🐛 fix: refactor OaiStreamHandler to improve last response handling and streamline response body closure

relay/channel/openai/relay-openai.go

@@ -111,12 +111,13 @@ func OaiStreamHandler(c *gin.Context, resp *http.Response, info *relaycommon.Rel
 		return service.OpenAIErrorWrapper(fmt.Errorf("invalid response"), "invalid_response", http.StatusInternalServerError), nil
 	}
 
-	containStreamUsage := false
+	defer common.CloseResponseBodyGracefully(resp)
+
+	model := info.UpstreamModelName
 	var responseId string
 	var createAt int64 = 0
 	var systemFingerprint string
-	model := info.UpstreamModelName
-
+	var containStreamUsage bool
 	var responseTextBuilder strings.Builder
 	var toolCount int
 	var usage = &dto.Usage{}
@@ -148,31 +149,15 @@ func OaiStreamHandler(c *gin.Context, resp *http.Response, info *relaycommon.Rel
 		return true
 	})
 
+	// 处理最后的响应
 	shouldSendLastResp := true
-	var lastStreamResponse dto.ChatCompletionsStreamResponse
-	err := common.DecodeJsonStr(lastStreamData, &lastStreamResponse)
-	if err == nil {
-		responseId = lastStreamResponse.Id
-		createAt = lastStreamResponse.Created
-		systemFingerprint = lastStreamResponse.GetSystemFingerprint()
-		model = lastStreamResponse.Model
-		if service.ValidUsage(lastStreamResponse.Usage) {
-			containStreamUsage = true
-			usage = lastStreamResponse.Usage
-			if !info.ShouldIncludeUsage {
-				shouldSendLastResp = false
-			}
-		}
-		for _, choice := range lastStreamResponse.Choices {
-			if choice.FinishReason != nil {
-				shouldSendLastResp = true
-			}
-		}
+	if err := handleLastResponse(lastStreamData, &responseId, &createAt, &systemFingerprint, &model, &usage,
+		&containStreamUsage, info, &shouldSendLastResp); err != nil {
+		common.SysError("error handling last response: " + err.Error())
 	}
 
-	if shouldSendLastResp {
-		sendStreamData(c, info, lastStreamData, forceFormat, thinkToContent)
-		//err = handleStreamFormat(c, info, lastStreamData, forceFormat, thinkToContent)
+	if shouldSendLastResp && info.RelayFormat == relaycommon.RelayFormatOpenAI {
+		_ = sendStreamData(c, info, lastStreamData, forceFormat, thinkToContent)
 	}
 
 	// 处理token计算
@@ -490,9 +475,9 @@ func OpenaiRealtimeHandler(c *gin.Context, info *relaycommon.RelayInfo) (*dto.Op
 						localUsage = &dto.RealtimeUsage{}
 						// print now usage
 					}
-					//common.LogInfo(c, fmt.Sprintf("realtime streaming sumUsage: %v", sumUsage))
-					//common.LogInfo(c, fmt.Sprintf("realtime streaming localUsage: %v", localUsage))
-					//common.LogInfo(c, fmt.Sprintf("realtime streaming localUsage: %v", localUsage))
+					common.LogInfo(c, fmt.Sprintf("realtime streaming sumUsage: %v", sumUsage))
+					common.LogInfo(c, fmt.Sprintf("realtime streaming localUsage: %v", localUsage))
+					common.LogInfo(c, fmt.Sprintf("realtime streaming localUsage: %v", localUsage))
 
 				} else if realtimeEvent.Type == dto.RealtimeEventTypeSessionUpdated || realtimeEvent.Type == dto.RealtimeEventTypeSessionCreated {
 					realtimeSession := realtimeEvent.Session