Kimserey's blog

Inspect proxied requests from Nginx to Kestrel with Mitmproxy In previous blog posts, we saw how to proxy requests to an ASP NET Core application using Nginx . We saw that request headers also can be proxied with proxy_set_header In order to ease development, we need to be able to debug the values to verify that they are what we expect. Today we will see two methods to inspect the proxied requests. This post will be composed by two parts: Nginx location routing Nginx variable debugging Nginx proxied request debug with Mitmproxy 1 Nginx location routing Considering the following configuration of our server: server { listen 80; location / { proxy_pass http://localhost:5000; } location /api/ { proxy_pass http://localhost:5001/; } } If we want to check whether our location routes are properly configured, we can short circuit the proxy_pass with return and use curl to check whether the location is properly selected. server { listen ...

HTTPS with SSL for Nginx, Kestrel and Angular 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. Setup the example SSL self signed certificate for Nginx SSL self signed certificate for Kestrel SSL self signed certificate for Angular CLI 1. Setup the example We assume that our environment is on Ubuntu, with nginx and dotnet installed. If you are on Windows, you can install the linux subsystem with Ubuntu 16.04 as describe on my previous post . This will give access to most of the features of Ubuntu via a bash prompt. To start we create a HelloWorld applicatio...

Manage Kestrel process with systemd 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. This post will be composed of three parts: Introduction Managing process with systemctl Debugging using journalctl 1. Introduction ASP NET Core application runs on top of Kestrel which is a lightweight standalone webserver. To be able to start to interact with our Ubuntu server we need to first establish an ssh connection. If you aren’t familiar with ssh, you can refer to my previous blog post where I provide explanations on how to setup ssh . Once we are on the server, we can get our libraries on the server and run: /usr/share/dotnet/dotnet myapp.dll This will run the app from the current session. When we ex...