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- package middleware
-
- import (
- "expvar"
- "fmt"
- "net/http"
- "net/http/pprof"
-
- "github.com/go-chi/chi/v5"
- )
-
- // Profiler is a convenient subrouter used for mounting net/http/pprof. ie.
- //
- // func MyService() http.Handler {
- // r := chi.NewRouter()
- // // ..middlewares
- // r.Mount("/debug", middleware.Profiler())
- // // ..routes
- // return r
- // }
- func Profiler() http.Handler {
- r := chi.NewRouter()
- r.Use(NoCache)
-
- r.Get("/", func(w http.ResponseWriter, r *http.Request) {
- http.Redirect(w, r, r.RequestURI+"/pprof/", http.StatusMovedPermanently)
- })
- r.HandleFunc("/pprof", func(w http.ResponseWriter, r *http.Request) {
- http.Redirect(w, r, r.RequestURI+"/", http.StatusMovedPermanently)
- })
-
- r.HandleFunc("/pprof/*", pprof.Index)
- r.HandleFunc("/pprof/cmdline", pprof.Cmdline)
- r.HandleFunc("/pprof/profile", pprof.Profile)
- r.HandleFunc("/pprof/symbol", pprof.Symbol)
- r.HandleFunc("/pprof/trace", pprof.Trace)
- r.HandleFunc("/vars", expVars)
-
- r.Handle("/pprof/goroutine", pprof.Handler("goroutine"))
- r.Handle("/pprof/threadcreate", pprof.Handler("threadcreate"))
- r.Handle("/pprof/mutex", pprof.Handler("mutex"))
- r.Handle("/pprof/heap", pprof.Handler("heap"))
- r.Handle("/pprof/block", pprof.Handler("block"))
- r.Handle("/pprof/allocs", pprof.Handler("allocs"))
-
- return r
- }
-
- // Replicated from expvar.go as not public.
- func expVars(w http.ResponseWriter, r *http.Request) {
- first := true
- w.Header().Set("Content-Type", "application/json")
- fmt.Fprintf(w, "{\n")
- expvar.Do(func(kv expvar.KeyValue) {
- if !first {
- fmt.Fprintf(w, ",\n")
- }
- first = false
- fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
- })
- fmt.Fprintf(w, "\n}\n")
- }
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