A Simple Web Server responding to GET requests

I built a web server with Node.js/Express on top of AWS EC2.
The application returns a response to the GET request from the client.
This project was part of Amazon Cloud Engineer Technical Test.

Available endpoints

• / returns AMAZON if request was successful (Below is a sample IP address)

  • run $ curl "http://1.2.3.4/"

• /secret validates basic authentiation with { login: 'amazon', password: 'candidate' }

  • running $ curl -u amazon:candidate "http://1.2.3.4/secret/", returns SUCCESS
  • running $ curl "http://1.2.3.4/secret/", returns authentication fail message

• /calc

  • running $ curl 'http://1.2.3.4/calc?1+2*3', returns 7
  • running $ curl 'http://1.2.3.4/calc?2-1', returns 1
  • running $ curl 'http://1.2.3.4/calc?3*2', returns 6

• /stocker
  

  • running below returns xxx: 96
    

  $ curl "http://1.2.3.4:8080/stocker?function=deleteall"
  $ curl "http://1.2.3.4:8080/stocker?function=addstock&name=xxx&amount=100"
  $ curl "http://1.2.3.4:8080/stocker?function=sell&name=xxx&amount=4" 
  $ curl "http://1.2.3.4:8080/stocker?function=checkstock&name=xxx"
  

  • running below returns xxx: 96 yyy: 100 YYY: 100

  $ curl "http://1.2.3.4:8080/stocker?function=addstock&name=yyy&amount=100"
  $ curl "http://1.2.3.4:8080/stocker?function=addstock&name=YYY&amount=100"
  $ curl "http://1.2.3.4:8080/stocker?function=checkstock"
  

Below are the functions implemented for /stocker
(1) Addition of inventory

• argument:
  • function (required): addstock
  • name (required): Specify the name of the target product.
  • amount (arbitrary): Specify the number (positive integer) to add the target product to the inventory. The default is 1.
• Output: None

(2) Inventory check

• argument:
  • function (required): checkstock
  • name (optional): Specify the name of the target product.
• Output:
  • If a name is specified, the number of items in stock with that name is output in the "[name]: [amount]" format. When there is no stock, amount is displayed as 0.
  • When name is not specified, the number of stocks of all products is sorted in ascending order with name as a key and output. Items with 0 inventory are not displayed.
• Example output:
  • xxx: 12
  • yyy: 7

(3) Sales

• argument:

  • function (required): sell
  • name (required): Specify the name of the target product.
  • amount (arbitrary): Specify the number (a positive integer) of the target product sold. The default is 1.
  • price (optional): Specify the price of the target product (a number greater than 0). Only when input, add price x amount to sales.

• Output: None

(4) Sales check

• argument:

  • function (required): checksales

  • Output: Displays the current sales in the format "sales: [sales]". For decimal numbers, round up to the second decimal place.

• Example output:
  • sales: 400

(5) Delete all

• argument:

  • function (required): deleteall

• Output: None

A Learning Experience

It was my first time connecting to a remote computer through SSH.
I learned how to use vim, and play around with requests and responses over HTTP.

Development

• Please replace the IP address on app.js, with your IP address to run on localhost.
  
• run node app.js to start the web server