1 files changed, 69 insertions, 0 deletions
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);
+        }
+    }
+}