A minimal Redis CLI client written in C++17 from scratch — no third-party libraries, just raw Berkeley sockets and the RESP (Redis Serialization Protocol).

• Interactive REPL – Connect and send Redis commands in real-time, just like redis-cli.
• RESP Protocol – Fully implements RESP2 serialization & deserialization (simple strings, errors, integers, bulk strings, arrays).
• IPv4 / IPv6 – Automatically resolves and connects via either protocol using getaddrinfo.
• Quoted arguments – Supports quoted strings so you can SET "hello world" 42.
• Configurable host & port – Pass -h and -p flags or use the default 127.0.0.1:6379.
• Clean OOP design – Separated into focused, single-responsibility classes.

client/
├── include/
│   ├── CLI.h              # REPL loop & user interaction
│   ├── CommandHandler.h   # Input tokenizing & RESP formatting
│   ├── RedisClient.h      # TCP socket connection management
│   └── ResponseParser.h   # RESP response deserialization
├── src/
│   ├── main.cpp           # Entry point & argument parsing
│   ├── CLI.cpp
│   ├── CommandHandler.cpp
│   ├── RedisClient.cpp
│   └── ResponseParser.cpp
└── Makefile

• g++ with C++17 support
• make
• A running Redis server (e.g. redis-server)

cd client
make

The binary is output to client/bin/my_redis_cli.

# Default: connects to 127.0.0.1:6379
./bin/my_redis_cli

# Custom host & port
./bin/my_redis_cli -h 192.168.1.10 -p 6380

make clean     # Remove build artifacts
make rebuild   # Clean + rebuild

Once connected you get an interactive prompt:

127.0.0.1:6379> PING
PONG
127.0.0.1:6379> SET mykey "Hello World"
OK
127.0.0.1:6379> GET mykey
Hello World
127.0.0.1:6379> quit
Goodbye.

• Socket Programming – Creating and managing TCP connections with Berkeley sockets in C++.
• Protocol Implementation – Serializing commands and deserializing responses per the RESP2 spec.
• OOP Principles – Separation of concerns, single-responsibility classes, clean header/source split.
• CLI Development – Building an interactive terminal tool with argument parsing.

• One-shot command execution (./my_redis_cli PING)
• Pub/Sub support
• Command history & readline integration
• TLS/SSL connections
• Connection pooling & reconnection logic
• Pipeline & transaction support (MULTI/EXEC)

Contributions are welcome! Feel free to open an issue or submit a pull request.

1. Fork the repo
2. Create your branch (git checkout -b feature/awesome)
3. Commit your changes (git commit -m 'Add awesome feature')
4. Push to the branch (git push origin feature/awesome)
5. Open a Pull Request

This project is licensed under the MIT License.