无法执行 rsDriver(连接被拒绝) [英] can't execute rsDriver (connection refused)

问题描述

我无法使用 R selenium.这是第一步和我的输出:

I can't get anywhere with R selenium. Here's the first step and my output:

library(RSelenium)
rD <- rsDriver()
# checking Selenium Server versions:
#   BEGIN: PREDOWNLOAD
# BEGIN: DOWNLOAD
# BEGIN: POSTDOWNLOAD
# checking chromedriver versions:
#   BEGIN: PREDOWNLOAD
# BEGIN: DOWNLOAD
# BEGIN: POSTDOWNLOAD
# checking geckodriver versions:
#   BEGIN: PREDOWNLOAD
# BEGIN: DOWNLOAD
# BEGIN: POSTDOWNLOAD
# checking phantomjs versions:
#   BEGIN: PREDOWNLOAD
# BEGIN: DOWNLOAD
# BEGIN: POSTDOWNLOAD
# [1] "Connecting to remote server"
# Error in checkError(res) : 
#   Undefined error in httr call. httr output: Failed to connect to localhost port 4567: Connection refused
# In addition: Warning message:
#   In rsDriver() : Could not determine server status.

我错过了什么?

推荐答案

注意:此答案适用于 Windows

当尝试运行已弃用的 checkForServer() Selenium 提供了两个选项:

When trying to run the deprecated checkForServer() Selenium offers two options:

• 使用 rsDriver
• 使用 Docker

见:

RSelenium::checkForServer()
# Error: checkForServer is now defunct. Users in future can find the function in 
# file.path(find.package("RSelenium"), "examples/serverUtils"). The
# recommended way to run a selenium server is via Docker. Alternatively
# see the RSelenium::rsDriver function.

大家 似乎 rsDriver 有问题，Docker 是推荐选项，所以我们将走这条路线:

Everybody seems to have issues with rsDriver and Docker is the recommended option so we'll go this route:

• 安装 docker
• 运行它，按要求重新启动计算机
• 通过在命令行中运行来拉取图像:docker pull selenium/standalone-firefox(或 chrome 而不是 firefox)或在 R shell('docker pull selenium/standalone-firefox')
• 通过在命令行中运行来启动服务器:docker run -d -p 4445:4444 selenium/standalone-firefox 或在 R shell('docker run -d -p 4445:4444selenium/standalone-firefox')
• 然后运行 ​​remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4445L, browserName = "firefox") .该文档建议使用虚拟机进行一些不同的操作，但我无法使其正常工作.

• install docker
• run it, restart computer as requested
• pull image by running in command line: docker pull selenium/standalone-firefox(or chrome instead of firefox) or in R shell('docker pull selenium/standalone-firefox')
• start server by running in command line: docker run -d -p 4445:4444 selenium/standalone-firefox or in R shell('docker run -d -p 4445:4444 selenium/standalone-firefox')
• Then run remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4445L, browserName = "firefox'") . The doc suggests something different with a virtual machine but i couldn't get it to work.

这样我就设置好了，这是我的代码:

With this I was set, here is my code:

shell('docker run -d -p 4445:4444 selenium/standalone-firefox')
remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4445L, browserName = "firefox")
remDr$open()
remDr$navigate("http://www.google.com/ncr")
remDr$getTitle()
# [[1]]
# [1] "Google" 

了解更多信息的文档:

• https://cran.r-project.org/web/packages/RSelenium/vignettes/RSelenium-basics.html
• https://cran.r-project.org/web/packages/RSelenium/vignettes/RSelenium-docker.html

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