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jena-fuseki-access - Dynamic Graph selection at query time
- "#pragma acl.graphs" preamble can be used to specify one or more graphs to restriction query exectution to - The functionality is only enabled if an access:entry for a specific user contains just <urn:jena:accessGraphsDynamic> - Only applies to SPARQL query, not GSP (since the latter can already be filtered dynamically) - Requires context propagation patch (see apache#1291), since query is stored in request-specific context
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72 changes: 72 additions & 0 deletions
72
...ena-fuseki-access/src/main/java/org/apache/jena/fuseki/access/SecurityContextDynamic.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.jena.fuseki.access; | ||
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| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| import org.apache.jena.graph.Node; | ||
| import org.apache.jena.graph.NodeFactory; | ||
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| /** A {@link SecurityContext} that provides no access itself but indicates that the set of visible graphs should be | ||
| * constructed from a set embedded in the query. Use {@link SecurityContextDynamic#instantiateFromQuery} to create the | ||
| * query-specific set of graphs to filter. | ||
| * This context is not meant to be used directly by end users: The initial query has a list of visible graphs prepended | ||
| * before execution based on use-case specific criteria, with the following format: | ||
| * | ||
| * #pragma acl.graphs <graph1>|<graph2>|..|<graphN> | ||
| * | ||
| */ | ||
| public class SecurityContextDynamic extends SecurityContextAllowNone { | ||
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| public static final Node dynamicAccess = NodeFactory.createURI("urn:jena:accessGraphsDynamic"); | ||
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| public static final String GRAPH_PRAGMA_DELIMITER = "|"; | ||
| private static final Pattern GRAPH_PRAGMA_DELIMITER_PATTERN = Pattern.compile("\\" + GRAPH_PRAGMA_DELIMITER); | ||
| private static final String GRAPH_PRAGMA_PATTERN_GROUP = "graphs"; | ||
| private static final Pattern GRAPH_PRAGMA_PATTERN = Pattern.compile( | ||
| "^" + | ||
| // Leading whitespace | ||
| "\\s*" + | ||
| // For simplicity, expect pragma on first non-whitespace line | ||
| "#pragma acl\\.graphs\\h+(?<" + GRAPH_PRAGMA_PATTERN_GROUP + ">\\S*)\\h*\\v" + | ||
| // Anything else | ||
| ".*", | ||
| Pattern.DOTALL | ||
| ); | ||
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| public static SecurityContext forQuery(String queryString) { | ||
| if ( queryString != null ) { | ||
| Matcher m = GRAPH_PRAGMA_PATTERN.matcher(queryString); | ||
| if ( m.matches() ) { | ||
| String[] graphs = GRAPH_PRAGMA_DELIMITER_PATTERN | ||
| .splitAsStream(m.group(GRAPH_PRAGMA_PATTERN_GROUP)) | ||
| .map(String::trim) | ||
| .toArray(String[]::new); | ||
| if ( graphs.length > 0 ) { | ||
| return new SecurityContextView(graphs); | ||
| } | ||
| } | ||
| } | ||
| /* Note: SecurityContext.ALL is not supported since according to AssemblerSecurityRegistry support for | ||
| * urn:jena:accessAllGraphs (*) and urn:jena:accessAllNamedGraphs (**) is unfinished. | ||
| */ | ||
| return SecurityContext.NONE; | ||
| } | ||
| } |
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83 changes: 83 additions & 0 deletions
83
...fuseki-access/src/test/java/org/apache/jena/fuseki/access/TestSecurityContextDynamic.java
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| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.jena.fuseki.access; | ||
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| import java.util.Arrays; | ||
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| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertTrue; | ||
| import static org.junit.Assert.assertFalse; | ||
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| // Note: JUnit 4 does not support parameterized tests | ||
| import junitparams.JUnitParamsRunner; | ||
| import junitparams.Parameters; | ||
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| import org.junit.Test; | ||
| import org.junit.runner.RunWith; | ||
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| /** Test parsing of assemblers with security aspects */ | ||
| @RunWith(JUnitParamsRunner.class) | ||
| public class TestSecurityContextDynamic { | ||
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| private static final String ACL_PRAGMA = "#pragma acl.graphs"; | ||
| private static final String ONE_GRAPH_PRAGMA = ACL_PRAGMA + " some:graph"; | ||
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| @Test | ||
| @Parameters({ | ||
| // empty | ||
| "", | ||
| // other comments before pragma | ||
| "# Comment\n" + ONE_GRAPH_PRAGMA, | ||
| // pragma after grammar start | ||
| "PREFIX ex: http://example.org/\n" + ONE_GRAPH_PRAGMA, | ||
| // without space delimiter | ||
| ACL_PRAGMA + "some:graph", | ||
| // with empty graph list | ||
| ACL_PRAGMA + " ", | ||
| }) | ||
| public void forQuery_returns_allow_none_context_when_pragma_not_matched(String preamble) { | ||
| final String query = "\nSELECT 1 {}"; | ||
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| SecurityContext sCxt = SecurityContextDynamic.forQuery(preamble + query); | ||
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| assertEquals(SecurityContext.NONE, sCxt); | ||
| } | ||
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| @Test | ||
| @Parameters(method="graphValues") | ||
| public void forQuery_returns_expected_context_when_pragma_matched(String[] graphs) { | ||
| final String query = "\nSELECT 1 {}"; | ||
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| String graphString = String.join(SecurityContextDynamic.GRAPH_PRAGMA_DELIMITER, graphs); | ||
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| SecurityContext sCxt = SecurityContextDynamic.forQuery(ACL_PRAGMA + " " + graphString + query); | ||
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| assertFalse(sCxt.visableDefaultGraph()); | ||
| assertEquals(graphs.length, sCxt.visibleGraphs().size()); | ||
| assertTrue(sCxt.visibleGraphNames().containsAll(Arrays.asList(graphs))); | ||
| } | ||
| private Object[] graphValues() { | ||
| return new Object[]{ | ||
| new Object[]{new String[]{"graph:one"}}, | ||
| new Object[]{new String[]{"graph:one", "graph:two"}}, | ||
| new Object[]{new String[]{"graph:one", "graph:two", "graph:three"}}, | ||
| }; | ||
| } | ||
|
|
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| } |
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