SignalR with ASP Net Core SignalR is a framework from ASP NET Core allowing us to establish a two way communication between client and server. This two way communication allows the client to send messages to the server but more importantly allows the server to push messages to the client. SignalR makes use of Websocket when available else it falls back to SSE or pulling. Today we will focus on how to setup SignalR to work with WSS, Websocket secure and how we can authenticate the user requesting to connect to our SignalR hub via Webscoket. Getting started with SignalR SSL encryption for Websocket Secure WSS Websocket Authentication with Identity Server 4 SignalR behind Nginx 1. Getting started with SignalR The Hubs are the main components of SignalR. It is an abstraction of a two way communication available for both client and server. Public functions from the hub can be called from the server code and can be called from the client. The frontend NPM package @aspnet/signalr
Microsoft Orleans logs warnings and errors Microsoft Orleans is a framework which helps building distributed system by implementing the actor model together with the concept of virtual actors, taking care of availability and concurrency. If you are unfamiliar with Microsoft Orleans, you can look at my previous blog post explaining the benefits of Microsoft Orleans . Even though Orleans promises to abstract the distributed system problems, there are instances where errors arise without us being able to understand what is going on. Lucky us, the logs are well documented… but only for those who can decrypt them. Today I will go through some of the errors and warnings which can be seen from silo and client so that you too can undestand what is going on. Enjoy! The code used to produce those errors can be found on my GitHub https://github.com/Kimserey/orleans-cluster-consul . 1. Client logs Logs on client appears with address {ip}:0 . 1.1. Can’t find implementation of interface An un
Verify dotnet SDK and runtime version installed To check your dotnet version installed, use dotnet --info . This command will display the SDKs and runtimes installed on your system together with the path where they can be found. For example on my Windows 10 development machine, dotnet --info will yield the following: > dotnet --info .NET Core SDK (reflecting any global.json): Version: 2.1 . 301 Commit: 59524873 d6 Runtime Environment: OS Name: Windows OS Version: 10.0 . 17134 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\ 2.1 . 301 \ Host (useful for support): Version: 2.1 . 1 Commit: 6985 b9f684 .NET Core SDKs installed: 2.1 . 4 [C:\Program Files\dotnet\sdk] 2.1 . 201 [C:\Program Files\dotnet\sdk] 2.1 . 300 [C:\Program Files\dotnet\sdk] 2.1 . 301 [C:\Program Files\dotnet\sdk] .NET Core runtimes installed: Microsoft.AspNetCore.All 2.1 . 0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.A
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