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requestBody.go
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requestBody.go
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package httpKit
import (
"bytes"
"github.com/richelieu-yang/chimera/v2/src/core/ioKit"
"io"
"net/http"
)
// MakeRequestBodySeekable
/*
PS: Gin不需要调用此方法.
PS:
(1) 一般与 proxy() 搭配使用.
(2) 某个路由涉及代理(请求转发)的话,需要在handler里面首先调用此方法.
*/
func MakeRequestBodySeekable(req *http.Request) error {
// 特殊情况: req.Body == http.NoBody,http客户端发的是post请求,但是没有request body(即没post参数)
if req.Body == nil || req.Body == http.NoBody {
return nil
}
if _, ok := req.Body.(io.Seeker); ok {
// 已经实现了 io.Seeker,避免重复调用
return nil
}
data, err := io.ReadAll(req.Body)
if err != nil {
return err
}
// bytes.NewReader() 的返回值实现了 io.Seeker 接口
reader := bytes.NewReader(data)
req.Body = ioKit.NopCloser(reader)
return nil
}
// ResetRequestBody 重置请求体,以防: 已经读完body了,请求转发给别人,别人收到的请求没内容.
/*
PS: req.Body可以为nil.
*/
func ResetRequestBody(req *http.Request) (bool, error) {
if req.Body == nil || req.Body == http.NoBody {
return true, nil
}
seeker, ok := req.Body.(io.Seeker)
if ok {
_, err := seeker.Seek(0, io.SeekStart)
if err != nil {
return false, err
}
return true, nil
}
return false, nil
}