#![deny(warnings)]
extern crate futures;
extern crate hyper;
extern crate pretty_env_logger;
extern crate serde_json;
use futures::{future, Future, Stream};
use hyper::{Body, Chunk, Client, Method, Request, Response, Server, StatusCode, header};
use hyper::client::HttpConnector;
use hyper::service::service_fn;
#[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"test.html";
static LOWERCASE: &[u8] = b"i am a lower case string";
fn response_examples(req: Request, client: &Client)
-> Box, Error=hyper::Error> + Send>
{
match (req.method(), req.uri().path()) {
(&Method::GET, "/") | (&Method::GET, "/index.html") => {
let body = Body::from(INDEX);
Box::new(future::ok(Response::new(body)))
},
(&Method::GET, "/test.html") => {
// Run a web query against the web api below
// build the request
let req = Request::builder()
.method(Method::POST)
.uri(URL)
.body(LOWERCASE.into())
.unwrap();
// use the request with client
let web_res_future = client.request(req);
Box::new(web_res_future.map(|web_res| {
// return the response that came from the web api and the original text together
// to show the difference
let body = Body::wrap_stream(web_res.into_body().map(|b| {
Chunk::from(format!("before: {}
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. Uppercases the body and returns it back.
let body = Body::wrap_stream(req.into_body().map(|chunk| {
// uppercase the letters
let upper = chunk.iter().map(|byte| byte.to_ascii_uppercase())
.collect::>();
Chunk::from(upper)
}));
Box::new(future::ok(Response::new(body)))
},
(&Method::GET, "/json") => {
let data = vec!["foo", "bar"];
let res = match serde_json::to_string(&data) {
Ok(json) => {
// return a json response
Response::builder()
.header(header::CONTENT_TYPE, "application/json")
.body(Body::from(json))
.unwrap()
}
// This is unnecessary here because we know
// this can't fail. But if we were serializing json that came from another
// source we could handle an error like this.
Err(e) => {
eprintln!("serializing json: {}", e);
Response::builder()
.status(StatusCode::INTERNAL_SERVER_ERROR)
.body(Body::from("Internal Server Error"))
.unwrap()
}
};
Box::new(future::ok(res))
}
_ => {
// Return 404 not found response.
let body = Body::from(NOTFOUND);
Box::new(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();
hyper::rt::run(future::lazy(move || {
// Share a `Client` with all `Service`s
let client = Client::new();
let new_service = move || {
// Move a clone of `client` into the `service_fn`.
let client = client.clone();
service_fn(move |req| {
response_examples(req, &client)
})
};
let server = Server::bind(&addr)
.serve(new_service)
.map_err(|e| eprintln!("server error: {}", e));
println!("Listening on http://{}", addr);
server
}));
}