Changed the add_route API to allow the use of simpler, async handlers

Cargo.toml

@@ -28,5 +28,4 @@ mime_guess = { version = "2.0.3", optional = true }
 
 [dev-dependencies]
 env_logger = "0.8.1"
-futures-util = "0.3.7"
 tokio = { version = "0.3.1", features = ["macros", "rt-multi-thread", "sync"] }

examples/certificates.rs

@@ -1,6 +1,4 @@
 use anyhow::*;
-use futures_core::future::BoxFuture;
-use futures_util::FutureExt;
 use log::LevelFilter;
 use tokio::sync::RwLock;
 use northstar::{Certificate, GEMINI_MIME, GEMINI_PORT, Request, Response, Server};
@@ -31,44 +29,42 @@ async fn main() -> Result<()> {
 /// selecting a username.  They'll then get a message confirming their account creation.
 /// Any time this user visits the site in the future, they'll get a personalized welcome
 /// message.
-fn handle_request(users: Arc<RwLock<HashMap<CertBytes, String>>>, request: Request) -> BoxFuture<'static, Result<Response>> {
-    async move {
-        if let Some(Certificate(cert_bytes)) = request.certificate() {
-            // The user provided a certificate
-            let users_read = users.read().await;
-            if let Some(user) = users_read.get(cert_bytes) {
-                // The user has already registered
+async fn handle_request(users: Arc<RwLock<HashMap<CertBytes, String>>>, request: Request) -> Result<Response> {
+    if let Some(Certificate(cert_bytes)) = request.certificate() {
+        // The user provided a certificate
+        let users_read = users.read().await;
+        if let Some(user) = users_read.get(cert_bytes) {
+            // The user has already registered
+            Ok(
+                Response::success_with_body(
+                    &GEMINI_MIME,
+                    format!("Welcome {}!", user)
+                )
+            )
+        } else {
+            // The user still needs to register
+            drop(users_read);
+            if let Some(query_part) = request.uri().query() {
+                // The user provided some input (a username request)
+                let username = query_part.as_str();
+                let mut users_write = users.write().await;
+                users_write.insert(cert_bytes.clone(), username.to_owned());
                 Ok(
                     Response::success_with_body(
                         &GEMINI_MIME,
-                        format!("Welcome {}!", user)
+                        format!(
+                            "Your account has been created {}!  Welcome!",
+                            username
+                        )
                     )
                 )
             } else {
-                // The user still needs to register
-                drop(users_read);
-                if let Some(query_part) = request.uri().query() {
-                    // The user provided some input (a username request)
-                    let username = query_part.as_str();
-                    let mut users_write = users.write().await;
-                    users_write.insert(cert_bytes.clone(), username.to_owned());
-                    Ok(
-                        Response::success_with_body(
-                            &GEMINI_MIME,
-                            format!(
-                                "Your account has been created {}!  Welcome!",
-                                username
-                            )
-                        )
-                    )
-                } else {
-                    // The user didn't provide input, and should be prompted
-                    Response::input("What username would you like?")
-                }
+                // The user didn't provide input, and should be prompted
+                Response::input("What username would you like?")
             }
-        } else {
-            // The user didn't provide a certificate
-            Ok(Response::client_certificate_required())
         }
-    }.boxed()
+    } else {
+        // The user didn't provide a certificate
+        Ok(Response::client_certificate_required())
+    }
 }

examples/document.rs

@@ -1,6 +1,4 @@
 use anyhow::*;
-use futures_core::future::BoxFuture;
-use futures_util::FutureExt;
 use log::LevelFilter;
 use northstar::{Server, Request, Response, GEMINI_PORT, Document};
 use northstar::document::HeadingLevel::*;
@@ -17,36 +15,33 @@ async fn main() -> Result<()> {
         .await
 }
 
-fn handle_request(_request: Request) -> BoxFuture<'static, Result<Response>> {
-    async move {
-        let mut document = Document::new();
+async fn handle_request(_request: Request) -> Result<Response> {
+    let mut document = Document::new();
 
-        document
-            .add_preformatted(include_str!("northstar_logo.txt"))
-            .add_blank_line()
-            .add_link("https://docs.rs/northstar", "Documentation")
-            .add_link("https://github.com/panicbit/northstar", "GitHub")
-            .add_blank_line()
-            .add_heading(H1, "Usage")
-            .add_blank_line()
-            .add_text("Add the latest version of northstar to your `Cargo.toml`.")
-            .add_blank_line()
-            .add_heading(H2, "Manually")
-            .add_blank_line()
-            .add_preformatted_with_alt("toml", r#"northstar = "0.3.0" # check crates.io for the latest version"#)
-            .add_blank_line()
-            .add_heading(H2, "Automatically")
-            .add_blank_line()
-            .add_preformatted_with_alt("sh", "cargo add northstar")
-            .add_blank_line()
-            .add_heading(H1, "Generating a key & certificate")
-            .add_blank_line()
-            .add_preformatted_with_alt("sh", concat!(
-                "mkdir cert && cd cert\n",
-                "openssl req -x509 -nodes -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365",
-            ));
+    document
+        .add_preformatted(include_str!("northstar_logo.txt"))
+        .add_blank_line()
+        .add_link("https://docs.rs/northstar", "Documentation")
+        .add_link("https://github.com/panicbit/northstar", "GitHub")
+        .add_blank_line()
+        .add_heading(H1, "Usage")
+        .add_blank_line()
+        .add_text("Add the latest version of northstar to your `Cargo.toml`.")
+        .add_blank_line()
+        .add_heading(H2, "Manually")
+        .add_blank_line()
+        .add_preformatted_with_alt("toml", r#"northstar = "0.3.0" # check crates.io for the latest version"#)
+        .add_blank_line()
+        .add_heading(H2, "Automatically")
+        .add_blank_line()
+        .add_preformatted_with_alt("sh", "cargo add northstar")
+        .add_blank_line()
+        .add_heading(H1, "Generating a key & certificate")
+        .add_blank_line()
+        .add_preformatted_with_alt("sh", concat!(
+            "mkdir cert && cd cert\n",
+            "openssl req -x509 -nodes -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365",
+        ));
 
-        Ok(Response::document(document))
-    }
-    .boxed()
+    Ok(Response::document(document))
 }

examples/routing.rs

@@ -1,6 +1,4 @@
 use anyhow::*;
-use futures_core::future::BoxFuture;
-use futures_util::FutureExt;
 use log::LevelFilter;
 use northstar::{Document, document::HeadingLevel, Request, Response, GEMINI_PORT};
 
@@ -18,25 +16,19 @@ async fn main() -> Result<()> {
         .await
 }
 
-fn handle_base(_: Request) -> BoxFuture<'static, Result<Response>> {
+async fn handle_base(_: Request) -> Result<Response> {
     let doc = generate_doc("base");
-    async move {
-        Ok(Response::document(doc))
-    }.boxed()
+    Ok(Response::document(doc))
 }
 
-fn handle_short(_: Request) -> BoxFuture<'static, Result<Response>> {
+async fn handle_short(_: Request) -> Result<Response> {
     let doc = generate_doc("short");
-    async move {
-        Ok(Response::document(doc))
-    }.boxed()
+    Ok(Response::document(doc))
 }
 
-fn handle_long(_: Request) -> BoxFuture<'static, Result<Response>> {
+async fn handle_long(_: Request) -> Result<Response> {
     let doc = generate_doc("long");
-    async move {
-        Ok(Response::document(doc))
-    }.boxed()
+    Ok(Response::document(doc))
 }
 
 fn generate_doc(route_name: &str) -> Document {

examples/serve_dir.rs

@@ -1,6 +1,4 @@
 use anyhow::*;
-use futures_core::future::BoxFuture;
-use futures_util::FutureExt;
 use log::LevelFilter;
 use northstar::{Server, Request, Response, GEMINI_PORT};
 
@@ -16,12 +14,9 @@ async fn main() -> Result<()> {
         .await
 }
 
-fn handle_request(request: Request) -> BoxFuture<'static, Result<Response>> {
-    async move {
-        let path = request.path_segments();
-        let response = northstar::util::serve_dir("public", &path).await?;
+async fn handle_request(request: Request) -> Result<Response> {
+    let path = request.path_segments();
+    let response = northstar::util::serve_dir("public", &path).await?;
 
-        Ok(response)
-    }
-    .boxed()
+    Ok(response)
 }

src/lib.rs

@@ -8,7 +8,7 @@ use std::{
     path::PathBuf,
     time::Duration,
 };
-use futures_core::future::BoxFuture;
+use futures_core::future::{BoxFuture, Future};
 use tokio::{
     prelude::*,
     io::{self, BufStream},
@@ -290,11 +290,13 @@ impl<A: ToSocketAddrs> Builder<A> {
     /// "endpoint".  Entering a relative or malformed path will result in a panic.
     ///
     /// For more information about routing mechanics, see the docs for [`RoutingNode`].
-    pub fn add_route<H>(mut self, path: &'static str, handler: H) -> Self
+    pub fn add_route<F, H>(mut self, path: &'static str, handler: H) -> Self
     where
-        H: Fn(Request) -> HandlerResponse + Send + Sync + 'static,
+        H: Send + Sync + 'static + Fn(Request) -> F,
+        F: Send + Sync + 'static + Future<Output = Result<Response>>
     {
-        self.routes.add_route(path, Arc::new(handler));
+        let wrapped = Arc::new(move|req| Box::pin((handler)(req)) as HandlerResponse);
+        self.routes.add_route(path, wrapped);
         self
     }