add fasthttp pprof handler

pprof.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"net/http/pprof"
+	rtp "runtime/pprof"
+
+	"github.com/valyala/fasthttp"
+	"github.com/valyala/fasthttp/fasthttpadaptor"
+)
+
+func pprofHandler() fasthttp.RequestHandler {
+	items := rtp.Profiles()
+
+	profiles := map[string]fasthttp.RequestHandler{
+		"":        fasthttpadaptor.NewFastHTTPHandlerFunc(pprof.Index),
+		"cmdline": fasthttpadaptor.NewFastHTTPHandlerFunc(pprof.Cmdline),
+		"profile": fasthttpadaptor.NewFastHTTPHandlerFunc(pprof.Profile),
+		"symbol":  fasthttpadaptor.NewFastHTTPHandlerFunc(pprof.Symbol),
+		"trace":   fasthttpadaptor.NewFastHTTPHandlerFunc(pprof.Trace),
+	}
+
+	for i := range items {
+		name := items[i].Name()
+		profiles[name] = fasthttpadaptor.NewFastHTTPHandler(pprof.Handler(name))
+	}
+
+	return func(ctx *fasthttp.RequestCtx) {
+		name, _ := ctx.UserValue("name").(string)
+
+		if handler, ok := profiles[name]; ok {
+			handler(ctx)
+			return
+		}
+
+		ctx.Error("Not found", fasthttp.StatusNotFound)
+	}
+}