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

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

@@ -62,7 +62,7 @@ jobs:
           set -e
           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,rustls-0_22,openssl -- --skip=test_reading_deflate_encoding_large_random_rustls
+          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,rustls-0_22,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

@@ -76,7 +76,7 @@ jobs:
           set -e
           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,rustls-0_22,openssl -- --skip=test_reading_deflate_encoding_large_random_rustls
+          cargo test --lib --tests -p=actix-web --features=rustls-0_20,rustls-0_21,rustls-0_22,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

@@ -66,6 +66,9 @@ rustls-0_21 = ["actix-tls/accept", "actix-tls/rustls-0_21"]
 # TLS via Rustls v0.22
 rustls-0_22 = ["actix-tls/accept", "actix-tls/rustls-0_22"]
 
+# Proxy protocol support
+proxy-protocol = ["ppp"]
+
 # Compression codecs
 compress-brotli = ["__compress", "brotli"]
 compress-gzip   = ["__compress", "flate2"]
@@ -111,13 +114,16 @@ rand = { version = "0.8", optional = true }
 sha1 = { version = "0.10", optional = true }
 
 # openssl/rustls
-actix-tls = { version = "3.3", default-features = false, optional = true }
+actix-tls = { version = "3.1", default-features = false, optional = true }
 
 # compress-*
 brotli = { version = "3.3.3", optional = true }
 flate2 = { version = "1.0.13", optional = true }
 zstd = { version = "0.13", optional = true }
 
+# Proxy protocol support
+ppp = { version = "0.2", optional = true }
+
 [dev-dependencies]
 actix-http-test = { version = "3", features = ["openssl"] }
 actix-server = "2"

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 =
+        let settings = ServiceConfig::new(
-            ServiceConfig::new(KeepAlive::Os, Duration::ZERO, Duration::ZERO, false, None);
+            KeepAlive::Os,
+            Duration::ZERO,
+            Duration::ZERO,
+            false,
+            None,
+            false,
+        );
 
         yield_now().await;
 

actix-http/src/h1/codec.rs

@@ -10,6 +10,8 @@ use super::{
     encoder, Message, MessageType,
 };
 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)]
@@ -110,6 +112,7 @@ 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))),
@@ -119,7 +122,19 @@ impl Decoder for Codec {
                 }
                 None => None,
             })
-        } else if let Some((req, payload)) = self.decoder.decode(src)? {
+        } 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;
@@ -131,6 +146,13 @@ impl Decoder for Codec {
                     self.conn_type = ConnectionType::Close
                 }
 
+                #[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),
@@ -145,6 +167,7 @@ impl Decoder for Codec {
             }
         }
     }
+}
 
 impl Encoder<Message<(Response<()>, BodySize)>> for Codec {
     type Error = io::Error;

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;

actix-http/src/proxy_protocol.rs

@@ -0,0 +1,177 @@
+use bytes::{Bytes, BytesMut};
+pub use ppp::{
+    v1::Addresses as V1Addresses,
+    v2::{Addresses as V2Addresses, Command, Protocol, Type as TlvType},
+};
+use tracing::trace;
+
+use crate::error::ParseError;
+
+const V1_PREFIX_LEN: usize = 5;
+const V1_MAX_LEN: usize = 107;
+const V2_PREFIX_LEN: usize = 12;
+const V2_MIN_LEN: usize = 16;
+const V2_LEN_INDEX_1: usize = 14;
+const V2_LEN_INDEX_2: usize = 15;
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum ProxyProtocol {
+    V1(ProxyProtocolV1),
+    V2(ProxyProtocolV2),
+}
+
+impl ProxyProtocol {
+    pub(crate) fn decode(src: &mut BytesMut) -> Result<Option<Self>, ParseError> {
+        if src.len() >= V1_PREFIX_LEN
+            && &src[..V1_PREFIX_LEN] == ppp::v1::PROTOCOL_PREFIX.as_bytes()
+        {
+            if let Some(line_end) = src.iter().position(|b| *b == b'\r') {
+                if let Some(delimiter) = src.get(line_end + 1) {
+                    if delimiter == &b'\n' {
+                        let proxy_line = src.split_to(line_end + 2).freeze();
+
+                        if proxy_line.len() > V1_MAX_LEN {
+                            trace!("proxy protocol header too long");
+                            return Err(ParseError::Header);
+                        }
+
+                        match ppp::v1::Header::try_from(&proxy_line[..]) {
+                            Ok(header) => Ok(Some(
+                                ProxyProtocolV1 {
+                                    addresses: header.addresses,
+                                }
+                                .into(),
+                            )),
+                            Err(e) => {
+                                trace!("error parsing proxy protocol v1 header: {:?}", e);
+                                Err(ParseError::Header)
+                            }
+                        }
+                    } else {
+                        trace!("invalid line ending found");
+                        Err(ParseError::Header)
+                    }
+                } else {
+                    trace!("no line ending found, might be a partial request");
+                    Ok(None)
+                }
+            } else if src.len() > V1_MAX_LEN {
+                trace!("proxy protocol header too long");
+                Err(ParseError::Header)
+            } else {
+                trace!("no line ending found, might be a partial request");
+                Ok(None)
+            }
+        } else if src.len() >= V2_PREFIX_LEN && &src[..V2_PREFIX_LEN] == ppp::v2::PROTOCOL_PREFIX {
+            if src.len() < V2_MIN_LEN {
+                return Ok(None);
+            }
+
+            let total_length = V2_MIN_LEN
+                + u16::from_be_bytes([src[V2_LEN_INDEX_1], src[V2_LEN_INDEX_2]]) as usize;
+
+            if src.len() < total_length {
+                return Ok(None);
+            }
+
+            let proxy_line = src.split_to(total_length).freeze();
+
+            match ppp::v2::Header::try_from(&proxy_line[..]) {
+                Ok(header) => {
+                    let size_hint = header.tlvs().size_hint();
+                    let mut converted_tlvs: Vec<Tlv> =
+                        Vec::with_capacity(size_hint.1.unwrap_or(size_hint.0));
+
+                    for tlv in header.tlvs() {
+                        match tlv {
+                            Ok(tlv) => {
+                                converted_tlvs.push(tlv.into());
+                            }
+                            Err(e) => {
+                                trace!(
+                                    "error parsing proxy protocol v2 type length value: {:?}",
+                                    e
+                                );
+                                return Err(ParseError::Header);
+                            }
+                        }
+                    }
+
+                    Ok(Some(
+                        ProxyProtocolV2 {
+                            addresses: header.addresses,
+                            command: header.command,
+                            protocol: header.protocol,
+                            tlvs: converted_tlvs,
+                        }
+                        .into(),
+                    ))
+                }
+                Err(e) => {
+                    trace!("error parsing proxy protocol v1 header: {:?}", e);
+                    return Err(ParseError::Header);
+                }
+            }
+        } else if src.len() < V1_PREFIX_LEN || src.len() < V2_PREFIX_LEN {
+            trace!("not enough data to parse proxy protocol header");
+            Ok(None)
+        } else {
+            trace!("invalid proxy protocol header");
+            Err(ParseError::Header)
+        }
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct ProxyProtocolV1 {
+    pub addresses: V1Addresses,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct ProxyProtocolV2 {
+    pub addresses: V2Addresses,
+    pub command: Command,
+    pub protocol: Protocol,
+    pub tlvs: Vec<Tlv>,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Tlv {
+    pub kind: TlvType,
+    pub value: bytes::Bytes,
+}
+
+impl From<ProxyProtocolV1> for ProxyProtocol {
+    fn from(v1: ProxyProtocolV1) -> Self {
+        ProxyProtocol::V1(v1)
+    }
+}
+
+impl From<ProxyProtocolV2> for ProxyProtocol {
+    fn from(v2: ProxyProtocolV2) -> Self {
+        ProxyProtocol::V2(v2)
+    }
+}
+
+impl From<ppp::v2::TypeLengthValue<'_>> for Tlv {
+    fn from(tlv: ppp::v2::TypeLengthValue<'_>) -> Self {
+        Tlv {
+            kind: match tlv.kind {
+                0x01 => TlvType::ALPN,
+                0x02 => TlvType::Authority,
+                0x03 => TlvType::CRC32C,
+                0x04 => TlvType::NoOp,
+                0x05 => TlvType::UniqueId,
+                0x20 => TlvType::SSL,
+                0x21 => TlvType::SSLVersion,
+                0x22 => TlvType::SSLCommonName,
+                0x23 => TlvType::SSLCipher,
+                0x24 => TlvType::SSLSignatureAlgorithm,
+                0x25 => TlvType::SSLKeyAlgorithm,
+                0x30 => TlvType::NetworkNamespace,
+                _ => unreachable!(),
+            },
+            value: Bytes::copy_from_slice(&tlv.value),
+        }
+    }
+}

actix-test/src/lib.rs

@@ -173,6 +173,7 @@ where
 
                         HttpService::build()
                             .client_request_timeout(timeout)
+                            .proxy_protocol(srv_cfg.proxy_protocol)
                             .h1(map_config(fac, move |_| app_cfg.clone()))
                             .tcp()
                     }),
@@ -461,6 +462,7 @@ pub struct TestServerConfig {
     client_request_timeout: Duration,
     port: u16,
     workers: usize,
+    proxy_protocol: bool,
 }
 
 impl Default for TestServerConfig {
@@ -478,6 +480,7 @@ impl TestServerConfig {
             client_request_timeout: Duration::from_secs(5),
             port: 0,
             workers: 1,
+            proxy_protocol: false,
         }
     }
 
@@ -558,6 +561,14 @@ impl TestServerConfig {
         self.workers = workers;
         self
     }
+
+    /// Enable proxy protocol support.
+    ///
+    /// By default, the server does not use proxy protocol.
+    pub fn proxy_protocol(mut self) -> Self {
+        self.proxy_protocol = true;
+        self
+    }
 }
 
 /// A basic HTTP server controller that simplifies the process of writing integration tests for

actix-web/Cargo.toml

@@ -72,6 +72,9 @@ rustls-0_21 = ["http2", "actix-http/rustls-0_21", "actix-tls/accept", "actix-tls
 # TLS via Rustls v0.22
 rustls-0_22 = ["http2", "actix-http/rustls-0_22", "actix-tls/accept", "actix-tls/rustls-0_22"]
 
+# Proxy protocol support
+proxy-protocol = ["actix-http/proxy-protocol"]
+
 # Internal (PRIVATE!) features used to aid testing and checking feature status.
 # Don't rely on these whatsoever. They may disappear at anytime.
 __compress = []
@@ -145,6 +148,10 @@ required-features = ["compress-brotli", "compress-gzip", "compress-zstd", "cooki
 name = "compression"
 required-features = ["compress-brotli", "compress-gzip", "compress-zstd"]
 
+[[test]]
+name = "proxy_protocol"
+required-features = ["proxy-protocol"]
+
 [[example]]
 name = "basic"
 required-features = ["compress-gzip"]

actix-web/src/server.rs

@@ -36,6 +36,7 @@ struct Config {
     client_disconnect_timeout: Duration,
     #[allow(dead_code)] // only dead when no TLS features are enabled
     tls_handshake_timeout: Option<Duration>,
+    proxy_protocol: bool,
 }
 
 /// An HTTP Server.
@@ -119,6 +120,7 @@ where
                 client_request_timeout: Duration::from_secs(5),
                 client_disconnect_timeout: Duration::from_secs(1),
                 tls_handshake_timeout: None,
+                proxy_protocol: false,
             })),
             backlog: 1024,
             sockets: Vec::new(),
@@ -155,6 +157,21 @@ where
         self
     }
 
+    /// Sets if the server should use the PROXY protocol.
+    pub fn proxy_protocol(self, enabled: bool) -> Self {
+        #[cfg(not(feature = "proxy-protocol"))]
+        {
+            if enabled {
+                panic!(
+                    "Proxy protocol support is not enabled. Enable the `proxy-protocol` feature."
+                )
+            }
+        }
+
+        self.config.lock().unwrap().proxy_protocol = enabled;
+        self
+    }
+
     /// Sets the maximum number of pending connections.
     ///
     /// This refers to the number of clients that can be waiting to be served. Exceeding this number
@@ -513,6 +530,7 @@ where
                         .keep_alive(cfg.keep_alive)
                         .client_request_timeout(cfg.client_request_timeout)
                         .client_disconnect_timeout(cfg.client_disconnect_timeout)
+                        .proxy_protocol(cfg.proxy_protocol)
                         .local_addr(addr);
 
                     if let Some(handler) = on_connect_fn.clone() {

actix-web/tests/proxy_protocol.rs

@@ -0,0 +1,113 @@
+use std::{
+    io::{Read, Write},
+    net::{Ipv4Addr, Shutdown, TcpStream},
+};
+
+use actix_http::proxy_protocol::{
+    Command, Protocol, ProxyProtocol, ProxyProtocolV1, ProxyProtocolV2, TlvType, V1Addresses,
+    V2Addresses,
+};
+use actix_test::TestServerConfig;
+use actix_web::{get, App, HttpMessage, HttpRequest, HttpResponse, Responder};
+
+#[get("/v1")]
+async fn proxy_protocol_v1(req: HttpRequest) -> impl Responder {
+    let extensions = req.extensions();
+    let proxy_protocol = extensions.get::<ProxyProtocol>().unwrap();
+
+    if let ProxyProtocol::V1(ProxyProtocolV1 {
+        addresses: V1Addresses::Tcp4(addr),
+    }) = proxy_protocol
+    {
+        if addr.source_address == Ipv4Addr::new(127, 0, 1, 2)
+            && addr.destination_address == Ipv4Addr::new(192, 168, 1, 101)
+            && addr.source_port == 80
+            && addr.destination_port == 443
+        {
+            return HttpResponse::Ok().body(format!("{:?}", proxy_protocol));
+        }
+    }
+
+    HttpResponse::NotFound().finish()
+}
+
+#[get("/v2")]
+async fn proxy_protocol_v2(req: HttpRequest) -> impl Responder {
+    let extensions = req.extensions();
+    let proxy_protocol = extensions.get::<ProxyProtocol>().unwrap();
+
+    if let ProxyProtocol::V2(ProxyProtocolV2 {
+        addresses: V2Addresses::IPv4(addr),
+        command,
+        protocol,
+        tlvs,
+    }) = proxy_protocol
+    {
+        if addr.source_address == Ipv4Addr::new(127, 0, 1, 2)
+            && addr.destination_address == Ipv4Addr::new(192, 168, 1, 101)
+            && addr.source_port == 80
+            && addr.destination_port == 443
+            && matches!(command, Command::Proxy)
+            && matches!(protocol, Protocol::Datagram)
+            && tlvs.len() == 1
+            && tlvs[0].kind == TlvType::NoOp
+            && tlvs[0].value[..] == [42]
+        {
+            return HttpResponse::Ok().body(format!("{:?}", proxy_protocol));
+        }
+    }
+
+    HttpResponse::NotFound().finish()
+}
+
+#[actix_rt::test]
+async fn test_parse_proxy_protocol_v1() {
+    let srv = actix_test::start_with(TestServerConfig::default().h1().proxy_protocol(), || {
+        App::new().service(proxy_protocol_v1)
+    });
+
+    let mut stream = TcpStream::connect(srv.addr()).unwrap();
+    stream
+        .write_all(
+            b"PROXY TCP4 127.0.1.2 192.168.1.101 80 443\r\nGET /v1 HTTP/1.1\r\n\r\n".as_ref(),
+        )
+        .unwrap();
+
+    let mut buf = [0; 1024];
+    let n = stream.read(&mut buf).unwrap();
+
+    let response = String::from_utf8_lossy(&buf[..n]);
+    println!("{}", response);
+    assert!(response.starts_with("HTTP/1.1 200 OK\r\n"));
+
+    stream.shutdown(Shutdown::Both).unwrap();
+
+    srv.stop().await;
+}
+
+#[actix_rt::test]
+async fn test_parse_proxy_protocol_v2() {
+    let srv = actix_test::start_with(TestServerConfig::default().h1().proxy_protocol(), || {
+        App::new().service(proxy_protocol_v2)
+    });
+
+    let mut stream = TcpStream::connect(srv.addr()).unwrap();
+    stream.write_all(b"\r\n\r\n\0\r\nQUIT\n".as_ref()).unwrap();
+    stream
+        .write_all(&[
+            0x21, 0x12, 0, 16, 127, 0, 1, 2, 192, 168, 1, 101, 0, 80, 1, 187, 4, 0, 1, 42,
+        ])
+        .unwrap();
+    stream.write_all(b"GET /v2 HTTP/1.1\r\n\r\n").unwrap();
+
+    let mut buf = [0; 1024];
+    let n = stream.read(&mut buf).unwrap();
+
+    let response = String::from_utf8_lossy(&buf[..n]);
+    println!("{}", response);
+    assert!(response.starts_with("HTTP/1.1 200 OK\r\n"));
+
+    stream.shutdown(Shutdown::Both).unwrap();
+
+    srv.stop().await;
+}

scripts/ci-test

@@ -14,7 +14,7 @@ save_exit_code() {
 
 save_exit_code cargo test --lib --tests -p=actix-router --all-features -- --nocapture
 save_exit_code cargo test --lib --tests -p=actix-http --all-features -- --nocapture
-save_exit_code cargo test --lib --tests -p=actix-web --features=rustls,openssl -- --nocapture
+save_exit_code cargo test --lib --tests -p=actix-web --features=rustls,openssl,proxy-protocol -- --nocapture
 save_exit_code cargo test --lib --tests -p=actix-web-codegen --all-features -- --nocapture
 save_exit_code cargo test --lib --tests -p=awc --all-features -- --nocapture
 save_exit_code cargo test --lib --tests -p=actix-http-test --all-features -- --nocapture