2515 lines
86 KiB
Rust
2515 lines
86 KiB
Rust
//! [](https://travis-ci.org/lawliet89/rocket_cors)
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//! [](https://dependencyci.com/github/lawliet89/rocket_cors)
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//! [](https://github.com/lawliet89/rocket_cors)
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//! [](https://crates.io/crates/rocket_cors)
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//!
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//! - Documentation: [master branch](https://lawliet89.github.io/rocket_cors)
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//!
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//! Cross-origin resource sharing (CORS) for [Rocket](https://rocket.rs/) applications
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//!
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//! ## Requirements
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//!
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//! - Nightly Rust
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//! - Rocket >= 0.3
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//!
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//! ### Nightly Rust
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//!
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//! Rocket requires nightly Rust. You should probably install Rust with
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//! [rustup](https://www.rustup.rs/), then override the code directory to use nightly instead of
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//! stable. See
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//! [installation instructions](https://rocket.rs/guide/getting-started/#installing-rust).
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//!
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//! In particular, `rocket_cors` is currently targetted for `nightly-2017-07-21`. Newer nightlies
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//! might work, but it's not guaranteed.
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//!
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//! ## Installation
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//!
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//! Add the following to Cargo.toml:
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//!
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//! ```toml
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//! rocket_cors = "0.1.4"
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//! ```
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//!
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//! To use the latest `master` branch, for example:
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//!
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//! ```toml
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//! rocket_cors = { git = "https://github.com/lawliet89/rocket_cors", branch = "master" }
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//! ```
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//!
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//! ## Usage
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//!
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//! Before you can add CORS responses to your application, you need to create a `Cors` struct that
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//! will hold the settings.
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//!
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//! Each of the examples can be run off the repository via `cargo run --example xxx` where `xxx` is
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//!
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//! - `fairing`
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//! - `guard`
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//! - `manual`
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//!
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//! ### `Cors` Struct
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//!
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//! The [`Cors` struct](struct.Cors.html) contains the settings for CORS requests to be validated
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//! and for responses to be generated. Defaults are defined for every field in the struct, and
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//! are documented on the [`Cors` struct](struct.Cors.html) page. You can also deserialize
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//! the struct from some format like JSON, YAML or TOML.
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//!
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//! ### Three modes of operation
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//!
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//! You can add CORS to your routes via one of three ways, in descending order of ease and in
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//! ascending order of flexibility.
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//!
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//! - Fairing (should only used exclusively)
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//! - Request Guard
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//! - Truly Manual
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//!
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//! Unfortunately, you cannot mix and match Fairing with any other of the methods, due to the
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//! limitation of Rocket's fairing API. That is, the checks for Fairing will always happen first,
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//! and if they fail, the route is never executed and so your guard or manual checks will never
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//! get executed.
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//!
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//! You can, however, mix and match guards and manual checks.
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//!
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//! In summary:
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//!
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//! | | Fairing | Request Guard | Manual |
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//! |:---------------------------------------:|:-------:|:-------------:|:------:|
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//! | Must apply to all routes | ✔ | ✗ | ✗ |
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//! | Different settings for different routes | ✗ | ✗ | ✔ |
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//! | May define custom OPTIONS routes | ✗ | ✔ | ✔ |
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//!
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//! ### Fairing
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//!
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//! Fairing is the easiest to use and also the most inflexible. You don't have to define `OPTIONS`
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//! routes for your application, and the checks are done transparently.
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//!
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//! However, you can only have one set of settings that must apply to all routes. You cannot opt
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//! any route out of CORS checks.
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//!
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//! To use this, simply create a [`Cors` struct](struct.Cors.html) and then
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//! [`attach`](https://api.rocket.rs/rocket/struct.Rocket.html#method.attach) it to Rocket.
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//!
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//! ```rust,no_run
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//! #![feature(plugin, custom_derive)]
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//! #![plugin(rocket_codegen)]
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//! extern crate rocket;
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//! extern crate rocket_cors;
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//!
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//! use rocket::http::Method;
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//! use rocket_cors::{AllowedOrigins, AllowedHeaders};
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//!
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//! #[get("/")]
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//! fn cors<'a>() -> &'a str {
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//! "Hello CORS"
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//! }
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//!
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//! fn main() {
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//! let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
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//! assert!(failed_origins.is_empty());
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//!
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//! // You can also deserialize this
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//! let options = rocket_cors::Cors {
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//! allowed_origins: allowed_origins,
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//! allowed_methods: vec![Method::Get].into_iter().map(From::from).collect(),
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//! allowed_headers: AllowedHeaders::some(&["Authorization", "Accept"]),
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//! allow_credentials: true,
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//! ..Default::default()
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//! };
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//!
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//! rocket::ignite()
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//! .mount("/", routes![cors])
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//! .attach(options)
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//! .launch();
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//! }
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//!
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//! ```
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//!
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//! ### Request Guard
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//!
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//! Using request guard requires you to sacrifice the convenience of Fairings for being able to
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//! opt some routes out of CORS checks and enforcement. _BUT_ you are still restricted to only
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//! one set of CORS settings and you have to mount additional routes to catch and process OPTIONS
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//! requests. The `OPTIONS` routes are used for CORS preflight checks.
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//!
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//! You will have to do the following:
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//!
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//! - Create a [`Cors` struct](struct.Cors.html) and during Rocket's ignite, add the struct to
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//! Rocket's [managed state](https://rocket.rs/guide/state/#managed-state).
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//! - For all the routes that you want to enforce CORS on, you can mount either some
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//! [catch all route](fn.catch_all_options_routes.html) or define your own route for the OPTIONS
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//! verb.
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//! - Then in all the routes you want to enforce CORS on, add a
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//! [Request Guard](https://rocket.rs/guide/requests/#request-guards) for the
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//! [`Guard`](struct.Guard.html) struct in the route arguments. You should not wrap this in an
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//! `Option` or `Result` because the guard will let non-CORS requests through and will take over
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//! error handling in case of errors.
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//! - In your routes, to add CORS headers to your responses, use the appropriate functions on the
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//! [`Guard`](struct.Guard.html) for a `Response` or a `Responder`.
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//!
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//! ```rust,no_run
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//! #![feature(plugin)]
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//! #![plugin(rocket_codegen)]
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//! extern crate rocket;
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//! extern crate rocket_cors;
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//!
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//! use std::io::Cursor;
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//!
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//! use rocket::Response;
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//! use rocket::http::Method;
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//! use rocket_cors::{Guard, AllowedOrigins, AllowedHeaders, Responder};
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//!
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//! /// Using a `Responder` -- the usual way you would use this
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//! #[get("/")]
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//! fn responder(cors: Guard) -> Responder<&str> {
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//! cors.responder("Hello CORS!")
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//! }
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//!
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//! /// Using a `Response` instead of a `Responder`. You generally won't have to do this.
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//! #[get("/response")]
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//! fn response(cors: Guard) -> Response {
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//! let mut response = Response::new();
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//! response.set_sized_body(Cursor::new("Hello CORS!"));
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//! cors.response(response)
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//! }
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//!
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//! /// Manually mount an OPTIONS route for your own handling
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//! #[options("/manual")]
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//! fn manual_options(cors: Guard) -> Responder<&str> {
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//! cors.responder("Manual OPTIONS preflight handling")
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//! }
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//!
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//! /// Manually mount an OPTIONS route for your own handling
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//! #[get("/manual")]
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//! fn manual(cors: Guard) -> Responder<&str> {
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//! cors.responder("Manual OPTIONS preflight handling")
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//! }
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//!
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//! fn main() {
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//! let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
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//! assert!(failed_origins.is_empty());
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//!
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//! // You can also deserialize this
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//! let options = rocket_cors::Cors {
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//! allowed_origins: allowed_origins,
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//! allowed_methods: vec![Method::Get].into_iter().map(From::from).collect(),
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//! allowed_headers: AllowedHeaders::some(&["Authorization", "Accept"]),
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//! allow_credentials: true,
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//! ..Default::default()
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//! };
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//!
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//! rocket::ignite()
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//! .mount(
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//! "/",
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//! routes![responder, response],
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//! )
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//! // Mount the routes to catch all the OPTIONS pre-flight requests
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//! .mount("/", rocket_cors::catch_all_options_routes())
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//! // You can also manually mount an OPTIONS route that will be used instead
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//! .mount("/", routes![manual, manual_options])
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//! .manage(options)
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//! .launch();
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//! }
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//! ```
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//!
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//! ## Truly Manual
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//!
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//! This mode is the most difficult to use but offers the most amount of flexibility.
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//! You might have to understand how the library works internally to know how to use this mode.
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//! In exchange, you can selectively choose which routes to offer CORS protection to, and you
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//! can mix and match CORS settings for the routes. You can combine usage of this mode with
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//! "guard" to offer a mix of ease of use and flexibility.
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//!
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//! You really do not need to use this unless you have a truly ad-hoc need to respond to CORS
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//! differently in a route. For example, you have a `ping` endpoint that allows all origins but
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//! the rest of your routes do not.
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//!
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//! ### Handler
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//!
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//! This mode requires that you pass in a closure that will be lazily evaluated once a CORS request
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//! has been validated. If validation fails, the closure will not be run. You should put any code
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//! that has any side effects or with an appreciable computation cost inside this handler.
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//!
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//! ### Steps to perform:
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//! - Your crate will need to enable the
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//! [`conservative_impl_trait`](https://github.com/rust-lang/rfcs/blob/master/text/1522-conservative-impl-trait.md)
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//! feature. You can use `#![feature(conservative_impl_trait)]` at your crate root.
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//! Otherwise, the return type of your routes will be unspecifiable.
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//! - You will first need to have a `Cors` struct ready. This struct can be borrowed with a lifetime
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//! at least as long as `'r` which is the lifetime of a Rocket request. `'static` works too.
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//! In this case, you might as well use the `Guard` method above and place the `Cors` struct in
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//! Rocket's [state](https://rocket.rs/guide/state/).
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//! Alternatively, you can create a `Cors` struct directly in the route.
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//! - Your routes will need to have a `'r` lifetime and return `impl Responder<'r>`.
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//! - Using the `Cors` struct, use either the
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//! [`respond_owned`](struct.Cors.html#method.respond_owned) or
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//! [`respond_borrowed`](struct.Cors.html#method.respond_borrowed) function and pass in a handler
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//! that will be executed once CORS validation is successful.
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//! - Your handler will be passed a [`Guard`](struct.Guard.html) which you will have to use to
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//! add CORS headers into your own response.
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//! - You will have to manually define your own `OPTIONS` routes.
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//!
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//! ### Notes about route lifetime
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//! It is unfortunate that you have to manually specify the `'r` lifetimes in your routes.
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//! Leaving out the lifetime will result in a
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//! [compiler panic](https://github.com/rust-lang/rust/issues/43380). Even if the panic is fixed,
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//! it is not known if we can exclude the lifetime because lifetimes are _elided_ in Rust,
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//! not inferred.
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//!
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//! ### Owned example
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//! This is the most likely scenario when you want to have manual CORS validation. You can use this
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//! when the settings you want to use for a route is not the same as the rest of the application
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//! (which you might have put in Rocket's state).
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//!
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//! ```rust,no_run
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//! #![feature(plugin, conservative_impl_trait)]
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//! #![plugin(rocket_codegen)]
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//! extern crate rocket;
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//! extern crate rocket_cors;
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//!
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//! use rocket::http::Method;
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//! use rocket::response::Responder;
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//! use rocket_cors::{Cors, AllowedOrigins, AllowedHeaders};
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//!
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//! /// Create and use an ad-hoc Cors
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//! #[get("/owned")]
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//! fn owned<'r>() -> impl Responder<'r> {
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//! let options = cors_options();
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//! options.respond_owned(|guard| guard.responder("Hello CORS"))
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//! }
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//!
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//! /// You need to define an OPTIONS route for preflight checks.
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//! /// These routes can just return the unit type `()`
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//! #[options("/owned")]
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//! fn owned_options<'r>() -> impl Responder<'r> {
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//! let options = cors_options();
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//! options.respond_owned(|guard| guard.responder(()))
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//! }
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//!
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//! fn cors_options() -> Cors {
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//! let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
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//! assert!(failed_origins.is_empty());
|
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//!
|
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//! // You can also deserialize this
|
||
//! rocket_cors::Cors {
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//! allowed_origins: allowed_origins,
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//! allowed_methods: vec![Method::Get].into_iter().map(From::from).collect(),
|
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//! allowed_headers: AllowedHeaders::some(&["Authorization", "Accept"]),
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//! allow_credentials: true,
|
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//! ..Default::default()
|
||
//! }
|
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//! }
|
||
//!
|
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//! fn main() {
|
||
//! rocket::ignite()
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//! .mount(
|
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//! "/",
|
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//! routes![
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//! owned,
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//! owned_options,
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||
//! ],
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//! )
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//! .manage(cors_options())
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//! .launch();
|
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//! }
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//! ```
|
||
//!
|
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//! ### Borrowed Example
|
||
//! You might want to borrow the `Cors` struct from Rocket's state, for example. Unless you have
|
||
//! special handling, you might want to use the Guard method instead which has less hassle.
|
||
//!
|
||
//! ```rust,no_run
|
||
//! #![feature(plugin, conservative_impl_trait)]
|
||
//! #![plugin(rocket_codegen)]
|
||
//! extern crate rocket;
|
||
//! extern crate rocket_cors;
|
||
//!
|
||
//! use std::io::Cursor;
|
||
//!
|
||
//! use rocket::{State, Response};
|
||
//! use rocket::http::Method;
|
||
//! use rocket::response::Responder;
|
||
//! use rocket_cors::{Cors, AllowedOrigins, AllowedHeaders};
|
||
//!
|
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//! /// Using a borrowed Cors
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//! #[get("/")]
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//! fn borrowed<'r>(options: State<'r, Cors>) -> impl Responder<'r> {
|
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//! options.inner().respond_borrowed(
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//! |guard| guard.responder("Hello CORS"),
|
||
//! )
|
||
//! }
|
||
//!
|
||
//! /// Using a `Response` instead of a `Responder`. You generally won't have to do this.
|
||
//! #[get("/response")]
|
||
//! fn response<'r>(options: State<'r, Cors>) -> impl Responder<'r> {
|
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//! let mut response = Response::new();
|
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//! response.set_sized_body(Cursor::new("Hello CORS!"));
|
||
//!
|
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//! options.inner().respond_borrowed(
|
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//! move |guard| guard.response(response),
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//! )
|
||
//! }
|
||
//!
|
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//! fn cors_options() -> Cors {
|
||
//! let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
|
||
//! assert!(failed_origins.is_empty());
|
||
//!
|
||
//! // You can also deserialize this
|
||
//! rocket_cors::Cors {
|
||
//! allowed_origins: allowed_origins,
|
||
//! allowed_methods: vec![Method::Get].into_iter().map(From::from).collect(),
|
||
//! allowed_headers: AllowedHeaders::some(&["Authorization", "Accept"]),
|
||
//! allow_credentials: true,
|
||
//! ..Default::default()
|
||
//! }
|
||
//! }
|
||
//!
|
||
//! fn main() {
|
||
//! rocket::ignite()
|
||
//! .mount(
|
||
//! "/",
|
||
//! routes![
|
||
//! borrowed,
|
||
//! response,
|
||
//! ],
|
||
//! )
|
||
//! .mount("/", rocket_cors::catch_all_options_routes()) // mount the catch all routes
|
||
//! .manage(cors_options())
|
||
//! .launch();
|
||
//! }
|
||
//! ```
|
||
|
||
#![allow(
|
||
legacy_directory_ownership,
|
||
missing_copy_implementations,
|
||
missing_debug_implementations,
|
||
unknown_lints,
|
||
unsafe_code,
|
||
)]
|
||
#![deny(
|
||
const_err,
|
||
dead_code,
|
||
deprecated,
|
||
exceeding_bitshifts,
|
||
fat_ptr_transmutes,
|
||
improper_ctypes,
|
||
missing_docs,
|
||
mutable_transmutes,
|
||
no_mangle_const_items,
|
||
non_camel_case_types,
|
||
non_shorthand_field_patterns,
|
||
non_upper_case_globals,
|
||
overflowing_literals,
|
||
path_statements,
|
||
plugin_as_library,
|
||
private_no_mangle_fns,
|
||
private_no_mangle_statics,
|
||
stable_features,
|
||
trivial_casts,
|
||
trivial_numeric_casts,
|
||
unconditional_recursion,
|
||
unknown_crate_types,
|
||
unreachable_code,
|
||
unused_allocation,
|
||
unused_assignments,
|
||
unused_attributes,
|
||
unused_comparisons,
|
||
unused_extern_crates,
|
||
unused_features,
|
||
unused_imports,
|
||
unused_import_braces,
|
||
unused_qualifications,
|
||
unused_must_use,
|
||
unused_mut,
|
||
unused_parens,
|
||
unused_results,
|
||
unused_unsafe,
|
||
unused_variables,
|
||
variant_size_differences,
|
||
warnings,
|
||
while_true,
|
||
)]
|
||
|
||
#![cfg_attr(test, feature(plugin))]
|
||
#![cfg_attr(test, plugin(rocket_codegen))]
|
||
#![doc(test(attr(allow(unused_variables), deny(warnings))))]
|
||
|
||
#[macro_use]
|
||
extern crate log;
|
||
#[macro_use]
|
||
extern crate rocket;
|
||
extern crate serde;
|
||
#[macro_use]
|
||
extern crate serde_derive;
|
||
extern crate unicase;
|
||
extern crate unicase_serde;
|
||
extern crate url;
|
||
extern crate url_serde;
|
||
|
||
#[cfg(test)]
|
||
extern crate hyper;
|
||
#[cfg(test)]
|
||
extern crate serde_test;
|
||
#[cfg(test)]
|
||
extern crate serde_json;
|
||
|
||
#[cfg(test)]
|
||
#[macro_use]
|
||
mod test_macros;
|
||
mod fairing;
|
||
|
||
pub mod headers;
|
||
|
||
use std::borrow::Cow;
|
||
use std::collections::{HashSet, HashMap};
|
||
use std::error;
|
||
use std::fmt;
|
||
use std::marker::PhantomData;
|
||
use std::ops::Deref;
|
||
use std::str::FromStr;
|
||
|
||
use rocket::{Outcome, State};
|
||
use rocket::http::{self, Status};
|
||
use rocket::request::{Request, FromRequest};
|
||
use rocket::response;
|
||
use serde::{Serialize, Deserialize};
|
||
|
||
use headers::{HeaderFieldName, HeaderFieldNamesSet, Origin, AccessControlRequestHeaders,
|
||
AccessControlRequestMethod, Url};
|
||
|
||
/// Errors during operations
|
||
///
|
||
/// This enum implements `rocket::response::Responder` which will return an appropriate status code
|
||
/// while printing out the error in the console.
|
||
/// Because these errors are usually the result of an error while trying to respond to a CORS
|
||
/// request, CORS headers cannot be added to the response and your applications requesting CORS
|
||
/// will not be able to see the status code.
|
||
#[derive(Debug)]
|
||
pub enum Error {
|
||
/// The HTTP request header `Origin` is required but was not provided
|
||
MissingOrigin,
|
||
/// The HTTP request header `Origin` could not be parsed correctly.
|
||
BadOrigin(url::ParseError),
|
||
/// The request header `Access-Control-Request-Method` is required but is missing
|
||
MissingRequestMethod,
|
||
/// The request header `Access-Control-Request-Method` has an invalid value
|
||
BadRequestMethod(rocket::Error),
|
||
/// The request header `Access-Control-Request-Headers` is required but is missing.
|
||
MissingRequestHeaders,
|
||
/// Origin is not allowed to make this request
|
||
OriginNotAllowed,
|
||
/// Requested method is not allowed
|
||
MethodNotAllowed,
|
||
/// One or more headers requested are not allowed
|
||
HeadersNotAllowed,
|
||
/// Credentials are allowed, but the Origin is set to "*". This is not allowed by W3C
|
||
///
|
||
/// This is a misconfiguration. Check the docuemntation for `Cors`.
|
||
CredentialsWithWildcardOrigin,
|
||
/// A CORS Request Guard was used, but no CORS Options was available in Rocket's state
|
||
///
|
||
/// This is a misconfiguration. Use `Rocket::manage` to add a CORS options to managed state.
|
||
MissingCorsInRocketState,
|
||
/// The `on_response` handler of Fairing could not find the injected header from the Request.
|
||
/// Either some other fairing has removed it, or this is a bug.
|
||
MissingInjectedHeader,
|
||
/// The `on_response` handler of Fairing found an unknown injected header value from the
|
||
/// Request. Either some other fairing has modified it, or this is a bug.
|
||
UnknownInjectedHeader,
|
||
}
|
||
|
||
impl Error {
|
||
fn status(&self) -> Status {
|
||
match *self {
|
||
Error::MissingOrigin | Error::OriginNotAllowed | Error::MethodNotAllowed |
|
||
Error::HeadersNotAllowed => Status::Forbidden,
|
||
Error::CredentialsWithWildcardOrigin |
|
||
Error::MissingCorsInRocketState |
|
||
Error::MissingInjectedHeader |
|
||
Error::UnknownInjectedHeader => Status::InternalServerError,
|
||
_ => Status::BadRequest,
|
||
}
|
||
}
|
||
}
|
||
|
||
impl error::Error for Error {
|
||
fn description(&self) -> &str {
|
||
match *self {
|
||
Error::MissingOrigin => "The request header `Origin` is required but is missing",
|
||
Error::BadOrigin(_) => "The request header `Origin` contains an invalid URL",
|
||
Error::MissingRequestMethod => {
|
||
"The request header `Access-Control-Request-Method` \
|
||
is required but is missing"
|
||
}
|
||
Error::BadRequestMethod(_) => {
|
||
"The request header `Access-Control-Request-Method` has an invalid value"
|
||
}
|
||
Error::MissingRequestHeaders => {
|
||
"The request header `Access-Control-Request-Headers` \
|
||
is required but is missing"
|
||
}
|
||
Error::OriginNotAllowed => "Origin is not allowed to request",
|
||
Error::MethodNotAllowed => "Method is not allowed",
|
||
Error::HeadersNotAllowed => "Headers are not allowed",
|
||
Error::CredentialsWithWildcardOrigin => {
|
||
"Credentials are allowed, but the Origin is set to \"*\". \
|
||
This is not allowed by W3C"
|
||
}
|
||
Error::MissingCorsInRocketState => {
|
||
"A CORS Request Guard was used, but no CORS Options was available in Rocket's state"
|
||
}
|
||
Error::MissingInjectedHeader => {
|
||
"The `on_response` handler of Fairing could not find the injected header from the \
|
||
Request. Either some other fairing has removed it, or this is a bug."
|
||
}
|
||
Error::UnknownInjectedHeader => {
|
||
"The `on_response` handler of Fairing found an unknown injected header value from \
|
||
the Request. Either some other fairing has modified it, or this is a bug."
|
||
}
|
||
}
|
||
}
|
||
|
||
fn cause(&self) -> Option<&error::Error> {
|
||
match *self {
|
||
Error::BadOrigin(ref e) => Some(e),
|
||
_ => Some(self),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl fmt::Display for Error {
|
||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||
match *self {
|
||
Error::BadOrigin(ref e) => fmt::Display::fmt(e, f),
|
||
Error::BadRequestMethod(ref e) => fmt::Debug::fmt(e, f),
|
||
_ => write!(f, "{}", error::Error::description(self)),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<'r> response::Responder<'r> for Error {
|
||
fn respond_to(self, _: &Request) -> Result<response::Response<'r>, Status> {
|
||
error_!("CORS Error: {}", self);
|
||
Err(self.status())
|
||
}
|
||
}
|
||
|
||
/// An enum signifying that some of type T is allowed, or `All` (everything is allowed).
|
||
///
|
||
/// `Default` is implemented for this enum and is `All`.
|
||
///
|
||
/// This enum is serialized and deserialized
|
||
/// ["Externally tagged"](https://serde.rs/enum-representations.html)
|
||
#[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq)]
|
||
pub enum AllOrSome<T> {
|
||
/// Everything is allowed. Usually equivalent to the "*" value.
|
||
All,
|
||
/// Only some of `T` is allowed
|
||
Some(T),
|
||
}
|
||
|
||
impl<T> Default for AllOrSome<T> {
|
||
fn default() -> Self {
|
||
AllOrSome::All
|
||
}
|
||
}
|
||
|
||
impl<T> AllOrSome<T> {
|
||
/// Returns whether this is an `All` variant
|
||
pub fn is_all(&self) -> bool {
|
||
match *self {
|
||
AllOrSome::All => true,
|
||
AllOrSome::Some(_) => false,
|
||
}
|
||
}
|
||
|
||
/// Returns whether this is a `Some` variant
|
||
pub fn is_some(&self) -> bool {
|
||
!self.is_all()
|
||
}
|
||
}
|
||
|
||
impl AllOrSome<HashSet<Url>> {
|
||
#[deprecated(since = "0.1.3", note = "please use `AllowedOrigins::Some` instead")]
|
||
/// New `AllOrSome` from a list of URL strings.
|
||
/// Returns a tuple where the first element is the struct `AllOrSome`,
|
||
/// and the second element
|
||
/// is a map of strings which failed to parse into URLs and their associated parse errors.
|
||
pub fn new_from_str_list(urls: &[&str]) -> (Self, HashMap<String, url::ParseError>) {
|
||
AllowedOrigins::some(urls)
|
||
}
|
||
}
|
||
|
||
/// A wrapper type around `rocket::http::Method` to support serialization and deserialization
|
||
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
|
||
pub struct Method(http::Method);
|
||
|
||
impl FromStr for Method {
|
||
type Err = rocket::Error;
|
||
|
||
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
||
let method = http::Method::from_str(s)?;
|
||
Ok(Method(method))
|
||
}
|
||
}
|
||
|
||
impl Deref for Method {
|
||
type Target = http::Method;
|
||
|
||
fn deref(&self) -> &Self::Target {
|
||
&self.0
|
||
}
|
||
}
|
||
|
||
impl From<http::Method> for Method {
|
||
fn from(method: http::Method) -> Self {
|
||
Method(method)
|
||
}
|
||
}
|
||
|
||
impl fmt::Display for Method {
|
||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||
fmt::Display::fmt(&self.0, f)
|
||
}
|
||
}
|
||
|
||
impl Serialize for Method {
|
||
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
|
||
where
|
||
S: serde::Serializer,
|
||
{
|
||
serializer.serialize_str(self.as_str())
|
||
}
|
||
}
|
||
|
||
impl<'de> Deserialize<'de> for Method {
|
||
fn deserialize<D>(deserializer: D) -> Result<Method, D::Error>
|
||
where
|
||
D: serde::Deserializer<'de>,
|
||
{
|
||
use serde::de::{self, Visitor};
|
||
|
||
struct MethodVisitor;
|
||
impl<'de> Visitor<'de> for MethodVisitor {
|
||
type Value = Method;
|
||
|
||
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
|
||
formatter.write_str("a string containing a HTTP Verb")
|
||
}
|
||
|
||
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
|
||
where
|
||
E: de::Error,
|
||
{
|
||
match Self::Value::from_str(s) {
|
||
Ok(value) => Ok(value),
|
||
Err(e) => Err(de::Error::custom(format!("{:?}", e))),
|
||
}
|
||
}
|
||
}
|
||
|
||
deserializer.deserialize_string(MethodVisitor)
|
||
}
|
||
}
|
||
|
||
/// A list of allowed origins. Either Some origins are allowed, or all origins are allowed.
|
||
///
|
||
/// # Examples
|
||
/// ```rust
|
||
/// use rocket_cors::AllowedOrigins;
|
||
///
|
||
/// let all_origins = AllowedOrigins::all();
|
||
/// let (some_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
|
||
/// assert!(failed_origins.is_empty());
|
||
/// ```
|
||
pub type AllowedOrigins = AllOrSome<HashSet<Url>>;
|
||
|
||
impl AllowedOrigins {
|
||
/// Allows some origins
|
||
///
|
||
/// Returns a tuple where the first element is the struct `AllowedOrigins`,
|
||
/// and the second element
|
||
/// is a map of strings which failed to parse into URLs and their associated parse errors.
|
||
pub fn some(urls: &[&str]) -> (Self, HashMap<String, url::ParseError>) {
|
||
let (ok_set, error_map): (Vec<_>, Vec<_>) = urls.iter()
|
||
.map(|s| (s.to_string(), Url::from_str(s)))
|
||
.partition(|&(_, ref r)| r.is_ok());
|
||
|
||
let error_map = error_map
|
||
.into_iter()
|
||
.map(|(s, r)| (s.to_string(), r.unwrap_err()))
|
||
.collect();
|
||
|
||
let ok_set = ok_set.into_iter().map(|(_, r)| r.unwrap()).collect();
|
||
|
||
(AllOrSome::Some(ok_set), error_map)
|
||
}
|
||
|
||
/// Allows all origins
|
||
pub fn all() -> Self {
|
||
AllOrSome::All
|
||
}
|
||
}
|
||
|
||
/// A list of allowed methods
|
||
///
|
||
/// The [list](https://api.rocket.rs/rocket/http/enum.Method.html)
|
||
/// of methods is whatever is supported by Rocket.
|
||
///
|
||
/// # Example
|
||
/// ```rust
|
||
/// use std::str::FromStr;
|
||
/// use rocket_cors::AllowedMethods;
|
||
///
|
||
/// let allowed_methods: AllowedMethods = ["Get", "Post", "Delete"]
|
||
/// .iter()
|
||
/// .map(|s| FromStr::from_str(s).unwrap())
|
||
/// .collect();
|
||
/// ```
|
||
pub type AllowedMethods = HashSet<Method>;
|
||
|
||
/// A list of allowed headers
|
||
///
|
||
/// # Examples
|
||
/// ```rust
|
||
/// use rocket_cors::AllowedHeaders;
|
||
///
|
||
/// let all_headers = AllowedHeaders::all();
|
||
/// let some_headers = AllowedHeaders::some(&["Authorization", "Accept"]);
|
||
/// ```
|
||
pub type AllowedHeaders = AllOrSome<HashSet<HeaderFieldName>>;
|
||
|
||
impl AllowedHeaders {
|
||
/// Allow some headers
|
||
pub fn some(headers: &[&str]) -> Self {
|
||
AllOrSome::Some(headers.iter().map(|s| s.to_string().into()).collect())
|
||
}
|
||
|
||
/// Allows all headers
|
||
pub fn all() -> Self {
|
||
AllOrSome::All
|
||
}
|
||
}
|
||
|
||
/// Response generator and [Fairing](https://rocket.rs/guide/fairings/) for CORS
|
||
///
|
||
/// This struct can be as Fairing or in an ad-hoc manner to generate CORS response. See the
|
||
/// documentation at the [crate root](index.html) for usage information.
|
||
///
|
||
/// You create a new copy of this struct by defining the configurations in the fields below.
|
||
/// This struct can also be deserialized by serde.
|
||
///
|
||
/// [`Default`](https://doc.rust-lang.org/std/default/trait.Default.html) is implemented for this
|
||
/// struct. The default for each field is described in the docuementation for the field.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// You can run an example from the repository to demonstrate the JSON serialization with
|
||
/// `cargo run --example json`.
|
||
///
|
||
/// ## Pure default
|
||
/// ```rust
|
||
/// let default = rocket_cors::Cors::default();
|
||
/// ```
|
||
///
|
||
/// ## JSON Examples
|
||
/// ### Default
|
||
///
|
||
/// ```json
|
||
/// {
|
||
/// "allowed_origins": "All",
|
||
/// "allowed_methods": [
|
||
/// "POST",
|
||
/// "PATCH",
|
||
/// "PUT",
|
||
/// "DELETE",
|
||
/// "HEAD",
|
||
/// "OPTIONS",
|
||
/// "GET"
|
||
/// ],
|
||
/// "allowed_headers": "All",
|
||
/// "allow_credentials": false,
|
||
/// "expose_headers": [],
|
||
/// "max_age": null,
|
||
/// "send_wildcard": false,
|
||
/// "fairing_route_base": "/cors"
|
||
/// }
|
||
/// ```
|
||
/// ### Defined
|
||
/// ```json
|
||
/// {
|
||
/// "allowed_origins": {
|
||
/// "Some": [
|
||
/// "https://www.acme.com/"
|
||
/// ]
|
||
/// },
|
||
/// "allowed_methods": [
|
||
/// "POST",
|
||
/// "DELETE",
|
||
/// "GET"
|
||
/// ],
|
||
/// "allowed_headers": {
|
||
/// "Some": [
|
||
/// "Accept",
|
||
/// "Authorization"
|
||
/// ]
|
||
/// },
|
||
/// "allow_credentials": true,
|
||
/// "expose_headers": [
|
||
/// "Content-Type",
|
||
/// "X-Custom"
|
||
/// ],
|
||
/// "max_age": 42,
|
||
/// "send_wildcard": false,
|
||
/// "fairing_route_base": "/mycors"
|
||
/// }
|
||
///
|
||
/// ```
|
||
#[derive(Serialize, Deserialize, Eq, PartialEq, Clone, Debug)]
|
||
pub struct Cors {
|
||
/// Origins that are allowed to make requests.
|
||
/// Will be verified against the `Origin` request header.
|
||
///
|
||
/// When `All` is set, and `send_wildcard` is set, "*" will be sent in
|
||
/// the `Access-Control-Allow-Origin` response header. Otherwise, the client's `Origin` request
|
||
/// header will be echoed back in the `Access-Control-Allow-Origin` response header.
|
||
///
|
||
/// When `Some` is set, the client's `Origin` request header will be checked in a
|
||
/// case-sensitive manner.
|
||
///
|
||
/// This is the `list of origins` in the
|
||
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
|
||
///
|
||
/// Defaults to `All`.
|
||
///
|
||
/// ```
|
||
#[serde(default)]
|
||
pub allowed_origins: AllowedOrigins,
|
||
/// The list of methods which the allowed origins are allowed to access for
|
||
/// non-simple requests.
|
||
///
|
||
/// This is the `list of methods` in the
|
||
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
|
||
///
|
||
/// Defaults to `[GET, HEAD, POST, OPTIONS, PUT, PATCH, DELETE]`
|
||
#[serde(default = "Cors::default_allowed_methods")]
|
||
pub allowed_methods: AllowedMethods,
|
||
/// The list of header field names which can be used when this resource is accessed by allowed
|
||
/// origins.
|
||
///
|
||
/// If `All` is set, whatever is requested by the client in `Access-Control-Request-Headers`
|
||
/// will be echoed back in the `Access-Control-Allow-Headers` header.
|
||
///
|
||
/// This is the `list of headers` in the
|
||
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
|
||
///
|
||
/// Defaults to `All`.
|
||
#[serde(default)]
|
||
pub allowed_headers: AllOrSome<HashSet<HeaderFieldName>>,
|
||
/// Allows users to make authenticated requests.
|
||
/// If true, injects the `Access-Control-Allow-Credentials` header in responses.
|
||
/// This allows cookies and credentials to be submitted across domains.
|
||
///
|
||
/// This **CANNOT** be used in conjunction with `allowed_origins` set to `All` and
|
||
/// `send_wildcard` set to `true`. Depending on the mode of usage, this will either result
|
||
/// in an `Error::CredentialsWithWildcardOrigin` error during Rocket launch or runtime.
|
||
///
|
||
/// Defaults to `false`.
|
||
#[serde(default)]
|
||
pub allow_credentials: bool,
|
||
/// The list of headers which are safe to expose to the API of a CORS API specification.
|
||
/// This corresponds to the `Access-Control-Expose-Headers` responde header.
|
||
///
|
||
/// This is the `list of exposed headers` in the
|
||
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
|
||
///
|
||
/// This defaults to an empty set.
|
||
#[serde(default)]
|
||
pub expose_headers: HashSet<String>,
|
||
/// The maximum time for which this CORS request maybe cached. This value is set as the
|
||
/// `Access-Control-Max-Age` header.
|
||
///
|
||
/// This defaults to `None` (unset).
|
||
#[serde(default)]
|
||
pub max_age: Option<usize>,
|
||
/// If true, and the `allowed_origins` parameter is `All`, a wildcard
|
||
/// `Access-Control-Allow-Origin` response header is sent, rather than the request’s
|
||
/// `Origin` header.
|
||
///
|
||
/// This is the `supports credentials flag` in the
|
||
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
|
||
///
|
||
/// This **CANNOT** be used in conjunction with `allowed_origins` set to `All` and
|
||
/// `allow_credentials` set to `true`. Depending on the mode of usage, this will either result
|
||
/// in an `Error::CredentialsWithWildcardOrigin` error during Rocket launch or runtime.
|
||
///
|
||
/// Defaults to `false`.
|
||
#[serde(default)]
|
||
pub send_wildcard: bool,
|
||
/// When used as Fairing, Cors will need to redirect failed CORS checks to a custom route to
|
||
/// be mounted by the fairing. Specify the base the route so that it doesn't clash with any
|
||
/// of your existing routes.
|
||
///
|
||
/// Defaults to "/cors"
|
||
#[serde(default = "Cors::default_fairing_route_base")]
|
||
pub fairing_route_base: String,
|
||
}
|
||
|
||
impl Default for Cors {
|
||
fn default() -> Self {
|
||
Self {
|
||
allowed_origins: Default::default(),
|
||
allowed_methods: Self::default_allowed_methods(),
|
||
allowed_headers: Default::default(),
|
||
allow_credentials: Default::default(),
|
||
expose_headers: Default::default(),
|
||
max_age: Default::default(),
|
||
send_wildcard: Default::default(),
|
||
fairing_route_base: Self::default_fairing_route_base(),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl Cors {
|
||
fn default_allowed_methods() -> HashSet<Method> {
|
||
use rocket::http::Method;
|
||
|
||
vec![
|
||
Method::Get,
|
||
Method::Head,
|
||
Method::Post,
|
||
Method::Options,
|
||
Method::Put,
|
||
Method::Patch,
|
||
Method::Delete,
|
||
].into_iter()
|
||
.map(From::from)
|
||
.collect()
|
||
}
|
||
|
||
fn default_fairing_route_base() -> String {
|
||
"/cors".to_string()
|
||
}
|
||
|
||
/// Validates if any of the settings are disallowed or incorrect
|
||
///
|
||
/// This is run during initial Fairing attachment
|
||
pub fn validate(&self) -> Result<(), Error> {
|
||
if self.allowed_origins.is_all() && self.send_wildcard && self.allow_credentials {
|
||
Err(Error::CredentialsWithWildcardOrigin)?;
|
||
}
|
||
|
||
Ok(())
|
||
}
|
||
|
||
/// Manually respond to a request with CORS checks and headers using an Owned `Cors`.
|
||
///
|
||
/// Use this variant when your `Cors` struct will not live at least as long as the whole `'r`
|
||
/// lifetime of the request.
|
||
///
|
||
/// After the CORS checks are done, the passed in handler closure will be run to generate a
|
||
/// final response. You will have to merge your response with the `Guard` that you have been
|
||
/// passed in to include the CORS headers.
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
pub fn respond_owned<'r, F, R>(self, handler: F) -> Result<ManualResponder<'r, F, R>, Error>
|
||
where
|
||
F: FnOnce(Guard<'r>) -> R + 'r,
|
||
R: response::Responder<'r>,
|
||
{
|
||
self.validate()?;
|
||
Ok(ManualResponder::new(Cow::Owned(self), handler))
|
||
}
|
||
|
||
/// Manually respond to a request with CORS checks and headers using a borrowed `Cors`.
|
||
///
|
||
/// Use this variant when your `Cors` struct will live at least as long as the whole `'r`
|
||
/// lifetime of the request. If you are getting your `Cors` from Rocket's state, you will have
|
||
/// to use the [`inner` function](https://api.rocket.rs/rocket/struct.State.html#method.inner)
|
||
/// to get a longer borrowed lifetime.
|
||
///
|
||
/// After the CORS checks are done, the passed in handler closure will be run to generate a
|
||
/// final response. You will have to merge your response with the `Guard` that you have been
|
||
/// passed in to include the CORS headers.
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
pub fn respond_borrowed<'r, F, R>(
|
||
&'r self,
|
||
handler: F,
|
||
) -> Result<ManualResponder<'r, F, R>, Error>
|
||
where
|
||
F: FnOnce(Guard<'r>) -> R + 'r,
|
||
R: response::Responder<'r>,
|
||
{
|
||
self.validate()?;
|
||
Ok(ManualResponder::new(Cow::Borrowed(self), handler))
|
||
}
|
||
}
|
||
|
||
|
||
/// A CORS Response which provides the following CORS headers:
|
||
///
|
||
/// - `Access-Control-Allow-Origin`
|
||
/// - `Access-Control-Expose-Headers`
|
||
/// - `Access-Control-Max-Age`
|
||
/// - `Access-Control-Allow-Credentials`
|
||
/// - `Access-Control-Allow-Methods`
|
||
/// - `Access-Control-Allow-Headers`
|
||
/// - `Vary`
|
||
///
|
||
/// You can get this struct by using `Cors::validate_request` in an ad-hoc manner.
|
||
#[doc(hidden)]
|
||
#[derive(Eq, PartialEq, Debug)]
|
||
pub struct Response {
|
||
allow_origin: Option<AllOrSome<Url>>,
|
||
allow_methods: HashSet<Method>,
|
||
allow_headers: HeaderFieldNamesSet,
|
||
allow_credentials: bool,
|
||
expose_headers: HeaderFieldNamesSet,
|
||
max_age: Option<usize>,
|
||
vary_origin: bool,
|
||
}
|
||
|
||
impl Response {
|
||
/// Create an empty `Response`
|
||
fn new() -> Self {
|
||
Self {
|
||
allow_origin: None,
|
||
allow_headers: HashSet::new(),
|
||
allow_methods: HashSet::new(),
|
||
allow_credentials: false,
|
||
expose_headers: HashSet::new(),
|
||
max_age: None,
|
||
vary_origin: false,
|
||
}
|
||
}
|
||
|
||
/// Consumes the `Response` and return an altered response with origin and `vary_origin` set
|
||
fn origin(mut self, origin: &Url, vary_origin: bool) -> Self {
|
||
self.allow_origin = Some(AllOrSome::Some(origin.clone()));
|
||
self.vary_origin = vary_origin;
|
||
self
|
||
}
|
||
|
||
/// Consumes the `Response` and return an altered response with origin set to "*"
|
||
fn any(mut self) -> Self {
|
||
self.allow_origin = Some(AllOrSome::All);
|
||
self
|
||
}
|
||
|
||
/// Consumes the Response and set credentials
|
||
fn credentials(mut self, value: bool) -> Self {
|
||
self.allow_credentials = value;
|
||
self
|
||
}
|
||
|
||
/// Consumes the CORS, set expose_headers to
|
||
/// passed headers and returns changed CORS
|
||
fn exposed_headers(mut self, headers: &[&str]) -> Self {
|
||
self.expose_headers = headers.into_iter().map(|s| s.to_string().into()).collect();
|
||
self
|
||
}
|
||
|
||
/// Consumes the CORS, set max_age to
|
||
/// passed value and returns changed CORS
|
||
fn max_age(mut self, value: Option<usize>) -> Self {
|
||
self.max_age = value;
|
||
self
|
||
}
|
||
|
||
/// Consumes the CORS, set allow_methods to
|
||
/// passed methods and returns changed CORS
|
||
fn methods(mut self, methods: &HashSet<Method>) -> Self {
|
||
self.allow_methods = methods.clone();
|
||
self
|
||
}
|
||
|
||
/// Consumes the CORS, set allow_headers to
|
||
/// passed headers and returns changed CORS
|
||
fn headers(mut self, headers: &[&str]) -> Self {
|
||
self.allow_headers = headers.into_iter().map(|s| s.to_string().into()).collect();
|
||
self
|
||
}
|
||
|
||
/// Consumes the `Response` and return a `Responder` that wraps a
|
||
/// provided `rocket:response::Responder` with CORS headers
|
||
pub fn responder<'r, R: response::Responder<'r>>(self, responder: R) -> Responder<'r, R> {
|
||
Responder::new(responder, self)
|
||
}
|
||
|
||
/// Merge a `rocket::Response` with this CORS response. This is usually used in the final step
|
||
/// of a route to return a value for the route.
|
||
///
|
||
/// This will overwrite any existing CORS headers
|
||
pub fn response<'r>(&self, base: response::Response<'r>) -> response::Response<'r> {
|
||
let mut response = response::Response::build_from(base).finalize();
|
||
self.merge(&mut response);
|
||
response
|
||
}
|
||
|
||
/// Merge CORS headers with an existing `rocket::Response`.
|
||
///
|
||
/// This will overwrite any existing CORS headers
|
||
fn merge(&self, response: &mut response::Response) {
|
||
// TODO: We should be able to remove this
|
||
let origin = match self.allow_origin {
|
||
None => {
|
||
// This is not a CORS response
|
||
return;
|
||
}
|
||
Some(ref origin) => origin,
|
||
};
|
||
|
||
let origin = match *origin {
|
||
AllOrSome::All => "*".to_string(),
|
||
AllOrSome::Some(ref origin) => origin.origin().unicode_serialization(),
|
||
};
|
||
|
||
response.set_raw_header("Access-Control-Allow-Origin", origin);
|
||
|
||
if self.allow_credentials {
|
||
response.set_raw_header("Access-Control-Allow-Credentials", "true");
|
||
} else {
|
||
response.remove_header("Access-Control-Allow-Credentials");
|
||
}
|
||
|
||
if !self.expose_headers.is_empty() {
|
||
let headers: Vec<String> = self.expose_headers
|
||
.iter()
|
||
.map(|s| s.deref().to_string())
|
||
.collect();
|
||
let headers = headers.join(", ");
|
||
|
||
response.set_raw_header("Access-Control-Expose-Headers", headers);
|
||
} else {
|
||
response.remove_header("Access-Control-Expose-Headers");
|
||
}
|
||
|
||
if !self.allow_headers.is_empty() {
|
||
let headers: Vec<String> = self.allow_headers
|
||
.iter()
|
||
.map(|s| s.deref().to_string())
|
||
.collect();
|
||
let headers = headers.join(", ");
|
||
|
||
response.set_raw_header("Access-Control-Allow-Headers", headers);
|
||
} else {
|
||
response.remove_header("Access-Control-Allow-Headers");
|
||
}
|
||
|
||
if !self.allow_methods.is_empty() {
|
||
let methods: Vec<_> = self.allow_methods.iter().map(|m| m.as_str()).collect();
|
||
let methods = methods.join(", ");
|
||
|
||
response.set_raw_header("Access-Control-Allow-Methods", methods);
|
||
} else {
|
||
response.remove_header("Access-Control-Allow-Methods");
|
||
}
|
||
|
||
if self.max_age.is_some() {
|
||
let max_age = self.max_age.unwrap();
|
||
response.set_raw_header("Access-Control-Max-Age", max_age.to_string());
|
||
} else {
|
||
response.remove_header("Access-Control-Max-Age");
|
||
}
|
||
|
||
if self.vary_origin {
|
||
response.set_raw_header("Vary", "Origin");
|
||
} else {
|
||
response.remove_header("Vary");
|
||
}
|
||
}
|
||
|
||
/// Validate and create a new CORS Response from a request and settings
|
||
pub fn validate_and_build<'a, 'r>(
|
||
options: &'a Cors,
|
||
request: &'a Request<'r>,
|
||
) -> Result<Self, Error> {
|
||
validate_and_build(options, request)
|
||
}
|
||
}
|
||
|
||
|
||
/// A [request guard](https://rocket.rs/guide/requests/#request-guards) to check CORS headers
|
||
/// before a route is run. Will not execute the route if checks fail.
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
///
|
||
/// You should not wrap this in an
|
||
/// `Option` or `Result` because the guard will let non-CORS requests through and will take over
|
||
/// error handling in case of errors.
|
||
/// In essence, this is just a wrapper around `Response` with a `'r` borrowed lifetime so users
|
||
/// don't have to keep specifying the lifetimes in their routes
|
||
pub struct Guard<'r> {
|
||
response: Response,
|
||
marker: PhantomData<&'r Response>,
|
||
}
|
||
|
||
impl<'r> Guard<'r> {
|
||
fn new(response: Response) -> Self {
|
||
Self {
|
||
response,
|
||
marker: PhantomData,
|
||
}
|
||
}
|
||
|
||
/// Consumes the Guard and return a `Responder` that wraps a
|
||
/// provided `rocket:response::Responder` with CORS headers
|
||
pub fn responder<R: response::Responder<'r>>(self, responder: R) -> Responder<'r, R> {
|
||
self.response.responder(responder)
|
||
}
|
||
|
||
/// Merge a `rocket::Response` with this CORS Guard. This is usually used in the final step
|
||
/// of a route to return a value for the route.
|
||
///
|
||
/// This will overwrite any existing CORS headers
|
||
pub fn response(&self, base: response::Response<'r>) -> response::Response<'r> {
|
||
self.response.response(base)
|
||
}
|
||
}
|
||
|
||
impl<'a, 'r> FromRequest<'a, 'r> for Guard<'r> {
|
||
type Error = Error;
|
||
|
||
fn from_request(request: &'a Request<'r>) -> rocket::request::Outcome<Self, Self::Error> {
|
||
let options = match request.guard::<State<Cors>>() {
|
||
Outcome::Success(options) => options,
|
||
_ => {
|
||
let error = Error::MissingCorsInRocketState;
|
||
return Outcome::Failure((error.status(), error));
|
||
}
|
||
};
|
||
|
||
match Response::validate_and_build(&options, request) {
|
||
Ok(response) => Outcome::Success(Self::new(response)),
|
||
Err(error) => Outcome::Failure((error.status(), error)),
|
||
}
|
||
}
|
||
}
|
||
|
||
/// A [`Responder`](https://rocket.rs/guide/responses/#responder) which will simply wraps another
|
||
/// `Responder` with CORS headers.
|
||
///
|
||
/// The following CORS headers will be overwritten:
|
||
///
|
||
/// - `Access-Control-Allow-Origin`
|
||
/// - `Access-Control-Expose-Headers`
|
||
/// - `Access-Control-Max-Age`
|
||
/// - `Access-Control-Allow-Credentials`
|
||
/// - `Access-Control-Allow-Methods`
|
||
/// - `Access-Control-Allow-Headers`
|
||
/// - `Vary`
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
#[derive(Debug)]
|
||
pub struct Responder<'r, R> {
|
||
responder: R,
|
||
cors_response: Response,
|
||
marker: PhantomData<response::Responder<'r>>,
|
||
}
|
||
|
||
impl<'r, R: response::Responder<'r>> Responder<'r, R> {
|
||
fn new(responder: R, cors_response: Response) -> Self {
|
||
Self {
|
||
responder,
|
||
cors_response,
|
||
marker: PhantomData,
|
||
}
|
||
}
|
||
|
||
/// Respond to a request
|
||
fn respond(self, request: &Request) -> response::Result<'r> {
|
||
let mut response = self.responder.respond_to(request)?; // handle status errors?
|
||
self.cors_response.merge(&mut response);
|
||
Ok(response)
|
||
}
|
||
}
|
||
|
||
impl<'r, R: response::Responder<'r>> response::Responder<'r> for Responder<'r, R> {
|
||
fn respond_to(self, request: &Request) -> response::Result<'r> {
|
||
self.respond(request)
|
||
}
|
||
}
|
||
|
||
/// A Manual Responder used in the "truly manual" mode of operation.
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
pub struct ManualResponder<'r, F, R> {
|
||
options: Cow<'r, Cors>,
|
||
handler: F,
|
||
marker: PhantomData<R>,
|
||
}
|
||
|
||
impl<'r, F, R> ManualResponder<'r, F, R>
|
||
where
|
||
F: FnOnce(Guard<'r>) -> R + 'r,
|
||
R: response::Responder<'r>,
|
||
{
|
||
/// Create a new manual responder by passing in either a borrowed or owned `Cors` option.
|
||
///
|
||
/// A borrowed `Cors` option must live for the entirety of the `'r` lifetime which is the
|
||
/// lifetime of the entire Rocket request.
|
||
fn new(options: Cow<'r, Cors>, handler: F) -> Self {
|
||
let marker = PhantomData;
|
||
Self {
|
||
options,
|
||
handler,
|
||
marker,
|
||
}
|
||
}
|
||
|
||
fn build_guard(&self, request: &Request) -> Result<Guard<'r>, Error> {
|
||
let response = Response::validate_and_build(&self.options, request)?;
|
||
Ok(Guard::new(response))
|
||
}
|
||
}
|
||
|
||
impl<'r, F, R> response::Responder<'r> for ManualResponder<'r, F, R>
|
||
where
|
||
F: FnOnce(Guard<'r>) -> R + 'r,
|
||
R: response::Responder<'r>,
|
||
{
|
||
fn respond_to(self, request: &Request) -> response::Result<'r> {
|
||
let guard = match self.build_guard(request) {
|
||
Ok(guard) => guard,
|
||
Err(err) => {
|
||
error_!("CORS error: {}", err);
|
||
return Err(err.status());
|
||
}
|
||
};
|
||
(self.handler)(guard).respond_to(request)
|
||
}
|
||
}
|
||
|
||
/// Result of CORS validation.
|
||
///
|
||
/// The variants hold enough information to build a response to the validation result
|
||
#[derive(Debug, Eq, PartialEq)]
|
||
enum ValidationResult {
|
||
/// Not a CORS request
|
||
None,
|
||
/// Successful preflight request
|
||
Preflight {
|
||
origin: Origin,
|
||
headers: Option<AccessControlRequestHeaders>,
|
||
},
|
||
/// Successful actual request
|
||
Request { origin: Origin },
|
||
}
|
||
|
||
/// Validates a request for CORS and returns a CORS Response
|
||
fn validate_and_build(options: &Cors, request: &Request) -> Result<Response, Error> {
|
||
let result = validate(options, request)?;
|
||
|
||
Ok(match result {
|
||
ValidationResult::None => Response::new(),
|
||
ValidationResult::Preflight { origin, headers } => {
|
||
preflight_response(options, origin, headers)
|
||
}
|
||
ValidationResult::Request { origin } => actual_request_response(options, origin),
|
||
})
|
||
}
|
||
|
||
/// Validate a CORS request
|
||
fn validate(options: &Cors, request: &Request) -> Result<ValidationResult, Error> {
|
||
// 1. If the Origin header is not present terminate this set of steps.
|
||
// The request is outside the scope of this specification.
|
||
let origin = origin(request)?;
|
||
let origin = match origin {
|
||
None => {
|
||
// Not a CORS request
|
||
return Ok(ValidationResult::None);
|
||
}
|
||
Some(origin) => origin,
|
||
};
|
||
|
||
// Check if the request verb is an OPTION or something else
|
||
match request.method() {
|
||
http::Method::Options => {
|
||
let method = request_method(request)?;
|
||
let headers = request_headers(request)?;
|
||
preflight_validate(options, &origin, &method, &headers)?;
|
||
Ok(ValidationResult::Preflight { origin, headers })
|
||
}
|
||
_ => {
|
||
actual_request_validate(options, &origin)?;
|
||
Ok(ValidationResult::Request { origin })
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Consumes the responder and based on the provided list of allowed origins,
|
||
/// check if the requested origin is allowed.
|
||
/// Useful for pre-flight and during requests
|
||
fn validate_origin(
|
||
origin: &Origin,
|
||
allowed_origins: &AllOrSome<HashSet<Url>>,
|
||
) -> Result<(), Error> {
|
||
match *allowed_origins {
|
||
// Always matching is acceptable since the list of origins can be unbounded.
|
||
AllOrSome::All => Ok(()),
|
||
AllOrSome::Some(ref allowed_origins) => {
|
||
allowed_origins
|
||
.get(origin)
|
||
.and_then(|_| Some(()))
|
||
.ok_or_else(|| Error::OriginNotAllowed)
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Validate allowed methods
|
||
fn validate_allowed_method(
|
||
method: &AccessControlRequestMethod,
|
||
allowed_methods: &HashSet<Method>,
|
||
) -> Result<(), Error> {
|
||
let &AccessControlRequestMethod(ref request_method) = method;
|
||
if !allowed_methods.iter().any(|m| m == request_method) {
|
||
Err(Error::MethodNotAllowed)?
|
||
}
|
||
|
||
// TODO: Subset to route? Or just the method requested for?
|
||
Ok(())
|
||
}
|
||
|
||
/// Validate allowed headers
|
||
fn validate_allowed_headers(
|
||
headers: &AccessControlRequestHeaders,
|
||
allowed_headers: &AllOrSome<HashSet<HeaderFieldName>>,
|
||
) -> Result<(), Error> {
|
||
let &AccessControlRequestHeaders(ref headers) = headers;
|
||
|
||
match *allowed_headers {
|
||
AllOrSome::All => Ok(()),
|
||
AllOrSome::Some(ref allowed_headers) => {
|
||
if !headers.is_empty() && !headers.is_subset(allowed_headers) {
|
||
Err(Error::HeadersNotAllowed)?
|
||
}
|
||
Ok(())
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Gets the `Origin` request header from the request
|
||
fn origin(request: &Request) -> Result<Option<Origin>, Error> {
|
||
match Origin::from_request(request) {
|
||
Outcome::Forward(()) => Ok(None),
|
||
Outcome::Success(origin) => Ok(Some(origin)),
|
||
Outcome::Failure((_, err)) => Err(err),
|
||
}
|
||
}
|
||
|
||
/// Gets the `Access-Control-Request-Method` request header from the request
|
||
fn request_method(request: &Request) -> Result<Option<AccessControlRequestMethod>, Error> {
|
||
match AccessControlRequestMethod::from_request(request) {
|
||
Outcome::Forward(()) => Ok(None),
|
||
Outcome::Success(method) => Ok(Some(method)),
|
||
Outcome::Failure((_, err)) => Err(err),
|
||
}
|
||
}
|
||
|
||
/// Gets the `Access-Control-Request-Headers` request header from the request
|
||
fn request_headers(request: &Request) -> Result<Option<AccessControlRequestHeaders>, Error> {
|
||
match AccessControlRequestHeaders::from_request(request) {
|
||
Outcome::Forward(()) => Ok(None),
|
||
Outcome::Success(geaders) => Ok(Some(geaders)),
|
||
Outcome::Failure((_, err)) => Err(err),
|
||
}
|
||
}
|
||
|
||
/// Do pre-flight validation checks
|
||
///
|
||
/// This implementation references the
|
||
/// [W3C recommendation](https://www.w3.org/TR/cors/#resource-preflight-requests).
|
||
fn preflight_validate(
|
||
options: &Cors,
|
||
origin: &Origin,
|
||
method: &Option<AccessControlRequestMethod>,
|
||
headers: &Option<AccessControlRequestHeaders>,
|
||
) -> Result<(), Error> {
|
||
|
||
options.validate()?; // Fast-forward check for #7
|
||
|
||
// Note: All header parse failures are dealt with in the `FromRequest` trait implementation
|
||
|
||
// 2. If the value of the Origin header is not a case-sensitive match for any of the values
|
||
// in list of origins do not set any additional headers and terminate this set of steps.
|
||
validate_origin(&origin, &options.allowed_origins)?;
|
||
|
||
// 3. Let `method` be the value as result of parsing the Access-Control-Request-Method
|
||
// header.
|
||
// If there is no Access-Control-Request-Method header or if parsing failed,
|
||
// do not set any additional headers and terminate this set of steps.
|
||
// The request is outside the scope of this specification.
|
||
|
||
let method = method.as_ref().ok_or_else(|| Error::MissingRequestMethod)?;
|
||
|
||
// 4. Let header field-names be the values as result of parsing the
|
||
// Access-Control-Request-Headers headers.
|
||
// If there are no Access-Control-Request-Headers headers
|
||
// let header field-names be the empty list.
|
||
// If parsing failed do not set any additional headers and terminate this set of steps.
|
||
// The request is outside the scope of this specification.
|
||
|
||
// 5. If method is not a case-sensitive match for any of the values in list of methods
|
||
// do not set any additional headers and terminate this set of steps.
|
||
|
||
validate_allowed_method(method, &options.allowed_methods)?;
|
||
|
||
// 6. If any of the header field-names is not a ASCII case-insensitive match for any of the
|
||
// values in list of headers do not set any additional headers and terminate this set of
|
||
// steps.
|
||
|
||
if let &Some(ref headers) = headers {
|
||
validate_allowed_headers(headers, &options.allowed_headers)?;
|
||
}
|
||
|
||
Ok(())
|
||
}
|
||
|
||
/// Build a response for pre-flight checks
|
||
///
|
||
/// This implementation references the
|
||
/// [W3C recommendation](https://www.w3.org/TR/cors/#resource-preflight-requests).
|
||
fn preflight_response(
|
||
options: &Cors,
|
||
origin: Origin,
|
||
headers: Option<AccessControlRequestHeaders>,
|
||
) -> Response {
|
||
let response = Response::new();
|
||
|
||
// 7. If the resource supports credentials add a single Access-Control-Allow-Origin header,
|
||
// with the value of the Origin header as value, and add a
|
||
// single Access-Control-Allow-Credentials header with the case-sensitive string "true" as
|
||
// value.
|
||
// Otherwise, add a single Access-Control-Allow-Origin header,
|
||
// with either the value of the Origin header or the string "*" as value.
|
||
// Note: The string "*" cannot be used for a resource that supports credentials.
|
||
|
||
// Validation has been done in options.validate
|
||
let response = match options.allowed_origins {
|
||
AllOrSome::All => {
|
||
if options.send_wildcard {
|
||
response.any()
|
||
} else {
|
||
response.origin(&origin, true)
|
||
}
|
||
}
|
||
AllOrSome::Some(_) => response.origin(&origin, false),
|
||
};
|
||
let response = response.credentials(options.allow_credentials);
|
||
|
||
// 8. Optionally add a single Access-Control-Max-Age header
|
||
// with as value the amount of seconds the user agent is allowed to cache the result of the
|
||
// request.
|
||
let response = response.max_age(options.max_age);
|
||
|
||
// 9. If method is a simple method this step may be skipped.
|
||
// Add one or more Access-Control-Allow-Methods headers consisting of
|
||
// (a subset of) the list of methods.
|
||
// If a method is a simple method it does not need to be listed, but this is not prohibited.
|
||
// Since the list of methods can be unbounded,
|
||
// simply returning the method indicated by Access-Control-Request-Method
|
||
// (if supported) can be enough.
|
||
|
||
let response = response.methods(&options.allowed_methods);
|
||
|
||
// 10. If each of the header field-names is a simple header and none is Content-Type,
|
||
// this step may be skipped.
|
||
// Add one or more Access-Control-Allow-Headers headers consisting of (a subset of)
|
||
// the list of headers.
|
||
// If a header field name is a simple header and is not Content-Type,
|
||
// it is not required to be listed. Content-Type is to be listed as only a
|
||
// subset of its values makes it qualify as simple header.
|
||
// Since the list of headers can be unbounded, simply returning supported headers
|
||
// from Access-Control-Allow-Headers can be enough.
|
||
|
||
// We do not do anything special with simple headers
|
||
let response = if let Some(ref headers) = headers {
|
||
let &AccessControlRequestHeaders(ref headers) = headers;
|
||
response.headers(
|
||
headers
|
||
.iter()
|
||
.map(|s| &**s.deref())
|
||
.collect::<Vec<&str>>()
|
||
.as_slice(),
|
||
)
|
||
} else {
|
||
response
|
||
};
|
||
|
||
response
|
||
}
|
||
|
||
/// Do checks for an actual request
|
||
///
|
||
/// This implementation references the
|
||
/// [W3C recommendation](https://www.w3.org/TR/cors/#resource-requests).
|
||
fn actual_request_validate(options: &Cors, origin: &Origin) -> Result<(), Error> {
|
||
options.validate()?;
|
||
|
||
// Note: All header parse failures are dealt with in the `FromRequest` trait implementation
|
||
|
||
// 2. If the value of the Origin header is not a case-sensitive match for any of the values
|
||
// in list of origins, do not set any additional headers and terminate this set of steps.
|
||
// Always matching is acceptable since the list of origins can be unbounded.
|
||
|
||
validate_origin(&origin, &options.allowed_origins)?;
|
||
|
||
Ok(())
|
||
}
|
||
|
||
/// Build the response for an actual request
|
||
///
|
||
/// This implementation references the
|
||
/// [W3C recommendation](https://www.w3.org/TR/cors/#resource-requests).
|
||
fn actual_request_response(options: &Cors, origin: Origin) -> Response {
|
||
let response = Response::new();
|
||
|
||
// 3. If the resource supports credentials add a single Access-Control-Allow-Origin header,
|
||
// with the value of the Origin header as value, and add a
|
||
// single Access-Control-Allow-Credentials header with the case-sensitive string "true" as
|
||
// value.
|
||
// Otherwise, add a single Access-Control-Allow-Origin header,
|
||
// with either the value of the Origin header or the string "*" as value.
|
||
// Note: The string "*" cannot be used for a resource that supports credentials.
|
||
|
||
// Validation has been done in options.validate
|
||
|
||
let response = match options.allowed_origins {
|
||
AllOrSome::All => {
|
||
if options.send_wildcard {
|
||
response.any()
|
||
} else {
|
||
response.origin(&origin, true)
|
||
}
|
||
}
|
||
AllOrSome::Some(_) => response.origin(&origin, false),
|
||
};
|
||
|
||
let response = response.credentials(options.allow_credentials);
|
||
|
||
// 4. If the list of exposed headers is not empty add one or more
|
||
// Access-Control-Expose-Headers headers, with as values the header field names given in
|
||
// the list of exposed headers.
|
||
// By not adding the appropriate headers resource can also clear the preflight result cache
|
||
// of all entries where origin is a case-sensitive match for the value of the Origin header
|
||
// and url is a case-sensitive match for the URL of the resource.
|
||
|
||
let response = response.exposed_headers(
|
||
options
|
||
.expose_headers
|
||
.iter()
|
||
.map(|s| &**s)
|
||
.collect::<Vec<&str>>()
|
||
.as_slice(),
|
||
);
|
||
|
||
response
|
||
}
|
||
|
||
/// Returns "catch all" OPTIONS routes that you can mount to catch all OPTIONS request. Only works
|
||
/// if you have put a `Cors` struct into Rocket's managed state.
|
||
///
|
||
/// This route has very high rank (and therefore low priority) of
|
||
/// [max value](https://doc.rust-lang.org/nightly/std/primitive.isize.html#method.max_value)
|
||
/// so you can define your own to override this route's behaviour.
|
||
///
|
||
/// See the documentation at the [crate root](index.html) for usage information.
|
||
pub fn catch_all_options_routes() -> Vec<rocket::Route> {
|
||
vec![
|
||
rocket::Route::ranked(
|
||
isize::max_value(),
|
||
http::Method::Options,
|
||
"/",
|
||
catch_all_options_route_handler
|
||
),
|
||
rocket::Route::ranked(
|
||
isize::max_value(),
|
||
http::Method::Options,
|
||
"/<catch_all_options_route..>",
|
||
catch_all_options_route_handler
|
||
),
|
||
]
|
||
}
|
||
|
||
/// Handler for the "catch all options route"
|
||
fn catch_all_options_route_handler<'r>(
|
||
request: &'r Request,
|
||
_: rocket::Data,
|
||
) -> rocket::handler::Outcome<'r> {
|
||
|
||
let guard: Guard = match request.guard() {
|
||
Outcome::Success(guard) => guard,
|
||
Outcome::Failure((status, _)) => return rocket::handler::Outcome::failure(status),
|
||
Outcome::Forward(()) => unreachable!("Should not be reachable"),
|
||
};
|
||
|
||
info_!(
|
||
"\"Catch all\" handling of CORS `OPTIONS` preflight for request {}",
|
||
request
|
||
);
|
||
|
||
rocket::handler::Outcome::from(request, guard.responder(()))
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use std::str::FromStr;
|
||
|
||
use rocket::local::Client;
|
||
use rocket::http::Header;
|
||
use serde_json;
|
||
|
||
use super::*;
|
||
use http::Method;
|
||
|
||
fn make_cors_options() -> Cors {
|
||
let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.acme.com"]);
|
||
assert!(failed_origins.is_empty());
|
||
|
||
Cors {
|
||
allowed_origins: allowed_origins,
|
||
allowed_methods: vec![http::Method::Get]
|
||
.into_iter()
|
||
.map(From::from)
|
||
.collect(),
|
||
allowed_headers: AllowedHeaders::some(&[&"Authorization", "Accept"]),
|
||
allow_credentials: true,
|
||
expose_headers: ["Content-Type", "X-Custom"]
|
||
.into_iter()
|
||
.map(|s| s.to_string().into())
|
||
.collect(),
|
||
..Default::default()
|
||
}
|
||
}
|
||
|
||
fn make_invalid_options() -> Cors {
|
||
let mut cors = make_cors_options();
|
||
cors.allow_credentials = true;
|
||
cors.allowed_origins = AllOrSome::All;
|
||
cors.send_wildcard = true;
|
||
cors
|
||
}
|
||
|
||
/// Make a client with no routes for unit testing
|
||
fn make_client() -> Client {
|
||
let rocket = rocket::ignite();
|
||
Client::new(rocket).expect("valid rocket instance")
|
||
}
|
||
|
||
// CORS options test
|
||
|
||
#[test]
|
||
fn cors_is_validated() {
|
||
assert!(make_cors_options().validate().is_ok())
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "CredentialsWithWildcardOrigin")]
|
||
fn cors_validates_illegal_allow_credentials() {
|
||
let cors = make_invalid_options();
|
||
|
||
cors.validate().unwrap();
|
||
}
|
||
|
||
/// Check that the the default deserialization matches the one returned by `Default::default`
|
||
#[test]
|
||
fn cors_default_deserialization_is_correct() {
|
||
let deserialized: Cors = serde_json::from_str("{}").expect("To not fail");
|
||
assert_eq!(deserialized, Cors::default());
|
||
}
|
||
|
||
// The following tests check validation
|
||
|
||
#[test]
|
||
fn validate_origin_allows_all_origins() {
|
||
let url = "https://www.example.com";
|
||
let origin = Origin::from_str(url).unwrap();
|
||
let allowed_origins = AllOrSome::All;
|
||
|
||
not_err!(validate_origin(&origin, &allowed_origins));
|
||
}
|
||
|
||
#[test]
|
||
fn response_allows_origin() {
|
||
let url = "https://www.example.com";
|
||
let origin = Origin::from_str(url).unwrap();
|
||
let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.example.com"]);
|
||
assert!(failed_origins.is_empty());
|
||
|
||
not_err!(validate_origin(&origin, &allowed_origins));
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "OriginNotAllowed")]
|
||
fn response_rejects_invalid_origin() {
|
||
let url = "https://www.acme.com";
|
||
let origin = Origin::from_str(url).unwrap();
|
||
let (allowed_origins, failed_origins) = AllowedOrigins::some(&["https://www.example.com"]);
|
||
assert!(failed_origins.is_empty());
|
||
|
||
validate_origin(&origin, &allowed_origins).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
fn response_sets_exposed_headers_correctly() {
|
||
let headers = vec!["Bar", "Baz", "Foo"];
|
||
let response = Response::new();
|
||
let response = response.origin(
|
||
&FromStr::from_str("https://www.example.com").unwrap(),
|
||
false,
|
||
);
|
||
let response = response.exposed_headers(&headers);
|
||
|
||
// Build response and check built response header
|
||
let response = response.response(response::Response::new());
|
||
let actual_header: Vec<_> = response
|
||
.headers()
|
||
.get("Access-Control-Expose-Headers")
|
||
.collect();
|
||
|
||
assert_eq!(1, actual_header.len());
|
||
let mut actual_headers: Vec<String> = actual_header[0]
|
||
.split(',')
|
||
.map(|header| header.trim().to_string())
|
||
.collect();
|
||
actual_headers.sort();
|
||
assert_eq!(headers, actual_headers);
|
||
}
|
||
|
||
#[test]
|
||
fn response_sets_max_age_correctly() {
|
||
let response = Response::new();
|
||
let response = response.origin(
|
||
&FromStr::from_str("https://www.example.com").unwrap(),
|
||
false,
|
||
);
|
||
|
||
let response = response.max_age(Some(42));
|
||
|
||
// Build response and check built response header
|
||
let expected_header = vec!["42"];
|
||
let response = response.response(response::Response::new());
|
||
let actual_header: Vec<_> = response.headers().get("Access-Control-Max-Age").collect();
|
||
assert_eq!(expected_header, actual_header);
|
||
}
|
||
|
||
#[test]
|
||
fn response_does_not_set_max_age_when_none() {
|
||
let response = Response::new();
|
||
let response = response.origin(
|
||
&FromStr::from_str("https://www.example.com").unwrap(),
|
||
false,
|
||
);
|
||
|
||
let response = response.max_age(None);
|
||
|
||
// Build response and check built response header
|
||
let response = response.response(response::Response::new());
|
||
assert!(
|
||
response
|
||
.headers()
|
||
.get("Access-Control-Max-Age")
|
||
.next()
|
||
.is_none()
|
||
)
|
||
}
|
||
|
||
#[test]
|
||
fn allowed_methods_validated_correctly() {
|
||
let allowed_methods = vec![Method::Get, Method::Head, Method::Post]
|
||
.into_iter()
|
||
.map(From::from)
|
||
.collect();
|
||
|
||
let method = "GET";
|
||
|
||
not_err!(validate_allowed_method(
|
||
&FromStr::from_str(method).expect("not to fail"),
|
||
&allowed_methods,
|
||
));
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "MethodNotAllowed")]
|
||
fn allowed_methods_errors_on_disallowed_method() {
|
||
let allowed_methods = vec![Method::Get, Method::Head, Method::Post]
|
||
.into_iter()
|
||
.map(From::from)
|
||
.collect();
|
||
|
||
let method = "DELETE";
|
||
|
||
validate_allowed_method(
|
||
&FromStr::from_str(method).expect("not to fail"),
|
||
&allowed_methods,
|
||
).unwrap()
|
||
}
|
||
|
||
#[test]
|
||
fn all_allowed_headers_are_validated_correctly() {
|
||
let allowed_headers = AllOrSome::All;
|
||
let requested_headers = vec!["Bar", "Foo"];
|
||
|
||
not_err!(validate_allowed_headers(
|
||
&FromStr::from_str(&requested_headers.join(",")).unwrap(),
|
||
&allowed_headers,
|
||
));
|
||
}
|
||
|
||
/// `Response::allowed_headers` should check that headers are allowed, and only
|
||
/// echoes back the list that is actually requested for and not the whole list
|
||
#[test]
|
||
fn allowed_headers_are_validated_correctly() {
|
||
let allowed_headers = vec!["Bar", "Baz", "Foo"];
|
||
let requested_headers = vec!["Bar", "Foo"];
|
||
|
||
not_err!(validate_allowed_headers(
|
||
&FromStr::from_str(&requested_headers.join(",")).unwrap(),
|
||
&AllOrSome::Some(
|
||
allowed_headers
|
||
.iter()
|
||
.map(|s| FromStr::from_str(*s).unwrap())
|
||
.collect(),
|
||
),
|
||
));
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "HeadersNotAllowed")]
|
||
fn allowed_headers_errors_on_non_subset() {
|
||
let allowed_headers = vec!["Bar", "Baz", "Foo"];
|
||
let requested_headers = vec!["Bar", "Foo", "Unknown"];
|
||
|
||
validate_allowed_headers(
|
||
&FromStr::from_str(&requested_headers.join(",")).unwrap(),
|
||
&AllOrSome::Some(
|
||
allowed_headers
|
||
.iter()
|
||
.map(|s| FromStr::from_str(*s).unwrap())
|
||
.collect(),
|
||
),
|
||
).unwrap();
|
||
|
||
}
|
||
|
||
#[test]
|
||
fn response_does_not_build_if_origin_is_not_set() {
|
||
let response = Response::new();
|
||
let response = response.response(response::Response::new());
|
||
|
||
let headers: Vec<_> = response.headers().iter().collect();
|
||
assert_eq!(headers.len(), 0);
|
||
}
|
||
|
||
#[test]
|
||
fn response_build_removes_existing_cors_headers_and_keeps_others() {
|
||
use std::io::Cursor;
|
||
|
||
let original = response::Response::build()
|
||
.status(Status::ImATeapot)
|
||
.raw_header("X-Teapot-Make", "Rocket")
|
||
.raw_header("Access-Control-Max-Age", "42")
|
||
.sized_body(Cursor::new("Brewing the best coffee!"))
|
||
.finalize();
|
||
|
||
let response = Response::new();
|
||
let response = response.origin(
|
||
&FromStr::from_str("https://www.example.com").unwrap(),
|
||
false,
|
||
);
|
||
let response = response.response(original);
|
||
// Check CORS header
|
||
let expected_header = vec!["https://www.example.com"];
|
||
let actual_header: Vec<_> = response
|
||
.headers()
|
||
.get("Access-Control-Allow-Origin")
|
||
.collect();
|
||
assert_eq!(expected_header, actual_header);
|
||
|
||
// Check other header
|
||
let expected_header = vec!["Rocket"];
|
||
let actual_header: Vec<_> = response.headers().get("X-Teapot-Make").collect();
|
||
assert_eq!(expected_header, actual_header);
|
||
|
||
// Check that `Access-Control-Max-Age` is removed
|
||
assert!(
|
||
response
|
||
.headers()
|
||
.get("Access-Control-Max-Age")
|
||
.next()
|
||
.is_none()
|
||
);
|
||
|
||
|
||
}
|
||
|
||
#[derive(Debug, PartialEq, Serialize, Deserialize)]
|
||
struct MethodTest {
|
||
method: ::Method,
|
||
}
|
||
|
||
#[test]
|
||
fn method_serde_roundtrip() {
|
||
use serde_test::{Token, assert_tokens};
|
||
|
||
let test = MethodTest { method: From::from(http::Method::Get) };
|
||
|
||
assert_tokens(
|
||
&test,
|
||
&[
|
||
Token::Struct {
|
||
name: "MethodTest",
|
||
len: 1,
|
||
},
|
||
Token::Str("method"),
|
||
Token::Str("GET"),
|
||
Token::StructEnd,
|
||
],
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn preflight_validated_correctly() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let result = validate(&options, request.inner()).expect("to not fail");
|
||
let expected_result = ValidationResult::Preflight {
|
||
origin: FromStr::from_str("https://www.acme.com").unwrap(),
|
||
// Checks that only a subset of allowed headers are returned
|
||
// -- i.e. whatever is requested for
|
||
headers: Some(FromStr::from_str("Authorization").unwrap()),
|
||
};
|
||
|
||
assert_eq!(expected_result, result);
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "CredentialsWithWildcardOrigin")]
|
||
fn preflight_validation_errors_on_invalid_options() {
|
||
let options = make_invalid_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
fn preflight_validation_allows_all_origin() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.example.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let result = validate(&options, request.inner()).expect("to not fail");
|
||
let expected_result = ValidationResult::Preflight {
|
||
origin: FromStr::from_str("https://www.example.com").unwrap(),
|
||
headers: Some(FromStr::from_str("Authorization").unwrap()),
|
||
};
|
||
|
||
assert_eq!(expected_result, result);
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "OriginNotAllowed")]
|
||
fn preflight_validation_errors_on_invalid_origin() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.example.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "MissingRequestMethod")]
|
||
fn preflight_validation_errors_on_missing_request_method() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client.options("/").header(origin_header).header(
|
||
request_headers,
|
||
);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "MethodNotAllowed")]
|
||
fn preflight_validation_errors_on_disallowed_method() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Post,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "HeadersNotAllowed")]
|
||
fn preflight_validation_errors_on_disallowed_headers() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(vec![
|
||
FromStr::from_str("Authorization").unwrap(),
|
||
FromStr::from_str("X-NOT-ALLOWED").unwrap(),
|
||
]);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
fn actual_request_validated_correctly() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let result = validate(&options, request.inner()).expect("to not fail");
|
||
let expected_result = ValidationResult::Request {
|
||
origin: FromStr::from_str("https://www.acme.com").unwrap(),
|
||
};
|
||
|
||
assert_eq!(expected_result, result);
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "CredentialsWithWildcardOrigin")]
|
||
fn actual_request_validation_errors_on_invalid_options() {
|
||
let options = make_invalid_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
fn actual_request_validation_allows_all_origin() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.example.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let result = validate(&options, request.inner()).expect("to not fail");
|
||
let expected_result = ValidationResult::Request {
|
||
origin: FromStr::from_str("https://www.example.com").unwrap(),
|
||
};
|
||
|
||
assert_eq!(expected_result, result);
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic(expected = "OriginNotAllowed")]
|
||
fn actual_request_validation_errors_on_incorrect_origin() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.example.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let _ = validate(&options, request.inner()).unwrap();
|
||
}
|
||
|
||
#[test]
|
||
fn non_cors_request_return_empty_response() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let request = client.options("/");
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
let expected_response = Response::new();
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
#[test]
|
||
fn preflight_validated_and_built_correctly() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
|
||
let expected_response = Response::new()
|
||
.origin(&FromStr::from_str("https://www.acme.com/").unwrap(), false)
|
||
.headers(&["Authorization"])
|
||
.methods(&options.allowed_methods)
|
||
.credentials(options.allow_credentials)
|
||
.max_age(options.max_age);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
/// Tests that when All origins are allowed and send_wildcard disabled, the vary header is set
|
||
/// in the response and the requested origin is echoed
|
||
#[test]
|
||
fn preflight_all_origins_with_vary() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
options.send_wildcard = false;
|
||
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
|
||
let expected_response = Response::new()
|
||
.origin(&FromStr::from_str("https://www.acme.com/").unwrap(), true)
|
||
.headers(&["Authorization"])
|
||
.methods(&options.allowed_methods)
|
||
.credentials(options.allow_credentials)
|
||
.max_age(options.max_age);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
/// Tests that when All origins are allowed and send_wildcard enabled, the origin is set to "*"
|
||
#[test]
|
||
fn preflight_all_origins_with_wildcard() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
options.send_wildcard = true;
|
||
options.allow_credentials = false;
|
||
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let method_header = Header::from(hyper::header::AccessControlRequestMethod(
|
||
hyper::method::Method::Get,
|
||
));
|
||
let request_headers = hyper::header::AccessControlRequestHeaders(
|
||
vec![FromStr::from_str("Authorization").unwrap()],
|
||
);
|
||
let request_headers = Header::from(request_headers);
|
||
|
||
let request = client
|
||
.options("/")
|
||
.header(origin_header)
|
||
.header(method_header)
|
||
.header(request_headers);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
|
||
let expected_response = Response::new()
|
||
.any()
|
||
.headers(&["Authorization"])
|
||
.methods(&options.allowed_methods)
|
||
.credentials(options.allow_credentials)
|
||
.max_age(options.max_age);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
#[test]
|
||
fn actual_request_validated_and_built_correctly() {
|
||
let options = make_cors_options();
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
let expected_response = Response::new()
|
||
.origin(&FromStr::from_str("https://www.acme.com/").unwrap(), false)
|
||
.credentials(options.allow_credentials)
|
||
.exposed_headers(&["Content-Type", "X-Custom"]);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
#[test]
|
||
fn actual_request_all_origins_with_vary() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
options.send_wildcard = false;
|
||
options.allow_credentials = false;
|
||
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
let expected_response = Response::new()
|
||
.origin(&FromStr::from_str("https://www.acme.com/").unwrap(), true)
|
||
.credentials(options.allow_credentials)
|
||
.exposed_headers(&["Content-Type", "X-Custom"]);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
|
||
#[test]
|
||
fn actual_request_all_origins_with_wildcard() {
|
||
let mut options = make_cors_options();
|
||
options.allowed_origins = AllOrSome::All;
|
||
options.send_wildcard = true;
|
||
options.allow_credentials = false;
|
||
|
||
let client = make_client();
|
||
|
||
let origin_header = Header::from(
|
||
hyper::header::Origin::from_str("https://www.acme.com").unwrap(),
|
||
);
|
||
let request = client.get("/").header(origin_header);
|
||
|
||
let response = validate_and_build(&options, request.inner()).expect("to not fail");
|
||
let expected_response = Response::new()
|
||
.any()
|
||
.credentials(options.allow_credentials)
|
||
.exposed_headers(&["Content-Type", "X-Custom"]);
|
||
|
||
assert_eq!(expected_response, response);
|
||
}
|
||
}
|