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#622 in Database interfaces
1,286 downloads per month
14KB
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redis_rawl is a minimal Redis client library implementation. It exposes a general purpose interface to Redis.
Forked from redis-raw git@github.com:aminroosta/redis-raw-rs.git
, got up-to-date and adjusted.
[dependencies]
redis_rawl = "v0.1.20240826"
Basic Operation
redis_rawl
exposes two API levels: a low- and a lower-level part!
The low-level
part does not expose all the functionality of redis and
might take some liberties in how it speaks the protocol. The lower-level
part of the API allows you to express any request on the redis level.
You can fluently switch between both API levels at any point.
Connection Handling
For connecting to redis you can use tokio::net::TcpStream
which can be
converted to (or from) RedisConnection
.
use redis_rawl::RedisConnection;
use tokio::net::TcpStream;
#[tokio::main]
async fn main() -> std::result::Result<(), Box<dyn std::error::Error>> {
// stablishes a TcpStream to redis
let stream = TcpStream::connect("127.0.0.1:6379").await?;
// RedisConnection can be converted to and from TcpStream
let mut con: RedisConnection = stream.into();
// we can use the same the lower level "command" fn
con.command::<()>("set key value".to_owned()).await?;
con.command::<i64>("append key !!!".to_owned()).await?;
let value = con.command::<String>("get key".to_owned()).await?;
assert_eq!(value, "value!!!");
for i in 1..3 {
con.command::<i64>(format!("zadd myset {} {}", i, i * i)).await?;
}
let myset = con.command::<Vec<String>>("zrange myset 0 -1".to_owned()).await?;
assert_eq!(myset, vec!["1", "4"]);
Ok(())
}
Executing Lower-Level Commands
To execute lower-level commands you can use the write()
and read()
functions
which allow you to make redis requests and parse redis (RESP) responses.
These functions correspond to the underlying socket's read and write operations.
The read()
function parses the RESP response as redis_rawl::Value
.
Value
Represents a redis RESP protcol response.
use redis_rawl::{RedisConnection, RedisResult, Value }
fn do_something(con: &mut RedisConnection) -> RedisResult<Value> {
con.write("set key vvv").await?
con.read().await
}
Executing Low-Level Commands
The low-level interface is similar. The command()
function does a
write()
and a read()
and converts the Value
into requested type.
use redis_rawl::{RedisConnection, RedisResult, Value }
fn do_something(con: &mut RedisConnection) -> RedisResult<String> {
con.command::<()>("set key value".to_owned()).await?;
con.command::<i64>("append key !!!".to_owned()).await?;
con.command::<String>("get key".to_owned()).await
}
Here is another example, to find out the correct result type see redis docs.
use redis_rawl::{RedisConnection, RedisResult, Value }
fn do_something(con: &mut RedisConnection) -> RedisResult<Vec<String>> {
for i in 1..10 {
con.command::<i64>(format!("zadd myset {} {}", i, i*i)).await?;
}
con.command::<Vec<String>>("zrange myset 0 -1".to_owned()).await
}
The following return types are supported:
()
, i64
, String
, Vec<i64>
, and Vec<String>
Dependencies
~3–11MB
~113K SLoC