frostfs-node/lib/fix/web/http.go

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package web
import (
"context"
"net/http"
"sync/atomic"
"time"
"github.com/spf13/viper"
"go.uber.org/zap"
)
type (
httpParams struct {
Key string
Viper *viper.Viper
Logger *zap.Logger
Handler http.Handler
}
httpServer struct {
name string
started *int32
logger *zap.Logger
shutdownTTL time.Duration
server server
}
)
func (h *httpServer) Start(ctx context.Context) {
if h == nil {
return
}
if !atomic.CompareAndSwapInt32(h.started, 0, 1) {
h.logger.Info("http: already started",
zap.String("server", h.name))
return
}
go func() {
if err := h.server.serve(ctx); err != nil {
if err != http.ErrServerClosed {
h.logger.Error("http: could not start server",
zap.Error(err))
}
}
}()
}
func (h *httpServer) Stop() {
if h == nil {
return
}
if !atomic.CompareAndSwapInt32(h.started, 1, 0) {
h.logger.Info("http: already stopped",
zap.String("server", h.name))
return
}
ctx, cancel := context.WithTimeout(context.Background(), h.shutdownTTL)
defer cancel()
h.logger.Debug("http: try to stop server",
zap.String("server", h.name))
if err := h.server.shutdown(ctx); err != nil {
h.logger.Error("http: could not stop server",
zap.Error(err))
}
}
const defaultShutdownTTL = 30 * time.Second
func newHTTPServer(p httpParams) *httpServer {
var (
address string
shutdown time.Duration
)
if address = p.Viper.GetString(p.Key + ".address"); address == "" {
p.Logger.Info("Empty bind address, skip",
zap.String("server", p.Key))
return nil
}
if p.Handler == nil {
p.Logger.Info("Empty handler, skip",
zap.String("server", p.Key))
return nil
}
p.Logger.Info("Create http.Server",
zap.String("server", p.Key),
zap.String("address", address))
if shutdown = p.Viper.GetDuration(p.Key + ".shutdown_ttl"); shutdown <= 0 {
shutdown = defaultShutdownTTL
}
return &httpServer{
name: p.Key,
started: new(int32),
logger: p.Logger,
shutdownTTL: shutdown,
server: newServer(params{
Address: address,
Name: p.Key,
Config: p.Viper,
Logger: p.Logger,
Handler: p.Handler,
}),
}
}