Why middleware in ASP.NET Core requires specific semantics, but not an interface?

The Invoke method is flexible and you can ask for additional parameters. ASP.NET will inject the additional parameters using the application’s service configuration. public async Task Invoke(HttpContext ctx, IHostingEnvironment host, ISomethingElse service) { // … } C# interface definitions can’t provide this flexibility in a nice way.

Migrating from OWIN to ASP.NET Core

Middleware is quite similar between Katana and Core but you use HttpContext instead of IOwinContext. Startup.cs is similar but there’s much more DI support. WebApi has been merged into MVC DelegatingHandler is gone, use middleware instead. HttpConfiguration has been split up into Routing and MvcOptions. Also https://devblogs.microsoft.com/aspnet/katana-asp-net-5-and-bridging-the-gap/

Rewind request body stream

Just found one solution. Replacing the original stream with a new stream containing the data. public override async Task Invoke(IOwinContext context) { return Task.Run(() => { string body = new StreamReader(context.Request.Body).ReadToEnd(); // log body byte[] requestData = Encoding.UTF8.GetBytes(body); context.Request.Body = new MemoryStream(requestData); await this.Next.Invoke(context); }); } If you are dealing with larger amounts of data, … Read more

Web API 2 OWIN Bearer Token purpose of cookie?

In the SPA template there are actually two separate authentication mechanisms enabled- cookie authentication and token authentication. This enables authentication of both MVC and Web API controller actions, but requires some additional setup. If you look in the WebApiConfig.Register method you’ll see this line of code: config.SuppressDefaultHostAuthentication(); That tells Web API to ignore cookie authentication, … Read more

How to fix “IDX20804: Unable to retrieve document from: ‘[PII is hidden]'” error in C#

First, to solve this issue, you need to find out what the error is. Set this in your Startup.cs to reveal the real error (not recommended for a production environment): if (env.IsDevelopment()) { IdentityModelEventSource.ShowPII = true; } In my case, I had a proxy issue running it locally inside the corporate network.

How to get IIS to recognize OWIN startup class?

Make sure your app pool is in v4.0 integrated mode. Make sure you have bin placed Microsoft.Owin.Host.SystemWeb (I see you have installed it) – Just make sure its also in the bin folder. This article will have more information on how an OWIN middleware runs on Integrated pipeline.

OWIN Authentication Pipeline To Use Katana Middleware Correctly?

As @Tratcher said, the AuthenticationType parameter is used by Microsoft.Owin.Security as a key to do lookups of authentication middleware instances. The code below will use the following simple helper method to require that all requests are authenticated. In practice you’re more likely to use an [Authorize] attribute on sensitive controllers, but I wanted an example … Read more

Is there Application_End from Global.asax in Owin?

AppProperties, found in Microsoft.Owin.BuilderProperties, exposes the CancellationToken for OnAppDisposing. You can get this token and register a callback to it public class Startup { public void Configuration(IAppBuilder app) { var properties = new AppProperties(app.Properties); CancellationToken token = properties.OnAppDisposing; if (token != CancellationToken.None) { token.Register(() => { // do stuff }); } } }

No owin.Environment item was found in the context

Most likely it cannot find the OWIN Startup class. The default convention for the Startup class is [AssemblyName].Startup. If you’re no longer following that convention you’ll need to specify the full name of your Startup class in the Web.Config. The next release of Microsoft.Owin.Host.SystemWeb package now throws detailed exception messages when the Startup class cannot … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)