如何使用R截取网站？

So I'm not 100% sure this is possible, but I found a good solution in Ruby and in python, so I was wondering if something similar might work in R.

所以我不是100％确定这是可能的，但我在Ruby和python中找到了一个很好的解决方案，所以我想知道类似的东西是否可以在R中起作用

Basically, given a URL, I want to render that URL, take a screenshot of the rendering as a .png, and save the screenshot to a specified folder. I'd like to do all of this on a headless linux server.

基本上，给定一个URL，我想呈现该URL，将呈现的屏幕截图作为.png，并将屏幕截图保存到指定的文件夹。我想在无头的linux服务器上做这一切。

Is my best solution here going to be running system calls to a tool like CutyCapt, or does there exist an R-based toolset that will help me solve this problem?

我最好的解决方案是运行系统调用CutyCapt这样的工具，还是存在一个基于R的工具集来帮助我解决这个问题？

2 个解决方案

#1

You can take screenshots using Selenium:

您可以使用Selenium截取屏幕截图：

library(RSelenium)
rD <- rsDriver(browser = "phantomjs")
remDr <- rD[['client']]
remDr$navigate("http://www.r-project.org")
remDr$screenshot(file = tf <- tempfile(fileext = ".png"))
shell.exec(tf) # on windows
remDr$close()
rD$server$stop()

In earlier versions, you were able to do:

在早期版本中，您可以执行以下操作：

library(RSelenium)
startServer()
remDr <- remoteDriver$new()
remDr$open()
remDr$navigate("http://www.r-project.org")
remDr$screenshot(file = tf <- tempfile(fileext = ".png"))
shell.exec(tf) # on windows

#2

I haven't tested it, but this open source project seems to do exactly that: https://github.com/wch/webshot

我还没有测试过，但是这个开源项目似乎正是这样做的：https：//github.com/wch/webshot

It is a easy as:

这很简单：

library(webshot)
webshot("https://www.r-project.org/", "r.png")

#1