问题
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")
回答1:
For me this works:
a<-getURL("https://example.sharepoint.com/_vti_bin/listdata.svc/Glossary", ssl.verifypeer=TRUE, sslversion=4L)
来源：https://stackoverflow.com/questions/21237469/r-specify-ssl-version-in-rcurl-geturl-statement