I'm trying to store a screenshot from Selenium to a variable so I can work out it's height:
library(RSelenium)
library(magick)
server <- remoteDriver(remoteServerAddr = "localhost",
port = 4444,
browserName = "firefox")
server$open()
server$navigate("https://google.com")
screenshot <- server$screenshot(display = FALSE)
image_info(screenshot)
Error: The 'image' argument is not a magick image object.
Strangely, this works if I output server$screenshot to a file and load it back in:
server$screenshot(display = FALSE, file"/home/person/img.png")
blankPNG <- image_read("/home/person/img.png")
I know that server$screenshot returns a "base64 encoded PNG", but how can I read it as such? print(screenshot) returns a string.
Finally found it:
library('base64enc')
# this returns a list of base64 characters
screenshot <- server$screenshot(display = FALSE)
# converts the base64 characters into a vector
screenshot <- base64decode(toString(screenshot), output = NULL)
# reads the vector as stores it as a PNG
screenshot <- image_read(screenshot)