RSelenium-rsDriver（浏览器="Firefox"）->拒绝连接

Question

我正在尝试在我的计算机中第一次使用Selenium。但是我在第一行中有一个错误：

我的代码：

library(RSelenium)

rD <- rsDriver(browser = "firefox")

错误消息：

 checking Selenium Server versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD
 BEGIN: POSTDOWNLOAD checking chromedriver versions: BEGIN: PREDOWNLOAD
 BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking geckodriver versions:
 BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking
 phantomjs versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN:
 POSTDOWNLOAD
 
    [1] "Connecting to remote server"
     Could not open firefox browser.
     Client error message:
     Undefined error in httr call. httr output: Failed to connect to localhost port 4567: Conection Refused
     Check server log for further details.
     Warning message:
     In rsDriver(browser = "firefox") : Could not determine server status.

我的操作系统是Linux薄荷，19.3，肉桂。

我安装了selenium-server-standalone-3.141.59。jar和geckodriver-v0。26

Answer 1

先试试这个：

suppressWarnings(tryCatch(rm(remDr),error=function(e){}))
suppressWarnings(tryCatch(rD),error=function(e){}))
gc()

#relaunch
library(RSelenium)
rD <- rsDriver(browser = "firefox")
remDr <- rD$client
remDr$navigate("https://www.duckduckgo.com")

或者：

#make sure lsof is installed on your system: 
#sudo apt-get install ssh-askpass lsof

system("kill -9 $(lsof -t -i:4567 -sTCP:LISTEN)")
#might need to be run sudo depending on your system
system("sudo kill -9 $(lsof -t -i:4567 -sTCP:LISTEN)")

#relaunch
library(RSelenium)
rD <- rsDriver(browser = "firefox")
remDr <- rD$client
remDr$navigate("https://www.duckduckgo.com")

如果这些都不起作用，那么您可能安装了错误的gecko驱动程序。从linux中卸载gecko驱动程序（sudo apt-get删除gecko驱动程序--purge）并从R（remove.packages（"RSelenium"））中卸载RSelenium。然后不要重新安装gecko驱动程序，但要确保您拥有所有的火狐依赖项（运行sudo apt-get install Firefox）。重新安装RSelenium（在R中），然后尝试重新启动，而无需手动下载gecko驱动程序。这样RSelenium将自动下载正确的gecko驱动程序版本。