Update decoder.rs

actix-http/src/encoding/decoder.rs

@@ -37,18 +37,17 @@ where
     #[inline]
     pub fn new(stream: S, encoding: ContentEncoding) -> Decoder<S> {
         let decoder = match encoding {
-            ContentEncoding::Br => Some(ContentDecoder::Br(Box::new(
+            ContentEncoding::Br => Some(ContentDecoder::Br(Box::new(BrotliDecoder::new(
-                BrotliDecoder::new(Writer::new()),
+                Writer::new(),
-            ))),
+            )))),
-            ContentEncoding::Deflate => Some(ContentDecoder::Deflate(Box::new(
+            ContentEncoding::Deflate => Some(ContentDecoder::Deflate(Box::new(ZlibDecoder::new(
-                ZlibDecoder::new(Writer::new()),
+                Writer::new(),
-            ))),
+            )))),
-            ContentEncoding::Gzip => Some(ContentDecoder::Gzip(Box::new(
+            ContentEncoding::Gzip => Some(ContentDecoder::Gzip(Box::new(GzDecoder::new(
-                GzDecoder::new(Writer::new()),
+                Writer::new(),
-            ))),
+            )))),
             ContentEncoding::Zstd => Some(ContentDecoder::Zstd(Box::new(
-                ZstdDecoder::new(Writer::new())
+                ZstdDecoder::new(Writer::new()).expect(
-                    .expect(
                     "Failed to create zstd decoder. This is a bug. \
                          Please report it to the actix-web repository.",
                 ),
@@ -84,10 +83,7 @@ where
 {
     type Item = Result<Bytes, PayloadError>;
 
-    fn poll_next(
+    fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Option<Self::Item>> {
         loop {
             if let Some(ref mut fut) = self.fut {
                 let (chunk, decoder) =