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15 package org.htmlunit.html.parser.neko;
16
17 import java.io.IOException;
18 import java.io.InputStream;
19 import java.io.StringReader;
20 import java.net.URL;
21 import java.nio.charset.Charset;
22 import java.util.ArrayList;
23 import java.util.List;
24 import java.util.Map;
25 import java.util.concurrent.ConcurrentHashMap;
26
27 import org.htmlunit.ObjectInstantiationException;
28 import org.htmlunit.Page;
29 import org.htmlunit.SgmlPage;
30 import org.htmlunit.WebAssert;
31 import org.htmlunit.WebClient;
32 import org.htmlunit.WebResponse;
33 import org.htmlunit.cyberneko.HTMLScanner;
34 import org.htmlunit.cyberneko.HTMLTagBalancer;
35 import org.htmlunit.cyberneko.xerces.util.DefaultErrorHandler;
36 import org.htmlunit.cyberneko.xerces.xni.QName;
37 import org.htmlunit.cyberneko.xerces.xni.XNIException;
38 import org.htmlunit.cyberneko.xerces.xni.parser.XMLErrorHandler;
39 import org.htmlunit.cyberneko.xerces.xni.parser.XMLInputSource;
40 import org.htmlunit.cyberneko.xerces.xni.parser.XMLParseException;
41 import org.htmlunit.html.DefaultElementFactory;
42 import org.htmlunit.html.DomNode;
43 import org.htmlunit.html.ElementFactory;
44 import org.htmlunit.html.Html;
45 import org.htmlunit.html.HtmlPage;
46 import org.htmlunit.html.UnknownElementFactory;
47 import org.htmlunit.html.parser.HTMLParser;
48 import org.htmlunit.html.parser.HTMLParserListener;
49 import org.htmlunit.svg.SvgElementFactory;
50 import org.htmlunit.util.StringUtils;
51 import org.w3c.dom.Node;
52 import org.xml.sax.SAXException;
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69 public final class HtmlUnitNekoHtmlParser implements HTMLParser {
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74 public static final SvgElementFactory SVG_FACTORY = new SvgElementFactory();
75
76 private static final Map<String, ElementFactory> ELEMENT_FACTORIES = new ConcurrentHashMap<>();
77
78 static {
79 final DefaultElementFactory defaultElementFactory = new DefaultElementFactory();
80 for (final String tagName : DefaultElementFactory.SUPPORTED_TAGS_) {
81 ELEMENT_FACTORIES.put(tagName, defaultElementFactory);
82 }
83 }
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85
86
87
88 @Override
89 public void parseFragment(final WebClient webClient, final DomNode parent, final DomNode context,
90 final String source, final boolean createdByJavascript)
91 throws SAXException, IOException {
92 final Page page = parent.getPage();
93 if (!(page instanceof HtmlPage htmlPage)) {
94 return;
95 }
96 final URL url = htmlPage.getUrl();
97
98 final HtmlUnitNekoDOMBuilder domBuilder =
99 new HtmlUnitNekoDOMBuilder(this, webClient, parent, url, source, createdByJavascript);
100 domBuilder.setFeature("http://cyberneko.org/html/features/balance-tags/document-fragment", true);
101
102 DomNode node = context;
103 final List<QName> ancestors = new ArrayList<>();
104 while (node != null && node.getNodeType() != Node.DOCUMENT_NODE) {
105 ancestors.add(0, new QName(null, node.getNodeName(), null, null));
106 node = node.getParentNode();
107 }
108 if (ancestors.isEmpty() || !"html".equals(ancestors.get(0).getLocalpart())) {
109 ancestors.add(new QName(null, "html", null, null));
110 ancestors.add(new QName(null, "body", null, null));
111 }
112 else if (ancestors.size() == 1
113 || (!"body".equals(ancestors.get(1).getLocalpart())
114 && !"head".equals(ancestors.get(1).getLocalpart()))) {
115 ancestors.add(new QName(null, "body", null, null));
116 }
117
118 domBuilder.setFeature(HTMLScanner.ALLOW_SELFCLOSING_TAGS, true);
119 domBuilder.setProperty(HTMLTagBalancer.FRAGMENT_CONTEXT_STACK, ancestors.toArray(new QName[0]));
120
121 final XMLInputSource in = new XMLInputSource(null, url.toString(), null, new StringReader(source), null);
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123 htmlPage.registerParsingStart();
124 htmlPage.registerSnippetParsingStart();
125 try {
126 domBuilder.parse(in);
127 }
128 finally {
129 htmlPage.registerParsingEnd();
130 htmlPage.registerSnippetParsingEnd();
131 }
132 }
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137 @Override
138 public void parse(final WebClient webClient, final WebResponse webResponse, final HtmlPage page,
139 final boolean xhtml, final boolean createdByJavascript) throws IOException {
140 final URL url = webResponse.getWebRequest().getUrl();
141 final HtmlUnitNekoDOMBuilder domBuilder =
142 new HtmlUnitNekoDOMBuilder(this, webClient, page, url, null, createdByJavascript);
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144 final Charset charset = webResponse.getContentCharset();
145 try {
146 if (!webResponse.wasContentCharsetTentative()) {
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148 domBuilder.setFeature(HTMLScanner.IGNORE_SPECIFIED_CHARSET, true);
149 }
150
151
152 if (xhtml) {
153 domBuilder.setFeature(HTMLScanner.ALLOW_SELFCLOSING_TAGS, true);
154 domBuilder.setFeature(HTMLScanner.SCRIPT_STRIP_CDATA_DELIMS, true);
155 domBuilder.setFeature(HTMLScanner.STYLE_STRIP_CDATA_DELIMS, true);
156 domBuilder.setFeature(HTMLScanner.CDATA_SECTIONS, true);
157 domBuilder.setFeature(HTMLScanner.CDATA_EARLY_CLOSING, false);
158 }
159
160 final int bufferSize = webClient.getOptions().getNekoReaderBufferSize();
161 if (bufferSize > 0) {
162 domBuilder.setProperty(HTMLScanner.READER_BUFFER_SIZE, bufferSize);
163 }
164 }
165 catch (final Exception e) {
166 throw new ObjectInstantiationException("Error setting HTML parser feature", e);
167 }
168
169 try (InputStream content = webResponse.getContentAsStream()) {
170 final String encoding = charset.name();
171 final XMLInputSource in = new XMLInputSource(null, url.toString(), null, content, encoding);
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173 page.registerParsingStart();
174 try {
175 domBuilder.parse(in);
176 }
177 catch (final XNIException e) {
178
179 final Throwable origin = extractNestedException(e);
180 throw new RuntimeException("Failed parsing content from " + url, origin);
181 }
182 }
183 finally {
184 page.registerParsingEnd();
185 }
186 }
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194 static Throwable extractNestedException(final Throwable e) {
195 Throwable originalException;
196 Throwable cause = e;
197 do {
198 originalException = cause;
199
200 if (cause instanceof XNIException) {
201 cause = cause.getCause();
202 }
203 else {
204 cause = null;
205 }
206 }
207 while (cause != null);
208
209 return originalException;
210 }
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215 @Override
216 public ElementFactory getSvgFactory() {
217 return SVG_FACTORY;
218 }
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223 @Override
224 public ElementFactory getFactory(final String tagName) {
225 final ElementFactory result = ELEMENT_FACTORIES.get(tagName);
226
227 if (result != null) {
228 return result;
229 }
230 return UnknownElementFactory.INSTANCE;
231 }
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244 @Override
245 public ElementFactory getElementFactory(final SgmlPage page, final String namespaceURI,
246 final String qualifiedName, final boolean insideSvg, final boolean svgSupport) {
247 if (insideSvg) {
248 return SVG_FACTORY;
249 }
250
251 if (namespaceURI == null || namespaceURI.isEmpty()
252 || Html.XHTML_NAMESPACE.equals(namespaceURI)
253 || Html.SVG_NAMESPACE.equals(namespaceURI)
254 || !qualifiedName.contains(":")) {
255
256 String tagName = qualifiedName;
257 final int index = tagName.indexOf(':');
258 if (index == -1) {
259 tagName = StringUtils.toRootLowerCase(tagName);
260 }
261 else {
262 tagName = tagName.substring(index + 1);
263 }
264 final ElementFactory factory;
265 if (svgSupport && !"svg".equals(tagName) && Html.SVG_NAMESPACE.equals(namespaceURI)) {
266 factory = SVG_FACTORY;
267 }
268 else {
269 factory = ELEMENT_FACTORIES.get(tagName);
270 }
271
272 if (factory != null) {
273 return factory;
274 }
275 }
276 return UnknownElementFactory.INSTANCE;
277 }
278 }
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283 class HtmlUnitNekoHTMLErrorHandler implements XMLErrorHandler {
284 private final HTMLParserListener listener_;
285 private final URL url_;
286 private final String html_;
287
288 HtmlUnitNekoHTMLErrorHandler(final HTMLParserListener listener, final URL url, final String htmlContent) {
289 WebAssert.notNull("listener", listener);
290 WebAssert.notNull("url", url);
291 listener_ = listener;
292 url_ = url;
293 html_ = htmlContent;
294 }
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300 @Override
301 public void error(final String domain, final String key,
302 final XMLParseException exception) throws XNIException {
303 listener_.error(exception.getMessage(),
304 url_,
305 html_,
306 exception.getLineNumber(),
307 exception.getColumnNumber(),
308 key);
309 }
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315 @Override
316 public void warning(final String domain, final String key,
317 final XMLParseException exception) throws XNIException {
318 listener_.warning(exception.getMessage(),
319 url_,
320 html_,
321 exception.getLineNumber(),
322 exception.getColumnNumber(),
323 key);
324 }
325
326 @Override
327 public void fatalError(final String domain, final String key,
328 final XMLParseException exception) throws XNIException {
329 listener_.error(exception.getMessage(),
330 url_,
331 html_,
332 exception.getLineNumber(),
333 exception.getColumnNumber(),
334 key);
335 }
336 }