在 Java 中使用 HtmlUnit 单击 Html 按钮

Question

我目前正在开发一个系统。我需要使用 Java 单击网站按钮。所以我正在使用 HtmlUnit 库。有一个名为https://tempmail.ninja/ 的网站会生成临时电子邮件。我需要的是单击 tempmail.ninja 中的“生成”按钮的程序，它会生成一封临时电子邮件。但问题是它没有点击。不生成电子邮件。

这是我尝试过的代码，

    try
    {
       WebClient webClient = new WebClient(BrowserVersion.CHROME);
       webClient.getOptions().setCssEnabled(true);
       webClient.getOptions().setJavaScriptEnabled(true);
       webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
       webClient.getOptions().setThrowExceptionOnScriptError(false);
       webClient.getOptions().setUseInsecureSSL(true);
       webClient.getCookieManager().setCookiesEnabled(true);
       HtmlPage page = webClient.getPage("https://tempmail.ninja");

       //Here is button id. Instead of this I used HtmlAnchor, HtmlSubmitInput and etc.
       //But any of those didn't work         
       HtmlButton htmlButton = page.getHtmlElementById("generaEmailTemporal");
       htmlButton.click();

       webClient.waitForBackgroundJavaScript(5000 * 2);   

       //Print the generated email but Currently nothing display
       HtmlTextInput htmlTextInput = (HtmlTextInput) page.getElementById("emailtemporal");
       System.out.println(htmlTextInput.getText());

       webClient.close();

    } catch(ElementNotFoundException | FailingHttpStatusCodeException | IOException ex) {
       Logger.getLogger(WebTesting.class.getName()).log(Level.SEVERE, null, ex);
    }

这里是按钮的 HTML 代码。我使用检查元素得到这个。

<p class="text-center" id="btnGeneraEmailTemporal">
<button class="btn btn-labeled btn-primary" id="generaEmailTemporal" type="button">
<span class="btn-label"><i class="fa fa-hand-o-right" aria-hidden="true"></i></span> Generate Temp Mail
</button>
</p>

我是 HtmlUnit 的新手。那么有人可以帮助我吗？我非常感谢。 谢谢你的帮助。

Answer 1

.click() 返回更改后的页面。所以你应该是这样的：

   HtmlButton htmlButton =  page.getHtmlElementById("generaEmailTemporal");
   HtmlPage pageAfterClick = (HtmlPage)htmlButton.click();
   webClient.waitForBackgroundJavaScript(5000 * 2);      
   System.out.println(pageAfterClick.asXml()); // often displaying the page-source is more useful during development than .asText()

由于 waitForBackgroundJavaScript(..) 是实验性的，并不总是有效，我更喜欢轮询，直到出现预期的文本。

private static final int AJAX_MAX_TRIES_SECONDS = 30;
private static final int ONE_SEC_IN_MILLISEC = 1000;

/** Waits until the given 'text' appeared or throws an
 * WaitingForAjaxTimeoutException if the 'text' does not appear before we timeout.
 * @param page
 * @param text The text which indicates that ajax has finished updating the page
 * @param waitingLogMessage Text for the log-output. Should indicate where in the code we are, and what are we waiting for
 * @throws WaitingForAjaxTimeoutException
 */
public static void waitForAjaxCallWaitUntilTextAppears(//
        @Nonnull final HtmlPage page, //
        @Nonnull final String text, //
        @Nonnull final String waitingLogMessage)  {
    LOGGER.debug("_5fd3fc9247_ waiting for ajax call to complete ... [" + waitingLogMessage + "]");
    final StringBuilder waitingdots = new StringBuilder("   ");
    for (int i = 0; i < AJAX_MAX_TRIES_SECONDS; i++) {

        if (page.asText().contains(text)) {
            waitingdots.append(" ajax has finished ['").append(text).append("' appeared]");
            LOGGER.debug("_8cd5a34faf_ " + waitingdots);
            return;
        }
        waitingdots.append('.');
        final long startTime = System.currentTimeMillis();
        while (System.currentTimeMillis() - startTime < ONE_SEC_IN_MILLISEC) {
            try {
                o.wait(ONE_SEC_IN_MILLISEC);
            }
            catch (final InterruptedException e) {
                // ignore
            }
        }

    }
    LOGGER.debug("_de5091bc9e_ "
            + waitingdots.append(" ajax timeout ['").append(text).append("' appeared NOT]").toString());
    LOGGER.debug("_f1030addf1_ page source:\n" + page.asXml());
    throw new RuntimeException("_ec3df4f228_");
}

Answer 2

我已经通过使用 Selenium Web Driver 解决了这个问题。使用 selenium 单击按钮并生成电子邮件并将其传递给 HtmlUnit。