java - HtmlUnit 不在页面内执行 Javascript

Question

我一直在使用 HtmlUnit 远程登录我的学校门户。据我了解，学校门户网站总是出现登录问题。我知道还有其他关于此主题的问题，但如果您不介意，请您看一下我的具体示例。

我想使用我的代码填写主页上的登录表单，然后访问我的个人资料。但是，htmlUnit 给我一个运行时错误并返回到主页。

我附上了我尝试执行的代码和我收到的错误。另外，我附上了我得到的输出(这不是我想要的)。 (这就是我最终想要获取的链接:https://mistar.oakland.k12.mi.us/novi/StudentPortal/Home/PortalMainPage)

public class MistarLogin {

public static void main(String[] args) throws Exception {

    //java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(java.util.logging.Level.OFF);
    //java.util.logging.Logger.getLogger("org.apache.http").setLevel(java.util.logging.Level.OFF);



    final WebClient webClient = new WebClient(BrowserVersion.CHROME);
    int javaScriptLeftNum = webClient.waitForBackgroundJavaScript(3000);



    // Get the first page
    HtmlPage firstPage = (HtmlPage) webClient.getPage("https://mistar.oakland.k12.mi.us/novi/StudentPortal");

    System.out.println(firstPage.asText());
    System.out.println("\n\n\n\n\n\n\n-------------------------------------------------------------------------------\n\n\n\n\n\n");

    // Get the form that we are dealing with and within that form,
    // find the submit button and the field that we want to change.
    HtmlForm form = firstPage.getFormByName("loginform");

    // Enter login and passwd
    //form.getInputByName("districtid").setValueAttribute("");
    form.getInputByName("Pin").setValueAttribute("email");
    form.getInputByName("Password").setValueAttribute("password");

    // Click "Sign In" button/link
     HtmlInput loginButton = form.getInputByValue("Log In");

     HtmlPage testPage = (HtmlPage) loginButton.click();

    // I added the cookie section but this returns a null pointer exception    
    Set<Cookie> cookie = webClient.getCookieManager().getCookies();

    if(cookie != null){

        Iterator<Cookie> i = cookie.iterator();

        while (i.hasNext()) {

            webClient.getCookieManager().addCookie(i.next());

        }

    }

   // final HtmlPage secondPage = loginButton.click();

然后打印出firstPage、testPage(输出是一样的)

<小时/>

这是我得到的输出:

  Student Portal
   District Website

学生门户登录用户名:
密码:
登录

0

诺维社区学区1

正在加载信息...

正在加载信息...

<小时/>

这是我得到的一个错误(最基本的错误):

com.gargoylesoftware.htmlunit.javascript.StrictErrorReporter 运行时错误严重:runtimeError:消息= [指定了无效或非法的选择器(选择器:':input [form =“loginform”]'错误:无效的选择器:*:input [form =“loginform”])。] sourceName = [https://mistar.oakland.k12.mi.us/novi/StudentPortal/Scripts/jquery-1.11.2.min.js?m=20150316043710] line=[2] lineSource=[null] lineOffset=[0]

附注抱歉格式化，我不熟悉 Stackoverflow 格式化规则。附言如有任何疑问，请询问。我会不断地关注这个问题。再次感谢你。

Answer 1

已经重写了您的代码以使其正常工作，希望有所帮助。请查看内联注释以了解如何解决您的问题。最后，您需要充分了解网络所基于的所有技术来实现网络自动化。希望您的学习能对此有所帮助。

    final String url = "https://mistar.oakland.k12.mi.us/novi/StudentPortal";

    try (final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_60)) {
        HtmlPage firstPage = webClient.getPage(url);
        // waitForBackgroundJavaScript has to be called after every action
        webClient.waitForBackgroundJavaScript(2000);

        System.out.println(firstPage.asText());
        System.out.println("-------------------------------------------------------------------------------");

        // Get the form that we are dealing with and within that form,
        // find the submit button and the field that we want to change.
        HtmlForm form = firstPage.getFormByName("loginform");

        // Enter login and passwd
        form.getInputByName("Pin").type(XXXX);
        form.getInputByName("Password").type(YYYY);

        // Click "Sign In" button/link
        HtmlInput loginButton = form.getInputByValue("Log In");
        loginButton.click();
        // wait until the js has done the job
        webClient.waitForBackgroundJavaScript(20000);

        // now get the current page content based on the current window; using
        // HtmlPage homePage = (HtmlPage) loginButton.click();
        // does not work because the page content is async replaced by javascript
        HtmlPage homePage = (HtmlPage) webClient.getCurrentWindow().getEnclosedPage();

        System.out.println(homePage.asText());
        System.out.println("-------------------------------------------------------------------------------");

        DomElement table = homePage.getElementById("stuBannerTable");
        for (DomElement tableRow : table.getElementsByTagName("tr")) {
            if (tableRow.asText().contains("Dmitry Kustarnikov") && tableRow.asText().contains("Novi High School (HS)")) {
                System.out.println("row found ");
                for (DomElement tableCell : table.getElementsByTagName("tr")) {
                    if (tableCell.asText().contains("Dmitry Kustarnikov")) {
                        System.out.println("cell found ");

                        tableCell.click();
                        webClient.waitForBackgroundJavaScript(20000);
                        HtmlPage detailsPage = (HtmlPage) webClient.getCurrentWindow().getEnclosedPage();

                        System.out.println(detailsPage.asText());
                        System.out.println("-------------------------------------------------------------------------------");
                        break;
                    }
                }
            }
        }
    }