RSelenium无法连接远程服务器，启动Chrome驱动失败求助

问题重现 #

之前正常运行的RSelenium启动代码现在报错：

library(RSelenium)
library(rvest)
library(tidyverse)

driver <- rsDriver(port = 4845L, browser = "chrome", version = "3.141.59")
remdriv <- driver$client

报错信息 #

运行后返回错误：

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
Warning: Could not determine server status.[1] "Connecting to remote server"
Could not open chrome browser.
Client error message:
Undefined error in httr call. httr output: Failed to connect to localhost port 4845: Connection refused
Check server log for further details.

排查日志 #

使用wdman查看Selenium服务日志，发现Java无法找到主类，问题出在chromedriver路径的参数解析上：

library(wdman)
selServ <- wdman::selenium(verbose = FALSE)
selServ$log()

日志输出：

$stderr
[1] "Error: Could not find or load main class c(-Dwebdriver.chrome.driver=\"C:\\Users\\Name\\AppData\\Local\\binman\\binman_chromedriver\\win32\\109.0.5414.25.chromedriver.exe\","
[2] "Caused by: java.lang.ClassNotFoundException: c(-Dwebdriver.chrome.driver=\"C:\\Users\\Name\\AppData\\Local\\binman\\binman_chromedriver\\win32\\109.0.5414.25.chromedriver.exe\","

$stdout
character(0)

解决思路 #

1. 修正参数指定方式 #

RSelenium新版本中，version参数对应Selenium Server版本，chromedriver版本需要用chromever参数单独指定，不要混用。示例：

# 先确认本地Chrome版本（设置→关于Chrome），比如109.0.5414.25
driver <- rsDriver(
  port = 4845L,
  browser = "chrome",
  version = "3.141.59", # Selenium Server版本
  chromever = "109.0.5414.25" # 对应Chrome版本的chromedriver
)
remdriv <- driver$client

2. 清理旧驱动缓存并重新下载 #

删除binman存储的旧chromedriver文件，路径为C:\\Users\\Name\\AppData\\Local\\binman\\binman_chromedriver，然后重新运行启动代码，让RSelenium自动下载匹配版本的驱动。

3. 升级相关包 #

RSelenium和wdman的旧版本可能存在参数解析bug，运行以下命令升级：

update.packages(c("RSelenium", "wdman"))

4. 手动指定驱动路径（备选） #

如果自动下载仍有问题，手动下载对应版本的chromedriver，然后通过extraCapabilities指定路径：

driver <- rsDriver(
  port = 4845L,
  browser = "chrome",
  chromever = "109.0.5414.25",
  extraCapabilities = list(
    chromeOptions = list(
      binary = "C:/Program Files/Google/Chrome/Application/chrome.exe"
    )
  )
)

内容的提问来源于stack exchange，提问作者matt_lnrd