r - RSelenium RemoteDriver 未连接到端口 4445L

Question

我一直在关注 Docker/RSelenium 教程：https ://docs.ropensci.org/RSelenium/articles/docker.html

我已经成功地托管了我自己的 Selenium 服务器：

# sudo docker ps

CONTAINER ID   IMAGE                             COMMAND                  CREATED         STATUS         PORTS                              NAMES
0c673ba37477   selenium/standalone-chrome:88.0   "/opt/bin/entry_poin…"   3 minutes ago   Up 3 minutes   5900/tcp, 0.0.0.0:4445->4444/tcp   zealous_shannon

当我按照教程运行以下命令时：

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

我得到以下输出，没有错误消息：

[1] "Connecting to remote server"
$id
[1] NA

预期的输出是：

## [1] "Connecting to remote server"
## $applicationCacheEnabled
## [1] TRUE
## 
## $rotatable
## [1] FALSE
## 
## $handlesAlerts
## [1] TRUE
## 
## $databaseEnabled
## [1] TRUE
## 
## $version
## [1] "45.0.2"
## 
## $platform
## [1] "LINUX"
## 
## $nativeEvents
## [1] FALSE
## 
## $acceptSslCerts
## [1] TRUE
## 
## $webdriver.remote.sessionid
## [1] "644c353a-34b8-4bb4-bcff-746df5a30af8"
## 
## $webStorageEnabled
## [1] TRUE
## 
## $locationContextEnabled
## [1] TRUE
## 
## $browserName
## [1] "firefox"
## 
## $takesScreenshot
## [1] TRUE
## 
## $javascriptEnabled
## [1] TRUE
## 
## $cssSelectorsEnabled
## [1] TRUE
## 
## $id
## [1] "644c353a-34b8-4bb4-bcff-746df5a30af8"

这使我无法继续学习本教程。知道为什么我通过 RemoteDriver 的连接不能正常工作吗？

标签： rdockerseleniumrselenium

Answer 1

为您使用的操作系统和浏览器正确设置连接参数。如果图像基于chrome浏览器并且驱动程序的默认配置是firefox.

要更改此设置，您需要添加browserName = "chrome". 为了清楚起见，我建议始终添加服务器的 IP 地址，因此，添加remoteServerAddr = <<server IP>>

找出驱动程序的默认参数的方法是检查实例化的远程驱动程序，remDr它将向您显示驱动程序的默认配置是什么。

>remDr
$remoteServerAddr
[1] "localhost"

$port
[1] 4445

$browserName
[1] "firefox"

$version
[1] ""

$platform
[1] "ANY"

$javascript
[1] TRUE

$nativeEvents
[1] TRUE

$extraCapabilities
list()

所以在设置正确的参数后，我能够连接到暴露端口上的 RSelenum。

library(RSelenium)
> remDr <- remoteDriver(
+   remoteServerAddr = "localhost",
+   port = 4445L,
+   browserName = "chrome")
> remDr$open()
[1] "Connecting to remote server"
$acceptInsecureCerts
[1] FALSE

$browserName
[1] "chrome"

$browserVersion
[1] "88.0.4324.150"

$chrome
$chrome$chromedriverVersion
[1] "88.0.4324.96 (68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784})"

$chrome$userDataDir
[1] "/tmp/.com.google.Chrome.egZzL9"


$`goog:chromeOptions`
$`goog:chromeOptions`$debuggerAddress
[1] "localhost:36841"


$networkConnectionEnabled
[1] FALSE

$pageLoadStrategy
[1] "normal"

$platformName
[1] "linux"

$proxy
named list()

$`se:options`
$`se:options`$cdp
[1] "http://172.17.0.2:4444/session/eaed604c5fae33476755e4ba3e1c1d9e/se/cdp"


$setWindowRect
[1] TRUE

$strictFileInteractability
[1] FALSE

$timeouts
$timeouts$implicit
[1] 0

$timeouts$pageLoad
[1] 300000

$timeouts$script
[1] 30000


$unhandledPromptBehavior
[1] "dismiss and notify"

$`webauthn:extension:largeBlob`
[1] TRUE

$`webauthn:virtualAuthenticators`
[1] TRUE

$id
[1] "eaed604c5fae33476755e4ba3e1c1d9e"