76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package webserver
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
"time"
|
|
|
|
"git.dev.m-and-m.ovh/mderasse/gocommon/commonctx"
|
|
)
|
|
|
|
const defaultTimeout = 90 * time.Second
|
|
const defaultShutdownTimeout = 10 * time.Second
|
|
|
|
type cleanupFunc func() error
|
|
|
|
// ExecuteServerParams are the parameters expected in the ExecuteServer function.
|
|
type ExecuteServerParams struct {
|
|
Cleanup cleanupFunc
|
|
ShutdownTimeout *time.Duration
|
|
}
|
|
|
|
// ExecuteServer will launche a http.Server and handle the "exit" signals and gracefully stop the server
|
|
// and call the cleanup function.
|
|
func ExecuteServer(ctx context.Context, srv *http.Server, params *ExecuteServerParams) error {
|
|
|
|
log := commonctx.GetLogger(ctx)
|
|
|
|
if srv == nil {
|
|
return fmt.Errorf("missing http.server params")
|
|
}
|
|
|
|
if srv.ReadTimeout == 0 {
|
|
srv.ReadTimeout = defaultTimeout
|
|
}
|
|
|
|
if srv.WriteTimeout == 0 {
|
|
srv.WriteTimeout = defaultTimeout
|
|
}
|
|
|
|
log.Infof("launching webserver on %s", srv.Addr)
|
|
|
|
go func() {
|
|
if err := srv.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
|
|
log.WithError(err).Fatalf("HTTP server error: %v", err)
|
|
}
|
|
log.Info("Stopped serving new connections.")
|
|
}()
|
|
|
|
sigChan := make(chan os.Signal, 1)
|
|
signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
|
|
<-sigChan
|
|
|
|
shutdownCtx, shutdownRelease := context.WithTimeout(ctx, defaultShutdownTimeout)
|
|
defer shutdownRelease()
|
|
|
|
if err := srv.Shutdown(shutdownCtx); err != nil {
|
|
log.WithError(err).Warnf("HTTP shutdown error: %v", err)
|
|
}
|
|
|
|
if params.Cleanup != nil {
|
|
if err := params.Cleanup(); err != nil {
|
|
log.WithError(err).Warnf("Impossible to cleanup correctly after shutdown. error : %v", err)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
log.Info("Graceful shutdown complete.")
|
|
|
|
return nil
|
|
}
|