HttpClient.Send not supported in MAUI running on Android or iOS causing PlatformNotSupportedException #104716
Description
Description
HttpClient.Send is not supported in a MAUI app running on Android or iOS, though on Windows, it is OK.
Reproduction Steps
public DemoWebApi.Controllers.Client.Hero[] GetHeroes(Action<System.Net.Http.Headers.HttpRequestHeaders> handleHeaders = null)
{
var requestUri = "api/Heroes";
using var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, requestUri);
handleHeaders?.Invoke(httpRequestMessage.Headers);
var responseMessage = client.Send(httpRequestMessage);
try
{
responseMessage.EnsureSuccessStatusCodeEx();
if (responseMessage.StatusCode == System.Net.HttpStatusCode.NoContent) { return null; }
var stream = responseMessage.Content.ReadAsStream();
return JsonSerializer.Deserialize<DemoWebApi.Controllers.Client.Hero[]>(stream, jsonSerializerSettings);
}
finally
{
responseMessage.Dispose();
}
}Checkout branch: https://github.com/zijianhuang/DemoCoreWeb/tree/HttpClientSend_Bug
And run one of the MAUI mobile app:
- MauiHeroes.Droid
- MauiHeroes.IOS
- Fonlow.MauiHeroes on Android or iOS
Expected behavior
Expected the codes work like "HttpClient.SendAsync(...).Result".
Actual behavior
Error:
System.PlatformNotSupportedException: 'Operation is not supported on this platform.'
When running client.Send(httpRequestMessage)
Regression?
Related to dotnet/maui#10470
Known Workarounds
client.SendAsync(httpRequestMessage).Result;Configuration
latest .NET 8 as of 2024-07-11
latest MAUI dependencies
Other information
[UnsupportedOSPlatform("browser")]
public HttpResponseMessage Send(HttpRequestMessage request) =>
Send(request, DefaultCompletionOption, cancellationToken: default);Respective prototypes should have got Android and iOS included in UnsupportedOSPlatform attributes. And it will be even better that the implementation of Send is supported in Android and iOS.