Upload file need the custom purpose support

[BenLampson]

Confirm this is a feature request for the .NET library and not the underlying OpenAI API

• This is a feature request for the .NET library

Describe the feature or improvement you are requesting

There's code below

  var fileClient = new OpenAIFileClient(new System.ClientModel.ApiKeyCredential("sk-xxxx"),
               new OpenAI.OpenAIClientOptions()
               {
                   Endpoint = new Uri("xxxx")
               });
  using var fs1 = File.OpenRead(@"D:\AITestTmpData\1.pdf"); 
  var res = fileClient.UploadFile(fs1, "1.pdf", purpose: "file-extract");

The question is whether Aliyun's service has a custom purpose key. So I can't use.

But Python's lib works fine with this code.
The code below is Aliyun's demo code.

import os
from pathlib import Path
from openai import OpenAI

client = OpenAI(
    # 若没有配置环境变量，请用百炼API Key将下行替换为：api_key="sk-xxx",
    api_key=os.getenv("DASHSCOPE_API_KEY"),
    base_url="https://dashscope.aliyuncs.com/compatible-mode/v1",
)

# test.txt 是一个本地示例文件
file_object = client.files.create(file=Path("test.txt"), purpose="file-extract")

print(file_object.model_dump_json())

Additional context

No response

[jsquire]

Hi @BenLampson. Thanks for reaching out and for your inquiry. Can you help us understand what you're asking about or what feature you are requesting?