97 lines
3.7 KiB
Rust
97 lines
3.7 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_core;
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use futures::{Future, Stream};
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use hyper::{Body, Chunk, Client, Get, Post, StatusCode};
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use hyper::error::Error;
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use hyper::header::ContentLength;
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use hyper::server::{Http, Service, Request, Response};
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#[allow(unused)]
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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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pub type ResponseStream = Box<Stream<Item=Chunk, Error=Error>>;
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struct ResponseExamples(tokio_core::reactor::Handle);
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impl Service for ResponseExamples {
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type Request = Request;
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type Response = Response<ResponseStream>;
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type Error = hyper::Error;
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type Future = Box<Future<Item = Self::Response, Error = Self::Error>>;
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fn call(&self, req: Request) -> Self::Future {
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match (req.method(), req.path()) {
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(&Get, "/") | (&Get, "/index.html") => {
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let body: ResponseStream = Box::new(Body::from(INDEX));
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Box::new(futures::future::ok(Response::new()
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.with_header(ContentLength(INDEX.len() as u64))
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.with_body(body)))
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},
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(&Get, "/test.html") => {
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// Run a web query against the web api below
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let client = Client::configure().build(&self.0);
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let mut req = Request::new(Post, URL.parse().unwrap());
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req.set_body(LOWERCASE);
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let web_res_future = client.request(req);
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Box::new(web_res_future.map(|web_res| {
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let body: ResponseStream = Box::new(web_res.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().with_body(body)
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}))
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},
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(&Post, "/web_api") => {
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// A web api to run against. Simple upcasing of the body.
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let body: ResponseStream = Box::new(req.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().with_body(body)))
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},
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_ => {
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let body: ResponseStream = Box::new(Body::from(NOTFOUND));
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Box::new(futures::future::ok(Response::new()
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.with_status(StatusCode::NotFound)
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.with_header(ContentLength(NOTFOUND.len() as u64))
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.with_body(body)))
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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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let mut core = tokio_core::reactor::Core::new().unwrap();
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let handle = core.handle();
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let client_handle = core.handle();
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let serve = Http::new().serve_addr_handle(&addr, &handle, move || Ok(ResponseExamples(client_handle.clone()))).unwrap();
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println!("Listening on http://{} with 1 thread.", serve.incoming_ref().local_addr());
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let h2 = handle.clone();
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handle.spawn(serve.for_each(move |conn| {
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h2.spawn(conn.map(|_| ()).map_err(|err| println!("serve error: {:?}", err)));
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Ok(())
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}).map_err(|_| ()));
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core.run(futures::future::empty::<(), ()>()).unwrap();
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}
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