/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nutch.indexer;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.nutch.crawl.CrawlDatum;
import org.apache.nutch.crawl.Inlinks;
import org.apache.nutch.crawl.SignatureFactory;
import org.apache.nutch.metadata.Metadata;
import org.apache.nutch.metadata.Nutch;
import org.apache.nutch.parse.Parse;
import org.apache.nutch.parse.ParseResult;
import org.apache.nutch.parse.ParseSegment;
import org.apache.nutch.parse.ParseUtil;
import org.apache.nutch.protocol.Content;
import org.apache.nutch.protocol.Protocol;
import org.apache.nutch.protocol.ProtocolFactory;
import org.apache.nutch.protocol.ProtocolOutput;
import org.apache.nutch.util.NutchConfiguration;
import org.apache.nutch.util.StringUtil;
import org.apache.nutch.util.URLUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Reads and parses a URL and run the indexers on it. Displays the fields obtained and the first
* 100 characters of their value
*
* Tested with e.g. ./nutch org.apache.nutch.indexer.IndexingFiltersChecker http://www.lemonde.fr
* @author Julien Nioche
**/
public class IndexingFiltersChecker extends Configured implements Tool {
public static final Logger LOG = LoggerFactory.getLogger(IndexingFiltersChecker.class);
public IndexingFiltersChecker() {
}
public int run(String[] args) throws Exception {
String contentType = null;
String url = null;
boolean dumpText = false;
String usage = "Usage: IndexingFiltersChecker [-dumpText] <url>";
if (args.length == 0) {
System.err.println(usage);
return -1;
}
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-dumpText")) {
dumpText = true;
} else if (i != args.length - 1) {
System.err.println(usage);
System.exit(-1);
} else {
url = URLUtil.toASCII(args[i]);
}
}
if (LOG.isInfoEnabled()) {
LOG.info("fetching: " + url);
}
IndexingFilters indexers = new IndexingFilters(conf);
ProtocolFactory factory = new ProtocolFactory(conf);
Protocol protocol = factory.getProtocol(url);
CrawlDatum datum = new CrawlDatum();
ProtocolOutput output = protocol.getProtocolOutput(new Text(url), datum);
IndexWriters writers = new IndexWriters(getConf());
if (!output.getStatus().isSuccess()) {
System.out.println("Fetch failed with protocol status: " + output.getStatus());
return 0;
}
Content content = output.getContent();
if (content == null) {
System.out.println("No content for " + url);
return 0;
}
contentType = content.getContentType();
if (contentType == null) {
return -1;
}
// store the guessed content type in the crawldatum
datum.getMetaData().put(new Text(Metadata.CONTENT_TYPE), new Text(contentType));
if (ParseSegment.isTruncated(content)) {
LOG.warn("Content is truncated, parse may fail!");
}
if (LOG.isInfoEnabled()) {
LOG.info("parsing: " + url);
LOG.info("contentType: " + contentType);
}
ParseResult parseResult = new ParseUtil(conf).parse(content);
NutchDocument doc = new NutchDocument();
doc.add("id", url);
Text urlText = new Text(url);
Inlinks inlinks = null;
Parse parse = parseResult.get(urlText);
byte[] signature = SignatureFactory.getSignature(conf).calculate(content,
parse);
parse.getData().getContentMeta()
.set(Nutch.SIGNATURE_KEY, StringUtil.toHexString(signature));
String digest = parse.getData().getContentMeta().get(Nutch.SIGNATURE_KEY);
doc.add("digest", digest);
try {
doc = indexers.filter(doc, parse, urlText, datum, inlinks);
} catch (IndexingException e) {
e.printStackTrace();
}
if (doc == null) {
System.out.println("Document discarded by indexing filter");
return 0;
}
for (String fname : doc.getFieldNames()) {
List<Object> values = doc.getField(fname).getValues();
if (values != null) {
for (Object value : values) {
String str = value.toString();
int minText = dumpText ? str.length() : Math.min(100, str.length());
System.out.println(fname + " :\t" + str.substring(0, minText));
}
}
}
if (conf.getBoolean("doIndex", false) && doc!=null){
writers.open(new JobConf(getConf()), "IndexingFilterChecker");
writers.write(doc);
writers.close();
}
return 0;
}
public static void main(String[] args) throws Exception {
final int res = ToolRunner.run(NutchConfiguration.create(),
new IndexingFiltersChecker(), args);
System.exit(res);
}
Configuration conf;
public Configuration getConf() {
return conf;
}
@Override
public void setConf(Configuration arg0) {
conf = arg0;
}
}