net/ghttp: MiddlewareHandlerResponse writes additional information

[wlynxg]

Go version

go version go1.20.6 linux/amd64

GoFrame version

v2.8.3

Can this bug be reproduced with the latest release?

Option Yes

What did you do?

package main

import (
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/net/ghttp"
)

func main() {
	s := g.Server()
	s.Use(ghttp.MiddlewareHandlerResponse)
	s.BindHandler("/", func(r *ghttp.Request) {
		r.Response.Writer.Write([]byte("hello world"))
	})
	s.SetPort(8081)
	s.Run()
}

What did you see happen?

response: hello world{"code":0,"message":"","data":null}

What did you expect to see?

Before 2.7.0, it was: hello world

[ninjashixuan]

没用过 2.7以前的版本， 应该是直接调用r.Response.Writer.Write 而不是 r.Response.Write（这个有 buffer） 意味着没有中间件的Bufferlen 方法判断哪里还可以往下走。

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I have never used versions before 2.7. You should call r.Response.Writer.Write directly instead of r.Response.Write (this one has buffer), which means there is no middleware Bufferlen method to determine where to go.