d127201ef2
A Cargo feature `runtime` is added, which is enabled by default, that includes the following: - The `client::HttpConnector`, which uses `tokio::net::TcpStream`. - The `server::AddrStream`, which uses `tokio::net::TcpListener`. - The `hyper::rt` module, which includes useful utilities to work with the runtime without needing to import `futures` or `tokio` explicity. Disabling the feature removes many of these niceties, but allows people to use hyper in environments that have an alternative runtime, without needing to download an unused one.
97 lines
3.8 KiB
Rust
97 lines
3.8 KiB
Rust
#![deny(warnings)]
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extern crate futures;
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extern crate hyper;
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extern crate pretty_env_logger;
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extern crate url;
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use futures::{future, Future, Stream};
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use hyper::{Body, Method, Request, Response, Server, StatusCode};
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use hyper::service::service_fn;
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use std::collections::HashMap;
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use url::form_urlencoded;
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static INDEX: &[u8] = b"<html><body><form action=\"post\" method=\"post\">Name: <input type=\"text\" name=\"name\"><br>Number: <input type=\"text\" name=\"number\"><br><input type=\"submit\"></body></html>";
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static MISSING: &[u8] = b"Missing field";
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static NOTNUMERIC: &[u8] = b"Number field is not numeric";
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// Using service_fn, we can turn this function into a `Service`.
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fn param_example(req: Request<Body>) -> Box<Future<Item=Response<Body>, Error=hyper::Error> + Send> {
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match (req.method(), req.uri().path()) {
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(&Method::GET, "/") | (&Method::GET, "/post") => {
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Box::new(future::ok(Response::new(INDEX.into())))
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},
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(&Method::POST, "/post") => {
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Box::new(req.into_body().concat2().map(|b| {
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// Parse the request body. form_urlencoded::parse
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// always succeeds, but in general parsing may
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// fail (for example, an invalid post of json), so
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// returning early with BadRequest may be
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// necessary.
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//
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// Warning: this is a simplified use case. In
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// principle names can appear multiple times in a
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// form, and the values should be rolled up into a
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// HashMap<String, Vec<String>>. However in this
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// example the simpler approach is sufficient.
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let params = form_urlencoded::parse(b.as_ref()).into_owned().collect::<HashMap<String, String>>();
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// Validate the request parameters, returning
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// early if an invalid input is detected.
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let name = if let Some(n) = params.get("name") {
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n
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} else {
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return Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap();
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};
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let number = if let Some(n) = params.get("number") {
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if let Ok(v) = n.parse::<f64>() {
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v
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} else {
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return Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(NOTNUMERIC.into())
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.unwrap();
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}
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} else {
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return Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap();
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};
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// Render the response. This will often involve
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// calls to a database or web service, which will
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// require creating a new stream for the response
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// body. Since those may fail, other error
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// responses such as InternalServiceError may be
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// needed here, too.
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let body = format!("Hello {}, your number is {}", name, number);
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Response::new(body.into())
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}))
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},
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_ => {
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Box::new(future::ok(Response::builder()
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.status(StatusCode::NOT_FOUND)
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.body(Body::empty())
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.unwrap()))
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}
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}
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}
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fn main() {
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pretty_env_logger::init();
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let addr = ([127, 0, 0, 1], 1337).into();
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let server = Server::bind(&addr)
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.serve(|| service_fn(param_example))
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.map_err(|e| eprintln!("server error: {}", e));
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hyper::rt::run(server);
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}
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