fix: validation (better #8456) (#8461)

* Revert "revert 484e023c0"

This reverts commit c03b70c949.

* also allow pure renote

* fix checks for pure renote

packages/backend/src/server/api/endpoints/drive/files/show.ts

@@ -28,22 +28,25 @@ export const meta = {
 			code: 'ACCESS_DENIED',
 			id: '25b73c73-68b1-41d0-bad1-381cfdf6579f',
 		},
-
-		fileIdOrUrlRequired: {
-			message: 'fileId or url required.',
-			code: 'INVALID_PARAM',
-			id: '89674805-722c-440c-8d88-5641830dc3e4',
-		},
 	},
 } as const;
 
 export const paramDef = {
 	type: 'object',
-	properties: {
-		fileId: { type: 'string', format: 'misskey:id' },
-		url: { type: 'string' },
-	},
-	required: [],
+	anyOf: [
+		{
+			properties: {
+				fileId: { type: 'string', format: 'misskey:id' },
+			},
+			required: ['fileId'],
+		},
+		{
+			properties: {
+				url: { type: 'string' },
+			},
+			required: ['url'],
+		},
+	],
 } as const;
 
 // eslint-disable-next-line import/no-default-export
@@ -62,8 +65,6 @@ export default define(meta, paramDef, async (ps, user) => {
 				thumbnailUrl: ps.url,
 			}],
 		});
-	} else {
-		throw new ApiError(meta.errors.fileIdOrUrlRequired);
 	}
 
 	if (file == null) {