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Posted to dev@jena.apache.org by "Hugh Williams (JIRA)" <ji...@apache.org> on 2016/01/14 11:37:39 UTC
[jira] [Created] (JENA-1116) Does Jena 2.7.x support compressed
chunked results from SPARQL endpoints
Hugh Williams created JENA-1116:
-----------------------------------
Summary: Does Jena 2.7.x support compressed chunked results from SPARQL endpoints
Key: JENA-1116
URL: https://issues.apache.org/jira/browse/JENA-1116
Project: Apache Jena
Issue Type: Bug
Components: Jena
Affects Versions: Jena 2.7.4
Environment: Any ...
Reporter: Hugh Williams
Consider the following sample code:
$ cat VirtuosoTestMalformedInput.java
import com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP;
/**
* Created by kosterar on 2015-11-25.
*/
public class VirtuosoTestMalformedInput {
public static final String SPARQL_ENDPOINT =
"http://demo.openlinksw.com/sparql";
public static final String QUERY = "SELECT ?p where { <${s}> ?p ?o.}";
public static void main(String... args) {
test();
}
public static void test() {
final QueryEngineHTTP queryEngine = new
QueryEngineHTTP(SPARQL_ENDPOINT, QUERY);
queryEngine.execSelect();
}
}
$
Which queries a Virtuoso SPARQL endpoint with a deliberate bad query. The Virtuoso SPARQL endpoint sends result in compressed (gzipped) chunks by default (EnabledGzipContent = 1 set in the HTTP Server section of the Virtuoso config file by default).
When the about query is run one expects the error "SP030 SPARQL compiler, line 0: Bad character '$' (0x24)
in SPARQL expression at '$'" to be returned:
$ curl -g -H 'Accept:
application/json'
'http://demo.openinksw.com/sparql?query=SELECT%20%3Fp%20where%20%7B%20%3C%24%7Bs%7D%3E%20%3Fp%20%3Fo.%7D'
Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '$' (0x24)
in SPARQL expression at '$'
SPARQL query:
define sql:big-data-const 0 SELECT ?p where { <${s}> ?p ?o.}
$
but instead Jena gives the error:
$ javac -classpath
".:../apache-jena-2.7.4/lib/commons-codec-1.5.jar:../apache-jena-2.7.4/lib/httpclient-4.1.2.jar:../apache-jena-2.7.4/lib/httpcore-4.1.3.jar:../apache-jena-2.7.4/lib/jcl-over-slf4j-1.6.4.jar:../apache-jena-2.7.4/lib/jena-arq-2.9.4.jar:../apache-jena-2.7.4/lib/jena-core-2.7.4.jar:../apache-jena-2.7.4/lib/jena-iri-0.9.4.jar:../apache-jena-2.7.4/lib/jena-tdb-0.9.4.jar:../apache-jena-2.7.4/lib/log4j-1.2.16.jar:../apache-jena-2.7.4/lib/slf4j-api-1.6.4.jar:../apache-jena-2.7.4/lib/slf4j-log4j12-1.6.4.jar:../apache-jena-2.7.4/lib/xercesImpl-2.10.0.jar:../apache-jena-2.7.4/lib/xml-apis-1.4.01.jar"
VirtuosoTestMalformedInput.java
$ java -classpath
".:../apache-jena-2.7.4/lib/commons-codec-1.5.jar:../apache-jena-2.7.4/lib/httpclient-4.1.2.jar:../apache-jena-2.7.4/lib/httpcore-4.1.3.jar:../apache-jena-2.7.4/lib/jcl-over-slf4j-1.6.4.jar:../apache-jena-2.7.4/lib/jena-arq-2.9.4.jar:../apache-jena-2.7.4/lib/jena-core-2.7.4.jar:../apache-jena-2.7.4/lib/jena-iri-0.9.4.jar:../apache-jena-2.7.4/lib/jena-tdb-0.9.4.jar:../apache-jena-2.7.4/lib/log4j-1.2.16.jar:../apache-jena-2.7.4/lib/slf4j-api-1.6.4.jar:../apache-jena-2.7.4/lib/slf4j-log4j12-1.6.4.jar:../apache-jena-2.7.4/lib/xercesImpl-2.10.0.jar:../apache-jena-2.7.4/lib/xml-apis-1.4.01.jar"
VirtuosoTestMalformedInput
log4j:WARN No appenders could be found for logger
(com.hp.hpl.jena.sparql.mgt.ARQMgt).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" HttpException:
java.nio.charset.MalformedInputException: Input length = 1:
java.nio.charset.MalformedInputException: Input length = 1
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:520)
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:289)
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:240)
at
com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:213)
at VirtuosoTestMalformedInput.test(VirtuosoTestMalformedInput.java:21)
at VirtuosoTestMalformedInput.main(VirtuosoTestMalformedInput.java:15)
Caused by: java.nio.charset.MalformedInputException: Input length = 1
at java.nio.charset.CoderResult.throwException(CoderResult.java:281)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.read1(BufferedReader.java:210)
at java.io.BufferedReader.read(BufferedReader.java:286)
at java.io.Reader.read(Reader.java:140)
at
com.hp.hpl.jena.util.FileUtils.readWholeFileAsUTF8(FileUtils.java:460)
at
com.hp.hpl.jena.util.FileUtils.readWholeFileAsUTF8(FileUtils.java:444)
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:433)
... 5 more
$
Whereas if I set EnabledGzipContent = 0 set in Virtuoso INI file the expected error is returned:
$ java -classpath
".:../apache-jena-2.7.4/lib/commons-codec-1.5.jar:../apache-jena-2.7.4/lib/httpclient-4.1.2.jar:../apache-jena-2.7.4/lib/httpcore-4.1.3.jar:../apache-jena-2.7.4/lib/jcl-over-slf4j-1.6.4.jar:../apache-jena-2.7.4/lib/jena-arq-2.9.4.jar:../apache-jena-2.7.4/lib/jena-core-2.7.4.jar:../apache-jena-2.7.4/lib/jena-iri-0.9.4.jar:../apache-jena-2.7.4/lib/jena-tdb-0.9.4.jar:../apache-jena-2.7.4/lib/log4j-1.2.16.jar:../apache-jena-2.7.4/lib/slf4j-api-1.6.4.jar:../apache-jena-2.7.4/lib/slf4j-log4j12-1.6.4.jar:../apache-jena-2.7.4/lib/xercesImpl-2.10.0.jar:../apache-jena-2.7.4/lib/xml-apis-1.4.01.jar"
VirtuosoTestMalformedInput
log4j:WARN No appenders could be found for logger
(com.hp.hpl.jena.sparql.mgt.ARQMgt).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" HttpException: 400 Bad Request
Virtuoso 37000 Error SP030: SPARQL compiler, line 0: Bad character '$' (0x24)
in SPARQL expression at '$'
SPARQL query:
SELECT ?p where { <${s}> ?p ?o.}
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:434)
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:289)
at
com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:240)
at
com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:213)
at VirtuosoTestMalformedInput.test(VirtuosoTestMalformedInput.java:21)
at VirtuosoTestMalformedInput.main(VirtuosoTestMalformedInput.java:15)
$
Hence the question as to whether Jena 2.7x supports compress chunked data or is this possibly a bug ?
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