1 files changed, 17 insertions, 8 deletions
diff --git a/ext/node/polyfills/_fs/_fs_readFile.ts b/ext/node/polyfills/_fs/_fs_readFile.ts
index 0ff8a311a..b3bd5b94c 100644
--- a/ext/node/polyfills/_fs/_fs_readFile.ts
+++ b/ext/node/polyfills/_fs/_fs_readFile.ts
@@ -6,6 +6,8 @@ import {
   TextOptionsArgument,
 } from "ext:deno_node/_fs/_fs_common.ts";
 import { Buffer } from "ext:deno_node/buffer.ts";
+import { readAll } from "ext:deno_io/12_io.js";
+import { FileHandle } from "ext:deno_node/internal/fs/handle.ts";
 import { fromFileUrl } from "ext:deno_node/path.ts";
 import {
   BinaryEncodings,
@@ -32,25 +34,26 @@ type TextCallback = (err: Error | null, data?: string) => void;
 type BinaryCallback = (err: Error | null, data?: Buffer) => void;
 type GenericCallback = (err: Error | null, data?: string | Buffer) => void;
 type Callback = TextCallback | BinaryCallback | GenericCallback;
+type Path = string | URL | FileHandle;
 
 export function readFile(
-  path: string | URL,
+  path: Path,
   options: TextOptionsArgument,
   callback: TextCallback,
 ): void;
 export function readFile(
-  path: string | URL,
+  path: Path,
   options: BinaryOptionsArgument,
   callback: BinaryCallback,
 ): void;
 export function readFile(
-  path: string | URL,
+  path: Path,
   options: null | undefined | FileOptionsArgument,
   callback: BinaryCallback,
 ): void;
 export function readFile(path: string | URL, callback: BinaryCallback): void;
 export function readFile(
-  path: string | URL,
+  path: Path,
   optOrCallback?: FileOptionsArgument | Callback | null | undefined,
   callback?: Callback,
 ) {
@@ -64,7 +67,13 @@ export function readFile(
 
   const encoding = getEncoding(optOrCallback);
 
-  const p = Deno.readFile(path);
+  let p: Promise<Uint8Array>;
+  if (path instanceof FileHandle) {
+    const fsFile = new Deno.FsFile(path.fd);
+    p = readAll(fsFile);
+  } else {
+    p = Deno.readFile(path);
+  }
 
   if (cb) {
     p.then((data: Uint8Array) => {
@@ -79,9 +88,9 @@ export function readFile(
 }
 
 export const readFilePromise = promisify(readFile) as (
-  & ((path: string | URL, opt: TextOptionsArgument) => Promise<string>)
-  & ((path: string | URL, opt?: BinaryOptionsArgument) => Promise<Buffer>)
-  & ((path: string | URL, opt?: FileOptionsArgument) => Promise<Buffer>)
+  & ((path: Path, opt: TextOptionsArgument) => Promise<string>)
+  & ((path: Path, opt?: BinaryOptionsArgument) => Promise<Buffer>)
+  & ((path: Path, opt?: FileOptionsArgument) => Promise<Buffer>)
 );
 
 export function readFileSync(