R：在Rcurl getURL语句中指定SSL版本 [英] R: Specify SSL version in Rcurl getURL statement

问题描述

目标
我正在尝试编写一条语句以连接到共享点在线列表以检索要在R中使用的数据。

背景
这是我第一次使用RCurl / curl / libcurl，我试图阅读该文档，但超出了我的范围，没有任何相关示例。 p>

使用

  a< -getURL（ https：// example。 sharepoint.com/_vti_bin/listdata.svc/词汇表）
  

导致错误

 函数错误（类型，msg，asError = TRUE）：
与example.sharepoint.com连接时发生未知的SSL协议错误： 443 
  

结合Google和解密的libcurl文档后发现，问题出在SSL类型。我在shell中使用curl进行了验证，结果得到了SharePoint Server的肯定答复（好吧，除了需要添加用户名和密码）

  curl https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary -v -SSLv3 
  

问题
我无法计算出如何在RTFM之后在getURL（）函数中包含-SSLv3参数

请求的解决方案
修改此语句以使用SSLv3

  a< -getURL（ https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary）
  

解决方案

对我来说这可行：

  a< -getURL（ https：/ /example.sharepoint.com/_vti_bin/listdata.svc/Glossary\"，ssl.verifypeer=TRUE，sslversion=4L）
  

Aim I am trying to write a statement to connect to a sharepoint online list to retrieve the data for use in R.

Background This is my first time using RCurl/curl/libcurl and I've attempted to read the documentation but it's beyond me and doesn't have any relevant examples.

Using

a<-getURL("https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary")

Resulted in an error

Error in function (type, msg, asError = TRUE)  : 
  Unknown SSL protocol error in connection to example.sharepoint.com:443 

A combination of google and deciphering of cryptic libcurl documentation identified that the issue was due to the SSL type. I used curl in shell to verify and I got a positive response from the sharepoint server as a result (well, except the need to add the user name and password)

curl https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary -v -SSLv3

Problem I cannot work out how to include the -SSLv3 argument in my getURL() function after RTFMs

Requested solution Amend this statement to utilise SSLv3

a<-getURL("https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary")

解决方案

For me this works:

a<-getURL("https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary", ssl.verifypeer=TRUE, sslversion=4L) 

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