RSelenium : connection refused error

Question

I'm trying to connect to Selenium server using the most recent version of RSelenium. Here is the code I used:

install.packages('RSelenium') library(RSelenium) remDr <- remoteDriver(remoteServerAddr = "localhost" , port = 4445L , browserName = "firefox" ) remDr$open()

The output is as follows:

Error in checkError(res) : Undefined error in httr call. httr output: Failed to connect to localhost port 4445: Connection refused

I have tried this solution (using the docker). I downloaded the docker from here (as I am using macOS 10.12.5) and added the executable to PATH. After running this code:

system('docker run -d -p 4445:4444 selenium/standalone-chrome')

I get this output:

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

I have tried some other solutions but none of them worked. Can you help me please?

It's a bit easier to use the included functions to run PhantomJS than Firefox/whatever. — alistaire
– alistaire, Commented Sep 3, 2017 at 22:33
Give splashr a try — cran.r-project.org/web/packages/splashr/index.html & github.com/hrbrmstr/splashr. It's an alternative to the Selenium ecosystem based on splash.readthedocs.io/en/stable — hrbrmstr
– hrbrmstr, Commented Sep 3, 2017 at 23:47
Having said that, did you install Docker from docker.com/docker-mac and did you verify the Docker "hello world" example works before attempting to use Selenium? — hrbrmstr
– hrbrmstr, Commented Sep 3, 2017 at 23:48
Your docker daemon isn't running. No issue with selenium. May be docker needs sudo user privileges. Try that! — harshavmb
– harshavmb, Commented Sep 4, 2017 at 3:10

Victor Burnett · Accepted Answer · 2018-08-16 20:49:44Z

You need administrator privileges to run a docker container, you can't do this inside an R Script unless it's run with administrator privileges. This goes for Windows or Mac users.

My recommendation is to run the command

docker run -d -p 4445:4444 selenium/standalone-chrome

inside a command-line shell you have opened with admin privileges.

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