如何点击htmlunit中的javascript按钮

Question

我正在尝试点击此网站上的搜索按钮:

http://www.amadeusepower.com/trek/portals/trek/default.aspx?Culture=en-US

按钮在这里的某个地方

<table cellpadding="0" cellspacing="0" class="QuickSearchFormFlightModuleButtonsTable"
                width="100%">
                <tr>
                    <td class="cell1">
                        <a id="ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_hlFlightDetailedSearch" href="javascript:if(typeof notRedirectToTop == 'undefined'){document.forms[0].target = '_top';}__doPostBack('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_hlFlightDetailedSearch', '');">Advanced options</a>
                    </td>
                    <td class="cell2">
                    </td>
                    <td class="cell3">

                    </td>
                    <td class="cell4">
                    </td>
                    <td class="cell5">
                        <script>DumpButtonHTML('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch','QuickSearchModuleFlightSearchStartSearchButton','QuickSearchModuleFlightSearchStartSearch','javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$ctl00$ctl00$cph1$cph1$QuickSearchAll1$QuickFlightSearchControl1$ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_LinkButton&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, true, true));LockButton(this,\'\',true);Loading(IsValidForTableButton(\'\',true),\'DefaultSplash_SplashScreen\',\'/trek/App_Themes/trek_theme1/Templates/SplashScreens/\',\'ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtSearch_txtFrom;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtSearch_txtTo;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtDepartureDate_txtDate;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtReturnDate_txtDate\');','True','Search','100px','True','','trek_theme1');</script>
                    </td>
                </tr>
            </table>

该按钮是站点左侧的搜索按钮.我使用HtmlUnitScripter附加组件为firefox生成一个类,但即使它生成了将填充表单的代码,它也不会生成将单击按钮的代码.

按下按钮后,会出现一个加载屏幕,然后显示结果.通常,下一个代码应该将结果页面返回到page变量中

HtmlElement theElement5 = (HtmlElement) page.getElementById("ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch");
page = (HtmlPage) theElement5.click();

但它只返回填写表单的上一页.有没有一种特殊的方法来处理这个按钮,或者我找不到合适的按钮来点击？任何帮助将不胜感激.

编辑:

我使用时得到的例外

ScriptResult result = page.executeJavaScript("document.getElementById('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_Table').onclick()");
final Page newPage = result.getNewPage();

在下面

Exception in thread "main" ======= EXCEPTION START ========
EcmaError: lineNumber=[64] column=[0] lineSource=[<no source>] name=[TypeError] sourceName=[http://www.amadeusepower.com/trek/Amadeus/js/Functions.js] message=[TypeError: Cannot read property "cancelBubble" from undefined (http://www.amadeusepower.com/trek/Amadeus/js/Functions.js#64)]
com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot read property "cancelBubble" from undefined (http://www.amadeusepower.com/trek/Amadeus/js/Functions.js#64)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:601)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:555)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:530)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:979)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScript(HtmlPage.java:947)
at htmlunittest.test.com.TestEkoBilet.main(TestEkoBilet.java:51)
Caused by: net.sourceforge.htmlunit.corejs.javascript.EcmaError: TypeError: Cannot read property "cancelBubble" from undefined (http://www.amadeusepower.com/trek/Amadeus/js/Functions.js#64)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3603)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3587)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError(ScriptRuntime.java:3608)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError2(ScriptRuntime.java:3624)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.undefReadError(ScriptRuntime.java:3634)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getObjectPropNoWarn(ScriptRuntime.java:1488)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1233)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at com.gargoylesoftware.htmlunit.javascript.host.EventHandler.call(EventHandler.java:81)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1531)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:275)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:546)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:654)
... 7 more
Enclosed exception: 
net.sourceforge.htmlunit.corejs.javascript.EcmaError: TypeError: Cannot read property "cancelBubble" from undefined (http://www.amadeusepower.com/trek/Amadeus/js/Functions.js#64)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3603)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3587)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError(ScriptRuntime.java:3608)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError2(ScriptRuntime.java:3624)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.undefReadError(ScriptRuntime.java:3634)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getObjectPropNoWarn(ScriptRuntime.java:1488)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1233)
at script.StopEvent(http://www.amadeusepower.com/trek/Amadeus/js/Functions.js:64)
at script.onclick(onclick event for HtmlTable[<table id="ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_Table" onmouseout="this.className='QuickSearchModuleFlightSearchStartSearchButton';" border="0" width="100px" class="QuickSearchModuleFlightSearchStartSearchButton" cellpadding="0" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$ctl00$ctl00$cph1$cph1$QuickSearchAll1$QuickFlightSearchControl1$ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_LinkButton&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, true, true));LockButton(this,'',true);Loading(IsValidForTableButton('',true),'DefaultSplash_SplashScreen','/trek/App_Themes/trek_theme1/Templates/SplashScreens/','ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtSearch_txtFrom;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtSearch_txtTo;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtDepartureDate_txtDate;ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_txtReturnDate_txtDate');StopEvent(event);" onmouseover="this.className='QuickSearchModuleFlightSearchStartSearchButtonOver';" style="cursor:pointer;cursor:hand;" cellspacing="0">] in http://www.amadeusepower.com/trek/portals/trek/default.aspx?Culture=en-US)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at com.gargoylesoftware.htmlunit.javascript.host.EventHandler.call(EventHandler.java:81)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1531)
at script(injected script:1)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:275)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:546)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:654)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:601)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:555)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:530)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:979)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScript(HtmlPage.java:947)
at htmlunittest.test.com.TestEkoBilet.main(TestEkoBilet.java:51)
======= EXCEPTION END ========

我认为它试图访问网站中的其他脚本,但它不在当前页面上.htmlunit是否仍然可以通过某些功能访问这些脚本,或者这是否可以实现？

编辑2:

我在页面开头附近找到了以下脚本.这与搜索按钮有关吗？它似乎有按钮的ID,但我不确定.

</script>
<form name="aspnetForm" method="post" action="default.aspx?Culture=en-US" onsubmit="javascript:return WebForm_OnSubmit();" onkeypress="javascript:return WebForm_FireDefaultButton(event, 'ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch')" id="aspnetForm">
  <div>
    <input type="hidden" name="__WPPS" id="__WPPS" value="s"/>
    <input type="hidden" name="__LASTFOCUS" id="__LASTFOCUS" value=""/>
    <input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value=""/>
    <input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value=""/>
    <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="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"/>
  </div>
  <script type="text/javascript">

Answer 1

如果您无法单击按钮,请尝试此操作

   HtmlElement htmlElement = page.getFirstByXPath("//*[@id=\"ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_Table\"]/tbody/tr/td[2]");
   htmlElement.click(); 

如果这不是你想要的,你已经处理了点击部分我建议尝试等待页面和JavaScript加载和执行.

试试这个

webClient.waitForBackgroundJavaScript(1000);

要么

webClient.setAjaxController(new NicelyResynchronizingAjaxController());
webClient.setAjaxController(new AjaxController(){
@Override
public boolean processSynchron(HtmlPage page, WebRequest request, boolean async)
{
return true;
}
});

要么

JavaScriptJobManager manager = page.getEnclosingWindow().getJobManager();
while (manager.getJobCount() > 0) {
Thread.sleep(100);
}

Answer 2

点击功能在表格元素中，试试这个（我自己没有尝试过）：

HtmlElement theElement5 = (HtmlElement) page.getElementById("ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_Table");
page = (HtmlPage) theElement5.click();

这不起作用，您可以启用调试级别的日志来查看发生了什么，或者尝试这个（适用于 FF）：

ScriptResult result = page.executeJavaScript("document.getElementById('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch_Table').onclick()");
final Page newPage = result.getNewPage();

提示：使用 Firebug 检查页面变量和元素，并使用 page.asXml() 获取页面的真实状态。