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server/util/convertBytesLikeToArrayBuffer.ts

@@ -0,0 +1,17 @@
+import type { BytesLike } from "./BytesLike";
+
+export function convertBytesLikeToArrayBuffer(data: BytesLike, encodeUTF8 = true): ArrayBuffer{
+    if (data instanceof ArrayBuffer) {
+        return data;
+    }
+    if (data instanceof Uint8Array) {
+        return data.buffer;
+    }
+    if (typeof(data) === 'string'){
+        if(encodeUTF8){
+            return (new TextEncoder()).encode(data);
+        }
+        return new Uint8Array(data.split('').map(s=>s.codePointAt(0) as number));
+    }
+    return data.buffer;
+}