70 lines
2.0 KiB
PHP
70 lines
2.0 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\API\Baggage\Propagation;
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use function explode;
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use OpenTelemetry\API\Baggage\BaggageBuilderInterface;
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use OpenTelemetry\API\Baggage\Metadata;
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use function str_replace;
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use function trim;
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use function urldecode;
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final class Parser
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{
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private const EXCLUDED_KEY_CHARS = [' ', '(', ')', '<', '>', '@', ',', ';', ':', '\\', '"', '/', '[', ']', '?', '=', '{', '}'];
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private const EXCLUDED_VALUE_CHARS = [' ', '"', ',', ';', '\\'];
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private const EQUALS = '=';
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/** @readonly */
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private string $baggageHeader;
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public function __construct(string $baggageHeader)
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{
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$this->baggageHeader = $baggageHeader;
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}
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public function parseInto(BaggageBuilderInterface $baggageBuilder): void
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{
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foreach (explode(',', $this->baggageHeader) as $baggageString) {
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if (empty(trim($baggageString))) {
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continue;
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}
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$explodedString = explode(';', $baggageString, 2);
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$keyValue = trim($explodedString[0]);
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if (empty($keyValue) || mb_strpos($keyValue, self::EQUALS) === false) {
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continue;
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}
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$metadataString = $explodedString[1] ?? null;
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if ($metadataString && !empty(trim(($metadataString)))) {
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$metadata = new Metadata(trim($metadataString));
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} else {
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$metadata = null;
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}
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[$key, $value] = explode(self::EQUALS, $keyValue, 2);
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$key = urldecode($key);
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$value = urldecode($value);
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$key = str_replace(self::EXCLUDED_KEY_CHARS, '', trim($key), $invalidKeyCharacters);
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if (empty($key) || $invalidKeyCharacters > 0) {
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continue;
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}
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$value = str_replace(self::EXCLUDED_VALUE_CHARS, '', trim($value), $invalidValueCharacters);
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if (empty($value) || $invalidValueCharacters > 0) {
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continue;
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}
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$baggageBuilder->set($key, $value, $metadata);
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}
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}
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}
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