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Supports gzip, deflate, zstd compression level setting
- gzip: only the range 0 to 9 is allowed - deflate: only the range 0 to 9 is allowed - zstd: only the range -7 to 22 is allowed brotli and snappy compression are supported by default. fix: reactor#3244
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178
reactor-netty-http/src/main/java/reactor/netty/http/server/HttpCompressionSettingsSpec.java
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| @@ -0,0 +1,178 @@ | ||
| /* | ||
| * Copyright (c) 2020-2023 VMware, Inc. or its affiliates, All Rights Reserved. | ||
| * | ||
| * Licensed 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 reactor.netty.http.server; | ||
|
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
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| import io.netty.handler.codec.compression.Brotli; | ||
| import io.netty.handler.codec.compression.BrotliOptions; | ||
| import io.netty.handler.codec.compression.CompressionOptions; | ||
| import io.netty.handler.codec.compression.DeflateOptions; | ||
| import io.netty.handler.codec.compression.GzipOptions; | ||
| import io.netty.handler.codec.compression.SnappyOptions; | ||
| import io.netty.handler.codec.compression.StandardCompressionOptions; | ||
| import io.netty.handler.codec.compression.Zstd; | ||
| import io.netty.handler.codec.compression.ZstdOptions; | ||
| import io.netty.util.internal.ObjectUtil; | ||
|
|
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| /** | ||
| * HTTP Compression configuration builder for the {@link SimpleCompressionHandler}. | ||
| * | ||
| * @author raccoonback | ||
| */ | ||
| public final class HttpCompressionSettingsSpec { | ||
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| private final GzipOptions gzipOptions; | ||
| private final DeflateOptions deflateOptions; | ||
| private final SnappyOptions snappyOptions; | ||
| private BrotliOptions brotliOptions; | ||
| private ZstdOptions zstdOptions; | ||
|
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| private HttpCompressionSettingsSpec() { | ||
| gzipOptions = StandardCompressionOptions.gzip(); | ||
| deflateOptions = StandardCompressionOptions.deflate(); | ||
| snappyOptions = StandardCompressionOptions.snappy(); | ||
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| if (Brotli.isAvailable()) { | ||
| brotliOptions = StandardCompressionOptions.brotli(); | ||
| } | ||
|
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| if (Zstd.isAvailable()) { | ||
| zstdOptions = StandardCompressionOptions.zstd(); | ||
| } | ||
| } | ||
|
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| private HttpCompressionSettingsSpec(Build build) { | ||
| gzipOptions = build.gzipOptions; | ||
| deflateOptions = build.gzipOptions; | ||
| snappyOptions = StandardCompressionOptions.snappy(); | ||
|
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| if (Brotli.isAvailable()) { | ||
| brotliOptions = StandardCompressionOptions.brotli(); | ||
| } | ||
|
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| if (Zstd.isAvailable() && build.zstdOptions != null) { | ||
| zstdOptions = build.zstdOptions; | ||
| } | ||
| } | ||
|
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| /** | ||
| * Creates a builder for {@link HttpCompressionSettingsSpec}. | ||
| * | ||
| * @return a new {@link HttpCompressionSettingsSpec.Builder} | ||
| */ | ||
| public static Builder builder() { | ||
| return new Build(); | ||
| } | ||
|
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| static HttpCompressionSettingsSpec provideDefault() { | ||
| return new HttpCompressionSettingsSpec(); | ||
| } | ||
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| CompressionOptions[] adaptToOptions() { | ||
| List<CompressionOptions> options = new ArrayList<>(); | ||
| options.add(this.gzipOptions); | ||
| options.add(this.deflateOptions); | ||
| options.add(this.snappyOptions); | ||
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| if (brotliOptions != null) { | ||
| options.add(this.brotliOptions); | ||
| } | ||
|
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| if (zstdOptions != null) { | ||
| options.add(this.zstdOptions); | ||
| } | ||
|
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| return options.toArray(new CompressionOptions[0]); | ||
| } | ||
|
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| public interface Builder { | ||
|
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| /** | ||
| * Build a new {@link HttpCompressionSettingsSpec}. | ||
| * | ||
| * @return a new {@link HttpCompressionSettingsSpec} | ||
| */ | ||
| HttpCompressionSettingsSpec build(); | ||
|
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| /** | ||
| * Sets the gzip compression level. | ||
| * | ||
| * @return a new {@link HttpCompressionSettingsSpec.Builder} | ||
| */ | ||
| Builder gzip(int compressionLevel); | ||
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| /** | ||
| * Sets the deflate compression level. | ||
| * | ||
| * @return a new {@link HttpCompressionSettingsSpec.Builder} | ||
| */ | ||
| Builder deflate(int compressionLevel); | ||
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| /** | ||
| * Sets the zstd compression level. | ||
| * | ||
| * @return a new {@link HttpCompressionSettingsSpec.Builder} | ||
| */ | ||
| Builder zstd(int compressionLevel); | ||
| } | ||
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| private static final class Build implements Builder { | ||
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| GzipOptions gzipOptions = StandardCompressionOptions.gzip(); | ||
| DeflateOptions deflateOptions = StandardCompressionOptions.deflate(); | ||
| ZstdOptions zstdOptions; | ||
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| private static final int DEFLATE_DEFAULT_WINDOW_BITS = 15; | ||
| private static final int DEFLATE_DEFAULT_MEMORY_LEVEL = 8; | ||
| private static final int ZSTD_DEFAULT_COMPRESSION_LEVEL = 3; | ||
| private static final int ZSTD_DEFAULT_BLOCK_SIZE = 65536; | ||
| private static final int ZSTD_MAX_BLOCK_SIZE = 1 << ZSTD_DEFAULT_COMPRESSION_LEVEL + 7 + 15; | ||
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| @Override | ||
| public HttpCompressionSettingsSpec build() { | ||
| return new HttpCompressionSettingsSpec(this); | ||
| } | ||
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| @Override | ||
| public Builder gzip(int compressionLevel) { | ||
| ObjectUtil.checkInRange(compressionLevel, 0, 9, "compressionLevel"); | ||
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| gzipOptions = StandardCompressionOptions.gzip(compressionLevel, DEFLATE_DEFAULT_WINDOW_BITS, DEFLATE_DEFAULT_MEMORY_LEVEL); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder deflate(int compressionLevel) { | ||
| ObjectUtil.checkInRange(compressionLevel, 0, 9, "compressionLevel"); | ||
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| this.deflateOptions = StandardCompressionOptions.deflate(compressionLevel, DEFLATE_DEFAULT_WINDOW_BITS, DEFLATE_DEFAULT_MEMORY_LEVEL); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder zstd(int compressionLevel) { | ||
| if (!Zstd.isAvailable()) { | ||
| throw new IllegalStateException("Unable to set compression level on zstd."); | ||
| } | ||
| ObjectUtil.checkInRange(compressionLevel, -7, 22, "compressionLevel"); | ||
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| this.zstdOptions = StandardCompressionOptions.zstd(compressionLevel, ZSTD_DEFAULT_BLOCK_SIZE, ZSTD_MAX_BLOCK_SIZE); | ||
| return this; | ||
| } | ||
| } | ||
| } |
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