Jul 22, 2018
When proxying a request to an underlying server, it is necessary to validate its SSL certificate. For example, if we have a process running on https://localhost:5001, we can configure Nginx to validate the certificate used by localhost:5001. But if we miss one step, we face the common error 502 Bad Gateway returned by Nginx. Today we will see two scenarios where we can face the error and how to fix them.
Jul 20, 2018
Internet is moving toward secure connections whereby HTTPS is a priority. Browsers are now warning users when navigating to non secured website. With this movement, Kestrel and ASPNET Core have adopted the mentality of security by default rather than security when needed. HTTPS will now be the default and HTTP will be a necessity due to implementation constraints. Together with Lets Encrypt and ACME protocol, we do not have excuses for not implementing an SSL connection.
Jul 16, 2018
ASP.NET Core 2.1 ships with a factory for HttpClient called HttpclientFactory. This factory allows us to no longer care about the lifecycle of the HttpClient by leaving it to the framework. Today we will see few ways of instantiating clients.
Jul 13, 2018
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 Websocket.
Jul 08, 2018
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.
Jul 07, 2018
This post shows how to fix an annoying automatic redirect issue in localhost.
Jul 06, 2018
To sign our JWT tokens, Identity Server 4 requires a signing credential. Today we will see how we can create our own key and provide it to Identity Server to be used as signing credential.
Jun 29, 2018
Few months ago we saw how to get started with Serilog. We discovered what was Serilog and the different concepts of settings, enrichers and sinks. Today we will see how we can take Serilog further and configure a logging mechanism for an application running in multi environment.
Jun 22, 2018
Few weeks ago I explained how we could setup a CI/CD pipeline whereby the runner would be on Windows and the last stage was to package the application. Today we will see how we can setup a runner on Ubuntu CI server and use it to build and deploy an ASP MET Core application onto a Ubuntu 16.04 server.
Jun 15, 2018
Few weeks ago I talked about LibMan which was a tools preinstalled on Visual Studio 2017 preview allowing local download of cdnjs minified css/js. Today I will show how we can configure Webpack with npm to manage libraries like Bootstrap and minify both css and js while applying all its good algorithm like tree shacking.
Jun 08, 2018
Grains states in Orleans are stored in a grain storage. Orleans ships with multiple highly available storage implementation like Azure blob storage or AWS Dynamodb. Today we will see how we can implement our own grain storage which will store grains on Minio, an open source free private cloud storage.
Jun 01, 2018
Few weeks ago I showed how to host ASP NET Core on Windows Server behind IIS. Compared to Windows Server, Ubuntu with nginx offers a quicker way to get started and a better control over the kestrel process. Today we will see how to host an ASP NET Core application on Ubuntu.
May 25, 2018
Kestrel is a lightweight standalone process. In order to host it on Linux, the recommended approach is to install it as a service. Systemd is a group of tools providing functionalities to manage processes on Ubuntu. Today we will see how we can manage an ASP NET Core application together with its Kestrel process using systemd tools.
May 18, 2018
Since I have installed Ubuntu as a subsystem, I see myself using more and more bash. The reason being that all the VMs I spin up are Ubuntu VMs. My interactions with my servers are very basic but even for those, there are many beautiful commands which ease my interactions. Today I would like to go through the commands and tips which I use on a daily basis.
May 11, 2018
Few weeks ago I discussed how we could create a healthchek library which would return json status of our application. Using the json, I wanted to make a quick page to display healthchecks in a nice visual. I wanted to quickly add Bootstrap and momentJS. For frontend libraries, I was used to use Bower as it nicely put every frontend package in /bower_components which can be served as static data. But since Bower was announcing that it was no longer supported and requested to use Yarn or NPM, I started to look around for an easier solution than those as I don’t really care about source code of the frontend libraries, all I want is the latest compiled versions. After few minutes of research, I found out that the team in Microsoft felt the same way as I did and already worked on a tool called Library manager (libman) and is available in VS Preview for the moment. Libman gives the benefit to allow developers to download locally the latest compiled version of the CSS or JS of their preferred frameworks for frontend usage. We can see Libman as a CDN file management for local usage. Today I will show how it can be used and combined with Razor pages to bring quickly pages to life.
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