Examples with PageFetcher - edu.uci.ics.crawler4j.fetcher.PageFetcher

Example 1 with PageFetcher

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

the class PageFetcherHtmlTest method testCustomPageFetcher.

@Test
public void testCustomPageFetcher() throws InterruptedException, PageBiggerThanMaxSizeException, IOException {
    WireMock.stubFor(WireMock.head(WireMock.urlEqualTo("/some/index.html")).willReturn(WireMock.aResponse().withStatus(200).withHeader("Content-Type", "text/html")));
    WireMock.stubFor(WireMock.get(WireMock.urlEqualTo("/some/index.html")).willReturn(WireMock.aResponse().withStatus(200).withHeader("Content-Type", "text/html").withHeader("Content-Length", "47").withBody("<html><body><h1>this is " + "html</h1></body></html>")));
    WireMock.stubFor(WireMock.get(WireMock.urlEqualTo("/some/invoice.pdf")).willReturn(WireMock.aResponse().withStatus(200).withHeader("Content-Type", "application/pdf").withBody(new byte[] { 1, 2, 3, 4 })));
    WireMock.stubFor(WireMock.head(WireMock.urlEqualTo("/some/invoice.pdf")).willReturn(WireMock.aResponse().withStatus(200).withHeader("Content-Type", "application/pdf")));
    CrawlConfig cfg = new CrawlConfig();
    WebURL url = new WebURL();
    url.setURL("http://localhost:8080/some/index.html");
    PageFetcher pf = new PageFetcherHtmlOnly(cfg);
    pf.fetchPage(url).fetchContent(new Page(url), 47);
    WireMock.verify(1, WireMock.headRequestedFor(WireMock.urlEqualTo("/some/index.html")));
    WireMock.verify(1, WireMock.getRequestedFor(WireMock.urlEqualTo("/some/index.html")));
    url.setURL("http://localhost:8080/some/invoice.pdf");
    pf = new PageFetcherHtmlOnly(cfg);
    pf.fetchPage(url).fetchContent(new Page(url), 4);
    WireMock.verify(1, WireMock.headRequestedFor(WireMock.urlEqualTo("/some/invoice.pdf")));
    WireMock.verify(0, WireMock.getRequestedFor(WireMock.urlEqualTo("/some/invoice.pdf")));
}

Also used : PageFetcher(edu.uci.ics.crawler4j.fetcher.PageFetcher) CrawlConfig(edu.uci.ics.crawler4j.crawler.CrawlConfig) WebURL(edu.uci.ics.crawler4j.url.WebURL) Page(edu.uci.ics.crawler4j.crawler.Page) Test(org.junit.Test)

Example 2 with PageFetcher

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

the class CrawlControllerFactory method newController.

public CrawlController newController(CrawlControllerOptions options) throws Exception {
    CrawlConfig config = new CrawlConfig();
    config.setCrawlStorageFolder(baseDir + options.getDir());
    config.setMaxDepthOfCrawling(options.getDepth());
    config.setPolitenessDelay(options.getDelay());
    config.setResumableCrawling(options.isResumeable());
    config.setDefaultHeaders(options.getHeaders());
    if (options.getPage() != -1) {
        config.setMaxPagesToFetch(options.getPage());
    }
    PageFetcher pageFetcher = new PageFetcher(config);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    return new CrawlController(config, pageFetcher, robotstxtServer);
}

Also used : PageFetcher(edu.uci.ics.crawler4j.fetcher.PageFetcher) RobotstxtServer(edu.uci.ics.crawler4j.robotstxt.RobotstxtServer) CrawlController(edu.uci.ics.crawler4j.crawler.CrawlController) CrawlConfig(edu.uci.ics.crawler4j.crawler.CrawlConfig) RobotstxtConfig(edu.uci.ics.crawler4j.robotstxt.RobotstxtConfig)

Example 3 with PageFetcher

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

the class MyControllerTest method main.

public static void main(String[] args) throws Exception {
    // #爬虫配置
    CrawlConfig config = new CrawlConfig();
    // #设置爬取深度
    config.setMaxDepthOfCrawling(5);
    // #设置页面抓取的最大数量
    config.setMaxPagesToFetch(Integer.MAX_VALUE);
    // 每次请求前等待200毫秒
    config.setPolitenessDelay(200);
    // 爬取数据存储文件夹
    config.setCrawlStorageFolder(System.getProperty("user.dir") + "/temp/crawl");
    // #设置代理
    // config.setProxyHost("proxyserver.example.com");
    // config.setProxyPort(8080);
    // config.setProxyUsername(username);
    // config.getProxyPassword(password);
    // #配置恢复停止/崩溃的爬虫
    // config.setResumableCrawling(true);
    // #实例化控制器
    PageFetcher pageFetcher = new PageFetcher(config);
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher);
    CrawlController controller = new CrawlController(config, pageFetcher, robotstxtServer);
    // #种子网址
    controller.addSeed("http://www.ics.uci.edu/~lopes/");
    controller.addSeed("http://www.ics.uci.edu/~welling/");
    controller.addSeed("http://www.ics.uci.edu/");
    // 爬虫并发数
    int numberOfCrawlers = 7;
    // #开始爬取网页(阻塞操作)
    controller.start(MyCrawler.class, numberOfCrawlers);
}

Example 4 with PageFetcher

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

the class MultipleCrawlerController method main.

public static void main(String[] args) throws Exception {
    // The folder where intermediate crawl data is stored (e.g. list of urls that are extracted from previously
    // fetched pages and need to be crawled later).
    String crawlStorageFolder = "/tmp/crawler4j/";
    CrawlConfig config1 = new CrawlConfig();
    CrawlConfig config2 = new CrawlConfig();
    // The two crawlers should have different storage folders for their intermediate data.
    config1.setCrawlStorageFolder(crawlStorageFolder + "/crawler1");
    config2.setCrawlStorageFolder(crawlStorageFolder + "/crawler2");
    config1.setPolitenessDelay(1000);
    config2.setPolitenessDelay(2000);
    config1.setMaxPagesToFetch(50);
    config2.setMaxPagesToFetch(100);
    // We will use different PageFetchers for the two crawlers.
    PageFetcher pageFetcher1 = new PageFetcher(config1);
    PageFetcher pageFetcher2 = new PageFetcher(config2);
    // We will use the same RobotstxtServer for both of the crawlers.
    RobotstxtConfig robotstxtConfig = new RobotstxtConfig();
    RobotstxtServer robotstxtServer = new RobotstxtServer(robotstxtConfig, pageFetcher1);
    CrawlController controller1 = new CrawlController(config1, pageFetcher1, robotstxtServer);
    CrawlController controller2 = new CrawlController(config2, pageFetcher2, robotstxtServer);
    List<String> crawler1Domains = ImmutableList.of("https://www.ics.uci.edu/", "https://www.cnn.com/");
    List<String> crawler2Domains = ImmutableList.of("https://en.wikipedia.org/");
    controller1.addSeed("https://www.ics.uci.edu/");
    controller1.addSeed("https://www.cnn.com/");
    controller1.addSeed("https://www.ics.uci.edu/~lopes/");
    controller1.addSeed("https://www.cnn.com/POLITICS/");
    controller2.addSeed("https://en.wikipedia.org/wiki/Main_Page");
    controller2.addSeed("https://en.wikipedia.org/wiki/Obama");
    controller2.addSeed("https://en.wikipedia.org/wiki/Bing");
    CrawlController.WebCrawlerFactory<BasicCrawler> factory1 = () -> new BasicCrawler(crawler1Domains);
    CrawlController.WebCrawlerFactory<BasicCrawler> factory2 = () -> new BasicCrawler(crawler2Domains);
    // The first crawler will have 5 concurrent threads and the second crawler will have 7 threads.
    controller1.startNonBlocking(factory1, 5);
    controller2.startNonBlocking(factory2, 7);
    controller1.waitUntilFinish();
    logger.info("Crawler 1 is finished.");
    controller2.waitUntilFinish();
    logger.info("Crawler 2 is finished.");
}

Example 5 with PageFetcher

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

the class ControllerWithShutdown 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);
    config.setPolitenessDelay(1000);
    // Unlimited number of pages can be crawled.
    config.setMaxPagesToFetch(-1);
    /*
     * 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("https://www.ics.uci.edu/~welling/");
    controller.addSeed("https://www.ics.uci.edu/~lopes/");
    controller.addSeed("https://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.startNonBlocking(BasicCrawler.class, numberOfCrawlers);
    // Wait for 30 seconds
    Thread.sleep(30 * 1000);
    // Send the shutdown request and then wait for finishing
    controller.shutdown();
    controller.waitUntilFinish();
}

Aggregations

CrawlConfig (edu.uci.ics.crawler4j.crawler.CrawlConfig)12 PageFetcher (edu.uci.ics.crawler4j.fetcher.PageFetcher)12 CrawlController (edu.uci.ics.crawler4j.crawler.CrawlController)10 RobotstxtConfig (edu.uci.ics.crawler4j.robotstxt.RobotstxtConfig)10 RobotstxtServer (edu.uci.ics.crawler4j.robotstxt.RobotstxtServer)10 Page (edu.uci.ics.crawler4j.crawler.Page)2 WebURL (edu.uci.ics.crawler4j.url.WebURL)2 Test (org.junit.Test)2 ComboPooledDataSource (com.mchange.v2.c3p0.ComboPooledDataSource)1 PostgresCrawlerFactory (edu.uci.ics.crawler4j.examples.crawler.PostgresCrawlerFactory)1 File (java.io.File)1 AtomicInteger (java.util.concurrent.atomic.AtomicInteger)1 Flyway (org.flywaydb.core.Flyway)1