93 lines
2.8 KiB
Go
93 lines
2.8 KiB
Go
// Copyright 2015 Prometheus Team
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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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package ui
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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_ "net/http/pprof" // Comment this line to disable pprof endpoint.
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"path/filepath"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/route"
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)
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func serveAsset(w http.ResponseWriter, req *http.Request, fp string, logger log.Logger) {
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info, err := AssetInfo(fp)
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if err != nil {
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level.Warn(logger).Log("msg", "Could not get file", "err", err)
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w.WriteHeader(http.StatusNotFound)
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return
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}
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file, err := Asset(fp)
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if err != nil {
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if err != io.EOF {
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level.Warn(logger).Log("msg", "Could not get file", "file", fp, "err", err)
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}
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w.WriteHeader(http.StatusNotFound)
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return
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}
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w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
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http.ServeContent(w, req, info.Name(), info.ModTime(), bytes.NewReader(file))
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}
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// Register registers handlers to serve files for the web interface.
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func Register(r *route.Router, reloadCh chan<- chan error, logger log.Logger) {
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ihf := prometheus.InstrumentHandlerFunc
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r.Get("/metrics", prometheus.Handler().ServeHTTP)
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r.Get("/", ihf("index", func(w http.ResponseWriter, req *http.Request) {
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serveAsset(w, req, "ui/app/index.html", logger)
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}))
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r.Get("/script.js", ihf("app", func(w http.ResponseWriter, req *http.Request) {
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serveAsset(w, req, "ui/app/script.js", logger)
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}))
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r.Get("/favicon.ico", ihf("app", func(w http.ResponseWriter, req *http.Request) {
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serveAsset(w, req, "ui/app/favicon.ico", logger)
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}))
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r.Get("/lib/*filepath", ihf("lib_files",
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func(w http.ResponseWriter, req *http.Request) {
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fp := route.Param(req.Context(), "filepath")
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serveAsset(w, req, filepath.Join("ui/app/lib", fp), logger)
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},
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))
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r.Post("/-/reload", func(w http.ResponseWriter, req *http.Request) {
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errc := make(chan error)
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defer close(errc)
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reloadCh <- errc
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if err := <-errc; err != nil {
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http.Error(w, fmt.Sprintf("failed to reload config: %s", err), http.StatusInternalServerError)
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}
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})
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r.Get("/-/healthy", func(w http.ResponseWriter, _ *http.Request) {
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w.WriteHeader(http.StatusOK)
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fmt.Fprintf(w, "OK")
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})
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r.Get("/debug/*subpath", http.DefaultServeMux.ServeHTTP)
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r.Post("/debug/*subpath", http.DefaultServeMux.ServeHTTP)
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}
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