From 3f099d187c9d32ba18f3d8697442085186ef97e4 Mon Sep 17 00:00:00 2001
From: Bonny Lin <111042029+Bonny07@users.noreply.github.com>
Date: Sun, 31 May 2026 19:47:09 +0900
Subject: [PATCH] fix(service): return 500 instead of crashing on translation
 error (#224)

The /translate, /v1/translate and /v2/translate handlers called log.Fatalf when TranslateByDeepLX returned an error. log.Fatalf calls os.Exit, so a single failed translation would tear down the whole server process. Return a 500 JSON response and keep serving instead.
---
 service/service.go | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/service/service.go b/service/service.go
index 60a5062..e45b088 100644
--- a/service/service.go
+++ b/service/service.go
@@ -127,7 +127,11 @@ func Router(cfg *Config) *gin.Engine {
 
 		result, err := translate.TranslateByDeepLX(sourceLang, targetLang, translateText, tagHandling, proxyURL, "")
 		if err != nil {
-			log.Fatalf("Translation failed: %s", err)
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"code":    http.StatusInternalServerError,
+				"message": "Translation failed: " + err.Error(),
+			})
+			return
 		}
 
 		if result.Code == http.StatusOK {
@@ -191,7 +195,11 @@ func Router(cfg *Config) *gin.Engine {
 
 		result, err := translate.TranslateByDeepLX(sourceLang, targetLang, translateText, tagHandling, proxyURL, dlSession)
 		if err != nil {
-			log.Fatalf("Translation failed: %s", err)
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"code":    http.StatusInternalServerError,
+				"message": "Translation failed: " + err.Error(),
+			})
+			return
 		}
 
 		if result.Code == http.StatusOK {
@@ -243,7 +251,11 @@ func Router(cfg *Config) *gin.Engine {
 
 		result, err := translate.TranslateByDeepLX("", targetLang, translateText, "", proxyURL, "")
 		if err != nil {
-			log.Fatalf("Translation failed: %s", err)
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"code":    http.StatusInternalServerError,
+				"message": "Translation failed: " + err.Error(),
+			})
+			return
 		}
 
 		if result.Code == http.StatusOK {