Switch brotli compressor to rust. (#1197)

* Switch to a rustified version of brotli.

* Some memory optimizations.

* Make brotli not optional anymore.

Cargo.toml

@@ -16,7 +16,7 @@ exclude = [".gitignore", ".travis.yml", ".cargo/config", "appveyor.yml"]
 edition = "2018"
 
 [package.metadata.docs.rs]
-features = ["openssl", "brotli", "flate2-zlib", "secure-cookies", "client"]
+features = ["openssl", "flate2-zlib", "secure-cookies", "client"]
 
 [badges]
 travis-ci = { repository = "actix/actix-web", branch = "master" }
@@ -43,14 +43,11 @@ members = [
 ]
 
 [features]
-default = ["brotli", "flate2-zlib", "client", "fail"]
+default = ["flate2-zlib", "client", "fail"]
 
 # http client
 client = ["awc"]
 
-# brotli encoding, requires c compiler
-brotli = ["actix-http/brotli", "awc/brotli"]
-
 # miniz-sys backend for flate2 crate
 flate2-zlib = ["actix-http/flate2-zlib", "awc/flate2-zlib"]
 
@@ -111,7 +108,7 @@ actix-http-test = "1.0.0-alpha.3"
 rand = "0.7"
 env_logger = "0.6"
 serde_derive = "1.0"
-brotli2 = "0.3.2"
+brotli = "3.3.0"
 flate2 = "1.0.2"
 
 [profile.release]

actix-http/Cargo.toml

@@ -16,7 +16,7 @@ edition = "2018"
 workspace = ".."
 
 [package.metadata.docs.rs]
-features = ["openssl", "rustls", "fail", "brotli", "flate2-zlib", "secure-cookies"]
+features = ["openssl", "rustls", "fail", "flate2-zlib", "secure-cookies"]
 
 [lib]
 name = "actix_http"
@@ -31,9 +31,6 @@ openssl = ["actix-tls/openssl", "actix-connect/openssl"]
 # rustls support
 rustls = ["actix-tls/rustls", "actix-connect/rustls"]
 
-# brotli encoding, requires c compiler
-brotli = ["brotli2"]
-
 # miniz-sys backend for flate2 crate
 flate2-zlib = ["flate2/miniz-sys"]
 
@@ -88,7 +85,7 @@ time = "0.1.42"
 ring = { version = "0.16.9", optional = true }
 
 # compression
-brotli2 = { version="0.3.2", optional = true }
+brotli = "3.3.0"
 flate2 = { version="1.0.7", optional = true, default-features = false }
 
 # optional deps

actix-http/src/encoding/decoder.rs

@@ -4,8 +4,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 use actix_threadpool::{run, CpuFuture};
-#[cfg(feature = "brotli")]
+use brotli::DecompressorWriter;
-use brotli2::write::BrotliDecoder;
 use bytes::Bytes;
 #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
 use flate2::write::{GzDecoder, ZlibDecoder};
@@ -32,9 +31,8 @@ where
     #[inline]
     pub fn new(stream: S, encoding: ContentEncoding) -> Decoder<S> {
         let decoder = match encoding {
-            #[cfg(feature = "brotli")]
             ContentEncoding::Br => Some(ContentDecoder::Br(Box::new(
-                BrotliDecoder::new(Writer::new()),
+                DecompressorWriter::new(Writer::new(), 0),
             ))),
             #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
             ContentEncoding::Deflate => Some(ContentDecoder::Deflate(Box::new(
@@ -144,18 +142,16 @@ enum ContentDecoder {
     Deflate(Box<ZlibDecoder<Writer>>),
     #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
     Gzip(Box<GzDecoder<Writer>>),
-    #[cfg(feature = "brotli")]
+    Br(Box<DecompressorWriter<Writer>>),
-    Br(Box<BrotliDecoder<Writer>>),
 }
 
 impl ContentDecoder {
     #[allow(unreachable_patterns)]
     fn feed_eof(&mut self) -> io::Result<Option<Bytes>> {
         match self {
-            #[cfg(feature = "brotli")]
+            ContentDecoder::Br(ref mut decoder) => match decoder.flush() {
-            ContentDecoder::Br(ref mut decoder) => match decoder.finish() {
+                Ok(()) => {
-                Ok(mut writer) => {
+                    let b = decoder.get_mut().take();
-                    let b = writer.take();
                     if !b.is_empty() {
                         Ok(Some(b))
                     } else {
@@ -195,7 +191,6 @@ impl ContentDecoder {
     #[allow(unreachable_patterns)]
     fn feed_data(&mut self, data: Bytes) -> io::Result<Option<Bytes>> {
         match self {
-            #[cfg(feature = "brotli")]
             ContentDecoder::Br(ref mut decoder) => match decoder.write_all(&data) {
                 Ok(_) => {
                     decoder.flush()?;

actix-http/src/encoding/encoder.rs

@@ -5,8 +5,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 use actix_threadpool::{run, CpuFuture};
-#[cfg(feature = "brotli")]
+use brotli::CompressorWriter;
-use brotli2::write::BrotliEncoder;
 use bytes::Bytes;
 #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
 use flate2::write::{GzEncoder, ZlibEncoder};
@@ -177,8 +176,7 @@ enum ContentEncoder {
     Deflate(ZlibEncoder<Writer>),
     #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
     Gzip(GzEncoder<Writer>),
-    #[cfg(feature = "brotli")]
+    Br(CompressorWriter<Writer>),
-    Br(BrotliEncoder<Writer>),
 }
 
 impl ContentEncoder {
@@ -194,10 +192,12 @@ impl ContentEncoder {
                 Writer::new(),
                 flate2::Compression::fast(),
             ))),
-            #[cfg(feature = "brotli")]
+            ContentEncoding::Br => Some(ContentEncoder::Br(CompressorWriter::new(
-            ContentEncoding::Br => {
+                Writer::new(),
-                Some(ContentEncoder::Br(BrotliEncoder::new(Writer::new(), 3)))
+                0,
-            }
+                3,
+                0,
+            ))),
             _ => None,
         }
     }
@@ -205,8 +205,11 @@ impl ContentEncoder {
     #[inline]
     pub(crate) fn take(&mut self) -> Bytes {
         match *self {
-            #[cfg(feature = "brotli")]
+            ContentEncoder::Br(ref mut encoder) => {
-            ContentEncoder::Br(ref mut encoder) => encoder.get_mut().take(),
+                let mut encoder_new = CompressorWriter::new(Writer::new(), 0, 3, 0);
+                std::mem::swap(encoder, &mut encoder_new);
+                encoder_new.into_inner().freeze()
+            }
             #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
             ContentEncoder::Deflate(ref mut encoder) => encoder.get_mut().take(),
             #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
@@ -216,11 +219,7 @@ impl ContentEncoder {
 
     fn finish(self) -> Result<Bytes, io::Error> {
         match self {
-            #[cfg(feature = "brotli")]
+            ContentEncoder::Br(encoder) => Ok(encoder.into_inner().buf.freeze()),
-            ContentEncoder::Br(encoder) => match encoder.finish() {
-                Ok(writer) => Ok(writer.buf.freeze()),
-                Err(err) => Err(err),
-            },
             #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
             ContentEncoder::Gzip(encoder) => match encoder.finish() {
                 Ok(writer) => Ok(writer.buf.freeze()),
@@ -236,7 +235,6 @@ impl ContentEncoder {
 
     fn write(&mut self, data: &[u8]) -> Result<(), io::Error> {
         match *self {
-            #[cfg(feature = "brotli")]
             ContentEncoder::Br(ref mut encoder) => match encoder.write_all(data) {
                 Ok(_) => Ok(()),
                 Err(err) => {

actix-http/src/encoding/mod.rs

@@ -22,6 +22,9 @@ impl Writer {
     fn take(&mut self) -> Bytes {
         self.buf.split().freeze()
     }
+    fn freeze(self) -> Bytes {
+        self.buf.freeze()
+    }
 }
 
 impl io::Write for Writer {

awc/Cargo.toml

@@ -21,10 +21,10 @@ name = "awc"
 path = "src/lib.rs"
 
 [package.metadata.docs.rs]
-features = ["openssl", "rustls", "brotli", "flate2-zlib"]
+features = ["openssl", "rustls", "flate2-zlib"]
 
 [features]
-default = ["brotli", "flate2-zlib"]
+default = ["flate2-zlib"]
 
 # openssl
 openssl = ["open-ssl", "actix-http/openssl"]
@@ -32,9 +32,6 @@ openssl = ["open-ssl", "actix-http/openssl"]
 # rustls
 rustls = ["rust-tls", "actix-http/rustls"]
 
-# brotli encoding, requires c compiler
-brotli = ["actix-http/brotli"]
-
 # miniz-sys backend for flate2 crate
 flate2-zlib = ["actix-http/flate2-zlib"]
 
@@ -69,7 +66,7 @@ actix-http-test = { version = "1.0.0-alpha.3", features=["openssl"] }
 actix-utils = "1.0.0-alpha.3"
 actix-server = { version = "1.0.0-alpha.3" }
 actix-tls = { version = "1.0.0-alpha.3", features=["openssl", "rustls"] }
-brotli2 = { version="0.3.2" }
+brotli = "3.3.0"
 flate2 = { version="1.0.2" }
 env_logger = "0.6"
 webpki = { version = "0.21" }

awc/src/request.rs

@@ -23,13 +23,10 @@ use crate::frozen::FrozenClientRequest;
 use crate::sender::{PrepForSendingError, RequestSender, SendClientRequest};
 use crate::ClientConfig;
 
-#[cfg(any(feature = "brotli", feature = "flate2-zlib", feature = "flate2-rust"))]
+#[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
 const HTTPS_ENCODING: &str = "br, gzip, deflate";
-#[cfg(all(
+#[cfg(not(any(feature = "flate2-zlib", feature = "flate2-rust")))]
-    any(feature = "flate2-zlib", feature = "flate2-rust"),
+const HTTPS_ENCODING: &str = "br";
-    not(feature = "brotli")
-))]
-const HTTPS_ENCODING: &str = "gzip, deflate";
 
 /// An HTTP Client request builder
 ///
@@ -544,13 +541,6 @@ impl ClientRequest {
 
         let mut slf = self;
 
-        // enable br only for https
-        #[cfg(any(
-            feature = "brotli",
-            feature = "flate2-zlib",
-            feature = "flate2-rust"
-        ))]
-        {
         if slf.response_decompress {
             let https = slf
                 .head
@@ -564,12 +554,11 @@ impl ClientRequest {
             } else {
                 #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
                 {
-                        slf = slf
+                    slf =
-                            .set_header_if_none(header::ACCEPT_ENCODING, "gzip, deflate")
+                        slf.set_header_if_none(header::ACCEPT_ENCODING, "gzip, deflate")
                 }
             };
         }
-        }
 
         Ok(slf)
     }

awc/tests/test_client.rs

@@ -4,7 +4,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
 
-use brotli2::write::BrotliEncoder;
+use brotli::write::BrotliEncoder;
 use bytes::Bytes;
 use flate2::read::GzDecoder;
 use flate2::write::GzEncoder;
@@ -568,7 +568,6 @@ async fn test_client_brotli_encoding() {
 //     assert_eq!(bytes, Bytes::from(data));
 // }
 
-// #[cfg(feature = "brotli")]
 // #[actix_rt::test]
 // async fn test_client_deflate_encoding() {
 //     let srv = test::TestServer::start(|app| {

src/lib.rs

@@ -72,8 +72,6 @@
 //! * `rustls` - enables ssl support via `rustls` crate, supports `http/2`
 //! * `secure-cookies` - enables secure cookies support, includes `ring` crate as
 //!   dependency
-//! * `brotli` - enables `brotli` compression support, requires `c`
-//!   compiler (default enabled)
 //! * `flate2-zlib` - enables `gzip`, `deflate` compression support, requires
 //!   `c` compiler (default enabled)
 //! * `flate2-rust` - experimental rust based implementation for

tests/test_server.rs

@@ -6,7 +6,7 @@ use actix_http::http::header::{
 };
 use actix_http::{Error, HttpService, Response};
 use actix_http_test::TestServer;
-use brotli2::write::{BrotliDecoder, BrotliEncoder};
+use brotli::write::{BrotliDecoder, BrotliEncoder};
 use bytes::Bytes;
 use flate2::read::GzDecoder;
 use flate2::write::{GzEncoder, ZlibDecoder, ZlibEncoder};
@@ -296,7 +296,6 @@ async fn test_body_chunked_implicit() {
 }
 
 #[actix_rt::test]
-#[cfg(feature = "brotli")]
 async fn test_body_br_streaming() {
     let srv = TestServer::start(move || {
         HttpService::build()
@@ -411,7 +410,6 @@ async fn test_body_deflate() {
 }
 
 #[actix_rt::test]
-#[cfg(any(feature = "brotli"))]
 async fn test_body_brotli() {
     let srv = TestServer::start(move || {
         HttpService::build()
@@ -717,7 +715,7 @@ async fn test_brotli_encoding_large() {
     assert_eq!(bytes, Bytes::from(data));
 }
 
-// #[cfg(all(feature = "brotli", feature = "ssl"))]
+// #[cfg(feature = "ssl")]
 // #[actix_rt::test]
 // async fn test_brotli_encoding_large_ssl() {
 //     use actix::{Actor, System};