2 files changed, 161 insertions, 0 deletions
diff --git a/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php b/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php
new file mode 100644
index 000000000..fae62dcab
--- /dev/null
+++ b/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Baggage\Propagation;
+
+use OpenTelemetry\API\Baggage\Baggage;
+use OpenTelemetry\API\Baggage\BaggageBuilderInterface;
+use OpenTelemetry\API\Baggage\Entry; /** @phan-suppress-current-line PhanUnreferencedUseNormal */
+use OpenTelemetry\Context\Context;
+use OpenTelemetry\Context\ContextInterface;
+use OpenTelemetry\Context\Propagation\ArrayAccessGetterSetter;
+use OpenTelemetry\Context\Propagation\PropagationGetterInterface;
+use OpenTelemetry\Context\Propagation\PropagationSetterInterface;
+use OpenTelemetry\Context\Propagation\TextMapPropagatorInterface;
+use function rtrim;
+use function urlencode;
+
+/**
+ * @see https://www.w3.org/TR/baggage
+ */
+final class BaggagePropagator implements TextMapPropagatorInterface
+{
+    public const BAGGAGE = 'baggage';
+
+    private static ?self $instance = null;
+
+    public static function getInstance(): self
+    {
+        if (null === self::$instance) {
+            self::$instance = new self();
+        }
+
+        return self::$instance;
+    }
+
+    public function fields(): array
+    {
+        return [self::BAGGAGE];
+    }
+
+    public function inject(&$carrier, PropagationSetterInterface $setter = null, ContextInterface $context = null): void
+    {
+        $setter ??= ArrayAccessGetterSetter::getInstance();
+        $context ??= Context::getCurrent();
+
+        $baggage = Baggage::fromContext($context);
+
+        if ($baggage->isEmpty()) {
+            return;
+        }
+
+        $headerString = '';
+
+        /** @var Entry $entry */
+        foreach ($baggage->getAll() as $key => $entry) {
+            $value = urlencode($entry->getValue());
+            $headerString.= "{$key}={$value}";
+
+            if (($metadata = $entry->getMetadata()->getValue()) !== '' && ($metadata = $entry->getMetadata()->getValue()) !== '0') {
+                $headerString .= ";{$metadata}";
+            }
+
+            $headerString .= ',';
+        }
+
+        if ($headerString !== '' && $headerString !== '0') {
+            $headerString = rtrim($headerString, ',');
+            $setter->set($carrier, self::BAGGAGE, $headerString);
+        }
+    }
+
+    public function extract($carrier, PropagationGetterInterface $getter = null, ContextInterface $context = null): ContextInterface
+    {
+        $getter ??= ArrayAccessGetterSetter::getInstance();
+        $context ??= Context::getCurrent();
+
+        if (!$baggageHeader = $getter->get($carrier, self::BAGGAGE)) {
+            return $context;
+        }
+
+        $baggageBuilder = Baggage::getBuilder();
+        $this->extractValue($baggageHeader, $baggageBuilder);
+
+        return $context->withContextValue($baggageBuilder->build());
+    }
+
+    private function extractValue(string $baggageHeader, BaggageBuilderInterface $baggageBuilder): void
+    {
+        (new Parser($baggageHeader))->parseInto($baggageBuilder);
+    }
+}
diff --git a/vendor/open-telemetry/api/Baggage/Propagation/Parser.php b/vendor/open-telemetry/api/Baggage/Propagation/Parser.php
new file mode 100644
index 000000000..3518b858d
--- /dev/null
+++ b/vendor/open-telemetry/api/Baggage/Propagation/Parser.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Baggage\Propagation;
+
+use function explode;
+use OpenTelemetry\API\Baggage\BaggageBuilderInterface;
+use OpenTelemetry\API\Baggage\Metadata;
+use function str_replace;
+use function trim;
+use function urldecode;
+
+final class Parser
+{
+    private const EXCLUDED_KEY_CHARS = [' ', '(', ')', '<', '>', '@', ',', ';', ':', '\\', '"', '/', '[', ']', '?', '=', '{', '}'];
+    private const EXCLUDED_VALUE_CHARS = [' ', '"', ',', ';', '\\'];
+    private const EQUALS = '=';
+
+    /** @readonly */
+    private string $baggageHeader;
+
+    public function __construct(string $baggageHeader)
+    {
+        $this->baggageHeader = $baggageHeader;
+    }
+
+    public function parseInto(BaggageBuilderInterface $baggageBuilder): void
+    {
+        foreach (explode(',', $this->baggageHeader) as $baggageString) {
+            if (empty(trim($baggageString))) {
+                continue;
+            }
+
+            $explodedString = explode(';', $baggageString, 2);
+
+            $keyValue = trim($explodedString[0]);
+
+            if (empty($keyValue) || mb_strpos($keyValue, self::EQUALS) === false) {
+                continue;
+            }
+
+            $metadataString = $explodedString[1] ?? null;
+
+            if ($metadataString && !empty(trim(($metadataString)))) {
+                $metadata = new Metadata(trim($metadataString));
+            } else {
+                $metadata = null;
+            }
+
+            [$key, $value] = explode(self::EQUALS, $keyValue, 2);
+
+            $key = urldecode($key);
+            $value = urldecode($value);
+
+            $key = str_replace(self::EXCLUDED_KEY_CHARS, '', trim($key), $invalidKeyCharacters);
+            if (empty($key) || $invalidKeyCharacters > 0) {
+                continue;
+            }
+
+            $value = str_replace(self::EXCLUDED_VALUE_CHARS, '', trim($value), $invalidValueCharacters);
+            if (empty($value) || $invalidValueCharacters > 0) {
+                continue;
+            }
+
+            $baggageBuilder->set($key, $value, $metadata);
+        }
+    }
+}