1 files changed, 45 insertions, 0 deletions
diff --git a/vendor/open-telemetry/exporter-otlp/OtlpUtil.php b/vendor/open-telemetry/exporter-otlp/OtlpUtil.php
new file mode 100644
index 000000000..6901c1324
--- /dev/null
+++ b/vendor/open-telemetry/exporter-otlp/OtlpUtil.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\Contrib\Otlp;
+
+use OpenTelemetry\API\Signals;
+use OpenTelemetry\SDK\Resource\Detectors\Sdk;
+use OpenTelemetry\SemConv\ResourceAttributes;
+use UnexpectedValueException;
+
+class OtlpUtil
+{
+    /**
+     * gRPC per-signal methods
+     * @see protobuf *ServiceClient
+     */
+    private const METHODS = [
+        Signals::TRACE => '/opentelemetry.proto.collector.trace.v1.TraceService/Export',
+        Signals::METRICS => '/opentelemetry.proto.collector.metrics.v1.MetricsService/Export',
+        Signals::LOGS => '/opentelemetry.proto.collector.logs.v1.LogsService/Export',
+    ];
+
+    public static function method(string $signal): string
+    {
+        if (!array_key_exists($signal, self::METHODS)) {
+            throw new UnexpectedValueException('gRPC method not defined for signal: ' . $signal);
+        }
+
+        return self::METHODS[$signal];
+    }
+
+    /**
+     * @link https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#user-agent
+     */
+    public static function getUserAgentHeader(): array
+    {
+        $resource = (new Sdk())->getResource();
+
+        return ['User-Agent' => sprintf(
+            'OTel OTLP Exporter PHP/%s',
+            $resource->getAttributes()->get(ResourceAttributes::TELEMETRY_SDK_VERSION) ?: 'unknown'
+        )];
+    }
+}