🚀 Redis Client in C++ (RESP2 Protocol)

A lightweight Redis client written in C++ that communicates with the official Redis server using the RESP2 (Redis Serialization Protocol).
This project demonstrates low-level socket programming, command parsing, and protocol implementation.

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📌 Features

✅ Connects to official Redis server using TCP sockets
✅ Implements RESP2 protocol for communication
✅ Command parsing using Regex
✅ Handles server responses dynamically
✅ Automated build using Makefile
✅ Interactive CLI for sending Redis commands

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🏗️ Project Architecture

The client follows a structured workflow:

User Input ↓ Command Handler ↓ Build RESP Command ↓ Send Command via Socket ↓ Response Handler ↓ Display Output

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⚙️ How It Works

1️⃣ Socket Connection

• Creates a TCP socket.
• Connects to the Redis server using IP and port.
• Establishes communication channel.

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2️⃣ Command Handler

• Takes input commands from user.
• Uses Regex library to validate and parse commands.
• Converts command into structured tokens.

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3️⃣ RESP Command Builder

• Converts user command into RESP2 format.
• Example conversion:

User Input

SET key value

RESP Format

*3 $3 SET $3 key $5 value

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4️⃣ Command Sender

• Sends formatted RESP command to Redis server through socket.

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5️⃣ Response Handler

• Reads Redis server response.
• Parses different RESP response types:
  • Simple Strings
  • Errors
  • Integers
  • Bulk Strings
  • Arrays

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6️⃣ Output Display

• Converts server response into readable output for user.

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🛠️ Tech Stack

• C++
• Socket Programming (POSIX)
• Regex Library
• RESP2 Protocol
• Makefile

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