Bug 17582 - Trying to run SignalR on Linux, failing with this error:
Summary: Trying to run SignalR on Linux, failing with this error:
Alias: None
Product: Class Libraries
Classification: Mono
Component: General ()
Version: 3.2.x
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Martin Baulig
Depends on:
Reported: 2014-02-03 20:16 UTC by Paul
Modified: 2014-03-04 09:44 UTC (History)
3 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Paul 2014-02-03 20:16:24 UTC
01:11:51.4425760 - null - ChangeState(Disconnected, Connecting)
01:11:53.7506470 - null - Disconnected
01:11:53.7694850 - null - Transport.Dispose()
01:11:53.7753800 - null - Closed
04/02/2014 01:11:54 [Error] There was an error opening the connection:System.NotImplementedException: This method must be implemented in derived classes
  at System.Net.WebRequest.set_ImpersonationLevel (TokenImpersonationLevel value) [0x00000] in <filename unknown>:0
  at (wrapper remoting-invoke-with-check) System.Net.WebRequest:set_ImpersonationLevel (System.Security.Principal.TokenImpersonationLevel)
  at System.Net.Http.WebRequestHandler.CreateWebRequest (System.Net.Http.HttpRequestMessage request) [0x00000] in <filename unknown>:0
  at System.Net.Http.HttpClientHandler+<SendAsync>c__asyncC.MoveNext () [0x00000] in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0
  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async5.MoveNext () [0x00000] in <filename unknown>:0
Comment 1 Paul 2014-02-03 20:17:13 UTC
How can we get the "System.Net.WebRequest.set_ImpersonationLevel" implemented in mono?
Comment 2 Mikayla Hutchinson [MSFT] 2014-02-03 22:58:13 UTC
AFAICT our WebRequestHandler implementation does not take into account the fact that our HttpWebRequest does not implement ImpersonationLevel.
Comment 3 Paul 2014-02-04 09:46:46 UTC
So what would it take to implement the "ImpersonationLevel"? Also, can you point me to the source so I can have a look, and think about other workarounds? Thanks
Comment 4 Paul 2014-02-04 17:24:10 UTC
Looks like the problem can be found here: https://github.com/search?q=ImpersonationLevel+NotImplementedException&type=Code&ref=searchresults
Comment 5 Paul 2014-02-07 20:09:04 UTC
Here is the specific place where the issue is. How can we get this fixed? Can I fix this in GitHub for you guys? I really need this fixed, this is a major blocking issue, which I can't find a workaround to.

Comment 6 Miguel de Icaza [MSFT] 2014-02-11 21:58:02 UTC
Ok, the method is now in Mono.

How were you trying to run SignalR?   I would like to try myself.
Comment 7 Redth 2014-03-04 09:44:52 UTC
@Miguel there's a code sample here in the SignalR issue


I too can confirm I'm receiving this error currently with Mono 3.2.6 on Mac...