http包的Respose,不全部读取就不能关闭吗?

[Wendal Chen]

golang 1.0.3

平台: windows, opensuse 11.4, F14, 均可重现

演示访问openSUSE的iso镜像,但不读取Body的数据

package main

import (

"fmt"

"net/http"

)

func main() {

resp, err := http.Get("http://mirrors.ustc.edu.cn/opensuse/distribution/12.3/iso/openSUSE-12.3-GNOME-Live-i686.iso")

if err != nil {

panic(err)

}

fmt.Println("Resp code", resp.StatusCode)

        // 只读取少量或根本就不读取,然后关闭Body

resp.Body.Close() // 卡住, 即使断网也不继续运行了

}

不完全读取数据之前,不可关闭??

注: 与HEAD的场景无关.

--
Wendal Chen
GuangDong China

[David DENG]

Use English to post your questions, please.

David

[Wendal Chen]

So sorry, I send it in Chinese.

///////////////////////////////////////////////////////////////////////

golang 1.0.3

windows 7

opensuse 11.4

///////////////////////////////////////////////////////////////////////

package main

import (

"fmt"

"net/http"

)

func main() {

resp, err := http.Get("http://mirrors.ustc.edu.cn/opensuse/distribution/12.3/iso/openSUSE-12.3-GNOME-Live-i686.iso")

if err != nil {

panic(err)

}

fmt.Println("Resp code", resp.StatusCode)

        // read some data but not all

resp.Body.Close() //  stop here, even shutdown network

}

BTW: Don't motion HEAD

////////////////////////////////////////////////////////////////////////////////////////////////////////////

[Dave Cheney]

Calling resp.Body.Close() must read the _entire_ response body (some
700mb). I don't know what you meant about HEAD, but that would sound
like the HTTP verb you are looking for.

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[Wendal Chen]

So, I can't close it before read ALL data?

2013/3/16 Dave Cheney <da...@cheney.net>

[Dave Cheney]

That is correct. You _must_ close the response body, and closing the
response body _must_ read all the data on the connection so it can
return the connection to the connection pool.

[Tong Sun]

Not to question the decision, but that seem really counter-intuitive, as I think people stop web requests in the middle all the times. 

Why go insists on reading the _entire_ response body before resp.Body.Close(), even some 700mb has to be read and discarded? Again, just curious to know. Also, any other method that allow people  stop in the middle of web requests? 

Thanks

[dio...@gmail.com]

You ever get an answer to this? 

[Robert Engels]

You can stop on the middle of the request - but then you cannot reuse the http connection. 

If you want more advanced reuse you need to transfer in chunks and have a higher level protocol

Also, I think this is addressed in HTTP2 since all connections are multiplexed anyway. 

On May 21, 2020, at 1:37 PM, dio...@gmail.com wrote:



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