How to: Author middleware components

    Dapr allows custom processing pipelines to be defined by chaining a series of middleware components. In this guide, you’ll learn how to create a middleware component. To learn how to configure an existing middleware component, see Configure middleware components

    Your middleware needs to implement a middleware interface, which defines a GetHandler method that returns a http.Handler callback and an error:

    Your handler implementation can include an inbound logic, outbound logic, or both:

    2. func (m *customMiddleware) GetHandler(metadata middleware.Metadata) (func(next http.Handler) http.Handler, error) {
    3.   var err error
    4.   return func(next http.Handler) http.Handler {
    5.       // Inbound logic
    6.       // ...
    8.       // Call the next handler
    11.       // ...
    12.     }
    14. }