diff --git a/litellm-rust/Cargo.lock b/litellm-rust/Cargo.lock index 7397742369b..9cfce7e0704 100644 --- a/litellm-rust/Cargo.lock +++ b/litellm-rust/Cargo.lock @@ -70,6 +70,12 @@ dependencies = [ "rustversion", ] +[[package]] +name = "arcstr" +version = "1.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "03918c3dbd7701a85c6b9887732e2921175f26c350b4563841d0958c21d57e6d" + [[package]] name = "async-compression" version = "0.4.46" @@ -1837,6 +1843,12 @@ version = "0.2.186" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66" +[[package]] +name = "linux-raw-sys" +version = "0.12.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53" + [[package]] name = "litellm-auth" version = "0.1.0" @@ -1915,6 +1927,17 @@ dependencies = [ "tokio", ] +[[package]] +name = "litellm-cache-redis" +version = "0.1.0" +dependencies = [ + "litellm-cache", + "redis", + "redis-test", + "serde_json", + "tokio", +] + [[package]] name = "litellm-core" version = "0.1.0" @@ -2140,6 +2163,16 @@ dependencies = [ "minimal-lexical", ] +[[package]] +name = "num-bigint" +version = "0.5.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "93e7820bc0a80a0238e650327316f929ba18d5be054b647490a3a6a339f3e7c0" +dependencies = [ + "num-integer", + "num-traits", +] + [[package]] name = "num-conv" version = "0.2.2" @@ -2656,6 +2689,36 @@ dependencies = [ "crossbeam-utils", ] +[[package]] +name = "redis" +version = "1.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "2acbc41a996f7652b2ddd9dfd98cc4ff602cfd742ae35382f07f608405ab50ed" +dependencies = [ + "arcstr", + "combine", + "itoa", + "num-bigint", + "percent-encoding", + "ryu", + "sha1_smol", + "socket2 0.6.5", + "url", + "xxhash-rust", +] + +[[package]] +name = "redis-test" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "804d36862e4323b69f96440cbb13c9894fc90176abdeaf91264e21d5d77f6aca" +dependencies = [ + "rand 0.9.5", + "redis", + "socket2 0.6.5", + "tempfile", +] + [[package]] name = "redox_syscall" version = "0.5.18" @@ -2846,6 +2909,19 @@ dependencies = [ "semver", ] +[[package]] +name = "rustix" +version = "1.1.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "891efababe418670775f199f0d233d84843c227a0949a883ce15b37c78d6629d" +dependencies = [ + "bitflags", + "errno", + "libc", + "linux-raw-sys", + "windows-sys 0.61.2", +] + [[package]] name = "rustls" version = "0.21.12" @@ -3096,6 +3172,12 @@ dependencies = [ "digest 0.10.7", ] +[[package]] +name = "sha1_smol" +version = "1.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bbfa15b3dddfee50a0fff136974b3e1bde555604ba463834a7eb7deb6417705d" + [[package]] name = "sha2" version = "0.10.9" @@ -3299,6 +3381,19 @@ version = "0.13.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca" +[[package]] +name = "tempfile" +version = "3.27.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd" +dependencies = [ + "fastrand", + "getrandom 0.4.3", + "once_cell", + "rustix", + "windows-sys 0.61.2", +] + [[package]] name = "thiserror" version = "1.0.69" @@ -4182,6 +4277,12 @@ version = "0.13.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "66fee0b777b0f5ac1c69bb06d361268faafa61cd4682ae064a171c16c433e9e4" +[[package]] +name = "xxhash-rust" +version = "0.8.18" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "aee1b19627c7c60102ab80d3a9cbe18de90bfe03bfa6c3715447681f0e8c8af6" + [[package]] name = "yoke" version = "0.8.3" diff --git a/litellm-rust/crates/cache-redis/Cargo.toml b/litellm-rust/crates/cache-redis/Cargo.toml new file mode 100644 index 00000000000..933b0feaae4 --- /dev/null +++ b/litellm-rust/crates/cache-redis/Cargo.toml @@ -0,0 +1,15 @@ +[package] +name = "litellm-cache-redis" +version = "0.1.0" +edition.workspace = true +license.workspace = true +repository.workspace = true + +[dependencies] +litellm-cache.workspace = true +redis = "1.7.0" +serde_json.workspace = true +tokio.workspace = true + +[dev-dependencies] +redis-test = "1.0.4" diff --git a/litellm-rust/crates/cache-redis/src/cache.rs b/litellm-rust/crates/cache-redis/src/cache.rs new file mode 100644 index 00000000000..69dee6c6363 --- /dev/null +++ b/litellm-rust/crates/cache-redis/src/cache.rs @@ -0,0 +1,315 @@ +use std::sync::{Arc, Mutex, MutexGuard}; +use std::time::Duration; + +use litellm_cache::{ + BaseCache, CacheConnectionResult, CacheConnectionStatus, CacheEntry, CacheFuture, CacheKwargs, + Error, +}; +use redis::Commands; + +const DEFAULT_TTL: Duration = Duration::from_secs(600); +const KEY_PREFIX: &str = "litellm-cache:"; + +pub struct RedisCache { + connection: Arc>, + default_ttl: Duration, +} + +impl RedisCache { + pub fn new(url: &str, default_ttl: Option) -> Result { + let client = redis::Client::open(url).map_err(|_| Error::Unavailable)?; + let connection = client.get_connection().map_err(|_| Error::Unavailable)?; + Ok(Self::with_connection(connection, default_ttl)) + } +} + +impl RedisCache +where + C: redis::ConnectionLike + Send + 'static, +{ + fn with_connection(connection: C, default_ttl: Option) -> Self { + Self { + connection: Arc::new(Mutex::new(connection)), + default_ttl: default_ttl.unwrap_or(DEFAULT_TTL), + } + } + + fn connection(&self) -> Result, Error> { + self.connection.lock().map_err(|_| Error::Unavailable) + } + + fn namespaced_key(key: &str) -> String { + format!("{KEY_PREFIX}{key}") + } + + fn namespaced_pattern() -> &'static str { + const PATTERN: &str = "litellm-cache:*"; + PATTERN + } + + fn encode(value: &CacheEntry) -> Result, Error> { + serde_json::to_vec(value).map_err(|_| Error::InvalidEntry) + } + + fn decode(value: Vec) -> Result { + serde_json::from_slice(&value).map_err(|_| Error::InvalidEntry) + } + + fn ttl_seconds(ttl: Duration) -> u64 { + ttl.as_secs() + .saturating_add(u64::from(ttl.subsec_nanos() > 0)) + .max(1) + } + + fn run_blocking(connection: Arc>, operation: F) -> CacheFuture<'static, T> + where + T: Send + 'static, + F: FnOnce(&mut C) -> Result + Send + 'static, + { + Box::pin(async move { + tokio::task::spawn_blocking(move || { + let mut connection = connection.lock().map_err(|_| Error::Unavailable)?; + operation(&mut connection) + }) + .await + .map_err(|_| Error::Unavailable)? + }) + } +} + +impl BaseCache for RedisCache +where + C: redis::ConnectionLike + Send + 'static, +{ + type Value = CacheEntry; + + fn default_ttl(&self) -> Duration { + self.default_ttl + } + + fn set_cache(&self, key: &str, value: Self::Value, kwargs: CacheKwargs) -> Result<(), Error> { + let payload = Self::encode(&value)?; + let ttl = Self::ttl_seconds(self.get_ttl(&kwargs)); + self.connection()? + .set_ex::<_, _, ()>(Self::namespaced_key(key), payload, ttl) + .map_err(|_| Error::Unavailable) + } + + fn get_cache(&self, key: &str, _: &CacheKwargs) -> Result, Error> { + self.connection()? + .get::<_, Option>>(Self::namespaced_key(key)) + .map_err(|_| Error::Unavailable)? + .map(Self::decode) + .transpose() + } + + fn delete_cache(&self, key: &str) -> Result<(), Error> { + self.connection()? + .del::<_, ()>(Self::namespaced_key(key)) + .map_err(|_| Error::Unavailable) + } + + fn flush_cache(&self) -> Result<(), Error> { + let mut connection = self.connection()?; + let keys = connection + .scan_match(Self::namespaced_pattern()) + .map_err(|_| Error::Unavailable)? + .collect::>>() + .map_err(|_| Error::Unavailable)?; + if keys.is_empty() { + return Ok(()); + } + connection + .del::<_, usize>(keys) + .map(|_| ()) + .map_err(|_| Error::Unavailable) + } + + fn async_set_cache<'a>( + &'a self, + key: &'a str, + value: Self::Value, + kwargs: CacheKwargs, + ) -> CacheFuture<'a, ()> { + let payload = Self::encode(&value); + let key = Self::namespaced_key(key); + let ttl = Self::ttl_seconds(self.get_ttl(&kwargs)); + Self::run_blocking(Arc::clone(&self.connection), move |connection| { + connection + .set_ex::<_, _, ()>(key, payload?, ttl) + .map_err(|_| Error::Unavailable) + }) + } + + fn async_get_cache<'a>( + &'a self, + key: &'a str, + _: &'a CacheKwargs, + ) -> CacheFuture<'a, Option> { + let key = Self::namespaced_key(key); + Box::pin(async move { + Self::run_blocking(Arc::clone(&self.connection), move |connection| { + connection + .get::<_, Option>>(key) + .map_err(|_| Error::Unavailable) + }) + .await? + .map(Self::decode) + .transpose() + }) + } + + fn async_set_cache_pipeline<'a>( + &'a self, + cache_list: Vec<(String, Self::Value)>, + kwargs: CacheKwargs, + ) -> CacheFuture<'a, ()> { + let entries = cache_list + .into_iter() + .map(|(key, value)| { + Self::encode(&value).map(|payload| (Self::namespaced_key(&key), payload)) + }) + .collect::, _>>(); + let ttl = Self::ttl_seconds(self.get_ttl(&kwargs)); + Self::run_blocking(Arc::clone(&self.connection), move |connection| { + for (key, payload) in entries? { + connection + .set_ex::<_, _, ()>(key, payload, ttl) + .map_err(|_| Error::Unavailable)?; + } + Ok(()) + }) + } + + fn async_delete_cache<'a>(&'a self, key: &'a str) -> CacheFuture<'a, ()> { + let key = Self::namespaced_key(key); + Self::run_blocking(Arc::clone(&self.connection), move |connection| { + connection.del::<_, ()>(key).map_err(|_| Error::Unavailable) + }) + } + + fn disconnect(&self) -> CacheFuture<'_, ()> { + Box::pin(async { Ok(()) }) + } + + fn test_connection(&self) -> CacheFuture<'_, CacheConnectionResult> { + Box::pin(async move { + Self::run_blocking(Arc::clone(&self.connection), |connection| { + redis::cmd("PING") + .query::(connection) + .map_err(|_| Error::Unavailable) + }) + .await?; + Ok(CacheConnectionResult { + status: CacheConnectionStatus::Success, + message: "Redis cache connection test successful".into(), + error: None, + }) + }) + } +} + +#[cfg(test)] +mod tests { + use super::RedisCache; + use litellm_cache::{BaseCache, CacheEntry, CacheKwargs}; + use redis_test::{MockCmd, MockRedisConnection}; + use serde_json::json; + use std::time::Duration; + + fn entry() -> CacheEntry { + CacheEntry { + timestamp: 123.0, + response: json!({"choices": [{"text": "cached"}]}), + } + } + + #[test] + fn cache_entries_round_trip_through_json() { + let entry = entry(); + let encoded = RedisCache::::encode(&entry).unwrap(); + assert_eq!( + RedisCache::::decode(encoded).unwrap(), + entry + ); + } + + #[test] + fn invalid_json_is_rejected() { + assert!(RedisCache::::decode(b"not json".to_vec()).is_err()); + } + + #[test] + fn ttl_seconds_rounds_up_and_keeps_expiration_positive() { + assert_eq!( + RedisCache::::ttl_seconds(Duration::ZERO), + 1 + ); + assert_eq!( + RedisCache::::ttl_seconds(Duration::from_millis(1500)), + 2 + ); + assert_eq!( + RedisCache::::ttl_seconds(Duration::from_secs(15)), + 15 + ); + } + + #[test] + fn redis_commands_round_trip_entries_and_delete_only_namespaced_keys() { + let value = entry(); + let payload = RedisCache::::encode(&value).unwrap(); + let connection = MockRedisConnection::new([ + MockCmd::new( + redis::cmd("SETEX") + .arg("litellm-cache:key") + .arg(600) + .arg(payload.clone()), + Ok("OK"), + ), + MockCmd::new(redis::cmd("GET").arg("litellm-cache:key"), Ok(payload)), + MockCmd::new(redis::cmd("DEL").arg("litellm-cache:key"), Ok(1u32)), + ]) + .assert_all_commands_consumed(); + let cache = RedisCache::with_connection(connection, None); + + cache + .set_cache("key", value.clone(), CacheKwargs::default()) + .unwrap(); + assert_eq!( + cache.get_cache("key", &CacheKwargs::default()).unwrap(), + Some(value) + ); + cache.delete_cache("key").unwrap(); + } + + #[test] + fn flush_scans_and_deletes_only_cache_keys() { + let connection = MockRedisConnection::new([ + MockCmd::new( + redis::cmd("SCAN") + .cursor_arg(0) + .arg("MATCH") + .arg("litellm-cache:*"), + Ok(redis_test::redis_value!(["0", ["litellm-cache:key"]])), + ), + MockCmd::new(redis::cmd("DEL").arg("litellm-cache:key"), Ok(1u32)), + ]) + .assert_all_commands_consumed(); + let cache = RedisCache::with_connection(connection, None); + + cache.flush_cache().unwrap(); + } + + #[tokio::test] + async fn test_connection_runs_ping_off_executor() { + let connection = MockRedisConnection::new([MockCmd::new(redis::cmd("PING"), Ok("PONG"))]) + .assert_all_commands_consumed(); + let cache = RedisCache::with_connection(connection, None); + + assert_eq!( + cache.test_connection().await.unwrap().status, + litellm_cache::CacheConnectionStatus::Success + ); + } +} diff --git a/litellm-rust/crates/cache-redis/src/lib.rs b/litellm-rust/crates/cache-redis/src/lib.rs new file mode 100644 index 00000000000..37b35c5ea4a --- /dev/null +++ b/litellm-rust/crates/cache-redis/src/lib.rs @@ -0,0 +1,3 @@ +mod cache; + +pub use cache::RedisCache; diff --git a/litellm-rust/crates/cache-redis/tests/cache.rs b/litellm-rust/crates/cache-redis/tests/cache.rs new file mode 100644 index 00000000000..76f73145da8 --- /dev/null +++ b/litellm-rust/crates/cache-redis/tests/cache.rs @@ -0,0 +1,6 @@ +use litellm_cache_redis::RedisCache; + +#[test] +fn constructor_rejects_invalid_urls() { + assert!(RedisCache::new("not a redis url", None).is_err()); +}