Invalid 'expires' attribute with SERVICE Wikidata

mospring · November 20, 2020, 12:36pm

I am having the same problem as already described here:

while running a Wikidata Service query with Stardog that includes a property path.
It seems to be a Httpclient issue and is fixable as described here:

github.com/eclipse/rdf4j

Invalid cookie header warning in log when using SPARQLRepository against Wikidata query service

opened 06:16AM - 08 Dec 19 UTC

closed 09:09AM - 09 Dec 19 UTC

aschwarte10

🐞 bug

When using the SPARQLRepository to evaluate a query against the Wikidata query s…ervice, the log is filled with warnings of the following type: ``` [main] WARN org.apache.http.client.protocol.ResponseProcessCookies - Invalid cookie header: "Set-Cookie: WMF-Last-Access-Global=08-Dec-2019;Path=/;Domain=.wikidata.org;HttpOnly;secure;Expires=Thu, 09 Jan 2020 00:00:00 GMT". Invalid 'expires' attribute: Thu, 09 Jan 2020 00:00:00 GMT ``` An investigation has shown that this is due to the current (default) HTTP Client implementation which does not correctly parse the cookies. Further investigation has shown that users of the HTTP client are are advised to to explicitly use RFC 6265 compliant policies. This can be achieved using configuration. See https://issues.apache.org/jira/browse/HTTPCLIENT-1763 and https://stackoverflow.com/questions/36473478/fixing-httpclient-warning-invalid-expires-attribute-using-fluent-api/40697322 for further details The log can be seen by running a test like the following (with logs enabled): ``` @Test public void testWikidata() throws Exception { SPARQLRepository repo = new SPARQLRepository("https://query.wikidata.org/sparql"); repo.init(); try (RepositoryConnection conn = repo.getConnection()) { TupleQuery tq = conn.prepareTupleQuery("SELECT * WHERE { ?s ?p ?o } LIMIT 10"); try (TupleQueryResult tqr = tq.evaluate()) { while (tqr.hasNext()) { System.out.println(tqr.next()); } } } repo.shutDown(); } ```

It would be great to fix this bug in Stardog as well. I don't know how to run my query now.

system · December 4, 2020, 12:36pm

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