Files
hyper/examples/web_api.rs
Sean McArthur c4974500ab feat(server): re-design Server as higher-level API
The `hyper::Server` is now a proper higher-level API for running HTTP
servers. There is a related `hyper::server::Builder` type, to construct
a `Server`. All other types (`Http`, `Serve`, etc) were moved into the
"lower-level" `hyper::server::conn` module.

The `Server` is a `Future` representing a listening HTTP server. Options
needed to build one are set on the `Builder`.

As `Server` is just a `Future`, it no longer owns a thread-blocking
executor, and can thus be run next to other servers, clients, or
what-have-you.

Closes #1322
Closes #1263

BREAKING CHANGE: The `Server` is no longer created from `Http::bind`,
  nor is it `run`. It is a `Future` that must be polled by an
  `Executor`.

  The `hyper::server::Http` type has move to
  `hyper::server::conn::Http`.
2018-04-16 14:29:19 -07:00

92 lines
3.1 KiB
Rust

#![deny(warnings)]
extern crate futures;
extern crate hyper;
extern crate pretty_env_logger;
extern crate tokio;
use futures::{Future, Stream};
use futures::future::lazy;
use hyper::{Body, Chunk, Client, Method, Request, Response, StatusCode};
use hyper::client::HttpConnector;
use hyper::server::{Server, Service};
#[allow(unused, deprecated)]
use std::ascii::AsciiExt;
static NOTFOUND: &[u8] = b"Not Found";
static URL: &str = "http://127.0.0.1:1337/web_api";
static INDEX: &[u8] = b"<a href=\"test.html\">test.html</a>";
static LOWERCASE: &[u8] = b"i am a lower case string";
struct ResponseExamples(Client<HttpConnector>);
impl Service for ResponseExamples {
type Request = Request<Body>;
type Response = Response<Body>;
type Error = hyper::Error;
type Future = Box<Future<Item = Self::Response, Error = Self::Error> + Send>;
fn call(&self, req: Self::Request) -> Self::Future {
match (req.method(), req.uri().path()) {
(&Method::GET, "/") | (&Method::GET, "/index.html") => {
let body = Body::from(INDEX);
Box::new(futures::future::ok(Response::new(body)))
},
(&Method::GET, "/test.html") => {
// Run a web query against the web api below
let req = Request::builder()
.method(Method::POST)
.uri(URL)
.body(LOWERCASE.into())
.unwrap();
let web_res_future = self.0.request(req);
Box::new(web_res_future.map(|web_res| {
let body = Body::wrap_stream(web_res.into_body().map(|b| {
Chunk::from(format!("before: '{:?}'<br>after: '{:?}'",
std::str::from_utf8(LOWERCASE).unwrap(),
std::str::from_utf8(&b).unwrap()))
}));
Response::new(body)
}))
},
(&Method::POST, "/web_api") => {
// A web api to run against. Simple upcasing of the body.
let body = Body::wrap_stream(req.into_body().map(|chunk| {
let upper = chunk.iter().map(|byte| byte.to_ascii_uppercase())
.collect::<Vec<u8>>();
Chunk::from(upper)
}));
Box::new(futures::future::ok(Response::new(body)))
},
_ => {
let body = Body::from(NOTFOUND);
Box::new(futures::future::ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body(body)
.unwrap()))
}
}
}
}
fn main() {
pretty_env_logger::init();
let addr = "127.0.0.1:1337".parse().unwrap();
tokio::run(lazy(move || {
let client = Client::new();
let server = Server::bind(&addr)
.serve(move || Ok(ResponseExamples(client.clone())))
.map_err(|e| eprintln!("server error: {}", e));
println!("Listening on http://{}", addr);
server
}));
}