dbeaver/pro#7990 feat: add postForBlob helper function for using with export qm history servlets

Author: SychevAndrey

webapp/packages/core-utils/src/index.ts

@@ -89,3 +89,4 @@ export * from './bindFunctions.js';
 export * from './isNumber.js';
 export * from './getSubjectDifferences.js';
 export * from './downloadImage.js';
+export * from './postForBlob.js';

webapp/packages/core-utils/src/postForBlob.ts

@@ -0,0 +1,22 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2026 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+
+export async function postForBlob(url: string, payload: unknown): Promise<Blob> {
+  const response = await fetch(url, {
+    method: 'POST',
+    credentials: 'include',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+
+  if (!response.ok) {
+    throw new Error(`Request failed: ${response.status} ${response.statusText}`);
+  }
+
+  return await response.blob();
+}