io.netty.handler.codec.http.HttpContentDecompressor Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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:
*
* https://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.BR;
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 static io.netty.handler.codec.http.HttpHeaderValues.SNAPPY;
import static io.netty.handler.codec.http.HttpHeaderValues.ZSTD;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.compression.Brotli;
import io.netty.handler.codec.compression.BrotliDecoder;
import io.netty.handler.codec.compression.SnappyFrameDecoder;
import io.netty.handler.codec.compression.ZlibCodecFactory;
import io.netty.handler.codec.compression.ZlibWrapper;
import io.netty.handler.codec.compression.Zstd;
import io.netty.handler.codec.compression.ZstdDecoder;
/**
* 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));
}
if (Brotli.isAvailable() && BR.contentEqualsIgnoreCase(contentEncoding)) {
return new EmbeddedChannel(ctx.channel().id(), ctx.channel().metadata().hasDisconnect(),
ctx.channel().config(), new BrotliDecoder());
}
if (SNAPPY.contentEqualsIgnoreCase(contentEncoding)) {
return new EmbeddedChannel(ctx.channel().id(), ctx.channel().metadata().hasDisconnect(),
ctx.channel().config(), new SnappyFrameDecoder());
}
if (Zstd.isAvailable() && ZSTD.contentEqualsIgnoreCase(contentEncoding)) {
return new EmbeddedChannel(ctx.channel().id(), ctx.channel().metadata().hasDisconnect(),
ctx.channel().config(), new ZstdDecoder());
}
// 'identity' or unsupported
return null;
}
}