52-Nodejs Course 2023: Events: Http Events

So we saw in our previous article how to use the events in the database. Now we will see how to use the events in the request.

Request Events

Requests will have many events actually, let's see it.

• validation: Validation has also multiple events, let's see them:
  • validation.validating: This event is fired when the validation is started.
  • validation.pass: This event is fired when the validation is successful.
  • validation.failed: This event is fired when the validation is failed.
  • validation.done: This event is fired when the validation is done either successful or failed.
• request: Requests events list
  • request.executingMiddleware: This event is fired before executing all the middlewares.
  • request.executedMiddleware: This event is fired after executing all the middlewares.
  • request.executingAction: This event is fired before the action is executed.
  • request.executedAction: This event is fired after the action is executed and before the response is sent.
• response: Response events list
  • response.sending: Fired when the response is about to be sent.
  • response.sent: Fired when the response has been sent.
  • response.success: Fired when the response has been sent and the status code is 2xx.
  • response.successCreate: Fired when the response has been sent and the status code is 201.
  • response.badRequest: Fired when the response has been sent and the status code is 400.
  • response.unauthorized: Fired when the response has been sent and the status code is 401.
  • response.throttled: Fired when the response has been sent and the status code is 429, which means the request has been throttled.
  • response.forbidden: Fired when the response has been sent and the status code is 403.
  • response.notFound: Fired when the response has been sent and the status code is 404.
  • response.serverError: Fired when the response has been sent and the status code is 500.
  • response.error: Fired when the response has been sent and the status code is 4xx or 5xx.

Too Many Events? Yes, but it's very useful. Let's see how to use them.

So we have here mainly three types of events:

• validation: This series of events is by the Validator class.
• request: This series of events is by the Request class.
• response: This series of events is by the Response class.

Each one of them has a different set of events, based on the situation of the event we'll start handle the event trigger.

🎨 Conclusion

We just introduced our Http Events types that will be used in our project, in our next article we'll start implementing first the validation events.

🚀 Project Repository

You can find the latest updates of this project on Github

😍 Join our community

Join our community on Discord to get help and support (Node Js 2023 Channel).

🎞️ Video Course (Arabic Voice)

If you want to learn this course in video format, you can find it on Youtube, the course is in Arabic language.

💰 Bonus Content 💰

You may have a look at these articles, it will definitely boost your knowledge and productivity.

General Topics

• Event Driven Architecture: A Practical Guide in Javascript
• Best Practices For Case Styles: Camel, Pascal, Snake, and Kebab Case In Node And Javascript
• After 6 years of practicing MongoDB, Here are my thoughts on MongoDB vs MySQL

Packages & Libraries

• Collections: Your ultimate Javascript Arrays Manager
• Supportive Is: an elegant utility to check types of values in JavaScript
• Localization: An agnostic i18n package to manage localization in your project

React Js Packages

• useFetcher: easiest way to fetch data in React Js

Courses (Articles)

• React Js: Let"s Create File Manager With React Js and Node Js