Remove extraneous dependency on 'futures-util'.

core/lib/Cargo.toml

@@ -27,7 +27,6 @@ ctrl_c_shutdown = ["tokio/signal"]
 [dependencies]
 rocket_codegen = { version = "0.5.0-dev", path = "../codegen" }
 rocket_http = { version = "0.5.0-dev", path = "../http" }
-futures-util = "0.3.0"
 futures = "0.3.0"
 tokio = { version = "0.2.9", features = ["fs", "io-std", "io-util", "rt-threaded", "sync"] }
 yansi = "0.5"

core/lib/src/catcher.rs

@@ -155,7 +155,7 @@ macro_rules! default_catchers {
         let mut map = HashMap::new();
 
         $(
-            fn $fn_name<'r>(req: &'r Request<'_>) -> futures_util::future::BoxFuture<'r, response::Result<'r>> {
+            fn $fn_name<'r>(req: &'r Request<'_>) -> futures::future::BoxFuture<'r, response::Result<'r>> {
                 status::Custom(Status::from_code($code).unwrap(),
                     content::Html(error_page_template!($code, $name, $description))
                 ).respond_to(req)

core/lib/src/codegen.rs

@@ -1,4 +1,4 @@
-use futures_util::future::BoxFuture;
+use crate::futures::future::BoxFuture;
 
 use crate::{Request, Data};
 use crate::handler::{Outcome, ErrorHandler};

core/lib/src/data/from_data.rs

@@ -1,7 +1,7 @@
 use std::borrow::Borrow;
 
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
-use futures_util::future::{ready, FutureExt};
+use futures::future::{ready, FutureExt};
 
 use crate::outcome::{self, IntoOutcome};
 use crate::outcome::Outcome::*;

core/lib/src/ext.rs

@@ -2,7 +2,7 @@ use std::io::{self, Cursor};
 use std::pin::Pin;
 use std::task::{Poll, Context};
 
-use futures_util::{ready, future::BoxFuture, stream::Stream};
+use futures::{ready, future::BoxFuture, stream::Stream};
 use tokio::io::{AsyncRead, AsyncReadExt as _};
 
 use crate::http::hyper;

core/lib/src/fairing/ad_hoc.rs

@@ -1,6 +1,6 @@
 use std::sync::Mutex;
 
-use futures_util::future::{Future, BoxFuture};
+use futures::future::{Future, BoxFuture};
 
 use crate::{Manifest, Rocket, Request, Response, Data};
 use crate::fairing::{Fairing, Kind, Info};

core/lib/src/handler.rs

@@ -1,6 +1,6 @@
 //! Types and traits for request and error handlers and their return values.
 
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
 
 use crate::data::Data;
 use crate::request::Request;

core/lib/src/request/form/form.rs

@@ -215,7 +215,7 @@ impl<'f, T: FromForm<'f> + Send + 'f> FromData<'f> for Form<T> {
     }
 
     fn from_data(_: &'f Request<'_>, o: Transformed<'f, Self>) -> FromDataFuture<'f, Self, Self::Error> {
-        Box::pin(futures_util::future::ready(o.borrowed().and_then(|data| {
+        Box::pin(futures::future::ready(o.borrowed().and_then(|data| {
             <Form<T>>::from_data(data, true).map(Form)
         })))
     }

core/lib/src/request/form/lenient.rs

@@ -105,7 +105,7 @@ impl<'f, T: FromForm<'f> + Send + 'f> FromData<'f> for LenientForm<T> {
     }
 
     fn from_data(_: &'f Request<'_>, o: Transformed<'f, Self>) -> FromDataFuture<'f, Self, Self::Error> {
-        Box::pin(futures_util::future::ready(o.borrowed().and_then(|form| {
+        Box::pin(futures::future::ready(o.borrowed().and_then(|form| {
             <Form<T>>::from_data(form, false).map(LenientForm)
         })))
     }

core/lib/src/request/from_request.rs

@@ -1,7 +1,7 @@
 use std::fmt::Debug;
 use std::net::SocketAddr;
 
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
 
 use crate::router::Route;
 use crate::request::Request;
@@ -467,7 +467,7 @@ impl<'a, 'r, T: FromRequest<'a, 'r> + 'a> FromRequest<'a, 'r> for Result<T, T::E
         where 'a: 'y, 'r: 'y
     {
         // TODO: FutureExt::map is a workaround (see rust-lang/rust#60658)
-        use futures_util::future::FutureExt;
+        use futures::future::FutureExt;
         T::from_request(request).map(|x| match x {
             Success(val) => Success(Ok(val)),
             Failure((_, e)) => Success(Err(e)),
@@ -483,7 +483,7 @@ impl<'a, 'r, T: FromRequest<'a, 'r> + 'a> FromRequest<'a, 'r> for Option<T> {
         where 'a: 'y, 'r: 'y
     {
         // TODO: FutureExt::map is a workaround (see rust-lang/rust#60658)
-        use futures_util::future::FutureExt;
+        use futures::future::FutureExt;
         T::from_request(request).map(|x| match x {
             Success(val) => Success(Some(val)),
             Failure(_) | Forward(_) => Success(None),

core/lib/src/request/request.rs

@@ -6,7 +6,7 @@ use std::str;
 
 use yansi::Paint;
 use state::{Container, Storage};
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
 
 use crate::request::{FromParam, FromSegments, FromRequest, Outcome};
 use crate::request::{FromFormValue, FormItems, FormItem};

core/lib/src/response/content.rs

@@ -59,7 +59,7 @@ impl<'r, R: Responder<'r> + Send + 'r> Responder<'r> for Content<R> {
 
 macro_rules! ctrs {
     ($($name:ident: $ct:ident, $name_str:expr, $ct_str:expr),+) => {
-        use futures_util::future::BoxFuture;
+        use futures::future::BoxFuture;
 
         $(
             #[doc="Override the `Content-Type` of the response to <b>"]

core/lib/src/response/responder.rs

@@ -2,7 +2,7 @@ use std::fs::File;
 use std::io::Cursor;
 
 use tokio::io::BufReader;
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
 
 use crate::http::{Status, ContentType, StatusClass};
 use crate::response::{self, Response, Body};

core/lib/src/rocket.rs

@@ -5,8 +5,8 @@ use std::io;
 use std::mem;
 use std::sync::Arc;
 
-use futures_util::future::{Future, FutureExt, BoxFuture};
+use futures::future::{Future, FutureExt, BoxFuture};
-use futures_util::stream::StreamExt;
+use futures::stream::StreamExt;
 use tokio::sync::{mpsc, oneshot};
 
 use yansi::Paint;
@@ -936,7 +936,7 @@ impl Rocket {
         #[cfg(feature = "ctrl_c_shutdown")]
         {
             tokio::spawn(async move {
-                use futures_util::future::{select, Either};
+                use futures::future::{select, Either};
 
                 let either = select(
                     tokio::signal::ctrl_c().boxed(),

core/lib/src/router/mod.rs

@@ -3,7 +3,7 @@ mod route;
 
 use std::collections::hash_map::HashMap;
 
-use futures_util::future::BoxFuture;
+use futures::future::BoxFuture;
 
 pub use self::route::Route;
 

core/lib/tests/local-request-content-type-issue-505.rs

@@ -27,7 +27,7 @@ impl FromDataSimple for HasContentType {
     type Error = ();
 
     fn from_data(request: &Request<'_>, data: Data) -> data::FromDataFuture<'static, Self, Self::Error> {
-        Box::pin(futures_util::future::ready(if request.content_type().is_some() {
+        Box::pin(futures::future::ready(if request.content_type().is_some() {
             Success(HasContentType)
         } else {
             Forward(data)