Abdera fails to completely read streams using GZIP compression
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Key: ABDERA-249
URL: https://issues.apache.org/jira/browse/ABDERA-249
Project: Abdera
Issue Type: Bug
Affects Versions: 1.0
Environment: Mac OS X, Java 1.6
Reporter: James Falkner
Test code:
{code:java}
Abdera abdera = new Abdera();
AbderaClient client = new AbderaClient(abdera);
ClientResponse resp =
client.get("http://www.facebook.com/activitystreams/feed.php?source_id=499225640";);
Document<Feed> doc = resp.getDocument();
doc.complete();
{code}
When reading a stream that is gzip-compressed (such as the sample facebook
stream above), Abdera throws an exception:
{code}
Exception in thread "main" org.apache.abdera.parser.ParseException:
java.lang.RuntimeException: [was class java.io.EOFException] Unexpected end of
ZLIB input stream
at org.apache.abdera.parser.stax.FOMBuilder.next(FOMBuilder.java:260)
at org.apache.axiom.om.impl.llom.OMNodeImpl.build(OMNodeImpl.java:318)
at
org.apache.axiom.om.impl.llom.OMElementImpl.build(OMElementImpl.java:614)
at
org.apache.abdera.parser.stax.FOMElement.complete(FOMElement.java:845)
at org.apache.abdera.parser.stax.FOMFeed.sortEntries(FOMFeed.java:167)
at FacebookStreamReader.main(FacebookStreamReader.java:42)
Caused by: java.lang.RuntimeException: [was class java.io.EOFException]
Unexpected end of ZLIB input stream
at
com.ctc.wstx.util.ExceptionUtil.throwRuntimeException(ExceptionUtil.java:18)
at com.ctc.wstx.sr.StreamScanner.throwLazyError(StreamScanner.java:706)
at
com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3655)
at com.ctc.wstx.sr.BasicStreamReader.getText(BasicStreamReader.java:809)
at
org.apache.axiom.om.impl.builder.StAXBuilder.createOMText(StAXBuilder.java:245)
at
org.apache.axiom.om.impl.builder.StAXBuilder.createOMText(StAXBuilder.java:216)
at
org.apache.abdera.parser.stax.FOMBuilder.applyTextFilter(FOMBuilder.java:158)
at org.apache.abdera.parser.stax.FOMBuilder.next(FOMBuilder.java:206)
... 5 more
Caused by: java.io.EOFException: Unexpected end of ZLIB input stream
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:223)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:141)
at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:92)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at
org.apache.abdera.protocol.client.util.AutoReleasingInputStream.read(AutoReleasingInputStream.java:56)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at com.ctc.wstx.io.MergedReader.read(MergedReader.java:101)
at com.ctc.wstx.io.ReaderSource.readInto(ReaderSource.java:84)
at
com.ctc.wstx.io.BranchingReaderSource.readInto(BranchingReaderSource.java:57)
at com.ctc.wstx.sr.StreamScanner.loadMore(StreamScanner.java:967)
at
com.ctc.wstx.sr.BasicStreamReader.readTextSecondary(BasicStreamReader.java:4626)
at
com.ctc.wstx.sr.BasicStreamReader.readCoalescedText(BasicStreamReader.java:4124)
at
com.ctc.wstx.sr.BasicStreamReader.finishToken(BasicStreamReader.java:3699)
at
com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3647)
... 10 more
{code}
If I force the stream to be un-compressed, via this code, it works:
{code:java}
Abdera abdera = new Abdera();
AbderaClient client = new AbderaClient(abdera);
RequestOptions options = client.getDefaultRequestOptions();
options.setAcceptEncoding((String)null);
ClientResponse resp =
client.get("http://www.facebook.com/activitystreams/feed.php?source_id=499225640";,
options);
Document<Feed> doc = resp.getDocument();
doc.complete();
{code}
There is some code in
org.apache.abdera.protocol.client.util.AutoReleasingInputStream that is not
properly handling the EOFException. If I modify that code to also catch the
EOFException and behave as though it had gotten back a -1 from the read()
method, then it also starts working.
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