CODEWITHSUNDEEP
rselenium
John Smith
John Smith

Reputation: 2886

RSelenium Connecting to a running server

I am trying to use Rselenium to automate some of my more tedious reporting tasks

I have downloaded the Java virtual machine as per the instructions I have gotten it running by using the code below

 # Run the Command at the command line
 cd selenium
 java -jar selenium-server-standalone-3.0.1.jar

In R i then add the following code

require(RSelenium)
remDr <- remoteDriver(remoteServerAddr = "localhost" 
                  , port = 4445L
                  , browserName = "firefox"
)

remDr <- remoteDriver(port = 4445L)

remDr$open()

When i run the last line i get the error

[1] "Connecting to remote server" Error in checkError(res) : Couldnt connect to host on http://localhost:4445/wd/hub. Please ensure a Selenium server is running.

I can see in the command line window that the server is running as i am getting the message Selenium Server is up and Running Can anyone see what I'm doing incorrectly?

Update

I have tried switching the port to 4444 as based on the advice below but i get the error

From the Cmd Prompt

Selenium message:The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases

From R

Error: Summary: UnknownError Detail: An unknown server-side error occurred while processing the command. class: java.lang.IllegalStateException Further Details: run errorDetails method

Upvotes: 1

Views: 5815

Answers (1)

jdharrison
jdharrison

Reputation: 30425

From Firefox version 48 the gecko driver is also required to drive a Firefox browser with Selenium Server. The geckodriver can be downloaded at https://github.com/mozilla/geckodriver/releases. If you wish to run the Selenium server manually you should then either

  • Add the geckodriver path to PATH
  • Or set the webdriver.gecko.driver system property on the JVM

The second method would be done as:

java -Dwebdriver.gecko.driver="path-to-geckodriver" -jar selenium-server-standalone-3.0.1.jar

If you are running windows and have downloaded the Selenium standalone to C:\Selenium and the geckodriver to the same location then this would look like:

C:\Users\john>cd C:\Selenium

C:\Selenium>java -Dwebdriver.gecko.driver="C:\Selenium\geckodriver.exe" -jar selenium-server-standalone-3.0.1.jar

NOTE: on a 32bit windows machine you will need the 32bit geckodriver and on a 64bit machine the corresponding 64bit geckodriver.

Alternatively the recommended way to run a Selenium server with RSelenium is to run a Docker container which includes the Selenium Server, geckodriver and appropriate Firefox browser:

docker run -d -p 5901:5900 -p 127.0.0.1:4444:4444 --link http-server selenium/standalone-firefox-debug:3.0.1-barium

see the vignette at http://rpubs.com/johndharrison/RSelenium-Docker

Upvotes: 4

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