alertmanager/ui/web.go
TJ Hoplock f6b942cf9b
chore!: adopt log/slog, drop go-kit/log (#4089)
* chore!: adopt log/slog, drop go-kit/log

The bulk of this change set was automated by the following script which
is being used to aid in converting the various exporters/projects to use
slog:

https://gist.github.com/tjhop/49f96fb7ebbe55b12deee0b0312d8434

This commit includes several changes:
- bump exporter-tookit to v0.13.1 for log/slog support
- updates golangci-lint deprecated configs
- enables sloglint linter
- removes old go-kit/log linter configs
- introduce some `if logger == nil { $newLogger }` additions to prevent
  nil references
- converts cluster membership config to use a stdlib compatible slog
  adapter, rather than creating a custom io.Writer for use as the
membership `logOutput` config

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

* chore: address PR feedback

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

---------

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>
2024-11-06 09:09:57 +00:00

99 lines
2.9 KiB
Go

// Copyright 2015 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 ui
import (
"fmt"
"log/slog"
"net/http"
_ "net/http/pprof" // Comment this line to disable pprof endpoint.
"path"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/route"
"github.com/prometheus/alertmanager/asset"
)
// Register registers handlers to serve files for the web interface.
func Register(r *route.Router, reloadCh chan<- chan error, logger *slog.Logger) {
r.Get("/metrics", promhttp.Handler().ServeHTTP)
r.Get("/", func(w http.ResponseWriter, req *http.Request) {
disableCaching(w)
req.URL.Path = "/static/"
fs := http.FileServer(asset.Assets)
fs.ServeHTTP(w, req)
})
r.Get("/script.js", func(w http.ResponseWriter, req *http.Request) {
disableCaching(w)
req.URL.Path = "/static/script.js"
fs := http.FileServer(asset.Assets)
fs.ServeHTTP(w, req)
})
r.Get("/favicon.ico", func(w http.ResponseWriter, req *http.Request) {
disableCaching(w)
req.URL.Path = "/static/favicon.ico"
fs := http.FileServer(asset.Assets)
fs.ServeHTTP(w, req)
})
r.Get("/lib/*path", func(w http.ResponseWriter, req *http.Request) {
disableCaching(w)
req.URL.Path = path.Join("/static/lib", route.Param(req.Context(), "path"))
fs := http.FileServer(asset.Assets)
fs.ServeHTTP(w, req)
})
r.Post("/-/reload", func(w http.ResponseWriter, req *http.Request) {
errc := make(chan error)
defer close(errc)
reloadCh <- errc
if err := <-errc; err != nil {
http.Error(w, fmt.Sprintf("failed to reload config: %s", err), http.StatusInternalServerError)
}
})
r.Get("/-/healthy", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "OK")
})
r.Head("/-/healthy", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusOK)
})
r.Get("/-/ready", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "OK")
})
r.Head("/-/ready", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusOK)
})
r.Get("/debug/*subpath", http.DefaultServeMux.ServeHTTP)
r.Post("/debug/*subpath", http.DefaultServeMux.ServeHTTP)
}
func disableCaching(w http.ResponseWriter) {
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0") // Prevent proxies from caching.
}