refactoring

Resolve #7779

packages/backend/src/services/drive/s3.ts

@@ -0,0 +1,24 @@
+import { URL } from 'url';
+import * as S3 from 'aws-sdk/clients/s3';
+import { Meta } from '@/models/entities/meta';
+import { getAgentByUrl } from '@/misc/fetch';
+
+export function getS3(meta: Meta) {
+	const u = meta.objectStorageEndpoint != null
+		? `${meta.objectStorageUseSSL ? 'https://' : 'http://'}${meta.objectStorageEndpoint}`
+		: `${meta.objectStorageUseSSL ? 'https://' : 'http://'}example.net`;
+
+	return new S3({
+		endpoint: meta.objectStorageEndpoint || undefined,
+		accessKeyId: meta.objectStorageAccessKey!,
+		secretAccessKey: meta.objectStorageSecretKey!,
+		region: meta.objectStorageRegion || undefined,
+		sslEnabled: meta.objectStorageUseSSL,
+		s3ForcePathStyle: !meta.objectStorageEndpoint	// AWS with endPoint omitted
+			? false
+			: meta.objectStorageS3ForcePathStyle,
+		httpOptions: {
+			agent: getAgentByUrl(new URL(u), !meta.objectStorageUseProxy)
+		}
+	});
+}