See the section in each example labelled as MAGIC for how to get the route pattern which matched the url path for each router.
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April 27, 2016 04:13
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Non-httprouter routers and how to write a response time tracker middleware for them
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package main | |
import ( | |
"log" | |
"net/http" | |
"time" | |
goji "goji.io" | |
"goji.io/middleware" | |
"goji.io/pat" | |
"golang.org/x/net/context" | |
) | |
func main() { | |
m := goji.NewMux() | |
m.HandleFuncC(pat.Get("/ordereditems/:key"), fake) | |
m.HandleFuncC(pat.Post("/ordereditems/:key"), fake) | |
m.HandleFuncC(pat.Get("/ordereditems/:key/items"), fake) | |
m.HandleFuncC(pat.Post("/ordereditems/:key/items"), fake) | |
m.HandleFuncC(pat.Put("/ordereditems/:key/items/:itemID/position"), fake) | |
m.UseC(tracker) | |
log.Println(http.ListenAndServe(":2380", m)) | |
} | |
func tracker(next goji.Handler) goji.Handler { | |
service := "myService" | |
f := func(ctx context.Context, w http.ResponseWriter, r *http.Request) { | |
start := time.Now() | |
next.ServeHTTPC(ctx, w, r) | |
// THIS IS THE MAGIC | |
p := middleware.Pattern(ctx) | |
// END MAGIC | |
log.Printf("track service %s path %s time %s", service, p, time.Since(start)) | |
} | |
return goji.HandlerFunc(f) | |
} | |
func fake(ctx context.Context, w http.ResponseWriter, r *http.Request) { | |
w.WriteHeader(http.StatusNoContent) | |
} |
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package main | |
import ( | |
"log" | |
"net/http" | |
"time" | |
"github.com/gorilla/mux" | |
) | |
func main() { | |
m := mux.NewRouter() | |
m.KeepContext = true // necessary for mux.CurrentRoute to work in middleware | |
s := m.PathPrefix("/ordereditems").Subrouter() | |
s.HandleFunc("/{key}", fake).Methods("GET") | |
s.HandleFunc("/{key}", fake).Methods("POST") | |
s.HandleFunc("/{key}/items", fake).Methods("POST", "GET") | |
s.HandleFunc("/{key}/items/{itemID}/position", fake).Methods("PUT") | |
log.Println(http.ListenAndServe(":2380", tracker(m))) | |
} | |
func tracker(next http.Handler) http.Handler { | |
service := "myService" | |
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | |
start := time.Now() | |
next.ServeHTTP(w, r) | |
// THIS IS THE MAGIC | |
route := mux.CurrentRoute(r) | |
if route == nil { | |
return | |
} | |
p, err := route.GetPathTemplate() | |
if err != nil { | |
p = "unknown_path" | |
} | |
// END MAGIC | |
log.Printf("track service %s path %s time %s", service, p, time.Since(start)) | |
}) | |
} | |
func fake(w http.ResponseWriter, r *http.Request) { | |
w.WriteHeader(http.StatusNoContent) | |
} |
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