Build a small express application that keeps in memory a "message" which is a string value — initially, this message is an empty string. The application, when running, should answer to the following HTTP requests:
POST /message— sets the value of the message, using JSON dataGET /message— gets the current value of the message returned inside JSON data
To complete this exercise, you'll need to:
- Declare express routes
- Use the
express.json()middleware to read JSON request data
Run node index.js to start the application
You can use curl in a separate terminal tab with the following commands to check the expected result (assuming your app is running on the port 3000):
$ curl -XGET http://localhost:3000/message
{ "message": "" }
$ curl -XPOST http://localhost:3000/message -H 'content-type: application/json' -d '{ "message": "Hello, Makers" }'
$ curl -XGET http://localhost:3000/message
{ "message": "Hello, Makers" }
$ curl -XPOST http://localhost:3000/message -H 'content-type: application/json' -d '{ "message": "Good bye!" }'
$ curl -XGET http://localhost:3000/message
{ "message": "Good bye!" }
Build a small express application that keeps in memory a counter which starts at 0. The application, when running, should answer to the following HTTP requests:
POST /counter— increment the counter by 1.GET /counter— gets the value of the counterDELETE /counter— resets the value of the counter to 0.
You can use curl with the following commands to check the expected result (assuming your app is running on the port 3000):
$ curl -XGET http://localhost:3000/counter
{ "counter": 0 }
$ curl -XPOST http://localhost:3000/counter
$ curl -XPOST http://localhost:3000/counter
$ curl -XGET http://localhost:3000/counter
{ "counter": 2 }
$ curl -XDELETE http://localhost:3000/counter
$ curl -XGET http://localhost:3000/counter
{ "counter": 0 }