658b46e1cc
* Move (de)compression helpers to akka-stream #21395 * Move compression and decompression -related classes from akka-http-experimental to akka-stream * Add Compression helper object with functions to create decompressing Flows * Add a short cookbook entry * =str move compression impl classes into their own directory (and change visibility) * =str also expose gzip/deflate compression flows * Fix formatting of plural ByteStrings in cookbook * =str #21395 make compressor call Deflater.end in postStop to release resources Also simplified the creation of the flow given a compressor. * =str #21395 decompressors call Inflater.end in postStop to release resources * =str #21395 smallish Scaladoc fixes
40 lines
1.1 KiB
Scala
40 lines
1.1 KiB
Scala
/**
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* Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com/>
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*/
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package docs.stream.cookbook
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import java.io.ByteArrayOutputStream
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import java.nio.charset.StandardCharsets
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import java.util.zip.GZIPOutputStream
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import akka.stream.impl.io.compression.GzipCompressor
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import akka.stream.scaladsl.Sink
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import akka.stream.scaladsl.Source
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import akka.util.ByteString
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import scala.annotation.tailrec
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import scala.concurrent.Await
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import scala.concurrent.duration._
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class RecipeDecompress extends RecipeSpec {
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def gzip(s: String): ByteString = {
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val buf = new ByteArrayOutputStream()
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val out = new GZIPOutputStream(buf)
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try out.write(s.getBytes(StandardCharsets.UTF_8)) finally out.close()
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ByteString(buf.toByteArray)
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}
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"Recipe for decompressing a Gzip stream" must {
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"work" in {
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val compressed = Source.single(gzip("Hello World"))
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//#decompress-gzip
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import akka.stream.scaladsl.Compression
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val uncompressed = compressed.via(Compression.gunzip())
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.map(_.utf8String)
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//#decompress-gzip
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Await.result(uncompressed.runWith(Sink.head), 3.seconds) should be("Hello World")
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}
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}
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}
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