使用ROAuth的twitteR代理身份验证

我正在尝试使用RStudio的twitteR软件包。
但是我收到一个错误：

有时需要“需要代理身份验证”-“找不到主机”。

有许多线程存在相同的问题。
我已经尝试了一切（--internet2,R by setting "~/Rgui.exe" http_proxy=http:/999.99.99.99:8080/ http_proxy_user=ask）。但这没有用。

在我的代码下找到我的代码（我正在从我的办公室桌面RStudio运行），该代码需要身份验证：proxyuserpwd="**domain//username:pwd**"。

我不确定这条线。我尝试了各种组合，但均无效果。

rm(list=ls())
library(twitteR)
library(ROAuth)
library(RCurl)

options(RCurlOptions = list(
  verbose = TRUE,
  proxy ="http://proxy1.domain.com:8080",
  proxyuserpwd="domain//username:pwd",
  proxyauth="ntlm"))

reqURL <- "http://api.twitter.com/oauth/request_token"
accessURL <- "http://api.twitter.com/oauth/access_token"
authURL <- "http://api.twitter.com/oauth/authorize"
consumerKey <- '.............'
consumerSecret <- '..........'
twitCred <- OAuthFactory$new(consumerKey=consumerKey,
                          consumerSecret=consumerSecret,
                         requestURL=reqURL,
                         accessURL=accessURL,
                         authURL=authURL)

download.file(url="http://curl.haxx.se/ca/cacert.pem",destfile="cacert.pem")
twitCred$handshake(cainfo="cacert.pem")



< Proxy-Authenticate: BASIC realm="Access to this server requires AD Authentication.    Prefix your user ID with domain."
Host: api.twitter.com
Accept: */*
Proxy-Connection: Keep-Alive
Content-Length: 221
Content-Type: application/x-www-form-urlencoded

Error: Proxy Authentication Required
> registerTwitterOAuth(twitCred)
< HTTP/1.1 407 Proxy Authentication Required
* Authentication problem. Ignoring this.
< Proxy-Authenticate: NTLM
< Cache-Control: no-cache
< Pragma: no-cache
< Content-Type: text/html; charset=utf-8
* HTTP/1.1 proxy connection set close!
< Proxy-Connection: close
< Set-Cookie: BCSI-CS-3bf0ea03406bba28=2; Path=/
< Connection: close
< Content-Length: 899
< 
* Closing connection #0
Error in registerTwitterOAuth(twitCred) : 
oauth has not completed its handshake

但是，当我尝试以下代码时。

library("RCurl")
opts <- list(
proxy         = "proxy1.domain.com", 
proxyusername = "domain", 
proxypassword = "pwd",
proxyport     = 8080
)
getURL("http://stackoverflow.com", .opts = opts)

...我很成功。

>sessionInfo()  
R version 2.15.1 (2012-06-22)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] twitteR_1.1.7  rjson_0.2.13   ROAuth_0.9.3   digest_0.6.3   RCurl_1.95-4.1    bitops_1.0-5  

loaded via a namespace (and not attached):
[1] tools_2.15.1

我从这里尝试了多线程解决方案，但它们的解决方案均无效。我不确定我在哪里犯错。（这是我需要与用户名一起困扰的域名）有人可以对此问题有所了解吗？

更新：

当我在RGui中运行相同的代码（设置“〜/ Rgui.exe” http_proxy = http：/999.99.99.99：8080 / http_proxy_user = ask）时，它提示输入用户名和密码来下载cacert.pem。
但是，当我尝试握手时，会引发相同的错误：

错误：需要代理身份验证。

更新：

我收到以下错误：
Error in function (type, msg, asError = TRUE) : Received HTTP code 407 from proxy after CONNECT

如托马斯建议的更新-尝试

reqURL <- "https://api.twitter.com/oauth/request_token"
accessURL <- "https://api.twitter.com/oauth/access_token"
authURL <- "http://api.twitter.com/oauth/authorize"
consumerKey <- '-----'
consumerSecret <- '-------'
twitCred <- OAuthFactory$new(consumerKey=consumerKey,
                         consumerSecret=consumerSecret,
                         requestURL=reqURL,
                         accessURL=accessURL,
                         authURL=authURL)

h <- getCurlHandle(
proxy         = "proxy1.domain.com", 
proxyusername = "username",  #but i have to always prefix my domain with username(Domain\username or domain\\username or domain//username)
proxypassword = "password",
proxyport     = 8080,
cainfo = "cacert.pem")
twitCred$handshake(curl=h)

我收到以下错误，
Error in strsplit(response, "&") : non-character argument
我正在更新具有追溯输出的链接
5: strsplit(response, "&")
4: lapply(X = X, FUN = FUN, ...)
3: sapply(strsplit(response, "&")[[1]], strsplit, "=")
2: parseResponse(resp)
1: twitCred$handshake(curl = h)