Stock Price Checker

A full stack JavaScript app for checking real-time stock prices and tracking likes per stock, built for the freeCodeCamp Information Security curriculum.

Features

• View real-time stock prices using the freeCodeCamp Stock Price Proxy API
• Like a stock (one like per IP, anonymized for privacy)
• Compare two stocks and see the relative difference in likes
• Security features including strict Content Security Policy

Usage

Installation

1. Clone this repository:

   git clone https://github.com/sabbas-ctrl/Stock-Price-Checker.git
   cd Stock-Price-Checker
   

2. Install dependencies:

   npm install
   

Running Locally

Start the server:

npm run dev

Visit http://localhost:3000/ in your browser.

API Endpoints

GET /api/stock-prices

Query Parameters:

• stock (string or array): NASDAQ stock symbol(s) (e.g., GOOG or ['GOOG','MSFT'])
• like (boolean, optional): Set to true to like the stock(s)

Examples:

• /api/stock-prices?stock=GOOG
• /api/stock-prices?stock=GOOG&like=true
• /api/stock-prices?stock=GOOG&stock=MSFT
• /api/stock-prices?stock=GOOG&stock=MSFT&like=true

Response:

• For one stock:

  {
    "stockData": {
      "stock": "GOOG",
      "price": 1234.56,
      "likes": 5
    }
  }

• For two stocks:

  {
    "stockData": [
      {
        "stock": "GOOG",
        "price": 1234.56,
        "rel_likes": 1
      },
      {
        "stock": "MSFT",
        "price": 234.56,
        "rel_likes": -1
      }
    ]
  }

Security

• Content Security Policy restricts scripts and CSS to your server only.
• IP addresses are anonymized before storing likes, in compliance with privacy laws.

Testing

Run all tests:

npm test

Functional tests are located in tests/2_functional-tests.js.

License

MIT