*http.http2gzipReader vs io.ReadCloser Golang

Question

In the defination of the source code of response.go it is defined that the Body of type io.ReadCloser but while printing the type of Body by the following code it prints *http.http2gzipReader. Are they both same?

package main

import (
    "fmt"
    "net/http"
)

func main() {
    //any url
    url := "https://www.goal.com/en-in"
    res, _ := http.Get(url)
    body := res.Body
    fmt.Printf("tpye is %T", body)
}

"Are they both same?" No they are not, however `*http.http2gzipReader` implements `io.ReadCloser` and because of that it can be use as such. — mkopriva, Apr 06 '20 at 12:48
See https://tour.golang.org/methods/9 and https://golang.org/ref/spec#Interface_types for more info on interfaces. — mkopriva, Apr 06 '20 at 12:50
@mkopriva why the response.Body type is *http.http2gzipReader instead of io.ReadCloser? Can you share some resourses? — Abishek Bashyal, Apr 06 '20 at 13:33
It's declared as an interface type so that more than just one concrete implementation can be used. — mkopriva, Apr 06 '20 at 13:57

score 0 · Accepted Answer · answered Apr 06 '20 at 14:42

0

No, they are not same.

io.ReadCloser interface is the type of request body but the *http.http2gzipReader is the concrete type assigned to the interface. That's what we call, *http.http2gzipReader implements io.ReadCloser interface.

answered Apr 06 '20 at 14:42

Akshay Bharambe

76
5

*http.http2gzipReader vs io.ReadCloser Golang

1 Answers1