Added HttpContentDecompressor to HttpBlobStore download pipeline. baz…

…elbuild#4575

src/main/java/com/google/devtools/build/lib/remote/blobstore/http/HttpBlobStore.java

@@ -38,6 +38,7 @@
 import io.netty.channel.socket.nio.NioSocketChannel;
 import io.netty.channel.unix.DomainSocketAddress;
 import io.netty.handler.codec.http.HttpClientCodec;
+import io.netty.handler.codec.http.HttpContentDecompressor;
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpObjectAggregator;
 import io.netty.handler.codec.http.HttpRequestEncoder;
@@ -342,6 +343,7 @@ private Future<Channel> acquireDownloadChannel() {
                     "timeout-handler",
                     new IdleTimeoutHandler(timeoutSeconds, ReadTimeoutException.INSTANCE));
                 p.addLast(new HttpClientCodec());
+                p.addLast("inflater", new HttpContentDecompressor());
                 synchronized (credentialsLock) {
                   p.addLast(new HttpDownloadHandler(creds));
                 }
@@ -372,6 +374,7 @@ private void releaseDownloadChannel(Channel ch) {
       try {
         ch.pipeline().remove(IdleTimeoutHandler.class);
         ch.pipeline().remove(HttpClientCodec.class);
+        ch.pipeline().remove(HttpContentDecompressor.class);
         ch.pipeline().remove(HttpDownloadHandler.class);
       } catch (NoSuchElementException e) {
         // If the channel is in the process of closing but not yet closed, some handlers could have