139 lines
4.3 KiB
Go
139 lines
4.3 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 (
|
|
"flag"
|
|
"fmt"
|
|
"html/template"
|
|
"net/http"
|
|
_ "net/http/pprof"
|
|
"strings"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/log"
|
|
|
|
"github.com/prometheus/alertmanager/web/api"
|
|
"github.com/prometheus/alertmanager/web/blob"
|
|
)
|
|
|
|
// Commandline flags.
|
|
var (
|
|
useLocalAssets = flag.Bool("web.use-local-assets", false, "Serve assets and templates from local files instead of from the binary.")
|
|
)
|
|
|
|
type WebService struct {
|
|
AlertManagerService *api.AlertManagerService
|
|
AlertsHandler *AlertsHandler
|
|
SilencesHandler *SilencesHandler
|
|
StatusHandler *StatusHandler
|
|
}
|
|
|
|
func (w WebService) ServeForever(addr string, pathPrefix string) error {
|
|
http.Handle(pathPrefix+"favicon.ico", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
http.Error(w, "", 404)
|
|
}))
|
|
|
|
http.HandleFunc("/", prometheus.InstrumentHandlerFunc("index", func(rw http.ResponseWriter, req *http.Request) {
|
|
// The "/" pattern matches everything, so we need to check
|
|
// that we're at the root here.
|
|
if req.URL.Path == pathPrefix {
|
|
w.AlertsHandler.ServeHTTP(rw, req)
|
|
} else if req.URL.Path == strings.TrimRight(pathPrefix, "/") {
|
|
http.Redirect(rw, req, pathPrefix, http.StatusFound)
|
|
} else if !strings.HasPrefix(req.URL.Path, pathPrefix) {
|
|
// We're running under a prefix but the user requested something
|
|
// outside of it. Let's see if this page exists under the prefix.
|
|
http.Redirect(rw, req, pathPrefix+strings.TrimLeft(req.URL.Path, "/"), http.StatusFound)
|
|
} else {
|
|
http.NotFound(rw, req)
|
|
}
|
|
}))
|
|
|
|
http.Handle(pathPrefix+"alerts", prometheus.InstrumentHandler("alerts", w.AlertsHandler))
|
|
http.Handle(pathPrefix+"silences", prometheus.InstrumentHandler("silences", w.SilencesHandler))
|
|
http.Handle(pathPrefix+"status", prometheus.InstrumentHandler("status", w.StatusHandler))
|
|
|
|
http.Handle(pathPrefix+"metrics", prometheus.Handler())
|
|
if *useLocalAssets {
|
|
http.Handle(pathPrefix+"static/", http.StripPrefix(pathPrefix+"static/", http.FileServer(http.Dir("web/static"))))
|
|
} else {
|
|
http.Handle(pathPrefix+"static/", http.StripPrefix(pathPrefix+"static/", new(blob.Handler)))
|
|
}
|
|
http.Handle(pathPrefix+"api/", w.AlertManagerService.Handler())
|
|
|
|
log.Info("listening on ", addr)
|
|
|
|
return http.ListenAndServe(addr, nil)
|
|
}
|
|
|
|
func getLocalTemplate(name string, pathPrefix string) (*template.Template, error) {
|
|
t := template.New("_base.html")
|
|
t.Funcs(webHelpers)
|
|
t.Funcs(template.FuncMap{"pathPrefix": func() string { return pathPrefix }})
|
|
|
|
return t.ParseFiles(
|
|
"web/templates/_base.html",
|
|
fmt.Sprintf("web/templates/%s.html", name),
|
|
)
|
|
}
|
|
|
|
func getEmbeddedTemplate(name string, pathPrefix string) (*template.Template, error) {
|
|
t := template.New("_base.html")
|
|
t.Funcs(webHelpers)
|
|
t.Funcs(template.FuncMap{"pathPrefix": func() string { return pathPrefix }})
|
|
|
|
file, err := blob.GetFile(blob.TemplateFiles, "_base.html")
|
|
if err != nil {
|
|
log.Error("Could not read base template: ", err)
|
|
return nil, err
|
|
}
|
|
t.Parse(string(file))
|
|
|
|
file, err = blob.GetFile(blob.TemplateFiles, name+".html")
|
|
if err != nil {
|
|
log.Errorf("Could not read %s template: %s", name, err)
|
|
return nil, err
|
|
}
|
|
t.Parse(string(file))
|
|
|
|
return t, nil
|
|
}
|
|
|
|
func getTemplate(name string, pathPrefix string) (t *template.Template, err error) {
|
|
if *useLocalAssets {
|
|
t, err = getLocalTemplate(name, pathPrefix)
|
|
} else {
|
|
t, err = getEmbeddedTemplate(name, pathPrefix)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return t, nil
|
|
}
|
|
|
|
func executeTemplate(w http.ResponseWriter, name string, data interface{}, pathPrefix string) {
|
|
tpl, err := getTemplate(name, pathPrefix)
|
|
if err != nil {
|
|
log.Error("Error preparing layout template: ", err)
|
|
return
|
|
}
|
|
err = tpl.Execute(w, data)
|
|
if err != nil {
|
|
log.Error("Error executing template: ", err)
|
|
}
|
|
}
|