1 files changed, 78 insertions, 0 deletions
diff --git a/ext/node/polyfills/stream/consumers.mjs b/ext/node/polyfills/stream/consumers.mjs
new file mode 100644
index 000000000..61fe27020
--- /dev/null
+++ b/ext/node/polyfills/stream/consumers.mjs
@@ -0,0 +1,78 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+
+import { TextDecoder } from "internal:deno_web/08_text_encoding.js";
+import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+
+/**
+ * @typedef {import('../_global.d.ts').ReadableStream
+ * } ReadableStream
+ * @typedef {import('../_stream.d.ts')} Readable
+ */
+
+/**
+ * @param {AsyncIterable|ReadableStream|Readable} stream
+ * @returns {Promise<Blob>}
+ */
+async function blob(stream) {
+  const chunks = [];
+  for await (const chunk of stream) {
+    chunks.push(chunk);
+  }
+  return new Blob(chunks);
+}
+
+/**
+ * @param {AsyncIterable|ReadableStream|Readable} stream
+ * @returns {Promise<ArrayBuffer>}
+ */
+async function arrayBuffer(stream) {
+  const ret = await blob(stream);
+  return ret.arrayBuffer();
+}
+
+/**
+ * @param {AsyncIterable|ReadableStream|Readable} stream
+ * @returns {Promise<Buffer>}
+ */
+async function buffer(stream) {
+  return Buffer.from(await arrayBuffer(stream));
+}
+
+/**
+ * @param {AsyncIterable|ReadableStream|Readable} stream
+ * @returns {Promise<string>}
+ */
+async function text(stream) {
+  const dec = new TextDecoder();
+  let str = "";
+  for await (const chunk of stream) {
+    if (typeof chunk === "string") {
+      str += chunk;
+    } else {
+      str += dec.decode(chunk, { stream: true });
+    }
+  }
+  // Flush the streaming TextDecoder so that any pending
+  // incomplete multibyte characters are handled.
+  str += dec.decode(undefined, { stream: false });
+  return str;
+}
+
+/**
+ * @param {AsyncIterable|ReadableStream|Readable} stream
+ * @returns {Promise<any>}
+ */
+async function json(stream) {
+  const str = await text(stream);
+  return JSON.parse(str);
+}
+
+export default {
+  arrayBuffer,
+  blob,
+  buffer,
+  json,
+  text,
+};
+export { arrayBuffer, blob, buffer, json, text };