我遇到了一行代码,可能会触发一些js函数,但是我怎么能解决这个问题呢?
box.setText(link.toString()); client.waitForBackgroundJavaScriptStartingBefore(10000); box.dblClick(); //this line cause the exception Exception in thread "main" ======= EXCEPTION START ======== EcmaError: lineNumber=[0] column=[0] lineSource=[function () {] name=[ReferenceError] sourceName=[onclick event for HtmlDivision[] in https://www.facebook.com/?_fb_noscript=1] message=[ReferenceError: "Bootloader" is not defined.] com.gargoylesoftware.htmlunit.ScriptException: ReferenceError: "Bootloader" is not defined. at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:684) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:616) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:591) at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptFunctionIfPossible(HtmlPage.java:985) at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeEventHandler(EventListenersContainer.java:210) at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeBubblingListeners(EventListenersContainer.java:230) at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:804) at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:738) at com.gargoylesoftware.htmlunit.html.HtmlElement$1.run(HtmlElement.java:869) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) at com.gargoylesoftware.htmlunit.html.HtmlElement.fireEvent(HtmlElement.java:874) at com.gargoylesoftware.htmlunit.html.HtmlElement.doClickFireClickEvent(HtmlElement.java:1311) at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1253) at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1205) at com.gargoylesoftware.htmlunit.html.HtmlElement.dblClick(HtmlElement.java:1351) at com.gargoylesoftware.htmlunit.html.HtmlElement.dblClick(HtmlElement.java:1326) at prototype.Profile.postLinkOnWall(Profile.java:225) at html.Log.findNext(Log.java:150) at prototype.Prtp.main(Prtp.java:49) Caused by: net.sourceforge.htmlunit.corejs.javascript.EcmaError: ReferenceError: "Bootloader" is not defined. 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.notFoundError(ScriptRuntime.java:3657) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.nameOrFunction(ScriptRuntime.java:1749) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.name(ScriptRuntime.java:1690) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1622) 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:309) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:103) at com.gargoylesoftware.htmlunit.javascript.host.EventHandler.call(EventHandler.java:81) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$4.doRun(JavaScriptEngine.java:609) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669) ... 21 more Enclosed exception: net.sourceforge.htmlunit.corejs.javascript.EcmaError: ReferenceError: "Bootloader" is not defined. 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.notFoundError(ScriptRuntime.java:3657) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.nameOrFunction(ScriptRuntime.java:1749) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.name(ScriptRuntime.java:1690) at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1622) at script.onclick(onclick event for HtmlDivision[] in https://www.facebook.com/?_fb_noscript=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:309) at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031) at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:103) at com.gargoylesoftware.htmlunit.javascript.host.EventHandler.call(EventHandler.java:81) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$4.doRun(JavaScriptEngine.java:609) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:616) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:591) at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptFunctionIfPossible(HtmlPage.java:985) at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeEventHandler(EventListenersContainer.java:210) at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeBubblingListeners(EventListenersContainer.java:230) at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:804) at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:738) at com.gargoylesoftware.htmlunit.html.HtmlElement$1.run(HtmlElement.java:869) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) at com.gargoylesoftware.htmlunit.html.HtmlElement.fireEvent(HtmlElement.java:874) at com.gargoylesoftware.htmlunit.html.HtmlElement.doClickFireClickEvent(HtmlElement.java:1311) at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1253) at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1205) at com.gargoylesoftware.htmlunit.html.HtmlElement.dblClick(HtmlElement.java:1351) at com.gargoylesoftware.htmlunit.html.HtmlElement.dblClick(HtmlElement.java:1326) at prototype.Profile.postLinkOnWall(Profile.java:225) at html.Log.findNext(Log.java:150) at prototype.Prtp.main(Prtp.java:49) == CALLING JAVASCRIPT == function () { [native code, arity=0] } ======= EXCEPTION END ========我写的框在普通的浏览器上运行一个重新格式化的函数,这个函数不是用HtmlUnit执行的,所以我试着用dbclick()来强制它.
2 个回答
HtmlUnit与JavaScript不兼容.它会经常抛出错误抱怨未定义的变量或函数.
从这个意义上说,现实生活中的浏览器(FireFox,Internet Explorer,Chrome等)更加灵活.这意味着它们将允许语法错误的HTML和JavaScript(例如:不定义函数或不结束HTML标记).
HtmlUnit期望一切都(几乎)完美.虽然,它会修复一些丢失的结束HTML标记,但一般来说,它希望页面中的代码不包含任何类型的错误.此外,即使一切看起来都正确,HtmlUnit甚至可能会抱怨.
您要考虑的一些项目是:
最重要的是在不同之间切换
BrowserVersions
.您可以在创建WebClient
对象时设置它们.事实证明,Internet Explorer(具有讽刺意味的是)在解释JavaScript方面给了我最好的结果确保您的HTML和JavaScript代码都正确无误
避免使用复杂的库(jQuery似乎得到了适当的支持)
尝试使用非最小化版本的库
如果您碰巧使用jQuery(或其他类似的库),请避免使用复杂的jQuery方法(例如:向元素动态添加事件)
当然,如果您可以控制从服务器获取的源代码,那么这些注释将适用.有时,事实并非如此.在这种情况下,你的双手更加紧密.
一种选择是用以下方法来抑制异常:
webClient.getOptions().setThrowExceptionOnScriptError(false);虽然,这将使您通过异常将不会更正任何JavaScript错误.这意味着如果抛出此异常的JS代码在您的逻辑中恰好是至关重要的,我的意思是,您绝对依赖于该代码的执行结果,那么您就不能让HtmlUnit处理您的JS.如果这恰好是AJAX请求的结果,那么您可以自己手动发出请求,而不是让HtmlUnit这样做.
另一方面,如果给你麻烦的JS代码在你的逻辑中并不重要,我的意思是,它可能只是隐藏一个元素或改变你不关心的颜色,然后抑制异常将是要走的路.
剩下的选择不多.
2023-02-13 15:43 回答Eva---LiuJ尝试设置您的Web客户端不要抛出异常:
client.getOptions().setThrowExceptionOnScriptError(false);2023-02-13 15:43 回答捕鱼达人2502931267撰写答案今天,你开发时遇到什么问题呢?立即提问