http.Handler
下面是一个简单的例子:
http.HandlerHostSwitchServeHTTP(w http.ResponseWriter, r *http.Request)
1 2 3 4 5 6 7 8 9 10
type HostSwitch map[string]http.Handler
// Implement the ServerHTTP method
func (hs HostSwitch) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if handler, ok := hs[r.Host]; ok && handler != nil {
handler.ServeHTTP(w, r)
} else {
http.Error(w, "Forbidden", http.StatusForbidden)
}
}
在main 函数里使用:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the first home page!")
})
muxTwo := http.NewServeMux()
muxTwo.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the second home page!")
})
hs := make(HostSwitch)
hs["example-one.local:8080"] = mux
hs["example-two.local:8080"] = muxTwo
log.Fatal(http.ListenAndServe(":8080", hs))
}
总结
这里只是一个简单的使用 go 原生库实现的多域名映射。现在许多 web 框架都支持多域名、多字域名或泛域名请求。
本文网址: https://golangnote.com/topic/273.html 转摘请注明来源