### Declaration Order Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Illustrative example of Rust declaration order. ```rust pub fn build_request() -> Request { // ... } pub async fn fetch_response() -> Response { // ... } ``` -------------------------------- ### Quick Start Source: https://github.com/hack-ink/jwks-cache/blob/main/README.md Example of setting up and using the jwks-cache registry. ```rust #[tokio::main] async fn main() -> anyhow::Result<()> { tracing_subscriber::fmt::init(); // Optional Prometheus exporter (requires the `prometheus` feature). jwks_cache::install_default_exporter()?; let registry = jwks_cache::Registry::builder() .require_https(true) .add_allowed_domain("tenant-a.auth0.com") .with_redis_client(redis::Client::open("redis://127.0.0.1/")?) .build(); let mut registration = jwks_cache::IdentityProviderRegistration::new( "tenant-a", "auth0", "https://tenant-a.auth0.com/.well-known/jwks.json", )?; registration.stale_while_error = std::time::Duration::from_secs(90); registry.register(registration).await?; let jwks = registry.resolve("tenant-a", "auth0", None).await?; println!("Fetched {} keys.", jwks.keys.len()); // No-op unless the `redis` feature is enabled. registry.persist_all().await?; Ok(()) } ``` -------------------------------- ### Structs, Enums, and Impl Blocks - Allowed Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Illustrative example of allowed usage of `Self` in impl blocks. ```rust struct A; impl A { fn new() -> Self { Self } fn from_owned(value: Self) -> Self { value } fn from_ref(value: &Self) -> &Self { value } fn collect_all(values: &[Self]) -> Vec { values.to_vec() } } ``` -------------------------------- ### Structs, Enums, and Impl Blocks - Forbidden Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Illustrative example of forbidden usage of concrete type names in impl blocks. ```rust struct A; impl A { fn new() -> A { A } fn from_owned(value: A) -> A { value } fn from_ref(value: &A) -> &A { value } fn collect_all(values: &[A]) -> Vec { values.to_vec() } } ``` -------------------------------- ### Numeric Literals - Allowed Examples Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Allowed numeric literal formatting. ```rust 10_f64. 1_u32. 0_i64. 1_000. 10_000. 1_000_000. ``` -------------------------------- ### Installation Source: https://github.com/hack-ink/jwks-cache/blob/main/README.md Add the crate to your project and enable optional integrations as needed. ```toml # Cargo.toml [dependencies] # Drop `redis` if persistence is unnecessary. jwks-cache = { version = "0.1", features = ["redis"] } jsonwebtoken = { version = "10.1" } metrics = { version = "0.24" } reqwest = { version = "0.12", features = ["http2", "json", "rustls-tls", "stream"] } tracing = { version = "0.1" } tokio = { version = "1.48", features = ["macros", "rt-multi-thread", "sync", "time"] } ``` -------------------------------- ### Logging Rules - Allowed Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Allowed usage of fully qualified tracing macros with structured fields. ```rust tracing::info!(user_id, org_id, "User logged in."); ``` -------------------------------- ### Redis Persistence Example Source: https://github.com/hack-ink/jwks-cache/blob/main/README.md Demonstrates how to configure the Registry with Redis support for persisting JWKS payloads between deploys, including restoring from persistence on startup and persisting on shutdown. ```rust let registry = jwks_cache::Registry::builder() .require_https(true) .add_allowed_domain("tenant-a.auth0.com") .with_redis_client(redis::Client::open("redis://127.0.0.1/")?) .build(); // During startup: registry.restore_from_persistence().await?; // On graceful shutdown: registry.persist_all().await?; ``` -------------------------------- ### Numeric Literals - Forbidden Examples Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Forbidden numeric literal formatting. ```rust 10f64. 1u32. 0i64. 1000. 10000. 1000000. ``` -------------------------------- ### Error Enum Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Illustrative example of an error enum using thiserror for wrapping different error types with contextual messages. ```rust #[derive(Debug, thiserror::Error)] pub enum Error { #[error(transparent)] Utf8(#[from] std::str::Utf8Error), #[error("Failed to serialize JWKS payload: {0}.")] Json(#[from] serde_json::Error), } ``` -------------------------------- ### Generics and Trait Bounds - Allowed Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Allowed usage of `where` clause for trait bounds. ```rust fn render(value: T) -> String where T: Display, { ``` -------------------------------- ### Generics and Trait Bounds - Forbidden Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Forbidden usage of inline trait bounds. ```rust fn render(value: T) -> String { ``` -------------------------------- ### Logging Rules - Forbidden Example Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/guide/development/languages/rust.md Forbidden usage of encoding values only in the message string. ```rust tracing::info!("User {user_id} logged in (org {org_id})."); ``` -------------------------------- ### Development Commands Source: https://github.com/hack-ink/jwks-cache/blob/main/README.md Commands for formatting, linting, and testing the project. ```bash cargo fmt cargo clippy --all-targets --all-features cargo test cargo test --features redis ``` -------------------------------- ### Common cargo make tasks Source: https://github.com/hack-ink/jwks-cache/blob/main/AGENTS.md Preferred tasks for common workflows using cargo make. ```shell cargo make fmt # or cargo make fmt-check cargo make lint # for full workspace, or cargo make lint-rust # for Rust-only. cargo make test # for full workspace, or cargo make test-rust # for Rust-only. cargo make checks ``` -------------------------------- ### Repository Layout Source: https://github.com/hack-ink/jwks-cache/blob/main/docs/spec/architecture.md The current layout of the jwks-cache repository, showing directories and key files. ```shell . ├── docs/ │ ├── guide/ # Operational guidance and development rules. │ └── spec/ # Normative system specifications. ├── src/ # Library implementation. ├── tests/ # Integration tests (wiremock). ├── Cargo.toml # Crate metadata and dependencies. ├── Makefile.toml # Use `cargo make fmt`, `cargo make lint`, `cargo make test`, `cargo make test-redis`. ├── README.md # Public-facing overview and usage. └── rust-toolchain.toml # Pinned Rust toolchain. ``` -------------------------------- ### Validating Tokens Source: https://github.com/hack-ink/jwks-cache/blob/main/README.md Use the registry to resolve a `kid` and build a `DecodingKey` for `jsonwebtoken`. ```rust use jsonwebtoken::{Algorithm, DecodingKey, Validation}; use jwks_cache::Registry; use serde::Deserialize; #[derive(Debug, Deserialize)] struct Claims { sub: String, exp: usize, aud: Vec, } async fn verify(registry: &Registry, token: &str) -> Result> { let header = jsonwebtoken::decode_header(token)?; let kid = header.kid.ok_or("token is missing a kid claim")?; let jwks = registry.resolve("tenant-a", "auth0", Some(&kid)).await?; let jwk = jwks.find(&kid).ok_or("no JWKS entry found for kid")?; let decoding_key = DecodingKey::from_jwk(jwk)?; let mut validation = Validation::new(header.alg); validation.set_audience(&["api://default"]); let token = jsonwebtoken::decode::(token, &decoding_key, &validation)?; Ok(token.claims) } ``` === COMPLETE CONTENT === This response contains all available snippets from this library. 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