How to read multiple times from same io.Reader

Question

I want to use request.Body(type io.ReadCloser) which is containing a image.

I dont want to use ioutil.ReadAll() as i want to write this bod

Answer 1

Technically, on one reader, you cannot read multiple times.

• Even if you create different references but
• when you read once it will be same object referred by all references.
• so what you can do is read the content and store it in one variable.
• Then use that variable as many times as you want.

This will print twice.

package main

import (
    "io/ioutil"
    "log"
    "strings"
)

func main() {
    r := strings.NewReader("some io.Reader stream to be read\n")
    stringData, _ := ioutil.ReadAll(r)
    log.Println(stringData)
    log.Println(stringData)
}