mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-20 07:47:31 -07:00
a73f061d3c
An design question was open for me in the beginning was whether to serialize other types to disk, but Protocol Buffers quickly won out, which allows us to drop support for other types. This is a good start to cleaning up a lot of cruft in the storage stack and can let us eventually decouple the various moving parts into separate subsystems for easier reasoning. This commit is not strictly required, but it is a start to making the rest a lot more enjoyable to interact with.
135 lines
3.9 KiB
Go
135 lines
3.9 KiB
Go
// Copyright 2013 Prometheus Team
|
|
// 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 web
|
|
|
|
import (
|
|
"code.google.com/p/gorest"
|
|
"flag"
|
|
"fmt"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/client_golang/prometheus/exp"
|
|
"github.com/prometheus/prometheus/web/api"
|
|
"github.com/prometheus/prometheus/web/blob"
|
|
"html/template"
|
|
"log"
|
|
"net/http"
|
|
"net/http/pprof"
|
|
)
|
|
|
|
// Commandline flags.
|
|
var (
|
|
listenAddress = flag.String("listenAddress", ":9090", "Address to listen on for web interface.")
|
|
useLocalAssets = flag.Bool("useLocalAssets", false, "Read assets/templates from file instead of binary.")
|
|
userAssetsPath = flag.String("userAssets", "", "Path to static asset directory, available at /user")
|
|
)
|
|
|
|
type WebService struct {
|
|
StatusHandler *StatusHandler
|
|
DatabasesHandler *DatabasesHandler
|
|
MetricsHandler *api.MetricsService
|
|
}
|
|
|
|
func (w WebService) ServeForever() error {
|
|
gorest.RegisterService(w.MetricsHandler)
|
|
|
|
exp.Handle("/favicon.ico", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
http.Error(w, "", 404)
|
|
}))
|
|
|
|
// TODO(julius): This will need to be rewritten once the exp package provides
|
|
// the coarse mux behaviors via a wrapper function.
|
|
exp.Handle("/debug/pprof/", http.HandlerFunc(pprof.Index))
|
|
exp.Handle("/debug/pprof/cmdline", http.HandlerFunc(pprof.Cmdline))
|
|
exp.Handle("/debug/pprof/profile", http.HandlerFunc(pprof.Profile))
|
|
exp.Handle("/debug/pprof/symbol", http.HandlerFunc(pprof.Symbol))
|
|
|
|
exp.Handle("/", w.StatusHandler)
|
|
exp.Handle("/databases", w.DatabasesHandler)
|
|
exp.HandleFunc("/graph", graphHandler)
|
|
|
|
exp.Handle("/api/", gorest.Handle())
|
|
exp.Handle("/metrics.json", prometheus.DefaultHandler)
|
|
if *useLocalAssets {
|
|
exp.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("web/static"))))
|
|
} else {
|
|
exp.Handle("/static/", http.StripPrefix("/static/", new(blob.Handler)))
|
|
}
|
|
|
|
if *userAssetsPath != "" {
|
|
exp.Handle("/user/", http.StripPrefix("/user/", http.FileServer(http.Dir(*userAssetsPath))))
|
|
}
|
|
|
|
log.Printf("listening on %s", *listenAddress)
|
|
|
|
return http.ListenAndServe(*listenAddress, exp.DefaultCoarseMux)
|
|
}
|
|
|
|
func getLocalTemplate(name string) (*template.Template, error) {
|
|
return template.ParseFiles(
|
|
"web/templates/_base.html",
|
|
fmt.Sprintf("web/templates/%s.html", name),
|
|
)
|
|
}
|
|
|
|
func getEmbeddedTemplate(name string) (*template.Template, error) {
|
|
t := template.New("_base")
|
|
|
|
file, err := blob.GetFile(blob.TemplateFiles, "_base.html")
|
|
if err != nil {
|
|
log.Printf("Could not read base template: %s", err)
|
|
return nil, err
|
|
}
|
|
t.Parse(string(file))
|
|
|
|
file, err = blob.GetFile(blob.TemplateFiles, name+".html")
|
|
if err != nil {
|
|
log.Printf("Could not read %s template: %s", name, err)
|
|
return nil, err
|
|
}
|
|
t.Parse(string(file))
|
|
|
|
return t, nil
|
|
}
|
|
|
|
func getTemplate(name string) (t *template.Template, err error) {
|
|
if *useLocalAssets {
|
|
t, err = getLocalTemplate(name)
|
|
} else {
|
|
t, err = getEmbeddedTemplate(name)
|
|
}
|
|
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if *userAssetsPath != "" {
|
|
// replace "user_dashboard_link" template
|
|
t.Parse(`{{define "user_dashboard_link"}}<a href="/user">User Dashboard{{end}}`)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func executeTemplate(w http.ResponseWriter, name string, data interface{}) {
|
|
tpl, err := getTemplate(name)
|
|
if err != nil {
|
|
log.Printf("Error preparing layout template: %s", err)
|
|
return
|
|
}
|
|
err = tpl.Execute(w, data)
|
|
if err != nil {
|
|
log.Printf("Error executing template: %s", err)
|
|
}
|
|
}
|