Zlib Inflate/Decompress in Kotlin

zlibDecompress.kt

/**
 * Zlib decompress a file and return its contents
 *
 * @param filePath absolute path to file
 * @return unzipped file contents
 */
fun decompress(filePath: String) : String {
    val content = File(filePath).readBytes()
    val inflater = Inflater()
    val outputStream = ByteArrayOutputStream()
    val buffer = ByteArray(1024)

    inflater.setInput(content)

    while (!inflater.finished()) {
        val count = inflater.inflate(buffer)
        outputStream.write(buffer, 0, count)
    }

    outputStream.close()

    return outputStream.toString(UTF_8)
}