Node Week1 exercises

node-week1-exercises.md

Node Week 1 Exercises

Exercise 1

1. Extract the contents of the zip file into a new directory and open the folder in VSCode.
2. Initialise a new Node app in the directory. The entry point should be the existing server.js.
3. Install Express.
4. Create an Express app in server.js that listens on port 3000.
5. Create a new request in Postman to make sure that the server is working.

Exercise 2

1. Create a GET /profiles/eric endpoint that returns the data about Eric Cartman in JSON format.
2. Create a GET /profiles/eric/image endpoint that returns Eric's large profile picture.
3. Test the endpoints in a web browser.
4. Test the endpoints with Postman.

Exercise 3

Modify the GET /profiles/eric/image endpoint to accept a size query string parameter so that

• GET /profiles/eric/image?size=large should return Eric's large profile picture;
• GET /profiles/eric/image?size=small should return Eric's small profile picture;
• GET /profiles/eric/image (without the size parameter) should return Eric's large profile picture;
• for any other value of the size parameter the server should return 400 Bad Request status.

Exercise 4

Modify the request handlers so that they take the username as a route parameter. E.g.

• GET /profiles/kyle should return the data about Kyle Broflovski in JSON format;
• GET /profiles/kenny/image?size=small should return Kenneth McCormick's small profile picture;
• if the username doesn't exist the server shold return 404 Not Found status.

Exercise 5

1. Create a GET /profiles endpoint that returns the array of all profiles in JSON format.
2. Extend every student object with a property of the student's profile endpoint, one of the large profile picture and one of the small profile picture. E.g.

 {
   "username": "butters",
   "name": "Leopold Stotch",
   "age": 10,
   "school": "South Park Elementary",
   "grade": 4,
   "profile": "/profiles/butters",
   "largeImage": "/profiles/butters/image?size=large",
   "smallImage": "/profiles/butters/image?size=small"
 }