我对网络抓取完全不熟悉，我正在尝试使用RSelenium。我使用this连接docker工具箱：
但在尝试连接到远程服务器时仍然出现此错误：
> remDr$open()
[1] "Connecting to remote server"
Error in checkError(res) :
Undefined error in httr call. httr output: Failed to connect to localhost port 4445: Connection refused
另外，当我在docker toolbox terminal中运行它时
docker run -d -p 4445:4444 selenium/standalone-firefox
我明白了
e735076ce3ddcb183fe723dfda6dc0477bae8adf3550dc414880552e852be194
C:\Program Files\Docker Toolbox\docker.exe: Error response from daemon: driver failed programming external connectivity on endpoint jolly_wing (27a6446811ba909ea9a11af7a764bdeed31aaf06e6aeea10d99fc115f779f113): Bind for 0.0.0.0:4445 failed: port is already allocated.