Session inside function

[markwsac]

Thanks for this great package. Great work!
How can we use session inside a function? The same session opens if I put outside the function...

open_chrome <- function() {
  session <- selenider_session("selenium", browser = "chrome",
                               options = selenium_options(
                                 client_options = selenium_client_options(
                                   capabilities = list(
                                     `goog:chromeOptions` = list(
                                       args = list("--window-size=1920,1080", "--log-level=3",
                                                   "--user-data-dir=C:\\Users\\xxxx\\AppData\\Local\\Google\\Chrome\\User Data",
                                                   "--profile-directory=Default"),
                                       excludeSwitches = list("disable-popup-blocking", "enable-logging")
                                     ))
                                 )
                               ))
  
return(session)  
}

session <- open_chrome()

Error --

Error in `create_selenium_client_internal()`:
! A Selenium session could not be started
Caused by error in `httr2::req_perform()`:
! HTTP 500 Internal Server Error.
✖ Session not created.
✖ Could not start a new session. Error while creating session with the driver service. Stopping driver service: Could not start a new session. Response code 500. Message: Chrome failed to start: exited normally.
    (DevToolsActivePort file doesn't exist)
    (The process started from chrome location C:\Program Files\Google\Chrome\Application\chrome.exe is no longer running, so ChromeDriver is assuming that Chrome has crashed.) 
  Host info: host: 'xxxx', ip: 'xxx.xxx.x.x'
  Build info: version: '4.25.0', revision: '030fcf7918'
  System info: os.name: 'Windows 11', os.arch: 'amd64', os.version: '10.0', java.version: '22'
  Driver info: driver.version: unknown
  Build info: version: '4.25.0', revision: '030fcf7918'
  System info: os.name: 'Windows 11', os.arch: 'amd64', os.version: '10.0', java.version: '22'
  Driver info: driver.version: unknown

[ashbythorpe]

By default, selenider_session() creates a session that only lasts as long as the current context, which in your case is the environment inside the open_chrome() function. This means that the session is closed when open_chrome() finishes executing. To change this, use the .env argument.

open_chrome <- function(.env = rlang::caller_env()) {
  selenider_session("selenium",
    browser = "chrome",
    options = selenium_options(
      client_options = selenium_client_options(
        capabilities = list(
          `goog:chromeOptions` = list(
            args = list(
              "--window-size=1920,1080", "--log-level=3",
              "--user-data-dir=C:\\Users\\xxxx\\AppData\\Local\\Google\\Chrome\\User Data",
              "--profile-directory=Default"
            ),
            excludeSwitches = list("disable-popup-blocking", "enable-logging")
          )
        )
      )
    ),
    .env = .env
  )
}

session <- open_chrome()