streamToResponse replacement of new version?

[bexoss]

I am running express server, and below code works well.
The ai library version is "^2.2.31"

import { streamToResponse } from 'ai'

const apiHandler = async (req, res, next) => {
  try {
    const messages = req.body?.messages ?? []
    const query = getQuery(messages)
    const history = getHistory(messages)

    if (!query) throw new Error('empty query')
    if (query.length > 300) throw new Error('query too long')

    const stream = await run(query, history)

    streamToResponse(stream, res)
  } catch (err) {
    next(err)
  }
}

Using latest ai library, How do I change streamToResponse function?
As you know, streamToResponse function is gone after version 4.

streamToResponse has been removed in AI SDK 4.0. Use pipeDataStreamToResponse from streamText instead.

If I change the function to pipeDataStreamToResponse ,
The below error occured.

server error TypeError: response.writeHead is not a function

Can anyone help me?

[lgrammel]

We have removed the old approach of converting the output stream from 3rd party provider libraries (such as OpenAI) in 4.0 in favor to our standardized provider approach: https://sdk.vercel.ai/docs/ai-sdk-core/overview

You need to use AI SDK core and the related functions in 4.0