HttpClient

Simple example showing how to download a file using HttpClient and GetStreamAsync.

There are so many ways to make and deserialize an HTTP GET request. In this post, I’ll show a few approaches.

Let’s Encrypt updated their root cert recently and now calls from some systems to APIs that use Let’s Encrypt certs are failing. Here’s one way to fix it with Polly and the HttpClientHandler.

I’ve been playing with Step Functions for a while and wanted to see if I could use them to orchestrate a bunch of API calls, processes the responses, make decisions, etc. This post shows how to combine a single Lambda, HttpClient, and Step Functions to achieve this.

Full source code here. A non .NET developer friend asked me to help him write a sample C# application that exercises a POST endpoint he wrote, it requires Basic authorization. After a quick search, I found that there are relatively few good examples of doing this in .

Full source code here. I have been using HttpClientFactory for a while and have generally preferred using named clients over typed clients. With a named client you get the HttpClient just before you are going to use it, and you have full access to the HttpResponse at the point you make the call to the remote service.

Full source code here. Over the past week I have written a few articles about HttpClientFactory and dependency injection in .NET Core 2.1. There is one scenario I didn’t deal with - calling a HttpClient from inside the Main method in Program.

Full source code here. This is a alternative to the approach described in a previous post. On a slack channel there was some discussion around the use of a little known extension method on HttpClientBuilder, ConfigureHttpClient.

Full source code here. There are some subtle issues in the way I use DI in this post, see here for an alternative if you don’t want to follow this approach

Full source code here. Want to learn more about Polly? Check out my Pluralsight course on it. Polly allows you to cache a response for reuse by a subsequent request, it supports both local an distributed caches, full information can be found here https://github.