RSelenium抛出StaleElementReference错误

我想使用RSelenium刮这个网站link。我成功地抓取了网页上的大部分内容，但正试图进行“设施访问”和“设施投诉”。由于这两个按钮在使用开发人员工具检查它们时都具有javascript href，因此我一直使用phantomjs和RSelenium。RSelenium抛出StaleElementReference错误

我可以成功地通过幻影浏览网页，但每当我试图提取使用$用getElementText领域的文字，我抛出了以下错误：

Selenium message:{"errorMessage":"Element does not exist in cache","request":{"headers":{"Accept":"application/json, text/xml, application/xml, */*","Accept-Encoding":"gzip, deflate","Host":"localhost:4444","User-Agent":"libcurl/7.53.1 r-curl/2.6 httr/1.2.1"},"httpVersion":"1.1","method":"GET","url":"/attribute/id","urlParsed":{"anchor":"","query":"","file":"id","directory":"/attribute/","path":"/attribute/id","relative":"/attribute/id","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/attribute/id","queryKey":{},"chunks":["attribute","id"]},"urlOriginal":"/session/c0f30500-55d0-11e7-96dd-3b147ee40d88/element/:wdc:1497974074536/attribute/id"}} 

Show Traceback 
Error: Summary: StaleElementReference Detail: An element command failed because the referenced element is no longer attached to the DOM. class: org.openqa.selenium.StaleElementReferenceException Further Details: run errorDetails method

，当我使用$ CURRENTURL和$ screenship（display = T）显示正确的网站呈现和正确的链接。

我知道它是与如何元素附加到DOM，但我不知道如何解决这个问题中的R下面

代码：

url <- "https://dhs.arkansas.gov/dccece/cclas/FacilityInformation.aspx?FacilityNumber=23516" 
rd<-remoteDriver(browserName = 'phantomjs') 

rd$open() 

rd$navigate(url) 

webElem<- rd$findElement(using="xpath", value = '//*[@id="ctl00_ContentPlaceHolder1_lbtnVisits"]') 

webElem$clickElement() 

webElem$findElements('css',"#aspnetForm > div.page > div.main") 

webElem$getElementAttribute("id")

来源

2017-06-20 Harris2018

你可能会得到一个点击webElem，结果为StaleElementReference。

webElem元素可能在点击后在DOM中修改，因此如果您尝试再次“使用”webElem，它不再附加到DOM并被认为是“陈旧”。

一个简单的办法是简单地重新定位webElem被点击后：

webElem <- rd$findElement(... 
webElem$clickElement() 
webElem <- rd$findElement(... # re-locate webElem 
webElem$findElements('css',"#aspnetForm > div.page > div.main")

来源

2017-06-20 19:58:42

RSelenium抛出StaleElementReference错误

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