Pass data to middleware further down the chain

Question

When I register middleware as part of the request pipeline, how do I pass data through the middleware chain. (ultimately accessible in an MVC controller action)

For exam

Answer 1

You can use the HttpContext.Items collection to store data for the lifetime of a request. Its primary use-case is passing data around components (middleware and controllers for example). Adding and reading items is easy:

Write:

context.Items["AuthData"] = authData;

Read:

var authData = (AuthData)context.Items["AuthData"];

See the ASP.NET docs for more info.