golangHow to get client IP from HTTP server
package main
import ( "fmt"; "net/http"; "strings" )
func ip(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, strings.Split(req.RemoteAddr, ":")[0])
}
func main() {
http.HandleFunc("/ip", ip)
http.ListenAndServe(":8222", nil)
}ctrl + cpackage maindefault package declaration | func main() {declare |
net/httphttp package to work with http protocol | strings.Split(req.RemoteAddr, ":")extract |
"/ip", iphandle | http.ListenAndServelaunch HTTP server |
8222port to listen HTTP server on | |
Usage example
package main
import ( "fmt"; "net/http"; "strings" )
func ip(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, strings.Split(req.RemoteAddr, ":")[0])
}
func main() {
http.HandleFunc("/ip", ip)
http.ListenAndServe(":8222", nil)
}output
# returns [ip] on "localhost:8222/hi" requestRelated
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