Fred
====
[](https://opensource.org/licenses/MIT)
[](https://opensource.org/licenses/Apache-2.0)
[](https://circleci.com/gh/aembke/fred.rs/tree/main)
[](https://crates.io/crates/fred)
[](https://docs.rs/fred)
An async client for Redis and Valkey
## Example
```rust
use fred::prelude::*;
#[tokio::main]
async fn main() -> Result<(), RedisError> {
let client = RedisClient::default();
client.init().await?;
// convert responses to many common Rust types
let foo: Option<String> = client.get("foo").await?;
assert!(foo.is_none());
client.set("foo", "bar", None, None, false).await?;
// or use turbofish to declare response types
println!("Foo: {:?}", client.get::<String, _>("foo").await?);
client.quit().await?;
Ok(())
}
```
See the [examples](https://github.com/aembke/fred.rs/tree/main/examples) for more.
## Features
* RESP2 and RESP3 protocol modes.
* Clustered, centralized, and sentinel server deployments.
* TLS via `native-tls` or `rustls`.
* Unix sockets.
* Automatic reconnection interfaces.
* Publish-Subscribe and keyspace events interfaces.
* A round-robin client pooling interface.
* A round-robin replica routing interface.
* Built-in mocking interfaces.
* Lua [scripts](https://redis.io/docs/interact/programmability/eval-intro/)
or [functions](https://redis.io/docs/interact/programmability/functions-intro/).
* [Transactions](https://redis.io/docs/interact/transactions/)
* [Pipelining](https://redis.io/topics/pipelining)
* [Client Tracking](https://redis.io/docs/manual/client-side-caching/)
* [Automatic pipelining](bin/benchmark/README.md)
* [Zero-copy frame parsing](https://github.com/aembke/redis-protocol.rs)
* [Tracing](https://github.com/tokio-rs/tracing)
See the build features for more information.
## Client Features
| `transactions` | x | Enable a [Transaction](https://redis.io/docs/interact/transactions/) interface. |
| `enable-native-tls` | | Enable TLS support via [native-tls](https://crates.io/crates/native-tls). |
| `enable-rustls` | | Enable TLS support via [rustls](https://crates.io/crates/rustls) with the default crypto backend features. |
| `enable-rustls-ring` | | Enable TLS support via [rustls](https://crates.io/crates/rustls) and the ring crypto backend. |
| `vendored-openssl` | | Enable the `native-tls/vendored` feature. |
| `metrics` | | Enable the metrics interface to track overall latency, network latency, and request/response sizes. |
| `full-tracing` | | Enable full [tracing](./src/trace/README.md) support. This can emit a lot of data. |
| `partial-tracing` | | Enable partial [tracing](./src/trace/README.md) support, only emitting traces for top level commands and network latency. |
| `blocking-encoding` | | Use a blocking task for encoding or decoding frames. This can be useful for clients that send or receive large payloads, but requires a multi-thread Tokio runtime. |
| `custom-reconnect-errors` | | Enable an interface for callers to customize the types of errors that should automatically trigger reconnection logic. |
| `monitor` | | Enable an interface for running the `MONITOR` command. |
| `sentinel-client` | | Enable an interface for communicating directly with Sentinel nodes. This is not necessary to use normal Redis clients behind a sentinel layer. |
| `sentinel-auth` | | Enable an interface for using different authentication credentials to sentinel nodes. |
| `subscriber-client` | | Enable a subscriber client interface that manages channel subscription state for callers. |
| `serde-json` | | Enable an interface to automatically convert Redis types to JSON via `serde-json`. |
| `mocks` | | Enable a mocking layer interface that can be used to intercept and process commands in tests. |
| `dns` | | Enable an interface that allows callers to override the DNS lookup logic. |
| `replicas` | | Enable an interface that routes commands to replica nodes. |
| `default-nil-types` | | Enable a looser parsing interface for `nil` values. |
| `sha-1` | | Enable an interface for hashing Lua scripts. |
| `unix-sockets` | | Enable Unix socket support. |
| `credential-provider` | | Enable an interface that can dynamically load auth credentials at runtime. |
| `specialize-into-bytes` | | Specialize `TryFrom<Vec<u8> for RedisValue>` to use `RedisValue::Bytes`, disabling `From<u8> for RedisValue`. This is a temporary feature flag that will be made the default in the next major version. |
| `glommio` | | Enable experimental [Glommio](https://github.com/DataDog/glommio) support. |
## Interface Features
The command interfaces have many functions and compile times can add up quickly. Interface features
begin with `i-` and control which public interfaces are built.
| `i-all` | | Enable the interfaces included with a basic Redis or Valkey installation. This does not include `i-redis-stack` features. |
| `i-std` | x | Enable the common data structure interfaces (lists, sets, streams, keys, etc). |
| `i-acl` | | Enable the ACL command interface. |
| `i-client` | | Enable the CLIENT command interface. |
| `i-cluster` | | Enable the CLUSTER command interface. |
| `i-config` | | Enable the CONFIG command interface. |
| `i-geo` | | Enable the GEO command interface. |
| `i-hashes` | | Enable the hashes (HGET, etc) command interface. |
| `i-hyperloglog` | | Enable the hyperloglog command interface. |
| `i-keys` | | Enable the main keys (GET, SET, etc) command interface. |
| `i-lists` | | Enable the lists (LPUSH, etc) command interface. |
| `i-scripts` | | Enable the scripting command interfaces. |
| `i-memory` | | Enable the MEMORY command interfaces. |
| `i-pubsub` | | Enable the publish-subscribe command interfaces. |
| `i-server` | | Enable the server control (SHUTDOWN, BGSAVE, etc) interfaces. |
| `i-sets` | | Enable the sets (SADD, etc) interface. |
| `i-sorted-sets` | | Enable the sorted sets (ZADD, etc) interface. |
| `i-slowlog` | | Enable the SLOWLOG interface. |
| `i-streams` | | Enable the streams (XADD, etc) interface. |
| `i-tracking` | | Enable a [client tracking](https://redis.io/docs/manual/client-side-caching/) interface. |
| `i-time-series` | | Enable a [Redis Timeseries](https://redis.io/docs/data-types/timeseries/) interface. |
| `i-redis-json` | | Enable a [RedisJSON](https://github.com/RedisJSON/RedisJSON) interface. |
| `i-redisearch` | | Enable a [RediSearch](https://github.com/RediSearch/RediSearch) interface. |
| `i-redis-stack` | | Enable the [Redis Stack](https://github.com/redis-stack) interfaces (`i-redis-json`, `i-time-series`, etc). |
If a specific high level command function is not supported callers can use the `custom` function as a workaround until
the higher level interface is added. See the [custom](https://github.com/aembke/fred.rs/blob/main/examples/custom.rs)
example for more info.
## Debugging Features
| `debug-ids` | | Enable a global counter used to differentiate commands in logs. |
| `network-logs` | | Enable additional TRACE logs for all frames on all sockets. |