Debug logging configuration.

* Accepts a -debug option which sets logging level to debug.

main.go

@@ -31,6 +31,7 @@ func main() {
 	maxPhotoXArg := flag.Int("max-photo-width", 0, "Maximum width of photos. 0 means no limit.")
 	maxPhotoYArg := flag.Int("max-photo-height", 0, "Maximum height of photos. 0 means no limit.")
 	photoQualityArg := flag.Int("photo-quality", 90, "Photo JPEG quality.")
+	debug := flag.Bool("debug", false, "If specified, logging level will be set to debug instead of info.")
 
 	flag.Parse()
 
@@ -66,6 +67,7 @@ func main() {
 		MaxPhotoX:    *maxPhotoXArg,
 		MaxPhotoY:    *maxPhotoYArg,
 		PhotoQuality: *photoQualityArg,
+		Debug:        *debug,
 	})
 
 	sigs := make(chan os.Signal, 1)

server/handling.go

@@ -35,7 +35,6 @@ func (s *Server) setupRouter() *gin.Engine {
 	router.Use(gin.Recovery())
 
 	// logging
-	ginLogger := logrus.New()
 	hostname, err := os.Hostname()
 	if err != nil {
 		hostname = "unknown"
@@ -54,7 +53,7 @@ func (s *Server) setupRouter() *gin.Engine {
 		if dataLength < 0 {
 			dataLength = 0
 		}
-		entry := ginLogger.WithFields(logrus.Fields{
+		entry := s.log.WithFields(logrus.Fields{
 			"hostname":   hostname,
 			"statusCode": statusCode,
 			"latency":    latency,

server/server.go

@@ -53,6 +53,7 @@ type ServerConfig struct {
 	MaxPhotoX     int
 	MaxPhotoY     int
 	PhotoQuality  int
+	Debug         bool
 }
 
 func New(config ServerConfig) *Server {
@@ -63,7 +64,9 @@ func New(config ServerConfig) *Server {
 
 func (s *Server) Run(ctx context.Context) {
 	s.log = logrus.New()
+	if s.config.Debug {
 		s.log.SetLevel(logrus.DebugLevel)
+	}
 
 	s.ctx = ctx
 	s.setupDB()