==========背景===================
本人最近在R语言爬虫，但是有的网站是动态的json格式，每次找跳转的网址，好麻烦，因此，寻找新的方法，架构一个浏览器，在自己的浏览器里面寻找网址。于是有了以下的问题：

==========执行步骤分割线============
1、cmd启用 java -jar selenium-server-standalone-2.53.0.jar //启动selenium
2、R控制台
> library("Rwebdriver", lib.loc="C:/Program Files/R/R-3.2.3/library")
Loading required package: RCurl
Loading required package: bitops
Loading required package: RJSONIO
> library("XML", lib.loc="\\\\CNDOUW0000/Users/CNLeeWi/R/win-library/3.2")
> start_session(root = "http://localhost/wd/hub/" ,browser = "firefox")
Error in function (type, msg, asError = TRUE)  :
  Failed to connect to localhost port 80: Connection refused


=========相关资料链接================

http://www.r-bloggers.com/scraping-with-selenium/

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

https://github.com/coderLMN/AutomatedDataCollectionWithR/issues