Revert "Remove readStream() helper"

This reverts commit 7611f2f.

Author: mjackson

packages/node-fetch-server/CHANGELOG.md

@@ -2,10 +2,6 @@
 
 This is the changelog for [`node-fetch-server`](https://github.com/mjackson/remix-the-web/tree/main/packages/node-fetch-server). It follows [semantic versioning](https://semver.org/).
 
-## HEAD
-
-- Remove internal `readStream()` helper and use async iterator directly
-
 ## v0.7.0 (2025-06-06)
 
 - Add `/src` to npm package, so "go to definition" goes to the actual source

packages/node-fetch-server/global.d.ts

@@ -0,0 +1,9 @@
+export async function* readStream(stream: ReadableStream<Uint8Array>): AsyncIterable<Uint8Array> {
+  let reader = stream.getReader();
+
+  while (true) {
+    const { done, value } = await reader.read();
+    if (done) break;
+    yield value;
+  }
+}

packages/node-fetch-server/src/lib/read-stream.ts

@@ -2,6 +2,7 @@ import type * as http from 'node:http';
 import type * as http2 from 'node:http2';
 
 import type { ClientAddress, ErrorHandler, FetchHandler } from './fetch-handler.ts';
+import { readStream } from './read-stream.ts';
 
 export interface RequestListenerOptions {
   /**
@@ -214,7 +215,7 @@ export async function sendResponse(
   res.writeHead(response.status, headers);
 
   if (response.body != null && res.req.method !== 'HEAD') {
-    for await (let chunk of response.body) {
+    for await (let chunk of readStream(response.body)) {
       // @ts-expect-error - Node typings for http2 require a 2nd parameter to write but it's optional
       res.write(chunk);
     }