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