Add zstd compression support

tests/compression/Cargo.toml

@@ -11,11 +11,12 @@ bytes = "1"
 http = "0.2"
 http-body = "0.4"
 hyper = "0.14.3"
+paste = "1.0.12"
 pin-project = "1.0"
 prost = "0.12"
 tokio = {version = "1.0", features = ["macros", "rt-multi-thread", "net"]}
 tokio-stream = "0.1"
-tonic = {path = "../../tonic", features = ["gzip"]}
+tonic = {path = "../../tonic", features = ["gzip", "zstd"]}
 tower = {version = "0.4", features = []}
 tower-http = {version = "0.4", features = ["map-response-body", "map-request-body"]}
 

tests/compression/src/bidirectional_stream.rs

@@ -1,20 +1,45 @@
 use super::*;
+use http_body::Body;
 use tonic::codec::CompressionEncoding;
 
-#[tokio::test(flavor = "multi_thread")]
-async fn client_enabled_server_enabled() {
+util::parametrized_tests! {
+    client_enabled_server_enabled,
+    zstd: CompressionEncoding::Zstd,
+    gzip: CompressionEncoding::Gzip,
+}
+
+#[allow(dead_code)]
+async fn client_enabled_server_enabled(encoding: CompressionEncoding) {
     let (client, server) = tokio::io::duplex(UNCOMPRESSED_MIN_BODY_SIZE * 10);
 
     let svc = test_server::TestServer::new(Svc::default())
-        .accept_compressed(CompressionEncoding::Gzip)
-        .send_compressed(CompressionEncoding::Gzip);
+        .accept_compressed(encoding)
+        .send_compressed(encoding);
 
     let request_bytes_counter = Arc::new(AtomicUsize::new(0));
     let response_bytes_counter = Arc::new(AtomicUsize::new(0));
 
-    fn assert_right_encoding<B>(req: http::Request<B>) -> http::Request<B> {
-        assert_eq!(req.headers().get("grpc-encoding").unwrap(), "gzip");
-        req
+    #[derive(Clone)]
+    pub struct AssertRightEncoding {
+        encoding: CompressionEncoding,
+    }
+
+    #[allow(dead_code)]
+    impl AssertRightEncoding {
+        pub fn new(encoding: CompressionEncoding) -> Self {
+            Self { encoding }
+        }
+
+        pub fn call<B: Body>(self, req: http::Request<B>) -> http::Request<B> {
+            let expected = match self.encoding {
+                CompressionEncoding::Gzip => "gzip",
+                CompressionEncoding::Zstd => "zstd",
+                _ => panic!("unexpected encoding {:?}", self.encoding),
+            };
+            assert_eq!(req.headers().get("grpc-encoding").unwrap(), expected);
+
+            req
+        }
     }
 
     tokio::spawn({
@@ -24,7 +49,9 @@ async fn client_enabled_server_enabled() {
             Server::builder()
                 .layer(
                     ServiceBuilder::new()
-                        .map_request(assert_right_encoding)
+                        .map_request(move |req| {
+                            AssertRightEncoding::new(encoding).clone().call(req)
+                        })
                         .layer(measure_request_body_size_layer(
                             request_bytes_counter.clone(),
                         ))
@@ -44,8 +71,8 @@ async fn client_enabled_server_enabled() {
     });
 
     let mut client = test_client::TestClient::new(mock_io_channel(client).await)
-        .send_compressed(CompressionEncoding::Gzip)
-        .accept_compressed(CompressionEncoding::Gzip);
+        .send_compressed(encoding)
+        .accept_compressed(encoding);
 
     let data = [0_u8; UNCOMPRESSED_MIN_BODY_SIZE].to_vec();
     let stream = tokio_stream::iter(vec![SomeData { data: data.clone() }, SomeData { data }]);
@@ -56,7 +83,12 @@ async fn client_enabled_server_enabled() {
         .await
         .unwrap();
 
-    assert_eq!(res.metadata().get("grpc-encoding").unwrap(), "gzip");
+    let expected = match encoding {
+        CompressionEncoding::Gzip => "gzip",
+        CompressionEncoding::Zstd => "zstd",
+        _ => panic!("unexpected encoding {:?}", encoding),
+    };
+    assert_eq!(res.metadata().get("grpc-encoding").unwrap(), expected);
 
     let mut stream: Streaming<SomeData> = res.into_inner();
 

tests/compression/src/client_stream.rs

@@ -1,19 +1,42 @@
 use super::*;
-use http_body::Body as _;
+use http_body::Body;
 use tonic::codec::CompressionEncoding;
 
-#[tokio::test(flavor = "multi_thread")]
-async fn client_enabled_server_enabled() {
+util::parametrized_tests! {
+    client_enabled_server_enabled,
+    zstd: CompressionEncoding::Zstd,
+    gzip: CompressionEncoding::Gzip,
+}
+
+#[allow(dead_code)]
+async fn client_enabled_server_enabled(encoding: CompressionEncoding) {
     let (client, server) = tokio::io::duplex(UNCOMPRESSED_MIN_BODY_SIZE * 10);
 
-    let svc =
-        test_server::TestServer::new(Svc::default()).accept_compressed(CompressionEncoding::Gzip);
+    let svc = test_server::TestServer::new(Svc::default()).accept_compressed(encoding);
 
     let request_bytes_counter = Arc::new(AtomicUsize::new(0));
 
-    fn assert_right_encoding<B>(req: http::Request<B>) -> http::Request<B> {
-        assert_eq!(req.headers().get("grpc-encoding").unwrap(), "gzip");
-        req
+    #[derive(Clone)]
+    pub struct AssertRightEncoding {
+        encoding: CompressionEncoding,
+    }
+
+    #[allow(dead_code)]
+    impl AssertRightEncoding {
+        pub fn new(encoding: CompressionEncoding) -> Self {
+            Self { encoding }
+        }
+
+        pub fn call<B: Body>(self, req: http::Request<B>) -> http::Request<B> {
+            let expected = match self.encoding {
+                CompressionEncoding::Gzip => "gzip",
+                CompressionEncoding::Zstd => "zstd",
+                _ => panic!("unexpected encoding {:?}", self.encoding),
+            };
+            assert_eq!(req.headers().get("grpc-encoding").unwrap(), expected);
+
+            req
+        }
     }
 
     tokio::spawn({
@@ -22,7 +45,9 @@ async fn client_enabled_server_enabled() {
             Server::builder()
                 .layer(
                     ServiceBuilder::new()
-                        .map_request(assert_right_encoding)
+                        .map_request(move |req| {
+                            AssertRightEncoding::new(encoding).clone().call(req)
+                        })
                         .layer(measure_request_body_size_layer(
                             request_bytes_counter.clone(),
                         ))
@@ -35,8 +60,8 @@ async fn client_enabled_server_enabled() {
         }
     });
 
-    let mut client = test_client::TestClient::new(mock_io_channel(client).await)
-        .send_compressed(CompressionEncoding::Gzip);
+    let mut client =
+        test_client::TestClient::new(mock_io_channel(client).await).send_compressed(encoding);
 
     let data = [0_u8; UNCOMPRESSED_MIN_BODY_SIZE].to_vec();
     let stream = tokio_stream::iter(vec![SomeData { data: data.clone() }, SomeData { data }]);
@@ -48,12 +73,17 @@ async fn client_enabled_server_enabled() {
     assert!(bytes_sent < UNCOMPRESSED_MIN_BODY_SIZE);
 }
 
-#[tokio::test(flavor = "multi_thread")]
-async fn client_disabled_server_enabled() {
+util::parametrized_tests! {
+    client_disabled_server_enabled,
+    zstd: CompressionEncoding::Zstd,
+    gzip: CompressionEncoding::Gzip,
+}
+
+#[allow(dead_code)]
+async fn client_disabled_server_enabled(encoding: CompressionEncoding) {
     let (client, server) = tokio::io::duplex(UNCOMPRESSED_MIN_BODY_SIZE * 10);
 
-    let svc =
-        test_server::TestServer::new(Svc::default()).accept_compressed(CompressionEncoding::Gzip);
+    let svc = test_server::TestServer::new(Svc::default()).accept_compressed(encoding);
 
     let request_bytes_counter = Arc::new(AtomicUsize::new(0));
 
@@ -93,8 +123,14 @@ async fn client_disabled_server_enabled() {
     assert!(bytes_sent > UNCOMPRESSED_MIN_BODY_SIZE);
 }
 
-#[tokio::test(flavor = "multi_thread")]
-async fn client_enabled_server_disabled() {
+util::parametrized_tests! {
+    client_enabled_server_disabled,
+    zstd: CompressionEncoding::Zstd,
+    gzip: CompressionEncoding::Gzip,
+}
+
+#[allow(dead_code)]
+async fn client_enabled_server_disabled(encoding: CompressionEncoding) {
     let (client, server) = tokio::io::duplex(UNCOMPRESSED_MIN_BODY_SIZE * 10);
 
     let svc = test_server::TestServer::new(Svc::default());
@@ -107,8 +143,8 @@ async fn client_enabled_server_disabled() {
             .unwrap();
     });
 
-    let mut client = test_client::TestClient::new(mock_io_channel(client).await)
-        .send_compressed(CompressionEncoding::Gzip);
+    let mut client =
+        test_client::TestClient::new(mock_io_channel(client).await).send_compressed(encoding);
 
     let data = [0_u8; UNCOMPRESSED_MIN_BODY_SIZE].to_vec();
     let stream = tokio_stream::iter(vec![SomeData { data: data.clone() }, SomeData { data }]);
@@ -117,18 +153,31 @@ async fn client_enabled_server_disabled() {
     let status = client.compress_input_client_stream(req).await.unwrap_err();
 
     assert_eq!(status.code(), tonic::Code::Unimplemented);
+    let expected = match encoding {
+        CompressionEncoding::Gzip => "gzip",
+        CompressionEncoding::Zstd => "zstd",
+        _ => panic!("unexpected encoding {:?}", encoding),
+    };
     assert_eq!(
         status.message(),
-        "Content is compressed with `gzip` which isn't supported"
+        format!(
+            "Content is compressed with `{}` which isn't supported",
+            expected
+        )
     );
 }
 
-#[tokio::test(flavor = "multi_thread")]
-async fn compressing_response_from_client_stream() {
+util::parametrized_tests! {
+    compressing_response_from_client_stream,
+    zstd: CompressionEncoding::Zstd,
+    gzip: CompressionEncoding::Gzip,
+}
+
+#[allow(dead_code)]
+async fn compressing_response_from_client_stream(encoding: CompressionEncoding) {
     let (client, server) = tokio::io::duplex(UNCOMPRESSED_MIN_BODY_SIZE * 10);
 
-    let svc =
-        test_server::TestServer::new(Svc::default()).send_compressed(CompressionEncoding::Gzip);
+    let svc = test_server::TestServer::new(Svc::default()).send_compressed(encoding);
 
     let response_bytes_counter = Arc::new(AtomicUsize::new(0));
 
@@ -153,13 +202,18 @@ async fn compressing_response_from_client_stream() {
         }
     });
 
-    let mut client = test_client::TestClient::new(mock_io_channel(client).await)
-        .accept_compressed(CompressionEncoding::Gzip);
+    let mut client =
+        test_client::TestClient::new(mock_io_channel(client).await).accept_compressed(encoding);
 
     let req = Request::new(Box::pin(tokio_stream::empty()));
 
     let res = client.compress_output_client_stream(req).await.unwrap();
-    assert_eq!(res.metadata().get("grpc-encoding").unwrap(), "gzip");
+    let expected = match encoding {
+        CompressionEncoding::Gzip => "gzip",
+        CompressionEncoding::Zstd => "zstd",
+        _ => panic!("unexpected encoding {:?}", encoding),
+    };
+    assert_eq!(res.metadata().get("grpc-encoding").unwrap(), expected);
     let bytes_sent = response_bytes_counter.load(SeqCst);
     assert!(bytes_sent < UNCOMPRESSED_MIN_BODY_SIZE);
 }