Redis Protocol

Structs and functions for implementing the Redis protocol, built on nom and designed to work easily with Tokio.

Install

With cargo edit.

cargo add redis-protocol

Features

• Encode and decode with BytesMut or slices.
• Parse publish-subscribe messages.
• Support MOVED and ASK errors.
• Implements cluster key hashing.

Examples

extern crate redis_protocol;
extern crate bytes;

use redis_protocol::prelude::*;
use bytes::BytesMut;

fn main() {
  let frame = Frame::BulkString("foobar".into());
  let mut buf = BytesMut::new();
  
  let len = match encode_bytes(&mut buf, &frame) {
    Ok(l) => l,
    Err(e) => panic!("Error encoding frame: {:?}", e)
  };
  println!("Encoded {} bytes into buffer with contents {:?}", len, buf);
  
  let buf: BytesMut = "*3\r\n$3\r\nFoo\r\n$-1\r\n$3\r\nBar\r\n".into();
  let (frame, consumed) = match decode_bytes(&buf) {
    Ok((f, c)) => (f, c),
    Err(e) => panic!("Error parsing bytes: {:?}", e)
  };
  
  if let Some(frame) = frame {
    println!("Parsed frame {:?} and consumed {} bytes", frame, consumed);
  }else{
    println!("Incomplete frame, parsed {} bytes", consumed);
  }
  
  let key = "foobarbaz";
  println!("Hash slot for {}: {}", key, redis_keyslot(key));
}

See the encode and decode tests for more examples.

Tests

To run the unit tests:

cargo test