Hey, I'm running SPARQL queries on endpoints with HTTP Basic authentication, and am looking for a convenient way to manage and configure the credentials.
Currently I've implemented a simple registry that checks endpoint URIs against a map and sets the credentials using QueryEngineHTTP.setBasicAuthentication(). Recently however I came across query Context configuration: http://jena.apache.org/documentation/query/service.html That seemed exactly what I needed, but there is a problem: it doesn't seem to work with basic QueryEngineHTTP? Am I right to assume that srv:serviceContext only works with explicit SERVICE endpoints? Any reason why the approaches cannot be unified and QueryEngineHTTP.setBasicAuthentication() would use the Context? It is executing the query against some service after all (even if it's not explicit SERVICE). What class(es) would I need to extend to achieve this? The code I tried on ARQ 2.9.2 (endpoint and credentials are bogus): Context sparqlContext = new Context(); sparqlContext.put(ARQConstants.allocSymbol("http://jena.hpl.hp.com/Service#";, "queryAuthUser"), "xxxxx"); sparqlContext.put(ARQConstants.allocSymbol("http://jena.hpl.hp.com/Service#";, "queryAuthPwd"), "yyyy"); Map<String,Context> serviceContext = new HashMap<String,Context>(); serviceContext.put("http://dydra.com/graphity/repository/sparql";, sparqlContext); ARQ.getContext().put(ARQConstants.allocSymbol("http://jena.hpl.hp.com/Service#";, "serviceContext"), serviceContext); ... QueryEngineHTTP request = QueryExecutionFactory.createServiceRequest(endpointURI, query); if (log.isDebugEnabled()) log.debug("SPARQL Context: {} ", request.getContext()); request.execConstruct(); I see the credentials in the debug output: symbol:http://jena.hpl.hp.com/Service#serviceContext = {http://dydra.com/graphity/repository/sparql=symbol:http://jena.hpl.hp.com/Service#queryAuthPwd = yyyy symbol:http://jena.hpl.hp.com/Service#queryAuthUser = xxxxx} but the serviceContext doesn't seem to have effect since I'm getting 13:21:54,149 TRACE HttpQuery:242 - Exception in exec HttpException: 401 Unauthorized You need to sign in or sign up before continuing. at com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:431) where QueryEngineHTTP.setBasicAuthentication() used to work fine. Am I doing it wrong? Help appreciated :) Martynas graphity.org
