Connection keep-alive not working with System.Net.Http.HttpClient on certain hosts

Question

I\'m experimenting with the Heroku API using the .NET System.Net.Http.HttpClient. In particular, I want keep-alive to work so that I can send many

Answer 1

Use WebRequestHandler class instead of HttpClientHandler and set property HttpWebRequest.UnsafeAuthenticatedConnectionSharing to True.

Answer 2

Some proxy servers will ignore the keep-alive when doing their authentication. If I recall correctly it's when the proxy server uses NTLM authentication.

In the past, I've had to add a partial class to "help" some web service proxy classes.

I overrode the GetWebRequest(Uri uri) method with

System.Net.HttpWebRequest webRequest = 
        (System.Net.HttpWebRequest)base.GetWebRequest(uri);
webRequest.ProtocolVersion = HttpVersion.Veraion10;  // I know this is strange, but it works
webRequest.ServicePoint.Expect100Continue = false;  // This is where the magic lives
return webRequest;