init

.cargo/config.toml

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+[build]
+rustflags = ["--cfg", "tokio_unstable"]

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "fakeapi"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+axum = "0.7.7"
+console-subscriber = "0.4.0"
+rhai = { version = "1.19.0", features = ["serde"] }
+serde = { version = "1.0.210", features = ["derive"] }
+tokio = { version = "1.40.0", features = ["full"] }
+tracing-subscriber = "0.3.18"

src/main.rs

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+use axum::{
+    routing::{get, post},
+    http::StatusCode,
+    Json, Router,
+};
+use serde::{Deserialize, Serialize};
+
+#[tokio::main]
+async fn main() {
+    // initialize tracing
+    tracing_subscriber::fmt::init();
+    console_subscriber::init();
+
+    // build our application with a route
+    let app = Router::new()
+        // `GET /` goes to `root`
+        .route("/", get(root))
+        // `POST /users` goes to `create_user`
+        .route("/users", post(create_user));
+
+    // run our app with hyper, listening globally on port 3000
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
+    axum::serve(listener, app).await.unwrap();
+}
+
+// basic handler that responds with a static string
+async fn root() -> &'static str {
+    "Hello, World!"
+}
+
+async fn create_user(
+    // this argument tells axum to parse the request body
+    // as JSON into a `CreateUser` type
+    Json(payload): Json<CreateUser>,
+) -> (StatusCode, Json<User>) {
+    // insert your application logic here
+    let user = User {
+        id: 1337,
+        username: payload.username,
+    };
+
+    // this will be converted into a JSON response
+    // with a status code of `201 Created`
+    (StatusCode::CREATED, Json(user))
+}
+
+// the input to our `create_user` handler
+#[derive(Deserialize)]
+struct CreateUser {
+    username: String,
+}
+
+// the output to our `create_user` handler
+#[derive(Serialize)]
+struct User {
+    id: u64,
+    username: String,
+}