feat(serverHandler/vhostHandler): set default value for input nil params

Author: marjune163

src/app/main.go

@@ -7,7 +7,6 @@ import (
 	"mjpclab.dev/ghfs/src/serverHandler"
 	"mjpclab.dev/ghfs/src/serverLog"
 	"mjpclab.dev/ghfs/src/setting"
-	"mjpclab.dev/ghfs/src/tpl/defaultTheme"
 	"mjpclab.dev/ghfs/src/tpl/theme"
 	"net/http"
 	"time"
@@ -77,14 +76,12 @@ func NewApp(params param.Params, settings *setting.Setting) (*App, []error) {
 		var themeInst theme.Theme
 		if len(p.ThemeDir) > 0 {
 			themeInst = theme.DirTheme(p.ThemeDir)
-		} else if len(p.Theme) == 0 {
-			themeInst = defaultTheme.DefaultTheme
-		} else {
+		} else if len(p.Theme) > 0 {
 			themeInst, errs = loadTheme(p.Theme, themePool)
-		}
-		if len(errs) > 0 {
-			logger.LogErrors(errs...)
-			return nil, errs
+			if len(errs) > 0 {
+				logger.LogErrors(errs...)
+				return nil, errs
+			}
 		}
 
 		// vHost Handler

src/serverHandler/vhostHandler.go

@@ -4,6 +4,7 @@ import (
 	"mjpclab.dev/ghfs/src/param"
 	"mjpclab.dev/ghfs/src/serverError"
 	"mjpclab.dev/ghfs/src/serverLog"
+	"mjpclab.dev/ghfs/src/tpl/defaultTheme"
 	"mjpclab.dev/ghfs/src/tpl/theme"
 	"mjpclab.dev/ghfs/src/user"
 	"net/http"
@@ -86,10 +87,18 @@ func NewVhostHandler(
 		return nil, errs
 	}
 
+	if logger == nil {
+		logger = &serverLog.Logger{}
+	}
+
+	if theme == nil {
+		theme = defaultTheme.DefaultTheme
+	}
+
 	// alias param
 	vhostCtx := &vhostContext{
-		theme:  theme,
 		logger: logger,
+		theme:  theme,
 
 		users:            users,
 		authUrlsUsers:    pathUsernamesToPathUids(users, p.AuthUrlsUsers),