fix: stream options

constant/env.go

@@ -8,4 +8,4 @@ var StreamingTimeout = common.GetEnvOrDefault("STREAMING_TIMEOUT", 30)
 var DifyDebug = common.GetEnvOrDefaultBool("DIFY_DEBUG", true)
 
 // ForceStreamOption 覆盖请求参数，强制返回usage信息
-var ForceStreamOption = common.GetEnvOrDefaultBool("FORCE_STREAM_OPTION", false)
+var ForceStreamOption = common.GetEnvOrDefaultBool("FORCE_STREAM_OPTION", true)

service/usage_helpr.go

@@ -32,7 +32,7 @@ func GenerateFinalUsageResponse(id string, createAt int64, model string, usage d
 		Created:           createAt,
 		Model:             model,
 		SystemFingerprint: nil,
-		Choices:           nil,
+		Choices:           make([]dto.ChatCompletionsStreamResponseChoice, 0),
 		Usage:             &usage,
 	}
 }