HtmlUnit-找不到动态内容

时间:2018-10-29 01:55:52

标签: java dynamic htmlunit

加载此页面时,我对HtmlPage对象中返回的动态内容没有任何运气:https://www.fangraphs.com/leaders/splits-leaderboards?splitArr=5&strgroup=season&statgroup=1&startDate=2018-03-01&endDate=2018-11-01&filter=IP%7Cgt%7C0&position=P&statType=player&autoPt=true&players=&pg=0&pageItems=30&sort=22,1&splitArrPitch=&splitTeams=false

“ react-drop-test” div为空。我试图找到带有“导出数据”文本的锚点,以便可以单击它并以流的形式获取内容。

关于如何使HtmlPage包含动态内容的任何想法?

这里是我现在拥有的示例。锚永远不会返回任何元素。

    webClient = new WebClient(BrowserVersion.CHROME);
    webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
    webClient.getCookieManager().setCookiesEnabled(false);
    webClient.getOptions().setThrowExceptionOnScriptError(false);
    webClient.setAjaxController(new NicelyResynchronizingAjaxController());
    webClient.setJavaScriptTimeout(jsTimeout);
    updateJSErrorListener(webClient);

    int thisYear = year;
    if (isEarlySeason()) {
        thisYear = year - 1;
    }
    String leftyURL = "https://www.fangraphs.com/leaderssplits.aspx?splitArr=5&strgroup=season&statgroup=1&startDate=" + thisYear + "-03-01&endDate=" + year + "-11-01&filter=IP%7Cgt%7C0&position=P&statType=player&autoPt=true&players=&pg=0&pageItems=30&sort=22,1";

    HtmlPage page = webClient.getPage(leftyURL);

    HtmlAnchor leftyAnchor = null;
    HtmlDivision div = (HtmlDivision) page.getElementById("react-drop-test");
    List<HtmlElement> anchors = div.getElementsByTagName("a");
    for (DomElement anchor:anchors2) {
        if ((anchor.getAttribute("class").contains("data-export"))) {
            leftyAnchor = (HtmlAnchor) anchor;
            break;
        }
    }

    Page p = leftyAnchor.click();
    InputStream is = p.getWebResponse().getContentAsStream();
    List<List<String>> leftyCSV = readCSVFile(is);

1 个答案:

答案 0 :(得分:0)

另一个充满奇怪js的网页。因此,让我从一些一般性提示开始:

  • 如果不需要(或如果您不知道这会产生什么影响),请不要更改默认配置
  • 因为您的页面(或至少一部分)是由javscript呈现的,所以您必须在某个地方等待

最后:您需要HtmlUnit的更新版本才能完成工作,因为javascript impl misses one feature可以使此页面正常工作所使用的javascript代码。

要获取新的(SNAPSHOT)版本,您可以使用以下选项:

使用最新的代码库,它将为您完成这项工作:

String url = "https://www.fangraphs.com/leaders/splits-leaderboards?splitArr=5&strgroup=season&statgroup=1&startDate=2018-03-01&endDate=2018-11-01&filter=IP%7Cgt%7C0&position=P&statType=player&autoPt=true&players=&pg=0&pageItems=30&sort=22,1&splitArrPitch=&splitTeams=false";

try (final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_60)) {                                                                                                                                                                                                       
    webClient.getOptions().setThrowExceptionOnScriptError(false);                                                                                                                                                                                                                  

    HtmlPage page = webClient.getPage(url);                                                                                                                                                                                                                                        
    webClient.waitForBackgroundJavaScript(50000);                                                                                                                                                                                                                                  
    System.out.println("----------------");                                                                                                                                                                                                                                        
    System.out.println(page.asText());                                                                                                                                                                                                                                             

    HtmlDivision div = (HtmlDivision) page.getElementById("react-drop-test");                                                                                                                                                                                                      
    List<HtmlElement> anchors = div.getElementsByTagName("a");                                                                                                                                                                                                                     
    for (DomElement anchor:anchors) {                                                                                                                                                                                                                                              
        if ((anchor.getAttribute("class").contains("data-export"))) {                                                                                                                                                                                                              

            HtmlAnchor leftyAnchor = (HtmlAnchor) anchor;                                                                                                                                                                                                                          

            Page p = leftyAnchor.click();                                                                                                                                                                                                                                          
            System.out.println();                                                                                                                                                                                                                                                  
            System.out.println("----------------");                                                                                                                                                                                                                                
            System.out.println(p.getWebResponse().getContentAsString());                                                                                                                                                                                                           

            break;                                                                                                                                                                                                                                                                 
        }                                                                                                                                                                                                                                                                          
    }                                                                                                                                                                                                                                                                              
}