400 'file' is a required property when Creating File in CloudFlare Worker

[EvanPiro]

Confirm this is a Node library issue and not an underlying OpenAI API issue

• This is an issue with the Node library

Describe the bug

I get the following error when I try to create a file from a CloudFlare worker environment.

 {
      error: {
        message: "'file' is a required property",
        type: 'invalid_request_error',
        param: null,
        code: null
      }
    }

I'm able to successfully create a file from a vanilla nodejs environment. I've also confirmed that CURL requests are working.

To Reproduce

Run the following code in a CloudFlare worker environment.

 const llm = new OpenAI({
    apiKey: env.OPENAI_API_KEY,
  });

  
  const file = await toFile(
    new FormDataBlob([
      new TextEncoder().encode("text is here"),
    ]),
    "finetune.jsonl"
  );

  const res = await llm.files.create({
    file,
    purpose: "fine-tune",
  });

Code snippets

No response

OS

macOS

Node version

v18.0.0

Library version

4.38.5

[EvanPiro]

Has anyone else experienced this? This is a product level blocker on my end and I'm willing to assist in the fix.

[rattrayalex]

Thanks for reporting, we'll take a look soon. In the meantime, you might try methods other than FormDataBlob to instantiate the file contents, like converting the string to an ArrayBuffer.

[benogle]

I came up against this as well. I was trying to upload a PDF, but couldn't get the lib to accept anything other than a FsFileStream from fs.createReadStream. Not blobs, buffers, formdata Files, nothing. It'd either error with the OP's 'file' is required property, or reject the type in addFormValue.

It'd be nice if it could accept a regular Readable stream, not just a file stream from fs. Or maybe a custom openai File object that specified the buffer/stream plus filename and other file metadata that a plain stream / buffer doesn't specify.

After looking at the code, my workaround was to make something that would pass through isFileLike(). This works:

const file = {
  type: 'application/pdf',
  name: 'test.pdf',
  filename: 'test.pdf',
  lastModified: new Date().getTime(),
  arrayBuffer: () => convertThingYouHaveToBuffer(),

  // It doesn't use these, but it needs them to work around type checking
  size: 1,
  text: () => '',
  slice: () => [],
}

[EvanPiro]

@benogle I've tried that and am still getting the same error. Here is my code:

    const id = uuidv4();

    await env.DOC_BUCKET.put(id, trainingStr);

    const obj = await env.DOC_BUCKET.get(id);

    const file = {
      type: "application/jsonl",
      name: "training.jsonl",
      filename: "training.jsonl",
      lastModified: new Date().getTime(),
      arrayBuffer: async () => await obj.arrayBuffer(),

      // It doesn't use these, but it needs them to work around type checking
      size: 1,
      text: async () => await obj.text(),
      slice: (): any => [],
    };

    const res = await llm.files.create({
      file,
      purpose: "fine-tune",
    });