Add support for Proxy Protocol v1 & v2 for HTTP/1.x

.github/workflows/ci-post-merge.yml

@@ -60,7 +60,7 @@ jobs:
         run: |
           cargo test --lib --tests -p=actix-router --all-features
           cargo test --lib --tests -p=actix-http --all-features
-          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,openssl -- --skip=test_reading_deflate_encoding_large_random_rustls
+          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,openssl,proxy-protocol -- --skip=test_reading_deflate_encoding_large_random_rustls
           cargo test --lib --tests -p=actix-web-codegen --all-features
           cargo test --lib --tests -p=awc --all-features
           cargo test --lib --tests -p=actix-http-test --all-features

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
         run: |
           cargo test --lib --tests -p=actix-router --all-features
           cargo test --lib --tests -p=actix-http --all-features
-          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,openssl -- --skip=test_reading_deflate_encoding_large_random_rustls
+          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,openssl,proxy-protocol -- --skip=test_reading_deflate_encoding_large_random_rustls
           cargo test --lib --tests -p=actix-web-codegen --all-features
           cargo test --lib --tests -p=awc --all-features
           cargo test --lib --tests -p=actix-http-test --all-features

actix-http/Cargo.toml

@@ -53,6 +53,9 @@ rustls-0_20 = ["actix-tls/accept", "actix-tls/rustls-0_20"]
 # TLS via Rustls v0.21
 rustls-0_21 = ["actix-tls/accept", "actix-tls/rustls-0_21"]
 
+# Proxy protocol support
+proxy-protocol = ["ppp"]
+
 # Compression codecs
 compress-brotli = ["__compress", "brotli"]
 compress-gzip   = ["__compress", "flate2"]
@@ -100,6 +103,9 @@ sha1 = { version = "0.10", optional = true }
 # openssl/rustls
 actix-tls = { version = "3.1", default-features = false, optional = true }
 
+# proxy-protocol v1
+ppp = { version = "2.0", optional = true }
+
 # compress-*
 brotli = { version = "3.3.3", optional = true }
 flate2 = { version = "1.0.13", optional = true }

actix-http/src/builder.rs

@@ -23,6 +23,7 @@ pub struct HttpServiceBuilder<T, S, X = ExpectHandler, U = UpgradeHandler> {
     upgrade: Option<U>,
     on_connect_ext: Option<Rc<ConnectCallback<T>>>,
     _phantom: PhantomData<S>,
+    proxy_protocol: bool,
 }
 
 impl<T, S> Default for HttpServiceBuilder<T, S, ExpectHandler, UpgradeHandler>
@@ -46,6 +47,8 @@ where
             upgrade: None,
             on_connect_ext: None,
             _phantom: PhantomData,
+
+            proxy_protocol: false,
         }
     }
 }
@@ -124,6 +127,12 @@ where
         self.client_disconnect_timeout(dur)
     }
 
+    /// Enable `PROXY` protocol support.
+    pub fn proxy_protocol(mut self, enabled: bool) -> Self {
+        self.proxy_protocol = enabled;
+        self
+    }
+
     /// Provide service for `EXPECT: 100-Continue` support.
     ///
     /// Service get called with request that contains `EXPECT` header.
@@ -146,6 +155,7 @@ where
             upgrade: self.upgrade,
             on_connect_ext: self.on_connect_ext,
             _phantom: PhantomData,
+            proxy_protocol: self.proxy_protocol,
         }
     }
 
@@ -170,6 +180,7 @@ where
             upgrade: Some(upgrade.into_factory()),
             on_connect_ext: self.on_connect_ext,
             _phantom: PhantomData,
+            proxy_protocol: self.proxy_protocol,
         }
     }
 
@@ -201,6 +212,7 @@ where
             self.client_disconnect_timeout,
             self.secure,
             self.local_addr,
+            self.proxy_protocol,
         );
 
         H1Service::with_config(cfg, service.into_factory())
@@ -226,6 +238,7 @@ where
             self.client_disconnect_timeout,
             self.secure,
             self.local_addr,
+            self.proxy_protocol,
         );
 
         crate::h2::H2Service::with_config(cfg, service.into_factory())
@@ -248,6 +261,7 @@ where
             self.client_disconnect_timeout,
             self.secure,
             self.local_addr,
+            self.proxy_protocol,
         );
 
         HttpService::with_config(cfg, service.into_factory())

actix-http/src/config.rs

@@ -20,6 +20,7 @@ struct Inner {
     secure: bool,
     local_addr: Option<std::net::SocketAddr>,
     date_service: DateService,
+    proxy_protocol: bool,
 }
 
 impl Default for ServiceConfig {
@@ -30,6 +31,7 @@ impl Default for ServiceConfig {
             Duration::ZERO,
             false,
             None,
+            false,
         )
     }
 }
@@ -42,6 +44,7 @@ impl ServiceConfig {
         client_disconnect_timeout: Duration,
         secure: bool,
         local_addr: Option<net::SocketAddr>,
+        proxy_protocol: bool,
     ) -> ServiceConfig {
         ServiceConfig(Rc::new(Inner {
             keep_alive: keep_alive.normalize(),
@@ -50,6 +53,7 @@ impl ServiceConfig {
             secure,
             local_addr,
             date_service: DateService::new(),
+            proxy_protocol,
         }))
     }
 
@@ -73,6 +77,12 @@ impl ServiceConfig {
         self.0.keep_alive
     }
 
+    /// Proxy protocol setting.
+    #[inline]
+    pub fn proxy_protocol(&self) -> bool {
+        self.0.proxy_protocol
+    }
+
     /// Creates a time object representing the deadline for this connection's keep-alive period, if
     /// enabled.
     ///
@@ -143,8 +153,14 @@ mod tests {
 
     #[actix_rt::test]
     async fn test_date_service_update() {
-        let settings =
-            ServiceConfig::new(KeepAlive::Os, Duration::ZERO, Duration::ZERO, false, None);
+        let settings = ServiceConfig::new(
+            KeepAlive::Os,
+            Duration::ZERO,
+            Duration::ZERO,
+            false,
+            None,
+            false,
+        );
 
         yield_now().await;
 

actix-http/src/h1/codec.rs

@@ -11,6 +11,9 @@ use super::{
 };
 use crate::{body::BodySize, error::ParseError, ConnectionType, Request, Response, ServiceConfig};
 
+#[cfg(feature = "proxy-protocol")]
+use crate::{http_message::HttpMessage, proxy_protocol::ProxyProtocol};
+
 bitflags! {
     #[derive(Debug, Clone, Copy)]
     struct Flags: u8 {
@@ -110,6 +113,7 @@ impl Decoder for Codec {
     type Error = ParseError;
 
     fn decode(&mut self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
+        #[allow(clippy::collapsible_else_if)]
         if let Some(ref mut payload) = self.payload {
             Ok(match payload.decode(src)? {
                 Some(PayloadItem::Chunk(chunk)) => Some(Message::Chunk(Some(chunk))),
@@ -119,29 +123,49 @@ impl Decoder for Codec {
                 }
                 None => None,
             })
-        } else if let Some((req, payload)) = self.decoder.decode(src)? {
-            let head = req.head();
-            self.flags.set(Flags::HEAD, head.method == Method::HEAD);
-            self.version = head.version;
-            self.conn_type = head.connection_type();
-
-            if self.conn_type == ConnectionType::KeepAlive
-                && !self.flags.contains(Flags::KEEP_ALIVE_ENABLED)
-            {
-                self.conn_type = ConnectionType::Close
-            }
+        } else {
+            #[cfg(feature = "proxy-protocol")]
+            let proxy_protocol = if self.config.proxy_protocol() {
+                let p = ProxyProtocol::decode(src)?;
+                if p.is_none() {
+                    return Ok(None);
+                }
+                p
+            } else {
+                None
+            };
+
+            if let Some((req, payload)) = self.decoder.decode(src)? {
+                let head = req.head();
+                self.flags.set(Flags::HEAD, head.method == Method::HEAD);
+                self.version = head.version;
+                self.conn_type = head.connection_type();
+
+                if self.conn_type == ConnectionType::KeepAlive
+                    && !self.flags.contains(Flags::KEEP_ALIVE_ENABLED)
+                {
+                    self.conn_type = ConnectionType::Close
+                }
 
-            match payload {
-                PayloadType::None => self.payload = None,
-                PayloadType::Payload(pl) => self.payload = Some(pl),
-                PayloadType::Stream(pl) => {
-                    self.payload = Some(pl);
-                    self.flags.insert(Flags::STREAM);
+                #[cfg(feature = "proxy-protocol")]
+                // set proxy protocol
+                if let Some(proxy_protocol) = proxy_protocol {
+                    let mut extensions = req.extensions_mut();
+                    extensions.insert(proxy_protocol);
                 }
+
+                match payload {
+                    PayloadType::None => self.payload = None,
+                    PayloadType::Payload(pl) => self.payload = Some(pl),
+                    PayloadType::Stream(pl) => {
+                        self.payload = Some(pl);
+                        self.flags.insert(Flags::STREAM);
+                    }
+                }
+                Ok(Some(Message::Item(req)))
+            } else {
+                Ok(None)
             }
-            Ok(Some(Message::Item(req)))
-        } else {
-            Ok(None)
         }
     }
 }

actix-http/src/h1/dispatcher_tests.rs

@@ -84,6 +84,7 @@ async fn late_request() {
         Duration::ZERO,
         false,
         None,
+        false,
     );
     let services = HttpFlow::new(ok_service(), ExpectHandler, None);
 
@@ -151,6 +152,7 @@ async fn oneshot_connection() {
         Duration::ZERO,
         false,
         None,
+        false,
     );
     let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
 
@@ -212,6 +214,7 @@ async fn keep_alive_timeout() {
         Duration::ZERO,
         false,
         None,
+        false,
     );
     let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
 
@@ -291,6 +294,7 @@ async fn keep_alive_follow_up_req() {
         Duration::ZERO,
         false,
         None,
+        false,
     );
     let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
 
@@ -455,6 +459,7 @@ async fn pipelining_ok_then_ok() {
             Duration::from_millis(1),
             false,
             None,
+            false,
         );
 
         let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
@@ -525,6 +530,7 @@ async fn pipelining_ok_then_bad() {
             Duration::from_millis(1),
             false,
             None,
+            false,
         );
 
         let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
@@ -588,6 +594,7 @@ async fn expect_handling() {
             Duration::ZERO,
             false,
             None,
+            false,
         );
 
         let services = HttpFlow::new(echo_payload_service(), ExpectHandler, None);
@@ -665,6 +672,7 @@ async fn expect_eager() {
             Duration::ZERO,
             false,
             None,
+            false,
         );
 
         let services = HttpFlow::new(echo_path_service(), ExpectHandler, None);
@@ -748,6 +756,7 @@ async fn upgrade_handling() {
             Duration::ZERO,
             false,
             None,
+            false,
         );
 
         let services = HttpFlow::new(ok_service(), ExpectHandler, Some(TestUpgrade));

actix-http/src/lib.rs

@@ -49,6 +49,8 @@ mod message;
 #[cfg(test)]
 mod notify_on_drop;
 mod payload;
+#[cfg(feature = "proxy-protocol")]
+pub mod proxy_protocol;
 mod requests;
 mod responses;
 mod service;