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