Question

我在Windows上的R中尝试了以下代码：

library(RCurl)
postForm("https://www.google.com/accounts/ClientLogin/",
    "email" = "me@gmail.com",
    "Passwd" = "abcd",
    "service" = "finance",
    "source" = "Test-1"
)

但是出现以下错误：

Error in postForm()
SL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

如何设置RCurl以允许使用HTTP？

Answer 1

只需将.opts = list（ssl.verifypeer = FALSE）添加到您的查询中

postForm("https://www.google.com/accounts/ClientLogin/",
    "email" = "me@gmail.com",
    "Passwd" = "abcd",
    "service" = "finance",
    "source" = "Test-1",
    .opts = list(ssl.verifypeer = FALSE))

Answer 2

您需要安装SSL库。

对于Windows，您可以在这里获得一个：Download "OpenSSL for Windows" version 0.9.8k
解压缩到临时文件夹，然后复制文件“libeay32.dll”和 “ssleay32.dll”从“bin”子文件夹到R \ library \ RCurl \ lib \ i386。
您也可以将其复制到与R.exe相同的目录中。

然后检查您是否有权访问https协议：

library(RCurl)
curlVersion()$protocol 
## [1] "tftp"   "ftp"    "telnet" "dict"   "ldap"   "http"   "file"   "https"     
## [9] "ftps"   "scp"    "sftp"

然后安装一组新的凭据文件：

ca-bundle.crt可在以下网址找到：http://curl.haxx.se/ca/cacert.pem

重命名/复制到ca-bundle.crt

用此测试：

getURL("https://www.google.com/accounts/ClientLogin/?service=finance&email=me@gmail.com&Passwd=abcd&source=Test-1", 
       cainfo = "path to R/library/RCurl/CurlSSL/ca-bundle.crt")

使用Rcurl和HTTPs

2 个答案: