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/*
* The MIT License (MIT)
*
* Copyright (c) 2020 Artipie
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.artipie.debian.misc;
import com.artipie.asto.Concatenation;
import com.artipie.asto.Remaining;
import hu.akarnokd.rxjava2.interop.SingleInterop;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.ByteBuffer;
import java.util.concurrent.CompletionStage;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
import org.reactivestreams.Publisher;
/**
* Publisher as extension to work with archives.
* @since 0.3
*/
public final class PublisherAsArchive {
/**
* Publisher.
*/
private final Publisher content;
/**
* Ctor.
* @param content Content
*/
public PublisherAsArchive(final Publisher content) {
this.content = content;
}
/**
* Publisher as unpacked gz archive.
* @return Unpacked bytes
*/
@SuppressWarnings("PMD.AssignmentInOperand")
public CompletionStage unpackedGz() {
return new Concatenation(this.content)
.single()
.map(buf -> new Remaining(buf, true))
.map(Remaining::bytes)
.map(
bytes -> {
try (
GzipCompressorInputStream gcis = new GzipCompressorInputStream(
new BufferedInputStream(new ByteArrayInputStream(bytes))
)
) {
final ByteArrayOutputStream out = new ByteArrayOutputStream();
// @checkstyle MagicNumberCheck (1 line)
final byte[] buf = new byte[1024];
int cnt;
while (-1 != (cnt = gcis.read(buf))) {
out.write(buf, 0, cnt);
}
return out.toByteArray();
} catch (final IOException err) {
throw new UncheckedIOException(err);
}
}
).to(SingleInterop.get());
}
}