#![deny(warnings)] use hyper::{Body, Chunk, Client, Method, Request, Response, Server, StatusCode, header}; use hyper::client::HttpConnector; use hyper::service::{make_service_fn, service_fn}; use futures_util::{TryStreamExt}; type GenericError = Box; type Result = std::result::Result; static INDEX: &[u8] = b"test.html"; static INTERNAL_SERVER_ERROR: &[u8] = b"Internal Server Error"; static NOTFOUND: &[u8] = b"Not Found"; static POST_DATA: &str = r#"{"original": "data"}"#; static URL: &str = "http://127.0.0.1:1337/json_api"; async fn client_request_response( client: &Client ) -> Result> { let req = Request::builder() .method(Method::POST) .uri(URL) .header(header::CONTENT_TYPE, "application/json") .body(POST_DATA.into()) .unwrap(); let web_res = client.request(req).await?; // Compare the JSON we sent (before) with what we received (after): let body = Body::wrap_stream(web_res.into_body().map_ok(|b| { Chunk::from(format!("POST request body: {}
Response: {}", POST_DATA, std::str::from_utf8(&b).unwrap())) })); Ok(Response::new(body)) } async fn api_post_response(req: Request) -> Result> { // A web api to run against let entire_body = req.into_body().try_concat().await?; // TODO: Replace all unwraps with proper error handling let str = String::from_utf8(entire_body.to_vec())?; let mut data : serde_json::Value = serde_json::from_str(&str)?; data["test"] = serde_json::Value::from("test_value"); let json = serde_json::to_string(&data)?; let response = Response::builder() .status(StatusCode::OK) .header(header::CONTENT_TYPE, "application/json") .body(Body::from(json))?; Ok(response) } async fn api_get_response() -> Result> { let data = vec!["foo", "bar"]; let res = match serde_json::to_string(&data) { Ok(json) => { Response::builder() .header(header::CONTENT_TYPE, "application/json") .body(Body::from(json)) .unwrap() } Err(_) => { Response::builder() .status(StatusCode::INTERNAL_SERVER_ERROR) .body(INTERNAL_SERVER_ERROR.into()) .unwrap() } }; Ok(res) } async fn response_examples( req: Request, client: Client ) -> Result> { match (req.method(), req.uri().path()) { (&Method::GET, "/") | (&Method::GET, "/index.html") => { Ok(Response::new(INDEX.into())) }, (&Method::GET, "/test.html") => { client_request_response(&client).await }, (&Method::POST, "/json_api") => { api_post_response(req).await }, (&Method::GET, "/json_api") => { api_get_response().await } _ => { // Return 404 not found response. Ok(Response::builder() .status(StatusCode::NOT_FOUND) .body(NOTFOUND.into()) .unwrap()) } } } #[tokio::main] async fn main() -> Result<()> { pretty_env_logger::init(); let addr = "127.0.0.1:1337".parse().unwrap(); // Share a `Client` with all `Service`s let client = Client::new(); let new_service = make_service_fn(move |_| { // Move a clone of `client` into the `service_fn`. let client = client.clone(); async { Ok::<_, GenericError>(service_fn(move |req| { // Clone again to ensure that client outlives this closure. response_examples(req, client.to_owned()) })) } }); let server = Server::bind(&addr) .serve(new_service); println!("Listening on http://{}", addr); server.await?; Ok(()) }