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From "Archie Cobbs (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1738) CLONE - "deflate" encoding issue : java.util.zip.ZipException: invalid block type
Date Wed, 20 Apr 2016 21:36:25 GMT
Archie Cobbs created HTTPCLIENT-1738:
----------------------------------------

             Summary: CLONE - "deflate" encoding issue : java.util.zip.ZipException: invalid
block type
                 Key: HTTPCLIENT-1738
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1738
             Project: HttpComponents HttpClient
          Issue Type: Bug
         Environment: Windows
            Reporter: Archie Cobbs
            Priority: Minor
             Fix For: 4.5.2


When trying to GET any nzb files from http://nzbindex.nl with a httpclient request, a ZipException
is raised.

{code:title=JunitTestFailing.java}
	@Test
	public void testDeflateIssueFailing() throws ClientProtocolException, IOException {
		HttpGet httpget = new HttpGet("http://nzbindex.nl/download/72441827/BackTrack5R3.Gnome.iSO.32bit-LiNUX-0171-bt5r2gis32.par2.nzb");
		HttpClient client = HttpClientBuilder.create().build();
		HttpResponse response = client.execute(httpget);
		HttpEntity entity = response.getEntity();
		byte[] data = EntityUtils.toByteArray( entity );
		Assert.assertEquals( data.length, 423548 );
	}

{code}

The complete stack trace I get is this:

{code}
java.util.zip.ZipException: invalid stored block lengths
	at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:164)
	at java.io.FilterInputStream.read(FilterInputStream.java:107)
	at org.apache.http.client.entity.DeflateInputStream.read(DeflateInputStream.java:144)
	at org.apache.http.client.entity.LazyDecompressingInputStream.read(LazyDecompressingInputStream.java:68)
	at org.apache.http.util.EntityUtils.toByteArray(EntityUtils.java:136)
	at hclient.HTTPClientTest.testDeflateIssueFailing(HTTPClientTest.java:39)
{code}

A workaround I found is to set the Accept-Encoding header to only accept gzip, as follows:

{code:title=JunitTestWorking.java}
	
	@Test
	public void testDeflateIssueWorking() throws ClientProtocolException, IOException {
		HttpGet httpget = new HttpGet("http://nzbindex.nl/download/72441827/BackTrack5R3.Gnome.iSO.32bit-LiNUX-0171-bt5r2gis32.par2.nzb");
		httpget.setHeader("Accept-Encoding", "gzip");
		HttpClient client = HttpClientBuilder.create().build();
		HttpResponse response = client.execute(httpget);
		HttpEntity entity = response.getEntity();
		byte[] data = EntityUtils.toByteArray( entity );
		Assert.assertEquals( data.length, 423548 );
	}
{code}

Thanks



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