90 lines
3.3 KiB
Rust
90 lines
3.3 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 tokio;
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use futures::{Future, Stream};
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use futures::future::lazy;
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use hyper::{Body, Chunk, Client, Method, Request, Response, StatusCode};
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use hyper::client::HttpConnector;
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use hyper::server::{Http, Service};
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#[allow(unused, deprecated)]
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use std::ascii::AsciiExt;
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static NOTFOUND: &[u8] = b"Not Found";
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static URL: &str = "http://127.0.0.1:1337/web_api";
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static INDEX: &[u8] = b"<a href=\"test.html\">test.html</a>";
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static LOWERCASE: &[u8] = b"i am a lower case string";
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struct ResponseExamples(Client<HttpConnector>);
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impl Service for ResponseExamples {
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type Request = Request<Body>;
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type Response = Response<Body>;
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type Error = hyper::Error;
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type Future = Box<Future<Item = Self::Response, Error = Self::Error> + Send>;
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fn call(&self, req: Self::Request) -> Self::Future {
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match (req.method(), req.uri().path()) {
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(&Method::GET, "/") | (&Method::GET, "/index.html") => {
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let body = Body::from(INDEX);
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Box::new(futures::future::ok(Response::new(body)))
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},
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(&Method::GET, "/test.html") => {
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// Run a web query against the web api below
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let req = Request::builder()
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.method(Method::POST)
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.uri(URL)
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.body(LOWERCASE.into())
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.unwrap();
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let web_res_future = self.0.request(req);
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Box::new(web_res_future.map(|web_res| {
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let body = Body::wrap_stream(web_res.into_body().map(|b| {
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Chunk::from(format!("before: '{:?}'<br>after: '{:?}'",
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std::str::from_utf8(LOWERCASE).unwrap(),
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std::str::from_utf8(&b).unwrap()))
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}));
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Response::new(body)
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}))
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},
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(&Method::POST, "/web_api") => {
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// A web api to run against. Simple upcasing of the body.
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let body = Body::wrap_stream(req.into_body().map(|chunk| {
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let upper = chunk.iter().map(|byte| byte.to_ascii_uppercase())
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.collect::<Vec<u8>>();
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Chunk::from(upper)
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}));
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Box::new(futures::future::ok(Response::new(body)))
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},
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_ => {
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let body = Body::from(NOTFOUND);
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Box::new(futures::future::ok(Response::builder()
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.status(StatusCode::NOT_FOUND)
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.body(body)
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.unwrap()))
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}
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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".parse().unwrap();
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tokio::run(lazy(move || {
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let client = Client::new();
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let serve = Http::new().serve_addr(&addr, move || Ok(ResponseExamples(client.clone()))).unwrap();
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println!("Listening on http://{} with 1 thread.", serve.incoming_ref().local_addr());
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serve.map_err(|_| ()).for_each(move |conn| {
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tokio::spawn(conn.map_err(|err| println!("serve error: {:?}", err)))
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})
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}));
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}
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