[#369] Add build tag for http logging

Build tag 'loghttp' for log_http.go. Created log_http_stub.go for default response without tag.

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

api/middleware/log_http.go

@@ -1,3 +1,5 @@
+//go:build loghttp
+
 package middleware
 
 import (
@@ -88,10 +90,9 @@ func LogHTTP(l *zap.Logger, config *LogHTTPConfig) Func {
 			httplog = withFieldIfExist(httplog, "query", r.URL.Query())
 			httplog = withFieldIfExist(httplog, "headers", r.Header)
 			if r.ContentLength > 0 && r.ContentLength <= config.MaxBody {
-				var err error
 				httplog, err = withBody(httplog, r)
 				if err != nil {
-					l.Error("read body error", zap.Error(err))
+					l.Warn(logs.FailedToGetRequestBody, zap.Error(err))
 				}
 			}
 			httplog.Info(logs.RequestHTTP)

api/middleware/log_http_stub.go

@@ -0,0 +1,31 @@
+//go:build !loghttp
+
+package middleware
+
+import (
+	"net/http"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"go.uber.org/zap"
+)
+
+type LogHTTPConfig struct {
+	Enabled    bool
+	MaxBody    int64
+	MaxLogSize int
+	OutputPath string
+	UseGzip    bool
+}
+
+func LogHTTP(l *zap.Logger, _ *LogHTTPConfig) Func {
+	l.Warn(logs.LogHTTPDisabledInThisBuild)
+	return func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			h.ServeHTTP(w, r)
+		})
+	}
+}
+
+func ReloadFileLogger(conf *LogHTTPConfig) error {
+	return nil
+}

cmd/s3-gw/app.go

@@ -220,7 +220,7 @@ func (s *appSettings) update(v *viper.Viper, log *zap.Logger) {
 	s.setRetryMaxAttempts(fetchRetryMaxAttempts(v))
 	s.setRetryMaxBackoff(fetchRetryMaxBackoff(v))
 	s.setRetryStrategy(fetchRetryStrategy(v))
-	s.updateHTTPLoggingSettings(v)
+	s.updateHTTPLoggingSettings(v, log)
 }
 
 func (s *appSettings) updateNamespacesSettings(v *viper.Viper, log *zap.Logger) {
@@ -564,7 +564,7 @@ func newMaxClients(cfg *viper.Viper) maxClientsConfig {
 	return config
 }
 
-func (s *appSettings) updateHTTPLoggingSettings(cfg *viper.Viper) {
+func (s *appSettings) updateHTTPLoggingSettings(cfg *viper.Viper, log *zap.Logger) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
@@ -573,6 +573,9 @@ func (s *appSettings) updateHTTPLoggingSettings(cfg *viper.Viper) {
 	s.httpLogging.MaxLogSize = cfg.GetInt(cfgHTTPLoggingMaxLogSize)
 	s.httpLogging.OutputPath = cfg.GetString(cfgHTTPLoggingDestination)
 	s.httpLogging.UseGzip = cfg.GetBool(cfgHTTPLoggingGzip)
+	if err := s3middleware.ReloadFileLogger(s.httpLogging); err != nil {
+		log.Error(logs.FailedToReloadHTTPFileLogger, zap.Error(err))
+	}
 }
 
 func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.Pool, *treepool.Pool, *keys.PrivateKey) {

internal/logs/logs.go

@@ -100,7 +100,9 @@ const (
 	FailedToPassAuthentication                           = "failed to pass authentication"                                                                     // Error in ../../api/middleware/auth.go
 	FailedToResolveCID                                   = "failed to resolve CID"                                                                             // Debug in ../../api/middleware/metrics.go
 	RequestStart                                         = "request start"                                                                                     // Info in ../../api/middleware/reqinfo.go
-	RequestHTTP                                          = "http request"
+	RequestHTTP                                          = "http request"                                                                                      // Info in ../../api/middleware/log_http.go
+	LogHTTPDisabledInThisBuild                           = "http logging disabled in this build"                                                               // Warn in ../../api/middleware/log_http_stub.go
+	FailedToGetRequestBody                               = "failed to get request body"                                                                        // Warn in ../../api/middleware/log_http_stub.go
 	FailedToUnescapeObjectName                           = "failed to unescape object name"                                                                    // Warn in ../../api/middleware/reqinfo.go
 	InvalidDefaultMaxAge                                 = "invalid defaultMaxAge"                                                                             // Fatal in ../../cmd/s3-gw/app_settings.go
 	CantShutDownService                                  = "can't shut down service"                                                                           // Panic in ../../cmd/s3-gw/service.go