AI对话接口采用流式返回：

1、使用Flurl处理返回的数据流

using Flurl;
using Flurl.Http;

[HttpPost]
public async Task<string> GetLiushiChatLaw()
{
    //1、请求参数，根据实际情况
    YourModel request = new YourModel();string allStr = "";　　 string chatLawApiUrl = "http://请求地址";
    //2、请求。接收类型流Stream,处理请求响应
    using (var stream = await chatLawApiUrl.WithHeader("Content-Type", "application/json")
          .SetQueryParams(new { access_token = "token" })
          .PostJsonAsync(request)
          .ReceiveStream())
    {
        // 逐块读取并处理响应内容
        var buffer = new byte[102];
        int bytesRead;

        while ((bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length)) > 0)
        {
            // 3、结果转换为字符串
            string content = System.Text.Encoding.UTF8.GetString(buffer, 0, bytesRead);
            allStr += content;
            _logger.LogInformation(content);
        }
    }

     return allStr;
}

2、HttpClient方式
public async Task<string> TestStream()
{
    string url = "http://localhost:9291/api/Duix/GetStream";
    string allStr = "";
    DuixRequest duixRequest = new DuixRequest()
    {
        sid = "1234567890",
        dh_question = "你好",
        dh_conversation_id = "1234567890",
        
    };
    var client = new HttpClient();
    using HttpRequestMessage httpRequestMessage = new HttpRequestMessage(HttpMethod.Post, url);
    var response = await client.SendAsync(httpRequestMessage, HttpCompletionOption.ResponseHeadersRead);
    await using var stream = await response.Content.ReadAsStreamAsync();
    var bytes = new byte[20];
    int writeLength = 0;
    string result = "";
    while ((writeLength = stream.Read(bytes, 0, bytes.Length)) > 0)
    {
        string content = Encoding.UTF8.GetString(bytes, 0, writeLength);
        result = result + content;
        Console.Write(Encoding.UTF8.GetString(bytes, 0, writeLength));
    }
    Console.WriteLine();
    Console.WriteLine("END");
    return result;
} 

参考文章： 

C# 使用Flurl http请求处理流式响应 - ziff123 - 博客园

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