无法将 HttpResponseMessage 反序列化为 object

Question

I am working on IHttpClientFactory in .net core 6 application to read httpClient data and object is to deserialize into object APIResponse

error

cannot convert string to System.IO.Stream

I have tried also ReadAsStreamAsync in which case get empty object.

Calling below method

var dd = _httpClientServices.GetRequestAsync<APIResponse>(httpClientConfig, null);

var response = await httpResponseMessage.Content.ReadAsStreamAsync();

 public class HttpClientServices : IHttpClientService
{
    private readonly IHttpClientFactory _httpClientFactory;

    public HttpClientServices(IHttpClientFactory httpClientFactory)
    {
        this._httpClientFactory = httpClientFactory;
    }

    public async Task<TResponse> GetRequestAsync<TResponse>(HttpClientConfig httpClientConfig, string token) where TResponse : class
    {
        try
        {
            var apiUri = QueryHelpers.AddQueryString(httpClientConfig.ClientAPIUrl, httpClientConfig.Parameters);

            HttpClient httpClient = CreateClient(httpClientConfig, null);

            HttpRequestMessage httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, apiUri);

            HttpResponseMessage httpResponseMessage = await httpClient.SendAsync(httpRequestMessage);

            if (httpResponseMessage.IsSuccessStatusCode)
            {
                var response = await httpResponseMessage.Content.ReadAsStringAsync();

                if (!string.IsNullOrEmpty(response))
                {
                    var responseData = await JsonSerializer.DeserializeAsync<TResponse>(response); //getting error here..............
                }
            }
        }
        catch (Exception ex)
        {
            throw;
        }

        return null;
    }

API Response Object

 public class APIResponse
{
    public APIResponseStatus APIResponseStatus { get; set; }
    public int RecordCount { get; set; }
    public dynamic? ResponseData { get; set; }
}

Answer 1

DeserializeAsync only accepts a Stream parameter, but response response is a string . There's no IO involved when deserializing an in-memory string, so a DeserializeAsync for strings wouldn't be useful.

The first solution would be to use Deserialize :

var responseData = JsonSerializer.Deserialize<TResponse>(response);

The second would be to read the response as a stream and deserialize asynchronously. This preserves memory for large responses because it doesn't have to allocate a string to contain the entire response before deserialization

var stream = await httpResponseMessage.Content.ReadAsStreamAsync();
var responseData = await JsonSerializer.DeserializeAsync<TResponse>(stream); 

Answer 2

var apiResponse = await httpResponseMessage.Content.ReadFromJsonAsync<APIResponse>();