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b/Cargo.toml @@ -0,0 +1,17 @@ +[package] +name = "shwatchit" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +axum = "0.5" +askama = "0.11" +tokio = { version = "1", features = ["full"] } +tracing = "0.1" +tracing-subscriber = { version = "0.3", features = ["env-filter"] } +tower = { version = "0.4", features = ["util", "timeout"] } +tower-http = { version = "0.2", features = ["add-extension", "trace"] } +uuid = { version = "0.8", features = ["serde", "v4"] } +serde = { version = "1", features = ["derive"] } diff --git a/src/form.rs b/src/form.rs new file mode 100644 index 0000000..a8b7842 --- /dev/null +++ b/src/form.rs @@ -0,0 +1,54 @@ +use axum::{extract::Form, response::Html}; +use serde::Deserialize; + +pub(crate) async fn show_form() -> Html<&'static str> { + Html( + r#" + + + + +
+ + + + + +
+ + + "#, + ) +} + +#[derive(Deserialize, Debug)] +#[allow(dead_code)] +pub(crate) struct Input { + name: String, + email: String, +} + +pub(crate) async fn accept_form(Form(input): Form) -> Html { + let Input { name, email: _ } = input; + let html = format!( + r#" + + + + +

Hi, {}

+ + + +"#, + name + ); + + Html(html) +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..51ead26 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,176 @@ +//! Provides a RESTful web server managing some Todos. +//! +//! API will be: +//! +//! - `GET /todos`: return a JSON list of Todos. +//! - `POST /todos`: create a new Todo. +//! - `PUT /todos/:id`: update a specific Todo. +//! - `DELETE /todos/:id`: delete a specific Todo. +//! +//! Run with +//! +//! ```not_rust +//! cargo run -p example-todos +//! ``` + +use std::{ + collections::HashMap, + net::SocketAddr, + sync::{Arc, RwLock}, + time::Duration, +}; + +use axum::{ + error_handling::HandleErrorLayer, + extract::{Extension, Path, Query}, + http::StatusCode, + response::IntoResponse, + routing::{get, patch}, + Json, Router, +}; +use serde::{Deserialize, Serialize}; +use tower::{BoxError, ServiceBuilder}; +use tower_http::trace::TraceLayer; +use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt}; +use uuid::Uuid; + +mod form; +mod template; + +#[tokio::main] +async fn main() { + tracing_subscriber::registry() + .with(tracing_subscriber::EnvFilter::new( + std::env::var("RUST_LOG") + .unwrap_or_else(|_| "example_todos=debug,tower_http=debug".into()), + )) + .with(tracing_subscriber::fmt::layer()) + .init(); + + let db = Db::default(); + + // Compose the routes + let app = Router::new() + .route("/todos", get(todos_index).post(todos_create)) + .route("/todos/:id", patch(todos_update).delete(todos_delete)) + .route("/greet/:name", get(template::greet)) + .route("/", get(form::show_form).post(form::accept_form)) + // Add middleware to all routes + .layer( + ServiceBuilder::new() + .layer(HandleErrorLayer::new(|error: BoxError| async move { + if error.is::() { + Ok(StatusCode::REQUEST_TIMEOUT) + } else { + Err(( + StatusCode::INTERNAL_SERVER_ERROR, + format!("Unhandled internal error: {}", error), + )) + } + })) + .timeout(Duration::from_secs(10)) + .layer(TraceLayer::new_for_http()) + .layer(Extension(db)) + .into_inner(), + ); + + let addr = SocketAddr::from(([127, 0, 0, 1], 3000)); + tracing::debug!("listening on {}", addr); + axum::Server::bind(&addr) + .serve(app.into_make_service()) + .await + .unwrap(); +} + +// The query parameters for todos index +#[derive(Debug, Deserialize, Default)] +pub struct Pagination { + pub offset: Option, + pub limit: Option, +} + +async fn todos_index( + pagination: Option>, + Extension(db): Extension, +) -> impl IntoResponse { + let todos = db.read().unwrap(); + + let Query(pagination) = pagination.unwrap_or_default(); + + let todos = todos + .values() + .skip(pagination.offset.unwrap_or(0)) + .take(pagination.limit.unwrap_or(usize::MAX)) + .cloned() + .collect::>(); + + Json(todos) +} + +#[derive(Debug, Deserialize)] +struct CreateTodo { + text: String, +} + +async fn todos_create( + Json(input): Json, + Extension(db): Extension, +) -> impl IntoResponse { + let todo = Todo { + id: Uuid::new_v4(), + text: input.text, + completed: false, + }; + + db.write().unwrap().insert(todo.id, todo.clone()); + + (StatusCode::CREATED, Json(todo)) +} + +#[derive(Debug, Deserialize)] +struct UpdateTodo { + text: Option, + completed: Option, +} + +async fn todos_update( + Path(id): Path, + Json(input): Json, + Extension(db): Extension, +) -> Result { + let mut todo = db + .read() + .unwrap() + .get(&id) + .cloned() + .ok_or(StatusCode::NOT_FOUND)?; + + if let Some(text) = input.text { + todo.text = text; + } + + if let Some(completed) = input.completed { + todo.completed = completed; + } + + db.write().unwrap().insert(todo.id, todo.clone()); + + Ok(Json(todo)) +} + +async fn todos_delete(Path(id): Path, Extension(db): Extension) -> impl IntoResponse { + if db.write().unwrap().remove(&id).is_some() { + StatusCode::NO_CONTENT + } else { + StatusCode::NOT_FOUND + } +} + +type Db = Arc>>; + +#[derive(Debug, Serialize, Clone)] +struct Todo { + id: Uuid, + text: String, + completed: bool, +} diff --git a/src/template.rs b/src/template.rs new file mode 100644 index 0000000..2b95388 --- /dev/null +++ b/src/template.rs @@ -0,0 +1,35 @@ +use askama::Template; +use axum::{ + extract, + http::StatusCode, + response::{Html, IntoResponse, Response}, +}; + +pub(crate) async fn greet(extract::Path(name): extract::Path) -> impl IntoResponse { + let template = HelloTemplate { name }; + HtmlTemplate(template) +} + +#[derive(Template)] +#[template(path = "hello.html")] +struct HelloTemplate { + name: String, +} + +struct HtmlTemplate(T); + +impl IntoResponse for HtmlTemplate +where + T: Template, +{ + fn into_response(self) -> Response { + match self.0.render() { + Ok(html) => Html(html).into_response(), + Err(err) => ( + StatusCode::INTERNAL_SERVER_ERROR, + format!("Failed to render template. Error: {}", err), + ) + .into_response(), + } + } +} diff --git a/templates/hello.html b/templates/hello.html new file mode 100644 index 0000000..33fdc85 --- /dev/null +++ b/templates/hello.html @@ -0,0 +1 @@ +

Hello, {{ name }}!