.Net Core 3.1 - HTTP request - Send header and body separately

Question

I'm using legacy server, which requires that header and body in HTTP POST requests are sent separately. I suppose this is achieved with 'Expect: 100-continue', which is present in legacy's client message header.

I'm writing new client with use of Net Core 3.1, which seems doesn't have support of Expect100Continue in HttpWebRequest class (According to: https://github.com/dotnet/runtime/issues/25881)

Is there any possibility, to send HTTP request with Net Core 3.1 with separated body and header?

user_15123902 · Answer

Quick solution was turning off net core's HTTP handler with

AppContext.SetSwitch("System.Net.Http.UseSocketsHttpHandler", false);

After this switch, handler from .net framework is used. It looks like that SocketsHttpHandler (at least with combination with HttpWebRequest) doesn't support separated headers and bodies, even when HTTP 1.0 is used.

https://docs.microsoft.com/en-us/dotnet/api/system.appcontext.setswitch?view=netcore-3.1

.Net Core 3.1 - HTTP request - Send header and body separately

1 Answers