Posted on Sep 28 INTRODUCTION:Middleware in Web Development refers to a set of functions or processes that are executed between receiving an HTTP request and sending an HTTP response in a web application. Middlewares act as intermediaries that can perform various tasks such as request processing, authentication, authorization, logging, error handling, and more. They are an integral part of many web frameworks and are used to enhance the functionality and security of web applications.Here is an introduction to middlewares in web development:Request-Response Flow:Middleware Chain:Common Uses of Middlewares:Authentication: Middleware can check whether a user is authenticated before allowing access to protected routes. It can validate user credentials, tokens, or session data.Authorization: Middleware can verify whether the authenticated user has the necessary permissions to access certain resources or perform specific actions.Validation: Middleware can validate incoming data, such as form submissions or API payloads, to ensure it meets certain criteria or constraints.Error Handling: Middleware can catch and handle errors that occur during request processing. It can send appropriate error responses to the client.CORS (Cross-Origin Resource Sharing): Middleware can handle CORS headers to control which domains are allowed to access resources on the server.Compression: Middleware can compress response data to reduce bandwidth usage and improve page load times.Session Management: Middleware can manage user sessions, maintaining user-specific data between requests.Custom Middlewares:Middleware Execution Order:In summary, middlewares play a crucial role in web development by enabling developers to add functionality and logic to the request-response cycle of web applications. They provide a way to modularize and enhance the behavior of web servers, making it easier to implement features like authentication, authorization, and error handling while keeping the codebase clean and maintainable.__"Why did the developer start using middlewares? Because they realized that even in the 'middle' of challenges, they could 'ware' their coding skills and conquer anything!" 😄🚀-Jemarie B.Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well Confirm For further actions, you may consider blocking this person and/or reporting abuse Shan Shah - Sep 13 Kartik Budhraja - Sep 22 Riccardo Tartaglia - Sep 24 Mafuzur Rahman - Sep 22 Once suspended, oxyjem will not be able to comment or publish posts until their suspension is removed. Once unsuspended, oxyjem will be able to comment and publish posts again. Once unpublished, all posts by oxyjem will become hidden and only accessible to themselves. If oxyjem is not suspended, they can still re-publish their posts from their dashboard. Note: Once unpublished, this post will become invisible to the public and only accessible to Jemarie Baldespiñosa. They can still re-publish the post if they are not suspended. Thanks for keeping DEV Community safe. Here is what you can do to flag oxyjem: oxyjem consistently posts content that violates DEV Community's code of conduct because it is harassing, offensive or spammy. Unflagging oxyjem will restore default visibility to their posts. DEV Community — A constructive and inclusive social network for software developers. With you every step of your journey. Built on Forem — the open source software that powers DEV and other inclusive communities.Made with love and Ruby on Rails. DEV Community © 2016 - 2023. We're a place where coders share, stay up-to-date and grow their careers.