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main.go
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main.go
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/*
* Copyright 2018 National Library of Norway.
*
* 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 main
import (
"net/http"
"os"
"github.com/nlnwa/veidemann-ooshandler/ooshandler"
"github.com/prometheus/client_golang/prometheus/promhttp"
"golang.org/x/exp/slog"
)
const indexContent = `<html>
<head><title>Veidemann Out of Scope Handler</title></head>
<body>
<h1>Veidemann Out of Scope Handler</h1>
<p><a href='` + "/metrics" + `'>Metrics</a></p>
</body>
</html>
`
func main() {
config := NewConfig()
slog.Info("Starting Out of Scope Handler", "config", config)
// Create OOSHandler
err := os.MkdirAll(config.DataDir, 0777)
if err != nil {
slog.Error("Unable to create data directory", "err", err)
os.Exit(1)
}
oosHandler := ooshandler.NewOosHandler(config.DataDir)
// Start GRPC server
oos := NewOosService(config.ListenPort, oosHandler)
err = oos.Start()
if err != nil {
slog.Error("Unable to start GRPC service", "err", err)
os.Exit(1)
}
// Serve metrics
http.Handle(config.MetricsPath, promhttp.Handler())
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
_, err = w.Write([]byte(indexContent))
if err != nil {
slog.Error("Error writing index content", "err", err)
}
})
err = http.ListenAndServe(config.MetricsAddress, nil)
if err != nil {
slog.Error("Unable to start metrics server", "err", err)
os.Exit(1)
}
}