A brief analysis of Golang's method of requesting HTTPS

In today's online world, HTTPS has become one of the standard protocols in network transmission because it can provide encryption and communication authentication mechanisms based on SSL or TLS. For security and privacy reasons, more and more websites are using the HTTPS protocol to transmit information. In the development of Go language, how to request HTTPS has become a hot topic among many developers. This article will lead you to understand how to request HTTPS in Golang.

Golang is a powerful, easy-to-learn programming language that is widely used in many fields, such as web development, network programming, artificial intelligence, etc. In Go, we can use the standard library net/http for network communication. For HTTPS requests, we can use the http.Get() function in the standard library and specify the URL when requesting.

However, if your HTTPS site is private and requires certificate authentication, you will not be able to access the site normally. At this point, we need to specify the TLSClientConfig option of http.Transport in order to verify the certificate.

Specifically, the following code can be used to implement HTTPS requests:

import (
  "crypto/tls"
  "crypto/x509"
  "io/ioutil"
  "net/http"
)

func main() {
  certPool := x509.NewCertPool()
  pemData, err := ioutil.ReadFile("ca.crt")
  if err != nil {
    log.Fatalf("Failed to read CA certificate: %v", err)
  }
  certPool.AppendCertsFromPEM(pemData)

  tlsConfig := &tls.Config{
    RootCAs: certPool,
  }

  transport := &http.Transport{TLSClientConfig: tlsConfig}
  client := &http.Client{Transport: transport}

  resp, err := client.Get("https://example.com")
}

In the above code, we read the PEM file of the CA certificate into memory and then add it to Root certificate pool. We then created a TLS configuration that contained a pool of root certificates, and then created an http.Transport to use that TLS configuration. Finally, we create an http.Client and use it to perform https.Get() requests.

It is important to note that if your HTTPS site uses a self-signed certificate, you may need to set InsecureSkipVerify to true to avoid TLS verification errors. But this is not recommended as it makes your request unsafe. To ensure security, it is recommended to trust the certificate manually or use a certificate issued by a trusted CA.

The above is how to request HTTPS in Golang. I hope this can help you make better HTTPS requests.

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