golang socket.io 跨域报错

蛋疼的socket.io,golang写的socket.io发布器已经胜利在望了,然后chrome,firefox下用websocket协议连接都可以..但偏偏用ie测试 (socket.io应该起的是polling) 就出现跨域报错.
大神啊..救救我啊

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还是自己找到了答案了
贴下自己的代码吧:

http.HandleFunc("/socket.io/", func(w http.ResponseWriter, r *http.Request) {
    origin := r.Header.Get("Origin")
    log.Println("origin",origin)
    w.Header().Set("Access-Control-Allow-Origin", origin)
    w.Header().Set("Access-Control-Allow-Credentials", "true")
    
    server.ServeHTTP(w, r)
})