java - 使用 Jena ARQ 通过基本身份验证访问远程存储库 - 抢占式

Question

我正在尝试将 Jena ARQ 与 PreemptiveBasicAuthenticator 一起使用，但没有成功，有人可以帮忙吗？

我总是收到 401，尽管通过 REST 客户端或使用 openrdf 的相同请求是有效的。是否与 apache http 客户端有关并且必须设置 AuthScope？

import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.ResultSet;
import org.apache.jena.atlas.web.auth.HttpAuthenticator;
import org.apache.jena.atlas.web.auth.PreemptiveBasicAuthenticator;
import org.apache.jena.atlas.web.auth.ScopedAuthenticator;

import java.net.URI;

public class JenaConnect {

    private final static String SPARQLR_ENDPOINT = "https://repo-eh-01.sparqlr.com/repositories/examples-repo";
    private final static String SPARQLR_USERNAME = "examples-repo";
    private final static String SPARQLR_PASSWORD = "XXXX";

    public static void main(String[] args) throws Exception {

        String queryString = "SELECT * WHERE {?s ?p ?o}";
        Query query = QueryFactory.create(queryString);
        HttpAuthenticator authenticator = new PreemptiveBasicAuthenticator(
                new ScopedAuthenticator(new URI(SPARQLR_ENDPOINT), SPARQLR_USERNAME, SPARQLR_PASSWORD.toCharArray())
        );
        QueryExecution queryExecution = QueryExecutionFactory.sparqlService(SPARQLR_ENDPOINT, query, authenticator);
        try {
            ResultSet results = queryExecution.execSelect();
            int i = 0;
            while(results.hasNext()) {
                results.next();
                i++;
            }
            System.out.println(i);
        } finally {
            queryExecution.close();
        }
    }
}

Answer 1

在此线程中提问和回答:http://mail-archives.apache.org/mod_mbox/jena-users/201401.mbox/%3CF6F103F1-7205-4E6B-94EB-FEB67129A39A%40sparqlr.com%3E