Files v2

[philnash]

This pull request introduces the v2 files API to the Langflow clients, while also simplifying the existing upload API and making the tests more strict.

Enhancements to file upload functionality:

• src/files.ts: Added a new Files class to support the Langflow v2 file upload API, including methods for uploading files and listing uploaded files.
• src/index.ts: Integrated the new Files class into the LangflowClient class, enabling file upload and management features. [1] [2] [3]
• README.md: Updated documentation to include examples for file uploads using Langflow v1 and v2 APIs, along with usage instructions for image uploads and file tweaks. [1] [2]

Refactoring and dependency cleanup:

• package.json: Removed the unused mime dependency as file type detection is no longer required.
• src/flow.ts: Refactored the uploadFile method to accept File or Blob objects directly, eliminating the need for mime, fs/promises, and path imports. [1] [2] [3]

Improvements to test coverage:

• src/test/files.test.ts: Added comprehensive tests for the new Files class, covering file uploads and file listing functionality.
• Various test files (src/test/flow.test.ts, src/test/index.test.ts, etc.): Updated assertions to use node:assert/strict for stricter checks and modified tests to align with the refactored uploadFile method and asynchronous request handling. [1] [2] [3] [4]

[Copilot]

Pull Request Overview

Adds a new v2 Files API client, refactors existing file upload, removes unused dependencies, and tightens tests

• Introduce Files class (v2) and UserFile model for file upload and listing
• Refactor Flow.uploadFile to accept File/Blob directly and drop mime/fs/path dependencies
• Update types to broaden header support, remove mime, and convert tests to strict assertions with async handlers

Reviewed Changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/user_file.ts	Add UserFile class to wrap upload responses
src/types.ts	Broaden RequestOptions.headers type and define response interface
src/files.ts	Implement Files class with upload and list methods
src/index.ts	Integrate Files into LangflowClient
src/flow.ts	Refactor uploadFile to use File/Blob directly
package.json	Remove unused mime dependency
README.md	Add docs for v1 images and v2 file uploads
src/test/utils.ts	Update createMockFetch for async spies and add blob comparisons
src/test/files.test.ts	Add end-to-end tests for the v2 Files API

Comments suppressed due to low confidence (1)

src/files.ts:31

• Headers is not imported in this file, which will cause a runtime ReferenceError. Please import Headers from 'undici' or the global fetch implementation.

    const headers = new Headers();