ResponseWriter.Write 会导致客户端收到错误的 HTTP 状态码

// server.go
http.HandleFunc("/", func (w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("Hello"))
    w.WriteHeader(http.StatusBadRequest)
})

$ curl -i http://127.0.0.1:8080
HTTP/1.1 200 OK
Date: Fri, 02 Dec 2022 13:11:53 GMT
Content-Length: 6
Content-Type: text/plain; charset=utf-8

Hello

2022/12/02 13:11:53 http: multiple response.WriteHeader calls

If WriteHeader is not called explicitly, the first call to Write will trigger an implicit WriteHeader(http.StatusOK).