ImageCrawlController.java

/**
 * 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 edu.uci.ics.crawler4j.examples.imagecrawler;

import edu.uci.ics.crawler4j.crawler.CrawlConfig;
import edu.uci.ics.crawler4j.crawler.CrawlController;
import edu.uci.ics.crawler4j.fetcher.PageFetcher;
import edu.uci.ics.crawler4j.robotstxt.RobotstxtConfig;
import edu.uci.ics.crawler4j.robotstxt.RobotstxtServer;

/**
 * @author Yasser Ganjisaffar <lastname at gmail dot com>
 */

/*
 * IMPORTANT: Make sure that you update crawler4j.properties file and set
 * crawler.include_images to true
 */

public class ImageCrawlController {

	public static void main(String[] args) throws Exception {
		if (args.length < 3) {
			System.out.println("Needed parameters: ");
			System.out.println("\t rootFolder (it will contain intermediate crawl data)");
			System.out.println("\t numberOfCralwers (number of concurrent threads)");
			System.out.println("\t storageFolder (a folder for storing downloaded images)");
			return;
		}
		String rootFolder = args[0];
		int numberOfCrawlers = Integer.parseInt(args[1]);
		String storageFolder = args[2];

		CrawlConfig config = new CrawlConfig();

		config.setCrawlStorageFolder(rootFolder);

		/*
		 * Since images are binary content, we need to set this parameter to
		 * true to make sure they are included in the crawl.
		 */
		config.setIncludeBinaryContentInCrawling(true);

		String[] crawlDomains = new String[] { "http://uci.edu/" };

		PageFetcher pageFetcher = new PageFetcher(config);
		RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
		RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
		CrawlController controller = new CrawlController(config, pageFetcher, robotstxtServer);
		for (String domain : crawlDomains) {
			controller.addSeed(domain);
		}

		ImageCrawler.configure(crawlDomains, storageFolder);

		controller.start(ImageCrawler.class, numberOfCrawlers);
	}

}