diff --git a/middleware/distributor.go b/middleware/distributor.go
index 35cb6df..e922662 100644
--- a/middleware/distributor.go
+++ b/middleware/distributor.go
@@ -24,6 +24,9 @@ func Distribute() func(c *gin.Context) {
 		userId := c.GetInt("id")
 		var channel *model.Channel
 		channelId, ok := c.Get("specific_channel_id")
+		modelRequest, shouldSelectChannel, err := getModelRequest(c)
+		userGroup, _ := model.CacheGetUserGroup(userId)
+		c.Set("group", userGroup)
 		if ok {
 			id, err := strconv.Atoi(channelId.(string))
 			if err != nil {
@@ -40,72 +43,7 @@ func Distribute() func(c *gin.Context) {
 				return
 			}
 		} else {
-			shouldSelectChannel := true
 			// Select a channel for the user
-			var modelRequest ModelRequest
-			var err error
-			if strings.Contains(c.Request.URL.Path, "/mj/") {
-				relayMode := relayconstant.Path2RelayModeMidjourney(c.Request.URL.Path)
-				if relayMode == relayconstant.RelayModeMidjourneyTaskFetch ||
-					relayMode == relayconstant.RelayModeMidjourneyTaskFetchByCondition ||
-					relayMode == relayconstant.RelayModeMidjourneyNotify ||
-					relayMode == relayconstant.RelayModeMidjourneyTaskImageSeed {
-					shouldSelectChannel = false
-				} else {
-					midjourneyRequest := dto.MidjourneyRequest{}
-					err = common.UnmarshalBodyReusable(c, &midjourneyRequest)
-					if err != nil {
-						abortWithMidjourneyMessage(c, http.StatusBadRequest, constant.MjErrorUnknown, "无效的请求, "+err.Error())
-						return
-					}
-					midjourneyModel, mjErr, success := service.GetMjRequestModel(relayMode, &midjourneyRequest)
-					if mjErr != nil {
-						abortWithMidjourneyMessage(c, http.StatusBadRequest, mjErr.Code, mjErr.Description)
-						return
-					}
-					if midjourneyModel == "" {
-						if !success {
-							abortWithMidjourneyMessage(c, http.StatusBadRequest, constant.MjErrorUnknown, "无效的请求, 无法解析模型")
-							return
-						} else {
-							// task fetch, task fetch by condition, notify
-							shouldSelectChannel = false
-						}
-					}
-					modelRequest.Model = midjourneyModel
-				}
-				c.Set("relay_mode", relayMode)
-			} else if !strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") {
-				err = common.UnmarshalBodyReusable(c, &modelRequest)
-			}
-			if err != nil {
-				abortWithOpenAiMessage(c, http.StatusBadRequest, "无效的请求, "+err.Error())
-				return
-			}
-			if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
-				if modelRequest.Model == "" {
-					modelRequest.Model = "text-moderation-stable"
-				}
-			}
-			if strings.HasSuffix(c.Request.URL.Path, "embeddings") {
-				if modelRequest.Model == "" {
-					modelRequest.Model = c.Param("model")
-				}
-			}
-			if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
-				if modelRequest.Model == "" {
-					modelRequest.Model = "dall-e"
-				}
-			}
-			if strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
-				if modelRequest.Model == "" {
-					if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/speech") {
-						modelRequest.Model = "tts-1"
-					} else {
-						modelRequest.Model = "whisper-1"
-					}
-				}
-			}
 			// check token model mapping
 			modelLimitEnable := c.GetBool("token_model_limit_enabled")
 			if modelLimitEnable {
@@ -128,8 +66,6 @@ func Distribute() func(c *gin.Context) {
 				}
 			}
 
-			userGroup, _ := model.CacheGetUserGroup(userId)
-			c.Set("group", userGroup)
 			if shouldSelectChannel {
 				channel, err = model.CacheGetRandomSatisfiedChannel(userGroup, modelRequest.Model, 0)
 				if err != nil {
@@ -147,13 +83,82 @@ func Distribute() func(c *gin.Context) {
 					abortWithOpenAiMessage(c, http.StatusServiceUnavailable, fmt.Sprintf("当前分组 %s 下对于模型 %s 无可用渠道（数据库一致性已被破坏）", userGroup, modelRequest.Model))
 					return
 				}
-				SetupContextForSelectedChannel(c, channel, modelRequest.Model)
 			}
 		}
+		SetupContextForSelectedChannel(c, channel, modelRequest.Model)
 		c.Next()
 	}
 }
 
+func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
+	var modelRequest ModelRequest
+	shouldSelectChannel := true
+	var err error
+	if strings.Contains(c.Request.URL.Path, "/mj/") {
+		relayMode := relayconstant.Path2RelayModeMidjourney(c.Request.URL.Path)
+		if relayMode == relayconstant.RelayModeMidjourneyTaskFetch ||
+			relayMode == relayconstant.RelayModeMidjourneyTaskFetchByCondition ||
+			relayMode == relayconstant.RelayModeMidjourneyNotify ||
+			relayMode == relayconstant.RelayModeMidjourneyTaskImageSeed {
+			shouldSelectChannel = false
+		} else {
+			midjourneyRequest := dto.MidjourneyRequest{}
+			err = common.UnmarshalBodyReusable(c, &midjourneyRequest)
+			if err != nil {
+				abortWithMidjourneyMessage(c, http.StatusBadRequest, constant.MjErrorUnknown, "无效的请求, "+err.Error())
+				return nil, false, err
+			}
+			midjourneyModel, mjErr, success := service.GetMjRequestModel(relayMode, &midjourneyRequest)
+			if mjErr != nil {
+				abortWithMidjourneyMessage(c, http.StatusBadRequest, mjErr.Code, mjErr.Description)
+				return nil, false, fmt.Errorf(mjErr.Description)
+			}
+			if midjourneyModel == "" {
+				if !success {
+					abortWithMidjourneyMessage(c, http.StatusBadRequest, constant.MjErrorUnknown, "无效的请求, 无法解析模型")
+					return nil, false, fmt.Errorf("无效的请求, 无法解析模型")
+				} else {
+					// task fetch, task fetch by condition, notify
+					shouldSelectChannel = false
+				}
+			}
+			modelRequest.Model = midjourneyModel
+		}
+		c.Set("relay_mode", relayMode)
+	} else if !strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") {
+		err = common.UnmarshalBodyReusable(c, &modelRequest)
+	}
+	if err != nil {
+		abortWithOpenAiMessage(c, http.StatusBadRequest, "无效的请求, "+err.Error())
+		return nil, false, err
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
+		if modelRequest.Model == "" {
+			modelRequest.Model = "text-moderation-stable"
+		}
+	}
+	if strings.HasSuffix(c.Request.URL.Path, "embeddings") {
+		if modelRequest.Model == "" {
+			modelRequest.Model = c.Param("model")
+		}
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
+		if modelRequest.Model == "" {
+			modelRequest.Model = "dall-e"
+		}
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
+		if modelRequest.Model == "" {
+			if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/speech") {
+				modelRequest.Model = "tts-1"
+			} else {
+				modelRequest.Model = "whisper-1"
+			}
+		}
+	}
+	return &modelRequest, shouldSelectChannel, nil
+}
+
 func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, modelName string) {
 	c.Set("channel", channel.Type)
 	c.Set("channel_id", channel.Id)