由于不是web-programming方面的Maven，我尝试自动化一项任务，该任务包括进入一个网站，下载一些csv文件，最后将它们导入R中进行数据分析。
在这种情况下，我正在工作下面的示例代码在互联网上找到，这已经定制了一点我的需要，并想知道更多关于产生的错误：

library(RCurl)
curl = getCurlHandle()
curlSetOpt(cookiejar = 'cookies.txt', followlocation = TRUE, autoreferer = 
TRUE, curl = curl)

# Load the page for the first time to capture VIEWSTATE:

html <- getURL('https://www.olisnet.com/OlisAuthenticate/JSP/login.jsp',  
curl = curl, 
           .opts=list(ssl.verifypeer=FALSE))

# Extract VIEWSTATE with a regular expression or any other tool:

viewstate <- as.character(sub('.*id="__VIEWSTATE" value="([0-9a-zA-  
Z+/=]*).*', '\\1', html))

# Set the parameters as your username, password and the VIEWSTATE:

params <- list(
'user'         = '<USERNAME>',
'pass'         = '<PASSWORD>',
'__VIEWSTATE'                                  = viewstate
)

html = postForm('https://www.olisnet.com/OlisAuthenticate/JSP/login.jsp',   
.params = params, curl = curl,.opts=list(ssl.verifypeer=FALSE))     
 Error: Proxy Authentication Required

# Verify if you are logged in:
grepl('Logout', html)
[1]FALSE

谢谢