This projects serves to enable automatic rendering of openapi.json files, and provides facilities to also serve the documentation alongside your api.

Usage

First, add the following lines to your Cargo.toml

[dependencies]
rocket_okapi = "0.5"
schemars = "0.8"
okapi = { version = "0.5", features = ["derive_json_schema"] }

To add documentation to a set of endpoints, a couple of steps are required. The request and response types of the endpoint must implement JsonSchema. Secondly, the function must be marked with #[openapi]. After that, you can simply replace routes! with routes_with_openapi!. This will append an additional route to the resulting Vec<Route>, which contains the openapi.json file that is required by swagger. Now that we have the json file that we need, we can serve the swagger web interface at another endpoint, and we should be able to load the example in the browser!

Example

use rocket::get;
use rocket::serde::json::Json;
use rocket_okapi::{openapi, routes_with_openapi, JsonSchema};
use rocket_okapi::swagger_ui::{make_swagger_ui, SwaggerUIConfig};

#[derive(serde::Serialize, JsonSchema)]
struct Response {
    reply: String,
}

#[openapi]
#[get("/")]
fn my_controller() -> Json<Response> {
    Json(Response {
        reply: "show me the docs!".to_string(),
    })
}

fn get_docs() -> SwaggerUIConfig {
    use rocket_okapi::swagger_ui::UrlObject;

    SwaggerUIConfig {
        url: "/my_resource/openapi.json".to_string(),
        urls: vec![UrlObject::new("My Resource", "/v1/company/openapi.json")],
        ..Default::default()
    }
}

fn main() {
    rocket::build()
        .mount("/my_resource", routes_with_openapi![my_controller])
        .mount("/swagger", make_swagger_ui(&get_docs()))
        .launch();
}