use of org.apache.nutch.parse.HTMLMetaTags in project nutch by apache.
the class HtmlParser method getParse.
@Override
public ParseResult getParse(Content content) {
HTMLMetaTags metaTags = new HTMLMetaTags();
URL base;
try {
base = new URL(content.getBaseUrl());
} catch (MalformedURLException e) {
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
}
String text = "";
String title = "";
Outlink[] outlinks = new Outlink[0];
Metadata metadata = new Metadata();
// parse the content
DocumentFragment root;
try {
byte[] contentInOctets = content.getContent();
InputSource input = new InputSource(new ByteArrayInputStream(contentInOctets));
EncodingDetector detector = new EncodingDetector(conf);
detector.autoDetectClues(content, true);
detector.addClue(sniffCharacterEncoding(contentInOctets), "sniffed");
String encoding = detector.guessEncoding(content, defaultCharEncoding);
metadata.set(Metadata.ORIGINAL_CHAR_ENCODING, encoding);
metadata.set(Metadata.CHAR_ENCODING_FOR_CONVERSION, encoding);
input.setEncoding(encoding);
if (LOG.isTraceEnabled()) {
LOG.trace("Parsing...");
}
root = parse(input);
} catch (IOException e) {
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
} catch (DOMException e) {
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
} catch (SAXException e) {
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
} catch (Exception e) {
LOG.error("Error: ", e);
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
}
// get meta directives
HTMLMetaProcessor.getMetaTags(metaTags, root, base);
// populate Nutch metadata with HTML meta directives
metadata.addAll(metaTags.getGeneralTags());
if (LOG.isTraceEnabled()) {
LOG.trace("Meta tags for " + base + ": " + metaTags.toString());
}
// check meta directives
if (!metaTags.getNoIndex()) {
// okay to index
StringBuffer sb = new StringBuffer();
if (LOG.isTraceEnabled()) {
LOG.trace("Getting text...");
}
// extract text
utils.getText(sb, root);
text = sb.toString();
sb.setLength(0);
if (LOG.isTraceEnabled()) {
LOG.trace("Getting title...");
}
// extract title
utils.getTitle(sb, root);
title = sb.toString().trim();
}
if (!metaTags.getNoFollow()) {
// okay to follow links
// extract outlinks
ArrayList<Outlink> l = new ArrayList<Outlink>();
URL baseTag = base;
String baseTagHref = utils.getBase(root);
if (baseTagHref != null) {
try {
baseTag = new URL(base, baseTagHref);
} catch (MalformedURLException e) {
baseTag = base;
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("Getting links...");
}
utils.getOutlinks(baseTag, l, root);
outlinks = l.toArray(new Outlink[l.size()]);
if (LOG.isTraceEnabled()) {
LOG.trace("found " + outlinks.length + " outlinks in " + content.getUrl());
}
}
ParseStatus status = new ParseStatus(ParseStatus.SUCCESS);
if (metaTags.getRefresh()) {
status.setMinorCode(ParseStatus.SUCCESS_REDIRECT);
status.setArgs(new String[] { metaTags.getRefreshHref().toString(), Integer.toString(metaTags.getRefreshTime()) });
}
ParseData parseData = new ParseData(status, title, outlinks, content.getMetadata(), metadata);
ParseResult parseResult = ParseResult.createParseResult(content.getUrl(), new ParseImpl(text, parseData));
// run filters on parse
ParseResult filteredParse = this.htmlParseFilters.filter(content, parseResult, metaTags, root);
if (metaTags.getNoCache()) {
// not okay to cache
for (Map.Entry<org.apache.hadoop.io.Text, Parse> entry : filteredParse) entry.getValue().getData().getParseMeta().set(Nutch.CACHING_FORBIDDEN_KEY, cachingPolicy);
}
return filteredParse;
}
use of org.apache.nutch.parse.HTMLMetaTags in project nutch by apache.
the class TestRobotsMetaProcessor method testRobotsMetaProcessor.
@Test
public void testRobotsMetaProcessor() {
Configuration conf = NutchConfiguration.create();
TikaParser parser = new TikaParser();
parser.setConf(conf);
try {
currURLsAndAnswers = new URL[][] { { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org/foo/"), new URL("http://www.nutch.org/") }, { new URL("http://www.nutch.org"), new URL("http://www.nutch.org/base/") }, { new URL("http://www.nutch.org"), null } };
} catch (Exception e) {
Assert.assertTrue("couldn't make test URLs!", false);
}
for (int i = 0; i < tests.length; i++) {
byte[] bytes = tests[i].getBytes();
HTMLDocumentImpl doc = new HTMLDocumentImpl();
doc.setErrorChecking(false);
DocumentFragment root = doc.createDocumentFragment();
String url = "http://www.nutch.org";
Content content = new Content(url, url, bytes, "text/html", new Metadata(), conf);
Parse parse = null;
try {
parse = parser.getParse(content, doc, root).get(url);
} catch (Exception e) {
e.printStackTrace();
}
HTMLMetaTags robotsMeta = new HTMLMetaTags();
HTMLMetaProcessor.getMetaTags(robotsMeta, root, currURLsAndAnswers[i][0]);
Assert.assertEquals("got noindex wrong on test " + i, answers[i][0], robotsMeta.getNoIndex());
Assert.assertEquals("got nofollow wrong on test " + i, answers[i][1], robotsMeta.getNoFollow());
Assert.assertEquals("got nocache wrong on test " + i, answers[i][2], robotsMeta.getNoCache());
Assert.assertTrue("got base href wrong on test " + i + " (got " + robotsMeta.getBaseHref() + ")", ((robotsMeta.getBaseHref() == null) && (currURLsAndAnswers[i][1] == null)) || ((robotsMeta.getBaseHref() != null) && robotsMeta.getBaseHref().equals(currURLsAndAnswers[i][1])));
if (tests[i].contains("meta-refresh redirect")) {
// test for NUTCH-2589
URL metaRefreshUrl = robotsMeta.getRefreshHref();
Assert.assertNotNull("failed to get meta-refresh redirect", metaRefreshUrl);
Assert.assertEquals("failed to get meta-refresh redirect", "http://example.com/", metaRefreshUrl.toString());
Assert.assertEquals("failed to add meta-refresh redirect to parse status", "http://example.com/", parse.getData().getStatus().getArgs()[0]);
}
}
}
use of org.apache.nutch.parse.HTMLMetaTags in project nutch by apache.
the class TestRobotsMetaProcessor method testRobotsMetaProcessor.
@Test
public void testRobotsMetaProcessor() {
DOMFragmentParser parser = new DOMFragmentParser();
;
try {
currURLsAndAnswers = new URL[][] { { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org/foo/"), new URL("http://www.nutch.org/") }, { new URL("http://www.nutch.org"), new URL("http://www.nutch.org/base/") } };
} catch (Exception e) {
Assert.assertTrue("couldn't make test URLs!", false);
}
for (int i = 0; i < tests.length; i++) {
byte[] bytes = tests[i].getBytes();
DocumentFragment node = new HTMLDocumentImpl().createDocumentFragment();
try {
parser.parse(new InputSource(new ByteArrayInputStream(bytes)), node);
} catch (Exception e) {
e.printStackTrace();
}
HTMLMetaTags robotsMeta = new HTMLMetaTags();
HTMLMetaProcessor.getMetaTags(robotsMeta, node, currURLsAndAnswers[i][0]);
Assert.assertTrue("got index wrong on test " + i, robotsMeta.getNoIndex() == answers[i][0]);
Assert.assertTrue("got follow wrong on test " + i, robotsMeta.getNoFollow() == answers[i][1]);
Assert.assertTrue("got cache wrong on test " + i, robotsMeta.getNoCache() == answers[i][2]);
Assert.assertTrue("got base href wrong on test " + i + " (got " + robotsMeta.getBaseHref() + ")", ((robotsMeta.getBaseHref() == null) && (currURLsAndAnswers[i][1] == null)) || ((robotsMeta.getBaseHref() != null) && robotsMeta.getBaseHref().equals(currURLsAndAnswers[i][1])));
}
}
use of org.apache.nutch.parse.HTMLMetaTags in project nutch by apache.
the class TikaParser method getParse.
ParseResult getParse(Content content, HTMLDocumentImpl doc, DocumentFragment root) {
String mimeType = content.getContentType();
URL base;
try {
base = new URL(content.getBaseUrl());
} catch (MalformedURLException e) {
return new ParseStatus(e).getEmptyParseResult(content.getUrl(), getConf());
}
// get the right parser using the mime type as a clue
CompositeParser compositeParser = (CompositeParser) tikaConfig.getParser();
Parser parser = compositeParser.getParsers().get(MediaType.parse(mimeType));
if (parser == null) {
String message = "Can't retrieve Tika parser for mime-type " + mimeType;
LOG.error(message);
return new ParseStatus(ParseStatus.FAILED, message).getEmptyParseResult(content.getUrl(), getConf());
}
LOG.debug("Using Tika parser {} for mime-type {}.", parser.getClass().getName(), mimeType);
byte[] raw = content.getContent();
Metadata tikamd = new Metadata();
ContentHandler domHandler;
// Check whether to use Tika's BoilerplateContentHandler
if (useBoilerpipe && boilerpipeMimeTypes.contains(mimeType)) {
BoilerpipeContentHandler bpHandler = new BoilerpipeContentHandler((ContentHandler) new DOMBuilder(doc, root), BoilerpipeExtractorRepository.getExtractor(boilerpipeExtractorName));
bpHandler.setIncludeMarkup(true);
domHandler = (ContentHandler) bpHandler;
} else {
DOMBuilder domBuilder = new DOMBuilder(doc, root);
domBuilder.setUpperCaseElementNames(upperCaseElementNames);
domBuilder.setDefaultNamespaceURI(XHTMLContentHandler.XHTML);
domHandler = (ContentHandler) domBuilder;
}
LinkContentHandler linkContentHandler = new LinkContentHandler();
ParseContext context = new ParseContext();
if (parseEmbedded) {
context.set(Parser.class, new AutoDetectParser(tikaConfig));
}
TeeContentHandler teeContentHandler = new TeeContentHandler(domHandler, linkContentHandler);
if (HTMLMapper != null)
context.set(HtmlMapper.class, HTMLMapper);
tikamd.set(Metadata.CONTENT_TYPE, mimeType);
try {
parser.parse(new ByteArrayInputStream(raw), (ContentHandler) teeContentHandler, tikamd, context);
} catch (Exception e) {
LOG.error("Error parsing " + content.getUrl(), e);
return new ParseStatus(ParseStatus.FAILED, e.getMessage()).getEmptyParseResult(content.getUrl(), getConf());
}
HTMLMetaTags metaTags = new HTMLMetaTags();
String text = "";
String title = "";
Outlink[] outlinks = new Outlink[0];
org.apache.nutch.metadata.Metadata nutchMetadata = new org.apache.nutch.metadata.Metadata();
// we have converted the sax events generated by Tika into a DOM object
// so we can now use the usual HTML resources from Nutch
// get meta directives
HTMLMetaProcessor.getMetaTags(metaTags, root, base);
if (LOG.isTraceEnabled()) {
LOG.trace("Meta tags for " + base + ": " + metaTags.toString());
}
// check meta directives
if (!metaTags.getNoIndex()) {
// okay to index
StringBuffer sb = new StringBuffer();
if (LOG.isTraceEnabled()) {
LOG.trace("Getting text...");
}
// extract text
utils.getText(sb, root);
text = sb.toString();
sb.setLength(0);
if (LOG.isTraceEnabled()) {
LOG.trace("Getting title...");
}
// extract title
utils.getTitle(sb, root);
title = sb.toString().trim();
}
if (!metaTags.getNoFollow()) {
// okay to follow links
// extract outlinks
ArrayList<Outlink> l = new ArrayList<Outlink>();
URL baseTag = base;
String baseTagHref = tikamd.get("Content-Location");
if (baseTagHref != null) {
try {
baseTag = new URL(base, baseTagHref);
} catch (MalformedURLException e) {
LOG.trace("Invalid <base href=\"{}\">", baseTagHref);
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("Getting links (base URL = {}) ...", baseTag);
}
// pre-1233 outlink extraction
// utils.getOutlinks(baseTag != null ? baseTag : base, l, root);
// Get outlinks from Tika
List<Link> tikaExtractedOutlinks = linkContentHandler.getLinks();
utils.getOutlinks(baseTag, l, tikaExtractedOutlinks);
outlinks = l.toArray(new Outlink[l.size()]);
if (LOG.isTraceEnabled()) {
LOG.trace("found " + outlinks.length + " outlinks in " + content.getUrl());
}
}
// populate Nutch metadata with Tika metadata
String[] TikaMDNames = tikamd.names();
for (String tikaMDName : TikaMDNames) {
if (tikaMDName.equalsIgnoreCase(TikaCoreProperties.TITLE.toString()))
continue;
String[] values = tikamd.getValues(tikaMDName);
for (String v : values) {
nutchMetadata.add(tikaMDName, v);
if (tikaMDName.equalsIgnoreCase(Nutch.ROBOTS_METATAG) && nutchMetadata.get(Nutch.ROBOTS_METATAG) == null) {
// NUTCH-2720 force lowercase robots directive
nutchMetadata.add(Nutch.ROBOTS_METATAG, v);
}
}
}
if (outlinks.length == 0) {
outlinks = OutlinkExtractor.getOutlinks(text, getConf());
}
ParseStatus status = new ParseStatus(ParseStatus.SUCCESS);
if (metaTags.getRefresh()) {
status.setMinorCode(ParseStatus.SUCCESS_REDIRECT);
status.setArgs(new String[] { metaTags.getRefreshHref().toString(), Integer.toString(metaTags.getRefreshTime()) });
}
ParseData parseData = new ParseData(status, title, outlinks, content.getMetadata(), nutchMetadata);
ParseResult parseResult = ParseResult.createParseResult(content.getUrl(), new ParseImpl(text, parseData));
// run filters on parse
ParseResult filteredParse = this.htmlParseFilters.filter(content, parseResult, metaTags, root);
if (metaTags.getNoCache()) {
// not okay to cache
for (Map.Entry<org.apache.hadoop.io.Text, Parse> entry : filteredParse) entry.getValue().getData().getParseMeta().set(Nutch.CACHING_FORBIDDEN_KEY, cachingPolicy);
}
return filteredParse;
}
use of org.apache.nutch.parse.HTMLMetaTags in project nutch by apache.
the class TestRobotsMetaProcessor method testRobotsMetaProcessor.
@Test
public void testRobotsMetaProcessor() {
DOMFragmentParser parser = new DOMFragmentParser();
;
try {
currURLsAndAnswers = new URL[][] { { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org"), null }, { new URL("http://www.nutch.org/foo/"), new URL("http://www.nutch.org/") }, { new URL("http://www.nutch.org"), new URL("http://www.nutch.org/base/") } };
} catch (Exception e) {
Assert.assertTrue("couldn't make test URLs!", false);
}
for (int i = 0; i < tests.length; i++) {
byte[] bytes = tests[i].getBytes();
DocumentFragment node = new HTMLDocumentImpl().createDocumentFragment();
try {
parser.parse(new InputSource(new ByteArrayInputStream(bytes)), node);
} catch (Exception e) {
e.printStackTrace();
}
HTMLMetaTags robotsMeta = new HTMLMetaTags();
HTMLMetaProcessor.getMetaTags(robotsMeta, node, currURLsAndAnswers[i][0]);
Assert.assertTrue("got index wrong on test " + i, robotsMeta.getNoIndex() == answers[i][0]);
Assert.assertTrue("got follow wrong on test " + i, robotsMeta.getNoFollow() == answers[i][1]);
Assert.assertTrue("got cache wrong on test " + i, robotsMeta.getNoCache() == answers[i][2]);
Assert.assertTrue("got base href wrong on test " + i + " (got " + robotsMeta.getBaseHref() + ")", ((robotsMeta.getBaseHref() == null) && (currURLsAndAnswers[i][1] == null)) || ((robotsMeta.getBaseHref() != null) && robotsMeta.getBaseHref().equals(currURLsAndAnswers[i][1])));
}
}
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