Question

我的问题：

我正在尝试抓取网页

#start selenium
selServ <- selenium()
# check ports
selServ$log()$stderr 
# conect using port
sel <- remoteDr(browserName = "chrome", port = 4567) 
# go to the URL 
sel %>% 
go("https://jurispub.admin.ch/publiws/pub/search.jsf")
# hit search button
sel %>% 
findElement("name", "form:searchSubmitButton") %>%  # find the submit button 
  elementClick() # click it

接下来，我使用循环获取一些数据，在循环结束时，我让Selenium单击下一个按钮：

i <- 1
while (i <= nr+1) {
Sys.sleep(0.5)
sel %>% 
getPageSource() %>% # like read_html()
html_node("table.iceDatTbl") -> dtbl  # this is the data table
sel %>%
findElement("xpath", ".//img[contains(@src, 'arrow-next')]/../../a") %>% 
elementClick() # go to next page}

但是，经过一定时间（循环次数随机）后，我收到此错误消息：

Error detected:
Response status code : 200 
Selenium Status code:  10 

Selenium Status summary:  StaleElementReference 
Selenium Status detail:  An element command failed because the referenced element is no longer attached to the DOM. 
Selenium message:  stale element reference: element is not attached to the page document
  (Session info: chrome=69.0.3497.100)
  (Driver info: chromedriver=70.0.3538.16 (16ed95b41bb05e565b11fb66ac33c660b721f778),platform=Windows NT 10.0.17134 x86_64) 
Please check the response with errorResponse()
Please check the content returned with errorContent()

> errorContent()

[1] "stale element reference: element is not attached to the page document\n

我的方法

我认为单击下一个按钮会导致错误，因为这是循环中的唯一单击

sel %>%
        findElement("xpath", ".//img[contains(@src, 'arrow-next')]/../../a") %>% 
        elementClick() # go to next page

我找到了这篇文章，我认为我有一个类似的问题： RSelenium throwing StaleElementReference error

但是，我不知道如何在我的代码中实现它。

更新

这与StaleElementReference Exception in PageFactory略有不同因为我已经在findElement()之前实现了elementClick() 我的问题更类似于RSelenium cannot access DOM

，我尝试实施此解决方案，即 JavaScript点击：

 # go to next page  
  sel %>% findElement("xpath", ".//img[contains(@src, 'arrow-next')]") -> resu
  executeScript(sel,"arguments[0].click();", args=list(resu))

但是，我仍然收到“随机的” StaleElementReference错误..（不那么频繁）：，（我的代码中还有其他内容会导致此错误吗？

Selenium Server错误：引用的元素不再附加到DOM

0 个答案: