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@seanmonstar @srijs @olehermanse @jolhoeft
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#![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;
static NOTFOUND: &[u8] = b"Not Found";
static URL: &str = "http://127.0.0.1:1337/json_api";
static INDEX: &[u8] = b"<a href=\"test.html\">test.html</a>";
static POST_DATA: &str = r#"{"original": "data"}"#;
type GenericError = Box<dyn std::error::Error + Send + Sync>;
type ResponseFuture = Box<Future<Item=Response<Body>, Error=GenericError> + Send>;
fn client_request_response(client: &Client<HttpConnector>) -> ResponseFuture {
let req = Request::builder()
.method(Method::POST)
.uri(URL)
.header(header::CONTENT_TYPE, "application/json")
.body(POST_DATA.into())
.unwrap();
Box::new(client.request(req).from_err().map(|web_res| {
// Compare the JSON we sent (before) with what we received (after):
let body = Body::wrap_stream(web_res.into_body().map(|b| {
Chunk::from(format!("<b>POST request body</b>: {}<br><b>Response</b>: {}",
POST_DATA,
std::str::from_utf8(&b).unwrap()))
}));
Response::new(body)
}))
}
fn api_post_response(req: Request<Body>) -> ResponseFuture {
// A web api to run against
Box::new(req.into_body()
.concat2() // Concatenate all chunks in the body
.from_err()
.and_then(|entire_body| {
// TODO: Replace all unwraps with proper error handling
let str = String::from_utf8(entire_body.to_vec())?;
let mut data : serde_json::Value = serde_json::from_str(&str)?;
data["test"] = serde_json::Value::from("test_value");
let json = serde_json::to_string(&data)?;
let response = Response::builder()
.status(StatusCode::OK)
.header(header::CONTENT_TYPE, "application/json")
.body(Body::from(json))?;
Ok(response)
})
)
}
fn api_get_response() -> ResponseFuture {
let data = vec!["foo", "bar"];
let res = match serde_json::to_string(&data) {
Ok(json) => {
Response::builder()
.header(header::CONTENT_TYPE, "application/json")
.body(Body::from(json))
.unwrap()
}
Err(_) => {
Response::builder()
.status(StatusCode::INTERNAL_SERVER_ERROR)
.body(Body::from("Internal Server Error"))
.unwrap()
}
};
Box::new(future::ok(res))
}
fn response_examples(req: Request<Body>, client: &Client<HttpConnector>) -> ResponseFuture {
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") => {
client_request_response(client)
},
(&Method::POST, "/json_api") => {
api_post_response(req)
},
(&Method::GET, "/json_api") => {
api_get_response()
}
_ => {
// 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
}));
}
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