checkError（res）中的错误：httr调用中未定义的错误。 httr输出：无法连接到本地主机端口4445：连接被拒绝 [英] Error in checkError(res) : Undefined error in httr call. httr output: Failed to connect to localhost port 4445: Connection refused

问题描述

我尝试使用RSelenium打开一个远程驱动程序，但是我仍然面对Docker的相同问题。

I try to open a remote driver with RSelenium but I keep on facing the same issue with Docker.

在Docker内运行

$ docker run -d -p 4445:4444 selenium/standalone-firefox:2.53.0

然后

$ docker ps

Docker返回

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a89435c68373 selenium/standalone-firefox:2.53.0 "/opt/bin/entry_poin…" About an hour ago Up About an hour 0.0.0.0:4445->4444/tcp determined_sammet

然后在R

remDr <- remoteDriver(port = 4445L)
remDr$open()

，我收到此错误

Error in checkError(res) : 
  Undefined error in httr call. httr output: Failed to connect to localhost port 4445: Connection refused

我不知道如何处理这个（事情。有人可以帮忙吗？谢谢

I can't figure out how to handle this. Can anyone help? Thanks

感谢Ralf Stubner命令

Thanks to Ralf Stubner the command

 remDr <- remoteDriver(remoteServerAddr = "yourIP", port = 4445L) 

已解决我的问题

推荐答案

我发现在两者之间进行睡眠似乎有助于避免此错误：

I've found putting a sleep in between seems to help avoid this error:

system("sudo docker pull selenium/standalone-chrome",wait=T)
Sys.sleep(5)
system("sudo docker run -d -p 4445:4444 selenium/standalone-chrome",wait=T)
Sys.sleep(5)
remDr <- remoteDriver(port=4445L, browserName="chrome")
Sys.sleep(15)
remDr$open()

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