DeflateFrameServerExtension Class — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/compression/DeflateFrameServerExtensionHandshaker.java lines 134–170

    private static class DeflateFrameServerExtension implements WebSocketServerExtension {

        private final String extensionName;
        private final int compressionLevel;
        private final WebSocketExtensionFilterProvider extensionFilterProvider;
        private final int maxAllocation;

        DeflateFrameServerExtension(int compressionLevel, String extensionName,
                WebSocketExtensionFilterProvider extensionFilterProvider,
                int maxAllocation) {
            this.extensionName = extensionName;
            this.compressionLevel = compressionLevel;
            this.extensionFilterProvider = extensionFilterProvider;
            this.maxAllocation = maxAllocation;
        }

        @Override
        public int rsv() {
            return RSV1;
        }

        @Override
        public WebSocketExtensionEncoder newExtensionEncoder() {
            return new PerFrameDeflateEncoder(compressionLevel, 15, false,
                                              extensionFilterProvider.encoderFilter());
        }

        @Override
        public WebSocketExtensionDecoder newExtensionDecoder() {
            return new PerFrameDeflateDecoder(false, extensionFilterProvider.decoderFilter(), maxAllocation);
        }

        @Override
        public WebSocketExtensionData newReponseData() {
            return new WebSocketExtensionData(extensionName, Collections.<String, String>emptyMap());
        }
    }