我正在尝试使用Golang中间件在处理Gorilla Mux路由之后运行,以便更改每个请求的响应。
请参见以下代码示例。当前它返回“run before, run test”,目标是使用runsafter中间件返回“run before, run test, run after”。
使用Gorilla Mux是否可能实现此类操作?
package main
import (
"fmt"
"github.com/gorilla/mux"
"net/http"
)
func runsbefore(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("run before, "))
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
func runsafter(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("run after, "))
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
func runtest(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("run test, "))
}
func main() {
fmt.Println("Server starting on port 8000")
r := mux.NewRouter()
r.HandleFunc("/", runtest).Methods("GET")
http.ListenAndServe(":8000", runsbefore(r))
// something like: http.ListenAndServe(":8000", runsbefore(r(runsafter)))
}