Forbid pipe characters in URL references to ease parsing.

This is a temporary fix before we do full Wikitext parsing inside references
(this needs a change upstream). See https://github.com/sweble/sweble-wikitext/issues/67 .

main/src/com/google/refine/importers/WikitextImporter.java

@@ -156,7 +156,7 @@ public class WikitextImporter extends TabularImportingParserBase {
         private int spanningCellIdx;
         private List<String> internalLinksInCell;
         
-        private final Pattern urlPattern = Pattern.compile("\\b(https?|ftp)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]",
+        private final Pattern urlPattern = Pattern.compile("\\b(https?|ftp)://[-a-zA-Z0-9+&@#/%?=~_!:,.;]*[-a-zA-Z0-9+&@#/%=~_]",
                 Pattern.CASE_INSENSITIVE);
         
         public WikitextTableVisitor(boolean blankSpanningCells, boolean includeRawTemplates) {

main/tests/server/src/com/google/refine/tests/importers/WikitextImporterTests.java

@@ -224,6 +224,35 @@ public class WikitextImporterTests extends ImporterTest {
         Assert.assertEquals(project.rows.get(1).cells.get(4).value, "http://gnu.org");
         Assert.assertEquals(project.rows.get(1).cells.get(2).value, "http://microsoft.com/");
     }
+
+    @Test
+    public void readTableWithReferencesTemplates() {
+        // inspired from https://www.mediawiki.org/wiki/Help:Tables
+        String input = "{|\n"
+        +"! price\n"
+        +"! fruit\n"
+        +"! merchant\n"
+        +"|-\n"
+        +"| a || b <ref name=\"myref\">{{cite web|url=http://gnu.org|accessdate=2017-08-30}}</ref>  || c <ref name=\"ms\"> or {{cite journal|url=http://microsoft.com/|title=BLah}} </ref>\n"
+        +"|-\n"
+        +"| d || e <ref name=\"ms\"/>|| f <ref name=\"myref\" />\n"
+        +"|-\n"
+        +"|}\n";
+        
+        try {
+            prepareOptions(-1, true, true, null);
+            parse(input);
+        } catch (Exception e) {
+                Assert.fail("Parsing failed", e);
+        }
+        Assert.assertEquals(project.columnModel.columns.size(), 5);
+        Assert.assertEquals(project.rows.get(0).cells.get(1).value, "b");
+        Assert.assertEquals(project.rows.get(0).cells.get(2).value, "http://gnu.org");
+        Assert.assertEquals(project.rows.get(0).cells.get(4).value, "http://microsoft.com/");
+        Assert.assertEquals(project.rows.get(1).cells.get(4).value, "http://gnu.org");
+        Assert.assertEquals(project.rows.get(1).cells.get(2).value, "http://microsoft.com/");
+    }
+
     //--helpers--
     
     private void parse(String wikitext) {