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W3CDomTest.java
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W3CDomTest.java
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package org.jsoup.helper;
import org.jsoup.Jsoup;
import org.jsoup.TextUtil;
import org.jsoup.integration.ParseTest;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.TextNode;
import org.junit.jupiter.api.Test;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.*;
public class W3CDomTest {
private static Document parseXml(String xml, boolean nameSpaceAware) {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(nameSpaceAware);
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setEntityResolver((publicId, systemId) -> {
if (systemId.contains("about:legacy-compat")) { // <!doctype html>
return new InputSource(new StringReader(""));
} else {
return null;
}
});
Document dom = builder.parse(new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8)));
dom.normalizeDocument();
return dom;
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
@Test
public void simpleConversion() {
String html = "<html><head><title>W3c</title></head><body><p class='one' id=12>Text</p><!-- comment --><invalid>What<script>alert('!')";
org.jsoup.nodes.Document doc = Jsoup.parse(html);
W3CDom w3c = new W3CDom();
Document wDoc = w3c.fromJsoup(doc);
NodeList meta = wDoc.getElementsByTagName("META");
assertEquals(0, meta.getLength());
String out = W3CDom.asString(wDoc, W3CDom.OutputXml());
String expected = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><html><head><title>W3c</title></head><body><p class=\"one\" id=\"12\">Text</p><!-- comment --><invalid>What<script>alert('!')</script></invalid></body></html>";
assertEquals(expected, TextUtil.stripNewlines(out));
Document roundTrip = parseXml(out, true);
assertEquals("Text", roundTrip.getElementsByTagName("p").item(0).getTextContent());
// check we can set properties
Map<String, String> properties = W3CDom.OutputXml();
properties.put(OutputKeys.INDENT, "yes");
String furtherOut = W3CDom.asString(wDoc, properties);
assertTrue(furtherOut.length() > out.length()); // wanted to assert formatting, but actual indentation is platform specific so breaks in CI
String furtherExpected =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?><html><head><title>W3c</title></head><body><p class=\"one\" id=\"12\">Text</p><!-- comment --><invalid>What<script>alert('!')</script></invalid></body></html>";
assertEquals(furtherExpected, TextUtil.stripNewlines(furtherOut)); // on windows, DOM will write newlines as \r\n
}
@Test
public void convertsGoogle() throws IOException {
File in = ParseTest.getFile("/htmltests/google-ipod.html.gz");
org.jsoup.nodes.Document doc = Jsoup.parse(in, "UTF8");
W3CDom w3c = new W3CDom();
Document wDoc = w3c.fromJsoup(doc);
Node htmlEl = wDoc.getChildNodes().item(1);
assertNull(htmlEl.getNamespaceURI());
assertEquals("html", htmlEl.getLocalName());
assertEquals("html", htmlEl.getNodeName());
DocumentType doctype = wDoc.getDoctype();
Node doctypeNode = wDoc.getChildNodes().item(0);
assertSame(doctype, doctypeNode);
assertEquals("html", doctype.getName());
String xml = W3CDom.asString(wDoc, W3CDom.OutputXml());
assertTrue(xml.contains("ipod"));
Document roundTrip = parseXml(xml, true);
assertEquals("Images", roundTrip.getElementsByTagName("a").item(0).getTextContent());
}
@Test
public void convertsGoogleLocation() throws IOException {
File in = ParseTest.getFile("/htmltests/google-ipod.html.gz");
org.jsoup.nodes.Document doc = Jsoup.parse(in, "UTF8");
W3CDom w3c = new W3CDom();
Document wDoc = w3c.fromJsoup(doc);
String out = w3c.asString(wDoc);
assertEquals(doc.location(), wDoc.getDocumentURI());
}
@Test
public void namespacePreservation() throws IOException {
File in = ParseTest.getFile("/htmltests/namespaces.xhtml");
org.jsoup.nodes.Document jsoupDoc;
jsoupDoc = Jsoup.parse(in, "UTF-8");
Document doc;
org.jsoup.helper.W3CDom jDom = new org.jsoup.helper.W3CDom();
doc = jDom.fromJsoup(jsoupDoc);
Node htmlEl = doc.getChildNodes().item(0);
assertEquals("http://www.w3.org/1999/xhtml", htmlEl.getNamespaceURI());
assertEquals("html", htmlEl.getLocalName());
assertEquals("html", htmlEl.getNodeName());
// inherits default namespace
Node head = htmlEl.getFirstChild().getNextSibling();
assertEquals("http://www.w3.org/1999/xhtml", head.getNamespaceURI());
assertEquals("head", head.getLocalName());
assertEquals("head", head.getNodeName());
Node epubTitle = htmlEl.getChildNodes().item(3).getChildNodes().item(3);
assertEquals("Check", epubTitle.getTextContent());
assertEquals("http://www.idpf.org/2007/ops", epubTitle.getNamespaceURI());
assertEquals("title", epubTitle.getLocalName());
assertEquals("epub:title", epubTitle.getNodeName());
Node xSection = epubTitle.getNextSibling().getNextSibling();
assertEquals("urn:test", xSection.getNamespaceURI());
assertEquals("section", xSection.getLocalName());
assertEquals("x:section", xSection.getNodeName());
// https://github.com/jhy/jsoup/issues/977
// does not keep last set namespace
Node svg = xSection.getNextSibling().getNextSibling();
assertEquals("http://www.w3.org/2000/svg", svg.getNamespaceURI());
assertEquals("svg", svg.getLocalName());
assertEquals("svg", svg.getNodeName());
Node path = svg.getChildNodes().item(1);
assertEquals("http://www.w3.org/2000/svg", path.getNamespaceURI());
assertEquals("path", path.getLocalName());
assertEquals("path", path.getNodeName());
Node clip = path.getChildNodes().item(1);
assertEquals("http://example.com/clip", clip.getNamespaceURI());
assertEquals("clip", clip.getLocalName());
assertEquals("clip", clip.getNodeName());
assertEquals("456", clip.getTextContent());
Node picture = svg.getNextSibling().getNextSibling();
assertEquals("http://www.w3.org/1999/xhtml", picture.getNamespaceURI());
assertEquals("picture", picture.getLocalName());
assertEquals("picture", picture.getNodeName());
Node img = picture.getFirstChild();
assertEquals("http://www.w3.org/1999/xhtml", img.getNamespaceURI());
assertEquals("img", img.getLocalName());
assertEquals("img", img.getNodeName());
}
@Test
public void handlesInvalidAttributeNames() {
String html = "<html><head></head><body style=\"color: red\" \" name\"></body></html>";
org.jsoup.nodes.Document jsoupDoc;
jsoupDoc = Jsoup.parse(html);
Element body = jsoupDoc.select("body").first();
assertTrue(body.hasAttr("\"")); // actually an attribute with key '"'. Correct per HTML5 spec, but w3c xml dom doesn't dig it
assertTrue(body.hasAttr("name\""));
Document w3Doc = W3CDom.convert(jsoupDoc);
String xml = W3CDom.asString(w3Doc, W3CDom.OutputXml());
assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?><html><head/><body name=\"\" style=\"color: red\"/></html>", xml);
}
@Test
public void handlesAccentedCharsAttributeNames() {
String html = "<!DOCTYPE html><html><head></head><body style=\"color: red\" \" name\"><p hành=\"1\" hình=\"2\">unicode attr names</p></body></html>";
org.jsoup.nodes.Document jsoupDoc;
jsoupDoc = Jsoup.parse(html);
Element body = jsoupDoc.select("body").first();
assertTrue(body.hasAttr("\"")); // actually an attribute with key '"'. Correct per HTML5 spec, but w3c xml dom doesn't dig it
assertTrue(body.hasAttr("name\""));
Document w3Doc = W3CDom.convert(jsoupDoc);
String out = W3CDom.asString(w3Doc, W3CDom.OutputHtml());
assertEquals("<!DOCTYPE html SYSTEM \"about:legacy-compat\">\n<html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body name=\"\" style=\"color: red\"><p hành=\"1\" hình=\"2\">unicode attr names</p></body></html>", out);
}
@Test
public void handlesInvalidTagAsText() {
org.jsoup.nodes.Document jsoup = Jsoup.parse("<インセンティブで高収入！>Text <p>More</p>");
Document w3Doc = W3CDom.convert(jsoup);
String xml = W3CDom.asString(w3Doc, W3CDom.OutputXml());
assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?><html><head/><body><インセンティブで高収入！>Text <p>More</p></body></html>", xml);
}
@Test
public void treatsUndeclaredNamespaceAsLocalName() {
String html = "<fb:like>One</fb:like>";
org.jsoup.nodes.Document doc = Jsoup.parse(html);
Document w3Doc = new W3CDom().fromJsoup(doc);
Node htmlEl = w3Doc.getFirstChild();
assertNull(htmlEl.getNamespaceURI());
assertEquals("html", htmlEl.getLocalName());
assertEquals("html", htmlEl.getNodeName());
Node fb = htmlEl.getFirstChild().getNextSibling().getFirstChild();
assertNull(fb.getNamespaceURI());
assertEquals("like", fb.getLocalName());
assertEquals("fb:like", fb.getNodeName());
}
@Test
public void xmlnsXpathTest() throws XPathExpressionException {
W3CDom w3c = new W3CDom();
String html = "<html><body><div>hello</div></body></html>";
Document dom = w3c.fromJsoup(Jsoup.parse(html));
NodeList nodeList = xpath(dom, "//body");// no ns, so needs no prefix
assertEquals("div", nodeList.item(0).getLocalName());
// default output is namespace aware, so query needs to be as well
html = "<html xmlns='http://www.w3.org/1999/xhtml'><body id='One'><div>hello</div></body></html>";
dom = w3c.fromJsoup(Jsoup.parse(html));
nodeList = xpath(dom, "//body");
assertNull(nodeList); // no matches
dom = w3c.fromJsoup(Jsoup.parse(html));
nodeList = xpath(dom, "//*[local-name()=\"body\"]");
assertNotNull(nodeList);
assertEquals(1, nodeList.getLength());
assertEquals("div", nodeList.item(0).getLocalName());
assertEquals("http://www.w3.org/1999/xhtml", nodeList.item(0).getNamespaceURI());
assertNull(nodeList.item(0).getPrefix());
// get rid of the name space awareness
String xml = w3c.asString(dom);
dom = parseXml(xml, false);
Node item = (Node) xpath(dom, "//body");
assertEquals("body", item.getNodeName());
assertNull(item.getNamespaceURI());
assertNull(item.getPrefix());
// put back, will get zero
dom = parseXml(xml, true);
nodeList = xpath(dom, "//body");
assertNull(nodeList);
}
private NodeList xpath(Document w3cDoc, String query) throws XPathExpressionException {
XPathExpression xpath = XPathFactory.newInstance().newXPath().compile(query);
return ((NodeList) xpath.evaluate(w3cDoc, XPathConstants.NODE));
}
@Test
public void testRoundTripDoctype() {
// TODO - not super happy with this output - but plain DOM doesn't let it out, and don't want to rebuild the writer
// because we have Saxon on the test classpath, the transformer will change to that, and so case may change (e.g. Java base in META, Saxon is meta for HTML)
String base = "<!DOCTYPE html><p>One</p>";
assertEqualsIgnoreCase("<!DOCTYPE html SYSTEM \"about:legacy-compat\"><html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body><p>One</p></body></html>",
output(base, true));
assertEqualsIgnoreCase("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE html SYSTEM \"about:legacy-compat\"><html><head/><body><p>One</p></body></html>", output(base, false));
String publicDoc = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">";
assertEqualsIgnoreCase("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body></body></html>", output(publicDoc, true));
// different impls will have different XML formatting. OpenJDK 13 default gives this: <body /> but others have <body/>, so just check start
assertTrue(output(publicDoc, false).startsWith("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE html PUBLIC"));
String systemDoc = "<!DOCTYPE html SYSTEM \"exampledtdfile.dtd\">";
assertEqualsIgnoreCase("<!DOCTYPE html SYSTEM \"exampledtdfile.dtd\"><html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body></body></html>", output(systemDoc, true));
assertEqualsIgnoreCase("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE html SYSTEM \"exampledtdfile.dtd\"><html><head/><body/></html>", output(systemDoc, false));
String legacyDoc = "<!DOCTYPE html SYSTEM \"about:legacy-compat\">";
assertEqualsIgnoreCase("<!DOCTYPE html SYSTEM \"about:legacy-compat\"><html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body></body></html>", output(legacyDoc, true));
assertEqualsIgnoreCase("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE html SYSTEM \"about:legacy-compat\"><html><head/><body/></html>", output(legacyDoc, false));
String noDoctype = "<p>One</p>";
assertEqualsIgnoreCase("<html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body><p>One</p></body></html>", output(noDoctype, true));
assertEqualsIgnoreCase("<?xml version=\"1.0\" encoding=\"UTF-8\"?><html><head/><body><p>One</p></body></html>", output(noDoctype, false));
}
private String output(String in, boolean modeHtml) {
org.jsoup.nodes.Document jdoc = Jsoup.parse(in);
Document w3c = W3CDom.convert(jdoc);
Map<String, String> properties = modeHtml ? W3CDom.OutputHtml() : W3CDom.OutputXml();
return TextUtil.normalizeSpaces(W3CDom.asString(w3c, properties));
}
private void assertEqualsIgnoreCase(String want, String have) {
assertEquals(want.toLowerCase(Locale.ROOT), have.toLowerCase(Locale.ROOT));
}
@Test public void convertsElementsAndMaintainsSource() {
org.jsoup.nodes.Document jdoc = Jsoup.parse("<body><div><p>One</div><div><p>Two");
W3CDom w3CDom = new W3CDom();
Element jDiv = jdoc.selectFirst("div");
assertNotNull(jDiv);
Document doc = w3CDom.fromJsoup(jDiv);
Node div = doc.getFirstChild();
assertEquals("div", div.getLocalName());
assertEquals(jDiv, div.getUserData(W3CDom.SourceProperty));
Node textNode = div.getFirstChild().getFirstChild();
assertEquals("One", textNode.getTextContent());
assertEquals(Node.TEXT_NODE, textNode.getNodeType());
org.jsoup.nodes.TextNode jText = (TextNode) jDiv.childNode(0).childNode(0);
assertEquals(jText, textNode.getUserData(W3CDom.SourceProperty));
}
}