Disable access log by default

Access logs aren't really useful during normal operation. Add a new flag
-v to enable the verbose logging mode, which is still useful during the
development.

Also remove the log_file config because it's no longer useful.

bloat.conf

@@ -31,9 +31,6 @@ static_directory=static
 # Empty value will disable the format selection in frontend.
 post_formats=PlainText:text/plain,HTML:text/html,Markdown:text/markdown,BBCode:text/bbcode
 
-# Log file. Will log to stdout if value is empty.
-# log_file=log
-
 # In single instance mode, bloat will not ask for instance domain name and
 # user will be directly redirected to login form. User login from other
 # instances is not allowed in this mode.

config/config.go

@@ -20,7 +20,6 @@ type config struct {
 	TemplatesPath   string
 	CustomCSS       string
 	PostFormats     []model.PostFormat
-	LogFile         string
 }
 
 func (c *config) IsValid() bool {
@@ -97,7 +96,7 @@ func Parse(r io.Reader) (c *config, err error) {
 			}
 			c.PostFormats = formats
 		case "log_file":
-			c.LogFile = val
+			// ignore
 		default:
 			return nil, errors.New("invalid config key " + key)
 		}

main.go

@@ -26,6 +26,7 @@ func errExit(err error) {
 
 func main() {
 	configFile := flag.String("f", "", "config file")
+	verbose := flag.Bool("v", false, "verbose mode")
 	flag.Parse()
 
 	if len(*configFile) > 0 {
@@ -52,25 +53,12 @@ func main() {
 		customCSS = "/static/" + customCSS
 	}
 
-	var logger *log.Logger
-	if len(config.LogFile) < 1 {
-		logger = log.New(os.Stdout, "", log.LstdFlags)
-	} else {
-		lf, err := os.OpenFile(config.LogFile,
-			os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
-		if err != nil {
-			errExit(err)
-		}
-		defer lf.Close()
-		logger = log.New(lf, "", log.LstdFlags)
-	}
-
 	s := service.NewService(config.ClientName, config.ClientScope,
 		config.ClientWebsite, customCSS, config.SingleInstance,
 		config.PostFormats, renderer)
-	handler := service.NewHandler(s, logger, config.StaticDirectory)
+	handler := service.NewHandler(s, *verbose, config.StaticDirectory)
 
-	logger.Println("listening on", config.ListenAddress)
+	log.Println("listening on", config.ListenAddress)
 	err = http.ListenAndServe(config.ListenAddress, handler)
 	if err != nil {
 		errExit(err)

service/transport.go

@@ -23,7 +23,7 @@ const (
 	CSRF
 )
 
-func NewHandler(s *service, logger *log.Logger, staticDir string) http.Handler {
+func NewHandler(s *service, verbose bool, staticDir string) http.Handler {
 	r := mux.NewRouter()
 
 	writeError := func(c *client, err error, t int, retry bool) {
@@ -48,10 +48,12 @@ func NewHandler(s *service, logger *log.Logger, staticDir string) http.Handler {
 				r:   req,
 			}
 
+			if verbose {
 				defer func(begin time.Time) {
-				logger.Printf("path=%s, err=%v, took=%v\n",
+					log.Printf("path=%s, err=%v, took=%v\n",
 						req.URL.Path, err, time.Since(begin))
 				}(time.Now())
+			}
 
 			var ct string
 			switch rt {