README.md

@@ -104,8 +104,8 @@ func NewMux(ctx context.Context, shutdown context.CancelFunc, db *database.DataB
 func New(ctx context.Context, shutdown context.CancelFunc, db *database.DataBase) (*http.Server, error) {
     mux := NewMux(ctx, shutdown, db)
     srv := &http.Server{
-    Addr:   consts.Config.Host + ":" + consts.Config.Port,
-            Handler: mux,
+        Addr:    consts.Config.Host + ":" + consts.Config.Port,
+        Handler: mux,
     }
     go func() {
         fmt.Printf("Web server: http://%s:%s/\n", consts.Config.Host, consts.Config.Port)

utils/http/logger/logger.go

@@ -49,7 +49,13 @@ func LogInfo(format string, a ...any) {
 }
 
 func LogInternalError(err error) {
-	log.Printf("%s\n", err.Error())
+	msg := fmt.Sprintf("%s\n", err.Error())
+	log.Printf("%s", msg)
+	if ErrorLogFile != "" {
+		if err := appendToLogFile(ErrorLogFile, time.Now().Format("2006/01/02 15:04:05")+" "+msg); err != nil {
+			log.Printf("%s\n", err.Error())
+		}
+	}
 	if RollBarEnabled && !RollBarSkipErrors.contain(err.Error()) {
 		rollbar.Error(err)
 	}

utils/http/logger/logger_test.go

@@ -6,6 +6,8 @@ import (
 	"log"
 	"net/http"
 	"net/http/httptest"
+	"os"
+	"strings"
 	"testing"
 
 	. "github.com/onsi/ginkgo"
@@ -14,6 +16,32 @@ import (
 )
 
 var _ = Describe("logger", func() {
+	Context("LogInternalError", func() {
+		original := logger.ErrorLogFile
+		logger.ErrorLogFile = "/tmp/test-err-out.log"
+
+		f, err := os.OpenFile(logger.ErrorLogFile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+		Expect(err).To(Succeed())
+		_, err = fmt.Fprint(f, "")
+		Expect(err).To(Succeed())
+		Expect(f.Close()).To(Succeed())
+
+		logger.LogInternalError(fmt.Errorf("MyError 1"))
+		file, err := os.ReadFile(logger.ErrorLogFile)
+		Expect(err).To(Succeed())
+		content := string(file)
+		Expect(strings.HasSuffix(content, "MyError 1\n")).To(Equal(true))
+
+		logger.LogInternalError(fmt.Errorf("MyError 2"))
+		file, err = os.ReadFile(logger.ErrorLogFile)
+		Expect(err).To(Succeed())
+		content = string(file)
+		Expect(strings.HasSuffix(content, "MyError 2\n")).To(Equal(true))
+
+		// Restore original value
+		logger.ErrorLogFile = original
+	})
+
 	Context("LogRequests", func() {
 		var srv *httptest.Server
 		var client *http.Client