chore(client): only accept standard types for file uploads

Author: stainless-ci-bot

scripts/build

@@ -40,8 +40,8 @@ cp dist/index.d.ts dist/index.d.mts
 cp tsconfig.dist-src.json dist/src/tsconfig.json
 cp src/internal/shim-types.d.ts dist/internal/shim-types.d.ts
 cp src/internal/shim-types.d.ts dist/internal/shim-types.d.mts
-mkdir -p dist/internal/polyfill
-cp src/internal/polyfill/*.{mjs,js,d.ts} dist/internal/polyfill
+mkdir -p dist/internal/shims
+cp src/internal/shims/*.{mjs,js,d.ts} dist/internal/shims
 
 node scripts/utils/postprocess-files.cjs
 

src/client.ts

@@ -674,7 +674,9 @@ export class BaseAnthropic {
 
     const timeout = setTimeout(() => controller.abort(), ms);
 
-    const isReadableBody = Shims.isReadableLike(options.body);
+    const isReadableBody =
+      ((globalThis as any).ReadableStream && options.body instanceof (globalThis as any).ReadableStream) ||
+      (typeof options.body === 'object' && options.body !== null && Symbol.asyncIterator in options.body);
 
     const fetchOptions: RequestInit = {
       signal: controller.signal as any,

src/internal/polyfill/file.node.d.ts

@@ -20,62 +20,6 @@ export function getDefaultFetch(): Fetch {
   );
 }
 
-/**
- * A minimal copy of the NodeJS `stream.Readable` class so that we can
- * accept the NodeJS types in certain places, e.g. file uploads
- *
- * https://nodejs.org/api/stream.html#class-streamreadable
- */
-export interface ReadableLike {
-  readable: boolean;
-  readonly readableEnded: boolean;
-  readonly readableFlowing: boolean | null;
-  readonly readableHighWaterMark: number;
-  readonly readableLength: number;
-  readonly readableObjectMode: boolean;
-  destroyed: boolean;
-  read(size?: number): any;
-  pause(): this;
-  resume(): this;
-  isPaused(): boolean;
-  destroy(error?: Error): this;
-  [Symbol.asyncIterator](): AsyncIterableIterator<any>;
-}
-
-/**
- * Determines if the given value looks like a NodeJS `stream.Readable`
- * object and that it is readable, i.e. has not been consumed.
- *
- * https://nodejs.org/api/stream.html#class-streamreadable
- */
-export function isReadableLike(value: any) {
-  // We declare our own class of Readable here, so it's not feasible to
-  // do an 'instanceof' check. Instead, check for Readable-like properties.
-  return !!value && value.readable === true && typeof value.read === 'function';
-}
-
-/**
- * A minimal copy of the NodeJS `fs.ReadStream` class for usage within file uploads.
- *
- * https://nodejs.org/api/fs.html#class-fsreadstream
- */
-export interface FsReadStreamLike extends ReadableLike {
-  path: {}; // real type is string | Buffer but we can't reference `Buffer` here
-}
-
-/**
- * Determines if the given value looks like a NodeJS `fs.ReadStream`
- * object.
- *
- * This just checks if the object matches our `Readable` interface
- * and defines a `path` property, there may be false positives.
- *
- * https://nodejs.org/api/fs.html#class-fsreadstream
- */
-export function isFsReadStreamLike(value: any): value is FsReadStreamLike {
-  return isReadableLike(value) && 'path' in value;
-}
-
 type ReadableStreamArgs = ConstructorParameters<typeof ReadableStream>;
 
 export function makeReadableStream(...args: ReadableStreamArgs): ReadableStream {

src/internal/polyfill/file.node.js

@@ -0,0 +1,20 @@
+// The infer is to make TS show it as a nice union type,
+// instead of literally `ConstructorParameters<typeof Blob>[0]`
+type FallbackBlobSource = ConstructorParameters<typeof Blob>[0] extends infer T ? T : never;
+/**
+ * A [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File) provides information about files.
+ */
+declare class FallbackFile extends Blob {
+  constructor(sources: FallbackBlobSource, fileName: string, options?: any);
+  /**
+   * The name of the `File`.
+   */
+  readonly name: string;
+  /**
+   * The last modified date of the `File`.
+   */
+  readonly lastModified: number;
+}
+export type File = InstanceType<typeof File>;
+export const File: typeof globalThis extends { File: infer fileConstructor } ? fileConstructor
+: typeof FallbackFile;