How to set up rselenium for R?

问题

"everything was better back then"...

since firefox 49 (?) you can't use the rselenium package not straightforward anymore. I have searched the whole internet to find a SIMPLE How To Manual for setting up rselenium but did not find anything relevant and uptodate.

Can someone provide me and all the others out there who have no clue a simple How To manual? Like:

download XY
open AB

so I can run code like the following

require(RSelenium)

remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4444L, 
browserName = "firefox")
remDr$open()

回答1:

Download latest version of RSelenium >= 1.7.1. Run the following:

library(RSelenium)
rD <- rsDriver() # runs a chrome browser, wait for necessary files to download
remDr <- rD$client
# no need for remDr$open() browser should already be open

If you want a firefox browser use rsDriver(browser = "firefox").

This is detailed in http://rpubs.com/johndharrison/RSelenium-Basics appendix. The recommended way to run RSelenium is via Docker containers however. Instructions for use of Docker with RSelenium can be found at http://rpubs.com/johndharrison/RSelenium-Docker

ISSUES:

If you have issues which may occur due to admin rights or other variables such as anti-virus software you can run a Selenium server manually. The easiest way to do this is via the wdman package:

selCommand<- 
  wdman::selenium(jvmargs = c("-Dwebdriver.chrome.verboseLogging=true"), 
                  retcommand = TRUE)
> cat(selCommand)
C:\PROGRA~3\Oracle\Java\javapath\java.exe -Dwebdriver.chrome.verboseLogging=true -Dwebdriver.chrome.driver="C:\Users\john\AppData\Local\binman\binman_chromedriver\win32\2.27/chromedriver.exe" -Dwebdriver.gecko.driver="C:\Users\john\AppData\Local\binman\binman_geckodriver\win64\0.14.0/geckodriver.exe" -Dphantomjs.binary.path="C:\Users\john\AppData\Local\binman\binman_phantomjs\windows\2.1.1/phantomjs-2.1.1-windows/bin/phantomjs.exe" -jar "C:\Users\john\AppData\Local\binman\binman_seleniumserver\generic\3.0.1/selenium-server-standalone-3.0.1.jar" -port 4567

Using one of the wdman functions with the retcommand option enabled will return the commandline call that would have been ran.

Now you can run the output of cat(selCommand) in a terminal

C:\Users\john>C:\PROGRA~3\Oracle\Java\javapath\java.exe -Dwebdriver.chrome.verboseLogging=true -Dwebdriver.chrome.driver="C:\Users\john\AppData\Local\binman\binman_chromedriver\win32\2.27/chromedriver.exe" -Dwebdriver.gecko.driver="C:\Users\john\AppData\Local\binman\binman_geckodriver\win64\0.14.0/geckodriver.exe" -Dphantomjs.binary.path="C:\Users\john\AppData\Local\binman\binman_phantomjs\windows\2.1.1/phantomjs-2.1.1-windows/bin/phantomjs.exe" -jar "C:\Users\john\AppData\Local\binman\binman_seleniumserver\generic\3.0.1/selenium-server-standalone-3.0.1.jar" -port 4567
12:15:29.206 INFO - Selenium build info: version: '3.0.1', revision: '1969d75'
12:15:29.206 INFO - Launching a standalone Selenium Server
2017-02-08 12:15:29.223:INFO::main: Logging initialized @146ms
12:15:29.265 INFO - Driver class not found: com.opera.core.systems.OperaDriver
12:15:29.265 INFO - Driver provider com.opera.core.systems.OperaDriver registration is skipped:
Unable to create new instances on this machine.
12:15:29.265 INFO - Driver class not found: com.opera.core.systems.OperaDriver
12:15:29.266 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered
12:15:29.271 INFO - Driver provider org.openqa.selenium.safari.SafariDriver registration is skipped:
 registration capabilities Capabilities [{browserName=safari, version=, platform=MAC}] does not match the current platform WIN10
2017-02-08 12:15:29.302:INFO:osjs.Server:main: jetty-9.2.15.v20160210
2017-02-08 12:15:29.317:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler@c4c815{/,null,AVAILABLE}
2017-02-08 12:15:29.332:INFO:osjs.ServerConnector:main: Started ServerConnector@4af044{HTTP/1.1}{0.0.0.0:4567}
2017-02-08 12:15:29.333:INFO:osjs.Server:main: Started @257ms
12:15:29.334 INFO - Selenium Server is up and running

Now try and run a browser

remDr <- remoteDriver(port = 4567L, browserName = "chrome")
remDr$open()

If you are unable to manually run a Selenium Server then you will need to address your issues (including relevant log files) to the Selenium project or the appropriate driver project (chromedriver/geckodriver/ghostdirver etc.)

来源：https://stackoverflow.com/questions/42468831/how-to-set-up-rselenium-for-r

标签

rselenium