ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.compression.DeflateFrameClientExtensionHandshaker Maven / Gradle / Ivy
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Pulls down netty.io, relocates nd then makes a fat new jar with them all in it.
The newest version!
/*
* Copyright 2014 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 ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.compression;
import static ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.compression.
DeflateFrameServerExtensionHandshaker.*;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketClientExtension;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketClientExtensionHandshaker;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketExtensionData;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketExtensionDecoder;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketExtensionEncoder;
import java.util.Collections;
/**
* perframe-deflate
* handshake implementation.
*/
public final class DeflateFrameClientExtensionHandshaker implements WebSocketClientExtensionHandshaker {
private final int compressionLevel;
private final boolean useWebkitExtensionName;
/**
* Constructor with default configuration.
*/
public DeflateFrameClientExtensionHandshaker(boolean useWebkitExtensionName) {
this(6, useWebkitExtensionName);
}
/**
* Constructor with custom configuration.
*
* @param compressionLevel
* Compression level between 0 and 9 (default is 6).
*/
public DeflateFrameClientExtensionHandshaker(int compressionLevel, boolean useWebkitExtensionName) {
if (compressionLevel < 0 || compressionLevel > 9) {
throw new IllegalArgumentException(
"compressionLevel: " + compressionLevel + " (expected: 0-9)");
}
this.compressionLevel = compressionLevel;
this.useWebkitExtensionName = useWebkitExtensionName;
}
@Override
public WebSocketExtensionData newRequestData() {
return new WebSocketExtensionData(
useWebkitExtensionName ? X_WEBKIT_DEFLATE_FRAME_EXTENSION : DEFLATE_FRAME_EXTENSION,
Collections.emptyMap());
}
@Override
public WebSocketClientExtension handshakeExtension(WebSocketExtensionData extensionData) {
if (!X_WEBKIT_DEFLATE_FRAME_EXTENSION.equals(extensionData.name()) &&
!DEFLATE_FRAME_EXTENSION.equals(extensionData.name())) {
return null;
}
if (extensionData.parameters().isEmpty()) {
return new DeflateFrameClientExtension(compressionLevel);
} else {
return null;
}
}
private static class DeflateFrameClientExtension implements WebSocketClientExtension {
private final int compressionLevel;
DeflateFrameClientExtension(int compressionLevel) {
this.compressionLevel = compressionLevel;
}
@Override
public int rsv() {
return RSV1;
}
@Override
public WebSocketExtensionEncoder newExtensionEncoder() {
return new PerFrameDeflateEncoder(compressionLevel, 15, false);
}
@Override
public WebSocketExtensionDecoder newExtensionDecoder() {
return new PerFrameDeflateDecoder(false);
}
}
}