无法执行 rsDriver（连接被拒绝）

Question

我无法使用 R selenium。这是第一步和我的输出：

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？

Answer 1

注意：此答案适用于 Windows

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

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.

Everybody 与 rsDriver 有问题，Docker 是推荐的选项，所以我们将走这条路：

install docker
运行它，按要求重启电脑
在命令行中通过运行ning 拉取图像：docker pull selenium/standalone-firefox（或 chrome 而不是 firefox）或在 R shell('docker pull selenium/standalone-firefox')
通过运行在命令行启动服务器：docker run -d -p 4445:4444 selenium/standalone-firefox 或在 R shell('docker run -d -p 4445:4444 selenium/standalone-firefox')
然后运行remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4445L, browserName = "firefox'")。文档建议使用虚拟机进行一些不同的操作，但我无法让它工作。

有了这个我就设置好了，这是我的代码：

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"

更多信息的文档：

Answer 2

万一它仍然有用，我今天运行遇到了同样的问题，并且能够通过安装 Java 开发工具包（Java SE 开发工具包 11.0 .1).

我从我的计算机收到一条错误消息，以及此问题中提到的相同 R 错误，并已修复。

对于一个可重现的例子，我能够复制这个 tutorial。

sessionInfo() R version 3.4.4 (2018-03-15) Platform: x86_64-apple-darwin15.6.0 (64-bit) Running under: macOS High Sierra 10.13.5

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.4/Resources/lib/libRlapack.dylib

locale:
[1] fr_CA.UTF-8/fr_CA.UTF-8/fr_CA.UTF-8/C/fr_CA.UTF-8/fr_CA.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] RSelenium_1.7.5

loaded via a namespace (and not attached):
[1] Rcpp_0.12.17     XML_3.98-1.11    binman_0.1.1     assertthat_0.2.0 rappdirs_0.3.1   bitops_1.0-6    
[7] R6_2.2.2         jsonlite_1.5     semver_0.2.0     httr_1.3.1       curl_3.2         xml2_1.2.0      
[13] subprocess_0.8.3 tools_3.4.4      wdman_0.2.4      yaml_2.1.18      compiler_3.4.4   caTools_1.17.1  
[19] openssl_1.0.1

Answer 3

根据 Cran 的小插图，我必须运行:

shell("docker-machine ip")

然后将remoteServerAddr设置为返回的IP。

无法执行 rsDriver（连接被拒绝）

can't execute rsDriver (connection refused)

r

docker

rselenium