init

web/lib/body.ts

@@ -0,0 +1,24 @@
+export const BILL_BODY_LIMIT = 64 * 1024;
+
+export async function readLimited(request: Request, max: number): Promise<string | null> {
+  const declared = request.headers.get("content-length");
+  if (declared && Number(declared) > max) return null;
+  const reader = request.body?.getReader();
+  if (!reader) return "";
+  let total = 0;
+  const decoder = new TextDecoder();
+  let text = "";
+  while (true) {
+    const { done, value } = await reader.read();
+    if (done) break;
+    if (!value) continue;
+    total += value.byteLength;
+    if (total > max) {
+      await reader.cancel();
+      return null;
+    }
+    text += decoder.decode(value, { stream: true });
+  }
+  text += decoder.decode();
+  return text;
+}