1 files changed, 95 insertions, 0 deletions
diff --git a/lib/private/Profiler/BuiltInProfiler.php b/lib/private/Profiler/BuiltInProfiler.php
new file mode 100644
index 00000000000..0a62365e901
--- /dev/null
+++ b/lib/private/Profiler/BuiltInProfiler.php
@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+namespace OC\Profiler;
+
+use DateTime;
+use OCP\IConfig;
+use OCP\IRequest;
+
+class BuiltInProfiler {
+	private \ExcimerProfiler $excimer;
+
+	public function __construct(
+		private IConfig $config,
+		private IRequest $request,
+	) {
+	}
+
+	public function start(): void {
+		if (!extension_loaded('excimer')) {
+			return;
+		}
+
+		$shouldProfileSingleRequest = $this->shouldProfileSingleRequest();
+		$shouldSample = $this->config->getSystemValueBool('profiling.sample') && !$shouldProfileSingleRequest;
+
+
+		if (!$shouldProfileSingleRequest && !$shouldSample) {
+			return;
+		}
+
+		$requestRate = $this->config->getSystemValue('profiling.request.rate', 0.001);
+		$sampleRate = $this->config->getSystemValue('profiling.sample.rate', 1.0);
+		$eventType = $this->config->getSystemValue('profiling.event_type', EXCIMER_REAL);
+
+
+		$this->excimer = new \ExcimerProfiler();
+		$this->excimer->setPeriod($shouldProfileSingleRequest ? $requestRate : $sampleRate);
+		$this->excimer->setEventType($eventType);
+		$this->excimer->setMaxDepth(250);
+
+		if ($shouldSample) {
+			$this->excimer->setFlushCallback([$this, 'handleSampleFlush'], 1);
+		}
+
+		$this->excimer->start();
+		register_shutdown_function([$this, 'handleShutdown']);
+	}
+
+	public function handleSampleFlush(\ExcimerLog $log): void {
+		file_put_contents($this->getSampleFilename(), $log->formatCollapsed(), FILE_APPEND);
+	}
+
+	public function handleShutdown(): void {
+		$this->excimer->stop();
+
+		if (!$this->shouldProfileSingleRequest()) {
+			$this->excimer->flush();
+			return;
+		}
+
+		$request = \OCP\Server::get(IRequest::class);
+		$data = $this->excimer->getLog()->getSpeedscopeData();
+
+		$data['profiles'][0]['name'] = $request->getMethod() . ' ' . $request->getRequestUri() . ' ' . $request->getId();
+
+		file_put_contents($this->getProfileFilename(), json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
+	}
+
+	private function shouldProfileSingleRequest(): bool {
+		$shouldProfileSingleRequest = $this->config->getSystemValueBool('profiling.request', false);
+		$profileSecret = $this->config->getSystemValueString('profiling.secret', '');
+		$secretParam = $this->request->getParam('profile_secret') ?? null;
+		return $shouldProfileSingleRequest || (!empty($profileSecret) && $profileSecret === $secretParam);
+	}
+
+	private function getSampleFilename(): string {
+		$profilePath = $this->config->getSystemValueString('profiling.path', '/tmp');
+		$sampleRotation = $this->config->getSystemValueInt('profiling.sample.rotation', 60);
+		$timestamp = floor(time() / ($sampleRotation * 60)) * ($sampleRotation * 60);
+		$sampleName = date('Y-m-d_Hi', (int)$timestamp);
+		return $profilePath . '/sample-' . $sampleName . '.log';
+	}
+
+	private function getProfileFilename(): string {
+		$profilePath = $this->config->getSystemValueString('profiling.path', '/tmp');
+		$requestId = $this->request->getId();
+		return $profilePath . '/profile-' . (new DateTime)->format('Y-m-d_His_v') . '-' . $requestId . '.json';
+	}
+}