Allow redirects to schemas with jar:file: URI

Author: roxspring

Diff for: src/main/java/com/github/fge/jsonschema/core/util/URIUtils.java

@@ -188,7 +188,7 @@ public void check(final URI argument)
             final JsonRef ref = JsonRef.fromURI(argument);
             BUNDLE.checkArgumentPrintf(ref.isAbsolute(),
                 "uriChecks.notAbsoluteRef", argument);
-            BUNDLE.checkArgumentPrintf(!argument.getPath().endsWith("/"),
+            BUNDLE.checkArgumentPrintf(argument.getPath() == null || !argument.getPath().endsWith("/"),
                 "uriChecks.endingSlash", argument);
         }
     };

Diff for: src/test/java/com/github/fge/jsonschema/core/util/URIUtilsTest.java

@@ -179,6 +179,31 @@ public void invalidPathURIsAreRejected(final String uri, final String key)
         }
     }
 
+    @DataProvider
+    public Iterator<Object[]> validSchemaURIs()
+    {
+        final List<Object[]> list = Lists.newArrayList();
+
+        String uri;
+
+        uri = "http://example.com/schema";
+        list.add(new Object[] { uri });
+
+        uri = "file:/path/to/schema.json";
+        list.add(new Object[] { uri });
+
+        uri = "jar:file:/path/to/container.jar!/internal/path/to/schema.json";
+        list.add(new Object[] { uri });
+
+        return list.iterator();
+    }
+
+    @Test(dataProvider = "validSchemaURIs")
+    public void validSchemaURIsAreAccepted(final String uri)
+    {
+        URIUtils.checkSchemaURI(URI.create(uri));
+    }
+
     @DataProvider
     public Iterator<Object[]> invalidSchemaURIs()
     {