¿Qué es el contexto HTTP expreso?

What is Express HTTP context?

Get and set request-scoped context anywhere. This is just an unopinionated, idiomatic ExpressJS implementation of cls-hooked (forked from continuation-local-storage). It’s a great place to store user state, claims from a JWT, request/correlation IDs, and any other request-scoped data.

Express Overview Allows to set up middlewares to respond to HTTP Requests. Defines a routing table which is used to perform different actions based on HTTP Method and URL. Allows to dynamically render HTML Pages based on passing arguments to templates.

Node. js has a built-in module called HTTP, which allows Node. js to transfer data over the Hyper Text Transfer Protocol (HTTP).

Using this connection, data sending and receiving can be done as long as connections use a hypertext transfer protocol. Example: Creating a server using the HTTP module in NodeJS….Difference between HTTP module and Express.js module:

This module provides Express middleware for validating JWTs (JSON Web Tokens) through the jsonwebtoken module. The decoded JWT payload is available on the request object.

The request context keeps track of the request-level data during a request. Rather than passing the request object to each function that runs during a request, the request and session proxies are accessed instead. A corresponding application context is pushed when a request context is pushed. …

Node. js is a server-side JavaScript run-time environment. It’s open-source, including Google’s V8 engine, libuv for cross-platform compatibility, and a core library.

JWT provides a JSON Web Token (JWT) authentication middleware. For valid token, it sets the user in context and calls next handler. For invalid token, it sends “401 – Unauthorized” response.

Express is a minimal and flexible Node.js web application framework that provides a robust set of features to develop web and mobile applications. It facilitates the rapid development of Node based Web applications. Allows to set up middlewares to respond to HTTP Requests.

Get and set request-scoped context anywhere. This is just an unopinionated, idiomatic ExpressJS implementation of cls-hooked (forked from continuation-local-storage ). It’s a great place to store user state, claims from a JWT, request/correlation IDs, and any other request-scoped data. Context is preserved even over async/await (in node 8+).

Request Object − The request object represents the HTTP request and has properties for the request query string, parameters, body, HTTP headers, and so on. Response Object − The response object represents the HTTP response that an Express app sends when it gets an HTTP request.

Get them from code that doesn’t have access to the express req object: You can access cls namespace directly as (it may be useful if you want to apply some patch to it, for example https://github.com/TimBeyer/cls-bluebird ): Make sure you require express-http-context in the first row of your app.