26 lines
526 B
Go
26 lines
526 B
Go
// ## Middleware
|
|
|
|
package main
|
|
|
|
import "net/http"
|
|
import "fmt"
|
|
|
|
func hello(res http.ResponseWriter, req *http.Request) {
|
|
res.Header().Set("Content-Type", "text/plain")
|
|
fmt.Fprintln(res, "Hello wrapped world")
|
|
}
|
|
|
|
func wrapMiddleware(f http.HandlerFunc) http.HandlerFunc {
|
|
return func(res http.ResponseWriter, req *http.Request) {
|
|
fmt.Println("before")
|
|
f(res, req)
|
|
fmt.Println("after")
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
handler := wrapMiddleware(hello)
|
|
http.HandleFunc("/", handler)
|
|
http.ListenAndServe(":5000", nil)
|
|
}
|