go http middleware
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| package main
import (
"fmt"
"net/http"
"strings"
)
func buildHandlerChain(apiHandler http.Handler) http.Handler {
handler := WithAuthorization(apiHandler)
handler = WithAuthentication(handler)
return handler
}
func WithAuthentication(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
fmt.Printf("----handle Authentication-------\n")
handler.ServeHTTP(w, req)
})
}
func WithAuthorization(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
fmt.Printf("----handle Authorization-------\n")
handler.ServeHTTP(w, req)
})
}
func baseHandler(w http.ResponseWriter, req *http.Request) {
fmt.Println("----base handler----\n")
w.Write([]byte("hello handler!"))
}
func main() {
apiHandler := http.HandlerFunc(baseHandler)
http.Handle("/", buildHandlerChain(apiHandler))
http.ListenAndServe(":3000", nil)
}
|
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| ---- -------
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Reference