Session storage pattern in Redis - Mini Project: Build & Apply

Session Storage Pattern with Redis

📖 Scenario: You are building a simple web application that needs to remember user sessions. Each session stores a user's ID and login time. You will use Redis to save and retrieve these sessions efficiently.

🎯 Goal: Create a Redis session storage system that saves user sessions with a unique session ID, sets an expiration time, and retrieves session data.

📋 What You'll Learn

Create a Redis hash to store session data with keys 'user_id' and 'login_time'.

Set a session expiration time of 3600 seconds (1 hour).

Retrieve session data by session ID.

💡 Why This Matters

🌍 Real World

Web applications use session storage to remember users between page visits without needing to log in every time.

💼 Career

Understanding session storage in Redis is important for backend developers working on scalable web services and user authentication.

1

Create a session hash in Redis

Use the Redis command HSET to create a hash with the key session:12345 and fields user_id set to user_1 and login_time set to 2024-06-01T10:00:00Z.

Redis

# Use HSET to create session:12345 with user_id and login_time
# Your code here

Need a hint?

Use HSET followed by the session key and field-value pairs.

2

Set expiration time for the session

Use the Redis command EXPIRE to set the expiration time of 3600 seconds on the key session:12345.

Redis

HSET session:12345 user_id user_1 login_time 2024-06-01T10:00:00Z
# Use EXPIRE to set 3600 seconds expiration on session:12345
# Your code here

Need a hint?

Use EXPIRE followed by the key and the number of seconds.

3

Retrieve session data

Use the Redis command HGETALL to get all fields and values from the session hash with key session:12345.

Redis

HSET session:12345 user_id user_1 login_time 2024-06-01T10:00:00Z
EXPIRE session:12345 3600
# Use HGETALL to retrieve all session data for session:12345
# Your code here

Need a hint?

Use HGETALL with the session key to get all stored fields.

4

Complete session storage pattern

Combine the commands to create the session hash, set expiration, and retrieve session data for session:12345.

Redis

HSET session:12345 user_id user_1 login_time 2024-06-01T10:00:00Z
EXPIRE session:12345 3600
HGETALL session:12345
# Finalize the session storage commands
# Your code here

Need a hint?

Make sure all commands are included in order.