sijil pasang golang

x509: certificate signed by unknown authority

openssl s_client -connect example.com:443 < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > example.com.crt

sudo cp example.com.crt /usr/local/share/ca-certificates/

sudo update-ca-certificates

package main
 
import (
    "crypto/tls"
    "crypto/x509"
    "io/ioutil"
    "fmt"
    "net/http"
)
 
func main() {
    // 从文件载入证书
    cert, err := ioutil.ReadFile("example.com.crt")
    if err != nil {
        fmt.Println(err)
        return
    }
 
    pool := x509.NewCertPool()
 
    // 将证书添加到根证书池中
    if ok := pool.AppendCertsFromPEM(cert); !ok {
        fmt.Println("Failed to parse root certificate")
        return
    }
 
    tr := &http.Transport{
        TLSClientConfig: &tls.Config{
            RootCAs: pool,
        },
    }
 
    client := &http.Client{Transport: tr}
 
    _, err = client.Get("https://example.com")
    if err != nil {
        fmt.Println(err)
        return
    }
 
    fmt.Println("Success")
}

package main
 
import (
    "crypto/tls"
    "fmt"
    "net/http"
)
 
func main() {
    resp, err := http.Get("https://example.com")
    if err != nil {
        fmt.Println(err)
        return
    }
    defer resp.Body.Close()
    fmt.Println(resp.Status)
}