mirror of
https://github.com/Luzifer/nginx-sso.git
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71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
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// Copyright 2017, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Package zpages implements a collection of HTML pages that display RPC stats
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// and trace data, and also functions to write that same data in plain text to
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// an io.Writer.
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//
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// Users can also embed the HTML for stats and traces in custom status pages.
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//
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// zpages are currrently work-in-process and cannot display minutely and
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// hourly stats correctly.
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//
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// Performance
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//
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// Installing the zpages has a performance overhead because additional traces
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// and stats will be collected in-process. In most cases, we expect this
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// overhead will not be significant but it depends on many factors, including
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// how many spans your process creates and how richly annotated they are.
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package zpages // import "go.opencensus.io/zpages"
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import (
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"net/http"
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"path"
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"sync"
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"go.opencensus.io/internal"
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)
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// TODO(ramonza): Remove Handler to make initialization lazy.
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// Handler is deprecated: Use Handle.
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var Handler http.Handler
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func init() {
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mux := http.NewServeMux()
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Handle(mux, "/")
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Handler = mux
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}
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// Handle adds the z-pages to the given ServeMux rooted at pathPrefix.
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func Handle(mux *http.ServeMux, pathPrefix string) {
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enable()
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if mux == nil {
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mux = http.DefaultServeMux
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}
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mux.HandleFunc(path.Join(pathPrefix, "rpcz"), rpczHandler)
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mux.HandleFunc(path.Join(pathPrefix, "tracez"), tracezHandler)
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mux.Handle(path.Join(pathPrefix, "public/"), http.FileServer(fs))
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}
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var enableOnce sync.Once
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func enable() {
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enableOnce.Do(func() {
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internal.LocalSpanStoreEnabled = true
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registerRPCViews()
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})
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}
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