HttpClient.Send not supported in mac

Dani_S 3,086

Hi,

HttpClient.Send(request. HttpCompletionOption.ResponseHeaderRead) => not supported in mac

why? it work on windows.

Bruce (SqlWork.com) 59,131 Reputation points

2024-06-17T17:53:53.0733333+00:00

what do you mean by not supported? what error did you get?
Dani_S 3,086 Reputation points

2024-06-17T19:22:02.97+00:00

Not supported by platform
Dani_S 3,086 Reputation points

2024-06-18T07:02:59.69+00:00

     /// <summary>

        /// Send A POST request as stream to specific address in containing the value serilazed as json in reuest body

        /// <returns>Return The task object representing The asycronous opertaion</returns>

        public async Task<(Stream, string)> PostJsonAsyncReadAsStream()

        {

            if (!string.IsNullOrWhiteSpace(_token))

            {

                _client.DefaultRequestHeaders.Add("token", _token);

            }

            if (_defaultRequestHeaders != null)

            {

                foreach (KeyValuePair<string, string> defaultRequestHeader in _defaultRequestHeaders)

                {

                    _client.DefaultRequestHeaders.Add(defaultRequestHeader.Key, defaultRequestHeader.Value);

                }

            }

            //_client.Timeout = TimeSpan.FromMinutes(30);

           // _client.Timeout = TimeSpan.FromMilliseconds(Timeout.Infinite);

            _client.BaseAddress = new Uri(Constants.RequestBaseAddress);

            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "api/HandleFiles/PostDownloadFiles");

            request.Content = new FormUrlEncodedContent(new Dictionary<string, string>

            {

                 { "", _body}

            });



        //   _client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", "Base64Credetials");



             HttpResponseMessage httpResponse = _client.Send(request, HttpCompletionOption.ResponseHeadersRead); // exception throw here

            if (httpResponse.IsSuccessStatusCode)

            {

                var contentStream = await httpResponse.Content.ReadAsStreamAsync();

                if (contentStream == null )

                    return (null, null);

                var fileName = httpResponse.Content.Headers.ContentDisposition.FileName;

                return (contentStream, fileName);

            }

            return (null, null);

        }
Dani_S 3,086 Reputation points

2024-06-18T08:06:16.3666667+00:00

Your quick answer will be appreciated
Dani_S 3,086 Reputation points

2024-06-18T09:08:46.68+00:00

I got "operation not supported on this palatform"
Dani_S 3,086 Reputation points

2024-06-18T09:33:44.5266667+00:00

I try to download file from my website.
Bruce (SqlWork.com) 59,131 Reputation points

2024-06-18T19:45:19.08+00:00

the .net framework api is cross platform, meaning all entry points are defined on all platforms. but a platform need not implement all api calls, it can just throw not implemented.

you error means that that particular api is not support and probably a windows only implementation. You will need to pick an alternate. the only unsupported platform I see in HttpClient Send() is

[UnsupportedOSPlatform("browser")]

is your code Blazor?

note: httpclient code:

https://github.com/dotnet/runtime/blob/5535e31a712343a63f5d7d796cd874e563e5ac14/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs#L456

1 answer

Michael Taylor 50,106 Reputation points

2024-06-18T21:10:23.4466667+00:00
You're trying to use the sync version of the method. Sync methods, in general, are not recommended. For Mac you must use the async version (SendAsync).

//HttpResponseMessage httpResponse = _client.Send(request, HttpCompletionOption.ResponseHeadersRead); HttpResponseMessage httpResponse = await _client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead).ConfigureAwait(false);

You can read more here about why this decision was made but honestly nobody uses Send anyway and you're in the middle of an async all so there is no reason to use the sync version.
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Bruce (SqlWork.com) 59,131 Reputation points

2024-06-18T23:54:09.1233333+00:00

originally .net core only supported async I/O, but for compatability with porting from the old framework, many of the sync versions have been added.
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HttpClient.Send not supported in mac

1 answer