Examples with PageFetcher edu.uci.ics.crawler4j.fetcher.PageFetcher used on opensource projects

Example 6 with PageFetcher

use of edu.uci.ics.crawler4j.fetcher.PageFetcher in project crawler4j by yasserg.

the class StatusHandlerCrawlController method main.

public static void main(String[] args) throws Exception {
    if (args.length != 2) {
        logger.info("Needed parameters: ");
        logger.info("\t rootFolder (it will contain intermediate crawl data)");
        logger.info("\t numberOfCralwers (number of concurrent threads)");
        return;
    }
    /*
     * crawlStorageFolder is a folder where intermediate crawl data is
     * stored.
     */
    String crawlStorageFolder = args[0];
    /*
     * numberOfCrawlers shows the number of concurrent threads that should
     * be initiated for crawling.
     */
    int numberOfCrawlers = Integer.parseInt(args[1]);
    CrawlConfig config = new CrawlConfig();
    config.setCrawlStorageFolder(crawlStorageFolder);
    /*
     * Be polite: Make sure that we don't send more than 1 request per
     * second (1000 milliseconds between requests).
     */
    config.setPolitenessDelay(1000);
    /*
     * You can set the maximum crawl depth here. The default value is -1 for
     * unlimited depth
     */
    config.setMaxDepthOfCrawling(2);
    /*
     * You can set the maximum number of pages to crawl. The default value
     * is -1 for unlimited number of pages
     */
    config.setMaxPagesToFetch(1000);
    /*
     * Do you need to set a proxy? If so, you can use:
     * config.setProxyHost("proxyserver.example.com");
     * config.setProxyPort(8080);
     *
     * If your proxy also needs authentication:
     * config.setProxyUsername(username); config.getProxyPassword(password);
     */
    /*
     * This config parameter can be used to set your crawl to be resumable
     * (meaning that you can resume the crawl from a previously
     * interrupted/crashed crawl). Note: if you enable resuming feature and
     * want to start a fresh crawl, you need to delete the contents of
     * rootFolder manually.
     */
    config.setResumableCrawling(false);
    /*
     * Instantiate the controller for this crawl.
     */
    PageFetcher pageFetcher = new PageFetcher(config);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    CrawlController controller = new CrawlController(config, pageFetcher, robotstxtServer);
    /*
     * For each crawl, you need to add some seed urls. These are the first
     * URLs that are fetched and then the crawler starts following links
     * which are found in these pages
     */
    controller.addSeed("http://www.ics.uci.edu/~welling/");
    controller.addSeed("http://www.ics.uci.edu/~lopes/");
    controller.addSeed("http://www.ics.uci.edu/");
    /*
     * Start the crawl. This is a blocking operation, meaning that your code
     * will reach the line after this only when crawling is finished.
     */
    controller.start(StatusHandlerCrawler.class, numberOfCrawlers);
}

Example 7 with PageFetcher

use of edu.uci.ics.crawler4j.fetcher.PageFetcher in project crawler4j by yasserg.

the class BasicCrawlController method main.

public static void main(String[] args) throws Exception {
    if (args.length != 2) {
        logger.info("Needed parameters: ");
        logger.info("\t rootFolder (it will contain intermediate crawl data)");
        logger.info("\t numberOfCralwers (number of concurrent threads)");
        return;
    }
    /*
     * crawlStorageFolder is a folder where intermediate crawl data is
     * stored.
     */
    String crawlStorageFolder = args[0];
    /*
     * numberOfCrawlers shows the number of concurrent threads that should
     * be initiated for crawling.
     */
    int numberOfCrawlers = Integer.parseInt(args[1]);
    CrawlConfig config = new CrawlConfig();
    config.setCrawlStorageFolder(crawlStorageFolder);
    /*
     * Be polite: Make sure that we don't send more than 1 request per
     * second (1000 milliseconds between requests).
     */
    config.setPolitenessDelay(1000);
    /*
     * You can set the maximum crawl depth here. The default value is -1 for
     * unlimited depth
     */
    config.setMaxDepthOfCrawling(2);
    /*
     * You can set the maximum number of pages to crawl. The default value
     * is -1 for unlimited number of pages
     */
    config.setMaxPagesToFetch(1000);
    /**
         * Do you want crawler4j to crawl also binary data ?
         * example: the contents of pdf, or the metadata of images etc
         */
    config.setIncludeBinaryContentInCrawling(false);
    /*
     * Do you need to set a proxy? If so, you can use:
     * config.setProxyHost("proxyserver.example.com");
     * config.setProxyPort(8080);
     *
     * If your proxy also needs authentication:
     * config.setProxyUsername(username); config.getProxyPassword(password);
     */
    /*
     * This config parameter can be used to set your crawl to be resumable
     * (meaning that you can resume the crawl from a previously
     * interrupted/crashed crawl). Note: if you enable resuming feature and
     * want to start a fresh crawl, you need to delete the contents of
     * rootFolder manually.
     */
    config.setResumableCrawling(false);
    /*
     * Instantiate the controller for this crawl.
     */
    PageFetcher pageFetcher = new PageFetcher(config);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    CrawlController controller = new CrawlController(config, pageFetcher, robotstxtServer);
    /*
     * For each crawl, you need to add some seed urls. These are the first
     * URLs that are fetched and then the crawler starts following links
     * which are found in these pages
     */
    controller.addSeed("http://www.ics.uci.edu/");
    controller.addSeed("http://www.ics.uci.edu/~lopes/");
    controller.addSeed("http://www.ics.uci.edu/~welling/");
    /*
     * Start the crawl. This is a blocking operation, meaning that your code
     * will reach the line after this only when crawling is finished.
     */
    controller.start(BasicCrawler.class, numberOfCrawlers);
}

Example 8 with PageFetcher

use of edu.uci.ics.crawler4j.fetcher.PageFetcher in project crawler4j by yasserg.

the class LocalDataCollectorController method main.

public static void main(String[] args) throws Exception {
    if (args.length != 2) {
        logger.info("Needed parameters: ");
        logger.info("\t rootFolder (it will contain intermediate crawl data)");
        logger.info("\t numberOfCralwers (number of concurrent threads)");
        return;
    }
    String rootFolder = args[0];
    int numberOfCrawlers = Integer.parseInt(args[1]);
    CrawlConfig config = new CrawlConfig();
    config.setCrawlStorageFolder(rootFolder);
    config.setMaxPagesToFetch(10);
    config.setPolitenessDelay(1000);
    PageFetcher pageFetcher = new PageFetcher(config);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    CrawlController controller = new CrawlController(config, pageFetcher, robotstxtServer);
    controller.addSeed("http://www.ics.uci.edu/");
    controller.start(LocalDataCollectorCrawler.class, numberOfCrawlers);
    List<Object> crawlersLocalData = controller.getCrawlersLocalData();
    long totalLinks = 0;
    long totalTextSize = 0;
    int totalProcessedPages = 0;
    for (Object localData : crawlersLocalData) {
        CrawlStat stat = (CrawlStat) localData;
        totalLinks += stat.getTotalLinks();
        totalTextSize += stat.getTotalTextSize();
        totalProcessedPages += stat.getTotalProcessedPages();
    }
    logger.info("Aggregated Statistics:");
    logger.info("\tProcessed Pages: {}", totalProcessedPages);
    logger.info("\tTotal Links found: {}", totalLinks);
    logger.info("\tTotal Text Size: {}", totalTextSize);
}

Example 9 with PageFetcher

use of edu.uci.ics.crawler4j.fetcher.PageFetcher in project mastering-java by Kingminghuang.

the class Controller method main.

public static void main(String[] args) {
    String crawlStorageFolder = "D:\\crawl\\data";
    int numberOfCrawlers = 7;
    CrawlConfig crawlConfig = new CrawlConfig();
    crawlConfig.setCrawlStorageFolder(crawlStorageFolder);
    crawlConfig.setIncludeHttpsPages(true);
    crawlConfig.setProxyHost("cn-proxy.jp.oracle.com");
    crawlConfig.setProxyPort(80);
    crawlConfig.setPolitenessDelay(POLITENESS_DELAY);
    crawlConfig.setMaxDepthOfCrawling(MAX_DEPTH_OF_CRAWLING);
    PageFetcher pageFetcher = new PageFetcher(crawlConfig);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    try {
        CrawlController crawlController = new CrawlController(crawlConfig, pageFetcher, robotstxtServer);
        crawlController.addSeed("http://www.ics.uci.edu/~loops/");
        crawlController.addSeed("http://www.ics.uci.edu/~welling");
        crawlController.addSeed("http://www.ics.uci.edu/");
        crawlController.start(Crawler.class, numberOfCrawlers);
    } catch (Exception e) {
        e.printStackTrace();
    }
}