This article will explain how to run your arbitrary SQL commands against a Postgre SQL database running in a Docker container in Windows. That should be super simple, but since I never remember anything like this by heart, I had to google it – and turns out, either I didn’t know how to google this properly or people haven’t bothered to document this. So, let’s fix that. But first, why did I need to do this, again? Problem So – I meant to run some…Continue reading How to run SQL commands in a Postgre SQL Docker container?
Recently, I needed to host a web-based thingamajiggy in WordPress and needed to include a couple of custom libraries. For the sake of quick iteration, I decided to use a public FTP folder that I already had on the same server in order to host this. So I had configured a subdomain to host the files, and wanted to reference them from my WordPress site. Not quite a CDN, but something a little bit like that. Well, of course, I ran into an issue again.…Continue reading How to modify CORS settings using a .htaccess file
This was another (luckily pretty shallow) rabbit hole down some corporate IT and weird default configurations by our favorite tech-daddy Microsoft. In the article, I will describe one possible reason for a process called Vmmem.exe consuming enough RAM to crash pretty much everything else running on your machine. But let’s take a step back first – what happened? Problem I was developing some Azure IoT Edge modules (as one does), when my dev laptop was starting to feel a bit sluggish. That’s nothing out of…Continue reading How to solve Vmmem consuming ungodly amounts of RAM when running Docker on WSL?
Well, it’s been a year. It certainly does not feel like it has been a whole 12 months since I last wrote one of these, you know? I failed every single one of the goals I set for 2021, but I’m not going to lie, family takes (and deserves) so much time that it is no wonder that our hobbies suffer a bit. But still – writing these year reviews has become a tradition, so without further ado – let’s get to it! 😁 Website…Continue reading 2021 – Year Review!
One more article before Christmas! 😁 This time, I’ll be fixing a function that’s triggering based on new messages received through my IoT Hub in my Azure Functions project. Technically speaking, this is super simple to implement – your function needs to define an IoTHubTrigger, with an Event Hub name and usually a Connection String (I don’t know why I’m Sentence Casing that, too, but I’ll stick to it!) You can tap a practically unlimited number of Azure Function triggers to any Event Hubs (or…Continue reading How to fix “Microsoft.WindowsAzure.Storage: Server encountered an internal error. Please try again after some time.” when using IoTHub trigger for Azure Functions?
Another one in the series of “this should’ve been easy, but alas, you’re the edge case”. “You” being “me”, and the “edge case” being our internal npm feed (registry), for whatever reason. Ah, well – life would be extremely boring if everything always went according to documentation, right? So, instead of the built-in ways to access npm feeds, this solution includes some PowerShell. Ah – that’s when you know it’s going to be good, right? When someone goes as far as to throw away the…Continue reading How to authenticate against npm registries in Azure DevOps?
So a while back I posted about testing your “vanilla” WebSockets connection directly in the browser – and while that’s nice and easy, sometimes you need to class up a bit. In my case that meant upgrading to SignalR (for some corporate and enterprisey reasons as usual). It makes sense to leave behind the easy, simple, lightweight and somewhat transparent WebSockets to “upgrade” to the enterprise-ready (and arguably quite a lot less transparent) SignalR? Well – I went through that, and since I needed to…Continue reading How to test SignalR-connection in the browser?
I tend to post a lot of articles about different gotchas and configuration tweaks, but this one goes back to the roots a bit – just me and a couple of other devs hacking some code together and being blocked by a bit of an obstacle, that’s then fixed by – you guessed it – writing niftier code. Or actually, I suppose it was more about removing some and adding some of the right stuff… But isn’t that what most programming is about? Anyway –…Continue reading How to access claims of a SignalR user in ASP.NET Core?
Another fun one with Azure Functions! At least it’s a simple one: this time, I ran into a weird issue while doing some code reusing – well, copy-pasting – between a couple of different projects. I was lovingly hand-crafting some Azure Functions, while suddenly the Azure Functions host would throw this in ugly red letters: Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: ‘Microsoft.AspNetCore.Mvc.Core, Version=184.108.40.206, Culture=neutral, PublicKeyToken=adb9793829ddae60’ at Mono.Cecil.BaseAssemblyResolver.Resolve(AssemblyNameReference name, ReaderParameters parameters) at Mono.Cecil.BaseAssemblyResolver.Resolve(AssemblyNameReference name) at Mono.Cecil.DefaultAssemblyResolver.Resolve(AssemblyNameReference name) at Mono.Cecil.MetadataResolver.Resolve(TypeReference type) at Mono.Cecil.ModuleDefinition.Resolve(TypeReference type) at Mono.Cecil.TypeReference.Resolve() at MakeFunctionJson.AttributeExtensions.IsWebJobsAttribute(CustomAttribute…Continue reading Azure Function build fails with “Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: Microsoft.AspNetCore.Mvc.Core”
So, a while ago I posted about a fairly simple way to write your code for fetching secrets (and other confidential stuff) from Azure Key Vault in such a way, that it would work the same way both in Azure and on your local dev box. I find this pretty important, as it reduces the need for weird workarounds and fallbacks in your code, and at the same time enables you to harness the Azure Key Vault for that sweet spot of “good enough security…Continue reading How to update from deprecated Microsoft.Azure.Services.AppAuthentication to new and shiny Azure.Security.KeyVaults.Secrets?
Let’s make this short and sweet. In this particular case, upgrading a Blazor WASM solution to .NET 6 broke the authentication when deployed to Azure. The same issue could probably happen to a fresh project, though. This is what you’re running into: If you open your browser console, you’ll see 2 interesting errors – first: dotnet.6.0.0.o2we6pverp.js:1 mono_wasm_runtime_ready login.microsoftonline.com/common/oauth2/v2.0/token:1 Failed to load resource: the server responded with a status of 400 (Bad Request) And a moment later, an error along the lines of: blazor.webassembly.js:1 crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer…Continue reading Fixing Blazor WebAssembly .NET 6 MSAL authorization bug
Ah – this was a fun one. I needed to figure out how to purge, flush and clear your commit history on GitHub. Turns out it isn’t as easy as clicking a button in the web user interface – the world is apparently not ready yet! 😁 Luckily, it wasn’t that complicated either – and the steps should work for other flavors of git as well. Background Always remember to .gitignore your secrets, folks! And if you forget, pray you’re not committing to a public…Continue reading How to nuke your Git(Hub) commit history?
This article explains how to fix an issue where your Azure Functions function (yes, that’s a capital F and a lowercase f to denote the difference between the product and the piece of compute) fails to fire when a POST request comes in, even though it’s configured to do so, and instead throws a somewhat confusing error message about HttpRequestMessage not being castable to HttpRequest – even though you KNOW HttpRequestMessage works just fine for receiving POST requests with payload! So, why is this happening…Continue reading How to fix “Unable to cast object of type ‘System.Net.Http.HttpRequestMessage’ to type ‘Microsoft.AspNetCore.Http.HttpRequest’.”
Azure Key Vault is great. But when developing locally, it can be a bit of a pain. You can always circumvent it and create some classical solution, such as simply wrapping all of your key/secret assignments in if-else-clauses that will use local configuration if you’re running locally and only call the Azure Key Vault if you’re in the cloud… But that feels so incredibly early-2000-ish. Isn’t there a better option available? I mean – obviously, there is! And we’ll see how it works in just…Continue reading How to authenticate against Azure Key Vault both in Azure and local development environment?
This article explains how to fix an annoying issue with Microsoft’s SDK for CosmosDb v3 – it comes with a Newtonsoft.Json dependency, that most of Microsoft’s recent packages have let go of. With .NET Core 3.1 having shipped with System.Text.Json included, and (mostly) replacing Newtonsoft.Json, it’s kind of the preferred option. However, CosmosDb v3 SDK doesn’t support it and by default requires you to use Newtonsoft.Json to override the property names, if you want to – for example – map entities with PascalCase naming with…Continue reading System.Text.Json.JsonPropertyName not working for CosmosDb in .NET Core/5?
Man, do I run into all kinds of issues with the smallest Azure Functions that I develop. And it’s mostly my fault. The silver lining is that you’re here to read this article, so you probably ran into this same stuff. Well – you should be happy to hear that this article describes fixes to a couple of issues – let’s see if they help you out as well! The article probably largely applies to any situation where you have a project referencing another project…Continue reading Errors loading an assembly that’s using Microsoft Graph API
This article explains another fun issue that you might run into when developing Azure Functions in your local environment. It was weird how unclear the few results were that I could find. And the issue is just… very hazy in general. But I was able to track the issue down, and thought I’d document the solution :) It’s for myself, really, because I’m pretty sure I’ll run into this one again. But if you find it useful, good for you! 😉 Problem So what is…Continue reading ILogger binding suddenly failing for Azure Functions – what to do?
Another day, another issue. This time, I was absent-mindedly following the guidance for a project on how to generate .sql files for .NET EF Core code-first migrations. Don’t ask why that was required, but it was. My migration was simple. Adding an entity with just a few properties. And Entity Framework created my programmatic migration just fine. But when generating the SQL file, I got nothing but an empty file. No matter what my startup project was, – working directory, context, target folder, or other…Continue reading “dotnet ef script” or “Script-Migration” producing empty .sql files?
Another day, another issue – this time with an on-premises environment with a ridiculously complicated architecture and an absolute ton of pipelines. There are plenty of ways to fix this particular issue (because there are plenty of reasons), and after ferocious googling (and a very brief binging just to see if Microsoft had found something Google hadn’t), the trail ran cold and I felt like nobody had run into the same issue before. This is probably not true – just that the documentation wasn’t there.…Continue reading How to fix a 403.18 in a virtual application?
Another day, another thing that I am trying to do on GitHub (and partially failing), and another blog post! This time I was configuring a build and ran into trouble. This article describes one possible fix to an issue where an error is thrown along the lines of “The GITHUB_TOKEN environment variable was not set”. As a backstory: I have a long history with Azure DevOps, and have maintained a kind of a love-hate -relationship (that maybe gravitates slightly more on the rosy side of…Continue reading GitHub Action fails with “The GITHUB_TOKEN environment variable was not set”