Exception: RemoteCertificateChainErrors Rethrow as AggregateException

[Selzier]

Hello, I'm a Unity Developer building my project with .Net 4.6. I would like to use WAMP with Unity, as we already do tons of RPC calls in multiplayer game dev.

I'm following the documentation here, and have copied the sample script, replacing the url and subscribing to the correct feed:

I've successfully imported the DLLs into my Unity project and the script does not have any errors.

However, this script calls: channel.Open().Wait(5000);, which I receive the following error:

Exception: RemoteCertificateChainErrors
Rethrow as AggregateException: One or more errors occurred.
System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) (at <c95265f74fdf4905bfb0d5a4b652216c>:0)
System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) (at <c95265f74fdf4905bfb0d5a4b652216c>:0)
System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout) (at <c95265f74fdf4905bfb0d5a4b652216c>:0)
WAMPClientTest.Main () (at Assets/WAMPClientTest.cs:27)

I've tried to find out why this is happening, to no avail. Here's some info about my environment:
Building from: WampSharp-1.2.7.45-beta\src\net45\WampSharp.Default.Client
Unity version: 2017.3.0f3
Unity API Compatibility: .Net 4.6
Visual Studio 2017: - Right click WampSharp.Default.Client > Properties > Target Framework > .Net 4.6

Any ideas how I can get past this error and get WampSharp working with Unity?

[darkl]

What router are you trying to connect to? What is the inner exception?

Elad

[Selzier]

Thanks for the help Elad.

I'm trying to subscribe to the Poloniex API :
https://poloniex.com/support/api/
Server: wss://api.poloniex.com
Subscribe to: "ticker"

Here's an autobahn example:
https://pastebin.com/dMX7mZE0

I caught the exception, here it is:

InvalidCastException: Specified cast is not valid.
System.Reactive.PlatformServices.PlatformEnlightenmentProvider.CreatePlatformProvider () (at <688278ad98cb433c8f7d49b6fa93b621>:0)
System.Reactive.PlatformServices.PlatformEnlightenmentProvider..cctor () (at <688278ad98cb433c8f7d49b6fa93b621>:0)
Rethrow as TypeInitializationException: The type initializer for 'System.Reactive.PlatformServices.PlatformEnlightenmentProvider' threw an exception.
System.Reactive.Linq.QueryServices.Initialize () (at <dae9ef48b730438fa95f19e6ce1d672c>:0)
System.Reactive.Linq.QueryServices..cctor () (at <dae9ef48b730438fa95f19e6ce1d672c>:0)
Rethrow as TypeInitializationException: The type initializer for 'System.Reactive.Linq.QueryServices' threw an exception.
System.Reactive.Linq.Observable..cctor () (at <dae9ef48b730438fa95f19e6ce1d672c>:0)
Rethrow as TypeInitializationException: The type initializer for 'System.Reactive.Linq.Observable' threw an exception.
WampSharp.V2.WampClientSubject.CreateObservable (WampSharp.V2.Client.IWampTopicProxy topic, WampSharp.V2.Client.IWampClientConnectionMonitor monitor) (at C:/Users/Selzier/Desktop/WampSharp-1.2.7.45-beta/src/net45/WampSharp/WAMP2/V2/Api/Rx/WampClientSubject.cs:27)
WampSharp.V2.WampClientSubject..ctor (WampSharp.V2.Client.IWampTopicProxy topic, WampSharp.V2.Client.IWampClientConnectionMonitor monitor) (at C:/Users/Selzier/Desktop/WampSharp-1.2.7.45-beta/src/net45/WampSharp/WAMP2/V2/Api/Rx/WampClientSubject.cs:22)
WampSharp.V2.WampRealmProxyServiceProvider.GetSubject (System.String topicUri) (at C:/Users/Selzier/Desktop/WampSharp-1.2.7.45-beta/src/net45/WampSharp/WAMP2/V2/Api/Client/WampRealmProxyServiceProvider.cs:104)
WampSharp.V2.WampRealmProxyServiceProvider.GetSubject[TEvent] (System.String topicUri) (at C:/Users/Selzier/Desktop/WampSharp-1.2.7.45-beta/src/net45/WampSharp/WAMP2/V2/Api/Client/WampRealmProxyServiceProvider.cs:93)
WAMPClientTest.Main () (at Assets/WAMPClientTest.cs:40)

[darkl]

Looks like an issue with System.Reactive.
Can you maybe try to reference the .NET Standard 2.0 dlls of WampSharp?

Elad

[ufcpp]

I got the same problem.
Probably this is because you refer to System.Reactive.Core/Linq/Interface 3.0.0 directly and not to System.Reactive (which includes System.Reactive.PlatformServices).

The static constructor of the Observable class in System.Reactive.Core tries to load System.Reactive.PlatformServices by reflection if it exists. In Unity, the PlatformServices is found in MonoBleedingEdge/lib/mono/4.5 but its version is 2.2.0. And then, the cast is invalid because of loading the same class from other versions.

[darkl]

Can you guys try the new Unity beta? it is supposed to support netstandard2.0. Elad

[ufcpp]

I use Unity 2018 beta now, but this issue can be reproduced in Unity 2017.

[darkl]

To be honest, I don't think that referencing System.Reactive.PlatformServices will help, since this dll is only loaded by reflection in runtime, so it should not affect the compiled result.

The NuGet package does reference System.Reactive, as it should.

Elad

[ufcpp]

Out of Unity → The PlatformServices does not exist and the Observable ignores it at runtime.
In Unity → The Observable load the PlatformServices from Unity's library directory (MonoBleedingEdge/lib/mono/4.5)

I think this is Unity's problem. Unity contains Rx as a standard library...

[gicoprasico]

I have exactly the same problem. I checkout the trunk code, and reused the WampSharp\trunk\src\net45\Samples\WAMP2\WampSharp.Samples.Publisher sample, to subscribe it to Poloniex API as @Selzier wrote. I got the same problem. I am trying to use the WampSharp for a while now in order to subscribe to Poloniex push API but without success. Please guys, I do appreciate all the work you made, but I believe this nightmare with RX (System.Reactive) should be resolved. I will continue to check the code, but I am not sure if I know enough this project to come to the bottom on this issue.

[darkl]

If you guys want to connect to Poloniex api, you don't need WampSharp. See my comment in #232.

Elad

[darkl]

Leaving this open as this is a Unity issue and not a Poloniex api specific issue, but please see #234.

[darkl]

Dear Unity users,
please try WampSharp preview version from MyGet, targeted the .NET Standard 2.0.

In order to try it, you need to add a package source to https://www.myget.org/F/wampsharp/api/v3/index.json (Tools -> NuGet Package Manager -> Package Manager Settings -> Available packages sources -> + button).

This version uses System.Reactive v4.0, which no longer tries to load types via reflection. Please let me know if it works for you.

[errorsandwarnings]

@darkl : I tried this release with Unity 2018, It does not work.
I would be super happy if we can get WampSharp working in Unity.
Planning to use this for a multiplayer.