Middleware

Q: How deeply does Learn Docker in a Month of Lunches, Second Edition cover middleware?

Defines path, header, and authentication uses, then demonstrates path-prefix rewriting without detailing middleware labels.

As explained in Learn Docker in a Month of Lunches, Second Edition

A Traefik middleware is a request-processing component that modifies or validates traffic before forwarding it to a service.

A Traefik middleware changes or checks an HTTP request after a router matches it and before Traefik forwards it to the service. It can rewrite paths, modify headers, or enforce authentication. section 20.4

Use middleware when a routed request needs an adjustment before reaching its upstream container:

Strip an API path prefix when the application expects the path without that prefix. section 20.4
Change request headers or enforce authentication before forwarding traffic. section 20.4

Expose an API beneath a shared domain

Route requests for the image gallery domain with an /api prefix, then use middleware to remove that prefix before forwarding the request to the API service. Verify both the website and API with curl. section 20.4

How Learn Docker in a Month of Lunches, Second Edition covers it

Cover of Learn Docker in a Month of Lunches, Second Edition

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Also explained in

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ASP.NET Core in Action, 3eMiddleware is a request-processing component that can inspect, modify, or handle HTTP requests and responses within an ASP.NET Core pipeline.
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Pro ASP.NET Core 7, Tenth EditionMiddleware is a component in an ASP.NET Core request pipeline that processes HTTP requests and responses.
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Go by ExampleMiddleware is a software pattern in which a component wraps a handler or processing component to add behavior before, after, or around the wrapped component's execution.
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Building Web APIs with ASP.NET CoreMiddleware is an HTTP-level component that processes a request and either passes it to the next pipeline component or produces a response.
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Django in ActionMiddleware is software that sits in a request-processing pipeline and can modify processing or prevent a downstream handler from being called.
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Secure APIsMiddleware is software that intercepts and processes requests or responses between a client and an application endpoint.
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Build AI-Enhanced Web AppsMiddleware is software that intercepts and processes requests between a client and an application handler.
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Learn Haskell by ExampleMiddleware is a function or component that wraps a web application to inspect or transform requests and responses before delegating to the wrapped application.
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Build Financial Software with Generative AI (From Scratch)Middleware is software that intercepts and processes requests or responses between an application and its surrounding interfaces.

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Related concepts

terminal middlewareincludes · Terminal middleware is a request-pipeline component that handles a request and returns a response without invoking subsequent components.
RequestDelegateuses · RequestDelegate is an ASP.NET Core delegate representing an asynchronous function that accepts an HttpContext and processes an HTTP request.
staticfilemiddlewareincludes · Static file middleware is an ASP.NET Core middleware component that serves existing files from configured locations in response to matching requests.
HttpContextuses · HttpContext is the ASP.NET Core object representing the information, state, and features associated with a single HTTP request and its response.
Useused by · Use is an ASP.NET Core extension method that adds inline middleware to an application's HTTP request-processing pipeline.

This explainer was generated by Manning's knowledge graph from the text of Learn Docker in a Month of Lunches, Second Edition. The section links point to the parts of the book it draws on.