windows_exporter/internal/httphandler/version.go

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// Copyright 2024 The Prometheus Authors
// 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.
//go:build windows
2024-09-10 22:34:10 +00:00
package httphandler
import (
"encoding/json"
"fmt"
"net/http"
"github.com/prometheus/common/version"
)
type VersionHandler struct{}
// Same struct prometheus uses for their /version endpoint.
// Separate copy to avoid pulling all of prometheus as a dependency.
type prometheusVersion struct {
Version string `json:"version"`
Revision string `json:"revision"`
Branch string `json:"branch"`
BuildUser string `json:"buildUser"`
BuildDate string `json:"buildDate"`
GoVersion string `json:"goVersion"`
}
// Interface guard.
var _ http.Handler = (*VersionHandler)(nil)
func NewVersionHandler() VersionHandler {
return VersionHandler{}
}
func (h VersionHandler) ServeHTTP(w http.ResponseWriter, _ *http.Request) {
// we can't use "version" directly as it is a package, and not an object that
// can be serialized.
err := json.NewEncoder(w).Encode(prometheusVersion{
Version: version.Version,
Revision: version.Revision,
Branch: version.Branch,
BuildUser: version.BuildUser,
BuildDate: version.BuildDate,
GoVersion: version.GoVersion,
})
if err != nil {
http.Error(w, fmt.Sprintf("error encoding JSON: %s", err), http.StatusInternalServerError)
}
}