ahmedmaher2481998/practice-for-week-10-predict-order-of-express-middleware

Predict the order of Express middleware

In this practice, you will predict the order that Express middleware will be invoked when making a variety of requests.

Background

Take a look at the server/app.js file. This file contains the Express application and the middlewares connected to the application.

Predictions

In each of the following scenarios, predict what will be logged in the server logs when a request is made.

You might find it helpful to grab some paper and sketch out a flow diagram for the middlewares in server/app.js.

Write down your predictions for each of the following scenarios.

Scenario #1 GET /

If a client makes a request to GET /, what will be logged in the server logs and in what order?

Scenario #2 GET /other-resource

If a client makes a request to GET /other-resource, what will be logged in the server logs and in what order?

Scenario #3 GET /not-found

If a client makes a request to GET /not-found, what will be logged in the server logs and in what order?

Verify your predictions

Now, it is time to run the application and use the browser or Postman to verify your predictions.

Set up

cd into the server folder.

npm install the dependencies.

Run npm start to start the server on localhost port 5000.

Testing

Request each of the urls. If your prediction matches, that's great! If not, that's ok. This is a skill that needs practice. Review your diagram and use your debugging skills to discover what happened. As needed, formulate good questions for your instructors.