fix: Update OpenAIApi.cs for chunks incomplete bug

[SebastianBlandon]

when I received the messages by stream or chunks sometimes I received the last message incomplete, the reason was that the request.isDone() was set to false and finished receiving messages before receiving the message of finisih_reason of the OpenAI API, then I modified the logic so that it only closes the cycle when I get the stop in finish_reason that is the flag that warns me that it finished sending me chunks.

[SebastianBlandon]

Solved Issues:

https://github.com/srcnalt/OpenAI-Unity/issues/59 https://github.com/srcnalt/OpenAI-Unity/issues/50 https://github.com/srcnalt/OpenAI-Unity/issues/81

[BBrown4]

Edit: In fact, technically you don't even need to use isDone at all because the loop will break if the value contains [DONE] but better safe than sorry I guess?

Original: I'd recommend this instead:

request.SendWebRequest();
var isDone = false;

do
{
    List<T> dataList = new();

    var lines = request.downloadHandler.text.Split('\n').Where(line => line != "").ToArray();

    foreach (var line in lines)
    {
        var value = line.Replace("data:", "");

        Debug.Log(value);

        if (value.Contains("[DONE]"))
        {
            isDone = true;
            onComplete?.Invoke();
            break;
        }

        var data = JsonConvert.DeserializeObject<T>(value);

        if (data?.Error != null)
        {
            var error = data.Error;
            Debug.LogError($"Error message: {error.Message}\nError type: {error.Type}\n");
        }
        else
        {
            dataList.Add(data);
        }
    }

    onResponse?.Invoke(dataList);
    await Task.Yield();
} while (!isDone);

[David624634]

@srcnalt It would be greatly appreciated if this pull request could be merged so that the stream feature actually works without local changes.

[jplumi]

@srcnalt please merge this pull request.