[HTTPCLIENT-1550] "deflate" encoding issue : java.util.zip.ZipException: invalid stored block lengths

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.3.5
• Fix Version/s: 4.5.2
• Environment: Windows
• Assignee: Unassigned
• Reporter: Guillaume Serre
• Created: 30/Aug/14 21:51
• Updated: 18/Jul/17 02:09
• Resolved: 30/Nov/15 20:38

Description

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

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 );
	}

The complete stack trace I get is this:

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)

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

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 );
	}

Thanks

Issue Links

• is cloned by: HTTPCLIENT-1738 CLONE - "deflate" encoding issue : java.util.zip.ZipException: invalid block type
• is duplicated by: HTTPCLIENT-1699 Content of response with content-encoding: deflate cannot be read