Ubuntu linux上的R和SSL/curl :在R中SSL连接失败，但在curl中可用

sudo apt-get update
sudo apt-get install libssl-dev

install.packages("openssl")
install.packages("curl")

Sys.setenv(SSL_CERT_FILE="/etc/ssl/certs/ca-certificates.crt")
Sys.setenv(SSL_CERT_DIR="/etc/ssl/certs")

library(httr)

# 设置SSL证书路径
set_config(config(ssl_verifypeer = TRUE, ssl_verifyhost = TRUE, cafile = "/etc/ssl/certs/ca-certificates.crt"))

# 进行HTTPS请求
response <- GET("https://example.com")
content(response)

sudo timedatectl set-time 'YYYY-MM-DD HH:MM:SS'
sudo timedatectl set-timezone Your/Timezone

library(RCurl)

# 设置SSL选项
opts <- RCurl::curlOptions(
  ssl.verifypeer = TRUE,
  ssl.verifyhost = TRUE,
  cainfo = "/etc/ssl/certs/ca-certificates.crt"
)

# 进行HTTPS请求
response <- getURL("https://example.com", .opts = opts)
print(response)

# 安装必要的包
install.packages("httr")
install.packages("openssl")

# 加载包
library(httr)
library(openssl)

# 设置SSL证书路径
set_config(config(ssl_verifypeer = TRUE, ssl_verifyhost = TRUE, cafile = "/etc/ssl/certs/ca-certificates.crt"))

# 进行HTTPS请求
response <- GET("https://example.com")
content(response)