An article analyzing how to determine whether a request is http or https in go

This article brings you relevant knowledge about go. It mainly talks about judging whether the request is http or https (used to obtain the current access address) in golang. Interested friends should take a look. I hope everyone has to help.

Determine whether the request is http or https in golang - used to obtain the current access address

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If reverse proxy such as nginx is not used

Then you can directly use the following code to confirm. The TLS field of the http.Request structure determines whether the request is used. HTTPS protocol. If this field is not nil, it means that the request uses the HTTPS protocol; otherwise, it means that the request uses the HTTP protocol

package main
import (
    "fmt"
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    if r.TLS != nil {
        fmt.Println("HTTPS request")
    } else {
        fmt.Println("HTTP request")
    }
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

In the case of reverse proxy

Above The code is invalid, you can use the following method

If you use nginx reverse proxy, you need to ensure that the following headers parameter X-Forwarded-Proto is passed in the reverse proxy

location / {
    proxy_pass http://your_upstream_server;
    proxy_set_header X-Forwarded-Proto $scheme;
}

You can judge this header to confirm whether https

package main
import (
    "fmt"
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    proto := r.Header.Get("X-Forwarded-Proto")
    if proto == "https" {
        fmt.Println("HTTPS request")
    } else {
        fmt.Println("HTTP request")
    }
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

To summarize, the function to obtain the current access address

//获取当前访问的Host
func GetHost(r *http.Request) (Url string) {
    scheme := "http://"
    if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
        scheme = "https://"
    }
    return strings.Join([]string{scheme, r.Host}, "")}

[Related recommendations: Go video tutorial 】

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