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Kotlin zip utils
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/* | |
* Copyright 2020 Michael Rittmeister | |
* | |
* 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 | |
* | |
* 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 com.github.devcordde.devcordbot.util | |
import java.io.FileInputStream | |
import java.nio.ByteBuffer | |
import java.nio.channels.FileChannel | |
import java.nio.file.Files | |
import java.nio.file.Path | |
import java.nio.file.StandardOpenOption | |
import java.util.zip.ZipEntry | |
import java.util.zip.ZipInputStream | |
fun unzipFile(path: Path, into: Path, strip: Int = 0, delete: Boolean = true) { | |
val stream = ZipInputStream(FileInputStream(path.toFile())) | |
val buffer = ByteArray(1024) | |
stream.use { | |
it.asIterable().forEach { entry -> | |
val destination = Path.of(entry.name) | |
val sanitizedDestination = if (destination.nameCount > strip) { | |
destination.subpath(strip, destination.nameCount) | |
} else destination | |
val finalDestination = into.resolve(sanitizedDestination) | |
if (finalDestination.parent?.let { parent -> !Files.exists(parent) } == true) { | |
Files.createDirectories(finalDestination.parent) | |
} | |
if (entry.isDirectory) { | |
if (sanitizedDestination.nameCount > strip) { | |
if (!Files.exists(finalDestination)) { | |
Files.createDirectories(finalDestination) | |
} | |
} | |
} else { | |
Files.createFile(finalDestination) | |
FileChannel.open(finalDestination, StandardOpenOption.WRITE).use { writer -> | |
while (it.read(buffer) > 0) { | |
writer.write(ByteBuffer.wrap(buffer)) | |
} | |
} | |
} | |
} | |
} | |
if (delete) { | |
Files.deleteIfExists(path) | |
} | |
} | |
private fun ZipInputStream.asIterable(): Iterable<ZipEntry> = object : Iterable<ZipEntry> { | |
override fun iterator(): Iterator<ZipEntry> = ZipIterator(this@asIterable) | |
} | |
private class ZipIterator(private val stream: ZipInputStream) : Iterator<ZipEntry> { | |
private var next: ZipEntry? = null | |
override fun hasNext(): Boolean { | |
next = stream.nextEntry | |
return next != null | |
} | |
override fun next(): ZipEntry = next ?: throw NoSuchElementException() | |
} |
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ZipIterator
class doesn't work correctly because the scope functionalso
innext
method move the pointer insideZipInputStream
.You should use this version: