
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trait JsonBinaryArmoring
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{
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private static $ESCAPE_JSON_CHARACTERS = [
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"\x00", "\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07",
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"\x08", "\x09", "\x0A", "\x0B", "\x0C", "\x0D", "\x0E", "\x0F",
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"\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17",
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"\x18", "\x19", "\x1A", "\x1B", "\x1C", "\x1D", "\x1E", "\x1F",
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];
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private static $ENCODED_JSON_CHARACTERS = [
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'\u0000', '\u0001', '\u0002', '\u0003', '\u0004', '\u0005', '\u0006', '\u0007',
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'\u0008', '\u0009', '\u000A', '\u000B', '\u000C', '\u000D', '\u000E', '\u000F',
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'\u0010', '\u0011', '\u0012', '\u0013', '\u0014', '\u0015', '\u0016', '\u0017',
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'\u0018', '\u0019', '\u001A', '\u001B', '\u001C', '\u001D', '\u001E', '\u001F',
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];
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/**
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* Armor a value going into a JSON document.
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*
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* @param string $value
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*
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* @return string
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*/
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protected static function jsonArmor($value)
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{
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return str_replace(
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static::$ESCAPE_JSON_CHARACTERS,
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static::$ENCODED_JSON_CHARACTERS,
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utf8_encode($value)
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);
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}
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/**
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* De-armor a value from a JSON document.
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*
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* @param string $value
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*
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* @return string
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*/
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protected static function jsonDeArmor($value)
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{
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return utf8_decode(str_replace(
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static::$ENCODED_JSON_CHARACTERS,
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static::$ESCAPE_JSON_CHARACTERS,
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$value
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));
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}
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}
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