I have a Cannon MG2580s printer, it can print 4x6 inch (10x15cm) A6 size photos, but with ugly white borders even the printing software is set to borderless. This is because this model of printer does not support borderless printing on hardware level, it's not a software or settings issue. I've come up with a workaround that can produce borderless photo printing. …
I am recently working on a project that requires front-end to call Azure REST APIs. Microsoft document describes how to get Access Token in postman via Jon Gallant's blog post. However, placing secret keys in front-end is very dangerous. In my project, I have to get the Access Token from server side in .NET. Let's see how to do it. …
Azure Application Insights is a very powerful APM tool for monitoring web applications. However, not all features that we sometimes require come out of the box. I now have an ASP.NET Core Web API application that uses JWT authentication. I would like to log user's identity when there is a failed request. Let's see how to do it. …
Recently I am working on an internal OA system for a small company. One of their business requirement is for the users to upload attachments when creating a ticket. Azure Blob Storage is ideal for this scenario. However, the attachments are sized from a few KB to hundreds of MB, so it is necessary to show a progress bar when user upload the files. Let's see how can we easily do it with Azure. …
For websites that need to display different content for users in different countries and regions, we usually identify the user's location based on the IP address. It means we have to write our own code, purchasing and maintaining an IP database, or using a third-party IP data service, it will take huge efforts. How to quickly do it without purchasing an IP database and write a lot of code? …
When I choose free static website hosting plans, I would use GitHub pages in the past. But now, since the GA of Azure Static Web Apps (SWA), I now have another free of charge option. I've tried to host a few pure HTML/JS website as well as .NET Blazor WASM applications with Azure Static Web Apps. In this post, I'll share how to create a static website by SWA. …
In ASP.NET Core unit tests, if you want to mock HttpClient.GetStringAsync(), here's the trick. Problem Given the following code var html = await _httpClient.GetStringAsync(sourceUrl); When I tried to mock HttpClient.GetStringAsync() like this var httpClientMock = new Mock<HttpClient>(); httpClientMock .Setup(p => p.GetStringAsync(It.IsAny<string>())) .Returns(Task.FromResult("...")); Moq …
In my previous posts, I have introduced usage of Azure Front Door. However, when we finish setting up the front door and bind our domain to the front door, users can still access the App Service URL. In this post, I'll introduce how to prevent access to our App Service when using Azure Front Door. Problem For example, my blog is binding https://edi.wang to my front door, I have 2 App Services …
In ASP.NET Core unit tests, if you want to mock HttpContext.Features.Get<SomeType>(), here's the trick. Problem I have my Error page code that will get exception detail infomation, to do that, I use HttpContext.Features.Get<IExceptionHandlerPathFeature>(). public void OnGet() { var requestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier; var exceptionFeature = HttpContext.Features. …
Problem In ASP.NET Core, when you use extension methods on UrlHelperExtensions class, it would be difficult to write Mock in unit test. Because Moq doesn't support mocking extension methods. For example, the following code that I use in my blog is using Url.Page() method: var callbackUrl = Url.Page("/Index", null, null, Request.Scheme); But in my unit test, mocking like this will throw …