A web server can be seen as a function that takes in a request and outputs a response. Middlewares are functions executed in the middle after . I spent one week to debug a problem, which made me interested in how expressjs middleware works. I spend some extra time to dig into the . One of the famous example is using body-parser . While not practical in a traditional .
In particular, this is a great pattern for handling authentication. Each route is defined via a method call on an . Among many others, middleware is an important concept to build any . In this post we will cover how we must use correctly async functions as express middleware. Passport is authentication middleware for Node. Every app utilizes a configurable . Move your Promise-based requests into asynchronous middleware.
A Koa application is an object containing an array of middleware functions . The configuration is just an object that defines an onconfig.
The error handler must be before any other error middleware app. We are going to create our first GraphQL server using express and pg. The idea is to have a GraphQL middleware that will handle all the requests and also it will verify.
