Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project licenses this file to you under the Apache License, * version 2.0 (the "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ package io.netty.handler.codec.http; import static io.netty.handler.codec.http.HttpHeaderValues.DEFLATE; import static io.netty.handler.codec.http.HttpHeaderValues.GZIP; import static io.netty.handler.codec.http.HttpHeaderValues.X_DEFLATE; import static io.netty.handler.codec.http.HttpHeaderValues.X_GZIP; import io.netty.channel.embedded.EmbeddedChannel; import io.netty.handler.codec.compression.ZlibCodecFactory; import io.netty.handler.codec.compression.ZlibWrapper; /** * Decompresses an {@link HttpMessage} and an {@link HttpContent} compressed in * {@code gzip} or {@code deflate} encoding. For more information on how this * handler modifies the message, please refer to {@link HttpContentDecoder}. */ public class HttpContentDecompressor extends HttpContentDecoder { private final boolean strict; /** * Create a new {@link HttpContentDecompressor} in non-strict mode. */ public HttpContentDecompressor() { this(false); } /** * Create a new {@link HttpContentDecompressor}. * * @param strict if {@code true} use strict handling of deflate if used, otherwise handle it in a * more lenient fashion. */ public HttpContentDecompressor(boolean strict) { this.strict = strict; } @Override protected EmbeddedChannel newContentDecoder(String contentEncoding) throws Exception { if (GZIP.contentEqualsIgnoreCase(contentEncoding) || X_GZIP.contentEqualsIgnoreCase(contentEncoding)) { return new EmbeddedChannel(ctx.channel().id(), ctx.channel().metadata().hasDisconnect(), ctx.channel().config(), ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP)); } if (DEFLATE.contentEqualsIgnoreCase(contentEncoding) || X_DEFLATE.contentEqualsIgnoreCase(contentEncoding)) { final ZlibWrapper wrapper = strict ? ZlibWrapper.ZLIB : ZlibWrapper.ZLIB_OR_NONE; // To be strict, 'deflate' means ZLIB, but some servers were not implemented correctly. return new EmbeddedChannel(ctx.channel().id(), ctx.channel().metadata().hasDisconnect(), ctx.channel().config(), ZlibCodecFactory.newZlibDecoder(wrapper)); } // 'identity' or unsupported return null; } }