refactor: add set event stream headers func (#402)

封装流式传输响应头的设置

controller/relay-utils.go

@@ -2,6 +2,7 @@ package controller
 
 import (
 	"fmt"
+	"github.com/gin-gonic/gin"
 	"github.com/pkoukk/tiktoken-go"
 	"one-api/common"
 )
@@ -106,3 +107,11 @@ func shouldDisableChannel(err *OpenAIError) bool {
 	}
 	return false
 }
+
+func setEventStreamHeaders(c *gin.Context) {
+	c.Writer.Header().Set("Content-Type", "text/event-stream")
+	c.Writer.Header().Set("Cache-Control", "no-cache")
+	c.Writer.Header().Set("Connection", "keep-alive")
+	c.Writer.Header().Set("Transfer-Encoding", "chunked")
+	c.Writer.Header().Set("X-Accel-Buffering", "no")
+}