rocket_cors/examples/mix.rs

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//! This is an example of how you can mix and match the "Truly manual" mode with "Guard".
//!
//! In this example, you typically have an application wide `Cors` struct except for one specific
//! `ping` route that you want to allow all Origins to access.
#![feature(proc_macro_hygiene, decl_macro)]
use rocket;
use rocket_cors;
use rocket::http::Method;
use rocket::response::Responder;
use rocket::{get, options, routes};
use rocket_cors::{AllowedHeaders, AllowedOrigins, CorsOptions, Guard};
/// The "usual" app route
#[get("/")]
fn app(cors: Guard<'_>) -> rocket_cors::Responder<'_, &str> {
cors.responder("Hello CORS!")
}
/// The special "ping" route
#[get("/ping")]
fn ping<'r>() -> impl Responder<'r> {
let cors = cors_options_all().to_cors()?;
cors.respond_owned(|guard| guard.responder("Pong!"))
}
/// You need to define an OPTIONS route for preflight checks if you want to use `Cors` struct
/// that is not in Rocket's managed state.
/// These routes can just return the unit type `()`
#[options("/ping")]
fn ping_options<'r>() -> impl Responder<'r> {
let cors = cors_options_all().to_cors()?;
cors.respond_owned(|guard| guard.responder(()))
}
/// Returns the "application wide" Cors struct
fn cors_options() -> CorsOptions {
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let allowed_origins = AllowedOrigins::some_exact(&["https://www.acme.com"]);
// You can also deserialize this
rocket_cors::CorsOptions {
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allowed_origins,
allowed_methods: vec![Method::Get].into_iter().map(From::from).collect(),
allowed_headers: AllowedHeaders::some(&["Authorization", "Accept"]),
allow_credentials: true,
..Default::default()
}
}
/// A special struct that allows all origins
///
/// Note: In your real application, you might want to use something like `lazy_static` to generate
/// a `&'static` reference to this instead of creating a new struct on every request.
fn cors_options_all() -> CorsOptions {
// You can also deserialize this
Default::default()
}
fn main() {
rocket::ignite()
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.mount("/", routes![app, ping, ping_options,])
.mount("/", rocket_cors::catch_all_options_routes()) // mount the catch all routes
.manage(cors_options().to_cors().expect("To not fail"))
.launch();
}