use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/mholt/caddy/caddyhttp/pprof/pprof.go

@@ -0,0 +1,61 @@
+// Copyright 2015 Light Code Labs, LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pprof
+
+import (
+	"net/http"
+	pp "net/http/pprof"
+
+	"github.com/mholt/caddy/caddyhttp/httpserver"
+)
+
+// BasePath is the base path to match for all pprof requests.
+const BasePath = "/debug/pprof"
+
+// Handler is a simple struct whose ServeHTTP will delegate pprof
+// endpoints to their equivalent net/http/pprof handlers.
+type Handler struct {
+	Next httpserver.Handler
+	Mux  *http.ServeMux
+}
+
+// ServeHTTP handles requests to BasePath with pprof, or passes
+// all other requests up the chain.
+func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
+	if httpserver.Path(r.URL.Path).Matches(BasePath) {
+		h.Mux.ServeHTTP(w, r)
+		return 0, nil
+	}
+	return h.Next.ServeHTTP(w, r)
+}
+
+// NewMux returns a new http.ServeMux that routes pprof requests.
+// It pretty much copies what the std lib pprof does on init:
+// https://golang.org/src/net/http/pprof/pprof.go#L67
+func NewMux() *http.ServeMux {
+	mux := http.NewServeMux()
+	mux.HandleFunc(BasePath+"/", func(w http.ResponseWriter, r *http.Request) {
+		// this endpoint, as implemented in the standard library, doesn't set
+		// its Content-Type header, so using this can confuse clients, especially
+		// if gzipping...
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		pp.Index(w, r)
+	})
+	mux.HandleFunc(BasePath+"/cmdline", pp.Cmdline)
+	mux.HandleFunc(BasePath+"/profile", pp.Profile)
+	mux.HandleFunc(BasePath+"/symbol", pp.Symbol)
+	mux.HandleFunc(BasePath+"/trace", pp.Trace)
+	return mux
+}